poseidon377 1.0.0

An instantiation of the Poseidon hash for use with decaf377.
Documentation 
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use ark_relations::r1cs::{ConstraintSystemRef, SynthesisError};
use decaf377::r1cs::FqVar;
use poseidon_permutation::r1cs::InstanceVar;

use crate::Fq;

pub fn hash_1(
    cs: ConstraintSystemRef<Fq>,
    domain_separator: &FqVar,
    value: FqVar,
) -> Result<FqVar, SynthesisError> {
    Ok(InstanceVar::n_to_1_fixed_hash(
        crate::RATE_1_PARAMS.clone(),
        cs.clone(),
        [domain_separator.clone(), value],
    ))
}

pub fn hash_2(
    cs: ConstraintSystemRef<Fq>,
    domain_separator: &FqVar,
    value: (FqVar, FqVar),
) -> Result<FqVar, SynthesisError> {
    Ok(InstanceVar::n_to_1_fixed_hash(
        crate::RATE_2_PARAMS.clone(),
        cs.clone(),
        [domain_separator.clone(), value.0, value.1],
    ))
}

pub fn hash_3(
    cs: ConstraintSystemRef<Fq>,
    domain_separator: &FqVar,
    value: (FqVar, FqVar, FqVar),
) -> Result<FqVar, SynthesisError> {
    Ok(InstanceVar::n_to_1_fixed_hash(
        crate::RATE_3_PARAMS.clone(),
        cs.clone(),
        [domain_separator.clone(), value.0, value.1, value.2],
    ))
}

pub fn hash_4(
    cs: ConstraintSystemRef<Fq>,
    domain_separator: &FqVar,
    value: (FqVar, FqVar, FqVar, FqVar),
) -> Result<FqVar, SynthesisError> {
    Ok(InstanceVar::n_to_1_fixed_hash(
        crate::RATE_4_PARAMS.clone(),
        cs.clone(),
        [domain_separator.clone(), value.0, value.1, value.2, value.3],
    ))
}

pub fn hash_5(
    cs: ConstraintSystemRef<Fq>,
    domain_separator: &FqVar,
    value: (FqVar, FqVar, FqVar, FqVar, FqVar),
) -> Result<FqVar, SynthesisError> {
    Ok(InstanceVar::n_to_1_fixed_hash(
        crate::RATE_5_PARAMS.clone(),
        cs.clone(),
        [
            domain_separator.clone(),
            value.0,
            value.1,
            value.2,
            value.3,
            value.4,
        ],
    ))
}

pub fn hash_6(
    cs: ConstraintSystemRef<Fq>,
    domain_separator: &FqVar,
    value: (FqVar, FqVar, FqVar, FqVar, FqVar, FqVar),
) -> Result<FqVar, SynthesisError> {
    Ok(InstanceVar::n_to_1_fixed_hash(
        crate::RATE_6_PARAMS.clone(),
        cs.clone(),
        [
            domain_separator.clone(),
            value.0,
            value.1,
            value.2,
            value.3,
            value.4,
            value.5,
        ],
    ))
}

pub fn hash_7(
    cs: ConstraintSystemRef<Fq>,
    domain_separator: &FqVar,
    value: (FqVar, FqVar, FqVar, FqVar, FqVar, FqVar, FqVar),
) -> Result<FqVar, SynthesisError> {
    Ok(InstanceVar::n_to_1_fixed_hash(
        crate::RATE_7_PARAMS.clone(),
        cs.clone(),
        [
            domain_separator.clone(),
            value.0,
            value.1,
            value.2,
            value.3,
            value.4,
            value.5,
            value.6,
        ],
    ))
}