@solana/web3.js

Create and Manage Accounts

This feature allows you to create and manage Solana accounts. The code sample demonstrates how to generate a new keypair, which includes a public key and a secret key.

const solanaWeb3 = require('@solana/web3.js');

// Generate a new keypair
const keypair = solanaWeb3.Keypair.generate();
console.log('Public Key:', keypair.publicKey.toBase58());
console.log('Secret Key:', keypair.secretKey);

Send Transactions

This feature allows you to send transactions on the Solana blockchain. The code sample demonstrates how to create a connection to the Solana devnet, airdrop SOL to an account, create a transaction to transfer SOL, and send the transaction.

const solanaWeb3 = require('@solana/web3.js');

(async () => {
  const connection = new solanaWeb3.Connection(solanaWeb3.clusterApiUrl('devnet'), 'confirmed');
  const from = solanaWeb3.Keypair.generate();
  const to = solanaWeb3.Keypair.generate();

  // Airdrop SOL to the from account
  await connection.requestAirdrop(from.publicKey, solanaWeb3.LAMPORTS_PER_SOL);

  // Create a transaction
  const transaction = new solanaWeb3.Transaction().add(
    solanaWeb3.SystemProgram.transfer({
      fromPubkey: from.publicKey,
      toPubkey: to.publicKey,
      lamports: solanaWeb3.LAMPORTS_PER_SOL / 100,
    })
  );

  // Sign and send the transaction
  const signature = await solanaWeb3.sendAndConfirmTransaction(connection, transaction, [from]);
  console.log('Transaction signature:', signature);
})();

Interact with Smart Contracts

This feature allows you to interact with smart contracts deployed on the Solana blockchain. The code sample demonstrates how to create a transaction that calls a smart contract and send the transaction.

const solanaWeb3 = require('@solana/web3.js');

(async () => {
  const connection = new solanaWeb3.Connection(solanaWeb3.clusterApiUrl('devnet'), 'confirmed');
  const programId = new solanaWeb3.PublicKey('YourProgramIdHere');
  const account = solanaWeb3.Keypair.generate();

  // Create a transaction to call a smart contract
  const transaction = new solanaWeb3.Transaction().add(
    new solanaWeb3.TransactionInstruction({
      keys: [{ pubkey: account.publicKey, isSigner: true, isWritable: true }],
      programId,
      data: Buffer.alloc(0), // Add your instruction data here
    })
  );

  // Sign and send the transaction
  const signature = await solanaWeb3.sendAndConfirmTransaction(connection, transaction, [account]);
  console.log('Transaction signature:', signature);
})();

Query Blockchain Data

This feature allows you to query data from the Solana blockchain. The code sample demonstrates how to get account information and the recent blockhash from the blockchain.

const solanaWeb3 = require('@solana/web3.js');

(async () => {
  const connection = new solanaWeb3.Connection(solanaWeb3.clusterApiUrl('devnet'), 'confirmed');
  const publicKey = new solanaWeb3.PublicKey('YourPublicKeyHere');

  // Get account info
  const accountInfo = await connection.getAccountInfo(publicKey);
  console.log('Account Info:', accountInfo);

  // Get recent blockhash
  const recentBlockhash = await connection.getRecentBlockhash();
  console.log('Recent Blockhash:', recentBlockhash);
})();