Solana Kit Development Guide

A comprehensive guide for building Solana applications with @solana/kit - the modern, tree-shakeable, zero-dependency JavaScript SDK from Anza.

Overview

Solana Kit (formerly web3.js 2.0) is a complete rewrite of the Solana JavaScript SDK with:

Tree-shakeable: Only ship code you use (-78% bundle size)

Zero dependencies: No third-party packages

Functional design: Composable, no classes

10x faster crypto: Native Ed25519 support

TypeScript-first: Full type safety

Quick Start

Installation

npm install @solana/kit

For specific program interactions:

npm install @solana-program/system @solana-program/token

Minimal Example

```typescript
import {
createSolanaRpc,
createSolanaRpcSubscriptions,
generateKeyPairSigner,
lamports,
pipe,
createTransactionMessage,
setTransactionMessageFeePayer,
setTransactionMessageLifetimeUsingBlockhash,
appendTransactionMessageInstruction,
signTransactionMessageWithSigners,
sendAndConfirmTransactionFactory,
getSignatureFromTransaction,
} from "@solana/kit";
import { getTransferSolInstruction } from "@solana-program/system";

const LAMPORTS_PER_SOL = BigInt(1_000_000_000);

async function transferSol() {
// 1. Connect to RPC
const rpc = createSolanaRpc("https://api.devnet.solana.com");
const rpcSubscriptions = createSolanaRpcSubscriptions("wss://api.devnet.solana.com");

// 2. Create signers
const sender = await generateKeyPairSigner();
const recipient = await generateKeyPairSigner();

// 3. Get blockhash
const { value: latestBlockhash } = await rpc.getLatestBlockhash().send();

// 4. Build transaction with pipe
const transactionMessage = pipe(
createTransactionMessage({ version: 0 }),
(tx) => setTransactionMessageFeePayer(sender.address, tx),
(tx) => setTransactionMessageLifetimeUsingBlockhash(latestBlockhash, tx),
(tx) => appendTransactionMessageInstruction(
getTransferSolIns