From 978332c73424a361310cd78a9b7857c8872db4c7 Mon Sep 17 00:00:00 2001
From: phrwlk <phrwlk7@gmail.com>
Date: Sat, 8 Nov 2025 17:01:52 +0200
Subject: [PATCH] Update ERC7913P256Verifier.sol

---
 .../utils/cryptography/verifiers/ERC7913P256Verifier.sol     | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/contracts/utils/cryptography/verifiers/ERC7913P256Verifier.sol b/contracts/utils/cryptography/verifiers/ERC7913P256Verifier.sol
index bd37d64258e..3ef7f800f84 100644
--- a/contracts/utils/cryptography/verifiers/ERC7913P256Verifier.sol
+++ b/contracts/utils/cryptography/verifiers/ERC7913P256Verifier.sol
@@ -9,6 +9,11 @@ import {IERC7913SignatureVerifier} from "../../../interfaces/IERC7913.sol";
 /**
  * @dev ERC-7913 signature verifier that support P256 (secp256r1) keys.
  *
+ * Key format:
+ * - The `key` MUST be a 64-byte concatenation of the P256 public key coordinates `qx || qy`.
+ * - Each coordinate is a 32-byte big-endian value (`bytes32`).
+ * - SEC1 prefixes are not accepted and compressed keys are not supported.
+ *
  * @custom:stateless
  */
 contract ERC7913P256Verifier is IERC7913SignatureVerifier {