defmodule BSV do
  @moduledoc """
  BSV-ex. Elixir Bitcoin SV library.

  The intent of this library is to provide a full-featured BSV library that is
  broadly comparable in scope to [Money Button's BSV Javascript library](https://github.com/moneybutton/bsv).

  Currently this library offers the following:

  * General crypto functions - wide range of hashing, ECDSA and RSA encryption and signature functions.
  * Bitcoin specific crypto - Electrum-compatible message encryption and signatures.
  * Bitcoin key pair generation and related functions.
  * BIP-39 mnemonic phrase generation and deterministic keys.
  * Raw transaction parsing, manipulation and serialization.

  What is NOT in this library:

  * P2P - this is not a full node implementation.

  ## Installation

  As this package uses `libsecp256k1` NIF bindings, please ensure you have
  `libtool`, `automake` and `autogen` installed in order for the package to
  compile.

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

      def deps do
        [
          {:bsv, "~> 0.1.0"}
        ]
      end

  ## Usage

  Many examples are demonstrated throught the documentation, but see the
  following for some quick-start examples:

  ### Key pairs and addresses

  For more examples refer to `BSV.KeyPair` and `BSV.Address`.

      iex> keys = BSV.KeyPair.generate
      %BSV.KeyPair{
        network: :main,
        private_key: <<1, 249, 98, 144, 230, 172, 5, 56, 197, 143, 133, 240, 144, 223, 25, 32, 55, 42, 159, 26, 128, 66, 149, 49, 235, 179, 116, 11, 209, 235, 240, 163>>,
        public_key: <<3, 173, 251, 14, 108, 217, 224, 80, 133, 244, 200, 33, 191, 137, 80, 62, 141, 133, 166, 201, 224, 141, 101, 152, 144, 92, 237, 54, 220, 131, 58, 26, 4>>
      }

      iex> address = BSV.Address.to_string(keys)
      "1MzYtHPymTjgxx9npR6Pu9ZCUhtU9hHYTL"

  ### Mnemonic phrase and deterministic keys

  For further details and examples refer to `BSV.Mnemonic`,
  `BSV.Extended.PrivateKey`, `BSV.Extended.PublicKey` and `BSV.Extended.Children`.

      iex> mnemonic = BSV.Mnemonic.generate
      "various attitude grain market food wheat arena disagree soccer dust wrestle auction fiber wrestle sort wonder vital gym ill word amazing sniff have biology"

      iex> master = BSV.Mnemonic.to_seed(mnemonic)
      ...> |> BSV.Extended.PrivateKey.from_seed
      %BSV.Extended.PrivateKey{
        chain_code: <<164, 12, 192, 154, 59, 209, 85, 172, 76, 7, 42, 138, 247, 125, 161, 30, 135, 25, 124, 160, 170, 234, 126, 162, 228, 146, 135, 232, 67, 181, 219, 91>>,
        child_number: 0,
        depth: 0,
        fingerprint: <<0, 0, 0, 0>>,
        key: <<111, 24, 247, 85, 107, 58, 162, 225, 135, 190, 185, 200, 226, 131, 68, 152, 159, 111, 232, 166, 21, 211, 235, 180, 140, 190, 109, 39, 31, 33, 107, 17>>,
        network: :main,
        version_number: <<4, 136, 173, 228>>
      }

      iex> child_address = master
      ...> |> BSV.Extended.Children.derive("m/44'/0'/0'/0/0")
      ...> |> BSV.Address.to_string
      "1F6fuP7HrBY8aeUazXZitaAsgpsJQFfUun"

  ### Creating transactions

  For further details and examples refer to `BSV.Transaction`,
  `BSV.Transaction.Input`, `BSV.Transaction.Output` and `BSV.Transaction.Script`.

      iex> script = %BSV.Transaction.Script{}
      ...> |> BSV.Transaction.Script.push(:OP_FALSE)
      ...> |> BSV.Transaction.Script.push(:OP_RETURN)
      ...> |> BSV.Transaction.Script.push("hello world")
      %BSV.Transaction.Script{chunks: [:OP_FALSE, :OP_RETURN, "hello world"]}

      iex> output = %BSV.Transaction.Output{script: script}
      %BSV.Transaction.Output{
        amount: 0,
        satoshis: 0,
        script: %BSV.Transaction.Script{
          chunks: [:OP_FALSE, :OP_RETURN, "hello world"]
        }
      }

      iex> tx = %BSV.Transaction{outputs: [output]}
      ...> |> BSV.Transaction.serialize(encoding: :hex)
      "01000000000100000000000000000e006a0b68656c6c6f20776f726c6400000000"
  """
end