transfer.ts

import { Transaction, SystemProgram, Connection, Keypair, LAMPORTS_PER_SOL, sendAndConfirmTransaction, PublicKey } from "@solana/web3.js"
import wallet from "./dev_wallet.json"

const from = Keypair.fromSecretKey(new Uint8Array(wallet));
const to = new PublicKey("6jcV1bC9MxYYWCCmpMVM2Y8Jh8BAcqnF1eM1dhfTeGQ4")

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

(async () => {
  try {
    const balance = await connection.getBalance(from.publicKey)
    const transaction = new Transaction().add(
      SystemProgram.transfer({
        fromPubkey: from.publicKey,
        toPubkey: to,
        lamports: balance,
      })
    );
    transaction.recentBlockhash = (await
      connection.getLatestBlockhash('confirmed')).blockhash;
    transaction.feePayer = from.publicKey;

    const fee = (await connection.getFeeForMessage(transaction.compileMessage(), 'confirmed')).value || 0;
    // Remove our transfer instruction to replace it
    transaction.instructions.pop();

    // Now add the instruction back with correct amount of lamports
    transaction.add(SystemProgram.transfer({
      fromPubkey: from.publicKey,
      toPubkey: to,
      lamports: balance - fee,
    })
    );
    // Sign transaction, broadcast, and confirm
    const signature = await sendAndConfirmTransaction(
      connection,
      transaction,
      [from]
    );
    console.log(`Success! Check out your TX here:
https://explorer.solana.com/tx/${signature}?cluster=devnet`);
  } catch (e) {
    console.error(`Oops, something went wrong: ${e}`)
  }
})();