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CRYPTOCURRENCY
5 February, 2025
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Solana JSONRPC Error Fix: Failed to retrieve transaction with invalid signature

The infamous “invalid signature” error! This issue can occur when you use the Solana Web3 library in your JavaScript applications. In this article, we will walk you through how to resolve this error and get a transaction from Solana’s JSON-RPC API.

What is JSONRPCE error: failed to retrieve transaction: invalid signature?

If SOLANA_CONNECTION.getTransaction(txHash, { commitment: 'finalized', maxSupportedTransactionVersion: 0 })' is called if the specified transaction has an invalid signature, the library will throw aJSONRPCError’ with the following message:

{
"error": {
"code": "invalidSignature",
"message": "Invalid signature"
}
}

Why does it happen?

There are several reasons why you might encounter an invalid signature error. Here are some possible reasons:

  • Transaction with zero version: If the transaction’s “maxSupportedTransactionVersion” is 0, the Solana JSON-RPC API will throw an error.
  • Invalid or missing commit: Make sure that all required commits (e.g. “finalized”, “confirmed”, etc.) are present and valid.
  • Transaction hash issues: Make sure that the transaction hash you are using is correct.

Troubleshooting

To resolve this error, follow these steps:

  • Check transaction version: Make sure that the value of “maxSupportedTransactionVersion” is not null for your use case. For more information on available versions, see the [Solana documentation] (
  • Verify transactions: Check the “solana.json” file (or equivalent) to make sure that all required commits are present and valid.
  • Update Transaction Hash: If you are using a new or updated version of Solana, update the transaction hash in your code accordingly.

Example Breakdown

const solana = require('(solana');
// Create Solana connection
const connection = new solana.Connection(solana.Key.fromUint32Array(new Uint8Array([0x01, 0x02, 0x03])), 'mainnet-beta-1');
try {
// Get the transaction hash
const txHash = await connection.getTransaction('your_transaction_hash_here', { commit: 'committed' }).id;
// Process the transaction
console.log(Transaction ID: ${txHash.id});
} catch (error) {
console.error(error);
}

In this example, make sure to replace “your_transaction_hash_here” with the actual hash you are using.

More tips

Solana: SolanaJSONRPCError: failed to get transaction: invalid signature

  • Update your Solana dependencies regularly to have the latest information on available versions and any issues.
  • Consider implementing a retry mechanism or error handling strategy to avoid crashing your application in case of unexpected errors.

By following these steps, you can resolve the “invalid signature” error from the Solana Web3 library. If you continue to experience issues, please contact us for further assistance!