From 7feece1ff888080efac79e868cf16c03b8d8a688 Mon Sep 17 00:00:00 2001
From: Mateusz Chudkowski <mateuszchudy03@gmail.com>
Date: Mon, 9 Sep 2024 22:53:16 +0200
Subject: [PATCH] pub key as prefix hex

---
 prover-sdk/src/sdk_builder.rs | 2 +-
 prover/src/auth/nonce.rs      | 5 ++++-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/prover-sdk/src/sdk_builder.rs b/prover-sdk/src/sdk_builder.rs
index b5e3db4..0df8a39 100644
--- a/prover-sdk/src/sdk_builder.rs
+++ b/prover-sdk/src/sdk_builder.rs
@@ -31,7 +31,7 @@ impl ProverSDKBuilder {
     }
     pub async fn get_nonce(&self, public_key: &VerifyingKey) -> Result<String, SdkErrors> {
         let nonce_req = GenerateNonceRequest {
-            public_key: serde_json::to_string(&public_key)?,
+            public_key: prefix_hex::encode(public_key.to_bytes()),
         };
         let response = self
             .client
diff --git a/prover/src/auth/nonce.rs b/prover/src/auth/nonce.rs
index 89a93ac..9526136 100644
--- a/prover/src/auth/nonce.rs
+++ b/prover/src/auth/nonce.rs
@@ -1,4 +1,5 @@
 use super::authorizer::AuthorizationProvider;
+use crate::auth::auth_errors::AuthorizerError;
 use crate::server::AppState;
 use crate::{auth::auth_errors::AuthError, errors::ProverError};
 use axum::{
@@ -60,7 +61,9 @@ pub async fn generate_nonce(
     State(state): State<AppState>,
     Query(params): Query<GenerateNonceRequest>,
 ) -> Result<Json<GenerateNonceResponse>, ProverError> {
-    let key: VerifyingKey = serde_json::from_str(&params.public_key)?;
+    let verifying_key_bytes = prefix_hex::decode::<Vec<u8>>(params.public_key)
+        .map_err(|e| AuthorizerError::PrefixHexConversionError(e.to_string()))?;
+    let key = VerifyingKey::from_bytes(&verifying_key_bytes.try_into()?)?;
     if !state.authorizer.is_authorized(key).await? {
         return Err(ProverError::Auth(AuthError::Unauthorized));
     }