1use algebra::Field;
 2use std::fmt::Debug;
 3
 4use crate::prf::PRF;
 5use r1cs_core::{ConstraintSystem, SynthesisError};
 6
 7use r1cs_std::prelude::*;
 8
 9pub trait PRFGadget<P: PRF, ConstraintF: Field> {
10    type OutputGadget: EqGadget<ConstraintF>
11        + ToBytesGadget<ConstraintF>
12        + AllocGadget<P::Output, ConstraintF>
13        + Clone
14        + Debug;
15
16    fn new_seed<CS: ConstraintSystem<ConstraintF>>(cs: CS, output: &P::Seed) -> Vec<UInt8>;
17
18    fn check_evaluation_gadget<CS: ConstraintSystem<ConstraintF>>(
19        cs: CS,
20        seed: &[UInt8],
21        input: &[UInt8],
22    ) -> Result<Self::OutputGadget, SynthesisError>;
23}