git.delta.rocks / unique-network / refs/commits / d030d8a70b74

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#![cfg_attr(not(feature = "std"), no_std)]1819use core::ops::{Deref, DerefMut};20use pallet_evm_coder_substrate::{SubstrateRecorder, WithRecorder};21use sp_std::vec::Vec;22use pallet_evm::account::CrossAccountId;23use frame_support::{24	dispatch::{DispatchErrorWithPostInfo, DispatchResultWithPostInfo},25	ensure, fail,26	traits::{Imbalance, Get, Currency},27	BoundedVec,28};29use pallet_evm::GasWeightMapping;30use up_data_structs::{31	COLLECTION_NUMBER_LIMIT, Collection, CollectionId, CreateItemData, ExistenceRequirement,32	MAX_TOKEN_PREFIX_LENGTH, COLLECTION_ADMINS_LIMIT, MetaUpdatePermission, Pays, PostDispatchInfo,33	TokenId, Weight, WithdrawReasons, CollectionStats, MAX_TOKEN_OWNERSHIP, CollectionMode,34	NFT_SPONSOR_TRANSFER_TIMEOUT, FUNGIBLE_SPONSOR_TRANSFER_TIMEOUT,35	REFUNGIBLE_SPONSOR_TRANSFER_TIMEOUT, MAX_SPONSOR_TIMEOUT, CUSTOM_DATA_LIMIT, CollectionLimits,36	CustomDataLimit, CreateCollectionData, SponsorshipState, CreateItemExData,37};38pub use pallet::*;39use sp_core::H160;40use sp_runtime::{ArithmeticError, DispatchError, DispatchResult};41#[cfg(feature = "runtime-benchmarks")]42pub mod benchmarking;43pub mod erc;44pub mod eth;4546#[must_use = "Should call submit_logs or save, otherwise some data will be lost for evm side"]47pub struct CollectionHandle<T: Config> {48	pub id: CollectionId,49	collection: Collection<T::AccountId>,50	pub recorder: SubstrateRecorder<T>,51}52impl<T: Config> WithRecorder<T> for CollectionHandle<T> {53	fn recorder(&self) -> &SubstrateRecorder<T> {54		&self.recorder55	}56	fn into_recorder(self) -> SubstrateRecorder<T> {57		self.recorder58	}59}60impl<T: Config> CollectionHandle<T> {61	pub fn new_with_gas_limit(id: CollectionId, gas_limit: u64) -> Option<Self> {62		<CollectionById<T>>::get(id).map(|collection| Self {63			id,64			collection,65			recorder: SubstrateRecorder::new(eth::collection_id_to_address(id), gas_limit),66		})67	}68	pub fn new(id: CollectionId) -> Option<Self> {69		Self::new_with_gas_limit(id, u64::MAX)70	}71	pub fn try_get(id: CollectionId) -> Result<Self, DispatchError> {72		Ok(Self::new(id).ok_or(<Error<T>>::CollectionNotFound)?)73	}74	pub fn log_mirrored(&self, log: impl evm_coder::ToLog) {75		self.recorder.log_mirrored(log)76	}77	pub fn log_direct(&self, log: impl evm_coder::ToLog) {78		self.recorder.log_direct(log)79	}80	pub fn consume_store_reads(&self, reads: u64) -> evm_coder::execution::Result<()> {81		self.recorder82			.consume_gas(T::GasWeightMapping::weight_to_gas(83				<T as frame_system::Config>::DbWeight::get()84					.read85					.saturating_mul(reads),86			))87	}88	pub fn consume_store_writes(&self, writes: u64) -> evm_coder::execution::Result<()> {89		self.recorder90			.consume_gas(T::GasWeightMapping::weight_to_gas(91				<T as frame_system::Config>::DbWeight::get()92					.write93					.saturating_mul(writes),94			))95	}96	pub fn submit_logs(self) {97		self.recorder.submit_logs()98	}99	pub fn save(self) -> DispatchResult {100		self.recorder.submit_logs();101		<CollectionById<T>>::insert(self.id, self.collection);102		Ok(())103	}104}105impl<T: Config> Deref for CollectionHandle<T> {106	type Target = Collection<T::AccountId>;107108	fn deref(&self) -> &Self::Target {109		&self.collection110	}111}112113impl<T: Config> DerefMut for CollectionHandle<T> {114	fn deref_mut(&mut self) -> &mut Self::Target {115		&mut self.collection116	}117}118119impl<T: Config> CollectionHandle<T> {120	pub fn check_is_owner(&self, subject: &T::CrossAccountId) -> DispatchResult {121		ensure!(*subject.as_sub() == self.owner, <Error<T>>::NoPermission);122		Ok(())123	}124	pub fn is_owner_or_admin(&self, subject: &T::CrossAccountId) -> bool {125		*subject.as_sub() == self.owner || <IsAdmin<T>>::get((self.id, subject))126	}127	pub fn check_is_owner_or_admin(&self, subject: &T::CrossAccountId) -> DispatchResult {128		ensure!(self.is_owner_or_admin(subject), <Error<T>>::NoPermission);129		Ok(())130	}131	pub fn ignores_allowance(&self, user: &T::CrossAccountId) -> bool {132		self.limits.owner_can_transfer() && self.is_owner_or_admin(user)133	}134	pub fn ignores_owned_amount(&self, user: &T::CrossAccountId) -> bool {135		self.limits.owner_can_transfer() && self.is_owner_or_admin(user)136	}137	pub fn check_allowlist(&self, user: &T::CrossAccountId) -> DispatchResult {138		ensure!(139			<Allowlist<T>>::get((self.id, user)),140			<Error<T>>::AddressNotInAllowlist141		);142		Ok(())143	}144145	pub fn check_can_update_meta(146		&self,147		subject: &T::CrossAccountId,148		item_owner: &T::CrossAccountId,149	) -> DispatchResult {150		match self.meta_update_permission {151			MetaUpdatePermission::ItemOwner => {152				ensure!(subject == item_owner, <Error<T>>::NoPermission);153				Ok(())154			}155			MetaUpdatePermission::Admin => self.check_is_owner_or_admin(subject),156			MetaUpdatePermission::None => fail!(<Error<T>>::NoPermission),157		}158	}159}160161#[frame_support::pallet]162pub mod pallet {163	use super::*;164	use frame_support::{Blake2_128Concat, pallet_prelude::*, storage::Key};165	use pallet_evm::account;166	use frame_support::traits::Currency;167	use up_data_structs::TokenId;168	use scale_info::TypeInfo;169170	#[pallet::config]171	pub trait Config: frame_system::Config + pallet_evm_coder_substrate::Config + TypeInfo + account::Config {172		type Event: IsType<<Self as frame_system::Config>::Event> + From<Event<Self>>;173174		type Currency: Currency<Self::AccountId>;175176		#[pallet::constant]177		type CollectionCreationPrice: Get<178			<<Self as Config>::Currency as Currency<Self::AccountId>>::Balance,179		>;180181		type TreasuryAccountId: Get<Self::AccountId>;182	}183184	#[pallet::pallet]185	#[pallet::generate_store(pub(super) trait Store)]186	pub struct Pallet<T>(_);187188	#[pallet::extra_constants]189	impl<T: Config> Pallet<T> {190		pub fn collection_admins_limit() -> u32 {191			COLLECTION_ADMINS_LIMIT192		}193	}194195	#[pallet::event]196	#[pallet::generate_deposit(pub fn deposit_event)]197	pub enum Event<T: Config> {198		/// New collection was created199		///200		/// # Arguments201		///202		/// * collection_id: Globally unique identifier of newly created collection.203		///204		/// * mode: [CollectionMode] converted into u8.205		///206		/// * account_id: Collection owner.207		CollectionCreated(CollectionId, u8, T::AccountId),208209		/// New collection was destroyed210		///211		/// # Arguments212		///213		/// * collection_id: Globally unique identifier of collection.214		CollectionDestroyed(CollectionId),215216		/// New item was created.217		///218		/// # Arguments219		///220		/// * collection_id: Id of the collection where item was created.221		///222		/// * item_id: Id of an item. Unique within the collection.223		///224		/// * recipient: Owner of newly created item225		///226		/// * amount: Always 1 for NFT227		ItemCreated(CollectionId, TokenId, T::CrossAccountId, u128),228229		/// Collection item was burned.230		///231		/// # Arguments232		///233		/// * collection_id.234		///235		/// * item_id: Identifier of burned NFT.236		///237		/// * owner: which user has destroyed its tokens238		///239		/// * amount: Always 1 for NFT240		ItemDestroyed(CollectionId, TokenId, T::CrossAccountId, u128),241242		/// Item was transferred243		///244		/// * collection_id: Id of collection to which item is belong245		///246		/// * item_id: Id of an item247		///248		/// * sender: Original owner of item249		///250		/// * recipient: New owner of item251		///252		/// * amount: Always 1 for NFT253		Transfer(254			CollectionId,255			TokenId,256			T::CrossAccountId,257			T::CrossAccountId,258			u128,259		),260261		/// * collection_id262		///263		/// * item_id264		///265		/// * sender266		///267		/// * spender268		///269		/// * amount270		Approved(271			CollectionId,272			TokenId,273			T::CrossAccountId,274			T::CrossAccountId,275			u128,276		),277	}278279	#[pallet::error]280	pub enum Error<T> {281		/// This collection does not exist.282		CollectionNotFound,283		/// Sender parameter and item owner must be equal.284		MustBeTokenOwner,285		/// No permission to perform action286		NoPermission,287		/// Collection is not in mint mode.288		PublicMintingNotAllowed,289		/// Address is not in allow list.290		AddressNotInAllowlist,291292		/// Collection name can not be longer than 63 char.293		CollectionNameLimitExceeded,294		/// Collection description can not be longer than 255 char.295		CollectionDescriptionLimitExceeded,296		/// Token prefix can not be longer than 15 char.297		CollectionTokenPrefixLimitExceeded,298		/// Total collections bound exceeded.299		TotalCollectionsLimitExceeded,300		/// variable_data exceeded data limit.301		TokenVariableDataLimitExceeded,302		/// Exceeded max admin count303		CollectionAdminCountExceeded,304		/// Collection limit bounds per collection exceeded305		CollectionLimitBoundsExceeded,306		/// Tried to enable permissions which are only permitted to be disabled307		OwnerPermissionsCantBeReverted,308309		/// Collection settings not allowing items transferring310		TransferNotAllowed,311		/// Account token limit exceeded per collection312		AccountTokenLimitExceeded,313		/// Collection token limit exceeded314		CollectionTokenLimitExceeded,315		/// Metadata flag frozen316		MetadataFlagFrozen,317318		/// Item not exists.319		TokenNotFound,320		/// Item balance not enough.321		TokenValueTooLow,322		/// Requested value more than approved.323		ApprovedValueTooLow,324		/// Tried to approve more than owned325		CantApproveMoreThanOwned,326327		/// Can't transfer tokens to ethereum zero address328		AddressIsZero,329		/// Target collection doesn't supports this operation330		UnsupportedOperation,331332		/// Not sufficient founds to perform action333		NotSufficientFounds,334	}335336	#[pallet::storage]337	pub type CreatedCollectionCount<T> = StorageValue<Value = CollectionId, QueryKind = ValueQuery>;338	#[pallet::storage]339	pub type DestroyedCollectionCount<T> =340		StorageValue<Value = CollectionId, QueryKind = ValueQuery>;341342	/// Collection info343	#[pallet::storage]344	pub type CollectionById<T> = StorageMap<345		Hasher = Blake2_128Concat,346		Key = CollectionId,347		Value = Collection<<T as frame_system::Config>::AccountId>,348		QueryKind = OptionQuery,349	>;350351	#[pallet::storage]352	pub type AdminAmount<T> = StorageMap<353		Hasher = Blake2_128Concat,354		Key = CollectionId,355		Value = u32,356		QueryKind = ValueQuery,357	>;358359	/// List of collection admins360	#[pallet::storage]361	pub type IsAdmin<T: Config> = StorageNMap<362		Key = (363			Key<Blake2_128Concat, CollectionId>,364			Key<Blake2_128Concat, T::CrossAccountId>,365		),366		Value = bool,367		QueryKind = ValueQuery,368	>;369370	/// Allowlisted collection users371	#[pallet::storage]372	pub type Allowlist<T: Config> = StorageNMap<373		Key = (374			Key<Blake2_128Concat, CollectionId>,375			Key<Blake2_128Concat, T::CrossAccountId>,376		),377		Value = bool,378		QueryKind = ValueQuery,379	>;380381	/// Not used by code, exists only to provide some types to metadata382	#[pallet::storage]383	pub type DummyStorageValue<T> =384		StorageValue<Value = (CollectionStats, CollectionId, TokenId), QueryKind = OptionQuery>;385}386387impl<T: Config> Pallet<T> {388	/// Ethereum receiver 0x0000000000000000000000000000000000000000 is reserved, and shouldn't own tokens389	pub fn ensure_correct_receiver(receiver: &T::CrossAccountId) -> DispatchResult {390		ensure!(391			&T::CrossAccountId::from_eth(H160([0; 20])) != receiver,392			<Error<T>>::AddressIsZero393		);394		Ok(())395	}396	pub fn adminlist(collection: CollectionId) -> Vec<T::CrossAccountId> {397		<IsAdmin<T>>::iter_prefix((collection,))398			.map(|(a, _)| a)399			.collect()400	}401	pub fn allowlist(collection: CollectionId) -> Vec<T::CrossAccountId> {402		<Allowlist<T>>::iter_prefix((collection,))403			.map(|(a, _)| a)404			.collect()405	}406	pub fn allowed(collection: CollectionId, user: T::CrossAccountId) -> bool {407		<Allowlist<T>>::get((collection, user))408	}409	pub fn collection_stats() -> CollectionStats {410		let created = <CreatedCollectionCount<T>>::get();411		let destroyed = <DestroyedCollectionCount<T>>::get();412		CollectionStats {413			created: created.0,414			destroyed: destroyed.0,415			alive: created.0 - destroyed.0,416		}417	}418}419420impl<T: Config> Pallet<T> {421	pub fn init_collection(422		owner: T::AccountId,423		data: CreateCollectionData<T::AccountId>,424	) -> Result<CollectionId, DispatchError> {425		{426			ensure!(427				data.token_prefix.len() <= MAX_TOKEN_PREFIX_LENGTH as usize,428				Error::<T>::CollectionTokenPrefixLimitExceeded429			);430		}431432		let created_count = <CreatedCollectionCount<T>>::get()433			.0434			.checked_add(1)435			.ok_or(ArithmeticError::Overflow)?;436		let destroyed_count = <DestroyedCollectionCount<T>>::get().0;437		let id = CollectionId(created_count);438439		// bound Total number of collections440		ensure!(441			created_count - destroyed_count <= COLLECTION_NUMBER_LIMIT,442			<Error<T>>::TotalCollectionsLimitExceeded443		);444445		// =========446447		let collection = Collection {448			owner: owner.clone(),449			name: data.name,450			mode: data.mode.clone(),451			mint_mode: false,452			access: data.access.unwrap_or_default(),453			description: data.description,454			token_prefix: data.token_prefix,455			offchain_schema: data.offchain_schema,456			schema_version: data.schema_version.unwrap_or_default(),457			sponsorship: data458				.pending_sponsor459				.map(SponsorshipState::Unconfirmed)460				.unwrap_or_default(),461			variable_on_chain_schema: data.variable_on_chain_schema,462			const_on_chain_schema: data.const_on_chain_schema,463			limits: data464				.limits465				.map(|limits| Self::clamp_limits(data.mode.clone(), &Default::default(), limits))466				.unwrap_or_else(|| Ok(CollectionLimits::default()))?,467			meta_update_permission: data.meta_update_permission.unwrap_or_default(),468		};469470		// Take a (non-refundable) deposit of collection creation471		{472			let mut imbalance =473				<<<T as Config>::Currency as Currency<T::AccountId>>::PositiveImbalance>::zero();474			imbalance.subsume(475				<<T as Config>::Currency as Currency<T::AccountId>>::deposit_creating(476					&T::TreasuryAccountId::get(),477					T::CollectionCreationPrice::get(),478				),479			);480			<T as Config>::Currency::settle(481				&owner,482				imbalance,483				WithdrawReasons::TRANSFER,484				ExistenceRequirement::KeepAlive,485			)486			.map_err(|_| Error::<T>::NotSufficientFounds)?;487		}488489		<CreatedCollectionCount<T>>::put(created_count);490		<Pallet<T>>::deposit_event(Event::CollectionCreated(id, data.mode.id(), owner.clone()));491		<CollectionById<T>>::insert(id, collection);492		Ok(id)493	}494495	pub fn destroy_collection(496		collection: CollectionHandle<T>,497		sender: &T::CrossAccountId,498	) -> DispatchResult {499		ensure!(500			collection.limits.owner_can_destroy(),501			<Error<T>>::NoPermission,502		);503		collection.check_is_owner(sender)?;504505		let destroyed_collections = <DestroyedCollectionCount<T>>::get()506			.0507			.checked_add(1)508			.ok_or(ArithmeticError::Overflow)?;509510		// =========511512		<DestroyedCollectionCount<T>>::put(destroyed_collections);513		<CollectionById<T>>::remove(collection.id);514		<AdminAmount<T>>::remove(collection.id);515		<IsAdmin<T>>::remove_prefix((collection.id,), None);516		<Allowlist<T>>::remove_prefix((collection.id,), None);517518		<Pallet<T>>::deposit_event(Event::CollectionDestroyed(collection.id));519		Ok(())520	}521522	pub fn toggle_allowlist(523		collection: &CollectionHandle<T>,524		sender: &T::CrossAccountId,525		user: &T::CrossAccountId,526		allowed: bool,527	) -> DispatchResult {528		collection.check_is_owner_or_admin(sender)?;529530		// =========531532		if allowed {533			<Allowlist<T>>::insert((collection.id, user), true);534		} else {535			<Allowlist<T>>::remove((collection.id, user));536		}537538		Ok(())539	}540541	pub fn toggle_admin(542		collection: &CollectionHandle<T>,543		sender: &T::CrossAccountId,544		user: &T::CrossAccountId,545		admin: bool,546	) -> DispatchResult {547		collection.check_is_owner_or_admin(sender)?;548549		let was_admin = <IsAdmin<T>>::get((collection.id, user));550		if was_admin == admin {551			return Ok(());552		}553		let amount = <AdminAmount<T>>::get(collection.id);554555		if admin {556			let amount = amount557				.checked_add(1)558				.ok_or(<Error<T>>::CollectionAdminCountExceeded)?;559			ensure!(560				amount <= Self::collection_admins_limit(),561				<Error<T>>::CollectionAdminCountExceeded,562			);563564			// =========565566			<AdminAmount<T>>::insert(collection.id, amount);567			<IsAdmin<T>>::insert((collection.id, user), true);568		} else {569			<AdminAmount<T>>::insert(collection.id, amount.saturating_sub(1));570			<IsAdmin<T>>::remove((collection.id, user));571		}572573		Ok(())574	}575576	pub fn clamp_limits(577		mode: CollectionMode,578		old_limit: &CollectionLimits,579		mut new_limit: CollectionLimits,580	) -> Result<CollectionLimits, DispatchError> {581		macro_rules! limit_default {582				($old:ident, $new:ident, $($field:ident $(($arg:expr))? => $check:expr),* $(,)?) => {{583					$(584						if let Some($new) = $new.$field {585							let $old = $old.$field($($arg)?);586							let _ = $new;587							let _ = $old;588							$check589						} else {590							$new.$field = $old.$field591						}592					)*593				}};594			}595596		limit_default!(old_limit, new_limit,597			account_token_ownership_limit => ensure!(598				new_limit <= MAX_TOKEN_OWNERSHIP,599				<Error<T>>::CollectionLimitBoundsExceeded,600			),601			sponsor_transfer_timeout(match mode {602				CollectionMode::NFT => NFT_SPONSOR_TRANSFER_TIMEOUT,603				CollectionMode::Fungible(_) => FUNGIBLE_SPONSOR_TRANSFER_TIMEOUT,604				CollectionMode::ReFungible => REFUNGIBLE_SPONSOR_TRANSFER_TIMEOUT,605			}) => ensure!(606				new_limit <= MAX_SPONSOR_TIMEOUT,607				<Error<T>>::CollectionLimitBoundsExceeded,608			),609			sponsored_data_size => ensure!(610				new_limit <= CUSTOM_DATA_LIMIT,611				<Error<T>>::CollectionLimitBoundsExceeded,612			),613			token_limit => ensure!(614				old_limit >= new_limit && new_limit > 0,615				<Error<T>>::CollectionTokenLimitExceeded616			),617			owner_can_transfer => ensure!(618				old_limit || !new_limit,619				<Error<T>>::OwnerPermissionsCantBeReverted,620			),621			owner_can_destroy => ensure!(622				old_limit || !new_limit,623				<Error<T>>::OwnerPermissionsCantBeReverted,624			),625			sponsored_data_rate_limit => {},626			transfers_enabled => {},627		);628		Ok(new_limit)629	}630}631632#[macro_export]633macro_rules! unsupported {634	() => {635		Err(<Error<T>>::UnsupportedOperation.into())636	};637}638639/// Worst cases640pub trait CommonWeightInfo<CrossAccountId> {641	fn create_item() -> Weight;642	fn create_multiple_items(amount: u32) -> Weight;643	fn create_multiple_items_ex(cost: &CreateItemExData<CrossAccountId>) -> Weight;644	fn burn_item() -> Weight;645	fn transfer() -> Weight;646	fn approve() -> Weight;647	fn transfer_from() -> Weight;648	fn burn_from() -> Weight;649	fn set_variable_metadata(bytes: u32) -> Weight;650}651652pub trait CommonCollectionOperations<T: Config> {653	fn create_item(654		&self,655		sender: T::CrossAccountId,656		to: T::CrossAccountId,657		data: CreateItemData,658	) -> DispatchResultWithPostInfo;659	fn create_multiple_items(660		&self,661		sender: T::CrossAccountId,662		to: T::CrossAccountId,663		data: Vec<CreateItemData>,664	) -> DispatchResultWithPostInfo;665	fn create_multiple_items_ex(666		&self,667		sender: T::CrossAccountId,668		data: CreateItemExData<T::CrossAccountId>,669	) -> DispatchResultWithPostInfo;670	fn burn_item(671		&self,672		sender: T::CrossAccountId,673		token: TokenId,674		amount: u128,675	) -> DispatchResultWithPostInfo;676677	fn transfer(678		&self,679		sender: T::CrossAccountId,680		to: T::CrossAccountId,681		token: TokenId,682		amount: u128,683	) -> DispatchResultWithPostInfo;684	fn approve(685		&self,686		sender: T::CrossAccountId,687		spender: T::CrossAccountId,688		token: TokenId,689		amount: u128,690	) -> DispatchResultWithPostInfo;691	fn transfer_from(692		&self,693		sender: T::CrossAccountId,694		from: T::CrossAccountId,695		to: T::CrossAccountId,696		token: TokenId,697		amount: u128,698	) -> DispatchResultWithPostInfo;699	fn burn_from(700		&self,701		sender: T::CrossAccountId,702		from: T::CrossAccountId,703		token: TokenId,704		amount: u128,705	) -> DispatchResultWithPostInfo;706707	fn set_variable_metadata(708		&self,709		sender: T::CrossAccountId,710		token: TokenId,711		data: BoundedVec<u8, CustomDataLimit>,712	) -> DispatchResultWithPostInfo;713714	fn account_tokens(&self, account: T::CrossAccountId) -> Vec<TokenId>;715	fn token_exists(&self, token: TokenId) -> bool;716	fn last_token_id(&self) -> TokenId;717718	fn token_owner(&self, token: TokenId) -> Option<T::CrossAccountId>;719	fn const_metadata(&self, token: TokenId) -> Vec<u8>;720	fn variable_metadata(&self, token: TokenId) -> Vec<u8>;721722	/// How many tokens collection contains (Applicable to nonfungible/refungible)723	fn collection_tokens(&self) -> u32;724	/// Amount of different tokens account has (Applicable to nonfungible/refungible)725	fn account_balance(&self, account: T::CrossAccountId) -> u32;726	/// Amount of specific token account have (Applicable to fungible/refungible)727	fn balance(&self, account: T::CrossAccountId, token: TokenId) -> u128;728	fn allowance(729		&self,730		sender: T::CrossAccountId,731		spender: T::CrossAccountId,732		token: TokenId,733	) -> u128;734}735736// Flexible enough for implementing CommonCollectionOperations737pub fn with_weight(res: DispatchResult, weight: Weight) -> DispatchResultWithPostInfo {738	let post_info = PostDispatchInfo {739		actual_weight: Some(weight),740		pays_fee: Pays::Yes,741	};742	match res {743		Ok(()) => Ok(post_info),744		Err(error) => Err(DispatchErrorWithPostInfo { post_info, error }),745	}746}