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Solana: Anchor test error « InstructionDidNotDeserialize »

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Error Message Analysis for Solana Anchor Test

The infamous « InstructionDidNotDeserialize » error! It’s a common issue encountered by developers building applications on the Solana blockchain. In this article, we’ll delve into the details of the instruction and provide guidance on how to resolve it.

What is the Instruction?

In Solana, instructions are a fundamental building block for creating smart contracts, which can interact with the blockchain in various ways. The remove_mint_authority instruction is used to remove an authority from a mint (a contract that controls the supply of a specific asset on the blockchain).

The Problem: InstructionDoesNotDeserialize

When you attempt to run the remove_mint_authority instruction, the Solana test suite throws an « InstructionDoesNotDeserialize » error. This error occurs when the instruction’s data is not properly deserialized from memory.

Here are some steps that might lead to this error:

  • Incorrect instruction parameters: Double-check that you’re passing the correct parameters for the remove_mint_authority instruction, including the mint_id, authority_id, and any other required fields.

  • Insufficient data storage: Ensure that the instruction’s data is being stored in a compatible format on your Solana node. If the data is not properly serialized or deserialized, it can lead to this error.

  • Incorrect usage of anchors: If you’re using anchors (a mechanism for creating and managing instructions), ensure that you’re using them correctly and that their implementation is accurate.

Resolving the Error

To resolve the « InstructionDoesNotDeserialize » error on your Solana test, follow these steps:

  • Verify instruction parameters: Double-check the parameters passed to the remove_mint_authority instruction, ensuring they are correct.

  • Check data storage

    : Verify that the instruction’s data is being stored in a compatible format. You can use tools like solscan or the Solana Web3 SDK to inspect and debug your code.

  • Verify anchor implementation: If you’re using anchors, ensure that their implementation is accurate and properly handles instruction deserialization.

Example Code

Here’s an example of how the remove_mint_authority instruction might be implemented:

use anchord::Instruction;


use anchord::instruction::{Instruction as AnchoredInstruction, InstructionType};




const REMOVE_MINT_AUTHORITY: AnchoredInstruction = AnchoredInstruction {


    // ...


};

In this example, we define a custom remove_mint_authority instruction that can be used to remove an authority from a mint.

Conclusion

The « InstructionDoesNotDeserialize » error can occur when the instruction’s data is not properly deserialized. By verifying your instruction parameters and checking data storage, you can resolve this issue on Solana. Additionally, ensuring accurate anchor implementation can prevent similar errors in the future.

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