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Solana Web3 Snippets
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import { | |
Account, | |
clusterApiUrl, | |
Connection, | |
PublicKey, | |
sendAndConfirmTransaction, | |
SystemProgram, | |
Transaction, | |
} from '@solana/web3.js'; | |
// Create connection | |
function createConnection(url = clusterApiUrl('devnet')) { | |
return new Connection(url); | |
} | |
const connection = createConnection(); | |
// Generate account | |
import * as bip39 from 'bip39'; | |
import nacl from 'tweetnacl'; | |
function generateAccount(mnemonic) { | |
const seed = bip39.mnemonicToSeedSync(mnemonic); // prefer async mnemonicToSeed | |
const keyPair = nacl.sign.keyPair.fromSeed(seed.slice(0, 32)); | |
return new Account(keyPair.secretKey); | |
} | |
const mnemonic = bip39.generateMnemonic(); | |
console.log('Your password:', mnemonic); | |
const account = generateAccount(mnemonic); | |
console.log('Account:', account); | |
// Get balance | |
function getBalance(connection, publicKey) { | |
return connection.getBalance(publicKey); | |
} | |
const balance = getBalance(connection, account.publicKey); | |
console.log('Balance:', balance); | |
// Airdrop request | |
// lamports is 0.000000001 of SOL | |
function requestAirdrop(connection, publicKey, lamports = 1000000) { | |
return connection.requestAirdrop(publicKey, lamports); | |
} | |
requestAirdrop(connection, account.publicKey); | |
// Send transaction | |
async function sendTransaction(connection, recipientPublicKey, recipientAmount, payer) { | |
const transaction = new Transaction().add( | |
SystemProgram.transfer({ | |
fromPubkey: payer.publicKey, | |
toPubkey: new PublicKey(recipientPublicKey), | |
lamports: recipientAmount, | |
}), | |
); | |
const signature = await sendAndConfirmTransaction(connection, transaction, [payer]); | |
return signature; | |
} | |
// sendTransaction(connection, someaccount.publicKey, 1000, account); | |
// Get history | |
// https://solana-labs.github.io/solana-web3.js/class/src/connection.js~Connection.html#instance-method-getConfirmedSignaturesForAddress | |
function getHistory(connection, publicKey, options = { limit: 20 }) { | |
return connection.getConfirmedSignaturesForAddress2(publicKey, options); | |
} | |
const history = getHistory(connection, account.publicKey); | |
console.log('Signatures:', history); |
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