secp256k1

Pure Haskell Schnorr, ECDSA on the elliptic curve secp256k1 (docs.ppad.tech/secp256k1).
git clone git://git.ppad.tech/secp256k1.git
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CHANGELOG (1215B)

      1 # Changelog
      2 
      3 - 0.3.0 (2025-03-14)
      4   * Adds 'ecdh' for computing ECDH secrets, any given secret being the
      5     SHA256 hash of the x-coordinate of the appropriate secp256k1 point.
      6 
      7 - 0.2.2 (2025-02-16)
      8   * Exports the secp256k1 "point at infinity" as _CURVE_ZERO.
      9 
     10 - 0.2.1 (2024-12-18)
     11   * Adds 'serialize_point' for compressed-format serialization of
     12     secp256k1 points.
     13 
     14 - 0.2.0 (2024-11-08)
     15   * Adds wNAF ("w-ary non-adjacent form") scalar multiplication, as
     16     well as fast 'sign' and 'verify' variants for Schnorr and ECDSA
     17     (disambiguated by a trailing apostrophe) that make use of it.
     18 
     19     Each wNAF-powered function requires a 'Context' consisting of
     20     precomputed secp256k1 generator multiples; one can be gotten via
     21     'precompute'.
     22 
     23     Note that the non-wNAF-powered sign and verify functions have
     24     incurred a slight performance decrease (on the order of tens to
     25     hundreds of microseconds) as a result.
     26 
     27   * Adds 'parse_sig' for parsing compact signatures.
     28 
     29   * Adds a dependency on the 'primitive' library (already transitively required
     30     via 'ppad-hmac-drbg').
     31 
     32 - 0.1.0 (2024-10-19)
     33   * Initial release, supporting public key derivation and Schnorr &
     34     ECDSA signatures on secp256k1.
     35