git.delta.rocks / unique-network / refs/commits / aabcd75cbcbe

--- a/tests/src/connection.test.ts
+++ b/tests/src/connection.test.ts
@@ -21,6 +21,8 @@
   });
 
   it('Cannot connect to 255.255.255.255', async () => {
+    const log = console.log;
+    const error = console.error;
     console.log = function () {};
     console.error = function () {};
 
@@ -31,7 +33,7 @@
       }, { provider: neverConnectProvider });
     })()).to.be.eventually.rejected;
 
-    delete console.log;
-    delete console.error;
+    console.log = log;
+    console.error = error;
   });
 });
\ No newline at end of file

--- a/tests/src/contracts.test.ts
+++ b/tests/src/contracts.test.ts
@@ -111,9 +111,6 @@
       const bob = privateKey("//Bob");
 
       const [contract, deployer] = await deployFlipper(api);
-      const consoleError = console.error;
-      console.error = (...data: any[]) => {
-      };
 
       let expectedFlipValue = await getFlipValue(contract, deployer);
 
@@ -168,7 +165,6 @@
       const afterWhiteListDisabled = await getFlipValue(contract,deployer);
       expect(afterWhiteListDisabled).to.be.eq(expectedFlipValue, `Anyone can call contract with disabled whitelist.`);
 
-      console.error = consoleError;
     });
   });
 

--- a/tests/src/createCollection.test.ts
+++ b/tests/src/createCollection.test.ts
@@ -6,37 +6,29 @@
 import chai from 'chai';
 import chaiAsPromised from 'chai-as-promised';
 import { default as usingApi } from "./substrate/substrate-api";
-import { createCollectionExpectSuccess, createCollectionExpectFailure } from "./util/helpers";
+import { createCollectionExpectSuccess, createCollectionExpectFailure, CollectionMode } from "./util/helpers";
 
 chai.use(chaiAsPromised);
 const expect = chai.expect;
 
 describe('integration test: ext. createCollection():', () => {
   it('Create new NFT collection', async () => {
-    await createCollectionExpectSuccess('A', 'B', 'C', 'NFT');
+    await createCollectionExpectSuccess({name: 'A', description: 'B', tokenPrefix: 'C', mode: 'NFT'});
   });
   it('Create new NFT collection whith collection_name of maximum length (64 bytes)', async () => {
-    await createCollectionExpectSuccess(
-      'ABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCD',
-      '1', '1', 'NFT');
+    await createCollectionExpectSuccess({name: 'A'.repeat(64)});
   });
   it('Create new NFT collection whith collection_description of maximum length (256 bytes)', async () => {
-    await createCollectionExpectSuccess(
-      'A', 
-      'ABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJabcdef',
-      '1', 'NFT');
+    await createCollectionExpectSuccess({description: 'A'.repeat(256)});
   });
   it('Create new NFT collection whith token_prefix of maximum length (16 bytes)', async () => {
-    await createCollectionExpectSuccess(
-      '1', 
-      '1',
-      'ABCDEFGHIJABCDEF', 'NFT');
+    await createCollectionExpectSuccess({tokenPrefix: 'A'.repeat(16)});
   });
   it('Create new Fungible collection', async () => {
-    await createCollectionExpectSuccess('1', '1', '1', 'Fungible');
+    await createCollectionExpectSuccess({mode: 'Fungible'});
   });
   it('Create new ReFungible collection', async () => {
-    await createCollectionExpectSuccess('1', '1', '1', 'ReFungible');
+    await createCollectionExpectSuccess({mode: 'ReFungible'});
   });
 });
 
@@ -46,7 +38,7 @@
       const AcollectionCount = parseInt((await api.query.nft.collectionCount()).toString());
 
       const badTransaction = async function () { 
-        await createCollectionExpectSuccess('1', '1', '1', 'BadMode');
+        await createCollectionExpectSuccess({mode: 'BadMode' as CollectionMode});
       };
       expect(badTransaction()).to.be.rejected;
 
@@ -55,18 +47,12 @@
     });
   });
   it('(!negative test!) create new NFT collection whith incorrect data (collection_name)', async () => {
-    await createCollectionExpectFailure(
-      'ABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDE', 
-      '1', '1', 'NFT');
+    await createCollectionExpectFailure({name: 'A'.repeat(65)});
   });
   it('(!negative test!) create new NFT collection whith incorrect data (collection_description)', async () => {
-    await createCollectionExpectFailure('1',
-      'ABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJABCDEFGHIJabcdefg',
-      '1', 'NFT');
+    await createCollectionExpectFailure({description: 'A'.repeat(257)});
   });
   it('(!negative test!) create new NFT collection whith incorrect data (token_prefix)', async () => {
-    await createCollectionExpectFailure('1', '1', 
-    'ABCDEFGHIJABCDEFG',
-    'NFT');
+    await createCollectionExpectFailure({tokenPrefix: 'A'.repeat(17)});
   });
 });

--- a/tests/src/createItem.test.ts
+++ b/tests/src/createItem.test.ts
@@ -18,17 +18,17 @@
 
   it('Create new item in NFT collection', async () => {
     const createMode = 'NFT';
-    const newCollectionID = await createCollectionExpectSuccess('0', '0', '0', createMode);
+    const newCollectionID = await createCollectionExpectSuccess({mode: createMode});
     await createItemExpectSuccess(alice, newCollectionID, createMode);
   });
   it('Create new item in Fungible collection', async () => {
     const createMode = 'Fungible';
-    const newCollectionID = await createCollectionExpectSuccess('0', '0', '0', createMode);
+    const newCollectionID = await createCollectionExpectSuccess({mode: createMode});
     await createItemExpectSuccess(alice, newCollectionID, createMode);
   });
   it('Create new item in ReFungible collection', async () => {
     const createMode = 'ReFungible';
-    const newCollectionID = await createCollectionExpectSuccess('0', '0', '0', createMode);
+    const newCollectionID = await createCollectionExpectSuccess({mode: createMode});
     await createItemExpectSuccess(alice, newCollectionID, createMode);
   });
 });

--- a/tests/src/creditFeesToTreasury.test.ts
+++ b/tests/src/creditFeesToTreasury.test.ts
@@ -5,7 +5,7 @@
 
 import chai from 'chai';
 import chaiAsPromised from 'chai-as-promised';
-import { default as usingApi, submitTransactionAsync } from "./substrate/substrate-api";
+import { default as usingApi, submitTransactionAsync, submitTransactionExpectFailAsync } from "./substrate/substrate-api";
 import { alicesPublicKey, bobsPublicKey } from "./accounts";
 import privateKey from "./substrate/privateKey";
 import { BigNumber } from 'bignumber.js';
@@ -63,14 +63,13 @@
       const bobBalanceBefore = new BigNumber((await api.query.system.account(bobsPublicKey)).data.free.toString());
 
       const badTx = api.tx.balances.setBalance(alicesPublicKey, 0, 0);
-      const result = getGenericResult(await submitTransactionAsync(bobPrivateKey, badTx));
+      await expect(submitTransactionExpectFailAsync(bobPrivateKey, badTx)).to.be.rejected;
 
       const treasuryBalanceAfter = new BigNumber((await api.query.system.account(Treasury)).data.free.toString());
       const bobBalanceAfter = new BigNumber((await api.query.system.account(bobsPublicKey)).data.free.toString());
       const fee = bobBalanceBefore.minus(bobBalanceAfter);
       const treasuryIncrease = treasuryBalanceAfter.minus(treasuryBalanceBefore);
 
-      expect(result.success).to.be.false;
       expect(treasuryIncrease.toFixed()).to.be.equal(fee.toFixed());
     });
   });
@@ -80,7 +79,7 @@
       const treasuryBalanceBefore = new BigNumber((await api.query.system.account(Treasury)).data.free.toString());
       const aliceBalanceBefore = new BigNumber((await api.query.system.account(alicesPublicKey)).data.free.toString());
 
-      await createCollectionExpectSuccess('A', 'B', 'C', 'NFT');
+      await createCollectionExpectSuccess();
 
       const treasuryBalanceAfter = new BigNumber((await api.query.system.account(Treasury)).data.free.toString());
       const aliceBalanceAfter = new BigNumber((await api.query.system.account(alicesPublicKey)).data.free.toString());
@@ -96,7 +95,7 @@
       const treasuryBalanceBefore = new BigNumber((await api.query.system.account(Treasury)).data.free.toString());
       const aliceBalanceBefore = new BigNumber((await api.query.system.account(alicesPublicKey)).data.free.toString());
 
-      await createCollectionExpectSuccess('A', 'B', 'C', 'NFT');
+      await createCollectionExpectSuccess();
 
       const treasuryBalanceAfter = new BigNumber((await api.query.system.account(Treasury)).data.free.toString());
       const aliceBalanceAfter = new BigNumber((await api.query.system.account(alicesPublicKey)).data.free.toString());

--- a/tests/src/destroyCollection.test.ts
+++ b/tests/src/destroyCollection.test.ts
@@ -10,15 +10,15 @@
 
 describe('integration test: ext. destroyCollection():', () => {
   it('NFT collection can be destroyed', async () => {
-    const collectionId = await createCollectionExpectSuccess('A', 'B', 'C', 'NFT');
+    const collectionId = await createCollectionExpectSuccess();
     await destroyCollectionExpectSuccess(collectionId);
   });
   it('Fungible collection can be destroyed', async () => {
-    const collectionId = await createCollectionExpectSuccess('A', 'B', 'C', 'Fungible');
+    const collectionId = await createCollectionExpectSuccess({ mode: 'Fungible' });
     await destroyCollectionExpectSuccess(collectionId);
   });
   it('ReFungible collection can be destroyed', async () => {
-    const collectionId = await createCollectionExpectSuccess('A', 'B', 'C', 'ReFungible');
+    const collectionId = await createCollectionExpectSuccess({ mode: 'ReFungible' });
     await destroyCollectionExpectSuccess(collectionId);
   });
 });
@@ -32,12 +32,12 @@
     });
   });
   it('(!negative test!) Destroy a collection that has already been destroyed', async () => {
-    const collectionId = await createCollectionExpectSuccess('A', 'B', 'C', 'NFT');
+    const collectionId = await createCollectionExpectSuccess();
     await destroyCollectionExpectSuccess(collectionId);
     await destroyCollectionExpectFailure(collectionId);
   });
   it('(!negative test!) Destroy a collection using non-owner account', async () => {
-    const collectionId = await createCollectionExpectSuccess('A', 'B', 'C', 'NFT');
+    const collectionId = await createCollectionExpectSuccess();
     await destroyCollectionExpectFailure(collectionId, '//Bob');
     await destroyCollectionExpectSuccess(collectionId, '//Alice');
   });

--- a/tests/src/removeCollectionSponsor.test.ts
+++ b/tests/src/removeCollectionSponsor.test.ts
@@ -5,7 +5,7 @@
 
 import chai from 'chai';
 import chaiAsPromised from 'chai-as-promised';
-import { default as usingApi, submitTransactionAsync } from "./substrate/substrate-api";
+import { default as usingApi, submitTransactionAsync, submitTransactionExpectFailAsync } from "./substrate/substrate-api";
 import { 
   createCollectionExpectSuccess, 
   setCollectionSponsorExpectSuccess, 
@@ -46,7 +46,7 @@
   });
 
   it('Remove NFT collection sponsor stops sponsorship', async () => {
-    const collectionId = await createCollectionExpectSuccess('A', 'B', 'C', 'NFT');
+    const collectionId = await createCollectionExpectSuccess();
     await setCollectionSponsorExpectSuccess(collectionId, bob.address);
     await confirmSponsorshipExpectSuccess(collectionId, '//Bob');
     await removeCollectionSponsorExpectSuccess(collectionId);
@@ -62,11 +62,7 @@
       const AsponsorBalance = new BigNumber((await api.query.system.account(bob.address)).data.free.toString());
       const zeroToAlice = api.tx.nft.transfer(alice.address, collectionId, itemId, 0);
       const badTransaction = async function () { 
-        console.log = function () {};
-        console.error = function () {};
-        await submitTransactionAsync(zeroBalance, zeroToAlice);
-        delete console.log;
-        delete console.error;
+        await submitTransactionExpectFailAsync(zeroBalance, zeroToAlice);
       };
       await expect(badTransaction()).to.be.rejectedWith("Inability to pay some fees");
       const BsponsorBalance = new BigNumber((await api.query.system.account(bob.address)).data.free.toString());
@@ -76,7 +72,7 @@
   });
 
   it('Remove a sponsor after it was already removed', async () => {
-    const collectionId = await createCollectionExpectSuccess('A', 'B', 'C', 'NFT');
+    const collectionId = await createCollectionExpectSuccess();
     await setCollectionSponsorExpectSuccess(collectionId, bob.address);
     await confirmSponsorshipExpectSuccess(collectionId, '//Bob');
     await removeCollectionSponsorExpectSuccess(collectionId);
@@ -84,12 +80,12 @@
   });
 
   it('Remove sponsor in a collection that never had the sponsor set', async () => {
-    const collectionId = await createCollectionExpectSuccess('A', 'B', 'C', 'NFT');
+    const collectionId = await createCollectionExpectSuccess();
     await removeCollectionSponsorExpectSuccess(collectionId);
   });
 
   it('Remove sponsor for a collection that had the sponsor set, but not confirmed', async () => {
-    const collectionId = await createCollectionExpectSuccess('A', 'B', 'C', 'NFT');
+    const collectionId = await createCollectionExpectSuccess();
     await setCollectionSponsorExpectSuccess(collectionId, bob.address);
     await removeCollectionSponsorExpectSuccess(collectionId);
   });
@@ -117,21 +113,21 @@
   });
 
   it('(!negative test!) Remove sponsor in a destroyed collection', async () => {
-    const collectionId = await createCollectionExpectSuccess('A', 'B', 'C', 'NFT');
+    const collectionId = await createCollectionExpectSuccess();
     await setCollectionSponsorExpectSuccess(collectionId, bob.address);
     await destroyCollectionExpectSuccess(collectionId);
     await removeCollectionSponsorExpectFailure(collectionId);
   });
 
   it('Set - remove - confirm: fails', async () => {
-    const collectionId = await createCollectionExpectSuccess('A', 'B', 'C', 'NFT');
+    const collectionId = await createCollectionExpectSuccess();
     await setCollectionSponsorExpectSuccess(collectionId, bob.address);
     await removeCollectionSponsorExpectSuccess(collectionId);
     await confirmSponsorshipExpectFailure(collectionId, '//Bob');
   });
 
   it('Set - confirm - remove - confirm: Sponsor cannot come back', async () => {
-    const collectionId = await createCollectionExpectSuccess('A', 'B', 'C', 'NFT');
+    const collectionId = await createCollectionExpectSuccess();
     await setCollectionSponsorExpectSuccess(collectionId, bob.address);
     await confirmSponsorshipExpectSuccess(collectionId, '//Bob');
     await removeCollectionSponsorExpectSuccess(collectionId);

--- a/tests/src/setCollectionSponsor.test.ts
+++ b/tests/src/setCollectionSponsor.test.ts
@@ -26,25 +26,25 @@
   });
 
   it('Set NFT collection sponsor', async () => {
-    const collectionId = await createCollectionExpectSuccess('A', 'B', 'C', 'NFT');
+    const collectionId = await createCollectionExpectSuccess();
     await setCollectionSponsorExpectSuccess(collectionId, bob.address);
   });
   it('Set Fungible collection sponsor', async () => {
-    const collectionId = await createCollectionExpectSuccess('A', 'B', 'C', 'Fungible');
+    const collectionId = await createCollectionExpectSuccess({ mode: 'Fungible' });
     await setCollectionSponsorExpectSuccess(collectionId, bob.address);
   });
   it('Set ReFungible collection sponsor', async () => {
-    const collectionId = await createCollectionExpectSuccess('A', 'B', 'C', 'ReFungible');
+    const collectionId = await createCollectionExpectSuccess({ mode: 'ReFungible' });
     await setCollectionSponsorExpectSuccess(collectionId, bob.address);
   });
 
   it('Set the same sponsor repeatedly', async () => {
-    const collectionId = await createCollectionExpectSuccess('A', 'B', 'C', 'NFT');
+    const collectionId = await createCollectionExpectSuccess();
     await setCollectionSponsorExpectSuccess(collectionId, bob.address);
     await setCollectionSponsorExpectSuccess(collectionId, bob.address);
   });
   it('Replace collection sponsor', async () => {
-    const collectionId = await createCollectionExpectSuccess('A', 'B', 'C', 'NFT');
+    const collectionId = await createCollectionExpectSuccess();
 
     const keyring = new Keyring({ type: 'sr25519' });
     const charlie = keyring.addFromUri(`//Charlie`);
@@ -62,7 +62,7 @@
   });
 
   it('(!negative test!) Add sponsor with a non-owner', async () => {
-    const collectionId = await createCollectionExpectSuccess('A', 'B', 'C', 'NFT');
+    const collectionId = await createCollectionExpectSuccess();
     await setCollectionSponsorExpectFailure(collectionId, bob.address, '//Bob');
   });
   it('(!negative test!) Add sponsor to a collection that never existed', async () => {
@@ -75,7 +75,7 @@
     await setCollectionSponsorExpectFailure(collectionId, bob.address);
   });
   it('(!negative test!) Add sponsor to a collection that was destroyed', async () => {
-    const collectionId = await createCollectionExpectSuccess('A', 'B', 'C', 'NFT');
+    const collectionId = await createCollectionExpectSuccess();
     await destroyCollectionExpectSuccess(collectionId);
     await setCollectionSponsorExpectFailure(collectionId, bob.address);
   });

--- a/tests/src/substrate/substrate-api.ts
+++ b/tests/src/substrate/substrate-api.ts
@@ -33,21 +33,42 @@
   }
 }
 
+enum TransactionStatus {
+  Success,
+  Fail,
+  NotReady
+}
+
+function getTransactionStatus(events: EventRecord[], status: ExtrinsicStatus): TransactionStatus {
+  if (status.isReady) {
+    return TransactionStatus.NotReady;
+  }
+  if (status.isBroadcast) {
+    return TransactionStatus.NotReady;
+  } 
+  if (status.isInBlock || status.isFinalized) {
+    if(events.filter(e => e.event.data.method === 'ExtrinsicFailed').length > 0) {
+      return TransactionStatus.Fail;
+    }
+    if(events.filter(e => e.event.data.method === 'ExtrinsicSuccess').length > 0) {
+      return TransactionStatus.Success;
+    }
+  }
+
+  return TransactionStatus.Fail;
+}
+
 export function submitTransactionAsync(sender: IKeyringPair, transaction: SubmittableExtrinsic<ApiTypes>): Promise<EventRecord[]> {
   return new Promise(async function(resolve, reject) {
     try {
       await transaction.signAndSend(sender, ({ events = [], status }) => {
-        if (status.isReady) {
-          // nothing to do
-          // console.log(`Current tx status is Ready`);
-        } else if (status.isBroadcast) {
-          // nothing to do
-          // console.log(`Current tx status is Broadcast`);
-        } else if (status.isInBlock || status.isFinalized) {
+        const transactionStatus = getTransactionStatus(events, status);
+
+        if (transactionStatus == TransactionStatus.Success) {
           resolve(events);
-        } else {
+        } else if (transactionStatus == TransactionStatus.Fail) {
           console.log(`Something went wrong with transaction. Status: ${status}`);
-          reject("Transaction failed");
+          reject(events);
         }
       });
     } catch (e) {
@@ -58,19 +79,35 @@
 }
 
 export function submitTransactionExpectFailAsync(sender: IKeyringPair, transaction: SubmittableExtrinsic<ApiTypes>): Promise<EventRecord[]> {
-  return new Promise(async function(resolve, reject) {
+  const consoleError = console.error;
+  const consoleLog = console.log;
+  console.error = () => {};
+  console.log = () => {};
+
+  return new Promise<EventRecord[]>(async function(res, rej) {
+    const resolve = (rec: EventRecord[]) => {
+      setTimeout(() => {
+        res(rec);
+        console.error = consoleError;
+        console.log = consoleLog;
+        
+      });
+    };
+    const reject = (errror: any) => {
+      setTimeout(() => {
+        rej(errror);
+        console.error = consoleError;
+        console.log = consoleLog;
+      });
+    };
     try {
       await transaction.signAndSend(sender, ({ events = [], status }) => {
-        if (status.isReady) {
-          // nothing to do
-          // console.log(`Current tx status is Ready`);
-        } else if (status.isBroadcast) {
-          // nothing to do
-          // console.log(`Current tx status is Broadcast`);
-        } else if (status.isInBlock || status.isFinalized) {
+        const transactionStatus = getTransactionStatus(events, status);
+
+        if (transactionStatus == TransactionStatus.Success) {
           resolve(events);
-        } else {
-          reject("Transaction failed");
+        } else if (transactionStatus == TransactionStatus.Fail) {
+          reject(events);
         }
       });
     } catch (e) {

--- a/tests/src/transfer.test.ts
+++ b/tests/src/transfer.test.ts
@@ -33,6 +33,8 @@
       // Find unused address
       const pk = await findUnusedAddress(api);
 
+      const error = console.error;
+      const log = console.log;
       console.log = function () {};
       console.error = function () {};
   
@@ -42,8 +44,8 @@
       };
       await expect(badTransaction()).to.be.rejectedWith("Inability to pay some fees");
 
-      delete console.log;
-      delete console.error;
+      console.log = log;
+      console.error = error;
     });
   });
 });

--- a/tests/src/util/helpers.ts
+++ b/tests/src/util/helpers.ts
@@ -7,7 +7,7 @@
 import chaiAsPromised from 'chai-as-promised';
 import type { AccountId, EventRecord } from '@polkadot/types/interfaces';
 import { ApiPromise, Keyring } from "@polkadot/api";
-import { default as usingApi, submitTransactionAsync } from "../substrate/substrate-api";
+import { default as usingApi, submitTransactionAsync, submitTransactionExpectFailAsync } from "../substrate/substrate-api";
 import privateKey from '../substrate/privateKey';
 import { alicesPublicKey, nullPublicKey } from "../accounts";
 import { strToUTF16, utf16ToStr, hexToStr } from '../util/util';
@@ -86,7 +86,24 @@
   return result;
 }
 
-export async function createCollectionExpectSuccess(name: string, description: string, tokenPrefix: string, mode: string): Promise<number> {
+export type CollectionMode = 'NFT' | 'Fungible' | 'ReFungible';
+export type CreateCollectionParams = {
+  mode: CollectionMode,
+  name: string,
+  description: string,
+  tokenPrefix: string
+};
+
+const defaultCreateCollectionParams: CreateCollectionParams = {
+  name: 'name',
+  description: 'description',
+  mode: 'NFT',
+  tokenPrefix: 'prefix'
+}
+
+export async function createCollectionExpectSuccess(params: Partial<CreateCollectionParams> = {}): Promise<number> {
+  const {name, description, mode, tokenPrefix } = {...defaultCreateCollectionParams, ...params};
+
   let collectionId: number = 0;
   await usingApi(async (api) => {
     // Get number of collections before the transaction
@@ -120,15 +137,17 @@
   return collectionId;
 }
   
-export async function createCollectionExpectFailure(name: string, description: string, tokenPrefix: string, mode: string) {
+export async function createCollectionExpectFailure(params: Partial<CreateCollectionParams> = {}) {
+  const {name, description, mode, tokenPrefix } = {...defaultCreateCollectionParams, ...params};
+
   await usingApi(async (api) => {
     // Get number of collections before the transaction
     const AcollectionCount = parseInt((await api.query.nft.createdCollectionCount()).toString());
 
     // Run the CreateCollection transaction
     const alicePrivateKey = privateKey('//Alice');
-    const tx = api.tx.nft.createCollection(name, description, tokenPrefix, mode);
-    const events = await submitTransactionAsync(alicePrivateKey, tx);
+    const tx = api.tx.nft.createCollection(strToUTF16(name), strToUTF16(description), strToUTF16(tokenPrefix), mode);
+    const events = await expect(submitTransactionExpectFailAsync(alicePrivateKey, tx)).to.be.rejected;
     const result = getCreateCollectionResult(events);
 
     // Get number of collections after the transaction
@@ -168,11 +187,7 @@
     // Run the DestroyCollection transaction
     const alicePrivateKey = privateKey(senderSeed);
     const tx = api.tx.nft.destroyCollection(collectionId);
-    const events = await submitTransactionAsync(alicePrivateKey, tx);
-    const result = getDestroyResult(events);
-
-    // What to expect
-    expect(result).to.be.false;
+    await expect(submitTransactionExpectFailAsync(alicePrivateKey, tx)).to.be.rejected;
   });
 }
 
@@ -238,11 +253,7 @@
     // Run the transaction
     const alicePrivateKey = privateKey('//Alice');
     const tx = api.tx.nft.removeCollectionSponsor(collectionId);
-    const events = await submitTransactionAsync(alicePrivateKey, tx);
-    const result = getGenericResult(events);
-
-    // What to expect
-    expect(result.success).to.be.false;
+    await expect(submitTransactionExpectFailAsync(alicePrivateKey, tx)).to.be.rejected;
   });
 }
 
@@ -252,11 +263,7 @@
     // Run the transaction
     const alicePrivateKey = privateKey(senderSeed);
     const tx = api.tx.nft.setCollectionSponsor(collectionId, sponsor);
-    const events = await submitTransactionAsync(alicePrivateKey, tx);
-    const result = getGenericResult(events);
-
-    // What to expect
-    expect(result.success).to.be.false;
+    await expect(submitTransactionExpectFailAsync(alicePrivateKey, tx)).to.be.rejected;
   });
 }
 
@@ -285,11 +292,7 @@
     // Run the transaction
     const sender = privateKey(senderSeed);
     const tx = api.tx.nft.confirmSponsorship(collectionId);
-    const events = await submitTransactionAsync(sender, tx);
-    const result = getGenericResult(events);
-
-    // What to expect
-    expect(result.success).to.be.false;
+    await expect(submitTransactionExpectFailAsync(sender, tx)).to.be.rejected;
   });
 }