Coincurve: secp256k1 Elliptic Curve Operations

Coincurve is a Python library providing fast and secure bindings for libsecp256k1, the highly optimized C library used by Bitcoin Core for elliptic curve cryptography operations. It offers a clean, easy-to-use API for tasks like key generation, signing, and verification. The current version is 21.0.0, and it maintains frequent updates to libsecp256k1.