derive CanonicalSerialize and CanonicalDeserialize

Cargo.toml

@@ -8,6 +8,7 @@ edition = "2021"
 [dependencies]
 tiny-keccak = { version = "2.0.2", features = ["keccak"] }
 ark-ff = "0.4.2"
+ark-serialize = { version = "0.4.2", features = ["derive"] }
 
 [dev-dependencies]
 ark-secp256k1 = "0.4.0"

src/lib.rs

@@ -2,8 +2,9 @@ pub mod constants;
 pub mod sponge;
 
 use ark_ff::Field;
+use ark_serialize::{CanonicalDeserialize, CanonicalSerialize};
 
-#[derive(Clone)]
+#[derive(Clone, CanonicalSerialize, CanonicalDeserialize)]
 pub struct PoseidonConstants<F: Field> {
     pub round_keys: Vec<F>,
     pub mds_matrix: Vec<Vec<F>>,
@@ -13,7 +14,7 @@ pub struct PoseidonConstants<F: Field> {
 
 const CAPACITY: usize = 1; // We fix the capacity to be one.
 
-#[derive(Clone)]
+#[derive(Clone, CanonicalDeserialize, CanonicalSerialize)]
 pub struct Poseidon<F: Field, const WIDTH: usize> {
     pub state: [F; WIDTH],
     pub constants: PoseidonConstants<F>,