git.delta.rocks / unique-network / refs/commits / 22251a0f47f9

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 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};41pub mod account;42#[cfg(feature = "runtime-benchmarks")]43pub mod benchmarking;44pub mod erc;45pub mod eth;4647#[must_use = "Should call submit_logs or save, otherwise some data will be lost for evm side"]48pub struct CollectionHandle<T: Config> {49	pub id: CollectionId,50	collection: Collection<T::AccountId>,51	pub recorder: SubstrateRecorder<T>,52}53impl<T: Config> WithRecorder<T> for CollectionHandle<T> {54	fn recorder(&self) -> &SubstrateRecorder<T> {55		&self.recorder56	}57	fn into_recorder(self) -> SubstrateRecorder<T> {58		self.recorder59	}60}61impl<T: Config> CollectionHandle<T> {62	pub fn new_with_gas_limit(id: CollectionId, gas_limit: u64) -> Option<Self> {63		<CollectionById<T>>::get(id).map(|collection| Self {64			id,65			collection,66			recorder: SubstrateRecorder::new(eth::collection_id_to_address(id), gas_limit),67		})68	}69	pub fn new(id: CollectionId) -> Option<Self> {70		Self::new_with_gas_limit(id, u64::MAX)71	}72	pub fn try_get(id: CollectionId) -> Result<Self, DispatchError> {73		Ok(Self::new(id).ok_or(<Error<T>>::CollectionNotFound)?)74	}75	pub fn log_mirrored(&self, log: impl evm_coder::ToLog) {76		self.recorder.log_mirrored(log)77	}78	pub fn log_direct(&self, log: impl evm_coder::ToLog) {79		self.recorder.log_direct(log)80	}81	pub fn consume_store_reads(&self, reads: u64) -> evm_coder::execution::Result<()> {82		self.recorder83			.consume_gas(T::GasWeightMapping::weight_to_gas(84				<T as frame_system::Config>::DbWeight::get()85					.read86					.saturating_mul(reads),87			))88	}89	pub fn consume_store_writes(&self, writes: u64) -> evm_coder::execution::Result<()> {90		self.recorder91			.consume_gas(T::GasWeightMapping::weight_to_gas(92				<T as frame_system::Config>::DbWeight::get()93					.write94					.saturating_mul(writes),95			))96	}97	pub fn submit_logs(self) {98		self.recorder.submit_logs()99	}100	pub fn save(self) -> DispatchResult {101		self.recorder.submit_logs();102		<CollectionById<T>>::insert(self.id, self.collection);103		Ok(())104	}105}106impl<T: Config> Deref for CollectionHandle<T> {107	type Target = Collection<T::AccountId>;108109	fn deref(&self) -> &Self::Target {110		&self.collection111	}112}113114impl<T: Config> DerefMut for CollectionHandle<T> {115	fn deref_mut(&mut self) -> &mut Self::Target {116		&mut self.collection117	}118}119120impl<T: Config> CollectionHandle<T> {121	pub fn check_is_owner(&self, subject: &T::CrossAccountId) -> DispatchResult {122		ensure!(*subject.as_sub() == self.owner, <Error<T>>::NoPermission);123		Ok(())124	}125	pub fn is_owner_or_admin(&self, subject: &T::CrossAccountId) -> bool {126		*subject.as_sub() == self.owner || <IsAdmin<T>>::get((self.id, subject))127	}128	pub fn check_is_owner_or_admin(&self, subject: &T::CrossAccountId) -> DispatchResult {129		ensure!(self.is_owner_or_admin(subject), <Error<T>>::NoPermission);130		Ok(())131	}132	pub fn ignores_allowance(&self, user: &T::CrossAccountId) -> bool {133		self.limits.owner_can_transfer() && self.is_owner_or_admin(user)134	}135	pub fn ignores_owned_amount(&self, user: &T::CrossAccountId) -> bool {136		self.limits.owner_can_transfer() && self.is_owner_or_admin(user)137	}138	pub fn check_allowlist(&self, user: &T::CrossAccountId) -> DispatchResult {139		ensure!(140			<Allowlist<T>>::get((self.id, user)),141			<Error<T>>::AddressNotInAllowlist142		);143		Ok(())144	}145146	pub fn check_can_update_meta(147		&self,148		subject: &T::CrossAccountId,149		item_owner: &T::CrossAccountId,150	) -> DispatchResult {151		match self.meta_update_permission {152			MetaUpdatePermission::ItemOwner => {153				ensure!(subject == item_owner, <Error<T>>::NoPermission);154				Ok(())155			}156			MetaUpdatePermission::Admin => self.check_is_owner_or_admin(subject),157			MetaUpdatePermission::None => fail!(<Error<T>>::NoPermission),158		}159	}160}161162#[frame_support::pallet]163pub mod pallet {164	use super::*;165	use frame_support::{Blake2_128Concat, pallet_prelude::*, storage::Key};166	use account::CrossAccountId;167	use frame_support::traits::Currency;168	use up_data_structs::TokenId;169	use scale_info::TypeInfo;170171	#[pallet::config]172	pub trait Config: frame_system::Config + pallet_evm_coder_substrate::Config + TypeInfo {173		type Event: IsType<<Self as frame_system::Config>::Event> + From<Event<Self>>;174175		type CrossAccountId: CrossAccountId<Self::AccountId>;176177		type EvmAddressMapping: pallet_evm::AddressMapping<Self::AccountId>;178		type EvmBackwardsAddressMapping: up_evm_mapping::EvmBackwardsAddressMapping<Self::AccountId>;179180		type Currency: Currency<Self::AccountId>;181182		#[pallet::constant]183		type CollectionCreationPrice: Get<184			<<Self as Config>::Currency as Currency<Self::AccountId>>::Balance,185		>;186187		type TreasuryAccountId: Get<Self::AccountId>;188	}189190	#[pallet::pallet]191	#[pallet::generate_store(pub(super) trait Store)]192	pub struct Pallet<T>(_);193194	#[pallet::extra_constants]195	impl<T: Config> Pallet<T> {196		pub fn collection_admins_limit() -> u32 {197			COLLECTION_ADMINS_LIMIT198		}199	}200201	#[pallet::event]202	#[pallet::generate_deposit(pub fn deposit_event)]203	pub enum Event<T: Config> {204		/// New collection was created205		///206		/// # Arguments207		///208		/// * collection_id: Globally unique identifier of newly created collection.209		///210		/// * mode: [CollectionMode] converted into u8.211		///212		/// * account_id: Collection owner.213		CollectionCreated(CollectionId, u8, T::AccountId),214215		/// New collection was destroyed216		///217		/// # Arguments218		///219		/// * collection_id: Globally unique identifier of collection.220		CollectionDestroyed(CollectionId),221222		/// New item was created.223		///224		/// # Arguments225		///226		/// * collection_id: Id of the collection where item was created.227		///228		/// * item_id: Id of an item. Unique within the collection.229		///230		/// * recipient: Owner of newly created item231		///232		/// * amount: Always 1 for NFT233		ItemCreated(CollectionId, TokenId, T::CrossAccountId, u128),234235		/// Collection item was burned.236		///237		/// # Arguments238		///239		/// * collection_id.240		///241		/// * item_id: Identifier of burned NFT.242		///243		/// * owner: which user has destroyed its tokens244		///245		/// * amount: Always 1 for NFT246		ItemDestroyed(CollectionId, TokenId, T::CrossAccountId, u128),247248		/// Item was transferred249		///250		/// * collection_id: Id of collection to which item is belong251		///252		/// * item_id: Id of an item253		///254		/// * sender: Original owner of item255		///256		/// * recipient: New owner of item257		///258		/// * amount: Always 1 for NFT259		Transfer(260			CollectionId,261			TokenId,262			T::CrossAccountId,263			T::CrossAccountId,264			u128,265		),266267		/// * collection_id268		///269		/// * item_id270		///271		/// * sender272		///273		/// * spender274		///275		/// * amount276		Approved(277			CollectionId,278			TokenId,279			T::CrossAccountId,280			T::CrossAccountId,281			u128,282		),283	}284285	#[pallet::error]286	pub enum Error<T> {287		/// This collection does not exist.288		CollectionNotFound,289		/// Sender parameter and item owner must be equal.290		MustBeTokenOwner,291		/// No permission to perform action292		NoPermission,293		/// Collection is not in mint mode.294		PublicMintingNotAllowed,295		/// Address is not in allow list.296		AddressNotInAllowlist,297298		/// Collection name can not be longer than 63 char.299		CollectionNameLimitExceeded,300		/// Collection description can not be longer than 255 char.301		CollectionDescriptionLimitExceeded,302		/// Token prefix can not be longer than 15 char.303		CollectionTokenPrefixLimitExceeded,304		/// Total collections bound exceeded.305		TotalCollectionsLimitExceeded,306		/// variable_data exceeded data limit.307		TokenVariableDataLimitExceeded,308		/// Exceeded max admin count309		CollectionAdminCountExceeded,310		/// Collection limit bounds per collection exceeded311		CollectionLimitBoundsExceeded,312		/// Tried to enable permissions which are only permitted to be disabled313		OwnerPermissionsCantBeReverted,314315		/// Collection settings not allowing items transferring316		TransferNotAllowed,317		/// Account token limit exceeded per collection318		AccountTokenLimitExceeded,319		/// Collection token limit exceeded320		CollectionTokenLimitExceeded,321		/// Metadata flag frozen322		MetadataFlagFrozen,323324		/// Item not exists.325		TokenNotFound,326		/// Item balance not enough.327		TokenValueTooLow,328		/// Requested value more than approved.329		ApprovedValueTooLow,330		/// Tried to approve more than owned331		CantApproveMoreThanOwned,332333		/// Can't transfer tokens to ethereum zero address334		AddressIsZero,335		/// Target collection doesn't supports this operation336		UnsupportedOperation,337338		/// Not sufficient founds to perform action339		NotSufficientFounds,340	}341342	#[pallet::storage]343	pub type CreatedCollectionCount<T> = StorageValue<Value = CollectionId, QueryKind = ValueQuery>;344	#[pallet::storage]345	pub type DestroyedCollectionCount<T> =346		StorageValue<Value = CollectionId, QueryKind = ValueQuery>;347348	/// Collection info349	#[pallet::storage]350	pub type CollectionById<T> = StorageMap<351		Hasher = Blake2_128Concat,352		Key = CollectionId,353		Value = Collection<<T as frame_system::Config>::AccountId>,354		QueryKind = OptionQuery,355	>;356357	#[pallet::storage]358	pub type AdminAmount<T> = StorageMap<359		Hasher = Blake2_128Concat,360		Key = CollectionId,361		Value = u32,362		QueryKind = ValueQuery,363	>;364365	/// List of collection admins366	#[pallet::storage]367	pub type IsAdmin<T: Config> = StorageNMap<368		Key = (369			Key<Blake2_128Concat, CollectionId>,370			Key<Blake2_128Concat, T::CrossAccountId>,371		),372		Value = bool,373		QueryKind = ValueQuery,374	>;375376	/// Allowlisted collection users377	#[pallet::storage]378	pub type Allowlist<T: Config> = StorageNMap<379		Key = (380			Key<Blake2_128Concat, CollectionId>,381			Key<Blake2_128Concat, T::CrossAccountId>,382		),383		Value = bool,384		QueryKind = ValueQuery,385	>;386387	/// Not used by code, exists only to provide some types to metadata388	#[pallet::storage]389	pub type DummyStorageValue<T> =390		StorageValue<Value = (CollectionStats, CollectionId, TokenId), QueryKind = OptionQuery>;391}392393impl<T: Config> Pallet<T> {394	/// Ethereum receiver 0x0000000000000000000000000000000000000000 is reserved, and shouldn't own tokens395	pub fn ensure_correct_receiver(receiver: &T::CrossAccountId) -> DispatchResult {396		ensure!(397			&T::CrossAccountId::from_eth(H160([0; 20])) != receiver,398			<Error<T>>::AddressIsZero399		);400		Ok(())401	}402	pub fn adminlist(collection: CollectionId) -> Vec<T::CrossAccountId> {403		<IsAdmin<T>>::iter_prefix((collection,))404			.map(|(a, _)| a)405			.collect()406	}407	pub fn allowlist(collection: CollectionId) -> Vec<T::CrossAccountId> {408		<Allowlist<T>>::iter_prefix((collection,))409			.map(|(a, _)| a)410			.collect()411	}412	pub fn allowed(collection: CollectionId, user: T::CrossAccountId) -> bool {413		<Allowlist<T>>::get((collection, user))414	}415	pub fn collection_stats() -> CollectionStats {416		let created = <CreatedCollectionCount<T>>::get();417		let destroyed = <DestroyedCollectionCount<T>>::get();418		CollectionStats {419			created: created.0,420			destroyed: destroyed.0,421			alive: created.0 - destroyed.0,422		}423	}424}425426impl<T: Config> Pallet<T> {427	pub fn init_collection(428		owner: T::AccountId,429		data: CreateCollectionData<T::AccountId>,430	) -> Result<CollectionId, DispatchError> {431		{432			ensure!(433				data.token_prefix.len() <= MAX_TOKEN_PREFIX_LENGTH as usize,434				Error::<T>::CollectionTokenPrefixLimitExceeded435			);436		}437438		let created_count = <CreatedCollectionCount<T>>::get()439			.0440			.checked_add(1)441			.ok_or(ArithmeticError::Overflow)?;442		let destroyed_count = <DestroyedCollectionCount<T>>::get().0;443		let id = CollectionId(created_count);444445		// bound Total number of collections446		ensure!(447			created_count - destroyed_count <= COLLECTION_NUMBER_LIMIT,448			<Error<T>>::TotalCollectionsLimitExceeded449		);450451		// =========452453		let collection = Collection {454			owner: owner.clone(),455			name: data.name,456			mode: data.mode.clone(),457			mint_mode: false,458			access: data.access.unwrap_or_default(),459			description: data.description,460			token_prefix: data.token_prefix,461			offchain_schema: data.offchain_schema,462			schema_version: data.schema_version.unwrap_or_default(),463			sponsorship: data464				.pending_sponsor465				.map(SponsorshipState::Unconfirmed)466				.unwrap_or_default(),467			variable_on_chain_schema: data.variable_on_chain_schema,468			const_on_chain_schema: data.const_on_chain_schema,469			limits: data470				.limits471				.map(|limits| Self::clamp_limits(data.mode.clone(), &Default::default(), limits))472				.unwrap_or_else(|| Ok(CollectionLimits::default()))?,473			meta_update_permission: data.meta_update_permission.unwrap_or_default(),474		};475476		// Take a (non-refundable) deposit of collection creation477		{478			let mut imbalance =479				<<<T as Config>::Currency as Currency<T::AccountId>>::PositiveImbalance>::zero();480			imbalance.subsume(481				<<T as Config>::Currency as Currency<T::AccountId>>::deposit_creating(482					&T::TreasuryAccountId::get(),483					T::CollectionCreationPrice::get(),484				),485			);486			<T as Config>::Currency::settle(487				&owner,488				imbalance,489				WithdrawReasons::TRANSFER,490				ExistenceRequirement::KeepAlive,491			)492			.map_err(|_| Error::<T>::NotSufficientFounds)?;493		}494495		<CreatedCollectionCount<T>>::put(created_count);496		<Pallet<T>>::deposit_event(Event::CollectionCreated(id, data.mode.id(), owner.clone()));497		<CollectionById<T>>::insert(id, collection);498		Ok(id)499	}500501	pub fn destroy_collection(502		collection: CollectionHandle<T>,503		sender: &T::CrossAccountId,504	) -> DispatchResult {505		ensure!(506			collection.limits.owner_can_destroy(),507			<Error<T>>::NoPermission,508		);509		collection.check_is_owner(sender)?;510511		let destroyed_collections = <DestroyedCollectionCount<T>>::get()512			.0513			.checked_add(1)514			.ok_or(ArithmeticError::Overflow)?;515516		// =========517518		<DestroyedCollectionCount<T>>::put(destroyed_collections);519		<CollectionById<T>>::remove(collection.id);520		<AdminAmount<T>>::remove(collection.id);521		<IsAdmin<T>>::remove_prefix((collection.id,), None);522		<Allowlist<T>>::remove_prefix((collection.id,), None);523524		<Pallet<T>>::deposit_event(Event::CollectionDestroyed(collection.id));525		Ok(())526	}527528	pub fn toggle_allowlist(529		collection: &CollectionHandle<T>,530		sender: &T::CrossAccountId,531		user: &T::CrossAccountId,532		allowed: bool,533	) -> DispatchResult {534		collection.check_is_owner_or_admin(sender)?;535536		// =========537538		if allowed {539			<Allowlist<T>>::insert((collection.id, user), true);540		} else {541			<Allowlist<T>>::remove((collection.id, user));542		}543544		Ok(())545	}546547	pub fn toggle_admin(548		collection: &CollectionHandle<T>,549		sender: &T::CrossAccountId,550		user: &T::CrossAccountId,551		admin: bool,552	) -> DispatchResult {553		collection.check_is_owner_or_admin(sender)?;554555		let was_admin = <IsAdmin<T>>::get((collection.id, user));556		if was_admin == admin {557			return Ok(());558		}559		let amount = <AdminAmount<T>>::get(collection.id);560561		if admin {562			let amount = amount563				.checked_add(1)564				.ok_or(<Error<T>>::CollectionAdminCountExceeded)?;565			ensure!(566				amount <= Self::collection_admins_limit(),567				<Error<T>>::CollectionAdminCountExceeded,568			);569570			// =========571572			<AdminAmount<T>>::insert(collection.id, amount);573			<IsAdmin<T>>::insert((collection.id, user), true);574		} else {575			<AdminAmount<T>>::insert(collection.id, amount.saturating_sub(1));576			<IsAdmin<T>>::remove((collection.id, user));577		}578579		Ok(())580	}581582	pub fn clamp_limits(583		mode: CollectionMode,584		old_limit: &CollectionLimits,585		mut new_limit: CollectionLimits,586	) -> Result<CollectionLimits, DispatchError> {587		macro_rules! limit_default {588				($old:ident, $new:ident, $($field:ident $(($arg:expr))? => $check:expr),* $(,)?) => {{589					$(590						if let Some($new) = $new.$field {591							let $old = $old.$field($($arg)?);592							let _ = $new;593							let _ = $old;594							$check595						} else {596							$new.$field = $old.$field597						}598					)*599				}};600			}601602		limit_default!(old_limit, new_limit,603			account_token_ownership_limit => ensure!(604				new_limit <= MAX_TOKEN_OWNERSHIP,605				<Error<T>>::CollectionLimitBoundsExceeded,606			),607			sponsor_transfer_timeout(match mode {608				CollectionMode::NFT => NFT_SPONSOR_TRANSFER_TIMEOUT,609				CollectionMode::Fungible(_) => FUNGIBLE_SPONSOR_TRANSFER_TIMEOUT,610				CollectionMode::ReFungible => REFUNGIBLE_SPONSOR_TRANSFER_TIMEOUT,611			}) => ensure!(612				new_limit <= MAX_SPONSOR_TIMEOUT,613				<Error<T>>::CollectionLimitBoundsExceeded,614			),615			sponsored_data_size => ensure!(616				new_limit <= CUSTOM_DATA_LIMIT,617				<Error<T>>::CollectionLimitBoundsExceeded,618			),619			token_limit => ensure!(620				old_limit >= new_limit && new_limit > 0,621				<Error<T>>::CollectionTokenLimitExceeded622			),623			owner_can_transfer => ensure!(624				old_limit || !new_limit,625				<Error<T>>::OwnerPermissionsCantBeReverted,626			),627			owner_can_destroy => ensure!(628				old_limit || !new_limit,629				<Error<T>>::OwnerPermissionsCantBeReverted,630			),631			sponsored_data_rate_limit => {},632			transfers_enabled => {},633		);634		Ok(new_limit)635	}636}637638#[macro_export]639macro_rules! unsupported {640	() => {641		Err(<Error<T>>::UnsupportedOperation.into())642	};643}644645/// Worst cases646pub trait CommonWeightInfo<CrossAccountId> {647	fn create_item() -> Weight;648	fn create_multiple_items(amount: u32) -> Weight;649	fn create_multiple_items_ex(cost: &CreateItemExData<CrossAccountId>) -> Weight;650	fn burn_item() -> Weight;651	fn transfer() -> Weight;652	fn approve() -> Weight;653	fn transfer_from() -> Weight;654	fn burn_from() -> Weight;655	fn set_variable_metadata(bytes: u32) -> Weight;656}657658pub trait CommonCollectionOperations<T: Config> {659	fn create_item(660		&self,661		sender: T::CrossAccountId,662		to: T::CrossAccountId,663		data: CreateItemData,664	) -> DispatchResultWithPostInfo;665	fn create_multiple_items(666		&self,667		sender: T::CrossAccountId,668		to: T::CrossAccountId,669		data: Vec<CreateItemData>,670	) -> DispatchResultWithPostInfo;671	fn create_multiple_items_ex(672		&self,673		sender: T::CrossAccountId,674		data: CreateItemExData<T::CrossAccountId>,675	) -> DispatchResultWithPostInfo;676	fn burn_item(677		&self,678		sender: T::CrossAccountId,679		token: TokenId,680		amount: u128,681	) -> DispatchResultWithPostInfo;682683	fn transfer(684		&self,685		sender: T::CrossAccountId,686		to: T::CrossAccountId,687		token: TokenId,688		amount: u128,689	) -> DispatchResultWithPostInfo;690	fn approve(691		&self,692		sender: T::CrossAccountId,693		spender: T::CrossAccountId,694		token: TokenId,695		amount: u128,696	) -> DispatchResultWithPostInfo;697	fn transfer_from(698		&self,699		sender: T::CrossAccountId,700		from: T::CrossAccountId,701		to: T::CrossAccountId,702		token: TokenId,703		amount: u128,704	) -> DispatchResultWithPostInfo;705	fn burn_from(706		&self,707		sender: T::CrossAccountId,708		from: T::CrossAccountId,709		token: TokenId,710		amount: u128,711	) -> DispatchResultWithPostInfo;712713	fn set_variable_metadata(714		&self,715		sender: T::CrossAccountId,716		token: TokenId,717		data: BoundedVec<u8, CustomDataLimit>,718	) -> DispatchResultWithPostInfo;719720	fn account_tokens(&self, account: T::CrossAccountId) -> Vec<TokenId>;721	fn token_exists(&self, token: TokenId) -> bool;722	fn last_token_id(&self) -> TokenId;723724	fn token_owner(&self, token: TokenId) -> Option<T::CrossAccountId>;725	fn const_metadata(&self, token: TokenId) -> Vec<u8>;726	fn variable_metadata(&self, token: TokenId) -> Vec<u8>;727728	/// How many tokens collection contains (Applicable to nonfungible/refungible)729	fn collection_tokens(&self) -> u32;730	/// Amount of different tokens account has (Applicable to nonfungible/refungible)731	fn account_balance(&self, account: T::CrossAccountId) -> u32;732	/// Amount of specific token account have (Applicable to fungible/refungible)733	fn balance(&self, account: T::CrossAccountId, token: TokenId) -> u128;734	fn allowance(735		&self,736		sender: T::CrossAccountId,737		spender: T::CrossAccountId,738		token: TokenId,739	) -> u128;740}741742// Flexible enough for implementing CommonCollectionOperations743pub fn with_weight(res: DispatchResult, weight: Weight) -> DispatchResultWithPostInfo {744	let post_info = PostDispatchInfo {745		actual_weight: Some(weight),746		pays_fee: Pays::Yes,747	};748	match res {749		Ok(()) => Ok(post_info),750		Err(error) => Err(DispatchErrorWithPostInfo { post_info, error }),751	}752}