git.delta.rocks / unique-network / refs/commits / a693cedc8a87

difftreelog

Merge pull request #632 from UniqueNetwork/tests/playgrounds-cleanup

ut-akuznetsov2022-10-06parents: #65f16a3 #f462fd9.patch.diff
in: master
Tests/playgrounds cleanup

69 files changed

modifiedtests/src/.outdated/addToContractAllowList.test.tsdiffbeforeafterboth
--- a/tests/src/.outdated/addToContractAllowList.test.ts
+++ b/tests/src/.outdated/addToContractAllowList.test.ts
@@ -17,12 +17,8 @@
 import chai from 'chai';
 import chaiAsPromised from 'chai-as-promised';
 import usingApi, {submitTransactionAsync, submitTransactionExpectFailAsync} from '../substrate/substrate-api';
-import {
-  deployFlipper,
-} from '../util/contracthelpers';
-import {
-  getGenericResult,
-} from '../util/helpers';
+import {deployFlipper} from '../deprecated-helpers/contracthelpers';
+import {getGenericResult} from '../deprecated-helpers/helpers';
 
 chai.use(chaiAsPromised);
 const expect = chai.expect;
modifiedtests/src/.outdated/contracts.test.tsdiffbeforeafterboth
--- a/tests/src/.outdated/contracts.test.ts
+++ b/tests/src/.outdated/contracts.test.ts
@@ -19,11 +19,7 @@
 import usingApi, {submitTransactionAsync} from '../substrate/substrate-api';
 import fs from 'fs';
 import {Abi, ContractPromise as Contract} from '@polkadot/api-contract';
-import {
-  deployFlipper,
-  getFlipValue,
-  deployTransferContract,
-} from '../util/contracthelpers';
+import {deployFlipper, getFlipValue, deployTransferContract} from '../deprecated-helpers/contracthelpers';
 
 import {
   addToAllowListExpectSuccess,
@@ -37,7 +33,7 @@
   isAllowlisted,
   transferFromExpectSuccess,
   getTokenOwner,
-} from '../util/helpers';
+} from '../deprecated-helpers/helpers';
 
 
 chai.use(chaiAsPromised);
modifiedtests/src/.outdated/enableContractSponsoring.test.tsdiffbeforeafterboth
--- a/tests/src/.outdated/enableContractSponsoring.test.ts
+++ b/tests/src/.outdated/enableContractSponsoring.test.ts
@@ -18,13 +18,13 @@
 import chai from 'chai';
 import chaiAsPromised from 'chai-as-promised';
 import usingApi from '../substrate/substrate-api';
-import {deployFlipper, getFlipValue, toggleFlipValueExpectSuccess} from '../util/contracthelpers';
+import {deployFlipper, getFlipValue, toggleFlipValueExpectSuccess} from '../deprecated-helpers/contracthelpers';
 import {
   enableContractSponsoringExpectFailure,
   enableContractSponsoringExpectSuccess,
   findUnusedAddress,
   setContractSponsoringRateLimitExpectSuccess,
-} from '../util/helpers';
+} from '../deprecated-helpers/helpers';
 
 chai.use(chaiAsPromised);
 const expect = chai.expect;
addedtests/src/.outdated/eth/scheduling.test.tsdiffbeforeafterboth
--- /dev/null
+++ b/tests/src/.outdated/eth/scheduling.test.ts
@@ -0,0 +1,59 @@
+// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.
+// This file is part of Unique Network.
+
+// Unique Network is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Unique Network is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
+
+import {expect} from 'chai';
+import {createEthAccountWithBalance, deployFlipper, GAS_ARGS, itWeb3, subToEth, transferBalanceToEth} from '../../deprecated-helpers/eth/helpers';
+import {scheduleExpectSuccess, waitNewBlocks, requirePallets, Pallets} from '../../deprecated-helpers/helpers';
+
+// TODO mrshiposha update this test in #581
+describe.skip('Scheduing EVM smart contracts', () => {
+  before(async function() {
+    await requirePallets(this, [Pallets.Scheduler]);
+  });
+
+  itWeb3('Successfully schedules and periodically executes an EVM contract', async ({api, web3, privateKeyWrapper}) => {
+    const deployer = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
+    const flipper = await deployFlipper(web3, deployer);
+    const initialValue = await flipper.methods.getValue().call();
+    const alice = privateKeyWrapper('//Alice');
+    await transferBalanceToEth(api, alice, subToEth(alice.address));
+
+    {
+      const tx = api.tx.evm.call(
+        subToEth(alice.address),
+        flipper.options.address,
+        flipper.methods.flip().encodeABI(),
+        '0',
+        GAS_ARGS.gas,
+        await web3.eth.getGasPrice(),
+        null,
+        null,
+        [],
+      );
+      const waitForBlocks = 4;
+      const periodBlocks = 2;
+
+      await scheduleExpectSuccess(tx, alice, waitForBlocks, '0x' + '0'.repeat(32), periodBlocks, 2);
+      expect(await flipper.methods.getValue().call()).to.be.equal(initialValue);
+      
+      await waitNewBlocks(waitForBlocks - 1);
+      expect(await flipper.methods.getValue().call()).to.be.not.equal(initialValue);
+  
+      await waitNewBlocks(periodBlocks);
+      expect(await flipper.methods.getValue().call()).to.be.equal(initialValue);
+    }
+  });
+});
modifiedtests/src/.outdated/overflow.test.tsdiffbeforeafterboth
--- a/tests/src/.outdated/overflow.test.ts
+++ b/tests/src/.outdated/overflow.test.ts
@@ -18,7 +18,7 @@
 import chai from 'chai';
 import chaiAsPromised from 'chai-as-promised';
 import usingApi from '../substrate/substrate-api';
-import {approveExpectSuccess, createCollectionExpectSuccess, createFungibleItemExpectSuccess, getAllowance, getBalance, transferExpectFailure, transferExpectSuccess, transferFromExpectFail, transferFromExpectSuccess, U128_MAX} from '../util/helpers';
+import {approveExpectSuccess, createCollectionExpectSuccess, createFungibleItemExpectSuccess, getAllowance, getBalance, transferExpectFailure, transferExpectSuccess, transferFromExpectFail, transferFromExpectSuccess, U128_MAX} from '../deprecated-helpers/helpers';
 
 chai.use(chaiAsPromised);
 const expect = chai.expect;
modifiedtests/src/.outdated/removeFromContractAllowList.test.tsdiffbeforeafterboth
--- a/tests/src/.outdated/removeFromContractAllowList.test.ts
+++ b/tests/src/.outdated/removeFromContractAllowList.test.ts
@@ -15,8 +15,8 @@
 // along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
 
 import usingApi from '../substrate/substrate-api';
-import {deployFlipper, toggleFlipValueExpectFailure, toggleFlipValueExpectSuccess} from '../util/contracthelpers';
-import {addToContractAllowListExpectSuccess, isAllowlistedInContract, removeFromContractAllowListExpectFailure, removeFromContractAllowListExpectSuccess, toggleContractAllowlistExpectSuccess} from '../util/helpers';
+import {deployFlipper, toggleFlipValueExpectFailure, toggleFlipValueExpectSuccess} from '../deprecated-helpers/contracthelpers';
+import {addToContractAllowListExpectSuccess, isAllowlistedInContract, removeFromContractAllowListExpectFailure, removeFromContractAllowListExpectSuccess, toggleContractAllowlistExpectSuccess} from '../deprecated-helpers/helpers';
 import {IKeyringPair} from '@polkadot/types/types';
 import {expect} from 'chai';
 
modifiedtests/src/.outdated/scheduler.test.tsdiffbeforeafterboth
--- a/tests/src/.outdated/scheduler.test.ts
+++ b/tests/src/.outdated/scheduler.test.ts
@@ -39,7 +39,7 @@
   getFreeBalance,
   confirmSponsorshipByKeyExpectSuccess,
   scheduleExpectFailure,
-} from '../util/helpers';
+} from '../deprecated-helpers/helpers';
 import {IKeyringPair} from '@polkadot/types/types';
 
 chai.use(chaiAsPromised);
modifiedtests/src/.outdated/setChainLimits.test.tsdiffbeforeafterboth
--- a/tests/src/.outdated/setChainLimits.test.ts
+++ b/tests/src/.outdated/setChainLimits.test.ts
@@ -21,7 +21,7 @@
   addCollectionAdminExpectSuccess,
   setChainLimitsExpectFailure,
   IChainLimits,
-} from '../util/helpers';
+} from '../deprecated-helpers/helpers';
 
 // todo:playgrounds skipped ~ postponed
 describe.skip('Negative Integration Test setChainLimits', () => {
modifiedtests/src/.outdated/setContractSponsoringRateLimit.test.tsdiffbeforeafterboth
--- a/tests/src/.outdated/setContractSponsoringRateLimit.test.ts
+++ b/tests/src/.outdated/setContractSponsoringRateLimit.test.ts
@@ -17,13 +17,13 @@
 import {IKeyringPair} from '@polkadot/types/types';
 import usingApi from '../substrate/substrate-api';
 import waitNewBlocks from '../substrate/wait-new-blocks';
-import {deployFlipper, toggleFlipValueExpectFailure, toggleFlipValueExpectSuccess} from '../util/contracthelpers';
+import {deployFlipper, toggleFlipValueExpectFailure, toggleFlipValueExpectSuccess} from '../deprecated-helpers/contracthelpers';
 import {
   enableContractSponsoringExpectSuccess,
   findUnusedAddress,
   setContractSponsoringRateLimitExpectFailure,
   setContractSponsoringRateLimitExpectSuccess,
-} from '../util/helpers';
+} from '../deprecated-helpers/helpers';
 
 // todo:playgrounds skipped~postponed test
 describe.skip('Integration Test setContractSponsoringRateLimit', () => {
modifiedtests/src/.outdated/toggleContractAllowList.test.tsdiffbeforeafterboth
--- a/tests/src/.outdated/toggleContractAllowList.test.ts
+++ b/tests/src/.outdated/toggleContractAllowList.test.ts
@@ -20,10 +20,10 @@
 import {
   deployFlipper,
   getFlipValue,
-} from '../util/contracthelpers';
+} from '../deprecated-helpers/contracthelpers';
 import {
   getGenericResult,
-} from '../util/helpers';
+} from '../deprecated-helpers/helpers';
 
 chai.use(chaiAsPromised);
 const expect = chai.expect;
modifiedtests/src/.outdated/xcmTransfer.test.tsdiffbeforeafterboth
--- a/tests/src/.outdated/xcmTransfer.test.ts
+++ b/tests/src/.outdated/xcmTransfer.test.ts
@@ -21,7 +21,7 @@
 import {ApiOptions} from '@polkadot/api/types';
 import {IKeyringPair} from '@polkadot/types/types';
 import usingApi, {submitTransactionAsync} from '../substrate/substrate-api';
-import {getGenericResult} from '../util/helpers';
+import {getGenericResult} from '../deprecated-helpers/helpers';
 import waitNewBlocks from '../substrate/wait-new-blocks';
 import getBalance from '../substrate/get-balance';
 
modifiedtests/src/addCollectionAdmin.test.tsdiffbeforeafterboth
--- a/tests/src/addCollectionAdmin.test.ts
+++ b/tests/src/addCollectionAdmin.test.ts
@@ -110,7 +110,7 @@
     const [alice, ...accounts] = await helper.arrange.createAccounts([10n, 0n, 0n, 0n, 0n, 0n, 0n, 0n], donor);
     const collection = await helper.nft.mintCollection(alice, {name: 'Collection Name', description: 'Collection Description', tokenPrefix: 'COL'});
 
-    const chainAdminLimit = (helper.api!.consts.common.collectionAdminsLimit as any).toNumber();
+    const chainAdminLimit = (helper.getApi().consts.common.collectionAdminsLimit as any).toNumber();
     expect(chainAdminLimit).to.be.equal(5);
 
     for (let i = 0; i < chainAdminLimit; i++) {
modifiedtests/src/app-promotion.test.tsdiffbeforeafterboth
--- a/tests/src/app-promotion.test.ts
+++ b/tests/src/app-promotion.test.ts
@@ -15,17 +15,11 @@
 // along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
 
 import {IKeyringPair} from '@polkadot/types/types';
-import {
-  normalizeAccountId,
-  getModuleNames,
-  Pallets,
-} from './util/helpers';
-import {itSub, usingPlaygrounds} from './util/playgrounds';
+import {itSub, usingPlaygrounds, Pallets, requirePalletsOrSkip} from './util/playgrounds';
 import {encodeAddress} from '@polkadot/util-crypto';
 import {stringToU8a} from '@polkadot/util';
-import {SponsoringMode} from './eth/util/helpers';
 import {DevUniqueHelper} from './util/playgrounds/unique.dev';
-import {itEth, expect} from './eth/util/playgrounds';
+import {itEth, expect, SponsoringMode} from './eth/util/playgrounds';
 
 let alice: IKeyringPair;
 let palletAdmin: IKeyringPair;
@@ -42,10 +36,11 @@
 describe('App promotion', () => {
   before(async function () {
     await usingPlaygrounds(async (helper, privateKey) => {
-      if (!getModuleNames(helper.api!).includes(Pallets.AppPromotion)) this.skip();
+      requirePalletsOrSkip(this, helper, [Pallets.AppPromotion]);
       alice = privateKey('//Alice');
       palletAdmin = privateKey('//Charlie'); // TODO use custom address
-      await helper.signTransaction(alice, helper.api!.tx.sudo.sudo(helper.api!.tx.appPromotion.setAdminAddress({Substrate: palletAdmin.address})));
+      const api = helper.getApi();
+      await helper.signTransaction(alice, api.tx.sudo.sudo(api.tx.appPromotion.setAdminAddress({Substrate: palletAdmin.address})));
       nominal = helper.balance.getOneTokenNominal();
       await helper.balance.transferToSubstrate(alice, palletAdmin.address, 1000n * nominal);
       await helper.balance.transferToSubstrate(alice, palletAddress, 1000n * nominal);
@@ -231,54 +226,59 @@
   
   describe('admin adress', () => {
     itSub('can be set by sudo only', async ({helper}) => {
+      const api = helper.getApi();
       const nonAdmin = accounts.pop()!;
       // nonAdmin can not set admin not from himself nor as a sudo
-      await expect(helper.signTransaction(nonAdmin, helper.api!.tx.appPromotion.setAdminAddress({Substrate: nonAdmin.address}))).to.be.rejected;
-      await expect(helper.signTransaction(nonAdmin, helper.api!.tx.sudo.sudo(helper.api!.tx.appPromotion.setAdminAddress({Substrate: nonAdmin.address})))).to.be.rejected;
+      await expect(helper.signTransaction(nonAdmin, api.tx.appPromotion.setAdminAddress({Substrate: nonAdmin.address}))).to.be.rejected;
+      await expect(helper.signTransaction(nonAdmin, api.tx.sudo.sudo(api.tx.appPromotion.setAdminAddress({Substrate: nonAdmin.address})))).to.be.rejected;
   
       // Alice can
-      await expect(helper.signTransaction(alice, helper.api!.tx.sudo.sudo(helper.api!.tx.appPromotion.setAdminAddress({Substrate: palletAdmin.address})))).to.be.fulfilled;
+      await expect(helper.signTransaction(alice, api.tx.sudo.sudo(api.tx.appPromotion.setAdminAddress({Substrate: palletAdmin.address})))).to.be.fulfilled;
     });
     
     itSub('can be any valid CrossAccountId', async ({helper}) => {
       // We are not going to set an eth address as a sponsor,
       // but we do want to check, it doesn't break anything;
+      const api = helper.getApi();
       const account = accounts.pop()!;
       const ethAccount = helper.address.substrateToEth(account.address); 
       // Alice sets Ethereum address as a sudo. Then Substrate address back...
-      await expect(helper.signTransaction(alice, helper.api!.tx.sudo.sudo(helper.api!.tx.appPromotion.setAdminAddress({Ethereum: ethAccount})))).to.be.fulfilled;
-      await expect(helper.signTransaction(alice, helper.api!.tx.sudo.sudo(helper.api!.tx.appPromotion.setAdminAddress({Substrate: palletAdmin.address})))).to.be.fulfilled;
+      await expect(helper.signTransaction(alice, api.tx.sudo.sudo(api.tx.appPromotion.setAdminAddress({Ethereum: ethAccount})))).to.be.fulfilled;
+      await expect(helper.signTransaction(alice, api.tx.sudo.sudo(api.tx.appPromotion.setAdminAddress({Substrate: palletAdmin.address})))).to.be.fulfilled;
         
       // ...It doesn't break anything;
       const collection = await helper.nft.mintCollection(account, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion'});
-      await expect(helper.signTransaction(account, helper.api!.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.rejected;
+      await expect(helper.signTransaction(account, api.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.rejected;
     });
   
     itSub('can be reassigned', async ({helper}) => {
+      const api = helper.getApi();
       const [oldAdmin, newAdmin, collectionOwner] = [accounts.pop()!, accounts.pop()!, accounts.pop()!];
       const collection  = await helper.nft.mintCollection(collectionOwner, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion'});
         
-      await expect(helper.signTransaction(alice, helper.api!.tx.sudo.sudo(helper.api!.tx.appPromotion.setAdminAddress(normalizeAccountId(oldAdmin))))).to.be.fulfilled;
-      await expect(helper.signTransaction(alice, helper.api!.tx.sudo.sudo(helper.api!.tx.appPromotion.setAdminAddress(normalizeAccountId(newAdmin))))).to.be.fulfilled;
-      await expect(helper.signTransaction(oldAdmin, helper.api!.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.rejected;
+      await expect(helper.signTransaction(alice, api.tx.sudo.sudo(api.tx.appPromotion.setAdminAddress({Substrate: oldAdmin.address})))).to.be.fulfilled;
+      await expect(helper.signTransaction(alice, api.tx.sudo.sudo(api.tx.appPromotion.setAdminAddress({Substrate: newAdmin.address})))).to.be.fulfilled;
+      await expect(helper.signTransaction(oldAdmin, api.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.rejected;
         
-      await expect(helper.signTransaction(newAdmin, helper.api!.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.fulfilled;
+      await expect(helper.signTransaction(newAdmin, api.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.fulfilled;
     });
   });
   
   describe('collection sponsoring', () => {
     before(async function () {
       await usingPlaygrounds(async (helper) => {
-        const tx = helper.api!.tx.sudo.sudo(helper.api!.tx.appPromotion.setAdminAddress({Substrate: palletAdmin.address}));
+        const api = helper.getApi();
+        const tx = api.tx.sudo.sudo(api.tx.appPromotion.setAdminAddress({Substrate: palletAdmin.address}));
         await helper.signTransaction(alice, tx);
       });
     });
   
     itSub('should actually sponsor transactions', async ({helper}) => {
+      const api = helper.getApi();
       const [collectionOwner, tokenSender, receiver] = [accounts.pop()!, accounts.pop()!, accounts.pop()!];
       const collection = await helper.nft.mintCollection(collectionOwner, {name: 'Name', description: 'Description', tokenPrefix: 'Prefix', limits: {sponsorTransferTimeout: 0}});
       const token = await collection.mintToken(collectionOwner, {Substrate: tokenSender.address});
-      await helper.signTransaction(palletAdmin, helper.api!.tx.appPromotion.sponsorCollection(collection.collectionId));
+      await helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(collection.collectionId));
       const palletBalanceBefore = await helper.balance.getSubstrate(palletAddress);
   
       await token.transfer(tokenSender, {Substrate: receiver.address});
@@ -291,41 +291,44 @@
     });
   
     itSub('can not be set by non admin', async ({helper}) => {
+      const api = helper.getApi();
       const [collectionOwner, nonAdmin] = [accounts.pop()!, accounts.pop()!];
   
       const collection  = await helper.nft.mintCollection(collectionOwner, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion'});
         
-      await expect(helper.signTransaction(nonAdmin, helper.api!.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.rejected;
+      await expect(helper.signTransaction(nonAdmin, api.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.rejected;
       expect((await collection.getData())?.raw.sponsorship).to.equal('Disabled');
     });
   
     itSub('should set pallet address as confirmed admin', async ({helper}) => {
+      const api = helper.getApi();
       const [collectionOwner, oldSponsor] = [accounts.pop()!, accounts.pop()!];
         
       // Can set sponsoring for collection without sponsor
       const collectionWithoutSponsor = await helper.nft.mintCollection(collectionOwner, {name: 'No-sponsor', description: 'New Collection', tokenPrefix: 'Promotion'});
-      await expect(helper.signTransaction(palletAdmin, helper.api!.tx.appPromotion.sponsorCollection(collectionWithoutSponsor.collectionId))).to.be.fulfilled;
+      await expect(helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(collectionWithoutSponsor.collectionId))).to.be.fulfilled;
       expect((await collectionWithoutSponsor.getData())?.raw.sponsorship).to.be.deep.equal({Confirmed: palletAddress});
   
       // Can set sponsoring for collection with unconfirmed sponsor
       const collectionWithUnconfirmedSponsor = await helper.nft.mintCollection(collectionOwner, {name: 'Unconfirmed', description: 'New Collection', tokenPrefix: 'Promotion', pendingSponsor: oldSponsor.address});
       expect((await collectionWithUnconfirmedSponsor.getData())?.raw.sponsorship).to.be.deep.equal({Unconfirmed: oldSponsor.address});
-      await expect(helper.signTransaction(palletAdmin, helper.api!.tx.appPromotion.sponsorCollection(collectionWithUnconfirmedSponsor.collectionId))).to.be.fulfilled;
+      await expect(helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(collectionWithUnconfirmedSponsor.collectionId))).to.be.fulfilled;
       expect((await collectionWithUnconfirmedSponsor.getData())?.raw.sponsorship).to.be.deep.equal({Confirmed: palletAddress});
   
       // Can set sponsoring for collection with confirmed sponsor
       const collectionWithConfirmedSponsor = await helper.nft.mintCollection(collectionOwner, {name: 'Confirmed', description: 'New Collection', tokenPrefix: 'Promotion', pendingSponsor: oldSponsor.address});
       await collectionWithConfirmedSponsor.confirmSponsorship(oldSponsor);
-      await expect(helper.signTransaction(palletAdmin, helper.api!.tx.appPromotion.sponsorCollection(collectionWithConfirmedSponsor.collectionId))).to.be.fulfilled;
+      await expect(helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(collectionWithConfirmedSponsor.collectionId))).to.be.fulfilled;
       expect((await collectionWithConfirmedSponsor.getData())?.raw.sponsorship).to.be.deep.equal({Confirmed: palletAddress});
     });
   
     itSub('can be overwritten by collection owner', async ({helper}) => {    
+      const api = helper.getApi();
       const [collectionOwner, newSponsor] = [accounts.pop()!, accounts.pop()!];
       const collection  = await helper.nft.mintCollection(collectionOwner, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion'});
       const collectionId = collection.collectionId;
         
-      await expect(helper.signTransaction(palletAdmin, helper.api!.tx.appPromotion.sponsorCollection(collectionId))).to.be.fulfilled;
+      await expect(helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(collectionId))).to.be.fulfilled;
         
       // Collection limits still can be changed by the owner
       expect(await collection.setLimits(collectionOwner, {sponsorTransferTimeout: 0})).to.be.true;
@@ -338,44 +341,48 @@
     });
     
     itSub('should not overwrite collection limits set by the owner earlier', async ({helper}) => {
+      const api = helper.getApi();
       const limits = {ownerCanDestroy: true, ownerCanTransfer: true, sponsorTransferTimeout: 0};
       const collectionWithLimits = await helper.nft.mintCollection(alice, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion', limits});
   
-      await expect(helper.signTransaction(palletAdmin, helper.api!.tx.appPromotion.sponsorCollection(collectionWithLimits.collectionId))).to.be.fulfilled;
+      await expect(helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(collectionWithLimits.collectionId))).to.be.fulfilled;
       expect((await collectionWithLimits.getData())?.raw.limits).to.be.deep.contain(limits);
     });
     
     itSub('should reject transaction if collection doesn\'t exist', async ({helper}) => {
+      const api = helper.getApi();
       const collectionOwner = accounts.pop()!;
         
       // collection has never existed
-      await expect(helper.signTransaction(palletAdmin, helper.api!.tx.appPromotion.sponsorCollection(999999999))).to.be.rejected;
+      await expect(helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(999999999))).to.be.rejected;
       // collection has been burned
       const collection = await helper.nft.mintCollection(collectionOwner, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion'});
       await collection.burn(collectionOwner);
   
-      await expect(helper.signTransaction(palletAdmin, helper.api!.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.rejected;
+      await expect(helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.rejected;
     });
   });
   
   describe('stopSponsoringCollection', () => {
-    itSub('can not be called by non-admin', async ({helper}) => {    
+    itSub('can not be called by non-admin', async ({helper}) => {
+      const api = helper.getApi();
       const [collectionOwner, nonAdmin] = [accounts.pop()!, accounts.pop()!];
       const collection = await helper.nft.mintCollection(collectionOwner, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion'});
         
-      await expect(helper.signTransaction(palletAdmin, helper.api!.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.fulfilled;
+      await expect(helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(collection.collectionId))).to.be.fulfilled;
         
-      await expect(helper.signTransaction(nonAdmin, helper.api!.tx.appPromotion.stopSponsoringCollection(collection.collectionId))).to.be.rejected;
+      await expect(helper.signTransaction(nonAdmin, api.tx.appPromotion.stopSponsoringCollection(collection.collectionId))).to.be.rejected;
       expect((await collection.getData())?.raw.sponsorship).to.be.deep.equal({Confirmed: palletAddress});
     });
   
     itSub('should set sponsoring as disabled', async ({helper}) => {
+      const api = helper.getApi();
       const [collectionOwner, recepient] = [accounts.pop()!, accounts.pop()!];
       const collection = await helper.nft.mintCollection(collectionOwner, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion', limits: {sponsorTransferTimeout: 0}});
       const token = await collection.mintToken(collectionOwner, {Substrate: collectionOwner.address});
         
-      await helper.signTransaction(palletAdmin, helper.api!.tx.appPromotion.sponsorCollection(collection.collectionId));
-      await helper.signTransaction(palletAdmin, helper.api!.tx.appPromotion.stopSponsoringCollection(collection.collectionId));
+      await helper.signTransaction(palletAdmin, api.tx.appPromotion.sponsorCollection(collection.collectionId));
+      await helper.signTransaction(palletAdmin, api.tx.appPromotion.stopSponsoringCollection(collection.collectionId));
         
       expect((await collection.getData())?.raw.sponsorship).to.be.equal('Disabled');
   
@@ -387,11 +394,12 @@
     });
   
     itSub('should not affect collection which is not sponsored by pallete', async ({helper}) => {
+      const api = helper.getApi();
       const collectionOwner = accounts.pop()!;
       const collection = await helper.nft.mintCollection(collectionOwner, {name: 'New', description: 'New Collection', tokenPrefix: 'Promotion', pendingSponsor: collectionOwner.address});
       await collection.confirmSponsorship(collectionOwner);
         
-      await expect(helper.signTransaction(palletAdmin, helper.api!.tx.appPromotion.stopSponsoringCollection(collection.collectionId))).to.be.rejected;
+      await expect(helper.signTransaction(palletAdmin, api.tx.appPromotion.stopSponsoringCollection(collection.collectionId))).to.be.rejected;
         
       expect((await collection.getData())?.raw.sponsorship).to.be.deep.equal({Confirmed: collectionOwner.address});
     });
@@ -415,8 +423,8 @@
       await helper.executeExtrinsic(palletAdmin, 'api.tx.appPromotion.sponsorContract', [flipper.options.address]);
       
       expect(await contractHelper.methods.hasSponsor(flipper.options.address).call()).to.be.true;  
-      expect((await helper.api!.query.evmContractHelpers.owner(flipper.options.address)).toJSON()).to.be.equal(contractOwner);  
-      expect((await helper.api!.query.evmContractHelpers.sponsoring(flipper.options.address)).toJSON()).to.deep.equal({
+      expect((await helper.callRpc('api.query.evmContractHelpers.owner', [flipper.options.address])).toJSON()).to.be.equal(contractOwner);  
+      expect((await helper.callRpc('api.query.evmContractHelpers.sponsoring', [flipper.options.address])).toJSON()).to.deep.equal({
         confirmed: {
           substrate: palletAddress,
         },
@@ -431,7 +439,7 @@
       await expect(contractHelper.methods.selfSponsoredEnable(flipper.options.address).send()).to.be.fulfilled;
   
       // Contract is self sponsored
-      expect((await helper.api!.query.evmContractHelpers.sponsoring(flipper.options.address)).toJSON()).to.be.deep.equal({
+      expect((await helper.callRpc('api.query.evmContractHelpers.sponsoring', [flipper.options.address])).toJSON()).to.be.deep.equal({
         confirmed: {
           ethereum: flipper.options.address.toLowerCase(),
         },
@@ -462,8 +470,8 @@
       await expect(contractHelper.methods.selfSponsoredEnable(flipper.options.address).send()).to.be.not.rejected;
   
       expect(await contractHelper.methods.hasSponsor(flipper.options.address).call()).to.be.true;  
-      expect((await helper.api!.query.evmContractHelpers.owner(flipper.options.address)).toJSON()).to.be.equal(contractOwner);  
-      expect((await helper.api!.query.evmContractHelpers.sponsoring(flipper.options.address)).toJSON()).to.deep.equal({
+      expect((await helper.callRpc('api.query.evmContractHelpers.owner', [flipper.options.address])).toJSON()).to.be.equal(contractOwner);  
+      expect((await helper.callRpc('api.query.evmContractHelpers.sponsoring', [flipper.options.address])).toJSON()).to.deep.equal({
         confirmed: {
           ethereum: flipper.options.address.toLowerCase(),
         },
@@ -482,7 +490,7 @@
       await expect(helper.executeExtrinsic(nonAdmin, 'api.tx.appPromotion.sponsorContract', [flipper.options.address], true)).to.be.rejectedWith('appPromotion.NoPermission');
   
       // contract still self-sponsored 
-      expect((await helper.api!.query.evmContractHelpers.sponsoring(flipper.options.address)).toJSON()).to.deep.equal({
+      expect((await helper.callRpc('api.query.evmContractHelpers.sponsoring', [flipper.options.address])).toJSON()).to.deep.equal({
         confirmed: {
           ethereum: flipper.options.address.toLowerCase(),
         },
@@ -505,7 +513,7 @@
       await helper.eth.transferBalanceFromSubstrate(alice, flipper.options.address, 1000n); // transferBalanceToEth(api, alice, flipper.options.address, 1000n);
   
       // Set promotion to the Flipper
-      await helper.signTransaction(palletAdmin, helper.api!.tx.appPromotion.sponsorContract(flipper.options.address));
+      await helper.executeExtrinsic(palletAdmin, 'api.tx.appPromotion.sponsorContract', [flipper.options.address], true);
   
       // Caller calls Flipper
       await flipper.methods.flip().send({from: caller});
@@ -536,8 +544,8 @@
       await helper.executeExtrinsic(palletAdmin, 'api.tx.appPromotion.stopSponsoringContract', [flipper.options.address], true);
   
       expect(await contractHelper.methods.hasSponsor(flipper.options.address).call()).to.be.false;  
-      expect((await helper.api!.query.evmContractHelpers.owner(flipper.options.address)).toJSON()).to.be.equal(contractOwner);  
-      expect((await helper.api!.query.evmContractHelpers.sponsoring(flipper.options.address)).toJSON()).to.deep.equal({
+      expect((await helper.callRpc('api.query.evmContractHelpers.owner', [flipper.options.address])).toJSON()).to.be.equal(contractOwner);  
+      expect((await helper.callRpc('api.query.evmContractHelpers.sponsoring', [flipper.options.address])).toJSON()).to.deep.equal({
         disabled: null,
       });
   
@@ -717,7 +725,7 @@
 // Wait while promotion period less than specified block, to avoid boundary cases
 // 0 if this should be the beginning of the period.
 async function waitPromotionPeriodDoesntEnd(helper: DevUniqueHelper, waitBlockLessThan = LOCKING_PERIOD / 3n) {
-  const relayBlockNumber = (await helper.api!.query.parachainSystem.validationData()).value.relayParentNumber.toNumber(); // await helper.chain.getLatestBlockNumber();
+  const relayBlockNumber = (await helper.callRpc('api.query.parachainSystem.validationData', [])).value.relayParentNumber.toNumber(); // await helper.chain.getLatestBlockNumber();
   const currentPeriodBlock = BigInt(relayBlockNumber) % LOCKING_PERIOD;
 
   if (currentPeriodBlock > waitBlockLessThan) {
modifiedtests/src/approve.test.tsdiffbeforeafterboth
--- a/tests/src/approve.test.ts
+++ b/tests/src/approve.test.ts
@@ -60,7 +60,7 @@
     const {tokenId} = await helper.nft.mintToken(alice, {collectionId: collectionId, owner: alice.address});
     await helper.nft.approveToken(alice, collectionId, tokenId, {Substrate: bob.address});
     expect(await helper.nft.isTokenApproved(collectionId, tokenId, {Substrate: bob.address})).to.be.true;
-    await helper.signTransaction(alice, helper.api?.tx.unique.approve({Substrate: bob.address}, collectionId, tokenId, 0));
+    await helper.signTransaction(alice, helper.constructApiCall('api.tx.unique.approve', [{Substrate: bob.address}, collectionId, tokenId, 0]));
     expect(await helper.nft.isTokenApproved(collectionId, tokenId, {Substrate: bob.address})).to.be.false;
   });
 
@@ -275,7 +275,7 @@
     const {tokenId} = await helper.nft.mintToken(alice, {collectionId: collectionId, owner: alice.address});
     await helper.nft.approveToken(alice, collectionId, tokenId, {Substrate: bob.address});
     expect(await helper.nft.isTokenApproved(collectionId, tokenId, {Substrate: bob.address})).to.be.true;
-    await helper.signTransaction(alice, helper.api?.tx.unique.approve({Substrate: bob.address}, collectionId, tokenId, 0));
+    await helper.signTransaction(alice, helper.constructApiCall('api.tx.unique.approve', [{Substrate: bob.address}, collectionId, tokenId, 0]));
     expect(await helper.nft.isTokenApproved(collectionId, tokenId, {Substrate: bob.address})).to.be.false;
     const transferTokenFromTx = async () => helper.nft.transferTokenFrom(bob, collectionId, tokenId, {Substrate: bob.address}, {Substrate: bob.address});
     await expect(transferTokenFromTx()).to.be.rejected;
@@ -328,7 +328,7 @@
   itSub('1 for NFT', async ({helper}) => {
     const {collectionId} = await helper.nft.mintCollection(alice, {name: 'col', description: 'descr', tokenPrefix: 'COL'});
     const {tokenId} = await helper.nft.mintToken(alice, {collectionId: collectionId, owner: bob.address});
-    const approveTx = async () => helper.signTransaction(bob, helper.api?.tx.unique.approve({Substrate: charlie.address}, collectionId, tokenId, 2));
+    const approveTx = async () => helper.signTransaction(bob, helper.constructApiCall('api.tx.unique.approve', [{Substrate: charlie.address}, collectionId, tokenId, 2]));
     await expect(approveTx()).to.be.rejected;
     expect(await helper.nft.isTokenApproved(collectionId, tokenId, {Substrate: charlie.address})).to.be.false;
   });
modifiedtests/src/block-production.test.tsdiffbeforeafterboth
--- a/tests/src/block-production.test.ts
+++ b/tests/src/block-production.test.ts
@@ -37,7 +37,7 @@
 
 describe('Block Production smoke test', () => {
   itSub('Node produces new blocks', async ({helper}) => {
-    const blocks: number[] | undefined = await getBlocks(helper.api!);
+    const blocks: number[] | undefined = await getBlocks(helper.getApi());
     expect(blocks[0]).to.be.lessThan(blocks[1]);
   });
 });
modifiedtests/src/calibrate.tsdiffbeforeafterboth
--- a/tests/src/calibrate.ts
+++ b/tests/src/calibrate.ts
@@ -1,11 +1,8 @@
-import {ApiPromise} from '@polkadot/api';
 import {IKeyringPair} from '@polkadot/types/types';
-import Web3 from 'web3';
-import {collectionIdToAddress, createEthAccount, createEthAccountWithBalance, GAS_ARGS, recordEthFee, usingWeb3} from './eth/util/helpers';
-import usingApi, {executeTransaction} from './substrate/substrate-api';
-import {createCollectionExpectSuccess, createItemExpectSuccess, transferExpectSuccess, UNIQUE, waitNewBlocks} from './util/helpers';
-import nonFungibleAbi from './eth/nonFungibleAbi.json';
 
+import {usingEthPlaygrounds, EthUniqueHelper} from './eth/util/playgrounds';
+
+
 function linearRegression(points: { x: bigint, y: bigint }[]) {
   let sumxy = 0n;
   let sumx = 0n;
@@ -59,32 +56,33 @@
   }).reduce((a, b) => a + b, 0n) / BigInt(points.length));
 }
 
-async function calibrateWeightToFee(api: ApiPromise, privateKey: (account: string) => IKeyringPair) {
+async function calibrateWeightToFee(helper: EthUniqueHelper, privateKey: (account: string) => IKeyringPair) {
   const alice = privateKey('//Alice');
   const bob = privateKey('//Bob');
   const dataPoints = [];
 
   {
-    const collectionId = await createCollectionExpectSuccess();
-    const tokenId = await createItemExpectSuccess(alice, collectionId, 'NFT');
-    const aliceBalanceBefore = (await api.query.system.account(alice.address)).data.free.toBigInt();
-    await transferExpectSuccess(collectionId, tokenId, alice, bob, 1, 'NFT');
-    const aliceBalanceAfter = (await api.query.system.account(alice.address)).data.free.toBigInt();
+    const collection = await helper.nft.mintCollection(alice, {name: 'New', description: 'New collection', tokenPrefix: 'NEW'});
+    const token = await collection.mintToken(alice, {Substrate: alice.address});
+    const aliceBalanceBefore = await helper.balance.getSubstrate(alice.address);
+    await token.transfer(alice, {Substrate: bob.address});
+    const aliceBalanceAfter = await helper.balance.getSubstrate(alice.address);
 
-    console.log(`Original price: ${Number(aliceBalanceBefore - aliceBalanceAfter) / Number(UNIQUE)} UNQ`);
+    console.log(`Original price: ${Number(aliceBalanceBefore - aliceBalanceAfter) / Number(helper.balance.getOneTokenNominal())} UNQ`);
   }
 
+  const api = helper.getApi();
   const defaultCoeff = (api.consts.configuration.defaultWeightToFeeCoefficient as any).toBigInt();
   for (let i = -5; i < 5; i++) {
-    await executeTransaction(api, alice, api.tx.sudo.sudo(api.tx.configuration.setWeightToFeeCoefficientOverride(defaultCoeff + defaultCoeff / 1000n * BigInt(i))));
+    await helper.signTransaction(alice, api.tx.sudo.sudo(api.tx.configuration.setWeightToFeeCoefficientOverride(defaultCoeff + defaultCoeff / 1000n * BigInt(i))));
 
     const coefficient = (await api.query.configuration.weightToFeeCoefficientOverride() as any).toBigInt();
-    const collectionId = await createCollectionExpectSuccess();
-    const tokenId = await createItemExpectSuccess(alice, collectionId, 'NFT');
+    const collection = await helper.nft.mintCollection(alice, {name: 'New', description: 'New collection', tokenPrefix: 'NEW'});
+    const token = await collection.mintToken(alice, {Substrate: alice.address});
 
-    const aliceBalanceBefore = (await api.query.system.account(alice.address)).data.free.toBigInt();
-    await transferExpectSuccess(collectionId, tokenId, alice, bob, 1, 'NFT');
-    const aliceBalanceAfter = (await api.query.system.account(alice.address)).data.free.toBigInt();
+    const aliceBalanceBefore = await helper.balance.getSubstrate(alice.address);
+    await token.transfer(alice, {Substrate: bob.address});
+    const aliceBalanceAfter = await helper.balance.getSubstrate(alice.address);
 
     const transferPrice = aliceBalanceBefore - aliceBalanceAfter;
 
@@ -94,52 +92,53 @@
 
   // console.log(`Error: ${error(dataPoints, x => a*x+b)}`);
 
-  const perfectValue = a * UNIQUE / 10n + b;
-  await executeTransaction(api, alice, api.tx.sudo.sudo(api.tx.configuration.setWeightToFeeCoefficientOverride(perfectValue.toString())));
+  const perfectValue = a * helper.balance.getOneTokenNominal() / 10n + b;
+  await helper.signTransaction(alice, api.tx.sudo.sudo(api.tx.configuration.setWeightToFeeCoefficientOverride(perfectValue.toString())));
 
   {
-    const collectionId = await createCollectionExpectSuccess();
-    const tokenId = await createItemExpectSuccess(alice, collectionId, 'NFT');
-    const aliceBalanceBefore = (await api.query.system.account(alice.address)).data.free.toBigInt();
-    await transferExpectSuccess(collectionId, tokenId, alice, bob, 1, 'NFT');
-    const aliceBalanceAfter = (await api.query.system.account(alice.address)).data.free.toBigInt();
+    const collection = await helper.nft.mintCollection(alice, {name: 'New', description: 'New collection', tokenPrefix: 'NEW'});
+    const token = await collection.mintToken(alice, {Substrate: alice.address});
+    const aliceBalanceBefore = await helper.balance.getSubstrate(alice.address);
+    await token.transfer(alice, {Substrate: bob.address});
+    const aliceBalanceAfter = await helper.balance.getSubstrate(alice.address);
 
-    console.log(`Calibrated price: ${Number(aliceBalanceBefore - aliceBalanceAfter) / Number(UNIQUE)} UNQ`);
+    console.log(`Calibrated price: ${Number(aliceBalanceBefore - aliceBalanceAfter) / Number(helper.balance.getOneTokenNominal())} UNQ`);
   }
 }
 
-async function calibrateMinGasPrice(api: ApiPromise, web3: Web3, privateKey: (account: string) => IKeyringPair) {
+async function calibrateMinGasPrice(helper: EthUniqueHelper, privateKey: (account: string) => IKeyringPair) {
   const alice = privateKey('//Alice');
-  const caller = await createEthAccountWithBalance(api, web3, privateKey);
-  const receiver = createEthAccount(web3);
+  const caller = await helper.eth.createAccountWithBalance(alice);
+  const receiver = helper.eth.createAccount();
   const dataPoints = [];
 
   {
-    const collectionId = await createCollectionExpectSuccess();
-    const tokenId = await createItemExpectSuccess(alice, collectionId, 'NFT', {Ethereum: caller});
+    const collection = await helper.nft.mintCollection(alice, {name: 'New', description: 'New collection', tokenPrefix: 'NEW'});
+    const token = await collection.mintToken(alice, {Ethereum: caller});
 
-    const address = collectionIdToAddress(collectionId);
-    const contract = new web3.eth.Contract(nonFungibleAbi as any, address, {from: caller, ...GAS_ARGS});
+    const address = helper.ethAddress.fromCollectionId(collection.collectionId);
+    const contract = helper.ethNativeContract.collection(address, 'nft', caller);
 
-    const cost = await recordEthFee(api, caller, () => contract.methods.transfer(receiver, tokenId).send(caller));
+    const cost = await helper.eth.calculateFee({Ethereum: caller}, () => contract.methods.transfer(receiver, token.tokenId).send({from: caller, gas: helper.eth.DEFAULT_GAS}));
 
-    console.log(`Original price: ${Number(cost) / Number(UNIQUE)} UNQ`);
+    console.log(`Original price: ${Number(cost) / Number(helper.balance.getOneTokenNominal())} UNQ`);
   }
 
+  const api = helper.getApi();
   const defaultCoeff = (api.consts.configuration.defaultMinGasPrice as any).toBigInt();
   for (let i = -8; i < 8; i++) {
     const gasPrice = defaultCoeff + defaultCoeff / 100000n * BigInt(i);
     const gasPriceStr = '0x' + gasPrice.toString(16);
-    await executeTransaction(api, alice, api.tx.sudo.sudo(api.tx.configuration.setMinGasPriceOverride(gasPrice)));
+    await helper.signTransaction(alice, api.tx.sudo.sudo(api.tx.configuration.setMinGasPriceOverride(gasPrice)));
 
     const coefficient = (await api.query.configuration.minGasPriceOverride() as any).toBigInt();
-    const collectionId = await createCollectionExpectSuccess();
-    const tokenId = await createItemExpectSuccess(alice, collectionId, 'NFT', {Ethereum: caller});
+    const collection = await helper.nft.mintCollection(alice, {name: 'New', description: 'New collection', tokenPrefix: 'NEW'});
+    const token = await collection.mintToken(alice, {Ethereum: caller});
 
-    const address = collectionIdToAddress(collectionId);
-    const contract = new web3.eth.Contract(nonFungibleAbi as any, address, {from: caller, gasPrice: gasPriceStr, ...GAS_ARGS});
+    const address = helper.ethAddress.fromCollectionId(collection.collectionId);
+    const contract = helper.ethNativeContract.collection(address, 'nft', caller);
 
-    const transferPrice = await recordEthFee(api, caller, () => contract.methods.transfer(receiver, tokenId).send(caller));
+    const transferPrice = await helper.eth.calculateFee({Ethereum: caller}, () => contract.methods.transfer(receiver, token.tokenId).send({from: caller, gasPrice: gasPriceStr, gas: helper.eth.DEFAULT_GAS}));
 
     dataPoints.push({x: transferPrice, y: coefficient});
   }
@@ -149,34 +148,30 @@
   // console.log(`Error: ${error(dataPoints, x => a*x+b)}`);
 
   // * 0.15 = * 10000 / 66666
-  const perfectValue = a * UNIQUE * 1000000n / 6666666n + b;
-  await executeTransaction(api, alice, api.tx.sudo.sudo(api.tx.configuration.setMinGasPriceOverride(perfectValue.toString())));
+  const perfectValue = a * helper.balance.getOneTokenNominal() * 1000000n / 6666666n + b;
+  await helper.signTransaction(alice, api.tx.sudo.sudo(api.tx.configuration.setMinGasPriceOverride(perfectValue.toString())));
 
   {
-    const collectionId = await createCollectionExpectSuccess();
-    const tokenId = await createItemExpectSuccess(alice, collectionId, 'NFT', {Ethereum: caller});
+    const collection = await helper.nft.mintCollection(alice, {name: 'New', description: 'New collection', tokenPrefix: 'NEW'});
+    const token = await collection.mintToken(alice, {Ethereum: caller});
 
-    const address = collectionIdToAddress(collectionId);
-    const contract = new web3.eth.Contract(nonFungibleAbi as any, address, {from: caller, ...GAS_ARGS});
+    const address = helper.ethAddress.fromCollectionId(collection.collectionId);
+    const contract = helper.ethNativeContract.collection(address, 'nft', caller);
 
-    const cost = await recordEthFee(api, caller, () => contract.methods.transfer(receiver, tokenId).send(caller));
+    const cost = await helper.eth.calculateFee({Ethereum: caller}, () => contract.methods.transfer(receiver, token.tokenId).send({from: caller, gas: helper.eth.DEFAULT_GAS}));
 
-    console.log(`Calibrated price: ${Number(cost) / Number(UNIQUE)} UNQ`);
+    console.log(`Calibrated price: ${Number(cost) / Number(helper.balance.getOneTokenNominal())} UNQ`);
   }
 }
 
 (async () => {
-  await usingApi(async (api, privateKey) => {
+  await usingEthPlaygrounds(async (helper: EthUniqueHelper, privateKey) => {
     // Second run slightly reduces error sometimes, as price line is not actually straight, this is a curve
 
-    await calibrateWeightToFee(api, privateKey);
-    await calibrateWeightToFee(api, privateKey);
+    await calibrateWeightToFee(helper, privateKey);
+    await calibrateWeightToFee(helper, privateKey);
 
-    await usingWeb3(async web3 => {
-      await calibrateMinGasPrice(api, web3, privateKey);
-      await calibrateMinGasPrice(api, web3, privateKey);
-    });
-
-    await api.disconnect();
+    await calibrateMinGasPrice(helper, privateKey);
+    await calibrateMinGasPrice(helper, privateKey);
   });
 })();
modifiedtests/src/createMultipleItemsEx.test.tsdiffbeforeafterboth
--- a/tests/src/createMultipleItemsEx.test.ts
+++ b/tests/src/createMultipleItemsEx.test.ts
@@ -178,13 +178,12 @@
       tokenPrefix: 'COL',
     }, 0);
 
-    const api = helper.api;
-    await helper.signTransaction(alice, api?.tx.unique.createMultipleItemsEx(collection.collectionId, {
+    await helper.executeExtrinsic(alice, 'api.tx.unique.createMultipleItemsEx',[collection.collectionId, {
       Fungible: new Map([
         [JSON.stringify({Substrate: alice.address}), 50],
         [JSON.stringify({Substrate: bob.address}), 100],
       ]),
-    }));
+    }], true);
 
     expect(await collection.getBalance({Substrate: alice.address})).to.be.equal(50n);
     expect(await collection.getBalance({Substrate: bob.address})).to.be.equal(100n);
@@ -200,8 +199,7 @@
       ],
     });
 
-    const api = helper.api;
-    await helper.signTransaction(alice, api?.tx.unique.createMultipleItemsEx(collection.collectionId, {
+    await helper.executeExtrinsic(alice, 'api.tx.unique.createMultipleItemsEx', [collection.collectionId, {
       RefungibleMultipleOwners: {
         users: new Map([
           [JSON.stringify({Substrate: alice.address}), 1],
@@ -211,7 +209,7 @@
           {key: 'k', value: 'v'},
         ],
       },
-    }));
+    }], true);
     const tokenId = await collection.getLastTokenId();
     expect(tokenId).to.be.equal(1);
     expect(await collection.getTokenBalance(1, {Substrate: alice.address})).to.be.equal(1n);
@@ -228,9 +226,7 @@
       ],
     });
 
-    const api = helper.api;
-
-    await helper.signTransaction(alice, api?.tx.unique.createMultipleItemsEx(collection.collectionId, {
+    await helper.executeExtrinsic(alice, 'api.tx.unique.createMultipleItemsEx', [collection.collectionId, {
       RefungibleMultipleItems: [
         {
           user: {Substrate: alice.address}, pieces: 1,
@@ -245,7 +241,7 @@
           ],
         },
       ],
-    }));
+    }], true);
 
     expect(await collection.getLastTokenId()).to.be.equal(2);
     expect(await collection.getTokenBalance(1, {Substrate: alice.address})).to.be.equal(1n);
modifiedtests/src/creditFeesToTreasury.test.tsdiffbeforeafterboth
--- a/tests/src/creditFeesToTreasury.test.ts
+++ b/tests/src/creditFeesToTreasury.test.ts
@@ -29,7 +29,7 @@
 /*eslint no-async-promise-executor: "off"*/
 function skipInflationBlock(api: ApiPromise): Promise<void> {
   const promise = new Promise<void>(async (resolve) => {
-    const blockInterval = (await api.consts.inflation.inflationBlockInterval).toNumber();
+    const blockInterval = api.consts.inflation.inflationBlockInterval.toNumber();
     const unsubscribe = await api.rpc.chain.subscribeNewHeads(head => {
       const currentBlock = head.number.toNumber();
       if (currentBlock % blockInterval < blockInterval - 10) {
@@ -56,21 +56,21 @@
   });
 
   itSub('Total issuance does not change', async ({helper}) => {
-    const api = helper.api!;
+    const api = helper.getApi();
     await skipInflationBlock(api);
     await helper.wait.newBlocks(1);
 
-    const totalBefore = (await api.query.balances.totalIssuance()).toBigInt();
+    const totalBefore = (await helper.callRpc('api.query.balances.totalIssuance', [])).toBigInt();
 
     await helper.balance.transferToSubstrate(alice, bob.address, 1n);
 
-    const totalAfter = (await api.query.balances.totalIssuance()).toBigInt();
+    const totalAfter = (await helper.callRpc('api.query.balances.totalIssuance', [])).toBigInt();
 
     expect(totalAfter).to.be.equal(totalBefore);
   });
 
   itSub('Sender balance decreased by fee+sent amount, Treasury balance increased by fee', async ({helper}) => {
-    await skipInflationBlock(helper.api!);
+    await skipInflationBlock(helper.getApi());
     await helper.wait.newBlocks(1);
 
     const treasuryBalanceBefore = await helper.balance.getSubstrate(TREASURY);
@@ -89,7 +89,7 @@
   });
 
   itSub('Treasury balance increased by failed tx fee', async ({helper}) => {
-    const api = helper.api!;
+    const api = helper.getApi();
     await helper.wait.newBlocks(1);
 
     const treasuryBalanceBefore = await helper.balance.getSubstrate(TREASURY);
@@ -107,7 +107,7 @@
   });
 
   itSub('NFT Transactions also send fees to Treasury', async ({helper}) => {
-    await skipInflationBlock(helper.api!);
+    await skipInflationBlock(helper.getApi());
     await helper.wait.newBlocks(1);
 
     const treasuryBalanceBefore = await helper.balance.getSubstrate(TREASURY);
@@ -125,7 +125,7 @@
 
   itSub('Fees are sane', async ({helper}) => {
     const unique = helper.balance.getOneTokenNominal();
-    await skipInflationBlock(helper.api!);
+    await skipInflationBlock(helper.getApi());
     await helper.wait.newBlocks(1);
 
     const aliceBalanceBefore = await helper.balance.getSubstrate(alice.address);
@@ -140,7 +140,7 @@
   });
 
   itSub('NFT Transfer fee is close to 0.1 Unique', async ({helper}) => {
-    await skipInflationBlock(helper.api!);
+    await skipInflationBlock(helper.getApi());
     await helper.wait.newBlocks(1);
 
     const collection = await helper.nft.mintCollection(alice, {
addedtests/src/deprecated-helpers/contracthelpers.tsdiffbeforeafterboth
--- /dev/null
+++ b/tests/src/deprecated-helpers/contracthelpers.ts
@@ -0,0 +1,114 @@
+// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.
+// This file is part of Unique Network.
+
+// Unique Network is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Unique Network is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
+
+import chai from 'chai';
+import chaiAsPromised from 'chai-as-promised';
+import {submitTransactionAsync, submitTransactionExpectFailAsync} from '../substrate/substrate-api';
+import fs from 'fs';
+import {Abi, CodePromise, ContractPromise as Contract} from '@polkadot/api-contract';
+import {IKeyringPair} from '@polkadot/types/types';
+import {ApiPromise} from '@polkadot/api';
+
+chai.use(chaiAsPromised);
+const expect = chai.expect;
+import {findUnusedAddress, getGenericResult} from './helpers';
+
+const value = 0;
+const gasLimit = '200000000000';
+const endowment = '100000000000000000';
+
+/* eslint no-async-promise-executor: "off" */
+function deployContract(alice: IKeyringPair, code: CodePromise, constructor = 'default', ...args: any[]): Promise<Contract> {
+  return new Promise<Contract>(async (resolve) => {
+    const unsub = await (code as any)
+      .tx[constructor]({value: endowment, gasLimit}, ...args)
+      .signAndSend(alice, (result: any) => {
+        if (result.status.isInBlock || result.status.isFinalized) {
+          // here we have an additional field in the result, containing the blueprint
+          resolve((result as any).contract);
+          unsub();
+        }
+      });
+  });
+}
+
+async function prepareDeployer(api: ApiPromise, privateKeyWrapper: (account: string) => IKeyringPair) {
+  // Find unused address
+  const deployer = await findUnusedAddress(api, privateKeyWrapper);
+
+  // Transfer balance to it
+  const alice = privateKeyWrapper('//Alice');
+  const amount = BigInt(endowment) + 10n**15n;
+  const tx = api.tx.balances.transfer(deployer.address, amount);
+  await submitTransactionAsync(alice, tx);
+
+  return deployer;
+}
+
+export async function deployFlipper(api: ApiPromise, privateKeyWrapper: (account: string) => IKeyringPair): Promise<[Contract, IKeyringPair]> {
+  const metadata = JSON.parse(fs.readFileSync('./src/flipper/metadata.json').toString('utf-8'));
+  const abi = new Abi(metadata);
+
+  const deployer = await prepareDeployer(api, privateKeyWrapper);
+
+  const wasm = fs.readFileSync('./src/flipper/flipper.wasm');
+
+  const code = new CodePromise(api, abi, wasm);
+
+  const contract = (await deployContract(deployer, code, 'new', true)) as Contract;
+
+  const initialGetResponse = await getFlipValue(contract, deployer);
+  expect(initialGetResponse).to.be.true;
+
+  return [contract, deployer];
+}
+
+export async function getFlipValue(contract: Contract, deployer: IKeyringPair) {
+  const result = await contract.query.get(deployer.address, {value, gasLimit});
+
+  if(!result.result.isOk) {
+    throw 'Failed to get flipper value';
+  }
+  return (result.result.asOk.data[0] == 0x00) ? false : true;
+}
+
+export async function toggleFlipValueExpectSuccess(sender: IKeyringPair, contract: Contract) {
+  const tx = contract.tx.flip({value, gasLimit});
+  const events = await submitTransactionAsync(sender, tx);
+  const result = getGenericResult(events);
+
+  expect(result.success).to.be.true;
+}
+
+export async function toggleFlipValueExpectFailure(sender: IKeyringPair, contract: Contract) {
+  const tx = contract.tx.flip({value, gasLimit});
+  await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
+}
+
+export async function deployTransferContract(api: ApiPromise, privateKeyWrapper: (account: string) => IKeyringPair): Promise<[Contract, IKeyringPair]> {
+  const metadata = JSON.parse(fs.readFileSync('./src/transfer_contract/metadata.json').toString('utf-8'));
+  const abi = new Abi(metadata);
+
+  const deployer = await prepareDeployer(api, privateKeyWrapper);
+
+  const wasm = fs.readFileSync('./src/transfer_contract/nft_transfer.wasm');
+
+  const code = new CodePromise(api, abi, wasm);
+
+  const contract = await deployContract(deployer, code);
+
+  return [contract, deployer];
+}
addedtests/src/deprecated-helpers/eth/helpers.d.tsdiffbeforeafterboth
--- /dev/null
+++ b/tests/src/deprecated-helpers/eth/helpers.d.ts
@@ -0,0 +1,17 @@
+// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.
+// This file is part of Unique Network.
+
+// Unique Network is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Unique Network is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
+
+declare module 'solc';
\ No newline at end of file
addedtests/src/deprecated-helpers/eth/helpers.tsdiffbeforeafterboth
--- /dev/null
+++ b/tests/src/deprecated-helpers/eth/helpers.ts
@@ -0,0 +1,451 @@
+// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.
+// This file is part of Unique Network.
+
+// Unique Network is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Unique Network is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
+
+// eslint-disable-next-line @typescript-eslint/triple-slash-reference
+/// <reference path="helpers.d.ts" />
+
+import {ApiPromise} from '@polkadot/api';
+import {IKeyringPair} from '@polkadot/types/types';
+import {addressToEvm, evmToAddress} from '@polkadot/util-crypto';
+import {expect} from 'chai';
+import * as solc from 'solc';
+import Web3 from 'web3';
+import config from '../../config';
+import getBalance from '../../substrate/get-balance';
+import usingApi, {submitTransactionAsync} from '../../substrate/substrate-api';
+import waitNewBlocks from '../../substrate/wait-new-blocks';
+import {CollectionMode, CrossAccountId, getDetailedCollectionInfo, getGenericResult, UNIQUE} from '../helpers';
+import collectionHelpersAbi from '../../eth/collectionHelpersAbi.json';
+import fungibleAbi from '../../eth/fungibleAbi.json';
+import nonFungibleAbi from '../../eth/nonFungibleAbi.json';
+import refungibleAbi from '../../eth/reFungibleAbi.json';
+import refungibleTokenAbi from '../../eth/reFungibleTokenAbi.json';
+import contractHelpersAbi from '../../eth/util/contractHelpersAbi.json';
+
+export const GAS_ARGS = {gas: 2500000};
+
+export enum SponsoringMode {
+  Disabled = 0,
+  Allowlisted = 1,
+  Generous = 2,
+}
+
+let web3Connected = false;
+export async function usingWeb3<T>(cb: (web3: Web3) => Promise<T> | T): Promise<T> {
+  if (web3Connected) throw new Error('do not nest usingWeb3 calls');
+  web3Connected = true;
+
+  const provider = new Web3.providers.WebsocketProvider(config.substrateUrl);
+  const web3 = new Web3(provider);
+
+  try {
+    return await cb(web3);
+  } finally {
+    // provider.disconnect(3000, 'normal disconnect');
+    provider.connection.close();
+    web3Connected = false;
+  }
+}
+
+function encodeIntBE(v: number): number[] {
+  if (v >= 0xffffffff || v < 0) throw new Error('id overflow');
+  return [
+    v >> 24,
+    (v >> 16) & 0xff,
+    (v >> 8) & 0xff,
+    v & 0xff,
+  ];
+}
+
+export async function getCollectionAddressFromResult(api: ApiPromise, result: any) {
+  const collectionIdAddress = normalizeAddress(result.events.CollectionCreated.returnValues.collectionId);
+  const collectionId = collectionIdFromAddress(collectionIdAddress);  
+  const collection = (await getDetailedCollectionInfo(api, collectionId))!;
+  return {collectionIdAddress, collectionId, collection};
+}
+
+export function collectionIdToAddress(collection: number): string {
+  const buf = Buffer.from([0x17, 0xc4, 0xe6, 0x45, 0x3c, 0xc4, 0x9a, 0xaa, 0xae, 0xac, 0xa8, 0x94, 0xe6, 0xd9, 0x68, 0x3e,
+    ...encodeIntBE(collection),
+  ]);
+  return Web3.utils.toChecksumAddress('0x' + buf.toString('hex'));
+}
+export function collectionIdFromAddress(address: string): number {
+  if (!address.startsWith('0x'))
+    throw 'address not starts with "0x"';
+  if (address.length > 42)
+    throw 'address length is more than 20 bytes';
+  return Number('0x' + address.substring(address.length - 8));
+}
+  
+export function normalizeAddress(address: string): string {
+  return '0x' + address.substring(address.length - 40);
+}
+
+export function tokenIdToAddress(collection: number, token: number): string {
+  const buf = Buffer.from([0xf8, 0x23, 0x8c, 0xcf, 0xff, 0x8e, 0xd8, 0x87, 0x46, 0x3f, 0xd5, 0xe0,
+    ...encodeIntBE(collection),
+    ...encodeIntBE(token),
+  ]);
+  return Web3.utils.toChecksumAddress('0x' + buf.toString('hex'));
+}
+
+export function tokenIdFromAddress(address: string) {
+  if (!address.startsWith('0x'))
+    throw 'address not starts with "0x"';
+  if (address.length > 42)
+    throw 'address length is more than 20 bytes';
+  return {
+    collectionId: Number('0x' + address.substring(address.length - 16, address.length - 8)),
+    tokenId: Number('0x' + address.substring(address.length - 8)),
+  };
+}
+
+export function tokenIdToCross(collection: number, token: number): CrossAccountId {
+  return {
+    Ethereum: tokenIdToAddress(collection, token),
+  };
+}
+
+export function createEthAccount(web3: Web3) {
+  const account = web3.eth.accounts.create();
+  web3.eth.accounts.wallet.add(account.privateKey);
+  return account.address;
+}
+
+export async function createEthAccountWithBalance(api: ApiPromise, web3: Web3, privateKeyWrapper: (account: string) => IKeyringPair) {
+  const alice = privateKeyWrapper('//Alice');
+  const account = createEthAccount(web3);
+  await transferBalanceToEth(api, alice, account);
+
+  return account;
+}
+
+export async function transferBalanceToEth(api: ApiPromise, source: IKeyringPair, target: string, amount = 1000n * UNIQUE) {
+  const tx = api.tx.balances.transfer(evmToAddress(target), amount);
+  const events = await submitTransactionAsync(source, tx);
+  const result = getGenericResult(events);
+  expect(result.success).to.be.true;
+}
+
+export async function createRFTCollection(api: ApiPromise, web3: Web3, owner: string) {
+  const collectionHelper = evmCollectionHelpers(web3, owner);
+  const result = await collectionHelper.methods
+    .createRFTCollection('A', 'B', 'C')
+    .send({value: Number(2n * UNIQUE)});
+  return await getCollectionAddressFromResult(api, result);
+}
+
+
+export async function createNonfungibleCollection(api: ApiPromise, web3: Web3, owner: string) {
+  const collectionHelper = evmCollectionHelpers(web3, owner);
+  const result = await collectionHelper.methods
+    .createNonfungibleCollection('A', 'B', 'C')
+    .send({value: Number(2n * UNIQUE)});
+  return await getCollectionAddressFromResult(api, result);
+}
+
+export function uniqueNFT(web3: Web3, address: string, owner: string) {
+  return new web3.eth.Contract(nonFungibleAbi as any, address, {
+    from: owner,
+    ...GAS_ARGS,
+  });
+}
+
+export function uniqueRefungible(web3: Web3, collectionAddress: string, owner: string) {
+  return new web3.eth.Contract(refungibleAbi as any, collectionAddress, {
+    from: owner,
+    ...GAS_ARGS,
+  });
+}
+
+export function uniqueRefungibleToken(web3: Web3, tokenAddress: string, owner: string | undefined = undefined) {
+  return new web3.eth.Contract(refungibleTokenAbi as any, tokenAddress, {
+    from: owner,
+    ...GAS_ARGS,
+  });
+}
+
+export async function itWeb3(name: string, cb: (apis: { web3: Web3, api: ApiPromise, privateKeyWrapper: (account: string) => IKeyringPair }) => any, opts: { only?: boolean, skip?: boolean } = {}) {
+  let i: any = it;
+  if (opts.only) i = i.only;
+  else if (opts.skip) i = i.skip;
+  i(name, async () => {
+    await usingApi(async (api, privateKeyWrapper) => {
+      await usingWeb3(async web3 => {
+        await cb({api, web3, privateKeyWrapper});
+      });
+    });
+  });
+}
+itWeb3.only = (name: string, cb: (apis: { web3: Web3, api: ApiPromise, privateKeyWrapper: (account: string) => IKeyringPair }) => any) => itWeb3(name, cb, {only: true});
+itWeb3.skip = (name: string, cb: (apis: { web3: Web3, api: ApiPromise, privateKeyWrapper: (account: string) => IKeyringPair }) => any) => itWeb3(name, cb, {skip: true});
+
+export async function generateSubstrateEthPair(web3: Web3) {
+  const account = web3.eth.accounts.create();
+  evmToAddress(account.address);
+}
+
+type NormalizedEvent = {
+    address: string,
+    event: string,
+    args: { [key: string]: string }
+};
+
+export function normalizeEvents(events: any): NormalizedEvent[] {
+  const output = [];
+  for (const key of Object.keys(events)) {
+    if (key.match(/^[0-9]+$/)) {
+      output.push(events[key]);
+    } else if (Array.isArray(events[key])) {
+      output.push(...events[key]);
+    } else {
+      output.push(events[key]);
+    }
+  }
+  output.sort((a, b) => a.logIndex - b.logIndex);
+  return output.map(({address, event, returnValues}) => {
+    const args: { [key: string]: string } = {};
+    for (const key of Object.keys(returnValues)) {
+      if (!key.match(/^[0-9]+$/)) {
+        args[key] = returnValues[key];
+      }
+    }
+    return {
+      address,
+      event,
+      args,
+    };
+  });
+}
+
+export async function recordEvents(contract: any, action: () => Promise<void>): Promise<NormalizedEvent[]> {
+  const out: any = [];
+  contract.events.allEvents((_: any, event: any) => {
+    out.push(event);
+  });
+  await action();
+  return normalizeEvents(out);
+}
+
+export function subToEthLowercase(eth: string): string {
+  const bytes = addressToEvm(eth);
+  return '0x' + Buffer.from(bytes).toString('hex');
+}
+
+export function subToEth(eth: string): string {
+  return Web3.utils.toChecksumAddress(subToEthLowercase(eth));
+}
+
+export interface CompiledContract {
+  abi: any,
+  object: string,
+}
+
+export function compileContract(name: string, src: string) : CompiledContract {
+  const out = JSON.parse(solc.compile(JSON.stringify({
+    language: 'Solidity',
+    sources: {
+      [`${name}.sol`]: {
+        content: `
+          // SPDX-License-Identifier: UNLICENSED
+          pragma solidity ^0.8.6;
+
+          ${src}
+        `,
+      },
+    },
+    settings: {
+      outputSelection: {
+        '*': {
+          '*': ['*'],
+        },
+      },
+    },
+  }))).contracts[`${name}.sol`][name];
+
+  return {
+    abi: out.abi,
+    object: '0x' + out.evm.bytecode.object,
+  };
+}
+
+export async function deployFlipper(web3: Web3, deployer: string) {
+  const compiled = compileContract('Flipper', `
+    contract Flipper {
+      bool value = false;
+      function flip() public {
+        value = !value;
+      }
+      function getValue() public view returns (bool) {
+        return value;
+      }
+    }
+  `);
+  const flipperContract = new web3.eth.Contract(compiled.abi, undefined, {
+    data: compiled.object,
+    from: deployer,
+    ...GAS_ARGS,
+  });
+  const flipper = await flipperContract.deploy({data: compiled.object}).send({from: deployer});
+
+  return flipper;
+}
+
+export async function deployCollector(web3: Web3, deployer: string) {
+  const compiled = compileContract('Collector', `
+    contract Collector {
+      uint256 collected;
+      fallback() external payable {
+        giveMoney();
+      }
+      function giveMoney() public payable {
+        collected += msg.value;
+      }
+      function getCollected() public view returns (uint256) {
+        return collected;
+      }
+      function getUnaccounted() public view returns (uint256) {
+        return address(this).balance - collected;
+      }
+
+      function withdraw(address payable target) public {
+        target.transfer(collected);
+        collected = 0;
+      }
+    }
+  `);
+  const collectorContract = new web3.eth.Contract(compiled.abi, undefined, {
+    data: compiled.object,
+    from: deployer,
+    ...GAS_ARGS,
+  });
+  const collector = await collectorContract.deploy({data: compiled.object}).send({from: deployer});
+
+  return collector;
+}
+
+/** 
+ * pallet evm_contract_helpers
+ * @param web3 
+ * @param caller - eth address
+ * @returns 
+ */
+export function contractHelpers(web3: Web3, caller: string) {
+  return new web3.eth.Contract(contractHelpersAbi as any, '0x842899ECF380553E8a4de75bF534cdf6fBF64049', {from: caller, ...GAS_ARGS});
+}
+
+/** 
+ * evm collection helper
+ * @param web3 
+ * @param caller - eth address
+ * @returns 
+ */
+export function evmCollectionHelpers(web3: Web3, caller: string) {
+  return new web3.eth.Contract(collectionHelpersAbi as any, '0x6c4e9fe1ae37a41e93cee429e8e1881abdcbb54f', {from: caller, ...GAS_ARGS});
+}
+
+/** 
+ * evm collection
+ * @param web3 
+ * @param caller - eth address
+ * @returns 
+ */
+export function evmCollection(web3: Web3, caller: string, collection: string, mode: CollectionMode = {type: 'NFT'}) {
+  let abi;
+  switch (mode.type) {
+    case 'Fungible':
+      abi = fungibleAbi;
+      break;
+    
+    case 'NFT':
+      abi = nonFungibleAbi;
+      break;
+    
+    case 'ReFungible':
+      abi = refungibleAbi;
+      break;
+
+    default:
+      throw 'Bad collection mode';
+  }
+  const contract = new web3.eth.Contract(abi as any, collection, {from: caller, ...GAS_ARGS});
+  return contract;
+}
+
+/**
+ * Execute ethereum method call using substrate account
+ * @param to target contract
+ * @param mkTx - closure, receiving `contract.methods`, and returning method call,
+ * to be used as following (assuming `to` = erc20 contract):
+ * `m => m.transfer(to, amount)`
+ *
+ * # Example
+ * ```ts
+ * executeEthTxOnSub(api, alice, erc20Contract, m => m.transfer(target, amount));
+ * ```
+ */
+export async function executeEthTxOnSub(web3: Web3, api: ApiPromise, from: IKeyringPair, to: any, mkTx: (methods: any) => any, {value = 0}: {value?: bigint | number} = { }) {
+  const tx = api.tx.evm.call(
+    subToEth(from.address),
+    to.options.address,
+    mkTx(to.methods).encodeABI(),
+    value,
+    GAS_ARGS.gas,
+    await web3.eth.getGasPrice(),
+    null,
+    null,
+    [],
+  );
+  const events = await submitTransactionAsync(from, tx);
+  expect(events.some(({event: {section, method}}) => section == 'evm' && method == 'Executed')).to.be.true;
+}
+
+export async function ethBalanceViaSub(api: ApiPromise, address: string): Promise<bigint> {
+  return (await getBalance(api, [evmToAddress(address)]))[0];
+}
+
+/**
+ * Measure how much gas given closure consumes
+ *
+ * @param user which user balance will be checked
+ */
+export async function recordEthFee(api: ApiPromise, user: string, call: () => Promise<any>): Promise<bigint> {
+  const before = await ethBalanceViaSub(api, user);
+
+  await call();
+
+  // In dev mode, the transaction might not finish processing in time
+  await waitNewBlocks(api, 1);
+  const after = await ethBalanceViaSub(api, user);
+
+  // Can't use .to.be.less, because chai doesn't supports bigint
+  expect(after < before).to.be.true;
+
+  return before - after;
+}
+
+type ElementOf<A> = A extends readonly (infer T)[] ? T : never;
+// I want a fancier api, not a memory efficiency
+export function* cartesian<T extends Array<Array<any>>, R extends Array<any>>(internalRest: [...R], ...args: [...T]): Generator<[...R, ...{[K in keyof T]: ElementOf<T[K]>}]> {
+  if(args.length === 0) {
+    yield internalRest as any;
+    return;
+  }
+  for(const value of args[0]) {
+    yield* cartesian([...internalRest, value], ...args.slice(1)) as any;
+  }
+}
\ No newline at end of file
addedtests/src/deprecated-helpers/helpers.tsdiffbeforeafterboth
--- /dev/null
+++ b/tests/src/deprecated-helpers/helpers.ts
@@ -0,0 +1,1879 @@
+// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.
+// This file is part of Unique Network.
+
+// Unique Network is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Unique Network is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
+
+import '../interfaces/augment-api-rpc';
+import '../interfaces/augment-api-query';
+import {ApiPromise, Keyring} from '@polkadot/api';
+import type {AccountId, EventRecord, Event, BlockNumber} from '@polkadot/types/interfaces';
+import type {GenericEventData} from '@polkadot/types';
+import {AnyTuple, IEvent, IKeyringPair} from '@polkadot/types/types';
+import {evmToAddress} from '@polkadot/util-crypto';
+import {AnyNumber} from '@polkadot/types-codec/types';
+import BN from 'bn.js';
+import chai from 'chai';
+import chaiAsPromised from 'chai-as-promised';
+import {default as usingApi, executeTransaction, submitTransactionAsync, submitTransactionExpectFailAsync} from '../substrate/substrate-api';
+import {hexToStr, strToUTF16, utf16ToStr} from './util';
+import {UpDataStructsRpcCollection, UpDataStructsCreateItemData, UpDataStructsProperty} from '@polkadot/types/lookup';
+import {UpDataStructsTokenChild} from '../interfaces';
+import {Context} from 'mocha';
+
+chai.use(chaiAsPromised);
+const expect = chai.expect;
+
+export type CrossAccountId = {
+  Substrate: string,
+} | {
+  Ethereum: string,
+};
+
+
+export enum Pallets {
+  Inflation = 'inflation',
+  RmrkCore = 'rmrkcore',
+  RmrkEquip = 'rmrkequip',
+  ReFungible = 'refungible',
+  Fungible = 'fungible',
+  NFT = 'nonfungible',
+  Scheduler = 'scheduler',
+  AppPromotion = 'apppromotion',
+}
+
+export async function isUnique(): Promise<boolean> {
+  return usingApi(async api => {
+    const chain = await api.rpc.system.chain();
+
+    return chain.eq('UNIQUE');
+  });
+}
+
+export async function isQuartz(): Promise<boolean> {
+  return usingApi(async api => {
+    const chain = await api.rpc.system.chain();
+
+    return chain.eq('QUARTZ');
+  });
+}
+
+let modulesNames: any;
+export function getModuleNames(api: ApiPromise): string[] {
+  if (typeof modulesNames === 'undefined')
+    modulesNames = api.runtimeMetadata.asLatest.pallets.map(m => m.name.toString().toLowerCase());
+  return modulesNames;
+}
+
+export async function missingRequiredPallets(requiredPallets: string[]): Promise<string[]> {
+  return await usingApi(async api => {
+    const pallets = getModuleNames(api);
+
+    return requiredPallets.filter(p => !pallets.includes(p));
+  });
+}
+
+export async function checkPalletsPresence(requiredPallets: string[]): Promise<boolean> {
+  return (await missingRequiredPallets(requiredPallets)).length == 0;
+}
+
+export async function requirePallets(mocha: Context, requiredPallets: string[]) {
+  const missingPallets = await missingRequiredPallets(requiredPallets);
+
+  if (missingPallets.length > 0) {
+    const skippingTestMsg = `\tSkipping test "${mocha.test?.title}".`;
+    const missingPalletsMsg = `\tThe following pallets are missing:\n\t- ${missingPallets.join('\n\t- ')}`;
+    const skipMsg = `${skippingTestMsg}\n${missingPalletsMsg}`;
+
+    console.error('\x1b[38:5:208m%s\x1b[0m', skipMsg);
+
+    mocha.skip();
+  }
+}
+
+export function bigIntToSub(api: ApiPromise, number: bigint) {
+  return api.registry.createType('AccountId', '0x' + number.toString(16).padStart(64, '0')).toJSON();
+}
+
+export function bigIntToDecimals(number: bigint, decimals = 18): string {
+  const numberStr = number.toString();
+  const dotPos = numberStr.length - decimals;
+
+  if (dotPos <= 0) {
+    return '0.' + '0'.repeat(Math.abs(dotPos)) + numberStr;
+  } else {
+    const intPart = numberStr.substring(0, dotPos);
+    const fractPart = numberStr.substring(dotPos);
+    return intPart + '.' + fractPart;
+  }
+}
+
+export function normalizeAccountId(input: string | AccountId | CrossAccountId | IKeyringPair): CrossAccountId {
+  if (typeof input === 'string') {
+    if (input.length >= 47) {
+      return {Substrate: input};
+    } else if (input.length === 42 && input.startsWith('0x')) {
+      return {Ethereum: input.toLowerCase()};
+    } else if (input.length === 40 && !input.startsWith('0x')) {
+      return {Ethereum: '0x' + input.toLowerCase()};
+    } else {
+      throw new Error(`Unknown address format: "${input}"`);
+    }
+  }
+  if ('address' in input) {
+    return {Substrate: input.address};
+  }
+  if ('Ethereum' in input) {
+    return {
+      Ethereum: input.Ethereum.toLowerCase(),
+    };
+  } else if ('ethereum' in input) {
+    return {
+      Ethereum: (input as any).ethereum.toLowerCase(),
+    };
+  } else if ('Substrate' in input) {
+    return input;
+  } else if ('substrate' in input) {
+    return {
+      Substrate: (input as any).substrate,
+    };
+  }
+
+  // AccountId
+  return {Substrate: input.toString()};
+}
+export function toSubstrateAddress(input: string | CrossAccountId | IKeyringPair): string {
+  input = normalizeAccountId(input);
+  if ('Substrate' in input) {
+    return input.Substrate;
+  } else {
+    return evmToAddress(input.Ethereum);
+  }
+}
+
+export const U128_MAX = (1n << 128n) - 1n;
+
+const MICROUNIQUE = 1_000_000_000_000n;
+const MILLIUNIQUE = 1_000n * MICROUNIQUE;
+const CENTIUNIQUE = 10n * MILLIUNIQUE;
+export const UNIQUE = 100n * CENTIUNIQUE;
+
+interface GenericResult<T> {
+  success: boolean;
+  data: T | null;
+}
+
+interface CreateCollectionResult {
+  success: boolean;
+  collectionId: number;
+}
+
+interface CreateItemResult {
+  success: boolean;
+  collectionId: number;
+  itemId: number;
+  recipient?: CrossAccountId;
+  amount?: number;
+}
+
+interface DestroyItemResult {
+  success: boolean;
+  collectionId: number;
+  itemId: number;
+  owner: CrossAccountId;
+  amount: number;
+}
+
+interface TransferResult {
+  collectionId: number;
+  itemId: number;
+  sender?: CrossAccountId;
+  recipient?: CrossAccountId;
+  value: bigint;
+}
+
+interface IReFungibleOwner {
+  fraction: BN;
+  owner: number[];
+}
+
+interface IGetMessage {
+  checkMsgUnqMethod: string;
+  checkMsgTrsMethod: string;
+  checkMsgSysMethod: string;
+}
+
+export interface IFungibleTokenDataType {
+  value: number;
+}
+
+export interface IChainLimits {
+  collectionNumbersLimit: number;
+  accountTokenOwnershipLimit: number;
+  collectionsAdminsLimit: number;
+  customDataLimit: number;
+  nftSponsorTransferTimeout: number;
+  fungibleSponsorTransferTimeout: number;
+  refungibleSponsorTransferTimeout: number;
+  //offchainSchemaLimit: number;
+  //constOnChainSchemaLimit: number;
+}
+
+export interface IReFungibleTokenDataType {
+  owner: IReFungibleOwner[];
+}
+
+export function uniqueEventMessage(events: EventRecord[]): IGetMessage {
+  let checkMsgUnqMethod = '';
+  let checkMsgTrsMethod = '';
+  let checkMsgSysMethod = '';
+  events.forEach(({event: {method, section}}) => {
+    if (section === 'common') {
+      checkMsgUnqMethod = method;
+    } else if (section === 'treasury') {
+      checkMsgTrsMethod = method;
+    } else if (section === 'system') {
+      checkMsgSysMethod = method;
+    } else { return null; }
+  });
+  const result: IGetMessage = {
+    checkMsgUnqMethod,
+    checkMsgTrsMethod,
+    checkMsgSysMethod,
+  };
+  return result;
+}
+
+export function getEvent<T extends Event>(events: EventRecord[], check: (event: IEvent<AnyTuple>) => event is T): T | undefined {
+  const event = events.find(r => check(r.event));
+  if (!event) return;
+  return event.event as T;
+}
+
+export function getGenericResult<T>(events: EventRecord[]): GenericResult<T>;
+export function getGenericResult<T>(
+  events: EventRecord[],
+  expectSection: string,
+  expectMethod: string,
+  extractAction: (data: GenericEventData) => T
+): GenericResult<T>;
+
+export function getGenericResult<T>(
+  events: EventRecord[],
+  expectSection?: string,
+  expectMethod?: string,
+  extractAction?: (data: GenericEventData) => T,
+): GenericResult<T> {
+  let success = false;
+  let successData = null;
+
+  events.forEach(({event: {data, method, section}}) => {
+    // console.log(`    ${phase}: ${section}.${method}:: ${data}`);
+    if (method === 'ExtrinsicSuccess') {
+      success = true;
+    } else if ((expectSection == section) && (expectMethod == method)) {
+      successData = extractAction!(data as any);
+    }
+  });
+
+  const result: GenericResult<T> = {
+    success,
+    data: successData,
+  };
+  return result;
+}
+
+export function getCreateCollectionResult(events: EventRecord[]): CreateCollectionResult {
+  const genericResult = getGenericResult(events, 'common', 'CollectionCreated', (data) => parseInt(data[0].toString(), 10));
+  const result: CreateCollectionResult = {
+    success: genericResult.success,
+    collectionId: genericResult.data ?? 0,
+  };
+  return result;
+}
+
+export function getCreateItemsResult(events: EventRecord[]): CreateItemResult[] {
+  const results: CreateItemResult[] = [];
+
+  const genericResult = getGenericResult<CreateItemResult[]>(events, 'common', 'ItemCreated', (data) => {
+    const collectionId = parseInt(data[0].toString(), 10);
+    const itemId = parseInt(data[1].toString(), 10);
+    const recipient = normalizeAccountId(data[2].toJSON() as any);
+    const amount = parseInt(data[3].toString(), 10);
+
+    const itemRes: CreateItemResult = {
+      success: true,
+      collectionId,
+      itemId,
+      recipient,
+      amount,
+    };
+
+    results.push(itemRes);
+    return results;
+  });
+
+  if (!genericResult.success) return [];
+  return results;
+}
+
+export function getCreateItemResult(events: EventRecord[]): CreateItemResult {
+  const genericResult = getGenericResult(events, 'common', 'ItemCreated', (data) => data.map(function(value) { return value.toJSON(); }));
+
+  if (genericResult.data == null)
+    return {
+      success: genericResult.success,
+      collectionId: 0,
+      itemId: 0,
+      amount: 0,
+    };
+  else
+    return {
+      success: genericResult.success,
+      collectionId: genericResult.data[0] as number,
+      itemId: genericResult.data[1] as number,
+      recipient: normalizeAccountId(genericResult.data![2] as any),
+      amount: genericResult.data[3] as number,
+    };
+}
+
+export function getDestroyItemsResult(events: EventRecord[]): DestroyItemResult[] {
+  const results: DestroyItemResult[] = [];
+
+  const genericResult = getGenericResult<DestroyItemResult[]>(events, 'common', 'ItemDestroyed', (data) => {
+    const collectionId = parseInt(data[0].toString(), 10);
+    const itemId = parseInt(data[1].toString(), 10);
+    const owner = normalizeAccountId(data[2].toJSON() as any);
+    const amount = parseInt(data[3].toString(), 10);
+
+    const itemRes: DestroyItemResult = {
+      success: true,
+      collectionId,
+      itemId,
+      owner,
+      amount,
+    };
+
+    results.push(itemRes);
+    return results;
+  });
+
+  if (!genericResult.success) return [];
+  return results;
+}
+
+export function getTransferResult(api: ApiPromise, events: EventRecord[]): TransferResult {
+  for (const {event} of events) {
+    if (api.events.common.Transfer.is(event)) {
+      const [collection, token, sender, recipient, value] = event.data;
+      return {
+        collectionId: collection.toNumber(),
+        itemId: token.toNumber(),
+        sender: normalizeAccountId(sender.toJSON() as any),
+        recipient: normalizeAccountId(recipient.toJSON() as any),
+        value: value.toBigInt(),
+      };
+    }
+  }
+  throw new Error('no transfer event');
+}
+
+interface Nft {
+  type: 'NFT';
+}
+
+interface Fungible {
+  type: 'Fungible';
+  decimalPoints: number;
+}
+
+interface ReFungible {
+  type: 'ReFungible';
+}
+
+export type CollectionMode = Nft | Fungible | ReFungible;
+
+export type Property = {
+  key: any,
+  value: any,
+};
+
+type Permission = {
+  mutable: boolean;
+  collectionAdmin: boolean;
+  tokenOwner: boolean;
+}
+
+type PropertyPermission = {
+  key: any;
+  permission: Permission;
+}
+
+export type CreateCollectionParams = {
+  mode: CollectionMode,
+  name: string,
+  description: string,
+  tokenPrefix: string,
+  properties?: Array<Property>,
+  propPerm?: Array<PropertyPermission>
+};
+
+const defaultCreateCollectionParams: CreateCollectionParams = {
+  description: 'description',
+  mode: {type: 'NFT'},
+  name: 'name',
+  tokenPrefix: 'prefix',
+};
+
+export async function
+createCollection(
+  api: ApiPromise,
+  sender: IKeyringPair,
+  params: Partial<CreateCollectionParams> = {},
+): Promise<CreateCollectionResult> {
+  const {name, description, mode, tokenPrefix} = {...defaultCreateCollectionParams, ...params};
+
+  let modeprm = {};
+  if (mode.type === 'NFT') {
+    modeprm = {nft: null};
+  } else if (mode.type === 'Fungible') {
+    modeprm = {fungible: mode.decimalPoints};
+  } else if (mode.type === 'ReFungible') {
+    modeprm = {refungible: null};
+  }
+
+  const tx = api.tx.unique.createCollectionEx({
+    name: strToUTF16(name),
+    description: strToUTF16(description),
+    tokenPrefix: strToUTF16(tokenPrefix),
+    mode: modeprm as any,
+  });
+  const events = await executeTransaction(api, sender, tx);
+  return getCreateCollectionResult(events);
+}
+
+export async function createCollectionExpectSuccess(params: Partial<CreateCollectionParams> = {}): Promise<number> {
+  const {name, description, mode, tokenPrefix} = {...defaultCreateCollectionParams, ...params};
+
+  let collectionId = 0;
+  await usingApi(async (api, privateKeyWrapper) => {
+    // Get number of collections before the transaction
+    const collectionCountBefore = await getCreatedCollectionCount(api);
+
+    // Run the CreateCollection transaction
+    const alicePrivateKey = privateKeyWrapper('//Alice');
+
+    const result = await createCollection(api, alicePrivateKey, params);
+
+    // Get number of collections after the transaction
+    const collectionCountAfter = await getCreatedCollectionCount(api);
+
+    // Get the collection
+    const collection = await queryCollectionExpectSuccess(api, result.collectionId);
+
+    // What to expect
+    // tslint:disable-next-line:no-unused-expression
+    expect(result.success).to.be.true;
+    expect(result.collectionId).to.be.equal(collectionCountAfter);
+    // tslint:disable-next-line:no-unused-expression
+    expect(collection).to.be.not.null;
+    expect(collectionCountAfter).to.be.equal(collectionCountBefore + 1, 'Error: NFT collection NOT created.');
+    expect(collection.owner.toString()).to.be.equal(toSubstrateAddress(alicePrivateKey));
+    expect(utf16ToStr(collection.name.toJSON() as any)).to.be.equal(name);
+    expect(utf16ToStr(collection.description.toJSON() as any)).to.be.equal(description);
+    expect(hexToStr(collection.tokenPrefix.toJSON())).to.be.equal(tokenPrefix);
+
+    collectionId = result.collectionId;
+  });
+
+  return collectionId;
+}
+
+export async function createCollectionWithPropsExpectSuccess(params: Partial<CreateCollectionParams> = {}): Promise<number> {
+  const {name, description, mode, tokenPrefix} = {...defaultCreateCollectionParams, ...params};
+
+  let collectionId = 0;
+  await usingApi(async (api, privateKeyWrapper) => {
+    // Get number of collections before the transaction
+    const collectionCountBefore = await getCreatedCollectionCount(api);
+
+    // Run the CreateCollection transaction
+    const alicePrivateKey = privateKeyWrapper('//Alice');
+
+    let modeprm = {};
+    if (mode.type === 'NFT') {
+      modeprm = {nft: null};
+    } else if (mode.type === 'Fungible') {
+      modeprm = {fungible: mode.decimalPoints};
+    } else if (mode.type === 'ReFungible') {
+      modeprm = {refungible: null};
+    }
+
+    const tx = api.tx.unique.createCollectionEx({name: strToUTF16(name), description: strToUTF16(description), tokenPrefix: strToUTF16(tokenPrefix), mode: modeprm as any, properties: params.properties, tokenPropertyPermissions: params.propPerm});
+    const events = await submitTransactionAsync(alicePrivateKey, tx);
+    const result = getCreateCollectionResult(events);
+
+    // Get number of collections after the transaction
+    const collectionCountAfter = await getCreatedCollectionCount(api);
+
+    // Get the collection
+    const collection = await queryCollectionExpectSuccess(api, result.collectionId);
+
+    // What to expect
+    // tslint:disable-next-line:no-unused-expression
+    expect(result.success).to.be.true;
+    expect(result.collectionId).to.be.equal(collectionCountAfter);
+    // tslint:disable-next-line:no-unused-expression
+    expect(collection).to.be.not.null;
+    expect(collectionCountAfter).to.be.equal(collectionCountBefore + 1, 'Error: NFT collection NOT created.');
+    expect(collection.owner.toString()).to.be.equal(toSubstrateAddress(alicePrivateKey));
+    expect(utf16ToStr(collection.name.toJSON() as any)).to.be.equal(name);
+    expect(utf16ToStr(collection.description.toJSON() as any)).to.be.equal(description);
+    expect(hexToStr(collection.tokenPrefix.toJSON())).to.be.equal(tokenPrefix);
+
+
+    collectionId = result.collectionId;
+  });
+
+  return collectionId;
+}
+
+export async function createCollectionWithPropsExpectFailure(params: Partial<CreateCollectionParams> = {}) {
+  const {name, description, mode, tokenPrefix} = {...defaultCreateCollectionParams, ...params};
+
+  await usingApi(async (api, privateKeyWrapper) => {
+    // Get number of collections before the transaction
+    const collectionCountBefore = await getCreatedCollectionCount(api);
+
+    // Run the CreateCollection transaction
+    const alicePrivateKey = privateKeyWrapper('//Alice');
+
+    let modeprm = {};
+    if (mode.type === 'NFT') {
+      modeprm = {nft: null};
+    } else if (mode.type === 'Fungible') {
+      modeprm = {fungible: mode.decimalPoints};
+    } else if (mode.type === 'ReFungible') {
+      modeprm = {refungible: null};
+    }
+
+    const tx = api.tx.unique.createCollectionEx({name: strToUTF16(name), description: strToUTF16(description), tokenPrefix: strToUTF16(tokenPrefix), mode: modeprm as any, properties: params.properties, tokenPropertyPermissions: params.propPerm});
+    await expect(submitTransactionExpectFailAsync(alicePrivateKey, tx)).to.be.rejected;
+
+
+    // Get number of collections after the transaction
+    const collectionCountAfter = await getCreatedCollectionCount(api);
+
+    expect(collectionCountAfter).to.be.equal(collectionCountBefore, 'Error: Collection with incorrect data created.');
+  });
+}
+
+export async function createCollectionExpectFailure(params: Partial<CreateCollectionParams> = {}) {
+  const {name, description, mode, tokenPrefix} = {...defaultCreateCollectionParams, ...params};
+
+  let modeprm = {};
+  if (mode.type === 'NFT') {
+    modeprm = {nft: null};
+  } else if (mode.type === 'Fungible') {
+    modeprm = {fungible: mode.decimalPoints};
+  } else if (mode.type === 'ReFungible') {
+    modeprm = {refungible: null};
+  }
+
+  await usingApi(async (api, privateKeyWrapper) => {
+    // Get number of collections before the transaction
+    const collectionCountBefore = await getCreatedCollectionCount(api);
+
+    // Run the CreateCollection transaction
+    const alicePrivateKey = privateKeyWrapper('//Alice');
+    const tx = api.tx.unique.createCollectionEx({name: strToUTF16(name), description: strToUTF16(description), tokenPrefix: strToUTF16(tokenPrefix), mode: modeprm as any});
+    await expect(submitTransactionExpectFailAsync(alicePrivateKey, tx)).to.be.rejected;
+
+    // Get number of collections after the transaction
+    const collectionCountAfter = await getCreatedCollectionCount(api);
+
+    // What to expect
+    expect(collectionCountAfter).to.be.equal(collectionCountBefore, 'Error: Collection with incorrect data created.');
+  });
+}
+
+export async function findUnusedAddress(api: ApiPromise, privateKeyWrapper: (account: string) => IKeyringPair, seedAddition = ''): Promise<IKeyringPair> {
+  let bal = 0n;
+  let unused;
+  do {
+    const randomSeed = 'seed' + Math.floor(Math.random() * Math.floor(10000)) + seedAddition;
+    unused = privateKeyWrapper(`//${randomSeed}`);
+    bal = (await api.query.system.account(unused.address)).data.free.toBigInt();
+  } while (bal !== 0n);
+  return unused;
+}
+
+export async function getAllowance(api: ApiPromise, collectionId: number, owner: CrossAccountId | string | IKeyringPair, approved: CrossAccountId | string | IKeyringPair, tokenId: number) {
+  return (await api.rpc.unique.allowance(collectionId, normalizeAccountId(owner), normalizeAccountId(approved), tokenId)).toBigInt();
+}
+
+export function findUnusedAddresses(api: ApiPromise, privateKeyWrapper: (account: string) => IKeyringPair, amount: number): Promise<IKeyringPair[]> {
+  return Promise.all(new Array(amount).fill(null).map(() => findUnusedAddress(api, privateKeyWrapper, '_' + Date.now())));
+}
+
+export async function findNotExistingCollection(api: ApiPromise): Promise<number> {
+  const totalNumber = await getCreatedCollectionCount(api);
+  const newCollection: number = totalNumber + 1;
+  return newCollection;
+}
+
+function getDestroyResult(events: EventRecord[]): boolean {
+  let success = false;
+  events.forEach(({event: {method}}) => {
+    if (method == 'ExtrinsicSuccess') {
+      success = true;
+    }
+  });
+  return success;
+}
+
+export async function destroyCollectionExpectFailure(collectionId: number, senderSeed = '//Alice') {
+  await usingApi(async (api, privateKeyWrapper) => {
+    // Run the DestroyCollection transaction
+    const alicePrivateKey = privateKeyWrapper(senderSeed);
+    const tx = api.tx.unique.destroyCollection(collectionId);
+    await expect(submitTransactionExpectFailAsync(alicePrivateKey, tx)).to.be.rejected;
+  });
+}
+
+export async function destroyCollectionExpectSuccess(collectionId: number, senderSeed = '//Alice') {
+  await usingApi(async (api, privateKeyWrapper) => {
+    // Run the DestroyCollection transaction
+    const alicePrivateKey = privateKeyWrapper(senderSeed);
+    const tx = api.tx.unique.destroyCollection(collectionId);
+    const events = await submitTransactionAsync(alicePrivateKey, tx);
+    const result = getDestroyResult(events);
+    expect(result).to.be.true;
+
+    // What to expect
+    expect(await getDetailedCollectionInfo(api, collectionId)).to.be.null;
+  });
+}
+
+export async function setCollectionLimitsExpectSuccess(sender: IKeyringPair, collectionId: number, limits: any) {
+  await usingApi(async (api) => {
+    const tx = api.tx.unique.setCollectionLimits(collectionId, limits);
+    const events = await submitTransactionAsync(sender, tx);
+    const result = getGenericResult(events);
+
+    expect(result.success).to.be.true;
+  });
+}
+
+export const setCollectionPermissionsExpectSuccess = async (sender: IKeyringPair, collectionId: number, permissions: any) => {
+  await usingApi(async(api) => {
+    const tx = api.tx.unique.setCollectionPermissions(collectionId, permissions);
+    const events = await submitTransactionAsync(sender, tx);
+    const result = getGenericResult(events);
+
+    expect(result.success).to.be.true;
+  });
+};
+
+export async function setCollectionLimitsExpectFailure(sender: IKeyringPair, collectionId: number, limits: any) {
+  await usingApi(async (api) => {
+    const tx = api.tx.unique.setCollectionLimits(collectionId, limits);
+    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
+    const result = getGenericResult(events);
+
+    expect(result.success).to.be.false;
+  });
+}
+
+export async function setCollectionSponsorExpectSuccess(collectionId: number, sponsor: string, sender = '//Alice') {
+  await usingApi(async (api, privateKeyWrapper) => {
+
+    // Run the transaction
+    const senderPrivateKey = privateKeyWrapper(sender);
+    const tx = api.tx.unique.setCollectionSponsor(collectionId, sponsor);
+    const events = await submitTransactionAsync(senderPrivateKey, tx);
+    const result = getGenericResult(events);
+
+    // Get the collection
+    const collection = await queryCollectionExpectSuccess(api, collectionId);
+
+    // What to expect
+    expect(result.success).to.be.true;
+    expect(collection.sponsorship.toJSON()).to.deep.equal({
+      unconfirmed: sponsor,
+    });
+  });
+}
+
+export async function removeCollectionSponsorExpectSuccess(collectionId: number, sender = '//Alice') {
+  await usingApi(async (api, privateKeyWrapper) => {
+
+    // Run the transaction
+    const alicePrivateKey = privateKeyWrapper(sender);
+    const tx = api.tx.unique.removeCollectionSponsor(collectionId);
+    const events = await submitTransactionAsync(alicePrivateKey, tx);
+    const result = getGenericResult(events);
+
+    // Get the collection
+    const collection = await queryCollectionExpectSuccess(api, collectionId);
+
+    // What to expect
+    expect(result.success).to.be.true;
+    expect(collection.sponsorship.toJSON()).to.be.deep.equal({disabled: null});
+  });
+}
+
+export async function removeCollectionSponsorExpectFailure(collectionId: number, senderSeed = '//Alice') {
+  await usingApi(async (api, privateKeyWrapper) => {
+
+    // Run the transaction
+    const alicePrivateKey = privateKeyWrapper(senderSeed);
+    const tx = api.tx.unique.removeCollectionSponsor(collectionId);
+    await expect(submitTransactionExpectFailAsync(alicePrivateKey, tx)).to.be.rejected;
+  });
+}
+
+export async function setCollectionSponsorExpectFailure(collectionId: number, sponsor: string, senderSeed = '//Alice') {
+  await usingApi(async (api, privateKeyWrapper) => {
+
+    // Run the transaction
+    const alicePrivateKey = privateKeyWrapper(senderSeed);
+    const tx = api.tx.unique.setCollectionSponsor(collectionId, sponsor);
+    await expect(submitTransactionExpectFailAsync(alicePrivateKey, tx)).to.be.rejected;
+  });
+}
+
+export async function confirmSponsorshipExpectSuccess(collectionId: number, senderSeed = '//Alice') {
+  await usingApi(async (api, privateKeyWrapper) => {
+
+    // Run the transaction
+    const sender = privateKeyWrapper(senderSeed);
+    await confirmSponsorshipByKeyExpectSuccess(collectionId, sender);
+  });
+}
+
+export async function confirmSponsorshipByKeyExpectSuccess(collectionId: number, sender: IKeyringPair) {
+  await usingApi(async (api, privateKeyWrapper) => {
+
+    // Run the transaction
+    const tx = api.tx.unique.confirmSponsorship(collectionId);
+    const events = await submitTransactionAsync(sender, tx);
+    const result = getGenericResult(events);
+
+    // Get the collection
+    const collection = await queryCollectionExpectSuccess(api, collectionId);
+
+    // What to expect
+    expect(result.success).to.be.true;
+    expect(collection.sponsorship.toJSON()).to.be.deep.equal({
+      confirmed: sender.address,
+    });
+  });
+}
+
+
+export async function confirmSponsorshipExpectFailure(collectionId: number, senderSeed = '//Alice') {
+  await usingApi(async (api, privateKeyWrapper) => {
+
+    // Run the transaction
+    const sender = privateKeyWrapper(senderSeed);
+    const tx = api.tx.unique.confirmSponsorship(collectionId);
+    await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
+  });
+}
+
+export async function enableContractSponsoringExpectSuccess(sender: IKeyringPair, contractAddress: AccountId | string, enable: boolean) {
+  await usingApi(async (api) => {
+    const tx = api.tx.unique.enableContractSponsoring(contractAddress, enable);
+    const events = await submitTransactionAsync(sender, tx);
+    const result = getGenericResult(events);
+
+    expect(result.success).to.be.true;
+  });
+}
+
+export async function enableContractSponsoringExpectFailure(sender: IKeyringPair, contractAddress: AccountId | string, enable: boolean) {
+  await usingApi(async (api) => {
+    const tx = api.tx.unique.enableContractSponsoring(contractAddress, enable);
+    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
+    const result = getGenericResult(events);
+
+    expect(result.success).to.be.false;
+  });
+}
+
+export async function setTransferFlagExpectSuccess(sender: IKeyringPair, collectionId: number, enabled: boolean) {
+
+  await usingApi(async (api) => {
+
+    const tx = api.tx.unique.setTransfersEnabledFlag(collectionId, enabled);
+    const events = await submitTransactionAsync(sender, tx);
+    const result = getGenericResult(events);
+
+    expect(result.success).to.be.true;
+  });
+}
+
+export async function setTransferFlagExpectFailure(sender: IKeyringPair, collectionId: number, enabled: boolean) {
+
+  await usingApi(async (api) => {
+
+    const tx = api.tx.unique.setTransfersEnabledFlag(collectionId, enabled);
+    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
+    const result = getGenericResult(events);
+
+    expect(result.success).to.be.false;
+  });
+}
+
+export async function setContractSponsoringRateLimitExpectSuccess(sender: IKeyringPair, contractAddress: AccountId | string, rateLimit: number) {
+  await usingApi(async (api) => {
+    const tx = api.tx.unique.setContractSponsoringRateLimit(contractAddress, rateLimit);
+    const events = await submitTransactionAsync(sender, tx);
+    const result = getGenericResult(events);
+
+    expect(result.success).to.be.true;
+  });
+}
+
+export async function setContractSponsoringRateLimitExpectFailure(sender: IKeyringPair, contractAddress: AccountId | string, rateLimit: number) {
+  await usingApi(async (api) => {
+    const tx = api.tx.unique.setContractSponsoringRateLimit(contractAddress, rateLimit);
+    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
+    const result = getGenericResult(events);
+
+    expect(result.success).to.be.false;
+  });
+}
+
+export async function getNextSponsored(
+  api: ApiPromise,
+  collectionId: number,
+  account: string | CrossAccountId,
+  tokenId: number,
+): Promise<number> {
+  return Number((await api.rpc.unique.nextSponsored(collectionId, account, tokenId)).unwrapOr(-1));
+}
+
+export async function toggleContractAllowlistExpectSuccess(sender: IKeyringPair, contractAddress: AccountId | string, value = true) {
+  await usingApi(async (api) => {
+    const tx = api.tx.unique.toggleContractAllowList(contractAddress, value);
+    const events = await submitTransactionAsync(sender, tx);
+    const result = getGenericResult(events);
+
+    expect(result.success).to.be.true;
+  });
+}
+
+export async function isAllowlistedInContract(contractAddress: AccountId | string, user: string) {
+  let allowlisted = false;
+  await usingApi(async (api) => {
+    allowlisted = (await api.query.unique.contractAllowList(contractAddress, user)).toJSON() as boolean;
+  });
+  return allowlisted;
+}
+
+export async function addToContractAllowListExpectSuccess(sender: IKeyringPair, contractAddress: AccountId | string, user: AccountId | string) {
+  await usingApi(async (api) => {
+    const tx = api.tx.unique.addToContractAllowList(contractAddress.toString(), user.toString());
+    const events = await submitTransactionAsync(sender, tx);
+    const result = getGenericResult(events);
+
+    expect(result.success).to.be.true;
+  });
+}
+
+export async function removeFromContractAllowListExpectSuccess(sender: IKeyringPair, contractAddress: AccountId | string, user: AccountId | string) {
+  await usingApi(async (api) => {
+    const tx = api.tx.unique.removeFromContractAllowList(contractAddress.toString(), user.toString());
+    const events = await submitTransactionAsync(sender, tx);
+    const result = getGenericResult(events);
+
+    expect(result.success).to.be.true;
+  });
+}
+
+export async function removeFromContractAllowListExpectFailure(sender: IKeyringPair, contractAddress: AccountId | string, user: AccountId | string) {
+  await usingApi(async (api) => {
+    const tx = api.tx.unique.removeFromContractAllowList(contractAddress.toString(), user.toString());
+    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
+    const result = getGenericResult(events);
+
+    expect(result.success).to.be.false;
+  });
+}
+
+export interface CreateFungibleData {
+  readonly Value: bigint;
+}
+
+export interface CreateReFungibleData { }
+export interface CreateNftData { }
+
+export type CreateItemData = {
+  NFT: CreateNftData;
+} | {
+  Fungible: CreateFungibleData;
+} | {
+  ReFungible: CreateReFungibleData;
+};
+
+export async function burnItem(api: ApiPromise, sender: IKeyringPair, collectionId: number, tokenId: number, value: number | bigint) : Promise<boolean> {
+  const tx = api.tx.unique.burnItem(collectionId, tokenId, value);
+  const events = await submitTransactionAsync(sender, tx);
+  return getGenericResult(events).success;
+}
+
+export async function burnItemExpectSuccess(sender: IKeyringPair, collectionId: number, tokenId: number, value: number | bigint = 1) {
+  await usingApi(async (api) => {
+    const balanceBefore = await getBalance(api, collectionId, normalizeAccountId(sender), tokenId);
+    // if burning token by admin - use adminButnItemExpectSuccess
+    expect(balanceBefore >= BigInt(value)).to.be.true;
+
+    expect(await burnItem(api, sender, collectionId, tokenId, value)).to.be.true;
+
+    const balanceAfter = await getBalance(api, collectionId, normalizeAccountId(sender), tokenId);
+    expect(balanceAfter + BigInt(value)).to.be.equal(balanceBefore);
+  });
+}
+
+export async function burnItemExpectFailure(sender: IKeyringPair, collectionId: number, tokenId: number, value: number | bigint = 1) {
+  await usingApi(async (api) => {
+    const tx = api.tx.unique.burnItem(collectionId, tokenId, value);
+
+    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
+    const result = getCreateCollectionResult(events);
+    // tslint:disable-next-line:no-unused-expression
+    expect(result.success).to.be.false;
+  });
+}
+
+export async function burnFromExpectSuccess(sender: IKeyringPair, from: IKeyringPair | CrossAccountId, collectionId: number, tokenId: number, value: number | bigint = 1) {
+  await usingApi(async (api) => {
+    const tx = api.tx.unique.burnFrom(collectionId, normalizeAccountId(from), tokenId, value);
+    const events = await submitTransactionAsync(sender, tx);
+    return getGenericResult(events).success;
+  });
+}
+
+export async function
+approve(
+  api: ApiPromise,
+  collectionId: number,
+  tokenId: number, owner: IKeyringPair, approved: CrossAccountId | string | IKeyringPair, amount: number | bigint,
+) {
+  const approveUniqueTx = api.tx.unique.approve(normalizeAccountId(approved), collectionId, tokenId, amount);
+  const events = await submitTransactionAsync(owner, approveUniqueTx);
+  return getGenericResult(events).success;
+}
+
+export async function
+approveExpectSuccess(
+  collectionId: number,
+  tokenId: number, owner: IKeyringPair, approved: CrossAccountId | string, amount: number | bigint = 1,
+) {
+  await usingApi(async (api: ApiPromise) => {
+    const result = await approve(api, collectionId, tokenId, owner, approved, amount);
+    expect(result).to.be.true;
+
+    expect(await getAllowance(api, collectionId, owner, approved, tokenId)).to.be.equal(BigInt(amount));
+  });
+}
+
+export async function adminApproveFromExpectSuccess(
+  collectionId: number,
+  tokenId: number, admin: IKeyringPair, owner: CrossAccountId | string, approved: CrossAccountId | string, amount: number | bigint = 1,
+) {
+  await usingApi(async (api: ApiPromise) => {
+    const approveUniqueTx = api.tx.unique.approve(normalizeAccountId(approved), collectionId, tokenId, amount);
+    const events = await submitTransactionAsync(admin, approveUniqueTx);
+    const result = getGenericResult(events);
+    expect(result.success).to.be.true;
+
+    expect(await getAllowance(api, collectionId, owner, approved, tokenId)).to.be.equal(BigInt(amount));
+  });
+}
+
+export async function
+transferFrom(
+  api: ApiPromise,
+  collectionId: number,
+  tokenId: number,
+  accountApproved: IKeyringPair,
+  accountFrom: IKeyringPair | CrossAccountId,
+  accountTo: IKeyringPair | CrossAccountId,
+  value: number | bigint,
+) {
+  const from = normalizeAccountId(accountFrom);
+  const to = normalizeAccountId(accountTo);
+  const transferFromTx = api.tx.unique.transferFrom(from, to, collectionId, tokenId, value);
+  const events = await submitTransactionAsync(accountApproved, transferFromTx);
+  return getGenericResult(events).success;
+}
+
+export async function
+transferFromExpectSuccess(
+  collectionId: number,
+  tokenId: number,
+  accountApproved: IKeyringPair,
+  accountFrom: IKeyringPair | CrossAccountId,
+  accountTo: IKeyringPair | CrossAccountId,
+  value: number | bigint = 1,
+  type = 'NFT',
+) {
+  await usingApi(async (api: ApiPromise) => {
+    const from = normalizeAccountId(accountFrom);
+    const to = normalizeAccountId(accountTo);
+    let balanceBefore = 0n;
+    if (type === 'Fungible' || type === 'ReFungible') {
+      balanceBefore = await getBalance(api, collectionId, to, tokenId);
+    }
+    expect(await transferFrom(api, collectionId, tokenId, accountApproved, accountFrom, accountTo, value)).to.be.true;
+    if (type === 'NFT') {
+      expect(await getTokenOwner(api, collectionId, tokenId)).to.be.deep.equal(to);
+    }
+    if (type === 'Fungible') {
+      const balanceAfter = await getBalance(api, collectionId, to, tokenId);
+      if (JSON.stringify(to) !== JSON.stringify(from)) {
+        expect(balanceAfter - balanceBefore).to.be.equal(BigInt(value));
+      } else {
+        expect(balanceAfter).to.be.equal(balanceBefore);
+      }
+    }
+    if (type === 'ReFungible') {
+      expect(await getBalance(api, collectionId, to, tokenId)).to.be.equal(balanceBefore + BigInt(value));
+    }
+  });
+}
+
+export async function
+transferFromExpectFail(
+  collectionId: number,
+  tokenId: number,
+  accountApproved: IKeyringPair,
+  accountFrom: IKeyringPair,
+  accountTo: IKeyringPair,
+  value: number | bigint = 1,
+) {
+  await usingApi(async (api: ApiPromise) => {
+    const transferFromTx = api.tx.unique.transferFrom(normalizeAccountId(accountFrom.address), normalizeAccountId(accountTo.address), collectionId, tokenId, value);
+    const events = await expect(submitTransactionExpectFailAsync(accountApproved, transferFromTx)).to.be.rejected;
+    const result = getCreateCollectionResult(events);
+    // tslint:disable-next-line:no-unused-expression
+    expect(result.success).to.be.false;
+  });
+}
+
+/* eslint no-async-promise-executor: "off" */
+export async function getBlockNumber(api: ApiPromise): Promise<number> {
+  return new Promise<number>(async (resolve) => {
+    const unsubscribe = await api.rpc.chain.subscribeNewHeads((head) => {
+      unsubscribe();
+      resolve(head.number.toNumber());
+    });
+  });
+}
+
+export async function addCollectionAdminExpectSuccess(sender: IKeyringPair, collectionId: number, address: string | CrossAccountId) {
+  await usingApi(async (api) => {
+    const changeAdminTx = api.tx.unique.addCollectionAdmin(collectionId, normalizeAccountId(address));
+    const events = await submitTransactionAsync(sender, changeAdminTx);
+    const result = getCreateCollectionResult(events);
+    expect(result.success).to.be.true;
+  });
+}
+
+export async function adminApproveFromExpectFail(
+  collectionId: number,
+  tokenId: number, admin: IKeyringPair, owner: CrossAccountId | string, approved: CrossAccountId | string, amount: number | bigint = 1,
+) {
+  await usingApi(async (api: ApiPromise) => {
+    const approveUniqueTx = api.tx.unique.approve(normalizeAccountId(approved), collectionId, tokenId, amount);
+    const events = await expect(submitTransactionAsync(admin, approveUniqueTx)).to.be.rejected;
+    const result = getGenericResult(events);
+    expect(result.success).to.be.false;
+  });
+}
+
+export async function
+getFreeBalance(account: IKeyringPair): Promise<bigint> {
+  let balance = 0n;
+  await usingApi(async (api) => {
+    balance = BigInt((await api.query.system.account(account.address)).data.free.toString());
+  });
+
+  return balance;
+}
+
+export async function paraSiblingSovereignAccount(paraid: number): Promise<string> {
+  return usingApi(async api => {
+    // We are getting a *sibling* parachain sovereign account,
+    // so we need a sibling prefix: encoded(b"sibl") == 0x7369626c
+    const siblingPrefix = '0x7369626c';
+
+    const encodedParaId = api.createType('u32', paraid).toHex(true).substring(2);
+    const suffix = '000000000000000000000000000000000000000000000000';
+
+    return siblingPrefix + encodedParaId + suffix;
+  });
+}
+
+export async function transferBalanceTo(api: ApiPromise, source: IKeyringPair, target: string, amount = 1000n * UNIQUE) {
+  const tx = api.tx.balances.transfer(target, amount);
+  const events = await submitTransactionAsync(source, tx);
+  const result = getGenericResult(events);
+  expect(result.success).to.be.true;
+}
+
+export async function
+scheduleExpectSuccess(
+  operationTx: any,
+  sender: IKeyringPair,
+  blockSchedule: number,
+  scheduledId: string,
+  period = 1,
+  repetitions = 1,
+) {
+  await usingApi(async (api: ApiPromise) => {
+    const blockNumber: number | undefined = await getBlockNumber(api);
+    const expectedBlockNumber = blockNumber + blockSchedule;
+
+    expect(blockNumber).to.be.greaterThan(0);
+    const scheduleTx = api.tx.scheduler.scheduleNamed( // schedule
+      scheduledId,
+      expectedBlockNumber,
+      repetitions > 1 ? [period, repetitions] : null,
+      0,
+      {Value: operationTx as any},
+    );
+
+    const events = await submitTransactionAsync(sender, scheduleTx);
+    expect(getGenericResult(events).success).to.be.true;
+  });
+}
+
+export async function
+scheduleExpectFailure(
+  operationTx: any,
+  sender: IKeyringPair,
+  blockSchedule: number,
+  scheduledId: string,
+  period = 1,
+  repetitions = 1,
+) {
+  await usingApi(async (api: ApiPromise) => {
+    const blockNumber: number | undefined = await getBlockNumber(api);
+    const expectedBlockNumber = blockNumber + blockSchedule;
+
+    expect(blockNumber).to.be.greaterThan(0);
+    const scheduleTx = api.tx.scheduler.scheduleNamed( // schedule
+      scheduledId,
+      expectedBlockNumber,
+      repetitions <= 1 ? null : [period, repetitions],
+      0,
+      {Value: operationTx as any},
+    );
+
+    //const events =
+    await expect(submitTransactionExpectFailAsync(sender, scheduleTx)).to.be.rejected;
+    //expect(getGenericResult(events).success).to.be.false;
+  });
+}
+
+export async function
+scheduleTransferAndWaitExpectSuccess(
+  collectionId: number,
+  tokenId: number,
+  sender: IKeyringPair,
+  recipient: IKeyringPair,
+  value: number | bigint = 1,
+  blockSchedule: number,
+  scheduledId: string,
+) {
+  await usingApi(async (api: ApiPromise) => {
+    await scheduleTransferExpectSuccess(collectionId, tokenId, sender, recipient, value, blockSchedule, scheduledId);
+
+    const recipientBalanceBefore = (await api.query.system.account(recipient.address)).data.free.toBigInt();
+
+    // sleep for n + 1 blocks
+    await waitNewBlocks(blockSchedule + 1);
+
+    const recipientBalanceAfter = (await api.query.system.account(recipient.address)).data.free.toBigInt();
+
+    expect(await getTokenOwner(api, collectionId, tokenId)).to.be.deep.equal(normalizeAccountId(recipient.address));
+    expect(recipientBalanceAfter).to.be.equal(recipientBalanceBefore);
+  });
+}
+
+export async function
+scheduleTransferExpectSuccess(
+  collectionId: number,
+  tokenId: number,
+  sender: IKeyringPair,
+  recipient: IKeyringPair,
+  value: number | bigint = 1,
+  blockSchedule: number,
+  scheduledId: string,
+) {
+  await usingApi(async (api: ApiPromise) => {
+    const transferTx = api.tx.unique.transfer(normalizeAccountId(recipient.address), collectionId, tokenId, value);
+
+    await scheduleExpectSuccess(transferTx, sender, blockSchedule, scheduledId);
+
+    expect(await getTokenOwner(api, collectionId, tokenId)).to.be.deep.equal(normalizeAccountId(sender.address));
+  });
+}
+
+export async function
+scheduleTransferFundsPeriodicExpectSuccess(
+  amount: bigint,
+  sender: IKeyringPair,
+  recipient: IKeyringPair,
+  blockSchedule: number,
+  scheduledId: string,
+  period: number,
+  repetitions: number,
+) {
+  await usingApi(async (api: ApiPromise) => {
+    const transferTx = api.tx.balances.transfer(recipient.address, amount);
+
+    const balanceBefore = await getFreeBalance(recipient);
+
+    await scheduleExpectSuccess(transferTx, sender, blockSchedule, scheduledId, period, repetitions);
+
+    expect(await getFreeBalance(recipient)).to.be.equal(balanceBefore);
+  });
+}
+
+export async function
+transfer(
+  api: ApiPromise,
+  collectionId: number,
+  tokenId: number,
+  sender: IKeyringPair,
+  recipient: IKeyringPair | CrossAccountId,
+  value: number | bigint,
+) : Promise<boolean> {
+  const transferTx = api.tx.unique.transfer(normalizeAccountId(recipient), collectionId, tokenId, value);
+  const events = await executeTransaction(api, sender, transferTx);
+  return getGenericResult(events).success;
+}
+
+export async function
+transferExpectSuccess(
+  collectionId: number,
+  tokenId: number,
+  sender: IKeyringPair,
+  recipient: IKeyringPair | CrossAccountId,
+  value: number | bigint = 1,
+  type = 'NFT',
+) {
+  await usingApi(async (api: ApiPromise) => {
+    const from = normalizeAccountId(sender);
+    const to = normalizeAccountId(recipient);
+
+    let balanceBefore = 0n;
+    if (type === 'Fungible' || type === 'ReFungible') {
+      balanceBefore = await getBalance(api, collectionId, to, tokenId);
+    }
+
+    const transferTx = api.tx.unique.transfer(normalizeAccountId(recipient), collectionId, tokenId, value);
+    const events = await executeTransaction(api, sender, transferTx);
+    const result = getTransferResult(api, events);
+
+    expect(result.collectionId).to.be.equal(collectionId);
+    expect(result.itemId).to.be.equal(tokenId);
+    expect(result.sender).to.be.deep.equal(normalizeAccountId(sender.address));
+    expect(result.recipient).to.be.deep.equal(to);
+    expect(result.value).to.be.equal(BigInt(value));
+
+    if (type === 'NFT') {
+      expect(await getTokenOwner(api, collectionId, tokenId)).to.be.deep.equal(to);
+    }
+    if (type === 'Fungible' || type === 'ReFungible') {
+      const balanceAfter = await getBalance(api, collectionId, to, tokenId);
+      if (JSON.stringify(to) !== JSON.stringify(from)) {
+        expect(balanceAfter - balanceBefore).to.be.equal(BigInt(value));
+      } else {
+        expect(balanceAfter).to.be.equal(balanceBefore);
+      }
+    }
+  });
+}
+
+export async function
+transferExpectFailure(
+  collectionId: number,
+  tokenId: number,
+  sender: IKeyringPair,
+  recipient: IKeyringPair | CrossAccountId,
+  value: number | bigint = 1,
+) {
+  await usingApi(async (api: ApiPromise) => {
+    const transferTx = api.tx.unique.transfer(normalizeAccountId(recipient), collectionId, tokenId, value);
+    const events = await expect(submitTransactionExpectFailAsync(sender, transferTx)).to.be.rejected;
+    const result = getGenericResult(events);
+    // if (events && Array.isArray(events)) {
+    //   const result = getCreateCollectionResult(events);
+    // tslint:disable-next-line:no-unused-expression
+    expect(result.success).to.be.false;
+    //}
+  });
+}
+
+export async function
+approveExpectFail(
+  collectionId: number,
+  tokenId: number, owner: IKeyringPair, approved: IKeyringPair, amount: number | bigint = 1,
+) {
+  await usingApi(async (api: ApiPromise) => {
+    const approveUniqueTx = api.tx.unique.approve(normalizeAccountId(approved.address), collectionId, tokenId, amount);
+    const events = await expect(submitTransactionExpectFailAsync(owner, approveUniqueTx)).to.be.rejected;
+    const result = getCreateCollectionResult(events);
+    // tslint:disable-next-line:no-unused-expression
+    expect(result.success).to.be.false;
+  });
+}
+
+export async function getBalance(
+  api: ApiPromise,
+  collectionId: number,
+  owner: string | CrossAccountId | IKeyringPair,
+  token: number,
+): Promise<bigint> {
+  return (await api.rpc.unique.balance(collectionId, normalizeAccountId(owner), token)).toBigInt();
+}
+export async function getTokenOwner(
+  api: ApiPromise,
+  collectionId: number,
+  token: number,
+): Promise<CrossAccountId> {
+  const owner = (await api.rpc.unique.tokenOwner(collectionId, token)).toJSON() as any;
+  if (owner == null) throw new Error('owner == null');
+  return normalizeAccountId(owner);
+}
+export async function getTopmostTokenOwner(
+  api: ApiPromise,
+  collectionId: number,
+  token: number,
+): Promise<CrossAccountId> {
+  const owner = (await api.rpc.unique.topmostTokenOwner(collectionId, token)).toJSON() as any;
+  if (owner == null) throw new Error('owner == null');
+  return normalizeAccountId(owner);
+}
+export async function getTokenChildren(
+  api: ApiPromise,
+  collectionId: number,
+  tokenId: number,
+): Promise<UpDataStructsTokenChild[]> {
+  return (await api.rpc.unique.tokenChildren(collectionId, tokenId)).toJSON() as any;
+}
+export async function isTokenExists(
+  api: ApiPromise,
+  collectionId: number,
+  token: number,
+): Promise<boolean> {
+  return (await api.rpc.unique.tokenExists(collectionId, token)).toJSON();
+}
+export async function getLastTokenId(
+  api: ApiPromise,
+  collectionId: number,
+): Promise<number> {
+  return (await api.rpc.unique.lastTokenId(collectionId)).toJSON();
+}
+export async function getAdminList(
+  api: ApiPromise,
+  collectionId: number,
+): Promise<string[]> {
+  return (await api.rpc.unique.adminlist(collectionId)).toHuman() as any;
+}
+export async function getTokenProperties(
+  api: ApiPromise,
+  collectionId: number,
+  tokenId: number,
+  propertyKeys: string[],
+): Promise<UpDataStructsProperty[]> {
+  return (await api.rpc.unique.tokenProperties(collectionId, tokenId, propertyKeys)).toHuman() as any;
+}
+
+export async function createFungibleItemExpectSuccess(
+  sender: IKeyringPair,
+  collectionId: number,
+  data: CreateFungibleData,
+  owner: CrossAccountId | string = sender.address,
+) {
+  return await usingApi(async (api) => {
+    const tx = api.tx.unique.createItem(collectionId, normalizeAccountId(owner), {Fungible: data});
+
+    const events = await submitTransactionAsync(sender, tx);
+    const result = getCreateItemResult(events);
+
+    expect(result.success).to.be.true;
+    return result.itemId;
+  });
+}
+
+export async function createMultipleItemsExpectSuccess(sender: IKeyringPair, collectionId: number, itemsData: any, owner: CrossAccountId | string = sender.address) {
+  await usingApi(async (api) => {
+    const to = normalizeAccountId(owner);
+    const tx = api.tx.unique.createMultipleItems(collectionId, to, itemsData);
+
+    const events = await submitTransactionAsync(sender, tx);
+    expect(getGenericResult(events).success).to.be.true;
+  });
+}
+
+export async function createMultipleItemsWithPropsExpectSuccess(sender: IKeyringPair, collectionId: number, itemsData: any, owner: CrossAccountId | string = sender.address) {
+  await usingApi(async (api) => {
+    const to = normalizeAccountId(owner);
+    const tx = api.tx.unique.createMultipleItems(collectionId, to, itemsData);
+
+    const events = await submitTransactionAsync(sender, tx);
+    const result = getCreateItemsResult(events);
+
+    for (const res of result) {
+      expect(await api.rpc.unique.tokenProperties(collectionId, res.itemId)).not.to.be.empty;
+    }
+  });
+}
+
+export async function createMultipleItemsExWithPropsExpectSuccess(sender: IKeyringPair, collectionId: number, itemsData: any) {
+  await usingApi(async (api) => {
+    const tx = api.tx.unique.createMultipleItemsEx(collectionId, itemsData);
+
+    const events = await submitTransactionAsync(sender, tx);
+    const result = getCreateItemsResult(events);
+
+    for (const res of result) {
+      expect(await api.rpc.unique.tokenProperties(collectionId, res.itemId)).not.to.be.empty;
+    }
+  });
+}
+
+export async function createItemWithPropsExpectSuccess(sender: IKeyringPair, collectionId: number, createMode: string, props:  Array<Property>, owner: CrossAccountId | string = sender.address) {
+  let newItemId = 0;
+  await usingApi(async (api) => {
+    const to = normalizeAccountId(owner);
+    const itemCountBefore = await getLastTokenId(api, collectionId);
+    const itemBalanceBefore = await getBalance(api, collectionId, to, newItemId);
+
+    let tx;
+    if (createMode === 'Fungible') {
+      const createData = {fungible: {value: 10}};
+      tx = api.tx.unique.createItem(collectionId, to, createData as any);
+    } else if (createMode === 'ReFungible') {
+      const createData = {refungible: {pieces: 100}};
+      tx = api.tx.unique.createItem(collectionId, to, createData as any);
+    } else {
+      const data = api.createType('UpDataStructsCreateItemData', {NFT: {properties: props}});
+      tx = api.tx.unique.createItem(collectionId, to, data as UpDataStructsCreateItemData);
+    }
+
+    const events = await submitTransactionAsync(sender, tx);
+    const result = getCreateItemResult(events);
+
+    const itemCountAfter = await getLastTokenId(api, collectionId);
+    const itemBalanceAfter = await getBalance(api, collectionId, to, newItemId);
+
+    if (createMode === 'NFT') {
+      expect(await api.rpc.unique.tokenProperties(collectionId, result.itemId)).not.to.be.empty;
+    }
+
+    // What to expect
+    // tslint:disable-next-line:no-unused-expression
+    expect(result.success).to.be.true;
+    if (createMode === 'Fungible') {
+      expect(itemBalanceAfter - itemBalanceBefore).to.be.equal(10n);
+    } else {
+      expect(itemCountAfter).to.be.equal(itemCountBefore + 1);
+    }
+    expect(collectionId).to.be.equal(result.collectionId);
+    expect(itemCountAfter.toString()).to.be.equal(result.itemId.toString());
+    expect(to).to.be.deep.equal(result.recipient);
+    newItemId = result.itemId;
+  });
+  return newItemId;
+}
+
+export async function createItemWithPropsExpectFailure(sender: IKeyringPair, collectionId: number, createMode: string, props: Array<Property>, owner: CrossAccountId | string = sender.address) {
+  await usingApi(async (api) => {
+
+    let tx;
+    if (createMode === 'NFT') {
+      const data = api.createType('UpDataStructsCreateItemData', {NFT: {properties: props}}) as UpDataStructsCreateItemData;
+      tx = api.tx.unique.createItem(collectionId, normalizeAccountId(owner), data);
+    } else {
+      tx = api.tx.unique.createItem(collectionId, normalizeAccountId(owner), createMode);
+    }
+
+
+    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
+    if(events.message && events.message.toString().indexOf('1002: Verification Error') > -1) return;
+    const result = getCreateItemResult(events);
+
+    expect(result.success).to.be.false;
+  });
+}
+
+export async function createItemExpectSuccess(sender: IKeyringPair, collectionId: number, createMode: string, owner: CrossAccountId | string = sender.address) {
+  let newItemId = 0;
+  await usingApi(async (api) => {
+    const to = normalizeAccountId(owner);
+    const itemCountBefore = await getLastTokenId(api, collectionId);
+    const itemBalanceBefore = await getBalance(api, collectionId, to, newItemId);
+
+    let tx;
+    if (createMode === 'Fungible') {
+      const createData = {fungible: {value: 10}};
+      tx = api.tx.unique.createItem(collectionId, to, createData as any);
+    } else if (createMode === 'ReFungible') {
+      const createData = {refungible: {pieces: 100}};
+      tx = api.tx.unique.createItem(collectionId, to, createData as any);
+    } else {
+      const createData = {nft: {}};
+      tx = api.tx.unique.createItem(collectionId, to, createData as any);
+    }
+
+    const events = await executeTransaction(api, sender, tx);
+    const result = getCreateItemResult(events);
+
+    const itemCountAfter = await getLastTokenId(api, collectionId);
+    const itemBalanceAfter = await getBalance(api, collectionId, to, newItemId);
+
+    // What to expect
+    // tslint:disable-next-line:no-unused-expression
+    expect(result.success).to.be.true;
+    if (createMode === 'Fungible') {
+      expect(itemBalanceAfter - itemBalanceBefore).to.be.equal(10n);
+    } else {
+      expect(itemCountAfter).to.be.equal(itemCountBefore + 1);
+    }
+    expect(collectionId).to.be.equal(result.collectionId);
+    expect(itemCountAfter.toString()).to.be.equal(result.itemId.toString());
+    expect(to).to.be.deep.equal(result.recipient);
+    newItemId = result.itemId;
+  });
+  return newItemId;
+}
+
+export async function createRefungibleToken(api: ApiPromise, sender: IKeyringPair, collectionId: number, amount: bigint, owner: CrossAccountId | IKeyringPair | string = sender.address) : Promise<CreateItemResult> {
+  const createData = {refungible: {pieces: amount}};
+  const tx = api.tx.unique.createItem(collectionId, normalizeAccountId(owner), createData as any);
+
+  const events = await submitTransactionAsync(sender, tx);
+  return  getCreateItemResult(events);
+}
+
+export async function createItemExpectFailure(sender: IKeyringPair, collectionId: number, createMode: string, owner: CrossAccountId | string = sender.address) {
+  await usingApi(async (api) => {
+    const tx = api.tx.unique.createItem(collectionId, normalizeAccountId(owner), createMode);
+
+    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
+    const result = getCreateItemResult(events);
+
+    expect(result.success).to.be.false;
+  });
+}
+
+export async function setPublicAccessModeExpectSuccess(
+  sender: IKeyringPair, collectionId: number,
+  accessMode: 'Normal' | 'AllowList',
+) {
+  await usingApi(async (api) => {
+
+    // Run the transaction
+    const tx = api.tx.unique.setCollectionPermissions(collectionId, {access: accessMode});
+    const events = await submitTransactionAsync(sender, tx);
+    const result = getGenericResult(events);
+
+    // Get the collection
+    const collection = await queryCollectionExpectSuccess(api, collectionId);
+
+    // What to expect
+    // tslint:disable-next-line:no-unused-expression
+    expect(result.success).to.be.true;
+    expect(collection.permissions.access.toHuman()).to.be.equal(accessMode);
+  });
+}
+
+export async function setPublicAccessModeExpectFail(
+  sender: IKeyringPair, collectionId: number,
+  accessMode: 'Normal' | 'AllowList',
+) {
+  await usingApi(async (api) => {
+
+    // Run the transaction
+    const tx = api.tx.unique.setCollectionPermissions(collectionId, {access: accessMode});
+    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
+    const result = getGenericResult(events);
+
+    // What to expect
+    // tslint:disable-next-line:no-unused-expression
+    expect(result.success).to.be.false;
+  });
+}
+
+export async function enableAllowListExpectSuccess(sender: IKeyringPair, collectionId: number) {
+  await setPublicAccessModeExpectSuccess(sender, collectionId, 'AllowList');
+}
+
+export async function enableAllowListExpectFail(sender: IKeyringPair, collectionId: number) {
+  await setPublicAccessModeExpectFail(sender, collectionId, 'AllowList');
+}
+
+export async function disableAllowListExpectSuccess(sender: IKeyringPair, collectionId: number) {
+  await setPublicAccessModeExpectSuccess(sender, collectionId, 'Normal');
+}
+
+export async function setMintPermissionExpectSuccess(sender: IKeyringPair, collectionId: number, enabled: boolean) {
+  await usingApi(async (api) => {
+
+    // Run the transaction
+    const tx = api.tx.unique.setCollectionPermissions(collectionId, {mintMode: enabled});
+    const events = await submitTransactionAsync(sender, tx);
+    const result = getGenericResult(events);
+    expect(result.success).to.be.true;
+
+    // Get the collection
+    const collection = await queryCollectionExpectSuccess(api, collectionId);
+
+    expect(collection.permissions.mintMode.toHuman()).to.be.equal(enabled);
+  });
+}
+
+export async function enablePublicMintingExpectSuccess(sender: IKeyringPair, collectionId: number) {
+  await setMintPermissionExpectSuccess(sender, collectionId, true);
+}
+
+export async function setMintPermissionExpectFailure(sender: IKeyringPair, collectionId: number, enabled: boolean) {
+  await usingApi(async (api) => {
+    // Run the transaction
+    const tx = api.tx.unique.setCollectionPermissions(collectionId, {mintMode: enabled});
+    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
+    const result = getCreateCollectionResult(events);
+    // tslint:disable-next-line:no-unused-expression
+    expect(result.success).to.be.false;
+  });
+}
+
+export async function setChainLimitsExpectFailure(sender: IKeyringPair, limits: IChainLimits) {
+  await usingApi(async (api) => {
+    // Run the transaction
+    const tx = api.tx.unique.setChainLimits(limits);
+    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
+    const result = getCreateCollectionResult(events);
+    // tslint:disable-next-line:no-unused-expression
+    expect(result.success).to.be.false;
+  });
+}
+
+export async function isAllowlisted(api: ApiPromise, collectionId: number, address: string | CrossAccountId | IKeyringPair) {
+  return (await api.rpc.unique.allowed(collectionId, normalizeAccountId(address))).toJSON();
+}
+
+export async function addToAllowListExpectSuccess(sender: IKeyringPair, collectionId: number, address: string | AccountId | CrossAccountId) {
+  await usingApi(async (api) => {
+    expect(await isAllowlisted(api, collectionId, normalizeAccountId(address))).to.be.false;
+
+    // Run the transaction
+    const tx = api.tx.unique.addToAllowList(collectionId, normalizeAccountId(address));
+    const events = await submitTransactionAsync(sender, tx);
+    const result = getGenericResult(events);
+    expect(result.success).to.be.true;
+
+    expect(await isAllowlisted(api, collectionId, normalizeAccountId(address))).to.be.true;
+  });
+}
+
+export async function addToAllowListAgainExpectSuccess(sender: IKeyringPair, collectionId: number, address: string | AccountId) {
+  await usingApi(async (api) => {
+
+    expect(await isAllowlisted(api, collectionId, normalizeAccountId(address))).to.be.true;
+
+    // Run the transaction
+    const tx = api.tx.unique.addToAllowList(collectionId, normalizeAccountId(address));
+    const events = await submitTransactionAsync(sender, tx);
+    const result = getGenericResult(events);
+    expect(result.success).to.be.true;
+
+    expect(await isAllowlisted(api, collectionId, normalizeAccountId(address))).to.be.true;
+  });
+}
+
+export async function addToAllowListExpectFail(sender: IKeyringPair, collectionId: number, address: string | AccountId) {
+  await usingApi(async (api) => {
+
+    // Run the transaction
+    const tx = api.tx.unique.addToAllowList(collectionId, normalizeAccountId(address));
+    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
+    const result = getGenericResult(events);
+
+    // What to expect
+    // tslint:disable-next-line:no-unused-expression
+    expect(result.success).to.be.false;
+  });
+}
+
+export async function removeFromAllowListExpectSuccess(sender: IKeyringPair, collectionId: number, address: CrossAccountId) {
+  await usingApi(async (api) => {
+    // Run the transaction
+    const tx = api.tx.unique.removeFromAllowList(collectionId, normalizeAccountId(address));
+    const events = await submitTransactionAsync(sender, tx);
+    const result = getGenericResult(events);
+
+    // What to expect
+    // tslint:disable-next-line:no-unused-expression
+    expect(result.success).to.be.true;
+  });
+}
+
+export async function removeFromAllowListExpectFailure(sender: IKeyringPair, collectionId: number, address: CrossAccountId) {
+  await usingApi(async (api) => {
+    // Run the transaction
+    const tx = api.tx.unique.removeFromAllowList(collectionId, normalizeAccountId(address));
+    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
+    const result = getGenericResult(events);
+
+    // What to expect
+    // tslint:disable-next-line:no-unused-expression
+    expect(result.success).to.be.false;
+  });
+}
+
+export const getDetailedCollectionInfo = async (api: ApiPromise, collectionId: number)
+  : Promise<UpDataStructsRpcCollection | null> => {
+  return (await api.rpc.unique.collectionById(collectionId)).unwrapOr(null);
+};
+
+export const getCreatedCollectionCount = async (api: ApiPromise): Promise<number> => {
+  // set global object - collectionsCount
+  return (await api.rpc.unique.collectionStats()).created.toNumber();
+};
+
+export async function queryCollectionExpectSuccess(api: ApiPromise, collectionId: number): Promise<UpDataStructsRpcCollection> {
+  return (await api.rpc.unique.collectionById(collectionId)).unwrap();
+}
+
+export const describe_xcm = (
+  process.env.RUN_XCM_TESTS
+    ? describe
+    : describe.skip
+);
+
+export async function waitNewBlocks(blocksCount = 1): Promise<void> {
+  await usingApi(async (api) => {
+    const promise = new Promise<void>(async (resolve) => {
+      const unsubscribe = await api.rpc.chain.subscribeNewHeads(() => {
+        if (blocksCount > 0) {
+          blocksCount--;
+        } else {
+          unsubscribe();
+          resolve();
+        }
+      });
+    });
+    return promise;
+  });
+}
+
+export async function waitEvent(
+  api: ApiPromise,
+  maxBlocksToWait: number,
+  eventSection: string,
+  eventMethod: string,
+): Promise<EventRecord | null> {
+
+  const promise = new Promise<EventRecord | null>(async (resolve) => {
+    const unsubscribe = await api.rpc.chain.subscribeNewHeads(async header => {
+      const blockNumber = header.number.toHuman();
+      const blockHash = header.hash;
+      const eventIdStr = `${eventSection}.${eventMethod}`;
+      const waitLimitStr = `wait blocks remaining: ${maxBlocksToWait}`;
+
+      console.log(`[Block #${blockNumber}] Waiting for event \`${eventIdStr}\` (${waitLimitStr})`);
+
+      const apiAt = await api.at(blockHash);
+      const eventRecords = await apiAt.query.system.events();
+
+      const neededEvent = eventRecords.find(r => {
+        return r.event.section == eventSection && r.event.method == eventMethod;
+      });
+
+      if (neededEvent) {
+        unsubscribe();
+        resolve(neededEvent);
+      } else if (maxBlocksToWait > 0) {
+        maxBlocksToWait--;
+      } else {
+        console.log(`Event \`${eventIdStr}\` is NOT found`);
+
+        unsubscribe();
+        resolve(null);
+      }
+    });
+  });
+  return promise;
+}
+
+export async function repartitionRFT(
+  api: ApiPromise,
+  collectionId: number,
+  sender: IKeyringPair,
+  tokenId: number,
+  amount: bigint,
+): Promise<boolean> {
+  const tx = api.tx.unique.repartition(collectionId, tokenId, amount);
+  const events = await submitTransactionAsync(sender, tx);
+  const result = getGenericResult(events);
+
+  return result.success;
+}
+
+export async function itApi(name: string, cb: (apis: { api: ApiPromise, privateKeyWrapper: (account: string) => IKeyringPair }) => any, opts: { only?: boolean, skip?: boolean } = {}) {
+  let i: any = it;
+  if (opts.only) i = i.only;
+  else if (opts.skip) i = i.skip;
+  i(name, async () => {
+    await usingApi(async (api, privateKeyWrapper) => {
+      await cb({api, privateKeyWrapper});
+    });
+  });
+}
+
+itApi.only = (name: string, cb: (apis: { api: ApiPromise, privateKeyWrapper: (account: string) => IKeyringPair }) => any) => itApi(name, cb, {only: true});
+itApi.skip = (name: string, cb: (apis: { api: ApiPromise, privateKeyWrapper: (account: string) => IKeyringPair }) => any) => itApi(name, cb, {skip: true});
+
+let accountSeed = 10000;
+export function generateKeyringPair(keyring: Keyring) {
+  const privateKey = `0xDEADBEEF${(Date.now() + (accountSeed++)).toString(16).padStart(64 - 8, '0')}`;
+  return keyring.addFromUri(privateKey);
+}
+
+export async function expectSubstrateEventsAtBlock(api: ApiPromise, blockNumber: AnyNumber | BlockNumber, section: string, methods: string[], dryRun = false) {
+  const blockHash = await api.rpc.chain.getBlockHash(blockNumber);
+  const subEvents = (await api.query.system.events.at(blockHash))
+    .filter(x => x.event.section === section)
+    .map((x) => x.toHuman());
+  const events = methods.map((m) => {
+    return {
+      event: {
+        method: m,
+        section,
+      },
+    };
+  });
+  if (!dryRun) {
+    expect(subEvents).to.be.like(events);
+  }
+  return subEvents;
+}
addedtests/src/deprecated-helpers/util.tsdiffbeforeafterboth
--- /dev/null
+++ b/tests/src/deprecated-helpers/util.ts
@@ -0,0 +1,46 @@
+// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.
+// This file is part of Unique Network.
+
+// Unique Network is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Unique Network is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
+
+export function strToUTF16(str: string): any {
+  const buf: number[] = [];
+  for (let i=0, strLen=str.length; i < strLen; i++) {
+    buf.push(str.charCodeAt(i));
+  }
+  return buf;
+}
+
+export function utf16ToStr(buf: number[]): string {
+  let str = '';
+  for (let i=0, strLen=buf.length; i < strLen; i++) {
+    if (buf[i] != 0) str += String.fromCharCode(buf[i]);
+    else break;
+  }
+  return str;
+}
+
+export function hexToStr(buf: string): string {
+  let str = '';
+  let hexStart = buf.indexOf('0x');
+  if (hexStart < 0) hexStart = 0;
+  else hexStart = 2;  
+  for (let i=hexStart, strLen=buf.length; i < strLen; i+=2) {
+    const ch = buf[i] + buf[i+1];
+    const num = parseInt(ch, 16);
+    if (num != 0) str += String.fromCharCode(num);
+    else break;
+  }
+  return str;
+}
modifiedtests/src/eth/base.test.tsdiffbeforeafterboth
--- a/tests/src/eth/base.test.ts
+++ b/tests/src/eth/base.test.ts
@@ -14,16 +14,12 @@
 // You should have received a copy of the GNU General Public License
 // along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
 
-import {
-  ethBalanceViaSub,
-  GAS_ARGS,
-  recordEthFee,
-} from './util/helpers';
 import {Contract} from 'web3-eth-contract';
 
 import {IKeyringPair} from '@polkadot/types/types';
 import {EthUniqueHelper, itEth, usingEthPlaygrounds, expect} from './util/playgrounds';
 
+
 describe('Contract calls', () => {
   let donor: IKeyringPair;
 
@@ -37,15 +33,15 @@
     const deployer = await helper.eth.createAccountWithBalance(donor);
     const flipper = await helper.eth.deployFlipper(deployer);
 
-    const cost = await recordEthFee(helper.api!, deployer, () => flipper.methods.flip().send({from: deployer}));
+    const cost = await helper.eth.calculateFee({Ethereum: deployer}, () => flipper.methods.flip().send({from: deployer}));
     expect(cost < BigInt(0.2 * Number(helper.balance.getOneTokenNominal()))).to.be.true;
   });
 
   itEth('Balance transfer fee is less than 0.2 UNQ', async ({helper}) => {
     const userA = await helper.eth.createAccountWithBalance(donor);
     const userB = helper.eth.createAccount();
-    const cost = await recordEthFee(helper.api!, userA, () => helper.web3!.eth.sendTransaction({from: userA, to: userB, value: '1000000', ...GAS_ARGS}));
-    const balanceB = await ethBalanceViaSub(helper.api!, userB);
+    const cost = await helper.eth.calculateFee({Ethereum: userA}, () => helper.getWeb3().eth.sendTransaction({from: userA, to: userB, value: '1000000', gas: helper.eth.DEFAULT_GAS}));
+    const balanceB = await helper.balance.getEthereum(userB);
     expect(cost - balanceB < BigInt(0.2 * Number(helper.balance.getOneTokenNominal()))).to.be.true;
   });
 
@@ -60,7 +56,7 @@
     const address = helper.ethAddress.fromCollectionId(collection.collectionId);
     const contract = helper.ethNativeContract.collection(address, 'nft', caller);
 
-    const cost = await recordEthFee(helper.api!, caller, () => contract.methods.transfer(receiver, tokenId).send(caller));
+    const cost = await helper.eth.calculateFee({Ethereum: caller}, () => contract.methods.transfer(receiver, tokenId).send(caller));
 
     const fee = Number(cost) / Number(helper.balance.getOneTokenNominal());
     const expectedFee = 0.15;
modifiedtests/src/eth/createNFTCollection.test.tsdiffbeforeafterboth
--- a/tests/src/eth/createNFTCollection.test.ts
+++ b/tests/src/eth/createNFTCollection.test.ts
@@ -17,8 +17,8 @@
 import {evmToAddress} from '@polkadot/util-crypto';
 import {IKeyringPair} from '@polkadot/types/types';
 import {expect, itEth, usingEthPlaygrounds} from './util/playgrounds';
-import {UNIQUE} from '../util/helpers';
 
+
 describe('Create NFT collection from EVM', () => {
   let donor: IKeyringPair;
 
@@ -65,7 +65,7 @@
 
     await collectionHelpers.methods
       .createNonfungibleCollection('A', 'A', 'A')
-      .send({value: Number(2n * UNIQUE)});
+      .send({value: Number(2n * helper.balance.getOneTokenNominal())});
     
     expect(await collectionHelpers.methods
       .isCollectionExist(expectedCollectionAddress)
@@ -147,10 +147,12 @@
 
 describe('(!negative tests!) Create NFT collection from EVM', () => {
   let donor: IKeyringPair;
+  let nominal: bigint;
 
   before(async function() {
-    await usingEthPlaygrounds(async (_helper, privateKey) => {
+    await usingEthPlaygrounds(async (helper, privateKey) => {
       donor = privateKey('//Alice');
+      nominal = helper.balance.getOneTokenNominal();
     });
   });
 
@@ -165,7 +167,7 @@
 
       await expect(collectionHelper.methods
         .createNonfungibleCollection(collectionName, description, tokenPrefix)
-        .call({value: Number(2n * UNIQUE)})).to.be.rejectedWith('name is too long. Max length is ' + MAX_NAME_LENGTH);
+        .call({value: Number(2n * nominal)})).to.be.rejectedWith('name is too long. Max length is ' + MAX_NAME_LENGTH);
       
     }
     {
@@ -175,7 +177,7 @@
       const tokenPrefix = 'A';
       await expect(collectionHelper.methods
         .createNonfungibleCollection(collectionName, description, tokenPrefix)
-        .call({value: Number(2n * UNIQUE)})).to.be.rejectedWith('description is too long. Max length is ' + MAX_DESCRIPTION_LENGTH);
+        .call({value: Number(2n * nominal)})).to.be.rejectedWith('description is too long. Max length is ' + MAX_DESCRIPTION_LENGTH);
     }
     {
       const MAX_TOKEN_PREFIX_LENGTH = 16;
@@ -184,7 +186,7 @@
       const tokenPrefix = 'A'.repeat(MAX_TOKEN_PREFIX_LENGTH + 1);
       await expect(collectionHelper.methods
         .createNonfungibleCollection(collectionName, description, tokenPrefix)
-        .call({value: Number(2n * UNIQUE)})).to.be.rejectedWith('token_prefix is too long. Max length is ' + MAX_TOKEN_PREFIX_LENGTH);
+        .call({value: Number(2n * nominal)})).to.be.rejectedWith('token_prefix is too long. Max length is ' + MAX_TOKEN_PREFIX_LENGTH);
     }
   });
   
@@ -193,7 +195,7 @@
     const collectionHelper = helper.ethNativeContract.collectionHelpers(owner);
     await expect(collectionHelper.methods
       .createNonfungibleCollection('Peasantry', 'absolutely anything', 'CVE')
-      .call({value: Number(1n * UNIQUE)})).to.be.rejectedWith('Sent amount not equals to collection creation price (2000000000000000000)');
+      .call({value: Number(1n * nominal)})).to.be.rejectedWith('Sent amount not equals to collection creation price (2000000000000000000)');
   });
 
   itEth('(!negative test!) Check owner', async ({helper}) => {
modifiedtests/src/eth/createRFTCollection.test.tsdiffbeforeafterboth
--- a/tests/src/eth/createRFTCollection.test.ts
+++ b/tests/src/eth/createRFTCollection.test.ts
@@ -18,8 +18,8 @@
 import {IKeyringPair} from '@polkadot/types/types';
 import {Pallets, requirePalletsOrSkip} from '../util/playgrounds';
 import {expect, itEth, usingEthPlaygrounds} from './util/playgrounds';
-import {UNIQUE} from '../util/helpers';
 
+
 describe('Create RFT collection from EVM', () => {
   let donor: IKeyringPair;
 
@@ -66,7 +66,7 @@
 
     await collectionHelpers.methods
       .createRFTCollection('A', 'A', 'A')
-      .send({value: Number(2n * UNIQUE)});
+      .send({value: Number(2n * helper.balance.getOneTokenNominal())});
     
     expect(await collectionHelpers.methods
       .isCollectionExist(expectedCollectionAddress)
@@ -148,11 +148,13 @@
 
 describe('(!negative tests!) Create RFT collection from EVM', () => {
   let donor: IKeyringPair;
+  let nominal: bigint;
 
   before(async function() {
     await usingEthPlaygrounds(async (helper, privateKey) => {
       requirePalletsOrSkip(this, helper, [Pallets.ReFungible]);
       donor = privateKey('//Alice');
+      nominal = helper.balance.getOneTokenNominal();
     });
   });
 
@@ -167,7 +169,7 @@
 
       await expect(collectionHelper.methods
         .createRFTCollection(collectionName, description, tokenPrefix)
-        .call({value: Number(2n * UNIQUE)})).to.be.rejectedWith('name is too long. Max length is ' + MAX_NAME_LENGTH);
+        .call({value: Number(2n * nominal)})).to.be.rejectedWith('name is too long. Max length is ' + MAX_NAME_LENGTH);
     }
     {
       const MAX_DESCRIPTION_LENGTH = 256;
@@ -176,7 +178,7 @@
       const tokenPrefix = 'A';
       await expect(collectionHelper.methods
         .createRFTCollection(collectionName, description, tokenPrefix)
-        .call({value: Number(2n * UNIQUE)})).to.be.rejectedWith('description is too long. Max length is ' + MAX_DESCRIPTION_LENGTH);
+        .call({value: Number(2n * nominal)})).to.be.rejectedWith('description is too long. Max length is ' + MAX_DESCRIPTION_LENGTH);
     }
     {
       const MAX_TOKEN_PREFIX_LENGTH = 16;
@@ -185,7 +187,7 @@
       const tokenPrefix = 'A'.repeat(MAX_TOKEN_PREFIX_LENGTH + 1);
       await expect(collectionHelper.methods
         .createRFTCollection(collectionName, description, tokenPrefix)
-        .call({value: Number(2n * UNIQUE)})).to.be.rejectedWith('token_prefix is too long. Max length is ' + MAX_TOKEN_PREFIX_LENGTH);
+        .call({value: Number(2n * nominal)})).to.be.rejectedWith('token_prefix is too long. Max length is ' + MAX_TOKEN_PREFIX_LENGTH);
     }
   });
   
@@ -194,7 +196,7 @@
     const collectionHelper = helper.ethNativeContract.collectionHelpers(owner);
     await expect(collectionHelper.methods
       .createRFTCollection('Peasantry', 'absolutely anything', 'TWIW')
-      .call({value: Number(1n * UNIQUE)})).to.be.rejectedWith('Sent amount not equals to collection creation price (2000000000000000000)');
+      .call({value: Number(1n * nominal)})).to.be.rejectedWith('Sent amount not equals to collection creation price (2000000000000000000)');
   });
 
   itEth('(!negative test!) Check owner', async ({helper}) => {
modifiedtests/src/eth/nonFungible.test.tsdiffbeforeafterboth
--- a/tests/src/eth/nonFungible.test.ts
+++ b/tests/src/eth/nonFungible.test.ts
@@ -17,8 +17,8 @@
 import {itEth, usingEthPlaygrounds, expect, EthUniqueHelper} from './util/playgrounds';
 import {IKeyringPair} from '@polkadot/types/types';
 import {Contract} from 'web3-eth-contract';
-import {UNIQUE} from '../util/helpers';
 
+
 describe('NFT: Information getting', () => {
   let donor: IKeyringPair;
   let alice: IKeyringPair;
@@ -84,7 +84,7 @@
     const receiver = helper.eth.createAccount();
 
     const collectionHelper = helper.ethNativeContract.collectionHelpers(owner);
-    let result = await collectionHelper.methods.createERC721MetadataCompatibleCollection('Mint collection', 'a', 'b', tokenPrefix).send({value: Number(2n * UNIQUE)});
+    let result = await collectionHelper.methods.createERC721MetadataCompatibleCollection('Mint collection', 'a', 'b', tokenPrefix).send({value: Number(2n * helper.balance.getOneTokenNominal())});
     const collectionAddress = helper.ethAddress.normalizeAddress(result.events.CollectionCreated.returnValues.collectionId);
     const contract = helper.ethNativeContract.collection(collectionAddress, 'nft', owner);
     
modifiedtests/src/eth/proxy/fungibleProxy.test.tsdiffbeforeafterboth
--- a/tests/src/eth/proxy/fungibleProxy.test.ts
+++ b/tests/src/eth/proxy/fungibleProxy.test.ts
@@ -14,7 +14,6 @@
 // You should have received a copy of the GNU General Public License
 // along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
 
-import {GAS_ARGS, normalizeEvents} from '../util/helpers';
 import {expect} from 'chai';
 import {readFile} from 'fs/promises';
 import {IKeyringPair} from '@polkadot/types/types';
@@ -26,7 +25,7 @@
   const web3 = helper.getWeb3();
   const proxyContract = new web3.eth.Contract(JSON.parse((await readFile(`${__dirname}/UniqueFungibleProxy.abi`)).toString()), undefined, {
     from: owner,
-    ...GAS_ARGS,
+    gas: helper.eth.DEFAULT_GAS,
   });
   const proxy = await proxyContract.deploy({data: (await readFile(`${__dirname}/UniqueFungibleProxy.bin`)).toString(), arguments: [wrapped.options.address]}).send({from: owner});
   return proxy;
@@ -94,7 +93,7 @@
 
     {
       const result = await contract.methods.approve(spender, 100).send({from: caller});
-      const events = normalizeEvents(result.events);
+      const events = helper.eth.normalizeEvents(result.events);
 
       expect(events).to.be.deep.equal([
         {
@@ -131,7 +130,7 @@
 
     {
       const result = await contract.methods.transferFrom(owner, receiver, 49).send({from: caller});
-      const events = normalizeEvents(result.events);
+      const events = helper.eth.normalizeEvents(result.events);
       expect(events).to.be.deep.equal([
         {
           address,
@@ -177,7 +176,7 @@
 
     {
       const result = await contract.methods.transfer(receiver, 50).send({from: caller});
-      const events = normalizeEvents(result.events);
+      const events = helper.eth.normalizeEvents(result.events);
       expect(events).to.be.deep.equal([
         {
           address,
modifiedtests/src/eth/proxy/nonFungibleProxy.test.tsdiffbeforeafterboth
--- a/tests/src/eth/proxy/nonFungibleProxy.test.ts
+++ b/tests/src/eth/proxy/nonFungibleProxy.test.ts
@@ -14,11 +14,10 @@
 // You should have received a copy of the GNU General Public License
 // along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
 
-import {GAS_ARGS, itWeb3, normalizeEvents} from '../util/helpers';
-import {expect} from 'chai';
 import {readFile} from 'fs/promises';
 import {IKeyringPair} from '@polkadot/types/types';
-import {EthUniqueHelper, itEth, usingEthPlaygrounds} from '../util/playgrounds';
+import {EthUniqueHelper, itEth, usingEthPlaygrounds, expect} from '../util/playgrounds';
+
 
 async function proxyWrap(helper: EthUniqueHelper, wrapped: any, donor: IKeyringPair) {
   // Proxy owner has no special privilegies, we don't need to reuse them
@@ -26,7 +25,7 @@
   const web3 = helper.getWeb3();
   const proxyContract = new web3.eth.Contract(JSON.parse((await readFile(`${__dirname}/UniqueNFTProxy.abi`)).toString()), undefined, {
     from: owner,
-    ...GAS_ARGS,
+    gas: helper.eth.DEFAULT_GAS,
   });
   const proxy = await proxyContract.deploy({data: (await readFile(`${__dirname}/UniqueNFTProxy.bin`)).toString(), arguments: [wrapped.options.address]}).send({from: owner});
   return proxy;
@@ -119,7 +118,7 @@
         nextTokenId,
         'Test URI',
       ).send({from: caller});
-      const events = normalizeEvents(result.events);
+      const events = helper.eth.normalizeEvents(result.events);
       events[0].address = events[0].address.toLocaleLowerCase();
 
       expect(events).to.be.deep.equal([
@@ -139,20 +138,16 @@
   });
 
   //TODO: CORE-302 add eth methods
-  itWeb3.skip('Can perform mintBulk()', async ({web3, api, privateKeyWrapper}) => {
-    /*
-    const collection = await createCollectionExpectSuccess({
-      mode: {type: 'NFT'},
-    });
-    const alice = privateKeyWrapper('//Alice');
+  itEth.skip('Can perform mintBulk()', async ({helper}) => {
+    const collection = await helper.nft.mintCollection(donor, {name: 'New', description: 'New collection', tokenPrefix: 'NEW'});
 
-    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const receiver = createEthAccount(web3);
+    const caller = await helper.eth.createAccountWithBalance(donor, 30n);
+    const receiver = helper.eth.createAccount();
 
-    const address = collectionIdToAddress(collection);
-    const contract = await proxyWrap(api, web3, new web3.eth.Contract(nonFungibleAbi as any, address, {from: caller, ...GAS_ARGS}), privateKeyWrapper);
-    const changeAdminTx = api.tx.unique.addCollectionAdmin(collection, {Ethereum: contract.options.address});
-    await submitTransactionAsync(alice, changeAdminTx);
+    const address = helper.ethAddress.fromCollectionId(collection.collectionId);
+    const evmCollection = helper.ethNativeContract.collection(address, 'nft', caller);
+    const contract = await proxyWrap(helper, evmCollection, donor);
+    await collection.addAdmin(donor, {Ethereum: contract.options.address});
 
     {
       const nextTokenId = await contract.methods.nextTokenId().call();
@@ -165,7 +160,7 @@
           [+nextTokenId + 2, 'Test URI 2'],
         ],
       ).send({from: caller});
-      const events = normalizeEvents(result.events);
+      const events = helper.eth.normalizeEvents(result.events);
 
       expect(events).to.be.deep.equal([
         {
@@ -201,7 +196,6 @@
       expect(await contract.methods.tokenURI(+nextTokenId + 1).call()).to.be.equal('Test URI 1');
       expect(await contract.methods.tokenURI(+nextTokenId + 2).call()).to.be.equal('Test URI 2');
     }
-    */
   });
 
   itEth('Can perform burn()', async ({helper}) => {
@@ -216,7 +210,7 @@
 
     {
       const result = await contract.methods.burn(tokenId).send({from: caller});
-      const events = normalizeEvents(result.events);
+      const events = helper.eth.normalizeEvents(result.events);
 
       expect(events).to.be.deep.equal([
         {
@@ -243,8 +237,8 @@
     const {tokenId} = await collection.mintToken(alice, {Ethereum: contract.options.address});
 
     {
-      const result = await contract.methods.approve(spender, tokenId).send({from: caller, ...GAS_ARGS});
-      const events = normalizeEvents(result.events);
+      const result = await contract.methods.approve(spender, tokenId).send({from: caller, gas: helper.eth.DEFAULT_GAS});
+      const events = helper.eth.normalizeEvents(result.events);
 
       expect(events).to.be.deep.equal([
         {
@@ -276,7 +270,7 @@
 
     {
       const result = await contract.methods.transferFrom(owner, receiver, tokenId).send({from: caller});
-      const events = normalizeEvents(result.events);
+      const events = helper.eth.normalizeEvents(result.events);
       expect(events).to.be.deep.equal([
         {
           address,
@@ -313,7 +307,7 @@
 
     {
       const result = await contract.methods.transfer(receiver, tokenId).send({from: caller});
-      const events = normalizeEvents(result.events);
+      const events = helper.eth.normalizeEvents(result.events);
       expect(events).to.be.deep.equal([
         {
           address,
modifiedtests/src/eth/reFungibleToken.test.tsdiffbeforeafterboth
--- a/tests/src/eth/reFungibleToken.test.ts
+++ b/tests/src/eth/reFungibleToken.test.ts
@@ -18,8 +18,8 @@
 import {EthUniqueHelper, expect, itEth, usingEthPlaygrounds} from './util/playgrounds';
 import {IKeyringPair} from '@polkadot/types/types';
 import {Contract} from 'web3-eth-contract';
-import {UNIQUE} from '../util/helpers';
 
+
 describe('Refungible token: Information getting', () => {
   let donor: IKeyringPair;
   let alice: IKeyringPair;
@@ -81,7 +81,7 @@
     const receiver = helper.eth.createAccount();
 
     const collectionHelper = helper.ethNativeContract.collectionHelpers(owner);
-    let result = await collectionHelper.methods.createERC721MetadataCompatibleCollection('Mint collection', 'a', 'b', tokenPrefix).send({value: Number(2n * UNIQUE)});
+    let result = await collectionHelper.methods.createERC721MetadataCompatibleCollection('Mint collection', 'a', 'b', tokenPrefix).send({value: Number(2n * helper.balance.getOneTokenNominal())});
     const collectionAddress = helper.ethAddress.normalizeAddress(result.events.CollectionCreated.returnValues.collectionId);
     const contract = helper.ethNativeContract.collection(collectionAddress, 'rft', owner);
     
deletedtests/src/eth/scheduling.test.tsdiffbeforeafterboth
--- a/tests/src/eth/scheduling.test.ts
+++ /dev/null
@@ -1,59 +0,0 @@
-// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.
-// This file is part of Unique Network.
-
-// Unique Network is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Unique Network is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
-
-import {expect} from 'chai';
-import {createEthAccountWithBalance, deployFlipper, GAS_ARGS, itWeb3, subToEth, transferBalanceToEth} from './util/helpers';
-import {scheduleExpectSuccess, waitNewBlocks, requirePallets, Pallets} from '../util/helpers';
-
-// TODO mrshiposha update this test in #581
-describe.skip('Scheduing EVM smart contracts', () => {
-  before(async function() {
-    await requirePallets(this, [Pallets.Scheduler]);
-  });
-
-  itWeb3('Successfully schedules and periodically executes an EVM contract', async ({api, web3, privateKeyWrapper}) => {
-    const deployer = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const flipper = await deployFlipper(web3, deployer);
-    const initialValue = await flipper.methods.getValue().call();
-    const alice = privateKeyWrapper('//Alice');
-    await transferBalanceToEth(api, alice, subToEth(alice.address));
-
-    {
-      const tx = api.tx.evm.call(
-        subToEth(alice.address),
-        flipper.options.address,
-        flipper.methods.flip().encodeABI(),
-        '0',
-        GAS_ARGS.gas,
-        await web3.eth.getGasPrice(),
-        null,
-        null,
-        [],
-      );
-      const waitForBlocks = 4;
-      const periodBlocks = 2;
-
-      await scheduleExpectSuccess(tx, alice, waitForBlocks, '0x' + '0'.repeat(32), periodBlocks, 2);
-      expect(await flipper.methods.getValue().call()).to.be.equal(initialValue);
-      
-      await waitNewBlocks(waitForBlocks - 1);
-      expect(await flipper.methods.getValue().call()).to.be.not.equal(initialValue);
-  
-      await waitNewBlocks(periodBlocks);
-      expect(await flipper.methods.getValue().call()).to.be.equal(initialValue);
-    }
-  });
-});
deletedtests/src/eth/util/helpers.d.tsdiffbeforeafterboth
--- a/tests/src/eth/util/helpers.d.ts
+++ /dev/null
@@ -1,17 +0,0 @@
-// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.
-// This file is part of Unique Network.
-
-// Unique Network is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Unique Network is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
-
-declare module 'solc';
\ No newline at end of file
deletedtests/src/eth/util/helpers.tsdiffbeforeafterboth
--- a/tests/src/eth/util/helpers.ts
+++ /dev/null
@@ -1,451 +0,0 @@
-// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.
-// This file is part of Unique Network.
-
-// Unique Network is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Unique Network is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
-
-// eslint-disable-next-line @typescript-eslint/triple-slash-reference
-/// <reference path="helpers.d.ts" />
-
-import {ApiPromise} from '@polkadot/api';
-import {IKeyringPair} from '@polkadot/types/types';
-import {addressToEvm, evmToAddress} from '@polkadot/util-crypto';
-import {expect} from 'chai';
-import * as solc from 'solc';
-import Web3 from 'web3';
-import config from '../../config';
-import getBalance from '../../substrate/get-balance';
-import usingApi, {submitTransactionAsync} from '../../substrate/substrate-api';
-import waitNewBlocks from '../../substrate/wait-new-blocks';
-import {CollectionMode, CrossAccountId, getDetailedCollectionInfo, getGenericResult, UNIQUE} from '../../util/helpers';
-import collectionHelpersAbi from '../collectionHelpersAbi.json';
-import fungibleAbi from '../fungibleAbi.json';
-import nonFungibleAbi from '../nonFungibleAbi.json';
-import refungibleAbi from '../reFungibleAbi.json';
-import refungibleTokenAbi from '../reFungibleTokenAbi.json';
-import contractHelpersAbi from './contractHelpersAbi.json';
-
-export const GAS_ARGS = {gas: 2500000};
-
-export enum SponsoringMode {
-  Disabled = 0,
-  Allowlisted = 1,
-  Generous = 2,
-}
-
-let web3Connected = false;
-export async function usingWeb3<T>(cb: (web3: Web3) => Promise<T> | T): Promise<T> {
-  if (web3Connected) throw new Error('do not nest usingWeb3 calls');
-  web3Connected = true;
-
-  const provider = new Web3.providers.WebsocketProvider(config.substrateUrl);
-  const web3 = new Web3(provider);
-
-  try {
-    return await cb(web3);
-  } finally {
-    // provider.disconnect(3000, 'normal disconnect');
-    provider.connection.close();
-    web3Connected = false;
-  }
-}
-
-function encodeIntBE(v: number): number[] {
-  if (v >= 0xffffffff || v < 0) throw new Error('id overflow');
-  return [
-    v >> 24,
-    (v >> 16) & 0xff,
-    (v >> 8) & 0xff,
-    v & 0xff,
-  ];
-}
-
-export async function getCollectionAddressFromResult(api: ApiPromise, result: any) {
-  const collectionIdAddress = normalizeAddress(result.events.CollectionCreated.returnValues.collectionId);
-  const collectionId = collectionIdFromAddress(collectionIdAddress);  
-  const collection = (await getDetailedCollectionInfo(api, collectionId))!;
-  return {collectionIdAddress, collectionId, collection};
-}
-
-export function collectionIdToAddress(collection: number): string {
-  const buf = Buffer.from([0x17, 0xc4, 0xe6, 0x45, 0x3c, 0xc4, 0x9a, 0xaa, 0xae, 0xac, 0xa8, 0x94, 0xe6, 0xd9, 0x68, 0x3e,
-    ...encodeIntBE(collection),
-  ]);
-  return Web3.utils.toChecksumAddress('0x' + buf.toString('hex'));
-}
-export function collectionIdFromAddress(address: string): number {
-  if (!address.startsWith('0x'))
-    throw 'address not starts with "0x"';
-  if (address.length > 42)
-    throw 'address length is more than 20 bytes';
-  return Number('0x' + address.substring(address.length - 8));
-}
-  
-export function normalizeAddress(address: string): string {
-  return '0x' + address.substring(address.length - 40);
-}
-
-export function tokenIdToAddress(collection: number, token: number): string {
-  const buf = Buffer.from([0xf8, 0x23, 0x8c, 0xcf, 0xff, 0x8e, 0xd8, 0x87, 0x46, 0x3f, 0xd5, 0xe0,
-    ...encodeIntBE(collection),
-    ...encodeIntBE(token),
-  ]);
-  return Web3.utils.toChecksumAddress('0x' + buf.toString('hex'));
-}
-
-export function tokenIdFromAddress(address: string) {
-  if (!address.startsWith('0x'))
-    throw 'address not starts with "0x"';
-  if (address.length > 42)
-    throw 'address length is more than 20 bytes';
-  return {
-    collectionId: Number('0x' + address.substring(address.length - 16, address.length - 8)),
-    tokenId: Number('0x' + address.substring(address.length - 8)),
-  };
-}
-
-export function tokenIdToCross(collection: number, token: number): CrossAccountId {
-  return {
-    Ethereum: tokenIdToAddress(collection, token),
-  };
-}
-
-export function createEthAccount(web3: Web3) {
-  const account = web3.eth.accounts.create();
-  web3.eth.accounts.wallet.add(account.privateKey);
-  return account.address;
-}
-
-export async function createEthAccountWithBalance(api: ApiPromise, web3: Web3, privateKeyWrapper: (account: string) => IKeyringPair) {
-  const alice = privateKeyWrapper('//Alice');
-  const account = createEthAccount(web3);
-  await transferBalanceToEth(api, alice, account);
-
-  return account;
-}
-
-export async function transferBalanceToEth(api: ApiPromise, source: IKeyringPair, target: string, amount = 1000n * UNIQUE) {
-  const tx = api.tx.balances.transfer(evmToAddress(target), amount);
-  const events = await submitTransactionAsync(source, tx);
-  const result = getGenericResult(events);
-  expect(result.success).to.be.true;
-}
-
-export async function createRFTCollection(api: ApiPromise, web3: Web3, owner: string) {
-  const collectionHelper = evmCollectionHelpers(web3, owner);
-  const result = await collectionHelper.methods
-    .createRFTCollection('A', 'B', 'C')
-    .send({value: Number(2n * UNIQUE)});
-  return await getCollectionAddressFromResult(api, result);
-}
-
-
-export async function createNonfungibleCollection(api: ApiPromise, web3: Web3, owner: string) {
-  const collectionHelper = evmCollectionHelpers(web3, owner);
-  const result = await collectionHelper.methods
-    .createNonfungibleCollection('A', 'B', 'C')
-    .send({value: Number(2n * UNIQUE)});
-  return await getCollectionAddressFromResult(api, result);
-}
-
-export function uniqueNFT(web3: Web3, address: string, owner: string) {
-  return new web3.eth.Contract(nonFungibleAbi as any, address, {
-    from: owner,
-    ...GAS_ARGS,
-  });
-}
-
-export function uniqueRefungible(web3: Web3, collectionAddress: string, owner: string) {
-  return new web3.eth.Contract(refungibleAbi as any, collectionAddress, {
-    from: owner,
-    ...GAS_ARGS,
-  });
-}
-
-export function uniqueRefungibleToken(web3: Web3, tokenAddress: string, owner: string | undefined = undefined) {
-  return new web3.eth.Contract(refungibleTokenAbi as any, tokenAddress, {
-    from: owner,
-    ...GAS_ARGS,
-  });
-}
-
-export async function itWeb3(name: string, cb: (apis: { web3: Web3, api: ApiPromise, privateKeyWrapper: (account: string) => IKeyringPair }) => any, opts: { only?: boolean, skip?: boolean } = {}) {
-  let i: any = it;
-  if (opts.only) i = i.only;
-  else if (opts.skip) i = i.skip;
-  i(name, async () => {
-    await usingApi(async (api, privateKeyWrapper) => {
-      await usingWeb3(async web3 => {
-        await cb({api, web3, privateKeyWrapper});
-      });
-    });
-  });
-}
-itWeb3.only = (name: string, cb: (apis: { web3: Web3, api: ApiPromise, privateKeyWrapper: (account: string) => IKeyringPair }) => any) => itWeb3(name, cb, {only: true});
-itWeb3.skip = (name: string, cb: (apis: { web3: Web3, api: ApiPromise, privateKeyWrapper: (account: string) => IKeyringPair }) => any) => itWeb3(name, cb, {skip: true});
-
-export async function generateSubstrateEthPair(web3: Web3) {
-  const account = web3.eth.accounts.create();
-  evmToAddress(account.address);
-}
-
-type NormalizedEvent = {
-    address: string,
-    event: string,
-    args: { [key: string]: string }
-};
-
-export function normalizeEvents(events: any): NormalizedEvent[] {
-  const output = [];
-  for (const key of Object.keys(events)) {
-    if (key.match(/^[0-9]+$/)) {
-      output.push(events[key]);
-    } else if (Array.isArray(events[key])) {
-      output.push(...events[key]);
-    } else {
-      output.push(events[key]);
-    }
-  }
-  output.sort((a, b) => a.logIndex - b.logIndex);
-  return output.map(({address, event, returnValues}) => {
-    const args: { [key: string]: string } = {};
-    for (const key of Object.keys(returnValues)) {
-      if (!key.match(/^[0-9]+$/)) {
-        args[key] = returnValues[key];
-      }
-    }
-    return {
-      address,
-      event,
-      args,
-    };
-  });
-}
-
-export async function recordEvents(contract: any, action: () => Promise<void>): Promise<NormalizedEvent[]> {
-  const out: any = [];
-  contract.events.allEvents((_: any, event: any) => {
-    out.push(event);
-  });
-  await action();
-  return normalizeEvents(out);
-}
-
-export function subToEthLowercase(eth: string): string {
-  const bytes = addressToEvm(eth);
-  return '0x' + Buffer.from(bytes).toString('hex');
-}
-
-export function subToEth(eth: string): string {
-  return Web3.utils.toChecksumAddress(subToEthLowercase(eth));
-}
-
-export interface CompiledContract {
-  abi: any,
-  object: string,
-}
-
-export function compileContract(name: string, src: string) : CompiledContract {
-  const out = JSON.parse(solc.compile(JSON.stringify({
-    language: 'Solidity',
-    sources: {
-      [`${name}.sol`]: {
-        content: `
-          // SPDX-License-Identifier: UNLICENSED
-          pragma solidity ^0.8.6;
-
-          ${src}
-        `,
-      },
-    },
-    settings: {
-      outputSelection: {
-        '*': {
-          '*': ['*'],
-        },
-      },
-    },
-  }))).contracts[`${name}.sol`][name];
-
-  return {
-    abi: out.abi,
-    object: '0x' + out.evm.bytecode.object,
-  };
-}
-
-export async function deployFlipper(web3: Web3, deployer: string) {
-  const compiled = compileContract('Flipper', `
-    contract Flipper {
-      bool value = false;
-      function flip() public {
-        value = !value;
-      }
-      function getValue() public view returns (bool) {
-        return value;
-      }
-    }
-  `);
-  const flipperContract = new web3.eth.Contract(compiled.abi, undefined, {
-    data: compiled.object,
-    from: deployer,
-    ...GAS_ARGS,
-  });
-  const flipper = await flipperContract.deploy({data: compiled.object}).send({from: deployer});
-
-  return flipper;
-}
-
-export async function deployCollector(web3: Web3, deployer: string) {
-  const compiled = compileContract('Collector', `
-    contract Collector {
-      uint256 collected;
-      fallback() external payable {
-        giveMoney();
-      }
-      function giveMoney() public payable {
-        collected += msg.value;
-      }
-      function getCollected() public view returns (uint256) {
-        return collected;
-      }
-      function getUnaccounted() public view returns (uint256) {
-        return address(this).balance - collected;
-      }
-
-      function withdraw(address payable target) public {
-        target.transfer(collected);
-        collected = 0;
-      }
-    }
-  `);
-  const collectorContract = new web3.eth.Contract(compiled.abi, undefined, {
-    data: compiled.object,
-    from: deployer,
-    ...GAS_ARGS,
-  });
-  const collector = await collectorContract.deploy({data: compiled.object}).send({from: deployer});
-
-  return collector;
-}
-
-/** 
- * pallet evm_contract_helpers
- * @param web3 
- * @param caller - eth address
- * @returns 
- */
-export function contractHelpers(web3: Web3, caller: string) {
-  return new web3.eth.Contract(contractHelpersAbi as any, '0x842899ECF380553E8a4de75bF534cdf6fBF64049', {from: caller, ...GAS_ARGS});
-}
-
-/** 
- * evm collection helper
- * @param web3 
- * @param caller - eth address
- * @returns 
- */
-export function evmCollectionHelpers(web3: Web3, caller: string) {
-  return new web3.eth.Contract(collectionHelpersAbi as any, '0x6c4e9fe1ae37a41e93cee429e8e1881abdcbb54f', {from: caller, ...GAS_ARGS});
-}
-
-/** 
- * evm collection
- * @param web3 
- * @param caller - eth address
- * @returns 
- */
-export function evmCollection(web3: Web3, caller: string, collection: string, mode: CollectionMode = {type: 'NFT'}) {
-  let abi;
-  switch (mode.type) {
-    case 'Fungible':
-      abi = fungibleAbi;
-      break;
-    
-    case 'NFT':
-      abi = nonFungibleAbi;
-      break;
-    
-    case 'ReFungible':
-      abi = refungibleAbi;
-      break;
-
-    default:
-      throw 'Bad collection mode';
-  }
-  const contract = new web3.eth.Contract(abi as any, collection, {from: caller, ...GAS_ARGS});
-  return contract;
-}
-
-/**
- * Execute ethereum method call using substrate account
- * @param to target contract
- * @param mkTx - closure, receiving `contract.methods`, and returning method call,
- * to be used as following (assuming `to` = erc20 contract):
- * `m => m.transfer(to, amount)`
- *
- * # Example
- * ```ts
- * executeEthTxOnSub(api, alice, erc20Contract, m => m.transfer(target, amount));
- * ```
- */
-export async function executeEthTxOnSub(web3: Web3, api: ApiPromise, from: IKeyringPair, to: any, mkTx: (methods: any) => any, {value = 0}: {value?: bigint | number} = { }) {
-  const tx = api.tx.evm.call(
-    subToEth(from.address),
-    to.options.address,
-    mkTx(to.methods).encodeABI(),
-    value,
-    GAS_ARGS.gas,
-    await web3.eth.getGasPrice(),
-    null,
-    null,
-    [],
-  );
-  const events = await submitTransactionAsync(from, tx);
-  expect(events.some(({event: {section, method}}) => section == 'evm' && method == 'Executed')).to.be.true;
-}
-
-export async function ethBalanceViaSub(api: ApiPromise, address: string): Promise<bigint> {
-  return (await getBalance(api, [evmToAddress(address)]))[0];
-}
-
-/**
- * Measure how much gas given closure consumes
- *
- * @param user which user balance will be checked
- */
-export async function recordEthFee(api: ApiPromise, user: string, call: () => Promise<any>): Promise<bigint> {
-  const before = await ethBalanceViaSub(api, user);
-
-  await call();
-
-  // In dev mode, the transaction might not finish processing in time
-  await waitNewBlocks(api, 1);
-  const after = await ethBalanceViaSub(api, user);
-
-  // Can't use .to.be.less, because chai doesn't supports bigint
-  expect(after < before).to.be.true;
-
-  return before - after;
-}
-
-type ElementOf<A> = A extends readonly (infer T)[] ? T : never;
-// I want a fancier api, not a memory efficiency
-export function* cartesian<T extends Array<Array<any>>, R extends Array<any>>(internalRest: [...R], ...args: [...T]): Generator<[...R, ...{[K in keyof T]: ElementOf<T[K]>}]> {
-  if(args.length === 0) {
-    yield internalRest as any;
-    return;
-  }
-  for(const value of args[0]) {
-    yield* cartesian([...internalRest, value], ...args.slice(1)) as any;
-  }
-}
\ No newline at end of file
modifiedtests/src/eth/util/playgrounds/unique.dev.tsdiffbeforeafterboth
--- a/tests/src/eth/util/playgrounds/unique.dev.ts
+++ b/tests/src/eth/util/playgrounds/unique.dev.ts
@@ -27,7 +27,7 @@
 import refungibleAbi from '../../reFungibleAbi.json';
 import refungibleTokenAbi from '../../reFungibleTokenAbi.json';
 import contractHelpersAbi from './../contractHelpersAbi.json';
-import {TEthereumAccount} from '../../../util/playgrounds/types';
+import {ICrossAccountId, TEthereumAccount} from '../../../util/playgrounds/types';
 
 class EthGroupBase {
   helper: EthUniqueHelper;
@@ -279,6 +279,15 @@
       };
     });
   }
+
+  async calculateFee(address: ICrossAccountId, code: () => Promise<any>): Promise<bigint> {
+    const wrappedCode = async () => {
+      await code();
+      // In dev mode, the transaction might not finish processing in time
+      await this.helper.wait.newBlocks(1);
+    };
+    return await this.helper.arrange.calculcateFee(address, wrappedCode);
+  }
 }  
 
 class EthAddressGroup extends EthGroupBase {
modifiedtests/src/inflation.test.tsdiffbeforeafterboth
--- a/tests/src/inflation.test.ts
+++ b/tests/src/inflation.test.ts
@@ -40,9 +40,9 @@
     const tx = helper.constructApiCall('api.tx.inflation.startInflation', [1]);
     await expect(helper.executeExtrinsic(superuser, 'api.tx.sudo.sudo', [tx])).to.not.be.rejected;
 
-    const blockInterval = (helper.api!.consts.inflation.inflationBlockInterval as any).toBigInt();
-    const totalIssuanceStart = ((await helper.api!.query.inflation.startingYearTotalIssuance()) as any).toBigInt();
-    const blockInflation = (await helper.api!.query.inflation.blockInflation() as any).toBigInt();
+    const blockInterval = (helper.getApi().consts.inflation.inflationBlockInterval as any).toBigInt();
+    const totalIssuanceStart = ((await helper.callRpc('api.query.inflation.startingYearTotalIssuance', [])) as any).toBigInt();
+    const blockInflation = (await helper.callRpc('api.query.inflation.blockInflation', []) as any).toBigInt();
 
     const YEAR = 5259600n;  // 6-second block. Blocks in one year
     // const YEAR = 2629800n; // 12-second block. Blocks in one year
modifiedtests/src/nesting/properties.test.tsdiffbeforeafterboth
--- a/tests/src/nesting/properties.test.ts
+++ b/tests/src/nesting/properties.test.ts
@@ -276,7 +276,7 @@
   
   itSub('Reads access rights to properties of a collection', async ({helper}) =>  {
     const collection = await helper.nft.mintCollection(alice);
-    const propertyRights = (await helper.api!.query.common.collectionPropertyPermissions(collection.collectionId)).toJSON();
+    const propertyRights = (await helper.callRpc('api.query.common.collectionPropertyPermissions', [collection.collectionId])).toJSON();
     expect(propertyRights).to.be.empty;
   });
   
@@ -817,7 +817,7 @@
       ).to.be.fulfilled;
     }
 
-    const originalSpace = await getConsumedSpace(token.collection.helper.api, token.collectionId, token.tokenId, pieces == 1n ? 'NFT' : 'RFT'); 
+    const originalSpace = await getConsumedSpace(token.collection.helper.getApi(), token.collectionId, token.tokenId, pieces == 1n ? 'NFT' : 'RFT'); 
     return originalSpace;
   }
 
@@ -840,7 +840,7 @@
       ).to.be.rejectedWith(/common\.NoPermission/);
     }
 
-    const consumedSpace = await getConsumedSpace(token.collection.helper.api, token.collectionId, token.tokenId, pieces == 1n ? 'NFT' : 'RFT'); 
+    const consumedSpace = await getConsumedSpace(token.collection.helper.getApi(), token.collectionId, token.tokenId, pieces == 1n ? 'NFT' : 'RFT'); 
     expect(consumedSpace).to.be.equal(originalSpace);
   }
 
@@ -875,7 +875,7 @@
       ).to.be.rejectedWith(/common\.NoPermission/);
     }
   
-    const consumedSpace = await getConsumedSpace(token.collection.helper.api, token.collectionId, token.tokenId, pieces == 1n ? 'NFT' : 'RFT'); 
+    const consumedSpace = await getConsumedSpace(token.collection.helper.getApi(), token.collectionId, token.tokenId, pieces == 1n ? 'NFT' : 'RFT'); 
     expect(consumedSpace).to.be.equal(originalSpace);
   }
 
@@ -911,7 +911,7 @@
 
     expect(await token.getProperties(['non-existent', 'now-existent'])).to.be.empty;
       
-    const consumedSpace = await getConsumedSpace(token.collection.helper.api, token.collectionId, token.tokenId, pieces == 1n ? 'NFT' : 'RFT'); 
+    const consumedSpace = await getConsumedSpace(token.collection.helper.getApi(), token.collectionId, token.tokenId, pieces == 1n ? 'NFT' : 'RFT'); 
     expect(consumedSpace).to.be.equal(originalSpace);
   }
 
@@ -951,7 +951,7 @@
     ])).to.be.rejectedWith(/common\.NoSpaceForProperty/);
   
     expect(await token.getProperties(['a_holy_book', 'young_years'])).to.be.empty;
-    const consumedSpace = await getConsumedSpace(token.collection.helper.api, token.collectionId, token.tokenId, pieces == 1n ? 'NFT' : 'RFT'); 
+    const consumedSpace = await getConsumedSpace(token.collection.helper.getApi(), token.collectionId, token.tokenId, pieces == 1n ? 'NFT' : 'RFT'); 
     expect(consumedSpace).to.be.equal(originalSpace);
   }
 
modifiedtests/src/pallet-presence.test.tsdiffbeforeafterboth
--- a/tests/src/pallet-presence.test.ts
+++ b/tests/src/pallet-presence.test.ts
@@ -59,7 +59,7 @@
 describe('Pallet presence', () => {
   before(async () => {
     await usingPlaygrounds(async helper => {
-      const chain = await helper.api!.rpc.system.chain();
+      const chain = await helper.callRpc('api.rpc.system.chain', []);
 
       const refungible = 'refungible';
       const scheduler = 'scheduler';
modifiedtests/src/rmrk/acceptNft.test.tsdiffbeforeafterboth
--- a/tests/src/rmrk/acceptNft.test.ts
+++ b/tests/src/rmrk/acceptNft.test.ts
@@ -8,7 +8,7 @@
 } from './util/tx';
 import {NftIdTuple} from './util/fetch';
 import {isNftChildOfAnother, expectTxFailure} from './util/helpers';
-import {requirePallets, Pallets} from '../util/helpers';
+import {requirePallets, Pallets} from '../deprecated-helpers/helpers';
 
 describe('integration test: accept NFT', () => {
   let api: any;
modifiedtests/src/rmrk/addResource.test.tsdiffbeforeafterboth
--- a/tests/src/rmrk/addResource.test.ts
+++ b/tests/src/rmrk/addResource.test.ts
@@ -12,7 +12,7 @@
   addNftComposableResource,
 } from './util/tx';
 import {RmrkTraitsResourceResourceInfo as ResourceInfo} from '@polkadot/types/lookup';
-import {requirePallets, Pallets} from '../util/helpers';
+import {requirePallets, Pallets} from '../deprecated-helpers/helpers';
 
 describe('integration test: add NFT resource', () => {
   const Alice = '//Alice';
modifiedtests/src/rmrk/addTheme.test.tsdiffbeforeafterboth
--- a/tests/src/rmrk/addTheme.test.ts
+++ b/tests/src/rmrk/addTheme.test.ts
@@ -3,7 +3,7 @@
 import {createBase, addTheme} from './util/tx';
 import {expectTxFailure} from './util/helpers';
 import {getThemeNames} from './util/fetch';
-import {requirePallets, Pallets} from '../util/helpers';
+import {requirePallets, Pallets} from '../deprecated-helpers/helpers';
 
 describe('integration test: add Theme to Base', () => {
   let api: any;
modifiedtests/src/rmrk/burnNft.test.tsdiffbeforeafterboth
--- a/tests/src/rmrk/burnNft.test.ts
+++ b/tests/src/rmrk/burnNft.test.ts
@@ -5,7 +5,7 @@
 
 import chai from 'chai';
 import chaiAsPromised from 'chai-as-promised';
-import {requirePallets, Pallets} from '../util/helpers';
+import {requirePallets, Pallets} from '../deprecated-helpers/helpers';
 
 chai.use(chaiAsPromised);
 const expect = chai.expect;
modifiedtests/src/rmrk/changeCollectionIssuer.test.tsdiffbeforeafterboth
--- a/tests/src/rmrk/changeCollectionIssuer.test.ts
+++ b/tests/src/rmrk/changeCollectionIssuer.test.ts
@@ -1,5 +1,5 @@
 import {getApiConnection} from '../substrate/substrate-api';
-import {requirePallets, Pallets} from '../util/helpers';
+import {requirePallets, Pallets} from '../deprecated-helpers/helpers';
 import {expectTxFailure} from './util/helpers';
 import {
   changeIssuer,
modifiedtests/src/rmrk/createBase.test.tsdiffbeforeafterboth
--- a/tests/src/rmrk/createBase.test.ts
+++ b/tests/src/rmrk/createBase.test.ts
@@ -1,5 +1,5 @@
 import {getApiConnection} from '../substrate/substrate-api';
-import {requirePallets, Pallets} from '../util/helpers';
+import {requirePallets, Pallets} from '../deprecated-helpers/helpers';
 import {createCollection, createBase} from './util/tx';
 
 describe('integration test: create new Base', () => {
modifiedtests/src/rmrk/createCollection.test.tsdiffbeforeafterboth
--- a/tests/src/rmrk/createCollection.test.ts
+++ b/tests/src/rmrk/createCollection.test.ts
@@ -1,5 +1,5 @@
 import {getApiConnection} from '../substrate/substrate-api';
-import {requirePallets, Pallets} from '../util/helpers';
+import {requirePallets, Pallets} from '../deprecated-helpers/helpers';
 import {createCollection} from './util/tx';
 
 describe('Integration test: create new collection', () => {
modifiedtests/src/rmrk/deleteCollection.test.tsdiffbeforeafterboth
--- a/tests/src/rmrk/deleteCollection.test.ts
+++ b/tests/src/rmrk/deleteCollection.test.ts
@@ -1,5 +1,5 @@
 import {getApiConnection} from '../substrate/substrate-api';
-import {requirePallets, Pallets} from '../util/helpers';
+import {requirePallets, Pallets} from '../deprecated-helpers/helpers';
 import {expectTxFailure} from './util/helpers';
 import {createCollection, deleteCollection} from './util/tx';
 
modifiedtests/src/rmrk/equipNft.test.tsdiffbeforeafterboth
--- a/tests/src/rmrk/equipNft.test.ts
+++ b/tests/src/rmrk/equipNft.test.ts
@@ -1,7 +1,7 @@
 import {ApiPromise} from '@polkadot/api';
 import {expect} from 'chai';
 import {getApiConnection} from '../substrate/substrate-api';
-import {requirePallets, Pallets} from '../util/helpers';
+import {requirePallets, Pallets} from '../deprecated-helpers/helpers';
 import {getNft, getParts, NftIdTuple} from './util/fetch';
 import {expectTxFailure} from './util/helpers';
 import {
modifiedtests/src/rmrk/getOwnedNfts.test.tsdiffbeforeafterboth
--- a/tests/src/rmrk/getOwnedNfts.test.ts
+++ b/tests/src/rmrk/getOwnedNfts.test.ts
@@ -1,6 +1,6 @@
 import {expect} from 'chai';
 import {getApiConnection} from '../substrate/substrate-api';
-import {requirePallets, Pallets} from '../util/helpers';
+import {requirePallets, Pallets} from '../deprecated-helpers/helpers';
 import {getOwnedNfts} from './util/fetch';
 import {mintNft, createCollection} from './util/tx';
 
modifiedtests/src/rmrk/lockCollection.test.tsdiffbeforeafterboth
--- a/tests/src/rmrk/lockCollection.test.ts
+++ b/tests/src/rmrk/lockCollection.test.ts
@@ -1,5 +1,5 @@
 import {getApiConnection} from '../substrate/substrate-api';
-import {requirePallets, Pallets} from '../util/helpers';
+import {requirePallets, Pallets} from '../deprecated-helpers/helpers';
 import {expectTxFailure} from './util/helpers';
 import {createCollection, lockCollection, mintNft} from './util/tx';
 
modifiedtests/src/rmrk/mintNft.test.tsdiffbeforeafterboth
--- a/tests/src/rmrk/mintNft.test.ts
+++ b/tests/src/rmrk/mintNft.test.ts
@@ -1,6 +1,6 @@
 import {expect} from 'chai';
 import {getApiConnection} from '../substrate/substrate-api';
-import {requirePallets, Pallets} from '../util/helpers';
+import {requirePallets, Pallets} from '../deprecated-helpers/helpers';
 import {getNft} from './util/fetch';
 import {expectTxFailure} from './util/helpers';
 import {createCollection, mintNft} from './util/tx';
modifiedtests/src/rmrk/rejectNft.test.tsdiffbeforeafterboth
--- a/tests/src/rmrk/rejectNft.test.ts
+++ b/tests/src/rmrk/rejectNft.test.ts
@@ -8,7 +8,7 @@
 } from './util/tx';
 import {getChildren, NftIdTuple} from './util/fetch';
 import {isNftChildOfAnother, expectTxFailure} from './util/helpers';
-import {requirePallets, Pallets} from '../util/helpers';
+import {requirePallets, Pallets} from '../deprecated-helpers/helpers';
 
 describe('integration test: reject NFT', () => {
   let api: any;
modifiedtests/src/rmrk/removeResource.test.tsdiffbeforeafterboth
--- a/tests/src/rmrk/removeResource.test.ts
+++ b/tests/src/rmrk/removeResource.test.ts
@@ -1,7 +1,7 @@
 import {expect} from 'chai';
 import privateKey from '../substrate/privateKey';
 import {executeTransaction, getApiConnection} from '../substrate/substrate-api';
-import {requirePallets, Pallets} from '../util/helpers';
+import {requirePallets, Pallets} from '../deprecated-helpers/helpers';
 import {getNft, NftIdTuple} from './util/fetch';
 import {expectTxFailure} from './util/helpers';
 import {
modifiedtests/src/rmrk/rmrkIsolation.test.tsdiffbeforeafterboth
--- a/tests/src/rmrk/rmrkIsolation.test.ts
+++ b/tests/src/rmrk/rmrkIsolation.test.ts
@@ -9,7 +9,7 @@
   requirePallets,
   normalizeAccountId,
   Pallets,
-} from '../util/helpers';
+} from '../deprecated-helpers/helpers';
 import {IKeyringPair} from '@polkadot/types/types';
 import {ApiPromise} from '@polkadot/api';
 import {it} from 'mocha';
modifiedtests/src/rmrk/sendNft.test.tsdiffbeforeafterboth
--- a/tests/src/rmrk/sendNft.test.ts
+++ b/tests/src/rmrk/sendNft.test.ts
@@ -3,7 +3,7 @@
 import {createCollection, mintNft, sendNft} from './util/tx';
 import {NftIdTuple} from './util/fetch';
 import {isNftChildOfAnother, expectTxFailure} from './util/helpers';
-import {requirePallets, Pallets} from '../util/helpers';
+import {requirePallets, Pallets} from '../deprecated-helpers/helpers';
 
 describe('integration test: send NFT', () => {
   let api: any;
modifiedtests/src/rmrk/setCollectionProperty.test.tsdiffbeforeafterboth
--- a/tests/src/rmrk/setCollectionProperty.test.ts
+++ b/tests/src/rmrk/setCollectionProperty.test.ts
@@ -1,5 +1,5 @@
 import {getApiConnection} from '../substrate/substrate-api';
-import {requirePallets, Pallets} from '../util/helpers';
+import {requirePallets, Pallets} from '../deprecated-helpers/helpers';
 import {expectTxFailure} from './util/helpers';
 import {createCollection, setPropertyCollection} from './util/tx';
 
modifiedtests/src/rmrk/setEquippableList.test.tsdiffbeforeafterboth
--- a/tests/src/rmrk/setEquippableList.test.ts
+++ b/tests/src/rmrk/setEquippableList.test.ts
@@ -1,5 +1,5 @@
 import {getApiConnection} from '../substrate/substrate-api';
-import {requirePallets, Pallets} from '../util/helpers';
+import {requirePallets, Pallets} from '../deprecated-helpers/helpers';
 import {expectTxFailure} from './util/helpers';
 import {createCollection, createBase, setEquippableList} from './util/tx';
 
modifiedtests/src/rmrk/setNftProperty.test.tsdiffbeforeafterboth
--- a/tests/src/rmrk/setNftProperty.test.ts
+++ b/tests/src/rmrk/setNftProperty.test.ts
@@ -1,5 +1,5 @@
 import {getApiConnection} from '../substrate/substrate-api';
-import {requirePallets, Pallets} from '../util/helpers';
+import {requirePallets, Pallets} from '../deprecated-helpers/helpers';
 import {NftIdTuple} from './util/fetch';
 import {expectTxFailure} from './util/helpers';
 import {createCollection, mintNft, sendNft, setNftProperty} from './util/tx';
modifiedtests/src/rmrk/setResourcePriorities.test.tsdiffbeforeafterboth
--- a/tests/src/rmrk/setResourcePriorities.test.ts
+++ b/tests/src/rmrk/setResourcePriorities.test.ts
@@ -1,5 +1,5 @@
 import {getApiConnection} from '../substrate/substrate-api';
-import {requirePallets, Pallets} from '../util/helpers';
+import {requirePallets, Pallets} from '../deprecated-helpers/helpers';
 import {expectTxFailure} from './util/helpers';
 import {mintNft, createCollection, setResourcePriorities} from './util/tx';
 
modifiedtests/src/substrate/get-balance.tsdiffbeforeafterboth
--- a/tests/src/substrate/get-balance.ts
+++ b/tests/src/substrate/get-balance.ts
@@ -19,7 +19,7 @@
 import promisifySubstrate from './promisify-substrate';
 import {IKeyringPair} from '@polkadot/types/types';
 import {submitTransactionAsync} from './substrate-api';
-import {getGenericResult} from '../util/helpers';
+import {getGenericResult} from '../deprecated-helpers/helpers';
 import {expect} from 'chai';
 
 export default async function getBalance(api: ApiPromise, accounts: string[]): Promise<Array<bigint>> {
modifiedtests/src/transfer.nload.tsdiffbeforeafterboth
--- a/tests/src/transfer.nload.ts
+++ b/tests/src/transfer.nload.ts
@@ -18,10 +18,24 @@
 import {IKeyringPair} from '@polkadot/types/types';
 import usingApi, {submitTransactionAsync} from './substrate/substrate-api';
 import waitNewBlocks from './substrate/wait-new-blocks';
-import {findUnusedAddresses} from './util/helpers';
 import * as cluster from 'cluster';
 import os from 'os';
 
+async function findUnusedAddress(api: ApiPromise, privateKeyWrapper: (account: string) => IKeyringPair, seedAddition = ''): Promise<IKeyringPair> {
+  let bal = 0n;
+  let unused;
+  do {
+    const randomSeed = 'seed' + Math.floor(Math.random() * Math.floor(10000)) + seedAddition;
+    unused = privateKeyWrapper(`//${randomSeed}`);
+    bal = (await api.query.system.account(unused.address)).data.free.toBigInt();
+  } while (bal !== 0n);
+  return unused;
+}
+
+function findUnusedAddresses(api: ApiPromise, privateKeyWrapper: (account: string) => IKeyringPair, amount: number): Promise<IKeyringPair[]> {
+  return Promise.all(new Array(amount).fill(null).map(() => findUnusedAddress(api, privateKeyWrapper, '_' + Date.now())));
+}
+
 // Innacurate transfer fee
 const FEE = 10n ** 8n;
 
modifiedtests/src/tx-version-presence.test.tsdiffbeforeafterboth
--- a/tests/src/tx-version-presence.test.ts
+++ b/tests/src/tx-version-presence.test.ts
@@ -22,7 +22,7 @@
 describe('TxVersion is present', () => {
   before(async () => {
     await usingPlaygrounds(async helper => {
-      metadata = await helper.api!.rpc.state.getMetadata();
+      metadata = await helper.callRpc('api.rpc.state.getMetadata', []);
     });
   });
 
deletedtests/src/util/contracthelpers.tsdiffbeforeafterboth
--- a/tests/src/util/contracthelpers.ts
+++ /dev/null
@@ -1,114 +0,0 @@
-// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.
-// This file is part of Unique Network.
-
-// Unique Network is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Unique Network is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
-
-import chai from 'chai';
-import chaiAsPromised from 'chai-as-promised';
-import {submitTransactionAsync, submitTransactionExpectFailAsync} from '../substrate/substrate-api';
-import fs from 'fs';
-import {Abi, CodePromise, ContractPromise as Contract} from '@polkadot/api-contract';
-import {IKeyringPair} from '@polkadot/types/types';
-import {ApiPromise} from '@polkadot/api';
-
-chai.use(chaiAsPromised);
-const expect = chai.expect;
-import {findUnusedAddress, getGenericResult} from '../util/helpers';
-
-const value = 0;
-const gasLimit = '200000000000';
-const endowment = '100000000000000000';
-
-/* eslint no-async-promise-executor: "off" */
-function deployContract(alice: IKeyringPair, code: CodePromise, constructor = 'default', ...args: any[]): Promise<Contract> {
-  return new Promise<Contract>(async (resolve) => {
-    const unsub = await (code as any)
-      .tx[constructor]({value: endowment, gasLimit}, ...args)
-      .signAndSend(alice, (result: any) => {
-        if (result.status.isInBlock || result.status.isFinalized) {
-          // here we have an additional field in the result, containing the blueprint
-          resolve((result as any).contract);
-          unsub();
-        }
-      });
-  });
-}
-
-async function prepareDeployer(api: ApiPromise, privateKeyWrapper: (account: string) => IKeyringPair) {
-  // Find unused address
-  const deployer = await findUnusedAddress(api, privateKeyWrapper);
-
-  // Transfer balance to it
-  const alice = privateKeyWrapper('//Alice');
-  const amount = BigInt(endowment) + 10n**15n;
-  const tx = api.tx.balances.transfer(deployer.address, amount);
-  await submitTransactionAsync(alice, tx);
-
-  return deployer;
-}
-
-export async function deployFlipper(api: ApiPromise, privateKeyWrapper: (account: string) => IKeyringPair): Promise<[Contract, IKeyringPair]> {
-  const metadata = JSON.parse(fs.readFileSync('./src/flipper/metadata.json').toString('utf-8'));
-  const abi = new Abi(metadata);
-
-  const deployer = await prepareDeployer(api, privateKeyWrapper);
-
-  const wasm = fs.readFileSync('./src/flipper/flipper.wasm');
-
-  const code = new CodePromise(api, abi, wasm);
-
-  const contract = (await deployContract(deployer, code, 'new', true)) as Contract;
-
-  const initialGetResponse = await getFlipValue(contract, deployer);
-  expect(initialGetResponse).to.be.true;
-
-  return [contract, deployer];
-}
-
-export async function getFlipValue(contract: Contract, deployer: IKeyringPair) {
-  const result = await contract.query.get(deployer.address, {value, gasLimit});
-
-  if(!result.result.isOk) {
-    throw 'Failed to get flipper value';
-  }
-  return (result.result.asOk.data[0] == 0x00) ? false : true;
-}
-
-export async function toggleFlipValueExpectSuccess(sender: IKeyringPair, contract: Contract) {
-  const tx = contract.tx.flip({value, gasLimit});
-  const events = await submitTransactionAsync(sender, tx);
-  const result = getGenericResult(events);
-
-  expect(result.success).to.be.true;
-}
-
-export async function toggleFlipValueExpectFailure(sender: IKeyringPair, contract: Contract) {
-  const tx = contract.tx.flip({value, gasLimit});
-  await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
-}
-
-export async function deployTransferContract(api: ApiPromise, privateKeyWrapper: (account: string) => IKeyringPair): Promise<[Contract, IKeyringPair]> {
-  const metadata = JSON.parse(fs.readFileSync('./src/transfer_contract/metadata.json').toString('utf-8'));
-  const abi = new Abi(metadata);
-
-  const deployer = await prepareDeployer(api, privateKeyWrapper);
-
-  const wasm = fs.readFileSync('./src/transfer_contract/nft_transfer.wasm');
-
-  const code = new CodePromise(api, abi, wasm);
-
-  const contract = await deployContract(deployer, code);
-
-  return [contract, deployer];
-}
deletedtests/src/util/helpers.tsdiffbeforeafterboth
--- a/tests/src/util/helpers.ts
+++ /dev/null
@@ -1,1879 +0,0 @@
-// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.
-// This file is part of Unique Network.
-
-// Unique Network is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Unique Network is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
-
-import '../interfaces/augment-api-rpc';
-import '../interfaces/augment-api-query';
-import {ApiPromise, Keyring} from '@polkadot/api';
-import type {AccountId, EventRecord, Event, BlockNumber} from '@polkadot/types/interfaces';
-import type {GenericEventData} from '@polkadot/types';
-import {AnyTuple, IEvent, IKeyringPair} from '@polkadot/types/types';
-import {evmToAddress} from '@polkadot/util-crypto';
-import {AnyNumber} from '@polkadot/types-codec/types';
-import BN from 'bn.js';
-import chai from 'chai';
-import chaiAsPromised from 'chai-as-promised';
-import {default as usingApi, executeTransaction, submitTransactionAsync, submitTransactionExpectFailAsync} from '../substrate/substrate-api';
-import {hexToStr, strToUTF16, utf16ToStr} from './util';
-import {UpDataStructsRpcCollection, UpDataStructsCreateItemData, UpDataStructsProperty} from '@polkadot/types/lookup';
-import {UpDataStructsTokenChild} from '../interfaces';
-import {Context} from 'mocha';
-
-chai.use(chaiAsPromised);
-const expect = chai.expect;
-
-export type CrossAccountId = {
-  Substrate: string,
-} | {
-  Ethereum: string,
-};
-
-
-export enum Pallets {
-  Inflation = 'inflation',
-  RmrkCore = 'rmrkcore',
-  RmrkEquip = 'rmrkequip',
-  ReFungible = 'refungible',
-  Fungible = 'fungible',
-  NFT = 'nonfungible',
-  Scheduler = 'scheduler',
-  AppPromotion = 'apppromotion',
-}
-
-export async function isUnique(): Promise<boolean> {
-  return usingApi(async api => {
-    const chain = await api.rpc.system.chain();
-
-    return chain.eq('UNIQUE');
-  });
-}
-
-export async function isQuartz(): Promise<boolean> {
-  return usingApi(async api => {
-    const chain = await api.rpc.system.chain();
-
-    return chain.eq('QUARTZ');
-  });
-}
-
-let modulesNames: any;
-export function getModuleNames(api: ApiPromise): string[] {
-  if (typeof modulesNames === 'undefined')
-    modulesNames = api.runtimeMetadata.asLatest.pallets.map(m => m.name.toString().toLowerCase());
-  return modulesNames;
-}
-
-export async function missingRequiredPallets(requiredPallets: string[]): Promise<string[]> {
-  return await usingApi(async api => {
-    const pallets = getModuleNames(api);
-
-    return requiredPallets.filter(p => !pallets.includes(p));
-  });
-}
-
-export async function checkPalletsPresence(requiredPallets: string[]): Promise<boolean> {
-  return (await missingRequiredPallets(requiredPallets)).length == 0;
-}
-
-export async function requirePallets(mocha: Context, requiredPallets: string[]) {
-  const missingPallets = await missingRequiredPallets(requiredPallets);
-
-  if (missingPallets.length > 0) {
-    const skippingTestMsg = `\tSkipping test "${mocha.test?.title}".`;
-    const missingPalletsMsg = `\tThe following pallets are missing:\n\t- ${missingPallets.join('\n\t- ')}`;
-    const skipMsg = `${skippingTestMsg}\n${missingPalletsMsg}`;
-
-    console.error('\x1b[38:5:208m%s\x1b[0m', skipMsg);
-
-    mocha.skip();
-  }
-}
-
-export function bigIntToSub(api: ApiPromise, number: bigint) {
-  return api.registry.createType('AccountId', '0x' + number.toString(16).padStart(64, '0')).toJSON();
-}
-
-export function bigIntToDecimals(number: bigint, decimals = 18): string {
-  const numberStr = number.toString();
-  const dotPos = numberStr.length - decimals;
-
-  if (dotPos <= 0) {
-    return '0.' + '0'.repeat(Math.abs(dotPos)) + numberStr;
-  } else {
-    const intPart = numberStr.substring(0, dotPos);
-    const fractPart = numberStr.substring(dotPos);
-    return intPart + '.' + fractPart;
-  }
-}
-
-export function normalizeAccountId(input: string | AccountId | CrossAccountId | IKeyringPair): CrossAccountId {
-  if (typeof input === 'string') {
-    if (input.length >= 47) {
-      return {Substrate: input};
-    } else if (input.length === 42 && input.startsWith('0x')) {
-      return {Ethereum: input.toLowerCase()};
-    } else if (input.length === 40 && !input.startsWith('0x')) {
-      return {Ethereum: '0x' + input.toLowerCase()};
-    } else {
-      throw new Error(`Unknown address format: "${input}"`);
-    }
-  }
-  if ('address' in input) {
-    return {Substrate: input.address};
-  }
-  if ('Ethereum' in input) {
-    return {
-      Ethereum: input.Ethereum.toLowerCase(),
-    };
-  } else if ('ethereum' in input) {
-    return {
-      Ethereum: (input as any).ethereum.toLowerCase(),
-    };
-  } else if ('Substrate' in input) {
-    return input;
-  } else if ('substrate' in input) {
-    return {
-      Substrate: (input as any).substrate,
-    };
-  }
-
-  // AccountId
-  return {Substrate: input.toString()};
-}
-export function toSubstrateAddress(input: string | CrossAccountId | IKeyringPair): string {
-  input = normalizeAccountId(input);
-  if ('Substrate' in input) {
-    return input.Substrate;
-  } else {
-    return evmToAddress(input.Ethereum);
-  }
-}
-
-export const U128_MAX = (1n << 128n) - 1n;
-
-const MICROUNIQUE = 1_000_000_000_000n;
-const MILLIUNIQUE = 1_000n * MICROUNIQUE;
-const CENTIUNIQUE = 10n * MILLIUNIQUE;
-export const UNIQUE = 100n * CENTIUNIQUE;
-
-interface GenericResult<T> {
-  success: boolean;
-  data: T | null;
-}
-
-interface CreateCollectionResult {
-  success: boolean;
-  collectionId: number;
-}
-
-interface CreateItemResult {
-  success: boolean;
-  collectionId: number;
-  itemId: number;
-  recipient?: CrossAccountId;
-  amount?: number;
-}
-
-interface DestroyItemResult {
-  success: boolean;
-  collectionId: number;
-  itemId: number;
-  owner: CrossAccountId;
-  amount: number;
-}
-
-interface TransferResult {
-  collectionId: number;
-  itemId: number;
-  sender?: CrossAccountId;
-  recipient?: CrossAccountId;
-  value: bigint;
-}
-
-interface IReFungibleOwner {
-  fraction: BN;
-  owner: number[];
-}
-
-interface IGetMessage {
-  checkMsgUnqMethod: string;
-  checkMsgTrsMethod: string;
-  checkMsgSysMethod: string;
-}
-
-export interface IFungibleTokenDataType {
-  value: number;
-}
-
-export interface IChainLimits {
-  collectionNumbersLimit: number;
-  accountTokenOwnershipLimit: number;
-  collectionsAdminsLimit: number;
-  customDataLimit: number;
-  nftSponsorTransferTimeout: number;
-  fungibleSponsorTransferTimeout: number;
-  refungibleSponsorTransferTimeout: number;
-  //offchainSchemaLimit: number;
-  //constOnChainSchemaLimit: number;
-}
-
-export interface IReFungibleTokenDataType {
-  owner: IReFungibleOwner[];
-}
-
-export function uniqueEventMessage(events: EventRecord[]): IGetMessage {
-  let checkMsgUnqMethod = '';
-  let checkMsgTrsMethod = '';
-  let checkMsgSysMethod = '';
-  events.forEach(({event: {method, section}}) => {
-    if (section === 'common') {
-      checkMsgUnqMethod = method;
-    } else if (section === 'treasury') {
-      checkMsgTrsMethod = method;
-    } else if (section === 'system') {
-      checkMsgSysMethod = method;
-    } else { return null; }
-  });
-  const result: IGetMessage = {
-    checkMsgUnqMethod,
-    checkMsgTrsMethod,
-    checkMsgSysMethod,
-  };
-  return result;
-}
-
-export function getEvent<T extends Event>(events: EventRecord[], check: (event: IEvent<AnyTuple>) => event is T): T | undefined {
-  const event = events.find(r => check(r.event));
-  if (!event) return;
-  return event.event as T;
-}
-
-export function getGenericResult<T>(events: EventRecord[]): GenericResult<T>;
-export function getGenericResult<T>(
-  events: EventRecord[],
-  expectSection: string,
-  expectMethod: string,
-  extractAction: (data: GenericEventData) => T
-): GenericResult<T>;
-
-export function getGenericResult<T>(
-  events: EventRecord[],
-  expectSection?: string,
-  expectMethod?: string,
-  extractAction?: (data: GenericEventData) => T,
-): GenericResult<T> {
-  let success = false;
-  let successData = null;
-
-  events.forEach(({event: {data, method, section}}) => {
-    // console.log(`    ${phase}: ${section}.${method}:: ${data}`);
-    if (method === 'ExtrinsicSuccess') {
-      success = true;
-    } else if ((expectSection == section) && (expectMethod == method)) {
-      successData = extractAction!(data as any);
-    }
-  });
-
-  const result: GenericResult<T> = {
-    success,
-    data: successData,
-  };
-  return result;
-}
-
-export function getCreateCollectionResult(events: EventRecord[]): CreateCollectionResult {
-  const genericResult = getGenericResult(events, 'common', 'CollectionCreated', (data) => parseInt(data[0].toString(), 10));
-  const result: CreateCollectionResult = {
-    success: genericResult.success,
-    collectionId: genericResult.data ?? 0,
-  };
-  return result;
-}
-
-export function getCreateItemsResult(events: EventRecord[]): CreateItemResult[] {
-  const results: CreateItemResult[] = [];
-
-  const genericResult = getGenericResult<CreateItemResult[]>(events, 'common', 'ItemCreated', (data) => {
-    const collectionId = parseInt(data[0].toString(), 10);
-    const itemId = parseInt(data[1].toString(), 10);
-    const recipient = normalizeAccountId(data[2].toJSON() as any);
-    const amount = parseInt(data[3].toString(), 10);
-
-    const itemRes: CreateItemResult = {
-      success: true,
-      collectionId,
-      itemId,
-      recipient,
-      amount,
-    };
-
-    results.push(itemRes);
-    return results;
-  });
-
-  if (!genericResult.success) return [];
-  return results;
-}
-
-export function getCreateItemResult(events: EventRecord[]): CreateItemResult {
-  const genericResult = getGenericResult(events, 'common', 'ItemCreated', (data) => data.map(function(value) { return value.toJSON(); }));
-
-  if (genericResult.data == null)
-    return {
-      success: genericResult.success,
-      collectionId: 0,
-      itemId: 0,
-      amount: 0,
-    };
-  else
-    return {
-      success: genericResult.success,
-      collectionId: genericResult.data[0] as number,
-      itemId: genericResult.data[1] as number,
-      recipient: normalizeAccountId(genericResult.data![2] as any),
-      amount: genericResult.data[3] as number,
-    };
-}
-
-export function getDestroyItemsResult(events: EventRecord[]): DestroyItemResult[] {
-  const results: DestroyItemResult[] = [];
-
-  const genericResult = getGenericResult<DestroyItemResult[]>(events, 'common', 'ItemDestroyed', (data) => {
-    const collectionId = parseInt(data[0].toString(), 10);
-    const itemId = parseInt(data[1].toString(), 10);
-    const owner = normalizeAccountId(data[2].toJSON() as any);
-    const amount = parseInt(data[3].toString(), 10);
-
-    const itemRes: DestroyItemResult = {
-      success: true,
-      collectionId,
-      itemId,
-      owner,
-      amount,
-    };
-
-    results.push(itemRes);
-    return results;
-  });
-
-  if (!genericResult.success) return [];
-  return results;
-}
-
-export function getTransferResult(api: ApiPromise, events: EventRecord[]): TransferResult {
-  for (const {event} of events) {
-    if (api.events.common.Transfer.is(event)) {
-      const [collection, token, sender, recipient, value] = event.data;
-      return {
-        collectionId: collection.toNumber(),
-        itemId: token.toNumber(),
-        sender: normalizeAccountId(sender.toJSON() as any),
-        recipient: normalizeAccountId(recipient.toJSON() as any),
-        value: value.toBigInt(),
-      };
-    }
-  }
-  throw new Error('no transfer event');
-}
-
-interface Nft {
-  type: 'NFT';
-}
-
-interface Fungible {
-  type: 'Fungible';
-  decimalPoints: number;
-}
-
-interface ReFungible {
-  type: 'ReFungible';
-}
-
-export type CollectionMode = Nft | Fungible | ReFungible;
-
-export type Property = {
-  key: any,
-  value: any,
-};
-
-type Permission = {
-  mutable: boolean;
-  collectionAdmin: boolean;
-  tokenOwner: boolean;
-}
-
-type PropertyPermission = {
-  key: any;
-  permission: Permission;
-}
-
-export type CreateCollectionParams = {
-  mode: CollectionMode,
-  name: string,
-  description: string,
-  tokenPrefix: string,
-  properties?: Array<Property>,
-  propPerm?: Array<PropertyPermission>
-};
-
-const defaultCreateCollectionParams: CreateCollectionParams = {
-  description: 'description',
-  mode: {type: 'NFT'},
-  name: 'name',
-  tokenPrefix: 'prefix',
-};
-
-export async function
-createCollection(
-  api: ApiPromise,
-  sender: IKeyringPair,
-  params: Partial<CreateCollectionParams> = {},
-): Promise<CreateCollectionResult> {
-  const {name, description, mode, tokenPrefix} = {...defaultCreateCollectionParams, ...params};
-
-  let modeprm = {};
-  if (mode.type === 'NFT') {
-    modeprm = {nft: null};
-  } else if (mode.type === 'Fungible') {
-    modeprm = {fungible: mode.decimalPoints};
-  } else if (mode.type === 'ReFungible') {
-    modeprm = {refungible: null};
-  }
-
-  const tx = api.tx.unique.createCollectionEx({
-    name: strToUTF16(name),
-    description: strToUTF16(description),
-    tokenPrefix: strToUTF16(tokenPrefix),
-    mode: modeprm as any,
-  });
-  const events = await executeTransaction(api, sender, tx);
-  return getCreateCollectionResult(events);
-}
-
-export async function createCollectionExpectSuccess(params: Partial<CreateCollectionParams> = {}): Promise<number> {
-  const {name, description, mode, tokenPrefix} = {...defaultCreateCollectionParams, ...params};
-
-  let collectionId = 0;
-  await usingApi(async (api, privateKeyWrapper) => {
-    // Get number of collections before the transaction
-    const collectionCountBefore = await getCreatedCollectionCount(api);
-
-    // Run the CreateCollection transaction
-    const alicePrivateKey = privateKeyWrapper('//Alice');
-
-    const result = await createCollection(api, alicePrivateKey, params);
-
-    // Get number of collections after the transaction
-    const collectionCountAfter = await getCreatedCollectionCount(api);
-
-    // Get the collection
-    const collection = await queryCollectionExpectSuccess(api, result.collectionId);
-
-    // What to expect
-    // tslint:disable-next-line:no-unused-expression
-    expect(result.success).to.be.true;
-    expect(result.collectionId).to.be.equal(collectionCountAfter);
-    // tslint:disable-next-line:no-unused-expression
-    expect(collection).to.be.not.null;
-    expect(collectionCountAfter).to.be.equal(collectionCountBefore + 1, 'Error: NFT collection NOT created.');
-    expect(collection.owner.toString()).to.be.equal(toSubstrateAddress(alicePrivateKey));
-    expect(utf16ToStr(collection.name.toJSON() as any)).to.be.equal(name);
-    expect(utf16ToStr(collection.description.toJSON() as any)).to.be.equal(description);
-    expect(hexToStr(collection.tokenPrefix.toJSON())).to.be.equal(tokenPrefix);
-
-    collectionId = result.collectionId;
-  });
-
-  return collectionId;
-}
-
-export async function createCollectionWithPropsExpectSuccess(params: Partial<CreateCollectionParams> = {}): Promise<number> {
-  const {name, description, mode, tokenPrefix} = {...defaultCreateCollectionParams, ...params};
-
-  let collectionId = 0;
-  await usingApi(async (api, privateKeyWrapper) => {
-    // Get number of collections before the transaction
-    const collectionCountBefore = await getCreatedCollectionCount(api);
-
-    // Run the CreateCollection transaction
-    const alicePrivateKey = privateKeyWrapper('//Alice');
-
-    let modeprm = {};
-    if (mode.type === 'NFT') {
-      modeprm = {nft: null};
-    } else if (mode.type === 'Fungible') {
-      modeprm = {fungible: mode.decimalPoints};
-    } else if (mode.type === 'ReFungible') {
-      modeprm = {refungible: null};
-    }
-
-    const tx = api.tx.unique.createCollectionEx({name: strToUTF16(name), description: strToUTF16(description), tokenPrefix: strToUTF16(tokenPrefix), mode: modeprm as any, properties: params.properties, tokenPropertyPermissions: params.propPerm});
-    const events = await submitTransactionAsync(alicePrivateKey, tx);
-    const result = getCreateCollectionResult(events);
-
-    // Get number of collections after the transaction
-    const collectionCountAfter = await getCreatedCollectionCount(api);
-
-    // Get the collection
-    const collection = await queryCollectionExpectSuccess(api, result.collectionId);
-
-    // What to expect
-    // tslint:disable-next-line:no-unused-expression
-    expect(result.success).to.be.true;
-    expect(result.collectionId).to.be.equal(collectionCountAfter);
-    // tslint:disable-next-line:no-unused-expression
-    expect(collection).to.be.not.null;
-    expect(collectionCountAfter).to.be.equal(collectionCountBefore + 1, 'Error: NFT collection NOT created.');
-    expect(collection.owner.toString()).to.be.equal(toSubstrateAddress(alicePrivateKey));
-    expect(utf16ToStr(collection.name.toJSON() as any)).to.be.equal(name);
-    expect(utf16ToStr(collection.description.toJSON() as any)).to.be.equal(description);
-    expect(hexToStr(collection.tokenPrefix.toJSON())).to.be.equal(tokenPrefix);
-
-
-    collectionId = result.collectionId;
-  });
-
-  return collectionId;
-}
-
-export async function createCollectionWithPropsExpectFailure(params: Partial<CreateCollectionParams> = {}) {
-  const {name, description, mode, tokenPrefix} = {...defaultCreateCollectionParams, ...params};
-
-  await usingApi(async (api, privateKeyWrapper) => {
-    // Get number of collections before the transaction
-    const collectionCountBefore = await getCreatedCollectionCount(api);
-
-    // Run the CreateCollection transaction
-    const alicePrivateKey = privateKeyWrapper('//Alice');
-
-    let modeprm = {};
-    if (mode.type === 'NFT') {
-      modeprm = {nft: null};
-    } else if (mode.type === 'Fungible') {
-      modeprm = {fungible: mode.decimalPoints};
-    } else if (mode.type === 'ReFungible') {
-      modeprm = {refungible: null};
-    }
-
-    const tx = api.tx.unique.createCollectionEx({name: strToUTF16(name), description: strToUTF16(description), tokenPrefix: strToUTF16(tokenPrefix), mode: modeprm as any, properties: params.properties, tokenPropertyPermissions: params.propPerm});
-    await expect(submitTransactionExpectFailAsync(alicePrivateKey, tx)).to.be.rejected;
-
-
-    // Get number of collections after the transaction
-    const collectionCountAfter = await getCreatedCollectionCount(api);
-
-    expect(collectionCountAfter).to.be.equal(collectionCountBefore, 'Error: Collection with incorrect data created.');
-  });
-}
-
-export async function createCollectionExpectFailure(params: Partial<CreateCollectionParams> = {}) {
-  const {name, description, mode, tokenPrefix} = {...defaultCreateCollectionParams, ...params};
-
-  let modeprm = {};
-  if (mode.type === 'NFT') {
-    modeprm = {nft: null};
-  } else if (mode.type === 'Fungible') {
-    modeprm = {fungible: mode.decimalPoints};
-  } else if (mode.type === 'ReFungible') {
-    modeprm = {refungible: null};
-  }
-
-  await usingApi(async (api, privateKeyWrapper) => {
-    // Get number of collections before the transaction
-    const collectionCountBefore = await getCreatedCollectionCount(api);
-
-    // Run the CreateCollection transaction
-    const alicePrivateKey = privateKeyWrapper('//Alice');
-    const tx = api.tx.unique.createCollectionEx({name: strToUTF16(name), description: strToUTF16(description), tokenPrefix: strToUTF16(tokenPrefix), mode: modeprm as any});
-    await expect(submitTransactionExpectFailAsync(alicePrivateKey, tx)).to.be.rejected;
-
-    // Get number of collections after the transaction
-    const collectionCountAfter = await getCreatedCollectionCount(api);
-
-    // What to expect
-    expect(collectionCountAfter).to.be.equal(collectionCountBefore, 'Error: Collection with incorrect data created.');
-  });
-}
-
-export async function findUnusedAddress(api: ApiPromise, privateKeyWrapper: (account: string) => IKeyringPair, seedAddition = ''): Promise<IKeyringPair> {
-  let bal = 0n;
-  let unused;
-  do {
-    const randomSeed = 'seed' + Math.floor(Math.random() * Math.floor(10000)) + seedAddition;
-    unused = privateKeyWrapper(`//${randomSeed}`);
-    bal = (await api.query.system.account(unused.address)).data.free.toBigInt();
-  } while (bal !== 0n);
-  return unused;
-}
-
-export async function getAllowance(api: ApiPromise, collectionId: number, owner: CrossAccountId | string | IKeyringPair, approved: CrossAccountId | string | IKeyringPair, tokenId: number) {
-  return (await api.rpc.unique.allowance(collectionId, normalizeAccountId(owner), normalizeAccountId(approved), tokenId)).toBigInt();
-}
-
-export function findUnusedAddresses(api: ApiPromise, privateKeyWrapper: (account: string) => IKeyringPair, amount: number): Promise<IKeyringPair[]> {
-  return Promise.all(new Array(amount).fill(null).map(() => findUnusedAddress(api, privateKeyWrapper, '_' + Date.now())));
-}
-
-export async function findNotExistingCollection(api: ApiPromise): Promise<number> {
-  const totalNumber = await getCreatedCollectionCount(api);
-  const newCollection: number = totalNumber + 1;
-  return newCollection;
-}
-
-function getDestroyResult(events: EventRecord[]): boolean {
-  let success = false;
-  events.forEach(({event: {method}}) => {
-    if (method == 'ExtrinsicSuccess') {
-      success = true;
-    }
-  });
-  return success;
-}
-
-export async function destroyCollectionExpectFailure(collectionId: number, senderSeed = '//Alice') {
-  await usingApi(async (api, privateKeyWrapper) => {
-    // Run the DestroyCollection transaction
-    const alicePrivateKey = privateKeyWrapper(senderSeed);
-    const tx = api.tx.unique.destroyCollection(collectionId);
-    await expect(submitTransactionExpectFailAsync(alicePrivateKey, tx)).to.be.rejected;
-  });
-}
-
-export async function destroyCollectionExpectSuccess(collectionId: number, senderSeed = '//Alice') {
-  await usingApi(async (api, privateKeyWrapper) => {
-    // Run the DestroyCollection transaction
-    const alicePrivateKey = privateKeyWrapper(senderSeed);
-    const tx = api.tx.unique.destroyCollection(collectionId);
-    const events = await submitTransactionAsync(alicePrivateKey, tx);
-    const result = getDestroyResult(events);
-    expect(result).to.be.true;
-
-    // What to expect
-    expect(await getDetailedCollectionInfo(api, collectionId)).to.be.null;
-  });
-}
-
-export async function setCollectionLimitsExpectSuccess(sender: IKeyringPair, collectionId: number, limits: any) {
-  await usingApi(async (api) => {
-    const tx = api.tx.unique.setCollectionLimits(collectionId, limits);
-    const events = await submitTransactionAsync(sender, tx);
-    const result = getGenericResult(events);
-
-    expect(result.success).to.be.true;
-  });
-}
-
-export const setCollectionPermissionsExpectSuccess = async (sender: IKeyringPair, collectionId: number, permissions: any) => {
-  await usingApi(async(api) => {
-    const tx = api.tx.unique.setCollectionPermissions(collectionId, permissions);
-    const events = await submitTransactionAsync(sender, tx);
-    const result = getGenericResult(events);
-
-    expect(result.success).to.be.true;
-  });
-};
-
-export async function setCollectionLimitsExpectFailure(sender: IKeyringPair, collectionId: number, limits: any) {
-  await usingApi(async (api) => {
-    const tx = api.tx.unique.setCollectionLimits(collectionId, limits);
-    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
-    const result = getGenericResult(events);
-
-    expect(result.success).to.be.false;
-  });
-}
-
-export async function setCollectionSponsorExpectSuccess(collectionId: number, sponsor: string, sender = '//Alice') {
-  await usingApi(async (api, privateKeyWrapper) => {
-
-    // Run the transaction
-    const senderPrivateKey = privateKeyWrapper(sender);
-    const tx = api.tx.unique.setCollectionSponsor(collectionId, sponsor);
-    const events = await submitTransactionAsync(senderPrivateKey, tx);
-    const result = getGenericResult(events);
-
-    // Get the collection
-    const collection = await queryCollectionExpectSuccess(api, collectionId);
-
-    // What to expect
-    expect(result.success).to.be.true;
-    expect(collection.sponsorship.toJSON()).to.deep.equal({
-      unconfirmed: sponsor,
-    });
-  });
-}
-
-export async function removeCollectionSponsorExpectSuccess(collectionId: number, sender = '//Alice') {
-  await usingApi(async (api, privateKeyWrapper) => {
-
-    // Run the transaction
-    const alicePrivateKey = privateKeyWrapper(sender);
-    const tx = api.tx.unique.removeCollectionSponsor(collectionId);
-    const events = await submitTransactionAsync(alicePrivateKey, tx);
-    const result = getGenericResult(events);
-
-    // Get the collection
-    const collection = await queryCollectionExpectSuccess(api, collectionId);
-
-    // What to expect
-    expect(result.success).to.be.true;
-    expect(collection.sponsorship.toJSON()).to.be.deep.equal({disabled: null});
-  });
-}
-
-export async function removeCollectionSponsorExpectFailure(collectionId: number, senderSeed = '//Alice') {
-  await usingApi(async (api, privateKeyWrapper) => {
-
-    // Run the transaction
-    const alicePrivateKey = privateKeyWrapper(senderSeed);
-    const tx = api.tx.unique.removeCollectionSponsor(collectionId);
-    await expect(submitTransactionExpectFailAsync(alicePrivateKey, tx)).to.be.rejected;
-  });
-}
-
-export async function setCollectionSponsorExpectFailure(collectionId: number, sponsor: string, senderSeed = '//Alice') {
-  await usingApi(async (api, privateKeyWrapper) => {
-
-    // Run the transaction
-    const alicePrivateKey = privateKeyWrapper(senderSeed);
-    const tx = api.tx.unique.setCollectionSponsor(collectionId, sponsor);
-    await expect(submitTransactionExpectFailAsync(alicePrivateKey, tx)).to.be.rejected;
-  });
-}
-
-export async function confirmSponsorshipExpectSuccess(collectionId: number, senderSeed = '//Alice') {
-  await usingApi(async (api, privateKeyWrapper) => {
-
-    // Run the transaction
-    const sender = privateKeyWrapper(senderSeed);
-    await confirmSponsorshipByKeyExpectSuccess(collectionId, sender);
-  });
-}
-
-export async function confirmSponsorshipByKeyExpectSuccess(collectionId: number, sender: IKeyringPair) {
-  await usingApi(async (api, privateKeyWrapper) => {
-
-    // Run the transaction
-    const tx = api.tx.unique.confirmSponsorship(collectionId);
-    const events = await submitTransactionAsync(sender, tx);
-    const result = getGenericResult(events);
-
-    // Get the collection
-    const collection = await queryCollectionExpectSuccess(api, collectionId);
-
-    // What to expect
-    expect(result.success).to.be.true;
-    expect(collection.sponsorship.toJSON()).to.be.deep.equal({
-      confirmed: sender.address,
-    });
-  });
-}
-
-
-export async function confirmSponsorshipExpectFailure(collectionId: number, senderSeed = '//Alice') {
-  await usingApi(async (api, privateKeyWrapper) => {
-
-    // Run the transaction
-    const sender = privateKeyWrapper(senderSeed);
-    const tx = api.tx.unique.confirmSponsorship(collectionId);
-    await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
-  });
-}
-
-export async function enableContractSponsoringExpectSuccess(sender: IKeyringPair, contractAddress: AccountId | string, enable: boolean) {
-  await usingApi(async (api) => {
-    const tx = api.tx.unique.enableContractSponsoring(contractAddress, enable);
-    const events = await submitTransactionAsync(sender, tx);
-    const result = getGenericResult(events);
-
-    expect(result.success).to.be.true;
-  });
-}
-
-export async function enableContractSponsoringExpectFailure(sender: IKeyringPair, contractAddress: AccountId | string, enable: boolean) {
-  await usingApi(async (api) => {
-    const tx = api.tx.unique.enableContractSponsoring(contractAddress, enable);
-    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
-    const result = getGenericResult(events);
-
-    expect(result.success).to.be.false;
-  });
-}
-
-export async function setTransferFlagExpectSuccess(sender: IKeyringPair, collectionId: number, enabled: boolean) {
-
-  await usingApi(async (api) => {
-
-    const tx = api.tx.unique.setTransfersEnabledFlag(collectionId, enabled);
-    const events = await submitTransactionAsync(sender, tx);
-    const result = getGenericResult(events);
-
-    expect(result.success).to.be.true;
-  });
-}
-
-export async function setTransferFlagExpectFailure(sender: IKeyringPair, collectionId: number, enabled: boolean) {
-
-  await usingApi(async (api) => {
-
-    const tx = api.tx.unique.setTransfersEnabledFlag(collectionId, enabled);
-    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
-    const result = getGenericResult(events);
-
-    expect(result.success).to.be.false;
-  });
-}
-
-export async function setContractSponsoringRateLimitExpectSuccess(sender: IKeyringPair, contractAddress: AccountId | string, rateLimit: number) {
-  await usingApi(async (api) => {
-    const tx = api.tx.unique.setContractSponsoringRateLimit(contractAddress, rateLimit);
-    const events = await submitTransactionAsync(sender, tx);
-    const result = getGenericResult(events);
-
-    expect(result.success).to.be.true;
-  });
-}
-
-export async function setContractSponsoringRateLimitExpectFailure(sender: IKeyringPair, contractAddress: AccountId | string, rateLimit: number) {
-  await usingApi(async (api) => {
-    const tx = api.tx.unique.setContractSponsoringRateLimit(contractAddress, rateLimit);
-    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
-    const result = getGenericResult(events);
-
-    expect(result.success).to.be.false;
-  });
-}
-
-export async function getNextSponsored(
-  api: ApiPromise,
-  collectionId: number,
-  account: string | CrossAccountId,
-  tokenId: number,
-): Promise<number> {
-  return Number((await api.rpc.unique.nextSponsored(collectionId, account, tokenId)).unwrapOr(-1));
-}
-
-export async function toggleContractAllowlistExpectSuccess(sender: IKeyringPair, contractAddress: AccountId | string, value = true) {
-  await usingApi(async (api) => {
-    const tx = api.tx.unique.toggleContractAllowList(contractAddress, value);
-    const events = await submitTransactionAsync(sender, tx);
-    const result = getGenericResult(events);
-
-    expect(result.success).to.be.true;
-  });
-}
-
-export async function isAllowlistedInContract(contractAddress: AccountId | string, user: string) {
-  let allowlisted = false;
-  await usingApi(async (api) => {
-    allowlisted = (await api.query.unique.contractAllowList(contractAddress, user)).toJSON() as boolean;
-  });
-  return allowlisted;
-}
-
-export async function addToContractAllowListExpectSuccess(sender: IKeyringPair, contractAddress: AccountId | string, user: AccountId | string) {
-  await usingApi(async (api) => {
-    const tx = api.tx.unique.addToContractAllowList(contractAddress.toString(), user.toString());
-    const events = await submitTransactionAsync(sender, tx);
-    const result = getGenericResult(events);
-
-    expect(result.success).to.be.true;
-  });
-}
-
-export async function removeFromContractAllowListExpectSuccess(sender: IKeyringPair, contractAddress: AccountId | string, user: AccountId | string) {
-  await usingApi(async (api) => {
-    const tx = api.tx.unique.removeFromContractAllowList(contractAddress.toString(), user.toString());
-    const events = await submitTransactionAsync(sender, tx);
-    const result = getGenericResult(events);
-
-    expect(result.success).to.be.true;
-  });
-}
-
-export async function removeFromContractAllowListExpectFailure(sender: IKeyringPair, contractAddress: AccountId | string, user: AccountId | string) {
-  await usingApi(async (api) => {
-    const tx = api.tx.unique.removeFromContractAllowList(contractAddress.toString(), user.toString());
-    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
-    const result = getGenericResult(events);
-
-    expect(result.success).to.be.false;
-  });
-}
-
-export interface CreateFungibleData {
-  readonly Value: bigint;
-}
-
-export interface CreateReFungibleData { }
-export interface CreateNftData { }
-
-export type CreateItemData = {
-  NFT: CreateNftData;
-} | {
-  Fungible: CreateFungibleData;
-} | {
-  ReFungible: CreateReFungibleData;
-};
-
-export async function burnItem(api: ApiPromise, sender: IKeyringPair, collectionId: number, tokenId: number, value: number | bigint) : Promise<boolean> {
-  const tx = api.tx.unique.burnItem(collectionId, tokenId, value);
-  const events = await submitTransactionAsync(sender, tx);
-  return getGenericResult(events).success;
-}
-
-export async function burnItemExpectSuccess(sender: IKeyringPair, collectionId: number, tokenId: number, value: number | bigint = 1) {
-  await usingApi(async (api) => {
-    const balanceBefore = await getBalance(api, collectionId, normalizeAccountId(sender), tokenId);
-    // if burning token by admin - use adminButnItemExpectSuccess
-    expect(balanceBefore >= BigInt(value)).to.be.true;
-
-    expect(await burnItem(api, sender, collectionId, tokenId, value)).to.be.true;
-
-    const balanceAfter = await getBalance(api, collectionId, normalizeAccountId(sender), tokenId);
-    expect(balanceAfter + BigInt(value)).to.be.equal(balanceBefore);
-  });
-}
-
-export async function burnItemExpectFailure(sender: IKeyringPair, collectionId: number, tokenId: number, value: number | bigint = 1) {
-  await usingApi(async (api) => {
-    const tx = api.tx.unique.burnItem(collectionId, tokenId, value);
-
-    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
-    const result = getCreateCollectionResult(events);
-    // tslint:disable-next-line:no-unused-expression
-    expect(result.success).to.be.false;
-  });
-}
-
-export async function burnFromExpectSuccess(sender: IKeyringPair, from: IKeyringPair | CrossAccountId, collectionId: number, tokenId: number, value: number | bigint = 1) {
-  await usingApi(async (api) => {
-    const tx = api.tx.unique.burnFrom(collectionId, normalizeAccountId(from), tokenId, value);
-    const events = await submitTransactionAsync(sender, tx);
-    return getGenericResult(events).success;
-  });
-}
-
-export async function
-approve(
-  api: ApiPromise,
-  collectionId: number,
-  tokenId: number, owner: IKeyringPair, approved: CrossAccountId | string | IKeyringPair, amount: number | bigint,
-) {
-  const approveUniqueTx = api.tx.unique.approve(normalizeAccountId(approved), collectionId, tokenId, amount);
-  const events = await submitTransactionAsync(owner, approveUniqueTx);
-  return getGenericResult(events).success;
-}
-
-export async function
-approveExpectSuccess(
-  collectionId: number,
-  tokenId: number, owner: IKeyringPair, approved: CrossAccountId | string, amount: number | bigint = 1,
-) {
-  await usingApi(async (api: ApiPromise) => {
-    const result = await approve(api, collectionId, tokenId, owner, approved, amount);
-    expect(result).to.be.true;
-
-    expect(await getAllowance(api, collectionId, owner, approved, tokenId)).to.be.equal(BigInt(amount));
-  });
-}
-
-export async function adminApproveFromExpectSuccess(
-  collectionId: number,
-  tokenId: number, admin: IKeyringPair, owner: CrossAccountId | string, approved: CrossAccountId | string, amount: number | bigint = 1,
-) {
-  await usingApi(async (api: ApiPromise) => {
-    const approveUniqueTx = api.tx.unique.approve(normalizeAccountId(approved), collectionId, tokenId, amount);
-    const events = await submitTransactionAsync(admin, approveUniqueTx);
-    const result = getGenericResult(events);
-    expect(result.success).to.be.true;
-
-    expect(await getAllowance(api, collectionId, owner, approved, tokenId)).to.be.equal(BigInt(amount));
-  });
-}
-
-export async function
-transferFrom(
-  api: ApiPromise,
-  collectionId: number,
-  tokenId: number,
-  accountApproved: IKeyringPair,
-  accountFrom: IKeyringPair | CrossAccountId,
-  accountTo: IKeyringPair | CrossAccountId,
-  value: number | bigint,
-) {
-  const from = normalizeAccountId(accountFrom);
-  const to = normalizeAccountId(accountTo);
-  const transferFromTx = api.tx.unique.transferFrom(from, to, collectionId, tokenId, value);
-  const events = await submitTransactionAsync(accountApproved, transferFromTx);
-  return getGenericResult(events).success;
-}
-
-export async function
-transferFromExpectSuccess(
-  collectionId: number,
-  tokenId: number,
-  accountApproved: IKeyringPair,
-  accountFrom: IKeyringPair | CrossAccountId,
-  accountTo: IKeyringPair | CrossAccountId,
-  value: number | bigint = 1,
-  type = 'NFT',
-) {
-  await usingApi(async (api: ApiPromise) => {
-    const from = normalizeAccountId(accountFrom);
-    const to = normalizeAccountId(accountTo);
-    let balanceBefore = 0n;
-    if (type === 'Fungible' || type === 'ReFungible') {
-      balanceBefore = await getBalance(api, collectionId, to, tokenId);
-    }
-    expect(await transferFrom(api, collectionId, tokenId, accountApproved, accountFrom, accountTo, value)).to.be.true;
-    if (type === 'NFT') {
-      expect(await getTokenOwner(api, collectionId, tokenId)).to.be.deep.equal(to);
-    }
-    if (type === 'Fungible') {
-      const balanceAfter = await getBalance(api, collectionId, to, tokenId);
-      if (JSON.stringify(to) !== JSON.stringify(from)) {
-        expect(balanceAfter - balanceBefore).to.be.equal(BigInt(value));
-      } else {
-        expect(balanceAfter).to.be.equal(balanceBefore);
-      }
-    }
-    if (type === 'ReFungible') {
-      expect(await getBalance(api, collectionId, to, tokenId)).to.be.equal(balanceBefore + BigInt(value));
-    }
-  });
-}
-
-export async function
-transferFromExpectFail(
-  collectionId: number,
-  tokenId: number,
-  accountApproved: IKeyringPair,
-  accountFrom: IKeyringPair,
-  accountTo: IKeyringPair,
-  value: number | bigint = 1,
-) {
-  await usingApi(async (api: ApiPromise) => {
-    const transferFromTx = api.tx.unique.transferFrom(normalizeAccountId(accountFrom.address), normalizeAccountId(accountTo.address), collectionId, tokenId, value);
-    const events = await expect(submitTransactionExpectFailAsync(accountApproved, transferFromTx)).to.be.rejected;
-    const result = getCreateCollectionResult(events);
-    // tslint:disable-next-line:no-unused-expression
-    expect(result.success).to.be.false;
-  });
-}
-
-/* eslint no-async-promise-executor: "off" */
-export async function getBlockNumber(api: ApiPromise): Promise<number> {
-  return new Promise<number>(async (resolve) => {
-    const unsubscribe = await api.rpc.chain.subscribeNewHeads((head) => {
-      unsubscribe();
-      resolve(head.number.toNumber());
-    });
-  });
-}
-
-export async function addCollectionAdminExpectSuccess(sender: IKeyringPair, collectionId: number, address: string | CrossAccountId) {
-  await usingApi(async (api) => {
-    const changeAdminTx = api.tx.unique.addCollectionAdmin(collectionId, normalizeAccountId(address));
-    const events = await submitTransactionAsync(sender, changeAdminTx);
-    const result = getCreateCollectionResult(events);
-    expect(result.success).to.be.true;
-  });
-}
-
-export async function adminApproveFromExpectFail(
-  collectionId: number,
-  tokenId: number, admin: IKeyringPair, owner: CrossAccountId | string, approved: CrossAccountId | string, amount: number | bigint = 1,
-) {
-  await usingApi(async (api: ApiPromise) => {
-    const approveUniqueTx = api.tx.unique.approve(normalizeAccountId(approved), collectionId, tokenId, amount);
-    const events = await expect(submitTransactionAsync(admin, approveUniqueTx)).to.be.rejected;
-    const result = getGenericResult(events);
-    expect(result.success).to.be.false;
-  });
-}
-
-export async function
-getFreeBalance(account: IKeyringPair): Promise<bigint> {
-  let balance = 0n;
-  await usingApi(async (api) => {
-    balance = BigInt((await api.query.system.account(account.address)).data.free.toString());
-  });
-
-  return balance;
-}
-
-export async function paraSiblingSovereignAccount(paraid: number): Promise<string> {
-  return usingApi(async api => {
-    // We are getting a *sibling* parachain sovereign account,
-    // so we need a sibling prefix: encoded(b"sibl") == 0x7369626c
-    const siblingPrefix = '0x7369626c';
-
-    const encodedParaId = api.createType('u32', paraid).toHex(true).substring(2);
-    const suffix = '000000000000000000000000000000000000000000000000';
-
-    return siblingPrefix + encodedParaId + suffix;
-  });
-}
-
-export async function transferBalanceTo(api: ApiPromise, source: IKeyringPair, target: string, amount = 1000n * UNIQUE) {
-  const tx = api.tx.balances.transfer(target, amount);
-  const events = await submitTransactionAsync(source, tx);
-  const result = getGenericResult(events);
-  expect(result.success).to.be.true;
-}
-
-export async function
-scheduleExpectSuccess(
-  operationTx: any,
-  sender: IKeyringPair,
-  blockSchedule: number,
-  scheduledId: string,
-  period = 1,
-  repetitions = 1,
-) {
-  await usingApi(async (api: ApiPromise) => {
-    const blockNumber: number | undefined = await getBlockNumber(api);
-    const expectedBlockNumber = blockNumber + blockSchedule;
-
-    expect(blockNumber).to.be.greaterThan(0);
-    const scheduleTx = api.tx.scheduler.scheduleNamed( // schedule
-      scheduledId,
-      expectedBlockNumber,
-      repetitions > 1 ? [period, repetitions] : null,
-      0,
-      {Value: operationTx as any},
-    );
-
-    const events = await submitTransactionAsync(sender, scheduleTx);
-    expect(getGenericResult(events).success).to.be.true;
-  });
-}
-
-export async function
-scheduleExpectFailure(
-  operationTx: any,
-  sender: IKeyringPair,
-  blockSchedule: number,
-  scheduledId: string,
-  period = 1,
-  repetitions = 1,
-) {
-  await usingApi(async (api: ApiPromise) => {
-    const blockNumber: number | undefined = await getBlockNumber(api);
-    const expectedBlockNumber = blockNumber + blockSchedule;
-
-    expect(blockNumber).to.be.greaterThan(0);
-    const scheduleTx = api.tx.scheduler.scheduleNamed( // schedule
-      scheduledId,
-      expectedBlockNumber,
-      repetitions <= 1 ? null : [period, repetitions],
-      0,
-      {Value: operationTx as any},
-    );
-
-    //const events =
-    await expect(submitTransactionExpectFailAsync(sender, scheduleTx)).to.be.rejected;
-    //expect(getGenericResult(events).success).to.be.false;
-  });
-}
-
-export async function
-scheduleTransferAndWaitExpectSuccess(
-  collectionId: number,
-  tokenId: number,
-  sender: IKeyringPair,
-  recipient: IKeyringPair,
-  value: number | bigint = 1,
-  blockSchedule: number,
-  scheduledId: string,
-) {
-  await usingApi(async (api: ApiPromise) => {
-    await scheduleTransferExpectSuccess(collectionId, tokenId, sender, recipient, value, blockSchedule, scheduledId);
-
-    const recipientBalanceBefore = (await api.query.system.account(recipient.address)).data.free.toBigInt();
-
-    // sleep for n + 1 blocks
-    await waitNewBlocks(blockSchedule + 1);
-
-    const recipientBalanceAfter = (await api.query.system.account(recipient.address)).data.free.toBigInt();
-
-    expect(await getTokenOwner(api, collectionId, tokenId)).to.be.deep.equal(normalizeAccountId(recipient.address));
-    expect(recipientBalanceAfter).to.be.equal(recipientBalanceBefore);
-  });
-}
-
-export async function
-scheduleTransferExpectSuccess(
-  collectionId: number,
-  tokenId: number,
-  sender: IKeyringPair,
-  recipient: IKeyringPair,
-  value: number | bigint = 1,
-  blockSchedule: number,
-  scheduledId: string,
-) {
-  await usingApi(async (api: ApiPromise) => {
-    const transferTx = api.tx.unique.transfer(normalizeAccountId(recipient.address), collectionId, tokenId, value);
-
-    await scheduleExpectSuccess(transferTx, sender, blockSchedule, scheduledId);
-
-    expect(await getTokenOwner(api, collectionId, tokenId)).to.be.deep.equal(normalizeAccountId(sender.address));
-  });
-}
-
-export async function
-scheduleTransferFundsPeriodicExpectSuccess(
-  amount: bigint,
-  sender: IKeyringPair,
-  recipient: IKeyringPair,
-  blockSchedule: number,
-  scheduledId: string,
-  period: number,
-  repetitions: number,
-) {
-  await usingApi(async (api: ApiPromise) => {
-    const transferTx = api.tx.balances.transfer(recipient.address, amount);
-
-    const balanceBefore = await getFreeBalance(recipient);
-
-    await scheduleExpectSuccess(transferTx, sender, blockSchedule, scheduledId, period, repetitions);
-
-    expect(await getFreeBalance(recipient)).to.be.equal(balanceBefore);
-  });
-}
-
-export async function
-transfer(
-  api: ApiPromise,
-  collectionId: number,
-  tokenId: number,
-  sender: IKeyringPair,
-  recipient: IKeyringPair | CrossAccountId,
-  value: number | bigint,
-) : Promise<boolean> {
-  const transferTx = api.tx.unique.transfer(normalizeAccountId(recipient), collectionId, tokenId, value);
-  const events = await executeTransaction(api, sender, transferTx);
-  return getGenericResult(events).success;
-}
-
-export async function
-transferExpectSuccess(
-  collectionId: number,
-  tokenId: number,
-  sender: IKeyringPair,
-  recipient: IKeyringPair | CrossAccountId,
-  value: number | bigint = 1,
-  type = 'NFT',
-) {
-  await usingApi(async (api: ApiPromise) => {
-    const from = normalizeAccountId(sender);
-    const to = normalizeAccountId(recipient);
-
-    let balanceBefore = 0n;
-    if (type === 'Fungible' || type === 'ReFungible') {
-      balanceBefore = await getBalance(api, collectionId, to, tokenId);
-    }
-
-    const transferTx = api.tx.unique.transfer(normalizeAccountId(recipient), collectionId, tokenId, value);
-    const events = await executeTransaction(api, sender, transferTx);
-    const result = getTransferResult(api, events);
-
-    expect(result.collectionId).to.be.equal(collectionId);
-    expect(result.itemId).to.be.equal(tokenId);
-    expect(result.sender).to.be.deep.equal(normalizeAccountId(sender.address));
-    expect(result.recipient).to.be.deep.equal(to);
-    expect(result.value).to.be.equal(BigInt(value));
-
-    if (type === 'NFT') {
-      expect(await getTokenOwner(api, collectionId, tokenId)).to.be.deep.equal(to);
-    }
-    if (type === 'Fungible' || type === 'ReFungible') {
-      const balanceAfter = await getBalance(api, collectionId, to, tokenId);
-      if (JSON.stringify(to) !== JSON.stringify(from)) {
-        expect(balanceAfter - balanceBefore).to.be.equal(BigInt(value));
-      } else {
-        expect(balanceAfter).to.be.equal(balanceBefore);
-      }
-    }
-  });
-}
-
-export async function
-transferExpectFailure(
-  collectionId: number,
-  tokenId: number,
-  sender: IKeyringPair,
-  recipient: IKeyringPair | CrossAccountId,
-  value: number | bigint = 1,
-) {
-  await usingApi(async (api: ApiPromise) => {
-    const transferTx = api.tx.unique.transfer(normalizeAccountId(recipient), collectionId, tokenId, value);
-    const events = await expect(submitTransactionExpectFailAsync(sender, transferTx)).to.be.rejected;
-    const result = getGenericResult(events);
-    // if (events && Array.isArray(events)) {
-    //   const result = getCreateCollectionResult(events);
-    // tslint:disable-next-line:no-unused-expression
-    expect(result.success).to.be.false;
-    //}
-  });
-}
-
-export async function
-approveExpectFail(
-  collectionId: number,
-  tokenId: number, owner: IKeyringPair, approved: IKeyringPair, amount: number | bigint = 1,
-) {
-  await usingApi(async (api: ApiPromise) => {
-    const approveUniqueTx = api.tx.unique.approve(normalizeAccountId(approved.address), collectionId, tokenId, amount);
-    const events = await expect(submitTransactionExpectFailAsync(owner, approveUniqueTx)).to.be.rejected;
-    const result = getCreateCollectionResult(events);
-    // tslint:disable-next-line:no-unused-expression
-    expect(result.success).to.be.false;
-  });
-}
-
-export async function getBalance(
-  api: ApiPromise,
-  collectionId: number,
-  owner: string | CrossAccountId | IKeyringPair,
-  token: number,
-): Promise<bigint> {
-  return (await api.rpc.unique.balance(collectionId, normalizeAccountId(owner), token)).toBigInt();
-}
-export async function getTokenOwner(
-  api: ApiPromise,
-  collectionId: number,
-  token: number,
-): Promise<CrossAccountId> {
-  const owner = (await api.rpc.unique.tokenOwner(collectionId, token)).toJSON() as any;
-  if (owner == null) throw new Error('owner == null');
-  return normalizeAccountId(owner);
-}
-export async function getTopmostTokenOwner(
-  api: ApiPromise,
-  collectionId: number,
-  token: number,
-): Promise<CrossAccountId> {
-  const owner = (await api.rpc.unique.topmostTokenOwner(collectionId, token)).toJSON() as any;
-  if (owner == null) throw new Error('owner == null');
-  return normalizeAccountId(owner);
-}
-export async function getTokenChildren(
-  api: ApiPromise,
-  collectionId: number,
-  tokenId: number,
-): Promise<UpDataStructsTokenChild[]> {
-  return (await api.rpc.unique.tokenChildren(collectionId, tokenId)).toJSON() as any;
-}
-export async function isTokenExists(
-  api: ApiPromise,
-  collectionId: number,
-  token: number,
-): Promise<boolean> {
-  return (await api.rpc.unique.tokenExists(collectionId, token)).toJSON();
-}
-export async function getLastTokenId(
-  api: ApiPromise,
-  collectionId: number,
-): Promise<number> {
-  return (await api.rpc.unique.lastTokenId(collectionId)).toJSON();
-}
-export async function getAdminList(
-  api: ApiPromise,
-  collectionId: number,
-): Promise<string[]> {
-  return (await api.rpc.unique.adminlist(collectionId)).toHuman() as any;
-}
-export async function getTokenProperties(
-  api: ApiPromise,
-  collectionId: number,
-  tokenId: number,
-  propertyKeys: string[],
-): Promise<UpDataStructsProperty[]> {
-  return (await api.rpc.unique.tokenProperties(collectionId, tokenId, propertyKeys)).toHuman() as any;
-}
-
-export async function createFungibleItemExpectSuccess(
-  sender: IKeyringPair,
-  collectionId: number,
-  data: CreateFungibleData,
-  owner: CrossAccountId | string = sender.address,
-) {
-  return await usingApi(async (api) => {
-    const tx = api.tx.unique.createItem(collectionId, normalizeAccountId(owner), {Fungible: data});
-
-    const events = await submitTransactionAsync(sender, tx);
-    const result = getCreateItemResult(events);
-
-    expect(result.success).to.be.true;
-    return result.itemId;
-  });
-}
-
-export async function createMultipleItemsExpectSuccess(sender: IKeyringPair, collectionId: number, itemsData: any, owner: CrossAccountId | string = sender.address) {
-  await usingApi(async (api) => {
-    const to = normalizeAccountId(owner);
-    const tx = api.tx.unique.createMultipleItems(collectionId, to, itemsData);
-
-    const events = await submitTransactionAsync(sender, tx);
-    expect(getGenericResult(events).success).to.be.true;
-  });
-}
-
-export async function createMultipleItemsWithPropsExpectSuccess(sender: IKeyringPair, collectionId: number, itemsData: any, owner: CrossAccountId | string = sender.address) {
-  await usingApi(async (api) => {
-    const to = normalizeAccountId(owner);
-    const tx = api.tx.unique.createMultipleItems(collectionId, to, itemsData);
-
-    const events = await submitTransactionAsync(sender, tx);
-    const result = getCreateItemsResult(events);
-
-    for (const res of result) {
-      expect(await api.rpc.unique.tokenProperties(collectionId, res.itemId)).not.to.be.empty;
-    }
-  });
-}
-
-export async function createMultipleItemsExWithPropsExpectSuccess(sender: IKeyringPair, collectionId: number, itemsData: any) {
-  await usingApi(async (api) => {
-    const tx = api.tx.unique.createMultipleItemsEx(collectionId, itemsData);
-
-    const events = await submitTransactionAsync(sender, tx);
-    const result = getCreateItemsResult(events);
-
-    for (const res of result) {
-      expect(await api.rpc.unique.tokenProperties(collectionId, res.itemId)).not.to.be.empty;
-    }
-  });
-}
-
-export async function createItemWithPropsExpectSuccess(sender: IKeyringPair, collectionId: number, createMode: string, props:  Array<Property>, owner: CrossAccountId | string = sender.address) {
-  let newItemId = 0;
-  await usingApi(async (api) => {
-    const to = normalizeAccountId(owner);
-    const itemCountBefore = await getLastTokenId(api, collectionId);
-    const itemBalanceBefore = await getBalance(api, collectionId, to, newItemId);
-
-    let tx;
-    if (createMode === 'Fungible') {
-      const createData = {fungible: {value: 10}};
-      tx = api.tx.unique.createItem(collectionId, to, createData as any);
-    } else if (createMode === 'ReFungible') {
-      const createData = {refungible: {pieces: 100}};
-      tx = api.tx.unique.createItem(collectionId, to, createData as any);
-    } else {
-      const data = api.createType('UpDataStructsCreateItemData', {NFT: {properties: props}});
-      tx = api.tx.unique.createItem(collectionId, to, data as UpDataStructsCreateItemData);
-    }
-
-    const events = await submitTransactionAsync(sender, tx);
-    const result = getCreateItemResult(events);
-
-    const itemCountAfter = await getLastTokenId(api, collectionId);
-    const itemBalanceAfter = await getBalance(api, collectionId, to, newItemId);
-
-    if (createMode === 'NFT') {
-      expect(await api.rpc.unique.tokenProperties(collectionId, result.itemId)).not.to.be.empty;
-    }
-
-    // What to expect
-    // tslint:disable-next-line:no-unused-expression
-    expect(result.success).to.be.true;
-    if (createMode === 'Fungible') {
-      expect(itemBalanceAfter - itemBalanceBefore).to.be.equal(10n);
-    } else {
-      expect(itemCountAfter).to.be.equal(itemCountBefore + 1);
-    }
-    expect(collectionId).to.be.equal(result.collectionId);
-    expect(itemCountAfter.toString()).to.be.equal(result.itemId.toString());
-    expect(to).to.be.deep.equal(result.recipient);
-    newItemId = result.itemId;
-  });
-  return newItemId;
-}
-
-export async function createItemWithPropsExpectFailure(sender: IKeyringPair, collectionId: number, createMode: string, props: Array<Property>, owner: CrossAccountId | string = sender.address) {
-  await usingApi(async (api) => {
-
-    let tx;
-    if (createMode === 'NFT') {
-      const data = api.createType('UpDataStructsCreateItemData', {NFT: {properties: props}}) as UpDataStructsCreateItemData;
-      tx = api.tx.unique.createItem(collectionId, normalizeAccountId(owner), data);
-    } else {
-      tx = api.tx.unique.createItem(collectionId, normalizeAccountId(owner), createMode);
-    }
-
-
-    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
-    if(events.message && events.message.toString().indexOf('1002: Verification Error') > -1) return;
-    const result = getCreateItemResult(events);
-
-    expect(result.success).to.be.false;
-  });
-}
-
-export async function createItemExpectSuccess(sender: IKeyringPair, collectionId: number, createMode: string, owner: CrossAccountId | string = sender.address) {
-  let newItemId = 0;
-  await usingApi(async (api) => {
-    const to = normalizeAccountId(owner);
-    const itemCountBefore = await getLastTokenId(api, collectionId);
-    const itemBalanceBefore = await getBalance(api, collectionId, to, newItemId);
-
-    let tx;
-    if (createMode === 'Fungible') {
-      const createData = {fungible: {value: 10}};
-      tx = api.tx.unique.createItem(collectionId, to, createData as any);
-    } else if (createMode === 'ReFungible') {
-      const createData = {refungible: {pieces: 100}};
-      tx = api.tx.unique.createItem(collectionId, to, createData as any);
-    } else {
-      const createData = {nft: {}};
-      tx = api.tx.unique.createItem(collectionId, to, createData as any);
-    }
-
-    const events = await executeTransaction(api, sender, tx);
-    const result = getCreateItemResult(events);
-
-    const itemCountAfter = await getLastTokenId(api, collectionId);
-    const itemBalanceAfter = await getBalance(api, collectionId, to, newItemId);
-
-    // What to expect
-    // tslint:disable-next-line:no-unused-expression
-    expect(result.success).to.be.true;
-    if (createMode === 'Fungible') {
-      expect(itemBalanceAfter - itemBalanceBefore).to.be.equal(10n);
-    } else {
-      expect(itemCountAfter).to.be.equal(itemCountBefore + 1);
-    }
-    expect(collectionId).to.be.equal(result.collectionId);
-    expect(itemCountAfter.toString()).to.be.equal(result.itemId.toString());
-    expect(to).to.be.deep.equal(result.recipient);
-    newItemId = result.itemId;
-  });
-  return newItemId;
-}
-
-export async function createRefungibleToken(api: ApiPromise, sender: IKeyringPair, collectionId: number, amount: bigint, owner: CrossAccountId | IKeyringPair | string = sender.address) : Promise<CreateItemResult> {
-  const createData = {refungible: {pieces: amount}};
-  const tx = api.tx.unique.createItem(collectionId, normalizeAccountId(owner), createData as any);
-
-  const events = await submitTransactionAsync(sender, tx);
-  return  getCreateItemResult(events);
-}
-
-export async function createItemExpectFailure(sender: IKeyringPair, collectionId: number, createMode: string, owner: CrossAccountId | string = sender.address) {
-  await usingApi(async (api) => {
-    const tx = api.tx.unique.createItem(collectionId, normalizeAccountId(owner), createMode);
-
-    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
-    const result = getCreateItemResult(events);
-
-    expect(result.success).to.be.false;
-  });
-}
-
-export async function setPublicAccessModeExpectSuccess(
-  sender: IKeyringPair, collectionId: number,
-  accessMode: 'Normal' | 'AllowList',
-) {
-  await usingApi(async (api) => {
-
-    // Run the transaction
-    const tx = api.tx.unique.setCollectionPermissions(collectionId, {access: accessMode});
-    const events = await submitTransactionAsync(sender, tx);
-    const result = getGenericResult(events);
-
-    // Get the collection
-    const collection = await queryCollectionExpectSuccess(api, collectionId);
-
-    // What to expect
-    // tslint:disable-next-line:no-unused-expression
-    expect(result.success).to.be.true;
-    expect(collection.permissions.access.toHuman()).to.be.equal(accessMode);
-  });
-}
-
-export async function setPublicAccessModeExpectFail(
-  sender: IKeyringPair, collectionId: number,
-  accessMode: 'Normal' | 'AllowList',
-) {
-  await usingApi(async (api) => {
-
-    // Run the transaction
-    const tx = api.tx.unique.setCollectionPermissions(collectionId, {access: accessMode});
-    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
-    const result = getGenericResult(events);
-
-    // What to expect
-    // tslint:disable-next-line:no-unused-expression
-    expect(result.success).to.be.false;
-  });
-}
-
-export async function enableAllowListExpectSuccess(sender: IKeyringPair, collectionId: number) {
-  await setPublicAccessModeExpectSuccess(sender, collectionId, 'AllowList');
-}
-
-export async function enableAllowListExpectFail(sender: IKeyringPair, collectionId: number) {
-  await setPublicAccessModeExpectFail(sender, collectionId, 'AllowList');
-}
-
-export async function disableAllowListExpectSuccess(sender: IKeyringPair, collectionId: number) {
-  await setPublicAccessModeExpectSuccess(sender, collectionId, 'Normal');
-}
-
-export async function setMintPermissionExpectSuccess(sender: IKeyringPair, collectionId: number, enabled: boolean) {
-  await usingApi(async (api) => {
-
-    // Run the transaction
-    const tx = api.tx.unique.setCollectionPermissions(collectionId, {mintMode: enabled});
-    const events = await submitTransactionAsync(sender, tx);
-    const result = getGenericResult(events);
-    expect(result.success).to.be.true;
-
-    // Get the collection
-    const collection = await queryCollectionExpectSuccess(api, collectionId);
-
-    expect(collection.permissions.mintMode.toHuman()).to.be.equal(enabled);
-  });
-}
-
-export async function enablePublicMintingExpectSuccess(sender: IKeyringPair, collectionId: number) {
-  await setMintPermissionExpectSuccess(sender, collectionId, true);
-}
-
-export async function setMintPermissionExpectFailure(sender: IKeyringPair, collectionId: number, enabled: boolean) {
-  await usingApi(async (api) => {
-    // Run the transaction
-    const tx = api.tx.unique.setCollectionPermissions(collectionId, {mintMode: enabled});
-    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
-    const result = getCreateCollectionResult(events);
-    // tslint:disable-next-line:no-unused-expression
-    expect(result.success).to.be.false;
-  });
-}
-
-export async function setChainLimitsExpectFailure(sender: IKeyringPair, limits: IChainLimits) {
-  await usingApi(async (api) => {
-    // Run the transaction
-    const tx = api.tx.unique.setChainLimits(limits);
-    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
-    const result = getCreateCollectionResult(events);
-    // tslint:disable-next-line:no-unused-expression
-    expect(result.success).to.be.false;
-  });
-}
-
-export async function isAllowlisted(api: ApiPromise, collectionId: number, address: string | CrossAccountId | IKeyringPair) {
-  return (await api.rpc.unique.allowed(collectionId, normalizeAccountId(address))).toJSON();
-}
-
-export async function addToAllowListExpectSuccess(sender: IKeyringPair, collectionId: number, address: string | AccountId | CrossAccountId) {
-  await usingApi(async (api) => {
-    expect(await isAllowlisted(api, collectionId, normalizeAccountId(address))).to.be.false;
-
-    // Run the transaction
-    const tx = api.tx.unique.addToAllowList(collectionId, normalizeAccountId(address));
-    const events = await submitTransactionAsync(sender, tx);
-    const result = getGenericResult(events);
-    expect(result.success).to.be.true;
-
-    expect(await isAllowlisted(api, collectionId, normalizeAccountId(address))).to.be.true;
-  });
-}
-
-export async function addToAllowListAgainExpectSuccess(sender: IKeyringPair, collectionId: number, address: string | AccountId) {
-  await usingApi(async (api) => {
-
-    expect(await isAllowlisted(api, collectionId, normalizeAccountId(address))).to.be.true;
-
-    // Run the transaction
-    const tx = api.tx.unique.addToAllowList(collectionId, normalizeAccountId(address));
-    const events = await submitTransactionAsync(sender, tx);
-    const result = getGenericResult(events);
-    expect(result.success).to.be.true;
-
-    expect(await isAllowlisted(api, collectionId, normalizeAccountId(address))).to.be.true;
-  });
-}
-
-export async function addToAllowListExpectFail(sender: IKeyringPair, collectionId: number, address: string | AccountId) {
-  await usingApi(async (api) => {
-
-    // Run the transaction
-    const tx = api.tx.unique.addToAllowList(collectionId, normalizeAccountId(address));
-    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
-    const result = getGenericResult(events);
-
-    // What to expect
-    // tslint:disable-next-line:no-unused-expression
-    expect(result.success).to.be.false;
-  });
-}
-
-export async function removeFromAllowListExpectSuccess(sender: IKeyringPair, collectionId: number, address: CrossAccountId) {
-  await usingApi(async (api) => {
-    // Run the transaction
-    const tx = api.tx.unique.removeFromAllowList(collectionId, normalizeAccountId(address));
-    const events = await submitTransactionAsync(sender, tx);
-    const result = getGenericResult(events);
-
-    // What to expect
-    // tslint:disable-next-line:no-unused-expression
-    expect(result.success).to.be.true;
-  });
-}
-
-export async function removeFromAllowListExpectFailure(sender: IKeyringPair, collectionId: number, address: CrossAccountId) {
-  await usingApi(async (api) => {
-    // Run the transaction
-    const tx = api.tx.unique.removeFromAllowList(collectionId, normalizeAccountId(address));
-    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
-    const result = getGenericResult(events);
-
-    // What to expect
-    // tslint:disable-next-line:no-unused-expression
-    expect(result.success).to.be.false;
-  });
-}
-
-export const getDetailedCollectionInfo = async (api: ApiPromise, collectionId: number)
-  : Promise<UpDataStructsRpcCollection | null> => {
-  return (await api.rpc.unique.collectionById(collectionId)).unwrapOr(null);
-};
-
-export const getCreatedCollectionCount = async (api: ApiPromise): Promise<number> => {
-  // set global object - collectionsCount
-  return (await api.rpc.unique.collectionStats()).created.toNumber();
-};
-
-export async function queryCollectionExpectSuccess(api: ApiPromise, collectionId: number): Promise<UpDataStructsRpcCollection> {
-  return (await api.rpc.unique.collectionById(collectionId)).unwrap();
-}
-
-export const describe_xcm = (
-  process.env.RUN_XCM_TESTS
-    ? describe
-    : describe.skip
-);
-
-export async function waitNewBlocks(blocksCount = 1): Promise<void> {
-  await usingApi(async (api) => {
-    const promise = new Promise<void>(async (resolve) => {
-      const unsubscribe = await api.rpc.chain.subscribeNewHeads(() => {
-        if (blocksCount > 0) {
-          blocksCount--;
-        } else {
-          unsubscribe();
-          resolve();
-        }
-      });
-    });
-    return promise;
-  });
-}
-
-export async function waitEvent(
-  api: ApiPromise,
-  maxBlocksToWait: number,
-  eventSection: string,
-  eventMethod: string,
-): Promise<EventRecord | null> {
-
-  const promise = new Promise<EventRecord | null>(async (resolve) => {
-    const unsubscribe = await api.rpc.chain.subscribeNewHeads(async header => {
-      const blockNumber = header.number.toHuman();
-      const blockHash = header.hash;
-      const eventIdStr = `${eventSection}.${eventMethod}`;
-      const waitLimitStr = `wait blocks remaining: ${maxBlocksToWait}`;
-
-      console.log(`[Block #${blockNumber}] Waiting for event \`${eventIdStr}\` (${waitLimitStr})`);
-
-      const apiAt = await api.at(blockHash);
-      const eventRecords = await apiAt.query.system.events();
-
-      const neededEvent = eventRecords.find(r => {
-        return r.event.section == eventSection && r.event.method == eventMethod;
-      });
-
-      if (neededEvent) {
-        unsubscribe();
-        resolve(neededEvent);
-      } else if (maxBlocksToWait > 0) {
-        maxBlocksToWait--;
-      } else {
-        console.log(`Event \`${eventIdStr}\` is NOT found`);
-
-        unsubscribe();
-        resolve(null);
-      }
-    });
-  });
-  return promise;
-}
-
-export async function repartitionRFT(
-  api: ApiPromise,
-  collectionId: number,
-  sender: IKeyringPair,
-  tokenId: number,
-  amount: bigint,
-): Promise<boolean> {
-  const tx = api.tx.unique.repartition(collectionId, tokenId, amount);
-  const events = await submitTransactionAsync(sender, tx);
-  const result = getGenericResult(events);
-
-  return result.success;
-}
-
-export async function itApi(name: string, cb: (apis: { api: ApiPromise, privateKeyWrapper: (account: string) => IKeyringPair }) => any, opts: { only?: boolean, skip?: boolean } = {}) {
-  let i: any = it;
-  if (opts.only) i = i.only;
-  else if (opts.skip) i = i.skip;
-  i(name, async () => {
-    await usingApi(async (api, privateKeyWrapper) => {
-      await cb({api, privateKeyWrapper});
-    });
-  });
-}
-
-itApi.only = (name: string, cb: (apis: { api: ApiPromise, privateKeyWrapper: (account: string) => IKeyringPair }) => any) => itApi(name, cb, {only: true});
-itApi.skip = (name: string, cb: (apis: { api: ApiPromise, privateKeyWrapper: (account: string) => IKeyringPair }) => any) => itApi(name, cb, {skip: true});
-
-let accountSeed = 10000;
-export function generateKeyringPair(keyring: Keyring) {
-  const privateKey = `0xDEADBEEF${(Date.now() + (accountSeed++)).toString(16).padStart(64 - 8, '0')}`;
-  return keyring.addFromUri(privateKey);
-}
-
-export async function expectSubstrateEventsAtBlock(api: ApiPromise, blockNumber: AnyNumber | BlockNumber, section: string, methods: string[], dryRun = false) {
-  const blockHash = await api.rpc.chain.getBlockHash(blockNumber);
-  const subEvents = (await api.query.system.events.at(blockHash))
-    .filter(x => x.event.section === section)
-    .map((x) => x.toHuman());
-  const events = methods.map((m) => {
-    return {
-      event: {
-        method: m,
-        section,
-      },
-    };
-  });
-  if (!dryRun) {
-    expect(subEvents).to.be.like(events);
-  }
-  return subEvents;
-}
modifiedtests/src/util/playgrounds/index.tsdiffbeforeafterboth
--- a/tests/src/util/playgrounds/index.ts
+++ b/tests/src/util/playgrounds/index.ts
@@ -38,6 +38,7 @@
   Fungible = 'fungible',
   NFT = 'nonfungible',
   Scheduler = 'scheduler',
+  AppPromotion = 'apppromotion',
 }
 
 export function requirePalletsOrSkip(test: Context, helper: DevUniqueHelper, requiredPallets: string[]) {
modifiedtests/src/util/playgrounds/unique.dev.tsdiffbeforeafterboth
--- a/tests/src/util/playgrounds/unique.dev.ts
+++ b/tests/src/util/playgrounds/unique.dev.ts
@@ -215,8 +215,8 @@
   };
 
   isDevNode = async () => {
-    const block1 = await this.helper.api?.rpc.chain.getBlock(await this.helper.api?.rpc.chain.getBlockHash(1));
-    const block2 = await this.helper.api?.rpc.chain.getBlock(await this.helper.api?.rpc.chain.getBlockHash(2));
+    const block1 = await this.helper.callRpc('api.rpc.chain.getBlock', [await this.helper.callRpc('api.rpc.chain.getBlockHash', [1])]);
+    const block2 = await this.helper.callRpc('api.rpc.chain.getBlock', [await this.helper.callRpc('api.rpc.chain.getBlockHash', [2])]);
     const findCreationDate = async (block: any) => {
       const humanBlock = block.toHuman();
       let date;
@@ -259,7 +259,7 @@
   async newBlocks(blocksCount = 1): Promise<void> {
     // eslint-disable-next-line no-async-promise-executor
     const promise = new Promise<void>(async (resolve) => {
-      const unsubscribe = await this.helper.api!.rpc.chain.subscribeNewHeads(() => {
+      const unsubscribe = await this.helper.getApi().rpc.chain.subscribeNewHeads(() => {
         if (blocksCount > 0) {
           blocksCount--;
         } else {
@@ -274,7 +274,7 @@
   async forParachainBlockNumber(blockNumber: bigint) {
     // eslint-disable-next-line no-async-promise-executor
     return new Promise<void>(async (resolve) => {
-      const unsubscribe = await this.helper.api!.rpc.chain.subscribeNewHeads(async (data: any) => {
+      const unsubscribe = await this.helper.getApi().rpc.chain.subscribeNewHeads(async (data: any) => {
         if (data.number.toNumber() >= blockNumber) {
           unsubscribe();
           resolve();
@@ -286,7 +286,7 @@
   async forRelayBlockNumber(blockNumber: bigint) {
     // eslint-disable-next-line no-async-promise-executor
     return new Promise<void>(async (resolve) => {
-      const unsubscribe = await this.helper.api!.query.parachainSystem.validationData(async (data: any) => {
+      const unsubscribe = await this.helper.getApi().query.parachainSystem.validationData(async (data: any) => {
         if (data.value.relayParentNumber.toNumber() >= blockNumber) {
           // @ts-ignore
           unsubscribe();
modifiedtests/src/util/playgrounds/unique.tsdiffbeforeafterboth
before · tests/src/util/playgrounds/unique.ts
1// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.2// SPDX-License-Identifier: Apache-2.034/* eslint-disable @typescript-eslint/no-var-requires */5/* eslint-disable function-call-argument-newline */6/* eslint-disable no-prototype-builtins */78import {ApiPromise, WsProvider, Keyring} from '@polkadot/api';9import {ApiInterfaceEvents, SignerOptions} from '@polkadot/api/types';10import {encodeAddress, decodeAddress, keccakAsHex, evmToAddress, addressToEvm} from '@polkadot/util-crypto';11import {IKeyringPair} from '@polkadot/types/types';12import {IApiListeners, IBlock, IEvent, IChainProperties, ICollectionCreationOptions, ICollectionLimits, ICollectionPermissions, ICrossAccountId, ICrossAccountIdLower, ILogger, INestingPermissions, IProperty, IStakingInfo, ISubstrateBalance, IToken, ITokenPropertyPermission, ITransactionResult, IUniqueHelperLog, TApiAllowedListeners, TEthereumAccount, TSigner, TSubstrateAccount, TUniqueNetworks} from './types';1314export class CrossAccountId implements ICrossAccountId {15  Substrate?: TSubstrateAccount;16  Ethereum?: TEthereumAccount;1718  constructor(account: ICrossAccountId) {19    if (account.Substrate) this.Substrate = account.Substrate;20    if (account.Ethereum) this.Ethereum = account.Ethereum;21  }2223  static fromKeyring(account: IKeyringPair, domain: 'Substrate' | 'Ethereum' = 'Substrate') {24    switch (domain) {25      case 'Substrate': return new CrossAccountId({Substrate: account.address});26      case 'Ethereum': return new CrossAccountId({Substrate: account.address}).toEthereum();27    }28  }2930  static fromLowerCaseKeys(address: ICrossAccountIdLower): CrossAccountId {31    return new CrossAccountId({Substrate: address.substrate, Ethereum: address.ethereum});32  }3334  static normalizeSubstrateAddress(address: TSubstrateAccount, ss58Format = 42): TSubstrateAccount {35    return encodeAddress(decodeAddress(address), ss58Format);36  }3738  static withNormalizedSubstrate(address: TSubstrateAccount, ss58Format = 42): CrossAccountId {39    return new CrossAccountId({Substrate: CrossAccountId.normalizeSubstrateAddress(address, ss58Format)});40  }41  42  withNormalizedSubstrate(ss58Format = 42): CrossAccountId {43    if (this.Substrate) return CrossAccountId.withNormalizedSubstrate(this.Substrate, ss58Format);44    return this;45  }4647  static translateSubToEth(address: TSubstrateAccount): TEthereumAccount {48    return nesting.toChecksumAddress('0x' + Array.from(addressToEvm(address), i => i.toString(16).padStart(2, '0')).join(''));49  }5051  toEthereum(): CrossAccountId {52    if (this.Substrate) return new CrossAccountId({Ethereum: CrossAccountId.translateSubToEth(this.Substrate)});53    return this;54  }5556  static translateEthToSub(address: TEthereumAccount, ss58Format?: number): TSubstrateAccount {57    return evmToAddress(address, ss58Format);58  }5960  toSubstrate(ss58Format?: number): CrossAccountId {61    if (this.Ethereum) return new CrossAccountId({Substrate: CrossAccountId.translateEthToSub(this.Ethereum, ss58Format)});62    return this;63  }64  65  toLowerCase(): CrossAccountId {66    if (this.Substrate) this.Substrate = this.Substrate.toLowerCase();67    if (this.Ethereum) this.Ethereum = this.Ethereum.toLowerCase();68    return this;69  }70}7172const nesting = {73  toChecksumAddress(address: string): string {74    if (typeof address === 'undefined') return '';7576    if(!/^(0x)?[0-9a-f]{40}$/i.test(address)) throw new Error(`Given address "${address}" is not a valid Ethereum address.`);7778    address = address.toLowerCase().replace(/^0x/i,'');79    const addressHash = keccakAsHex(address).replace(/^0x/i,'');80    const checksumAddress = ['0x'];8182    for (let i = 0; i < address.length; i++) {83      // If ith character is 8 to f then make it uppercase84      if (parseInt(addressHash[i], 16) > 7) {85        checksumAddress.push(address[i].toUpperCase());86      } else {87        checksumAddress.push(address[i]);88      }89    }90    return checksumAddress.join('');91  },92  tokenIdToAddress(collectionId: number, tokenId: number) {93    return this.toChecksumAddress(`0xf8238ccfff8ed887463fd5e0${collectionId.toString(16).padStart(8, '0')}${tokenId.toString(16).padStart(8, '0')}`);94  },95};9697class UniqueUtil {98  static transactionStatus = {99    NOT_READY: 'NotReady',100    FAIL: 'Fail',101    SUCCESS: 'Success',102  };103104  static chainLogType = {105    EXTRINSIC: 'extrinsic',106    RPC: 'rpc',107  };108109  static getTokenAccount(token: IToken): CrossAccountId {110    return new CrossAccountId({Ethereum: this.getTokenAddress(token)});111  }112113  static getTokenAddress(token: IToken): string {114    return nesting.tokenIdToAddress(token.collectionId, token.tokenId);115  }116117  static getDefaultLogger(): ILogger {118    return {119      log(msg: any, level = 'INFO') {120        console[level.toLocaleLowerCase() === 'error' ? 'error' : 'log'](...(Array.isArray(msg) ? msg : [msg]));121      },122      level: {123        ERROR: 'ERROR',124        WARNING: 'WARNING',125        INFO: 'INFO',126      },127    };128  }129130  static vec2str(arr: string[] | number[]) {131    return arr.map(x => String.fromCharCode(parseInt(x.toString()))).join('');132  }133134  static str2vec(string: string) {135    if (typeof string !== 'string') return string;136    return Array.from(string).map(x => x.charCodeAt(0));137  }138139  static fromSeed(seed: string, ss58Format = 42) {140    const keyring = new Keyring({type: 'sr25519', ss58Format});141    return keyring.addFromUri(seed);142  }143144  static extractCollectionIdFromCreationResult(creationResult: ITransactionResult): number {145    if (creationResult.status !== this.transactionStatus.SUCCESS) {146      throw Error('Unable to create collection!');147    }148149    let collectionId = null;150    creationResult.result.events.forEach(({event: {data, method, section}}) => {151      if ((section === 'common') && (method === 'CollectionCreated')) {152        collectionId = parseInt(data[0].toString(), 10);153      }154    });155156    if (collectionId === null) {157      throw Error('No CollectionCreated event was found!');158    }159160    return collectionId;161  }162163  static extractTokensFromCreationResult(creationResult: ITransactionResult): {164    success: boolean, 165    tokens: {collectionId: number, tokenId: number, owner: CrossAccountId, amount: bigint}[],166  } {167    if (creationResult.status !== this.transactionStatus.SUCCESS) {168      throw Error('Unable to create tokens!');169    }170    let success = false;171    const tokens = [] as {collectionId: number, tokenId: number, owner: CrossAccountId, amount: bigint}[];172    creationResult.result.events.forEach(({event: {data, method, section}}) => {173      if (method === 'ExtrinsicSuccess') {174        success = true;175      } else if ((section === 'common') && (method === 'ItemCreated')) {176        tokens.push({177          collectionId: parseInt(data[0].toString(), 10),178          tokenId: parseInt(data[1].toString(), 10),179          owner: data[2].toHuman(),180          amount: data[3].toBigInt(),181        });182      }183    });184    return {success, tokens};185  }186187  static extractTokensFromBurnResult(burnResult: ITransactionResult): {188    success: boolean, 189    tokens: {collectionId: number, tokenId: number, owner: CrossAccountId, amount: bigint}[],190  } {191    if (burnResult.status !== this.transactionStatus.SUCCESS) {192      throw Error('Unable to burn tokens!');193    }194    let success = false;195    const tokens = [] as {collectionId: number, tokenId: number, owner: CrossAccountId, amount: bigint}[];196    burnResult.result.events.forEach(({event: {data, method, section}}) => {197      if (method === 'ExtrinsicSuccess') {198        success = true;199      } else if ((section === 'common') && (method === 'ItemDestroyed')) {200        tokens.push({201          collectionId: parseInt(data[0].toString(), 10),202          tokenId: parseInt(data[1].toString(), 10),203          owner: data[2].toHuman(),204          amount: data[3].toBigInt(),205        });206      }207    });208    return {success, tokens};209  }210211  static findCollectionInEvents(events: {event: IEvent}[], collectionId: number, expectedSection: string, expectedMethod: string): boolean {212    let eventId = null;213    events.forEach(({event: {data, method, section}}) => {214      if ((section === expectedSection) && (method === expectedMethod)) {215        eventId = parseInt(data[0].toString(), 10);216      }217    });218219    if (eventId === null) {220      throw Error(`No ${expectedMethod} event was found!`);221    }222    return eventId === collectionId;223  }224225  static isTokenTransferSuccess(events: {event: IEvent}[], collectionId: number, tokenId: number, fromAddressObj: ICrossAccountId, toAddressObj: ICrossAccountId, amount=1n) {226    const normalizeAddress = (address: string | ICrossAccountId) => {227      if(typeof address === 'string') return address;228      const obj = {} as any;229      Object.keys(address).forEach(k => {230        obj[k.toLocaleLowerCase()] = address[k as 'Substrate' | 'Ethereum'];231      });232      if(obj.substrate) return CrossAccountId.withNormalizedSubstrate(obj.substrate);233      if(obj.ethereum) return CrossAccountId.fromLowerCaseKeys(obj).toLowerCase();234      return address;235    };236    let transfer = {collectionId: null, tokenId: null, from: null, to: null, amount: 1} as any;237    events.forEach(({event: {data, method, section}}) => {238      if ((section === 'common') && (method === 'Transfer')) {239        const hData = (data as any).toJSON();240        transfer = {241          collectionId: hData[0],242          tokenId: hData[1],243          from: normalizeAddress(hData[2]),244          to: normalizeAddress(hData[3]),245          amount: BigInt(hData[4]),246        };247      }248    });249    let isSuccess = parseInt(collectionId.toString()) === transfer.collectionId && parseInt(tokenId.toString()) === transfer.tokenId;250    isSuccess = isSuccess && JSON.stringify(normalizeAddress(fromAddressObj)) === JSON.stringify(transfer.from);251    isSuccess = isSuccess && JSON.stringify(normalizeAddress(toAddressObj)) === JSON.stringify(transfer.to);252    isSuccess = isSuccess && amount === transfer.amount;253    return isSuccess;254  }255}256257class UniqueEventHelper {258  private static extractIndex(index: any): [number, number] | string {259    if(index.toRawType() === '[u8;2]') return [index[0], index[1]];260    return index.toJSON();261  }262263  private static extractSub(data: any, subTypes: any): {[key: string]: any} {264    let obj: any = {};265    let index = 0;266267    if (data.entries) {268      for(const [key, value] of data.entries()) {269        obj[key] = this.extractData(value, subTypes[index]);270        index++;271      }272    } else obj = data.toJSON();273274    return obj;275  }276  277  private static extractData(data: any, type: any): any {278    if(!type) return data.toHuman();279    if (['u16', 'u32'].indexOf(type.type) > -1) return data.toNumber();280    if (['u64', 'u128', 'u256'].indexOf(type.type) > -1) return data.toBigInt();281    if(type.hasOwnProperty('sub')) return this.extractSub(data, type.sub);282    return data.toHuman();283  }284285  public static extractEvents(records: ITransactionResult): IEvent[] {286    const parsedEvents: IEvent[] = [];287288    records.result.events.forEach((record) => {289      const {event, phase} = record;290      const types = (event as any).typeDef;291292      const eventData: IEvent = {293        section: event.section.toString(),294        method: event.method.toString(),295        index: this.extractIndex(event.index),296        data: [],297        phase: phase.toJSON(),298      };299300      event.data.forEach((val: any, index: number) => {301        eventData.data.push(this.extractData(val, types[index]));302      });303304      parsedEvents.push(eventData);305    });306307    return parsedEvents;308  }309}310311class ChainHelperBase {312  transactionStatus = UniqueUtil.transactionStatus;313  chainLogType = UniqueUtil.chainLogType;314  util: typeof UniqueUtil;315  eventHelper: typeof UniqueEventHelper;316  logger: ILogger;317  api: ApiPromise | null;318  forcedNetwork: TUniqueNetworks | null;319  network: TUniqueNetworks | null;320  chainLog: IUniqueHelperLog[];321322  constructor(logger?: ILogger) {323    this.util = UniqueUtil;324    this.eventHelper = UniqueEventHelper;325    if (typeof logger == 'undefined') logger = this.util.getDefaultLogger();326    this.logger = logger;327    this.api = null;328    this.forcedNetwork = null;329    this.network = null;330    this.chainLog = [];331  }332333  clearChainLog(): void {334    this.chainLog = [];335  }336337  forceNetwork(value: TUniqueNetworks): void {338    this.forcedNetwork = value;339  }340341  async connect(wsEndpoint: string, listeners?: IApiListeners) {342    if (this.api !== null) throw Error('Already connected');343    const {api, network} = await ChainHelperBase.createConnection(wsEndpoint, listeners, this.forcedNetwork);344    this.api = api;345    this.network = network;346  }347348  async disconnect() {349    if (this.api === null) return;350    await this.api.disconnect();351    this.api = null;352    this.network = null;353  }354355  static async detectNetwork(api: ApiPromise): Promise<TUniqueNetworks> {356    const spec = (await api.query.system.lastRuntimeUpgrade()).toJSON() as any;357    if(['quartz', 'unique'].indexOf(spec.specName) > -1) return spec.specName;358    return 'opal';359  }360361  static async detectNetworkByWsEndpoint(wsEndpoint: string): Promise<TUniqueNetworks> {362    const api = new ApiPromise({provider: new WsProvider(wsEndpoint)});363    await api.isReady;364365    const network = await this.detectNetwork(api);366367    await api.disconnect();368369    return network;370  }371372  static async createConnection(wsEndpoint: string, listeners?: IApiListeners, network?: TUniqueNetworks | null): Promise<{373    api: ApiPromise;374    network: TUniqueNetworks;375  }> {376    if(typeof network === 'undefined' || network === null) network = 'opal';377    const supportedRPC = {378      opal: {379        unique: require('@unique-nft/opal-testnet-types/definitions').unique.rpc,380      },381      quartz: {382        unique: require('@unique-nft/quartz-mainnet-types/definitions').unique.rpc,383      },384      unique: {385        unique: require('@unique-nft/unique-mainnet-types/definitions').unique.rpc,386      },387    };388    if(!supportedRPC.hasOwnProperty(network)) network = await this.detectNetworkByWsEndpoint(wsEndpoint);389    const rpc = supportedRPC[network];390391    // TODO: investigate how to replace rpc in runtime392    // api._rpcCore.addUserInterfaces(rpc);393394    const api = new ApiPromise({provider: new WsProvider(wsEndpoint), rpc});395396    await api.isReadyOrError;397398    if (typeof listeners === 'undefined') listeners = {};399    for (const event of ['connected', 'disconnected', 'error', 'ready', 'decorated']) {400      if (!listeners.hasOwnProperty(event) || typeof listeners[event as TApiAllowedListeners] === 'undefined') continue;401      api.on(event as ApiInterfaceEvents, listeners[event as TApiAllowedListeners] as (...args: any[]) => any);402    }403404    return {api, network};405  }406407  getTransactionStatus(data: {events: {event: IEvent}[], status: any}) {408    const {events, status} = data;409    if (status.isReady) {410      return this.transactionStatus.NOT_READY;411    }412    if (status.isBroadcast) {413      return this.transactionStatus.NOT_READY;414    }415    if (status.isInBlock || status.isFinalized) {416      const errors = events.filter(e => e.event.method === 'ExtrinsicFailed');417      if (errors.length > 0) {418        return this.transactionStatus.FAIL;419      }420      if (events.filter(e => e.event.method === 'ExtrinsicSuccess').length > 0) {421        return this.transactionStatus.SUCCESS;422      }423    }424425    return this.transactionStatus.FAIL;426  }427428  signTransaction(sender: TSigner, transaction: any, options: Partial<SignerOptions> | null = null, label = 'transaction') {429    const sign = (callback: any) => {430      if(options !== null) return transaction.signAndSend(sender, options, callback);431      return transaction.signAndSend(sender, callback);432    };433    // eslint-disable-next-line no-async-promise-executor434    return new Promise(async (resolve, reject) => {435      try {436        const unsub = await sign((result: any) => {437          const status = this.getTransactionStatus(result);438439          if (status === this.transactionStatus.SUCCESS) {440            this.logger.log(`${label} successful`);441            unsub();442            resolve({result, status});443          } else if (status === this.transactionStatus.FAIL) {444            let moduleError = null;445446            if (result.hasOwnProperty('dispatchError')) {447              const dispatchError = result['dispatchError'];448449              if (dispatchError) {450                if (dispatchError.isModule) {451                  const modErr = dispatchError.asModule;452                  const errorMeta = dispatchError.registry.findMetaError(modErr);453454                  moduleError = `${errorMeta.section}.${errorMeta.name}`;455                } else {456                  moduleError = dispatchError.toHuman();457                }458              } else {459                this.logger.log(result, this.logger.level.ERROR);460              }461            }462463            this.logger.log(`Something went wrong with ${label}. Status: ${status}`, this.logger.level.ERROR);464            unsub();465            reject({status, moduleError, result});466          }467        });468      } catch (e) {469        this.logger.log(e, this.logger.level.ERROR);470        reject(e);471      }472    });473  }474475  constructApiCall(apiCall: string, params: any[]) {476    if(!apiCall.startsWith('api.')) throw Error(`Invalid api call: ${apiCall}`);477    let call = this.api as any;478    for(const part of apiCall.slice(4).split('.')) {479      call = call[part];480    }481    return call(...params);482  }483484  async executeExtrinsic(sender: TSigner, extrinsic: string, params: any[], expectSuccess=true, options: Partial<SignerOptions>|null = null/*, failureMessage='expected success'*/) {485    if(this.api === null) throw Error('API not initialized');486    if(!extrinsic.startsWith('api.tx.')) throw Error(`${extrinsic} is not transaction`);487488    const startTime = (new Date()).getTime();489    let result: ITransactionResult;490    let events: IEvent[] = [];491    try {492      result = await this.signTransaction(sender, this.constructApiCall(extrinsic, params), options, extrinsic) as ITransactionResult;493      events = this.eventHelper.extractEvents(result);494    }495    catch(e) {496      if(!(e as object).hasOwnProperty('status')) throw e;497      result = e as ITransactionResult;498    }499500    const endTime = (new Date()).getTime();501502    const log = {503      executedAt: endTime,504      executionTime: endTime - startTime,505      type: this.chainLogType.EXTRINSIC,506      status: result.status,507      call: extrinsic,508      signer: this.getSignerAddress(sender),509      params,510    } as IUniqueHelperLog;511512    if(result.status !== this.transactionStatus.SUCCESS && result.moduleError) log.moduleError = result.moduleError;513    if(events.length > 0) log.events = events;514515    this.chainLog.push(log);516517    if(expectSuccess && result.status !== this.transactionStatus.SUCCESS) throw Error(`${result.moduleError}`);518    return result;519  }520521  async callRpc(rpc: string, params?: any[]) {522    if(typeof params === 'undefined') params = [];523    if(this.api === null) throw Error('API not initialized');524    if(!rpc.startsWith('api.rpc.') && !rpc.startsWith('api.query.')) throw Error(`${rpc} is not RPC call`);525526    const startTime = (new Date()).getTime();527    let result;528    let error = null;529    const log = {530      type: this.chainLogType.RPC,531      call: rpc,532      params,533    } as IUniqueHelperLog;534535    try {536      result = await this.constructApiCall(rpc, params);537    }538    catch(e) {539      error = e;540    }541542    const endTime = (new Date()).getTime();543544    log.executedAt = endTime;545    log.status = (error === null ? this.transactionStatus.SUCCESS : this.transactionStatus.FAIL) as 'Fail' | 'Success';546    log.executionTime = endTime - startTime;547548    this.chainLog.push(log);549550    if(error !== null) throw error;551552    return result;553  }554555  getSignerAddress(signer: IKeyringPair | string): string {556    if(typeof signer === 'string') return signer;557    return signer.address;558  }559560  fetchAllPalletNames(): string[] {561    if(this.api === null) throw Error('API not initialized');562    return this.api.runtimeMetadata.asLatest.pallets.map(m => m.name.toString().toLowerCase());563  }564565  fetchMissingPalletNames(requiredPallets: string[]): string[] {566    const palletNames = this.fetchAllPalletNames();567    return requiredPallets.filter(p => !palletNames.includes(p));568  }569}570571572class HelperGroup {573  helper: UniqueHelper;574575  constructor(uniqueHelper: UniqueHelper) {576    this.helper = uniqueHelper;577  }578}579580581class CollectionGroup extends HelperGroup {582  /**583 * Get number of blocks when sponsored transaction is available.584 *585 * @param collectionId ID of collection586 * @param tokenId ID of token587 * @param addressObj address for which the sponsorship is checked588 * @example await getTokenNextSponsored(1, 2, {Substrate: '5DfhbVfww7ThF8q6f3...'});589 * @returns number of blocks or null if sponsorship hasn't been set590 */591  async getTokenNextSponsored(collectionId: number, tokenId: number, addressObj: ICrossAccountId): Promise<number | null> {592    return (await this.helper.callRpc('api.rpc.unique.nextSponsored', [collectionId, addressObj, tokenId])).toJSON();593  }594595  /**596   * Get the number of created collections.597   *598   * @returns number of created collections599   */600  async getTotalCount(): Promise<number> {601    return (await this.helper.callRpc('api.rpc.unique.collectionStats')).created.toNumber();602  }603604  /**605   * Get information about the collection with additional data,606   * including the number of tokens it contains, its administrators,607   * the normalized address of the collection's owner, and decoded name and description.608   *609   * @param collectionId ID of collection610   * @example await getData(2)611   * @returns collection information object612   */613  async getData(collectionId: number): Promise<{614    id: number;615    name: string;616    description: string;617    tokensCount: number;618    admins: CrossAccountId[];619    normalizedOwner: TSubstrateAccount;620    raw: any621  } | null> {622    const collection = await this.helper.callRpc('api.rpc.unique.collectionById', [collectionId]);623    const humanCollection = collection.toHuman(), collectionData = {624      id: collectionId, name: null, description: null, tokensCount: 0, admins: [],625      raw: humanCollection,626    } as any, jsonCollection = collection.toJSON();627    if (humanCollection === null) return null;628    collectionData.raw.limits = jsonCollection.limits;629    collectionData.raw.permissions = jsonCollection.permissions;630    collectionData.normalizedOwner = this.helper.address.normalizeSubstrate(collectionData.raw.owner);631    for (const key of ['name', 'description']) {632      collectionData[key] = this.helper.util.vec2str(humanCollection[key]);633    }634635    collectionData.tokensCount = (['RFT', 'NFT'].includes(humanCollection.mode))636      ? await this.helper[humanCollection.mode.toLocaleLowerCase() as 'nft' | 'rft'].getLastTokenId(collectionId)637      : 0;638    collectionData.admins = await this.getAdmins(collectionId);639640    return collectionData;641  }642643  /**644   * Get the addresses of the collection's administrators, optionally normalized.645   *646   * @param collectionId ID of collection647   * @param normalize whether to normalize the addresses to the default ss58 format648   * @example await getAdmins(1)649   * @returns array of administrators650   */651  async getAdmins(collectionId: number, normalize = false): Promise<CrossAccountId[]> {652    const admins = (await this.helper.callRpc('api.rpc.unique.adminlist', [collectionId])).toHuman();653654    return normalize655      ? admins.map((address: CrossAccountId) => address.withNormalizedSubstrate())656      : admins;657  }658659  /**660   * Get the addresses added to the collection allow-list, optionally normalized.661   * @param collectionId ID of collection662   * @param normalize whether to normalize the addresses to the default ss58 format663   * @example await getAllowList(1)664   * @returns array of allow-listed addresses665   */666  async getAllowList(collectionId: number, normalize = false): Promise<CrossAccountId[]> {667    const allowListed = (await this.helper.callRpc('api.rpc.unique.allowlist', [collectionId])).toHuman();668    return normalize669      ? allowListed.map((address: CrossAccountId) => address.withNormalizedSubstrate())670      : allowListed;671  }672673  /**674   * Get the effective limits of the collection instead of null for default values675   *676   * @param collectionId ID of collection677   * @example await getEffectiveLimits(2)678   * @returns object of collection limits679   */680  async getEffectiveLimits(collectionId: number): Promise<ICollectionLimits> {681    return (await this.helper.callRpc('api.rpc.unique.effectiveCollectionLimits', [collectionId])).toJSON();682  }683684  /**685   * Burns the collection if the signer has sufficient permissions and collection is empty.686   *687   * @param signer keyring of signer688   * @param collectionId ID of collection689   * @example await helper.collection.burn(aliceKeyring, 3);690   * @returns ```true``` if extrinsic success, otherwise ```false```691   */692  async burn(signer: TSigner, collectionId: number): Promise<boolean> {693    const result = await this.helper.executeExtrinsic(694      signer,695      'api.tx.unique.destroyCollection', [collectionId],696      true,697    );698699    return this.helper.util.findCollectionInEvents(result.result.events, collectionId, 'common', 'CollectionDestroyed');700  }701702  /**703   * Sets the sponsor for the collection (Requires the Substrate address). Needs confirmation by the sponsor.704   *705   * @param signer keyring of signer706   * @param collectionId ID of collection707   * @param sponsorAddress Sponsor substrate address708   * @example setSponsor(aliceKeyring, 10, "5DyN4Y92vZCjv38fg...")709   * @returns ```true``` if extrinsic success, otherwise ```false```710   */711  async setSponsor(signer: TSigner, collectionId: number, sponsorAddress: TSubstrateAccount): Promise<boolean> {712    const result = await this.helper.executeExtrinsic(713      signer,714      'api.tx.unique.setCollectionSponsor', [collectionId, sponsorAddress],715      true,716    );717718    return this.helper.util.findCollectionInEvents(result.result.events, collectionId, 'unique', 'CollectionSponsorSet');719  }720721  /**722   * Confirms consent to sponsor the collection on behalf of the signer.723   *724   * @param signer keyring of signer725   * @param collectionId ID of collection726   * @example confirmSponsorship(aliceKeyring, 10)727   * @returns ```true``` if extrinsic success, otherwise ```false```728   */729  async confirmSponsorship(signer: TSigner, collectionId: number): Promise<boolean> {730    const result = await this.helper.executeExtrinsic(731      signer,732      'api.tx.unique.confirmSponsorship', [collectionId],733      true,734    );735736    return this.helper.util.findCollectionInEvents(result.result.events, collectionId, 'unique', 'SponsorshipConfirmed');737  }738739  /**740   * Removes the sponsor of a collection, regardless if it consented or not.741   *742   * @param signer keyring of signer743   * @param collectionId ID of collection744   * @example removeSponsor(aliceKeyring, 10)745   * @returns ```true``` if extrinsic success, otherwise ```false```746   */747  async removeSponsor(signer: TSigner, collectionId: number): Promise<boolean> {748    const result = await this.helper.executeExtrinsic(749      signer,750      'api.tx.unique.removeCollectionSponsor', [collectionId],751      true,752    );753754    return this.helper.util.findCollectionInEvents(result.result.events, collectionId, 'unique', 'CollectionSponsorRemoved');755  }756757  /**758   * Sets the limits of the collection. At least one limit must be specified for a correct call.759   *760   * @param signer keyring of signer761   * @param collectionId ID of collection762   * @param limits collection limits object763   * @example764   * await setLimits(765   *   aliceKeyring,766   *   10,767   *   {768   *     sponsorTransferTimeout: 0,769   *     ownerCanDestroy: false770   *   }771   * )772   * @returns ```true``` if extrinsic success, otherwise ```false```773   */774  async setLimits(signer: TSigner, collectionId: number, limits: ICollectionLimits): Promise<boolean> {775    const result = await this.helper.executeExtrinsic(776      signer,777      'api.tx.unique.setCollectionLimits', [collectionId, limits],778      true,779    );780781    return this.helper.util.findCollectionInEvents(result.result.events, collectionId, 'unique', 'CollectionLimitSet');782  }783784  /**785   * Changes the owner of the collection to the new Substrate address.786   *787   * @param signer keyring of signer788   * @param collectionId ID of collection789   * @param ownerAddress substrate address of new owner790   * @example changeOwner(aliceKeyring, 10, "5DyN4Y92vZCjv38fg...")791   * @returns ```true``` if extrinsic success, otherwise ```false```792   */793  async changeOwner(signer: TSigner, collectionId: number, ownerAddress: TSubstrateAccount): Promise<boolean> {794    const result = await this.helper.executeExtrinsic(795      signer,796      'api.tx.unique.changeCollectionOwner', [collectionId, ownerAddress],797      true,798    );799800    return this.helper.util.findCollectionInEvents(result.result.events, collectionId, 'unique', 'CollectionOwnedChanged');801  }802803  /**804   * Adds a collection administrator.805   *806   * @param signer keyring of signer807   * @param collectionId ID of collection808   * @param adminAddressObj Administrator address (substrate or ethereum)809   * @example addAdmin(aliceKeyring, 10, {Substrate: "5DyN4Y92vZCjv38fg..."})810   * @returns ```true``` if extrinsic success, otherwise ```false```811   */812  async addAdmin(signer: TSigner, collectionId: number, adminAddressObj: ICrossAccountId): Promise<boolean> {813    const result = await this.helper.executeExtrinsic(814      signer,815      'api.tx.unique.addCollectionAdmin', [collectionId, adminAddressObj],816      true,817    );818819    return this.helper.util.findCollectionInEvents(result.result.events, collectionId, 'unique', 'CollectionAdminAdded');820  }821822  /**823   * Removes a collection administrator.824   *825   * @param signer keyring of signer826   * @param collectionId ID of collection827   * @param adminAddressObj Administrator address (substrate or ethereum)828   * @example removeAdmin(aliceKeyring, 10, {Substrate: "5DyN4Y92vZCjv38fg..."})829   * @returns ```true``` if extrinsic success, otherwise ```false```830   */831  async removeAdmin(signer: TSigner, collectionId: number, adminAddressObj: ICrossAccountId): Promise<boolean> {832    const result = await this.helper.executeExtrinsic(833      signer,834      'api.tx.unique.removeCollectionAdmin', [collectionId, adminAddressObj],835      true,836    );837838    return this.helper.util.findCollectionInEvents(result.result.events, collectionId, 'unique', 'CollectionAdminRemoved');839  }840841  /**842   * Check if user is in allow list.843   * 844   * @param collectionId ID of collection845   * @param user Account to check846   * @example await getAdmins(1)847   * @returns is user in allow list848   */849  async allowed(collectionId: number, user: ICrossAccountId): Promise<boolean> {850    return (await this.helper.callRpc('api.rpc.unique.allowed', [collectionId, user])).toJSON();851  }852853  /**854   * Adds an address to allow list855   * @param signer keyring of signer856   * @param collectionId ID of collection857   * @param addressObj address to add to the allow list858   * @returns ```true``` if extrinsic success, otherwise ```false```859   */860  async addToAllowList(signer: TSigner, collectionId: number, addressObj: ICrossAccountId): Promise<boolean> {861    const result = await this.helper.executeExtrinsic(862      signer,863      'api.tx.unique.addToAllowList', [collectionId, addressObj],864      true,865    );866867    return this.helper.util.findCollectionInEvents(result.result.events, collectionId, 'unique', 'AllowListAddressAdded');868  }869870  /**871   * Removes an address from allow list872   *873   * @param signer keyring of signer874   * @param collectionId ID of collection875   * @param addressObj address to remove from the allow list876   * @returns ```true``` if extrinsic success, otherwise ```false```877   */878  async removeFromAllowList(signer: TSigner, collectionId: number, addressObj: ICrossAccountId): Promise<boolean> {879    const result = await this.helper.executeExtrinsic(880      signer,881      'api.tx.unique.removeFromAllowList', [collectionId, addressObj],882      true,883    );884885    return this.helper.util.findCollectionInEvents(result.result.events, collectionId, 'unique', 'AllowListAddressRemoved');886  }887888  /**889   * Sets onchain permissions for selected collection.890   *891   * @param signer keyring of signer892   * @param collectionId ID of collection893   * @param permissions collection permissions object894   * @example setPermissions(aliceKeyring, 10, {access:'AllowList', mintMode: true, nesting: {collectionAdmin: true, tokenOwner: true}});895   * @returns ```true``` if extrinsic success, otherwise ```false```896   */897  async setPermissions(signer: TSigner, collectionId: number, permissions: ICollectionPermissions): Promise<boolean> {898    const result = await this.helper.executeExtrinsic(899      signer,900      'api.tx.unique.setCollectionPermissions', [collectionId, permissions],901      true,902    );903904    return this.helper.util.findCollectionInEvents(result.result.events, collectionId, 'unique', 'CollectionPermissionSet');905  }906907  /**908   * Enables nesting for selected collection. If `restricted` set, you can nest only tokens from specified collections.909   *910   * @param signer keyring of signer911   * @param collectionId ID of collection912   * @param permissions nesting permissions object913   * @example enableNesting(aliceKeyring, 10, {collectionAdmin: true, tokenOwner: true});914   * @returns ```true``` if extrinsic success, otherwise ```false```915   */916  async enableNesting(signer: TSigner, collectionId: number, permissions: INestingPermissions): Promise<boolean> {917    return await this.setPermissions(signer, collectionId, {nesting: permissions});918  }919920  /**921   * Disables nesting for selected collection.922   *923   * @param signer keyring of signer924   * @param collectionId ID of collection925   * @example disableNesting(aliceKeyring, 10);926   * @returns ```true``` if extrinsic success, otherwise ```false```927   */928  async disableNesting(signer: TSigner, collectionId: number): Promise<boolean> {929    return await this.setPermissions(signer, collectionId, {nesting: {tokenOwner: false, collectionAdmin: false}});930  }931932  /**933   * Sets onchain properties to the collection.934   *935   * @param signer keyring of signer936   * @param collectionId ID of collection937   * @param properties array of property objects938   * @example setProperties(aliceKeyring, 10, [{key: "gender", value: "male"}]);939   * @returns ```true``` if extrinsic success, otherwise ```false```940   */941  async setProperties(signer: TSigner, collectionId: number, properties: IProperty[]): Promise<boolean> {942    const result = await this.helper.executeExtrinsic(943      signer,944      'api.tx.unique.setCollectionProperties', [collectionId, properties],945      true,946    );947948    return this.helper.util.findCollectionInEvents(result.result.events, collectionId, 'common', 'CollectionPropertySet');949  }950951  /**952   * Get collection properties.953   * 954   * @param collectionId ID of collection955   * @param propertyKeys optionally filter the returned properties to only these keys956   * @example getProperties(1219, ['location', 'date', 'time', 'isParadise']);957   * @returns array of key-value pairs958   */959  async getProperties(collectionId: number, propertyKeys?: string[] | null): Promise<IProperty[]> {960    return (await this.helper.callRpc('api.rpc.unique.collectionProperties', [collectionId, propertyKeys])).toHuman();961  }962963  /**964   * Deletes onchain properties from the collection.965   *966   * @param signer keyring of signer967   * @param collectionId ID of collection968   * @param propertyKeys array of property keys to delete969   * @example deleteProperties(aliceKeyring, 10, ["gender", "age"]);970   * @returns ```true``` if extrinsic success, otherwise ```false```971   */972  async deleteProperties(signer: TSigner, collectionId: number, propertyKeys: string[]): Promise<boolean> {973    const result = await this.helper.executeExtrinsic(974      signer,975      'api.tx.unique.deleteCollectionProperties', [collectionId, propertyKeys],976      true,977    );978979    return this.helper.util.findCollectionInEvents(result.result.events, collectionId, 'common', 'CollectionPropertyDeleted');980  }981982  /**983   * Changes the owner of the token.984   *985   * @param signer keyring of signer986   * @param collectionId ID of collection987   * @param tokenId ID of token988   * @param addressObj address of a new owner989   * @param amount amount of tokens to be transfered. For NFT must be set to 1n990   * @example transferToken(aliceKeyring, 10, 5, {Substrate: "5DyN4Y92vZCjv38fg..."})991   * @returns true if the token success, otherwise false992   */993  async transferToken(signer: TSigner, collectionId: number, tokenId: number, addressObj: ICrossAccountId, amount=1n): Promise<boolean> {994    const result = await this.helper.executeExtrinsic(995      signer,996      'api.tx.unique.transfer', [addressObj, collectionId, tokenId, amount],997      true, // `Unable to transfer token #${tokenId} from collection #${collectionId}`,998    );9991000    return this.helper.util.isTokenTransferSuccess(result.result.events, collectionId, tokenId, {Substrate: typeof signer === 'string' ? signer : signer.address}, addressObj, amount);1001  }10021003  /**1004   *1005   * Change ownership of a token(s) on behalf of the owner.1006   *1007   * @param signer keyring of signer1008   * @param collectionId ID of collection1009   * @param tokenId ID of token1010   * @param fromAddressObj address on behalf of which the token will be sent1011   * @param toAddressObj new token owner1012   * @param amount amount of tokens to be transfered. For NFT must be set to 1n1013   * @example transferTokenFrom(aliceKeyring, 10, 5, {Substrate: "5DyN4Y92vZCjv38fg"}, {Ethereum: "0x9F0583DbB85..."})1014   * @returns true if the token success, otherwise false1015   */1016  async transferTokenFrom(signer: TSigner, collectionId: number, tokenId: number, fromAddressObj: ICrossAccountId, toAddressObj: ICrossAccountId, amount=1n): Promise<boolean> {1017    const result = await this.helper.executeExtrinsic(1018      signer,1019      'api.tx.unique.transferFrom', [fromAddressObj, toAddressObj, collectionId, tokenId, amount],1020      true, // `Unable to transfer token #${tokenId} from collection #${collectionId}`,1021    );1022    return this.helper.util.isTokenTransferSuccess(result.result.events, collectionId, tokenId, fromAddressObj, toAddressObj, amount);1023  }10241025  /**1026   *1027   * Destroys a concrete instance of NFT/RFT or burns a specified amount of fungible tokens.1028   *1029   * @param signer keyring of signer1030   * @param collectionId ID of collection1031   * @param tokenId ID of token1032   * @param amount amount of tokens to be burned. For NFT must be set to 1n1033   * @example burnToken(aliceKeyring, 10, 5);1034   * @returns ```true``` if the extrinsic is successful, otherwise ```false```1035   */1036  async burnToken(signer: TSigner, collectionId: number, tokenId: number, amount=1n): Promise<boolean> {1037    const burnResult = await this.helper.executeExtrinsic(1038      signer,1039      'api.tx.unique.burnItem', [collectionId, tokenId, amount],1040      true, // `Unable to burn token for ${label}`,1041    );1042    const burnedTokens = this.helper.util.extractTokensFromBurnResult(burnResult);1043    if (burnedTokens.tokens.length > 1) throw Error('Burned multiple tokens');1044    return burnedTokens.success;1045  }10461047  /**1048   * Destroys a concrete instance of NFT on behalf of the owner1049   *1050   * @param signer keyring of signer1051   * @param collectionId ID of collection1052   * @param tokenId ID of token1053   * @param fromAddressObj address on behalf of which the token will be burnt1054   * @param amount amount of tokens to be burned. For NFT must be set to 1n1055   * @example burnTokenFrom(aliceKeyring, 10, {Substrate: "5DyN4Y92vZCjv38fg..."}, 5, {Ethereum: "0x9F0583DbB85..."})1056   * @returns ```true``` if extrinsic success, otherwise ```false```1057   */1058  async burnTokenFrom(signer: TSigner, collectionId: number, tokenId: number, fromAddressObj: ICrossAccountId, amount=1n): Promise<boolean> {1059    const burnResult = await this.helper.executeExtrinsic(1060      signer,1061      'api.tx.unique.burnFrom', [collectionId, fromAddressObj, tokenId, amount],1062      true, // `Unable to burn token from for ${label}`,1063    );1064    const burnedTokens = this.helper.util.extractTokensFromBurnResult(burnResult);1065    return burnedTokens.success && burnedTokens.tokens.length > 0;1066  }10671068  /**1069   * Set, change, or remove approved address to transfer the ownership of the NFT.1070   *1071   * @param signer keyring of signer1072   * @param collectionId ID of collection1073   * @param tokenId ID of token1074   * @param toAddressObj Substrate or Ethereum address which gets approved use of the signer's tokens1075   * @param amount amount of token to be approved. For NFT must be set to 1n1076   * @returns ```true``` if extrinsic success, otherwise ```false```1077   */1078  async approveToken(signer: IKeyringPair, collectionId: number, tokenId: number, toAddressObj: ICrossAccountId, amount=1n) {1079    const approveResult = await this.helper.executeExtrinsic(1080      signer,1081      'api.tx.unique.approve', [toAddressObj, collectionId, tokenId, amount],1082      true, // `Unable to approve token for ${label}`,1083    );10841085    return this.helper.util.findCollectionInEvents(approveResult.result.events, collectionId, 'common', 'Approved');1086  }10871088  /**1089   * Get the amount of token pieces approved to transfer or burn. Normally 0.1090   *1091   * @param collectionId ID of collection1092   * @param tokenId ID of token1093   * @param toAccountObj address which is approved to use token pieces1094   * @param fromAccountObj address which may have allowed the use of its owned tokens1095   * @example getTokenApprovedPieces(10, 5, {Substrate: "5DyN4Y92vZCjv38fg..."}, {Substrate: "5ERZNF88Mm7UGfPP3mdG..."})1096   * @returns number of approved to transfer pieces1097   */1098  async getTokenApprovedPieces(collectionId: number, tokenId: number, toAccountObj: ICrossAccountId, fromAccountObj: ICrossAccountId): Promise<bigint> {1099    return (await this.helper.callRpc('api.rpc.unique.allowance', [collectionId, fromAccountObj, toAccountObj, tokenId])).toBigInt();1100  }11011102  /**1103   * Get the last created token ID in a collection1104   *1105   * @param collectionId ID of collection1106   * @example getLastTokenId(10);1107   * @returns id of the last created token1108   */1109  async getLastTokenId(collectionId: number): Promise<number> {1110    return (await this.helper.callRpc('api.rpc.unique.lastTokenId', [collectionId])).toNumber();1111  }11121113  /**1114   * Check if token exists1115   *1116   * @param collectionId ID of collection1117   * @param tokenId ID of token1118   * @example doesTokenExist(10, 20);1119   * @returns true if the token exists, otherwise false1120   */1121  async doesTokenExist(collectionId: number, tokenId: number): Promise<boolean> {1122    return (await this.helper.callRpc('api.rpc.unique.tokenExists', [collectionId, tokenId])).toJSON();1123  }1124}11251126class NFTnRFT extends CollectionGroup {1127  /**1128   * Get tokens owned by account1129   *1130   * @param collectionId ID of collection1131   * @param addressObj tokens owner1132   * @example getTokensByAddress(10, {Substrate: "5DyN4Y92vZCjv38fg..."})1133   * @returns array of token ids owned by account1134   */1135  async getTokensByAddress(collectionId: number, addressObj: ICrossAccountId): Promise<number[]> {1136    return (await this.helper.callRpc('api.rpc.unique.accountTokens', [collectionId, addressObj])).toJSON();1137  }11381139  /**1140   * Get token data1141   *1142   * @param collectionId ID of collection1143   * @param tokenId ID of token1144   * @param propertyKeys optionally filter the token properties to only these keys1145   * @param blockHashAt optionally query the data at some block with this hash1146   * @example getToken(10, 5);1147   * @returns human readable token data1148   */1149  async getToken(collectionId: number, tokenId: number, propertyKeys: string[] = [], blockHashAt?: string): Promise<{1150    properties: IProperty[];1151    owner: CrossAccountId;1152    normalizedOwner: CrossAccountId;1153  }| null> {1154    let tokenData;1155    if(typeof blockHashAt === 'undefined') {1156      tokenData = await this.helper.callRpc('api.rpc.unique.tokenData', [collectionId, tokenId]);1157    }1158    else {1159      if(propertyKeys.length == 0) {1160        const collection = (await this.helper.callRpc('api.rpc.unique.collectionById', [collectionId])).toHuman();1161        if(!collection) return null;1162        propertyKeys = collection.tokenPropertyPermissions.map((x: ITokenPropertyPermission) => x.key);1163      }1164      tokenData = await this.helper.callRpc('api.rpc.unique.tokenData', [collectionId, tokenId, propertyKeys, blockHashAt]);1165    }1166    tokenData = tokenData.toHuman();1167    if (tokenData === null || tokenData.owner === null) return null;1168    const owner = {} as any;1169    for (const key of Object.keys(tokenData.owner)) {1170      owner[key.toLocaleLowerCase()] = key.toLocaleLowerCase() == 'substrate' 1171        ? CrossAccountId.normalizeSubstrateAddress(tokenData.owner[key]) 1172        : tokenData.owner[key];1173    }1174    tokenData.normalizedOwner = CrossAccountId.fromLowerCaseKeys(owner);1175    return tokenData;1176  }11771178  /**1179   * Set permissions to change token properties1180   *1181   * @param signer keyring of signer1182   * @param collectionId ID of collection1183   * @param permissions permissions to change a property by the collection admin or token owner1184   * @example setTokenPropertyPermissions(1185   *   aliceKeyring, 10, [{key: "gender", permission: {tokenOwner: true, mutable: true, collectionAdmin: true}}]1186   * )1187   * @returns true if extrinsic success otherwise false1188   */1189  async setTokenPropertyPermissions(signer: TSigner, collectionId: number, permissions: ITokenPropertyPermission[]): Promise<boolean> {1190    const result = await this.helper.executeExtrinsic(1191      signer,1192      'api.tx.unique.setTokenPropertyPermissions', [collectionId, permissions],1193      true,1194    );11951196    return this.helper.util.findCollectionInEvents(result.result.events, collectionId, 'common', 'PropertyPermissionSet');1197  }11981199  /**1200   * Get token property permissions.1201   * 1202   * @param collectionId ID of collection1203   * @param propertyKeys optionally filter the returned property permissions to only these keys1204   * @example getPropertyPermissions(1219, ['location', 'date', 'time', 'isParadise']);1205   * @returns array of key-permission pairs1206   */1207  async getPropertyPermissions(collectionId: number, propertyKeys: string[] | null = null): Promise<ITokenPropertyPermission[]> {1208    return (await this.helper.callRpc('api.rpc.unique.propertyPermissions', [collectionId, ...(propertyKeys === null ? [] : [propertyKeys])])).toHuman();1209  }12101211  /**1212   * Set token properties1213   *1214   * @param signer keyring of signer1215   * @param collectionId ID of collection1216   * @param tokenId ID of token1217   * @param properties key-value pairs of metadata which to add to a token. Keys must be permitted in the collection1218   * @example setTokenProperties(aliceKeyring, 10, 5, [{key: "gender", value: "female"}, {key: "age", value: "23"}])1219   * @returns ```true``` if extrinsic success, otherwise ```false```1220   */1221  async setTokenProperties(signer: TSigner, collectionId: number, tokenId: number, properties: IProperty[]): Promise<boolean> {1222    const result = await this.helper.executeExtrinsic(1223      signer,1224      'api.tx.unique.setTokenProperties', [collectionId, tokenId, properties],1225      true,1226    );12271228    return this.helper.util.findCollectionInEvents(result.result.events, collectionId, 'common', 'TokenPropertySet');1229  }12301231  /**1232   * Get properties, metadata assigned to a token.1233   * 1234   * @param collectionId ID of collection1235   * @param tokenId ID of token1236   * @param propertyKeys optionally filter the returned properties to only these keys1237   * @example getTokenProperties(1219, ['location', 'date', 'time', 'isParadise']);1238   * @returns array of key-value pairs1239   */1240  async getTokenProperties(collectionId: number, tokenId: number, propertyKeys?: string[] | null): Promise<IProperty[]> {1241    return (await this.helper.callRpc('api.rpc.unique.tokenProperties', [collectionId, tokenId, propertyKeys])).toHuman();1242  }12431244  /**1245   * Delete the provided properties of a token1246   * @param signer keyring of signer1247   * @param collectionId ID of collection1248   * @param tokenId ID of token1249   * @param propertyKeys property keys to be deleted1250   * @example deleteTokenProperties(aliceKeyring, 10, 5, ["gender", "age"])1251   * @returns ```true``` if extrinsic success, otherwise ```false```1252   */1253  async deleteTokenProperties(signer: TSigner, collectionId: number, tokenId: number, propertyKeys: string[]): Promise<boolean> {1254    const result = await this.helper.executeExtrinsic(1255      signer,1256      'api.tx.unique.deleteTokenProperties', [collectionId, tokenId, propertyKeys],1257      true,1258    );12591260    return this.helper.util.findCollectionInEvents(result.result.events, collectionId, 'common', 'TokenPropertyDeleted');1261  }12621263  /**1264   * Mint new collection1265   *1266   * @param signer keyring of signer1267   * @param collectionOptions basic collection options and properties1268   * @param mode NFT or RFT type of a collection1269   * @example mintCollection(aliceKeyring, {name: 'New', description: "New collection", tokenPrefix: "NEW"}, "NFT")1270   * @returns object of the created collection1271   */1272  async mintCollection(signer: TSigner, collectionOptions: ICollectionCreationOptions, mode: 'NFT' | 'RFT'): Promise<UniqueBaseCollection> {1273    collectionOptions = JSON.parse(JSON.stringify(collectionOptions)) as ICollectionCreationOptions; // Clone object1274    collectionOptions.mode = (mode === 'NFT') ? {nft: null} : {refungible: null};1275    for (const key of ['name', 'description', 'tokenPrefix']) {1276      if (typeof collectionOptions[key as 'name' | 'description' | 'tokenPrefix'] === 'string') collectionOptions[key as 'name' | 'description' | 'tokenPrefix'] = this.helper.util.str2vec(collectionOptions[key as 'name' | 'description' | 'tokenPrefix'] as string);1277    }1278    const creationResult = await this.helper.executeExtrinsic(1279      signer,1280      'api.tx.unique.createCollectionEx', [collectionOptions],1281      true, // errorLabel,1282    );1283    return this.getCollectionObject(this.helper.util.extractCollectionIdFromCreationResult(creationResult));1284  }12851286  getCollectionObject(_collectionId: number): any {1287    return null;1288  }12891290  getTokenObject(_collectionId: number, _tokenId: number): any {1291    return null;1292  }1293}129412951296class NFTGroup extends NFTnRFT {1297  /**1298   * Get collection object1299   * @param collectionId ID of collection1300   * @example getCollectionObject(2);1301   * @returns instance of UniqueNFTCollection1302   */1303  getCollectionObject(collectionId: number): UniqueNFTCollection {1304    return new UniqueNFTCollection(collectionId, this.helper);1305  }13061307  /**1308   * Get token object1309   * @param collectionId ID of collection1310   * @param tokenId ID of token1311   * @example getTokenObject(10, 5);1312   * @returns instance of UniqueNFTToken1313   */1314  getTokenObject(collectionId: number, tokenId: number): UniqueNFToken {1315    return new UniqueNFToken(tokenId, this.getCollectionObject(collectionId));1316  }13171318  /**1319   * Get token's owner1320   * @param collectionId ID of collection1321   * @param tokenId ID of token1322   * @param blockHashAt optionally query the data at the block with this hash1323   * @example getTokenOwner(10, 5);1324   * @returns Address in CrossAccountId format, e.g. {Substrate: "5DnSF6RRjwteE3BrCj..."}1325   */1326  async getTokenOwner(collectionId: number, tokenId: number, blockHashAt?: string): Promise<CrossAccountId> {1327    let owner;1328    if (typeof blockHashAt === 'undefined') {1329      owner = await this.helper.callRpc('api.rpc.unique.tokenOwner', [collectionId, tokenId]);1330    } else {1331      owner = await this.helper.callRpc('api.rpc.unique.tokenOwner', [collectionId, tokenId, blockHashAt]);1332    }1333    return CrossAccountId.fromLowerCaseKeys(owner.toJSON());1334  }13351336  /**1337   * Is token approved to transfer1338   * @param collectionId ID of collection1339   * @param tokenId ID of token1340   * @param toAccountObj address to be approved1341   * @returns ```true``` if extrinsic success, otherwise ```false```1342   */1343  async isTokenApproved(collectionId: number, tokenId: number, toAccountObj: ICrossAccountId): Promise<boolean> {1344    return (await this.getTokenApprovedPieces(collectionId, tokenId, toAccountObj, await this.getTokenOwner(collectionId, tokenId))) === 1n;1345  }13461347  /**1348   * Changes the owner of the token.1349   *1350   * @param signer keyring of signer1351   * @param collectionId ID of collection1352   * @param tokenId ID of token1353   * @param addressObj address of a new owner1354   * @example transferToken(aliceKeyring, 10, 5, {Substrate: "5DyN4Y92vZCjv38fg..."})1355   * @returns ```true``` if extrinsic success, otherwise ```false```1356   */1357  async transferToken(signer: TSigner, collectionId: number, tokenId: number, addressObj: ICrossAccountId): Promise<boolean> {1358    return await super.transferToken(signer, collectionId, tokenId, addressObj, 1n);1359  }13601361  /**1362   *1363   * Change ownership of a NFT on behalf of the owner.1364   *1365   * @param signer keyring of signer1366   * @param collectionId ID of collection1367   * @param tokenId ID of token1368   * @param fromAddressObj address on behalf of which the token will be sent1369   * @param toAddressObj new token owner1370   * @example transferTokenFrom(aliceKeyring, 10, 5, {Substrate: "5DyN4Y92vZCjv38fg..."}, {Ethereum: "0x9F0583DbB85..."})1371   * @returns ```true``` if extrinsic success, otherwise ```false```1372   */1373  async transferTokenFrom(signer: TSigner, collectionId: number, tokenId: number, fromAddressObj: ICrossAccountId, toAddressObj: ICrossAccountId): Promise<boolean> {1374    return await super.transferTokenFrom(signer, collectionId, tokenId, fromAddressObj, toAddressObj, 1n);1375  }13761377  /**1378   * Recursively find the address that owns the token1379   * @param collectionId ID of collection1380   * @param tokenId ID of token1381   * @param blockHashAt1382   * @example getTokenTopmostOwner(10, 5);1383   * @returns address in CrossAccountId format, e.g. {Substrate: "5DyN4Y92vZCjv38fg..."}1384   */1385  async getTokenTopmostOwner(collectionId: number, tokenId: number, blockHashAt?: string): Promise<CrossAccountId | null> {1386    let owner;1387    if (typeof blockHashAt === 'undefined') {1388      owner = await this.helper.callRpc('api.rpc.unique.topmostTokenOwner', [collectionId, tokenId]);1389    } else {1390      owner = await this.helper.callRpc('api.rpc.unique.topmostTokenOwner', [collectionId, tokenId, blockHashAt]);1391    }13921393    if (owner === null) return null;13941395    return owner.toHuman();1396  }13971398  /**1399   * Get tokens nested in the provided token1400   * @param collectionId ID of collection1401   * @param tokenId ID of token1402   * @param blockHashAt optionally query the data at the block with this hash1403   * @example getTokenChildren(10, 5);1404   * @returns tokens whose depth of nesting is <= 51405   */1406  async getTokenChildren(collectionId: number, tokenId: number, blockHashAt?: string): Promise<IToken[]> {1407    let children;1408    if(typeof blockHashAt === 'undefined') {1409      children = await this.helper.callRpc('api.rpc.unique.tokenChildren', [collectionId, tokenId]);1410    } else {1411      children = await this.helper.callRpc('api.rpc.unique.tokenChildren', [collectionId, tokenId, blockHashAt]);1412    }14131414    return children.toJSON().map((x: any) => {1415      return {collectionId: x.collection, tokenId: x.token};1416    });1417  }14181419  /**1420   * Nest one token into another1421   * @param signer keyring of signer1422   * @param tokenObj token to be nested1423   * @param rootTokenObj token to be parent1424   * @example nestToken(aliceKeyring, {collectionId: 10, tokenId: 5}, {collectionId: 10, tokenId: 4});1425   * @returns ```true``` if extrinsic success, otherwise ```false```1426   */1427  async nestToken(signer: TSigner, tokenObj: IToken, rootTokenObj: IToken): Promise<boolean> {1428    const rootTokenAddress = this.helper.util.getTokenAccount(rootTokenObj);1429    const result = await this.transferToken(signer, tokenObj.collectionId, tokenObj.tokenId, rootTokenAddress);1430    if(!result) {1431      throw Error('Unable to nest token!');1432    }1433    return result;1434  }14351436  /**1437   * Remove token from nested state1438   * @param signer keyring of signer1439   * @param tokenObj token to unnest1440   * @param rootTokenObj parent of a token1441   * @param toAddressObj address of a new token owner1442   * @example unnestToken(aliceKeyring, {collectionId: 10, tokenId: 5}, {collectionId: 10, tokenId: 4}, {Substrate: "5DyN4Y92vZCjv38fg..."});1443   * @returns ```true``` if extrinsic success, otherwise ```false```1444   */1445  async unnestToken(signer: TSigner, tokenObj: IToken, rootTokenObj: IToken, toAddressObj: ICrossAccountId): Promise<boolean> {1446    const rootTokenAddress = this.helper.util.getTokenAccount(rootTokenObj);1447    const result = await this.transferTokenFrom(signer, tokenObj.collectionId, tokenObj.tokenId, rootTokenAddress, toAddressObj);1448    if(!result) {1449      throw Error('Unable to unnest token!');1450    }1451    return result;1452  }14531454  /**1455   * Mint new collection1456   * @param signer keyring of signer1457   * @param collectionOptions Collection options1458   * @example1459   * mintCollection(aliceKeyring, {1460   *   name: 'New',1461   *   description: 'New collection',1462   *   tokenPrefix: 'NEW',1463   * })1464   * @returns object of the created collection1465   */1466  async mintCollection(signer: TSigner, collectionOptions: ICollectionCreationOptions = {}): Promise<UniqueNFTCollection> {1467    return await super.mintCollection(signer, collectionOptions, 'NFT') as UniqueNFTCollection;1468  }14691470  /**1471   * Mint new token1472   * @param signer keyring of signer1473   * @param data token data1474   * @returns created token object1475   */1476  async mintToken(signer: TSigner, data: { collectionId: number; owner: ICrossAccountId | string; properties?: IProperty[]; }): Promise<UniqueNFToken> {1477    const creationResult = await this.helper.executeExtrinsic(1478      signer,1479      'api.tx.unique.createItem', [data.collectionId, (typeof data.owner === 'string') ? {Substrate: data.owner} : data.owner, {1480        nft: {1481          properties: data.properties,1482        },1483      }],1484      true,1485    );1486    const createdTokens = this.helper.util.extractTokensFromCreationResult(creationResult);1487    if (createdTokens.tokens.length > 1) throw Error('Minted multiple tokens');1488    if (createdTokens.tokens.length < 1) throw Error('No tokens minted');1489    return this.getTokenObject(data.collectionId, createdTokens.tokens[0].tokenId);1490  }14911492  /**1493   * Mint multiple NFT tokens1494   * @param signer keyring of signer1495   * @param collectionId ID of collection1496   * @param tokens array of tokens with owner and properties1497   * @example1498   * mintMultipleTokens(aliceKeyring, 10, [{1499   *     owner: {Substrate: "5DyN4Y92vZCjv38fg..."},1500   *     properties: [{key: "gender", value: "male"},{key: "age", value: "45"}],1501   *   },{1502   *     owner: {Ethereum: "0x9F0583DbB855d..."},1503   *     properties: [{key: "gender", value: "female"},{key: "age", value: "22"}],1504   * }]);1505   * @returns ```true``` if extrinsic success, otherwise ```false```1506   */1507  async mintMultipleTokens(signer: TSigner, collectionId: number, tokens: {owner: ICrossAccountId, properties?: IProperty[]}[]): Promise<UniqueNFToken[]> {1508    const creationResult = await this.helper.executeExtrinsic(1509      signer,1510      'api.tx.unique.createMultipleItemsEx', [collectionId, {NFT: tokens}],1511      true,1512    );1513    const collection = this.getCollectionObject(collectionId);1514    return this.helper.util.extractTokensFromCreationResult(creationResult).tokens.map((x: IToken) => collection.getTokenObject(x.tokenId));1515  }15161517  /**1518   * Mint multiple NFT tokens with one owner1519   * @param signer keyring of signer1520   * @param collectionId ID of collection1521   * @param owner tokens owner1522   * @param tokens array of tokens with owner and properties1523   * @example1524   * mintMultipleTokensWithOneOwner(aliceKeyring, 10, "5DyN4Y92vZCjv38fg...", [{1525   *   properties: [{1526   *   key: "gender",1527   *   value: "female",1528   *  },{1529   *   key: "age",1530   *   value: "33",1531   *  }],1532   * }]);1533   * @returns array of newly created tokens1534   */1535  async mintMultipleTokensWithOneOwner(signer: TSigner, collectionId: number, owner: ICrossAccountId, tokens: {properties?: IProperty[]}[]): Promise<UniqueNFToken[]> {1536    const rawTokens = [];1537    for (const token of tokens) {1538      const raw = {NFT: {properties: token.properties}};1539      rawTokens.push(raw);1540    }1541    const creationResult = await this.helper.executeExtrinsic(1542      signer,1543      'api.tx.unique.createMultipleItems', [collectionId, owner, rawTokens],1544      true,1545    );1546    const collection = this.getCollectionObject(collectionId);1547    return this.helper.util.extractTokensFromCreationResult(creationResult).tokens.map((x: IToken) => collection.getTokenObject(x.tokenId));1548  }15491550  /**1551   * Set, change, or remove approved address to transfer the ownership of the NFT.1552   *1553   * @param signer keyring of signer1554   * @param collectionId ID of collection1555   * @param tokenId ID of token1556   * @param toAddressObj address to approve1557   * @example approveToken(aliceKeyring, 10, 5, {Substrate: "5DyN4Y92vZCjv38fg..."})1558   * @returns ```true``` if extrinsic success, otherwise ```false```1559   */1560  async approveToken(signer: IKeyringPair, collectionId: number, tokenId: number, toAddressObj: ICrossAccountId) {1561    return super.approveToken(signer, collectionId, tokenId, toAddressObj, 1n);1562  }1563}156415651566class RFTGroup extends NFTnRFT {1567  /**1568   * Get collection object1569   * @param collectionId ID of collection1570   * @example getCollectionObject(2);1571   * @returns instance of UniqueRFTCollection1572   */1573  getCollectionObject(collectionId: number): UniqueRFTCollection {1574    return new UniqueRFTCollection(collectionId, this.helper);1575  }15761577  /**1578   * Get token object1579   * @param collectionId ID of collection1580   * @param tokenId ID of token1581   * @example getTokenObject(10, 5);1582   * @returns instance of UniqueNFTToken1583   */1584  getTokenObject(collectionId: number, tokenId: number): UniqueRFToken {1585    return new UniqueRFToken(tokenId, this.getCollectionObject(collectionId));1586  }15871588  /**1589   * Get top 10 token owners with the largest number of pieces1590   * @param collectionId ID of collection1591   * @param tokenId ID of token1592   * @example getTokenTop10Owners(10, 5);1593   * @returns array of top 10 owners1594   */1595  async getTokenTop10Owners(collectionId: number, tokenId: number): Promise<CrossAccountId[]> {1596    return (await this.helper.callRpc('api.rpc.unique.tokenOwners', [collectionId, tokenId])).toJSON().map(CrossAccountId.fromLowerCaseKeys);1597  }15981599  /**1600   * Get number of pieces owned by address1601   * @param collectionId ID of collection1602   * @param tokenId ID of token1603   * @param addressObj address token owner1604   * @example getTokenBalance(10, 5, {Substrate: "5DyN4Y92vZCjv38fg..."});1605   * @returns number of pieces ownerd by address1606   */1607  async getTokenBalance(collectionId: number, tokenId: number, addressObj: ICrossAccountId): Promise<bigint> {1608    return (await this.helper.callRpc('api.rpc.unique.balance', [collectionId, addressObj, tokenId])).toBigInt();1609  }16101611  /**1612   * Transfer pieces of token to another address1613   * @param signer keyring of signer1614   * @param collectionId ID of collection1615   * @param tokenId ID of token1616   * @param addressObj address of a new owner1617   * @param amount number of pieces to be transfered1618   * @example transferTokenFrom(aliceKeyring, 10, 5, {Substrate: "5DyN4Y92vZCjv38fg..."}, 2000n)1619   * @returns ```true``` if extrinsic success, otherwise ```false```1620   */1621  async transferToken(signer: TSigner, collectionId: number, tokenId: number, addressObj: ICrossAccountId, amount=1n): Promise<boolean> {1622    return await super.transferToken(signer, collectionId, tokenId, addressObj, amount);1623  }16241625  /**1626   * Change ownership of some pieces of RFT on behalf of the owner.1627   * @param signer keyring of signer1628   * @param collectionId ID of collection1629   * @param tokenId ID of token1630   * @param fromAddressObj address on behalf of which the token will be sent1631   * @param toAddressObj new token owner1632   * @param amount number of pieces to be transfered1633   * @example transferTokenFrom(aliceKeyring, 10, 5, {Substrate: "5DyN4Y92vZCjv38fg..."}, {Substrate: "5DfhbVfww7ThF8q6f3i..."}, 2000n)1634   * @returns ```true``` if extrinsic success, otherwise ```false```1635   */1636  async transferTokenFrom(signer: TSigner, collectionId: number, tokenId: number, fromAddressObj: ICrossAccountId, toAddressObj: ICrossAccountId, amount=1n): Promise<boolean> {1637    return await super.transferTokenFrom(signer, collectionId, tokenId, fromAddressObj, toAddressObj, amount);1638  }16391640  /**1641   * Mint new collection1642   * @param signer keyring of signer1643   * @param collectionOptions Collection options1644   * @example1645   * mintCollection(aliceKeyring, {1646   *   name: 'New',1647   *   description: 'New collection',1648   *   tokenPrefix: 'NEW',1649   * })1650   * @returns object of the created collection1651   */1652  async mintCollection(signer: TSigner, collectionOptions: ICollectionCreationOptions = {}): Promise<UniqueRFTCollection> {1653    return await super.mintCollection(signer, collectionOptions, 'RFT') as UniqueRFTCollection;1654  }16551656  /**1657   * Mint new token1658   * @param signer keyring of signer1659   * @param data token data1660   * @example mintToken(aliceKeyring, {collectionId: 10, owner: {Substrate: '5GHoZe9c73RYbVzq...'}, pieces: 10000n});1661   * @returns created token object1662   */1663  async mintToken(signer: TSigner, data: { collectionId: number; owner: ICrossAccountId | string; pieces: bigint; properties?: IProperty[]; }): Promise<UniqueRFToken> {1664    const creationResult = await this.helper.executeExtrinsic(1665      signer,1666      'api.tx.unique.createItem', [data.collectionId, (typeof data.owner === 'string') ? {Substrate: data.owner} : data.owner, {1667        refungible: {1668          pieces: data.pieces,1669          properties: data.properties,1670        },1671      }],1672      true,1673    );1674    const createdTokens = this.helper.util.extractTokensFromCreationResult(creationResult);1675    if (createdTokens.tokens.length > 1) throw Error('Minted multiple tokens');1676    if (createdTokens.tokens.length < 1) throw Error('No tokens minted');1677    return this.getTokenObject(data.collectionId, createdTokens.tokens[0].tokenId);1678  }16791680  async mintMultipleTokens(signer: TSigner, collectionId: number, tokens: {owner: ICrossAccountId, pieces: bigint, properties?: IProperty[]}[]): Promise<UniqueRFToken[]> {1681    throw Error('Not implemented');1682    const creationResult = await this.helper.executeExtrinsic(1683      signer,1684      'api.tx.unique.createMultipleItemsEx', [collectionId, {RefungibleMultipleOwners: tokens}],1685      true, // `Unable to mint RFT tokens for ${label}`,1686    );1687    const collection = this.getCollectionObject(collectionId);1688    return this.helper.util.extractTokensFromCreationResult(creationResult).tokens.map((x: IToken) => collection.getTokenObject(x.tokenId));1689  }16901691  /**1692   * Mint multiple RFT tokens with one owner1693   * @param signer keyring of signer1694   * @param collectionId ID of collection1695   * @param owner tokens owner1696   * @param tokens array of tokens with properties and pieces1697   * @example mintMultipleTokensWithOneOwner(aliceKeyring, 10, {Substrate: "5GHoZe9c73RYbVzq..."}, [{pieces: 100000n, properties: [{key: "gender", value: "male"}]}]);1698   * @returns array of newly created RFT tokens1699   */1700  async mintMultipleTokensWithOneOwner(signer: TSigner, collectionId: number, owner: ICrossAccountId, tokens: {pieces: bigint, properties?: IProperty[]}[]): Promise<UniqueRFToken[]> {1701    const rawTokens = [];1702    for (const token of tokens) {1703      const raw = {ReFungible: {pieces: token.pieces, properties: token.properties}};1704      rawTokens.push(raw);1705    }1706    const creationResult = await this.helper.executeExtrinsic(1707      signer,1708      'api.tx.unique.createMultipleItems', [collectionId, owner, rawTokens],1709      true,1710    );1711    const collection = this.getCollectionObject(collectionId);1712    return this.helper.util.extractTokensFromCreationResult(creationResult).tokens.map((x: IToken) => collection.getTokenObject(x.tokenId));1713  }17141715  /**1716   * Destroys a concrete instance of RFT.1717   * @param signer keyring of signer1718   * @param collectionId ID of collection1719   * @param tokenId ID of token1720   * @param amount number of pieces to be burnt1721   * @example burnToken(aliceKeyring, 10, 5);1722   * @returns ```true``` if the extrinsic is successful, otherwise ```false```1723   */1724  async burnToken(signer: IKeyringPair, collectionId: number, tokenId: number, amount=1n): Promise<boolean> {1725    return await super.burnToken(signer, collectionId, tokenId, amount);1726  }17271728  /**1729   * Destroys a concrete instance of RFT on behalf of the owner.1730   * @param signer keyring of signer1731   * @param collectionId ID of collection1732   * @param tokenId ID of token1733   * @param fromAddressObj address on behalf of which the token will be burnt1734   * @param amount number of pieces to be burnt1735   * @example burnTokenFrom(aliceKeyring, 10, 5, {Substrate: "5DyN4Y92vZCjv38fg..."}, 2n)1736   * @returns ```true``` if extrinsic success, otherwise ```false```1737   */1738  async burnTokenFrom(signer: IKeyringPair, collectionId: number, tokenId: number, fromAddressObj: ICrossAccountId, amount=1n): Promise<boolean> {1739    return await super.burnTokenFrom(signer, collectionId, tokenId, fromAddressObj, amount);1740  }17411742  /**1743   * Set, change, or remove approved address to transfer the ownership of the RFT.1744   *1745   * @param signer keyring of signer1746   * @param collectionId ID of collection1747   * @param tokenId ID of token1748   * @param toAddressObj address to approve1749   * @param amount number of pieces to be approved1750   * @example approveToken(aliceKeyring, 10, 5, {Substrate: "5GHoZe9c73RYbVzq..."}, "", 10000n);1751   * @returns true if the token success, otherwise false1752   */1753  async approveToken(signer: IKeyringPair, collectionId: number, tokenId: number, toAddressObj: ICrossAccountId, amount=1n) {1754    return super.approveToken(signer, collectionId, tokenId, toAddressObj, amount);1755  }17561757  /**1758   * Get total number of pieces1759   * @param collectionId ID of collection1760   * @param tokenId ID of token1761   * @example getTokenTotalPieces(10, 5);1762   * @returns number of pieces1763   */1764  async getTokenTotalPieces(collectionId: number, tokenId: number): Promise<bigint> {1765    return (await this.helper.callRpc('api.rpc.unique.totalPieces', [collectionId, tokenId])).unwrap().toBigInt();1766  }17671768  /**1769   * Change number of token pieces. Signer must be the owner of all token pieces.1770   * @param signer keyring of signer1771   * @param collectionId ID of collection1772   * @param tokenId ID of token1773   * @param amount new number of pieces1774   * @example repartitionToken(aliceKeyring, 10, 5, 12345n);1775   * @returns true if the repartion was success, otherwise false1776   */1777  async repartitionToken(signer: TSigner, collectionId: number, tokenId: number, amount: bigint): Promise<boolean> {1778    const currentAmount = await this.getTokenTotalPieces(collectionId, tokenId);1779    const repartitionResult = await this.helper.executeExtrinsic(1780      signer,1781      'api.tx.unique.repartition', [collectionId, tokenId, amount],1782      true,1783    );1784    if(currentAmount < amount) return this.helper.util.findCollectionInEvents(repartitionResult.result.events, collectionId, 'common', 'ItemCreated');1785    return this.helper.util.findCollectionInEvents(repartitionResult.result.events, collectionId, 'common', 'ItemDestroyed');1786  }1787}178817891790class FTGroup extends CollectionGroup {1791  /**1792   * Get collection object1793   * @param collectionId ID of collection1794   * @example getCollectionObject(2);1795   * @returns instance of UniqueFTCollection1796   */1797  getCollectionObject(collectionId: number): UniqueFTCollection {1798    return new UniqueFTCollection(collectionId, this.helper);1799  }18001801  /**1802   * Mint new fungible collection1803   * @param signer keyring of signer1804   * @param collectionOptions Collection options1805   * @param decimalPoints number of token decimals1806   * @example1807   * mintCollection(aliceKeyring, {1808   *   name: 'New',1809   *   description: 'New collection',1810   *   tokenPrefix: 'NEW',1811   * }, 18)1812   * @returns newly created fungible collection1813   */1814  async mintCollection(signer: TSigner, collectionOptions: ICollectionCreationOptions = {}, decimalPoints = 0): Promise<UniqueFTCollection> {1815    collectionOptions = JSON.parse(JSON.stringify(collectionOptions)) as ICollectionCreationOptions; // Clone object1816    if(collectionOptions.tokenPropertyPermissions) throw Error('Fungible collections has no tokenPropertyPermissions');1817    collectionOptions.mode = {fungible: decimalPoints};1818    for (const key of ['name', 'description', 'tokenPrefix']) {1819      if (typeof collectionOptions[key as 'name' | 'description' | 'tokenPrefix'] === 'string') collectionOptions[key as 'name' | 'description' | 'tokenPrefix'] = this.helper.util.str2vec(collectionOptions[key as 'name' | 'description' | 'tokenPrefix'] as string);1820    }1821    const creationResult = await this.helper.executeExtrinsic(1822      signer,1823      'api.tx.unique.createCollectionEx', [collectionOptions],1824      true,1825    );1826    return this.getCollectionObject(this.helper.util.extractCollectionIdFromCreationResult(creationResult));1827  }18281829  /**1830   * Mint tokens1831   * @param signer keyring of signer1832   * @param collectionId ID of collection1833   * @param owner address owner of new tokens1834   * @param amount amount of tokens to be meanted1835   * @example mintTokens(aliceKeyring, 10, {Substrate: "5GHoZe9c73RYbVzq"}, 1000n);1836   * @returns ```true``` if extrinsic success, otherwise ```false```1837   */1838  async mintTokens(signer: TSigner, collectionId: number, amount: bigint, owner: ICrossAccountId | string): Promise<boolean> {1839    const creationResult = await this.helper.executeExtrinsic(1840      signer,1841      'api.tx.unique.createItem', [collectionId, (typeof owner === 'string') ? {Substrate: owner} : owner, {1842        fungible: {1843          value: amount,1844        },1845      }],1846      true, // `Unable to mint fungible tokens for ${label}`,1847    );1848    return this.helper.util.findCollectionInEvents(creationResult.result.events, collectionId, 'common', 'ItemCreated');1849  }18501851  /**1852   * Mint multiple Fungible tokens with one owner1853   * @param signer keyring of signer1854   * @param collectionId ID of collection1855   * @param owner tokens owner1856   * @param tokens array of tokens with properties and pieces1857   * @returns ```true``` if extrinsic success, otherwise ```false```1858   */1859  async mintMultipleTokensWithOneOwner(signer: TSigner, collectionId: number, tokens: {value: bigint}[], owner: ICrossAccountId): Promise<boolean> {1860    const rawTokens = [];1861    for (const token of tokens) {1862      const raw = {Fungible: {Value: token.value}};1863      rawTokens.push(raw);1864    }1865    const creationResult = await this.helper.executeExtrinsic(1866      signer,1867      'api.tx.unique.createMultipleItems', [collectionId, owner, rawTokens],1868      true,1869    );1870    return this.helper.util.findCollectionInEvents(creationResult.result.events, collectionId, 'common', 'ItemCreated');1871  }18721873  /**1874   * Get the top 10 owners with the largest balance for the Fungible collection1875   * @param collectionId ID of collection1876   * @example getTop10Owners(10);1877   * @returns array of ```ICrossAccountId```1878   */1879  async getTop10Owners(collectionId: number): Promise<CrossAccountId[]> {1880    return (await this.helper.callRpc('api.rpc.unique.tokenOwners', [collectionId, 0])).toJSON().map(CrossAccountId.fromLowerCaseKeys);1881  }18821883  /**1884   * Get account balance1885   * @param collectionId ID of collection1886   * @param addressObj address of owner1887   * @example getBalance(10, {Substrate: "5GHoZe9c73RYbVzq..."})1888   * @returns amount of fungible tokens owned by address1889   */1890  async getBalance(collectionId: number, addressObj: ICrossAccountId): Promise<bigint> {1891    return (await this.helper.callRpc('api.rpc.unique.balance', [collectionId, addressObj, 0])).toBigInt();1892  }18931894  /**1895   * Transfer tokens to address1896   * @param signer keyring of signer1897   * @param collectionId ID of collection1898   * @param toAddressObj address recipient1899   * @param amount amount of tokens to be sent1900   * @example transfer(aliceKeyring, 10, {Substrate: "5GHoZe9c73RYbVzq..."}, 1000n);1901   * @returns ```true``` if extrinsic success, otherwise ```false```1902   */1903  async transfer(signer: TSigner, collectionId: number, toAddressObj: ICrossAccountId, amount=1n) {1904    return await super.transferToken(signer, collectionId, 0, toAddressObj, amount);1905  }19061907  /**1908   * Transfer some tokens on behalf of the owner.1909   * @param signer keyring of signer1910   * @param collectionId ID of collection1911   * @param fromAddressObj address on behalf of which tokens will be sent1912   * @param toAddressObj address where token to be sent1913   * @param amount number of tokens to be sent1914   * @example transferFrom(aliceKeyring, 10, {Substrate: "5GHoZe9c73RYbVzq..."}, {Substrate: "5DfhbVfww7ThF8q6f3ij..."}, 10000n);1915   * @returns ```true``` if extrinsic success, otherwise ```false```1916   */1917  async transferFrom(signer: TSigner, collectionId: number, fromAddressObj: ICrossAccountId, toAddressObj: ICrossAccountId, amount=1n) {1918    return await super.transferTokenFrom(signer, collectionId, 0, fromAddressObj, toAddressObj, amount);1919  }19201921  /**1922   * Destroy some amount of tokens1923   * @param signer keyring of signer1924   * @param collectionId ID of collection1925   * @param amount amount of tokens to be destroyed1926   * @example burnTokens(aliceKeyring, 10, 1000n);1927   * @returns ```true``` if extrinsic success, otherwise ```false```1928   */1929  async burnTokens(signer: IKeyringPair, collectionId: number, amount=1n): Promise<boolean> {1930    return await super.burnToken(signer, collectionId, 0, amount);1931  }19321933  /**1934   * Burn some tokens on behalf of the owner.1935   * @param signer keyring of signer1936   * @param collectionId ID of collection1937   * @param fromAddressObj address on behalf of which tokens will be burnt1938   * @param amount amount of tokens to be burnt1939   * @example burnTokensFrom(aliceKeyring, 10, {Substrate: "5GHoZe9c73RYbVzq..."}, 1000n);1940   * @returns ```true``` if extrinsic success, otherwise ```false```1941   */1942  async burnTokensFrom(signer: IKeyringPair, collectionId: number, fromAddressObj: ICrossAccountId, amount=1n): Promise<boolean> {1943    return await super.burnTokenFrom(signer, collectionId, 0, fromAddressObj, amount);1944  }19451946  /**1947   * Get total collection supply1948   * @param collectionId1949   * @returns1950   */1951  async getTotalPieces(collectionId: number): Promise<bigint> {1952    return (await this.helper.callRpc('api.rpc.unique.totalPieces', [collectionId, 0])).unwrap().toBigInt();1953  }19541955  /**1956   * Set, change, or remove approved address to transfer tokens.1957   *1958   * @param signer keyring of signer1959   * @param collectionId ID of collection1960   * @param toAddressObj address to be approved1961   * @param amount amount of tokens to be approved1962   * @example approveTokens(aliceKeyring, 10, {Substrate: "5GHoZe9c73RYbVzq..."}, 1000n)1963   * @returns ```true``` if extrinsic success, otherwise ```false```1964   */1965  async approveTokens(signer: IKeyringPair, collectionId: number, toAddressObj: ICrossAccountId, amount=1n) {1966    return super.approveToken(signer, collectionId, 0, toAddressObj, amount);1967  }19681969  /**1970   * Get amount of fungible tokens approved to transfer1971   * @param collectionId ID of collection1972   * @param fromAddressObj owner of tokens1973   * @param toAddressObj the address approved for the transfer of tokens on behalf of the owner1974   * @returns number of tokens approved for the transfer1975   */1976  async getApprovedTokens(collectionId: number, fromAddressObj: ICrossAccountId, toAddressObj: ICrossAccountId) {1977    return super.getTokenApprovedPieces(collectionId, 0, toAddressObj, fromAddressObj);1978  }1979}198019811982class ChainGroup extends HelperGroup {1983  /**1984   * Get system properties of a chain1985   * @example getChainProperties();1986   * @returns ss58Format, token decimals, and token symbol1987   */1988  getChainProperties(): IChainProperties {1989    const properties = (this.helper.api as any).registry.getChainProperties().toJSON();1990    return {1991      ss58Format: properties.ss58Format.toJSON(),1992      tokenDecimals: properties.tokenDecimals.toJSON(),1993      tokenSymbol: properties.tokenSymbol.toJSON(),1994    };1995  }19961997  /**1998   * Get chain header1999   * @example getLatestBlockNumber();2000   * @returns the number of the last block2001   */2002  async getLatestBlockNumber(): Promise<number> {2003    return (await this.helper.callRpc('api.rpc.chain.getHeader')).number.toNumber();2004  }20052006  /**2007   * Get block hash by block number2008   * @param blockNumber number of block2009   * @example getBlockHashByNumber(12345);2010   * @returns hash of a block2011   */2012  async getBlockHashByNumber(blockNumber: number): Promise<string | null> {2013    const blockHash = (await this.helper.callRpc('api.rpc.chain.getBlockHash', [blockNumber])).toJSON();2014    if(blockHash === '0x0000000000000000000000000000000000000000000000000000000000000000') return null;2015    return blockHash;2016  }20172018  // TODO add docs2019  async getBlock(blockHashOrNumber: string | number): Promise<IBlock | null> {2020    const blockHash = typeof blockHashOrNumber === 'string' ? blockHashOrNumber : await this.getBlockHashByNumber(blockHashOrNumber);2021    if (!blockHash) return null;2022    return (await this.helper.callRpc('api.rpc.chain.getBlock', [blockHash])).toHuman().block;2023  }20242025  /**2026   * Get account nonce2027   * @param address substrate address2028   * @example getNonce("5GrwvaEF5zXb26Fz...");2029   * @returns number, account's nonce2030   */2031  async getNonce(address: TSubstrateAccount): Promise<number> {2032    return (await (this.helper.api as any).query.system.account(address)).nonce.toNumber();2033  }2034}203520362037class BalanceGroup extends HelperGroup {2038  getCollectionCreationPrice(): bigint {2039    return 2n * this.helper.balance.getOneTokenNominal();2040  }2041  /**2042   * Representation of the native token in the smallest unit - one OPAL (OPL), QUARTZ (QTZ), or UNIQUE (UNQ).2043   * @example getOneTokenNominal()2044   * @returns ```BigInt``` representation of the native token in the smallest unit, e.g. ```1_000_000_000_000_000_000n``` for QTZ.2045   */2046  getOneTokenNominal(): bigint {2047    const chainProperties = this.helper.chain.getChainProperties();2048    return 10n ** BigInt((chainProperties.tokenDecimals || [18])[0]);2049  }20502051  /**2052   * Get substrate address balance2053   * @param address substrate address2054   * @example getSubstrate("5GrwvaEF5zXb26Fz...")2055   * @returns amount of tokens on address2056   */2057  async getSubstrate(address: TSubstrateAccount): Promise<bigint> {2058    return (await this.helper.callRpc('api.query.system.account', [address])).data.free.toBigInt();2059  }20602061  /**2062   * Get full substrate balance including free, miscFrozen, feeFrozen, and reserved2063   * @param address substrate address2064   * @returns2065   */2066  async getSubstrateFull(address: TSubstrateAccount): Promise<ISubstrateBalance> {2067    const accountInfo = (await this.helper.callRpc('api.query.system.account', [address])).data;2068    return {free: accountInfo.free.toBigInt(), miscFrozen: accountInfo.miscFrozen.toBigInt(), feeFrozen: accountInfo.feeFrozen.toBigInt(), reserved: accountInfo.reserved.toBigInt()};2069  }20702071  /**2072   * Get ethereum address balance2073   * @param address ethereum address2074   * @example getEthereum("0x9F0583DbB855d...")2075   * @returns amount of tokens on address2076   */2077  async getEthereum(address: TEthereumAccount): Promise<bigint> {2078    return (await this.helper.callRpc('api.rpc.eth.getBalance', [address])).toBigInt();2079  }20802081  /**2082   * Transfer tokens to substrate address2083   * @param signer keyring of signer2084   * @param address substrate address of a recipient2085   * @param amount amount of tokens to be transfered2086   * @example transferToSubstrate(aliceKeyring, "5GrwvaEF5zXb26Fz...", 100_000_000_000n);2087   * @returns ```true``` if extrinsic success, otherwise ```false```2088   */2089  async transferToSubstrate(signer: TSigner, address: TSubstrateAccount, amount: bigint | string): Promise<boolean> {2090    const result = await this.helper.executeExtrinsic(signer, 'api.tx.balances.transfer', [address, amount], true/*, `Unable to transfer balance from ${this.helper.getSignerAddress(signer)} to ${address}`*/);20912092    let transfer = {from: null, to: null, amount: 0n} as any;2093    result.result.events.forEach(({event: {data, method, section}}) => {2094      if ((section === 'balances') && (method === 'Transfer')) {2095        transfer = {2096          from: this.helper.address.normalizeSubstrate(data[0]),2097          to: this.helper.address.normalizeSubstrate(data[1]),2098          amount: BigInt(data[2]),2099        };2100      }2101    });2102    const isSuccess = this.helper.address.normalizeSubstrate(typeof signer === 'string' ? signer : signer.address) === transfer.from 2103      && this.helper.address.normalizeSubstrate(address) === transfer.to 2104      && BigInt(amount) === transfer.amount;2105    return isSuccess;2106  }2107}210821092110class AddressGroup extends HelperGroup {2111  /**2112   * Normalizes the address to the specified ss58 format, by default ```42```.2113   * @param address substrate address2114   * @param ss58Format format for address conversion, by default ```42```2115   * @example normalizeSubstrate("unjKJQJrRd238pkUZZvzDQrfKuM39zBSnQ5zjAGAGcdRhaJTx") // returns 5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY2116   * @returns substrate address converted to normalized (i.e., starting with 5) or specified explicitly representation2117   */2118  normalizeSubstrate(address: TSubstrateAccount, ss58Format = 42): TSubstrateAccount {2119    return CrossAccountId.normalizeSubstrateAddress(address, ss58Format);2120  }21212122  /**2123   * Get address in the connected chain format2124   * @param address substrate address2125   * @example normalizeSubstrateToChainFormat("5GrwvaEF5zXb26Fz...") // returns unjKJQJrRd238pkUZZ... for Unique Network2126   * @returns address in chain format2127   */2128  normalizeSubstrateToChainFormat(address: TSubstrateAccount): TSubstrateAccount {2129    return this.normalizeSubstrate(address, this.helper.chain.getChainProperties().ss58Format);2130  }21312132  /**2133   * Get substrate mirror of an ethereum address2134   * @param ethAddress ethereum address2135   * @param toChainFormat false for normalized account2136   * @example ethToSubstrate('0x9F0583DbB855d...')2137   * @returns substrate mirror of a provided ethereum address2138   */2139  ethToSubstrate(ethAddress: TEthereumAccount, toChainFormat=false): TSubstrateAccount {2140    return CrossAccountId.translateEthToSub(ethAddress, toChainFormat ? this.helper.chain.getChainProperties().ss58Format : undefined);2141  }21422143  /**2144   * Get ethereum mirror of a substrate address2145   * @param subAddress substrate account2146   * @example substrateToEth("5DnSF6RRjwteE3BrC...")2147   * @returns ethereum mirror of a provided substrate address2148   */2149  substrateToEth(subAddress: TSubstrateAccount): TEthereumAccount {2150    return CrossAccountId.translateSubToEth(subAddress);2151  }2152}21532154class StakingGroup extends HelperGroup {2155  /**2156   * Stake tokens for App Promotion2157   * @param signer keyring of signer2158   * @param amountToStake amount of tokens to stake2159   * @param label extra label for log2160   * @returns2161   */2162  async stake(signer: TSigner, amountToStake: bigint, label?: string): Promise<boolean> {2163    if(typeof label === 'undefined') label = `${signer.address} amount: ${amountToStake}`;2164    const _stakeResult = await this.helper.executeExtrinsic(2165      signer, 'api.tx.appPromotion.stake',2166      [amountToStake], true,2167    );2168    // TODO extract info from stakeResult2169    return true;2170  }21712172  /**2173   * Unstake tokens for App Promotion2174   * @param signer keyring of signer2175   * @param amountToUnstake amount of tokens to unstake2176   * @param label extra label for log2177   * @returns block number where balances will be unlocked2178   */2179  async unstake(signer: TSigner, label?: string): Promise<number> {2180    if(typeof label === 'undefined') label = `${signer.address}`;2181    const _unstakeResult = await this.helper.executeExtrinsic(2182      signer, 'api.tx.appPromotion.unstake',2183      [], true,2184    );2185    // TODO extract block number fron events2186    return 1;2187  }21882189  /**2190   * Get total staked amount for address2191   * @param address substrate or ethereum address2192   * @returns total staked amount2193   */2194  async getTotalStaked(address?: ICrossAccountId): Promise<bigint> {2195    if (address) return (await this.helper.callRpc('api.rpc.appPromotion.totalStaked', [address])).toBigInt();2196    return (await this.helper.callRpc('api.rpc.appPromotion.totalStaked')).toBigInt();2197  }21982199  /**2200   * Get total staked per block2201   * @param address substrate or ethereum address2202   * @returns array of stakes. `block` – the number of the block in which the stake was made. `amount` - the number of tokens staked in the block2203   */2204  async getTotalStakedPerBlock(address: ICrossAccountId): Promise<IStakingInfo[]> {2205    const rawTotalStakerdPerBlock = await this.helper.callRpc('api.rpc.appPromotion.totalStakedPerBlock', [address]);2206    return rawTotalStakerdPerBlock.map(([block, amount]: any[]) => {2207      return { 2208        block: block.toBigInt(),2209        amount: amount.toBigInt(),2210      };2211    });2212  }22132214  /**2215   * Get total pending unstake amount for address2216   * @param address substrate or ethereum address2217   * @returns total pending unstake amount2218   */2219  async getPendingUnstake(address: ICrossAccountId): Promise<bigint> {2220    return (await this.helper.callRpc('api.rpc.appPromotion.pendingUnstake', [address])).toBigInt();2221  }22222223  /**2224   * Get pending unstake amount per block for address2225   * @param address substrate or ethereum address2226   * @returns array of pending stakes. `block` – the number of the block in which the unstake was made. `amount` - the number of tokens unstaked in the block2227   */2228  async getPendingUnstakePerBlock(address: ICrossAccountId): Promise<IStakingInfo[]> {2229    const rawUnstakedPerBlock = await this.helper.callRpc('api.rpc.appPromotion.pendingUnstakePerBlock', [address]);2230    const result = rawUnstakedPerBlock.map(([block, amount]: any[]) => {2231      return {2232        block: block.toBigInt(),2233        amount: amount.toBigInt(),2234      };2235    });2236    return result;2237  }2238}22392240export class UniqueHelper extends ChainHelperBase {2241  chain: ChainGroup;2242  balance: BalanceGroup;2243  address: AddressGroup;2244  collection: CollectionGroup;2245  nft: NFTGroup;2246  rft: RFTGroup;2247  ft: FTGroup;2248  staking: StakingGroup;22492250  constructor(logger?: ILogger) {2251    super(logger);2252    this.chain = new ChainGroup(this);2253    this.balance = new BalanceGroup(this);2254    this.address = new AddressGroup(this);2255    this.collection = new CollectionGroup(this);2256    this.nft = new NFTGroup(this);2257    this.rft = new RFTGroup(this);2258    this.ft = new FTGroup(this);2259    this.staking = new StakingGroup(this);2260  }2261}226222632264export class UniqueBaseCollection {2265  helper: UniqueHelper;2266  collectionId: number;22672268  constructor(collectionId: number, uniqueHelper: UniqueHelper) {2269    this.collectionId = collectionId;2270    this.helper = uniqueHelper;2271  }22722273  async getData() {2274    return await this.helper.collection.getData(this.collectionId);2275  }22762277  async getLastTokenId() {2278    return await this.helper.collection.getLastTokenId(this.collectionId);2279  }22802281  async doesTokenExist(tokenId: number) {2282    return await this.helper.collection.doesTokenExist(this.collectionId, tokenId);2283  }22842285  async getAdmins() {2286    return await this.helper.collection.getAdmins(this.collectionId);2287  }22882289  async getAllowList() {2290    return await this.helper.collection.getAllowList(this.collectionId);2291  }22922293  async getEffectiveLimits() {2294    return await this.helper.collection.getEffectiveLimits(this.collectionId);2295  }22962297  async getProperties(propertyKeys?: string[] | null) {2298    return await this.helper.collection.getProperties(this.collectionId, propertyKeys);2299  }23002301  async getTokenNextSponsored(tokenId: number, addressObj: ICrossAccountId) {2302    return await this.helper.collection.getTokenNextSponsored(this.collectionId, tokenId, addressObj);2303  }23042305  async setSponsor(signer: TSigner, sponsorAddress: TSubstrateAccount) {2306    return await this.helper.collection.setSponsor(signer, this.collectionId, sponsorAddress);2307  }23082309  async confirmSponsorship(signer: TSigner) {2310    return await this.helper.collection.confirmSponsorship(signer, this.collectionId);2311  }23122313  async removeSponsor(signer: TSigner) {2314    return await this.helper.collection.removeSponsor(signer, this.collectionId);2315  }23162317  async setLimits(signer: TSigner, limits: ICollectionLimits) {2318    return await this.helper.collection.setLimits(signer, this.collectionId, limits);2319  }23202321  async changeOwner(signer: TSigner, ownerAddress: TSubstrateAccount) {2322    return await this.helper.collection.changeOwner(signer, this.collectionId, ownerAddress);2323  }23242325  async addAdmin(signer: TSigner, adminAddressObj: ICrossAccountId) {2326    return await this.helper.collection.addAdmin(signer, this.collectionId, adminAddressObj);2327  }23282329  async addToAllowList(signer: TSigner, addressObj: ICrossAccountId) {2330    return await this.helper.collection.addToAllowList(signer, this.collectionId, addressObj);2331  }23322333  async removeFromAllowList(signer: TSigner, addressObj: ICrossAccountId) {2334    return await this.helper.collection.removeFromAllowList(signer, this.collectionId, addressObj);2335  }23362337  async removeAdmin(signer: TSigner, adminAddressObj: ICrossAccountId) {2338    return await this.helper.collection.removeAdmin(signer, this.collectionId, adminAddressObj);2339  }23402341  async setProperties(signer: TSigner, properties: IProperty[]) {2342    return await this.helper.collection.setProperties(signer, this.collectionId, properties);2343  }23442345  async deleteProperties(signer: TSigner, propertyKeys: string[]) {2346    return await this.helper.collection.deleteProperties(signer, this.collectionId, propertyKeys);2347  }23482349  async setPermissions(signer: TSigner, permissions: ICollectionPermissions) {2350    return await this.helper.collection.setPermissions(signer, this.collectionId, permissions);2351  }23522353  async enableNesting(signer: TSigner, permissions: INestingPermissions) {2354    return await this.helper.collection.enableNesting(signer, this.collectionId, permissions);2355  }23562357  async disableNesting(signer: TSigner) {2358    return await this.helper.collection.disableNesting(signer, this.collectionId);2359  }23602361  async burn(signer: TSigner) {2362    return await this.helper.collection.burn(signer, this.collectionId);2363  }2364}236523662367export class UniqueNFTCollection extends UniqueBaseCollection {2368  getTokenObject(tokenId: number) {2369    return new UniqueNFToken(tokenId, this);2370  }23712372  async getTokensByAddress(addressObj: ICrossAccountId) {2373    return await this.helper.nft.getTokensByAddress(this.collectionId, addressObj);2374  }23752376  async getToken(tokenId: number, blockHashAt?: string) {2377    return await this.helper.nft.getToken(this.collectionId, tokenId, [], blockHashAt);2378  }23792380  async getTokenOwner(tokenId: number, blockHashAt?: string) {2381    return await this.helper.nft.getTokenOwner(this.collectionId, tokenId, blockHashAt);2382  }23832384  async getTokenTopmostOwner(tokenId: number, blockHashAt?: string) {2385    return await this.helper.nft.getTokenTopmostOwner(this.collectionId, tokenId, blockHashAt);2386  }23872388  async getTokenChildren(tokenId: number, blockHashAt?: string) {2389    return await this.helper.nft.getTokenChildren(this.collectionId, tokenId, blockHashAt);2390  }23912392  async getPropertyPermissions(propertyKeys: string[] | null = null) {2393    return await this.helper.nft.getPropertyPermissions(this.collectionId, propertyKeys);2394  }23952396  async getTokenProperties(tokenId: number, propertyKeys?: string[] | null) {2397    return await this.helper.nft.getTokenProperties(this.collectionId, tokenId, propertyKeys);2398  }23992400  async transferToken(signer: TSigner, tokenId: number, addressObj: ICrossAccountId) {2401    return await this.helper.nft.transferToken(signer, this.collectionId, tokenId, addressObj);2402  }24032404  async transferTokenFrom(signer: TSigner, tokenId: number, fromAddressObj: ICrossAccountId, toAddressObj: ICrossAccountId) {2405    return await this.helper.nft.transferTokenFrom(signer, this.collectionId, tokenId, fromAddressObj, toAddressObj);2406  }24072408  async approveToken(signer: TSigner, tokenId: number, toAddressObj: ICrossAccountId) {2409    return await this.helper.nft.approveToken(signer, this.collectionId, tokenId, toAddressObj);2410  }24112412  async isTokenApproved(tokenId: number, toAddressObj: ICrossAccountId) {2413    return await this.helper.nft.isTokenApproved(this.collectionId, tokenId, toAddressObj);2414  }24152416  async mintToken(signer: TSigner, owner: ICrossAccountId = {Substrate: signer.address}, properties?: IProperty[]) {2417    return await this.helper.nft.mintToken(signer, {collectionId: this.collectionId, owner, properties});2418  }24192420  async mintMultipleTokens(signer: TSigner, tokens: {owner: ICrossAccountId, properties?: IProperty[]}[]) {2421    return await this.helper.nft.mintMultipleTokens(signer, this.collectionId, tokens);2422  }24232424  async burnToken(signer: TSigner, tokenId: number) {2425    return await this.helper.nft.burnToken(signer, this.collectionId, tokenId);2426  }24272428  async burnTokenFrom(signer: TSigner, tokenId: number, fromAddressObj: ICrossAccountId) {2429    return await this.helper.nft.burnTokenFrom(signer, this.collectionId, tokenId, fromAddressObj);2430  }24312432  async setTokenProperties(signer: TSigner, tokenId: number, properties: IProperty[]) {2433    return await this.helper.nft.setTokenProperties(signer, this.collectionId, tokenId, properties);2434  }24352436  async deleteTokenProperties(signer: TSigner, tokenId: number, propertyKeys: string[]) {2437    return await this.helper.nft.deleteTokenProperties(signer, this.collectionId, tokenId, propertyKeys);2438  }24392440  async setTokenPropertyPermissions(signer: TSigner, permissions: ITokenPropertyPermission[]) {2441    return await this.helper.nft.setTokenPropertyPermissions(signer, this.collectionId, permissions);2442  }24432444  async nestToken(signer: TSigner, tokenId: number, toTokenObj: IToken) {2445    return await this.helper.nft.nestToken(signer, {collectionId: this.collectionId, tokenId}, toTokenObj);2446  }24472448  async unnestToken(signer: TSigner, tokenId: number, fromTokenObj: IToken, toAddressObj: ICrossAccountId) {2449    return await this.helper.nft.unnestToken(signer, {collectionId: this.collectionId, tokenId}, fromTokenObj, toAddressObj);2450  }2451}245224532454export class UniqueRFTCollection extends UniqueBaseCollection {2455  getTokenObject(tokenId: number) {2456    return new UniqueRFToken(tokenId, this);2457  }24582459  async getToken(tokenId: number, blockHashAt?: string) {2460    return await this.helper.rft.getToken(this.collectionId, tokenId, [], blockHashAt);2461  }24622463  async getTokensByAddress(addressObj: ICrossAccountId) {2464    return await this.helper.rft.getTokensByAddress(this.collectionId, addressObj);2465  }24662467  async getTop10TokenOwners(tokenId: number) {2468    return await this.helper.rft.getTokenTop10Owners(this.collectionId, tokenId);2469  }24702471  async getTokenBalance(tokenId: number, addressObj: ICrossAccountId) {2472    return await this.helper.rft.getTokenBalance(this.collectionId, tokenId, addressObj);2473  }24742475  async getTokenTotalPieces(tokenId: number) {2476    return await this.helper.rft.getTokenTotalPieces(this.collectionId, tokenId);2477  }24782479  async getTokenApprovedPieces(tokenId: number, fromAddressObj: ICrossAccountId, toAddressObj: ICrossAccountId) {2480    return await this.helper.rft.getTokenApprovedPieces(this.collectionId, tokenId, toAddressObj, fromAddressObj);2481  }24822483  async getPropertyPermissions(propertyKeys: string[] | null = null) {2484    return await this.helper.rft.getPropertyPermissions(this.collectionId, propertyKeys);2485  }24862487  async getTokenProperties(tokenId: number, propertyKeys?: string[] | null) {2488    return await this.helper.rft.getTokenProperties(this.collectionId, tokenId, propertyKeys);2489  }24902491  async transferToken(signer: TSigner, tokenId: number, addressObj: ICrossAccountId, amount=1n) {2492    return await this.helper.rft.transferToken(signer, this.collectionId, tokenId, addressObj, amount);2493  }24942495  async transferTokenFrom(signer: TSigner, tokenId: number, fromAddressObj: ICrossAccountId, toAddressObj: ICrossAccountId, amount=1n) {2496    return await this.helper.rft.transferTokenFrom(signer, this.collectionId, tokenId, fromAddressObj, toAddressObj, amount);2497  }24982499  async approveToken(signer: TSigner, tokenId: number, toAddressObj: ICrossAccountId, amount=1n) {2500    return await this.helper.rft.approveToken(signer, this.collectionId, tokenId, toAddressObj, amount);2501  }25022503  async repartitionToken(signer: TSigner, tokenId: number, amount: bigint) {2504    return await this.helper.rft.repartitionToken(signer, this.collectionId, tokenId, amount);2505  }25062507  async mintToken(signer: TSigner, pieces=1n, owner: ICrossAccountId = {Substrate: signer.address}, properties?: IProperty[]) {2508    return await this.helper.rft.mintToken(signer, {collectionId: this.collectionId, owner, pieces, properties});2509  }25102511  async mintMultipleTokens(signer: TSigner, tokens: {pieces: bigint, owner: ICrossAccountId, properties?: IProperty[]}[]) {2512    return await this.helper.rft.mintMultipleTokens(signer, this.collectionId, tokens);2513  }25142515  async burnToken(signer: TSigner, tokenId: number, amount=1n) {2516    return await this.helper.rft.burnToken(signer, this.collectionId, tokenId, amount);2517  }25182519  async burnTokenFrom(signer: TSigner, tokenId: number, fromAddressObj: ICrossAccountId,  amount=1n) {2520    return await this.helper.rft.burnTokenFrom(signer, this.collectionId, tokenId, fromAddressObj, amount);2521  }25222523  async setTokenProperties(signer: TSigner, tokenId: number, properties: IProperty[]) {2524    return await this.helper.rft.setTokenProperties(signer, this.collectionId, tokenId, properties);2525  }25262527  async deleteTokenProperties(signer: TSigner, tokenId: number, propertyKeys: string[]) {2528    return await this.helper.rft.deleteTokenProperties(signer, this.collectionId, tokenId, propertyKeys);2529  }25302531  async setTokenPropertyPermissions(signer: TSigner, permissions: ITokenPropertyPermission[]) {2532    return await this.helper.rft.setTokenPropertyPermissions(signer, this.collectionId, permissions);2533  }2534}253525362537export class UniqueFTCollection extends UniqueBaseCollection {2538  async getBalance(addressObj: ICrossAccountId) {2539    return await this.helper.ft.getBalance(this.collectionId, addressObj);2540  }25412542  async getTotalPieces() {2543    return await this.helper.ft.getTotalPieces(this.collectionId);2544  }25452546  async getApprovedTokens(fromAddressObj: ICrossAccountId, toAddressObj: ICrossAccountId) {2547    return await this.helper.ft.getApprovedTokens(this.collectionId, fromAddressObj, toAddressObj);2548  }25492550  async getTop10Owners() {2551    return await this.helper.ft.getTop10Owners(this.collectionId);2552  }25532554  async mint(signer: TSigner, amount=1n, owner: ICrossAccountId = {Substrate: signer.address}) {2555    return await this.helper.ft.mintTokens(signer, this.collectionId, amount, owner);2556  }25572558  async mintWithOneOwner(signer: TSigner, tokens: {value: bigint}[], owner: ICrossAccountId = {Substrate: signer.address}) {2559    return await this.helper.ft.mintMultipleTokensWithOneOwner(signer, this.collectionId, tokens, owner);2560  }25612562  async transfer(signer: TSigner, toAddressObj: ICrossAccountId, amount=1n) {2563    return await this.helper.ft.transfer(signer, this.collectionId, toAddressObj, amount);2564  }25652566  async transferFrom(signer: TSigner, fromAddressObj: ICrossAccountId, toAddressObj: ICrossAccountId, amount=1n) {2567    return await this.helper.ft.transferFrom(signer, this.collectionId, fromAddressObj, toAddressObj, amount);2568  }25692570  async burnTokens(signer: TSigner, amount=1n) {2571    return await this.helper.ft.burnTokens(signer, this.collectionId, amount);2572  }25732574  async burnTokensFrom(signer: TSigner, fromAddressObj: ICrossAccountId, amount=1n) {2575    return await this.helper.ft.burnTokensFrom(signer, this.collectionId, fromAddressObj, amount);2576  }25772578  async approveTokens(signer: TSigner, toAddressObj: ICrossAccountId, amount=1n) {2579    return await this.helper.ft.approveTokens(signer, this.collectionId, toAddressObj, amount);2580  }2581}258225832584export class UniqueBaseToken {2585  collection: UniqueNFTCollection | UniqueRFTCollection;2586  collectionId: number;2587  tokenId: number;25882589  constructor(tokenId: number, collection: UniqueNFTCollection | UniqueRFTCollection) {2590    this.collection = collection;2591    this.collectionId = collection.collectionId;2592    this.tokenId = tokenId;2593  }25942595  async getNextSponsored(addressObj: ICrossAccountId) {2596    return await this.collection.getTokenNextSponsored(this.tokenId, addressObj);2597  }25982599  async getProperties(propertyKeys?: string[] | null) {2600    return await this.collection.getTokenProperties(this.tokenId, propertyKeys);2601  }26022603  async setProperties(signer: TSigner, properties: IProperty[]) {2604    return await this.collection.setTokenProperties(signer, this.tokenId, properties);2605  }26062607  async deleteProperties(signer: TSigner, propertyKeys: string[]) {2608    return await this.collection.deleteTokenProperties(signer, this.tokenId, propertyKeys);2609  }26102611  async doesExist() {2612    return await this.collection.doesTokenExist(this.tokenId);2613  }26142615  nestingAccount() {2616    return this.collection.helper.util.getTokenAccount(this);2617  }2618}261926202621export class UniqueNFToken extends UniqueBaseToken {2622  collection: UniqueNFTCollection;26232624  constructor(tokenId: number, collection: UniqueNFTCollection) {2625    super(tokenId, collection);2626    this.collection = collection;2627  }26282629  async getData(blockHashAt?: string) {2630    return await this.collection.getToken(this.tokenId, blockHashAt);2631  }26322633  async getOwner(blockHashAt?: string) {2634    return await this.collection.getTokenOwner(this.tokenId, blockHashAt);2635  }26362637  async getTopmostOwner(blockHashAt?: string) {2638    return await this.collection.getTokenTopmostOwner(this.tokenId, blockHashAt);2639  }26402641  async getChildren(blockHashAt?: string) {2642    return await this.collection.getTokenChildren(this.tokenId, blockHashAt);2643  }26442645  async nest(signer: TSigner, toTokenObj: IToken) {2646    return await this.collection.nestToken(signer, this.tokenId, toTokenObj);2647  }26482649  async unnest(signer: TSigner, fromTokenObj: IToken, toAddressObj: ICrossAccountId) {2650    return await this.collection.unnestToken(signer, this.tokenId, fromTokenObj, toAddressObj);2651  }26522653  async transfer(signer: TSigner, addressObj: ICrossAccountId) {2654    return await this.collection.transferToken(signer, this.tokenId, addressObj);2655  }26562657  async transferFrom(signer: TSigner, fromAddressObj: ICrossAccountId, toAddressObj: ICrossAccountId) {2658    return await this.collection.transferTokenFrom(signer, this.tokenId, fromAddressObj, toAddressObj);2659  }26602661  async approve(signer: TSigner, toAddressObj: ICrossAccountId) {2662    return await this.collection.approveToken(signer, this.tokenId, toAddressObj);2663  }26642665  async isApproved(toAddressObj: ICrossAccountId) {2666    return await this.collection.isTokenApproved(this.tokenId, toAddressObj);2667  }26682669  async burn(signer: TSigner) {2670    return await this.collection.burnToken(signer, this.tokenId);2671  }26722673  async burnFrom(signer: TSigner, fromAddressObj: ICrossAccountId) {2674    return await this.collection.burnTokenFrom(signer, this.tokenId, fromAddressObj);2675  }2676}26772678export class UniqueRFToken extends UniqueBaseToken {2679  collection: UniqueRFTCollection;26802681  constructor(tokenId: number, collection: UniqueRFTCollection) {2682    super(tokenId, collection);2683    this.collection = collection;2684  }26852686  async getData(blockHashAt?: string) {2687    return await this.collection.getToken(this.tokenId, blockHashAt);2688  }26892690  async getTop10Owners() {2691    return await this.collection.getTop10TokenOwners(this.tokenId);2692  }26932694  async getBalance(addressObj: ICrossAccountId) {2695    return await this.collection.getTokenBalance(this.tokenId, addressObj);2696  }26972698  async getTotalPieces() {2699    return await this.collection.getTokenTotalPieces(this.tokenId);2700  }27012702  async getApprovedPieces(fromAddressObj: ICrossAccountId, toAccountObj: ICrossAccountId) {2703    return await this.collection.getTokenApprovedPieces(this.tokenId, fromAddressObj, toAccountObj);2704  }27052706  async transfer(signer: TSigner, addressObj: ICrossAccountId, amount=1n) {2707    return await this.collection.transferToken(signer, this.tokenId, addressObj, amount);2708  }27092710  async transferFrom(signer: TSigner, fromAddressObj: ICrossAccountId, toAddressObj: ICrossAccountId, amount=1n) {2711    return await this.collection.transferTokenFrom(signer, this.tokenId, fromAddressObj, toAddressObj, amount);2712  }27132714  async approve(signer: TSigner, toAddressObj: ICrossAccountId, amount=1n) {2715    return await this.collection.approveToken(signer, this.tokenId, toAddressObj, amount);2716  }27172718  async repartition(signer: TSigner, amount: bigint) {2719    return await this.collection.repartitionToken(signer, this.tokenId, amount);2720  }27212722  async burn(signer: TSigner, amount=1n) {2723    return await this.collection.burnToken(signer, this.tokenId, amount);2724  }27252726  async burnFrom(signer: TSigner, fromAddressObj: ICrossAccountId, amount=1n) {2727    return await this.collection.burnTokenFrom(signer, this.tokenId, fromAddressObj, amount);2728  }2729}
deletedtests/src/util/util.tsdiffbeforeafterboth
--- a/tests/src/util/util.ts
+++ /dev/null
@@ -1,46 +0,0 @@
-// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.
-// This file is part of Unique Network.
-
-// Unique Network is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Unique Network is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
-
-export function strToUTF16(str: string): any {
-  const buf: number[] = [];
-  for (let i=0, strLen=str.length; i < strLen; i++) {
-    buf.push(str.charCodeAt(i));
-  }
-  return buf;
-}
-
-export function utf16ToStr(buf: number[]): string {
-  let str = '';
-  for (let i=0, strLen=buf.length; i < strLen; i++) {
-    if (buf[i] != 0) str += String.fromCharCode(buf[i]);
-    else break;
-  }
-  return str;
-}
-
-export function hexToStr(buf: string): string {
-  let str = '';
-  let hexStart = buf.indexOf('0x');
-  if (hexStart < 0) hexStart = 0;
-  else hexStart = 2;  
-  for (let i=hexStart, strLen=buf.length; i < strLen; i+=2) {
-    const ch = buf[i] + buf[i+1];
-    const num = parseInt(ch, 16);
-    if (num != 0) str += String.fromCharCode(num);
-    else break;
-  }
-  return str;
-}
modifiedtests/src/xcm/xcmOpal.test.tsdiffbeforeafterboth
--- a/tests/src/xcm/xcmOpal.test.ts
+++ b/tests/src/xcm/xcmOpal.test.ts
@@ -21,9 +21,8 @@
 import {ApiOptions} from '@polkadot/api/types';
 import {IKeyringPair} from '@polkadot/types/types';
 import usingApi, {executeTransaction} from './../substrate/substrate-api';
-import {bigIntToDecimals, describe_xcm, getGenericResult, paraSiblingSovereignAccount} from './../util/helpers';
+import {bigIntToDecimals, describe_xcm, getGenericResult, paraSiblingSovereignAccount, normalizeAccountId} from './../deprecated-helpers/helpers';
 import waitNewBlocks from './../substrate/wait-new-blocks';
-import {normalizeAccountId} from './../util/helpers';
 import getBalance from './../substrate/get-balance';
 
 
modifiedtests/src/xcm/xcmQuartz.test.tsdiffbeforeafterboth
--- a/tests/src/xcm/xcmQuartz.test.ts
+++ b/tests/src/xcm/xcmQuartz.test.ts
@@ -21,7 +21,7 @@
 import {ApiOptions} from '@polkadot/api/types';
 import {IKeyringPair} from '@polkadot/types/types';
 import usingApi, {submitTransactionAsync} from '../substrate/substrate-api';
-import {getGenericResult, generateKeyringPair, waitEvent, describe_xcm, bigIntToDecimals} from '../util/helpers';
+import {getGenericResult, generateKeyringPair, waitEvent, describe_xcm, bigIntToDecimals} from '../deprecated-helpers/helpers';
 import {MultiLocation} from '@polkadot/types/interfaces';
 import {blake2AsHex} from '@polkadot/util-crypto';
 import waitNewBlocks from '../substrate/wait-new-blocks';
modifiedtests/src/xcm/xcmUnique.test.tsdiffbeforeafterboth
--- a/tests/src/xcm/xcmUnique.test.ts
+++ b/tests/src/xcm/xcmUnique.test.ts
@@ -21,7 +21,7 @@
 import {ApiOptions} from '@polkadot/api/types';
 import {IKeyringPair} from '@polkadot/types/types';
 import usingApi, {submitTransactionAsync} from '../substrate/substrate-api';
-import {getGenericResult, generateKeyringPair, waitEvent, describe_xcm, bigIntToDecimals} from '../util/helpers';
+import {getGenericResult, generateKeyringPair, waitEvent, describe_xcm, bigIntToDecimals} from '../deprecated-helpers/helpers';
 import {MultiLocation} from '@polkadot/types/interfaces';
 import {blake2AsHex} from '@polkadot/util-crypto';
 import waitNewBlocks from '../substrate/wait-new-blocks';