wallet.js

'use strict';

const nkn = require('../lib');

const password = '42';

(async function () {
  // random new wallet
  let wallet = new nkn.Wallet({ password });

  // wallet from seed
  wallet = new nkn.Wallet({ seed: wallet.getSeed(), password });

  // save wallet to json
  let walletJson = JSON.stringify(wallet);

  // load wallet from json and password
  wallet = nkn.Wallet.fromJSON(walletJson, { password });

  // or load wallet asynchronously to avoid blocking eventloop
  wallet = await nkn.Wallet.fromJSON(walletJson, { password, async: true });

  // verify password of a wallet
  console.log('verify password', wallet.verifyPassword(password));

  // verify password of a wallet asynchronously to avoid blocking eventloop
  console.log('verify password', await wallet.verifyPassword(password, { async: true }));

  // verify whether an address is a valid NKN wallet address (static method)
  console.log('verify address:', nkn.Wallet.verifyAddress(wallet.address));

  // get balance of this wallet
  console.log('balance:', await wallet.getBalance());

  // get balance of an address
  console.log('balance:', await wallet.getBalance(wallet.address));

  // get balance of an address (static method)
  console.log('balance:', await nkn.Wallet.getBalance(wallet.address));

  // get nonce for next transaction of this wallet
  console.log('nonce:', await wallet.getNonce());

  // get nonce of an address, does not include nonce in rpc node's transaction pool
  console.log('nonce:', await wallet.getNonce(wallet.address, { txPool: false }));

  // get nonce of an address (static method)
  console.log('nonce:', await nkn.Wallet.getNonce(wallet.address, { txPool: false }));

  // call below will fail because a new account has no balance
  try {
    // transfer token to some address
    console.log('transfer txn hash:', await wallet.transferTo(wallet.address, 1, { fee: 0.1, attrs: 'hello world' }));

    // amount and fee can also be string to prevent accuracy loss
    console.log('transfer txn hash:', await wallet.transferTo(wallet.address, '1', { fee: '0.1' }));

    // subscribe to a topic for ths pubkey of the wallet for next 100 blocks
    console.log('subscribe txn hash:', await wallet.subscribe('topic', 100, 'identifier', 'meta', { fee: '0.1' }));

    // unsubscribe from a topic
    console.log('unsubscribe txn hash:', await wallet.unsubscribe('topic', 'identifier', { fee: '0.1' }));

    // register name
    console.log('register name txn hash:', await wallet.registerName('name'));

    // transfer name
    console.log('transfer name txn hash:', await wallet.transferName('name', wallet.getPublicKey()));

    // delete name
    console.log('delete name txn hash:', await wallet.deleteName('name'));
  } catch (e) {
    console.error(e);
  }
})();