Bitcoinex.Secp256k1 (bitcoinex v0.1.6) View Source

ECDSA Secp256k1 curve operations. libsecp256k1: https://github.com/bitcoin-core/secp256k1

Currently supports ECDSA public key recovery.

In the future, we will NIF for critical operations. However, it is more portable to have a native elixir version.

Link to this section Summary

ecdsa_recover_compact does ECDSA public key recovery.

Returns the y-coordinate of a secp256k1 curve point (P) using the x-coordinate. To get P(y), we solve for y in this equation: y^2 = x^3 + 7.

verify_point verifies that a given point is on the secp256k1 curve

verify whether the signature is valid for the given message hash and public key

ecdsa_recover_compact(binary(), binary(), integer()) ::
  {:ok, binary()} | {:error, String.t()}

ecdsa_recover_compact does ECDSA public key recovery.

get_y(integer(), boolean()) :: {:ok, integer()} | {:error, String.t()}

Returns the y-coordinate of a secp256k1 curve point (P) using the x-coordinate. To get P(y), we solve for y in this equation: y^2 = x^3 + 7.

verify_point(Bitcoinex.Secp256k1.Point.t()) :: bool()

verify_point verifies that a given point is on the secp256k1 curve

verify_signature(
  Bitcoinex.Secp256k1.Point.t(),
  integer(),
  Bitcoinex.Secp256k1.Signature.t()
) :: boolean()

verify whether the signature is valid for the given message hash and public key