Migrate pallet-vesting to pallet attribute macro. (paritytech#8440)

* Migrate pallet-vesting to pallet attribute macro.

* Update metadata type alias.

* Replace 'Module' with 'Pallet' in benchmarking.

* Trigger CI.

Author: shaunxw

frame/vesting/src/benchmarking.rs

@@ -25,7 +25,7 @@ use frame_system::{RawOrigin, Pallet as System};
 use frame_benchmarking::{benchmarks, account, whitelisted_caller, impl_benchmark_test_suite};
 use sp_runtime::traits::Bounded;
 
-use crate::Module as Vesting;
+use crate::Pallet as Vesting;
 
 const SEED: u32 = 0;
 

frame/vesting/src/lib.rs

@@ -15,15 +15,15 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//! # Vesting Module
+//! # Vesting Pallet
 //!
 //! - [`Config`]
 //! - [`Call`]
 //!
 //! ## Overview
 //!
-//! A simple module providing a means of placing a linear curve on an account's locked balance. This
-//! module ensures that there is a lock in place preventing the balance to drop below the *unvested*
+//! A simple pallet providing a means of placing a linear curve on an account's locked balance. This
+//! pallet ensures that there is a lock in place preventing the balance to drop below the *unvested*
 //! amount for any reason other than transaction fee payment.
 //!
 //! As the amount vested increases over time, the amount unvested reduces. However, locks remain in
@@ -34,7 +34,7 @@
 //!
 //! ## Interface
 //!
-//! This module implements the `VestingSchedule` trait.
+//! This pallet implements the `VestingSchedule` trait.
 //!
 //! ### Dispatchable Functions
 //!
@@ -50,37 +50,21 @@ pub mod weights;
 use sp_std::prelude::*;
 use sp_std::fmt::Debug;
 use codec::{Encode, Decode};
-use sp_runtime::{DispatchResult, RuntimeDebug, traits::{
+use sp_runtime::{RuntimeDebug, traits::{
 	StaticLookup, Zero, AtLeast32BitUnsigned, MaybeSerializeDeserialize, Convert
 }};
-use frame_support::{decl_module, decl_event, decl_storage, decl_error, ensure};
+use frame_support::{ensure, pallet_prelude::*};
 use frame_support::traits::{
 	Currency, LockableCurrency, VestingSchedule, WithdrawReasons, LockIdentifier,
 	ExistenceRequirement, Get,
 };
-use frame_system::{ensure_signed, ensure_root};
+use frame_system::{ensure_signed, ensure_root, pallet_prelude::*};
 pub use weights::WeightInfo;
+pub use pallet::*;
 
 type BalanceOf<T> = <<T as Config>::Currency as Currency<<T as frame_system::Config>::AccountId>>::Balance;
 type MaxLocksOf<T> = <<T as Config>::Currency as LockableCurrency<<T as frame_system::Config>::AccountId>>::MaxLocks;
 
-pub trait Config: frame_system::Config {
-	/// The overarching event type.
-	type Event: From<Event<Self>> + Into<<Self as frame_system::Config>::Event>;
-
-	/// The currency trait.
-	type Currency: LockableCurrency<Self::AccountId>;
-
-	/// Convert the block number into a balance.
-	type BlockNumberToBalance: Convert<Self::BlockNumber, BalanceOf<Self>>;
-
-	/// The minimum amount transferred to call `vested_transfer`.
-	type MinVestedTransfer: Get<BalanceOf<Self>>;
-
-	/// Weight information for extrinsics in this pallet.
-	type WeightInfo: WeightInfo;
-}
-
 const VESTING_ID: LockIdentifier = *b"vesting ";
 
 /// Struct to encode the vesting schedule of an individual account.
@@ -116,23 +100,68 @@ impl<
 	}
 }
 
-decl_storage! {
-	trait Store for Module<T: Config> as Vesting {
-		/// Information regarding the vesting of a given account.
-		pub Vesting get(fn vesting):
-			map hasher(blake2_128_concat) T::AccountId
-			=> Option<VestingInfo<BalanceOf<T>, T::BlockNumber>>;
+#[frame_support::pallet]
+pub mod pallet {
+	use super::*;
+
+	#[pallet::config]
+	pub trait Config: frame_system::Config {
+		/// The overarching event type.
+		type Event: From<Event<Self>> + IsType<<Self as frame_system::Config>::Event>;
+
+		/// The currency trait.
+		type Currency: LockableCurrency<Self::AccountId>;
+
+		/// Convert the block number into a balance.
+		type BlockNumberToBalance: Convert<Self::BlockNumber, BalanceOf<Self>>;
+
+		/// The minimum amount transferred to call `vested_transfer`.
+		#[pallet::constant]
+		type MinVestedTransfer: Get<BalanceOf<Self>>;
+
+		/// Weight information for extrinsics in this pallet.
+		type WeightInfo: WeightInfo;
+	}
+
+	/// Information regarding the vesting of a given account.
+	#[pallet::storage]
+	#[pallet::getter(fn vesting)]
+	pub type Vesting<T: Config> = StorageMap<
+		_,
+		Blake2_128Concat,
+		T::AccountId,
+		VestingInfo<BalanceOf<T>, T::BlockNumber>,
+	>;
+
+	#[pallet::pallet]
+	#[pallet::generate_store(pub(super) trait Store)]
+	pub struct Pallet<T>(_);
+
+	#[pallet::genesis_config]
+	pub struct GenesisConfig<T: Config> {
+		pub vesting: Vec<(T::AccountId, T::BlockNumber, T::BlockNumber, BalanceOf<T>)>,
 	}
-	add_extra_genesis {
-		config(vesting): Vec<(T::AccountId, T::BlockNumber, T::BlockNumber, BalanceOf<T>)>;
-		build(|config: &GenesisConfig<T>| {
+
+	#[cfg(feature = "std")]
+	impl<T: Config> Default for GenesisConfig<T> {
+		fn default() -> Self {
+			GenesisConfig {
+				vesting: Default::default(),
+			}
+		}
+	}
+
+	#[pallet::genesis_build]
+	impl<T: Config> GenesisBuild<T> for GenesisConfig<T> {
+		fn build(&self) {
 			use sp_runtime::traits::Saturating;
+
 			// Generate initial vesting configuration
 			// * who - Account which we are generating vesting configuration for
 			// * begin - Block when the account will start to vest
 			// * length - Number of blocks from `begin` until fully vested
 			// * liquid - Number of units which can be spent before vesting begins
-			for &(ref who, begin, length, liquid) in config.vesting.iter() {
+			for &(ref who, begin, length, liquid) in self.vesting.iter() {
 				let balance = T::Currency::free_balance(who);
 				assert!(!balance.is_zero(), "Currencies must be init'd before vesting");
 				// Total genesis `balance` minus `liquid` equals funds locked for vesting
@@ -148,47 +177,41 @@ decl_storage! {
 				let reasons = WithdrawReasons::TRANSFER | WithdrawReasons::RESERVE;
 				T::Currency::set_lock(VESTING_ID, who, locked, reasons);
 			}
-		})
+		}
 	}
-}
 
-decl_event!(
-	pub enum Event<T> where AccountId = <T as frame_system::Config>::AccountId, Balance = BalanceOf<T> {
+	#[pallet::event]
+	#[pallet::generate_deposit(pub(super) fn deposit_event)]
+	#[pallet::metadata(T::AccountId = "AccountId", BalanceOf<T> = "Balance")]
+	pub enum Event<T: Config> {
 		/// The amount vested has been updated. This could indicate more funds are available. The
 		/// balance given is the amount which is left unvested (and thus locked).
 		/// \[account, unvested\]
-		VestingUpdated(AccountId, Balance),
+		VestingUpdated(T::AccountId, BalanceOf<T>),
 		/// An \[account\] has become fully vested. No further vesting can happen.
-		VestingCompleted(AccountId),
+		VestingCompleted(T::AccountId),
 	}
-);
 
-decl_error! {
-	/// Error for the vesting module.
-	pub enum Error for Module<T: Config> {
+	/// Error for the vesting pallet.
+	#[pallet::error]
+	pub enum Error<T> {
 		/// The account given is not vesting.
 		NotVesting,
 		/// An existing vesting schedule already exists for this account that cannot be clobbered.
 		ExistingVestingSchedule,
 		/// Amount being transferred is too low to create a vesting schedule.
 		AmountLow,
 	}
-}
-
-decl_module! {
-	/// Vesting module declaration.
-	pub struct Module<T: Config> for enum Call where origin: T::Origin {
-		type Error = Error<T>;
-
-		/// The minimum amount to be transferred to create a new vesting schedule.
-		const MinVestedTransfer: BalanceOf<T> = T::MinVestedTransfer::get();
 
-		fn deposit_event() = default;
+	#[pallet::hooks]
+	impl<T: Config> Hooks<BlockNumberFor<T>> for Pallet<T> {}
 
+	#[pallet::call]
+	impl<T: Config> Pallet<T> {
 		/// Unlock any vested funds of the sender account.
 		///
 		/// The dispatch origin for this call must be _Signed_ and the sender must have funds still
-		/// locked under this module.
+		/// locked under this pallet.
 		///
 		/// Emits either `VestingCompleted` or `VestingUpdated`.
 		///
@@ -198,10 +221,10 @@ decl_module! {
 		///     - Reads: Vesting Storage, Balances Locks, [Sender Account]
 		///     - Writes: Vesting Storage, Balances Locks, [Sender Account]
 		/// # </weight>
-		#[weight = T::WeightInfo::vest_locked(MaxLocksOf::<T>::get())
+		#[pallet::weight(T::WeightInfo::vest_locked(MaxLocksOf::<T>::get())
 			.max(T::WeightInfo::vest_unlocked(MaxLocksOf::<T>::get()))
-		]
-		fn vest(origin) -> DispatchResult {
+		)]
+		pub fn vest(origin: OriginFor<T>) -> DispatchResult {
 			let who = ensure_signed(origin)?;
 			Self::update_lock(who)
 		}
@@ -211,7 +234,7 @@ decl_module! {
 		/// The dispatch origin for this call must be _Signed_.
 		///
 		/// - `target`: The account whose vested funds should be unlocked. Must have funds still
-		/// locked under this module.
+		/// locked under this pallet.
 		///
 		/// Emits either `VestingCompleted` or `VestingUpdated`.
 		///
@@ -221,10 +244,10 @@ decl_module! {
 		///     - Reads: Vesting Storage, Balances Locks, Target Account
 		///     - Writes: Vesting Storage, Balances Locks, Target Account
 		/// # </weight>
-		#[weight = T::WeightInfo::vest_other_locked(MaxLocksOf::<T>::get())
+		#[pallet::weight(T::WeightInfo::vest_other_locked(MaxLocksOf::<T>::get())
 			.max(T::WeightInfo::vest_other_unlocked(MaxLocksOf::<T>::get()))
-		]
-		fn vest_other(origin, target: <T::Lookup as StaticLookup>::Source) -> DispatchResult {
+		)]
+		pub fn vest_other(origin: OriginFor<T>, target: <T::Lookup as StaticLookup>::Source) -> DispatchResult {
 			ensure_signed(origin)?;
 			Self::update_lock(T::Lookup::lookup(target)?)
 		}
@@ -245,9 +268,9 @@ decl_module! {
 		///     - Reads: Vesting Storage, Balances Locks, Target Account, [Sender Account]
 		///     - Writes: Vesting Storage, Balances Locks, Target Account, [Sender Account]
 		/// # </weight>
-		#[weight = T::WeightInfo::vested_transfer(MaxLocksOf::<T>::get())]
+		#[pallet::weight(T::WeightInfo::vested_transfer(MaxLocksOf::<T>::get()))]
 		pub fn vested_transfer(
-			origin,
+			origin: OriginFor<T>,
 			target: <T::Lookup as StaticLookup>::Source,
 			schedule: VestingInfo<BalanceOf<T>, T::BlockNumber>,
 		) -> DispatchResult {
@@ -282,9 +305,9 @@ decl_module! {
 		///     - Reads: Vesting Storage, Balances Locks, Target Account, Source Account
 		///     - Writes: Vesting Storage, Balances Locks, Target Account, Source Account
 		/// # </weight>
-		#[weight = T::WeightInfo::force_vested_transfer(MaxLocksOf::<T>::get())]
+		#[pallet::weight(T::WeightInfo::force_vested_transfer(MaxLocksOf::<T>::get()))]
 		pub fn force_vested_transfer(
-			origin,
+			origin: OriginFor<T>,
 			source: <T::Lookup as StaticLookup>::Source,
 			target: <T::Lookup as StaticLookup>::Source,
 			schedule: VestingInfo<BalanceOf<T>, T::BlockNumber>,
@@ -306,8 +329,8 @@ decl_module! {
 	}
 }
 
-impl<T: Config> Module<T> {
-	/// (Re)set or remove the module's currency lock on `who`'s account in accordance with their
+impl<T: Config> Pallet<T> {
+	/// (Re)set or remove the pallet's currency lock on `who`'s account in accordance with their
 	/// current unvested amount.
 	fn update_lock(who: T::AccountId) -> DispatchResult {
 		let vesting = Self::vesting(&who).ok_or(Error::<T>::NotVesting)?;
@@ -317,17 +340,17 @@ impl<T: Config> Module<T> {
 		if locked_now.is_zero() {
 			T::Currency::remove_lock(VESTING_ID, &who);
 			Vesting::<T>::remove(&who);
-			Self::deposit_event(RawEvent::VestingCompleted(who));
+			Self::deposit_event(Event::<T>::VestingCompleted(who));
 		} else {
 			let reasons = WithdrawReasons::TRANSFER | WithdrawReasons::RESERVE;
 			T::Currency::set_lock(VESTING_ID, &who, locked_now, reasons);
-			Self::deposit_event(RawEvent::VestingUpdated(who, locked_now));
+			Self::deposit_event(Event::<T>::VestingUpdated(who, locked_now));
 		}
 		Ok(())
 	}
 }
 
-impl<T: Config> VestingSchedule<T::AccountId> for Module<T> where
+impl<T: Config> VestingSchedule<T::AccountId> for Pallet<T> where
 	BalanceOf<T>: MaybeSerializeDeserialize + Debug
 {
 	type Moment = T::BlockNumber;