git.delta.rocks / unique-network / refs/commits / dae8a5f4351f

--- a/tests/src/eth/collectionSponsoring.test.ts
+++ b/tests/src/eth/collectionSponsoring.test.ts
@@ -1,33 +1,45 @@
-import {addToAllowListExpectSuccess, confirmSponsorshipExpectSuccess, createCollectionExpectSuccess, enablePublicMintingExpectSuccess, getDetailedCollectionInfo, setCollectionSponsorExpectSuccess, UNIQUE} from '../util/helpers';
-import {itWeb3, createEthAccount, collectionIdToAddress, GAS_ARGS, normalizeEvents, createEthAccountWithBalance, evmCollectionHelpers, getCollectionAddressFromResult, evmCollection, ethBalanceViaSub} from './util/helpers';
-import nonFungibleAbi from './nonFungibleAbi.json';
-import {expect} from 'chai';
-import {evmToAddress} from '@polkadot/util-crypto';
+import {IKeyringPair} from '@polkadot/types/types';
+import {usingPlaygrounds} from './../util/playgrounds/index';
+import {itEth, expect} from '../eth/util/playgrounds';
 
 describe('evm collection sponsoring', () => {
-  itWeb3('sponsors mint transactions', async ({web3, privateKeyWrapper}) => {
-    const alice = privateKeyWrapper('//Alice');
+  let donor: IKeyringPair;
+  let alice: IKeyringPair;
+  let nominal: bigint;
+
+  before(async () => {
+    await usingPlaygrounds(async (helper, privateKey) => {
+      donor = privateKey('//Alice');
+      nominal = helper.balance.getOneTokenNominal();
+    });
+  });
+
+  beforeEach(async () => {
+    await usingPlaygrounds(async (helper) => {
+      [alice] = await helper.arrange.createAccounts([1000n], donor);
+    });
+  });
 
-    const collection = await createCollectionExpectSuccess();
-    await setCollectionSponsorExpectSuccess(collection, alice.address);
-    await confirmSponsorshipExpectSuccess(collection);
+  itEth('sponsors mint transactions', async ({helper}) => {
+    const collection = await helper.nft.mintCollection(alice, {tokenPrefix: 'spnr', permissions: {mintMode: true}});
+    await collection.setSponsor(alice, alice.address);
+    await collection.confirmSponsorship(alice);
 
-    const minter = createEthAccount(web3);
-    expect(await web3.eth.getBalance(minter)).to.equal('0');
+    const minter = helper.eth.createAccount();
+    expect(await helper.balance.getEthereum(minter)).to.equal(0n);
 
-    const address = collectionIdToAddress(collection);
-    const contract = new web3.eth.Contract(nonFungibleAbi as any, collectionIdToAddress(collection), {from: minter, ...GAS_ARGS});
+    const collectionAddress = helper.ethAddress.fromCollectionId(collection.collectionId);
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'nft', minter);
 
-    await enablePublicMintingExpectSuccess(alice, collection);
-    await addToAllowListExpectSuccess(alice, collection, {Ethereum: minter});
+    await collection.addToAllowList(alice, {Ethereum: minter});
 
     const nextTokenId = await contract.methods.nextTokenId().call();
     expect(nextTokenId).to.equal('1');
     const result = await contract.methods.mint(minter, nextTokenId).send();
-    const events = normalizeEvents(result.events);
+    const events = helper.eth.normalizeEvents(result.events);
     expect(events).to.be.deep.equal([
       {
-        address,
+        address: collectionAddress,
         event: 'Transfer',
         args: {
           from: '0x0000000000000000000000000000000000000000',
@@ -59,13 +71,14 @@
   //   expect(bigIntToSub(api, BigInt(sponsorTuple[1]))).to.be.eq(sponsor.address);
   // });
 
-  itWeb3('Remove sponsor', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const collectionHelpers = evmCollectionHelpers(web3, owner);
-    let result = await collectionHelpers.methods.createNonfungibleCollection('Sponsor collection', '1', '1').send({value: Number(2n * UNIQUE)});
-    const {collectionIdAddress} = await getCollectionAddressFromResult(api, result);
-    const sponsor = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const collectionEvm = evmCollection(web3, owner, collectionIdAddress);
+  itEth('Remove sponsor', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const collectionHelpers = helper.ethNativeContract.collectionHelpers(owner);
+
+    let result = await collectionHelpers.methods.createNonfungibleCollection('Sponsor collection', '1', '1').send({value: Number(2n * nominal)});
+    const collectionIdAddress = helper.ethAddress.normalizeAddress(result.events.CollectionCreated.returnValues.collectionId);
+    const sponsor = await helper.eth.createAccountWithBalance(donor);
+    const collectionEvm = helper.ethNativeContract.collection(collectionIdAddress, 'nft', owner);
 
     expect(await collectionEvm.methods.hasCollectionPendingSponsor().call({from: owner})).to.be.false;
     result = await collectionEvm.methods.setCollectionSponsor(sponsor).send({from: owner});
@@ -80,30 +93,31 @@
     expect(sponsorTuple.field_0).to.be.eq('0x0000000000000000000000000000000000000000');
   });
 
-  itWeb3('Sponsoring collection from evm address via access list', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const collectionHelpers = evmCollectionHelpers(web3, owner);
-    let result = await collectionHelpers.methods.createNonfungibleCollection('Sponsor collection', '1', '1').send({value: Number(2n * UNIQUE)});
-    const {collectionIdAddress, collectionId} = await getCollectionAddressFromResult(api, result);
-    const sponsor = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const collectionEvm = evmCollection(web3, owner, collectionIdAddress);
+  itEth('Sponsoring collection from evm address via access list', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const collectionHelpers = helper.ethNativeContract.collectionHelpers(owner);
+
+    let result = await collectionHelpers.methods.createNonfungibleCollection('Sponsor collection', '1', '1').send({value: Number(2n * nominal)});
+    const collectionIdAddress = helper.ethAddress.normalizeAddress(result.events.CollectionCreated.returnValues.collectionId);
+    const collectionId = helper.ethAddress.extractCollectionId(collectionIdAddress);
+    const collection = helper.nft.getCollectionObject(collectionId);
+    const sponsor = await helper.eth.createAccountWithBalance(donor);
+    const collectionEvm = helper.ethNativeContract.collection(collectionIdAddress, 'nft', owner);
+
     result = await collectionEvm.methods.setCollectionSponsor(sponsor).send({from: owner});
-    let collectionSub = (await getDetailedCollectionInfo(api, collectionId))!;
-    const ss58Format = (api.registry.getChainProperties())!.toJSON().ss58Format;
-    expect(collectionSub.sponsorship.isUnconfirmed).to.be.true;
-    expect(collectionSub.sponsorship.asUnconfirmed.toHuman()).to.be.eq(evmToAddress(sponsor, Number(ss58Format)));
+    let collectionData = (await collection.getData())!;
+    expect(collectionData.raw.sponsorship.Unconfirmed).to.be.eq(helper.address.ethToSubstrate(sponsor, true));
     await expect(collectionEvm.methods.confirmCollectionSponsorship().call()).to.be.rejectedWith('caller is not set as sponsor');
 
     await collectionEvm.methods.confirmCollectionSponsorship().send({from: sponsor});
-    collectionSub = (await getDetailedCollectionInfo(api, collectionId))!;
-    expect(collectionSub.sponsorship.isConfirmed).to.be.true;
-    expect(collectionSub.sponsorship.asConfirmed.toHuman()).to.be.eq(evmToAddress(sponsor, Number(ss58Format)));
+    collectionData = (await collection.getData())!;
+    expect(collectionData.raw.sponsorship.Confirmed).to.be.eq(helper.address.ethToSubstrate(sponsor, true));
 
-    const user = createEthAccount(web3);
+    const user = helper.eth.createAccount();
     const nextTokenId = await collectionEvm.methods.nextTokenId().call();
     expect(nextTokenId).to.be.equal('1');
 
-    const oldPermissions = (await getDetailedCollectionInfo(api, collectionId))!.permissions.toHuman();
+    const oldPermissions = (await collection.getData())!.raw.permissions; // (await getDetailedCollectionInfo(api, collectionId))!.permissions.toHuman();
     expect(oldPermissions.mintMode).to.be.false;
     expect(oldPermissions.access).to.be.equal('Normal');
 
@@ -111,12 +125,12 @@
     await collectionEvm.methods.addToCollectionAllowList(user).send({from: owner});
     await collectionEvm.methods.setCollectionMintMode(true).send({from: owner});
 
-    const newPermissions = (await getDetailedCollectionInfo(api, collectionId))!.permissions.toHuman();
+    const newPermissions = (await collection.getData())!.raw.permissions; // (await getDetailedCollectionInfo(api, collectionId))!.permissions.toHuman();
     expect(newPermissions.mintMode).to.be.true;
     expect(newPermissions.access).to.be.equal('AllowList');
 
-    const ownerBalanceBefore = await ethBalanceViaSub(api, owner);
-    const sponsorBalanceBefore = await ethBalanceViaSub(api, sponsor);
+    const ownerBalanceBefore = await helper.balance.getSubstrate(helper.address.ethToSubstrate(owner));
+    const sponsorBalanceBefore = await helper.balance.getSubstrate(helper.address.ethToSubstrate(sponsor));
 
     {
       const nextTokenId = await collectionEvm.methods.nextTokenId().call();
@@ -126,7 +140,7 @@
         nextTokenId,
         'Test URI',
       ).send({from: user});
-      const events = normalizeEvents(result.events);
+      const events = helper.eth.normalizeEvents(result.events);
 
       expect(events).to.be.deep.equal([
         {
@@ -140,8 +154,8 @@
         },
       ]);
 
-      const ownerBalanceAfter = await ethBalanceViaSub(api, owner);
-      const sponsorBalanceAfter = await ethBalanceViaSub(api, sponsor);
+      const ownerBalanceAfter = await helper.balance.getSubstrate(await helper.address.ethToSubstrate(owner));
+      const sponsorBalanceAfter = await helper.balance.getSubstrate(await helper.address.ethToSubstrate(sponsor));
 
       expect(await collectionEvm.methods.tokenURI(nextTokenId).call()).to.be.equal('Test URI');
       expect(ownerBalanceBefore).to.be.eq(ownerBalanceAfter);
@@ -205,33 +219,34 @@
   //   }
   // });
 
-  itWeb3('Check that transaction via EVM spend money from sponsor address', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const collectionHelpers = evmCollectionHelpers(web3, owner);
-    let result = await collectionHelpers.methods.createNonfungibleCollection('Sponsor collection', '1', '1').send({value: Number(2n * UNIQUE)});
-    const {collectionIdAddress, collectionId} = await getCollectionAddressFromResult(api, result);
-    const sponsor = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const collectionEvm = evmCollection(web3, owner, collectionIdAddress);
+  itEth('Check that transaction via EVM spend money from sponsor address', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const collectionHelpers = helper.ethNativeContract.collectionHelpers(owner);
+
+    let result = await collectionHelpers.methods.createNonfungibleCollection('Sponsor collection', '1', '1').send({value: Number(2n * nominal)});
+    const collectionIdAddress = helper.ethAddress.normalizeAddress(result.events.CollectionCreated.returnValues.collectionId);
+    const collectionId = helper.ethAddress.extractCollectionId(collectionIdAddress);
+    const collection = helper.nft.getCollectionObject(collectionId);
+    const sponsor = await helper.eth.createAccountWithBalance(donor);
+    const collectionEvm = helper.ethNativeContract.collection(collectionIdAddress, 'nft', owner);
+
     result = await collectionEvm.methods.setCollectionSponsor(sponsor).send();
-    let collectionSub = (await getDetailedCollectionInfo(api, collectionId))!;
-    const ss58Format = (api.registry.getChainProperties())!.toJSON().ss58Format;
-    expect(collectionSub.sponsorship.isUnconfirmed).to.be.true;
-    expect(collectionSub.sponsorship.asUnconfirmed.toHuman()).to.be.eq(evmToAddress(sponsor, Number(ss58Format)));
+    let collectionData = (await collection.getData())!;
+    expect(collectionData.raw.sponsorship.Unconfirmed).to.be.eq(helper.address.ethToSubstrate(sponsor, true));
     await expect(collectionEvm.methods.confirmCollectionSponsorship().call()).to.be.rejectedWith('caller is not set as sponsor');
-    const sponsorCollection = evmCollection(web3, sponsor, collectionIdAddress);
+
+    const sponsorCollection = helper.ethNativeContract.collection(collectionIdAddress, 'nft', sponsor);
     await sponsorCollection.methods.confirmCollectionSponsorship().send();
-    collectionSub = (await getDetailedCollectionInfo(api, collectionId))!;
-    expect(collectionSub.sponsorship.isConfirmed).to.be.true;
-    expect(collectionSub.sponsorship.asConfirmed.toHuman()).to.be.eq(evmToAddress(sponsor, Number(ss58Format)));
+    collectionData = (await collection.getData())!;
+    expect(collectionData.raw.sponsorship.Confirmed).to.be.eq(helper.address.ethToSubstrate(sponsor, true));
 
-    const user = createEthAccount(web3);
+    const user = helper.eth.createAccount();
     await collectionEvm.methods.addCollectionAdmin(user).send();
     
-    const ownerBalanceBefore = await ethBalanceViaSub(api, owner);
-    const sponsorBalanceBefore = await ethBalanceViaSub(api, sponsor);
-    
-  
-    const userCollectionEvm = evmCollection(web3, user, collectionIdAddress);
+    const ownerBalanceBefore = await helper.balance.getSubstrate(helper.address.ethToSubstrate(owner));
+    const sponsorBalanceBefore = await helper.balance.getSubstrate(helper.address.ethToSubstrate(sponsor));
+
+    const userCollectionEvm = helper.ethNativeContract.collection(collectionIdAddress, 'nft', user);
     const nextTokenId = await userCollectionEvm.methods.nextTokenId().call();
     expect(nextTokenId).to.be.equal('1');
     result = await userCollectionEvm.methods.mintWithTokenURI(
@@ -240,8 +255,8 @@
       'Test URI',
     ).send();
 
-    const events = normalizeEvents(result.events);
-    const address = collectionIdToAddress(collectionId);
+    const events = helper.eth.normalizeEvents(result.events);
+    const address = helper.ethAddress.fromCollectionId(collectionId);
 
     expect(events).to.be.deep.equal([
       {
@@ -256,9 +271,9 @@
     ]);
     expect(await userCollectionEvm.methods.tokenURI(nextTokenId).call()).to.be.equal('Test URI');
   
-    const ownerBalanceAfter = await ethBalanceViaSub(api, owner);
+    const ownerBalanceAfter = await helper.balance.getSubstrate(helper.address.ethToSubstrate(owner));
     expect(ownerBalanceAfter).to.be.eq(ownerBalanceBefore);
-    const sponsorBalanceAfter = await ethBalanceViaSub(api, sponsor);
+    const sponsorBalanceAfter = await helper.balance.getSubstrate(helper.address.ethToSubstrate(sponsor));
     expect(sponsorBalanceAfter < sponsorBalanceBefore).to.be.true;
   });
 });

--- a/tests/src/eth/contractSponsoring.test.ts
+++ b/tests/src/eth/contractSponsoring.test.ts
@@ -14,45 +14,39 @@
 // 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 {IKeyringPair} from '@polkadot/types/types';
 import * as solc from 'solc';
-import {expect} from 'chai';
-import {expectSubstrateEventsAtBlock} from '../util/helpers';
-import Web3 from 'web3';
+import {EthUniqueHelper} from './util/playgrounds/unique.dev';
+import {itEth, expect, SponsoringMode, usingEthPlaygrounds} from '../eth/util/playgrounds';
+import {usingPlaygrounds} from '../util/playgrounds';
+import {CompiledContract} from './util/playgrounds/types';
 
-import {
-  contractHelpers,
-  createEthAccountWithBalance,
-  transferBalanceToEth,
-  deployFlipper,
-  itWeb3,
-  SponsoringMode,
-  createEthAccount,
-  ethBalanceViaSub,
-  normalizeEvents,
-  CompiledContract,
-  GAS_ARGS,
-  subToEth,
-} from './util/helpers';
-import {submitTransactionAsync} from '../substrate/substrate-api';
+describe('Sponsoring EVM contracts', () => {
+  let donor: IKeyringPair;
+
+  before(async () => {
+    await usingPlaygrounds(async (_helper, privateKey) => {
+      donor = privateKey('//Alice');
+    });
+  });
+
+  itEth('Self sponsored can be set by the address that deployed the contract', async ({helper, privateKey}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const flipper = await helper.eth.deployFlipper(owner);
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
 
-describe('Sponsoring EVM contracts', () => {
-  itWeb3('Self sponsored can be set by the address that deployed the contract', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const flipper = await deployFlipper(web3, owner);
-    const helpers = contractHelpers(web3, owner);
     expect(await helpers.methods.hasSponsor(flipper.options.address).call()).to.be.false;
     await expect(helpers.methods.selfSponsoredEnable(flipper.options.address).send()).to.be.not.rejected;
     expect(await helpers.methods.hasSponsor(flipper.options.address).call()).to.be.true;
   });
 
-  itWeb3('Set self sponsored events', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const flipper = await deployFlipper(web3, owner);
-    const helpers = contractHelpers(web3, owner);
+  itEth('Set self sponsored events', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const flipper = await helper.eth.deployFlipper(owner);
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
     
     const result = await helpers.methods.selfSponsoredEnable(flipper.options.address).send();
-    // console.log(result);
-    const ethEvents = normalizeEvents(result.events);
+    const ethEvents = helper.eth.helper.eth.normalizeEvents(result.events);
     expect(ethEvents).to.be.deep.equal([
       {
         address: flipper.options.address,
@@ -71,62 +65,59 @@
         },
       },
     ]);
-
-    await expectSubstrateEventsAtBlock(
-      api, 
-      result.blockNumber,
-      'evmContractHelpers',
-      ['ContractSponsorSet','ContractSponsorshipConfirmed'],
-    );
   });
 
-  itWeb3('Self sponsored can not be set by the address that did not deployed the contract', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const notOwner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const flipper = await deployFlipper(web3, owner);
-    const helpers = contractHelpers(web3, owner);
+  itEth('Self sponsored can not be set by the address that did not deployed the contract', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const notOwner = await helper.eth.createAccountWithBalance(donor);
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
+    const flipper = await helper.eth.deployFlipper(owner);
+
     expect(await helpers.methods.hasSponsor(flipper.options.address).call()).to.be.false;
     await expect(helpers.methods.selfSponsoredEnable(flipper.options.address).call({from: notOwner})).to.be.rejectedWith('NoPermission');
     expect(await helpers.methods.hasSponsor(flipper.options.address).call()).to.be.false;
   });
 
-  itWeb3('Sponsoring can be set by the address that has deployed the contract', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const flipper = await deployFlipper(web3, owner);
-    const helpers = contractHelpers(web3, owner);
+  itEth('Sponsoring can be set by the address that has deployed the contract', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
+    const flipper = await helper.eth.deployFlipper(owner);
+
     expect(await helpers.methods.sponsoringEnabled(flipper.options.address).call()).to.be.false;
     await expect(helpers.methods.setSponsoringMode(flipper.options.address, SponsoringMode.Allowlisted).send({from: owner})).to.be.not.rejected;
     expect(await helpers.methods.sponsoringEnabled(flipper.options.address).call()).to.be.true;
   });
 
-  itWeb3('Sponsoring cannot be set by the address that did not deployed the contract', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const notOwner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const flipper = await deployFlipper(web3, owner);
-    const helpers = contractHelpers(web3, owner);
+  itEth('Sponsoring cannot be set by the address that did not deployed the contract', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const notOwner = await helper.eth.createAccountWithBalance(donor);
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
+    const flipper = await helper.eth.deployFlipper(owner);
+
     expect(await helpers.methods.sponsoringEnabled(flipper.options.address).call()).to.be.false;
     await expect(helpers.methods.setSponsoringMode(notOwner, SponsoringMode.Allowlisted).call({from: notOwner})).to.be.rejectedWith('NoPermission');
     expect(await helpers.methods.sponsoringEnabled(flipper.options.address).call()).to.be.false;
   });
   
-  itWeb3('Sponsor can be set by the address that deployed the contract', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const sponsor = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const flipper = await deployFlipper(web3, owner);
-    const helpers = contractHelpers(web3, owner);
+  itEth('Sponsor can be set by the address that deployed the contract', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const sponsor = await helper.eth.createAccountWithBalance(donor);
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
+    const flipper = await helper.eth.deployFlipper(owner);
+
     expect(await helpers.methods.hasPendingSponsor(flipper.options.address).call()).to.be.false;
     await expect(helpers.methods.setSponsor(flipper.options.address, sponsor).send()).to.be.not.rejected;
     expect(await helpers.methods.hasPendingSponsor(flipper.options.address).call()).to.be.true;
   });
   
-  itWeb3('Set sponsor event', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const sponsor = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const flipper = await deployFlipper(web3, owner);
-    const helpers = contractHelpers(web3, owner);
+  itEth('Set sponsor event', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const sponsor = await helper.eth.createAccountWithBalance(donor);
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
+    const flipper = await helper.eth.deployFlipper(owner);
     
     const result = await helpers.methods.setSponsor(flipper.options.address, sponsor).send();
-    const events = normalizeEvents(result.events);
+    const events = helper.eth.normalizeEvents(result.events);
     expect(events).to.be.deep.equal([
       {
         address: flipper.options.address,
@@ -137,45 +128,41 @@
         },
       },
     ]);
-
-    await expectSubstrateEventsAtBlock(
-      api, 
-      result.blockNumber,
-      'evmContractHelpers',
-      ['ContractSponsorSet'],
-    );
   });
   
-  itWeb3('Sponsor can not be set by the address that did not deployed the contract', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const sponsor = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const notOwner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const flipper = await deployFlipper(web3, owner);
-    const helpers = contractHelpers(web3, owner);
+  itEth('Sponsor can not be set by the address that did not deployed the contract', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const sponsor = await helper.eth.createAccountWithBalance(donor);
+    const notOwner = await helper.eth.createAccountWithBalance(donor);
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
+    const flipper = await helper.eth.deployFlipper(owner);
+
     expect(await helpers.methods.hasPendingSponsor(flipper.options.address).call()).to.be.false;
     await expect(helpers.methods.setSponsor(flipper.options.address, sponsor).call({from: notOwner})).to.be.rejectedWith('NoPermission');
     expect(await helpers.methods.hasPendingSponsor(flipper.options.address).call()).to.be.false;
   });
 
-  itWeb3('Sponsorship can be confirmed by the address that pending as sponsor', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const sponsor = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const flipper = await deployFlipper(web3, owner);
-    const helpers = contractHelpers(web3, owner);
+  itEth('Sponsorship can be confirmed by the address that pending as sponsor', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const sponsor = await helper.eth.createAccountWithBalance(donor);
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
+    const flipper = await helper.eth.deployFlipper(owner);
+
     expect(await helpers.methods.hasSponsor(flipper.options.address).call()).to.be.false;
     await expect(helpers.methods.setSponsor(flipper.options.address, sponsor).send()).to.be.not.rejected;
     await expect(helpers.methods.confirmSponsorship(flipper.options.address).send({from: sponsor})).to.be.not.rejected;
     expect(await helpers.methods.hasSponsor(flipper.options.address).call()).to.be.true;
   });
 
-  itWeb3('Confirm sponsorship event', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const sponsor = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const flipper = await deployFlipper(web3, owner);
-    const helpers = contractHelpers(web3, owner);
+  itEth('Confirm sponsorship event', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const sponsor = await helper.eth.createAccountWithBalance(donor);
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
+    const flipper = await helper.eth.deployFlipper(owner);
+
     await expect(helpers.methods.setSponsor(flipper.options.address, sponsor).send()).to.be.not.rejected;
     const result = await helpers.methods.confirmSponsorship(flipper.options.address).send({from: sponsor});
-    const events = normalizeEvents(result.events);
+    const events = helper.eth.normalizeEvents(result.events);
     expect(events).to.be.deep.equal([
       {
         address: flipper.options.address,
@@ -186,41 +173,37 @@
         },
       },
     ]);
+  });
 
-    await expectSubstrateEventsAtBlock(
-      api, 
-      result.blockNumber,
-      'evmContractHelpers',
-      ['ContractSponsorshipConfirmed'],
-    );
-  });
+  itEth('Sponsorship can not be confirmed by the address that not pending as sponsor', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const sponsor = await helper.eth.createAccountWithBalance(donor);
+    const notSponsor = await helper.eth.createAccountWithBalance(donor);
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
+    const flipper = await helper.eth.deployFlipper(owner);
 
-  itWeb3('Sponsorship can not be confirmed by the address that not pending as sponsor', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const sponsor = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const notSponsor = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const flipper = await deployFlipper(web3, owner);
-    const helpers = contractHelpers(web3, owner);
     expect(await helpers.methods.hasSponsor(flipper.options.address).call()).to.be.false;
     await expect(helpers.methods.setSponsor(flipper.options.address, sponsor).send()).to.be.not.rejected;
     await expect(helpers.methods.confirmSponsorship(flipper.options.address).call({from: notSponsor})).to.be.rejectedWith('NoPermission');
     expect(await helpers.methods.hasSponsor(flipper.options.address).call()).to.be.false;
   });
 
-  itWeb3('Sponsorship can not be confirmed by the address that not set as sponsor', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const notSponsor = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const flipper = await deployFlipper(web3, owner);
-    const helpers = contractHelpers(web3, owner);
+  itEth('Sponsorship can not be confirmed by the address that not set as sponsor', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const notSponsor = await helper.eth.createAccountWithBalance(donor);
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
+    const flipper = await helper.eth.deployFlipper(owner);
+
     expect(await helpers.methods.hasSponsor(flipper.options.address).call()).to.be.false;
     await expect(helpers.methods.confirmSponsorship(flipper.options.address).call({from: notSponsor})).to.be.rejectedWith('NoPendingSponsor');
     expect(await helpers.methods.hasSponsor(flipper.options.address).call()).to.be.false;
   });
 
-  itWeb3('Get self sponsored sponsor', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const flipper = await deployFlipper(web3, owner);
-    const helpers = contractHelpers(web3, owner);
+  itEth('Get self sponsored sponsor', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
+    const flipper = await helper.eth.deployFlipper(owner);
+
     await helpers.methods.selfSponsoredEnable(flipper.options.address).send();
     
     const result = await helpers.methods.sponsor(flipper.options.address).call();
@@ -229,11 +212,12 @@
     expect(result[1]).to.be.eq('0');
   });
 
-  itWeb3('Get confirmed sponsor', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const sponsor = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const flipper = await deployFlipper(web3, owner);
-    const helpers = contractHelpers(web3, owner);
+  itEth('Get confirmed sponsor', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const sponsor = await helper.eth.createAccountWithBalance(donor);
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
+    const flipper = await helper.eth.deployFlipper(owner);
+
     await helpers.methods.setSponsor(flipper.options.address, sponsor).send();
     await helpers.methods.confirmSponsorship(flipper.options.address).send({from: sponsor});
     
@@ -243,11 +227,11 @@
     expect(result[1]).to.be.eq('0');
   });
 
-  itWeb3('Sponsor can be removed by the address that deployed the contract', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const sponsor = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const flipper = await deployFlipper(web3, owner);
-    const helpers = contractHelpers(web3, owner);
+  itEth('Sponsor can be removed by the address that deployed the contract', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const sponsor = await helper.eth.createAccountWithBalance(donor);
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
+    const flipper = await helper.eth.deployFlipper(owner);
 
     expect(await helpers.methods.hasSponsor(flipper.options.address).call()).to.be.false;
     await helpers.methods.setSponsor(flipper.options.address, sponsor).send();
@@ -258,17 +242,17 @@
     expect(await helpers.methods.hasSponsor(flipper.options.address).call()).to.be.false;
   });
 
-  itWeb3('Remove sponsor event', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const sponsor = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const flipper = await deployFlipper(web3, owner);
-    const helpers = contractHelpers(web3, owner);
+  itEth('Remove sponsor event', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const sponsor = await helper.eth.createAccountWithBalance(donor);
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
+    const flipper = await helper.eth.deployFlipper(owner);
 
     await helpers.methods.setSponsor(flipper.options.address, sponsor).send();
     await helpers.methods.confirmSponsorship(flipper.options.address).send({from: sponsor});
     
     const result = await helpers.methods.removeSponsor(flipper.options.address).send();
-    const events = normalizeEvents(result.events);
+    const events = helper.eth.normalizeEvents(result.events);
     expect(events).to.be.deep.equal([
       {
         address: flipper.options.address,
@@ -278,21 +262,14 @@
         },
       },
     ]);
-
-    await expectSubstrateEventsAtBlock(
-      api, 
-      result.blockNumber,
-      'evmContractHelpers',
-      ['ContractSponsorRemoved'],
-    );
   });
 
-  itWeb3('Sponsor can not be removed by the address that did not deployed the contract', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const notOwner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const sponsor = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const flipper = await deployFlipper(web3, owner);
-    const helpers = contractHelpers(web3, owner);
+  itEth('Sponsor can not be removed by the address that did not deployed the contract', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const notOwner = await helper.eth.createAccountWithBalance(donor);
+    const sponsor = await helper.eth.createAccountWithBalance(donor);
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
+    const flipper = await helper.eth.deployFlipper(owner);
 
     expect(await helpers.methods.hasSponsor(flipper.options.address).call()).to.be.false;
     await helpers.methods.setSponsor(flipper.options.address, sponsor).send();
@@ -303,14 +280,12 @@
     expect(await helpers.methods.hasSponsor(flipper.options.address).call()).to.be.true;
   });
 
-  itWeb3('In generous mode, non-allowlisted user transaction will be sponsored', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const sponsor = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-
-    const flipper = await deployFlipper(web3, owner);
-
-    const helpers = contractHelpers(web3, owner);
+  itEth('In generous mode, non-allowlisted user transaction will be sponsored', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const sponsor = await helper.eth.createAccountWithBalance(donor);
+    const caller = await helper.eth.createAccountWithBalance(donor);
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
+    const flipper = await helper.eth.deployFlipper(owner);
 
     await helpers.methods.setSponsor(flipper.options.address, sponsor).send();
     await helpers.methods.confirmSponsorship(flipper.options.address).send({from: sponsor});
@@ -318,57 +293,52 @@
     await helpers.methods.setSponsoringMode(flipper.options.address, SponsoringMode.Generous).send({from: owner});
     await helpers.methods.setSponsoringRateLimit(flipper.options.address, 0).send({from: owner});
 
-    const sponsorBalanceBefore = await ethBalanceViaSub(api, sponsor);
-    const callerBalanceBefore = await ethBalanceViaSub(api, caller);
+    const sponsorBalanceBefore = await helper.balance.getSubstrate(await helper.address.ethToSubstrate(sponsor));
+    const callerBalanceBefore = await helper.balance.getSubstrate(await helper.address.ethToSubstrate(caller));
 
     await flipper.methods.flip().send({from: caller});
     expect(await flipper.methods.getValue().call()).to.be.true;
 
     // Balance should be taken from sponsor instead of caller
-    const sponsorBalanceAfter = await ethBalanceViaSub(api, sponsor);
-    const callerBalanceAfter = await ethBalanceViaSub(api, caller);
+    const sponsorBalanceAfter = await helper.balance.getSubstrate(await helper.address.ethToSubstrate(sponsor));
+    const callerBalanceAfter = await helper.balance.getSubstrate(await helper.address.ethToSubstrate(caller));
     expect(sponsorBalanceAfter < sponsorBalanceBefore).to.be.true;
     expect(callerBalanceAfter).to.be.eq(callerBalanceBefore);
   });
-
-  itWeb3('In generous mode, non-allowlisted user transaction will be self sponsored', async ({api, web3, privateKeyWrapper}) => {
-    const alice = privateKeyWrapper('//Alice');
-
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-
-    const flipper = await deployFlipper(web3, owner);
 
-    const helpers = contractHelpers(web3, owner);
+  itEth('In generous mode, non-allowlisted user transaction will be self sponsored', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const caller = await helper.eth.createAccountWithBalance(donor);
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
+    const flipper = await helper.eth.deployFlipper(owner);
 
     await helpers.methods.selfSponsoredEnable(flipper.options.address).send();
 
     await helpers.methods.setSponsoringMode(flipper.options.address, SponsoringMode.Generous).send({from: owner});
     await helpers.methods.setSponsoringRateLimit(flipper.options.address, 0).send({from: owner});
 
-    await transferBalanceToEth(api, alice, flipper.options.address);
+    await helper.eth.transferBalanceFromSubstrate(donor, flipper.options.address);
 
-    const contractBalanceBefore = await ethBalanceViaSub(api, flipper.options.address);
-    const callerBalanceBefore = await ethBalanceViaSub(api, caller);
+    const contractBalanceBefore = await helper.balance.getSubstrate(await helper.address.ethToSubstrate(flipper.options.address));
+    const callerBalanceBefore = await helper.balance.getSubstrate(await helper.address.ethToSubstrate(caller));
 
     await flipper.methods.flip().send({from: caller});
     expect(await flipper.methods.getValue().call()).to.be.true;
 
     // Balance should be taken from sponsor instead of caller
-    const contractBalanceAfter = await ethBalanceViaSub(api, flipper.options.address);
-    const callerBalanceAfter = await ethBalanceViaSub(api, caller);
+    const contractBalanceAfter = await helper.balance.getSubstrate(await helper.address.ethToSubstrate(flipper.options.address));
+    const callerBalanceAfter = await helper.balance.getSubstrate(await helper.address.ethToSubstrate(caller));
     expect(contractBalanceAfter < contractBalanceBefore).to.be.true;
     expect(callerBalanceAfter).to.be.eq(callerBalanceBefore);
   });
 
-  itWeb3('Sponsoring is set, an address that has no UNQ can send a transaction and it works. Sponsor balance should decrease (allowlisted)', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const sponsor = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const caller = createEthAccount(web3);
-
-    const flipper = await deployFlipper(web3, owner);
+  itEth('Sponsoring is set, an address that has no UNQ can send a transaction and it works. Sponsor balance should decrease (allowlisted)', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const sponsor = await helper.eth.createAccountWithBalance(donor);
+    const caller = helper.eth.createAccount();
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
+    const flipper = await helper.eth.deployFlipper(owner);
 
-    const helpers = contractHelpers(web3, owner);
     await helpers.methods.toggleAllowlist(flipper.options.address, true).send({from: owner});
     await helpers.methods.toggleAllowed(flipper.options.address, caller, true).send({from: owner});
 
@@ -378,51 +348,47 @@
     await helpers.methods.setSponsor(flipper.options.address, sponsor).send();
     await helpers.methods.confirmSponsorship(flipper.options.address).send({from: sponsor});
 
-    const sponsorBalanceBefore = await ethBalanceViaSub(api, sponsor);
+    const sponsorBalanceBefore = await helper.balance.getSubstrate(await helper.address.ethToSubstrate(sponsor));
     expect(sponsorBalanceBefore).to.be.not.equal('0');
 
     await flipper.methods.flip().send({from: caller});
     expect(await flipper.methods.getValue().call()).to.be.true;
 
     // Balance should be taken from flipper instead of caller
-    const sponsorBalanceAfter = await ethBalanceViaSub(api, sponsor);
+    const sponsorBalanceAfter = await helper.balance.getSubstrate(await helper.address.ethToSubstrate(sponsor));
     expect(sponsorBalanceAfter < sponsorBalanceBefore).to.be.true;
   });
 
-  itWeb3('Sponsoring is set, an address that has no UNQ can send a transaction and it works. Sponsor balance should not decrease (non-allowlisted)', async ({api, web3, privateKeyWrapper}) => {
-    const alice = privateKeyWrapper('//Alice');
-
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const caller = createEthAccount(web3);
-
-    const flipper = await deployFlipper(web3, owner);
+  itEth('Sponsoring is set, an address that has no UNQ can send a transaction and it works. Sponsor balance should not decrease (non-allowlisted)', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const caller = await helper.eth.createAccount();
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
+    const flipper = await helper.eth.deployFlipper(owner);
 
-    const helpers = contractHelpers(web3, owner);
-
     await helpers.methods.setSponsoringMode(flipper.options.address, SponsoringMode.Allowlisted).send({from: owner});
     await helpers.methods.setSponsoringRateLimit(flipper.options.address, 0).send({from: owner});
 
-    await transferBalanceToEth(api, alice, flipper.options.address);
+    await helper.eth.transferBalanceFromSubstrate(donor, flipper.options.address);
 
-    const originalFlipperBalance = await web3.eth.getBalance(flipper.options.address);
+    const originalFlipperBalance = await helper.balance.getEthereum(flipper.options.address);
     expect(originalFlipperBalance).to.be.not.equal('0');
 
     await expect(flipper.methods.flip().send({from: caller})).to.be.rejectedWith(/InvalidTransaction::Payment/);
     expect(await flipper.methods.getValue().call()).to.be.false;
 
     // Balance should be taken from flipper instead of caller
-    const balanceAfter = await web3.eth.getBalance(flipper.options.address);
-    expect(+balanceAfter).to.be.equals(+originalFlipperBalance);
+    // FIXME the comment is wrong! What check should be here?
+    const balanceAfter = await helper.balance.getEthereum(flipper.options.address);
+    expect(balanceAfter).to.be.equals(originalFlipperBalance);
   });
 
-  itWeb3('Sponsoring is set, an address that has UNQ can send a transaction and it works. User balance should not change', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const sponsor = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-
-    const flipper = await deployFlipper(web3, owner);
+  itEth('Sponsoring is set, an address that has UNQ can send a transaction and it works. User balance should not change', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const sponsor = await helper.eth.createAccountWithBalance(donor);
+    const caller = await helper.eth.createAccountWithBalance(donor);
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
+    const flipper = await helper.eth.deployFlipper(owner);
 
-    const helpers = contractHelpers(web3, owner);
     await helpers.methods.toggleAllowlist(flipper.options.address, true).send({from: owner});
     await helpers.methods.toggleAllowed(flipper.options.address, caller, true).send({from: owner});
 
@@ -432,27 +398,26 @@
     await helpers.methods.setSponsor(flipper.options.address, sponsor).send();
     await helpers.methods.confirmSponsorship(flipper.options.address).send({from: sponsor});
 
-    const sponsorBalanceBefore = await ethBalanceViaSub(api, sponsor);
-    const callerBalanceBefore = await ethBalanceViaSub(api, caller);
+    const sponsorBalanceBefore = await helper.balance.getSubstrate(await helper.address.ethToSubstrate(sponsor));
+    const callerBalanceBefore = await helper.balance.getSubstrate(await helper.address.ethToSubstrate(caller));
 
     await flipper.methods.flip().send({from: caller});
     expect(await flipper.methods.getValue().call()).to.be.true;
 
-    const sponsorBalanceAfter = await ethBalanceViaSub(api, sponsor);
-    const callerBalanceAfter = await ethBalanceViaSub(api, caller);
+    const sponsorBalanceAfter = await helper.balance.getSubstrate(await helper.address.ethToSubstrate(sponsor));
+    const callerBalanceAfter = await helper.balance.getSubstrate(await helper.address.ethToSubstrate(caller));
     expect(sponsorBalanceAfter < sponsorBalanceBefore).to.be.true;
     expect(callerBalanceAfter).to.be.equals(callerBalanceBefore);
   });
 
-  itWeb3('Sponsoring is limited, with setContractRateLimit. The limitation is working if transactions are sent more often, the sender pays the commission.', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const sponsor = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const originalCallerBalance = await web3.eth.getBalance(caller);
-
-    const flipper = await deployFlipper(web3, owner);
-
-    const helpers = contractHelpers(web3, owner);
+  itEth('Sponsoring is limited, with setContractRateLimit. The limitation is working if transactions are sent more often, the sender pays the commission.', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const sponsor = await helper.eth.createAccountWithBalance(donor);
+    const caller = await helper.eth.createAccountWithBalance(donor);
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
+    const flipper = await helper.eth.deployFlipper(owner);
+    
+    const originalCallerBalance = await helper.balance.getEthereum(caller);
     await helpers.methods.toggleAllowlist(flipper.options.address, true).send({from: owner});
     await helpers.methods.toggleAllowed(flipper.options.address, caller, true).send({from: owner});
 
@@ -462,34 +427,36 @@
     await helpers.methods.setSponsor(flipper.options.address, sponsor).send();
     await helpers.methods.confirmSponsorship(flipper.options.address).send({from: sponsor});
 
-    const originalFlipperBalance = await web3.eth.getBalance(sponsor);
+    const originalFlipperBalance = await helper.balance.getEthereum(sponsor);
     expect(originalFlipperBalance).to.be.not.equal('0');
 
     await flipper.methods.flip().send({from: caller});
     expect(await flipper.methods.getValue().call()).to.be.true;
-    expect(await web3.eth.getBalance(caller)).to.be.equals(originalCallerBalance);
+    expect(await helper.balance.getEthereum(caller)).to.be.equals(originalCallerBalance);
 
-    const newFlipperBalance = await web3.eth.getBalance(sponsor);
+    const newFlipperBalance = await helper.balance.getEthereum(sponsor);
     expect(newFlipperBalance).to.be.not.equals(originalFlipperBalance);
 
     await flipper.methods.flip().send({from: caller});
-    expect(await web3.eth.getBalance(sponsor)).to.be.equal(newFlipperBalance);
-    expect(await web3.eth.getBalance(caller)).to.be.not.equals(originalCallerBalance);
+    expect(await helper.balance.getEthereum(sponsor)).to.be.equal(newFlipperBalance);
+    expect(await helper.balance.getEthereum(caller)).to.be.not.equals(originalCallerBalance);
   });
 
   // TODO: Find a way to calculate default rate limit
-  itWeb3('Default rate limit equals 7200', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const flipper = await deployFlipper(web3, owner);
-    const helpers = contractHelpers(web3, owner);
+  itEth('Default rate limit equals 7200', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
+    const flipper = await helper.eth.deployFlipper(owner);
+
     expect(await helpers.methods.sponsoringRateLimit(flipper.options.address).call()).to.be.equals('7200');
   });
 });
 
 describe('Sponsoring Fee Limit', () => {
+  let donor: IKeyringPair;
+  let alice: IKeyringPair;
+  let DEFAULT_GAS: number;
 
-  let testContract: CompiledContract;
-  
   function compileTestContract() {
     if (!testContract) {
       const input = {
@@ -537,46 +504,67 @@
     return testContract;
   }
   
-  async function deployTestContract(web3: Web3, owner: string) {
+  async function deployTestContract(helper: EthUniqueHelper, owner: string) {
+    const web3 = helper.getWeb3();
     const compiled = compileTestContract();
     const testContract = new web3.eth.Contract(compiled.abi, undefined, {
       data: compiled.object,
       from: owner,
-      ...GAS_ARGS,
+      gas: DEFAULT_GAS,
     });
     return await testContract.deploy({data: compiled.object}).send({from: owner});
   }
 
-  itWeb3('Default fee limit', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const flipper = await deployFlipper(web3, owner);
-    const helpers = contractHelpers(web3, owner);
+  before(async () => {
+    await usingEthPlaygrounds(async (helper, privateKey) => {
+      donor = privateKey('//Alice');
+      DEFAULT_GAS = helper.eth.DEFAULT_GAS;
+    });
+  });
+
+  beforeEach(async () => {
+    await usingPlaygrounds(async (helper) => {
+      [alice] = await helper.arrange.createAccounts([1000n], donor);
+    });
+  });
+
+  let testContract: CompiledContract;
+  
+
+
+  itEth('Default fee limit', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
+    const flipper = await helper.eth.deployFlipper(owner);
+
     expect(await helpers.methods.sponsoringFeeLimit(flipper.options.address).call()).to.be.equals('115792089237316195423570985008687907853269984665640564039457584007913129639935');
   });
 
-  itWeb3('Set fee limit', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const flipper = await deployFlipper(web3, owner);
-    const helpers = contractHelpers(web3, owner);
+  itEth('Set fee limit', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
+    const flipper = await helper.eth.deployFlipper(owner);
+
     await helpers.methods.setSponsoringFeeLimit(flipper.options.address, 100).send();
     expect(await helpers.methods.sponsoringFeeLimit(flipper.options.address).call()).to.be.equals('100');
   });
 
-  itWeb3('Negative test - set fee limit by non-owner', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const stranger = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const flipper = await deployFlipper(web3, owner);
-    const helpers = contractHelpers(web3, owner);
+  itEth('Negative test - set fee limit by non-owner', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const stranger = await helper.eth.createAccountWithBalance(donor);
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
+    const flipper = await helper.eth.deployFlipper(owner);
+
     await expect(helpers.methods.setSponsoringFeeLimit(flipper.options.address, 100).send({from: stranger})).to.be.rejected;
   });
 
-  itWeb3('Negative test - check that eth transactions exceeding fee limit are not executed', async ({api, web3, privateKeyWrapper}) => {
-    const sponsor = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const user = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
+  itEth('Negative test - check that eth transactions exceeding fee limit are not executed', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const sponsor = await helper.eth.createAccountWithBalance(donor);
+    const user = await helper.eth.createAccountWithBalance(donor);
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
 
-    const testContract = await deployTestContract(web3, owner);
-    const helpers = contractHelpers(web3, owner);
+    const testContract = await deployTestContract(helper, owner);
     
     await helpers.methods.setSponsoringMode(testContract.options.address, SponsoringMode.Generous).send({from: owner});
     await helpers.methods.setSponsoringRateLimit(testContract.options.address, 0).send({from: owner});
@@ -584,24 +572,24 @@
     await helpers.methods.setSponsor(testContract.options.address, sponsor).send();
     await helpers.methods.confirmSponsorship(testContract.options.address).send({from: sponsor});
 
-    const gasPrice = BigInt(await web3.eth.getGasPrice());
+    const gasPrice = BigInt(await helper.getWeb3().eth.getGasPrice());
 
     await helpers.methods.setSponsoringFeeLimit(testContract.options.address, 2_000_000n * gasPrice).send();
 
-    const originalUserBalance = await web3.eth.getBalance(user);
+    const originalUserBalance = await helper.balance.getEthereum(user);
     await testContract.methods.test(100).send({from: user, gas: 2_000_000});
-    expect(await web3.eth.getBalance(user)).to.be.equal(originalUserBalance);
+    expect(await helper.balance.getEthereum(user)).to.be.equal(originalUserBalance);
 
     await testContract.methods.test(100).send({from: user, gas: 2_100_000});
-    expect(await web3.eth.getBalance(user)).to.not.be.equal(originalUserBalance);
+    expect(await helper.balance.getEthereum(user)).to.not.be.equal(originalUserBalance);
   });
 
-  itWeb3('Negative test - check that evm.call transactions exceeding fee limit are not executed', async ({api, web3, privateKeyWrapper}) => {
-    const sponsor = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
+  itEth('Negative test - check that evm.call transactions exceeding fee limit are not executed', async ({helper, privateKey}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const sponsor = await helper.eth.createAccountWithBalance(donor);
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
 
-    const testContract = await deployTestContract(web3, owner);
-    const helpers = contractHelpers(web3, owner);
+    const testContract = await deployTestContract(helper, owner);
     
     await helpers.methods.setSponsoringMode(testContract.options.address, SponsoringMode.Generous).send({from: owner});
     await helpers.methods.setSponsoringRateLimit(testContract.options.address, 0).send({from: owner});
@@ -609,43 +597,29 @@
     await helpers.methods.setSponsor(testContract.options.address, sponsor).send();
     await helpers.methods.confirmSponsorship(testContract.options.address).send({from: sponsor});
 
-    const gasPrice = BigInt(await web3.eth.getGasPrice());
+    const gasPrice = BigInt(await helper.getWeb3().eth.getGasPrice());
 
     await helpers.methods.setSponsoringFeeLimit(testContract.options.address, 2_000_000n * gasPrice).send();
 
-    const alice = privateKeyWrapper('//Alice');
-    const originalAliceBalance = (await api.query.system.account(alice.address)).data.free.toBigInt();
-    
-    await submitTransactionAsync(
+    const originalAliceBalance = await helper.balance.getSubstrate(alice.address);
+
+    await helper.eth.sendEVM(
       alice,
-      api.tx.evm.call(
-        subToEth(alice.address),
-        testContract.options.address,
-        testContract.methods.test(100).encodeABI(),
-        Uint8Array.from([]),
-        2_000_000n,
-        gasPrice,
-        null,
-        null,
-        [],
-      ),
+      testContract.options.address,
+      testContract.methods.test(100).encodeABI(),
+      '0',
+      2_000_000,
     );
-    expect((await api.query.system.account(alice.address)).data.free.toBigInt()).to.be.equal(originalAliceBalance);
+    // expect((await api.query.system.account(alice.address)).data.free.toBigInt()).to.be.equal(originalAliceBalance);
+    expect(await helper.balance.getSubstrate(alice.address)).to.be.equal(originalAliceBalance);
     
-    await submitTransactionAsync(
+    await helper.eth.sendEVM(
       alice,
-      api.tx.evm.call(
-        subToEth(alice.address),
-        testContract.options.address,
-        testContract.methods.test(100).encodeABI(),
-        Uint8Array.from([]),
-        2_100_000n,
-        gasPrice,
-        null,
-        null,
-        [],
-      ),
+      testContract.options.address,
+      testContract.methods.test(100).encodeABI(),
+      '0',
+      2_100_000,
     );
-    expect((await api.query.system.account(alice.address)).data.free.toBigInt()).to.not.be.equal(originalAliceBalance);
+    expect(await helper.balance.getSubstrate(alice.address)).to.not.be.equal(originalAliceBalance);
   });
 });

--- a/tests/src/eth/scheduling.test.ts
+++ b/tests/src/eth/scheduling.test.ts
@@ -18,7 +18,8 @@
 import {createEthAccountWithBalance, deployFlipper, GAS_ARGS, itWeb3, subToEth, transferBalanceToEth} from './util/helpers';
 import {scheduleExpectSuccess, waitNewBlocks, requirePallets, Pallets} from '../util/helpers';
 
-describe('Scheduing EVM smart contracts', () => {
+// TODO mrshiposha update this test in #581
+describe.skip('Scheduing EVM smart contracts', () => {
   before(async function() {
     await requirePallets(this, [Pallets.Scheduler]);
   });

--- a/tests/src/eth/sponsoring.test.ts
+++ b/tests/src/eth/sponsoring.test.ts
@@ -14,20 +14,31 @@
 // 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 {contractHelpers, createEthAccount, createEthAccountWithBalance, deployCollector, deployFlipper, itWeb3, SponsoringMode} from './util/helpers';
+import {IKeyringPair} from '@polkadot/types/types';
+import {itEth, expect, SponsoringMode} from '../eth/util/playgrounds';
+import {usingPlaygrounds} from './../util/playgrounds/index';
 
 describe('EVM sponsoring', () => {
-  itWeb3('Fee is deducted from contract if sponsoring is enabled', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const sponsor = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const caller = createEthAccount(web3);
-    const originalCallerBalance = await web3.eth.getBalance(caller);
-    expect(originalCallerBalance).to.be.equal('0');
+  let donor: IKeyringPair;
 
-    const flipper = await deployFlipper(web3, owner);
+  before(async () => {
+    await usingPlaygrounds(async (helper, privateKey) => {
+      donor = privateKey('//Alice');
+    });
+  });
+
+  itEth('Fee is deducted from contract if sponsoring is enabled', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const sponsor = await helper.eth.createAccountWithBalance(donor);
+    const caller = helper.eth.createAccount();
+    const originalCallerBalance = await helper.balance.getEthereum(caller);
+
+    expect(originalCallerBalance).to.be.equal(0n);
+
+    const flipper = await helper.eth.deployFlipper(owner);
+
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
 
-    const helpers = contractHelpers(web3, owner);
     await helpers.methods.toggleAllowlist(flipper.options.address, true).send({from: owner});
     await helpers.methods.toggleAllowed(flipper.options.address, caller, true).send({from: owner});
     
@@ -39,27 +50,29 @@
     await helpers.methods.setSponsoringRateLimit(flipper.options.address, 0).send({from: owner});
     expect(await helpers.methods.sponsoringEnabled(flipper.options.address).call()).to.be.true;
 
-    const originalSponsorBalance = await web3.eth.getBalance(sponsor);
-    expect(originalSponsorBalance).to.be.not.equal('0');
+    const originalSponsorBalance = await helper.balance.getEthereum(sponsor);
+    expect(originalSponsorBalance).to.be.not.equal(0n);
 
     await flipper.methods.flip().send({from: caller});
     expect(await flipper.methods.getValue().call()).to.be.true;
 
     // Balance should be taken from flipper instead of caller
-    expect(await web3.eth.getBalance(caller)).to.be.equals(originalCallerBalance);
-    expect(await web3.eth.getBalance(sponsor)).to.be.not.equals(originalSponsorBalance);
+    expect(await helper.balance.getEthereum(caller)).to.be.equal(originalCallerBalance);
+    expect(await helper.balance.getEthereum(sponsor)).to.be.not.equal(originalSponsorBalance);
   });
 
-  itWeb3('...but this doesn\'t applies to payable value', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const sponsor = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const originalCallerBalance = await web3.eth.getBalance(caller);
-    expect(originalCallerBalance).to.be.not.equal('0');
+  itEth('...but this doesn\'t applies to payable value', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const sponsor = await helper.eth.createAccountWithBalance(donor);
+    const caller = await helper.eth.createAccountWithBalance(donor);
+    const originalCallerBalance = await helper.balance.getEthereum(caller);
+
+    expect(originalCallerBalance).to.be.not.equal(0n);
+
+    const collector = await helper.eth.deployCollectorContract(owner);
 
-    const collector = await deployCollector(web3, owner);
+    const helpers = helper.ethNativeContract.contractHelpers(owner);
 
-    const helpers = contractHelpers(web3, owner);
     await helpers.methods.toggleAllowlist(collector.options.address, true).send({from: owner});
     await helpers.methods.toggleAllowed(collector.options.address, caller, true).send({from: owner});
 
@@ -71,14 +84,14 @@
     await helpers.methods.setSponsor(collector.options.address, sponsor).send({from: owner});
     await helpers.methods.confirmSponsorship(collector.options.address).send({from: sponsor});
 
-    const originalSponsorBalance = await web3.eth.getBalance(sponsor);
-    expect(originalSponsorBalance).to.be.not.equal('0');
+    const originalSponsorBalance = await helper.balance.getEthereum(sponsor);
+    expect(originalSponsorBalance).to.be.not.equal(0n);
 
     await collector.methods.giveMoney().send({from: caller, value: '10000'});
 
     // Balance will be taken from both caller (value) and from collector (fee)
-    expect(await web3.eth.getBalance(caller)).to.be.equals((BigInt(originalCallerBalance) - 10000n).toString());
-    expect(await web3.eth.getBalance(sponsor)).to.be.not.equals(originalSponsorBalance);
+    expect(await helper.balance.getEthereum(caller)).to.be.equals((originalCallerBalance - 10000n));
+    expect(await helper.balance.getEthereum(sponsor)).to.be.not.equals(originalSponsorBalance);
     expect(await collector.methods.getCollected().call()).to.be.equal('10000');
   });
 });

--- a/tests/src/eth/util/playgrounds/types.ts
+++ b/tests/src/eth/util/playgrounds/types.ts
@@ -6,4 +6,10 @@
 export interface CompiledContract {
   abi: any;
   object: string;
-}
\ No newline at end of file
+}
+
+export type NormalizedEvent = {
+  address: string,
+  event: string,
+  args: { [key: string]: string }
+};

--- a/tests/src/eth/util/playgrounds/unique.dev.ts
+++ b/tests/src/eth/util/playgrounds/unique.dev.ts
@@ -18,7 +18,7 @@
 
 import {DevUniqueHelper} from '../../../util/playgrounds/unique.dev';
 
-import {ContractImports, CompiledContract} from './types';
+import {ContractImports, CompiledContract, NormalizedEvent} from './types';
 
 // Native contracts ABI
 import collectionHelpersAbi from '../../collectionHelpersAbi.json';
@@ -252,6 +252,33 @@
 
     return before - after;
   }
+
+  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,
+      };
+    });
+  }
 }  
 
 class EthAddressGroup extends EthGroupBase {