Solana: ‘getBlock RPC’ request returns ‘Method not found’

Error in Solana: GetBlock RPC request returns “Method not found”

When developing a Solana application on a local node, it is important to understand the error messages that can be sent. One common issue is when a “getBlock” RPC request returns the error code “Method not found”. In this article, we will look at the cause of this error and provide instructions on how to resolve it.

What does “Method not found” mean?

When you run a Solana node using the Agave command line tool, the ‘getBlock’ RPC request is used to retrieve data from the Solana blockchain. The error code returned by the API indicates that an unknown method or function was called, which resulted in the request failing.

Invalid startup parameters

You have given your node the following startup parameters:

agave-validator \
--ledger /home/ubuntu/sol/lesger \
--accounts /home/ubuntu/sol/

Note that the “–accounts” parameter is not needed and should be removed. The agave-validator command line tool automatically compiles all the necessary files into a solana compiler script that includes the accounts module.

What is the error?

When a getBlock RPC request is made, it looks for methods in the getAccounts, getBalanceOf, and getRecentTransactionHash modules. However, in your case, one of these modules (probably “getAccounts”) does not exist or has an unknown method.

To troubleshoot this issue, follow these steps:

Step 1: Check for module existence

In your Solana project directory, run the following command to ensure that all required modules are present:

solana-compiler --compile-solc --stdout --cache=none

This will compile and print a list of compiled solc files in the “target/obj” directory.

Step 2: Check module paths

In your startup parameters, you listed the path to the ledger and accounts modules. Make sure they are correct:

agave-validator \
--ledger /home/ubuntu/sol/lesger \
--accounts /home/ubuntu/sol/accounts/

If the paths are incorrect, update them accordingly.

Step 3: Check Module Versions

Make sure that all required module versions match your project dependencies. Run the following command to check the current version:

solana-compiler --version

To help diagnose the issue, enable the-rpc-logflag when starting the node:

agave-validator --rpc-log

This will print a log message containing information about the RPC request, including the method used and any error messages returned.

Resolving the “Method not found” error

If you have tried the steps above and are still encountering the “Method not found” error, it is likely due to your Solana project’s installation or dependencies. Here are some ways to resolve this:

• Update your Cargo.toml file to ensure that all required dependencies are listed correctly.

• Check for any conflicts between the Solana compiler and other libraries you are using in your project.

• Ensure that the getAccounts module is enabled and exported correctly.

By following these steps, you should be able to resolve the “Method not found” error returned by the getBlock RPC request when using a Solana node with the Agave-validator command-line tool. If you are still having issues, please provide more information about your project’s settings and dependencies for further assistance.

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