Craft Send (Beta)

import { create_invite_code, invite_code_to_priv_key } from "./utils.js";
import {
  Connection,
  Keypair,
  VersionedTransaction,
} from "@solana/web3.js";
import fs from "fs";

const connection = new Connection('insert-rpc');
const senderPrivateKey = JSON.parse(fs.readFileSync('/Path/to/sender/id.json', 'utf8').trim());
const sender = Keypair.fromSecretKey(new Uint8Array(senderPrivateKey));

// STEP 1: Create 12-character invite code
const invite_code = await create_invite_code();

// STEP 2: Derive secret key (public and private key)
const secret_key = invite_code_to_priv_key(invite_code);

// STEP 3: Use secret key to create Solana Keypair instance
const recipient = Keypair.fromSecretKey(secret_key);

// STEP 4: Post request for a Send transaction
const craftSendTransaction = await (
    await fetch ('https://lite-api.jup.ag/send/v1/craft-send', {
        method: 'POST',
        headers: {
            'Content-Type': 'application/json',
        },
        body: JSON.stringify({
            inviteSigner: recipient.publicKey.toBase58(),
            sender: sender.publicKey.toBase58(),
            amount: "10000000", // atomic amount before decimals
            // mint: "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v", // Defaults to SOL if `mint` is not provided
        }, null, 2)
    })
).json();

// STEP 5: Use sender and receipient keypair to sign and send to network
const transaction = VersionedTransaction.deserialize(Buffer.from(craftSendTransaction.tx, 'base64'));
transaction.sign([sender, recipient]); // SIGN with both SENDER and RECIPIENT keypair
const transactionBinary = transaction.serialize();
const blockhashInfo = await connection.getLatestBlockhashAndContext({ commitment: "confirmed" });

const signature = await connection.sendRawTransaction(transactionBinary, {
  maxRetries: 0,
  skipPreflight: true,
});

// Log the signature immediately after sending, before confirmation
console.log(`Transaction sent: https://solscan.io/tx/${signature}`);

try {
  const confirmation = await connection.confirmTransaction({
    signature,
    blockhash: blockhashInfo.value.blockhash,
    lastValidBlockHeight: blockhashInfo.value.lastValidBlockHeight,
  }, "confirmed");

  if (confirmation.value.err) {
    console.error(`Transaction failed: ${JSON.stringify(confirmation.value.err)}`);
    console.log(`Examine the failed transaction: https://solscan.io/tx/${signature}`);
  } else {
    console.log(`Transaction successful: https://solscan.io/tx/${signature}`);
  };
} catch (error) {
  console.error(`Error confirming transaction: ${error}`);
  console.log(`Examine the transaction status: https://solscan.io/tx/${signature}`);
};