@getdelta/wallet-address-validator/src/sys_validator.js

Wallet address validator for Bitcoin and other Altcoins.

const path = require('path')
const BTCValidator = require('./bitcoin_validator');
var regexp = new RegExp('^sys1[qpzry9x8gf2tvdw0s3jn54khce6mua7l]{39}$')

module.exports = {
  isValidAddress: function (address, currency, networkType) {
    return regexp.test(address) || BTCValidator.isValidAddress(address, currency, networkType)
  }
}