Memo Transaction Builder

Build a utility for creating and managing memo transactions on Solana. The utility should create transaction instructions that write string messages to the blockchain using a memo program.

Requirements

Your implementation should:

1. Create a function that builds a transaction instruction for writing a memo to the blockchain
2. Accept a memo string message and a payer public key as inputs
3. Properly configure the instruction with the correct program ID, accounts, and data
4. Support the standard Solana memo program (program ID: MemoSq4gqABAXKb96qnH8TysNcWxMyWCqXgDLGmfcHr)
5. Encode the memo message as UTF-8 bytes in the instruction data

Test Cases

• Given a memo message "Hello Solana" and a payer public key, the function creates a transaction instruction with the correct program ID @test
• The instruction data contains the UTF-8 encoded memo message @test
• The instruction includes the payer as a signer account @test

Implementation

@generates

API

import { PublicKey, TransactionInstruction } from '@solana/web3.js';

/**
 * Creates a transaction instruction for writing a memo to the Solana blockchain.
 *
 * @param message - The memo message to write (will be UTF-8 encoded)
 * @param payer - The public key of the account paying for and signing the transaction
 * @returns A TransactionInstruction configured for the memo program
 */
export function createMemoInstruction(
  message: string,
  payer: PublicKey
): TransactionInstruction;

Dependencies { .dependencies }

@solana/web3.js { .dependency }

Provides Solana blockchain interaction capabilities including transaction instruction construction.