git.delta.rocks / unique-network / refs/commits / 4ce643d7d57f

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						}416						continue;417					}418				};419420				let periodic = s.maybe_periodic.is_some();421				let call_weight = call.get_dispatch_info().weight;422				let mut item_weight = T::WeightInfo::item(periodic, named, Some(resolved));423				let origin = <<T as Config>::RuntimeOrigin as From<T::PalletsOrigin>>::from(424					s.origin.clone(),425				)426				.into();427				if ensure_signed(origin).is_ok() {428					// Weights of Signed dispatches expect their signing account to be whitelisted.429					item_weight.saturating_accrue(T::DbWeight::get().reads_writes(1, 1));430				}431432				// We allow a scheduled call if any is true:433				// - It's priority is `HARD_DEADLINE`434				// - It does not push the weight past the limit.435				// - It is the first item in the schedule436				let hard_deadline = s.priority <= schedule::HARD_DEADLINE;437				let test_weight = total_weight438					.saturating_add(call_weight)439					.saturating_add(item_weight);440				if !hard_deadline && order > 0 && test_weight.all_gt(limit) {441					// Cannot be scheduled this block - postpone until next.442					total_weight.saturating_accrue(T::WeightInfo::item(false, named, None));443					if let Some(ref id) = s.maybe_id {444						// NOTE: We could reasonably not do this (in which case there would be one445						// block where the named and delayed item could not be referenced by name),446						// but we will do it anyway since it should be mostly free in terms of447						// weight and it is slightly cleaner.448						let index = Agenda::<T>::decode_len(next).unwrap_or(0);449						Lookup::<T>::insert(id, (next, index as u32));450					}451					Agenda::<T>::append(next, Some(s));452					continue;453				}454455				let scheduled_origin =456					<<T as Config>::RuntimeOrigin as From<T::PalletsOrigin>>::from(s.origin.clone());457				let ensured_origin =458					T::ScheduleOrigin::ensure_origin(scheduled_origin.into()).unwrap();459460				let r;461				match ensured_origin {462					ScheduledEnsureOriginSuccess::Root => {463						r = Ok(call.dispatch_bypass_filter(frame_system::RawOrigin::Root.into()));464					}465					ScheduledEnsureOriginSuccess::Signed(sender) => {466						// Execute transaction via chain default pipeline467						// That means dispatch will be processed like any user's extrinsic e.g. transaction fees will be taken468						r = T::CallExecutor::dispatch_call(Some(sender), call.clone());469					}470					ScheduledEnsureOriginSuccess::Unsigned => {471						// Unsigned version of the above472						r = T::CallExecutor::dispatch_call(None, call.clone());473					}474				}475476				let mut actual_call_weight: Weight = item_weight;477				let result: Result<_, DispatchError> = match r {478					Ok(o) => match o {479						Ok(di) => {480							actual_call_weight = di.actual_weight.unwrap_or(item_weight);481							Ok(())482						}483						Err(err) => Err(err.error),484					},485					Err(_) => {486						log::error!(487							target: "runtime::scheduler",488							"Warning: Scheduler has failed to execute a post-dispatch transaction. \489							This block might have become invalid.");490						Err(DispatchError::CannotLookup)491					} // todo possibly force a skip/return here, do something with the error492				};493494				total_weight.saturating_accrue(item_weight);495				total_weight.saturating_accrue(actual_call_weight);496497				Self::deposit_event(Event::Dispatched {498					task: (now, index),499					id: s.maybe_id.clone(),500					result,501				});502503				if let &Some((period, count)) = &s.maybe_periodic {504					if count > 1 {505						s.maybe_periodic = Some((period, count - 1));506					} else {507						s.maybe_periodic = None;508					}509					let wake = now + period;510					let is_canceled;511512					// If scheduled is named, place its information in `Lookup`513					if let Some(ref id) = s.maybe_id {514						is_canceled = Lookup::<T>::get(id).is_none();515						let wake_index = Agenda::<T>::decode_len(wake).unwrap_or(0);516517						if !is_canceled {518							Lookup::<T>::insert(id, (wake, wake_index as u32));519						}520					} else {521						is_canceled = false;522					}523524					if !is_canceled {525						Agenda::<T>::append(wake, Some(s));526					}527				} else if let Some(ref id) = s.maybe_id {528					Lookup::<T>::remove(id);529				}530			}531			total_weight532		}533	}534535	#[pallet::call]536	impl<T: Config> Pallet<T> {537		/// Schedule a named task.538		#[pallet::weight(<T as Config>::WeightInfo::schedule_named(T::MaxScheduledPerBlock::get()))]539		pub fn schedule_named(540			origin: OriginFor<T>,541			id: ScheduledId,542			when: T::BlockNumber,543			maybe_periodic: Option<schedule::Period<T::BlockNumber>>,544			priority: Option<schedule::Priority>,545			call: Box<CallOrHashOf<T>>,546		) -> DispatchResult {547			T::ScheduleOrigin::ensure_origin(origin.clone())?;548549			if priority.is_some() {550				T::PrioritySetOrigin::ensure_origin(origin.clone())?;551			}552553			let origin = <T as Config>::RuntimeOrigin::from(origin);554			Self::do_schedule_named(555				id,556				DispatchTime::At(when),557				maybe_periodic,558				priority.unwrap_or(LOWEST_PRIORITY),559				origin.caller().clone(),560				*call,561			)?;562			Ok(())563		}564565		/// Cancel a named scheduled task.566		#[pallet::weight(<T as Config>::WeightInfo::cancel_named(T::MaxScheduledPerBlock::get()))]567		pub fn cancel_named(origin: OriginFor<T>, id: ScheduledId) -> DispatchResult {568			T::ScheduleOrigin::ensure_origin(origin.clone())?;569			let origin = <T as Config>::RuntimeOrigin::from(origin);570			Self::do_cancel_named(Some(origin.caller().clone()), id)?;571			Ok(())572		}573574		/// Schedule a named task after a delay.575		///576		/// # <weight>577		/// Same as [`schedule_named`](Self::schedule_named).578		/// # </weight>579		#[pallet::weight(<T as Config>::WeightInfo::schedule_named(T::MaxScheduledPerBlock::get()))]580		pub fn schedule_named_after(581			origin: OriginFor<T>,582			id: ScheduledId,583			after: T::BlockNumber,584			maybe_periodic: Option<schedule::Period<T::BlockNumber>>,585			priority: Option<schedule::Priority>,586			call: Box<CallOrHashOf<T>>,587		) -> DispatchResult {588			T::ScheduleOrigin::ensure_origin(origin.clone())?;589590			if priority.is_some() {591				T::PrioritySetOrigin::ensure_origin(origin.clone())?;592			}593594			let origin = <T as Config>::RuntimeOrigin::from(origin);595			Self::do_schedule_named(596				id,597				DispatchTime::After(after),598				maybe_periodic,599				priority.unwrap_or(LOWEST_PRIORITY),600				origin.caller().clone(),601				*call,602			)?;603			Ok(())604		}605606		#[pallet::weight(<T as Config>::WeightInfo::change_named_priority(T::MaxScheduledPerBlock::get()))]607		pub fn change_named_priority(608			origin: OriginFor<T>,609			id: ScheduledId,610			priority: schedule::Priority,611		) -> DispatchResult {612			T::PrioritySetOrigin::ensure_origin(origin.clone())?;613			let origin = <T as Config>::Origin::from(origin);614			Self::do_change_named_priority(origin.caller().clone(), id, priority)615		}616	}617}618619impl<T: Config> Pallet<T> {620	#[cfg(feature = "try-runtime")]621	pub fn pre_migrate_to_v3() -> Result<(), &'static str> {622		Ok(())623	}624625	#[cfg(feature = "try-runtime")]626	pub fn post_migrate_to_v3() -> Result<(), &'static str> {627		use frame_support::dispatch::GetStorageVersion;628629		assert!(Self::current_storage_version() == 3);630		for k in Agenda::<T>::iter_keys() {631			let _ = Agenda::<T>::try_get(k).map_err(|()| "Invalid item in Agenda")?;632		}633		Ok(())634	}635636	/// Helper to migrate scheduler when the pallet origin type has changed.637	pub fn migrate_origin<OldOrigin: Into<T::PalletsOrigin> + codec::Decode>() {638		Agenda::<T>::translate::<639			Vec<Option<Scheduled<CallOrHashOf<T>, T::BlockNumber, OldOrigin, T::AccountId>>>,640			_,641		>(|_, agenda| {642			Some(643				agenda644					.into_iter()645					.map(|schedule| {646						schedule.map(|schedule| Scheduled {647							maybe_id: schedule.maybe_id,648							priority: schedule.priority,649							call: schedule.call,650							maybe_periodic: schedule.maybe_periodic,651							origin: schedule.origin.into(),652							_phantom: Default::default(),653						})654					})655					.collect::<Vec<_>>(),656			)657		});658	}659660	fn resolve_time(when: DispatchTime<T::BlockNumber>) -> Result<T::BlockNumber, DispatchError> {661		let now = frame_system::Pallet::<T>::block_number();662663		let when = match when {664			DispatchTime::At(x) => x,665			// The current block has already completed it's scheduled tasks, so666			// Schedule the task at lest one block after this current block.667			DispatchTime::After(x) => now.saturating_add(x).saturating_add(One::one()),668		};669670		if when <= now {671			return Err(Error::<T>::TargetBlockNumberInPast.into());672		}673674		Ok(when)675	}676677	fn do_schedule_named(678		id: ScheduledId,679		when: DispatchTime<T::BlockNumber>,680		maybe_periodic: Option<schedule::Period<T::BlockNumber>>,681		priority: schedule::Priority,682		origin: T::PalletsOrigin,683		call: CallOrHashOf<T>,684	) -> Result<TaskAddress<T::BlockNumber>, DispatchError> {685		// ensure id it is unique686		if Lookup::<T>::contains_key(&id) {687			return Err(Error::<T>::FailedToSchedule)?;688		}689690		let when = Self::resolve_time(when)?;691692		call.ensure_requested::<T::PreimageProvider>();693694		// sanitize maybe_periodic695		let maybe_periodic = maybe_periodic696			.filter(|p| p.1 > 1 && !p.0.is_zero())697			// Remove one from the number of repetitions since we will schedule one now.698			.map(|(p, c)| (p, c - 1));699700		let s = Scheduled {701			maybe_id: Some(id.clone()),702			priority,703			call: call.clone(),704			maybe_periodic,705			origin: origin.clone(),706			_phantom: Default::default(),707		};708709		// reserve balance for periodic execution710		// let sender =711		// 	ensure_signed(<<T as Config>::Origin as From<T::PalletsOrigin>>::from(origin).into())?;712		// let repeats = match maybe_periodic {713		// 	Some(p) => p.1,714		// 	None => 1,715		// };716		// let _ = T::CallExecutor::reserve_balance(717		// 	id.clone(),718		// 	sender,719		// 	call.as_value().unwrap().clone(),720		// 	repeats,721		// );722723		Agenda::<T>::append(when, Some(s));724		let index = Agenda::<T>::decode_len(when).unwrap_or(1) as u32 - 1;725		let address = (when, index);726		Lookup::<T>::insert(&id, &address);727		Self::deposit_event(Event::Scheduled { when, index });728729		Ok(address)730	}731732	fn do_cancel_named(origin: Option<T::PalletsOrigin>, id: ScheduledId) -> DispatchResult {733		Lookup::<T>::try_mutate_exists(id, |lookup| -> DispatchResult {734			if let Some((when, index)) = lookup.take() {735				let i = index as usize;736				Agenda::<T>::try_mutate(when, |agenda| -> DispatchResult {737					if let Some(s) = agenda.get_mut(i) {738						if let (Some(ref o), Some(ref s)) = (origin.clone(), s.borrow()) {739							if matches!(740								T::OriginPrivilegeCmp::cmp_privilege(o, &s.origin),741								Some(Ordering::Less) | None742							) {743								return Err(BadOrigin.into());744							}745							// release balance reserve746							// let sender = ensure_signed(747							// 	<<T as Config>::Origin as From<T::PalletsOrigin>>::from(748							// 		origin.unwrap(),749							// 	)750							// 	.into(),751							// )?;752							// let _ = T::CallExecutor::cancel_reserve(id, sender);753754							s.call.ensure_unrequested::<T::PreimageProvider>();755						}756						*s = None;757					}758					Ok(())759				})?;760761				Self::deposit_event(Event::Canceled { when, index });762				Ok(())763			} else {764				Err(Error::<T>::NotFound)?765			}766		})767	}768769	fn do_change_named_priority(770		origin: T::PalletsOrigin,771		id: ScheduledId,772		priority: schedule::Priority,773	) -> DispatchResult {774		match Lookup::<T>::get(id) {775			Some((when, index)) => {776				let i = index as usize;777				Agenda::<T>::try_mutate(when, |agenda| {778					if let Some(Some(s)) = agenda.get_mut(i) {779						if matches!(780							T::OriginPrivilegeCmp::cmp_privilege(&origin, &s.origin),781							Some(Ordering::Less) | None782						) {783							return Err(BadOrigin.into());784						}785786						s.priority = priority;787						Self::deposit_event(Event::PriorityChanged {788							when,789							index,790							priority,791						});792					}793					Ok(())794				})795			}796			None => Err(Error::<T>::NotFound.into()),797		}798	}799}