bitcoin_node's Introduction

BitcoinNode

Study of Bitcoin protocol by implementing a simple node in the p2p bitcoin network.

Using as much as Ruby stdlib as possible. Main foreign dependency is Celluloid::IO

Installation

Add to your Gemfile gem 'bitcoin_node' or locally run

$ gem install bitcoin_node

Test

$ bundle exec rspec

Usage

Create messages

require 'bitcoin_node'

ping = BitcoinNode::Protocol::Messages.ping
# => #<BitcoinNode::Protocol::Message:0x007feb24e1fa20 @payload=#<Ping {:nonce=>#<struct Integer64Field 12031756400052209357>}>, @command="ping">

ping.raw
# => "\xF9\xBE\xB4\xD9ping\x00\x00\x00\x00\x00\x00\x00\x00\b\x00\x00\x00\xAB\x0F\x0FZ\x95\xDC{\xA1\xB1i\x11]"

version = BN::Protocol::Messages.version

Single client

require 'bitcoin_node'

host = '144.76.217.165'

client = BN::P2P::Client.connect(host)

client.send(BN::Protocol::Messages.version)
client.send(BN::Protocol::Messages.ping)
client.send(BN::Protocol::Messages.getaddr)

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bitcoin_node's Issues

Integration tests fail with 'Errno::EADDRINUSE'

All tests in spec/integration/version_handshake_spec.rb bind BN::P2p::Server to port 3333. It's not ensured that the socket opened by a previous test is already closed when the next test starts.

This leads to an error:
Errno::EADDRINUSE: Address already in use - bind(2) for "localhost" port 3333

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