ERC20 transaction not throwing error but balance is not registering

Question

//abi not included here, provider is alchemy

const wallet = new ethers.Wallet(PRIVATE_KEY,provider);
tokenB = new ethers.Contract(
USDTaddress,
usdtabi,
    wallet
);
 await tokenB.transfer(account2.address,ethers.BigNumber.from(100),{gasLimit: 250000, gasPrice: ethers.utils.parseUnits('100', 'gwei')});

    let balanceUSDT = await tokenB.balanceOf(account2.address);
console.log(`Current account2 USDT balance:${balanceUSDT.toString()}`);
    

This code throws no errors but the USDT balance shows 0. This is on a hardhat local net with the contract instantiated already. Other functions including totalsupply work well. Thanks

Answer 1

When you call the transfer function, the transaction is still pending to be mined by a miner, and hence until then, you will not see your balance increase. To fix this you can wait until the transaction is mined.

const tx = await tokenB.transfer(account2.address,ethers.BigNumber.from(100),{gasLimit: 250000, gasPrice: ethers.utils.parseUnits('100', 'gwei')});

await tx.wait(); // wait for tx to be mined

let balanceUSDT = await tokenB.balanceOf(account2.address);