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Hi i am new to bitcoin all i want to know is how to generate address using mnemonic seed?
let testnet =Bitcoin.networks.testnet;
let keypair =Bitcoin.ECPair.makeRandom({network:testnet});
let address=keypair.getAddress();
let privateKey=keypair.toWIF();
res.json("Public Address "+ address+ " "+privateKey)
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It is simpler than you think using command lines. Look at https://github.com/libbitcoin/libbitcoin-system/wiki/Altcoin-Version-Mappings#7-bitcoin-btc-bip-3944-technology-examples.
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Using bitcoinjs-lib and bip39. You can install those with npm install bitcoinjs-lib bip39 --save
const Bitcoin = require('bitcoinjs-lib');
const Bip39 = require('bip39');
const Bip32 = require('bip32');
function getAddress (node, network) {
return Bitcoin.payments.p2pkh({ pubkey: node.publicKey, network }).address
}
const mnemonic = `entire taste skull already invest view turtle surge razor key next \
buffalo venue canoe sheriff winner wash ten subject hamster scrap unit shield garden`;
const seed = Bip39.mnemonicToSeed(mnemonic);
const root = Bip32.fromSeed(seed, Bitcoin.networks.bitcoin);
const child1 = root.derivePath("m/44'/0'/0'/0/0");
const child2 = root.deriveHardened(44).deriveHardened(0).deriveHardened(0).derive(0).derive(0);
console.log(getAddress(child1)); //1ENQm8nEP7sd6dqXbAMYZ4AuqcP8Y7AtR
console.log(getAddress(child2)); //1Hb6Z1uZ1RuZ6GXTvedQ2ETYKYsMc5qynN
You can check the code is working using this website. You might also want to read up a little about BIP32, BIP39 and BIP44. An executive summary below:
The BIP32 describes how you can generate new child keys programmatically from a single key and a few other properties.
BIP39 defines a set of standard words used to mimic a key and how to transform them back to the original "seed" (the key from BIP32).
BIP44 specifies how you should compute the child keys from the parent one. You can see from my code that I used derivePath("m/44'/0'/0'/0/0"); in conformance of its specification.
