sigma-compiler/tests/subtract.rs

#![allow(non_snake_case)]
use curve25519_dalek::ristretto::RistrettoPoint as G;
use group::Group;
use sha2::Sha512;
use sigma_compiler::*;

#[test]
fn subtract_test() -> Result<(), sigma_rs::errors::Error> {
    sigma_compiler! { proof,
        (x),
        (C, const cind B),
        C = (x-1)*B,
    }

    type Scalar = <G as Group>::Scalar;
    let mut rng = rand::thread_rng();
    let B = G::generator();
    let x = Scalar::random(&mut rng);
    let C = (x-Scalar::ONE)*B;

    let instance = proof::Instance { C, B };
    let witness = proof::Witness { x };

    let proof = proof::prove(&instance, &witness, b"subtract_test", &mut rng)?;
    proof::verify(&instance, &proof, b"subtract_test")
}