From 9e778fad9c334ff2fd5c34b1a348a3590518046d Mon Sep 17 00:00:00 2001
From: Marvin Jones <jonesmc8@gmail.com>
Date: Mon, 15 Jun 2026 12:00:19 -0400
Subject: [PATCH] address issue 514

---
 Cargo.toml                             | 1 +
 lee/state_machine/src/signature/mod.rs | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/Cargo.toml b/Cargo.toml
index ae2f05d7..6f30b095 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -157,6 +157,7 @@ k256 = { version = "0.13.3", features = [
   "expose-field",
   "serde",
   "pem",
+  "schnorr",
 ] }
 ml-kem = { version = "0.3", features = ["hazmat"] }
 elliptic-curve = { version = "0.13.8", features = ["arithmetic"] }
diff --git a/lee/state_machine/src/signature/mod.rs b/lee/state_machine/src/signature/mod.rs
index a46b1ff5..2b6732c3 100644
--- a/lee/state_machine/src/signature/mod.rs
+++ b/lee/state_machine/src/signature/mod.rs
@@ -1,6 +1,7 @@
 use std::str::FromStr;
 
 use borsh::{BorshDeserialize, BorshSerialize};
+use k256::ecdsa::signature::hazmat::PrehashVerifier;
 pub use private_key::PrivateKey;
 pub use public_key::PublicKey;
 use rand::{RngCore as _, rngs::OsRng};
@@ -72,7 +73,7 @@ impl Signature {
             return false;
         };
 
-        pk.verify_raw(bytes, &sig).is_ok()
+        pk.verify_prehash(bytes, &sig).is_ok()
     }
 }