git.delta.rocks / unique-network / refs/commits / 0889383aee24

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//! # App promotion18//!19//! The app promotion pallet is designed to ... .20//!21//! ## Interface22//!23//! ### Dispatchable Functions24//!25//! * `start_inflation` - This method sets the inflation start date. Can be only called once.26//! Inflation start block can be backdated and will catch up. The method will create Treasury27//!	account if it does not exist and perform the first inflation deposit.2829// #![recursion_limit = "1024"]30#![cfg_attr(not(feature = "std"), no_std)]3132#[cfg(feature = "runtime-benchmarks")]33mod benchmarking;34#[cfg(test)]35mod tests;36pub mod types;37pub mod weights;3839use sp_std::{vec::Vec, iter::Sum, borrow::ToOwned};40use sp_core::H160;41use codec::EncodeLike;42use pallet_balances::BalanceLock;43pub use types::*;4445// use up_common::constants::{DAYS, UNIQUE};46use up_data_structs::CollectionId;4748use frame_support::{49	dispatch::{DispatchResult},50	traits::{51		Currency, Get, LockableCurrency, WithdrawReasons, tokens::Balance, ExistenceRequirement,52	},53	ensure,54};5556use weights::WeightInfo;5758pub use pallet::*;59use pallet_evm::account::CrossAccountId;60use sp_runtime::{61	Perbill,62	traits::{BlockNumberProvider, CheckedAdd, CheckedSub, AccountIdConversion},63	ArithmeticError,64};6566type BalanceOf<T> =67	<<T as Config>::Currency as Currency<<T as frame_system::Config>::AccountId>>::Balance;6869// const SECONDS_TO_BLOCK: u32 = 6;70// const DAY: u32 = 60 * 60 * 24 / SECONDS_TO_BLOCK;71// const WEEK: u32 = 7 * DAY;72// const TWO_WEEK: u32 = 2 * WEEK;73// const YEAR: u32 = DAY * 365;7475pub const LOCK_IDENTIFIER: [u8; 8] = *b"appstake";7677#[frame_support::pallet]78pub mod pallet {79	use super::*;80	use frame_support::{Blake2_128Concat, Twox64Concat, pallet_prelude::*, storage::Key, PalletId};81	use frame_system::pallet_prelude::*;8283	#[pallet::config]84	pub trait Config: frame_system::Config + pallet_evm::account::Config {85		type Currency: ExtendedLockableCurrency<Self::AccountId>;8687		type CollectionHandler: CollectionHandler<88			AccountId = Self::AccountId,89			CollectionId = CollectionId,90		>;9192		type ContractHandler: ContractHandler<AccountId = Self::CrossAccountId, ContractId = H160>;9394		type TreasuryAccountId: Get<Self::AccountId>;9596		/// The app's pallet id, used for deriving its sovereign account ID.97		#[pallet::constant]98		type PalletId: Get<PalletId>;99100		/// In relay blocks.101		#[pallet::constant]102		type RecalculationInterval: Get<Self::BlockNumber>;103		/// In relay blocks.104		#[pallet::constant]105		type PendingInterval: Get<Self::BlockNumber>;106107		/// In chain blocks.108		#[pallet::constant]109		type Day: Get<Self::BlockNumber>; // useless110111		#[pallet::constant]112		type Nominal: Get<BalanceOf<Self>>;113114		#[pallet::constant]115		type IntervalIncome: Get<Perbill>;116117		/// Weight information for extrinsics in this pallet.118		type WeightInfo: WeightInfo;119120		// The relay block number provider121		type RelayBlockNumberProvider: BlockNumberProvider<BlockNumber = Self::BlockNumber>;122123		/// Events compatible with [`frame_system::Config::Event`].124		type Event: IsType<<Self as frame_system::Config>::Event> + From<Event<Self>>;125	}126127	#[pallet::pallet]128	#[pallet::generate_store(pub(super) trait Store)]129	pub struct Pallet<T>(_);130131	#[pallet::event]132	#[pallet::generate_deposit(fn deposit_event)]133	pub enum Event<T: Config> {134		StakingRecalculation(135			/// An recalculated staker136			T::AccountId,137			/// Base on which interest is calculated138			BalanceOf<T>,139			/// Amount of accrued interest140			BalanceOf<T>,141		),142	}143144	#[pallet::error]145	pub enum Error<T> {146		/// Error due to action requiring admin to be set147		AdminNotSet,148		/// No permission to perform an action149		NoPermission,150		/// Insufficient funds to perform an action151		NotSufficientFounds,152		/// An error related to the fact that an invalid argument was passed to perform an action153		InvalidArgument,154	}155156	#[pallet::storage]157	pub type TotalStaked<T: Config> = StorageValue<Value = BalanceOf<T>, QueryKind = ValueQuery>;158159	#[pallet::storage]160	pub type Admin<T: Config> = StorageValue<Value = T::AccountId, QueryKind = OptionQuery>;161162	/// Amount of tokens staked by account in the blocknumber.163	#[pallet::storage]164	pub type Staked<T: Config> = StorageNMap<165		Key = (166			Key<Blake2_128Concat, T::AccountId>,167			Key<Twox64Concat, T::BlockNumber>,168		),169		Value = (BalanceOf<T>, T::BlockNumber),170		QueryKind = ValueQuery,171	>;172173	/// Amount of tokens pending unstake per user per block.174	#[pallet::storage]175	pub type PendingUnstake<T: Config> = StorageNMap<176		Key = (177			Key<Blake2_128Concat, T::AccountId>,178			Key<Twox64Concat, T::BlockNumber>,179		),180		Value = BalanceOf<T>,181		QueryKind = ValueQuery,182	>;183184	/// A block when app-promotion has started .I think this is redundant, because we only need `NextInterestBlock`.185	#[pallet::storage]186	pub type StartBlock<T: Config> = StorageValue<Value = T::BlockNumber, QueryKind = ValueQuery>;187188	/// Next target block when interest is recalculated189	#[pallet::storage]190	#[pallet::getter(fn get_interest_block)]191	pub type NextInterestBlock<T: Config> =192		StorageValue<Value = T::BlockNumber, QueryKind = ValueQuery>;193194	/// Stores hash a record for which the last revenue recalculation was performed.195	/// If `None`, then recalculation has not yet been performed or calculations have been completed for all stakers.196	#[pallet::storage]197	#[pallet::getter(fn get_next_calculated_record)]198	pub type NextCalculatedRecord<T: Config> =199		StorageValue<Value = (T::AccountId, T::BlockNumber), QueryKind = OptionQuery>;200201	#[pallet::hooks]202	impl<T: Config> Hooks<BlockNumberFor<T>> for Pallet<T> {203		fn on_initialize(current_block: T::BlockNumber) -> Weight204		where205			<T as frame_system::Config>::BlockNumber: From<u32>,206		{207			let mut consumed_weight = 0;208			// let mut add_weight = |reads, writes, weight| {209			// 	consumed_weight += T::DbWeight::get().reads_writes(reads, writes);210			// 	consumed_weight += weight;211			// };212			213			let current_relay_block = T::RelayBlockNumberProvider::current_block_number();214			PendingUnstake::<T>::iter()215				.filter_map(|((staker, block), amount)| {216					if block <= current_relay_block {217						Some((staker, block, amount))218					} else {219						None220					}221				})222				.for_each(|(staker, block, amount)| {223					Self::unlock_balance_unchecked(&staker, amount); 224					<PendingUnstake<T>>::remove((staker, block));225				});226227			// let next_interest_block = Self::get_interest_block();228			// let current_relay_block = T::RelayBlockNumberProvider::current_block_number();229			// if next_interest_block != 0.into() && current_relay_block >= next_interest_block {230			// 	let mut acc = <BalanceOf<T>>::default();231			// 	let mut base_acc = <BalanceOf<T>>::default();232233			// 	NextInterestBlock::<T>::set(234			// 		NextInterestBlock::<T>::get() + T::RecalculationInterval::get(),235			// 	);236			// 	add_weight(0, 1, 0);237238			// 	Staked::<T>::iter()239			// 		.filter(|((_, block), _)| {240			// 			*block + T::RecalculationInterval::get() <= current_relay_block241			// 		})242			// 		.for_each(|((staker, block), amount)| {243			// 			Self::recalculate_stake(&staker, block, amount, &mut acc);244			// 			add_weight(0, 0, T::WeightInfo::recalculate_stake());245			// 			base_acc += amount;246			// 		});247			// 	<TotalStaked<T>>::get()248			// 		.checked_add(&acc)249			// 		.map(|res| <TotalStaked<T>>::set(res));250251			// 	Self::deposit_event(Event::StakingRecalculation(base_acc, acc));252			// 	add_weight(0, 1, 0);253			// } else {254			// 	add_weight(1, 0, 0)255			// };256			consumed_weight257		}258	}259260	#[pallet::call]261	impl<T: Config> Pallet<T>262	where263		T::BlockNumber: From<u32> + Into<u32>,264		<<T as Config>::Currency as Currency<T::AccountId>>::Balance: Sum + From<u128>,265	{266		#[pallet::weight(T::WeightInfo::set_admin_address())]267		pub fn set_admin_address(origin: OriginFor<T>, admin: T::CrossAccountId) -> DispatchResult {268			ensure_root(origin)?;269			<Admin<T>>::set(Some(admin.as_sub().to_owned()));270271			Ok(())272		}273274		#[pallet::weight(T::WeightInfo::start_app_promotion())]275		pub fn start_app_promotion(276			origin: OriginFor<T>,277			promotion_start_relay_block: Option<T::BlockNumber>,278		) -> DispatchResult279		where280			<T as frame_system::Config>::BlockNumber: From<u32>,281		{282			ensure_root(origin)?;283284			// Start app-promotion mechanics if it has not been yet initialized285			if <StartBlock<T>>::get() == 0u32.into() {286				let start_block = promotion_start_relay_block287					.unwrap_or(T::RelayBlockNumberProvider::current_block_number());288289				// Set promotion global start block290				<StartBlock<T>>::set(start_block);291292				<NextInterestBlock<T>>::set(start_block + T::RecalculationInterval::get());293			}294295			Ok(())296		}297298		#[pallet::weight(T::WeightInfo::stop_app_promotion())]299		pub fn stop_app_promotion(origin: OriginFor<T>) -> DispatchResult300		where301			<T as frame_system::Config>::BlockNumber: From<u32>,302		{303			ensure_root(origin)?;304305			if <StartBlock<T>>::get() != 0u32.into() {306				<StartBlock<T>>::set(T::BlockNumber::default());307				<NextInterestBlock<T>>::set(T::BlockNumber::default());308			}309310			Ok(())311		}312313		#[pallet::weight(T::WeightInfo::stake())]314		pub fn stake(staker: OriginFor<T>, amount: BalanceOf<T>) -> DispatchResult {315			let staker_id = ensure_signed(staker)?;316317			ensure!(318				amount >= Into::<BalanceOf<T>>::into(100u128) * T::Nominal::get(),319				ArithmeticError::Underflow320			);321322			let balance =323				<<T as Config>::Currency as Currency<T::AccountId>>::free_balance(&staker_id);324325			ensure!(balance >= amount, ArithmeticError::Underflow);326327			<<T as Config>::Currency as Currency<T::AccountId>>::ensure_can_withdraw(328				&staker_id,329				amount,330				WithdrawReasons::all(),331				balance - amount,332			)?;333334			Self::add_lock_balance(&staker_id, amount)?;335336			let block_number = T::RelayBlockNumberProvider::current_block_number();337			let recalc_block = (block_number / T::RecalculationInterval::get() + 2u32.into())338				* T::RecalculationInterval::get();339340			<Staked<T>>::insert((&staker_id, block_number), {341				let mut balance_and_recalc_block = <Staked<T>>::get((&staker_id, block_number));342				balance_and_recalc_block.0 = balance_and_recalc_block343					.0344					.checked_add(&amount)345					.ok_or(ArithmeticError::Overflow)?;346				balance_and_recalc_block.1 = recalc_block;347				balance_and_recalc_block348			});349350			<TotalStaked<T>>::set(351				<TotalStaked<T>>::get()352					.checked_add(&amount)353					.ok_or(ArithmeticError::Overflow)?,354			);355356			Ok(())357		}358359		#[pallet::weight(T::WeightInfo::unstake())]360		pub fn unstake(staker: OriginFor<T>) -> DispatchResultWithPostInfo {361			let staker_id = ensure_signed(staker)?;362363			let mut total_stakes = 0u64;364365			let total_staked: BalanceOf<T> = Staked::<T>::drain_prefix((&staker_id,))366				.map(|(_, (amount, _))| {367					*&mut total_stakes += 1;368					amount369				})370				.sum();371372			let block =373				T::RelayBlockNumberProvider::current_block_number() + T::PendingInterval::get();374			<PendingUnstake<T>>::insert(375				(&staker_id, block),376				<PendingUnstake<T>>::get((&staker_id, block))377					.checked_add(&total_staked)378					.ok_or(ArithmeticError::Overflow)?,379			);380381			TotalStaked::<T>::set(382				TotalStaked::<T>::get()383					.checked_sub(&total_staked)384					.ok_or(ArithmeticError::Underflow)?,385			); // when error we should recover initial stake state for the staker386387			Ok(None.into())388389			// let staker_id = ensure_signed(staker)?;390391			// let mut stakes = Staked::<T>::iter_prefix((&staker_id,)).collect::<Vec<_>>();392393			// let total_staked = stakes394			// 	.iter()395			// 	.fold(<BalanceOf<T>>::default(), |acc, (_, amount)| acc + *amount);396397			// ensure!(total_staked >= amount, ArithmeticError::Underflow);398399			// <TotalStaked<T>>::set(400			// 	<TotalStaked<T>>::get()401			// 		.checked_sub(&amount)402			// 		.ok_or(ArithmeticError::Underflow)?,403			// );404405			// let block =406			// 	T::RelayBlockNumberProvider::current_block_number() + T::PendingInterval::get();407			// <PendingUnstake<T>>::insert(408			// 	(&staker_id, block),409			// 	<PendingUnstake<T>>::get((&staker_id, block))410			// 		.checked_add(&amount)411			// 		.ok_or(ArithmeticError::Overflow)?,412			// );413414			// stakes.sort_by_key(|(block, _)| *block);415416			// let mut acc_amount = amount;417			// let new_state = stakes418			// 	.into_iter()419			// 	.map_while(|(block, balance_per_block)| {420			// 		if acc_amount == <BalanceOf<T>>::default() {421			// 			return None;422			// 		}423			// 		if acc_amount <= balance_per_block {424			// 			let res = (block, balance_per_block - acc_amount, acc_amount);425			// 			acc_amount = <BalanceOf<T>>::default();426			// 			return Some(res);427			// 		} else {428			// 			acc_amount -= balance_per_block;429			// 			return Some((block, <BalanceOf<T>>::default(), acc_amount));430			// 		}431			// 	})432			// 	.collect::<Vec<_>>();433434			// new_state435			// 	.into_iter()436			// 	.for_each(|(block, to_staked, _to_pending)| {437			// 		if to_staked == <BalanceOf<T>>::default() {438			// 			<Staked<T>>::remove((&staker_id, block));439			// 		} else {440			// 			<Staked<T>>::insert((&staker_id, block), to_staked);441			// 		}442			// 	});443444			// Ok(())445		}446447		#[pallet::weight(T::WeightInfo::sponsor_collection())]448		pub fn sponsor_collection(449			admin: OriginFor<T>,450			collection_id: CollectionId,451		) -> DispatchResult {452			let admin_id = ensure_signed(admin)?;453			ensure!(454				admin_id == Admin::<T>::get().ok_or(Error::<T>::AdminNotSet)?,455				Error::<T>::NoPermission456			);457458			T::CollectionHandler::set_sponsor(Self::account_id(), collection_id)459		}460		#[pallet::weight(T::WeightInfo::stop_sponsoring_collection())]461		pub fn stop_sponsoring_collection(462			admin: OriginFor<T>,463			collection_id: CollectionId,464		) -> DispatchResult {465			let admin_id = ensure_signed(admin)?;466467			ensure!(468				admin_id == Admin::<T>::get().ok_or(Error::<T>::AdminNotSet)?,469				Error::<T>::NoPermission470			);471472			ensure!(473				T::CollectionHandler::get_sponsor(collection_id)?474					.ok_or(<Error<T>>::InvalidArgument)?475					== Self::account_id(),476				<Error<T>>::NoPermission477			);478			T::CollectionHandler::remove_collection_sponsor(collection_id)479		}480481		#[pallet::weight(T::WeightInfo::sponsor_contract())]482		pub fn sponsor_conract(admin: OriginFor<T>, contract_id: H160) -> DispatchResult {483			let admin_id = ensure_signed(admin)?;484485			ensure!(486				admin_id == Admin::<T>::get().ok_or(Error::<T>::AdminNotSet)?,487				Error::<T>::NoPermission488			);489490			T::ContractHandler::set_sponsor(491				T::CrossAccountId::from_sub(Self::account_id()),492				contract_id,493			)494		}495496		#[pallet::weight(T::WeightInfo::stop_sponsoring_contract())]497		pub fn stop_sponsoring_contract(admin: OriginFor<T>, contract_id: H160) -> DispatchResult {498			let admin_id = ensure_signed(admin)?;499500			ensure!(501				admin_id == Admin::<T>::get().ok_or(Error::<T>::AdminNotSet)?,502				Error::<T>::NoPermission503			);504505			ensure!(506				T::ContractHandler::get_sponsor(contract_id)?.ok_or(<Error<T>>::InvalidArgument)?507					== T::CrossAccountId::from_sub(Self::account_id()),508				<Error<T>>::NoPermission509			);510			T::ContractHandler::remove_contract_sponsor(contract_id)511		}512513		#[pallet::weight(0)]514		pub fn payout_stakers(admin: OriginFor<T>, stakers_number: Option<u8>) -> DispatchResult {515			let admin_id = ensure_signed(admin)?;516517			ensure!(518				admin_id == Admin::<T>::get().ok_or(Error::<T>::AdminNotSet)?,519				Error::<T>::NoPermission520			);521522			let current_recalc_block =523				Self::get_current_recalc_block(T::RelayBlockNumberProvider::current_block_number());524			let next_recalc_block = current_recalc_block + T::RecalculationInterval::get();525526			let mut storage_iterator = Self::get_next_calculated_key()527				.map_or(Staked::<T>::iter().skip(0), |key| {528					Staked::<T>::iter_from(key).skip(1)529				});530531			NextCalculatedRecord::<T>::set(None);532533			{534				let mut stakers_number = stakers_number.unwrap_or(20);535				let mut current_id = admin_id;536				let mut income_acc = BalanceOf::<T>::default();537538				while let Some(((id, staked_block), (amount, next_recalc_block_for_stake))) =539					storage_iterator.next()540				{541					if current_id != id {542						if income_acc != BalanceOf::<T>::default() {543							<T::Currency as Currency<T::AccountId>>::transfer(544								&T::TreasuryAccountId::get(),545								&current_id,546								income_acc,547								ExistenceRequirement::KeepAlive,548							)549							.and_then(|_| Self::add_lock_balance(&current_id, income_acc))?;550551							Self::deposit_event(Event::StakingRecalculation(552								current_id, amount, income_acc,553							));554						}555556						if stakers_number == 0 {557							NextCalculatedRecord::<T>::set(Some((id, staked_block)));558							break;559						}560						stakers_number -= 1;561						income_acc = BalanceOf::<T>::default();562						current_id = id;563					};564					if next_recalc_block_for_stake >= current_recalc_block {565						Self::recalculate_and_insert_stake(566							&current_id,567							staked_block,568							next_recalc_block,569							amount,570							((next_recalc_block_for_stake - current_recalc_block)571								/ T::RecalculationInterval::get())572							.into() + 1,573							&mut income_acc,574						);575					}576				}577			}578579			Ok(())580		}581	}582}583584impl<T: Config> Pallet<T> {585	pub fn account_id() -> T::AccountId {586		T::PalletId::get().into_account_truncating()587	}588589	fn unlock_balance_unchecked(staker: &T::AccountId, amount: BalanceOf<T>) {590		let mut locked_balance = Self::get_locked_balance(staker).map(|l| l.amount).unwrap();591		locked_balance -= amount;592		Self::set_lock_unchecked(staker, locked_balance);593	}594595	fn add_lock_balance(staker: &T::AccountId, amount: BalanceOf<T>) -> DispatchResult {596		Self::get_locked_balance(staker)597			.map_or(<BalanceOf<T>>::default(), |l| l.amount)598			.checked_add(&amount)599			.map(|new_lock| Self::set_lock_unchecked(staker, new_lock))600			.ok_or(ArithmeticError::Overflow.into())601	}602603	fn set_lock_unchecked(staker: &T::AccountId, amount: BalanceOf<T>) {604		<T::Currency as LockableCurrency<T::AccountId>>::set_lock(605			LOCK_IDENTIFIER,606			staker,607			amount,608			WithdrawReasons::all(),609		)610	}611612	pub fn get_locked_balance(613		staker: impl EncodeLike<T::AccountId>,614	) -> Option<BalanceLock<BalanceOf<T>>> {615		<T::Currency as ExtendedLockableCurrency<T::AccountId>>::locks(staker)616			.into_iter()617			.find(|l| l.id == LOCK_IDENTIFIER)618	}619620	pub fn total_staked_by_id(staker: impl EncodeLike<T::AccountId>) -> Option<BalanceOf<T>> {621		let staked = Staked::<T>::iter_prefix((staker,))622			.into_iter()623			.fold(<BalanceOf<T>>::default(), |acc, (_, (amount, _))| {624				acc + amount625			});626		if staked != <BalanceOf<T>>::default() {627			Some(staked)628		} else {629			None630		}631	}632633	pub fn total_staked_by_id_per_block(634		staker: impl EncodeLike<T::AccountId>,635	) -> Option<Vec<(T::BlockNumber, BalanceOf<T>)>> {636		let mut staked = Staked::<T>::iter_prefix((staker,))637			.into_iter()638			.map(|(block, (amount, _))| (block, amount))639			.collect::<Vec<_>>();640		staked.sort_by_key(|(block, _)| *block);641		if !staked.is_empty() {642			Some(staked)643		} else {644			None645		}646	}647648	pub fn cross_id_total_staked(staker: Option<T::CrossAccountId>) -> Option<BalanceOf<T>> {649		staker.map_or(Some(<TotalStaked<T>>::get()), |s| {650			Self::total_staked_by_id(s.as_sub())651		})652		// Self::total_staked_by_id(staker.as_sub())653	}654655	pub fn cross_id_locked_balance(staker: T::CrossAccountId) -> BalanceOf<T> {656		Self::get_locked_balance(staker.as_sub())657			.map(|l| l.amount)658			.unwrap_or_default()659	}660661	pub fn cross_id_total_staked_per_block(662		staker: T::CrossAccountId,663	) -> Vec<(T::BlockNumber, BalanceOf<T>)> {664		Self::total_staked_by_id_per_block(staker.as_sub()).unwrap_or_default()665	}666667	fn recalculate_and_insert_stake(668		staker: &T::AccountId,669		staked_block: T::BlockNumber,670		next_recalc_block: T::BlockNumber,671		base: BalanceOf<T>,672		iters: u32,673		income_acc: &mut BalanceOf<T>,674	) {675		let income = Self::calculate_income(base, iters);676677		base.checked_add(&income).map(|res| {678			<Staked<T>>::insert((staker, staked_block), (res, next_recalc_block));679			*income_acc += income;680		});681	}682683	fn calculate_income<I>(base: I, iters: u32) -> I684	where685		I: EncodeLike<BalanceOf<T>> + Balance,686	{687		let mut income = base;688689		(0..iters).for_each(|_| income += T::IntervalIncome::get() * income);690691		income - base692	}693694	fn get_current_recalc_block(current_relay_block: T::BlockNumber) -> T::BlockNumber {695		(current_relay_block / T::RecalculationInterval::get()) * T::RecalculationInterval::get()696	}697698	// fn get_next_recalc_block(current_relay_block: T::BlockNumber) -> T::BlockNumber {699	// 	Self::get_current_recalc_block(current_relay_block) + T::RecalculationInterval::get()700	// }701702	fn get_next_calculated_key() -> Option<Vec<u8>> {703		Self::get_next_calculated_record().map(|key| Staked::<T>::hashed_key_for(key))704	}705}706707impl<T: Config> Pallet<T>708where709	<<T as Config>::Currency as Currency<T::AccountId>>::Balance: Sum,710{711	pub fn cross_id_pending_unstake(staker: Option<T::CrossAccountId>) -> BalanceOf<T> {712		staker.map_or(PendingUnstake::<T>::iter_values().sum(), |s| {713			PendingUnstake::<T>::iter_prefix_values((s.as_sub(),)).sum()714		})715	}716717	pub fn cross_id_pending_unstake_per_block(718		staker: T::CrossAccountId,719	) -> Vec<(T::BlockNumber, BalanceOf<T>)> {720		let mut unsorted_res = PendingUnstake::<T>::iter_prefix((staker.as_sub(),))721			.into_iter()722			.collect::<Vec<_>>();723		unsorted_res.sort_by_key(|(block, _)| *block);724		unsorted_res725	}726}