Operate | Agent

Operate | Agent is an Elixir agent used to load and run programs (known as "tapes") encoded in Bitcoin SV transactions.

About Operate

Operate is a toolset to help developers build applications, games and services on top of Bitcoin (SV). It lets you write functions, called "Ops", and enables transactions to become small but powerful programs, capable of delivering new classes of services layered over Bitcoin.

More infomation:

• Project website
• Full documentation

Installation

The package is bundled with libsecp256k1 NIF bindings. libtool, automake and autogen are required in order for the package to compile.

The package can be installed by adding operate to your list of dependencies in mix.exs.

The most recent luerl package published on hex.pm is based on Lua 5.2 which may not be compatible with all Ops. It is recommended to override the luerl dependency with the latest development version to benefit from Lua 5.3.

def deps do
  [
    {:operate, "~> 0.1.0-beta"},
    {:luerl, github: "rvirding/luerl", branch: "develop", override: true}
  ]
end

Quick start

Operate can be used straight away without starting any processes. This will run without caching so should only be used for testing and kicking the tyres.

{:ok, tape} = Operate.load_tape(txid)
{:ok, tape} = Operate.run_tape(tape)

tape.result

Process supervision

To enable caching, Operate should be started as part of your application's process supervision tree.

children = [
  {Operate, [
    cache: Operate.Cache.ConCache,
  ]},
  {ConCache, [
    name: :operate,
    ttl_check_interval: :timer.minutes(1),
    global_ttl: :timer.minutes(10),
    touch_on_read: true
  ]}
]

Supervisor.start_link(children, strategy: :one_for_one)

Configuration

Operate can be configured with the following options. Additionally, any of these options can be passed to Operate.load_tape/2 and Operate.run_tape/2 to override the configuration.

• :tape_adapter - The adapter module used to fetch the tape transaction.
• :op_adapter - The adapter module used to fetch the tape's function scripts.
• :cache - The cache module used for caching tapes and functions.
• :extensions - A list of extension modules to extend the VM state.
• :aliases - A map of references to alias functions to alternative references.
• :strict - Set false to disable strict mode and ignore missing and/or erring functions.

The default configuration:

tape_adapter: Operate.Adapter.Bob,
op_adapter: Operate.Adapter.FBHub,
cache: Operate.Cache.NoCache,
extensions: [],
aliases: %{},
strict: true

License

Operate is open source and released under the Apache-2 License.

© Copyright 2019-2020 Chronos Labs Ltd.