Solana Web3 Snippets

snippets.js

import * as web3 from '@solana/web3.js';

// Create connection
function createConnection(url = "https://testnet.solana.com") {
  return new web3.Connection(url);
}

const connection = createConnection();

// Generate account
import * as bip39 from 'bip39';
import nacl from 'tweetnacl';

function generateAccount(mnemonic) {
  const seed = await bip39.mnemonicToSeed(mnemonic);
  const keyPair = nacl.sign.keyPair.fromSeed(seed.slice(0, 32));
  return new web3.Account(keyPair.secretKey)
}

const mnemonic = bip39.generateMnemonic();
console.log("Your password:", mnemonic);

const account = generateAccount(mnemonic)

// Get balance
function getBalance(publicKey) {
  return connection.getBalance(publicKey);
}

const balance = getBalance(account.publicKey)

// Send transaction
function sendTransaction(recipientPublicKey, recipientAmount) {
  const transaction = new web3.Transaction().add(web3.SystemProgram.transfer({
    fromPubkey: account.publicKey,
    toPubkey: new web3.PublicKey(recipientPublicKey),
    lamports: recipientAmount,
  }));

  const signature = await web3.sendAndConfirmTransaction(
    connection,
    transaction,
    [account]
  );
}

// Get history
// https://solana-labs.github.io/solana-web3.js/class/src/connection.js~Connection.html#instance-method-getConfirmedSignaturesForAddress
function getHistory(publicKey, options = { limit: 20 }) {
  return connection.getConfirmedSignaturesForAddress2.getBalance(publicKey, options);
}

const history = getHistory(account.publicKey)

// Airdrop request
// lamports is 0.000000001 of SOL
function requestAirdrop(publicKey, lamports = 1000000) {
  return connection.requestAirdrop(publicKey, lamports)
}

Hey Allen! Really appreciate you sharing your code with us... I got a question for you, why are you using nacl instead of using Keypair from solana web3? can you implement derivation path using nacl?