import {
    address,
    appendTransactionMessageInstruction,
    createEmptyClient,
    createTransactionMessage,
    lamports,
    pipe,
    setTransactionMessageFeePayerSigner,
    setTransactionMessageLifetimeUsingBlockhash,
    signTransactionMessageWithSigners,
} from '@solana/kit';
import { litesvm, payerFromFile } from '@solana/kit-plugins';
import { getTransferSolInstruction } from '@solana-program/system';

// Create client with LiteSVM and payer
const recipientAddress = address('REPLACE_WITH_RECIPIENT_ADDRESS');
const client = createEmptyClient()
    .use(litesvm())
    .use(payerFromFile('path/to/keypair.json'));

// Fund the payer
client.svm.airdrop(client.payer.address, lamports(10_000_000_000n));

// Check initial balances
const senderInitial = client.svm.getBalance(client.payer.address) ?? 0n;
console.log('Sender initial:', Number(senderInitial) / 1e9, 'SOL');

// Build the transfer instruction
const transferIx = getTransferSolInstruction({
    source: client.payer,
    destination: recipientAddress,
    amount: lamports(1_000_000_000n), // 1 SOL
});

// Build the transaction message
const transactionMessage = pipe(
    createTransactionMessage({ version: 0 }),
    tx => setTransactionMessageFeePayerSigner(client.payer, tx),
    tx => setTransactionMessageLifetimeUsingBlockhash(
        client.svm.latestBlockhashLifetime(),
        tx
    ),
    tx => appendTransactionMessageInstruction(transferIx, tx),
);

// Sign and send
const signedTx = await signTransactionMessageWithSigners(transactionMessage);
const result = client.svm.sendTransaction(signedTx);

// Check for errors
if ('err' in result && result.err()) {
    console.error('Transaction failed:', result.err());
}

// Log results
console.log('Transaction successful!');
console.log('Compute units:', result.computeUnitsConsumed());

// Check final balances
const senderFinal = client.svm.getBalance(client.payer.address) ?? 0n;
const recipientFinal = client.svm.getBalance(recipientAddress) ?? 0n;
console.log('Sender final:', Number(senderFinal) / 1e9, 'SOL');
console.log('Recipient final:', Number(recipientFinal) / 1e9, 'SOL');

Sender initial: 10 SOL
Transaction successful!
Compute units: 150n
Sender final: 8.999995 SOL
Recipient final: 1 SOL