git.delta.rocks / unique-network / refs/commits / 71a39d07af30

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::{90		DispatchError, DispatchResult, Dispatchable, UnfilteredDispatchable, Parameter,91		GetDispatchInfo,92	},93	traits::{94		schedule::{self, DispatchTime, MaybeHashed},95		NamedReservableCurrency, EnsureOrigin, Get, IsType, OriginTrait, PrivilegeCmp,96		StorageVersion,97	},98	weights::{Weight},99};100101pub use weights::WeightInfo;102103/// The location of a scheduled task that can be used to remove it.104pub type TaskAddress<BlockNumber> = (BlockNumber, u32);105pub const MAX_TASK_ID_LENGTH_IN_BYTES: u8 = 16;106107pub type ScheduledId = [u8; MAX_TASK_ID_LENGTH_IN_BYTES as usize];108pub type CallOrHashOf<T> =109	MaybeHashed<<T as Config>::RuntimeCall, <T as frame_system::Config>::Hash>;110111/// Information regarding an item to be executed in the future.112#[cfg_attr(any(feature = "std", test), derive(PartialEq, Eq))]113#[derive(Clone, RuntimeDebug, Encode, Decode, TypeInfo)]114pub struct ScheduledV3<Call, BlockNumber, PalletsOrigin, AccountId> {115	/// The unique identity for this task, if there is one.116	maybe_id: Option<ScheduledId>,117	/// This task's priority.118	priority: schedule::Priority,119	/// The call to be dispatched.120	call: Call,121	/// If the call is periodic, then this points to the information concerning that.122	maybe_periodic: Option<schedule::Period<BlockNumber>>,123	/// The origin to dispatch the call.124	origin: PalletsOrigin,125	_phantom: PhantomData<AccountId>,126}127128pub type ScheduledV3Of<T> = ScheduledV3<129	CallOrHashOf<T>,130	<T as frame_system::Config>::BlockNumber,131	<T as Config>::PalletsOrigin,132	<T as frame_system::Config>::AccountId,133>;134135pub type ScheduledOf<T> = ScheduledV3Of<T>;136137/// The current version of Scheduled struct.138pub type Scheduled<Call, BlockNumber, PalletsOrigin, AccountId> =139	ScheduledV3<Call, BlockNumber, PalletsOrigin, AccountId>;140141pub enum ScheduledEnsureOriginSuccess<AccountId> {142	Root,143	Signed(AccountId),144}145146#[cfg(feature = "runtime-benchmarks")]147mod preimage_provider {148	use frame_support::traits::PreimageRecipient;149	pub trait PreimageProviderAndMaybeRecipient<H>: PreimageRecipient<H> {}150	impl<H, T: PreimageRecipient<H>> PreimageProviderAndMaybeRecipient<H> for T {}151}152153#[cfg(not(feature = "runtime-benchmarks"))]154mod preimage_provider {155	use frame_support::traits::PreimageProvider;156	pub trait PreimageProviderAndMaybeRecipient<H>: PreimageProvider<H> {}157	impl<H, T: PreimageProvider<H>> PreimageProviderAndMaybeRecipient<H> for T {}158}159160pub use preimage_provider::PreimageProviderAndMaybeRecipient;161162pub(crate) trait MarginalWeightInfo: WeightInfo {163	fn item(periodic: bool, named: bool, resolved: Option<bool>) -> Weight {164		match (periodic, named, resolved) {165			(_, false, None) => Self::on_initialize_aborted(2) - Self::on_initialize_aborted(1),166			(_, true, None) => {167				Self::on_initialize_named_aborted(2) - Self::on_initialize_named_aborted(1)168			}169			(false, false, Some(false)) => Self::on_initialize(2) - Self::on_initialize(1),170			(false, true, Some(false)) => {171				Self::on_initialize_named(2) - Self::on_initialize_named(1)172			}173			(true, false, Some(false)) => {174				Self::on_initialize_periodic(2) - Self::on_initialize_periodic(1)175			}176			(true, true, Some(false)) => {177				Self::on_initialize_periodic_named_resolved(2)178					- Self::on_initialize_periodic_named_resolved(1)179			}180			(false, false, Some(true)) => Self::on_initialize(2) - Self::on_initialize(1),181			(false, true, Some(true)) => {182				Self::on_initialize_named_resolved(2) - Self::on_initialize_named_resolved(1)183			}184			(true, false, Some(true)) => {185				Self::on_initialize_periodic_resolved(2) - Self::on_initialize_periodic_resolved(1)186			}187			(true, true, Some(true)) => {188				Self::on_initialize_periodic_named_resolved(2)189					- Self::on_initialize_periodic_named_resolved(1)190			}191		}192	}193}194impl<T: WeightInfo> MarginalWeightInfo for T {}195196#[frame_support::pallet]197pub mod pallet {198	use super::*;199	use frame_support::{200		dispatch::PostDispatchInfo,201		pallet_prelude::*,202		traits::{203			schedule::{LookupError, LOWEST_PRIORITY},204			PreimageProvider,205		},206	};207	use frame_system::pallet_prelude::*;208209	/// The current storage version.210	const STORAGE_VERSION: StorageVersion = StorageVersion::new(3);211212	#[pallet::pallet]213	#[pallet::generate_store(pub(super) trait Store)]214	#[pallet::storage_version(STORAGE_VERSION)]215	#[pallet::without_storage_info]216	pub struct Pallet<T>(_);217218	/// `system::Config` should always be included in our implied traits.219	#[pallet::config]220	pub trait Config: frame_system::Config {221		/// The overarching event type.222		type RuntimeEvent: From<Event<Self>> + IsType<<Self as frame_system::Config>::RuntimeEvent>;223224		/// The aggregated origin which the dispatch will take.225		type RuntimeOrigin: OriginTrait<PalletsOrigin = Self::PalletsOrigin>226			+ From<Self::PalletsOrigin>227			+ IsType<<Self as system::Config>::RuntimeOrigin>;228229		/// The caller origin, overarching type of all pallets origins.230		type PalletsOrigin: From<system::RawOrigin<Self::AccountId>> + Codec + Clone + Eq + TypeInfo;231232		type Currency: NamedReservableCurrency<Self::AccountId, ReserveIdentifier = ScheduledId>;233234		/// The aggregated call type.235		type RuntimeCall: Parameter236			+ Dispatchable<237				RuntimeOrigin = <Self as Config>::RuntimeOrigin,238				PostInfo = PostDispatchInfo,239			> + UnfilteredDispatchable<RuntimeOrigin = <Self as system::Config>::RuntimeOrigin>240			+ GetDispatchInfo241			+ From<system::Call<Self>>;242243		/// The maximum weight that may be scheduled per block for any dispatchables of less244		/// priority than `schedule::HARD_DEADLINE`.245		#[pallet::constant]246		type MaximumWeight: Get<Weight>;247248		/// Required origin to schedule or cancel calls.249		type ScheduleOrigin: EnsureOrigin<250			<Self as system::Config>::RuntimeOrigin,251			Success = ScheduledEnsureOriginSuccess<Self::AccountId>,252		>;253254		/// Required origin to set/change calls' priority.255		type PrioritySetOrigin: EnsureOrigin<<Self as system::Config>::RuntimeOrigin>;256257		/// Compare the privileges of origins.258		///259		/// This will be used when canceling a task, to ensure that the origin that tries260		/// to cancel has greater or equal privileges as the origin that created the scheduled task.261		///262		/// For simplicity the [`EqualPrivilegeOnly`](frame_support::traits::EqualPrivilegeOnly) can263		/// be used. This will only check if two given origins are equal.264		type OriginPrivilegeCmp: PrivilegeCmp<Self::PalletsOrigin>;265266		/// The maximum number of scheduled calls in the queue for a single block.267		/// Not strictly enforced, but used for weight estimation.268		#[pallet::constant]269		type MaxScheduledPerBlock: Get<u32>;270271		/// Weight information for extrinsics in this pallet.272		type WeightInfo: WeightInfo;273274		/// The preimage provider with which we look up call hashes to get the call.275		type PreimageProvider: PreimageProviderAndMaybeRecipient<Self::Hash>;276277		/// If `Some` then the number of blocks to postpone execution for when the item is delayed.278		type NoPreimagePostponement: Get<Option<Self::BlockNumber>>;279280		/// Sponsoring function.281		// type SponsorshipHandler: SponsorshipHandler<Self::AccountId, <Self as Config>::Call>;282283		/// The helper type used for custom transaction fee logic.284		type CallExecutor: DispatchCall<Self, H160>;285	}286287	/// A Scheduler-Runtime interface for finer payment handling.288	pub trait DispatchCall<T: frame_system::Config + Config, SelfContainedSignedInfo> {289		/// Reserve (lock) the maximum spendings on a call, calculated from its weight and the repetition count.290		fn reserve_balance(291			id: ScheduledId,292			sponsor: <T as frame_system::Config>::AccountId,293			call: <T as Config>::RuntimeCall,294			count: u32,295		) -> Result<(), DispatchError>;296297		/// Unreserve (unlock) a certain amount from the payer's reserved funds, returning the change.298		fn pay_for_call(299			id: ScheduledId,300			sponsor: <T as frame_system::Config>::AccountId,301			call: <T as Config>::RuntimeCall,302		) -> Result<u128, DispatchError>;303304		/// Resolve the call dispatch, including any post-dispatch operations.305		fn dispatch_call(306			signer: Option<T::AccountId>,307			function: <T as Config>::RuntimeCall,308		) -> Result<309			Result<PostDispatchInfo, DispatchErrorWithPostInfo<PostDispatchInfo>>,310			TransactionValidityError,311		>;312313		/// Release unspent reserved funds in case of a schedule cancel.314		fn cancel_reserve(315			id: ScheduledId,316			sponsor: <T as frame_system::Config>::AccountId,317		) -> Result<u128, DispatchError>;318	}319320	/// Items to be executed, indexed by the block number that they should be executed on.321	#[pallet::storage]322	pub type Agenda<T: Config> =323		StorageMap<_, Twox64Concat, T::BlockNumber, Vec<Option<ScheduledV3Of<T>>>, ValueQuery>;324325	/// Lookup from identity to the block number and index of the task.326	#[pallet::storage]327	pub(crate) type Lookup<T: Config> =328		StorageMap<_, Twox64Concat, ScheduledId, TaskAddress<T::BlockNumber>>;329330	/// Events type.331	#[pallet::event]332	#[pallet::generate_deposit(pub(super) fn deposit_event)]333	pub enum Event<T: Config> {334		/// Scheduled some task.335		Scheduled { when: T::BlockNumber, index: u32 },336		/// Canceled some task.337		Canceled { when: T::BlockNumber, index: u32 },338		/// Scheduled task's priority has changed339		PriorityChanged {340			when: T::BlockNumber,341			index: u32,342			priority: schedule::Priority,343		},344		/// Dispatched some task.345		Dispatched {346			task: TaskAddress<T::BlockNumber>,347			id: Option<ScheduledId>,348			result: DispatchResult,349		},350		/// The call for the provided hash was not found so the task has been aborted.351		CallLookupFailed {352			task: TaskAddress<T::BlockNumber>,353			id: Option<ScheduledId>,354			error: LookupError,355		},356	}357358	#[pallet::error]359	pub enum Error<T> {360		/// Failed to schedule a call361		FailedToSchedule,362		/// Cannot find the scheduled call.363		NotFound,364		/// Given target block number is in the past.365		TargetBlockNumberInPast,366		/// Reschedule failed because it does not change scheduled time.367		RescheduleNoChange,368	}369370	#[pallet::hooks]371	impl<T: Config> Hooks<BlockNumberFor<T>> for Pallet<T> {372		/// Execute the scheduled calls373		fn on_initialize(now: T::BlockNumber) -> Weight {374			let limit = T::MaximumWeight::get();375376			let mut queued = Agenda::<T>::take(now)377				.into_iter()378				.enumerate()379				.filter_map(|(index, s)| Some((index as u32, s?)))380				.collect::<Vec<_>>();381382			if queued.len() as u32 > T::MaxScheduledPerBlock::get() {383				log::warn!(384					target: "runtime::scheduler",385					"Warning: This block has more items queued in Scheduler than \386					expected from the runtime configuration. An update might be needed."387				);388			}389390			queued.sort_by_key(|(_, s)| s.priority);391392			let next = now + One::one();393394			let mut total_weight: Weight = T::WeightInfo::on_initialize(0);395			for (order, (index, mut s)) in queued.into_iter().enumerate() {396				let named = s.maybe_id.is_some();397398				let (call, maybe_completed) = s.call.resolved::<T::PreimageProvider>();399				s.call = call;400401				let resolved = if let Some(completed) = maybe_completed {402					T::PreimageProvider::unrequest_preimage(&completed);403					true404				} else {405					false406				};407				let call = match s.call.as_value().cloned() {408					Some(c) => c,409					None => {410						// Preimage not available - postpone until some block.411						total_weight.saturating_accrue(T::WeightInfo::item(false, named, None));412						if let Some(delay) = T::NoPreimagePostponement::get() {413							let until = now.saturating_add(delay);414							if let Some(ref id) = s.maybe_id {415								let index = Agenda::<T>::decode_len(until).unwrap_or(0);416								Lookup::<T>::insert(id, (until, index as u32));417							}418							Agenda::<T>::append(until, Some(s));419						} else if let Some(ref id) = s.maybe_id {420							Lookup::<T>::remove(id);421						}422						continue;423					}424				};425426				let periodic = s.maybe_periodic.is_some();427				let call_weight = call.get_dispatch_info().weight;428				let mut item_weight = T::WeightInfo::item(periodic, named, Some(resolved));429				let origin = <<T as Config>::RuntimeOrigin as From<T::PalletsOrigin>>::from(430					s.origin.clone(),431				)432				.into();433				if ensure_signed(origin).is_ok() {434					// Weights of Signed dispatches expect their signing account to be whitelisted.435					item_weight.saturating_accrue(T::DbWeight::get().reads_writes(1, 1));436				}437438				// We allow a scheduled call if any is true:439				// - It's priority is `HARD_DEADLINE`440				// - It does not push the weight past the limit.441				// - It is the first item in the schedule442				let hard_deadline = s.priority <= schedule::HARD_DEADLINE;443				let test_weight = total_weight444					.saturating_add(call_weight)445					.saturating_add(item_weight);446				if !hard_deadline && order > 0 && test_weight.all_gt(limit) {447					// Cannot be scheduled this block - postpone until next.448					total_weight.saturating_accrue(T::WeightInfo::item(false, named, None));449					if let Some(ref id) = s.maybe_id {450						// NOTE: We could reasonably not do this (in which case there would be one451						// block where the named and delayed item could not be referenced by name),452						// but we will do it anyway since it should be mostly free in terms of453						// weight and it is slightly cleaner.454						let index = Agenda::<T>::decode_len(next).unwrap_or(0);455						Lookup::<T>::insert(id, (next, index as u32));456					}457					Agenda::<T>::append(next, Some(s));458					continue;459				}460461				let scheduled_origin =462					<<T as Config>::RuntimeOrigin as From<T::PalletsOrigin>>::from(463						s.origin.clone(),464					);465				let ensured_origin = T::ScheduleOrigin::ensure_origin(scheduled_origin.into());466467				let r = match ensured_origin {468					Ok(ScheduledEnsureOriginSuccess::Root) => {469						Ok(call.dispatch_bypass_filter(frame_system::RawOrigin::Root.into()))470					}471					Ok(ScheduledEnsureOriginSuccess::Signed(sender)) => {472						// Execute transaction via chain default pipeline473						// That means dispatch will be processed like any user's extrinsic e.g. transaction fees will be taken474						T::CallExecutor::dispatch_call(Some(sender), call.clone())475					}476					Err(e) => Ok(Err(e.into())),477				};478479				let mut actual_call_weight: Weight = item_weight;480				let result: Result<_, DispatchError> = match r {481					Ok(o) => match o {482						Ok(di) => {483							actual_call_weight = di.actual_weight.unwrap_or(item_weight);484							Ok(())485						}486						Err(err) => Err(err.error),487					},488					Err(_) => {489						log::error!(490							target: "runtime::scheduler",491							"Warning: Scheduler has failed to execute a post-dispatch transaction. \492							This block might have become invalid.");493						Err(DispatchError::CannotLookup)494					} // todo possibly force a skip/return here, do something with the error495				};496497				total_weight.saturating_accrue(item_weight);498				total_weight.saturating_accrue(actual_call_weight);499500				Self::deposit_event(Event::Dispatched {501					task: (now, index),502					id: s.maybe_id.clone(),503					result,504				});505506				if let &Some((period, count)) = &s.maybe_periodic {507					if count > 1 {508						s.maybe_periodic = Some((period, count - 1));509					} else {510						s.maybe_periodic = None;511					}512					let wake = now + period;513					let is_canceled;514515					// If scheduled is named, place its information in `Lookup`516					if let Some(ref id) = s.maybe_id {517						is_canceled = Lookup::<T>::get(id).is_none();518						let wake_index = Agenda::<T>::decode_len(wake).unwrap_or(0);519520						if !is_canceled {521							Lookup::<T>::insert(id, (wake, wake_index as u32));522						}523					} else {524						is_canceled = false;525					}526527					if !is_canceled {528						Agenda::<T>::append(wake, Some(s));529					}530				} else if let Some(ref id) = s.maybe_id {531					Lookup::<T>::remove(id);532				}533			}534			total_weight535		}536	}537538	#[pallet::call]539	impl<T: Config> Pallet<T> {540		/// Schedule a named task.541		#[pallet::weight(<T as Config>::WeightInfo::schedule_named(T::MaxScheduledPerBlock::get()))]542		pub fn schedule_named(543			origin: OriginFor<T>,544			id: ScheduledId,545			when: T::BlockNumber,546			maybe_periodic: Option<schedule::Period<T::BlockNumber>>,547			priority: Option<schedule::Priority>,548			call: Box<CallOrHashOf<T>>,549		) -> DispatchResult {550			T::ScheduleOrigin::ensure_origin(origin.clone())?;551552			if priority.is_some() {553				T::PrioritySetOrigin::ensure_origin(origin.clone())?;554			}555556			let origin = <T as Config>::RuntimeOrigin::from(origin);557			Self::do_schedule_named(558				id,559				DispatchTime::At(when),560				maybe_periodic,561				priority.unwrap_or(LOWEST_PRIORITY),562				origin.caller().clone(),563				*call,564			)?;565			Ok(())566		}567568		/// Cancel a named scheduled task.569		#[pallet::weight(<T as Config>::WeightInfo::cancel_named(T::MaxScheduledPerBlock::get()))]570		pub fn cancel_named(origin: OriginFor<T>, id: ScheduledId) -> DispatchResult {571			T::ScheduleOrigin::ensure_origin(origin.clone())?;572			let origin = <T as Config>::RuntimeOrigin::from(origin);573			Self::do_cancel_named(Some(origin.caller().clone()), id)?;574			Ok(())575		}576577		/// Schedule a named task after a delay.578		///579		/// # <weight>580		/// Same as [`schedule_named`](Self::schedule_named).581		/// # </weight>582		#[pallet::weight(<T as Config>::WeightInfo::schedule_named(T::MaxScheduledPerBlock::get()))]583		pub fn schedule_named_after(584			origin: OriginFor<T>,585			id: ScheduledId,586			after: T::BlockNumber,587			maybe_periodic: Option<schedule::Period<T::BlockNumber>>,588			priority: Option<schedule::Priority>,589			call: Box<CallOrHashOf<T>>,590		) -> DispatchResult {591			T::ScheduleOrigin::ensure_origin(origin.clone())?;592593			if priority.is_some() {594				T::PrioritySetOrigin::ensure_origin(origin.clone())?;595			}596597			let origin = <T as Config>::RuntimeOrigin::from(origin);598			Self::do_schedule_named(599				id,600				DispatchTime::After(after),601				maybe_periodic,602				priority.unwrap_or(LOWEST_PRIORITY),603				origin.caller().clone(),604				*call,605			)?;606			Ok(())607		}608609		#[pallet::weight(<T as Config>::WeightInfo::change_named_priority(T::MaxScheduledPerBlock::get()))]610		pub fn change_named_priority(611			origin: OriginFor<T>,612			id: ScheduledId,613			priority: schedule::Priority,614		) -> DispatchResult {615			T::PrioritySetOrigin::ensure_origin(origin.clone())?;616			let origin = <T as Config>::RuntimeOrigin::from(origin);617			Self::do_change_named_priority(origin.caller().clone(), id, priority)618		}619	}620}621622impl<T: Config> Pallet<T> {623	#[cfg(feature = "try-runtime")]624	pub fn pre_migrate_to_v3() -> Result<(), &'static str> {625		Ok(())626	}627628	#[cfg(feature = "try-runtime")]629	pub fn post_migrate_to_v3() -> Result<(), &'static str> {630		use frame_support::dispatch::GetStorageVersion;631632		assert!(Self::current_storage_version() == 3);633		for k in Agenda::<T>::iter_keys() {634			let _ = Agenda::<T>::try_get(k).map_err(|()| "Invalid item in Agenda")?;635		}636		Ok(())637	}638639	/// Helper to migrate scheduler when the pallet origin type has changed.640	pub fn migrate_origin<OldOrigin: Into<T::PalletsOrigin> + codec::Decode>() {641		Agenda::<T>::translate::<642			Vec<Option<Scheduled<CallOrHashOf<T>, T::BlockNumber, OldOrigin, T::AccountId>>>,643			_,644		>(|_, agenda| {645			Some(646				agenda647					.into_iter()648					.map(|schedule| {649						schedule.map(|schedule| Scheduled {650							maybe_id: schedule.maybe_id,651							priority: schedule.priority,652							call: schedule.call,653							maybe_periodic: schedule.maybe_periodic,654							origin: schedule.origin.into(),655							_phantom: Default::default(),656						})657					})658					.collect::<Vec<_>>(),659			)660		});661	}662663	fn resolve_time(when: DispatchTime<T::BlockNumber>) -> Result<T::BlockNumber, DispatchError> {664		let now = frame_system::Pallet::<T>::block_number();665666		let when = match when {667			DispatchTime::At(x) => x,668			// The current block has already completed it's scheduled tasks, so669			// Schedule the task at lest one block after this current block.670			DispatchTime::After(x) => now.saturating_add(x).saturating_add(One::one()),671		};672673		if when <= now {674			return Err(Error::<T>::TargetBlockNumberInPast.into());675		}676677		Ok(when)678	}679680	fn do_schedule_named(681		id: ScheduledId,682		when: DispatchTime<T::BlockNumber>,683		maybe_periodic: Option<schedule::Period<T::BlockNumber>>,684		priority: schedule::Priority,685		origin: T::PalletsOrigin,686		call: CallOrHashOf<T>,687	) -> Result<TaskAddress<T::BlockNumber>, DispatchError> {688		// ensure id it is unique689		if Lookup::<T>::contains_key(&id) {690			return Err(Error::<T>::FailedToSchedule)?;691		}692693		let when = Self::resolve_time(when)?;694695		call.ensure_requested::<T::PreimageProvider>();696697		// sanitize maybe_periodic698		let maybe_periodic = maybe_periodic699			.filter(|p| p.1 > 1 && !p.0.is_zero())700			// Remove one from the number of repetitions since we will schedule one now.701			.map(|(p, c)| (p, c - 1));702703		let s = Scheduled {704			maybe_id: Some(id.clone()),705			priority,706			call: call.clone(),707			maybe_periodic,708			origin: origin.clone(),709			_phantom: Default::default(),710		};711712		// reserve balance for periodic execution713		// let sender =714		// 	ensure_signed(<<T as Config>::Origin as From<T::PalletsOrigin>>::from(origin).into())?;715		// let repeats = match maybe_periodic {716		// 	Some(p) => p.1,717		// 	None => 1,718		// };719		// let _ = T::CallExecutor::reserve_balance(720		// 	id.clone(),721		// 	sender,722		// 	call.as_value().unwrap().clone(),723		// 	repeats,724		// );725726		Agenda::<T>::append(when, Some(s));727		let index = Agenda::<T>::decode_len(when).unwrap_or(1) as u32 - 1;728		let address = (when, index);729		Lookup::<T>::insert(&id, &address);730		Self::deposit_event(Event::Scheduled { when, index });731732		Ok(address)733	}734735	fn do_cancel_named(origin: Option<T::PalletsOrigin>, id: ScheduledId) -> DispatchResult {736		Lookup::<T>::try_mutate_exists(id, |lookup| -> DispatchResult {737			if let Some((when, index)) = lookup.take() {738				let i = index as usize;739				Agenda::<T>::try_mutate(when, |agenda| -> DispatchResult {740					if let Some(s) = agenda.get_mut(i) {741						if let (Some(ref o), Some(ref s)) = (origin.clone(), s.borrow()) {742							if matches!(743								T::OriginPrivilegeCmp::cmp_privilege(o, &s.origin),744								Some(Ordering::Less) | None745							) {746								return Err(BadOrigin.into());747							}748							// release balance reserve749							// let sender = ensure_signed(750							// 	<<T as Config>::Origin as From<T::PalletsOrigin>>::from(751							// 		origin.unwrap(),752							// 	)753							// 	.into(),754							// )?;755							// let _ = T::CallExecutor::cancel_reserve(id, sender);756757							s.call.ensure_unrequested::<T::PreimageProvider>();758						}759						*s = None;760					}761					Ok(())762				})?;763764				Self::deposit_event(Event::Canceled { when, index });765				Ok(())766			} else {767				Err(Error::<T>::NotFound)?768			}769		})770	}771772	fn do_change_named_priority(773		origin: T::PalletsOrigin,774		id: ScheduledId,775		priority: schedule::Priority,776	) -> DispatchResult {777		match Lookup::<T>::get(id) {778			Some((when, index)) => {779				let i = index as usize;780				Agenda::<T>::try_mutate(when, |agenda| {781					if let Some(Some(s)) = agenda.get_mut(i) {782						if matches!(783							T::OriginPrivilegeCmp::cmp_privilege(&origin, &s.origin),784							Some(Ordering::Less) | None785						) {786							return Err(BadOrigin.into());787						}788789						s.priority = priority;790						Self::deposit_event(Event::PriorityChanged {791							when,792							index,793							priority,794						});795					}796					Ok(())797				})798			}799			None => Err(Error::<T>::NotFound.into()),800		}801	}802}