crypto_address_validator

CryptoAddressValidator

Simple wallet address validator and normalizer for cryptocurrencies addresses in Ruby.

Inspired by vtm9/adequate_crypto_address.

Installation

Add this line to your application's Gemfile:

gem 'crypto_address_validator'

Or install it yourself as:

gem install crypto_address_validator

Main API

.valid? (address, currency [, type = :prod, type = [])

Parameters

• address - Wallet address to validate.
• currency - Currency name string or symbol in any case, :bitcoin or 'BTC' or :btc or 'BitCoin'
• type - Optional. You can enforce validation with specific type or an array of types. Not all currencies support types.

Returns true if the address (string) is a valid wallet address for the crypto currency specified, see below for supported currencies.

Supported crypto currencies

• Bitcoin/BTC, 'bitcoin' or 'BTC' types: :segwit_v0_keyhash :segwit_v0_scripthash :hash160 :p2sh
• BitcoinCash/BCH, 'bitcoincash' or 'BCH' types: :p2sh :p2pkh :p2pkhtest :p2shtest
• Dash, 'dash' or 'DASH' types: :prod :test
• Zcash/ZEC, 'zcash' or 'ZEC' types: :prod :test
• Ethereum/ETH, 'ethereum' or 'ETH'
• Ripple/XRP, 'ripple' or 'XRP'

Usage

Validation

require 'crypto_address_validator'
# BTC
CryptoAddressValidator.valid?('12QeMLzSrB8XH8FvEzPMVoRxVAzTr5XM2y', 'BTC') #=> true
CryptoAddressValidator.valid?('3NJZLcZEEYBpxYEUGewU4knsQRn1WM5Fkt', :bitcoin, :p2sh) #=> true

# BTC(non SegWit address validation)
CryptoAddressValidator.valid?('3NJZLcZEEYBpxYEUGewU4knsQRn1WM5Fkt', :bitcoin, [:p2sh, :hash160]) #=> true

# BCH
CryptoAddressValidator.valid?('bitcoincash:qrtj3rd8524cndt2eew3s6wljqggmne00sgh4kfypk', :bch) #=> true
CryptoAddressValidator.valid?('mmRH4e9WW4ekZUP5HvBScfUyaSUjfQRyvD', :BCH, :p2pkhtest) #=> true

# ETH
CryptoAddressValidator.valid?('0xde709f2102306220921060314715629080e2fb77', :ETH) #=> true
CryptoAddressValidator.valid?('de709f2102306220921060314715629080e2fb77', :ethereum) #=> true

Normalization

*Not all currencies support this feature.

require 'crypto_address_validator'

# BCH
CryptoAddressValidator.address('mmRH4e9WW4ekZUP5HvBScfUyaSUjfQRyvD', 'bch').cash_address #=> "bchtest:qpqtmmfpw79thzq5z7s0spcd87uhn6d34uqqem83hf"
CryptoAddressValidator.address('bitcoincash:qrtj3rd8524cndt2eew3s6wljqggmne00sgh4kfypk', 'bch').legacy_address #=> "1LcerwTc1oPsMtByDCNUXFxReZpN1EXHoe"

address_string = 'qrtj3rd8524cndt2eew3s6wljqggmne00sgh4kfypk'
addr = CryptoAddressValidator.address(address_string, 'bch')
addr.prefix #=> "bitcoincash"
addr.type #=> :p2pkh
addr.address #=> "bitcoincash:qrtj3rd8524cndt2eew3s6wljqggmne00sgh4kfypk"

# ETH
CryptoAddressValidator.address('D1220A0cf47c7B9Be7A2E6BA89F429762e7b9aDb', 'eth').address #=> "0xD1220A0cf47c7B9Be7A2E6BA89F429762e7b9aDb"

ActiveRecord validation example

class Model < ActiveRecord::Base
  attribute :address, :string
  attribute :dest_tag, :string
  attribute :currency, :string

  validate  :validate_address_type
  validate  :validate_destination_tag

  def validate_address_type
    errors.add(:address, 'invalid address') unless CryptoAddressValidator.valid?(address, currency)
  end

  # for Ripple
  def validate_destination_tag
    errors.add(:dest_tag, 'invalid destination tag') if dest_tag.present? && !(dest_tag =~ /\A\d{1,10}\z/)
  end
end

Add your currnecy

# frozen_string_literal: true
# for Rails /config/initializers/crypto_address_validator.rb
module CryptoAddressValidator
  class Coin
    attr_reader :address

    def initialize(address_sring)
      @address = address_sring
    end

    def valid?(_type)
      address.present?
    end
  end
end

CryptoAddressValidator.valid?('addr', :coin) #=> true

Development

Run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

Contributing

• Fork the repo
• Grab dependencies: bundle install
• Make sure everything is working: bundle exec rake spec
• Make your changes
• Test your changes
• Create a Pull Request

Notes

Bug reports and pull requests are welcome on GitHub at https://github.com/sequoir/crypto_address_validator/issues