git.delta.rocks / unique-network / refs/commits / fcb2b324d1ba

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::{schedule::{LookupError, LOWEST_PRIORITY}, PreimageProvider},201	};202	use frame_system::pallet_prelude::*;203204	/// The current storage version.205	const STORAGE_VERSION: StorageVersion = StorageVersion::new(3);206207	#[pallet::pallet]208	#[pallet::generate_store(pub(super) trait Store)]209	#[pallet::storage_version(STORAGE_VERSION)]210	#[pallet::without_storage_info]211	pub struct Pallet<T>(_);212213	/// `system::Config` should always be included in our implied traits.214	#[pallet::config]215	pub trait Config: frame_system::Config {216		/// The overarching event type.217		type RuntimeEvent: From<Event<Self>> + IsType<<Self as frame_system::Config>::RuntimeEvent>;218219		/// The aggregated origin which the dispatch will take.220		type RuntimeOrigin: OriginTrait<PalletsOrigin = Self::PalletsOrigin>221			+ From<Self::PalletsOrigin>222			+ IsType<<Self as system::Config>::RuntimeOrigin>;223224		/// The caller origin, overarching type of all pallets origins.225		type PalletsOrigin: From<system::RawOrigin<Self::AccountId>> + Codec + Clone + Eq + TypeInfo;226227		type Currency: NamedReservableCurrency<Self::AccountId, ReserveIdentifier = ScheduledId>;228229		/// The aggregated call type.230		type RuntimeCall: Parameter231			+ Dispatchable<Origin = <Self as Config>::RuntimeOrigin, PostInfo = PostDispatchInfo>232			+ UnfilteredDispatchable<Origin = <Self as system::Config>::RuntimeOrigin>233			+ GetDispatchInfo234			+ From<system::RuntimeCall<Self>>;235236		/// The maximum weight that may be scheduled per block for any dispatchables of less237		/// priority than `schedule::HARD_DEADLINE`.238		#[pallet::constant]239		type MaximumWeight: Get<Weight>;240241		/// Required origin to schedule or cancel calls.242		type ScheduleOrigin: EnsureOrigin<<Self as system::Config>::RuntimeOrigin, Success = ScheduledEnsureOriginSuccess<Self::AccountId>>;243244		/// Required origin to set/change calls' priority.245		type PrioritySetOrigin: EnsureOrigin<<Self as system::Config>::RuntimeOrigin>;246247		/// Compare the privileges of origins.248		///249		/// This will be used when canceling a task, to ensure that the origin that tries250		/// to cancel has greater or equal privileges as the origin that created the scheduled task.251		///252		/// For simplicity the [`EqualPrivilegeOnly`](frame_support::traits::EqualPrivilegeOnly) can253		/// be used. This will only check if two given origins are equal.254		type OriginPrivilegeCmp: PrivilegeCmp<Self::PalletsOrigin>;255256		/// The maximum number of scheduled calls in the queue for a single block.257		/// Not strictly enforced, but used for weight estimation.258		#[pallet::constant]259		type MaxScheduledPerBlock: Get<u32>;260261		/// Weight information for extrinsics in this pallet.262		type WeightInfo: WeightInfo;263264		/// The preimage provider with which we look up call hashes to get the call.265		type PreimageProvider: PreimageProviderAndMaybeRecipient<Self::Hash>;266267		/// If `Some` then the number of blocks to postpone execution for when the item is delayed.268		type NoPreimagePostponement: Get<Option<Self::BlockNumber>>;269270		/// Sponsoring function.271		// type SponsorshipHandler: SponsorshipHandler<Self::AccountId, <Self as Config>::Call>;272273		/// The helper type used for custom transaction fee logic.274		type CallExecutor: DispatchCall<Self, H160>;275	}276277	/// A Scheduler-Runtime interface for finer payment handling.278	pub trait DispatchCall<T: frame_system::Config + Config, SelfContainedSignedInfo> {279		/// Reserve (lock) the maximum spendings on a call, calculated from its weight and the repetition count.280		fn reserve_balance(281			id: ScheduledId,282			sponsor: <T as frame_system::Config>::AccountId,283			call: <T as Config>::RuntimeCall,284			count: u32,285		) -> Result<(), DispatchError>;286287		/// Unreserve (unlock) a certain amount from the payer's reserved funds, returning the change.288		fn pay_for_call(289			id: ScheduledId,290			sponsor: <T as frame_system::Config>::AccountId,291			call: <T as Config>::RuntimeCall,292		) -> Result<u128, DispatchError>;293294		/// Resolve the call dispatch, including any post-dispatch operations.295		fn dispatch_call(296			signer: Option<T::AccountId>,297			function: <T as Config>::RuntimeCall,298		) -> Result<299			Result<PostDispatchInfo, DispatchErrorWithPostInfo<PostDispatchInfo>>,300			TransactionValidityError,301		>;302303		/// Release unspent reserved funds in case of a schedule cancel.304		fn cancel_reserve(305			id: ScheduledId,306			sponsor: <T as frame_system::Config>::AccountId,307		) -> Result<u128, DispatchError>;308	}309310	/// Items to be executed, indexed by the block number that they should be executed on.311	#[pallet::storage]312	pub type Agenda<T: Config> =313		StorageMap<_, Twox64Concat, T::BlockNumber, Vec<Option<ScheduledV3Of<T>>>, ValueQuery>;314315	/// Lookup from identity to the block number and index of the task.316	#[pallet::storage]317	pub(crate) type Lookup<T: Config> =318		StorageMap<_, Twox64Concat, ScheduledId, TaskAddress<T::BlockNumber>>;319320	/// Events type.321	#[pallet::event]322	#[pallet::generate_deposit(pub(super) fn deposit_event)]323	pub enum Event<T: Config> {324		/// Scheduled some task.325		Scheduled { when: T::BlockNumber, index: u32 },326		/// Canceled some task.327		Canceled { when: T::BlockNumber, index: u32 },328		/// Scheduled task's priority has changed329		PriorityChanged { 330			when: T::BlockNumber,331			index: u32,332			priority: schedule::Priority,333		},334		/// Dispatched some task.335		Dispatched {336			task: TaskAddress<T::BlockNumber>,337			id: Option<ScheduledId>,338			result: DispatchResult,339		},340		/// The call for the provided hash was not found so the task has been aborted.341		CallLookupFailed {342			task: TaskAddress<T::BlockNumber>,343			id: Option<ScheduledId>,344			error: LookupError,345		},346	}347348	#[pallet::error]349	pub enum Error<T> {350		/// Failed to schedule a call351		FailedToSchedule,352		/// Cannot find the scheduled call.353		NotFound,354		/// Given target block number is in the past.355		TargetBlockNumberInPast,356		/// Reschedule failed because it does not change scheduled time.357		RescheduleNoChange,358	}359360	#[pallet::hooks]361	impl<T: Config> Hooks<BlockNumberFor<T>> for Pallet<T> {362		/// Execute the scheduled calls363		fn on_initialize(now: T::BlockNumber) -> Weight {364			let limit = T::MaximumWeight::get();365366			let mut queued = Agenda::<T>::take(now)367				.into_iter()368				.enumerate()369				.filter_map(|(index, s)| Some((index as u32, s?)))370				.collect::<Vec<_>>();371372			if queued.len() as u32 > T::MaxScheduledPerBlock::get() {373				log::warn!(374					target: "runtime::scheduler",375					"Warning: This block has more items queued in Scheduler than \376					expected from the runtime configuration. An update might be needed."377				);378			}379380			queued.sort_by_key(|(_, s)| s.priority);381382			let next = now + One::one();383384			let mut total_weight: Weight = T::WeightInfo::on_initialize(0);385			for (order, (index, mut s)) in queued.into_iter().enumerate() {386				let named = s.maybe_id.is_some();387388				let (call, maybe_completed) = s.call.resolved::<T::PreimageProvider>();389				s.call = call;390391				let resolved = if let Some(completed) = maybe_completed {392					T::PreimageProvider::unrequest_preimage(&completed);393					true394				} else {395					false396				};397				let call = match s.call.as_value().cloned() {398					Some(c) => c,399					None => {400						// Preimage not available - postpone until some block.401						total_weight.saturating_accrue(T::WeightInfo::item(false, named, None));402						if let Some(delay) = T::NoPreimagePostponement::get() {403							let until = now.saturating_add(delay);404							if let Some(ref id) = s.maybe_id {405								let index = Agenda::<T>::decode_len(until).unwrap_or(0);406								Lookup::<T>::insert(id, (until, index as u32));407							}408							Agenda::<T>::append(until, Some(s));409						}410						continue;411					}412				};413414				let periodic = s.maybe_periodic.is_some();415				let call_weight = call.get_dispatch_info().weight;416				let mut item_weight = T::WeightInfo::item(periodic, named, Some(resolved));417				let origin = <<T as Config>::RuntimeOrigin as From<T::PalletsOrigin>>::from(418					s.origin.clone(),419				)420				.into();421				if ensure_signed(origin).is_ok() {422					// Weights of Signed dispatches expect their signing account to be whitelisted.423					item_weight.saturating_accrue(T::DbWeight::get().reads_writes(1, 1));424				}425426				// We allow a scheduled call if any is true:427				// - It's priority is `HARD_DEADLINE`428				// - It does not push the weight past the limit.429				// - It is the first item in the schedule430				let hard_deadline = s.priority <= schedule::HARD_DEADLINE;431				let test_weight = total_weight432					.saturating_add(call_weight)433					.saturating_add(item_weight);434				if !hard_deadline && order > 0 && test_weight.all_gt(limit) {435					// Cannot be scheduled this block - postpone until next.436					total_weight.saturating_accrue(T::WeightInfo::item(false, named, None));437					if let Some(ref id) = s.maybe_id {438						// NOTE: We could reasonably not do this (in which case there would be one439						// block where the named and delayed item could not be referenced by name),440						// but we will do it anyway since it should be mostly free in terms of441						// weight and it is slightly cleaner.442						let index = Agenda::<T>::decode_len(next).unwrap_or(0);443						Lookup::<T>::insert(id, (next, index as u32));444					}445					Agenda::<T>::append(next, Some(s));446					continue;447				}448449				let scheduled_origin = <<T as Config>::RuntimeOrigin as From<T::PalletsOrigin>>::from(s.origin.clone());450				let ensured_origin = T::ScheduleOrigin::ensure_origin(scheduled_origin.into()).unwrap();451452				let r;453				match ensured_origin {454					ScheduledEnsureOriginSuccess::Root => {455						r = Ok(call.dispatch_bypass_filter(frame_system::RawOrigin::Root.into()));456					},457					ScheduledEnsureOriginSuccess::Signed(sender) => {458						// Execute transaction via chain default pipeline459						// That means dispatch will be processed like any user's extrinsic e.g. transaction fees will be taken460						r = T::CallExecutor::dispatch_call(Some(sender), call.clone());461					},462					ScheduledEnsureOriginSuccess::Unsigned => {463						// Unsigned version of the above464						r = T::CallExecutor::dispatch_call(None, call.clone());465					}466				}467468				let mut actual_call_weight: Weight = item_weight;469				let result: Result<_, DispatchError> = match r {470					Ok(o) => match o {471						Ok(di) => {472							actual_call_weight = di.actual_weight.unwrap_or(item_weight);473							Ok(())474						}475						Err(err) => Err(err.error),476					},477					Err(_) => {478						log::error!(479							target: "runtime::scheduler",480							"Warning: Scheduler has failed to execute a post-dispatch transaction. \481							This block might have become invalid.");482						Err(DispatchError::CannotLookup)483					} // todo possibly force a skip/return here, do something with the error484				};485486				total_weight.saturating_accrue(item_weight);487				total_weight.saturating_accrue(actual_call_weight);488489				Self::deposit_event(Event::Dispatched {490					task: (now, index),491					id: s.maybe_id.clone(),492					result,493				});494495				if let &Some((period, count)) = &s.maybe_periodic {496					if count > 1 {497						s.maybe_periodic = Some((period, count - 1));498					} else {499						s.maybe_periodic = None;500					}501					let wake = now + period;502					let is_canceled;503504					// If scheduled is named, place its information in `Lookup`505					if let Some(ref id) = s.maybe_id {506						is_canceled = Lookup::<T>::get(id).is_none();507						let wake_index = Agenda::<T>::decode_len(wake).unwrap_or(0);508509						if !is_canceled {510							Lookup::<T>::insert(id, (wake, wake_index as u32));511						}512					} else {513						is_canceled = false;514					}515516					if !is_canceled {517						Agenda::<T>::append(wake, Some(s));518					}519				} else if let Some(ref id) = s.maybe_id {520					Lookup::<T>::remove(id);521				}522			}523			total_weight524		}525	}526527	#[pallet::call]528	impl<T: Config> Pallet<T> {529		/// Schedule a named task.530		#[pallet::weight(<T as Config>::WeightInfo::schedule_named(T::MaxScheduledPerBlock::get()))]531		pub fn schedule_named(532			origin: OriginFor<T>,533			id: ScheduledId,534			when: T::BlockNumber,535			maybe_periodic: Option<schedule::Period<T::BlockNumber>>,536			priority: Option<schedule::Priority>,537			call: Box<CallOrHashOf<T>>,538		) -> DispatchResult {539			T::ScheduleOrigin::ensure_origin(origin.clone())?;540541			if priority.is_some() {542				T::PrioritySetOrigin::ensure_origin(origin.clone())?;543			}544545			let origin = <T as Config>::RuntimeOrigin::from(origin);546			Self::do_schedule_named(547				id,548				DispatchTime::At(when),549				maybe_periodic,550				priority.unwrap_or(LOWEST_PRIORITY),551				origin.caller().clone(),552				*call,553			)?;554			Ok(())555		}556557		/// Cancel a named scheduled task.558		#[pallet::weight(<T as Config>::WeightInfo::cancel_named(T::MaxScheduledPerBlock::get()))]559		pub fn cancel_named(origin: OriginFor<T>, id: ScheduledId) -> DispatchResult {560			T::ScheduleOrigin::ensure_origin(origin.clone())?;561			let origin = <T as Config>::RuntimeOrigin::from(origin);562			Self::do_cancel_named(Some(origin.caller().clone()), id)?;563			Ok(())564		}565566		/// Schedule a named task after a delay.567		///568		/// # <weight>569		/// Same as [`schedule_named`](Self::schedule_named).570		/// # </weight>571		#[pallet::weight(<T as Config>::WeightInfo::schedule_named(T::MaxScheduledPerBlock::get()))]572		pub fn schedule_named_after(573			origin: OriginFor<T>,574			id: ScheduledId,575			after: T::BlockNumber,576			maybe_periodic: Option<schedule::Period<T::BlockNumber>>,577			priority: Option<schedule::Priority>,578			call: Box<CallOrHashOf<T>>,579		) -> DispatchResult {580			T::ScheduleOrigin::ensure_origin(origin.clone())?;581582			if priority.is_some() {583				T::PrioritySetOrigin::ensure_origin(origin.clone())?;584			}585586			let origin = <T as Config>::RuntimeOrigin::from(origin);587			Self::do_schedule_named(588				id,589				DispatchTime::After(after),590				maybe_periodic,591				priority.unwrap_or(LOWEST_PRIORITY),592				origin.caller().clone(),593				*call,594			)?;595			Ok(())596		}597598		#[pallet::weight(<T as Config>::WeightInfo::change_named_priority(T::MaxScheduledPerBlock::get()))]599		pub fn change_named_priority(600			origin: OriginFor<T>,601			id: ScheduledId,602			priority: schedule::Priority,603		) -> DispatchResult {604			T::PrioritySetOrigin::ensure_origin(origin.clone())?;605			let origin = <T as Config>::Origin::from(origin);606			Self::do_change_named_priority(origin.caller().clone(), id, priority)607		}608	}609}610611impl<T: Config> Pallet<T> {612	#[cfg(feature = "try-runtime")]613	pub fn pre_migrate_to_v3() -> Result<(), &'static str> {614		Ok(())615	}616617	#[cfg(feature = "try-runtime")]618	pub fn post_migrate_to_v3() -> Result<(), &'static str> {619		use frame_support::dispatch::GetStorageVersion;620621		assert!(Self::current_storage_version() == 3);622		for k in Agenda::<T>::iter_keys() {623			let _ = Agenda::<T>::try_get(k).map_err(|()| "Invalid item in Agenda")?;624		}625		Ok(())626	}627628	/// Helper to migrate scheduler when the pallet origin type has changed.629	pub fn migrate_origin<OldOrigin: Into<T::PalletsOrigin> + codec::Decode>() {630		Agenda::<T>::translate::<631			Vec<Option<Scheduled<CallOrHashOf<T>, T::BlockNumber, OldOrigin, T::AccountId>>>,632			_,633		>(|_, agenda| {634			Some(635				agenda636					.into_iter()637					.map(|schedule| {638						schedule.map(|schedule| Scheduled {639							maybe_id: schedule.maybe_id,640							priority: schedule.priority,641							call: schedule.call,642							maybe_periodic: schedule.maybe_periodic,643							origin: schedule.origin.into(),644							_phantom: Default::default(),645						})646					})647					.collect::<Vec<_>>(),648			)649		});650	}651652	fn resolve_time(when: DispatchTime<T::BlockNumber>) -> Result<T::BlockNumber, DispatchError> {653		let now = frame_system::Pallet::<T>::block_number();654655		let when = match when {656			DispatchTime::At(x) => x,657			// The current block has already completed it's scheduled tasks, so658			// Schedule the task at lest one block after this current block.659			DispatchTime::After(x) => now.saturating_add(x).saturating_add(One::one()),660		};661662		if when <= now {663			return Err(Error::<T>::TargetBlockNumberInPast.into());664		}665666		Ok(when)667	}668669	fn do_schedule_named(670		id: ScheduledId,671		when: DispatchTime<T::BlockNumber>,672		maybe_periodic: Option<schedule::Period<T::BlockNumber>>,673		priority: schedule::Priority,674		origin: T::PalletsOrigin,675		call: CallOrHashOf<T>,676	) -> Result<TaskAddress<T::BlockNumber>, DispatchError> {677		// ensure id it is unique678		if Lookup::<T>::contains_key(&id) {679			return Err(Error::<T>::FailedToSchedule)?;680		}681682		let when = Self::resolve_time(when)?;683684		call.ensure_requested::<T::PreimageProvider>();685686		// sanitize maybe_periodic687		let maybe_periodic = maybe_periodic688			.filter(|p| p.1 > 1 && !p.0.is_zero())689			// Remove one from the number of repetitions since we will schedule one now.690			.map(|(p, c)| (p, c - 1));691692		let s = Scheduled {693			maybe_id: Some(id.clone()),694			priority,695			call: call.clone(),696			maybe_periodic,697			origin: origin.clone(),698			_phantom: Default::default(),699		};700701		// reserve balance for periodic execution702		// let sender =703		// 	ensure_signed(<<T as Config>::Origin as From<T::PalletsOrigin>>::from(origin).into())?;704		// let repeats = match maybe_periodic {705		// 	Some(p) => p.1,706		// 	None => 1,707		// };708		// let _ = T::CallExecutor::reserve_balance(709		// 	id.clone(),710		// 	sender,711		// 	call.as_value().unwrap().clone(),712		// 	repeats,713		// );714715		Agenda::<T>::append(when, Some(s));716		let index = Agenda::<T>::decode_len(when).unwrap_or(1) as u32 - 1;717		let address = (when, index);718		Lookup::<T>::insert(&id, &address);719		Self::deposit_event(Event::Scheduled { when, index });720721		Ok(address)722	}723724	fn do_cancel_named(origin: Option<T::PalletsOrigin>, id: ScheduledId) -> DispatchResult {725		Lookup::<T>::try_mutate_exists(id, |lookup| -> DispatchResult {726			if let Some((when, index)) = lookup.take() {727				let i = index as usize;728				Agenda::<T>::try_mutate(when, |agenda| -> DispatchResult {729					if let Some(s) = agenda.get_mut(i) {730						if let (Some(ref o), Some(ref s)) = (origin.clone(), s.borrow()) {731							if matches!(732								T::OriginPrivilegeCmp::cmp_privilege(o, &s.origin),733								Some(Ordering::Less) | None734							) {735								return Err(BadOrigin.into());736							}737							// release balance reserve738							// let sender = ensure_signed(739							// 	<<T as Config>::Origin as From<T::PalletsOrigin>>::from(740							// 		origin.unwrap(),741							// 	)742							// 	.into(),743							// )?;744							// let _ = T::CallExecutor::cancel_reserve(id, sender);745746							s.call.ensure_unrequested::<T::PreimageProvider>();747						}748						*s = None;749					}750					Ok(())751				})?;752753				Self::deposit_event(Event::Canceled { when, index });754				Ok(())755			} else {756				Err(Error::<T>::NotFound)?757			}758		})759	}760761	fn do_change_named_priority(762		origin: T::PalletsOrigin,763		id: ScheduledId,764		priority: schedule::Priority,765	) -> DispatchResult {766		match Lookup::<T>::get(id) {767			Some((when, index)) => {768				let i = index as usize;769				Agenda::<T>::try_mutate(when, |agenda| {770					if let Some(Some(s)) = agenda.get_mut(i) {771						if matches!(772							T::OriginPrivilegeCmp::cmp_privilege(&origin, &s.origin),773							Some(Ordering::Less) | None774						) {775							return Err(BadOrigin.into());776						}777778						s.priority = priority;779						Self::deposit_event(Event::PriorityChanged { when, index, priority });780					}781					Ok(())782				})783			},784			None => Err(Error::<T>::NotFound.into())785		}786	}787}