git.delta.rocks / unique-network / refs/commits / ed1eea85386f

difftreelog

tests(eth): NFT, RFT, FT tests refactored for playgrounds

Fahrrader2022-09-27parent: #edc6ac8.patch.diff
in: master

6 files changed

modifiedtests/package.jsondiffbeforeafterboth
--- a/tests/package.json
+++ b/tests/package.json
@@ -87,8 +87,11 @@
     "testLimits": "mocha --timeout 9999999 -r ts-node/register ./**/limits.test.ts",
     "testEthCreateNFTCollection": "mocha --timeout 9999999 -r ts-node/register ./**/eth/createNFTCollection.test.ts",
     "testEthCreateRFTCollection": "mocha --timeout 9999999 -r ts-node/register ./**/eth/createRFTCollection.test.ts",
+    "testEthNFT": "mocha --timeout 9999999 -r ts-node/register ./**/eth/nonFungible.test.ts",
     "testRFT": "mocha --timeout 9999999 -r ts-node/register ./**/refungible.test.ts",
+    "testEthRFT": "mocha --timeout 9999999 -r ts-node/register ./**/eth/reFungible.test.ts ./**/eth/reFungibleToken.test.ts",
     "testFT": "mocha --timeout 9999999 -r ts-node/register ./**/fungible.test.ts",
+    "testEthFT": "mocha --timeout 9999999 -r ts-node/register ./**/eth/fungible.test.ts",
     "testRPC": "mocha --timeout 9999999 -r ts-node/register ./**/rpc.test.ts",
     "testPromotion": "mocha --timeout 9999999 -r ts-node/register ./**/app-promotion.test.ts",
     "polkadot-types-fetch-metadata": "curl -H 'Content-Type: application/json' -d '{\"id\":\"1\", \"jsonrpc\":\"2.0\", \"method\": \"state_getMetadata\", \"params\":[]}' http://localhost:9933 > src/interfaces/metadata.json",
modifiedtests/src/eth/fungible.test.tsdiffbeforeafterboth
--- a/tests/src/eth/fungible.test.ts
+++ b/tests/src/eth/fungible.test.ts
@@ -14,204 +14,132 @@
 // 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 {approveExpectSuccess, createCollection, createCollectionExpectSuccess, createFungibleItemExpectSuccess, transferExpectSuccess, transferFromExpectSuccess, UNIQUE} from '../util/helpers';
-import {collectionIdToAddress, createEthAccount, createEthAccountWithBalance, evmCollection, GAS_ARGS, itWeb3, normalizeEvents, recordEthFee, recordEvents, subToEth, transferBalanceToEth} from './util/helpers';
-import fungibleAbi from './fungibleAbi.json';
-import {expect} from 'chai';
-import {submitTransactionAsync} from '../substrate/substrate-api';
+import {expect, itEth, usingEthPlaygrounds} from './util/playgrounds';
+import {IKeyringPair} from '@polkadot/types/types';
 
 describe('Fungible: Information getting', () => {
-  itWeb3('totalSupply', async ({api, web3, privateKeyWrapper}) => {
-    const collection = await createCollectionExpectSuccess({
-      name: 'token name',
-      mode: {type: 'Fungible', decimalPoints: 0},
+  let donor: IKeyringPair;
+  let alice: IKeyringPair;
+
+  before(async function() {
+    await usingEthPlaygrounds(async (helper, privateKey) => {
+      donor = privateKey('//Alice');
+      [alice] = await helper.arrange.createAccounts([20n], donor);
     });
-    const alice = privateKeyWrapper('//Alice');
+  });
 
-    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
+  itEth('totalSupply', async ({helper}) => {
+    const caller = await helper.eth.createAccountWithBalance(donor);
+    const collection = await helper.ft.mintCollection(alice);
+    await collection.mint(alice, 200n);
 
-    await createFungibleItemExpectSuccess(alice, collection, {Value: 200n}, {Substrate: alice.address});
-
-    const address = collectionIdToAddress(collection);
-    const contract = new web3.eth.Contract(fungibleAbi as any, address, {from: caller, ...GAS_ARGS});
+    const contract = helper.ethNativeContract.collectionById(collection.collectionId, 'ft', caller);
     const totalSupply = await contract.methods.totalSupply().call();
-
     expect(totalSupply).to.equal('200');
   });
 
-  itWeb3('balanceOf', async ({api, web3, privateKeyWrapper}) => {
-    const collection = await createCollectionExpectSuccess({
-      name: 'token name',
-      mode: {type: 'Fungible', decimalPoints: 0},
-    });
-    const alice = privateKeyWrapper('//Alice');
+  itEth('balanceOf', async ({helper}) => {
+    const caller = await helper.eth.createAccountWithBalance(donor);
+    const collection = await helper.ft.mintCollection(alice);
+    await collection.mint(alice, 200n, {Ethereum: caller});
 
-    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-
-    await createFungibleItemExpectSuccess(alice, collection, {Value: 200n}, {Ethereum: caller});
-
-    const address = collectionIdToAddress(collection);
-    const contract = new web3.eth.Contract(fungibleAbi as any, address, {from: caller, ...GAS_ARGS});
+    const contract = helper.ethNativeContract.collectionById(collection.collectionId, 'ft', caller);
     const balance = await contract.methods.balanceOf(caller).call();
-
     expect(balance).to.equal('200');
   });
 });
 
 describe('Fungible: Plain calls', () => {
-  itWeb3('Can perform mint()', async ({web3, api, privateKeyWrapper}) => {
-    const alice = privateKeyWrapper('//Alice');
-    const collection = await createCollection(api, alice, {
-      name: 'token name',
-      mode: {type: 'Fungible', decimalPoints: 0},
+  let donor: IKeyringPair;
+  let alice: IKeyringPair;
+
+  before(async function() {
+    await usingEthPlaygrounds(async (helper, privateKey) => {
+      donor = privateKey('//Alice');
+      [alice] = await helper.arrange.createAccounts([20n], donor);
     });
+  });
 
-    const receiver = createEthAccount(web3);
+  itEth('Can perform mint()', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const receiver = helper.eth.createAccount();
+    const collection = await helper.ft.mintCollection(alice);
+    await collection.addAdmin(alice, {Ethereum: owner});
 
-    const collectionIdAddress = collectionIdToAddress(collection.collectionId);
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const changeAdminTx = api.tx.unique.addCollectionAdmin(collection.collectionId, {Ethereum: owner});
-    await submitTransactionAsync(alice, changeAdminTx);
+    const collectionAddress = helper.ethAddress.fromCollectionId(collection.collectionId);
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'ft', owner);
 
-    const collectionContract = evmCollection(web3, owner, collectionIdAddress, {type: 'Fungible', decimalPoints: 0});
-    const result = await collectionContract.methods.mint(receiver, 100).send();
-    const events = normalizeEvents(result.events);
+    const result = await contract.methods.mint(receiver, 100).send();
     
-    expect(events).to.be.deep.equal([
-      {
-        address: collectionIdAddress,
-        event: 'Transfer',
-        args: {
-          from: '0x0000000000000000000000000000000000000000',
-          to: receiver,
-          value: '100',
-        },
-      },
-    ]);
+    const event = result.events.Transfer;
+    expect(event.address).to.equal(collectionAddress);
+    expect(event.returnValues.from).to.equal('0x0000000000000000000000000000000000000000');
+    expect(event.returnValues.to).to.equal(receiver);
+    expect(event.returnValues.value).to.equal('100');
   });
-
-  itWeb3('Can perform mintBulk()', async ({web3, api, privateKeyWrapper}) => {
-    const alice = privateKeyWrapper('//Alice');
-    const collection = await createCollection(api, alice, {
-      name: 'token name',
-      mode: {type: 'Fungible', decimalPoints: 0},
-    });
 
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const receiver1 = createEthAccount(web3);
-    const receiver2 = createEthAccount(web3);
-    const receiver3 = createEthAccount(web3);
-
-    const collectionIdAddress = collectionIdToAddress(collection.collectionId);
-    const changeAdminTx = api.tx.unique.addCollectionAdmin(collection.collectionId, {Ethereum: owner});
-    await submitTransactionAsync(alice, changeAdminTx);
+  itEth('Can perform mintBulk()', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const bulkSize = 3;
+    const receivers = [...new Array(bulkSize)].map(() => helper.eth.createAccount());
+    const collection = await helper.ft.mintCollection(alice);
+    await collection.addAdmin(alice, {Ethereum: owner});
 
-    const collectionContract = evmCollection(web3, owner, collectionIdAddress, {type: 'Fungible', decimalPoints: 0});
-    const result = await collectionContract.methods.mintBulk([
-      [receiver1, 10],
-      [receiver2, 20],
-      [receiver3, 30],
-    ]).send();
-    const events = normalizeEvents(result.events);
+    const collectionAddress = helper.ethAddress.fromCollectionId(collection.collectionId);
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'ft', owner);
 
-    expect(events).to.be.deep.contain({
-      address:collectionIdAddress,
-      event: 'Transfer',
-      args: {
-        from: '0x0000000000000000000000000000000000000000',
-        to: receiver1,
-        value: '10',
-      },
-    });
-    
-    expect(events).to.be.deep.contain({
-      address:collectionIdAddress,
-      event: 'Transfer',
-      args: {
-        from: '0x0000000000000000000000000000000000000000',
-        to: receiver2,
-        value: '20',
-      },
-    });
-    
-    expect(events).to.be.deep.contain({
-      address:collectionIdAddress,
-      event: 'Transfer',
-      args: {
-        from: '0x0000000000000000000000000000000000000000',
-        to: receiver3,
-        value: '30',
-      },
-    });
+    const result = await contract.methods.mintBulk(Array.from({length: bulkSize}, (_, i) => (
+      [receivers[i], (i + 1) * 10]
+    ))).send();
+    const events = result.events.Transfer.sort((a: any, b: any) => +a.returnValues.value - b.returnValues.value);
+    for (let i = 0; i < bulkSize; i++) {
+      const event = events[i];
+      expect(event.address).to.equal(collectionAddress);
+      expect(event.returnValues.from).to.equal('0x0000000000000000000000000000000000000000');
+      expect(event.returnValues.to).to.equal(receivers[i]);
+      expect(event.returnValues.value).to.equal(String(10 * (i + 1)));
+    }
   });
 
-  itWeb3('Can perform burn()', async ({web3, api, privateKeyWrapper}) => {
-    const alice = privateKeyWrapper('//Alice');
-    const collection = await createCollection(api, alice, {
-      name: 'token name',
-      mode: {type: 'Fungible', decimalPoints: 0},
-    });
-
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const changeAdminTx = api.tx.unique.addCollectionAdmin(collection.collectionId, {Ethereum: owner});
-    await submitTransactionAsync(alice, changeAdminTx);
-    const receiver = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
+  itEth('Can perform burn()', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const receiver = await helper.eth.createAccountWithBalance(donor);
+    const collection = await helper.ft.mintCollection(alice);
+    await collection.addAdmin(alice, {Ethereum: owner});
 
-    const collectionIdAddress = collectionIdToAddress(collection.collectionId);
-    const collectionContract = evmCollection(web3, owner, collectionIdAddress, {type: 'Fungible', decimalPoints: 0});
-    await collectionContract.methods.mint(receiver, 100).send();
+    const collectionAddress = helper.ethAddress.fromCollectionId(collection.collectionId);
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'ft', owner);
+    await contract.methods.mint(receiver, 100).send();
 
-    const result = await collectionContract.methods.burnFrom(receiver, 49).send({from: receiver});
+    const result = await contract.methods.burnFrom(receiver, 49).send({from: receiver});
     
-    const events = normalizeEvents(result.events);
-
-    expect(events).to.be.deep.equal([
-      {
-        address: collectionIdAddress,
-        event: 'Transfer',
-        args: {
-          from: receiver,
-          to: '0x0000000000000000000000000000000000000000',
-          value: '49',
-        },
-      },
-    ]);
+    const event = result.events.Transfer;
+    expect(event.address).to.equal(collectionAddress);
+    expect(event.returnValues.from).to.equal(receiver);
+    expect(event.returnValues.to).to.equal('0x0000000000000000000000000000000000000000');
+    expect(event.returnValues.value).to.equal('49');
 
-    const balance = await collectionContract.methods.balanceOf(receiver).call();
+    const balance = await contract.methods.balanceOf(receiver).call();
     expect(balance).to.equal('51');
   });
 
-  itWeb3('Can perform approve()', async ({web3, api, privateKeyWrapper}) => {
-    const collection = await createCollectionExpectSuccess({
-      name: 'token name',
-      mode: {type: 'Fungible', decimalPoints: 0},
-    });
-    const alice = privateKeyWrapper('//Alice');
+  itEth('Can perform approve()', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const spender = helper.eth.createAccount();
+    const collection = await helper.ft.mintCollection(alice);
+    await collection.mint(alice, 200n, {Ethereum: owner});
 
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-
-    await createFungibleItemExpectSuccess(alice, collection, {Value: 200n}, {Ethereum: owner});
-
-    const spender = createEthAccount(web3);
+    const collectionAddress = helper.ethAddress.fromCollectionId(collection.collectionId);
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'ft', owner);
 
-    const address = collectionIdToAddress(collection);
-    const contract = new web3.eth.Contract(fungibleAbi as any, address, {from: owner, ...GAS_ARGS});
-
     {
       const result = await contract.methods.approve(spender, 100).send({from: owner});
-      const events = normalizeEvents(result.events);
 
-      expect(events).to.be.deep.equal([
-        {
-          address,
-          event: 'Approval',
-          args: {
-            owner,
-            spender,
-            value: '100',
-          },
-        },
-      ]);
+      const event = result.events.Approval;
+      expect(event.address).to.be.equal(collectionAddress);
+      expect(event.returnValues.owner).to.be.equal(owner);
+      expect(event.returnValues.spender).to.be.equal(spender);
+      expect(event.returnValues.value).to.be.equal('100');
     }
 
     {
@@ -220,51 +148,32 @@
     }
   });
 
-  itWeb3('Can perform transferFrom()', async ({web3, api, privateKeyWrapper}) => {
-    const collection = await createCollectionExpectSuccess({
-      name: 'token name',
-      mode: {type: 'Fungible', decimalPoints: 0},
-    });
-    const alice = privateKeyWrapper('//Alice');
-
-    const owner = createEthAccount(web3);
-    await transferBalanceToEth(api, alice, owner);
-
-    await createFungibleItemExpectSuccess(alice, collection, {Value: 200n}, {Ethereum: owner});
-
-    const spender = createEthAccount(web3);
-    await transferBalanceToEth(api, alice, spender);
-
-    const receiver = createEthAccount(web3);
+  itEth('Can perform transferFrom()', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const spender = await helper.eth.createAccountWithBalance(donor);
+    const receiver = helper.eth.createAccount();
+    const collection = await helper.ft.mintCollection(alice);
+    await collection.mint(alice, 200n, {Ethereum: owner});
 
-    const address = collectionIdToAddress(collection);
-    const contract = new web3.eth.Contract(fungibleAbi as any, address, {from: owner, ...GAS_ARGS});
+    const collectionAddress = helper.ethAddress.fromCollectionId(collection.collectionId);
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'ft', owner);
 
     await contract.methods.approve(spender, 100).send();
 
     {
       const result = await contract.methods.transferFrom(owner, receiver, 49).send({from: spender});
-      const events = normalizeEvents(result.events);
-      expect(events).to.be.deep.equal([
-        {
-          address,
-          event: 'Transfer',
-          args: {
-            from: owner,
-            to: receiver,
-            value: '49',
-          },
-        },
-        {
-          address,
-          event: 'Approval',
-          args: {
-            owner,
-            spender,
-            value: '51',
-          },
-        },
-      ]);
+      
+      let event = result.events.Transfer;
+      expect(event.address).to.be.equal(collectionAddress);
+      expect(event.returnValues.from).to.be.equal(owner);
+      expect(event.returnValues.to).to.be.equal(receiver);
+      expect(event.returnValues.value).to.be.equal('49');
+
+      event = result.events.Approval;
+      expect(event.address).to.be.equal(collectionAddress);
+      expect(event.returnValues.owner).to.be.equal(owner);
+      expect(event.returnValues.spender).to.be.equal(spender);
+      expect(event.returnValues.value).to.be.equal('51');
     }
 
     {
@@ -278,38 +187,23 @@
     }
   });
 
-  itWeb3('Can perform transfer()', async ({web3, api, privateKeyWrapper}) => {
-    const collection = await createCollectionExpectSuccess({
-      name: 'token name',
-      mode: {type: 'Fungible', decimalPoints: 0},
-    });
-    const alice = privateKeyWrapper('//Alice');
-
-    const owner = createEthAccount(web3);
-    await transferBalanceToEth(api, alice, owner);
-
-    await createFungibleItemExpectSuccess(alice, collection, {Value: 200n}, {Ethereum: owner});
-
-    const receiver = createEthAccount(web3);
-    await transferBalanceToEth(api, alice, receiver);
+  itEth('Can perform transfer()', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const receiver = await helper.eth.createAccountWithBalance(donor);
+    const collection = await helper.ft.mintCollection(alice);
+    await collection.mint(alice, 200n, {Ethereum: owner});
 
-    const address = collectionIdToAddress(collection);
-    const contract = new web3.eth.Contract(fungibleAbi as any, address, {from: owner, ...GAS_ARGS});
+    const collectionAddress = helper.ethAddress.fromCollectionId(collection.collectionId);
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'ft', owner);
 
     {
       const result = await contract.methods.transfer(receiver, 50).send({from: owner});
-      const events = normalizeEvents(result.events);
-      expect(events).to.be.deep.equal([
-        {
-          address,
-          event: 'Transfer',
-          args: {
-            from: owner,
-            to: receiver,
-            value: '50',
-          },
-        },
-      ]);
+      
+      const event = result.events.Transfer;
+      expect(event.address).to.be.equal(collectionAddress);
+      expect(event.returnValues.from).to.be.equal(owner);
+      expect(event.returnValues.to).to.be.equal(receiver);
+      expect(event.returnValues.value).to.be.equal('50');
     }
 
     {
@@ -325,162 +219,141 @@
 });
 
 describe('Fungible: Fees', () => {
-  itWeb3('approve() call fee is less than 0.2UNQ', async ({web3, api, privateKeyWrapper}) => {
-    const collection = await createCollectionExpectSuccess({
-      mode: {type: 'Fungible', decimalPoints: 0},
+  let donor: IKeyringPair;
+  let alice: IKeyringPair;
+
+  before(async function() {
+    await usingEthPlaygrounds(async (helper, privateKey) => {
+      donor = privateKey('//Alice');
+      [alice] = await helper.arrange.createAccounts([20n], donor);
     });
-    const alice = privateKeyWrapper('//Alice');
+  });
+  
+  itEth('approve() call fee is less than 0.2UNQ', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const spender = helper.eth.createAccount();
+    const collection = await helper.ft.mintCollection(alice);
+    await collection.mint(alice, 200n, {Ethereum: owner});
 
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const spender = createEthAccount(web3);
-
-    await createFungibleItemExpectSuccess(alice, collection, {Value: 200n}, {Ethereum: owner});
+    const collectionAddress = helper.ethAddress.fromCollectionId(collection.collectionId);
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'ft', owner);
 
-    const address = collectionIdToAddress(collection);
-    const contract = new web3.eth.Contract(fungibleAbi as any, address, {from: owner, ...GAS_ARGS});
-
-    const cost = await recordEthFee(api, owner, () => contract.methods.approve(spender, 100).send({from: owner}));
-    expect(cost < BigInt(0.2 * Number(UNIQUE)));
+    const cost = await helper.eth.recordCallFee(owner, () => contract.methods.approve(spender, 100).send({from: owner}));
+    expect(cost < BigInt(0.2 * Number(helper.balance.getOneTokenNominal())));
   });
 
-  itWeb3('transferFrom() call fee is less than 0.2UNQ', async ({web3, api, privateKeyWrapper}) => {
-    const collection = await createCollectionExpectSuccess({
-      mode: {type: 'Fungible', decimalPoints: 0},
-    });
-    const alice = privateKeyWrapper('//Alice');
-
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const spender = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-
-    await createFungibleItemExpectSuccess(alice, collection, {Value: 200n}, {Ethereum: owner});
+  itEth('transferFrom() call fee is less than 0.2UNQ', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const spender = await helper.eth.createAccountWithBalance(donor);
+    const collection = await helper.ft.mintCollection(alice);
+    await collection.mint(alice, 200n, {Ethereum: owner});
 
-    const address = collectionIdToAddress(collection);
-    const contract = new web3.eth.Contract(fungibleAbi as any, address, {from: owner, ...GAS_ARGS});
+    const collectionAddress = helper.ethAddress.fromCollectionId(collection.collectionId);
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'ft', owner);
 
     await contract.methods.approve(spender, 100).send({from: owner});
 
-    const cost = await recordEthFee(api, spender, () => contract.methods.transferFrom(owner, spender, 100).send({from: spender}));
-    expect(cost < BigInt(0.2 * Number(UNIQUE)));
+    const cost = await helper.eth.recordCallFee(spender, () => contract.methods.transferFrom(owner, spender, 100).send({from: spender}));
+    expect(cost < BigInt(0.2 * Number(helper.balance.getOneTokenNominal())));
   });
-
-  itWeb3('transfer() call fee is less than 0.2UNQ', async ({web3, api, privateKeyWrapper}) => {
-    const collection = await createCollectionExpectSuccess({
-      mode: {type: 'Fungible', decimalPoints: 0},
-    });
-    const alice = privateKeyWrapper('//Alice');
 
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const receiver = createEthAccount(web3);
-
-    await createFungibleItemExpectSuccess(alice, collection, {Value: 200n}, {Ethereum: owner});
+  itEth('transfer() call fee is less than 0.2UNQ', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const receiver = helper.eth.createAccount();
+    const collection = await helper.ft.mintCollection(alice);
+    await collection.mint(alice, 200n, {Ethereum: owner});
 
-    const address = collectionIdToAddress(collection);
-    const contract = new web3.eth.Contract(fungibleAbi as any, address, {from: owner, ...GAS_ARGS});
+    const collectionAddress = helper.ethAddress.fromCollectionId(collection.collectionId);
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'ft', owner);
 
-    const cost = await recordEthFee(api, owner, () => contract.methods.transfer(receiver, 100).send({from: owner}));
-    expect(cost < BigInt(0.2 * Number(UNIQUE)));
+    const cost = await helper.eth.recordCallFee(owner, () => contract.methods.transfer(receiver, 100).send({from: owner}));
+    expect(cost < BigInt(0.2 * Number(helper.balance.getOneTokenNominal())));
   });
 });
 
 describe('Fungible: Substrate calls', () => {
-  itWeb3('Events emitted for approve()', async ({web3, privateKeyWrapper}) => {
-    const collection = await createCollectionExpectSuccess({
-      mode: {type: 'Fungible', decimalPoints: 0},
+  let donor: IKeyringPair;
+  let alice: IKeyringPair;
+
+  before(async function() {
+    await usingEthPlaygrounds(async (helper, privateKey) => {
+      donor = privateKey('//Alice');
+      [alice] = await helper.arrange.createAccounts([20n], donor);
     });
-    const alice = privateKeyWrapper('//Alice');
+  });
 
-    const receiver = createEthAccount(web3);
+  itEth('Events emitted for approve()', async ({helper}) => {
+    const receiver = helper.eth.createAccount();
+    const collection = await helper.ft.mintCollection(alice);
+    await collection.mint(alice, 200n);
 
-    await createFungibleItemExpectSuccess(alice, collection, {Value: 200n});
+    const collectionAddress = helper.ethAddress.fromCollectionId(collection.collectionId);
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'ft');
 
-    const address = collectionIdToAddress(collection);
-    const contract = new web3.eth.Contract(fungibleAbi as any, address);
-
-    const events = await recordEvents(contract, async () => {
-      await approveExpectSuccess(collection, 0, alice, {Ethereum: receiver}, 100);
+    const events: any = [];
+    contract.events.allEvents((_: any, event: any) => {
+      events.push(event);
     });
+    await collection.approveTokens(alice, {Ethereum: receiver}, 100n);
 
-    expect(events).to.be.deep.equal([
-      {
-        address,
-        event: 'Approval',
-        args: {
-          owner: subToEth(alice.address),
-          spender: receiver,
-          value: '100',
-        },
-      },
-    ]);
+    const event = events[0];
+    expect(event.event).to.be.equal('Approval');
+    expect(event.address).to.be.equal(collectionAddress);
+    expect(event.returnValues.owner).to.be.equal(helper.address.substrateToEth(alice.address));
+    expect(event.returnValues.spender).to.be.equal(receiver);
+    expect(event.returnValues.value).to.be.equal('100');
   });
 
-  itWeb3('Events emitted for transferFrom()', async ({web3, privateKeyWrapper}) => {
-    const collection = await createCollectionExpectSuccess({
-      mode: {type: 'Fungible', decimalPoints: 0},
-    });
-    const alice = privateKeyWrapper('//Alice');
-    const bob = privateKeyWrapper('//Bob');
+  itEth('Events emitted for transferFrom()', async ({helper}) => {
+    const [bob] = await helper.arrange.createAccounts([10n], donor);
+    const receiver = helper.eth.createAccount();
+    const collection = await helper.ft.mintCollection(alice);
+    await collection.mint(alice, 200n);
+    await collection.approveTokens(alice, {Substrate: bob.address}, 100n);
 
-    const receiver = createEthAccount(web3);
+    const collectionAddress = helper.ethAddress.fromCollectionId(collection.collectionId);
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'ft');
 
-    await createFungibleItemExpectSuccess(alice, collection, {Value: 200n});
-    await approveExpectSuccess(collection, 0, alice, bob.address, 100);
+    const events: any = [];
+    contract.events.allEvents((_: any, event: any) => {
+      events.push(event);
+    });
+    await collection.transferFrom(bob, {Substrate: alice.address}, {Ethereum: receiver}, 51n);
 
-    const address = collectionIdToAddress(collection);
-    const contract = new web3.eth.Contract(fungibleAbi as any, address);
+    let event = events[0];
+    expect(event.event).to.be.equal('Transfer');
+    expect(event.address).to.be.equal(collectionAddress);
+    expect(event.returnValues.from).to.be.equal(helper.address.substrateToEth(alice.address));
+    expect(event.returnValues.to).to.be.equal(receiver);
+    expect(event.returnValues.value).to.be.equal('51');
 
-    const events = await recordEvents(contract, async () => {
-      await transferFromExpectSuccess(collection, 0, bob, alice, {Ethereum: receiver}, 51, 'Fungible');
-    });
-
-    expect(events).to.be.deep.equal([
-      {
-        address,
-        event: 'Transfer',
-        args: {
-          from: subToEth(alice.address),
-          to: receiver,
-          value: '51',
-        },
-      },
-      {
-        address,
-        event: 'Approval',
-        args: {
-          owner: subToEth(alice.address),
-          spender: subToEth(bob.address),
-          value: '49',
-        },
-      },
-    ]);
+    event = events[1];
+    expect(event.event).to.be.equal('Approval');
+    expect(event.address).to.be.equal(collectionAddress);
+    expect(event.returnValues.owner).to.be.equal(helper.address.substrateToEth(alice.address));
+    expect(event.returnValues.spender).to.be.equal(helper.address.substrateToEth(bob.address));
+    expect(event.returnValues.value).to.be.equal('49');
   });
 
-  itWeb3('Events emitted for transfer()', async ({web3, privateKeyWrapper}) => {
-    const collection = await createCollectionExpectSuccess({
-      mode: {type: 'Fungible', decimalPoints: 0},
-    });
-    const alice = privateKeyWrapper('//Alice');
+  itEth('Events emitted for transfer()', async ({helper}) => {
+    const receiver = helper.eth.createAccount();
+    const collection = await helper.ft.mintCollection(alice);
+    await collection.mint(alice, 200n);
 
-    const receiver = createEthAccount(web3);
+    const collectionAddress = helper.ethAddress.fromCollectionId(collection.collectionId);
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'ft');
 
-    await createFungibleItemExpectSuccess(alice, collection, {Value: 200n});
-
-    const address = collectionIdToAddress(collection);
-    const contract = new web3.eth.Contract(fungibleAbi as any, address);
-
-    const events = await recordEvents(contract, async () => {
-      await transferExpectSuccess(collection, 0, alice, {Ethereum:receiver}, 51, 'Fungible');
+    const events: any = [];
+    contract.events.allEvents((_: any, event: any) => {
+      events.push(event);
     });
+    await collection.transfer(alice, {Ethereum:receiver}, 51n);
 
-    expect(events).to.be.deep.equal([
-      {
-        address,
-        event: 'Transfer',
-        args: {
-          from: subToEth(alice.address),
-          to: receiver,
-          value: '51',
-        },
-      },
-    ]);
+    const event = events[0];
+    expect(event.event).to.be.equal('Transfer');
+    expect(event.address).to.be.equal(collectionAddress);
+    expect(event.returnValues.from).to.be.equal(helper.address.substrateToEth(alice.address));
+    expect(event.returnValues.to).to.be.equal(receiver);
+    expect(event.returnValues.value).to.be.equal('51');
   });
 });
modifiedtests/src/eth/nonFungible.test.tsdiffbeforeafterboth
14// You should have received a copy of the GNU General Public License14// You should have received a copy of the GNU General Public License
15// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.15// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
1616
17import {approveExpectSuccess, burnItemExpectSuccess, createCollectionExpectSuccess, createItemExpectSuccess, transferExpectSuccess, transferFromExpectSuccess, UNIQUE} from '../util/helpers';17import {itEth, usingEthPlaygrounds, expect, EthUniqueHelper} from './util/playgrounds';
18import {collectionIdToAddress, createEthAccount, createEthAccountWithBalance, evmCollection, evmCollectionHelpers, GAS_ARGS, getCollectionAddressFromResult, itWeb3, normalizeEvents, recordEthFee, recordEvents, subToEth, transferBalanceToEth} from './util/helpers';18import {IKeyringPair} from '@polkadot/types/types';
19import nonFungibleAbi from './nonFungibleAbi.json';19import {Contract} from 'web3-eth-contract';
20import {expect} from 'chai';
21import {submitTransactionAsync} from '../substrate/substrate-api';
2220
23describe('NFT: Information getting', () => {21describe('NFT: Information getting', () => {
24  itWeb3('totalSupply', async ({api, web3, privateKeyWrapper}) => {22  let donor: IKeyringPair;
23  let alice: IKeyringPair;
24
25  before(async function() {
26    await usingEthPlaygrounds(async (helper, privateKey) => {
25    const collection = await createCollectionExpectSuccess({27      donor = privateKey('//Alice');
26      mode: {type: 'NFT'},28      [alice] = await helper.arrange.createAccounts([10n], donor);
27    });29    });
28    const alice = privateKeyWrapper('//Alice');30  });
31  
32  itEth('totalSupply', async ({helper}) => {
29    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);33    const collection = await helper.nft.mintCollection(alice, {});
34    await collection.mintToken(alice);
3035
31    await createItemExpectSuccess(alice, collection, 'NFT', {Substrate: alice.address});36    const caller = await helper.eth.createAccountWithBalance(donor);
3237
33    const address = collectionIdToAddress(collection);38    const contract = helper.ethNativeContract.collectionById(collection.collectionId, 'nft', caller);
34    const contract = new web3.eth.Contract(nonFungibleAbi as any, address, {from: caller, ...GAS_ARGS});
35    const totalSupply = await contract.methods.totalSupply().call();39    const totalSupply = await contract.methods.totalSupply().call();
3640
37    expect(totalSupply).to.equal('1');41    expect(totalSupply).to.equal('1');
38  });42  });
3943
40  itWeb3('balanceOf', async ({api, web3, privateKeyWrapper}) => {44  itEth('balanceOf', async ({helper}) => {
41    const collection = await createCollectionExpectSuccess({45    const collection = await helper.nft.mintCollection(alice, {});
42      mode: {type: 'NFT'},
43    });
44    const alice = privateKeyWrapper('//Alice');46    const caller = await helper.eth.createAccountWithBalance(donor);
4547
46    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);48    await collection.mintToken(alice, {Ethereum: caller});
47    await createItemExpectSuccess(alice, collection, 'NFT', {Ethereum:caller});
48    await createItemExpectSuccess(alice, collection, 'NFT', {Ethereum: caller});49    await collection.mintToken(alice, {Ethereum: caller});
49    await createItemExpectSuccess(alice, collection, 'NFT', {Ethereum: caller});50    await collection.mintToken(alice, {Ethereum: caller});
5051
51    const address = collectionIdToAddress(collection);52    const contract = helper.ethNativeContract.collectionById(collection.collectionId, 'nft', caller);
52    const contract = new web3.eth.Contract(nonFungibleAbi as any, address, {from: caller, ...GAS_ARGS});
53    const balance = await contract.methods.balanceOf(caller).call();53    const balance = await contract.methods.balanceOf(caller).call();
5454
55    expect(balance).to.equal('3');55    expect(balance).to.equal('3');
56  });56  });
5757
58  itWeb3('ownerOf', async ({api, web3, privateKeyWrapper}) => {58  itEth('ownerOf', async ({helper}) => {
59    const collection = await createCollectionExpectSuccess({59    const collection = await helper.nft.mintCollection(alice, {});
60      mode: {type: 'NFT'},
61    });
62    const alice = privateKeyWrapper('//Alice');60    const caller = await helper.eth.createAccountWithBalance(donor);
6361
64    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);62    const token = await collection.mintToken(alice, {Ethereum: caller});
65    const tokenId = await createItemExpectSuccess(alice, collection, 'NFT', {Ethereum: caller});
6663
67    const address = collectionIdToAddress(collection);64    const contract = helper.ethNativeContract.collectionById(collection.collectionId, 'nft', caller);
68    const contract = new web3.eth.Contract(nonFungibleAbi as any, address, {from: caller, ...GAS_ARGS});
69    const owner = await contract.methods.ownerOf(tokenId).call();
7065
66    const owner = await contract.methods.ownerOf(token.tokenId).call();
67
71    expect(owner).to.equal(caller);68    expect(owner).to.equal(caller);
72  });69  });
73});70});
7471
75describe('Check ERC721 token URI for NFT', () => {72describe('Check ERC721 token URI for NFT', () => {
76  itWeb3('Empty tokenURI', async ({web3, api, privateKeyWrapper}) => {73  let donor: IKeyringPair;
74
75  before(async function() {
76    await usingEthPlaygrounds(async (_helper, privateKey) => {
77      donor = privateKey('//Alice');
78    });
79  });
80
81  async function setup(helper: EthUniqueHelper, tokenPrefix: string, propertyKey?: string, propertyValue?: string): Promise<{contract: Contract, nextTokenId: string}> {
77    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);82    const owner = await helper.eth.createAccountWithBalance(donor);
83    const receiver = helper.eth.createAccount();
84
78    const helper = evmCollectionHelpers(web3, owner);85    const collectionHelper = helper.ethNativeContract.collectionHelpers(owner);
79    let result = await helper.methods.createERC721MetadataCompatibleCollection('Mint collection', '1', '1', '').send();86    let result = await collectionHelper.methods.createERC721MetadataCompatibleCollection('Mint collection', 'a', 'b', tokenPrefix).send();
80    const {collectionIdAddress, collectionId} = await getCollectionAddressFromResult(api, result);87    const collectionAddress = helper.ethAddress.normalizeAddress(result.events.CollectionCreated.returnValues.collectionId);
81    const receiver = createEthAccount(web3);88    const contract = helper.ethNativeContract.collection(collectionAddress, 'nft', owner);
82    const contract = evmCollection(web3, owner, collectionIdAddress);
83    89    
84    const nextTokenId = await contract.methods.nextTokenId().call();90    const nextTokenId = await contract.methods.nextTokenId().call();
85    expect(nextTokenId).to.be.equal('1');91    expect(nextTokenId).to.be.equal('1');
88      nextTokenId,94      nextTokenId,
89    ).send();95    ).send();
9096
91    const events = normalizeEvents(result.events);97    if (propertyKey && propertyValue) {
92    const address = collectionIdToAddress(collectionId);98      // Set URL or suffix
99      await contract.methods.setProperty(nextTokenId, propertyKey, Buffer.from(propertyValue)).send();
100    }
93101
94    expect(events).to.be.deep.equal([102    const event = result.events.Transfer;
103    expect(event.address).to.be.equal(collectionAddress);
95      {104    expect(event.returnValues.from).to.be.equal('0x0000000000000000000000000000000000000000');
96        address,
97        event: 'Transfer',
98        args: {
99          from: '0x0000000000000000000000000000000000000000',
100          to: receiver,105    expect(event.returnValues.to).to.be.equal(receiver);
101          tokenId: nextTokenId,106    expect(event.returnValues.tokenId).to.be.equal(nextTokenId);
102        },
103      },
104    ]);
105107
108    return {contract, nextTokenId};
109  }
110
111  itEth('Empty tokenURI', async ({helper}) => {
112    const {contract, nextTokenId} = await setup(helper, '');
106    expect(await contract.methods.tokenURI(nextTokenId).call()).to.be.equal('');113    expect(await contract.methods.tokenURI(nextTokenId).call()).to.be.equal('');
107  });114  });
108115
109  itWeb3('TokenURI from url', async ({web3, api, privateKeyWrapper}) => {116  itEth('TokenURI from url', async ({helper}) => {
110    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);117    const {contract, nextTokenId} = await setup(helper, 'BaseURI_', 'url', 'Token URI');
111    const helper = evmCollectionHelpers(web3, owner);
112    let result = await helper.methods.createERC721MetadataCompatibleCollection('Mint collection', '1', '1', 'BaseURI_').send();
113    const {collectionIdAddress, collectionId} = await getCollectionAddressFromResult(api, result);
114    const receiver = createEthAccount(web3);
115    const contract = evmCollection(web3, owner, collectionIdAddress);
116    
117    const nextTokenId = await contract.methods.nextTokenId().call();
118    expect(nextTokenId).to.be.equal('1');
119    result = await contract.methods.mint(
120      receiver,
121      nextTokenId,
122    ).send();
123    
124    // Set URL
125    await contract.methods.setProperty(nextTokenId, 'url', Buffer.from('Token URI')).send();
126      
127    const events = normalizeEvents(result.events);
128    const address = collectionIdToAddress(collectionId);
129
130    expect(events).to.be.deep.equal([
131      {
132        address,
133        event: 'Transfer',
134        args: {
135          from: '0x0000000000000000000000000000000000000000',
136          to: receiver,
137          tokenId: nextTokenId,
138        },
139      },
140    ]);
141
142    expect(await contract.methods.tokenURI(nextTokenId).call()).to.be.equal('Token URI');118    expect(await contract.methods.tokenURI(nextTokenId).call()).to.be.equal('Token URI');
143  });119  });
144120
145  itWeb3('TokenURI from baseURI + tokenId', async ({web3, api, privateKeyWrapper}) => {121  itEth('TokenURI from baseURI + tokenId', async ({helper}) => {
146    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);122    const {contract, nextTokenId} = await setup(helper, 'BaseURI_');
147    const helper = evmCollectionHelpers(web3, owner);
148    let result = await helper.methods.createERC721MetadataCompatibleCollection('Mint collection', '1', '1', 'BaseURI_').send();
149    const {collectionIdAddress, collectionId} = await getCollectionAddressFromResult(api, result);
150    const receiver = createEthAccount(web3);
151    const contract = evmCollection(web3, owner, collectionIdAddress);
152    
153    const nextTokenId = await contract.methods.nextTokenId().call();
154    expect(nextTokenId).to.be.equal('1');
155    result = await contract.methods.mint(
156      receiver,
157      nextTokenId,
158    ).send();
159          
160    const events = normalizeEvents(result.events);
161    const address = collectionIdToAddress(collectionId);
162
163    expect(events).to.be.deep.equal([
164      {
165        address,
166        event: 'Transfer',
167        args: {
168          from: '0x0000000000000000000000000000000000000000',
169          to: receiver,
170          tokenId: nextTokenId,
171        },
172      },
173    ]);
174
175    expect(await contract.methods.tokenURI(nextTokenId).call()).to.be.equal('BaseURI_' + nextTokenId);123    expect(await contract.methods.tokenURI(nextTokenId).call()).to.be.equal('BaseURI_' + nextTokenId);
176  });124  });
177125
178  itWeb3('TokenURI from baseURI + suffix', async ({web3, api, privateKeyWrapper}) => {126  itEth('TokenURI from baseURI + suffix', async ({helper}) => {
179    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
180    const helper = evmCollectionHelpers(web3, owner);
181    let result = await helper.methods.createERC721MetadataCompatibleCollection('Mint collection', '1', '1', 'BaseURI_').send();
182    const {collectionIdAddress, collectionId} = await getCollectionAddressFromResult(api, result);
183    const receiver = createEthAccount(web3);
184    const contract = evmCollection(web3, owner, collectionIdAddress);
185    
186    const nextTokenId = await contract.methods.nextTokenId().call();
187    expect(nextTokenId).to.be.equal('1');
188    result = await contract.methods.mint(
189      receiver,
190      nextTokenId,
191    ).send();
192          
193    // Set suffix
194    const suffix = '/some/suffix';127    const suffix = '/some/suffix';
195    await contract.methods.setProperty(nextTokenId, 'suffix', Buffer.from(suffix)).send();128    const {contract, nextTokenId} = await setup(helper, 'BaseURI_', 'suffix', suffix);
196
197    const events = normalizeEvents(result.events);
198    const address = collectionIdToAddress(collectionId);
199
200    expect(events).to.be.deep.equal([
201      {
202        address,
203        event: 'Transfer',
204        args: {
205          from: '0x0000000000000000000000000000000000000000',
206          to: receiver,
207          tokenId: nextTokenId,
208        },
209      },
210    ]);
211
212    expect(await contract.methods.tokenURI(nextTokenId).call()).to.be.equal('BaseURI_' + suffix);129    expect(await contract.methods.tokenURI(nextTokenId).call()).to.be.equal('BaseURI_' + suffix);
213  });130  });
214});131});
215132
216describe('NFT: Plain calls', () => {133describe('NFT: Plain calls', () => {
217  itWeb3('Can perform mint()', async ({web3, api, privateKeyWrapper}) => {134  let donor: IKeyringPair;
135  let alice: IKeyringPair;
136
137  before(async function() {
138    await usingEthPlaygrounds(async (helper, privateKey) => {
218    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);139      donor = privateKey('//Alice');
219    const helper = evmCollectionHelpers(web3, owner);140      [alice] = await helper.arrange.createAccounts([10n], donor);
220    let result = await helper.methods.createNonfungibleCollection('Mint collection', '6', '6').send();141    });
142  });
143
144  itEth('Can perform mint()', async ({helper}) => {
221    const {collectionIdAddress, collectionId} = await getCollectionAddressFromResult(api, result);145    const owner = await helper.eth.createAccountWithBalance(donor);
222    const receiver = createEthAccount(web3);146    const receiver = helper.eth.createAccount();
147
223    const contract = evmCollection(web3, owner, collectionIdAddress);148    const {collectionAddress} = await helper.eth.createNonfungibleCollection(owner, 'Minty', '6', '6');
149    const contract = helper.ethNativeContract.collection(collectionAddress, 'nft', owner);
224    const nextTokenId = await contract.methods.nextTokenId().call();150    const nextTokenId = await contract.methods.nextTokenId().call();
225151
226    expect(nextTokenId).to.be.equal('1');152    expect(nextTokenId).to.be.equal('1');
227    result = await contract.methods.mintWithTokenURI(153    const result = await contract.methods.mintWithTokenURI(
228      receiver,154      receiver,
229      nextTokenId,155      nextTokenId,
230      'Test URI',156      'Test URI',
231    ).send();157    ).send();
232158
233    const events = normalizeEvents(result.events);159    const event = result.events.Transfer;
160    expect(event.address).to.be.equal(collectionAddress);
234    const address = collectionIdToAddress(collectionId);161    expect(event.returnValues.from).to.be.equal('0x0000000000000000000000000000000000000000');
162    expect(event.returnValues.to).to.be.equal(receiver);
163    expect(event.returnValues.tokenId).to.be.equal(nextTokenId);
235164
236    expect(events).to.be.deep.equal([
237      {
238        address,
239        event: 'Transfer',
240        args: {
241          from: '0x0000000000000000000000000000000000000000',
242          to: receiver,
243          tokenId: nextTokenId,
244        },
245      },
246    ]);
247
248    expect(await contract.methods.tokenURI(nextTokenId).call()).to.be.equal('Test URI');165    expect(await contract.methods.tokenURI(nextTokenId).call()).to.be.equal('Test URI');
249166
250    // TODO: this wont work right now, need release 919000 first167    // TODO: this wont work right now, need release 919000 first
254  });171  });
255172
256  //TODO: CORE-302 add eth methods173  //TODO: CORE-302 add eth methods
257  itWeb3.skip('Can perform mintBulk()', async ({web3, api, privateKeyWrapper}) => {174  /* todo:playgrounds skipped test!
175  itWeb3.skip('Can perform mintBulk()', async ({helper}) => {
258    const collection = await createCollectionExpectSuccess({176    const collection = await createCollectionExpectSuccess({
259      mode: {type: 'NFT'},177      mode: {type: 'NFT'},
260    });178    });
316      expect(await contract.methods.tokenURI(+nextTokenId + 2).call()).to.be.equal('Test URI 2');234      expect(await contract.methods.tokenURI(+nextTokenId + 2).call()).to.be.equal('Test URI 2');
317    }235    }
318  });236  });
237  */
319238
320  itWeb3('Can perform burn()', async ({web3, api, privateKeyWrapper}) => {239  itEth('Can perform burn()', async ({helper}) => {
321    const collection = await createCollectionExpectSuccess({240    const caller = await helper.eth.createAccountWithBalance(donor);
322      mode: {type: 'NFT'},
323    });
324    const alice = privateKeyWrapper('//Alice');
325241
326    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);242    const collection = await helper.nft.mintCollection(alice, {});
243    const {tokenId} = await collection.mintToken(alice, {Ethereum: caller});
327244
328    const tokenId = await createItemExpectSuccess(alice, collection, 'NFT', {Ethereum: owner});245    const collectionAddress = helper.ethAddress.fromCollectionId(collection.collectionId);
246    const contract = helper.ethNativeContract.collection(collectionAddress, 'nft', caller);
329247
330    const address = collectionIdToAddress(collection);
331    const contract = new web3.eth.Contract(nonFungibleAbi as any, address, {from: owner, ...GAS_ARGS});
332
333    {248    {
334      const result = await contract.methods.burn(tokenId).send({from: owner});249      const result = await contract.methods.burn(tokenId).send({from: caller});
335      const events = normalizeEvents(result.events);250      
336251      const event = result.events.Transfer;
337      expect(events).to.be.deep.equal([252      expect(event.address).to.be.equal(collectionAddress);
338        {253      expect(event.returnValues.from).to.be.equal(caller);
339          address,
340          event: 'Transfer',
341          args: {
342            from: owner,
343            to: '0x0000000000000000000000000000000000000000',254      expect(event.returnValues.to).to.be.equal('0x0000000000000000000000000000000000000000');
344            tokenId: tokenId.toString(),255      expect(event.returnValues.tokenId).to.be.equal(`${tokenId}`);
345          },
346        },
347      ]);
348    }256    }
349  });257  });
350258
351  itWeb3('Can perform approve()', async ({web3, api, privateKeyWrapper}) => {259  itEth('Can perform approve()', async ({helper}) => {
352    const collection = await createCollectionExpectSuccess({260    const owner = await helper.eth.createAccountWithBalance(donor);
353      mode: {type: 'NFT'},
354    });
355    const alice = privateKeyWrapper('//Alice');261    const spender = helper.eth.createAccount();
356262
357    const owner = createEthAccount(web3);263    const collection = await helper.nft.mintCollection(alice, {});
358    await transferBalanceToEth(api, alice, owner);264    const {tokenId} = await collection.mintToken(alice, {Ethereum: owner});
359265
360    const tokenId = await createItemExpectSuccess(alice, collection, 'NFT', {Ethereum: owner});266    const collectionAddress = helper.ethAddress.fromCollectionId(collection.collectionId);
267    const contract = helper.ethNativeContract.collection(collectionAddress, 'nft', owner);
361268
362    const spender = createEthAccount(web3);
363
364    const address = collectionIdToAddress(collection);
365    const contract = new web3.eth.Contract(nonFungibleAbi as any, address);
366
367    {269    {
368      const result = await contract.methods.approve(spender, tokenId).send({from: owner, ...GAS_ARGS});270      const result = await contract.methods.approve(spender, tokenId).send({from: owner});
369      const events = normalizeEvents(result.events);
370271
371      expect(events).to.be.deep.equal([272      const event = result.events.Approval;
372        {
373          address,273      expect(event.address).to.be.equal(collectionAddress);
374          event: 'Approval',274      expect(event.returnValues.owner).to.be.equal(owner);
375          args: {
376            owner,
377            approved: spender,275      expect(event.returnValues.approved).to.be.equal(spender);
378            tokenId: tokenId.toString(),276      expect(event.returnValues.tokenId).to.be.equal(`${tokenId}`);
379          },
380        },
381      ]);
382    }277    }
383  });278  });
384279
385  itWeb3('Can perform transferFrom()', async ({web3, api, privateKeyWrapper}) => {280  itEth('Can perform transferFrom()', async ({helper}) => {
386    const collection = await createCollectionExpectSuccess({281    const owner = await helper.eth.createAccountWithBalance(donor);
387      mode: {type: 'NFT'},282    const spender = await helper.eth.createAccountWithBalance(donor);
388    });
389    const alice = privateKeyWrapper('//Alice');283    const receiver = helper.eth.createAccount();
390284
391    const owner = createEthAccount(web3);285    const collection = await helper.nft.mintCollection(alice, {});
392    await transferBalanceToEth(api, alice, owner);286    const {tokenId} = await collection.mintToken(alice, {Ethereum: owner});
393287
394    const tokenId = await createItemExpectSuccess(alice, collection, 'NFT', {Ethereum: owner});288    const collectionAddress = helper.ethAddress.fromCollectionId(collection.collectionId);
289    const contract = helper.ethNativeContract.collection(collectionAddress, 'nft', owner);
395290
396    const spender = createEthAccount(web3);
397    await transferBalanceToEth(api, alice, spender);
398
399    const receiver = createEthAccount(web3);
400
401    const address = collectionIdToAddress(collection);
402    const contract = new web3.eth.Contract(nonFungibleAbi as any, address, {from: owner, ...GAS_ARGS});
403
404    await contract.methods.approve(spender, tokenId).send({from: owner});291    await contract.methods.approve(spender, tokenId).send({from: owner});
405292
406    {293    {
407      const result = await contract.methods.transferFrom(owner, receiver, tokenId).send({from: spender});294      const result = await contract.methods.transferFrom(owner, receiver, tokenId).send({from: spender});
295
408      const events = normalizeEvents(result.events);296      const event = result.events.Transfer;
409      expect(events).to.be.deep.equal([297      expect(event.address).to.be.equal(collectionAddress);
410        {298      expect(event.returnValues.from).to.be.equal(owner);
411          address,
412          event: 'Transfer',
413          args: {
414            from: owner,
415            to: receiver,299      expect(event.returnValues.to).to.be.equal(receiver);
416            tokenId: tokenId.toString(),300      expect(event.returnValues.tokenId).to.be.equal(`${tokenId}`);
417          },
418        },
419      ]);
420    }301    }
421302
422    {303    {
430    }311    }
431  });312  });
432313
433  itWeb3('Can perform transfer()', async ({web3, api, privateKeyWrapper}) => {314  itEth('Can perform transfer()', async ({helper}) => {
434    const collection = await createCollectionExpectSuccess({315    const collection = await helper.nft.mintCollection(alice, {});
435      mode: {type: 'NFT'},316    const owner = await helper.eth.createAccountWithBalance(donor);
436    });
437    const alice = privateKeyWrapper('//Alice');317    const receiver = helper.eth.createAccount();
438318
439    const owner = createEthAccount(web3);319    const {tokenId} = await collection.mintToken(alice, {Ethereum: owner});
440    await transferBalanceToEth(api, alice, owner);
441320
442    const tokenId = await createItemExpectSuccess(alice, collection, 'NFT', {Ethereum: owner});321    const collectionAddress = helper.ethAddress.fromCollectionId(collection.collectionId);
322    const contract = helper.ethNativeContract.collection(collectionAddress, 'nft', owner);
443323
444    const receiver = createEthAccount(web3);
445    await transferBalanceToEth(api, alice, receiver);
446
447    const address = collectionIdToAddress(collection);
448    const contract = new web3.eth.Contract(nonFungibleAbi as any, address, {from: owner, ...GAS_ARGS});
449
450    {324    {
451      const result = await contract.methods.transfer(receiver, tokenId).send({from: owner});325      const result = await contract.methods.transfer(receiver, tokenId).send({from: owner});
326
452      const events = normalizeEvents(result.events);327      const event = result.events.Transfer;
453      expect(events).to.be.deep.equal([328      expect(event.address).to.be.equal(collectionAddress);
454        {329      expect(event.returnValues.from).to.be.equal(owner);
455          address,
456          event: 'Transfer',
457          args: {
458            from: owner,
459            to: receiver,330      expect(event.returnValues.to).to.be.equal(receiver);
460            tokenId: tokenId.toString(),331      expect(event.returnValues.tokenId).to.be.equal(`${tokenId}`);
461          },
462        },
463      ]);
464    }332    }
465333
466    {334    {
476});344});
477345
478describe('NFT: Fees', () => {346describe('NFT: Fees', () => {
479  itWeb3('approve() call fee is less than 0.2UNQ', async ({web3, api, privateKeyWrapper}) => {347  let donor: IKeyringPair;
348  let alice: IKeyringPair;
349
350  before(async function() {
351    await usingEthPlaygrounds(async (helper, privateKey) => {
480    const collection = await createCollectionExpectSuccess({352      donor = privateKey('//Alice');
481      mode: {type: 'NFT'},353      [alice] = await helper.arrange.createAccounts([10n], donor);
482    });354    });
483    const alice = privateKeyWrapper('//Alice');355  });
356  
357  itEth('approve() call fee is less than 0.2UNQ', async ({helper}) => {
358    const owner = await helper.eth.createAccountWithBalance(donor);
359    const spender = helper.eth.createAccount();
484360
485    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);361    const collection = await helper.nft.mintCollection(alice, {});
486    const spender = createEthAccount(web3);362    const {tokenId} = await collection.mintToken(alice, {Ethereum: owner});
487363
488    const tokenId = await createItemExpectSuccess(alice, collection, 'NFT', {Ethereum: owner});364    const contract = helper.ethNativeContract.collectionById(collection.collectionId, 'nft', owner);
489365
490    const address = collectionIdToAddress(collection);366    const cost = await helper.eth.recordCallFee(owner, () => contract.methods.approve(spender, tokenId).send({from: owner}));
491    const contract = new web3.eth.Contract(nonFungibleAbi as any, address, {from: owner, ...GAS_ARGS});
492
493    const cost = await recordEthFee(api, owner, () => contract.methods.approve(spender, tokenId).send({from: owner}));
494    expect(cost < BigInt(0.2 * Number(UNIQUE)));367    expect(cost < BigInt(0.2 * Number(helper.balance.getOneTokenNominal())));
495  });368  });
496369
497  itWeb3('transferFrom() call fee is less than 0.2UNQ', async ({web3, api, privateKeyWrapper}) => {370  itEth('transferFrom() call fee is less than 0.2UNQ', async ({helper}) => {
498    const collection = await createCollectionExpectSuccess({371    const owner = await helper.eth.createAccountWithBalance(donor);
499      mode: {type: 'NFT'},
500    });
501    const alice = privateKeyWrapper('//Alice');372    const spender = await helper.eth.createAccountWithBalance(donor);
502373
503    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);374    const collection = await helper.nft.mintCollection(alice, {});
504    const spender = await createEthAccountWithBalance(api, web3, privateKeyWrapper);375    const {tokenId} = await collection.mintToken(alice, {Ethereum: owner});
505376
506    const tokenId = await createItemExpectSuccess(alice, collection, 'NFT', {Ethereum: owner});377    const contract = helper.ethNativeContract.collectionById(collection.collectionId, 'nft', owner);
507378
508    const address = collectionIdToAddress(collection);
509    const contract = new web3.eth.Contract(nonFungibleAbi as any, address, {from: owner, ...GAS_ARGS});
510
511    await contract.methods.approve(spender, tokenId).send({from: owner});379    await contract.methods.approve(spender, tokenId).send({from: owner});
512380
513    const cost = await recordEthFee(api, spender, () => contract.methods.transferFrom(owner, spender, tokenId).send({from: spender}));381    const cost = await helper.eth.recordCallFee(spender, () => contract.methods.transferFrom(owner, spender, tokenId).send({from: spender}));
514    expect(cost < BigInt(0.2 * Number(UNIQUE)));382    expect(cost < BigInt(0.2 * Number(helper.balance.getOneTokenNominal())));
515  });383  });
516384
517  itWeb3('transfer() call fee is less than 0.2UNQ', async ({web3, api, privateKeyWrapper}) => {385  itEth('transfer() call fee is less than 0.2UNQ', async ({helper}) => {
518    const collection = await createCollectionExpectSuccess({386    const owner = await helper.eth.createAccountWithBalance(donor);
519      mode: {type: 'NFT'},
520    });
521    const alice = privateKeyWrapper('//Alice');387    const receiver = helper.eth.createAccount();
522388
523    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);389    const collection = await helper.nft.mintCollection(alice, {});
524    const receiver = createEthAccount(web3);390    const {tokenId} = await collection.mintToken(alice, {Ethereum: owner});
525391
526    const tokenId = await createItemExpectSuccess(alice, collection, 'NFT', {Ethereum: owner});392    const contract = helper.ethNativeContract.collectionById(collection.collectionId, 'nft', owner);
527393
528    const address = collectionIdToAddress(collection);394    const cost = await helper.eth.recordCallFee(owner, () => contract.methods.transfer(receiver, tokenId).send({from: owner}));
529    const contract = new web3.eth.Contract(nonFungibleAbi as any, address, {from: owner, ...GAS_ARGS});
530
531    const cost = await recordEthFee(api, owner, () => contract.methods.transfer(receiver, tokenId).send({from: owner}));
532    expect(cost < BigInt(0.2 * Number(UNIQUE)));395    expect(cost < BigInt(0.2 * Number(helper.balance.getOneTokenNominal())));
533  });396  });
534});397});
535398
536describe('NFT: Substrate calls', () => {399describe('NFT: Substrate calls', () => {
537  itWeb3('Events emitted for mint()', async ({web3, privateKeyWrapper}) => {400  let donor: IKeyringPair;
538    const collection = await createCollectionExpectSuccess({
539      mode: {type: 'NFT'},
540    });
541    const alice = privateKeyWrapper('//Alice');401  let alice: IKeyringPair;
542402
543    const address = collectionIdToAddress(collection);403  before(async function() {
544    const contract = new web3.eth.Contract(nonFungibleAbi as any, address);404    await usingEthPlaygrounds(async (helper, privateKey) => {
545
546    let tokenId: number;
547    const events = await recordEvents(contract, async () => {405      donor = privateKey('//Alice');
548      tokenId = await createItemExpectSuccess(alice, collection, 'NFT');406      [alice] = await helper.arrange.createAccounts([20n], donor);
549    });407    });
550
551    expect(events).to.be.deep.equal([
552      {
553        address,
554        event: 'Transfer',
555        args: {
556          from: '0x0000000000000000000000000000000000000000',
557          to: subToEth(alice.address),
558          tokenId: tokenId!.toString(),
559        },
560      },
561    ]);
562  });408  });
563409
564  itWeb3('Events emitted for burn()', async ({web3, privateKeyWrapper}) => {410  itEth('Events emitted for mint()', async ({helper}) => {
565    const collection = await createCollectionExpectSuccess({411    const collection = await helper.nft.mintCollection(alice, {});
566      mode: {type: 'NFT'},412    const collectionAddress = helper.ethAddress.fromCollectionId(collection.collectionId);
567    });
568    const alice = privateKeyWrapper('//Alice');413    const contract = helper.ethNativeContract.collection(collectionAddress, 'nft');
569414
570    const address = collectionIdToAddress(collection);415    const events: any = [];
571    const contract = new web3.eth.Contract(nonFungibleAbi as any, address);416    contract.events.allEvents((_: any, event: any) => {
572
573    const tokenId = await createItemExpectSuccess(alice, collection, 'NFT');
574    const events = await recordEvents(contract, async () => {
575      await burnItemExpectSuccess(alice, collection, tokenId);417      events.push(event);
576    });418    });
419    const {tokenId} = await collection.mintToken(alice);
577420
578    expect(events).to.be.deep.equal([421    const event = events[0];
579      {
580        address,
581        event: 'Transfer',422    expect(event.event).to.be.equal('Transfer');
582        args: {423    expect(event.address).to.be.equal(collectionAddress);
583          from: subToEth(alice.address),
584          to: '0x0000000000000000000000000000000000000000',424    expect(event.returnValues.from).to.be.equal('0x0000000000000000000000000000000000000000');
585          tokenId: tokenId.toString(),425    expect(event.returnValues.to).to.be.equal(helper.address.substrateToEth(alice.address));
586        },
587      },
588    ]);426    expect(event.returnValues.tokenId).to.be.equal(tokenId.toString());
589  });427  });
590428
591  itWeb3('Events emitted for approve()', async ({web3, privateKeyWrapper}) => {429  itEth('Events emitted for burn()', async ({helper}) => {
592    const collection = await createCollectionExpectSuccess({430    const collection = await helper.nft.mintCollection(alice, {});
593      mode: {type: 'NFT'},431    const token = await collection.mintToken(alice);
432
433    const collectionAddress = helper.ethAddress.fromCollectionId(collection.collectionId);
434    const contract = helper.ethNativeContract.collection(collectionAddress, 'nft');
435    
436    const events: any = [];
437    contract.events.allEvents((_: any, event: any) => {
438      events.push(event);
594    });439    });
595    const alice = privateKeyWrapper('//Alice');
596440
597    const receiver = createEthAccount(web3);441    await token.burn(alice);
598442
599    const tokenId = await createItemExpectSuccess(alice, collection, 'NFT');443    const event = events[0];
444    expect(event.event).to.be.equal('Transfer');
445    expect(event.address).to.be.equal(collectionAddress);
446    expect(event.returnValues.from).to.be.equal(helper.address.substrateToEth(alice.address));
447    expect(event.returnValues.to).to.be.equal('0x0000000000000000000000000000000000000000');
448    expect(event.returnValues.tokenId).to.be.equal(token.tokenId.toString());
449  });
600450
601    const address = collectionIdToAddress(collection);451  itEth('Events emitted for approve()', async ({helper}) => {
602    const contract = new web3.eth.Contract(nonFungibleAbi as any, address);452    const receiver = helper.eth.createAccount();
603453
604    const events = await recordEvents(contract, async () => {454    const collection = await helper.nft.mintCollection(alice, {});
605      await approveExpectSuccess(collection, tokenId, alice, {Ethereum: receiver}, 1);455    const token = await collection.mintToken(alice);
606    });
607456
608    expect(events).to.be.deep.equal([457    const collectionAddress = helper.ethAddress.fromCollectionId(collection.collectionId);
609      {458    const contract = helper.ethNativeContract.collection(collectionAddress, 'nft');
610        address,
611        event: 'Approval',
612        args: {
613          owner: subToEth(alice.address),
614          approved: receiver,459    
615          tokenId: tokenId.toString(),460    const events: any = [];
616        },
617      },
618    ]);
619  });461    contract.events.allEvents((_: any, event: any) => {
620
621  itWeb3('Events emitted for transferFrom()', async ({web3, privateKeyWrapper}) => {
622    const collection = await createCollectionExpectSuccess({462      events.push(event);
623      mode: {type: 'NFT'},
624    });463    });
625    const alice = privateKeyWrapper('//Alice');
626    const bob = privateKeyWrapper('//Bob');
627464
628    const receiver = createEthAccount(web3);465    await token.approve(alice, {Ethereum: receiver});
629466
630    const tokenId = await createItemExpectSuccess(alice, collection, 'NFT');467    const event = events[0];
468    expect(event.event).to.be.equal('Approval');
631    await approveExpectSuccess(collection, tokenId, alice, bob.address, 1);469    expect(event.address).to.be.equal(collectionAddress);
470    expect(event.returnValues.owner).to.be.equal(helper.address.substrateToEth(alice.address));
471    expect(event.returnValues.approved).to.be.equal(receiver);
472    expect(event.returnValues.tokenId).to.be.equal(token.tokenId.toString());
473  });
632474
633    const address = collectionIdToAddress(collection);475  itEth('Events emitted for transferFrom()', async ({helper}) => {
476    const [bob] = await helper.arrange.createAccounts([10n], donor);
634    const contract = new web3.eth.Contract(nonFungibleAbi as any, address);477    const receiver = helper.eth.createAccount();
635478
636    const events = await recordEvents(contract, async () => {479    const collection = await helper.nft.mintCollection(alice, {});
480    const token = await collection.mintToken(alice);
481    await token.approve(alice, {Substrate: bob.address});
482
637      await transferFromExpectSuccess(collection, tokenId, bob, alice, {Ethereum: receiver}, 1, 'NFT');483    const collectionAddress = helper.ethAddress.fromCollectionId(collection.collectionId);
484    const contract = helper.ethNativeContract.collection(collectionAddress, 'nft');
485    
486    const events: any = [];
487    contract.events.allEvents((_: any, event: any) => {
488      events.push(event);
638    });489    });
639490
640    expect(events).to.be.deep.equal([491    await token.transferFrom(bob, {Substrate: alice.address}, {Ethereum: receiver});
641      {
642        address,
643        event: 'Transfer',492    
644        args: {493    const event = events[0];
645          from: subToEth(alice.address),494    expect(event.address).to.be.equal(collectionAddress);
495    expect(event.returnValues.from).to.be.equal(helper.address.substrateToEth(alice.address));
646          to: receiver,496    expect(event.returnValues.to).to.be.equal(receiver);
647          tokenId: tokenId.toString(),497    expect(event.returnValues.tokenId).to.be.equal(`${token.tokenId}`);
648        },
649      },
650    ]);
651  });498  });
652499
653  itWeb3('Events emitted for transfer()', async ({web3, privateKeyWrapper}) => {500  itEth('Events emitted for transfer()', async ({helper}) => {
654    const collection = await createCollectionExpectSuccess({501    const receiver = helper.eth.createAccount();
655      mode: {type: 'NFT'},
656    });
657    const alice = privateKeyWrapper('//Alice');
658502
659    const receiver = createEthAccount(web3);503    const collection = await helper.nft.mintCollection(alice, {});
504    const token = await collection.mintToken(alice);
660505
661    const tokenId = await createItemExpectSuccess(alice, collection, 'NFT');506    const collectionAddress = helper.ethAddress.fromCollectionId(collection.collectionId);
662
663    const address = collectionIdToAddress(collection);507    const contract = helper.ethNativeContract.collection(collectionAddress, 'nft');
664    const contract = new web3.eth.Contract(nonFungibleAbi as any, address);508    
665509    const events: any = [];
666    const events = await recordEvents(contract, async () => {510    contract.events.allEvents((_: any, event: any) => {
667      await transferExpectSuccess(collection, tokenId, alice, {Ethereum: receiver}, 1, 'NFT');511      events.push(event);
668    });512    });
669513
670    expect(events).to.be.deep.equal([514    await token.transfer(alice, {Ethereum: receiver});
671      {515    
672        address,516    const event = events[0];
673        event: 'Transfer',517    expect(event.address).to.be.equal(collectionAddress);
674        args: {518    expect(event.returnValues.from).to.be.equal(helper.address.substrateToEth(alice.address));
675          from: subToEth(alice.address),
676          to: receiver,519    expect(event.returnValues.to).to.be.equal(receiver);
677          tokenId: tokenId.toString(),520    expect(event.returnValues.tokenId).to.be.equal(`${token.tokenId}`);
678        },
679      },
680    ]);
681  });521  });
682});522});
683523
684describe('Common metadata', () => {524describe('Common metadata', () => {
685  itWeb3('Returns collection name', async ({api, web3, privateKeyWrapper}) => {525  let donor: IKeyringPair;
526  let alice: IKeyringPair;
527
528  before(async function() {
686    const collection = await createCollectionExpectSuccess({529    await usingEthPlaygrounds(async (helper, privateKey) => {
687      name: 'token name',530      donor = privateKey('//Alice');
688      mode: {type: 'NFT'},531      [alice] = await helper.arrange.createAccounts([20n], donor);
689    });532    });
690    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);533  });
691534
692    const address = collectionIdToAddress(collection);535  itEth('Returns collection name', async ({helper}) => {
693    const contract = new web3.eth.Contract(nonFungibleAbi as any, address, {from: caller, ...GAS_ARGS});536    const caller = await helper.eth.createAccountWithBalance(donor);
694    const name = await contract.methods.name().call();537    const collection = await helper.nft.mintCollection(alice, {name: 'oh River', tokenPrefix: 'CHANGE'});
695538
696    expect(name).to.equal('token name');539    const contract = helper.ethNativeContract.collectionById(collection.collectionId, 'nft', caller);
540    const name = await contract.methods.name().call();
541    expect(name).to.equal('oh River');
697  });542  });
698543
699  itWeb3('Returns symbol name', async ({api, web3, privateKeyWrapper}) => {544  itEth('Returns symbol name', async ({helper}) => {
700    const collection = await createCollectionExpectSuccess({545    const caller = await helper.eth.createAccountWithBalance(donor);
701      tokenPrefix: 'TOK',
702      mode: {type: 'NFT'},
703    });
704    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);546    const collection = await helper.nft.mintCollection(alice, {name: 'oh River', tokenPrefix: 'CHANGE'});
705547
706    const address = collectionIdToAddress(collection);548    const contract = helper.ethNativeContract.collectionById(collection.collectionId, 'nft', caller);
707    const contract = new web3.eth.Contract(nonFungibleAbi as any, address, {from: caller, ...GAS_ARGS});
708    const symbol = await contract.methods.symbol().call();549    const symbol = await contract.methods.symbol().call();
709
710    expect(symbol).to.equal('TOK');550    expect(symbol).to.equal('CHANGE');
711  });551  });
712});552});
modifiedtests/src/eth/reFungible.test.tsdiffbeforeafterboth
--- a/tests/src/eth/reFungible.test.ts
+++ b/tests/src/eth/reFungible.test.ts
@@ -14,33 +14,35 @@
 // 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 {createCollectionExpectSuccess, UNIQUE, requirePallets, Pallets} from '../util/helpers';
-import {collectionIdToAddress, createEthAccount, createEthAccountWithBalance, evmCollection, evmCollectionHelpers, getCollectionAddressFromResult, itWeb3, normalizeEvents, recordEthFee, recordEvents, tokenIdToAddress, uniqueRefungibleToken} from './util/helpers';
-import {expect} from 'chai';
+import {Pallets, requirePalletsOrSkip} from '../util/playgrounds';
+import {expect, itEth, usingEthPlaygrounds} from './util/playgrounds';
+import {IKeyringPair} from '@polkadot/types/types';
 
 describe('Refungible: Information getting', () => {
+  let donor: IKeyringPair;
+
   before(async function() {
-    await requirePallets(this, [Pallets.ReFungible]);
+    await usingEthPlaygrounds(async (helper, privateKey) => {
+      requirePalletsOrSkip(this, helper, [Pallets.ReFungible]);
+
+      donor = privateKey('//Alice');
+    });
   });
 
-  itWeb3('totalSupply', async ({api, web3, privateKeyWrapper}) => {
-    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const helper = evmCollectionHelpers(web3, caller);
-    const result = await helper.methods.createRFTCollection('Mint collection', '6', '6').send();
-    const {collectionIdAddress} = await getCollectionAddressFromResult(api, result);
-    const contract = evmCollection(web3, caller, collectionIdAddress, {type: 'ReFungible'});
+  itEth('totalSupply', async ({helper}) => {
+    const caller = await helper.eth.createAccountWithBalance(donor);
+    const {collectionAddress} = await helper.eth.createRefungibleCollection(caller, 'TotalSupply', '6', '6');
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'rft', caller);
     const nextTokenId = await contract.methods.nextTokenId().call();
     await contract.methods.mint(caller, nextTokenId).send();
     const totalSupply = await contract.methods.totalSupply().call();
     expect(totalSupply).to.equal('1');
   });
 
-  itWeb3('balanceOf', async ({api, web3, privateKeyWrapper}) => {
-    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const helper = evmCollectionHelpers(web3, caller);
-    const result = await helper.methods.createRFTCollection('Mint collection', '6', '6').send();
-    const {collectionIdAddress} = await getCollectionAddressFromResult(api, result);
-    const contract = evmCollection(web3, caller, collectionIdAddress, {type: 'ReFungible'});
+  itEth('balanceOf', async ({helper}) => {
+    const caller = await helper.eth.createAccountWithBalance(donor);
+    const {collectionAddress} = await helper.eth.createRefungibleCollection(caller, 'BalanceOf', '6', '6');
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'rft', caller);
 
     {
       const nextTokenId = await contract.methods.nextTokenId().call();
@@ -56,38 +58,30 @@
     }
 
     const balance = await contract.methods.balanceOf(caller).call();
-
     expect(balance).to.equal('3');
   });
 
-  itWeb3('ownerOf', async ({api, web3, privateKeyWrapper}) => {
-    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const helper = evmCollectionHelpers(web3, caller);
-    const result = await helper.methods.createRFTCollection('Mint collection', '6', '6').send();
-    const {collectionIdAddress} = await getCollectionAddressFromResult(api, result);
-    const contract = evmCollection(web3, caller, collectionIdAddress, {type: 'ReFungible'});
+  itEth('ownerOf', async ({helper}) => {
+    const caller = await helper.eth.createAccountWithBalance(donor);
+    const {collectionAddress} = await helper.eth.createRefungibleCollection(caller, 'OwnerOf', '6', '6');
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'rft', caller);
 
     const tokenId = await contract.methods.nextTokenId().call();
     await contract.methods.mint(caller, tokenId).send();
 
     const owner = await contract.methods.ownerOf(tokenId).call();
-
     expect(owner).to.equal(caller);
   });
 
-  itWeb3('ownerOf after burn', async ({api, web3, privateKeyWrapper}) => {
-    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const receiver = createEthAccount(web3);
-    const helper = evmCollectionHelpers(web3, caller);
-    const result = await helper.methods.createRFTCollection('Mint collection', '6', '6').send();
-    const {collectionIdAddress, collectionId} = await getCollectionAddressFromResult(api, result);
-    const contract = evmCollection(web3, caller, collectionIdAddress, {type: 'ReFungible'});
+  itEth('ownerOf after burn', async ({helper}) => {
+    const caller = await helper.eth.createAccountWithBalance(donor);
+    const receiver = helper.eth.createAccount();
+    const {collectionId, collectionAddress} = await helper.eth.createRefungibleCollection(caller, 'OwnerOf-AfterBurn', '6', '6');
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'rft', caller);
 
     const tokenId = await contract.methods.nextTokenId().call();
     await contract.methods.mint(caller, tokenId).send();
-
-    const tokenAddress = tokenIdToAddress(collectionId, tokenId);
-    const tokenContract = uniqueRefungibleToken(web3, tokenAddress, caller);
+    const tokenContract = helper.ethNativeContract.rftTokenById(collectionId, tokenId, caller);
 
     await tokenContract.methods.repartition(2).send();
     await tokenContract.methods.transfer(receiver, 1).send();
@@ -95,80 +89,67 @@
     await tokenContract.methods.burnFrom(caller, 1).send();
 
     const owner = await contract.methods.ownerOf(tokenId).call();
-
     expect(owner).to.equal(receiver);
   });
 
-  itWeb3('ownerOf for partial ownership', async ({api, web3, privateKeyWrapper}) => {
-    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const receiver = createEthAccount(web3);
-    const helper = evmCollectionHelpers(web3, caller);
-    const result = await helper.methods.createRFTCollection('Mint collection', '6', '6').send();
-    const {collectionIdAddress, collectionId} = await getCollectionAddressFromResult(api, result);
-    const contract = evmCollection(web3, caller, collectionIdAddress, {type: 'ReFungible'});
+  itEth('ownerOf for partial ownership', async ({helper}) => {
+    const caller = await helper.eth.createAccountWithBalance(donor);
+    const receiver = helper.eth.createAccount();
+    const {collectionId, collectionAddress} = await helper.eth.createRefungibleCollection(caller, 'Partial-OwnerOf', '6', '6');
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'rft', caller);
 
     const tokenId = await contract.methods.nextTokenId().call();
     await contract.methods.mint(caller, tokenId).send();
-
-    const tokenAddress = tokenIdToAddress(collectionId, tokenId);
-    const tokenContract = uniqueRefungibleToken(web3, tokenAddress, caller);
+    const tokenContract = helper.ethNativeContract.rftTokenById(collectionId, tokenId, caller);
 
     await tokenContract.methods.repartition(2).send();
     await tokenContract.methods.transfer(receiver, 1).send();
 
     const owner = await contract.methods.ownerOf(tokenId).call();
-
     expect(owner).to.equal('0xFFfFfFffFFfffFFfFFfFFFFFffFFFffffFfFFFfF');
   });
 });
 
 describe('Refungible: Plain calls', () => {
+  let donor: IKeyringPair;
+
   before(async function() {
-    await requirePallets(this, [Pallets.ReFungible]);
+    await usingEthPlaygrounds(async (helper, privateKey) => {
+      requirePalletsOrSkip(this, helper, [Pallets.ReFungible]);
+
+      donor = privateKey('//Alice');
+    });
   });
 
-  itWeb3('Can perform mint()', async ({web3, api, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const helper = evmCollectionHelpers(web3, owner);
-    let result = await helper.methods.createRFTCollection('Mint collection', '6', '6').send();
-    const {collectionIdAddress} = await getCollectionAddressFromResult(api, result);
-    const receiver = createEthAccount(web3);
-    const contract = evmCollection(web3, owner, collectionIdAddress, {type: 'ReFungible'});
+  itEth('Can perform mint()', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const receiver = helper.eth.createAccount();
+    const {collectionAddress} = await helper.eth.createRefungibleCollection(owner, 'Minty', '6', '6');
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'rft', owner);
+    
     const nextTokenId = await contract.methods.nextTokenId().call();
-
     expect(nextTokenId).to.be.equal('1');
-    result = await contract.methods.mintWithTokenURI(
+    const result = await contract.methods.mintWithTokenURI(
       receiver,
       nextTokenId,
       'Test URI',
     ).send();
 
-    const events = normalizeEvents(result.events);
-
-    expect(events).to.include.deep.members([
-      {
-        address: collectionIdAddress,
-        event: 'Transfer',
-        args: {
-          from: '0x0000000000000000000000000000000000000000',
-          to: receiver,
-          tokenId: nextTokenId,
-        },
-      },
-    ]);
+    const event = result.events.Transfer;
+    expect(event.address).to.equal(collectionAddress);
+    expect(event.returnValues.from).to.equal('0x0000000000000000000000000000000000000000');
+    expect(event.returnValues.to).to.equal(receiver);
+    expect(event.returnValues.tokenId).to.equal(nextTokenId);
 
     expect(await contract.methods.tokenURI(nextTokenId).call()).to.be.equal('Test URI');
   });
 
-  itWeb3('Can perform mintBulk()', async ({web3, api, privateKeyWrapper}) => {
-    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const helper = evmCollectionHelpers(web3, caller);
-    const result = await helper.methods.createRFTCollection('Mint collection', '6', '6').send();
-    const {collectionIdAddress} = await getCollectionAddressFromResult(api, result);
-    const contract = evmCollection(web3, caller, collectionIdAddress, {type: 'ReFungible'});
+  itEth('Can perform mintBulk()', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const receiver = helper.eth.createAccount();
+    const {collectionAddress} = await helper.eth.createRefungibleCollection(owner, 'MintBulky', '6', '6');
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'rft', owner);
 
-    const receiver = createEthAccount(web3);
-
     {
       const nextTokenId = await contract.methods.nextTokenId().call();
       expect(nextTokenId).to.be.equal('1');
@@ -180,37 +161,15 @@
           [+nextTokenId + 2, 'Test URI 2'],
         ],
       ).send();
-      const events = normalizeEvents(result.events);
 
-      expect(events).to.include.deep.members([
-        {
-          address: collectionIdAddress,
-          event: 'Transfer',
-          args: {
-            from: '0x0000000000000000000000000000000000000000',
-            to: receiver,
-            tokenId: nextTokenId,
-          },
-        },
-        {
-          address: collectionIdAddress,
-          event: 'Transfer',
-          args: {
-            from: '0x0000000000000000000000000000000000000000',
-            to: receiver,
-            tokenId: String(+nextTokenId + 1),
-          },
-        },
-        {
-          address: collectionIdAddress,
-          event: 'Transfer',
-          args: {
-            from: '0x0000000000000000000000000000000000000000',
-            to: receiver,
-            tokenId: String(+nextTokenId + 2),
-          },
-        },
-      ]);
+      const events = result.events.Transfer;
+      for (let i = 0; i < 2; i++) {
+        const event = events[i];
+        expect(event.address).to.equal(collectionAddress);
+        expect(event.returnValues.from).to.equal('0x0000000000000000000000000000000000000000');
+        expect(event.returnValues.to).to.equal(receiver);
+        expect(event.returnValues.tokenId).to.equal(String(+nextTokenId + i));
+      }
 
       expect(await contract.methods.tokenURI(nextTokenId).call()).to.be.equal('Test URI 0');
       expect(await contract.methods.tokenURI(+nextTokenId + 1).call()).to.be.equal('Test URI 1');
@@ -218,76 +177,54 @@
     }
   });
 
-  itWeb3('Can perform burn()', async ({web3, api, privateKeyWrapper}) => {
-    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const helper = evmCollectionHelpers(web3, caller);
-    const result = await helper.methods.createRFTCollection('Mint collection', '6', '6').send();
-    const {collectionIdAddress} = await getCollectionAddressFromResult(api, result);
-    const contract = evmCollection(web3, caller, collectionIdAddress, {type: 'ReFungible'});
+  itEth('Can perform burn()', async ({helper}) => {
+    const caller = await helper.eth.createAccountWithBalance(donor);
+    const {collectionAddress} = await helper.eth.createRefungibleCollection(caller, 'Burny', '6', '6');
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'rft', caller);
 
     const tokenId = await contract.methods.nextTokenId().call();
     await contract.methods.mint(caller, tokenId).send();
     {
       const result = await contract.methods.burn(tokenId).send();
-      const events = normalizeEvents(result.events);
-      expect(events).to.include.deep.members([
-        {
-          address: collectionIdAddress,
-          event: 'Transfer',
-          args: {
-            from: caller,
-            to: '0x0000000000000000000000000000000000000000',
-            tokenId: tokenId.toString(),
-          },
-        },
-      ]);
+      const event = result.events.Transfer;
+      expect(event.address).to.equal(collectionAddress);
+      expect(event.returnValues.from).to.equal(caller);
+      expect(event.returnValues.to).to.equal('0x0000000000000000000000000000000000000000');
+      expect(event.returnValues.tokenId).to.equal(tokenId.toString());
     }
   });
 
-  itWeb3('Can perform transferFrom()', async ({web3, api, privateKeyWrapper}) => {
-    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const helper = evmCollectionHelpers(web3, caller);
-    const result = await helper.methods.createRFTCollection('Mint collection', '6', '6').send();
-    const {collectionIdAddress, collectionId} = await getCollectionAddressFromResult(api, result);
-    const contract = evmCollection(web3, caller, collectionIdAddress, {type: 'ReFungible'});
-
-    const receiver = createEthAccount(web3);
+  itEth('Can perform transferFrom()', async ({helper}) => {
+    const caller = await helper.eth.createAccountWithBalance(donor);
+    const receiver = helper.eth.createAccount();
+    const {collectionId, collectionAddress} = await helper.eth.createRefungibleCollection(caller, 'TransferFromy', '6', '6');
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'rft', caller);
 
     const tokenId = await contract.methods.nextTokenId().call();
+    const tokenAddress = helper.ethAddress.fromTokenId(collectionId, tokenId);
     await contract.methods.mint(caller, tokenId).send();
 
-    const address = tokenIdToAddress(collectionId, tokenId);
-    const tokenContract = uniqueRefungibleToken(web3, address, caller);
+    const tokenContract = helper.ethNativeContract.rftToken(tokenAddress, caller);
     await tokenContract.methods.repartition(15).send();
 
     {
-      const erc20Events = await recordEvents(tokenContract, async () => {
-        const result = await contract.methods.transferFrom(caller, receiver, tokenId).send();
-        const events = normalizeEvents(result.events);
-        expect(events).to.include.deep.members([
-          {
-            address: collectionIdAddress,
-            event: 'Transfer',
-            args: {
-              from: caller,
-              to: receiver,
-              tokenId: tokenId.toString(),
-            },
-          },
-        ]);
+      const tokenEvents: any = [];
+      tokenContract.events.allEvents((_: any, event: any) => {
+        tokenEvents.push(event);
       });
+      const result = await contract.methods.transferFrom(caller, receiver, tokenId).send();
+
+      let event = result.events.Transfer;
+      expect(event.address).to.equal(collectionAddress);
+      expect(event.returnValues.from).to.equal(caller);
+      expect(event.returnValues.to).to.equal(receiver);
+      expect(event.returnValues.tokenId).to.equal(tokenId.toString());
 
-      expect(erc20Events).to.include.deep.members([
-        {
-          address,
-          event: 'Transfer',
-          args: {
-            from: caller,
-            to: receiver,
-            value: '15',
-          },
-        },
-      ]);
+      event = tokenEvents[0];
+      expect(event.address).to.equal(tokenAddress);
+      expect(event.returnValues.from).to.equal(caller);
+      expect(event.returnValues.to).to.equal(receiver);
+      expect(event.returnValues.value).to.equal('15');
     }
 
     {
@@ -301,32 +238,23 @@
     }
   });
 
-  itWeb3('Can perform transfer()', async ({web3, api, privateKeyWrapper}) => {
-    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const helper = evmCollectionHelpers(web3, caller);
-    const result = await helper.methods.createRFTCollection('Mint collection', '6', '6').send();
-    const {collectionIdAddress} = await getCollectionAddressFromResult(api, result);
-    const contract = evmCollection(web3, caller, collectionIdAddress, {type: 'ReFungible'});
-
-    const receiver = createEthAccount(web3);
+  itEth('Can perform transfer()', async ({helper}) => {
+    const caller = await helper.eth.createAccountWithBalance(donor);
+    const receiver = helper.eth.createAccount();
+    const {collectionAddress} = await helper.eth.createRefungibleCollection(caller, 'Transferry', '6', '6');
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'rft', caller);
 
     const tokenId = await contract.methods.nextTokenId().call();
     await contract.methods.mint(caller, tokenId).send();
 
     {
       const result = await contract.methods.transfer(receiver, tokenId).send();
-      const events = normalizeEvents(result.events);
-      expect(events).to.include.deep.members([
-        {
-          address: collectionIdAddress,
-          event: 'Transfer',
-          args: {
-            from: caller,
-            to: receiver,
-            tokenId: tokenId.toString(),
-          },
-        },
-      ]);
+      
+      const event = result.events.Transfer;
+      expect(event.address).to.equal(collectionAddress);
+      expect(event.returnValues.from).to.equal(caller);
+      expect(event.returnValues.to).to.equal(receiver);
+      expect(event.returnValues.tokenId).to.equal(tokenId.toString());
     }
 
     {
@@ -340,141 +268,127 @@
     }
   });
 
-  itWeb3('transfer event on transfer from partial ownership to full ownership', async ({api, web3, privateKeyWrapper}) => {
-    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const receiver = createEthAccount(web3);
-    const helper = evmCollectionHelpers(web3, caller);
-    const result = await helper.methods.createRFTCollection('Mint collection', '6', '6').send();
-    const {collectionIdAddress, collectionId} = await getCollectionAddressFromResult(api, result);
-    const contract = evmCollection(web3, caller, collectionIdAddress, {type: 'ReFungible'});
+  itEth('transfer event on transfer from partial ownership to full ownership', async ({helper}) => {
+    const caller = await helper.eth.createAccountWithBalance(donor);
+    const receiver = helper.eth.createAccount();
+    const {collectionId, collectionAddress} = await helper.eth.createRefungibleCollection(caller, 'Transferry-Partial-to-Full', '6', '6');
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'rft', caller);
 
     const tokenId = await contract.methods.nextTokenId().call();
     await contract.methods.mint(caller, tokenId).send();
 
-    const tokenAddress = tokenIdToAddress(collectionId, tokenId);
-    const tokenContract = uniqueRefungibleToken(web3, tokenAddress, caller);
+    const tokenContract = helper.ethNativeContract.rftTokenById(collectionId, tokenId, caller);
 
     await tokenContract.methods.repartition(2).send();
     await tokenContract.methods.transfer(receiver, 1).send();
 
-    const events =  await recordEvents(contract, async () =>
-      await tokenContract.methods.transfer(receiver, 1).send());
-    expect(events).to.deep.equal([
-      {
-        address: collectionIdAddress,
-        event: 'Transfer',
-        args: {
-          from: '0xFFfFfFffFFfffFFfFFfFFFFFffFFFffffFfFFFfF',
-          to: receiver,
-          tokenId: tokenId.toString(),
-        },
-      },
-    ]);
+    const events: any = [];
+    contract.events.allEvents((_: any, event: any) => {
+      events.push(event);
+    });
+    await tokenContract.methods.transfer(receiver, 1).send();
+
+    const event = events[0];
+    expect(event.address).to.equal(collectionAddress);
+    expect(event.returnValues.from).to.equal('0xFFfFfFffFFfffFFfFFfFFFFFffFFFffffFfFFFfF');
+    expect(event.returnValues.to).to.equal(receiver);
+    expect(event.returnValues.tokenId).to.equal(tokenId.toString());
   });
 
-  itWeb3('transfer event on transfer from full ownership to partial ownership', async ({api, web3, privateKeyWrapper}) => {
-    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const receiver = createEthAccount(web3);
-    const helper = evmCollectionHelpers(web3, caller);
-    const result = await helper.methods.createRFTCollection('Mint collection', '6', '6').send();
-    const {collectionIdAddress, collectionId} = await getCollectionAddressFromResult(api, result);
-    const contract = evmCollection(web3, caller, collectionIdAddress, {type: 'ReFungible'});
+  itEth('transfer event on transfer from full ownership to partial ownership', async ({helper}) => {
+    const caller = await helper.eth.createAccountWithBalance(donor);
+    const receiver = helper.eth.createAccount();
+    const {collectionId, collectionAddress} = await helper.eth.createRefungibleCollection(caller, 'Transferry-Full-to-Partial', '6', '6');
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'rft', caller);
 
     const tokenId = await contract.methods.nextTokenId().call();
     await contract.methods.mint(caller, tokenId).send();
 
-    const tokenAddress = tokenIdToAddress(collectionId, tokenId);
-    const tokenContract = uniqueRefungibleToken(web3, tokenAddress, caller);
+    const tokenContract = helper.ethNativeContract.rftTokenById(collectionId, tokenId, caller);
 
     await tokenContract.methods.repartition(2).send();
 
-    const events =  await recordEvents(contract, async () =>
-      await tokenContract.methods.transfer(receiver, 1).send());
+    const events: any = [];
+    contract.events.allEvents((_: any, event: any) => {
+      events.push(event);
+    });
+    await tokenContract.methods.transfer(receiver, 1).send();
 
-    expect(events).to.deep.equal([
-      {
-        address: collectionIdAddress,
-        event: 'Transfer',
-        args: {
-          from: caller,
-          to: '0xFFfFfFffFFfffFFfFFfFFFFFffFFFffffFfFFFfF',
-          tokenId: tokenId.toString(),
-        },
-      },
-    ]);
+    const event = events[0];
+    expect(event.address).to.equal(collectionAddress);
+    expect(event.returnValues.from).to.equal(caller);
+    expect(event.returnValues.to).to.equal('0xFFfFfFffFFfffFFfFFfFFFFFffFFFffffFfFFFfF');
+    expect(event.returnValues.tokenId).to.equal(tokenId.toString());
   });
 });
 
 describe('RFT: Fees', () => {
+  let donor: IKeyringPair;
+
   before(async function() {
-    await requirePallets(this, [Pallets.ReFungible]);
+    await usingEthPlaygrounds(async (helper, privateKey) => {
+      requirePalletsOrSkip(this, helper, [Pallets.ReFungible]);
+
+      donor = privateKey('//Alice');
+    });
   });
 
-  itWeb3('transferFrom() call fee is less than 0.2UNQ', async ({web3, api, privateKeyWrapper}) => {
-    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const helper = evmCollectionHelpers(web3, caller);
-    const result = await helper.methods.createRFTCollection('Mint collection', '6', '6').send();
-    const {collectionIdAddress} = await getCollectionAddressFromResult(api, result);
-    const contract = evmCollection(web3, caller, collectionIdAddress, {type: 'ReFungible'});
-
-    const receiver = createEthAccount(web3);
+  itEth('transferFrom() call fee is less than 0.2UNQ', async ({helper}) => {
+    const caller = await helper.eth.createAccountWithBalance(donor);
+    const receiver = helper.eth.createAccount();
+    const {collectionAddress} = await helper.eth.createRefungibleCollection(caller, 'Feeful-Transfer-From', '6', '6');
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'rft', caller);
 
     const tokenId = await contract.methods.nextTokenId().call();
     await contract.methods.mint(caller, tokenId).send();
 
-    const cost = await recordEthFee(api, caller, () => contract.methods.transferFrom(caller, receiver, tokenId).send());
-    expect(cost < BigInt(0.2 * Number(UNIQUE)));
+    const cost = await helper.eth.recordCallFee(caller, () => contract.methods.transferFrom(caller, receiver, tokenId).send());
+    expect(cost < BigInt(0.2 * Number(helper.balance.getOneTokenNominal())));
     expect(cost > 0n);
   });
 
-  itWeb3('transfer() call fee is less than 0.2UNQ', async ({web3, api, privateKeyWrapper}) => {
-    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const helper = evmCollectionHelpers(web3, caller);
-    const result = await helper.methods.createRFTCollection('Mint collection', '6', '6').send();
-    const {collectionIdAddress} = await getCollectionAddressFromResult(api, result);
-    const contract = evmCollection(web3, caller, collectionIdAddress, {type: 'ReFungible'});
-
-    const receiver = createEthAccount(web3);
+  itEth('transfer() call fee is less than 0.2UNQ', async ({helper}) => {
+    const caller = await helper.eth.createAccountWithBalance(donor);
+    const receiver = helper.eth.createAccount();
+    const {collectionAddress} = await helper.eth.createRefungibleCollection(caller, 'Feeful-Transfer', '6', '6');
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'rft', caller);
 
     const tokenId = await contract.methods.nextTokenId().call();
     await contract.methods.mint(caller, tokenId).send();
 
-    const cost = await recordEthFee(api, caller, () => contract.methods.transfer(receiver, tokenId).send());
-    expect(cost < BigInt(0.2 * Number(UNIQUE)));
+    const cost = await helper.eth.recordCallFee(caller, () => contract.methods.transfer(receiver, tokenId).send());
+    expect(cost < BigInt(0.2 * Number(helper.balance.getOneTokenNominal())));
     expect(cost > 0n);
   });
 });
 
 describe('Common metadata', () => {
+  let donor: IKeyringPair;
+  let alice: IKeyringPair;
+
   before(async function() {
-    await requirePallets(this, [Pallets.ReFungible]);
-  });
+    await usingEthPlaygrounds(async (helper, privateKey) => {
+      requirePalletsOrSkip(this, helper, [Pallets.ReFungible]);
 
-  itWeb3('Returns collection name', async ({api, web3, privateKeyWrapper}) => {
-    const collection = await createCollectionExpectSuccess({
-      name: 'token name',
-      mode: {type: 'ReFungible'},
+      donor = privateKey('//Alice');
+      [alice] = await helper.arrange.createAccounts([20n], donor);
     });
-    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
+  });
 
-    const address = collectionIdToAddress(collection);
-    const contract = evmCollection(web3, caller, address, {type: 'ReFungible'});
+  itEth('Returns collection name', async ({helper}) => {
+    const caller = helper.eth.createAccount();
+    const collection = await helper.rft.mintCollection(alice, {name: 'Leviathan', tokenPrefix: '11'});
+    
+    const contract = helper.ethNativeContract.collectionById(collection.collectionId, 'rft', caller);
     const name = await contract.methods.name().call();
-
-    expect(name).to.equal('token name');
+    expect(name).to.equal('Leviathan');
   });
 
-  itWeb3('Returns symbol name', async ({api, web3, privateKeyWrapper}) => {
-    const collection = await createCollectionExpectSuccess({
-      tokenPrefix: 'TOK',
-      mode: {type: 'ReFungible'},
-    });
-    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-
-    const address = collectionIdToAddress(collection);
-    const contract = evmCollection(web3, caller, address, {type: 'ReFungible'});
+  itEth('Returns symbol name', async ({helper}) => {
+    const caller = await helper.eth.createAccountWithBalance(donor);
+    const {collectionAddress} = await helper.eth.createRefungibleCollection(caller, 'Leviathan', '', '12');
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'rft', caller);
     const symbol = await contract.methods.symbol().call();
-
-    expect(symbol).to.equal('TOK');
+    expect(symbol).to.equal('12');
   });
 });
modifiedtests/src/eth/reFungibleToken.test.tsdiffbeforeafterboth
--- a/tests/src/eth/reFungibleToken.test.ts
+++ b/tests/src/eth/reFungibleToken.test.ts
@@ -14,82 +14,76 @@
 // 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 {approve, createCollection, createRefungibleToken, transfer, transferFrom, UNIQUE, requirePallets, Pallets} from '../util/helpers';
-import {collectionIdToAddress, createEthAccount, createEthAccountWithBalance, createRFTCollection, evmCollection, evmCollectionHelpers, getCollectionAddressFromResult, itWeb3, normalizeEvents, recordEthFee, recordEvents, subToEth, tokenIdToAddress, transferBalanceToEth, uniqueRefungible, uniqueRefungibleToken} from './util/helpers';
+import {Pallets, requirePalletsOrSkip} from '../util/playgrounds';
+import {EthUniqueHelper, expect, itEth, usingEthPlaygrounds} from './util/playgrounds';
+import {IKeyringPair} from '@polkadot/types/types';
+import {Contract} from 'web3-eth-contract';
 
-import chai from 'chai';
-import chaiAsPromised from 'chai-as-promised';
-chai.use(chaiAsPromised);
-const expect = chai.expect;
+describe('Refungible token: Information getting', () => {
+  let donor: IKeyringPair;
+  let alice: IKeyringPair;
 
-describe('Refungible token: Information getting', () => {
   before(async function() {
-    await requirePallets(this, [Pallets.ReFungible]);
-  });
+    await usingEthPlaygrounds(async (helper, privateKey) => {
+      requirePalletsOrSkip(this, helper, [Pallets.ReFungible]);
 
-  itWeb3('totalSupply', async ({api, web3, privateKeyWrapper}) => {
-    const alice = privateKeyWrapper('//Alice');
-
-    const collectionId = (await createCollection(api, alice, {name: 'token name', mode: {type: 'ReFungible'}})).collectionId;
-
-    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
+      donor = privateKey('//Alice');
+      [alice] = await helper.arrange.createAccounts([20n], donor);
+    });
+  });
 
-    const tokenId = (await createRefungibleToken(api, alice, collectionId, 200n, {Ethereum: caller})).itemId;
+  itEth('totalSupply', async ({helper}) => {
+    const caller = await helper.eth.createAccountWithBalance(donor);
+    const collection = await helper.rft.mintCollection(alice, {tokenPrefix: 'MUON'});
+    const {tokenId} = await collection.mintToken(alice, 200n, {Ethereum: caller});
 
-    const address = tokenIdToAddress(collectionId, tokenId);
-    const contract = uniqueRefungibleToken(web3, address, caller);
+    const contract = helper.ethNativeContract.rftTokenById(collection.collectionId, tokenId, caller);
     const totalSupply = await contract.methods.totalSupply().call();
-
     expect(totalSupply).to.equal('200');
   });
 
-  itWeb3('balanceOf', async ({api, web3, privateKeyWrapper}) => {
-    const alice = privateKeyWrapper('//Alice');
-
-    const collectionId = (await createCollection(api, alice, {name: 'token name', mode: {type: 'ReFungible'}})).collectionId;
+  itEth('balanceOf', async ({helper}) => {
+    const caller = await helper.eth.createAccountWithBalance(donor);
+    const collection = await helper.rft.mintCollection(alice, {tokenPrefix: 'MUON'});
+    const {tokenId} = await collection.mintToken(alice, 200n, {Ethereum: caller});
 
-    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-
-    const tokenId = (await createRefungibleToken(api, alice, collectionId, 200n, {Ethereum: caller})).itemId;
-
-    const address = tokenIdToAddress(collectionId, tokenId);
-    const contract = uniqueRefungibleToken(web3, address, caller);
+    const contract = helper.ethNativeContract.rftTokenById(collection.collectionId, tokenId, caller);
     const balance = await contract.methods.balanceOf(caller).call();
-
     expect(balance).to.equal('200');
   });
 
-  itWeb3('decimals', async ({api, web3, privateKeyWrapper}) => {
-    const alice = privateKeyWrapper('//Alice');
+  itEth('decimals', async ({helper}) => {
+    const caller = await helper.eth.createAccountWithBalance(donor);
+    const collection = await helper.rft.mintCollection(alice, {tokenPrefix: 'MUON'});
+    const {tokenId} = await collection.mintToken(alice, 200n, {Ethereum: caller});
 
-    const collectionId = (await createCollection(api, alice, {name: 'token name', mode: {type: 'ReFungible'}})).collectionId;
-
-    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-
-    const tokenId = (await createRefungibleToken(api, alice, collectionId, 200n, {Ethereum: caller})).itemId;
-
-    const address = tokenIdToAddress(collectionId, tokenId);
-    const contract = uniqueRefungibleToken(web3, address, caller);
+    const contract = helper.ethNativeContract.rftTokenById(collection.collectionId, tokenId, caller);
     const decimals = await contract.methods.decimals().call();
-
     expect(decimals).to.equal('0');
   });
 });
 
 // FIXME: Need erc721 for ReFubgible.
 describe('Check ERC721 token URI for ReFungible', () => {
+  let donor: IKeyringPair;
+
   before(async function() {
-    await requirePallets(this, [Pallets.ReFungible]);
+    await usingEthPlaygrounds(async (helper, privateKey) => {
+      requirePalletsOrSkip(this, helper, [Pallets.ReFungible]);
+
+      donor = privateKey('//Alice');
+    });
   });
 
-  itWeb3('Empty tokenURI', async ({web3, api, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const helper = evmCollectionHelpers(web3, owner);
-    let result = await helper.methods.createERC721MetadataCompatibleCollection('Mint collection', '1', '1', '').send();
-    const {collectionIdAddress, collectionId} = await getCollectionAddressFromResult(api, result);
-    const receiver = createEthAccount(web3);
-    const contract = evmCollection(web3, owner, collectionIdAddress, {type: 'ReFungible'});
+  async function setup(helper: EthUniqueHelper, tokenPrefix: string, propertyKey?: string, propertyValue?: string): Promise<{contract: Contract, nextTokenId: string}> {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const receiver = helper.eth.createAccount();
 
+    const collectionHelper = helper.ethNativeContract.collectionHelpers(owner);
+    let result = await collectionHelper.methods.createERC721MetadataCompatibleCollection('Mint collection', 'a', 'b', tokenPrefix).send();
+    const collectionAddress = helper.ethAddress.normalizeAddress(result.events.CollectionCreated.returnValues.collectionId);
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'rft', owner);
+    
     const nextTokenId = await contract.methods.nextTokenId().call();
     expect(nextTokenId).to.be.equal('1');
     result = await contract.methods.mint(
@@ -97,166 +91,71 @@
       nextTokenId,
     ).send();
 
-    const events = normalizeEvents(result.events);
-    const address = collectionIdToAddress(collectionId);
+    if (propertyKey && propertyValue) {
+      // Set URL or suffix
+      await contract.methods.setProperty(nextTokenId, propertyKey, Buffer.from(propertyValue)).send();
+    }
+
+    const event = result.events.Transfer;
+    expect(event.address).to.be.equal(collectionAddress);
+    expect(event.returnValues.from).to.be.equal('0x0000000000000000000000000000000000000000');
+    expect(event.returnValues.to).to.be.equal(receiver);
+    expect(event.returnValues.tokenId).to.be.equal(nextTokenId);
 
-    expect(events).to.be.deep.equal([
-      {
-        address,
-        event: 'Transfer',
-        args: {
-          from: '0x0000000000000000000000000000000000000000',
-          to: receiver,
-          tokenId: nextTokenId,
-        },
-      },
-    ]);
+    return {contract, nextTokenId};
+  }
 
+  itEth('Empty tokenURI', async ({helper}) => {
+    const {contract, nextTokenId} = await setup(helper, '');
     expect(await contract.methods.tokenURI(nextTokenId).call()).to.be.equal('');
   });
-
-  itWeb3('TokenURI from url', async ({web3, api, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const helper = evmCollectionHelpers(web3, owner);
-    let result = await helper.methods.createERC721MetadataCompatibleCollection('Mint collection', '1', '1', 'BaseURI_').send();
-    const {collectionIdAddress, collectionId} = await getCollectionAddressFromResult(api, result);
-    const receiver = createEthAccount(web3);
-    const contract = evmCollection(web3, owner, collectionIdAddress, {type: 'ReFungible'});
 
-    const nextTokenId = await contract.methods.nextTokenId().call();
-    expect(nextTokenId).to.be.equal('1');
-    result = await contract.methods.mint(
-      receiver,
-      nextTokenId,
-    ).send();
-
-    // Set URL
-    await contract.methods.setProperty(nextTokenId, 'url', Buffer.from('Token URI')).send();
-
-    const events = normalizeEvents(result.events);
-    const address = collectionIdToAddress(collectionId);
-
-    expect(events).to.be.deep.equal([
-      {
-        address,
-        event: 'Transfer',
-        args: {
-          from: '0x0000000000000000000000000000000000000000',
-          to: receiver,
-          tokenId: nextTokenId,
-        },
-      },
-    ]);
-
+  itEth('TokenURI from url', async ({helper}) => {
+    const {contract, nextTokenId} = await setup(helper, 'BaseURI_', 'url', 'Token URI');
     expect(await contract.methods.tokenURI(nextTokenId).call()).to.be.equal('Token URI');
   });
-
-  itWeb3('TokenURI from baseURI + tokenId', async ({web3, api, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const helper = evmCollectionHelpers(web3, owner);
-    let result = await helper.methods.createERC721MetadataCompatibleCollection('Mint collection', '1', '1', 'BaseURI_').send();
-    const {collectionIdAddress, collectionId} = await getCollectionAddressFromResult(api, result);
-    const receiver = createEthAccount(web3);
-    const contract = evmCollection(web3, owner, collectionIdAddress, {type: 'ReFungible'});
 
-    const nextTokenId = await contract.methods.nextTokenId().call();
-    expect(nextTokenId).to.be.equal('1');
-    result = await contract.methods.mint(
-      receiver,
-      nextTokenId,
-    ).send();
-
-    const events = normalizeEvents(result.events);
-    const address = collectionIdToAddress(collectionId);
-
-    expect(events).to.be.deep.equal([
-      {
-        address,
-        event: 'Transfer',
-        args: {
-          from: '0x0000000000000000000000000000000000000000',
-          to: receiver,
-          tokenId: nextTokenId,
-        },
-      },
-    ]);
-
+  itEth('TokenURI from baseURI + tokenId', async ({helper}) => {
+    const {contract, nextTokenId} = await setup(helper, 'BaseURI_');
     expect(await contract.methods.tokenURI(nextTokenId).call()).to.be.equal('BaseURI_' + nextTokenId);
   });
 
-  itWeb3('TokenURI from baseURI + suffix', async ({web3, api, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const helper = evmCollectionHelpers(web3, owner);
-    let result = await helper.methods.createERC721MetadataCompatibleCollection('Mint collection', '1', '1', 'BaseURI_').send();
-    const {collectionIdAddress, collectionId} = await getCollectionAddressFromResult(api, result);
-    const receiver = createEthAccount(web3);
-    const contract = evmCollection(web3, owner, collectionIdAddress, {type: 'ReFungible'});
-
-    const nextTokenId = await contract.methods.nextTokenId().call();
-    expect(nextTokenId).to.be.equal('1');
-    result = await contract.methods.mint(
-      receiver,
-      nextTokenId,
-    ).send();
-
-    // Set suffix
+  itEth('TokenURI from baseURI + suffix', async ({helper}) => {
     const suffix = '/some/suffix';
-    await contract.methods.setProperty(nextTokenId, 'suffix', Buffer.from(suffix)).send();
-
-    const events = normalizeEvents(result.events);
-    const address = collectionIdToAddress(collectionId);
-
-    expect(events).to.be.deep.equal([
-      {
-        address,
-        event: 'Transfer',
-        args: {
-          from: '0x0000000000000000000000000000000000000000',
-          to: receiver,
-          tokenId: nextTokenId,
-        },
-      },
-    ]);
-
+    const {contract, nextTokenId} = await setup(helper, 'BaseURI_', 'suffix', suffix);
     expect(await contract.methods.tokenURI(nextTokenId).call()).to.be.equal('BaseURI_' + suffix);
   });
 });
 
 describe('Refungible: Plain calls', () => {
+  let donor: IKeyringPair;
+  let alice: IKeyringPair;
+
   before(async function() {
-    await requirePallets(this, [Pallets.ReFungible]);
+    await usingEthPlaygrounds(async (helper, privateKey) => {
+      requirePalletsOrSkip(this, helper, [Pallets.ReFungible]);
+
+      donor = privateKey('//Alice');
+      [alice] = await helper.arrange.createAccounts([50n], donor);
+    });
   });
 
-  itWeb3('Can perform approve()', async ({web3, api, privateKeyWrapper}) => {
-    const alice = privateKeyWrapper('//Alice');
+  itEth('Can perform approve()', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const spender = helper.eth.createAccount();
+    const collection = await helper.rft.mintCollection(alice);
+    const {tokenId} = await collection.mintToken(alice, 200n, {Ethereum: owner});
 
-    const collectionId = (await createCollection(api, alice, {name: 'token name', mode: {type: 'ReFungible'}})).collectionId;
-
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-
-    const tokenId = (await createRefungibleToken(api, alice, collectionId, 200n, {Ethereum: owner})).itemId;
-
-    const address = tokenIdToAddress(collectionId, tokenId);
+    const tokenAddress = helper.ethAddress.fromTokenId(collection.collectionId, tokenId);
+    const contract = helper.ethNativeContract.rftToken(tokenAddress, owner);
 
-    const spender = createEthAccount(web3);
-
-    const contract = uniqueRefungibleToken(web3, address, owner);
-
     {
       const result = await contract.methods.approve(spender, 100).send({from: owner});
-      const events = normalizeEvents(result.events);
-
-      expect(events).to.be.deep.equal([
-        {
-          address,
-          event: 'Approval',
-          args: {
-            owner,
-            spender,
-            value: '100',
-          },
-        },
-      ]);
+      const event = result.events.Approval;
+      expect(event.address).to.be.equal(tokenAddress);
+      expect(event.returnValues.owner).to.be.equal(owner);
+      expect(event.returnValues.spender).to.be.equal(spender);
+      expect(event.returnValues.value).to.be.equal('100');
     }
 
     {
@@ -265,49 +164,31 @@
     }
   });
 
-  itWeb3('Can perform transferFrom()', async ({web3, api, privateKeyWrapper}) => {
-    const alice = privateKeyWrapper('//Alice');
-
-    const collectionId = (await createCollection(api, alice, {name: 'token name', mode: {type: 'ReFungible'}})).collectionId;
+  itEth('Can perform transferFrom()', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const spender = await helper.eth.createAccountWithBalance(donor);
+    const receiver = helper.eth.createAccount();
+    const collection = await helper.rft.mintCollection(alice);
+    const {tokenId} = await collection.mintToken(alice, 200n, {Ethereum: owner});
 
-    const owner = createEthAccount(web3);
-    await transferBalanceToEth(api, alice, owner);
-
-    const tokenId = (await createRefungibleToken(api, alice, collectionId, 200n, {Ethereum: owner})).itemId;
-
-    const spender = createEthAccount(web3);
-    await transferBalanceToEth(api, alice, spender);
+    const tokenAddress = helper.ethAddress.fromTokenId(collection.collectionId, tokenId);
+    const contract = helper.ethNativeContract.rftToken(tokenAddress, owner);
 
-    const receiver = createEthAccount(web3);
-
-    const address = tokenIdToAddress(collectionId, tokenId);
-    const contract = uniqueRefungibleToken(web3, address, owner);
-
     await contract.methods.approve(spender, 100).send();
 
     {
       const result = await contract.methods.transferFrom(owner, receiver, 49).send({from: spender});
-      const events = normalizeEvents(result.events);
-      expect(events).to.include.deep.members([
-        {
-          address,
-          event: 'Transfer',
-          args: {
-            from: owner,
-            to: receiver,
-            value: '49',
-          },
-        },
-        {
-          address,
-          event: 'Approval',
-          args: {
-            owner,
-            spender,
-            value: '51',
-          },
-        },
-      ]);
+      let event = result.events.Transfer;
+      expect(event.address).to.be.equal(tokenAddress);
+      expect(event.returnValues.from).to.be.equal(owner);
+      expect(event.returnValues.to).to.be.equal(receiver);
+      expect(event.returnValues.value).to.be.equal('49');
+
+      event = result.events.Approval;
+      expect(event.address).to.be.equal(tokenAddress);
+      expect(event.returnValues.owner).to.be.equal(owner);
+      expect(event.returnValues.spender).to.be.equal(spender);
+      expect(event.returnValues.value).to.be.equal('51');
     }
 
     {
@@ -321,36 +202,22 @@
     }
   });
 
-  itWeb3('Can perform transfer()', async ({web3, api, privateKeyWrapper}) => {
-    const alice = privateKeyWrapper('//Alice');
+  itEth('Can perform transfer()', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const receiver = helper.eth.createAccount();
+    const collection = await helper.rft.mintCollection(alice);
+    const {tokenId} = await collection.mintToken(alice, 200n, {Ethereum: owner});
 
-    const collectionId = (await createCollection(api, alice, {name: 'token name', mode: {type: 'ReFungible'}})).collectionId;
-
-    const owner = createEthAccount(web3);
-    await transferBalanceToEth(api, alice, owner);
-
-    const tokenId = (await createRefungibleToken(api, alice, collectionId, 200n, {Ethereum: owner})).itemId;
-
-    const receiver = createEthAccount(web3);
-    await transferBalanceToEth(api, alice, receiver);
-
-    const address = tokenIdToAddress(collectionId, tokenId);
-    const contract = uniqueRefungibleToken(web3, address, owner);
+    const tokenAddress = helper.ethAddress.fromTokenId(collection.collectionId, tokenId);
+    const contract = helper.ethNativeContract.rftToken(tokenAddress, owner);
 
     {
       const result = await contract.methods.transfer(receiver, 50).send({from: owner});
-      const events = normalizeEvents(result.events);
-      expect(events).to.include.deep.members([
-        {
-          address,
-          event: 'Transfer',
-          args: {
-            from: owner,
-            to: receiver,
-            value: '50',
-          },
-        },
-      ]);
+      const event = result.events.Transfer;
+      expect(event.address).to.be.equal(tokenAddress);
+      expect(event.returnValues.from).to.be.equal(owner);
+      expect(event.returnValues.to).to.be.equal(receiver);
+      expect(event.returnValues.value).to.be.equal('50');
     }
 
     {
@@ -364,311 +231,262 @@
     }
   });
 
-  itWeb3('Can perform repartition()', async ({web3, api, privateKeyWrapper}) => {
-    const alice = privateKeyWrapper('//Alice');
-
-    const collectionId = (await createCollection(api, alice, {name: 'token name', mode: {type: 'ReFungible'}})).collectionId;
+  itEth('Can perform repartition()', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const receiver = await helper.eth.createAccountWithBalance(donor);
+    const collection = await helper.rft.mintCollection(alice);
+    const {tokenId} = await collection.mintToken(alice, 100n, {Ethereum: owner});
 
-    const owner = createEthAccount(web3);
-    await transferBalanceToEth(api, alice, owner);
+    const tokenAddress = helper.ethAddress.fromTokenId(collection.collectionId, tokenId);
+    const contract = helper.ethNativeContract.rftToken(tokenAddress, owner);
 
-    const receiver = createEthAccount(web3);
-    await transferBalanceToEth(api, alice, receiver);
-
-    const tokenId = (await createRefungibleToken(api, alice, collectionId, 100n, {Ethereum: owner})).itemId;
-
-    const address = tokenIdToAddress(collectionId, tokenId);
-    const contract = uniqueRefungibleToken(web3, address, owner);
-
     await contract.methods.repartition(200).send({from: owner});
     expect(+await contract.methods.balanceOf(owner).call()).to.be.equal(200);
     await contract.methods.transfer(receiver, 110).send({from: owner});
     expect(+await contract.methods.balanceOf(owner).call()).to.be.equal(90);
     expect(+await contract.methods.balanceOf(receiver).call()).to.be.equal(110);
 
-    await expect(contract.methods.repartition(80).send({from: owner})).to.eventually.be.rejected;
+    await expect(contract.methods.repartition(80).send({from: owner})).to.eventually.be.rejected; // Transaction is reverted
 
     await contract.methods.transfer(receiver, 90).send({from: owner});
     expect(+await contract.methods.balanceOf(owner).call()).to.be.equal(0);
     expect(+await contract.methods.balanceOf(receiver).call()).to.be.equal(200);
 
     await contract.methods.repartition(150).send({from: receiver});
-    await expect(contract.methods.transfer(owner, 160).send({from: receiver})).to.eventually.be.rejected;
+    await expect(contract.methods.transfer(owner, 160).send({from: receiver})).to.eventually.be.rejected; // Transaction is reverted
     expect(+await contract.methods.balanceOf(receiver).call()).to.be.equal(150);
   });
 
-  itWeb3('Can repartition with increased amount', async ({web3, api, privateKeyWrapper}) => {
-    const alice = privateKeyWrapper('//Alice');
-
-    const collectionId = (await createCollection(api, alice, {name: 'token name', mode: {type: 'ReFungible'}})).collectionId;
-
-    const owner = createEthAccount(web3);
-    await transferBalanceToEth(api, alice, owner);
-
-    const tokenId = (await createRefungibleToken(api, alice, collectionId, 100n, {Ethereum: owner})).itemId;
+  itEth('Can repartition with increased amount', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const collection = await helper.rft.mintCollection(alice);
+    const {tokenId} = await collection.mintToken(alice, 100n, {Ethereum: owner});
 
-    const address = tokenIdToAddress(collectionId, tokenId);
-    const contract = uniqueRefungibleToken(web3, address, owner);
+    const tokenAddress = helper.ethAddress.fromTokenId(collection.collectionId, tokenId);
+    const contract = helper.ethNativeContract.rftToken(tokenAddress, owner);
 
     const result = await contract.methods.repartition(200).send();
-    const events = normalizeEvents(result.events);
 
-    expect(events).to.deep.equal([
-      {
-        address,
-        event: 'Transfer',
-        args: {
-          from: '0x0000000000000000000000000000000000000000',
-          to: owner,
-          value: '100',
-        },
-      },
-    ]);
+    const event = result.events.Transfer;
+    expect(event.address).to.be.equal(tokenAddress);
+    expect(event.returnValues.from).to.be.equal('0x0000000000000000000000000000000000000000');
+    expect(event.returnValues.to).to.be.equal(owner);
+    expect(event.returnValues.value).to.be.equal('100');
   });
 
-  itWeb3('Can repartition with decreased amount', async ({web3, api, privateKeyWrapper}) => {
-    const alice = privateKeyWrapper('//Alice');
+  itEth('Can repartition with decreased amount', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const collection = await helper.rft.mintCollection(alice);
+    const {tokenId} = await collection.mintToken(alice, 100n, {Ethereum: owner});
 
-    const collectionId = (await createCollection(api, alice, {name: 'token name', mode: {type: 'ReFungible'}})).collectionId;
-
-    const owner = createEthAccount(web3);
-    await transferBalanceToEth(api, alice, owner);
-
-    const tokenId = (await createRefungibleToken(api, alice, collectionId, 100n, {Ethereum: owner})).itemId;
-
-    const address = tokenIdToAddress(collectionId, tokenId);
-    const contract = uniqueRefungibleToken(web3, address, owner);
+    const tokenAddress = helper.ethAddress.fromTokenId(collection.collectionId, tokenId);
+    const contract = helper.ethNativeContract.rftToken(tokenAddress, owner);
 
     const result = await contract.methods.repartition(50).send();
-    const events = normalizeEvents(result.events);
-    expect(events).to.deep.equal([
-      {
-        address,
-        event: 'Transfer',
-        args: {
-          from: owner,
-          to: '0x0000000000000000000000000000000000000000',
-          value: '50',
-        },
-      },
-    ]);
+    const event = result.events.Transfer;
+    expect(event.address).to.be.equal(tokenAddress);
+    expect(event.returnValues.from).to.be.equal(owner);
+    expect(event.returnValues.to).to.be.equal('0x0000000000000000000000000000000000000000');
+    expect(event.returnValues.value).to.be.equal('50');
   });
 
-  itWeb3('Receiving Transfer event on burning into full ownership', async ({web3, api, privateKeyWrapper}) => {
-    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const receiver = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const helper = evmCollectionHelpers(web3, caller);
-    const result = await helper.methods.createRFTCollection('Mint collection', '6', '6').send();
-    const {collectionIdAddress, collectionId} = await getCollectionAddressFromResult(api, result);
-    const contract = evmCollection(web3, caller, collectionIdAddress, {type: 'ReFungible'});
+  itEth('Receiving Transfer event on burning into full ownership', async ({helper}) => {
+    const caller = await helper.eth.createAccountWithBalance(donor);
+    const receiver = await helper.eth.createAccountWithBalance(donor);
+    const {collectionId, collectionAddress} = await helper.eth.createRefungibleCollection(caller, 'Devastation', '6', '6');
+    const contract = helper.ethNativeContract.collection(collectionAddress, 'rft', caller);
 
     const tokenId = await contract.methods.nextTokenId().call();
     await contract.methods.mint(caller, tokenId).send();
+    const tokenAddress = helper.ethAddress.fromTokenId(collectionId, tokenId);
+    const tokenContract = helper.ethNativeContract.rftToken(tokenAddress, caller);
 
-    const address = tokenIdToAddress(collectionId, tokenId);
-
-    const tokenContract =  uniqueRefungibleToken(web3, address, caller);
     await tokenContract.methods.repartition(2).send();
     await tokenContract.methods.transfer(receiver, 1).send();
 
-    const events =  await recordEvents(contract, async () =>
-      await tokenContract.methods.burnFrom(caller, 1).send());
-    expect(events).to.deep.equal([
-      {
-        address: collectionIdAddress,
-        event: 'Transfer',
-        args: {
-          from: '0xFFfFfFffFFfffFFfFFfFFFFFffFFFffffFfFFFfF',
-          to: receiver,
-          tokenId,
-        },
-      },
-    ]);
+    const events: any = [];
+    contract.events.allEvents((_: any, event: any) => {
+      events.push(event);
+    });
+    await tokenContract.methods.burnFrom(caller, 1).send();
+
+    const event = events[0];
+    expect(event.address).to.be.equal(collectionAddress);
+    expect(event.returnValues.from).to.be.equal('0xFFfFfFffFFfffFFfFFfFFFFFffFFFffffFfFFFfF');
+    expect(event.returnValues.to).to.be.equal(receiver);
+    expect(event.returnValues.tokenId).to.be.equal(tokenId);
   });
 });
 
 describe('Refungible: Fees', () => {
+  let donor: IKeyringPair;
+  let alice: IKeyringPair;
+
   before(async function() {
-    await requirePallets(this, [Pallets.ReFungible]);
+    await usingEthPlaygrounds(async (helper, privateKey) => {
+      requirePalletsOrSkip(this, helper, [Pallets.ReFungible]);
+
+      donor = privateKey('//Alice');
+      [alice] = await helper.arrange.createAccounts([50n], donor);
+    });
   });
 
-  itWeb3('approve() call fee is less than 0.2UNQ', async ({web3, api, privateKeyWrapper}) => {
-    const alice = privateKeyWrapper('//Alice');
+  itEth('approve() call fee is less than 0.2UNQ', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const spender = helper.eth.createAccount();
+    const collection = await helper.rft.mintCollection(alice);
+    const {tokenId} = await collection.mintToken(alice, 100n, {Ethereum: owner});
 
-    const collectionId = (await createCollection(api, alice, {mode: {type: 'ReFungible'}})).collectionId;
+    const tokenAddress = helper.ethAddress.fromTokenId(collection.collectionId, tokenId);
+    const contract = helper.ethNativeContract.rftToken(tokenAddress, owner);
 
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const spender = createEthAccount(web3);
-
-    const tokenId = (await createRefungibleToken(api, alice, collectionId, 200n, {Ethereum: owner})).itemId;
-
-    const address = tokenIdToAddress(collectionId, tokenId);
-    const contract = uniqueRefungibleToken(web3, address, owner);
-
-    const cost = await recordEthFee(api, owner, () => contract.methods.approve(spender, 100).send({from: owner}));
-    expect(cost < BigInt(0.2 * Number(UNIQUE)));
+    const cost = await helper.eth.recordCallFee(owner, () => contract.methods.approve(spender, 100).send({from: owner}));
+    expect(cost < BigInt(0.2 * Number(helper.balance.getOneTokenNominal())));
   });
 
-  itWeb3('transferFrom() call fee is less than 0.2UNQ', async ({web3, api, privateKeyWrapper}) => {
-    const alice = privateKeyWrapper('//Alice');
-
-    const collectionId = (await createCollection(api, alice, {mode: {type: 'ReFungible'}})).collectionId;
-
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const spender = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-
-    const tokenId = (await createRefungibleToken(api, alice, collectionId, 200n, {Ethereum: owner})).itemId;
+  itEth('transferFrom() call fee is less than 0.2UNQ', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const spender = await helper.eth.createAccountWithBalance(donor);
+    const collection = await helper.rft.mintCollection(alice);
+    const {tokenId} = await collection.mintToken(alice, 200n, {Ethereum: owner});
 
-    const address = tokenIdToAddress(collectionId, tokenId);
-    const contract = uniqueRefungibleToken(web3, address, owner);
+    const tokenAddress = helper.ethAddress.fromTokenId(collection.collectionId, tokenId);
+    const contract = helper.ethNativeContract.rftToken(tokenAddress, owner);
 
     await contract.methods.approve(spender, 100).send({from: owner});
 
-    const cost = await recordEthFee(api, spender, () => contract.methods.transferFrom(owner, spender, 100).send({from: spender}));
-    expect(cost < BigInt(0.2 * Number(UNIQUE)));
+    const cost = await helper.eth.recordCallFee(spender, () => contract.methods.transferFrom(owner, spender, 100).send({from: spender}));
+    expect(cost < BigInt(0.2 * Number(helper.balance.getOneTokenNominal())));
   });
 
-  itWeb3('transfer() call fee is less than 0.2UNQ', async ({web3, api, privateKeyWrapper}) => {
-    const alice = privateKeyWrapper('//Alice');
+  itEth('transfer() call fee is less than 0.2UNQ', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
+    const receiver = helper.eth.createAccount();
+    const collection = await helper.rft.mintCollection(alice);
+    const {tokenId} = await collection.mintToken(alice, 200n, {Ethereum: owner});
 
-    const collectionId = (await createCollection(api, alice, {mode: {type: 'ReFungible'}})).collectionId;
+    const tokenAddress = helper.ethAddress.fromTokenId(collection.collectionId, tokenId);
+    const contract = helper.ethNativeContract.rftToken(tokenAddress, owner);
 
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
-    const receiver = createEthAccount(web3);
-
-    const tokenId = (await createRefungibleToken(api, alice, collectionId, 200n, {Ethereum: owner})).itemId;
-
-    const address = tokenIdToAddress(collectionId, tokenId);
-    const contract = uniqueRefungibleToken(web3, address, owner);
-
-    const cost = await recordEthFee(api, owner, () => contract.methods.transfer(receiver, 100).send({from: owner}));
-    expect(cost < BigInt(0.2 * Number(UNIQUE)));
+    const cost = await helper.eth.recordCallFee(owner, () => contract.methods.transfer(receiver, 100).send({from: owner}));
+    expect(cost < BigInt(0.2 * Number(helper.balance.getOneTokenNominal())));
   });
 });
 
 describe('Refungible: Substrate calls', () => {
+  let donor: IKeyringPair;
+  let alice: IKeyringPair;
+
   before(async function() {
-    await requirePallets(this, [Pallets.ReFungible]);
-  });
+    await usingEthPlaygrounds(async (helper, privateKey) => {
+      requirePalletsOrSkip(this, helper, [Pallets.ReFungible]);
 
-  itWeb3('Events emitted for approve()', async ({web3, api, privateKeyWrapper}) => {
-    const alice = privateKeyWrapper('//Alice');
-
-    const collectionId = (await createCollection(api, alice, {mode: {type: 'ReFungible'}})).collectionId;
-
-    const receiver = createEthAccount(web3);
+      donor = privateKey('//Alice');
+      [alice] = await helper.arrange.createAccounts([50n], donor);
+    });
+  });
 
-    const tokenId = (await createRefungibleToken(api, alice, collectionId, 200n)).itemId;
+  itEth('Events emitted for approve()', async ({helper}) => {
+    const receiver = helper.eth.createAccount();
+    const collection = await helper.rft.mintCollection(alice);
+    const token = await collection.mintToken(alice, 200n);
 
-    const address = tokenIdToAddress(collectionId, tokenId);
-    const contract = uniqueRefungibleToken(web3, address);
+    const tokenAddress = helper.ethAddress.fromTokenId(collection.collectionId, token.tokenId);
+    const contract = helper.ethNativeContract.rftToken(tokenAddress);
 
-    const events = await recordEvents(contract, async () => {
-      expect(await approve(api, collectionId, tokenId, alice, {Ethereum: receiver}, 100n)).to.be.true;
+    const events: any = [];
+    contract.events.allEvents((_: any, event: any) => {
+      events.push(event);
     });
+    expect(await token.approve(alice, {Ethereum: receiver}, 100n)).to.be.true;
 
-    expect(events).to.be.deep.equal([
-      {
-        address,
-        event: 'Approval',
-        args: {
-          owner: subToEth(alice.address),
-          spender: receiver,
-          value: '100',
-        },
-      },
-    ]);
+    const event = events[0];
+    expect(event.event).to.be.equal('Approval');
+    expect(event.address).to.be.equal(tokenAddress);
+    expect(event.returnValues.owner).to.be.equal(helper.address.substrateToEth(alice.address));
+    expect(event.returnValues.spender).to.be.equal(receiver);
+    expect(event.returnValues.value).to.be.equal('100');
   });
 
-  itWeb3('Events emitted for transferFrom()', async ({web3, api, privateKeyWrapper}) => {
-    const alice = privateKeyWrapper('//Alice');
+  itEth('Events emitted for transferFrom()', async ({helper}) => {
+    const [bob] = await helper.arrange.createAccounts([10n], donor);
+    const receiver = helper.eth.createAccount();
+    const collection = await helper.rft.mintCollection(alice);
+    const token = await collection.mintToken(alice, 200n);
+    await token.approve(alice, {Substrate: bob.address}, 100n);
 
-    const collectionId = (await createCollection(api, alice, {mode: {type: 'ReFungible'}})).collectionId;
-    const bob = privateKeyWrapper('//Bob');
+    const tokenAddress = helper.ethAddress.fromTokenId(collection.collectionId, token.tokenId);
+    const contract = helper.ethNativeContract.rftToken(tokenAddress);
 
-    const receiver = createEthAccount(web3);
+    const events: any = [];
+    contract.events.allEvents((_: any, event: any) => {
+      events.push(event);
+    });
 
-    const tokenId = (await createRefungibleToken(api, alice, collectionId, 200n)).itemId;
-    expect(await approve(api, collectionId, tokenId, alice, bob.address, 100n)).to.be.true;
+    expect(await token.transferFrom(bob, {Substrate: alice.address}, {Ethereum: receiver},  51n)).to.be.true;
 
-    const address = tokenIdToAddress(collectionId, tokenId);
-    const contract = uniqueRefungibleToken(web3, address);
+    let event = events[0];
+    expect(event.event).to.be.equal('Transfer');
+    expect(event.address).to.be.equal(tokenAddress);
+    expect(event.returnValues.from).to.be.equal(helper.address.substrateToEth(alice.address));
+    expect(event.returnValues.to).to.be.equal(receiver);
+    expect(event.returnValues.value).to.be.equal('51');
 
-    const events = await recordEvents(contract, async () => {
-      expect(await transferFrom(api, collectionId, tokenId, bob, alice, {Ethereum: receiver},  51n)).to.be.true;
-    });
-
-    expect(events).to.be.deep.equal([
-      {
-        address,
-        event: 'Transfer',
-        args: {
-          from: subToEth(alice.address),
-          to: receiver,
-          value: '51',
-        },
-      },
-      {
-        address,
-        event: 'Approval',
-        args: {
-          owner: subToEth(alice.address),
-          spender: subToEth(bob.address),
-          value: '49',
-        },
-      },
-    ]);
+    event = events[1];
+    expect(event.event).to.be.equal('Approval');
+    expect(event.address).to.be.equal(tokenAddress);
+    expect(event.returnValues.owner).to.be.equal(helper.address.substrateToEth(alice.address));
+    expect(event.returnValues.spender).to.be.equal(helper.address.substrateToEth(bob.address));
+    expect(event.returnValues.value).to.be.equal('49');
   });
 
-  itWeb3('Events emitted for transfer()', async ({web3, api, privateKeyWrapper}) => {
-    const alice = privateKeyWrapper('//Alice');
+  itEth('Events emitted for transfer()', async ({helper}) => {
+    const receiver = helper.eth.createAccount();
+    const collection = await helper.rft.mintCollection(alice);
+    const token = await collection.mintToken(alice, 200n);
 
-    const collectionId = (await createCollection(api, alice, {mode: {type: 'ReFungible'}})).collectionId;
+    const tokenAddress = helper.ethAddress.fromTokenId(collection.collectionId, token.tokenId);
+    const contract = helper.ethNativeContract.rftToken(tokenAddress);
 
-    const receiver = createEthAccount(web3);
-
-    const tokenId = (await createRefungibleToken(api, alice, collectionId, 200n)).itemId;
+    const events: any = [];
+    contract.events.allEvents((_: any, event: any) => {
+      events.push(event);
+    });
 
-    const address = tokenIdToAddress(collectionId, tokenId);
-    const contract = uniqueRefungibleToken(web3, address);
+    expect(await token.transfer(alice, {Ethereum: receiver},  51n)).to.be.true;
 
-    const events = await recordEvents(contract, async () => {
-      expect(await transfer(api, collectionId, tokenId, alice, {Ethereum: receiver},  51n)).to.be.true;
-    });
-
-    expect(events).to.be.deep.equal([
-      {
-        address,
-        event: 'Transfer',
-        args: {
-          from: subToEth(alice.address),
-          to: receiver,
-          value: '51',
-        },
-      },
-    ]);
+    const event = events[0];
+    expect(event.event).to.be.equal('Transfer');
+    expect(event.address).to.be.equal(tokenAddress);
+    expect(event.returnValues.from).to.be.equal(helper.address.substrateToEth(alice.address));
+    expect(event.returnValues.to).to.be.equal(receiver);
+    expect(event.returnValues.value).to.be.equal('51');
   });
 });
 
 describe('ERC 1633 implementation', () => {
+  let donor: IKeyringPair;
+
   before(async function() {
-    await requirePallets(this, [Pallets.ReFungible]);
-  });
+    await usingEthPlaygrounds(async (helper, privateKey) => {
+      requirePalletsOrSkip(this, helper, [Pallets.ReFungible]);
 
-  itWeb3('Default parent token address and id', async ({api, web3, privateKeyWrapper}) => {
-    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
+      donor = privateKey('//Alice');
+    });
+  });
 
-    const {collectionIdAddress, collectionId} = await createRFTCollection(api, web3, owner);
-    const refungibleContract = uniqueRefungible(web3, collectionIdAddress, owner);
-    const refungibleTokenId = await refungibleContract.methods.nextTokenId().call();
-    await refungibleContract.methods.mint(owner, refungibleTokenId).send();
+  itEth('Default parent token address and id', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor);
 
-    const rftTokenAddress = tokenIdToAddress(collectionId, refungibleTokenId);
-    const refungibleTokenContract = uniqueRefungibleToken(web3, rftTokenAddress, owner);
+    const {collectionId, collectionAddress} = await helper.eth.createRefungibleCollection(owner, 'Sands', '', 'GRAIN');
+    const collectionContract = helper.ethNativeContract.collection(collectionAddress, 'rft', owner);
+    
+    const tokenId = await collectionContract.methods.nextTokenId().call();
+    await collectionContract.methods.mint(owner, tokenId).send();
+    const tokenAddress = helper.ethAddress.fromTokenId(collectionId, tokenId);
+    const tokenContract = helper.ethNativeContract.rftToken(tokenAddress, owner);
 
-    const tokenAddress = await refungibleTokenContract.methods.parentToken().call();
-    const tokenId = await refungibleTokenContract.methods.parentTokenId().call();
-    expect(tokenAddress).to.be.equal(collectionIdAddress);
-    expect(tokenId).to.be.equal(refungibleTokenId);
+    expect(await tokenContract.methods.parentToken().call()).to.be.equal(collectionAddress);
+    expect(await tokenContract.methods.parentTokenId().call()).to.be.equal(tokenId);
   });
 });
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
@@ -116,13 +116,17 @@
     return new web3.eth.Contract(abi as any, address, {gas: this.helper.eth.DEFAULT_GAS, ...(caller ? {from: caller} : {})});
   }
 
-  rftTokenByAddress(address: string, caller?: string): Contract {
+  collectionById(collectionId: number, mode: 'nft' | 'rft' | 'ft', caller?: string): Contract {
+    return this.collection(this.helper.ethAddress.fromCollectionId(collectionId), mode, caller);
+  }
+
+  rftToken(address: string, caller?: string): Contract {
     const web3 = this.helper.getWeb3();
     return new web3.eth.Contract(refungibleTokenAbi as any, address, {gas: this.helper.eth.DEFAULT_GAS, ...(caller ? {from: caller} : {})});
   }
 
-  rftToken(collectionId: number, tokenId: number, caller?: string): Contract {
-    return this.rftTokenByAddress(this.helper.ethAddress.fromTokenId(collectionId, tokenId), caller);
+  rftTokenById(collectionId: number, tokenId: number, caller?: string): Contract {
+    return this.rftToken(this.helper.ethAddress.fromTokenId(collectionId, tokenId), caller);
   }
 }
 
@@ -171,6 +175,17 @@
     return {collectionId, collectionAddress};
   }
 
+  async createRefungibleCollection(signer: string, name: string, description: string, tokenPrefix: string): Promise<{collectionId: number, collectionAddress: string}> {
+    const collectionHelper = this.helper.ethNativeContract.collectionHelpers(signer);
+        
+    const result = await collectionHelper.methods.createRFTCollection(name, description, tokenPrefix).send();
+
+    const collectionAddress = this.helper.ethAddress.normalizeAddress(result.events.CollectionCreated.returnValues.collectionId);
+    const collectionId = this.helper.ethAddress.extractCollectionId(collectionAddress);
+
+    return {collectionId, collectionAddress};
+  }
+
   async deployCollectorContract(signer: string): Promise<Contract> {
     return await this.helper.ethContract.deployByCode(signer, 'Collector', `
     // SPDX-License-Identifier: UNLICENSED
@@ -215,6 +230,16 @@
     }
   `);
   }
+
+  async recordCallFee(user: string, call: () => Promise<any>): Promise<bigint> {
+    const before = await this.helper.balance.getEthereum(user);
+    await call();
+    // In dev mode, the transaction might not finish processing in time
+    await this.helper.wait.newBlocks(1);
+    const after = await this.helper.balance.getEthereum(user);
+
+    return before - after;
+  }
 }  
   
 class EthAddressGroup extends EthGroupBase {