Pure Rust implementation of Curve Finance AMM math.

Exact on-chain match — no tolerances, no approximations, wei-level precision. Differentially fuzz-tested against on-chain get_dy for 200+ pools.

Architecture

• core — stateless math functions (Newton solvers, Cardano cubic, fee). Always available, zero dependencies beyond alloy-primitives.
• swap + Pool — pool simulation with normalization, fees, and denormalization. Requires the swap feature.

Quick start

use curve_math::Pool; // requires feature "swap"
use alloy_primitives::U256;

let pool = Pool::StableSwapV2 {
    balances: vec![U256::from(1_000_000_000_000_000_000_000u128),
                   U256::from(1_000_000_000_000_000_000_000u128)],
    rates: vec![U256::from(1_000_000_000_000_000_000u128),
                U256::from(1_000_000_000_000_000_000u128)],
    amp: U256::from(40_000u64),    // A * A_PRECISION (400 * 100)
    fee: U256::from(4_000_000u64), // 0.04%
};

let dx = U256::from(1_000_000_000_000_000_000u128); // 1 token
let dy = pool.get_amount_out(0, 1, dx).expect("swap should succeed");
assert!(dy > U256::ZERO);

Supported variants

All 11 Curve pool types: StableSwapV0, StableSwapV1, StableSwapV2, StableSwapALend, StableSwapNG, StableSwapMeta, TwoCryptoV1, TwoCryptoNG, TwoCryptoStable, TriCryptoV1, TriCryptoNG.