Assign unique storage names to pallets. (#5010)

* Assign unique storage names to pallets.

* Bump spec

* Upgrade logic for finality tracker (untested)

* Logic for migrating Identity (untested)

* Logic for migrating transaction-payment

* Fix tests

* Fix `decl_storage` build

* Contract -> Contracts

* Update Cargo.lock

* bump spec

* update migration

* Fix merge error

* Migration for contracts

* Remove serde

* Remove some illegal spaces and Options

* Fix types in identity.

* Minor variable rename

Co-authored-by: Gavin Wood <gavin@parity.io>

substrate/frame/finality-tracker/src/lib.rs

@@ -26,6 +26,8 @@ use frame_support::traits::Get;
 use frame_system::{ensure_none, Trait as SystemTrait};
 use sp_finality_tracker::{INHERENT_IDENTIFIER, FinalizedInherentData};
 
+mod migration;
+
 pub const DEFAULT_WINDOW_SIZE: u32 = 101;
 pub const DEFAULT_REPORT_LATENCY: u32 = 1000;
 
@@ -40,7 +42,7 @@ pub trait Trait: SystemTrait {
 }
 
 decl_storage! {
-	trait Store for Module<T: Trait> as Timestamp {
+	trait Store for Module<T: Trait> as FinalityTracker {
 		/// Recent hints.
 		RecentHints get(fn recent_hints) build(|_| vec![T::BlockNumber::zero()]): Vec<T::BlockNumber>;
 		/// Ordered recent hints.
@@ -89,6 +91,10 @@ decl_module! {
 		fn on_finalize() {
 			Self::update_hint(<Self as Store>::Update::take())
 		}
+
+		fn on_runtime_upgrade() {
+			migration::on_runtime_upgrade::<T>()
+		}
 	}
 }
 

substrate/frame/finality-tracker/src/migration.rs

@@ -0,0 +1,54 @@
+// Copyright 2020 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/>.
+
+// Migration code to update storage.
+
+use super::*;
+use frame_support::storage::migration::{put_storage_value, take_storage_value};
+
+pub fn on_runtime_upgrade<T: Trait>() {
+	change_name_timestamp_to_finality_tracker::<T>()
+}
+
+// Change the storage name used by this pallet from `Timestamp` to `FinalityTracker`.
+//
+// Since the format of the storage items themselves have not changed, we do not
+// need to keep track of a storage version. If the runtime does not need to be
+// upgraded, nothing here will happen anyway.
+
+fn change_name_timestamp_to_finality_tracker<T:Trait>() {
+	sp_runtime::print("Migrating Finality Tracker.");
+
+	if let Some(recent_hints) = take_storage_value::<Vec<T::BlockNumber>>(b"Timestamp", b"RecentHints", &[]) {
+		put_storage_value(b"FinalityTracker", b"RecentHints", &[], recent_hints);
+	}
+
+	if let Some(ordered_hints) = take_storage_value::<Vec<T::BlockNumber>>(b"Timestamp", b"OrderedHints", &[]) {
+		put_storage_value(b"FinalityTracker", b"OrderedHints", &[], ordered_hints);
+	}
+
+	if let Some(median) = take_storage_value::<T::BlockNumber>(b"Timestamp", b"Median", &[]) {
+		put_storage_value(b"FinalityTracker", b"Median", &[], median);
+	}
+
+	if let Some(update) = take_storage_value::<T::BlockNumber>(b"Timestamp", b"Update", &[]) {
+		put_storage_value(b"FinalityTracker", b"Update", &[], update);
+	}
+
+	if let Some(initialized) = take_storage_value::<bool>(b"Timestamp", b"Initialized", &[]) {
+		put_storage_value(b"FinalityTracker", b"Initialized", &[], initialized);
+	}
+}