1use crate::CommitmentScheme;
 2use algebra::Field;
 3use core::fmt::Debug;
 4use r1cs_core::{ConstraintSystem, SynthesisError};
 5use r1cs_std::prelude::*;
 6
 7pub trait CommitmentGadget<C: CommitmentScheme, ConstraintF: Field> {
 8    type OutputGadget: EqGadget<ConstraintF>
 9        + ToBytesGadget<ConstraintF>
10        + AllocGadget<C::Output, ConstraintF>
11        + Clone
12        + Sized
13        + Debug;
14    type ParametersGadget: AllocGadget<C::Parameters, ConstraintF> + Clone;
15    type RandomnessGadget: AllocGadget<C::Randomness, ConstraintF> + Clone;
16
17    fn check_commitment_gadget<CS: ConstraintSystem<ConstraintF>>(
18        cs: CS,
19        parameters: &Self::ParametersGadget,
20        input: &[UInt8],
21        r: &Self::RandomnessGadget,
22    ) -> Result<Self::OutputGadget, SynthesisError>;
23}