git.delta.rocks / unique-network / refs/commits / 50ceaa78c990

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	Unsigned,145}146147#[cfg(feature = "runtime-benchmarks")]148mod preimage_provider {149	use frame_support::traits::PreimageRecipient;150	pub trait PreimageProviderAndMaybeRecipient<H>: PreimageRecipient<H> {}151	impl<H, T: PreimageRecipient<H>> PreimageProviderAndMaybeRecipient<H> for T {}152}153154#[cfg(not(feature = "runtime-benchmarks"))]155mod preimage_provider {156	use frame_support::traits::PreimageProvider;157	pub trait PreimageProviderAndMaybeRecipient<H>: PreimageProvider<H> {}158	impl<H, T: PreimageProvider<H>> PreimageProviderAndMaybeRecipient<H> for T {}159}160161pub use preimage_provider::PreimageProviderAndMaybeRecipient;162163pub(crate) trait MarginalWeightInfo: WeightInfo {164	fn item(periodic: bool, named: bool, resolved: Option<bool>) -> Weight {165		match (periodic, named, resolved) {166			(_, false, None) => Self::on_initialize_aborted(2) - Self::on_initialize_aborted(1),167			(_, true, None) => {168				Self::on_initialize_named_aborted(2) - Self::on_initialize_named_aborted(1)169			}170			(false, false, Some(false)) => Self::on_initialize(2) - Self::on_initialize(1),171			(false, true, Some(false)) => {172				Self::on_initialize_named(2) - Self::on_initialize_named(1)173			}174			(true, false, Some(false)) => {175				Self::on_initialize_periodic(2) - Self::on_initialize_periodic(1)176			}177			(true, true, Some(false)) => {178				Self::on_initialize_periodic_named_resolved(2)179					- Self::on_initialize_periodic_named_resolved(1)180			}181			(false, false, Some(true)) => Self::on_initialize(2) - Self::on_initialize(1),182			(false, true, Some(true)) => {183				Self::on_initialize_named_resolved(2) - Self::on_initialize_named_resolved(1)184			}185			(true, false, Some(true)) => {186				Self::on_initialize_periodic_resolved(2) - Self::on_initialize_periodic_resolved(1)187			}188			(true, true, Some(true)) => {189				Self::on_initialize_periodic_named_resolved(2)190					- Self::on_initialize_periodic_named_resolved(1)191			}192		}193	}194}195impl<T: WeightInfo> MarginalWeightInfo for T {}196197#[frame_support::pallet]198pub mod pallet {199	use super::*;200	use frame_support::{201		dispatch::PostDispatchInfo,202		pallet_prelude::*,203		traits::{204			schedule::{LookupError, LOWEST_PRIORITY},205			PreimageProvider,206		},207	};208	use frame_system::pallet_prelude::*;209210	/// The current storage version.211	const STORAGE_VERSION: StorageVersion = StorageVersion::new(3);212213	#[pallet::pallet]214	#[pallet::generate_store(pub(super) trait Store)]215	#[pallet::storage_version(STORAGE_VERSION)]216	#[pallet::without_storage_info]217	pub struct Pallet<T>(_);218219	/// `system::Config` should always be included in our implied traits.220	#[pallet::config]221	pub trait Config: frame_system::Config {222		/// The overarching event type.223		type RuntimeEvent: From<Event<Self>> + IsType<<Self as frame_system::Config>::RuntimeEvent>;224225		/// The aggregated origin which the dispatch will take.226		type RuntimeOrigin: OriginTrait<PalletsOrigin = Self::PalletsOrigin>227			+ From<Self::PalletsOrigin>228			+ IsType<<Self as system::Config>::RuntimeOrigin>;229230		/// The caller origin, overarching type of all pallets origins.231		type PalletsOrigin: From<system::RawOrigin<Self::AccountId>> + Codec + Clone + Eq + TypeInfo;232233		type Currency: NamedReservableCurrency<Self::AccountId, ReserveIdentifier = ScheduledId>;234235		/// The aggregated call type.236		type RuntimeCall: Parameter237			+ Dispatchable<238				RuntimeOrigin = <Self as Config>::RuntimeOrigin,239				PostInfo = PostDispatchInfo,240			> + UnfilteredDispatchable<RuntimeOrigin = <Self as system::Config>::RuntimeOrigin>241			+ GetDispatchInfo242			+ From<system::Call<Self>>;243244		/// The maximum weight that may be scheduled per block for any dispatchables of less245		/// priority than `schedule::HARD_DEADLINE`.246		#[pallet::constant]247		type MaximumWeight: Get<Weight>;248249		/// Required origin to schedule or cancel calls.250		type ScheduleOrigin: EnsureOrigin<251			<Self as system::Config>::RuntimeOrigin,252			Success = ScheduledEnsureOriginSuccess<Self::AccountId>,253		>;254255		/// Required origin to set/change calls' priority.256		type PrioritySetOrigin: EnsureOrigin<<Self as system::Config>::RuntimeOrigin>;257258		/// Compare the privileges of origins.259		///260		/// This will be used when canceling a task, to ensure that the origin that tries261		/// to cancel has greater or equal privileges as the origin that created the scheduled task.262		///263		/// For simplicity the [`EqualPrivilegeOnly`](frame_support::traits::EqualPrivilegeOnly) can264		/// be used. This will only check if two given origins are equal.265		type OriginPrivilegeCmp: PrivilegeCmp<Self::PalletsOrigin>;266267		/// The maximum number of scheduled calls in the queue for a single block.268		/// Not strictly enforced, but used for weight estimation.269		#[pallet::constant]270		type MaxScheduledPerBlock: Get<u32>;271272		/// Weight information for extrinsics in this pallet.273		type WeightInfo: WeightInfo;274275		/// The preimage provider with which we look up call hashes to get the call.276		type PreimageProvider: PreimageProviderAndMaybeRecipient<Self::Hash>;277278		/// If `Some` then the number of blocks to postpone execution for when the item is delayed.279		type NoPreimagePostponement: Get<Option<Self::BlockNumber>>;280281		/// Sponsoring function.282		// type SponsorshipHandler: SponsorshipHandler<Self::AccountId, <Self as Config>::Call>;283284		/// The helper type used for custom transaction fee logic.285		type CallExecutor: DispatchCall<Self, H160>;286	}287288	/// A Scheduler-Runtime interface for finer payment handling.289	pub trait DispatchCall<T: frame_system::Config + Config, SelfContainedSignedInfo> {290		/// Reserve (lock) the maximum spendings on a call, calculated from its weight and the repetition count.291		fn reserve_balance(292			id: ScheduledId,293			sponsor: <T as frame_system::Config>::AccountId,294			call: <T as Config>::RuntimeCall,295			count: u32,296		) -> Result<(), DispatchError>;297298		/// Unreserve (unlock) a certain amount from the payer's reserved funds, returning the change.299		fn pay_for_call(300			id: ScheduledId,301			sponsor: <T as frame_system::Config>::AccountId,302			call: <T as Config>::RuntimeCall,303		) -> Result<u128, DispatchError>;304305		/// Resolve the call dispatch, including any post-dispatch operations.306		fn dispatch_call(307			signer: Option<T::AccountId>,308			function: <T as Config>::RuntimeCall,309		) -> Result<310			Result<PostDispatchInfo, DispatchErrorWithPostInfo<PostDispatchInfo>>,311			TransactionValidityError,312		>;313314		/// Release unspent reserved funds in case of a schedule cancel.315		fn cancel_reserve(316			id: ScheduledId,317			sponsor: <T as frame_system::Config>::AccountId,318		) -> Result<u128, DispatchError>;319	}320321	/// Items to be executed, indexed by the block number that they should be executed on.322	#[pallet::storage]323	pub type Agenda<T: Config> =324		StorageMap<_, Twox64Concat, T::BlockNumber, Vec<Option<ScheduledV3Of<T>>>, ValueQuery>;325326	/// Lookup from identity to the block number and index of the task.327	#[pallet::storage]328	pub(crate) type Lookup<T: Config> =329		StorageMap<_, Twox64Concat, ScheduledId, TaskAddress<T::BlockNumber>>;330331	/// Events type.332	#[pallet::event]333	#[pallet::generate_deposit(pub(super) fn deposit_event)]334	pub enum Event<T: Config> {335		/// Scheduled some task.336		Scheduled { when: T::BlockNumber, index: u32 },337		/// Canceled some task.338		Canceled { when: T::BlockNumber, index: u32 },339		/// Scheduled task's priority has changed340		PriorityChanged {341			when: T::BlockNumber,342			index: u32,343			priority: schedule::Priority,344		},345		/// Dispatched some task.346		Dispatched {347			task: TaskAddress<T::BlockNumber>,348			id: Option<ScheduledId>,349			result: DispatchResult,350		},351		/// The call for the provided hash was not found so the task has been aborted.352		CallLookupFailed {353			task: TaskAddress<T::BlockNumber>,354			id: Option<ScheduledId>,355			error: LookupError,356		},357	}358359	#[pallet::error]360	pub enum Error<T> {361		/// Failed to schedule a call362		FailedToSchedule,363		/// Cannot find the scheduled call.364		NotFound,365		/// Given target block number is in the past.366		TargetBlockNumberInPast,367		/// Reschedule failed because it does not change scheduled time.368		RescheduleNoChange,369	}370371	#[pallet::hooks]372	impl<T: Config> Hooks<BlockNumberFor<T>> for Pallet<T> {373		/// Execute the scheduled calls374		fn on_initialize(now: T::BlockNumber) -> Weight {375			let limit = T::MaximumWeight::get();376377			let mut queued = Agenda::<T>::take(now)378				.into_iter()379				.enumerate()380				.filter_map(|(index, s)| Some((index as u32, s?)))381				.collect::<Vec<_>>();382383			if queued.len() as u32 > T::MaxScheduledPerBlock::get() {384				log::warn!(385					target: "runtime::scheduler",386					"Warning: This block has more items queued in Scheduler than \387					expected from the runtime configuration. An update might be needed."388				);389			}390391			queued.sort_by_key(|(_, s)| s.priority);392393			let next = now + One::one();394395			let mut total_weight: Weight = T::WeightInfo::on_initialize(0);396			for (order, (index, mut s)) in queued.into_iter().enumerate() {397				let named = s.maybe_id.is_some();398399				let (call, maybe_completed) = s.call.resolved::<T::PreimageProvider>();400				s.call = call;401402				let resolved = if let Some(completed) = maybe_completed {403					T::PreimageProvider::unrequest_preimage(&completed);404					true405				} else {406					false407				};408				let call = match s.call.as_value().cloned() {409					Some(c) => c,410					None => {411						// Preimage not available - postpone until some block.412						total_weight.saturating_accrue(T::WeightInfo::item(false, named, None));413						if let Some(delay) = T::NoPreimagePostponement::get() {414							let until = now.saturating_add(delay);415							if let Some(ref id) = s.maybe_id {416								let index = Agenda::<T>::decode_len(until).unwrap_or(0);417								Lookup::<T>::insert(id, (until, index as u32));418							}419							Agenda::<T>::append(until, Some(s));420						} else if let Some(ref id) = s.maybe_id {421							Lookup::<T>::remove(id);422						}423						continue;424					}425				};426427				let periodic = s.maybe_periodic.is_some();428				let call_weight = call.get_dispatch_info().weight;429				let mut item_weight = T::WeightInfo::item(periodic, named, Some(resolved));430				let origin = <<T as Config>::RuntimeOrigin as From<T::PalletsOrigin>>::from(431					s.origin.clone(),432				)433				.into();434				if ensure_signed(origin).is_ok() {435					// Weights of Signed dispatches expect their signing account to be whitelisted.436					item_weight.saturating_accrue(T::DbWeight::get().reads_writes(1, 1));437				}438439				// We allow a scheduled call if any is true:440				// - It's priority is `HARD_DEADLINE`441				// - It does not push the weight past the limit.442				// - It is the first item in the schedule443				let hard_deadline = s.priority <= schedule::HARD_DEADLINE;444				let test_weight = total_weight445					.saturating_add(call_weight)446					.saturating_add(item_weight);447				if !hard_deadline && order > 0 && test_weight.all_gt(limit) {448					// Cannot be scheduled this block - postpone until next.449					total_weight.saturating_accrue(T::WeightInfo::item(false, named, None));450					if let Some(ref id) = s.maybe_id {451						// NOTE: We could reasonably not do this (in which case there would be one452						// block where the named and delayed item could not be referenced by name),453						// but we will do it anyway since it should be mostly free in terms of454						// weight and it is slightly cleaner.455						let index = Agenda::<T>::decode_len(next).unwrap_or(0);456						Lookup::<T>::insert(id, (next, index as u32));457					}458					Agenda::<T>::append(next, Some(s));459					continue;460				}461462				let scheduled_origin =463					<<T as Config>::RuntimeOrigin as From<T::PalletsOrigin>>::from(464						s.origin.clone(),465					);466				let ensured_origin = T::ScheduleOrigin::ensure_origin(scheduled_origin.into());467468				let r = match ensured_origin {469					Ok(ScheduledEnsureOriginSuccess::Root) => {470						Ok(call.dispatch_bypass_filter(frame_system::RawOrigin::Root.into()))471					}472					Ok(ScheduledEnsureOriginSuccess::Signed(sender)) => {473						// Execute transaction via chain default pipeline474						// That means dispatch will be processed like any user's extrinsic e.g. transaction fees will be taken475						T::CallExecutor::dispatch_call(Some(sender), call.clone())476					}477					Ok(ScheduledEnsureOriginSuccess::Unsigned) => {478						// Unsigned version of the above479						T::CallExecutor::dispatch_call(None, call.clone())480					}481					Err(e) => Ok(Err(e.into())),482				};483484				let mut actual_call_weight: Weight = item_weight;485				let result: Result<_, DispatchError> = match r {486					Ok(o) => match o {487						Ok(di) => {488							actual_call_weight = di.actual_weight.unwrap_or(item_weight);489							Ok(())490						}491						Err(err) => Err(err.error),492					},493					Err(_) => {494						log::error!(495							target: "runtime::scheduler",496							"Warning: Scheduler has failed to execute a post-dispatch transaction. \497							This block might have become invalid.");498						Err(DispatchError::CannotLookup)499					} // todo possibly force a skip/return here, do something with the error500				};501502				total_weight.saturating_accrue(item_weight);503				total_weight.saturating_accrue(actual_call_weight);504505				Self::deposit_event(Event::Dispatched {506					task: (now, index),507					id: s.maybe_id.clone(),508					result,509				});510511				if let &Some((period, count)) = &s.maybe_periodic {512					if count > 1 {513						s.maybe_periodic = Some((period, count - 1));514					} else {515						s.maybe_periodic = None;516					}517					let wake = now + period;518					let is_canceled;519520					// If scheduled is named, place its information in `Lookup`521					if let Some(ref id) = s.maybe_id {522						is_canceled = Lookup::<T>::get(id).is_none();523						let wake_index = Agenda::<T>::decode_len(wake).unwrap_or(0);524525						if !is_canceled {526							Lookup::<T>::insert(id, (wake, wake_index as u32));527						}528					} else {529						is_canceled = false;530					}531532					if !is_canceled {533						Agenda::<T>::append(wake, Some(s));534					}535				} else if let Some(ref id) = s.maybe_id {536					Lookup::<T>::remove(id);537				}538			}539			total_weight540		}541	}542543	#[pallet::call]544	impl<T: Config> Pallet<T> {545		/// Schedule a named task.546		#[pallet::weight(<T as Config>::WeightInfo::schedule_named(T::MaxScheduledPerBlock::get()))]547		pub fn schedule_named(548			origin: OriginFor<T>,549			id: ScheduledId,550			when: T::BlockNumber,551			maybe_periodic: Option<schedule::Period<T::BlockNumber>>,552			priority: Option<schedule::Priority>,553			call: Box<CallOrHashOf<T>>,554		) -> DispatchResult {555			T::ScheduleOrigin::ensure_origin(origin.clone())?;556557			if priority.is_some() {558				T::PrioritySetOrigin::ensure_origin(origin.clone())?;559			}560561			let origin = <T as Config>::RuntimeOrigin::from(origin);562			Self::do_schedule_named(563				id,564				DispatchTime::At(when),565				maybe_periodic,566				priority.unwrap_or(LOWEST_PRIORITY),567				origin.caller().clone(),568				*call,569			)?;570			Ok(())571		}572573		/// Cancel a named scheduled task.574		#[pallet::weight(<T as Config>::WeightInfo::cancel_named(T::MaxScheduledPerBlock::get()))]575		pub fn cancel_named(origin: OriginFor<T>, id: ScheduledId) -> DispatchResult {576			T::ScheduleOrigin::ensure_origin(origin.clone())?;577			let origin = <T as Config>::RuntimeOrigin::from(origin);578			Self::do_cancel_named(Some(origin.caller().clone()), id)?;579			Ok(())580		}581582		/// Schedule a named task after a delay.583		///584		/// # <weight>585		/// Same as [`schedule_named`](Self::schedule_named).586		/// # </weight>587		#[pallet::weight(<T as Config>::WeightInfo::schedule_named(T::MaxScheduledPerBlock::get()))]588		pub fn schedule_named_after(589			origin: OriginFor<T>,590			id: ScheduledId,591			after: T::BlockNumber,592			maybe_periodic: Option<schedule::Period<T::BlockNumber>>,593			priority: Option<schedule::Priority>,594			call: Box<CallOrHashOf<T>>,595		) -> DispatchResult {596			T::ScheduleOrigin::ensure_origin(origin.clone())?;597598			if priority.is_some() {599				T::PrioritySetOrigin::ensure_origin(origin.clone())?;600			}601602			let origin = <T as Config>::RuntimeOrigin::from(origin);603			Self::do_schedule_named(604				id,605				DispatchTime::After(after),606				maybe_periodic,607				priority.unwrap_or(LOWEST_PRIORITY),608				origin.caller().clone(),609				*call,610			)?;611			Ok(())612		}613614		#[pallet::weight(<T as Config>::WeightInfo::change_named_priority(T::MaxScheduledPerBlock::get()))]615		pub fn change_named_priority(616			origin: OriginFor<T>,617			id: ScheduledId,618			priority: schedule::Priority,619		) -> DispatchResult {620			T::PrioritySetOrigin::ensure_origin(origin.clone())?;621			let origin = <T as Config>::RuntimeOrigin::from(origin);622			Self::do_change_named_priority(origin.caller().clone(), id, priority)623		}624	}625}626627impl<T: Config> Pallet<T> {628	#[cfg(feature = "try-runtime")]629	pub fn pre_migrate_to_v3() -> Result<(), &'static str> {630		Ok(())631	}632633	#[cfg(feature = "try-runtime")]634	pub fn post_migrate_to_v3() -> Result<(), &'static str> {635		use frame_support::dispatch::GetStorageVersion;636637		assert!(Self::current_storage_version() == 3);638		for k in Agenda::<T>::iter_keys() {639			let _ = Agenda::<T>::try_get(k).map_err(|()| "Invalid item in Agenda")?;640		}641		Ok(())642	}643644	/// Helper to migrate scheduler when the pallet origin type has changed.645	pub fn migrate_origin<OldOrigin: Into<T::PalletsOrigin> + codec::Decode>() {646		Agenda::<T>::translate::<647			Vec<Option<Scheduled<CallOrHashOf<T>, T::BlockNumber, OldOrigin, T::AccountId>>>,648			_,649		>(|_, agenda| {650			Some(651				agenda652					.into_iter()653					.map(|schedule| {654						schedule.map(|schedule| Scheduled {655							maybe_id: schedule.maybe_id,656							priority: schedule.priority,657							call: schedule.call,658							maybe_periodic: schedule.maybe_periodic,659							origin: schedule.origin.into(),660							_phantom: Default::default(),661						})662					})663					.collect::<Vec<_>>(),664			)665		});666	}667668	fn resolve_time(when: DispatchTime<T::BlockNumber>) -> Result<T::BlockNumber, DispatchError> {669		let now = frame_system::Pallet::<T>::block_number();670671		let when = match when {672			DispatchTime::At(x) => x,673			// The current block has already completed it's scheduled tasks, so674			// Schedule the task at lest one block after this current block.675			DispatchTime::After(x) => now.saturating_add(x).saturating_add(One::one()),676		};677678		if when <= now {679			return Err(Error::<T>::TargetBlockNumberInPast.into());680		}681682		Ok(when)683	}684685	fn do_schedule_named(686		id: ScheduledId,687		when: DispatchTime<T::BlockNumber>,688		maybe_periodic: Option<schedule::Period<T::BlockNumber>>,689		priority: schedule::Priority,690		origin: T::PalletsOrigin,691		call: CallOrHashOf<T>,692	) -> Result<TaskAddress<T::BlockNumber>, DispatchError> {693		// ensure id it is unique694		if Lookup::<T>::contains_key(&id) {695			return Err(Error::<T>::FailedToSchedule)?;696		}697698		let when = Self::resolve_time(when)?;699700		call.ensure_requested::<T::PreimageProvider>();701702		// sanitize maybe_periodic703		let maybe_periodic = maybe_periodic704			.filter(|p| p.1 > 1 && !p.0.is_zero())705			// Remove one from the number of repetitions since we will schedule one now.706			.map(|(p, c)| (p, c - 1));707708		let s = Scheduled {709			maybe_id: Some(id.clone()),710			priority,711			call: call.clone(),712			maybe_periodic,713			origin: origin.clone(),714			_phantom: Default::default(),715		};716717		// reserve balance for periodic execution718		// let sender =719		// 	ensure_signed(<<T as Config>::Origin as From<T::PalletsOrigin>>::from(origin).into())?;720		// let repeats = match maybe_periodic {721		// 	Some(p) => p.1,722		// 	None => 1,723		// };724		// let _ = T::CallExecutor::reserve_balance(725		// 	id.clone(),726		// 	sender,727		// 	call.as_value().unwrap().clone(),728		// 	repeats,729		// );730731		Agenda::<T>::append(when, Some(s));732		let index = Agenda::<T>::decode_len(when).unwrap_or(1) as u32 - 1;733		let address = (when, index);734		Lookup::<T>::insert(&id, &address);735		Self::deposit_event(Event::Scheduled { when, index });736737		Ok(address)738	}739740	fn do_cancel_named(origin: Option<T::PalletsOrigin>, id: ScheduledId) -> DispatchResult {741		Lookup::<T>::try_mutate_exists(id, |lookup| -> DispatchResult {742			if let Some((when, index)) = lookup.take() {743				let i = index as usize;744				Agenda::<T>::try_mutate(when, |agenda| -> DispatchResult {745					if let Some(s) = agenda.get_mut(i) {746						if let (Some(ref o), Some(ref s)) = (origin.clone(), s.borrow()) {747							if matches!(748								T::OriginPrivilegeCmp::cmp_privilege(o, &s.origin),749								Some(Ordering::Less) | None750							) {751								return Err(BadOrigin.into());752							}753							// release balance reserve754							// let sender = ensure_signed(755							// 	<<T as Config>::Origin as From<T::PalletsOrigin>>::from(756							// 		origin.unwrap(),757							// 	)758							// 	.into(),759							// )?;760							// let _ = T::CallExecutor::cancel_reserve(id, sender);761762							s.call.ensure_unrequested::<T::PreimageProvider>();763						}764						*s = None;765					}766					Ok(())767				})?;768769				Self::deposit_event(Event::Canceled { when, index });770				Ok(())771			} else {772				Err(Error::<T>::NotFound)?773			}774		})775	}776777	fn do_change_named_priority(778		origin: T::PalletsOrigin,779		id: ScheduledId,780		priority: schedule::Priority,781	) -> DispatchResult {782		match Lookup::<T>::get(id) {783			Some((when, index)) => {784				let i = index as usize;785				Agenda::<T>::try_mutate(when, |agenda| {786					if let Some(Some(s)) = agenda.get_mut(i) {787						if matches!(788							T::OriginPrivilegeCmp::cmp_privilege(&origin, &s.origin),789							Some(Ordering::Less) | None790						) {791							return Err(BadOrigin.into());792						}793794						s.priority = priority;795						Self::deposit_event(Event::PriorityChanged {796							when,797							index,798							priority,799						});800					}801					Ok(())802				})803			}804			None => Err(Error::<T>::NotFound.into()),805		}806	}807}