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

Wallet address validator for Bitcoin and other Altcoins.

const accountRegex = new RegExp('^[a-z0-9-.]{3,}$')
const segmentRegex = new RegExp('^[a-z][a-z0-9-]+[a-z0-9]$')
const doubleDashRegex = new RegExp('--')

module.exports = {
  isValidAddress: function (address, currency, networkType) {
    if (!accountRegex.test(address)) {
      return false
    }

    let segments = address.split('.')
    for (let i = 0; i < segments.length; i++) {
      let segment = segments[i]
      if (segment.length < 3) {
        return false
      }

      if (!segmentRegex.test(segment)) {
        return false
      }

      if (doubleDashRegex.test(segment)) {
        return false
      }
    }

    return true
  }
}