Add dusk_bytes::Serializable for poseidon_merkle::Item<()>

poseidon-merkle/CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- Implement `dusk_bytes::Serializable` for `Item<()>`
+
 ## [0.6.0] - 2024-05-22
 
 ### Changed

poseidon-merkle/Cargo.toml

@@ -15,6 +15,7 @@ edition = "2021"
 license = "MPL-2.0"
 
 [dependencies]
+dusk-bytes = "0.1"
 dusk-merkle = "0.5"
 dusk-poseidon = "0.39"
 dusk-bls12_381 = { version = "0.13", default-features = false }
@@ -38,7 +39,7 @@ rkyv-impl = [
     "rkyv",
     "bytecheck",
     "dusk-bls12_381/rkyv-impl",
-    "dusk-merkle/rkyv-impl"
+    "dusk-merkle/rkyv-impl",
 ]
 
 [[bench]]

poseidon-merkle/src/lib.rs

@@ -12,6 +12,7 @@
 pub mod zk;
 
 use dusk_bls12_381::BlsScalar;
+use dusk_bytes::Serializable;
 use dusk_merkle::Aggregate;
 use dusk_poseidon::{Domain, Hash};
 
@@ -152,3 +153,21 @@ where
         }
     }
 }
+
+impl Serializable<32> for Item<()> {
+    type Error = <BlsScalar as Serializable<32>>::Error;
+
+    fn from_bytes(buf: &[u8; 32]) -> Result<Self, Self::Error>
+    where
+        Self: Sized,
+    {
+        Ok(Item {
+            hash: <BlsScalar as Serializable<32>>::from_bytes(buf)?,
+            data: (),
+        })
+    }
+
+    fn to_bytes(&self) -> [u8; 32] {
+        self.hash.to_bytes()
+    }
+}