git.delta.rocks / unique-network / refs/commits / c07446fc926e

--- a/tests/src/eth/collectionAdmin.test.ts
+++ b/tests/src/eth/collectionAdmin.test.ts
@@ -239,19 +239,29 @@
     const owner = await helper.eth.createAccountWithBalance(donor);
     const {collectionAddress, collectionId} = await helper.eth.createNFTCollection(owner, 'A', 'B', 'C');
 
-    const [newAdmin] = await helper.arrange.createAccounts([10n], donor);
-    const newAdminCross = helper.ethCrossAccount.fromKeyringPair(newAdmin);
+    const [adminSub] = await helper.arrange.createAccounts([10n], donor);
+    const adminEth = (await helper.eth.createAccountWithBalance(donor)).toLowerCase();
+    const adminCrossSub = helper.ethCrossAccount.fromKeyringPair(adminSub);
+    const adminCrossEth = helper.ethCrossAccount.fromAddress(adminEth);
+
     const collectionEvm = helper.ethNativeContract.collection(collectionAddress, 'nft', owner);
-    await collectionEvm.methods.addCollectionAdminCross(newAdminCross).send();
+    await collectionEvm.methods.addCollectionAdminCross(adminCrossSub).send();
+    await collectionEvm.methods.addCollectionAdminCross(adminCrossEth).send();
+
     {
-      const adminList = await helper.callRpc('api.rpc.unique.adminlist', [collectionId]);
-      expect(adminList[0].asSubstrate.toString().toLocaleLowerCase())
-        .to.be.eq(newAdmin.address.toLocaleLowerCase());
+      const adminList = await helper.collection.getAdmins(collectionId);
+      expect(adminList).to.deep.include({Substrate: adminSub.address});
+      expect(adminList).to.deep.include({Ethereum: adminEth});
     }
 
-    await collectionEvm.methods.removeCollectionAdminCross(newAdminCross).send();
-    const adminList = await helper.callRpc('api.rpc.unique.adminlist', [collectionId]);
+    await collectionEvm.methods.removeCollectionAdminCross(adminCrossSub).send();
+    await collectionEvm.methods.removeCollectionAdminCross(adminCrossEth).send();
+    const adminList = await helper.collection.getAdmins(collectionId);
     expect(adminList.length).to.be.eq(0);
+
+    // Non admin cannot mint:
+    await expect(helper.nft.mintToken(adminSub, {collectionId, owner: {Substrate: adminSub.address}})).to.be.rejectedWith(/common.PublicMintingNotAllowed/);
+    await expect(collectionEvm.methods.mint(adminEth).send({from: adminEth})).to.be.rejected;
   });
 
   // Soft-deprecated
@@ -395,16 +405,27 @@
 
   itEth('Change owner [cross]', async ({helper}) => {
     const owner = await helper.eth.createAccountWithBalance(donor);
-    const [newOwner] = await helper.arrange.createAccounts([10n], donor);
-    const newOwnerCross = helper.ethCrossAccount.fromKeyringPair(newOwner);
-    const {collectionAddress} = await helper.eth.createNFTCollection(owner, 'A', 'B', 'C');
-    const collectionEvm = helper.ethNativeContract.collection(collectionAddress, 'nft', owner);
+    const ownerEth = await helper.eth.createAccountWithBalance(donor);
+    const ownerCrossEth = helper.ethCrossAccount.fromAddress(ownerEth);
+    const [ownerSub] = await helper.arrange.createAccounts([10n], donor);
+    const ownerCrossSub = helper.ethCrossAccount.fromKeyringPair(ownerSub);
 
-    expect(await collectionEvm.methods.isOwnerOrAdminCross(newOwnerCross).call()).to.be.false;
+    const {collectionAddress, collectionId} = await helper.eth.createNFTCollection(owner, 'A', 'B', 'C');
+    const collectionEvm = helper.ethNativeContract.collection(collectionAddress, 'nft', owner);
 
-    await collectionEvm.methods.changeCollectionOwnerCross(newOwnerCross).send();
+    expect(await collectionEvm.methods.isOwnerOrAdminCross(ownerCrossSub).call()).to.be.false;
 
-    expect(await collectionEvm.methods.isOwnerOrAdminCross(newOwnerCross).call()).to.be.true;
+    // Can set ethereum owner:
+    await collectionEvm.methods.changeCollectionOwnerCross(ownerCrossEth).send({from: owner});
+    expect(await collectionEvm.methods.isOwnerOrAdminCross(ownerCrossEth).call()).to.be.true;
+    expect(await helper.collection.getData(collectionId))
+      .to.have.property('normalizedOwner').that.is.eq(helper.address.ethToSubstrate(ownerEth));
+    
+    // Can set Substrate owner:
+    await collectionEvm.methods.changeCollectionOwnerCross(ownerCrossSub).send({from: ownerEth});
+    expect(await collectionEvm.methods.isOwnerOrAdminCross(ownerCrossSub).call()).to.be.true;
+    expect(await helper.collection.getData(collectionId))
+      .to.have.property('normalizedOwner').that.is.eq(helper.address.normalizeSubstrate(ownerSub.address));
   });
 
   itEth.skip('change owner call fee', async ({helper}) => {

--- a/tests/src/eth/createFTCollection.test.ts
+++ b/tests/src/eth/createFTCollection.test.ts
@@ -144,7 +144,7 @@
   
   itEth('destroyCollection', async ({helper}) => {
     const owner = await helper.eth.createAccountWithBalance(donor);
-    const {collectionAddress} = await helper.eth.createFungibleCollection(owner, 'Exister', DECIMALS, 'absolutely anything', 'WIWT');
+    const {collectionAddress, collectionId} = await helper.eth.createFungibleCollection(owner, 'Exister', DECIMALS, 'absolutely anything', 'WIWT');
     const collectionHelper = helper.ethNativeContract.collectionHelpers(owner);
 
     const result = await collectionHelper.methods
@@ -166,6 +166,7 @@
     expect(await collectionHelper.methods
       .isCollectionExist(collectionAddress)
       .call()).to.be.false;
+    expect(await helper.collection.getData(collectionId)).to.be.null;
   });
 });
 
@@ -214,12 +215,15 @@
     }
   });
   
-  itEth('(!negative test!) Create collection (no funds)', async ({helper}) => {
+  itEth('(!negative test!) cannot create collection if value !== 2', async ({helper}) => {
     const owner = await helper.eth.createAccountWithBalance(donor);
     const collectionHelper = helper.ethNativeContract.collectionHelpers(owner);
-    await expect(collectionHelper.methods
-      .createFTCollection('Peasantry', DECIMALS, 'absolutely anything', 'TWIW')
-      .call({value: Number(1n * nominal)})).to.be.rejectedWith('Sent amount not equals to collection creation price (2000000000000000000)');
+    const expects = [0n, 1n, 30n].map(async value => {
+      await expect(collectionHelper.methods
+        .createFTCollection('Peasantry', DECIMALS, 'absolutely anything', 'TWIW')
+        .call({value: Number(value * nominal)})).to.be.rejectedWith('Sent amount not equals to collection creation price (2000000000000000000)');
+    });
+    await Promise.all(expects);
   });
 
   // Soft-deprecated

--- a/tests/src/eth/createNFTCollection.test.ts
+++ b/tests/src/eth/createNFTCollection.test.ts
@@ -308,7 +308,7 @@
 
   itEth('destroyCollection', async ({helper}) => {
     const owner = await helper.eth.createAccountWithBalance(donor);
-    const {collectionAddress} = await helper.eth.createNFTCollection(owner, 'Limits', 'absolutely anything', 'OLF');
+    const {collectionAddress, collectionId} = await helper.eth.createNFTCollection(owner, 'Limits', 'absolutely anything', 'OLF');
     const collectionHelper = helper.ethNativeContract.collectionHelpers(owner);
 
 
@@ -331,5 +331,6 @@
     expect(await collectionHelper.methods
       .isCollectionExist(collectionAddress)
       .call()).to.be.false;
+    expect(await helper.collection.getData(collectionId)).to.be.null;
   });
 });
\ No newline at end of file

--- a/tests/src/eth/createRFTCollection.test.ts
+++ b/tests/src/eth/createRFTCollection.test.ts
@@ -340,7 +340,7 @@
   
   itEth('destroyCollection', async ({helper}) => {
     const owner = await helper.eth.createAccountWithBalance(donor);
-    const {collectionAddress} = await helper.eth.createRFTCollection(owner, 'Limits', 'absolutely anything', 'OLF');
+    const {collectionAddress, collectionId} = await helper.eth.createRFTCollection(owner, 'Limits', 'absolutely anything', 'OLF');
     const collectionHelper = helper.ethNativeContract.collectionHelpers(owner);
     
     await expect(collectionHelper.methods
@@ -349,6 +349,7 @@
     
     expect(await collectionHelper.methods
       .isCollectionExist(collectionAddress)
-      .call()).to.be.false;  
+      .call()).to.be.false;
+    expect(await helper.collection.getData(collectionId)).to.be.null;
   });
 });

--- a/tests/src/eth/destroyCollection.test.ts
+++ b/tests/src/eth/destroyCollection.test.ts
@@ -15,62 +15,48 @@
 // along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
 
 import {IKeyringPair} from '@polkadot/types/types';
-import {Pallets, requirePalletsOrSkip} from '../util';
+import {Pallets} from '../util';
 import {expect, itEth, usingEthPlaygrounds} from './util';
 
-
-describe('Destroy Collection from EVM', () => {
+describe('Destroy Collection from EVM', function() {
   let donor: IKeyringPair;
+  const testCases = [
+    {method: 'createRFTCollection' as const, params: ['Limits', 'absolutely anything', 'OLF'], requiredPallets: [Pallets.ReFungible]},
+    {method: 'createNFTCollection' as const, params: ['Limits', 'absolutely anything', 'OLF'], requiredPallets: [Pallets.NFT]},
+    {method: 'createFTCollection' as const, params: ['Limits', 'absolutely anything', 'OLF', 18], requiredPallets: [Pallets.Fungible]},
+  ];
 
   before(async function() {
-    await usingEthPlaygrounds(async (helper, privateKey) => {
-      requirePalletsOrSkip(this, helper, [Pallets.ReFungible, Pallets.NFT]);
+    await usingEthPlaygrounds(async (_, privateKey) => {
       donor = await privateKey({filename: __filename});
     });
   });
 
-  
-  itEth('(!negative test!) RFT', async ({helper}) => {
-    const owner = await helper.eth.createAccountWithBalance(donor);
-    const signer = await helper.eth.createAccountWithBalance(donor);
-    
-    const unexistedCollection = helper.ethAddress.fromCollectionId(1000000);
-    
-    const {collectionAddress} = await helper.eth.createRFTCollection(owner, 'Limits', 'absolutely anything', 'OLF');
-    const collectionHelper = helper.ethNativeContract.collectionHelpers(signer);
-    
-    await expect(collectionHelper.methods
-      .destroyCollection(collectionAddress)
-      .send({from: signer})).to.be.rejected;
-    
-    await expect(collectionHelper.methods
-      .destroyCollection(unexistedCollection)
-      .send({from: signer})).to.be.rejected;
-    
-    expect(await collectionHelper.methods
-      .isCollectionExist(unexistedCollection)
-      .call()).to.be.false;
-  });
-  
-  itEth('(!negative test!) NFT', async ({helper}) => {
-    const owner = await helper.eth.createAccountWithBalance(donor);
-    const signer = await helper.eth.createAccountWithBalance(donor);
-    
-    const unexistedCollection = helper.ethAddress.fromCollectionId(1000000);
-    
-    const {collectionAddress} = await helper.eth.createNFTCollection(owner, 'Limits', 'absolutely anything', 'OLF');
-    const collectionHelper = helper.ethNativeContract.collectionHelpers(signer);
-    
-    await expect(collectionHelper.methods
-      .destroyCollection(collectionAddress)
-      .send({from: signer})).to.be.rejected;
-    
-    await expect(collectionHelper.methods
-      .destroyCollection(unexistedCollection)
-      .send({from: signer})).to.be.rejected;
-    
-    expect(await collectionHelper.methods
-      .isCollectionExist(unexistedCollection)
-      .call()).to.be.false;
-  });
+  testCases.map((testCase) => 
+    itEth.ifWithPallets(`Cannot burn non-owned or non-existing collection ${testCase.method}`, testCase.requiredPallets, async ({helper}) => {
+      const owner = await helper.eth.createAccountWithBalance(donor);
+      const signer = await helper.eth.createAccountWithBalance(donor);
+      
+      const unexistedCollection = helper.ethAddress.fromCollectionId(1000000);
+      
+      const collectionHelpers = helper.ethNativeContract.collectionHelpers(signer);
+      const {collectionAddress} = await helper.eth.createCollecion(testCase.method, owner, ...testCase.params as [string, string, string, number?]);
+
+      // cannot burn collec
+      await expect(collectionHelpers.methods
+        .destroyCollection(collectionAddress)
+        .send({from: signer})).to.be.rejected;
+      
+      await expect(collectionHelpers.methods
+        .destroyCollection(unexistedCollection)
+        .send({from: signer})).to.be.rejected;
+      
+      expect(await collectionHelpers.methods
+        .isCollectionExist(unexistedCollection)
+        .call()).to.be.false;
+      
+      expect(await collectionHelpers.methods
+        .isCollectionExist(collectionAddress)
+        .call()).to.be.true;
+    }));
 });

--- a/tests/src/eth/fungible.test.ts
+++ b/tests/src/eth/fungible.test.ts
@@ -232,56 +232,64 @@
   });
 
   itEth('Can perform transferCross()', async ({helper}) => {
-    const owner = await helper.eth.createAccountWithBalance(donor);
-    const receiver = await helper.eth.createAccountWithBalance(donor);
-    const to = helper.ethCrossAccount.fromAddress(receiver);
-    const toSubstrate = helper.ethCrossAccount.fromKeyringPair(donor);
+    const sender = await helper.eth.createAccountWithBalance(donor);
+    const receiverEth = await helper.eth.createAccountWithBalance(donor);
+    const receiverCrossEth = helper.ethCrossAccount.fromAddress(receiverEth);
+    const receiverCrossSub = helper.ethCrossAccount.fromKeyringPair(donor);
     const collection = await helper.ft.mintCollection(alice);
-    await collection.mint(alice, 200n, {Ethereum: owner});
+    await collection.mint(alice, 200n, {Ethereum: sender});
 
     const collectionAddress = helper.ethAddress.fromCollectionId(collection.collectionId);
-    const contract = helper.ethNativeContract.collection(collectionAddress, 'ft', owner);
+    const collectionEvm = helper.ethNativeContract.collection(collectionAddress, 'ft', sender);
 
     {
-      const result = await contract.methods.transferCross(to, 50).send({from: owner});
-      
+      // Can transferCross to ethereum address:
+      const result = await collectionEvm.methods.transferCross(receiverCrossEth, 50).send({from: sender});
+      // Check events:
       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.from).to.be.equal(sender);
+      expect(event.returnValues.to).to.be.equal(receiverEth);
       expect(event.returnValues.value).to.be.equal('50');
-    }
-
-    {
-      const balance = await contract.methods.balanceOf(owner).call();
-      expect(+balance).to.equal(150);
-    }
-
-    {
-      const balance = await contract.methods.balanceOf(receiver).call();
-      expect(+balance).to.equal(50);
+      // Sender's balance decreased:
+      const ownerBalance = await collectionEvm.methods.balanceOf(sender).call();
+      expect(+ownerBalance).to.equal(150);
+      // Receiver's balance increased:
+      const receiverBalance = await collectionEvm.methods.balanceOf(receiverEth).call();
+      expect(+receiverBalance).to.equal(50);
     }
     
     {
-      const result = await contract.methods.transferCross(toSubstrate, 50).send({from: owner});
-      
+      // Can transferCross to substrate address:
+      const result = await collectionEvm.methods.transferCross(receiverCrossSub, 50).send({from: sender});
+      // Check events:
       const event = result.events.Transfer;
       expect(event.address).to.be.equal(collectionAddress);
-      expect(event.returnValues.from).to.be.equal(owner);
+      expect(event.returnValues.from).to.be.equal(sender);
       expect(event.returnValues.to).to.be.equal(helper.address.substrateToEth(donor.address));
       expect(event.returnValues.value).to.be.equal('50');
+      // Sender's balance decreased:
+      const senderBalance = await collection.getBalance({Ethereum: sender});
+      expect(senderBalance).to.equal(100n);
+      // Receiver's balance increased:
+      const balance = await collection.getBalance({Substrate: donor.address});
+      expect(balance).to.equal(50n);
     }
+  });
+
+  itEth('Cannot transferCross() more than have', async ({helper}) => {
+    const sender = await helper.eth.createAccountWithBalance(donor);
+    const receiverEth = await helper.eth.createAccountWithBalance(donor);
+    const receiverCrossEth = helper.ethCrossAccount.fromAddress(receiverEth);
+    const BALANCE = 200n;
+    const BALANCE_TO_TRANSFER = BALANCE + 100n;
 
-    {
-      const balance = await collection.getBalance({Ethereum: owner});
-      expect(balance).to.equal(100n);
-    }
+    const collection = await helper.ft.mintCollection(alice);
+    await collection.mint(alice, BALANCE, {Ethereum: sender});
+    const collectionAddress = helper.ethAddress.fromCollectionId(collection.collectionId);
+    const collectionEvm = helper.ethNativeContract.collection(collectionAddress, 'ft', sender);
 
-    {
-      const balance = await collection.getBalance({Substrate: donor.address});
-      expect(balance).to.equal(50n);
-    }
-    
+    await expect(collectionEvm.methods.transferCross(receiverCrossEth, BALANCE_TO_TRANSFER).send({from: sender})).to.be.rejected;
   });
   
   itEth('Can perform transfer()', async ({helper}) => {

--- a/tests/src/eth/nonFungible.test.ts
+++ b/tests/src/eth/nonFungible.test.ts
@@ -251,31 +251,48 @@
 
   itEth('Can perform burnFromCross()', async ({helper}) => {
     const collection = await helper.nft.mintCollection(minter, {name: 'A', description: 'B', tokenPrefix: 'C'});
+    const ownerSub = bob;
+    const ownerCrossSub = helper.ethCrossAccount.fromKeyringPair(ownerSub);
+    const ownerEth = await helper.eth.createAccountWithBalance(donor, 100n);
+    const ownerCrossEth = helper.ethCrossAccount.fromAddress(ownerEth);
 
-    const owner = bob;
-    const spender = await helper.eth.createAccountWithBalance(donor, 100n);
+    const burnerEth = await helper.eth.createAccountWithBalance(donor, 100n);
+    const burnerCrossEth = helper.ethCrossAccount.fromAddress(burnerEth);
 
-    const token = await collection.mintToken(minter, {Substrate: owner.address});
+    const token1 = await collection.mintToken(minter, {Substrate: ownerSub.address});
+    const token2 = await collection.mintToken(minter, {Ethereum: ownerEth});
+
+    const collectionAddress = helper.ethAddress.fromCollectionId(collection.collectionId);
+    const collectionEvm = helper.ethNativeContract.collection(collectionAddress, 'nft');
 
-    const address = helper.ethAddress.fromCollectionId(collection.collectionId);
-    const contract = helper.ethNativeContract.collection(address, 'nft');
+    // Approve tokens from substrate and ethereum:
+    await token1.approve(ownerSub, {Ethereum: burnerEth});
+    await collectionEvm.methods.approveCross(burnerCrossEth, token2.tokenId).send({from: ownerEth});
 
-    {
-      await token.approve(owner, {Ethereum: spender});
-      const ownerCross = helper.ethCrossAccount.fromKeyringPair(owner);
-      const result = await contract.methods.burnFromCross(ownerCross, token.tokenId).send({from: spender});
-      const events = result.events.Transfer;
+    // can burnFromCross:
+    const result1 = await collectionEvm.methods.burnFromCross(ownerCrossSub, token1.tokenId).send({from: burnerEth});
+    const result2 = await collectionEvm.methods.burnFromCross(ownerCrossEth, token2.tokenId).send({from: burnerEth});
+    const events1 = result1.events.Transfer;
+    const events2 = result2.events.Transfer;
 
-      expect(events).to.be.like({
-        address,
+    // Check events for burnFromCross (substrate and ethereum):
+    [
+      [events1, token1, helper.address.substrateToEth(ownerSub.address)], 
+      [events2, token2, ownerEth],
+    ].map(burnData => {
+      expect(burnData[0]).to.be.like({
+        address: collectionAddress,
         event: 'Transfer',
         returnValues: {
-          from: helper.address.substrateToEth(owner.address),
+          from: burnData[2],
           to: '0x0000000000000000000000000000000000000000',
-          tokenId: token.tokenId.toString(),
+          tokenId: burnData[1].tokenId.toString(),
         },
       });
-    }
+    });
+
+    expect(await token1.doesExist()).to.be.false;
+    expect(await token2.doesExist()).to.be.false;
   });
 
   itEth('Can perform approveCross()', async ({helper}) => {
@@ -326,6 +343,34 @@
     expect(await helper.nft.getTokenOwner(collection.collectionId, token2.tokenId)).to.deep.eq({Ethereum: receiverEth.toLowerCase()});
   });
 
+  itEth('Can reaffirm approved address', async ({helper}) => {
+    const owner = await helper.eth.createAccountWithBalance(donor, 100n);
+    const ownerCrossEth = helper.ethCrossAccount.fromAddress(owner);
+    const [receiver1, receiver2] = await helper.arrange.createAccounts([100n, 100n], donor);
+    const receiver1Cross = helper.ethCrossAccount.fromKeyringPair(receiver1);
+    const receiver2Cross = helper.ethCrossAccount.fromKeyringPair(receiver2);
+    const collection = await helper.nft.mintCollection(minter, {name: 'A', description: 'B', tokenPrefix: 'C'});
+    const token1 = await collection.mintToken(minter, {Ethereum: owner});
+    const token2 = await collection.mintToken(minter, {Ethereum: owner});
+    const collectionEvm = helper.ethNativeContract.collection(helper.ethAddress.fromCollectionId(collection.collectionId), 'nft');
+
+    // Can approve and reaffirm approved address:
+    await collectionEvm.methods.approveCross(receiver1Cross, token1.tokenId).send({from: owner});
+    await collectionEvm.methods.approveCross(receiver2Cross, token1.tokenId).send({from: owner});
+
+    // receiver1 cannot transferFrom:
+    await expect(helper.nft.transferTokenFrom(receiver1, collection.collectionId, token1.tokenId, {Ethereum: owner}, {Substrate: receiver1.address})).to.be.rejected;
+    // receiver2 can transferFrom:
+    await helper.nft.transferTokenFrom(receiver2, collection.collectionId, token1.tokenId, {Ethereum: owner}, {Substrate: receiver2.address});
+
+    // can set approved address to self address to remove approval:
+    await collectionEvm.methods.approveCross(receiver1Cross, token2.tokenId).send({from: owner});
+    await collectionEvm.methods.approveCross(ownerCrossEth, token2.tokenId).send({from: owner});
+
+    // receiver1 cannot transfer token anymore:
+    await expect(helper.nft.transferTokenFrom(receiver1, collection.collectionId, token2.tokenId, {Ethereum: owner}, {Substrate: receiver1.address})).to.be.rejected;
+  });
+
   itEth('Can perform transferFrom()', async ({helper}) => {
     const owner = await helper.eth.createAccountWithBalance(donor);
     const spender = await helper.eth.createAccountWithBalance(donor);
@@ -426,54 +471,50 @@
   itEth('Can perform transferCross()', async ({helper}) => {
     const collection = await helper.nft.mintCollection(minter, {});
     const owner = await helper.eth.createAccountWithBalance(donor);
-    const receiver = await helper.eth.createAccountWithBalance(donor);
-    const to = helper.ethCrossAccount.fromAddress(receiver);
-    const toSubstrate = helper.ethCrossAccount.fromKeyringPair(minter);
+    const receiverEth = await helper.eth.createAccountWithBalance(donor);
+    const receiverCrossEth = helper.ethCrossAccount.fromAddress(receiverEth);
+    const receiverCrossSub = helper.ethCrossAccount.fromKeyringPair(minter);
     
     const {tokenId} = await collection.mintToken(minter, {Ethereum: owner});
 
     const collectionAddress = helper.ethAddress.fromCollectionId(collection.collectionId);
-    const contract = helper.ethNativeContract.collection(collectionAddress, 'nft', owner);
+    const collectionEvm = helper.ethNativeContract.collection(collectionAddress, 'nft', owner);
 
     {
-      const result = await contract.methods.transferCross(to, tokenId).send({from: owner});
-
+      // Can transferCross to ethereum address:
+      const result = await collectionEvm.methods.transferCross(receiverCrossEth, tokenId).send({from: owner});
+      // Check events:
       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.to).to.be.equal(receiverEth);
       expect(event.returnValues.tokenId).to.be.equal(`${tokenId}`);
-    }
-
-    {
-      const balance = await contract.methods.balanceOf(owner).call();
-      expect(+balance).to.equal(0);
+      
+      // owner has balance = 0:
+      const ownerBalance = await collectionEvm.methods.balanceOf(owner).call();
+      expect(+ownerBalance).to.equal(0);
+      // receiver owns token:
+      const receiverBalance = await collectionEvm.methods.balanceOf(receiverEth).call();
+      expect(+receiverBalance).to.equal(1);
+      expect(await helper.nft.getTokenOwner(collection.collectionId, tokenId)).to.deep.eq({Ethereum: receiverEth.toLowerCase()});
     }
-
-    {
-      const balance = await contract.methods.balanceOf(receiver).call();
-      expect(+balance).to.equal(1);
-    }
     
     {
-      const substrateResult = await contract.methods.transferCross(toSubstrate, tokenId).send({from: receiver});
-      
-
+      // Can transferCross to substrate address:
+      const substrateResult = await collectionEvm.methods.transferCross(receiverCrossSub, tokenId).send({from: receiverEth});
+      // Check events:
       const event = substrateResult.events.Transfer;
       expect(event.address).to.be.equal(collectionAddress);
-      expect(event.returnValues.from).to.be.equal(receiver);
+      expect(event.returnValues.from).to.be.equal(receiverEth);
       expect(event.returnValues.to).to.be.equal(helper.address.substrateToEth(minter.address));
       expect(event.returnValues.tokenId).to.be.equal(`${tokenId}`);
-    }
-
-    {
-      const balance = await contract.methods.balanceOf(receiver).call();
-      expect(+balance).to.equal(0);
-    }
-
-    {
-      const balance = await helper.nft.getTokensByAddress(collection.collectionId, {Substrate: minter.address});
-      expect(balance).to.be.contain(tokenId);
+      
+      // owner has balance = 0:
+      const ownerBalance = await collectionEvm.methods.balanceOf(receiverEth).call();
+      expect(+ownerBalance).to.equal(0);
+      // receiver owns token:
+      const receiverBalance = await helper.nft.getTokensByAddress(collection.collectionId, {Substrate: minter.address});
+      expect(receiverBalance).to.contain(tokenId);
     }
   });
 });