Solana: Add instructions to versioned transactions

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Solana: Add instructions to versioned transactions

Adding Instructions to Versioned Transactions in Solana

Versioned transactions allow you to add additional information to your transactions, making it easier to manage complex data in your smart contracts. However, when working with versioned transactions, you need to be careful not to introduce errors or inconsistencies.

In this article, we will show you how to add instructions to a versioned transaction in Solana using the solana-program library and the @solana/program/script module.

Prerequisites

Before you begin, make sure you have the necessary libraries installed:

npm install @solana-program/solana-script-program

or

yarn add @solana-program/solana-script-program

Initial Transaction Code with Instructions

const script = require('@solanaprogram/script');
// Define a function to generate instructions for the transaction
async function generateInstructions(
payload,
userPublicKey
) {
// Create a new instruction that includes the quote response and the user's public key
const instructions = [
script Instruction({
name: 'quoteResponse',
args: [payload.quoteResponse],
}),
script Instruction({
name: 'userPublicKey',
args: [userPublicKey],
}),
];
return { instructions };
}
// Create a new transaction that includes the generated instructions
async function createTransaction(
payload,
userPublicKey
) {
const transaction = await script.createTransaction(
{
fromPubkey: userPublicKey,
amount: payload.amount,
scriptLimit: true, // Enables versioning
},
generateInstructions(payload, userPublicKey)
);
return transaction;
}
// Usage example:
const payload = {
quoteResponse: '
amount: 10n,
};
const userPublicKey = 'your_user_public_key_here';
createTransaction(payload, userPublicKey).then((transaction) => {
console.log(transaction);
}).catch((error) => {
console.error(error);
});

How ​​it works

In this example, we define a function generateInstructions that takes the transaction payload and the user’s public key as arguments. This function creates two new instructions: one for the quote response and one for the user’s public key.

Next, we create a new transaction using the script.createTransaction method, passing an object with the fromPubkey, amount, and scriptLimit options.

The scriptLimit option is set to true, which enables versioning of the transaction. This means that Solana will store multiple versions of the transaction history, each containing the same instructions but potentially with different values ​​for the quote response or the user’s public key.

Best Practices

When working with versioned transactions:

• Always use scriptLimit with true to enable versioning.

• Use a consistent naming convention for your statements (e.g., quoteResponse and userPublicKey).

• Keep your statement data secure and do not share it publicly.

• Be aware of the potential impact on scalability and performance when storing multiple transaction versions.

By following these guidelines, you can effectively use versioned transactions to manage complex data in your smart contracts.

RISK MANAGEMENT ETHEREUM