git.delta.rocks / unique-network / refs/commits / 6be1bb56d5e4

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, Weight, PostDispatchInfo},25	ensure, fail,26	traits::{Imbalance, Get, Currency, WithdrawReasons, ExistenceRequirement},27	BoundedVec,28	weights::Pays,29};30use pallet_evm::GasWeightMapping;31use up_data_structs::{32	COLLECTION_NUMBER_LIMIT, Collection, RpcCollection, CollectionId, CreateItemData, MAX_TOKEN_PREFIX_LENGTH,33	COLLECTION_ADMINS_LIMIT, MetaUpdatePermission, TokenId, CollectionStats, MAX_TOKEN_OWNERSHIP,34	CollectionMode, 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, budget::Budget, COLLECTION_FIELD_LIMIT, CollectionField,37};38pub use pallet::*;39use sp_core::H160;40use sp_runtime::{ArithmeticError, DispatchError, DispatchResult};41#[cfg(feature = "runtime-benchmarks")]42pub mod benchmarking;43pub mod dispatch;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 pallet_evm::account;167	use dispatch::CollectionDispatch;168	use frame_support::{Blake2_128Concat, pallet_prelude::*, storage::Key, traits::StorageVersion};169	use frame_system::pallet_prelude::*;170	use frame_support::traits::Currency;171	use up_data_structs::{TokenId, mapping::TokenAddressMapping};172	use scale_info::TypeInfo;173	use up_evm_mapping::CrossAccountId;174175	#[pallet::config]176	pub trait Config:177		frame_system::Config + pallet_evm_coder_substrate::Config + TypeInfo + account::Config178	{179		type Event: IsType<<Self as frame_system::Config>::Event> + From<Event<Self>>;180181		type Currency: Currency<Self::AccountId>;182183		#[pallet::constant]184		type CollectionCreationPrice: Get<185			<<Self as Config>::Currency as Currency<Self::AccountId>>::Balance,186		>;187		type CollectionDispatch: CollectionDispatch<Self>;188189		type TreasuryAccountId: Get<Self::AccountId>;190191		type EvmTokenAddressMapping: TokenAddressMapping<H160>;192		type CrossTokenAddressMapping: TokenAddressMapping<Self::CrossAccountId>;193	}194195	const STORAGE_VERSION: StorageVersion = StorageVersion::new(1);196197	#[pallet::pallet]198	#[pallet::storage_version(STORAGE_VERSION)]199	#[pallet::generate_store(pub(super) trait Store)]200	pub struct Pallet<T>(_);201202	#[pallet::extra_constants]203	impl<T: Config> Pallet<T> {204		pub fn collection_admins_limit() -> u32 {205			COLLECTION_ADMINS_LIMIT206		}207	}208209	#[pallet::event]210	#[pallet::generate_deposit(pub fn deposit_event)]211	pub enum Event<T: Config> {212		/// New collection was created213		///214		/// # Arguments215		///216		/// * collection_id: Globally unique identifier of newly created collection.217		///218		/// * mode: [CollectionMode] converted into u8.219		///220		/// * account_id: Collection owner.221		CollectionCreated(CollectionId, u8, T::AccountId),222223		/// New collection was destroyed224		///225		/// # Arguments226		///227		/// * collection_id: Globally unique identifier of collection.228		CollectionDestroyed(CollectionId),229230		/// New item was created.231		///232		/// # Arguments233		///234		/// * collection_id: Id of the collection where item was created.235		///236		/// * item_id: Id of an item. Unique within the collection.237		///238		/// * recipient: Owner of newly created item239		///240		/// * amount: Always 1 for NFT241		ItemCreated(CollectionId, TokenId, T::CrossAccountId, u128),242243		/// Collection item was burned.244		///245		/// # Arguments246		///247		/// * collection_id.248		///249		/// * item_id: Identifier of burned NFT.250		///251		/// * owner: which user has destroyed its tokens252		///253		/// * amount: Always 1 for NFT254		ItemDestroyed(CollectionId, TokenId, T::CrossAccountId, u128),255256		/// Item was transferred257		///258		/// * collection_id: Id of collection to which item is belong259		///260		/// * item_id: Id of an item261		///262		/// * sender: Original owner of item263		///264		/// * recipient: New owner of item265		///266		/// * amount: Always 1 for NFT267		Transfer(268			CollectionId,269			TokenId,270			T::CrossAccountId,271			T::CrossAccountId,272			u128,273		),274275		/// * collection_id276		///277		/// * item_id278		///279		/// * sender280		///281		/// * spender282		///283		/// * amount284		Approved(285			CollectionId,286			TokenId,287			T::CrossAccountId,288			T::CrossAccountId,289			u128,290		),291	}292293	#[pallet::error]294	pub enum Error<T> {295		/// This collection does not exist.296		CollectionNotFound,297		/// Sender parameter and item owner must be equal.298		MustBeTokenOwner,299		/// No permission to perform action300		NoPermission,301		/// Collection is not in mint mode.302		PublicMintingNotAllowed,303		/// Address is not in allow list.304		AddressNotInAllowlist,305306		/// Collection name can not be longer than 63 char.307		CollectionNameLimitExceeded,308		/// Collection description can not be longer than 255 char.309		CollectionDescriptionLimitExceeded,310		/// Token prefix can not be longer than 15 char.311		CollectionTokenPrefixLimitExceeded,312		/// Total collections bound exceeded.313		TotalCollectionsLimitExceeded,314		/// variable_data exceeded data limit.315		TokenVariableDataLimitExceeded,316		/// Exceeded max admin count317		CollectionAdminCountExceeded,318		/// Collection limit bounds per collection exceeded319		CollectionLimitBoundsExceeded,320		/// Tried to enable permissions which are only permitted to be disabled321		OwnerPermissionsCantBeReverted,322323		/// Collection settings not allowing items transferring324		TransferNotAllowed,325		/// Account token limit exceeded per collection326		AccountTokenLimitExceeded,327		/// Collection token limit exceeded328		CollectionTokenLimitExceeded,329		/// Metadata flag frozen330		MetadataFlagFrozen,331332		/// Item not exists.333		TokenNotFound,334		/// Item balance not enough.335		TokenValueTooLow,336		/// Requested value more than approved.337		ApprovedValueTooLow,338		/// Tried to approve more than owned339		CantApproveMoreThanOwned,340341		/// Can't transfer tokens to ethereum zero address342		AddressIsZero,343		/// Target collection doesn't supports this operation344		UnsupportedOperation,345346		/// Not sufficient founds to perform action347		NotSufficientFounds,348349		/// Collection has nesting disabled350		NestingIsDisabled,351		/// Only owner may nest tokens under this collection352		OnlyOwnerAllowedToNest,353		/// Only tokens from specific collections may nest tokens under this354		SourceCollectionIsNotAllowedToNest,355356		/// Tried to store more data than allowed in collection field357		CollectionFieldSizeExceeded,358	}359360	#[pallet::storage]361	pub type CreatedCollectionCount<T> = StorageValue<Value = CollectionId, QueryKind = ValueQuery>;362	#[pallet::storage]363	pub type DestroyedCollectionCount<T> =364		StorageValue<Value = CollectionId, QueryKind = ValueQuery>;365366	/// Collection info367	#[pallet::storage]368	pub type CollectionById<T> = StorageMap<369		Hasher = Blake2_128Concat,370		Key = CollectionId,371		Value = Collection<<T as frame_system::Config>::AccountId>,372		QueryKind = OptionQuery,373	>;374375	/// Large variable-size collection fields are extracted here376	#[pallet::storage]377	pub type CollectionData<T> = StorageNMap<378		Key = (379			Key<Twox64Concat, CollectionId>,380			Key<Twox64Concat, CollectionField>,381		),382		Value = BoundedVec<u8, ConstU32<COLLECTION_FIELD_LIMIT>>,383		QueryKind = ValueQuery,384	>;385386	#[pallet::storage]387	pub type AdminAmount<T> = StorageMap<388		Hasher = Blake2_128Concat,389		Key = CollectionId,390		Value = u32,391		QueryKind = ValueQuery,392	>;393394	/// List of collection admins395	#[pallet::storage]396	pub type IsAdmin<T: Config> = StorageNMap<397		Key = (398			Key<Blake2_128Concat, CollectionId>,399			Key<Blake2_128Concat, T::CrossAccountId>,400		),401		Value = bool,402		QueryKind = ValueQuery,403	>;404405	/// Allowlisted collection users406	#[pallet::storage]407	pub type Allowlist<T: Config> = StorageNMap<408		Key = (409			Key<Blake2_128Concat, CollectionId>,410			Key<Blake2_128Concat, T::CrossAccountId>,411		),412		Value = bool,413		QueryKind = ValueQuery,414	>;415416	/// Not used by code, exists only to provide some types to metadata417	#[pallet::storage]418	pub type DummyStorageValue<T> =419		StorageValue<Value = (CollectionStats, CollectionId, TokenId), QueryKind = OptionQuery>;420421	#[pallet::hooks]422	impl<T: Config> Hooks<BlockNumberFor<T>> for Pallet<T> {423		fn on_runtime_upgrade() -> Weight {424			if StorageVersion::get::<Pallet<T>>() < StorageVersion::new(1) {425				use up_data_structs::{CollectionVersion1, CollectionVersion2};426				<CollectionById<T>>::translate::<CollectionVersion1<T::AccountId>, _>(|id, v| {427					Self::set_field_raw(428						id,429						CollectionField::OffchainSchema,430						v.offchain_schema.clone().into_inner(),431					)432					.expect("data has lower bounds than field");433					Self::set_field_raw(434						id,435						CollectionField::VariableOnChainSchema,436						v.variable_on_chain_schema.clone().into_inner(),437					)438					.expect("data has lower bounds than field");439					Self::set_field_raw(440						id,441						CollectionField::ConstOnChainSchema,442						v.const_on_chain_schema.clone().into_inner(),443					)444					.expect("data has lower bounds than field");445446					Some(CollectionVersion2::from(v))447				});448			}449450			0451		}452	}453}454455impl<T: Config> Pallet<T> {456	/// Ethereum receiver 0x0000000000000000000000000000000000000000 is reserved, and shouldn't own tokens457	pub fn ensure_correct_receiver(receiver: &T::CrossAccountId) -> DispatchResult {458		ensure!(459			&T::CrossAccountId::from_eth(H160([0; 20])) != receiver,460			<Error<T>>::AddressIsZero461		);462		Ok(())463	}464	pub fn adminlist(collection: CollectionId) -> Vec<T::CrossAccountId> {465		<IsAdmin<T>>::iter_prefix((collection,))466			.map(|(a, _)| a)467			.collect()468	}469	pub fn allowlist(collection: CollectionId) -> Vec<T::CrossAccountId> {470		<Allowlist<T>>::iter_prefix((collection,))471			.map(|(a, _)| a)472			.collect()473	}474	pub fn allowed(collection: CollectionId, user: T::CrossAccountId) -> bool {475		<Allowlist<T>>::get((collection, user))476	}477	pub fn collection_stats() -> CollectionStats {478		let created = <CreatedCollectionCount<T>>::get();479		let destroyed = <DestroyedCollectionCount<T>>::get();480		CollectionStats {481			created: created.0,482			destroyed: destroyed.0,483			alive: created.0 - destroyed.0,484		}485	}486487	pub fn effective_collection_limits(collection: CollectionId) -> Option<CollectionLimits> {488		let collection = <CollectionById<T>>::get(collection);489		if collection.is_none() {490			return None;491		}492493		let collection = collection.unwrap();494		let limits = collection.limits;495		let effective_limits = CollectionLimits {496			account_token_ownership_limit: Some(limits.account_token_ownership_limit()),497			sponsored_data_size: Some(limits.sponsored_data_size()),498			sponsored_data_rate_limit: Some(499				limits500					.sponsored_data_rate_limit501					.unwrap_or(SponsoringRateLimit::SponsoringDisabled),502			),503			token_limit: Some(limits.token_limit()),504			sponsor_transfer_timeout: Some(limits.sponsor_transfer_timeout(505				match collection.mode {506					CollectionMode::NFT => NFT_SPONSOR_TRANSFER_TIMEOUT,507					CollectionMode::Fungible(_) => FUNGIBLE_SPONSOR_TRANSFER_TIMEOUT,508					CollectionMode::ReFungible => REFUNGIBLE_SPONSOR_TRANSFER_TIMEOUT,509				},510			)),511			sponsor_approve_timeout: Some(limits.sponsor_approve_timeout()),512			owner_can_transfer: Some(limits.owner_can_transfer()),513			owner_can_destroy: Some(limits.owner_can_destroy()),514			transfers_enabled: Some(limits.transfers_enabled()),515		};516517		Some(effective_limits)518	}519520	pub fn rpc_collection(collection: CollectionId) -> Option<RpcCollection<T::AccountId>> {521		let Collection {522			name,523			description,524			owner,525			mode,526			access,527			token_prefix,528			mint_mode,529			schema_version,530			sponsorship,531			limits,532			meta_update_permission,533		} = <CollectionById<T>>::get(collection)?;534		Some(RpcCollection {535			name: name.into_inner(),536			description: description.into_inner(),537			owner,538			mode,539			access,540			token_prefix: token_prefix.into_inner(),541			mint_mode,542			schema_version,543			sponsorship,544			limits,545			meta_update_permission,546			offchain_schema: <CollectionData<T>>::get((547				collection,548				CollectionField::OffchainSchema,549			))550			.into_inner(),551			const_on_chain_schema: <CollectionData<T>>::get((552				collection,553				CollectionField::ConstOnChainSchema,554			))555			.into_inner(),556			variable_on_chain_schema: <CollectionData<T>>::get((557				collection,558				CollectionField::VariableOnChainSchema,559			))560			.into_inner(),561		})562	}563}564565impl<T: Config> Pallet<T> {566	pub fn init_collection(567		owner: T::AccountId,568		data: CreateCollectionData<T::AccountId>,569	) -> Result<CollectionId, DispatchError> {570		{571			ensure!(572				data.token_prefix.len() <= MAX_TOKEN_PREFIX_LENGTH as usize,573				Error::<T>::CollectionTokenPrefixLimitExceeded574			);575		}576577		let created_count = <CreatedCollectionCount<T>>::get()578			.0579			.checked_add(1)580			.ok_or(ArithmeticError::Overflow)?;581		let destroyed_count = <DestroyedCollectionCount<T>>::get().0;582		let id = CollectionId(created_count);583584		// bound Total number of collections585		ensure!(586			created_count - destroyed_count <= COLLECTION_NUMBER_LIMIT,587			<Error<T>>::TotalCollectionsLimitExceeded588		);589590		// =========591592		let collection = Collection {593			owner: owner.clone(),594			name: data.name,595			mode: data.mode.clone(),596			mint_mode: false,597			access: data.access.unwrap_or_default(),598			description: data.description,599			token_prefix: data.token_prefix,600			schema_version: data.schema_version.unwrap_or_default(),601			sponsorship: data602				.pending_sponsor603				.map(SponsorshipState::Unconfirmed)604				.unwrap_or_default(),605			limits: data606				.limits607				.map(|limits| Self::clamp_limits(data.mode.clone(), &Default::default(), limits))608				.unwrap_or_else(|| Ok(CollectionLimits::default()))?,609			meta_update_permission: data.meta_update_permission.unwrap_or_default(),610		};611612		// Take a (non-refundable) deposit of collection creation613		{614			let mut imbalance =615				<<<T as Config>::Currency as Currency<T::AccountId>>::PositiveImbalance>::zero();616			imbalance.subsume(617				<<T as Config>::Currency as Currency<T::AccountId>>::deposit_creating(618					&T::TreasuryAccountId::get(),619					T::CollectionCreationPrice::get(),620				),621			);622			<T as Config>::Currency::settle(623				&owner,624				imbalance,625				WithdrawReasons::TRANSFER,626				ExistenceRequirement::KeepAlive,627			)628			.map_err(|_| Error::<T>::NotSufficientFounds)?;629		}630631		<CreatedCollectionCount<T>>::put(created_count);632		<Pallet<T>>::deposit_event(Event::CollectionCreated(id, data.mode.id(), owner.clone()));633		<CollectionById<T>>::insert(id, collection);634		Self::set_field_raw(635			id,636			CollectionField::OffchainSchema,637			data.offchain_schema.into_inner(),638		)639		.expect("data has lower bounds than field");640		Self::set_field_raw(641			id,642			CollectionField::VariableOnChainSchema,643			data.variable_on_chain_schema.into_inner(),644		)645		.expect("data has lower bounds than field");646		Self::set_field_raw(647			id,648			CollectionField::ConstOnChainSchema,649			data.const_on_chain_schema.into_inner(),650		)651		.expect("data has lower bounds than field");652		Ok(id)653	}654655	pub fn destroy_collection(656		collection: CollectionHandle<T>,657		sender: &T::CrossAccountId,658	) -> DispatchResult {659		ensure!(660			collection.limits.owner_can_destroy(),661			<Error<T>>::NoPermission,662		);663		collection.check_is_owner(sender)?;664665		let destroyed_collections = <DestroyedCollectionCount<T>>::get()666			.0667			.checked_add(1)668			.ok_or(ArithmeticError::Overflow)?;669670		// =========671672		<DestroyedCollectionCount<T>>::put(destroyed_collections);673		<CollectionById<T>>::remove(collection.id);674		<CollectionData<T>>::remove_prefix((collection.id,), None);675		<AdminAmount<T>>::remove(collection.id);676		<IsAdmin<T>>::remove_prefix((collection.id,), None);677		<Allowlist<T>>::remove_prefix((collection.id,), None);678679		<Pallet<T>>::deposit_event(Event::CollectionDestroyed(collection.id));680		Ok(())681	}682683	fn set_field_raw(684		collection_id: CollectionId,685		field: CollectionField,686		value: Vec<u8>,687	) -> DispatchResult {688		if !value.is_empty() {689			<CollectionData<T>>::insert(690				(collection_id, field),691				BoundedVec::try_from(value).map_err(|_| <Error<T>>::CollectionFieldSizeExceeded)?,692			)693		} else {694			<CollectionData<T>>::remove((collection_id, field));695		}696		Ok(())697	}698699	pub fn set_field(700		collection: &CollectionHandle<T>,701		sender: &T::CrossAccountId,702		field: CollectionField,703		value: Vec<u8>,704	) -> DispatchResult {705		collection.check_is_owner_or_admin(sender)?;706707		// =========708709		Self::set_field_raw(collection.id, field, value)710	}711712	pub fn toggle_allowlist(713		collection: &CollectionHandle<T>,714		sender: &T::CrossAccountId,715		user: &T::CrossAccountId,716		allowed: bool,717	) -> DispatchResult {718		collection.check_is_owner_or_admin(sender)?;719720		// =========721722		if allowed {723			<Allowlist<T>>::insert((collection.id, user), true);724		} else {725			<Allowlist<T>>::remove((collection.id, user));726		}727728		Ok(())729	}730731	pub fn toggle_admin(732		collection: &CollectionHandle<T>,733		sender: &T::CrossAccountId,734		user: &T::CrossAccountId,735		admin: bool,736	) -> DispatchResult {737		collection.check_is_owner_or_admin(sender)?;738739		let was_admin = <IsAdmin<T>>::get((collection.id, user));740		if was_admin == admin {741			return Ok(());742		}743		let amount = <AdminAmount<T>>::get(collection.id);744745		if admin {746			let amount = amount747				.checked_add(1)748				.ok_or(<Error<T>>::CollectionAdminCountExceeded)?;749			ensure!(750				amount <= Self::collection_admins_limit(),751				<Error<T>>::CollectionAdminCountExceeded,752			);753754			// =========755756			<AdminAmount<T>>::insert(collection.id, amount);757			<IsAdmin<T>>::insert((collection.id, user), true);758		} else {759			<AdminAmount<T>>::insert(collection.id, amount.saturating_sub(1));760			<IsAdmin<T>>::remove((collection.id, user));761		}762763		Ok(())764	}765766	pub fn clamp_limits(767		mode: CollectionMode,768		old_limit: &CollectionLimits,769		mut new_limit: CollectionLimits,770	) -> Result<CollectionLimits, DispatchError> {771		macro_rules! limit_default {772				($old:ident, $new:ident, $($field:ident $(($arg:expr))? => $check:expr),* $(,)?) => {{773					$(774						if let Some($new) = $new.$field {775							let $old = $old.$field($($arg)?);776							let _ = $new;777							let _ = $old;778							$check779						} else {780							$new.$field = $old.$field781						}782					)*783				}};784			}785786		limit_default!(old_limit, new_limit,787			account_token_ownership_limit => ensure!(788				new_limit <= MAX_TOKEN_OWNERSHIP,789				<Error<T>>::CollectionLimitBoundsExceeded,790			),791			sponsor_transfer_timeout(match mode {792				CollectionMode::NFT => NFT_SPONSOR_TRANSFER_TIMEOUT,793				CollectionMode::Fungible(_) => FUNGIBLE_SPONSOR_TRANSFER_TIMEOUT,794				CollectionMode::ReFungible => REFUNGIBLE_SPONSOR_TRANSFER_TIMEOUT,795			}) => ensure!(796				new_limit <= MAX_SPONSOR_TIMEOUT,797				<Error<T>>::CollectionLimitBoundsExceeded,798			),799			sponsored_data_size => ensure!(800				new_limit <= CUSTOM_DATA_LIMIT,801				<Error<T>>::CollectionLimitBoundsExceeded,802			),803			token_limit => ensure!(804				old_limit >= new_limit && new_limit > 0,805				<Error<T>>::CollectionTokenLimitExceeded806			),807			owner_can_transfer => ensure!(808				old_limit || !new_limit,809				<Error<T>>::OwnerPermissionsCantBeReverted,810			),811			owner_can_destroy => ensure!(812				old_limit || !new_limit,813				<Error<T>>::OwnerPermissionsCantBeReverted,814			),815			sponsored_data_rate_limit => {},816			transfers_enabled => {},817		);818		Ok(new_limit)819	}820}821822#[macro_export]823macro_rules! unsupported {824	() => {825		Err(<Error<T>>::UnsupportedOperation.into())826	};827}828829/// Worst cases830pub trait CommonWeightInfo<CrossAccountId> {831	fn create_item() -> Weight;832	fn create_multiple_items(amount: u32) -> Weight;833	fn create_multiple_items_ex(cost: &CreateItemExData<CrossAccountId>) -> Weight;834	fn burn_item() -> Weight;835	fn transfer() -> Weight;836	fn approve() -> Weight;837	fn transfer_from() -> Weight;838	fn burn_from() -> Weight;839	fn set_variable_metadata(bytes: u32) -> Weight;840}841842pub trait CommonCollectionOperations<T: Config> {843	fn create_item(844		&self,845		sender: T::CrossAccountId,846		to: T::CrossAccountId,847		data: CreateItemData,848		nesting_budget: &dyn Budget,849	) -> DispatchResultWithPostInfo;850	fn create_multiple_items(851		&self,852		sender: T::CrossAccountId,853		to: T::CrossAccountId,854		data: Vec<CreateItemData>,855		nesting_budget: &dyn Budget,856	) -> DispatchResultWithPostInfo;857	fn create_multiple_items_ex(858		&self,859		sender: T::CrossAccountId,860		data: CreateItemExData<T::CrossAccountId>,861		nesting_budget: &dyn Budget,862	) -> DispatchResultWithPostInfo;863	fn burn_item(864		&self,865		sender: T::CrossAccountId,866		token: TokenId,867		amount: u128,868	) -> DispatchResultWithPostInfo;869870	fn transfer(871		&self,872		sender: T::CrossAccountId,873		to: T::CrossAccountId,874		token: TokenId,875		amount: u128,876		nesting_budget: &dyn Budget,877	) -> DispatchResultWithPostInfo;878	fn approve(879		&self,880		sender: T::CrossAccountId,881		spender: T::CrossAccountId,882		token: TokenId,883		amount: u128,884	) -> DispatchResultWithPostInfo;885	fn transfer_from(886		&self,887		sender: T::CrossAccountId,888		from: T::CrossAccountId,889		to: T::CrossAccountId,890		token: TokenId,891		amount: u128,892		nesting_budget: &dyn Budget,893	) -> DispatchResultWithPostInfo;894	fn burn_from(895		&self,896		sender: T::CrossAccountId,897		from: T::CrossAccountId,898		token: TokenId,899		amount: u128,900		nesting_budget: &dyn Budget,901	) -> DispatchResultWithPostInfo;902903	fn set_variable_metadata(904		&self,905		sender: T::CrossAccountId,906		token: TokenId,907		data: BoundedVec<u8, CustomDataLimit>,908	) -> DispatchResultWithPostInfo;909910	fn check_nesting(911		&self,912		sender: T::CrossAccountId,913		from: CollectionId,914		under: TokenId,915		budget: &dyn Budget,916	) -> DispatchResult;917918	fn account_tokens(&self, account: T::CrossAccountId) -> Vec<TokenId>;919	fn token_exists(&self, token: TokenId) -> bool;920	fn last_token_id(&self) -> TokenId;921922	fn token_owner(&self, token: TokenId) -> Option<T::CrossAccountId>;923	fn const_metadata(&self, token: TokenId) -> Vec<u8>;924	fn variable_metadata(&self, token: TokenId) -> Vec<u8>;925926	/// How many tokens collection contains (Applicable to nonfungible/refungible)927	fn collection_tokens(&self) -> u32;928	/// Amount of different tokens account has (Applicable to nonfungible/refungible)929	fn account_balance(&self, account: T::CrossAccountId) -> u32;930	/// Amount of specific token account have (Applicable to fungible/refungible)931	fn balance(&self, account: T::CrossAccountId, token: TokenId) -> u128;932	fn allowance(933		&self,934		sender: T::CrossAccountId,935		spender: T::CrossAccountId,936		token: TokenId,937	) -> u128;938}939940// Flexible enough for implementing CommonCollectionOperations941pub fn with_weight(res: DispatchResult, weight: Weight) -> DispatchResultWithPostInfo {942	let post_info = PostDispatchInfo {943		actual_weight: Some(weight),944		pays_fee: Pays::Yes,945	};946	match res {947		Ok(()) => Ok(post_info),948		Err(error) => Err(DispatchErrorWithPostInfo { post_info, error }),949	}950}