Function storage_proofs::circuit::kdf::kdf

pub fn kdf<E, CS>(
    cs: CS, 
    id: Vec<Boolean>, 
    parents: Vec<Vec<Boolean>>, 
    m: usize
) -> Result<AllocatedNum<E>, SynthesisError> where
    E: JubjubEngine,
    CS: ConstraintSystem<E>, 

Key derivation function, using pedersen hashes as the underlying primitive.