transfer.ts

import { Connection, PublicKey, SystemProgram, Transaction, clusterApiUrl, sendAndConfirmRawTransaction, sendAndConfirmTransaction } from "@solana/web3.js";
import "dotenv/config";
import { getKeypairFromEnvironment } from "@solana-developers/helpers";

const suppliedToAddress = process.argv[2] || null;
if(!suppliedToAddress) {
    console.log("Please provide a public key to send to");
    process.exit(1);
}

const senderKeypair = getKeypairFromEnvironment("SECRET_KEY");

console.log(`suppliedToAddress: ${suppliedToAddress}`);

const toPubkey = new PublicKey(suppliedToAddress);

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);

const signature = await sendAndConfirmTransaction(connection, transaction, [
    senderKeypair,
]);

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