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Generate private/public keys and addresses for the bitcoin network

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bitcoinlib lib key hd derivation_path parser purpose.ex
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lib/key/hd/derivation_path/parser/purpose.ex 

defmodule BitcoinLib.Key.HD.DerivationPath.Parser.Purpose do

  # https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki#purpose

  @bip44_purpose 44

  @bip44_atom :bip44



  # https://github.com/bitcoin/bips/blob/master/bip-0049.mediawiki#public-key-derivation

  @bip49_purpose 49

  @bip49_atom :bip49



  # https://github.com/bitcoin/bips/blob/master/bip-0084.mediawiki#public-key-derivation

  @bip84_purpose 84

  @bip84_atom :bip84



  @invalid_atom :invalid



  @doc """

  Converts an bip integer into an atom representing the purpose



  ## Examples

    iex> BitcoinLib.Key.HD.DerivationPath.Parser.Purpose.parse(44)

    :bip44

  """

  @spec parse(integer()) :: :bip44 | :bip49 | :bip84 | :invalid

  def parse(purpose) when is_integer(purpose) do

    case purpose do

      @bip44_purpose -> @bip44_atom

      @bip49_purpose -> @bip49_atom

      @bip84_purpose -> @bip84_atom

      _ -> @invalid_atom

    end

  end

end