# Changelog - 0.4.0 (2025-06-21) * Scalar multiplication, signing, verifying, and ECHD functions are now all total, returning 'Nothing' when supplied with invalid inputs. * Adds a group element check to 'mul_wnaf'. - 0.3.0 (2025-03-14) * Adds 'ecdh' for computing ECDH secrets, any given secret being the SHA256 hash of the x-coordinate of the appropriate secp256k1 point. - 0.2.2 (2025-02-16) * Exports the secp256k1 "point at infinity" as _CURVE_ZERO. - 0.2.1 (2024-12-18) * Adds 'serialize_point' for compressed-format serialization of secp256k1 points. - 0.2.0 (2024-11-08) * Adds wNAF ("w-ary non-adjacent form") scalar multiplication, as well as fast 'sign' and 'verify' variants for Schnorr and ECDSA (disambiguated by a trailing apostrophe) that make use of it. Each wNAF-powered function requires a 'Context' consisting of precomputed secp256k1 generator multiples; one can be gotten via 'precompute'. Note that the non-wNAF-powered sign and verify functions have incurred a slight performance decrease (on the order of tens to hundreds of microseconds) as a result. * Adds 'parse_sig' for parsing compact signatures. * Adds a dependency on the 'primitive' library (already transitively required via 'ppad-hmac-drbg'). - 0.1.0 (2024-10-19) * Initial release, supporting public key derivation and Schnorr & ECDSA signatures on secp256k1.