fix: #171

bin/node/runtime/build.rs

@@ -1,22 +1,21 @@
-// Copyright 2019 Parity Technologies (UK) Ltd.
-// This file is part of Substrate.
-
-// Substrate 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.
-
-// Substrate 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 Substrate.  If not, see <http://www.gnu.org/licenses/>.
+use std::{
+	env, fs,
+	path::Path,
+	time::{SystemTime, UNIX_EPOCH},
+};
 
 use wasm_builder_runner::{build_current_project_with_rustflags, WasmBuilderSource};
 
 fn main() {
+	fs::write(
+		&Path::new(&env::var_os("OUT_DIR").unwrap()).join("timestamp_now.rs"),
+		&format!(
+			"pub const NOW: u64 = {};",
+			SystemTime::now().duration_since(UNIX_EPOCH).unwrap().as_millis() as u64,
+		),
+	)
+	.unwrap();
+
 	build_current_project_with_rustflags(
 		"wasm_binary.rs",
 		// TODO: update version

bin/node/runtime/src/constants.rs

@@ -31,11 +31,8 @@ pub mod time {
 	use node_primitives::{BlockNumber, Moment};
 	use sp_staking::SessionIndex;
 
-	/// Date in Los Angeles*: 19/02/2020, 03:30:00
-	/// Date in Berlin* :19/02/2020, 18:30:00
-	/// Date in Beijing*: 19/02/2020, 17:30:00
-	/// Date in New York* :19/02/2020, 05:30:00
-	pub const GENESIS_TIME: Moment = 1_582_108_200_000;
+	include!(concat!(env!("OUT_DIR"), "/timestamp_now.rs"));
+	pub const GENESIS_TIME: Moment = NOW;
 
 	/// Since BABE is probabilistic this is the average expected block time that
 	/// we are targetting. Blocks will be produced at a minimum duration defined