A rails gem that enables any model to have bitcoin payments. The polymorphic table bitcoin_payments creates payments with unique addresses based on a BIP32 deterministic seed using https://github.com/wink/money-tree and uses the (https://helloblock.io OR https://blockchain.info/) API to check for payments.
Payments have 5 states: pending, partial_payment, paid_in_full, confirmed, comped
No private keys needed, No bitcoind blockchain indexing on new servers, just address and payments.
Master now supports multiple Rails versions.
No longer maintained Support for Rails 5.1
Add this line to your application's Gemfile: (I might be too lazy to update RubyGems all the time)
gem 'bitcoin_payable', git: 'https://github.com/Sailias/bitcoin_payable', branch: 'master'
And then execute:
$ bundle
$ rails g bitcoin_payable:install --skip
$ bundle exec rake db:migrate
Or install it yourself as:
$ gem install bitcoin_payable
config/initializers/bitcoin_payable.rb
BitcoinPayable.config do |config|
config.currency = :usd # Default currency
config.node_path = "m/0/"
config.master_public_key = "your xpub master public key here"
config.testnet = true
config.adapter = 'blocktrail' # Use blocktrail, blockchain_info or blockcypher
# Confirmations (defaults to 6)
config.confirmations = 6
# The rate for Bitcoin you'll be using to calculate prices
# Optional setting. Default to :daily_average
# :last The last market's price
# :high Today's highest price
# :low Today's lowest price
# :daily_average The daily average price
# :weekly_average The weekly average price
# :monthly_average The monthly average price
config.rate_calculation = :daily_average
# Webhooks
# Only available for blocktrail adapter
config.allowwebhooks = true
config.webhook_domain = "subdomain.domain.com:port"
end
-
In order to use the bitcoin network and issue real addresses, BitcoinPayable.config.testnet must be set to false *
BitcoinPayable.config.testnet = false
If you use config.adapter = 'blocktrail' * The only one supporting webhooks* you'll need to set the following environment variables:
# Basic authentification for your webhooks
ENV['BITCOIN_PAYABLE_WEBHOOK_USER']= "username"
ENV['BITCOIN_PAYABLE_WEBHOOK_PASS']= "password"
# API keys provided by Blocktrail.com
ENV['BLOCKTRAIL_API_KEY']= "key"
ENV['BLOCKTRAIL_API_SECRET']= "secret"
You can obtain your API keys at https://www.blocktrail.com/dev/login
The derivation path for the node that will be creating your addresses
A BIP32 MPK in "Extended Key" format.
Public net starts with: xpub Testnet starts with: tpub
class Product < ActiveRecord::Base
has_bitcoin_payments
end
def create_payment(amount_in_cents)
self.bitcoin_payments.create!(reason: 'sale', price: amount_in_cents)
end
BitcoinPayable also supports local currency conversions and BTC exchange rates.
The process_prices rake task connects to api.bitcoinaverage.com to get the 24 hour weighted average of BTC for your specified currency.
It then updates all payments that havent received an update in the last 30 minutes with the new value owing in BTC.
This honors the price of a payment for 30 minutes at a time.
rake bitcoin_payable:process_prices
All payments are calculated against the dollar amount of the payment. So a bitcoin_payment for $49.99 will have it's value calculated in BTC.
It will stay at that price for 30 minutes. When a payment is made, a transaction is created that stores the BTC in satoshis paid, and the exchange rate is was paid at.
This is very valuable for accounting later. (capital gains of all payments received)
If a partial payment is made, the BTC value is recalculated for the remaining dollar amount with the latest exchange rate. This means that if someone pays 0.01 for a 0.5 payment, that 0.01 is converted into dollars at the time of processing and the remaining amount is calculated in dollars and the remaining amount in BTC is issued. (If BTC bombs, that value could be greater than 0.5 now)
This prevents people from gaming the payments by paying very little BTC in hopes the price will rise. Payments are not recalculated based on the current value of BTC, but in dollars.
To run the payment processor:
rake bitcoin_payable:process_payments
Do no run the payment processor if you have webhooks set up as new transactions will be processed automatically by the webhook.
Use the bitcoin_payment_paid method
def Product < ActiveRecord::Base
has_bitcoin_payments
def create_payment(amount_in_cents)
self.bitcoin_payments.create!(reason: 'sale', price: amount_in_cents)
end
def bitcoin_payment_paid
self.ship!
end
end
Use the bitcoin_payment_status_changed method
def bitcoin_payment_status_changed(from_state, to_state)
if to_state == "confirmed"
self.ship!
elsif to_state == "paid_in_full"
self.notify_payment_received(self)
end
end
This will bypass the payment, set the state to comped and call back to your app that the payment has been processed.
@bitcoin_payment.comp
bitcoin_payment = @product.bitcoin_payments.first
bitcoin_payment.transactions.each do |transaction|
puts transaction.block_hash
puts transaction.block_time
puts transaction.transaction_hash
puts transaction.estimated_value
puts transaction.estimated_time
puts transaction.btc_conversion
end
- Fork it
- Create your feature branch (
git checkout -b my-new-feature) - Commit your changes (
git commit -am 'Add some feature') - Push to the branch (
git push origin my-new-feature) - Create new Pull Request