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lib_secp256k1

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Library wrapping around secp256k1 Bitcoin library

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lib_secp256k1 lib secp256k1 guards.ex
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lib/secp256k1/guards.ex 

defmodule Secp256k1.Guards do

  @moduledoc false



  defguard is_bin_size(data, size) when is_binary(data) and byte_size(data) == size



  defguard is_hash(data) when is_bin_size(data, 32)



  # seckey

  defguard is_seckey(seckey) when is_bin_size(seckey, 32)



  # pubkey

  defguard is_compressed_pubkey(pubkey) when is_bin_size(pubkey, 33)

  defguard is_uncompressed_pubkey(pubkey) when is_bin_size(pubkey, 65)

  defguard is_xonly_pubkey(pubkey) when is_bin_size(pubkey, 32)



  defguard is_pubkey(pubkey)

           when is_compressed_pubkey(pubkey) or is_uncompressed_pubkey(pubkey) or

                  is_xonly_pubkey(pubkey)



  # signature

  defguard is_ecdsa_sig(sig) when is_bin_size(sig, 64)

  defguard is_schnorr_sig(sig) when is_bin_size(sig, 64)

end