Solana: 8 byte discriminator did not match what was expected when initail PDA account

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Title: Bug in 8-byte discriminator for initial PDA account on Solana node

Introduction:

Solana is a decentralized, fast, and scalable blockchain platform that uses a consensus algorithm called Proof of Stake (PoS). One of the key features of Solana is its ability to create Program Data Accounts (PDAs), which are used to store data for programs deployed on the network. In this article, we will discuss an error that can occur when initializing a PDA account on a Solana node.

The problem:

Solana: 8 byte discriminator did not match what was expected when initail PDA account

The 8-byte discriminator in the init function does not correctly match the expected value when creating a new PDA account. This incompatibility can lead to errors during the bootstrapping process.

Code Explanation:

To better understand the problem, let’s take a look at the code snippet that creates a new PDA account:

`sunny


import { program_data_account_type } from "@solana/web3.js";
import { createProgramDataAccount } from "./program-data-account";
const mainProgramId = "main-program-id"; // Replace with the main program ID
const initialPdaPubkey = await programIdToPubkey(mainProgramId);
const initialDeserializesPubkey = await programIdToPubkey("deserializes");
const leftPubkey = await programIdToPubkey("left");
constant pdaAccountInitParams = {
public keys: [
{
type: program_data_account_type,
value: initialPdaPubkey,
},
{ type: program_data_account_type, value: remainingPdaPubkey },
],
};
const pdaAccount = await createProgramDataAccount(pdaAccountInitParams);

The error:After reviewing the code snippet, we can see that there are twopubkeysin thepdaAccountInitParamsobject. However, the expected value is only for one of them (initialPdaPubkey). This discrepancy causes the 8-byte discriminator to not match what is expected.

Conclusion:
To resolve this issue, you need to update the code snippet to match bothpubkeysin thepdaAccountInitParamsobject. Here is an updated version of the code:
sunny
import { program_data_account_type } from "@solana/web3.js";
import { createProgramDataAccount } from "./program-data-account";
const mainProgramId = "main-program-id"; // Replace with the main program ID
const initialPdaPubkey = await programIdToPubkey(mainProgramId);
const leftPubkey = await programIdToPubkey("left");
constant pdaAccountInitParams = {
public keys: [
{ type: program_data_account_type, value: initialPdaPubkey },
{ type: program_data_account_type, value: public key left },
],
};
const pdaAccount = await createProgramDataAccount(pdaAccountInitParams);

By updating the pdaAccountInitParamsobject to include bothpubkeys`, you should be able to resolve the error and successfully initialize your PDA account on a Solana node.