Make basic collation working

cumulus/test/parachain/src/main.rs

@@ -1,8 +1,26 @@
-//! Substrate Node Template CLI library.
+// Copyright 2019 Parity Technologies (UK) Ltd.
+// This file is part of Cumulus.
+
+// Cumulus is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Cumulus is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Cumulus.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Cumulus test parachain collator
 
 #![warn(missing_docs)]
 #![warn(unused_extern_crates)]
 
+use polkadot_primitives::parachain::Id as ParaId;
+
 mod chain_spec;
 #[macro_use]
 mod service;
@@ -10,6 +28,9 @@ mod cli;
 
 pub use substrate_cli::{VersionInfo, IntoExit, error};
 
+/// The parachain id of this parachain.
+pub const PARA_ID: ParaId = ParaId::new(100);
+
 fn main() -> Result<(), cli::error::Error> {
 	let version = VersionInfo {
 		name: "Cumulus Test Parachain Collator",