Deploy Your First Solana Program

import {
  Connection,
  Keypair,
  PublicKey,
  Transaction,
  TransactionInstruction,
} from "@solana/web3.js";
import { readFileSync } from "fs";
import { homedir } from "os";

const RPC = "https://devnet.helius-rpc.com/?api-key=YOUR_API_KEY";
const PROGRAM_ID = new PublicKey("YOUR_PROGRAM_ID"); // from the deploy step

async function main() {
  const connection = new Connection(RPC, "confirmed");

  // Load the same keypair the CLI created and funded.
  const secret = JSON.parse(
    readFileSync(`${homedir()}/.config/solana/id.json`, "utf8")
  );
  const payer = Keypair.fromSecretKey(Uint8Array.from(secret));

  // The hello-solana program takes no accounts and no data. It just logs.
  const instruction = new TransactionInstruction({
    keys: [],
    programId: PROGRAM_ID,
    data: Buffer.alloc(0),
  });

  const tx = new Transaction().add(instruction);
  const { blockhash } = await connection.getLatestBlockhash();
  tx.recentBlockhash = blockhash;
  tx.feePayer = payer.publicKey;
  tx.sign(payer);

  // sendTransaction submits the signed transaction to the cluster via Helius.
  const signature = await connection.sendRawTransaction(tx.serialize());
  console.log("Sent:", signature);

  // Poll getSignatureStatuses until the transaction is confirmed.
  for (let i = 0; i < 30; i++) {
    const { value } = await connection.getSignatureStatuses([signature]);
    const status = value[0];
    if (status?.confirmationStatus === "confirmed" || status?.confirmationStatus === "finalized") {
      if (status.err) throw new Error(`Failed: ${JSON.stringify(status.err)}`);
      console.log("Confirmed! View it on Solana Explorer:");
      console.log(`https://explorer.solana.com/tx/${signature}?cluster=devnet`);
      return;
    }
    await new Promise((r) => setTimeout(r, 1000));
  }
  throw new Error("Timed out waiting for confirmation");
}

main().catch(console.error);