1use algebra::bytes::ToBytes;
 2use rand::Rng;
 3use std::hash::Hash;
 4
 5pub mod injective_map;
 6pub mod pedersen;
 7
 8use crate::Error;
 9
10#[cfg(feature = "r1cs")]
11pub mod constraints;
12#[cfg(feature = "r1cs")]
13pub use constraints::*;
14
15pub trait FixedLengthCRH {
16    const INPUT_SIZE_BITS: usize;
17    type Output: ToBytes + Clone + Eq + Hash + Default;
18    type Parameters: Clone + Default;
19
20    fn setup<R: Rng>(r: &mut R) -> Result<Self::Parameters, Error>;
21    fn evaluate(parameters: &Self::Parameters, input: &[u8]) -> Result<Self::Output, Error>;
22}