Feat: Add status route

src/server/mod.rs

@@ -54,6 +54,7 @@ where
                 .app_data(Data::new(runtime_context.clone()))
                 .wrap(Logger::default())
                 .route("/", web::get().to(index::<Context, KeyManager>))
+                .route("/status", web::get().to(index::<Context, KeyManager>))
                 .route("/tx/{tx_id}", web::get().to(get_tx::<Context>))
                 .service(
                     web::scope("/cosigner")

src/server/routes/mod.rs

@@ -2,3 +2,4 @@ pub mod get_tx;
 pub mod index;
 pub mod sign;
 pub mod test;
+pub mod status;

src/server/routes/status.rs

@@ -0,0 +1,44 @@
+use actix_web::{
+    web::Data,
+    HttpResponse,
+};
+use diesel::{QueryDsl, RunQueryDsl};
+use diesel::dsl::count;
+use serde::Serialize;
+
+use crate::database::schema::transactions::{self, id};
+use crate::server::RuntimeContext;
+use crate::{server::error::ValidatorServerError, key_manager};
+use crate::server::routes::sign::Config;
+
+#[derive(Serialize)]
+struct StatusBody {
+    total_txs: i64,
+    epoch: u128,
+    next_epoch: u128,
+    previous_epoch: u128
+}
+
+pub async fn index<Context, KeyManager>(
+    ctx: Data<Context>,
+) -> actix_web::Result<HttpResponse, ValidatorServerError>
+where
+    Context: self::Config<KeyManager> + RuntimeContext,
+    KeyManager: key_manager::KeyManager,
+{
+    let conn = ctx.get_db_connection();
+    let total_txs = transactions::table
+        .select(count(id))
+        .first(&conn)
+        .unwrap_or(0 as i64);
+    let current_epoch = ctx.current_epoch();
+
+    let body = StatusBody {
+        total_txs,
+        epoch: current_epoch,
+        next_epoch: current_epoch + 1,
+        previous_epoch: current_epoch - 1
+    };
+
+    Ok(HttpResponse::Ok().json(body))
+}