Gold

Opinionated interface to Bitcoin core JSON-RPC API. Currently in MVP mode: architecture is ready and stable, doesn't fully implement all of the RPC commands yet, although this would be trivial to do. Open an issue (or better yet, create a pull request) if you want to see more functionality added.

Documentation: http://hexdocs.pm/gold/

Usage

Add Gold as a dependency in your mix.exs file.

def deps do
  [ { :gold, "~> 0.16" } ]
end

You will also need to configure your application to connect to the correct node

config :gold, :my_node, [
  hostname: "localhost",
  port: 8332,
  user: "bitcoinrpc",
  password: "changeme"
]

After you are done, run mix deps.get in your shell to fetch and compile Gold. Start an interactive Elixir shell with iex -S mix.

iex> Gold.getbalance!(:my_node)
#Decimal<9074.99999583>
iex> Gold.listtransactions!(:my_node)
[%Gold.Transaction{account: "", address: "mvZZq9C8ZiK85fLPL26N7n81D5jKu8SgcD",
  amount: #Decimal<12.50000226>,
  blockhash: "7e5ca54602567bec3fa7067344ae0916236e01d2c9f6cae80509b291f97edf0f",
  blockindex: 0, category: :immature, comment: nil, confirmations: 3, fee: nil,
  otheraccount: nil, time: 1442466804, timereceived: 1442466804,
  txid: "6c173c5b90bc0c565e15d0144d57e81ec9ce95aac86f0e77c354d7acf1fbf68b",
  vout: 0}]

Testing

You need bitcoind in regtest mode to run tests. To get it go to: https://bitcoin.org/en/download.

After you are done installing you need to copy bitcoin.conf file to you .bitcoin directory (or just run bitcoind with proper parameters). You also have to start it with args: -regtest -daemon.

When you are done setting everything up you can run tests with mix test

Features

• Uses the Decimal library for representing BTC amounts, to avoid loss of precision;
• Directly maps Bitcoin's RPC functions;