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bitcoinlib

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Generate private/public keys and addresses for the bitcoin network

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bitcoinlib lib key public_hash.ex
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lib/key/public_hash.ex 

defmodule BitcoinLib.Key.PublicHash do

  @moduledoc """

  Bitcoin Public Key Hash module

  """



  alias BitcoinLib.Crypto



  @doc """

  Extract a public key hash from a bitcoin public key



  Inspired by https://learnmeabitcoin.com/technical/public-key-hash



  ## Examples

    iex> 0x02b4632d08485ff1df2db55b9dafd23347d1c47a457072a1e87be26896549a8737

    ...> |> BitcoinLib.Key.PublicHash.from_public_key()

    0x93ce48570b55c42c2af816aeaba06cfee1224fae

  """

  @spec from_public_key(integer()) :: integer()

  def from_public_key(public_key) do

    public_key

    |> Binary.from_integer()

    |> Crypto.hash160_bitstring()

    |> Binary.to_integer()

  end

end