Rename pallet trait Trait to Config (#7599)

* rename Trait to Config

* add test asserting using Trait is still valid.

* fix ui tests

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

@@ -14,9 +14,9 @@ mod mock;
 mod tests;
 
 /// Configure the pallet by specifying the parameters and types on which it depends.
-pub trait Trait: frame_system::Trait {
+pub trait Config: frame_system::Config {
 	/// Because this pallet emits events, it depends on the runtime's definition of an event.
-	type Event: From<Event<Self>> + Into<<Self as frame_system::Trait>::Event>;
+	type Event: From<Event<Self>> + Into<<Self as frame_system::Config>::Event>;
 }
 
 // The pallet's runtime storage items.
@@ -25,7 +25,7 @@ decl_storage! {
 	// A unique name is used to ensure that the pallet's storage items are isolated.
 	// This name may be updated, but each pallet in the runtime must use a unique name.
 	// ---------------------------------vvvvvvvvvvvvvv
-	trait Store for Module<T: Trait> as TemplateModule {
+	trait Store for Module<T: Config> as TemplateModule {
 		// Learn more about declaring storage items:
 		// https://substrate.dev/docs/en/knowledgebase/runtime/storage#declaring-storage-items
 		Something get(fn something): Option<u32>;
@@ -35,7 +35,7 @@ decl_storage! {
 // Pallets use events to inform users when important changes are made.
 // https://substrate.dev/docs/en/knowledgebase/runtime/events
 decl_event!(
-	pub enum Event<T> where AccountId = <T as frame_system::Trait>::AccountId {
+	pub enum Event<T> where AccountId = <T as frame_system::Config>::AccountId {
 		/// Event documentation should end with an array that provides descriptive names for event
 		/// parameters. [something, who]
 		SomethingStored(u32, AccountId),
@@ -44,7 +44,7 @@ decl_event!(
 
 // Errors inform users that something went wrong.
 decl_error! {
-	pub enum Error for Module<T: Trait> {
+	pub enum Error for Module<T: Config> {
 		/// Error names should be descriptive.
 		NoneValue,
 		/// Errors should have helpful documentation associated with them.
@@ -56,7 +56,7 @@ decl_error! {
 // These functions materialize as "extrinsics", which are often compared to transactions.
 // Dispatchable functions must be annotated with a weight and must return a DispatchResult.
 decl_module! {
-	pub struct Module<T: Trait> for enum Call where origin: T::Origin {
+	pub struct Module<T: Config> for enum Call where origin: T::Origin {
 		// Errors must be initialized if they are used by the pallet.
 		type Error = Error<T>;
 

substrate/bin/node-template/pallets/template/src/mock.rs

@@ -1,4 +1,4 @@
-use crate::{Module, Trait};
+use crate::{Module, Config};
 use sp_core::H256;
 use frame_support::{impl_outer_origin, parameter_types, weights::Weight};
 use sp_runtime::{
@@ -21,7 +21,7 @@ parameter_types! {
 	pub const AvailableBlockRatio: Perbill = Perbill::from_percent(75);
 }
 
-impl system::Trait for Test {
+impl system::Config for Test {
 	type BaseCallFilter = ();
 	type Origin = Origin;
 	type Call = ();
@@ -49,7 +49,7 @@ impl system::Trait for Test {
 	type SystemWeightInfo = ();
 }
 
-impl Trait for Test {
+impl Config for Test {
 	type Event = ();
 }
 

substrate/bin/node-template/runtime/src/lib.rs

@@ -140,7 +140,7 @@ parameter_types! {
 
 // Configure FRAME pallets to include in runtime.
 
-impl frame_system::Trait for Runtime {
+impl frame_system::Config for Runtime {
 	/// The basic call filter to use in dispatchable.
 	type BaseCallFilter = ();
 	/// The identifier used to distinguish between accounts.
@@ -199,11 +199,11 @@ impl frame_system::Trait for Runtime {
 	type SystemWeightInfo = ();
 }
 
-impl pallet_aura::Trait for Runtime {
+impl pallet_aura::Config for Runtime {
 	type AuthorityId = AuraId;
 }
 
-impl pallet_grandpa::Trait for Runtime {
+impl pallet_grandpa::Config for Runtime {
 	type Event = Event;
 	type Call = Call;
 
@@ -226,7 +226,7 @@ parameter_types! {
 	pub const MinimumPeriod: u64 = SLOT_DURATION / 2;
 }
 
-impl pallet_timestamp::Trait for Runtime {
+impl pallet_timestamp::Config for Runtime {
 	/// A timestamp: milliseconds since the unix epoch.
 	type Moment = u64;
 	type OnTimestampSet = Aura;
@@ -239,7 +239,7 @@ parameter_types! {
 	pub const MaxLocks: u32 = 50;
 }
 
-impl pallet_balances::Trait for Runtime {
+impl pallet_balances::Config for Runtime {
 	type MaxLocks = MaxLocks;
 	/// The type for recording an account's balance.
 	type Balance = Balance;
@@ -255,20 +255,20 @@ parameter_types! {
 	pub const TransactionByteFee: Balance = 1;
 }
 
-impl pallet_transaction_payment::Trait for Runtime {
+impl pallet_transaction_payment::Config for Runtime {
 	type OnChargeTransaction = CurrencyAdapter<Balances, ()>;
 	type TransactionByteFee = TransactionByteFee;
 	type WeightToFee = IdentityFee<Balance>;
 	type FeeMultiplierUpdate = ();
 }
 
-impl pallet_sudo::Trait for Runtime {
+impl pallet_sudo::Config for Runtime {
 	type Event = Event;
 	type Call = Call;
 }
 
 /// Configure the pallet template in pallets/template.
-impl template::Trait for Runtime {
+impl template::Config for Runtime {
 	type Event = Event;
 }
 
@@ -457,7 +457,7 @@ impl_runtime_apis! {
 			use frame_benchmarking::{Benchmarking, BenchmarkBatch, add_benchmark, TrackedStorageKey};
 
 			use frame_system_benchmarking::Module as SystemBench;
-			impl frame_system_benchmarking::Trait for Runtime {}
+			impl frame_system_benchmarking::Config for Runtime {}
 
 			let whitelist: Vec<TrackedStorageKey> = vec![
 				// Block Number