$ account mratsim
Constantine is a high-performance modular cryptography library implemented in Nim, with bindings for C, Rust, and Go. It provides production-grade implementations of elliptic curve arithmetic, pairings, BLS signatures, KZG polynomial commitments, and Ethereum-specific protocols (EIP-2537, EIP-4844, EIP-7594). The library is designed with constant-time operations to resist side-channel attacks, includes a custom lock-free work-stealing threadpool for parallel execution, and features hand-optimized assembly for x86 (ADX, BMI2) and ARM64. It also contains experimental GPU code generation (CUDA, AMD ROCm) via LLVM IR. The codebase is extensively tested against GMP, OpenSSL, and official Ethereum test vectors, and includes formal verification of field arithmetic via fiat-crypto. Despite its research components (Sage scripts, optimization papers), the dominant character is a reusable, production-oriented library for blockchain and zero-knowledge proof systems.