From 9fb07dc4aeeeae6d62acf9f678092fada144517b Mon Sep 17 00:00:00 2001
From: Tim Tickel <twt@clarified.io>
Date: Fri, 24 Jan 2025 17:22:14 -0800
Subject: [PATCH] implement `Packable` for ContractClassId

---
 .../crates/types/src/contract_class_id.nr           | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/noir-projects/noir-protocol-circuits/crates/types/src/contract_class_id.nr b/noir-projects/noir-protocol-circuits/crates/types/src/contract_class_id.nr
index c70783fd035c..2ff06c1d8e4f 100644
--- a/noir-projects/noir-protocol-circuits/crates/types/src/contract_class_id.nr
+++ b/noir-projects/noir-protocol-circuits/crates/types/src/contract_class_id.nr
@@ -1,5 +1,5 @@
 use crate::constants::GENERATOR_INDEX__CONTRACT_LEAF;
-use crate::traits::{Deserialize, FromField, Serialize, ToField};
+use crate::traits::{Deserialize, FromField, Packable, Serialize, ToField};
 
 pub struct ContractClassId {
     pub inner: Field,
@@ -35,6 +35,17 @@ impl Deserialize<1> for ContractClassId {
     }
 }
 
+// Implement the Packable trait so ContractClassId can be stored in contract's storage.
+impl Packable<1> for ContractClassId {
+    fn pack(self) -> [Field; 1] {
+        self.serialize()
+    }
+
+    fn unpack(fields: [Field; 1]) -> Self {
+        Self::deserialize(fields)
+    }
+}
+
 impl ContractClassId {
     pub fn compute(
         artifact_hash: Field,