git.delta.rocks / unique-network / refs/commits / 0daf5cb79b55

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:172		frame_system::Config + pallet_evm_coder_substrate::Config + TypeInfo + account::Config173	{174		type Event: IsType<<Self as frame_system::Config>::Event> + From<Event<Self>>;175176		type Currency: Currency<Self::AccountId>;177178		#[pallet::constant]179		type CollectionCreationPrice: Get<180			<<Self as Config>::Currency as Currency<Self::AccountId>>::Balance,181		>;182183		type TreasuryAccountId: Get<Self::AccountId>;184	}185186	#[pallet::pallet]187	#[pallet::generate_store(pub(super) trait Store)]188	pub struct Pallet<T>(_);189190	#[pallet::extra_constants]191	impl<T: Config> Pallet<T> {192		pub fn collection_admins_limit() -> u32 {193			COLLECTION_ADMINS_LIMIT194		}195	}196197	#[pallet::event]198	#[pallet::generate_deposit(pub fn deposit_event)]199	pub enum Event<T: Config> {200		/// New collection was created201		///202		/// # Arguments203		///204		/// * collection_id: Globally unique identifier of newly created collection.205		///206		/// * mode: [CollectionMode] converted into u8.207		///208		/// * account_id: Collection owner.209		CollectionCreated(CollectionId, u8, T::AccountId),210211		/// New collection was destroyed212		///213		/// # Arguments214		///215		/// * collection_id: Globally unique identifier of collection.216		CollectionDestroyed(CollectionId),217218		/// New item was created.219		///220		/// # Arguments221		///222		/// * collection_id: Id of the collection where item was created.223		///224		/// * item_id: Id of an item. Unique within the collection.225		///226		/// * recipient: Owner of newly created item227		///228		/// * amount: Always 1 for NFT229		ItemCreated(CollectionId, TokenId, T::CrossAccountId, u128),230231		/// Collection item was burned.232		///233		/// # Arguments234		///235		/// * collection_id.236		///237		/// * item_id: Identifier of burned NFT.238		///239		/// * owner: which user has destroyed its tokens240		///241		/// * amount: Always 1 for NFT242		ItemDestroyed(CollectionId, TokenId, T::CrossAccountId, u128),243244		/// Item was transferred245		///246		/// * collection_id: Id of collection to which item is belong247		///248		/// * item_id: Id of an item249		///250		/// * sender: Original owner of item251		///252		/// * recipient: New owner of item253		///254		/// * amount: Always 1 for NFT255		Transfer(256			CollectionId,257			TokenId,258			T::CrossAccountId,259			T::CrossAccountId,260			u128,261		),262263		/// * collection_id264		///265		/// * item_id266		///267		/// * sender268		///269		/// * spender270		///271		/// * amount272		Approved(273			CollectionId,274			TokenId,275			T::CrossAccountId,276			T::CrossAccountId,277			u128,278		),279	}280281	#[pallet::error]282	pub enum Error<T> {283		/// This collection does not exist.284		CollectionNotFound,285		/// Sender parameter and item owner must be equal.286		MustBeTokenOwner,287		/// No permission to perform action288		NoPermission,289		/// Collection is not in mint mode.290		PublicMintingNotAllowed,291		/// Address is not in allow list.292		AddressNotInAllowlist,293294		/// Collection name can not be longer than 63 char.295		CollectionNameLimitExceeded,296		/// Collection description can not be longer than 255 char.297		CollectionDescriptionLimitExceeded,298		/// Token prefix can not be longer than 15 char.299		CollectionTokenPrefixLimitExceeded,300		/// Total collections bound exceeded.301		TotalCollectionsLimitExceeded,302		/// variable_data exceeded data limit.303		TokenVariableDataLimitExceeded,304		/// Exceeded max admin count305		CollectionAdminCountExceeded,306		/// Collection limit bounds per collection exceeded307		CollectionLimitBoundsExceeded,308		/// Tried to enable permissions which are only permitted to be disabled309		OwnerPermissionsCantBeReverted,310311		/// Collection settings not allowing items transferring312		TransferNotAllowed,313		/// Account token limit exceeded per collection314		AccountTokenLimitExceeded,315		/// Collection token limit exceeded316		CollectionTokenLimitExceeded,317		/// Metadata flag frozen318		MetadataFlagFrozen,319320		/// Item not exists.321		TokenNotFound,322		/// Item balance not enough.323		TokenValueTooLow,324		/// Requested value more than approved.325		ApprovedValueTooLow,326		/// Tried to approve more than owned327		CantApproveMoreThanOwned,328329		/// Can't transfer tokens to ethereum zero address330		AddressIsZero,331		/// Target collection doesn't supports this operation332		UnsupportedOperation,333334		/// Not sufficient founds to perform action335		NotSufficientFounds,336	}337338	#[pallet::storage]339	pub type CreatedCollectionCount<T> = StorageValue<Value = CollectionId, QueryKind = ValueQuery>;340	#[pallet::storage]341	pub type DestroyedCollectionCount<T> =342		StorageValue<Value = CollectionId, QueryKind = ValueQuery>;343344	/// Collection info345	#[pallet::storage]346	pub type CollectionById<T> = StorageMap<347		Hasher = Blake2_128Concat,348		Key = CollectionId,349		Value = Collection<<T as frame_system::Config>::AccountId>,350		QueryKind = OptionQuery,351	>;352353	#[pallet::storage]354	pub type AdminAmount<T> = StorageMap<355		Hasher = Blake2_128Concat,356		Key = CollectionId,357		Value = u32,358		QueryKind = ValueQuery,359	>;360361	/// List of collection admins362	#[pallet::storage]363	pub type IsAdmin<T: Config> = StorageNMap<364		Key = (365			Key<Blake2_128Concat, CollectionId>,366			Key<Blake2_128Concat, T::CrossAccountId>,367		),368		Value = bool,369		QueryKind = ValueQuery,370	>;371372	/// Allowlisted collection users373	#[pallet::storage]374	pub type Allowlist<T: Config> = StorageNMap<375		Key = (376			Key<Blake2_128Concat, CollectionId>,377			Key<Blake2_128Concat, T::CrossAccountId>,378		),379		Value = bool,380		QueryKind = ValueQuery,381	>;382383	/// Not used by code, exists only to provide some types to metadata384	#[pallet::storage]385	pub type DummyStorageValue<T> =386		StorageValue<Value = (CollectionStats, CollectionId, TokenId), QueryKind = OptionQuery>;387}388389impl<T: Config> Pallet<T> {390	/// Ethereum receiver 0x0000000000000000000000000000000000000000 is reserved, and shouldn't own tokens391	pub fn ensure_correct_receiver(receiver: &T::CrossAccountId) -> DispatchResult {392		ensure!(393			&T::CrossAccountId::from_eth(H160([0; 20])) != receiver,394			<Error<T>>::AddressIsZero395		);396		Ok(())397	}398	pub fn adminlist(collection: CollectionId) -> Vec<T::CrossAccountId> {399		<IsAdmin<T>>::iter_prefix((collection,))400			.map(|(a, _)| a)401			.collect()402	}403	pub fn allowlist(collection: CollectionId) -> Vec<T::CrossAccountId> {404		<Allowlist<T>>::iter_prefix((collection,))405			.map(|(a, _)| a)406			.collect()407	}408	pub fn allowed(collection: CollectionId, user: T::CrossAccountId) -> bool {409		<Allowlist<T>>::get((collection, user))410	}411	pub fn collection_stats() -> CollectionStats {412		let created = <CreatedCollectionCount<T>>::get();413		let destroyed = <DestroyedCollectionCount<T>>::get();414		CollectionStats {415			created: created.0,416			destroyed: destroyed.0,417			alive: created.0 - destroyed.0,418		}419	}420}421422impl<T: Config> Pallet<T> {423	pub fn init_collection(424		owner: T::AccountId,425		data: CreateCollectionData<T::AccountId>,426	) -> Result<CollectionId, DispatchError> {427		{428			ensure!(429				data.token_prefix.len() <= MAX_TOKEN_PREFIX_LENGTH as usize,430				Error::<T>::CollectionTokenPrefixLimitExceeded431			);432		}433434		let created_count = <CreatedCollectionCount<T>>::get()435			.0436			.checked_add(1)437			.ok_or(ArithmeticError::Overflow)?;438		let destroyed_count = <DestroyedCollectionCount<T>>::get().0;439		let id = CollectionId(created_count);440441		// bound Total number of collections442		ensure!(443			created_count - destroyed_count <= COLLECTION_NUMBER_LIMIT,444			<Error<T>>::TotalCollectionsLimitExceeded445		);446447		// =========448449		let collection = Collection {450			owner: owner.clone(),451			name: data.name,452			mode: data.mode.clone(),453			mint_mode: false,454			access: data.access.unwrap_or_default(),455			description: data.description,456			token_prefix: data.token_prefix,457			offchain_schema: data.offchain_schema,458			schema_version: data.schema_version.unwrap_or_default(),459			sponsorship: data460				.pending_sponsor461				.map(SponsorshipState::Unconfirmed)462				.unwrap_or_default(),463			variable_on_chain_schema: data.variable_on_chain_schema,464			const_on_chain_schema: data.const_on_chain_schema,465			limits: data466				.limits467				.map(|limits| Self::clamp_limits(data.mode.clone(), &Default::default(), limits))468				.unwrap_or_else(|| Ok(CollectionLimits::default()))?,469			meta_update_permission: data.meta_update_permission.unwrap_or_default(),470		};471472		// Take a (non-refundable) deposit of collection creation473		{474			let mut imbalance =475				<<<T as Config>::Currency as Currency<T::AccountId>>::PositiveImbalance>::zero();476			imbalance.subsume(477				<<T as Config>::Currency as Currency<T::AccountId>>::deposit_creating(478					&T::TreasuryAccountId::get(),479					T::CollectionCreationPrice::get(),480				),481			);482			<T as Config>::Currency::settle(483				&owner,484				imbalance,485				WithdrawReasons::TRANSFER,486				ExistenceRequirement::KeepAlive,487			)488			.map_err(|_| Error::<T>::NotSufficientFounds)?;489		}490491		<CreatedCollectionCount<T>>::put(created_count);492		<Pallet<T>>::deposit_event(Event::CollectionCreated(id, data.mode.id(), owner.clone()));493		<CollectionById<T>>::insert(id, collection);494		Ok(id)495	}496497	pub fn destroy_collection(498		collection: CollectionHandle<T>,499		sender: &T::CrossAccountId,500	) -> DispatchResult {501		ensure!(502			collection.limits.owner_can_destroy(),503			<Error<T>>::NoPermission,504		);505		collection.check_is_owner(sender)?;506507		let destroyed_collections = <DestroyedCollectionCount<T>>::get()508			.0509			.checked_add(1)510			.ok_or(ArithmeticError::Overflow)?;511512		// =========513514		<DestroyedCollectionCount<T>>::put(destroyed_collections);515		<CollectionById<T>>::remove(collection.id);516		<AdminAmount<T>>::remove(collection.id);517		<IsAdmin<T>>::remove_prefix((collection.id,), None);518		<Allowlist<T>>::remove_prefix((collection.id,), None);519520		<Pallet<T>>::deposit_event(Event::CollectionDestroyed(collection.id));521		Ok(())522	}523524	pub fn toggle_allowlist(525		collection: &CollectionHandle<T>,526		sender: &T::CrossAccountId,527		user: &T::CrossAccountId,528		allowed: bool,529	) -> DispatchResult {530		collection.check_is_owner_or_admin(sender)?;531532		// =========533534		if allowed {535			<Allowlist<T>>::insert((collection.id, user), true);536		} else {537			<Allowlist<T>>::remove((collection.id, user));538		}539540		Ok(())541	}542543	pub fn toggle_admin(544		collection: &CollectionHandle<T>,545		sender: &T::CrossAccountId,546		user: &T::CrossAccountId,547		admin: bool,548	) -> DispatchResult {549		collection.check_is_owner_or_admin(sender)?;550551		let was_admin = <IsAdmin<T>>::get((collection.id, user));552		if was_admin == admin {553			return Ok(());554		}555		let amount = <AdminAmount<T>>::get(collection.id);556557		if admin {558			let amount = amount559				.checked_add(1)560				.ok_or(<Error<T>>::CollectionAdminCountExceeded)?;561			ensure!(562				amount <= Self::collection_admins_limit(),563				<Error<T>>::CollectionAdminCountExceeded,564			);565566			// =========567568			<AdminAmount<T>>::insert(collection.id, amount);569			<IsAdmin<T>>::insert((collection.id, user), true);570		} else {571			<AdminAmount<T>>::insert(collection.id, amount.saturating_sub(1));572			<IsAdmin<T>>::remove((collection.id, user));573		}574575		Ok(())576	}577578	pub fn clamp_limits(579		mode: CollectionMode,580		old_limit: &CollectionLimits,581		mut new_limit: CollectionLimits,582	) -> Result<CollectionLimits, DispatchError> {583		macro_rules! limit_default {584				($old:ident, $new:ident, $($field:ident $(($arg:expr))? => $check:expr),* $(,)?) => {{585					$(586						if let Some($new) = $new.$field {587							let $old = $old.$field($($arg)?);588							let _ = $new;589							let _ = $old;590							$check591						} else {592							$new.$field = $old.$field593						}594					)*595				}};596			}597598		limit_default!(old_limit, new_limit,599			account_token_ownership_limit => ensure!(600				new_limit <= MAX_TOKEN_OWNERSHIP,601				<Error<T>>::CollectionLimitBoundsExceeded,602			),603			sponsor_transfer_timeout(match mode {604				CollectionMode::NFT => NFT_SPONSOR_TRANSFER_TIMEOUT,605				CollectionMode::Fungible(_) => FUNGIBLE_SPONSOR_TRANSFER_TIMEOUT,606				CollectionMode::ReFungible => REFUNGIBLE_SPONSOR_TRANSFER_TIMEOUT,607			}) => ensure!(608				new_limit <= MAX_SPONSOR_TIMEOUT,609				<Error<T>>::CollectionLimitBoundsExceeded,610			),611			sponsored_data_size => ensure!(612				new_limit <= CUSTOM_DATA_LIMIT,613				<Error<T>>::CollectionLimitBoundsExceeded,614			),615			token_limit => ensure!(616				old_limit >= new_limit && new_limit > 0,617				<Error<T>>::CollectionTokenLimitExceeded618			),619			owner_can_transfer => ensure!(620				old_limit || !new_limit,621				<Error<T>>::OwnerPermissionsCantBeReverted,622			),623			owner_can_destroy => ensure!(624				old_limit || !new_limit,625				<Error<T>>::OwnerPermissionsCantBeReverted,626			),627			sponsored_data_rate_limit => {},628			transfers_enabled => {},629		);630		Ok(new_limit)631	}632}633634#[macro_export]635macro_rules! unsupported {636	() => {637		Err(<Error<T>>::UnsupportedOperation.into())638	};639}640641/// Worst cases642pub trait CommonWeightInfo<CrossAccountId> {643	fn create_item() -> Weight;644	fn create_multiple_items(amount: u32) -> Weight;645	fn create_multiple_items_ex(cost: &CreateItemExData<CrossAccountId>) -> Weight;646	fn burn_item() -> Weight;647	fn transfer() -> Weight;648	fn approve() -> Weight;649	fn transfer_from() -> Weight;650	fn burn_from() -> Weight;651	fn set_variable_metadata(bytes: u32) -> Weight;652}653654pub trait CommonCollectionOperations<T: Config> {655	fn create_item(656		&self,657		sender: T::CrossAccountId,658		to: T::CrossAccountId,659		data: CreateItemData,660	) -> DispatchResultWithPostInfo;661	fn create_multiple_items(662		&self,663		sender: T::CrossAccountId,664		to: T::CrossAccountId,665		data: Vec<CreateItemData>,666	) -> DispatchResultWithPostInfo;667	fn create_multiple_items_ex(668		&self,669		sender: T::CrossAccountId,670		data: CreateItemExData<T::CrossAccountId>,671	) -> DispatchResultWithPostInfo;672	fn burn_item(673		&self,674		sender: T::CrossAccountId,675		token: TokenId,676		amount: u128,677	) -> DispatchResultWithPostInfo;678679	fn transfer(680		&self,681		sender: T::CrossAccountId,682		to: T::CrossAccountId,683		token: TokenId,684		amount: u128,685	) -> DispatchResultWithPostInfo;686	fn approve(687		&self,688		sender: T::CrossAccountId,689		spender: T::CrossAccountId,690		token: TokenId,691		amount: u128,692	) -> DispatchResultWithPostInfo;693	fn transfer_from(694		&self,695		sender: T::CrossAccountId,696		from: T::CrossAccountId,697		to: T::CrossAccountId,698		token: TokenId,699		amount: u128,700	) -> DispatchResultWithPostInfo;701	fn burn_from(702		&self,703		sender: T::CrossAccountId,704		from: T::CrossAccountId,705		token: TokenId,706		amount: u128,707	) -> DispatchResultWithPostInfo;708709	fn set_variable_metadata(710		&self,711		sender: T::CrossAccountId,712		token: TokenId,713		data: BoundedVec<u8, CustomDataLimit>,714	) -> DispatchResultWithPostInfo;715716	fn account_tokens(&self, account: T::CrossAccountId) -> Vec<TokenId>;717	fn token_exists(&self, token: TokenId) -> bool;718	fn last_token_id(&self) -> TokenId;719720	fn token_owner(&self, token: TokenId) -> Option<T::CrossAccountId>;721	fn const_metadata(&self, token: TokenId) -> Vec<u8>;722	fn variable_metadata(&self, token: TokenId) -> Vec<u8>;723724	/// How many tokens collection contains (Applicable to nonfungible/refungible)725	fn collection_tokens(&self) -> u32;726	/// Amount of different tokens account has (Applicable to nonfungible/refungible)727	fn account_balance(&self, account: T::CrossAccountId) -> u32;728	/// Amount of specific token account have (Applicable to fungible/refungible)729	fn balance(&self, account: T::CrossAccountId, token: TokenId) -> u128;730	fn allowance(731		&self,732		sender: T::CrossAccountId,733		spender: T::CrossAccountId,734		token: TokenId,735	) -> u128;736}737738// Flexible enough for implementing CommonCollectionOperations739pub fn with_weight(res: DispatchResult, weight: Weight) -> DispatchResultWithPostInfo {740	let post_info = PostDispatchInfo {741		actual_weight: Some(weight),742		pays_fee: Pays::Yes,743	};744	match res {745		Ok(()) => Ok(post_info),746		Err(error) => Err(DispatchErrorWithPostInfo { post_info, error }),747	}748}