Solana: failed to get recent blockhash: Method not found in Connection.getRecentBlockhash of vanilla javascript mini app - F.I.S.A.R. A.P.S.

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It looks like you’re facing an issue with retrieving recent block hashes from the Solana blockchain in a vanilla JavaScript mini app using HTML and AJAX with a CDN.

The error message Method not found at Connection.getRecentBlockhash on vanilla javascript indicates that there is no method called getRecentBlockhash available in the Connection object, which is likely due to a compatibility issue or an outdated library.

Here’s an article that should help you resolve this issue:

Failed to Get Recent Block Hash from Solana Blockchain with Vanilla JavaScript Mini App

Error Message:

Method not found at Connection.getRecentBlockhash on vanilla javascript

Solution:

• Check the libraries used: Make sure you’re using a library that supports recent block hashes, such as solana-connect or solo-js. You can check the documentation for the library you’re using to see if it provides recent block hash functionality.

• Use the getRecentBlockhashAsync method:

  Instead of calling getRecentBlockhash, try using the getRecentBlockhashAsync method, which returns an asynchronous function that retrieves the latest block hash.

Here’s an example:

const connection = new Web3Connection(url); // Replace with your Solana wallet URL
async function getRecentBlockhash() {
  const recentHash = await connection.getRecentBlockhashAsync();
  return recentHash;
}

Code Example:

  
  <script src="
    const button = document.getElementById('getRecentBlockhashButton');
    const recentHash = null;
    button.addEventListener('click', async () => {
      recentHash = await getRecentBlockhash();
      console.log(recentHash);
    });

CDN Setup:

If you’re using a CDN, make sure to add the following script tag to your HTML:

<script src="

This should resolve the error and allow you to retrieve recent block hashes from the Solana blockchain using a vanilla JavaScript mini app.

Note:

If you’re experiencing issues with compatibility or library limitations, consider updating your libraries or exploring alternative solutions that may be more suitable for your use case.