git.delta.rocks / unique-network / refs/commits / af948bcf5f24

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, SponsoringRateLimit,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	}424425	pub fn effective_collection_limits(collection: CollectionId) -> Option<CollectionLimits> {426		let collection = <CollectionById<T>>::get(collection);427		if collection.is_none() {428			return None;429		}430431		let limits = collection.unwrap().limits;432		let effective_limits = CollectionLimits {433			account_token_ownership_limit: Some(limits.account_token_ownership_limit()),434			sponsored_data_size: Some(limits.sponsored_data_size()),435			sponsored_data_rate_limit: Some(436				limits437					.sponsored_data_rate_limit438					.unwrap_or(SponsoringRateLimit::SponsoringDisabled),439			),440			token_limit: Some(limits.token_limit()),441			sponsor_transfer_timeout: Some(limits.sponsor_transfer_timeout(MAX_SPONSOR_TIMEOUT)),442			sponsor_approve_timeout: Some(limits.sponsor_approve_timeout()),443			owner_can_transfer: Some(limits.owner_can_transfer()),444			owner_can_destroy: Some(limits.owner_can_destroy()),445			transfers_enabled: Some(limits.transfers_enabled()),446		};447448		Some(effective_limits)449	}450}451452impl<T: Config> Pallet<T> {453	pub fn init_collection(454		owner: T::AccountId,455		data: CreateCollectionData<T::AccountId>,456	) -> Result<CollectionId, DispatchError> {457		{458			ensure!(459				data.token_prefix.len() <= MAX_TOKEN_PREFIX_LENGTH as usize,460				Error::<T>::CollectionTokenPrefixLimitExceeded461			);462		}463464		let created_count = <CreatedCollectionCount<T>>::get()465			.0466			.checked_add(1)467			.ok_or(ArithmeticError::Overflow)?;468		let destroyed_count = <DestroyedCollectionCount<T>>::get().0;469		let id = CollectionId(created_count);470471		// bound Total number of collections472		ensure!(473			created_count - destroyed_count <= COLLECTION_NUMBER_LIMIT,474			<Error<T>>::TotalCollectionsLimitExceeded475		);476477		// =========478479		let collection = Collection {480			owner: owner.clone(),481			name: data.name,482			mode: data.mode.clone(),483			mint_mode: false,484			access: data.access.unwrap_or_default(),485			description: data.description,486			token_prefix: data.token_prefix,487			offchain_schema: data.offchain_schema,488			schema_version: data.schema_version.unwrap_or_default(),489			sponsorship: data490				.pending_sponsor491				.map(SponsorshipState::Unconfirmed)492				.unwrap_or_default(),493			variable_on_chain_schema: data.variable_on_chain_schema,494			const_on_chain_schema: data.const_on_chain_schema,495			limits: data496				.limits497				.map(|limits| Self::clamp_limits(data.mode.clone(), &Default::default(), limits))498				.unwrap_or_else(|| Ok(CollectionLimits::default()))?,499			meta_update_permission: data.meta_update_permission.unwrap_or_default(),500		};501502		// Take a (non-refundable) deposit of collection creation503		{504			let mut imbalance =505				<<<T as Config>::Currency as Currency<T::AccountId>>::PositiveImbalance>::zero();506			imbalance.subsume(507				<<T as Config>::Currency as Currency<T::AccountId>>::deposit_creating(508					&T::TreasuryAccountId::get(),509					T::CollectionCreationPrice::get(),510				),511			);512			<T as Config>::Currency::settle(513				&owner,514				imbalance,515				WithdrawReasons::TRANSFER,516				ExistenceRequirement::KeepAlive,517			)518			.map_err(|_| Error::<T>::NotSufficientFounds)?;519		}520521		<CreatedCollectionCount<T>>::put(created_count);522		<Pallet<T>>::deposit_event(Event::CollectionCreated(id, data.mode.id(), owner.clone()));523		<CollectionById<T>>::insert(id, collection);524		Ok(id)525	}526527	pub fn destroy_collection(528		collection: CollectionHandle<T>,529		sender: &T::CrossAccountId,530	) -> DispatchResult {531		ensure!(532			collection.limits.owner_can_destroy(),533			<Error<T>>::NoPermission,534		);535		collection.check_is_owner(sender)?;536537		let destroyed_collections = <DestroyedCollectionCount<T>>::get()538			.0539			.checked_add(1)540			.ok_or(ArithmeticError::Overflow)?;541542		// =========543544		<DestroyedCollectionCount<T>>::put(destroyed_collections);545		<CollectionById<T>>::remove(collection.id);546		<AdminAmount<T>>::remove(collection.id);547		<IsAdmin<T>>::remove_prefix((collection.id,), None);548		<Allowlist<T>>::remove_prefix((collection.id,), None);549550		<Pallet<T>>::deposit_event(Event::CollectionDestroyed(collection.id));551		Ok(())552	}553554	pub fn toggle_allowlist(555		collection: &CollectionHandle<T>,556		sender: &T::CrossAccountId,557		user: &T::CrossAccountId,558		allowed: bool,559	) -> DispatchResult {560		collection.check_is_owner_or_admin(sender)?;561562		// =========563564		if allowed {565			<Allowlist<T>>::insert((collection.id, user), true);566		} else {567			<Allowlist<T>>::remove((collection.id, user));568		}569570		Ok(())571	}572573	pub fn toggle_admin(574		collection: &CollectionHandle<T>,575		sender: &T::CrossAccountId,576		user: &T::CrossAccountId,577		admin: bool,578	) -> DispatchResult {579		collection.check_is_owner_or_admin(sender)?;580581		let was_admin = <IsAdmin<T>>::get((collection.id, user));582		if was_admin == admin {583			return Ok(());584		}585		let amount = <AdminAmount<T>>::get(collection.id);586587		if admin {588			let amount = amount589				.checked_add(1)590				.ok_or(<Error<T>>::CollectionAdminCountExceeded)?;591			ensure!(592				amount <= Self::collection_admins_limit(),593				<Error<T>>::CollectionAdminCountExceeded,594			);595596			// =========597598			<AdminAmount<T>>::insert(collection.id, amount);599			<IsAdmin<T>>::insert((collection.id, user), true);600		} else {601			<AdminAmount<T>>::insert(collection.id, amount.saturating_sub(1));602			<IsAdmin<T>>::remove((collection.id, user));603		}604605		Ok(())606	}607608	pub fn clamp_limits(609		mode: CollectionMode,610		old_limit: &CollectionLimits,611		mut new_limit: CollectionLimits,612	) -> Result<CollectionLimits, DispatchError> {613		macro_rules! limit_default {614				($old:ident, $new:ident, $($field:ident $(($arg:expr))? => $check:expr),* $(,)?) => {{615					$(616						if let Some($new) = $new.$field {617							let $old = $old.$field($($arg)?);618							let _ = $new;619							let _ = $old;620							$check621						} else {622							$new.$field = $old.$field623						}624					)*625				}};626			}627628		limit_default!(old_limit, new_limit,629			account_token_ownership_limit => ensure!(630				new_limit <= MAX_TOKEN_OWNERSHIP,631				<Error<T>>::CollectionLimitBoundsExceeded,632			),633			sponsor_transfer_timeout(match mode {634				CollectionMode::NFT => NFT_SPONSOR_TRANSFER_TIMEOUT,635				CollectionMode::Fungible(_) => FUNGIBLE_SPONSOR_TRANSFER_TIMEOUT,636				CollectionMode::ReFungible => REFUNGIBLE_SPONSOR_TRANSFER_TIMEOUT,637			}) => ensure!(638				new_limit <= MAX_SPONSOR_TIMEOUT,639				<Error<T>>::CollectionLimitBoundsExceeded,640			),641			sponsored_data_size => ensure!(642				new_limit <= CUSTOM_DATA_LIMIT,643				<Error<T>>::CollectionLimitBoundsExceeded,644			),645			token_limit => ensure!(646				old_limit >= new_limit && new_limit > 0,647				<Error<T>>::CollectionTokenLimitExceeded648			),649			owner_can_transfer => ensure!(650				old_limit || !new_limit,651				<Error<T>>::OwnerPermissionsCantBeReverted,652			),653			owner_can_destroy => ensure!(654				old_limit || !new_limit,655				<Error<T>>::OwnerPermissionsCantBeReverted,656			),657			sponsored_data_rate_limit => {},658			transfers_enabled => {},659		);660		Ok(new_limit)661	}662}663664#[macro_export]665macro_rules! unsupported {666	() => {667		Err(<Error<T>>::UnsupportedOperation.into())668	};669}670671/// Worst cases672pub trait CommonWeightInfo<CrossAccountId> {673	fn create_item() -> Weight;674	fn create_multiple_items(amount: u32) -> Weight;675	fn create_multiple_items_ex(cost: &CreateItemExData<CrossAccountId>) -> Weight;676	fn burn_item() -> Weight;677	fn transfer() -> Weight;678	fn approve() -> Weight;679	fn transfer_from() -> Weight;680	fn burn_from() -> Weight;681	fn set_variable_metadata(bytes: u32) -> Weight;682}683684pub trait CommonCollectionOperations<T: Config> {685	fn create_item(686		&self,687		sender: T::CrossAccountId,688		to: T::CrossAccountId,689		data: CreateItemData,690	) -> DispatchResultWithPostInfo;691	fn create_multiple_items(692		&self,693		sender: T::CrossAccountId,694		to: T::CrossAccountId,695		data: Vec<CreateItemData>,696	) -> DispatchResultWithPostInfo;697	fn create_multiple_items_ex(698		&self,699		sender: T::CrossAccountId,700		data: CreateItemExData<T::CrossAccountId>,701	) -> DispatchResultWithPostInfo;702	fn burn_item(703		&self,704		sender: T::CrossAccountId,705		token: TokenId,706		amount: u128,707	) -> DispatchResultWithPostInfo;708709	fn transfer(710		&self,711		sender: T::CrossAccountId,712		to: T::CrossAccountId,713		token: TokenId,714		amount: u128,715	) -> DispatchResultWithPostInfo;716	fn approve(717		&self,718		sender: T::CrossAccountId,719		spender: T::CrossAccountId,720		token: TokenId,721		amount: u128,722	) -> DispatchResultWithPostInfo;723	fn transfer_from(724		&self,725		sender: T::CrossAccountId,726		from: T::CrossAccountId,727		to: T::CrossAccountId,728		token: TokenId,729		amount: u128,730	) -> DispatchResultWithPostInfo;731	fn burn_from(732		&self,733		sender: T::CrossAccountId,734		from: T::CrossAccountId,735		token: TokenId,736		amount: u128,737	) -> DispatchResultWithPostInfo;738739	fn set_variable_metadata(740		&self,741		sender: T::CrossAccountId,742		token: TokenId,743		data: BoundedVec<u8, CustomDataLimit>,744	) -> DispatchResultWithPostInfo;745746	fn account_tokens(&self, account: T::CrossAccountId) -> Vec<TokenId>;747	fn token_exists(&self, token: TokenId) -> bool;748	fn last_token_id(&self) -> TokenId;749750	fn token_owner(&self, token: TokenId) -> Option<T::CrossAccountId>;751	fn const_metadata(&self, token: TokenId) -> Vec<u8>;752	fn variable_metadata(&self, token: TokenId) -> Vec<u8>;753754	/// How many tokens collection contains (Applicable to nonfungible/refungible)755	fn collection_tokens(&self) -> u32;756	/// Amount of different tokens account has (Applicable to nonfungible/refungible)757	fn account_balance(&self, account: T::CrossAccountId) -> u32;758	/// Amount of specific token account have (Applicable to fungible/refungible)759	fn balance(&self, account: T::CrossAccountId, token: TokenId) -> u128;760	fn allowance(761		&self,762		sender: T::CrossAccountId,763		spender: T::CrossAccountId,764		token: TokenId,765	) -> u128;766}767768// Flexible enough for implementing CommonCollectionOperations769pub fn with_weight(res: DispatchResult, weight: Weight) -> DispatchResultWithPostInfo {770	let post_info = PostDispatchInfo {771		actual_weight: Some(weight),772		pays_fee: Pays::Yes,773	};774	match res {775		Ok(()) => Ok(post_info),776		Err(error) => Err(DispatchErrorWithPostInfo { post_info, error }),777	}778}