defmodule Utils do
  def to_bin(string) do
    string |> Base.decode16()
  end

  def to_hex(binary) do
    binary |> Base.encode16() |> String.downcase()
  end

  def reverse(binary) do
    binary |> :binary.bin_to_list() |> Enum.reverse() |> :binary.list_to_bin()
  end

  def sha256(binary) do
    :crypto.hash(:sha256, binary)
  end

  def hash(binary) do
    binary |> sha256 |> sha256 |> reverse
  end
end