Assign unique storage names to pallets.

bin/node-template/pallets/template/src/lib.rs

@@ -28,6 +28,9 @@ pub trait Trait: system::Trait {
 
 // This pallet's storage items.
 decl_storage! {
+	// It is important to update your storage name so that your pallet's
+	// storage items are isolated from other pallets.
+	// ---------------------------------vvvvvvvvvvvvvv
 	trait Store for Module<T: Trait> as TemplateModule {
 		// Just a dummy storage item.
 		// Here we are declaring a StorageValue, `Something` as a Option<u32>

frame/contracts/src/lib.rs

@@ -98,6 +98,7 @@ mod rent;
 
 #[cfg(test)]
 mod tests;
+mod migration;
 
 use crate::exec::ExecutionContext;
 use crate::account_db::{AccountDb, DirectAccountDb};
@@ -666,6 +667,10 @@ decl_module! {
 		fn on_finalize() {
 			GasSpent::kill();
 		}
+
+		fn on_runtime_upgrade() {
+			migration::on_runtime_upgrade::<T>()
+		}
 	}
 }
 
@@ -923,7 +928,7 @@ decl_event! {
 }
 
 decl_storage! {
-	trait Store for Module<T: Trait> as Contract {
+	trait Store for Module<T: Trait> as Contracts {
 		/// Gas spent so far in this block.
 		GasSpent get(fn gas_spent): Gas;
 		/// Current cost schedule for contracts.

frame/contracts/src/migration.rs

@@ -0,0 +1,62 @@
+// 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, StorageIterator};
+
+pub fn on_runtime_upgrade<T: Trait>() {
+	change_name_contract_to_contracts::<T>()
+}
+
+// Change the storage name used by this pallet from `Contract` to `Contracts`.
+//
+// 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_contract_to_contracts<T: Trait>() {
+	sp_runtime::print("Migrating Contracts.");
+
+	if let Some(gas_spent) = take_storage_value::<Gas>(b"Contract", b"GasSpent", &[]) {
+		put_storage_value(b"Contracts", b"GasSpent", &[], gas_spent);
+	}
+
+	if let Some(current_schedule) = take_storage_value::<Schedule>(b"Contract", b"CurrentSchedule", &[]) {
+		put_storage_value(b"Contracts", b"CurrentSchedule", &[], current_schedule);
+	}
+
+	for (hash, pristine_code) in StorageIterator::<Vec<u8>>::new(b"Contract", b"PristineCode").drain() {
+		put_storage_value(b"Contracts", b"PristineCode", &hash, pristine_code);
+	}
+
+	for (hash, code_storage) in StorageIterator::<wasm::PrefabWasmModule>::new(b"Contract", b"CodeStorage").drain() {
+		put_storage_value(b"Contracts", b"CodeStorage", &hash, code_storage);
+	}
+
+	if let Some(current_schedule) = take_storage_value::<u64>(b"Contract", b"AccountCounter", &[]) {
+		put_storage_value(b"Contracts", b"AccountCounter", &[], current_schedule);
+	}
+
+	for (hash, contract_info_of) in StorageIterator::<ContractInfo<T>>::new(b"Contract", b"ContractInfoOf").drain() {
+		put_storage_value(b"Contracts", b"ContractInfoOf", &hash, contract_info_of);
+	}
+
+	if let Some(get_price) = take_storage_value::<BalanceOf<T>>(b"Contract", b"GetPrice", &[]) {
+		put_storage_value(b"Contracts", b"GetPrice", &[], get_price);
+	}
+}

frame/elections/src/lib.rs

@@ -209,7 +209,7 @@ pub trait Trait: frame_system::Trait {
 }
 
 decl_storage! {
-	trait Store for Module<T: Trait> as Council {
+	trait Store for Module<T: Trait> as Elections {
 		// ---- parameters
 
 		/// How long to give each top candidate to present themselves after the vote ends.

frame/evm/src/lib.rs

@@ -131,7 +131,7 @@ pub trait Trait: frame_system::Trait + pallet_timestamp::Trait {
 }
 
 decl_storage! {
-	trait Store for Module<T: Trait> as Example {
+	trait Store for Module<T: Trait> as EVM {
 		Accounts get(fn accounts) config(): map hasher(blake2_256) H160 => Account;
 		AccountCodes: map hasher(blake2_256) H160 => Vec<u8>;
 		AccountStorages: double_map hasher(blake2_256) H160, hasher(blake2_256) H256 => H256;

frame/example-offchain-worker/src/lib.rs

@@ -106,7 +106,7 @@ pub trait Trait: frame_system::Trait {
 }
 
 decl_storage! {
-	trait Store for Module<T: Trait> as Example {
+	trait Store for Module<T: Trait> as ExampleOffchainWorker {
 		/// A vector of recently submitted prices.
 		///
 		/// This is used to calculate average price, should have bounded size.

frame/example/src/lib.rs

@@ -326,6 +326,10 @@ decl_storage! {
 	// A macro for the Storage trait, and its implementation, for this pallet.
 	// This allows for type-safe usage of the Substrate storage database, so you can
 	// keep things around between blocks.
+	//
+	// It is important to update your storage name so that your pallet's
+	// storage items are isolated from other pallets.
+	// ---------------------------------vvvvvvv
 	trait Store for Module<T: Trait> as Example {
 		// Any storage declarations of the form:
 		//   `pub? Name get(fn getter_name)? [config()|config(myname)] [build(|_| {...})] : <type> (= <new_default_value>)?;`

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>()
+		}
 	}
 }
 

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);
+	}
+}

frame/identity/src/lib.rs

@@ -80,6 +80,7 @@ use frame_system::{self as system, ensure_signed, ensure_root};
 
 #[cfg(feature = "runtime-benchmarks")]
 pub mod benchmarking;
+mod migration;
 
 type BalanceOf<T> = <<T as Trait>::Currency as Currency<<T as frame_system::Trait>::AccountId>>::Balance;
 type NegativeImbalanceOf<T> = <<T as Trait>::Currency as Currency<<T as frame_system::Trait>::AccountId>>::NegativeImbalance;
@@ -382,7 +383,7 @@ pub struct RegistrarInfo<
 }
 
 decl_storage! {
-	trait Store for Module<T: Trait> as Sudo {
+	trait Store for Module<T: Trait> as Identity {
 		/// Information that is pertinent to identify the entity behind an account.
 		pub IdentityOf get(fn identity):
 			map hasher(blake2_256) T::AccountId => Option<Registration<BalanceOf<T>>>;
@@ -873,6 +874,10 @@ decl_module! {
 
 			Self::deposit_event(RawEvent::IdentityKilled(target, deposit));
 		}
+
+		fn on_runtime_upgrade() {
+			migration::on_runtime_upgrade::<T>()
+		}
 	}
 }
 

frame/identity/src/migration.rs

@@ -0,0 +1,52 @@
+// 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, StorageIterator};
+
+pub fn on_runtime_upgrade<T: Trait>() {
+	change_name_sudo_to_identity::<T>()
+}
+
+// Change the storage name used by this pallet from `Sudo` to `Identity`.
+//
+// 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_sudo_to_identity<T: Trait>() {
+	sp_runtime::print("Migrating Identity.");
+
+	for (hash, identity_of) in StorageIterator::<Registration<BalanceOf<T>>>::new(b"Sudo", b"IdentityOf").drain() {
+		put_storage_value(b"Identity", b"IdentityOf", &hash, identity_of);
+	}
+
+	for (hash, super_of) in StorageIterator::<(T::AccountId, Data)>::new(b"Sudo", b"SuperOf").drain() {
+		put_storage_value(b"Identity", b"SuperOf", &hash, super_of);
+	}
+
+	for (hash, subs_of) in StorageIterator::<(BalanceOf<T>, Vec<T::AccountId>)>::new(b"Sudo", b"SubsOf").drain() {
+		put_storage_value(b"Identity", b"SubsOf", &hash, subs_of);
+	}
+
+	if let Some(registrars) = take_storage_value::<Vec<Option<RegistrarInfo<BalanceOf<T>, T::AccountId>>>>(b"Sudo", b"Registrars", &[]) {
+		put_storage_value(b"Identity", b"Registrars", &[], registrars);
+	}
+
+	sp_runtime::print("Done Identity.");
+}

frame/nicks/src/lib.rs

@@ -76,7 +76,7 @@ pub trait Trait: frame_system::Trait {
 }
 
 decl_storage! {
-	trait Store for Module<T: Trait> as Sudo {
+	trait Store for Module<T: Trait> as Nicks {
 		/// The lookup table for names.
 		NameOf: map hasher(blake2_256) T::AccountId => Option<(Vec<u8>, BalanceOf<T>)>;
 	}

frame/support/src/lib.rs

@@ -251,7 +251,7 @@ mod tests {
 	use self::module::Module;
 
 	decl_storage! {
-		trait Store for Module<T: Trait> as Example {
+		trait Store for Module<T: Trait> as Test {
 			pub Data get(fn data) build(|_| vec![(15u32, 42u64)]):
 				linked_map hasher(twox_64_concat) u32 => u64;
 			pub OptionLinkedMap: linked_map hasher(blake2_256) u32 => Option<u32>;
@@ -488,7 +488,7 @@ mod tests {
 	}
 
 	const EXPECTED_METADATA: StorageMetadata = StorageMetadata {
-		prefix: DecodeDifferent::Encode("Example"),
+		prefix: DecodeDifferent::Encode("Test"),
 		entries: DecodeDifferent::Encode(
 			&[
 				StorageEntryMetadata {

frame/support/test/tests/genesisconfig.rs

@@ -24,7 +24,7 @@ frame_support::decl_module! {
 }
 
 frame_support::decl_storage! {
-	trait Store for Module<T: Trait> as Example {
+	trait Store for Module<T: Trait> as Test {
 		pub AppendableDM config(t): double_map hasher(blake2_256) u32, hasher(blake2_256) T::BlockNumber => Vec<u32>;
 	}
 }

frame/transaction-payment/src/lib.rs

@@ -48,6 +48,8 @@ use sp_runtime::{
 };
 use pallet_transaction_payment_rpc_runtime_api::RuntimeDispatchInfo;
 
+mod migration;
+
 type Multiplier = Fixed64;
 type BalanceOf<T> =
 	<<T as Trait>::Currency as Currency<<T as frame_system::Trait>::AccountId>>::Balance;
@@ -77,7 +79,7 @@ pub trait Trait: frame_system::Trait {
 }
 
 decl_storage! {
-	trait Store for Module<T: Trait> as Balances {
+	trait Store for Module<T: Trait> as TransactionPayment {
 		pub NextFeeMultiplier get(fn next_fee_multiplier): Multiplier = Multiplier::from_parts(0);
 	}
 }
@@ -95,6 +97,10 @@ decl_module! {
 				*fm = T::FeeMultiplierUpdate::convert(*fm)
 			});
 		}
+
+		fn on_runtime_upgrade() {
+			migration::on_runtime_upgrade()
+		}
 	}
 }