Ethereum: Someone please help me to solve Transaction Revert problem

Ethereum Transaction Reversal Problem and Solution

As an Ethereum developer, you are likely to face a frustrating problem with transaction reversals. In this article, we will explore the problem and provide a solution to help you solve it.

Transaction Reversals in Ethereum

Transaction reversals occur when a contract or smart contract fails to deliver on its promises or returns errors due to various reasons. These reversals can be costly for developers as they may need to refund users or reissue tokens.

In your case, the problem is with the TransferHelper::transferFrom function, which is likely causing a reversal issue. The reason for this is that the transferFrom function fails when you try to exchange tokens from an address that does not have enough Ether balance in its wallet.

Code Analysis

Here is an excerpt from your code:

const config = require('./config');
// ...
TransferHelper::transferFrom: transferFrom failed
console.log(error);

The error object contains the reason for the rollback, which is likely a string indicating why the transaction failed. In this case, it says:

1TransferHelper::transferFrom: transferFrom failed

This suggests that the transferFrom function in the TransferHelper class has encountered a problem and returned error 1.

Solution

To resolve the rollback issue, you need to make sure that the wallet addresses have sufficient Ether balance. Here are some possible solutions:

1. Check wallet balance

Make sure that all wallet addresses have sufficient Ether balance before attempting to exchange tokens.

const address = '0x...'; // wallet address
const ethBalance = await EtherscanClient.getEthBalance(address);
if (ethBalance < 10  10*18) { // 10 ether minimum for a successful transaction
throw new Error(Insufficient Ether balance: ${address});
}

2. Increase wallet balance

If your wallet balances are insufficient, you may need to increase the balances temporarily before attempting the exchange.

const address = '0x...'; // wallet address
const ethBalance = await EtherscanClient.getEthBalance(address);
if (ethBalance < 10  10*18) {
const newEthBalance = await ethers.Wallet.createWithSigner(Ether).attach('0x...');
await ethers.Wallet.at(address).approve(transferToken, ethBalance + 10);
}

3. Use a wallet with a high Ether balance

If your wallet addresses have a sufficient Ether balance but you still encounter errors, consider using a wallet that has a high Ether balance.

const address = '0x...'; // wallet address
const ethBalance = await EtherscanClient.getEthBalance(address);
if (ethBalance < 100  10*18) {
const newEthBalance = ethers.Wallet.createWithSigner(Ether).attach('0x...').ethers.Wallet.at(address).approve(transferToken, ethBalance + 10);
}

4. Update the Etherscan API

If the reason for the reversal is due to a discrepancy between your Ether balance and the one expected by the TransferHelper class, consider updating the Etherscan API to provide more accurate information.

const config = require('./config');
const etherscanApi = new etherscanClient.EtherscanAPI('YOUR_API_KEY');
// ...
etherscanApi.getEthBalance(address)
.then((balance) => {
if (ethBalance !== balance) {
throw new Error(Insufficient Ether balance: ${address});
}
})
.catch((error) => {
console.error(error);
});

If you implement one or more of these solutions, you should be able to resolve the transaction rollback issue and successfully exchange tokens.

Example use case

Here is an updated version of your code that includes some error handling:

“`javascript

const config = require(‘./config’);

// …

TransferHelper::transferFrom: transferFrom failed

try {

await ethers.Wallet.at(address).