1use algebra_core::Field;
 2use core::fmt::Debug;
 3
 4use crate::{prf::PRF, Vec};
 5use r1cs_core::{ConstraintSystemRef, SynthesisError};
 6
 7use r1cs_std::prelude::*;
 8
 9pub trait PRFGadget<P: PRF, F: Field> {
10    type OutputVar: EqGadget<F>
11        + ToBytesGadget<F>
12        + AllocVar<P::Output, F>
13        + R1CSVar<F, Value = P::Output>
14        + Clone
15        + Debug;
16
17    fn new_seed(cs: ConstraintSystemRef<F>, seed: &P::Seed) -> Vec<UInt8<F>>;
18
19    fn evaluate(seed: &[UInt8<F>], input: &[UInt8<F>]) -> Result<Self::OutputVar, SynthesisError>;
20}