git.delta.rocks / unique-network / refs/commits / 87b85f039f25

1// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.2// This file is part of Unique Network.34// Unique Network is free software: you can redistribute it and/or modify5// it under the terms of the GNU General Public License as published by6// the Free Software Foundation, either version 3 of the License, or7// (at your option) any later version.89// Unique Network is distributed in the hope that it will be useful,10// but WITHOUT ANY WARRANTY; without even the implied warranty of11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the12// GNU General Public License for more details.1314// You should have received a copy of the GNU General Public License15// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.1617// Original license:18// This file is part of Substrate.1920// Copyright (C) 2017-2022 Parity Technologies (UK) Ltd.21// SPDX-License-Identifier: Apache-2.02223// Licensed under the Apache License, Version 2.0 (the "License");24// you may not use this file except in compliance with the License.25// You may obtain a copy of the License at26//27// 	http://www.apache.org/licenses/LICENSE-2.028//29// Unless required by applicable law or agreed to in writing, software30// distributed under the License is distributed on an "AS IS" BASIS,31// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.32// See the License for the specific language governing permissions and33// limitations under the License.3435//! # Scheduler36//! A Pallet for scheduling dispatches.37//!38//! - [`Config`]39//! - [`Call`]40//! - [`Pallet`]41//!42//! ## Overview43//!44//! This Pallet exposes capabilities for scheduling dispatches to occur at a45//! specified block number or at a specified period. These scheduled dispatches46//! may be named or anonymous and may be canceled.47//!48//! **NOTE:** The scheduled calls will be dispatched with the default filter49//! for the origin: namely `frame_system::Config::BaseCallFilter` for all origin50//! except root which will get no filter. And not the filter contained in origin51//! use to call `fn schedule`.52//!53//! If a call is scheduled using proxy or whatever mecanism which adds filter,54//! then those filter will not be used when dispatching the schedule call.55//!56//! ## Interface57//!58//! ### Dispatchable Functions59//!60//! * `schedule` - schedule a dispatch, which may be periodic, to occur at a specified block and61//!   with a specified priority.62//! * `cancel` - cancel a scheduled dispatch, specified by block number and index.63//! * `schedule_named` - augments the `schedule` interface with an additional `Vec<u8>` parameter64//!   that can be used for identification.65//! * `cancel_named` - the named complement to the cancel function.6667// Ensure we're `no_std` when compiling for Wasm.68#![cfg_attr(not(feature = "std"), no_std)]6970#[cfg(feature = "runtime-benchmarks")]71mod benchmarking;72#[cfg(test)]73mod mock;74#[cfg(test)]75mod tests;76pub mod weights;7778use codec::{Codec, Decode, Encode, MaxEncodedLen};79use frame_support::{80	dispatch::{81		DispatchError, DispatchResult, Dispatchable, GetDispatchInfo, Parameter, PostDispatchInfo,82	},83	traits::{84		schedule::{self, DispatchTime, LOWEST_PRIORITY},85		EnsureOrigin, Get, IsType, OriginTrait, PrivilegeCmp, StorageVersion, PreimageRecipient,86		ConstU32, UnfilteredDispatchable,87	},88	weights::Weight,89	unsigned::TransactionValidityError,90};9192use frame_system::{self as system};93use scale_info::TypeInfo;94use sp_runtime::{95	traits::{BadOrigin, One, Saturating, Zero, Hash},96	BoundedVec, RuntimeDebug, DispatchErrorWithPostInfo,97};98use sp_core::H160;99use sp_std::{borrow::Borrow, cmp::Ordering, marker::PhantomData, prelude::*};100pub use weights::WeightInfo;101102pub use pallet::*;103104/// Just a simple index for naming period tasks.105pub type PeriodicIndex = u32;106/// The location of a scheduled task that can be used to remove it.107pub type TaskAddress<BlockNumber> = (BlockNumber, u32);108109pub type EncodedCall = BoundedVec<u8, ConstU32<128>>;110111#[derive(Clone, Eq, PartialEq, Encode, Decode, RuntimeDebug, TypeInfo, MaxEncodedLen)]112#[scale_info(skip_type_params(T))]113pub enum ScheduledCall<T: Config> {114	Inline(EncodedCall),115	PreimageLookup { hash: T::Hash, unbounded_len: u32 },116}117118impl<T: Config> ScheduledCall<T> {119	pub fn new(call: <T as Config>::RuntimeCall) -> Result<Self, DispatchError> {120		let encoded = call.encode();121		let len = encoded.len();122123		match EncodedCall::try_from(encoded.clone()) {124			Ok(bounded) => Ok(Self::Inline(bounded)),125			Err(_) => {126				let hash = <T as system::Config>::Hashing::hash_of(&encoded);127				<T as Config>::Preimages::note_preimage(128					encoded129						.try_into()130						.map_err(|_| <Error<T>>::TooBigScheduledCall)?,131				);132133				Ok(Self::PreimageLookup {134					hash,135					unbounded_len: len as u32,136				})137			}138		}139	}140141	/// The maximum length of the lookup that is needed to peek `Self`.142	pub fn lookup_len(&self) -> Option<u32> {143		match self {144			Self::Inline(..) => None,145			Self::PreimageLookup { unbounded_len, .. } => Some(*unbounded_len),146		}147	}148149	/// Returns whether the image will require a lookup to be peeked.150	pub fn lookup_needed(&self) -> bool {151		match self {152			Self::Inline(_) => false,153			Self::PreimageLookup { .. } => true,154		}155	}156157	fn decode(mut data: &[u8]) -> Result<<T as Config>::RuntimeCall, DispatchError> {158		<T as Config>::RuntimeCall::decode(&mut data)159			.map_err(|_| <Error<T>>::ScheduledCallCorrupted.into())160	}161}162163pub trait SchedulerPreimages<T: Config>: PreimageRecipient<T::Hash> {164	fn drop(call: &ScheduledCall<T>);165166	fn peek(167		call: &ScheduledCall<T>,168	) -> Result<(<T as pallet::Config>::RuntimeCall, Option<u32>), DispatchError>;169170	/// Convert the given scheduled `call` value back into its original instance. If successful,171	/// `drop` any data backing it. This will not break the realisability of independently172	/// created instances of `ScheduledCall` which happen to have identical data.173	fn realize(174		call: &ScheduledCall<T>,175	) -> Result<(<T as pallet::Config>::RuntimeCall, Option<u32>), DispatchError>;176}177178impl<T: Config, PP: PreimageRecipient<T::Hash>> SchedulerPreimages<T> for PP {179	fn drop(call: &ScheduledCall<T>) {180		match call {181			ScheduledCall::Inline(_) => {}182			ScheduledCall::PreimageLookup { hash, .. } => Self::unrequest_preimage(hash),183		}184	}185186	fn peek(187		call: &ScheduledCall<T>,188	) -> Result<(<T as pallet::Config>::RuntimeCall, Option<u32>), DispatchError> {189		match call {190			ScheduledCall::Inline(data) => Ok((ScheduledCall::<T>::decode(data)?, None)),191			ScheduledCall::PreimageLookup {192				hash,193				unbounded_len,194			} => {195				let (preimage, len) = Self::get_preimage(hash)196					.ok_or(<Error<T>>::PreimageNotFound)197					.map(|preimage| (preimage, *unbounded_len))?;198199				Ok((ScheduledCall::<T>::decode(preimage.as_slice())?, Some(len)))200			}201		}202	}203204	fn realize(205		call: &ScheduledCall<T>,206	) -> Result<(<T as pallet::Config>::RuntimeCall, Option<u32>), DispatchError> {207		let r = Self::peek(call)?;208		Self::drop(call);209		Ok(r)210	}211}212213pub enum ScheduledEnsureOriginSuccess<AccountId> {214	Root,215	Signed(AccountId),216	Unsigned,217}218219pub type TaskName = [u8; 32];220221/// Information regarding an item to be executed in the future.222#[cfg_attr(any(feature = "std", test), derive(PartialEq, Eq))]223#[derive(Clone, RuntimeDebug, Encode, Decode, MaxEncodedLen, TypeInfo)]224pub struct Scheduled<Name, Call, BlockNumber, PalletsOrigin, AccountId> {225	/// The unique identity for this task, if there is one.226	maybe_id: Option<Name>,227228	/// This task's priority.229	priority: schedule::Priority,230231	/// The call to be dispatched.232	call: Call,233234	/// If the call is periodic, then this points to the information concerning that.235	maybe_periodic: Option<schedule::Period<BlockNumber>>,236237	/// The origin with which to dispatch the call.238	origin: PalletsOrigin,239	_phantom: PhantomData<AccountId>,240}241242pub type ScheduledOf<T> = Scheduled<243	TaskName,244	ScheduledCall<T>,245	<T as frame_system::Config>::BlockNumber,246	<T as Config>::PalletsOrigin,247	<T as frame_system::Config>::AccountId,248>;249250struct WeightCounter {251	used: Weight,252	limit: Weight,253}254255impl WeightCounter {256	fn check_accrue(&mut self, w: Weight) -> bool {257		let test = self.used.saturating_add(w);258		if test.any_gt(self.limit) {259			false260		} else {261			self.used = test;262			true263		}264	}265266	fn can_accrue(&mut self, w: Weight) -> bool {267		self.used.saturating_add(w).all_lte(self.limit)268	}269}270271pub(crate) trait MarginalWeightInfo: WeightInfo {272	fn service_task(maybe_lookup_len: Option<usize>, named: bool, periodic: bool) -> Weight {273		let base = Self::service_task_base();274		let mut total = match maybe_lookup_len {275			None => base,276			Some(l) => Self::service_task_fetched(l as u32),277		};278		if named {279			total.saturating_accrue(Self::service_task_named().saturating_sub(base));280		}281		if periodic {282			total.saturating_accrue(Self::service_task_periodic().saturating_sub(base));283		}284		total285	}286}287288impl<T: WeightInfo> MarginalWeightInfo for T {}289290#[frame_support::pallet]291pub mod pallet {292	use super::*;293	use frame_support::{dispatch::PostDispatchInfo, pallet_prelude::*};294	use system::pallet_prelude::*;295296	/// The current storage version.297	const STORAGE_VERSION: StorageVersion = StorageVersion::new(0);298299	#[pallet::pallet]300	#[pallet::generate_store(pub(super) trait Store)]301	#[pallet::storage_version(STORAGE_VERSION)]302	pub struct Pallet<T>(_);303304	#[pallet::config]305	pub trait Config: frame_system::Config {306		type RuntimeEvent: From<Event<Self>> + IsType<<Self as frame_system::Config>::RuntimeEvent>;307308		/// The aggregated origin which the dispatch will take.309		type RuntimeOrigin: OriginTrait<PalletsOrigin = Self::PalletsOrigin>310			+ From<Self::PalletsOrigin>311			+ IsType<<Self as system::Config>::RuntimeOrigin>312			+ Clone;313314		/// The caller origin, overarching type of all pallets origins.315		type PalletsOrigin: From<system::RawOrigin<Self::AccountId>>316			+ Codec317			+ Clone318			+ Eq319			+ TypeInfo320			+ MaxEncodedLen;321322		/// The aggregated call type.323		type RuntimeCall: Parameter324			+ Dispatchable<325				RuntimeOrigin = <Self as Config>::RuntimeOrigin,326				PostInfo = PostDispatchInfo,327			> + UnfilteredDispatchable<RuntimeOrigin = <Self as system::Config>::RuntimeOrigin>328			+ GetDispatchInfo329			+ From<system::Call<Self>>;330331		/// The maximum weight that may be scheduled per block for any dispatchables.332		#[pallet::constant]333		type MaximumWeight: Get<Weight>;334335		/// Required origin to schedule or cancel calls.336		type ScheduleOrigin: EnsureOrigin<337			<Self as system::Config>::RuntimeOrigin,338			Success = ScheduledEnsureOriginSuccess<Self::AccountId>,339		>;340341		/// Compare the privileges of origins.342		///343		/// This will be used when canceling a task, to ensure that the origin that tries344		/// to cancel has greater or equal privileges as the origin that created the scheduled task.345		///346		/// For simplicity the [`EqualPrivilegeOnly`](frame_support::traits::EqualPrivilegeOnly) can347		/// be used. This will only check if two given origins are equal.348		type OriginPrivilegeCmp: PrivilegeCmp<Self::PalletsOrigin>;349350		/// The maximum number of scheduled calls in the queue for a single block.351		#[pallet::constant]352		type MaxScheduledPerBlock: Get<u32>;353354		/// Weight information for extrinsics in this pallet.355		type WeightInfo: WeightInfo;356357		/// The preimage provider with which we look up call hashes to get the call.358		type Preimages: SchedulerPreimages<Self>;359360		/// The helper type used for custom transaction fee logic.361		type CallExecutor: DispatchCall<Self, H160>;362363		/// Required origin to set/change calls' priority.364		type PrioritySetOrigin: EnsureOrigin<<Self as system::Config>::RuntimeOrigin>;365	}366367	#[pallet::storage]368	pub type IncompleteSince<T: Config> = StorageValue<_, T::BlockNumber>;369370	/// Items to be executed, indexed by the block number that they should be executed on.371	#[pallet::storage]372	pub type Agenda<T: Config> = StorageMap<373		_,374		Twox64Concat,375		T::BlockNumber,376		BoundedVec<Option<ScheduledOf<T>>, T::MaxScheduledPerBlock>,377		ValueQuery,378	>;379380	/// Lookup from a name to the block number and index of the task.381	#[pallet::storage]382	pub(crate) type Lookup<T: Config> =383		StorageMap<_, Twox64Concat, TaskName, TaskAddress<T::BlockNumber>>;384385	/// Events type.386	#[pallet::event]387	#[pallet::generate_deposit(pub(super) fn deposit_event)]388	pub enum Event<T: Config> {389		/// Scheduled some task.390		Scheduled { when: T::BlockNumber, index: u32 },391		/// Canceled some task.392		Canceled { when: T::BlockNumber, index: u32 },393		/// Dispatched some task.394		Dispatched {395			task: TaskAddress<T::BlockNumber>,396			id: Option<[u8; 32]>,397			result: DispatchResult,398		},399		/// Scheduled task's priority has changed400		PriorityChanged {401			when: T::BlockNumber,402			index: u32,403			priority: schedule::Priority,404		},405		/// The call for the provided hash was not found so the task has been aborted.406		CallUnavailable {407			task: TaskAddress<T::BlockNumber>,408			id: Option<[u8; 32]>,409		},410		/// The given task was unable to be renewed since the agenda is full at that block.411		PeriodicFailed {412			task: TaskAddress<T::BlockNumber>,413			id: Option<[u8; 32]>,414		},415		/// The given task can never be executed since it is overweight.416		PermanentlyOverweight {417			task: TaskAddress<T::BlockNumber>,418			id: Option<[u8; 32]>,419		},420	}421422	#[pallet::error]423	pub enum Error<T> {424		/// Failed to schedule a call425		FailedToSchedule,426		/// There is no place for a new task in the agenda427		AgendaIsExhausted,428		/// Scheduled call is corrupted429		ScheduledCallCorrupted,430		/// Scheduled call preimage is not found431		PreimageNotFound,432		/// Scheduled call is too big433		TooBigScheduledCall,434		/// Cannot find the scheduled call.435		NotFound,436		/// Given target block number is in the past.437		TargetBlockNumberInPast,438		/// Attempt to use a non-named function on a named task.439		Named,440	}441442	#[pallet::hooks]443	impl<T: Config> Hooks<BlockNumberFor<T>> for Pallet<T> {444		/// Execute the scheduled calls445		fn on_initialize(now: T::BlockNumber) -> Weight {446			let mut weight_counter = WeightCounter {447				used: Weight::zero(),448				limit: T::MaximumWeight::get(),449			};450			Self::service_agendas(&mut weight_counter, now, u32::max_value());451			weight_counter.used452		}453	}454455	#[pallet::call]456	impl<T: Config> Pallet<T> {457		/// Anonymously schedule a task.458		#[pallet::weight(<T as Config>::WeightInfo::schedule(T::MaxScheduledPerBlock::get()))]459		pub fn schedule(460			origin: OriginFor<T>,461			when: T::BlockNumber,462			maybe_periodic: Option<schedule::Period<T::BlockNumber>>,463			priority: Option<schedule::Priority>,464			call: Box<<T as Config>::RuntimeCall>,465		) -> DispatchResult {466			T::ScheduleOrigin::ensure_origin(origin.clone())?;467468			if priority.is_some() {469				T::PrioritySetOrigin::ensure_origin(origin.clone())?;470			}471472			let origin = <T as Config>::RuntimeOrigin::from(origin);473			Self::do_schedule(474				DispatchTime::At(when),475				maybe_periodic,476				priority.unwrap_or(LOWEST_PRIORITY),477				origin.caller().clone(),478				<ScheduledCall<T>>::new(*call)?,479			)?;480			Ok(())481		}482483		/// Cancel an anonymously scheduled task.484		#[pallet::weight(<T as Config>::WeightInfo::cancel(T::MaxScheduledPerBlock::get()))]485		pub fn cancel(origin: OriginFor<T>, when: T::BlockNumber, index: u32) -> DispatchResult {486			T::ScheduleOrigin::ensure_origin(origin.clone())?;487			let origin = <T as Config>::RuntimeOrigin::from(origin);488			Self::do_cancel(Some(origin.caller().clone()), (when, index))?;489			Ok(())490		}491492		/// Schedule a named task.493		#[pallet::weight(<T as Config>::WeightInfo::schedule_named(T::MaxScheduledPerBlock::get()))]494		pub fn schedule_named(495			origin: OriginFor<T>,496			id: TaskName,497			when: T::BlockNumber,498			maybe_periodic: Option<schedule::Period<T::BlockNumber>>,499			priority: Option<schedule::Priority>,500			call: Box<<T as Config>::RuntimeCall>,501		) -> DispatchResult {502			T::ScheduleOrigin::ensure_origin(origin.clone())?;503504			if priority.is_some() {505				T::PrioritySetOrigin::ensure_origin(origin.clone())?;506			}507508			let origin = <T as Config>::RuntimeOrigin::from(origin);509			Self::do_schedule_named(510				id,511				DispatchTime::At(when),512				maybe_periodic,513				priority.unwrap_or(LOWEST_PRIORITY),514				origin.caller().clone(),515				<ScheduledCall<T>>::new(*call)?,516			)?;517			Ok(())518		}519520		/// Cancel a named scheduled task.521		#[pallet::weight(<T as Config>::WeightInfo::cancel_named(T::MaxScheduledPerBlock::get()))]522		pub fn cancel_named(origin: OriginFor<T>, id: TaskName) -> DispatchResult {523			T::ScheduleOrigin::ensure_origin(origin.clone())?;524			let origin = <T as Config>::RuntimeOrigin::from(origin);525			Self::do_cancel_named(Some(origin.caller().clone()), id)?;526			Ok(())527		}528529		/// Anonymously schedule a task after a delay.530		///531		/// # <weight>532		/// Same as [`schedule`].533		/// # </weight>534		#[pallet::weight(<T as Config>::WeightInfo::schedule(T::MaxScheduledPerBlock::get()))]535		pub fn schedule_after(536			origin: OriginFor<T>,537			after: T::BlockNumber,538			maybe_periodic: Option<schedule::Period<T::BlockNumber>>,539			priority: Option<schedule::Priority>,540			call: Box<<T as Config>::RuntimeCall>,541		) -> DispatchResult {542			T::ScheduleOrigin::ensure_origin(origin.clone())?;543544			if priority.is_some() {545				T::PrioritySetOrigin::ensure_origin(origin.clone())?;546			}547548			let origin = <T as Config>::RuntimeOrigin::from(origin);549			Self::do_schedule(550				DispatchTime::After(after),551				maybe_periodic,552				priority.unwrap_or(LOWEST_PRIORITY),553				origin.caller().clone(),554				<ScheduledCall<T>>::new(*call)?,555			)?;556			Ok(())557		}558559		/// Schedule a named task after a delay.560		///561		/// # <weight>562		/// Same as [`schedule_named`](Self::schedule_named).563		/// # </weight>564		#[pallet::weight(<T as Config>::WeightInfo::schedule_named(T::MaxScheduledPerBlock::get()))]565		pub fn schedule_named_after(566			origin: OriginFor<T>,567			id: TaskName,568			after: T::BlockNumber,569			maybe_periodic: Option<schedule::Period<T::BlockNumber>>,570			priority: Option<schedule::Priority>,571			call: Box<<T as Config>::RuntimeCall>,572		) -> DispatchResult {573			T::ScheduleOrigin::ensure_origin(origin.clone())?;574575			if priority.is_some() {576				T::PrioritySetOrigin::ensure_origin(origin.clone())?;577			}578579			let origin = <T as Config>::RuntimeOrigin::from(origin);580			Self::do_schedule_named(581				id,582				DispatchTime::After(after),583				maybe_periodic,584				priority.unwrap_or(LOWEST_PRIORITY),585				origin.caller().clone(),586				<ScheduledCall<T>>::new(*call)?,587			)?;588			Ok(())589		}590591		#[pallet::weight(<T as Config>::WeightInfo::change_named_priority(T::MaxScheduledPerBlock::get()))]592		pub fn change_named_priority(593			origin: OriginFor<T>,594			id: TaskName,595			priority: schedule::Priority,596		) -> DispatchResult {597			T::PrioritySetOrigin::ensure_origin(origin.clone())?;598			let origin = <T as Config>::RuntimeOrigin::from(origin);599			Self::do_change_named_priority(origin.caller().clone(), id, priority)600		}601	}602}603604impl<T: Config> Pallet<T> {605	fn resolve_time(when: DispatchTime<T::BlockNumber>) -> Result<T::BlockNumber, DispatchError> {606		let now = frame_system::Pallet::<T>::block_number();607608		let when = match when {609			DispatchTime::At(x) => x,610			// The current block has already completed it's scheduled tasks, so611			// Schedule the task at lest one block after this current block.612			DispatchTime::After(x) => now.saturating_add(x).saturating_add(One::one()),613		};614615		if when <= now {616			return Err(Error::<T>::TargetBlockNumberInPast.into());617		}618619		Ok(when)620	}621622	fn place_task(623		when: T::BlockNumber,624		what: ScheduledOf<T>,625	) -> Result<TaskAddress<T::BlockNumber>, (DispatchError, ScheduledOf<T>)> {626		let maybe_name = what.maybe_id;627		let index = Self::push_to_agenda(when, what)?;628		let address = (when, index);629		if let Some(name) = maybe_name {630			Lookup::<T>::insert(name, address)631		}632		Self::deposit_event(Event::Scheduled {633			when: address.0,634			index: address.1,635		});636		Ok(address)637	}638639	fn push_to_agenda(640		when: T::BlockNumber,641		what: ScheduledOf<T>,642	) -> Result<u32, (DispatchError, ScheduledOf<T>)> {643		let mut agenda = Agenda::<T>::get(when);644		let index = if (agenda.len() as u32) < T::MaxScheduledPerBlock::get() {645			// will always succeed due to the above check.646			let _ = agenda.try_push(Some(what));647			agenda.len() as u32 - 1648		} else {649			if let Some(hole_index) = agenda.iter().position(|i| i.is_none()) {650				agenda[hole_index] = Some(what);651				hole_index as u32652			} else {653				return Err((<Error<T>>::AgendaIsExhausted.into(), what));654			}655		};656		Agenda::<T>::insert(when, agenda);657		Ok(index)658	}659660	fn do_schedule(661		when: DispatchTime<T::BlockNumber>,662		maybe_periodic: Option<schedule::Period<T::BlockNumber>>,663		priority: schedule::Priority,664		origin: T::PalletsOrigin,665		call: ScheduledCall<T>,666	) -> Result<TaskAddress<T::BlockNumber>, DispatchError> {667		let when = Self::resolve_time(when)?;668669		// sanitize maybe_periodic670		let maybe_periodic = maybe_periodic671			.filter(|p| p.1 > 1 && !p.0.is_zero())672			// Remove one from the number of repetitions since we will schedule one now.673			.map(|(p, c)| (p, c - 1));674		let task = Scheduled {675			maybe_id: None,676			priority,677			call,678			maybe_periodic,679			origin,680			_phantom: PhantomData,681		};682		Self::place_task(when, task).map_err(|x| x.0)683	}684685	fn do_cancel(686		origin: Option<T::PalletsOrigin>,687		(when, index): TaskAddress<T::BlockNumber>,688	) -> Result<(), DispatchError> {689		let scheduled = Agenda::<T>::try_mutate(when, |agenda| {690			agenda.get_mut(index as usize).map_or(691				Ok(None),692				|s| -> Result<Option<Scheduled<_, _, _, _, _>>, DispatchError> {693					if let (Some(ref o), Some(ref s)) = (origin, s.borrow()) {694						if matches!(695							T::OriginPrivilegeCmp::cmp_privilege(o, &s.origin),696							Some(Ordering::Less) | None697						) {698							return Err(BadOrigin.into());699						}700					};701					Ok(s.take())702				},703			)704		})?;705		if let Some(s) = scheduled {706			T::Preimages::drop(&s.call);707708			if let Some(id) = s.maybe_id {709				Lookup::<T>::remove(id);710			}711			Self::deposit_event(Event::Canceled { when, index });712			Ok(())713		} else {714			return Err(Error::<T>::NotFound.into());715		}716	}717718	fn do_schedule_named(719		id: TaskName,720		when: DispatchTime<T::BlockNumber>,721		maybe_periodic: Option<schedule::Period<T::BlockNumber>>,722		priority: schedule::Priority,723		origin: T::PalletsOrigin,724		call: ScheduledCall<T>,725	) -> Result<TaskAddress<T::BlockNumber>, DispatchError> {726		// ensure id it is unique727		if Lookup::<T>::contains_key(&id) {728			return Err(Error::<T>::FailedToSchedule.into());729		}730731		let when = Self::resolve_time(when)?;732733		// sanitize maybe_periodic734		let maybe_periodic = maybe_periodic735			.filter(|p| p.1 > 1 && !p.0.is_zero())736			// Remove one from the number of repetitions since we will schedule one now.737			.map(|(p, c)| (p, c - 1));738739		let task = Scheduled {740			maybe_id: Some(id),741			priority,742			call,743			maybe_periodic,744			origin,745			_phantom: Default::default(),746		};747		Self::place_task(when, task).map_err(|x| x.0)748	}749750	fn do_cancel_named(origin: Option<T::PalletsOrigin>, id: TaskName) -> DispatchResult {751		Lookup::<T>::try_mutate_exists(id, |lookup| -> DispatchResult {752			if let Some((when, index)) = lookup.take() {753				let i = index as usize;754				Agenda::<T>::try_mutate(when, |agenda| -> DispatchResult {755					if let Some(s) = agenda.get_mut(i) {756						if let (Some(ref o), Some(ref s)) = (origin, s.borrow()) {757							if matches!(758								T::OriginPrivilegeCmp::cmp_privilege(o, &s.origin),759								Some(Ordering::Less) | None760							) {761								return Err(BadOrigin.into());762							}763							T::Preimages::drop(&s.call);764						}765						*s = None;766					}767					Ok(())768				})?;769				Self::deposit_event(Event::Canceled { when, index });770				Ok(())771			} else {772				return Err(Error::<T>::NotFound.into());773			}774		})775	}776777	fn do_change_named_priority(778		origin: T::PalletsOrigin,779		id: TaskName,780		priority: schedule::Priority,781	) -> DispatchResult {782		match Lookup::<T>::get(id) {783			Some((when, index)) => {784				let i = index as usize;785				Agenda::<T>::try_mutate(when, |agenda| {786					if let Some(Some(s)) = agenda.get_mut(i) {787						if matches!(788							T::OriginPrivilegeCmp::cmp_privilege(&origin, &s.origin),789							Some(Ordering::Less) | None790						) {791							return Err(BadOrigin.into());792						}793794						s.priority = priority;795						Self::deposit_event(Event::PriorityChanged {796							when,797							index,798							priority,799						});800					}801					Ok(())802				})803			}804			None => Err(Error::<T>::NotFound.into()),805		}806	}807}808809enum ServiceTaskError {810	/// Could not be executed due to missing preimage.811	Unavailable,812	/// Could not be executed due to weight limitations.813	Overweight,814}815use ServiceTaskError::*;816817/// A Scheduler-Runtime interface for finer payment handling.818pub trait DispatchCall<T: frame_system::Config + Config, SelfContainedSignedInfo> {819	/// Resolve the call dispatch, including any post-dispatch operations.820	fn dispatch_call(821		signer: Option<T::AccountId>,822		function: <T as Config>::RuntimeCall,823	) -> Result<824		Result<PostDispatchInfo, DispatchErrorWithPostInfo<PostDispatchInfo>>,825		TransactionValidityError,826	>;827}828829impl<T: Config> Pallet<T> {830	/// Service up to `max` agendas queue starting from earliest incompletely executed agenda.831	fn service_agendas(weight: &mut WeightCounter, now: T::BlockNumber, max: u32) {832		if !weight.check_accrue(T::WeightInfo::service_agendas_base()) {833			return;834		}835836		let mut incomplete_since = now + One::one();837		let mut when = IncompleteSince::<T>::take().unwrap_or(now);838		let mut executed = 0;839840		let max_items = T::MaxScheduledPerBlock::get();841		let mut count_down = max;842		let service_agenda_base_weight = T::WeightInfo::service_agenda_base(max_items);843		while count_down > 0 && when <= now && weight.can_accrue(service_agenda_base_weight) {844			if !Self::service_agenda(weight, &mut executed, now, when, u32::max_value()) {845				incomplete_since = incomplete_since.min(when);846			}847			when.saturating_inc();848			count_down.saturating_dec();849		}850		incomplete_since = incomplete_since.min(when);851		if incomplete_since <= now {852			IncompleteSince::<T>::put(incomplete_since);853		}854	}855856	/// Returns `true` if the agenda was fully completed, `false` if it should be revisited at a857	/// later block.858	fn service_agenda(859		weight: &mut WeightCounter,860		executed: &mut u32,861		now: T::BlockNumber,862		when: T::BlockNumber,863		max: u32,864	) -> bool {865		let mut agenda = Agenda::<T>::get(when);866		let mut ordered = agenda867			.iter()868			.enumerate()869			.filter_map(|(index, maybe_item)| {870				maybe_item871					.as_ref()872					.map(|item| (index as u32, item.priority))873			})874			.collect::<Vec<_>>();875		ordered.sort_by_key(|k| k.1);876		let within_limit =877			weight.check_accrue(T::WeightInfo::service_agenda_base(ordered.len() as u32));878		debug_assert!(879			within_limit,880			"weight limit should have been checked in advance"881		);882883		// Items which we know can be executed and have postponed for execution in a later block.884		let mut postponed = (ordered.len() as u32).saturating_sub(max);885		// Items which we don't know can ever be executed.886		let mut dropped = 0;887888		for (agenda_index, _) in ordered.into_iter().take(max as usize) {889			let task = match agenda[agenda_index as usize].take() {890				None => continue,891				Some(t) => t,892			};893			let base_weight = T::WeightInfo::service_task(894				task.call.lookup_len().map(|x| x as usize),895				task.maybe_id.is_some(),896				task.maybe_periodic.is_some(),897			);898			if !weight.can_accrue(base_weight) {899				postponed += 1;900				break;901			}902			let result = Self::service_task(weight, now, when, agenda_index, *executed == 0, task);903			agenda[agenda_index as usize] = match result {904				Err((Unavailable, slot)) => {905					dropped += 1;906					slot907				}908				Err((Overweight, slot)) => {909					postponed += 1;910					slot911				}912				Ok(()) => {913					*executed += 1;914					None915				}916			};917		}918		if postponed > 0 || dropped > 0 {919			Agenda::<T>::insert(when, agenda);920		} else {921			Agenda::<T>::remove(when);922		}923		postponed == 0924	}925926	/// Service (i.e. execute) the given task, being careful not to overflow the `weight` counter.927	///928	/// This involves:929	/// - removing and potentially replacing the `Lookup` entry for the task.930	/// - realizing the task's call which can include a preimage lookup.931	/// - Rescheduling the task for execution in a later agenda if periodic.932	fn service_task(933		weight: &mut WeightCounter,934		now: T::BlockNumber,935		when: T::BlockNumber,936		agenda_index: u32,937		is_first: bool,938		mut task: ScheduledOf<T>,939	) -> Result<(), (ServiceTaskError, Option<ScheduledOf<T>>)> {940		let (call, lookup_len) = match T::Preimages::peek(&task.call) {941			Ok(c) => c,942			Err(_) => {943				if let Some(ref id) = task.maybe_id {944					Lookup::<T>::remove(id);945				}946947				return Err((Unavailable, Some(task)));948			}949		};950951		weight.check_accrue(T::WeightInfo::service_task(952			lookup_len.map(|x| x as usize),953			task.maybe_id.is_some(),954			task.maybe_periodic.is_some(),955		));956957		match Self::execute_dispatch(weight, task.origin.clone(), call) {958			Err(Unavailable) => {959				debug_assert!(false, "Checked to exist with `peek`");960961				if let Some(ref id) = task.maybe_id {962					Lookup::<T>::remove(id);963				}964965				Self::deposit_event(Event::CallUnavailable {966					task: (when, agenda_index),967					id: task.maybe_id,968				});969				Err((Unavailable, Some(task)))970			}971			Err(Overweight) if is_first => {972				T::Preimages::drop(&task.call);973974				if let Some(ref id) = task.maybe_id {975					Lookup::<T>::remove(id);976				}977978				Self::deposit_event(Event::PermanentlyOverweight {979					task: (when, agenda_index),980					id: task.maybe_id,981				});982				Err((Unavailable, Some(task)))983			}984			Err(Overweight) => {985				// Preserve Lookup -- the task will be postponed.986				Err((Overweight, Some(task)))987			}988			Ok(result) => {989				Self::deposit_event(Event::Dispatched {990					task: (when, agenda_index),991					id: task.maybe_id,992					result,993				});994995				let is_canceled = task996					.maybe_id997					.as_ref()998					.map(|id| !Lookup::<T>::contains_key(id))999					.unwrap_or(false);10001001				match &task.maybe_periodic {1002					&Some((period, count)) if !is_canceled => {1003						if count > 1 {1004							task.maybe_periodic = Some((period, count - 1));1005						} else {1006							task.maybe_periodic = None;1007						}1008						let wake = now.saturating_add(period);1009						match Self::place_task(wake, task) {1010							Ok(_) => {}1011							Err((_, task)) => {1012								// TODO: Leave task in storage somewhere for it to be rescheduled1013								// manually.1014								T::Preimages::drop(&task.call);1015								Self::deposit_event(Event::PeriodicFailed {1016									task: (when, agenda_index),1017									id: task.maybe_id,1018								});1019							}1020						}1021					}1022					_ => {1023						if let Some(ref id) = task.maybe_id {1024							Lookup::<T>::remove(id);1025						}10261027						T::Preimages::drop(&task.call)1028					}1029				}1030				Ok(())1031			}1032		}1033	}10341035	/// Make a dispatch to the given `call` from the given `origin`, ensuring that the `weight`1036	/// counter does not exceed its limit and that it is counted accurately (e.g. accounted using1037	/// post info if available).1038	///1039	/// NOTE: Only the weight for this function will be counted (origin lookup, dispatch and the1040	/// call itself).1041	fn execute_dispatch(1042		weight: &mut WeightCounter,1043		origin: T::PalletsOrigin,1044		call: <T as Config>::RuntimeCall,1045	) -> Result<DispatchResult, ServiceTaskError> {1046		let dispatch_origin: <T as Config>::RuntimeOrigin = origin.into();1047		let base_weight = match dispatch_origin.clone().as_signed() {1048			Some(_) => T::WeightInfo::execute_dispatch_signed(),1049			_ => T::WeightInfo::execute_dispatch_unsigned(),1050		};1051		let call_weight = call.get_dispatch_info().weight;1052		// We only allow a scheduled call if it cannot push the weight past the limit.1053		let max_weight = base_weight.saturating_add(call_weight);10541055		if !weight.can_accrue(max_weight) {1056			return Err(Overweight);1057		}10581059		// let scheduled_origin =1060		// 	<<T as Config>::Origin as From<T::PalletsOrigin>>::from(origin.clone());1061		let ensured_origin = T::ScheduleOrigin::ensure_origin(dispatch_origin.into());10621063		let r = match ensured_origin {1064			Ok(ScheduledEnsureOriginSuccess::Root) => {1065				Ok(call.dispatch_bypass_filter(frame_system::RawOrigin::Root.into()))1066			}1067			Ok(ScheduledEnsureOriginSuccess::Signed(sender)) => {1068				// Execute transaction via chain default pipeline1069				// That means dispatch will be processed like any user's extrinsic e.g. transaction fees will be taken1070				T::CallExecutor::dispatch_call(Some(sender), call.clone())1071			}1072			Ok(ScheduledEnsureOriginSuccess::Unsigned) => {1073				// Unsigned version of the above1074				T::CallExecutor::dispatch_call(None, call.clone())1075			}1076			Err(e) => Ok(Err(e.into())),1077		};10781079		let (maybe_actual_call_weight, result) = match r {1080			Ok(result) => match result {1081				Ok(post_info) => (post_info.actual_weight, Ok(())),1082				Err(error_and_info) => (1083					error_and_info.post_info.actual_weight,1084					Err(error_and_info.error),1085				),1086			},1087			Err(_) => {1088				log::error!(1089					target: "runtime::scheduler",1090					"Warning: Scheduler has failed to execute a post-dispatch transaction. \1091					This block might have become invalid.");1092				(None, Err(DispatchError::CannotLookup))1093			}1094		};1095		let call_weight = maybe_actual_call_weight.unwrap_or(call_weight);1096		weight.check_accrue(base_weight);1097		weight.check_accrue(call_weight);1098		Ok(result)1099	}1100}