transfer.ts

import {
    Connection,
    Transaction,
    SystemProgram,
    sendAndConfirmTransaction,
    PublicKey,
} from "@solana/web3.js";

import "dotenv/config"

import { getKeypairFromEnvironment } from "@solana-developers/helpers";

//get an argument passed
const suppliedToPubkey = process.argv[2] || null;

if (!suppliedToPubkey) {
    console.log(`Please provide a public key to send to`);
    process.exit(1);
}

//loaded key pair 
const senderKeypair = getKeypairFromEnvironment("SECRET_KEY");

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

const toPubkey = new PublicKey(suppliedToPubkey);

//connection establishment
const connection = new Connection("https://api.devnet.solana.com", "confirmed");

console.log(
    `✅ Loaded our own keypair, the destination public key, and connected to Solana `
);

// npx esrun transfer.ts ExriryaCnC49HeRu1rZnqeevYuXHcQajr1qP34Zu4MtS>


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}!`);  // which was signed by sender


/// my address : ExriryaCnC49HeRu1rZnqeevYuXHcQajr1qP34Zu4MtS