Understanding Web3 Transactions with Metamask

As a Web3 developer, you’re likely familiar with the basics of interacting with Ethereum smart contracts and transactions. However, sometimes you may encounter errors when trying to execute failed transactions using Web3’s built-in APIs. In this article, we’ll delve into the specifics of getting the “T3” error code from a failed transaction in Web3.

What is a T3 Transaction?

In Ethereum, each transaction has three distinct statuses:

• 0x00: Successful

• 0x01: Failure (e.g., due to invalid signature)

• 0x02: Reverted

The “T3” error code corresponds to the failure status of 2.

Metamask and Web3 Transactions

Metamask is a popular browser extension that allows you to interact with the Ethereum blockchain without directly connecting to your local machine. When using Metamask, you can make transactions just like you would in a web page’s context menu or by clicking on the “Send” button.

Getting the T3 Error Code from Failed Transactions

To troubleshoot failed transactions and obtain the T3 ​​error code, follow these steps:

Step 1: Log in to Metamask

Ensure that you’re logged into your Metamask account. You can do this by clicking on the Metamask icon (usually represented as a compass) or by accessing the “Settings” menu and selecting “Accounts.”

Step 2: Use web3.eth.getTransaction with status option

Try using web3.eth.getTransaction to fetch the transaction details, including the error code. Here’s an example:

const web3 = new Web3(window.ethereum);


// Attempt a transaction

async function tryTransaction() {

  const tx = await web3.eth.transaction('MySmartContract', {

    from: 'YourAddress',

    gasLimit: 200000,

    gasPrice: 20, // or another value

  });

  

  if (tx.status) {

    console.log(Transaction successful! Status: ${tx.status});

    return tx;

  } else {

    // Attempt to fetch the T3 error code

    const transactionDetails = await web3.eth.getTransaction(tx.id);

    if (transactionDetails.status === '0xT3') {

      console.log('Received T3 error code!');

      return transactionDetails;

    }

  }

  

  // Return null for a failed or unknown transaction

  return null;

}

Step 3: Use web3.eth.getTransactionReceipt with status option

Alternatively, you can use web3.eth.getTransactionReceipt to fetch the receipt details from the transaction. In this case, you can search for the T3 ​​error code:

const web3 = new Web3(window.ethereum);


// Attempt a transaction

async function tryTransaction() {

  const tx = await web3.eth.transaction('MySmartContract', {

    from: 'YourAddress',

    gasLimit: 200000,

    gasPrice: 20, // or another value

  });

  

  if (tx.status) {

    console.log(Transaction successful! Status: ${tx.status});

    return tx;

  } else {

    const receipt = await web3.eth.getTransactionReceipt(tx.hash);

    if (receipt.error && receipt.error.code === 'T3') {

      console.log('Received T3 error code!');

      return receipt;

    }

  }

  

  // Return null for a failed or unknown transaction

  return null;

}

Conclusion

By following these steps, you should be able to retrieve the T3 ​​error code from failed transactions using Web3’s APIs. Remember to test and optimize your code to handle different scenarios and edge cases.

Resources

If you’re still facing issues or need further assistance, refer to the following resources:

• Ethereum Developer documentation: <

• MetaMask documentation: <