feat(serve): add gRPC reflection (#147)

Cargo.toml

@@ -37,15 +37,17 @@ bincode = "1.3.3"
 miette = { version = "5.9.0", features = ["fancy"] }
 tokio = { version = "1.28.2", features = ["rt", "rt-multi-thread"] }
 async-trait = "0.1.68"
-tonic = { version = "0.9.2", features = ["tls"] }
+tonic = { version = "^0.9", features = ["tls"] }
+tonic-web = "^0.9"
+tonic-reflection = "^0.9"
 bytes = "1.4.0"
 futures-core = "0.3.28"
-tonic-web = "0.9.2"
 tokio-stream = { version = "0.1.14", features = ["sync"] }
 futures-util = "0.3.28"
 async-stream = "0.3.5"
 serde_with = "3.4.0"
 mithril-client = { version = "0.5.7", optional = true }
+protoc-wkt = "1.0.0"
 
 [dev-dependencies]
 tempfile = "3.3.0"

src/serve/grpc/mod.rs

@@ -22,6 +22,13 @@ pub async fn serve(config: Config, wal: wal::Store, chain: chain::Store) -> Resu
     let service = sync::ChainSyncServiceImpl::new(wal, chain);
     let service = ChainSyncServiceServer::new(service);
 
+    let reflection = tonic_reflection::server::Builder::configure()
+        .register_encoded_file_descriptor_set(utxorpc::proto::cardano::v1::FILE_DESCRIPTOR_SET)
+        .register_encoded_file_descriptor_set(utxorpc::proto::sync::v1::FILE_DESCRIPTOR_SET)
+        .register_encoded_file_descriptor_set(protoc_wkt::google::protobuf::FILE_DESCRIPTOR_SET)
+        .build()
+        .unwrap();
+
     let mut server = Server::builder().accept_http1(true);
 
     if let Some(pem) = config.tls_client_ca_root {
@@ -39,6 +46,7 @@ pub async fn serve(config: Config, wal: wal::Store, chain: chain::Store) -> Resu
     server
         // GrpcWeb is over http1 so we must enable it.
         .add_service(tonic_web::enable(service))
+        .add_service(reflection)
         .serve(addr)
         .await
         .map_err(Error::server)?;