Decoding the hexadecimal string of the Eth_SendRawTransaction request in Alchemy

Since Alchemy is used as a blockchain API to facilitate MetaMask transactions, it is not uncommon to encounter issues where transactions are in a hold or “pending” state. In this article, we will look at how to decode the hexadecimal string of the “EthSendRawTransaction” request and how to resolve common issues.

What is the EthSendRawTransaction request?

The “EthSendRawTransaction” request is a basic API call that you can use to send transactions from your MetaMask wallet to the Ethereum blockchain. The request contains several parameters, including:

• “gas”: The price of gas required to execute the transaction.

• to: The recipient’s Ethereum address.

• “value”: The amount of Ether to send.

• data: Transaction data (actual contract function call).

• nonce: The block number and gas limit of the transaction.

Decode a hexadecimal string

To decode a hexadecimal string, you can use a tool like hex-dump' or write your own Python script with the following steps:

• Use a library or write your own Python script

  : Write a script that reads each byte and converts it to a hexadecimal string (for example, using thebin()’ function).

Here’s an example Python script to get you started:

import binascii
hex_string = "Your hexadecimal string here"





Split the hexadecimal string into individual bytes
bytes_list = [byte byte in hex_string.split(' ')] 
Assuming there are no spaces between each byte

Use a library to convert each byte to hexadecimal
decoded_bytes = ['{:02x}'.format(int(byte, 16)) for byte in byte_list]
print(decoded_bytes) 
Output: ["Your data bytes here", "Your single and gas limits"]

Troubleshooting common issues

• Stuck on waiting: Check that the “nonce” is correct and within the recommended range (usually between 1 million and 5 million). Check your MetaMask settings for restrictions.

• Transaction stuck due to invalid data: Verify that the transaction data is as expected. If you are sending a contract function call, make sure that the function name and parameters are correct.

• Gas price issues: Verify that the gas price is set correctly. You can use the “eth-gas-price” API endpoint provided by Alchemy to get the current gas price.

• Network errors: If you are experiencing network errors (e.g. connection timeout), try refreshing the transaction request using the alchemy-rpc library or restarting the process.

Additional tips

• Check your Alchemy API credentials: Ensure that you have correctly configured the Alchemy API credentials for both your MetaMask wallet and the Ethereum blockchain.

• Testing with a small transaction size: Try sending a smaller transaction to test the hexadecimal string decoding process.

• Keep your transactions secure: Always keep your transactions private by using a secure address or alias wallet.

By following the steps and tips below, you will be able to successfully decode the hexadecimal string of the `EthSendRawTransaction’ request in Alchemy. If you encounter any issues, please contact us for further assistance!