add simple ready entrypoint (#54)

Cargo.toml

@@ -18,6 +18,7 @@ halo2curves.workspace = true
 bytes.workspace = true
 tokio.workspace = true
 warp.workspace = true
+chrono.workspace = true
 
 [[bin]]
 name = "expander-exec"
@@ -29,17 +30,15 @@ default = []
 grinding = []
 
 [workspace]
-members = [
-    "arith",
-    "bi-kzg"
-]
+members = ["arith", "bi-kzg"]
 
 [workspace.dependencies]
 ark-std = "0.4"
 ark-bn254 = "0.4.0"
 ark-ec = "0.4.0"
 ark-ff = { version = "0.4" }
 bytes = "1.6.0"
+chrono = "0.4.38"
 clap = { version = "4.1", features = ["derive"] }
 criterion = { version = "0.5", features = ["html_reports"] }
 env_logger = "0.11.3"
@@ -54,4 +53,3 @@ sha2 = "0.10.8"
 tokio = { version = "1.38.0", features = ["full"] }
 tynm = { version = "0.1.6", default-features = false }
 warp = "0.3.7"
-

src/exec.rs

@@ -91,7 +91,11 @@ async fn run_command<C: GKRConfig>(
             let circuit_clone_for_verifier = circuit.clone();
             let prover = Arc::new(Mutex::new(prover));
             let verifier = Arc::new(Mutex::new(verifier));
-
+            let ready_time = chrono::offset::Utc::now();
+            let ready = warp::path("ready").map(move || {
+                info!("Received ready request.");
+                reply::with_status(format!("Ready since {:?}", ready_time), StatusCode::OK)
+            });
             let prove =
                 warp::path("prove")
                     .and(warp::body::bytes())
@@ -141,9 +145,13 @@ async fn run_command<C: GKRConfig>(
                             }
                         }
                     });
-            warp::serve(warp::post().and(prove.or(verify)))
-                .run((host, port))
-                .await;
+            warp::serve(
+                warp::post()
+                    .and(prove.or(verify))
+                    .or(warp::get().and(ready)),
+            )
+            .run((host, port))
+            .await;
         }
         _ => {
             println!("Invalid command.");