Update balancesOf method in MRC20 contract to accept final parameter …

…and adjust related tests

src/contracts-wrappers/token.ts

@@ -1,4 +1,4 @@
-import { Args, bytesToStr, strToBytes, U256, U8 } from '../basicElements'
+import { Args, bytesToStr, U256, U8 } from '../basicElements'
 import { Operation } from '../operation'
 import { CallSCOptions, ReadSCOptions, SmartContract } from '../smartContracts'
 
@@ -85,16 +85,19 @@ export class MRC20 extends SmartContract {
     return U256.fromBytes(res.value)
   }
 
-  async balancesOf(addresses: string[]): Promise<
+  async balancesOf(
+    addresses: string[],
+    final = true
+  ): Promise<
     {
       address: string
       balance: bigint
     }[]
   > {
     const res = await this.provider.readStorage(
       this.address,
-      addresses.map((a) => strToBytes(`BALANCE${a}`)),
-      true
+      addresses.map((a) => `BALANCE${a}`),
+      final
     )
 
     return res.map((v, i) => ({

test/integration/MRC20.spec.ts

@@ -1,4 +1,4 @@
-import { account, Account } from '../../src'
+import { Account } from '../../src'
 import { MRC20 } from '../../src/contracts-wrappers'
 import { provider } from './setup'
 
@@ -94,18 +94,18 @@ describe('Generic token wrapper tests', () => {
       expect(balance).toBe(0n)
     }
 
-    const operation = await usdcContract.transfer(
-      recipientAddresses[0],
-      amounts[0]
-    )
+    await usdcContract.transfer(recipientAddresses[0], amounts[0])
 
     const operation2 = await usdcContract.transfer(
       recipientAddresses[1],
       amounts[1]
     )
-    await operation2.waitFinalExecution()
+    await operation2.waitSpeculativeExecution()
 
-    const recipientBalance = await usdcContract.balancesOf(recipientAddresses)
+    const recipientBalance = await usdcContract.balancesOf(
+      recipientAddresses,
+      false
+    )
 
     expect(recipientBalance[0].balance).toBe(amounts[0])
     expect(recipientBalance[0].address).toBe(recipientAddresses[0])