transfer.ts

/// <reference types="@types/node" />

import {
    Connection,
    Transaction,
    SystemProgram,
    sendAndConfirmTransaction,
    PublicKey,
  } from "@solana/web3.js";
  import "dotenv/config";
  import { getKeypairFromEnvironment } from "@solana-developers/helpers";
  
  const suppliedToPubkey = process.argv[2] || null;
  
  if (!suppliedToPubkey) {
    console.log(`Please provide a public key to send to`);
    process.exit(1);
  };
  
  const senderKeypair = getKeypairFromEnvironment("SECRET_KEY");
  
  console.log(`suppliedToPubkey: ${suppliedToPubkey}`);
  
  const toPubkey = new PublicKey(suppliedToPubkey);
  
  const connection = new Connection("https://api.devnet.solana.com", "confirmed");
  
  console.log(
    `✅ Loaded our own keypair, the destination public key, and connected to Solana`
  );

const transaction = new Transaction();

const LAMPORTS_TO_SEND = 5000;

const sendSolInstruction = SystemProgram.transfer({
  fromPubkey: senderKeypair.publicKey,
  toPubkey,
  lamports: LAMPORTS_TO_SEND,
});

transaction.add(sendSolInstruction);

async function executeTransaction() {
    const signature = await sendAndConfirmTransaction(connection, transaction, [
        senderKeypair,
    ]);

    console.log(
        `💸 Finished! Sent ${LAMPORTS_TO_SEND} to the address ${toPubkey}. `
    );
    console.log(`Transaction signature is ${signature}!`);
}

executeTransaction().catch(console.error);