use algebra::bytes::ToBytes;
use core::hash::Hash;
use rand::Rng;

pub mod bowe_hopwood;
pub mod injective_map;
pub mod pedersen;

use crate::Error;

#[cfg(feature = "r1cs")]
pub mod constraints;
#[cfg(feature = "r1cs")]
pub use constraints::*;

pub trait FixedLengthCRH {
    const INPUT_SIZE_BITS: usize;
    type Output: ToBytes + Clone + Eq + Hash + Default;
    type Parameters: Clone + Default;

    fn setup<R: Rng>(r: &mut R) -> Result<Self::Parameters, Error>;
    fn evaluate(parameters: &Self::Parameters, input: &[u8]) -> Result<Self::Output, Error>;
}