git.delta.rocks / unique-network / refs/commits / d3f82d74419a

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-2.0>28//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//! # Unique 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//! should be named and may be canceled.47//!48//! **NOTE:** The unique scheduler is designed for deferred transaction calls by block number.49//! Any user can book a call of a certain transaction to a specific block number.50//! Also possible to book a call with a certain frequency.51//!52//! Key differences from the original pallet:53//! <https://crates.io/crates/pallet-scheduler>54//! Schedule Id restricted by 16 bytes. Identificator for booked call.55//! Priority limited by HARD DEADLINE (<= 63). Calls over maximum weight don't include to block.56//! The maximum weight that may be scheduled per block for any dispatchables of less priority than `schedule::HARD_DEADLINE`.57//! Maybe_periodic limit is 100 calls. Reserved for future sponsored transaction support.58//! At 100 calls reserved amount is not so much and this is avoid potential problems with balance locks.59//! Any account allowed to schedule any calls. Account withdraw implemented through default transaction logic.60//!61//! ## Interface62//!63//! ### Dispatchable Functions64//!65//! * `schedule_named` - augments the `schedule` interface with an additional `Vec<u8>` parameter66//!   that can be used for identification.67//! * `cancel_named` - the named complement to the cancel function.6869// Ensure we're `no_std` when compiling for Wasm.70#![cfg_attr(not(feature = "std"), no_std)]7172#[cfg(feature = "runtime-benchmarks")]73mod benchmarking;7475pub mod weights;7677use sp_core::H160;78use codec::{Codec, Decode, Encode};79use frame_system::{self as system, ensure_signed};80pub use pallet::*;81use scale_info::TypeInfo;82use sp_runtime::{83	traits::{BadOrigin, One, Saturating, Zero},84	RuntimeDebug, DispatchErrorWithPostInfo,85};86use sp_std::{borrow::Borrow, cmp::Ordering, marker::PhantomData, prelude::*};8788use frame_support::{89	dispatch::{DispatchError, DispatchResult, Dispatchable, UnfilteredDispatchable, Parameter},90	traits::{91		schedule::{self, DispatchTime, MaybeHashed},92		NamedReservableCurrency, EnsureOrigin, Get, IsType, OriginTrait, PrivilegeCmp,93		StorageVersion,94	},95	weights::{Weight},96};9798pub use weights::WeightInfo;99100/// The location of a scheduled task that can be used to remove it.101pub type TaskAddress<BlockNumber> = (BlockNumber, u32);102pub const MAX_TASK_ID_LENGTH_IN_BYTES: u8 = 16;103104type ScheduledId = [u8; MAX_TASK_ID_LENGTH_IN_BYTES as usize];105pub type CallOrHashOf<T> =106	MaybeHashed<<T as Config>::RuntimeCall, <T as frame_system::Config>::Hash>;107108/// Information regarding an item to be executed in the future.109#[cfg_attr(any(feature = "std", test), derive(PartialEq, Eq))]110#[derive(Clone, RuntimeDebug, Encode, Decode, TypeInfo)]111pub struct ScheduledV3<Call, BlockNumber, PalletsOrigin, AccountId> {112	/// The unique identity for this task, if there is one.113	maybe_id: Option<ScheduledId>,114	/// This task's priority.115	priority: schedule::Priority,116	/// The call to be dispatched.117	call: Call,118	/// If the call is periodic, then this points to the information concerning that.119	maybe_periodic: Option<schedule::Period<BlockNumber>>,120	/// The origin to dispatch the call.121	origin: PalletsOrigin,122	_phantom: PhantomData<AccountId>,123}124125pub type ScheduledV3Of<T> = ScheduledV3<126	CallOrHashOf<T>,127	<T as frame_system::Config>::BlockNumber,128	<T as Config>::PalletsOrigin,129	<T as frame_system::Config>::AccountId,130>;131132pub type ScheduledOf<T> = ScheduledV3Of<T>;133134/// The current version of Scheduled struct.135pub type Scheduled<Call, BlockNumber, PalletsOrigin, AccountId> =136	ScheduledV3<Call, BlockNumber, PalletsOrigin, AccountId>;137138pub enum ScheduledEnsureOriginSuccess<AccountId> {139	Root,140	Signed(AccountId),141	Unsigned,142}143144#[cfg(feature = "runtime-benchmarks")]145mod preimage_provider {146	use frame_support::traits::PreimageRecipient;147	pub trait PreimageProviderAndMaybeRecipient<H>: PreimageRecipient<H> {}148	impl<H, T: PreimageRecipient<H>> PreimageProviderAndMaybeRecipient<H> for T {}149}150151#[cfg(not(feature = "runtime-benchmarks"))]152mod preimage_provider {153	use frame_support::traits::PreimageProvider;154	pub trait PreimageProviderAndMaybeRecipient<H>: PreimageProvider<H> {}155	impl<H, T: PreimageProvider<H>> PreimageProviderAndMaybeRecipient<H> for T {}156}157158pub use preimage_provider::PreimageProviderAndMaybeRecipient;159160pub(crate) trait MarginalWeightInfo: WeightInfo {161	fn item(periodic: bool, named: bool, resolved: Option<bool>) -> Weight {162		match (periodic, named, resolved) {163			(_, false, None) => Self::on_initialize_aborted(2) - Self::on_initialize_aborted(1),164			(_, true, None) => {165				Self::on_initialize_named_aborted(2) - Self::on_initialize_named_aborted(1)166			}167			(false, false, Some(false)) => Self::on_initialize(2) - Self::on_initialize(1),168			(false, true, Some(false)) => {169				Self::on_initialize_named(2) - Self::on_initialize_named(1)170			}171			(true, false, Some(false)) => {172				Self::on_initialize_periodic(2) - Self::on_initialize_periodic(1)173			}174			(true, true, Some(false)) => {175				Self::on_initialize_periodic_named_resolved(2)176					- Self::on_initialize_periodic_named_resolved(1)177			}178			(false, false, Some(true)) => Self::on_initialize(2) - Self::on_initialize(1),179			(false, true, Some(true)) => {180				Self::on_initialize_named_resolved(2) - Self::on_initialize_named_resolved(1)181			}182			(true, false, Some(true)) => {183				Self::on_initialize_periodic_resolved(2) - Self::on_initialize_periodic_resolved(1)184			}185			(true, true, Some(true)) => {186				Self::on_initialize_periodic_named_resolved(2)187					- Self::on_initialize_periodic_named_resolved(1)188			}189		}190	}191}192impl<T: WeightInfo> MarginalWeightInfo for T {}193194#[frame_support::pallet]195pub mod pallet {196	use super::*;197	use frame_support::{198		dispatch::PostDispatchInfo,199		pallet_prelude::*,200		traits::{201			schedule::{LookupError, LOWEST_PRIORITY},202			PreimageProvider,203		},204	};205	use frame_system::pallet_prelude::*;206207	/// The current storage version.208	const STORAGE_VERSION: StorageVersion = StorageVersion::new(3);209210	#[pallet::pallet]211	#[pallet::generate_store(pub(super) trait Store)]212	#[pallet::storage_version(STORAGE_VERSION)]213	#[pallet::without_storage_info]214	pub struct Pallet<T>(_);215216	/// `system::Config` should always be included in our implied traits.217	#[pallet::config]218	pub trait Config: frame_system::Config {219		/// The overarching event type.220		type RuntimeEvent: From<Event<Self>> + IsType<<Self as frame_system::Config>::RuntimeEvent>;221222		/// The aggregated origin which the dispatch will take.223		type RuntimeOrigin: OriginTrait<PalletsOrigin = Self::PalletsOrigin>224			+ From<Self::PalletsOrigin>225			+ IsType<<Self as system::Config>::RuntimeOrigin>;226227		/// The caller origin, overarching type of all pallets origins.228		type PalletsOrigin: From<system::RawOrigin<Self::AccountId>> + Codec + Clone + Eq + TypeInfo;229230		type Currency: NamedReservableCurrency<Self::AccountId, ReserveIdentifier = ScheduledId>;231232		/// The aggregated call type.233		type RuntimeCall: Parameter234			+ Dispatchable<Origin = <Self as Config>::RuntimeOrigin, PostInfo = PostDispatchInfo>235			+ UnfilteredDispatchable<Origin = <Self as system::Config>::RuntimeOrigin>236			+ GetDispatchInfo237			+ From<system::RuntimeCall<Self>>;238239		/// The maximum weight that may be scheduled per block for any dispatchables of less240		/// priority than `schedule::HARD_DEADLINE`.241		#[pallet::constant]242		type MaximumWeight: Get<Weight>;243244		/// Required origin to schedule or cancel calls.245		type ScheduleOrigin: EnsureOrigin<246			<Self as system::Config>::RuntimeOrigin,247			Success = ScheduledEnsureOriginSuccess<Self::AccountId>,248		>;249250		/// Required origin to set/change calls' priority.251		type PrioritySetOrigin: EnsureOrigin<<Self as system::Config>::RuntimeOrigin>;252253		/// Compare the privileges of origins.254		///255		/// This will be used when canceling a task, to ensure that the origin that tries256		/// to cancel has greater or equal privileges as the origin that created the scheduled task.257		///258		/// For simplicity the [`EqualPrivilegeOnly`](frame_support::traits::EqualPrivilegeOnly) can259		/// be used. This will only check if two given origins are equal.260		type OriginPrivilegeCmp: PrivilegeCmp<Self::PalletsOrigin>;261262		/// The maximum number of scheduled calls in the queue for a single block.263		/// Not strictly enforced, but used for weight estimation.264		#[pallet::constant]265		type MaxScheduledPerBlock: Get<u32>;266267		/// Weight information for extrinsics in this pallet.268		type WeightInfo: WeightInfo;269270		/// The preimage provider with which we look up call hashes to get the call.271		type PreimageProvider: PreimageProviderAndMaybeRecipient<Self::Hash>;272273		/// If `Some` then the number of blocks to postpone execution for when the item is delayed.274		type NoPreimagePostponement: Get<Option<Self::BlockNumber>>;275276		/// Sponsoring function.277		// type SponsorshipHandler: SponsorshipHandler<Self::AccountId, <Self as Config>::Call>;278279		/// The helper type used for custom transaction fee logic.280		type CallExecutor: DispatchCall<Self, H160>;281	}282283	/// A Scheduler-Runtime interface for finer payment handling.284	pub trait DispatchCall<T: frame_system::Config + Config, SelfContainedSignedInfo> {285		/// Reserve (lock) the maximum spendings on a call, calculated from its weight and the repetition count.286		fn reserve_balance(287			id: ScheduledId,288			sponsor: <T as frame_system::Config>::AccountId,289			call: <T as Config>::RuntimeCall,290			count: u32,291		) -> Result<(), DispatchError>;292293		/// Unreserve (unlock) a certain amount from the payer's reserved funds, returning the change.294		fn pay_for_call(295			id: ScheduledId,296			sponsor: <T as frame_system::Config>::AccountId,297			call: <T as Config>::RuntimeCall,298		) -> Result<u128, DispatchError>;299300		/// Resolve the call dispatch, including any post-dispatch operations.301		fn dispatch_call(302			signer: Option<T::AccountId>,303			function: <T as Config>::RuntimeCall,304		) -> Result<305			Result<PostDispatchInfo, DispatchErrorWithPostInfo<PostDispatchInfo>>,306			TransactionValidityError,307		>;308309		/// Release unspent reserved funds in case of a schedule cancel.310		fn cancel_reserve(311			id: ScheduledId,312			sponsor: <T as frame_system::Config>::AccountId,313		) -> Result<u128, DispatchError>;314	}315316	/// Items to be executed, indexed by the block number that they should be executed on.317	#[pallet::storage]318	pub type Agenda<T: Config> =319		StorageMap<_, Twox64Concat, T::BlockNumber, Vec<Option<ScheduledV3Of<T>>>, ValueQuery>;320321	/// Lookup from identity to the block number and index of the task.322	#[pallet::storage]323	pub(crate) type Lookup<T: Config> =324		StorageMap<_, Twox64Concat, ScheduledId, TaskAddress<T::BlockNumber>>;325326	/// Events type.327	#[pallet::event]328	#[pallet::generate_deposit(pub(super) fn deposit_event)]329	pub enum Event<T: Config> {330		/// Scheduled some task.331		Scheduled { when: T::BlockNumber, index: u32 },332		/// Canceled some task.333		Canceled { when: T::BlockNumber, index: u32 },334		/// Scheduled task's priority has changed335		PriorityChanged {336			when: T::BlockNumber,337			index: u32,338			priority: schedule::Priority,339		},340		/// Dispatched some task.341		Dispatched {342			task: TaskAddress<T::BlockNumber>,343			id: Option<ScheduledId>,344			result: DispatchResult,345		},346		/// The call for the provided hash was not found so the task has been aborted.347		CallLookupFailed {348			task: TaskAddress<T::BlockNumber>,349			id: Option<ScheduledId>,350			error: LookupError,351		},352	}353354	#[pallet::error]355	pub enum Error<T> {356		/// Failed to schedule a call357		FailedToSchedule,358		/// Cannot find the scheduled call.359		NotFound,360		/// Given target block number is in the past.361		TargetBlockNumberInPast,362		/// Reschedule failed because it does not change scheduled time.363		RescheduleNoChange,364	}365366	#[pallet::hooks]367	impl<T: Config> Hooks<BlockNumberFor<T>> for Pallet<T> {368		/// Execute the scheduled calls369		fn on_initialize(now: T::BlockNumber) -> Weight {370			let limit = T::MaximumWeight::get();371372			let mut queued = Agenda::<T>::take(now)373				.into_iter()374				.enumerate()375				.filter_map(|(index, s)| Some((index as u32, s?)))376				.collect::<Vec<_>>();377378			if queued.len() as u32 > T::MaxScheduledPerBlock::get() {379				log::warn!(380					target: "runtime::scheduler",381					"Warning: This block has more items queued in Scheduler than \382					expected from the runtime configuration. An update might be needed."383				);384			}385386			queued.sort_by_key(|(_, s)| s.priority);387388			let next = now + One::one();389390			let mut total_weight: Weight = T::WeightInfo::on_initialize(0);391			for (order, (index, mut s)) in queued.into_iter().enumerate() {392				let named = s.maybe_id.is_some();393394				let (call, maybe_completed) = s.call.resolved::<T::PreimageProvider>();395				s.call = call;396397				let resolved = if let Some(completed) = maybe_completed {398					T::PreimageProvider::unrequest_preimage(&completed);399					true400				} else {401					false402				};403				let call = match s.call.as_value().cloned() {404					Some(c) => c,405					None => {406						// Preimage not available - postpone until some block.407						total_weight.saturating_accrue(T::WeightInfo::item(false, named, None));408						if let Some(delay) = T::NoPreimagePostponement::get() {409							let until = now.saturating_add(delay);410							if let Some(ref id) = s.maybe_id {411								let index = Agenda::<T>::decode_len(until).unwrap_or(0);412								Lookup::<T>::insert(id, (until, index as u32));413							}414							Agenda::<T>::append(until, Some(s));415						} else if let Some(ref id) = s.maybe_id {416							Lookup::<T>::remove(id);417						}418						continue;419					}420				};421422				let periodic = s.maybe_periodic.is_some();423				let call_weight = call.get_dispatch_info().weight;424				let mut item_weight = T::WeightInfo::item(periodic, named, Some(resolved));425				let origin = <<T as Config>::RuntimeOrigin as From<T::PalletsOrigin>>::from(426					s.origin.clone(),427				)428				.into();429				if ensure_signed(origin).is_ok() {430					// Weights of Signed dispatches expect their signing account to be whitelisted.431					item_weight.saturating_accrue(T::DbWeight::get().reads_writes(1, 1));432				}433434				// We allow a scheduled call if any is true:435				// - It's priority is `HARD_DEADLINE`436				// - It does not push the weight past the limit.437				// - It is the first item in the schedule438				let hard_deadline = s.priority <= schedule::HARD_DEADLINE;439				let test_weight = total_weight440					.saturating_add(call_weight)441					.saturating_add(item_weight);442				if !hard_deadline && order > 0 && test_weight.all_gt(limit) {443					// Cannot be scheduled this block - postpone until next.444					total_weight.saturating_accrue(T::WeightInfo::item(false, named, None));445					if let Some(ref id) = s.maybe_id {446						// NOTE: We could reasonably not do this (in which case there would be one447						// block where the named and delayed item could not be referenced by name),448						// but we will do it anyway since it should be mostly free in terms of449						// weight and it is slightly cleaner.450						let index = Agenda::<T>::decode_len(next).unwrap_or(0);451						Lookup::<T>::insert(id, (next, index as u32));452					}453					Agenda::<T>::append(next, Some(s));454					continue;455				}456457				let scheduled_origin =458					<<T as Config>::RuntimeOrigin as From<T::PalletsOrigin>>::from(s.origin.clone());459				let ensured_origin =460					T::ScheduleOrigin::ensure_origin(scheduled_origin.into()).unwrap();461462				let r;463				let r = match ensured_origin {464					ScheduledEnsureOriginSuccess::Root => {465						r = Ok(call.dispatch_bypass_filter(frame_system::RawOrigin::Root.into()));466					}467					ScheduledEnsureOriginSuccess::Signed(sender) => {468						// Execute transaction via chain default pipeline469						// That means dispatch will be processed like any user's extrinsic e.g. transaction fees will be taken470						r = T::CallExecutor::dispatch_call(Some(sender), call.clone());471					}472					ScheduledEnsureOriginSuccess::Unsigned => {473						// Unsigned version of the above474						r = T::CallExecutor::dispatch_call(None, call.clone());475					}476				}477478				let mut actual_call_weight: Weight = item_weight;479				let result: Result<_, DispatchError> = match r {480					Ok(o) => match o {481						Ok(di) => {482							actual_call_weight = di.actual_weight.unwrap_or(item_weight);483							Ok(())484						}485						Err(err) => Err(err.error),486					},487					Err(_) => {488						log::error!(489							target: "runtime::scheduler",490							"Warning: Scheduler has failed to execute a post-dispatch transaction. \491							This block might have become invalid.");492						Err(DispatchError::CannotLookup)493					} // todo possibly force a skip/return here, do something with the error494				};495496				total_weight.saturating_accrue(item_weight);497				total_weight.saturating_accrue(actual_call_weight);498499				Self::deposit_event(Event::Dispatched {500					task: (now, index),501					id: s.maybe_id.clone(),502					result,503				});504505				if let &Some((period, count)) = &s.maybe_periodic {506					if count > 1 {507						s.maybe_periodic = Some((period, count - 1));508					} else {509						s.maybe_periodic = None;510					}511					let wake = now + period;512					let is_canceled;513514					// If scheduled is named, place its information in `Lookup`515					if let Some(ref id) = s.maybe_id {516						is_canceled = Lookup::<T>::get(id).is_none();517						let wake_index = Agenda::<T>::decode_len(wake).unwrap_or(0);518519						if !is_canceled {520							Lookup::<T>::insert(id, (wake, wake_index as u32));521						}522					} else {523						is_canceled = false;524					}525526					if !is_canceled {527						Agenda::<T>::append(wake, Some(s));528					}529				} else if let Some(ref id) = s.maybe_id {530					Lookup::<T>::remove(id);531				}532			}533			total_weight534		}535	}536537	#[pallet::call]538	impl<T: Config> Pallet<T> {539		/// Schedule a named task.540		#[pallet::weight(<T as Config>::WeightInfo::schedule_named(T::MaxScheduledPerBlock::get()))]541		pub fn schedule_named(542			origin: OriginFor<T>,543			id: ScheduledId,544			when: T::BlockNumber,545			maybe_periodic: Option<schedule::Period<T::BlockNumber>>,546			priority: Option<schedule::Priority>,547			call: Box<CallOrHashOf<T>>,548		) -> DispatchResult {549			T::ScheduleOrigin::ensure_origin(origin.clone())?;550551			if priority.is_some() {552				T::PrioritySetOrigin::ensure_origin(origin.clone())?;553			}554555			let origin = <T as Config>::RuntimeOrigin::from(origin);556			Self::do_schedule_named(557				id,558				DispatchTime::At(when),559				maybe_periodic,560				priority.unwrap_or(LOWEST_PRIORITY),561				origin.caller().clone(),562				*call,563			)?;564			Ok(())565		}566567		/// Cancel a named scheduled task.568		#[pallet::weight(<T as Config>::WeightInfo::cancel_named(T::MaxScheduledPerBlock::get()))]569		pub fn cancel_named(origin: OriginFor<T>, id: ScheduledId) -> DispatchResult {570			T::ScheduleOrigin::ensure_origin(origin.clone())?;571			let origin = <T as Config>::RuntimeOrigin::from(origin);572			Self::do_cancel_named(Some(origin.caller().clone()), id)?;573			Ok(())574		}575576		/// Schedule a named task after a delay.577		///578		/// # <weight>579		/// Same as [`schedule_named`](Self::schedule_named).580		/// # </weight>581		#[pallet::weight(<T as Config>::WeightInfo::schedule_named(T::MaxScheduledPerBlock::get()))]582		pub fn schedule_named_after(583			origin: OriginFor<T>,584			id: ScheduledId,585			after: T::BlockNumber,586			maybe_periodic: Option<schedule::Period<T::BlockNumber>>,587			priority: Option<schedule::Priority>,588			call: Box<CallOrHashOf<T>>,589		) -> DispatchResult {590			T::ScheduleOrigin::ensure_origin(origin.clone())?;591592			if priority.is_some() {593				T::PrioritySetOrigin::ensure_origin(origin.clone())?;594			}595596			let origin = <T as Config>::RuntimeOrigin::from(origin);597			Self::do_schedule_named(598				id,599				DispatchTime::After(after),600				maybe_periodic,601				priority.unwrap_or(LOWEST_PRIORITY),602				origin.caller().clone(),603				*call,604			)?;605			Ok(())606		}607608		#[pallet::weight(<T as Config>::WeightInfo::change_named_priority(T::MaxScheduledPerBlock::get()))]609		pub fn change_named_priority(610			origin: OriginFor<T>,611			id: ScheduledId,612			priority: schedule::Priority,613		) -> DispatchResult {614			T::PrioritySetOrigin::ensure_origin(origin.clone())?;615			let origin = <T as Config>::Origin::from(origin);616			Self::do_change_named_priority(origin.caller().clone(), id, priority)617		}618	}619}620621impl<T: Config> Pallet<T> {622	#[cfg(feature = "try-runtime")]623	pub fn pre_migrate_to_v3() -> Result<(), &'static str> {624		Ok(())625	}626627	#[cfg(feature = "try-runtime")]628	pub fn post_migrate_to_v3() -> Result<(), &'static str> {629		use frame_support::dispatch::GetStorageVersion;630631		assert!(Self::current_storage_version() == 3);632		for k in Agenda::<T>::iter_keys() {633			let _ = Agenda::<T>::try_get(k).map_err(|()| "Invalid item in Agenda")?;634		}635		Ok(())636	}637638	/// Helper to migrate scheduler when the pallet origin type has changed.639	pub fn migrate_origin<OldOrigin: Into<T::PalletsOrigin> + codec::Decode>() {640		Agenda::<T>::translate::<641			Vec<Option<Scheduled<CallOrHashOf<T>, T::BlockNumber, OldOrigin, T::AccountId>>>,642			_,643		>(|_, agenda| {644			Some(645				agenda646					.into_iter()647					.map(|schedule| {648						schedule.map(|schedule| Scheduled {649							maybe_id: schedule.maybe_id,650							priority: schedule.priority,651							call: schedule.call,652							maybe_periodic: schedule.maybe_periodic,653							origin: schedule.origin.into(),654							_phantom: Default::default(),655						})656					})657					.collect::<Vec<_>>(),658			)659		});660	}661662	fn resolve_time(when: DispatchTime<T::BlockNumber>) -> Result<T::BlockNumber, DispatchError> {663		let now = frame_system::Pallet::<T>::block_number();664665		let when = match when {666			DispatchTime::At(x) => x,667			// The current block has already completed it's scheduled tasks, so668			// Schedule the task at lest one block after this current block.669			DispatchTime::After(x) => now.saturating_add(x).saturating_add(One::one()),670		};671672		if when <= now {673			return Err(Error::<T>::TargetBlockNumberInPast.into());674		}675676		Ok(when)677	}678679	fn do_schedule_named(680		id: ScheduledId,681		when: DispatchTime<T::BlockNumber>,682		maybe_periodic: Option<schedule::Period<T::BlockNumber>>,683		priority: schedule::Priority,684		origin: T::PalletsOrigin,685		call: CallOrHashOf<T>,686	) -> Result<TaskAddress<T::BlockNumber>, DispatchError> {687		// ensure id it is unique688		if Lookup::<T>::contains_key(&id) {689			return Err(Error::<T>::FailedToSchedule)?;690		}691692		let when = Self::resolve_time(when)?;693694		call.ensure_requested::<T::PreimageProvider>();695696		// sanitize maybe_periodic697		let maybe_periodic = maybe_periodic698			.filter(|p| p.1 > 1 && !p.0.is_zero())699			// Remove one from the number of repetitions since we will schedule one now.700			.map(|(p, c)| (p, c - 1));701702		let s = Scheduled {703			maybe_id: Some(id.clone()),704			priority,705			call: call.clone(),706			maybe_periodic,707			origin: origin.clone(),708			_phantom: Default::default(),709		};710711		// reserve balance for periodic execution712		// let sender =713		// 	ensure_signed(<<T as Config>::Origin as From<T::PalletsOrigin>>::from(origin).into())?;714		// let repeats = match maybe_periodic {715		// 	Some(p) => p.1,716		// 	None => 1,717		// };718		// let _ = T::CallExecutor::reserve_balance(719		// 	id.clone(),720		// 	sender,721		// 	call.as_value().unwrap().clone(),722		// 	repeats,723		// );724725		Agenda::<T>::append(when, Some(s));726		let index = Agenda::<T>::decode_len(when).unwrap_or(1) as u32 - 1;727		let address = (when, index);728		Lookup::<T>::insert(&id, &address);729		Self::deposit_event(Event::Scheduled { when, index });730731		Ok(address)732	}733734	fn do_cancel_named(origin: Option<T::PalletsOrigin>, id: ScheduledId) -> DispatchResult {735		Lookup::<T>::try_mutate_exists(id, |lookup| -> DispatchResult {736			if let Some((when, index)) = lookup.take() {737				let i = index as usize;738				Agenda::<T>::try_mutate(when, |agenda| -> DispatchResult {739					if let Some(s) = agenda.get_mut(i) {740						if let (Some(ref o), Some(ref s)) = (origin.clone(), s.borrow()) {741							if matches!(742								T::OriginPrivilegeCmp::cmp_privilege(o, &s.origin),743								Some(Ordering::Less) | None744							) {745								return Err(BadOrigin.into());746							}747							// release balance reserve748							// let sender = ensure_signed(749							// 	<<T as Config>::Origin as From<T::PalletsOrigin>>::from(750							// 		origin.unwrap(),751							// 	)752							// 	.into(),753							// )?;754							// let _ = T::CallExecutor::cancel_reserve(id, sender);755756							s.call.ensure_unrequested::<T::PreimageProvider>();757						}758						*s = None;759					}760					Ok(())761				})?;762763				Self::deposit_event(Event::Canceled { when, index });764				Ok(())765			} else {766				Err(Error::<T>::NotFound)?767			}768		})769	}770771	fn do_change_named_priority(772		origin: T::PalletsOrigin,773		id: ScheduledId,774		priority: schedule::Priority,775	) -> DispatchResult {776		match Lookup::<T>::get(id) {777			Some((when, index)) => {778				let i = index as usize;779				Agenda::<T>::try_mutate(when, |agenda| {780					if let Some(Some(s)) = agenda.get_mut(i) {781						if matches!(782							T::OriginPrivilegeCmp::cmp_privilege(&origin, &s.origin),783							Some(Ordering::Less) | None784						) {785							return Err(BadOrigin.into());786						}787788						s.priority = priority;789						Self::deposit_event(Event::PriorityChanged {790							when,791							index,792							priority,793						});794					}795					Ok(())796				})797			}798			None => Err(Error::<T>::NotFound.into()),799		}800	}801}