Implement the basic structure of the beacon node.

beacon_node/rpc/src/lib.rs

@@ -0,0 +1,36 @@
+mod beacon_block;
+mod validator;
+
+use self::beacon_block::BeaconBlockServiceInstance;
+use self::validator::ValidatorServiceInstance;
+use grpcio::{Environment, Server, ServerBuilder};
+use protos::services_grpc::{create_beacon_block_service, create_validator_service};
+use std::sync::Arc;
+
+use slog::{info, Logger};
+
+pub fn start_server(log: Logger) -> Server {
+    let log_clone = log.clone();
+    let env = Arc::new(Environment::new(1));
+
+    let beacon_block_service = {
+        let instance = BeaconBlockServiceInstance { log: log.clone() };
+        create_beacon_block_service(instance)
+    };
+    let validator_service = {
+        let instance = ValidatorServiceInstance { log: log.clone() };
+        create_validator_service(instance)
+    };
+
+    let mut server = ServerBuilder::new(env)
+        .register_service(beacon_block_service)
+        .register_service(validator_service)
+        .bind("127.0.0.1", 50_051)
+        .build()
+        .unwrap();
+    server.start();
+    for &(ref host, port) in server.bind_addrs() {
+        info!(log_clone, "gRPC listening on {}:{}", host, port);
+    }
+    server
+}