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outdated/addToContractAllowList.test.tsdiffbeforeafterboth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outdated/addToContractAllowList.test.ts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outdated/addToContractAllowList.test.ts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outdated/contracts.test.tsdiffbeforeafterboth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outdated/contracts.test.ts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outdated/contracts.test.ts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outdated/enableContractSponsoring.test.tsdiffbeforeafterboth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outdated/enableContractSponsoring.test.ts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outdated/enableContractSponsoring.test.ts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
after · tests/src/deprecated-helpers/helpers.ts
1// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.2// This file is part of Unique Network.34// Unique Network is free software: you can redistribute it and/or modify5// it under the terms of the GNU General Public License as published by6// the Free Software Foundation, either version 3 of the License, or7// (at your option) any later version.89// Unique Network is distributed in the hope that it will be useful,10// but WITHOUT ANY WARRANTY; without even the implied warranty of11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the12// GNU General Public License for more details.1314// You should have received a copy of the GNU General Public License15// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.1617import '../interfaces/augment-api-rpc';18import '../interfaces/augment-api-query';19import {ApiPromise, Keyring} from '@polkadot/api';20import type {AccountId, EventRecord, Event, BlockNumber} from '@polkadot/types/interfaces';21import type {GenericEventData} from '@polkadot/types';22import {AnyTuple, IEvent, IKeyringPair} from '@polkadot/types/types';23import {evmToAddress} from '@polkadot/util-crypto';24import {AnyNumber} from '@polkadot/types-codec/types';25import BN from 'bn.js';26import chai from 'chai';27import chaiAsPromised from 'chai-as-promised';28import {default as usingApi, executeTransaction, submitTransactionAsync, submitTransactionExpectFailAsync} from '../substrate/substrate-api';29import {hexToStr, strToUTF16, utf16ToStr} from './util';30import {UpDataStructsRpcCollection, UpDataStructsCreateItemData, UpDataStructsProperty} from '@polkadot/types/lookup';31import {UpDataStructsTokenChild} from '../interfaces';32import {Context} from 'mocha';3334chai.use(chaiAsPromised);35const expect = chai.expect;3637export type CrossAccountId = {38  Substrate: string,39} | {40  Ethereum: string,41};424344export enum Pallets {45  Inflation = 'inflation',46  RmrkCore = 'rmrkcore',47  RmrkEquip = 'rmrkequip',48  ReFungible = 'refungible',49  Fungible = 'fungible',50  NFT = 'nonfungible',51  Scheduler = 'scheduler',52  AppPromotion = 'apppromotion',53}5455export async function isUnique(): Promise<boolean> {56  return usingApi(async api => {57    const chain = await api.rpc.system.chain();5859    return chain.eq('UNIQUE');60  });61}6263export async function isQuartz(): Promise<boolean> {64  return usingApi(async api => {65    const chain = await api.rpc.system.chain();6667    return chain.eq('QUARTZ');68  });69}7071let modulesNames: any;72export function getModuleNames(api: ApiPromise): string[] {73  if (typeof modulesNames === 'undefined')74    modulesNames = api.runtimeMetadata.asLatest.pallets.map(m => m.name.toString().toLowerCase());75  return modulesNames;76}7778export async function missingRequiredPallets(requiredPallets: string[]): Promise<string[]> {79  return await usingApi(async api => {80    const pallets = getModuleNames(api);8182    return requiredPallets.filter(p => !pallets.includes(p));83  });84}8586export async function checkPalletsPresence(requiredPallets: string[]): Promise<boolean> {87  return (await missingRequiredPallets(requiredPallets)).length == 0;88}8990export async function requirePallets(mocha: Context, requiredPallets: string[]) {91  const missingPallets = await missingRequiredPallets(requiredPallets);9293  if (missingPallets.length > 0) {94    const skippingTestMsg = `\tSkipping test "${mocha.test?.title}".`;95    const missingPalletsMsg = `\tThe following pallets are missing:\n\t- ${missingPallets.join('\n\t- ')}`;96    const skipMsg = `${skippingTestMsg}\n${missingPalletsMsg}`;9798    console.error('\x1b[38:5:208m%s\x1b[0m', skipMsg);99100    mocha.skip();101  }102}103104export function bigIntToSub(api: ApiPromise, number: bigint) {105  return api.registry.createType('AccountId', '0x' + number.toString(16).padStart(64, '0')).toJSON();106}107108export function bigIntToDecimals(number: bigint, decimals = 18): string {109  const numberStr = number.toString();110  const dotPos = numberStr.length - decimals;111112  if (dotPos <= 0) {113    return '0.' + '0'.repeat(Math.abs(dotPos)) + numberStr;114  } else {115    const intPart = numberStr.substring(0, dotPos);116    const fractPart = numberStr.substring(dotPos);117    return intPart + '.' + fractPart;118  }119}120121export function normalizeAccountId(input: string | AccountId | CrossAccountId | IKeyringPair): CrossAccountId {122  if (typeof input === 'string') {123    if (input.length >= 47) {124      return {Substrate: input};125    } else if (input.length === 42 && input.startsWith('0x')) {126      return {Ethereum: input.toLowerCase()};127    } else if (input.length === 40 && !input.startsWith('0x')) {128      return {Ethereum: '0x' + input.toLowerCase()};129    } else {130      throw new Error(`Unknown address format: "${input}"`);131    }132  }133  if ('address' in input) {134    return {Substrate: input.address};135  }136  if ('Ethereum' in input) {137    return {138      Ethereum: input.Ethereum.toLowerCase(),139    };140  } else if ('ethereum' in input) {141    return {142      Ethereum: (input as any).ethereum.toLowerCase(),143    };144  } else if ('Substrate' in input) {145    return input;146  } else if ('substrate' in input) {147    return {148      Substrate: (input as any).substrate,149    };150  }151152  // AccountId153  return {Substrate: input.toString()};154}155export function toSubstrateAddress(input: string | CrossAccountId | IKeyringPair): string {156  input = normalizeAccountId(input);157  if ('Substrate' in input) {158    return input.Substrate;159  } else {160    return evmToAddress(input.Ethereum);161  }162}163164export const U128_MAX = (1n << 128n) - 1n;165166const MICROUNIQUE = 1_000_000_000_000n;167const MILLIUNIQUE = 1_000n * MICROUNIQUE;168const CENTIUNIQUE = 10n * MILLIUNIQUE;169export const UNIQUE = 100n * CENTIUNIQUE;170171interface GenericResult<T> {172  success: boolean;173  data: T | null;174}175176interface CreateCollectionResult {177  success: boolean;178  collectionId: number;179}180181interface CreateItemResult {182  success: boolean;183  collectionId: number;184  itemId: number;185  recipient?: CrossAccountId;186  amount?: number;187}188189interface DestroyItemResult {190  success: boolean;191  collectionId: number;192  itemId: number;193  owner: CrossAccountId;194  amount: number;195}196197interface TransferResult {198  collectionId: number;199  itemId: number;200  sender?: CrossAccountId;201  recipient?: CrossAccountId;202  value: bigint;203}204205interface IReFungibleOwner {206  fraction: BN;207  owner: number[];208}209210interface IGetMessage {211  checkMsgUnqMethod: string;212  checkMsgTrsMethod: string;213  checkMsgSysMethod: string;214}215216export interface IFungibleTokenDataType {217  value: number;218}219220export interface IChainLimits {221  collectionNumbersLimit: number;222  accountTokenOwnershipLimit: number;223  collectionsAdminsLimit: number;224  customDataLimit: number;225  nftSponsorTransferTimeout: number;226  fungibleSponsorTransferTimeout: number;227  refungibleSponsorTransferTimeout: number;228  //offchainSchemaLimit: number;229  //constOnChainSchemaLimit: number;230}231232export interface IReFungibleTokenDataType {233  owner: IReFungibleOwner[];234}235236export function uniqueEventMessage(events: EventRecord[]): IGetMessage {237  let checkMsgUnqMethod = '';238  let checkMsgTrsMethod = '';239  let checkMsgSysMethod = '';240  events.forEach(({event: {method, section}}) => {241    if (section === 'common') {242      checkMsgUnqMethod = method;243    } else if (section === 'treasury') {244      checkMsgTrsMethod = method;245    } else if (section === 'system') {246      checkMsgSysMethod = method;247    } else { return null; }248  });249  const result: IGetMessage = {250    checkMsgUnqMethod,251    checkMsgTrsMethod,252    checkMsgSysMethod,253  };254  return result;255}256257export function getEvent<T extends Event>(events: EventRecord[], check: (event: IEvent<AnyTuple>) => event is T): T | undefined {258  const event = events.find(r => check(r.event));259  if (!event) return;260  return event.event as T;261}262263export function getGenericResult<T>(events: EventRecord[]): GenericResult<T>;264export function getGenericResult<T>(265  events: EventRecord[],266  expectSection: string,267  expectMethod: string,268  extractAction: (data: GenericEventData) => T269): GenericResult<T>;270271export function getGenericResult<T>(272  events: EventRecord[],273  expectSection?: string,274  expectMethod?: string,275  extractAction?: (data: GenericEventData) => T,276): GenericResult<T> {277  let success = false;278  let successData = null;279280  events.forEach(({event: {data, method, section}}) => {281    // console.log(`    ${phase}: ${section}.${method}:: ${data}`);282    if (method === 'ExtrinsicSuccess') {283      success = true;284    } else if ((expectSection == section) && (expectMethod == method)) {285      successData = extractAction!(data as any);286    }287  });288289  const result: GenericResult<T> = {290    success,291    data: successData,292  };293  return result;294}295296export function getCreateCollectionResult(events: EventRecord[]): CreateCollectionResult {297  const genericResult = getGenericResult(events, 'common', 'CollectionCreated', (data) => parseInt(data[0].toString(), 10));298  const result: CreateCollectionResult = {299    success: genericResult.success,300    collectionId: genericResult.data ?? 0,301  };302  return result;303}304305export function getCreateItemsResult(events: EventRecord[]): CreateItemResult[] {306  const results: CreateItemResult[] = [];307308  const genericResult = getGenericResult<CreateItemResult[]>(events, 'common', 'ItemCreated', (data) => {309    const collectionId = parseInt(data[0].toString(), 10);310    const itemId = parseInt(data[1].toString(), 10);311    const recipient = normalizeAccountId(data[2].toJSON() as any);312    const amount = parseInt(data[3].toString(), 10);313314    const itemRes: CreateItemResult = {315      success: true,316      collectionId,317      itemId,318      recipient,319      amount,320    };321322    results.push(itemRes);323    return results;324  });325326  if (!genericResult.success) return [];327  return results;328}329330export function getCreateItemResult(events: EventRecord[]): CreateItemResult {331  const genericResult = getGenericResult(events, 'common', 'ItemCreated', (data) => data.map(function(value) { return value.toJSON(); }));332333  if (genericResult.data == null)334    return {335      success: genericResult.success,336      collectionId: 0,337      itemId: 0,338      amount: 0,339    };340  else341    return {342      success: genericResult.success,343      collectionId: genericResult.data[0] as number,344      itemId: genericResult.data[1] as number,345      recipient: normalizeAccountId(genericResult.data![2] as any),346      amount: genericResult.data[3] as number,347    };348}349350export function getDestroyItemsResult(events: EventRecord[]): DestroyItemResult[] {351  const results: DestroyItemResult[] = [];352353  const genericResult = getGenericResult<DestroyItemResult[]>(events, 'common', 'ItemDestroyed', (data) => {354    const collectionId = parseInt(data[0].toString(), 10);355    const itemId = parseInt(data[1].toString(), 10);356    const owner = normalizeAccountId(data[2].toJSON() as any);357    const amount = parseInt(data[3].toString(), 10);358359    const itemRes: DestroyItemResult = {360      success: true,361      collectionId,362      itemId,363      owner,364      amount,365    };366367    results.push(itemRes);368    return results;369  });370371  if (!genericResult.success) return [];372  return results;373}374375export function getTransferResult(api: ApiPromise, events: EventRecord[]): TransferResult {376  for (const {event} of events) {377    if (api.events.common.Transfer.is(event)) {378      const [collection, token, sender, recipient, value] = event.data;379      return {380        collectionId: collection.toNumber(),381        itemId: token.toNumber(),382        sender: normalizeAccountId(sender.toJSON() as any),383        recipient: normalizeAccountId(recipient.toJSON() as any),384        value: value.toBigInt(),385      };386    }387  }388  throw new Error('no transfer event');389}390391interface Nft {392  type: 'NFT';393}394395interface Fungible {396  type: 'Fungible';397  decimalPoints: number;398}399400interface ReFungible {401  type: 'ReFungible';402}403404export type CollectionMode = Nft | Fungible | ReFungible;405406export type Property = {407  key: any,408  value: any,409};410411type Permission = {412  mutable: boolean;413  collectionAdmin: boolean;414  tokenOwner: boolean;415}416417type PropertyPermission = {418  key: any;419  permission: Permission;420}421422export type CreateCollectionParams = {423  mode: CollectionMode,424  name: string,425  description: string,426  tokenPrefix: string,427  properties?: Array<Property>,428  propPerm?: Array<PropertyPermission>429};430431const defaultCreateCollectionParams: CreateCollectionParams = {432  description: 'description',433  mode: {type: 'NFT'},434  name: 'name',435  tokenPrefix: 'prefix',436};437438export async function439createCollection(440  api: ApiPromise,441  sender: IKeyringPair,442  params: Partial<CreateCollectionParams> = {},443): Promise<CreateCollectionResult> {444  const {name, description, mode, tokenPrefix} = {...defaultCreateCollectionParams, ...params};445446  let modeprm = {};447  if (mode.type === 'NFT') {448    modeprm = {nft: null};449  } else if (mode.type === 'Fungible') {450    modeprm = {fungible: mode.decimalPoints};451  } else if (mode.type === 'ReFungible') {452    modeprm = {refungible: null};453  }454455  const tx = api.tx.unique.createCollectionEx({456    name: strToUTF16(name),457    description: strToUTF16(description),458    tokenPrefix: strToUTF16(tokenPrefix),459    mode: modeprm as any,460  });461  const events = await executeTransaction(api, sender, tx);462  return getCreateCollectionResult(events);463}464465export async function createCollectionExpectSuccess(params: Partial<CreateCollectionParams> = {}): Promise<number> {466  const {name, description, mode, tokenPrefix} = {...defaultCreateCollectionParams, ...params};467468  let collectionId = 0;469  await usingApi(async (api, privateKeyWrapper) => {470    // Get number of collections before the transaction471    const collectionCountBefore = await getCreatedCollectionCount(api);472473    // Run the CreateCollection transaction474    const alicePrivateKey = privateKeyWrapper('//Alice');475476    const result = await createCollection(api, alicePrivateKey, params);477478    // Get number of collections after the transaction479    const collectionCountAfter = await getCreatedCollectionCount(api);480481    // Get the collection482    const collection = await queryCollectionExpectSuccess(api, result.collectionId);483484    // What to expect485    // tslint:disable-next-line:no-unused-expression486    expect(result.success).to.be.true;487    expect(result.collectionId).to.be.equal(collectionCountAfter);488    // tslint:disable-next-line:no-unused-expression489    expect(collection).to.be.not.null;490    expect(collectionCountAfter).to.be.equal(collectionCountBefore + 1, 'Error: NFT collection NOT created.');491    expect(collection.owner.toString()).to.be.equal(toSubstrateAddress(alicePrivateKey));492    expect(utf16ToStr(collection.name.toJSON() as any)).to.be.equal(name);493    expect(utf16ToStr(collection.description.toJSON() as any)).to.be.equal(description);494    expect(hexToStr(collection.tokenPrefix.toJSON())).to.be.equal(tokenPrefix);495496    collectionId = result.collectionId;497  });498499  return collectionId;500}501502export async function createCollectionWithPropsExpectSuccess(params: Partial<CreateCollectionParams> = {}): Promise<number> {503  const {name, description, mode, tokenPrefix} = {...defaultCreateCollectionParams, ...params};504505  let collectionId = 0;506  await usingApi(async (api, privateKeyWrapper) => {507    // Get number of collections before the transaction508    const collectionCountBefore = await getCreatedCollectionCount(api);509510    // Run the CreateCollection transaction511    const alicePrivateKey = privateKeyWrapper('//Alice');512513    let modeprm = {};514    if (mode.type === 'NFT') {515      modeprm = {nft: null};516    } else if (mode.type === 'Fungible') {517      modeprm = {fungible: mode.decimalPoints};518    } else if (mode.type === 'ReFungible') {519      modeprm = {refungible: null};520    }521522    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});523    const events = await submitTransactionAsync(alicePrivateKey, tx);524    const result = getCreateCollectionResult(events);525526    // Get number of collections after the transaction527    const collectionCountAfter = await getCreatedCollectionCount(api);528529    // Get the collection530    const collection = await queryCollectionExpectSuccess(api, result.collectionId);531532    // What to expect533    // tslint:disable-next-line:no-unused-expression534    expect(result.success).to.be.true;535    expect(result.collectionId).to.be.equal(collectionCountAfter);536    // tslint:disable-next-line:no-unused-expression537    expect(collection).to.be.not.null;538    expect(collectionCountAfter).to.be.equal(collectionCountBefore + 1, 'Error: NFT collection NOT created.');539    expect(collection.owner.toString()).to.be.equal(toSubstrateAddress(alicePrivateKey));540    expect(utf16ToStr(collection.name.toJSON() as any)).to.be.equal(name);541    expect(utf16ToStr(collection.description.toJSON() as any)).to.be.equal(description);542    expect(hexToStr(collection.tokenPrefix.toJSON())).to.be.equal(tokenPrefix);543544545    collectionId = result.collectionId;546  });547548  return collectionId;549}550551export async function createCollectionWithPropsExpectFailure(params: Partial<CreateCollectionParams> = {}) {552  const {name, description, mode, tokenPrefix} = {...defaultCreateCollectionParams, ...params};553554  await usingApi(async (api, privateKeyWrapper) => {555    // Get number of collections before the transaction556    const collectionCountBefore = await getCreatedCollectionCount(api);557558    // Run the CreateCollection transaction559    const alicePrivateKey = privateKeyWrapper('//Alice');560561    let modeprm = {};562    if (mode.type === 'NFT') {563      modeprm = {nft: null};564    } else if (mode.type === 'Fungible') {565      modeprm = {fungible: mode.decimalPoints};566    } else if (mode.type === 'ReFungible') {567      modeprm = {refungible: null};568    }569570    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});571    await expect(submitTransactionExpectFailAsync(alicePrivateKey, tx)).to.be.rejected;572573574    // Get number of collections after the transaction575    const collectionCountAfter = await getCreatedCollectionCount(api);576577    expect(collectionCountAfter).to.be.equal(collectionCountBefore, 'Error: Collection with incorrect data created.');578  });579}580581export async function createCollectionExpectFailure(params: Partial<CreateCollectionParams> = {}) {582  const {name, description, mode, tokenPrefix} = {...defaultCreateCollectionParams, ...params};583584  let modeprm = {};585  if (mode.type === 'NFT') {586    modeprm = {nft: null};587  } else if (mode.type === 'Fungible') {588    modeprm = {fungible: mode.decimalPoints};589  } else if (mode.type === 'ReFungible') {590    modeprm = {refungible: null};591  }592593  await usingApi(async (api, privateKeyWrapper) => {594    // Get number of collections before the transaction595    const collectionCountBefore = await getCreatedCollectionCount(api);596597    // Run the CreateCollection transaction598    const alicePrivateKey = privateKeyWrapper('//Alice');599    const tx = api.tx.unique.createCollectionEx({name: strToUTF16(name), description: strToUTF16(description), tokenPrefix: strToUTF16(tokenPrefix), mode: modeprm as any});600    await expect(submitTransactionExpectFailAsync(alicePrivateKey, tx)).to.be.rejected;601602    // Get number of collections after the transaction603    const collectionCountAfter = await getCreatedCollectionCount(api);604605    // What to expect606    expect(collectionCountAfter).to.be.equal(collectionCountBefore, 'Error: Collection with incorrect data created.');607  });608}609610export async function findUnusedAddress(api: ApiPromise, privateKeyWrapper: (account: string) => IKeyringPair, seedAddition = ''): Promise<IKeyringPair> {611  let bal = 0n;612  let unused;613  do {614    const randomSeed = 'seed' + Math.floor(Math.random() * Math.floor(10000)) + seedAddition;615    unused = privateKeyWrapper(`//${randomSeed}`);616    bal = (await api.query.system.account(unused.address)).data.free.toBigInt();617  } while (bal !== 0n);618  return unused;619}620621export async function getAllowance(api: ApiPromise, collectionId: number, owner: CrossAccountId | string | IKeyringPair, approved: CrossAccountId | string | IKeyringPair, tokenId: number) {622  return (await api.rpc.unique.allowance(collectionId, normalizeAccountId(owner), normalizeAccountId(approved), tokenId)).toBigInt();623}624625export function findUnusedAddresses(api: ApiPromise, privateKeyWrapper: (account: string) => IKeyringPair, amount: number): Promise<IKeyringPair[]> {626  return Promise.all(new Array(amount).fill(null).map(() => findUnusedAddress(api, privateKeyWrapper, '_' + Date.now())));627}628629export async function findNotExistingCollection(api: ApiPromise): Promise<number> {630  const totalNumber = await getCreatedCollectionCount(api);631  const newCollection: number = totalNumber + 1;632  return newCollection;633}634635function getDestroyResult(events: EventRecord[]): boolean {636  let success = false;637  events.forEach(({event: {method}}) => {638    if (method == 'ExtrinsicSuccess') {639      success = true;640    }641  });642  return success;643}644645export async function destroyCollectionExpectFailure(collectionId: number, senderSeed = '//Alice') {646  await usingApi(async (api, privateKeyWrapper) => {647    // Run the DestroyCollection transaction648    const alicePrivateKey = privateKeyWrapper(senderSeed);649    const tx = api.tx.unique.destroyCollection(collectionId);650    await expect(submitTransactionExpectFailAsync(alicePrivateKey, tx)).to.be.rejected;651  });652}653654export async function destroyCollectionExpectSuccess(collectionId: number, senderSeed = '//Alice') {655  await usingApi(async (api, privateKeyWrapper) => {656    // Run the DestroyCollection transaction657    const alicePrivateKey = privateKeyWrapper(senderSeed);658    const tx = api.tx.unique.destroyCollection(collectionId);659    const events = await submitTransactionAsync(alicePrivateKey, tx);660    const result = getDestroyResult(events);661    expect(result).to.be.true;662663    // What to expect664    expect(await getDetailedCollectionInfo(api, collectionId)).to.be.null;665  });666}667668export async function setCollectionLimitsExpectSuccess(sender: IKeyringPair, collectionId: number, limits: any) {669  await usingApi(async (api) => {670    const tx = api.tx.unique.setCollectionLimits(collectionId, limits);671    const events = await submitTransactionAsync(sender, tx);672    const result = getGenericResult(events);673674    expect(result.success).to.be.true;675  });676}677678export const setCollectionPermissionsExpectSuccess = async (sender: IKeyringPair, collectionId: number, permissions: any) => {679  await usingApi(async(api) => {680    const tx = api.tx.unique.setCollectionPermissions(collectionId, permissions);681    const events = await submitTransactionAsync(sender, tx);682    const result = getGenericResult(events);683684    expect(result.success).to.be.true;685  });686};687688export async function setCollectionLimitsExpectFailure(sender: IKeyringPair, collectionId: number, limits: any) {689  await usingApi(async (api) => {690    const tx = api.tx.unique.setCollectionLimits(collectionId, limits);691    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;692    const result = getGenericResult(events);693694    expect(result.success).to.be.false;695  });696}697698export async function setCollectionSponsorExpectSuccess(collectionId: number, sponsor: string, sender = '//Alice') {699  await usingApi(async (api, privateKeyWrapper) => {700701    // Run the transaction702    const senderPrivateKey = privateKeyWrapper(sender);703    const tx = api.tx.unique.setCollectionSponsor(collectionId, sponsor);704    const events = await submitTransactionAsync(senderPrivateKey, tx);705    const result = getGenericResult(events);706707    // Get the collection708    const collection = await queryCollectionExpectSuccess(api, collectionId);709710    // What to expect711    expect(result.success).to.be.true;712    expect(collection.sponsorship.toJSON()).to.deep.equal({713      unconfirmed: sponsor,714    });715  });716}717718export async function removeCollectionSponsorExpectSuccess(collectionId: number, sender = '//Alice') {719  await usingApi(async (api, privateKeyWrapper) => {720721    // Run the transaction722    const alicePrivateKey = privateKeyWrapper(sender);723    const tx = api.tx.unique.removeCollectionSponsor(collectionId);724    const events = await submitTransactionAsync(alicePrivateKey, tx);725    const result = getGenericResult(events);726727    // Get the collection728    const collection = await queryCollectionExpectSuccess(api, collectionId);729730    // What to expect731    expect(result.success).to.be.true;732    expect(collection.sponsorship.toJSON()).to.be.deep.equal({disabled: null});733  });734}735736export async function removeCollectionSponsorExpectFailure(collectionId: number, senderSeed = '//Alice') {737  await usingApi(async (api, privateKeyWrapper) => {738739    // Run the transaction740    const alicePrivateKey = privateKeyWrapper(senderSeed);741    const tx = api.tx.unique.removeCollectionSponsor(collectionId);742    await expect(submitTransactionExpectFailAsync(alicePrivateKey, tx)).to.be.rejected;743  });744}745746export async function setCollectionSponsorExpectFailure(collectionId: number, sponsor: string, senderSeed = '//Alice') {747  await usingApi(async (api, privateKeyWrapper) => {748749    // Run the transaction750    const alicePrivateKey = privateKeyWrapper(senderSeed);751    const tx = api.tx.unique.setCollectionSponsor(collectionId, sponsor);752    await expect(submitTransactionExpectFailAsync(alicePrivateKey, tx)).to.be.rejected;753  });754}755756export async function confirmSponsorshipExpectSuccess(collectionId: number, senderSeed = '//Alice') {757  await usingApi(async (api, privateKeyWrapper) => {758759    // Run the transaction760    const sender = privateKeyWrapper(senderSeed);761    await confirmSponsorshipByKeyExpectSuccess(collectionId, sender);762  });763}764765export async function confirmSponsorshipByKeyExpectSuccess(collectionId: number, sender: IKeyringPair) {766  await usingApi(async (api, privateKeyWrapper) => {767768    // Run the transaction769    const tx = api.tx.unique.confirmSponsorship(collectionId);770    const events = await submitTransactionAsync(sender, tx);771    const result = getGenericResult(events);772773    // Get the collection774    const collection = await queryCollectionExpectSuccess(api, collectionId);775776    // What to expect777    expect(result.success).to.be.true;778    expect(collection.sponsorship.toJSON()).to.be.deep.equal({779      confirmed: sender.address,780    });781  });782}783784785export async function confirmSponsorshipExpectFailure(collectionId: number, senderSeed = '//Alice') {786  await usingApi(async (api, privateKeyWrapper) => {787788    // Run the transaction789    const sender = privateKeyWrapper(senderSeed);790    const tx = api.tx.unique.confirmSponsorship(collectionId);791    await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;792  });793}794795export async function enableContractSponsoringExpectSuccess(sender: IKeyringPair, contractAddress: AccountId | string, enable: boolean) {796  await usingApi(async (api) => {797    const tx = api.tx.unique.enableContractSponsoring(contractAddress, enable);798    const events = await submitTransactionAsync(sender, tx);799    const result = getGenericResult(events);800801    expect(result.success).to.be.true;802  });803}804805export async function enableContractSponsoringExpectFailure(sender: IKeyringPair, contractAddress: AccountId | string, enable: boolean) {806  await usingApi(async (api) => {807    const tx = api.tx.unique.enableContractSponsoring(contractAddress, enable);808    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;809    const result = getGenericResult(events);810811    expect(result.success).to.be.false;812  });813}814815export async function setTransferFlagExpectSuccess(sender: IKeyringPair, collectionId: number, enabled: boolean) {816817  await usingApi(async (api) => {818819    const tx = api.tx.unique.setTransfersEnabledFlag(collectionId, enabled);820    const events = await submitTransactionAsync(sender, tx);821    const result = getGenericResult(events);822823    expect(result.success).to.be.true;824  });825}826827export async function setTransferFlagExpectFailure(sender: IKeyringPair, collectionId: number, enabled: boolean) {828829  await usingApi(async (api) => {830831    const tx = api.tx.unique.setTransfersEnabledFlag(collectionId, enabled);832    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;833    const result = getGenericResult(events);834835    expect(result.success).to.be.false;836  });837}838839export async function setContractSponsoringRateLimitExpectSuccess(sender: IKeyringPair, contractAddress: AccountId | string, rateLimit: number) {840  await usingApi(async (api) => {841    const tx = api.tx.unique.setContractSponsoringRateLimit(contractAddress, rateLimit);842    const events = await submitTransactionAsync(sender, tx);843    const result = getGenericResult(events);844845    expect(result.success).to.be.true;846  });847}848849export async function setContractSponsoringRateLimitExpectFailure(sender: IKeyringPair, contractAddress: AccountId | string, rateLimit: number) {850  await usingApi(async (api) => {851    const tx = api.tx.unique.setContractSponsoringRateLimit(contractAddress, rateLimit);852    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;853    const result = getGenericResult(events);854855    expect(result.success).to.be.false;856  });857}858859export async function getNextSponsored(860  api: ApiPromise,861  collectionId: number,862  account: string | CrossAccountId,863  tokenId: number,864): Promise<number> {865  return Number((await api.rpc.unique.nextSponsored(collectionId, account, tokenId)).unwrapOr(-1));866}867868export async function toggleContractAllowlistExpectSuccess(sender: IKeyringPair, contractAddress: AccountId | string, value = true) {869  await usingApi(async (api) => {870    const tx = api.tx.unique.toggleContractAllowList(contractAddress, value);871    const events = await submitTransactionAsync(sender, tx);872    const result = getGenericResult(events);873874    expect(result.success).to.be.true;875  });876}877878export async function isAllowlistedInContract(contractAddress: AccountId | string, user: string) {879  let allowlisted = false;880  await usingApi(async (api) => {881    allowlisted = (await api.query.unique.contractAllowList(contractAddress, user)).toJSON() as boolean;882  });883  return allowlisted;884}885886export async function addToContractAllowListExpectSuccess(sender: IKeyringPair, contractAddress: AccountId | string, user: AccountId | string) {887  await usingApi(async (api) => {888    const tx = api.tx.unique.addToContractAllowList(contractAddress.toString(), user.toString());889    const events = await submitTransactionAsync(sender, tx);890    const result = getGenericResult(events);891892    expect(result.success).to.be.true;893  });894}895896export async function removeFromContractAllowListExpectSuccess(sender: IKeyringPair, contractAddress: AccountId | string, user: AccountId | string) {897  await usingApi(async (api) => {898    const tx = api.tx.unique.removeFromContractAllowList(contractAddress.toString(), user.toString());899    const events = await submitTransactionAsync(sender, tx);900    const result = getGenericResult(events);901902    expect(result.success).to.be.true;903  });904}905906export async function removeFromContractAllowListExpectFailure(sender: IKeyringPair, contractAddress: AccountId | string, user: AccountId | string) {907  await usingApi(async (api) => {908    const tx = api.tx.unique.removeFromContractAllowList(contractAddress.toString(), user.toString());909    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;910    const result = getGenericResult(events);911912    expect(result.success).to.be.false;913  });914}915916export interface CreateFungibleData {917  readonly Value: bigint;918}919920export interface CreateReFungibleData { }921export interface CreateNftData { }922923export type CreateItemData = {924  NFT: CreateNftData;925} | {926  Fungible: CreateFungibleData;927} | {928  ReFungible: CreateReFungibleData;929};930931export async function burnItem(api: ApiPromise, sender: IKeyringPair, collectionId: number, tokenId: number, value: number | bigint) : Promise<boolean> {932  const tx = api.tx.unique.burnItem(collectionId, tokenId, value);933  const events = await submitTransactionAsync(sender, tx);934  return getGenericResult(events).success;935}936937export async function burnItemExpectSuccess(sender: IKeyringPair, collectionId: number, tokenId: number, value: number | bigint = 1) {938  await usingApi(async (api) => {939    const balanceBefore = await getBalance(api, collectionId, normalizeAccountId(sender), tokenId);940    // if burning token by admin - use adminButnItemExpectSuccess941    expect(balanceBefore >= BigInt(value)).to.be.true;942943    expect(await burnItem(api, sender, collectionId, tokenId, value)).to.be.true;944945    const balanceAfter = await getBalance(api, collectionId, normalizeAccountId(sender), tokenId);946    expect(balanceAfter + BigInt(value)).to.be.equal(balanceBefore);947  });948}949950export async function burnItemExpectFailure(sender: IKeyringPair, collectionId: number, tokenId: number, value: number | bigint = 1) {951  await usingApi(async (api) => {952    const tx = api.tx.unique.burnItem(collectionId, tokenId, value);953954    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;955    const result = getCreateCollectionResult(events);956    // tslint:disable-next-line:no-unused-expression957    expect(result.success).to.be.false;958  });959}960961export async function burnFromExpectSuccess(sender: IKeyringPair, from: IKeyringPair | CrossAccountId, collectionId: number, tokenId: number, value: number | bigint = 1) {962  await usingApi(async (api) => {963    const tx = api.tx.unique.burnFrom(collectionId, normalizeAccountId(from), tokenId, value);964    const events = await submitTransactionAsync(sender, tx);965    return getGenericResult(events).success;966  });967}968969export async function970approve(971  api: ApiPromise,972  collectionId: number,973  tokenId: number, owner: IKeyringPair, approved: CrossAccountId | string | IKeyringPair, amount: number | bigint,974) {975  const approveUniqueTx = api.tx.unique.approve(normalizeAccountId(approved), collectionId, tokenId, amount);976  const events = await submitTransactionAsync(owner, approveUniqueTx);977  return getGenericResult(events).success;978}979980export async function981approveExpectSuccess(982  collectionId: number,983  tokenId: number, owner: IKeyringPair, approved: CrossAccountId | string, amount: number | bigint = 1,984) {985  await usingApi(async (api: ApiPromise) => {986    const result = await approve(api, collectionId, tokenId, owner, approved, amount);987    expect(result).to.be.true;988989    expect(await getAllowance(api, collectionId, owner, approved, tokenId)).to.be.equal(BigInt(amount));990  });991}992993export async function adminApproveFromExpectSuccess(994  collectionId: number,995  tokenId: number, admin: IKeyringPair, owner: CrossAccountId | string, approved: CrossAccountId | string, amount: number | bigint = 1,996) {997  await usingApi(async (api: ApiPromise) => {998    const approveUniqueTx = api.tx.unique.approve(normalizeAccountId(approved), collectionId, tokenId, amount);999    const events = await submitTransactionAsync(admin, approveUniqueTx);1000    const result = getGenericResult(events);1001    expect(result.success).to.be.true;10021003    expect(await getAllowance(api, collectionId, owner, approved, tokenId)).to.be.equal(BigInt(amount));1004  });1005}10061007export async function1008transferFrom(1009  api: ApiPromise,1010  collectionId: number,1011  tokenId: number,1012  accountApproved: IKeyringPair,1013  accountFrom: IKeyringPair | CrossAccountId,1014  accountTo: IKeyringPair | CrossAccountId,1015  value: number | bigint,1016) {1017  const from = normalizeAccountId(accountFrom);1018  const to = normalizeAccountId(accountTo);1019  const transferFromTx = api.tx.unique.transferFrom(from, to, collectionId, tokenId, value);1020  const events = await submitTransactionAsync(accountApproved, transferFromTx);1021  return getGenericResult(events).success;1022}10231024export async function1025transferFromExpectSuccess(1026  collectionId: number,1027  tokenId: number,1028  accountApproved: IKeyringPair,1029  accountFrom: IKeyringPair | CrossAccountId,1030  accountTo: IKeyringPair | CrossAccountId,1031  value: number | bigint = 1,1032  type = 'NFT',1033) {1034  await usingApi(async (api: ApiPromise) => {1035    const from = normalizeAccountId(accountFrom);1036    const to = normalizeAccountId(accountTo);1037    let balanceBefore = 0n;1038    if (type === 'Fungible' || type === 'ReFungible') {1039      balanceBefore = await getBalance(api, collectionId, to, tokenId);1040    }1041    expect(await transferFrom(api, collectionId, tokenId, accountApproved, accountFrom, accountTo, value)).to.be.true;1042    if (type === 'NFT') {1043      expect(await getTokenOwner(api, collectionId, tokenId)).to.be.deep.equal(to);1044    }1045    if (type === 'Fungible') {1046      const balanceAfter = await getBalance(api, collectionId, to, tokenId);1047      if (JSON.stringify(to) !== JSON.stringify(from)) {1048        expect(balanceAfter - balanceBefore).to.be.equal(BigInt(value));1049      } else {1050        expect(balanceAfter).to.be.equal(balanceBefore);1051      }1052    }1053    if (type === 'ReFungible') {1054      expect(await getBalance(api, collectionId, to, tokenId)).to.be.equal(balanceBefore + BigInt(value));1055    }1056  });1057}10581059export async function1060transferFromExpectFail(1061  collectionId: number,1062  tokenId: number,1063  accountApproved: IKeyringPair,1064  accountFrom: IKeyringPair,1065  accountTo: IKeyringPair,1066  value: number | bigint = 1,1067) {1068  await usingApi(async (api: ApiPromise) => {1069    const transferFromTx = api.tx.unique.transferFrom(normalizeAccountId(accountFrom.address), normalizeAccountId(accountTo.address), collectionId, tokenId, value);1070    const events = await expect(submitTransactionExpectFailAsync(accountApproved, transferFromTx)).to.be.rejected;1071    const result = getCreateCollectionResult(events);1072    // tslint:disable-next-line:no-unused-expression1073    expect(result.success).to.be.false;1074  });1075}10761077/* eslint no-async-promise-executor: "off" */1078export async function getBlockNumber(api: ApiPromise): Promise<number> {1079  return new Promise<number>(async (resolve) => {1080    const unsubscribe = await api.rpc.chain.subscribeNewHeads((head) => {1081      unsubscribe();1082      resolve(head.number.toNumber());1083    });1084  });1085}10861087export async function addCollectionAdminExpectSuccess(sender: IKeyringPair, collectionId: number, address: string | CrossAccountId) {1088  await usingApi(async (api) => {1089    const changeAdminTx = api.tx.unique.addCollectionAdmin(collectionId, normalizeAccountId(address));1090    const events = await submitTransactionAsync(sender, changeAdminTx);1091    const result = getCreateCollectionResult(events);1092    expect(result.success).to.be.true;1093  });1094}10951096export async function adminApproveFromExpectFail(1097  collectionId: number,1098  tokenId: number, admin: IKeyringPair, owner: CrossAccountId | string, approved: CrossAccountId | string, amount: number | bigint = 1,1099) {1100  await usingApi(async (api: ApiPromise) => {1101    const approveUniqueTx = api.tx.unique.approve(normalizeAccountId(approved), collectionId, tokenId, amount);1102    const events = await expect(submitTransactionAsync(admin, approveUniqueTx)).to.be.rejected;1103    const result = getGenericResult(events);1104    expect(result.success).to.be.false;1105  });1106}11071108export async function1109getFreeBalance(account: IKeyringPair): Promise<bigint> {1110  let balance = 0n;1111  await usingApi(async (api) => {1112    balance = BigInt((await api.query.system.account(account.address)).data.free.toString());1113  });11141115  return balance;1116}11171118export async function paraSiblingSovereignAccount(paraid: number): Promise<string> {1119  return usingApi(async api => {1120    // We are getting a *sibling* parachain sovereign account,1121    // so we need a sibling prefix: encoded(b"sibl") == 0x7369626c1122    const siblingPrefix = '0x7369626c';11231124    const encodedParaId = api.createType('u32', paraid).toHex(true).substring(2);1125    const suffix = '000000000000000000000000000000000000000000000000';11261127    return siblingPrefix + encodedParaId + suffix;1128  });1129}11301131export async function transferBalanceTo(api: ApiPromise, source: IKeyringPair, target: string, amount = 1000n * UNIQUE) {1132  const tx = api.tx.balances.transfer(target, amount);1133  const events = await submitTransactionAsync(source, tx);1134  const result = getGenericResult(events);1135  expect(result.success).to.be.true;1136}11371138export async function1139scheduleExpectSuccess(1140  operationTx: any,1141  sender: IKeyringPair,1142  blockSchedule: number,1143  scheduledId: string,1144  period = 1,1145  repetitions = 1,1146) {1147  await usingApi(async (api: ApiPromise) => {1148    const blockNumber: number | undefined = await getBlockNumber(api);1149    const expectedBlockNumber = blockNumber + blockSchedule;11501151    expect(blockNumber).to.be.greaterThan(0);1152    const scheduleTx = api.tx.scheduler.scheduleNamed( // schedule1153      scheduledId,1154      expectedBlockNumber,1155      repetitions > 1 ? [period, repetitions] : null,1156      0,1157      {Value: operationTx as any},1158    );11591160    const events = await submitTransactionAsync(sender, scheduleTx);1161    expect(getGenericResult(events).success).to.be.true;1162  });1163}11641165export async function1166scheduleExpectFailure(1167  operationTx: any,1168  sender: IKeyringPair,1169  blockSchedule: number,1170  scheduledId: string,1171  period = 1,1172  repetitions = 1,1173) {1174  await usingApi(async (api: ApiPromise) => {1175    const blockNumber: number | undefined = await getBlockNumber(api);1176    const expectedBlockNumber = blockNumber + blockSchedule;11771178    expect(blockNumber).to.be.greaterThan(0);1179    const scheduleTx = api.tx.scheduler.scheduleNamed( // schedule1180      scheduledId,1181      expectedBlockNumber,1182      repetitions <= 1 ? null : [period, repetitions],1183      0,1184      {Value: operationTx as any},1185    );11861187    //const events =1188    await expect(submitTransactionExpectFailAsync(sender, scheduleTx)).to.be.rejected;1189    //expect(getGenericResult(events).success).to.be.false;1190  });1191}11921193export async function1194scheduleTransferAndWaitExpectSuccess(1195  collectionId: number,1196  tokenId: number,1197  sender: IKeyringPair,1198  recipient: IKeyringPair,1199  value: number | bigint = 1,1200  blockSchedule: number,1201  scheduledId: string,1202) {1203  await usingApi(async (api: ApiPromise) => {1204    await scheduleTransferExpectSuccess(collectionId, tokenId, sender, recipient, value, blockSchedule, scheduledId);12051206    const recipientBalanceBefore = (await api.query.system.account(recipient.address)).data.free.toBigInt();12071208    // sleep for n + 1 blocks1209    await waitNewBlocks(blockSchedule + 1);12101211    const recipientBalanceAfter = (await api.query.system.account(recipient.address)).data.free.toBigInt();12121213    expect(await getTokenOwner(api, collectionId, tokenId)).to.be.deep.equal(normalizeAccountId(recipient.address));1214    expect(recipientBalanceAfter).to.be.equal(recipientBalanceBefore);1215  });1216}12171218export async function1219scheduleTransferExpectSuccess(1220  collectionId: number,1221  tokenId: number,1222  sender: IKeyringPair,1223  recipient: IKeyringPair,1224  value: number | bigint = 1,1225  blockSchedule: number,1226  scheduledId: string,1227) {1228  await usingApi(async (api: ApiPromise) => {1229    const transferTx = api.tx.unique.transfer(normalizeAccountId(recipient.address), collectionId, tokenId, value);12301231    await scheduleExpectSuccess(transferTx, sender, blockSchedule, scheduledId);12321233    expect(await getTokenOwner(api, collectionId, tokenId)).to.be.deep.equal(normalizeAccountId(sender.address));1234  });1235}12361237export async function1238scheduleTransferFundsPeriodicExpectSuccess(1239  amount: bigint,1240  sender: IKeyringPair,1241  recipient: IKeyringPair,1242  blockSchedule: number,1243  scheduledId: string,1244  period: number,1245  repetitions: number,1246) {1247  await usingApi(async (api: ApiPromise) => {1248    const transferTx = api.tx.balances.transfer(recipient.address, amount);12491250    const balanceBefore = await getFreeBalance(recipient);12511252    await scheduleExpectSuccess(transferTx, sender, blockSchedule, scheduledId, period, repetitions);12531254    expect(await getFreeBalance(recipient)).to.be.equal(balanceBefore);1255  });1256}12571258export async function1259transfer(1260  api: ApiPromise,1261  collectionId: number,1262  tokenId: number,1263  sender: IKeyringPair,1264  recipient: IKeyringPair | CrossAccountId,1265  value: number | bigint,1266) : Promise<boolean> {1267  const transferTx = api.tx.unique.transfer(normalizeAccountId(recipient), collectionId, tokenId, value);1268  const events = await executeTransaction(api, sender, transferTx);1269  return getGenericResult(events).success;1270}12711272export async function1273transferExpectSuccess(1274  collectionId: number,1275  tokenId: number,1276  sender: IKeyringPair,1277  recipient: IKeyringPair | CrossAccountId,1278  value: number | bigint = 1,1279  type = 'NFT',1280) {1281  await usingApi(async (api: ApiPromise) => {1282    const from = normalizeAccountId(sender);1283    const to = normalizeAccountId(recipient);12841285    let balanceBefore = 0n;1286    if (type === 'Fungible' || type === 'ReFungible') {1287      balanceBefore = await getBalance(api, collectionId, to, tokenId);1288    }12891290    const transferTx = api.tx.unique.transfer(normalizeAccountId(recipient), collectionId, tokenId, value);1291    const events = await executeTransaction(api, sender, transferTx);1292    const result = getTransferResult(api, events);12931294    expect(result.collectionId).to.be.equal(collectionId);1295    expect(result.itemId).to.be.equal(tokenId);1296    expect(result.sender).to.be.deep.equal(normalizeAccountId(sender.address));1297    expect(result.recipient).to.be.deep.equal(to);1298    expect(result.value).to.be.equal(BigInt(value));12991300    if (type === 'NFT') {1301      expect(await getTokenOwner(api, collectionId, tokenId)).to.be.deep.equal(to);1302    }1303    if (type === 'Fungible' || type === 'ReFungible') {1304      const balanceAfter = await getBalance(api, collectionId, to, tokenId);1305      if (JSON.stringify(to) !== JSON.stringify(from)) {1306        expect(balanceAfter - balanceBefore).to.be.equal(BigInt(value));1307      } else {1308        expect(balanceAfter).to.be.equal(balanceBefore);1309      }1310    }1311  });1312}13131314export async function1315transferExpectFailure(1316  collectionId: number,1317  tokenId: number,1318  sender: IKeyringPair,1319  recipient: IKeyringPair | CrossAccountId,1320  value: number | bigint = 1,1321) {1322  await usingApi(async (api: ApiPromise) => {1323    const transferTx = api.tx.unique.transfer(normalizeAccountId(recipient), collectionId, tokenId, value);1324    const events = await expect(submitTransactionExpectFailAsync(sender, transferTx)).to.be.rejected;1325    const result = getGenericResult(events);1326    // if (events && Array.isArray(events)) {1327    //   const result = getCreateCollectionResult(events);1328    // tslint:disable-next-line:no-unused-expression1329    expect(result.success).to.be.false;1330    //}1331  });1332}13331334export async function1335approveExpectFail(1336  collectionId: number,1337  tokenId: number, owner: IKeyringPair, approved: IKeyringPair, amount: number | bigint = 1,1338) {1339  await usingApi(async (api: ApiPromise) => {1340    const approveUniqueTx = api.tx.unique.approve(normalizeAccountId(approved.address), collectionId, tokenId, amount);1341    const events = await expect(submitTransactionExpectFailAsync(owner, approveUniqueTx)).to.be.rejected;1342    const result = getCreateCollectionResult(events);1343    // tslint:disable-next-line:no-unused-expression1344    expect(result.success).to.be.false;1345  });1346}13471348export async function getBalance(1349  api: ApiPromise,1350  collectionId: number,1351  owner: string | CrossAccountId | IKeyringPair,1352  token: number,1353): Promise<bigint> {1354  return (await api.rpc.unique.balance(collectionId, normalizeAccountId(owner), token)).toBigInt();1355}1356export async function getTokenOwner(1357  api: ApiPromise,1358  collectionId: number,1359  token: number,1360): Promise<CrossAccountId> {1361  const owner = (await api.rpc.unique.tokenOwner(collectionId, token)).toJSON() as any;1362  if (owner == null) throw new Error('owner == null');1363  return normalizeAccountId(owner);1364}1365export async function getTopmostTokenOwner(1366  api: ApiPromise,1367  collectionId: number,1368  token: number,1369): Promise<CrossAccountId> {1370  const owner = (await api.rpc.unique.topmostTokenOwner(collectionId, token)).toJSON() as any;1371  if (owner == null) throw new Error('owner == null');1372  return normalizeAccountId(owner);1373}1374export async function getTokenChildren(1375  api: ApiPromise,1376  collectionId: number,1377  tokenId: number,1378): Promise<UpDataStructsTokenChild[]> {1379  return (await api.rpc.unique.tokenChildren(collectionId, tokenId)).toJSON() as any;1380}1381export async function isTokenExists(1382  api: ApiPromise,1383  collectionId: number,1384  token: number,1385): Promise<boolean> {1386  return (await api.rpc.unique.tokenExists(collectionId, token)).toJSON();1387}1388export async function getLastTokenId(1389  api: ApiPromise,1390  collectionId: number,1391): Promise<number> {1392  return (await api.rpc.unique.lastTokenId(collectionId)).toJSON();1393}1394export async function getAdminList(1395  api: ApiPromise,1396  collectionId: number,1397): Promise<string[]> {1398  return (await api.rpc.unique.adminlist(collectionId)).toHuman() as any;1399}1400export async function getTokenProperties(1401  api: ApiPromise,1402  collectionId: number,1403  tokenId: number,1404  propertyKeys: string[],1405): Promise<UpDataStructsProperty[]> {1406  return (await api.rpc.unique.tokenProperties(collectionId, tokenId, propertyKeys)).toHuman() as any;1407}14081409export async function createFungibleItemExpectSuccess(1410  sender: IKeyringPair,1411  collectionId: number,1412  data: CreateFungibleData,1413  owner: CrossAccountId | string = sender.address,1414) {1415  return await usingApi(async (api) => {1416    const tx = api.tx.unique.createItem(collectionId, normalizeAccountId(owner), {Fungible: data});14171418    const events = await submitTransactionAsync(sender, tx);1419    const result = getCreateItemResult(events);14201421    expect(result.success).to.be.true;1422    return result.itemId;1423  });1424}14251426export async function createMultipleItemsExpectSuccess(sender: IKeyringPair, collectionId: number, itemsData: any, owner: CrossAccountId | string = sender.address) {1427  await usingApi(async (api) => {1428    const to = normalizeAccountId(owner);1429    const tx = api.tx.unique.createMultipleItems(collectionId, to, itemsData);14301431    const events = await submitTransactionAsync(sender, tx);1432    expect(getGenericResult(events).success).to.be.true;1433  });1434}14351436export async function createMultipleItemsWithPropsExpectSuccess(sender: IKeyringPair, collectionId: number, itemsData: any, owner: CrossAccountId | string = sender.address) {1437  await usingApi(async (api) => {1438    const to = normalizeAccountId(owner);1439    const tx = api.tx.unique.createMultipleItems(collectionId, to, itemsData);14401441    const events = await submitTransactionAsync(sender, tx);1442    const result = getCreateItemsResult(events);14431444    for (const res of result) {1445      expect(await api.rpc.unique.tokenProperties(collectionId, res.itemId)).not.to.be.empty;1446    }1447  });1448}14491450export async function createMultipleItemsExWithPropsExpectSuccess(sender: IKeyringPair, collectionId: number, itemsData: any) {1451  await usingApi(async (api) => {1452    const tx = api.tx.unique.createMultipleItemsEx(collectionId, itemsData);14531454    const events = await submitTransactionAsync(sender, tx);1455    const result = getCreateItemsResult(events);14561457    for (const res of result) {1458      expect(await api.rpc.unique.tokenProperties(collectionId, res.itemId)).not.to.be.empty;1459    }1460  });1461}14621463export async function createItemWithPropsExpectSuccess(sender: IKeyringPair, collectionId: number, createMode: string, props:  Array<Property>, owner: CrossAccountId | string = sender.address) {1464  let newItemId = 0;1465  await usingApi(async (api) => {1466    const to = normalizeAccountId(owner);1467    const itemCountBefore = await getLastTokenId(api, collectionId);1468    const itemBalanceBefore = await getBalance(api, collectionId, to, newItemId);14691470    let tx;1471    if (createMode === 'Fungible') {1472      const createData = {fungible: {value: 10}};1473      tx = api.tx.unique.createItem(collectionId, to, createData as any);1474    } else if (createMode === 'ReFungible') {1475      const createData = {refungible: {pieces: 100}};1476      tx = api.tx.unique.createItem(collectionId, to, createData as any);1477    } else {1478      const data = api.createType('UpDataStructsCreateItemData', {NFT: {properties: props}});1479      tx = api.tx.unique.createItem(collectionId, to, data as UpDataStructsCreateItemData);1480    }14811482    const events = await submitTransactionAsync(sender, tx);1483    const result = getCreateItemResult(events);14841485    const itemCountAfter = await getLastTokenId(api, collectionId);1486    const itemBalanceAfter = await getBalance(api, collectionId, to, newItemId);14871488    if (createMode === 'NFT') {1489      expect(await api.rpc.unique.tokenProperties(collectionId, result.itemId)).not.to.be.empty;1490    }14911492    // What to expect1493    // tslint:disable-next-line:no-unused-expression1494    expect(result.success).to.be.true;1495    if (createMode === 'Fungible') {1496      expect(itemBalanceAfter - itemBalanceBefore).to.be.equal(10n);1497    } else {1498      expect(itemCountAfter).to.be.equal(itemCountBefore + 1);1499    }1500    expect(collectionId).to.be.equal(result.collectionId);1501    expect(itemCountAfter.toString()).to.be.equal(result.itemId.toString());1502    expect(to).to.be.deep.equal(result.recipient);1503    newItemId = result.itemId;1504  });1505  return newItemId;1506}15071508export async function createItemWithPropsExpectFailure(sender: IKeyringPair, collectionId: number, createMode: string, props: Array<Property>, owner: CrossAccountId | string = sender.address) {1509  await usingApi(async (api) => {15101511    let tx;1512    if (createMode === 'NFT') {1513      const data = api.createType('UpDataStructsCreateItemData', {NFT: {properties: props}}) as UpDataStructsCreateItemData;1514      tx = api.tx.unique.createItem(collectionId, normalizeAccountId(owner), data);1515    } else {1516      tx = api.tx.unique.createItem(collectionId, normalizeAccountId(owner), createMode);1517    }151815191520    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;1521    if(events.message && events.message.toString().indexOf('1002: Verification Error') > -1) return;1522    const result = getCreateItemResult(events);15231524    expect(result.success).to.be.false;1525  });1526}15271528export async function createItemExpectSuccess(sender: IKeyringPair, collectionId: number, createMode: string, owner: CrossAccountId | string = sender.address) {1529  let newItemId = 0;1530  await usingApi(async (api) => {1531    const to = normalizeAccountId(owner);1532    const itemCountBefore = await getLastTokenId(api, collectionId);1533    const itemBalanceBefore = await getBalance(api, collectionId, to, newItemId);15341535    let tx;1536    if (createMode === 'Fungible') {1537      const createData = {fungible: {value: 10}};1538      tx = api.tx.unique.createItem(collectionId, to, createData as any);1539    } else if (createMode === 'ReFungible') {1540      const createData = {refungible: {pieces: 100}};1541      tx = api.tx.unique.createItem(collectionId, to, createData as any);1542    } else {1543      const createData = {nft: {}};1544      tx = api.tx.unique.createItem(collectionId, to, createData as any);1545    }15461547    const events = await executeTransaction(api, sender, tx);1548    const result = getCreateItemResult(events);15491550    const itemCountAfter = await getLastTokenId(api, collectionId);1551    const itemBalanceAfter = await getBalance(api, collectionId, to, newItemId);15521553    // What to expect1554    // tslint:disable-next-line:no-unused-expression1555    expect(result.success).to.be.true;1556    if (createMode === 'Fungible') {1557      expect(itemBalanceAfter - itemBalanceBefore).to.be.equal(10n);1558    } else {1559      expect(itemCountAfter).to.be.equal(itemCountBefore + 1);1560    }1561    expect(collectionId).to.be.equal(result.collectionId);1562    expect(itemCountAfter.toString()).to.be.equal(result.itemId.toString());1563    expect(to).to.be.deep.equal(result.recipient);1564    newItemId = result.itemId;1565  });1566  return newItemId;1567}15681569export async function createRefungibleToken(api: ApiPromise, sender: IKeyringPair, collectionId: number, amount: bigint, owner: CrossAccountId | IKeyringPair | string = sender.address) : Promise<CreateItemResult> {1570  const createData = {refungible: {pieces: amount}};1571  const tx = api.tx.unique.createItem(collectionId, normalizeAccountId(owner), createData as any);15721573  const events = await submitTransactionAsync(sender, tx);1574  return  getCreateItemResult(events);1575}15761577export async function createItemExpectFailure(sender: IKeyringPair, collectionId: number, createMode: string, owner: CrossAccountId | string = sender.address) {1578  await usingApi(async (api) => {1579    const tx = api.tx.unique.createItem(collectionId, normalizeAccountId(owner), createMode);15801581    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;1582    const result = getCreateItemResult(events);15831584    expect(result.success).to.be.false;1585  });1586}15871588export async function setPublicAccessModeExpectSuccess(1589  sender: IKeyringPair, collectionId: number,1590  accessMode: 'Normal' | 'AllowList',1591) {1592  await usingApi(async (api) => {15931594    // Run the transaction1595    const tx = api.tx.unique.setCollectionPermissions(collectionId, {access: accessMode});1596    const events = await submitTransactionAsync(sender, tx);1597    const result = getGenericResult(events);15981599    // Get the collection1600    const collection = await queryCollectionExpectSuccess(api, collectionId);16011602    // What to expect1603    // tslint:disable-next-line:no-unused-expression1604    expect(result.success).to.be.true;1605    expect(collection.permissions.access.toHuman()).to.be.equal(accessMode);1606  });1607}16081609export async function setPublicAccessModeExpectFail(1610  sender: IKeyringPair, collectionId: number,1611  accessMode: 'Normal' | 'AllowList',1612) {1613  await usingApi(async (api) => {16141615    // Run the transaction1616    const tx = api.tx.unique.setCollectionPermissions(collectionId, {access: accessMode});1617    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;1618    const result = getGenericResult(events);16191620    // What to expect1621    // tslint:disable-next-line:no-unused-expression1622    expect(result.success).to.be.false;1623  });1624}16251626export async function enableAllowListExpectSuccess(sender: IKeyringPair, collectionId: number) {1627  await setPublicAccessModeExpectSuccess(sender, collectionId, 'AllowList');1628}16291630export async function enableAllowListExpectFail(sender: IKeyringPair, collectionId: number) {1631  await setPublicAccessModeExpectFail(sender, collectionId, 'AllowList');1632}16331634export async function disableAllowListExpectSuccess(sender: IKeyringPair, collectionId: number) {1635  await setPublicAccessModeExpectSuccess(sender, collectionId, 'Normal');1636}16371638export async function setMintPermissionExpectSuccess(sender: IKeyringPair, collectionId: number, enabled: boolean) {1639  await usingApi(async (api) => {16401641    // Run the transaction1642    const tx = api.tx.unique.setCollectionPermissions(collectionId, {mintMode: enabled});1643    const events = await submitTransactionAsync(sender, tx);1644    const result = getGenericResult(events);1645    expect(result.success).to.be.true;16461647    // Get the collection1648    const collection = await queryCollectionExpectSuccess(api, collectionId);16491650    expect(collection.permissions.mintMode.toHuman()).to.be.equal(enabled);1651  });1652}16531654export async function enablePublicMintingExpectSuccess(sender: IKeyringPair, collectionId: number) {1655  await setMintPermissionExpectSuccess(sender, collectionId, true);1656}16571658export async function setMintPermissionExpectFailure(sender: IKeyringPair, collectionId: number, enabled: boolean) {1659  await usingApi(async (api) => {1660    // Run the transaction1661    const tx = api.tx.unique.setCollectionPermissions(collectionId, {mintMode: enabled});1662    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;1663    const result = getCreateCollectionResult(events);1664    // tslint:disable-next-line:no-unused-expression1665    expect(result.success).to.be.false;1666  });1667}16681669export async function setChainLimitsExpectFailure(sender: IKeyringPair, limits: IChainLimits) {1670  await usingApi(async (api) => {1671    // Run the transaction1672    const tx = api.tx.unique.setChainLimits(limits);1673    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;1674    const result = getCreateCollectionResult(events);1675    // tslint:disable-next-line:no-unused-expression1676    expect(result.success).to.be.false;1677  });1678}16791680export async function isAllowlisted(api: ApiPromise, collectionId: number, address: string | CrossAccountId | IKeyringPair) {1681  return (await api.rpc.unique.allowed(collectionId, normalizeAccountId(address))).toJSON();1682}16831684export async function addToAllowListExpectSuccess(sender: IKeyringPair, collectionId: number, address: string | AccountId | CrossAccountId) {1685  await usingApi(async (api) => {1686    expect(await isAllowlisted(api, collectionId, normalizeAccountId(address))).to.be.false;16871688    // Run the transaction1689    const tx = api.tx.unique.addToAllowList(collectionId, normalizeAccountId(address));1690    const events = await submitTransactionAsync(sender, tx);1691    const result = getGenericResult(events);1692    expect(result.success).to.be.true;16931694    expect(await isAllowlisted(api, collectionId, normalizeAccountId(address))).to.be.true;1695  });1696}16971698export async function addToAllowListAgainExpectSuccess(sender: IKeyringPair, collectionId: number, address: string | AccountId) {1699  await usingApi(async (api) => {17001701    expect(await isAllowlisted(api, collectionId, normalizeAccountId(address))).to.be.true;17021703    // Run the transaction1704    const tx = api.tx.unique.addToAllowList(collectionId, normalizeAccountId(address));1705    const events = await submitTransactionAsync(sender, tx);1706    const result = getGenericResult(events);1707    expect(result.success).to.be.true;17081709    expect(await isAllowlisted(api, collectionId, normalizeAccountId(address))).to.be.true;1710  });1711}17121713export async function addToAllowListExpectFail(sender: IKeyringPair, collectionId: number, address: string | AccountId) {1714  await usingApi(async (api) => {17151716    // Run the transaction1717    const tx = api.tx.unique.addToAllowList(collectionId, normalizeAccountId(address));1718    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;1719    const result = getGenericResult(events);17201721    // What to expect1722    // tslint:disable-next-line:no-unused-expression1723    expect(result.success).to.be.false;1724  });1725}17261727export async function removeFromAllowListExpectSuccess(sender: IKeyringPair, collectionId: number, address: CrossAccountId) {1728  await usingApi(async (api) => {1729    // Run the transaction1730    const tx = api.tx.unique.removeFromAllowList(collectionId, normalizeAccountId(address));1731    const events = await submitTransactionAsync(sender, tx);1732    const result = getGenericResult(events);17331734    // What to expect1735    // tslint:disable-next-line:no-unused-expression1736    expect(result.success).to.be.true;1737  });1738}17391740export async function removeFromAllowListExpectFailure(sender: IKeyringPair, collectionId: number, address: CrossAccountId) {1741  await usingApi(async (api) => {1742    // Run the transaction1743    const tx = api.tx.unique.removeFromAllowList(collectionId, normalizeAccountId(address));1744    const events = await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;1745    const result = getGenericResult(events);17461747    // What to expect1748    // tslint:disable-next-line:no-unused-expression1749    expect(result.success).to.be.false;1750  });1751}17521753export const getDetailedCollectionInfo = async (api: ApiPromise, collectionId: number)1754  : Promise<UpDataStructsRpcCollection | null> => {1755  return (await api.rpc.unique.collectionById(collectionId)).unwrapOr(null);1756};17571758export const getCreatedCollectionCount = async (api: ApiPromise): Promise<number> => {1759  // set global object - collectionsCount1760  return (await api.rpc.unique.collectionStats()).created.toNumber();1761};17621763export async function queryCollectionExpectSuccess(api: ApiPromise, collectionId: number): Promise<UpDataStructsRpcCollection> {1764  return (await api.rpc.unique.collectionById(collectionId)).unwrap();1765}17661767export const describe_xcm = (1768  process.env.RUN_XCM_TESTS1769    ? describe1770    : describe.skip1771);17721773export async function waitNewBlocks(blocksCount = 1): Promise<void> {1774  await usingApi(async (api) => {1775    const promise = new Promise<void>(async (resolve) => {1776      const unsubscribe = await api.rpc.chain.subscribeNewHeads(() => {1777        if (blocksCount > 0) {1778          blocksCount--;1779        } else {1780          unsubscribe();1781          resolve();1782        }1783      });1784    });1785    return promise;1786  });1787}17881789export async function waitEvent(1790  api: ApiPromise,1791  maxBlocksToWait: number,1792  eventSection: string,1793  eventMethod: string,1794): Promise<EventRecord | null> {17951796  const promise = new Promise<EventRecord | null>(async (resolve) => {1797    const unsubscribe = await api.rpc.chain.subscribeNewHeads(async header => {1798      const blockNumber = header.number.toHuman();1799      const blockHash = header.hash;1800      const eventIdStr = `${eventSection}.${eventMethod}`;1801      const waitLimitStr = `wait blocks remaining: ${maxBlocksToWait}`;18021803      console.log(`[Block #${blockNumber}] Waiting for event \`${eventIdStr}\` (${waitLimitStr})`);18041805      const apiAt = await api.at(blockHash);1806      const eventRecords = await apiAt.query.system.events();18071808      const neededEvent = eventRecords.find(r => {1809        return r.event.section == eventSection && r.event.method == eventMethod;1810      });18111812      if (neededEvent) {1813        unsubscribe();1814        resolve(neededEvent);1815      } else if (maxBlocksToWait > 0) {1816        maxBlocksToWait--;1817      } else {1818        console.log(`Event \`${eventIdStr}\` is NOT found`);18191820        unsubscribe();1821        resolve(null);1822      }1823    });1824  });1825  return promise;1826}18271828export async function repartitionRFT(1829  api: ApiPromise,1830  collectionId: number,1831  sender: IKeyringPair,1832  tokenId: number,1833  amount: bigint,1834): Promise<boolean> {1835  const tx = api.tx.unique.repartition(collectionId, tokenId, amount);1836  const events = await submitTransactionAsync(sender, tx);1837  const result = getGenericResult(events);18381839  return result.success;1840}18411842export async function itApi(name: string, cb: (apis: { api: ApiPromise, privateKeyWrapper: (account: string) => IKeyringPair }) => any, opts: { only?: boolean, skip?: boolean } = {}) {1843  let i: any = it;1844  if (opts.only) i = i.only;1845  else if (opts.skip) i = i.skip;1846  i(name, async () => {1847    await usingApi(async (api, privateKeyWrapper) => {1848      await cb({api, privateKeyWrapper});1849    });1850  });1851}18521853itApi.only = (name: string, cb: (apis: { api: ApiPromise, privateKeyWrapper: (account: string) => IKeyringPair }) => any) => itApi(name, cb, {only: true});1854itApi.skip = (name: string, cb: (apis: { api: ApiPromise, privateKeyWrapper: (account: string) => IKeyringPair }) => any) => itApi(name, cb, {skip: true});18551856let accountSeed = 10000;1857export function generateKeyringPair(keyring: Keyring) {1858  const privateKey = `0xDEADBEEF${(Date.now() + (accountSeed++)).toString(16).padStart(64 - 8, '0')}`;1859  return keyring.addFromUri(privateKey);1860}18611862export async function expectSubstrateEventsAtBlock(api: ApiPromise, blockNumber: AnyNumber | BlockNumber, section: string, methods: string[], dryRun = false) {1863  const blockHash = await api.rpc.chain.getBlockHash(blockNumber);1864  const subEvents = (await api.query.system.events.at(blockHash))1865    .filter(x => x.event.section === section)1866    .map((x) => x.toHuman());1867  const events = methods.map((m) => {1868    return {1869      event: {1870        method: m,1871        section,1872      },1873    };1874  });1875  if (!dryRun) {1876    expect(subEvents).to.be.like(events);1877  }1878  return subEvents;1879}
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
--- a/tests/src/util/playgrounds/unique.ts
+++ b/tests/src/util/playgrounds/unique.ts
@@ -330,6 +330,11 @@
     this.chainLog = [];
   }
 
+  getApi(): ApiPromise {
+    if(this.api === null) throw Error('API not initialized');
+    return this.api;
+  }
+
   clearChainLog(): void {
     this.chainLog = [];
   }
@@ -1986,7 +1991,7 @@
    * @returns ss58Format, token decimals, and token symbol
    */
   getChainProperties(): IChainProperties {
-    const properties = (this.helper.api as any).registry.getChainProperties().toJSON();
+    const properties = (this.helper.getApi() as any).registry.getChainProperties().toJSON();
     return {
       ss58Format: properties.ss58Format.toJSON(),
       tokenDecimals: properties.tokenDecimals.toJSON(),
@@ -2029,7 +2034,7 @@
    * @returns number, account's nonce
    */
   async getNonce(address: TSubstrateAccount): Promise<number> {
-    return (await (this.helper.api as any).query.system.account(address)).nonce.toNumber();
+    return (await this.helper.callRpc('api.query.system.account', [address])).nonce.toNumber();
   }
 }
 
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';