git.delta.rocks / unique-network / refs/commits / 12a441c421f3

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//! # Nonfungible Pallet18//!19//! The Nonfungible pallet provides functionality for handling nonfungible collections and tokens.20//!21//! - [`Config`]22//! - [`NonfungibleHandle`]23//! - [`Pallet`]24//! - [`CommonWeights`](common::CommonWeights)25//!26//! ## Overview27//!28//! The Nonfungible pallet provides functions for:29//!30//! - NFT collection creation and removal31//! - Minting and burning of NFT tokens32//! - Retrieving account balances33//! - Transfering NFT tokens34//! - Setting and checking allowance for NFT tokens35//! - Setting properties and permissions for NFT collections and tokens36//! - Nesting and unnesting tokens37//!38//! ### Terminology39//!40//! - **NFT token:** Non fungible token.41//!42//! - **NFT Collection:** A collection of NFT tokens. All NFT tokens are part of a collection.43//!   Each collection can define it's own properties, properties for it's tokens and set of permissions.44//!45//! - **Balance:** Number of NFT tokens owned by an account46//!47//! - **Allowance:** NFT tokens owned by one account that another account is allowed to make operations on48//!49//! - **Burning:** The process of “deleting” a token from a collection and from50//!   an account balance of the owner.51//!52//! - **Nesting:** Setting up parent-child relationship between tokens. Nested tokens are inhereting53//!   owner from their parent. There could be multiple levels of nesting. Token couldn't be nested in54//!   it's child token i.e. parent-child relationship graph shouldn't have cycles.55//!56//! - **Properties:** Key-Values pairs. Token properties are attached to a token. Collection properties are57//!   attached to a collection. Set of permissions could be defined for each property.58//!59//! ### Implementations60//!61//! The Nonfungible pallet provides implementations for the following traits. If these traits provide62//! the functionality that you need, then you can avoid coupling with the Nonfungible pallet.63//!64//! - [`CommonWeightInfo`](pallet_common::CommonWeightInfo): Functions for retrieval of transaction weight65//! - [`CommonCollectionOperations`](pallet_common::CommonCollectionOperations): Functions for dealing66//!   with collections67//!68//! ## Interface69//!70//! ### Dispatchable Functions71//!72//! - `init_collection` - Create NFT collection. NFT collection can be configured to allow or deny access for73//!   some accounts.74//! - `destroy_collection` - Destroy exising NFT collection. There should be no tokens in the collection.75//! - `burn` - Burn NFT token owned by account.76//! - `transfer` - Transfer NFT token. Transfers should be enabled for NFT collection.77//!   Nests the NFT token if it is sent to another token.78//! - `create_item` - Mint NFT token in collection. Sender should have permission to mint tokens.79//! - `set_allowance` - Set allowance for another account.80//! - `set_token_property` - Set token property value.81//! - `delete_token_property` - Remove property from the token.82//! - `set_collection_properties` - Set collection properties.83//! - `delete_collection_properties` - Remove properties from the collection.84//! - `set_property_permission` - Set collection property permission.85//! - `set_token_property_permissions` - Set token property permissions.86//!87//! ## Assumptions88//!89//! * To perform operations on tokens sender should be in collection's allow list if collection access mode is `AllowList`.9091#![cfg_attr(not(feature = "std"), no_std)]9293use erc::ERC721Events;94use evm_coder::ToLog;95use frame_support::{96	BoundedVec, ensure, fail, transactional,97	storage::with_transaction,98	pallet_prelude::DispatchResultWithPostInfo,99	pallet_prelude::Weight,100	dispatch::{PostDispatchInfo, Pays},101};102use up_data_structs::{103	AccessMode, CollectionId, CustomDataLimit, TokenId, CreateCollectionData, CreateNftExData,104	mapping::TokenAddressMapping, budget::Budget, Property, PropertyKey, PropertyValue,105	PropertyKeyPermission, PropertyScope, TrySetProperty, TokenChild, AuxPropertyValue,106	PropertiesPermissionMap, TokenProperties as TokenPropertiesT,107};108use pallet_evm::{account::CrossAccountId, Pallet as PalletEvm};109use pallet_common::{110	Error as CommonError, Pallet as PalletCommon, Event as CommonEvent, CollectionHandle,111	eth::collection_id_to_address, SelfWeightOf as PalletCommonWeightOf,112	weights::WeightInfo as CommonWeightInfo, helpers::add_weight_to_post_info, SetPropertyMode,113};114use pallet_structure::{Pallet as PalletStructure, Error as StructureError};115use pallet_evm_coder_substrate::{SubstrateRecorder, WithRecorder};116use sp_core::{Get, H160};117use sp_runtime::{ArithmeticError, DispatchError, DispatchResult, TransactionOutcome};118use sp_std::{vec::Vec, vec, collections::btree_map::BTreeMap};119use core::ops::Deref;120use codec::{Encode, Decode, MaxEncodedLen};121use scale_info::TypeInfo;122123pub use pallet::*;124use weights::WeightInfo;125#[cfg(feature = "runtime-benchmarks")]126pub mod benchmarking;127pub mod common;128pub mod erc;129pub mod weights;130131pub type CreateItemData<T> = CreateNftExData<<T as pallet_evm::Config>::CrossAccountId>;132pub(crate) type SelfWeightOf<T> = <T as Config>::WeightInfo;133134/// Token data, stored independently from other data used to describe it135/// for the convenience of database access. Notably contains the owner account address.136#[struct_versioning::versioned(version = 2, upper)]137#[derive(Encode, Decode, TypeInfo, MaxEncodedLen)]138pub struct ItemData<CrossAccountId> {139	#[version(..2)]140	pub const_data: BoundedVec<u8, CustomDataLimit>,141142	#[version(..2)]143	pub variable_data: BoundedVec<u8, CustomDataLimit>,144145	pub owner: CrossAccountId,146}147148#[frame_support::pallet]149pub mod pallet {150	use super::*;151	use frame_support::{152		Blake2_128Concat, Twox64Concat, pallet_prelude::*, storage::Key, traits::StorageVersion,153	};154	use up_data_structs::{CollectionId, TokenId};155	use super::weights::WeightInfo;156157	#[pallet::error]158	pub enum Error<T> {159		/// Not Nonfungible item data used to mint in Nonfungible collection.160		NotNonfungibleDataUsedToMintFungibleCollectionToken,161		/// Used amount > 1 with NFT162		NonfungibleItemsHaveNoAmount,163		/// Unable to burn NFT with children164		CantBurnNftWithChildren,165	}166167	#[pallet::config]168	pub trait Config:169		frame_system::Config + pallet_common::Config + pallet_structure::Config + pallet_evm::Config170	{171		type WeightInfo: WeightInfo;172	}173174	const STORAGE_VERSION: StorageVersion = StorageVersion::new(1);175176	#[pallet::pallet]177	#[pallet::storage_version(STORAGE_VERSION)]178	pub struct Pallet<T>(_);179180	/// Total amount of minted tokens in a collection.181	#[pallet::storage]182	pub type TokensMinted<T: Config> =183		StorageMap<Hasher = Twox64Concat, Key = CollectionId, Value = u32, QueryKind = ValueQuery>;184185	/// Amount of burnt tokens in a collection.186	#[pallet::storage]187	pub type TokensBurnt<T: Config> =188		StorageMap<Hasher = Twox64Concat, Key = CollectionId, Value = u32, QueryKind = ValueQuery>;189190	/// Token data, used to partially describe a token.191	#[pallet::storage]192	pub type TokenData<T: Config> = StorageNMap<193		Key = (Key<Twox64Concat, CollectionId>, Key<Twox64Concat, TokenId>),194		Value = ItemData<T::CrossAccountId>,195		QueryKind = OptionQuery,196	>;197198	/// Map of key-value pairs, describing the metadata of a token.199	#[pallet::storage]200	#[pallet::getter(fn token_properties)]201	pub type TokenProperties<T: Config> = StorageNMap<202		Key = (Key<Twox64Concat, CollectionId>, Key<Twox64Concat, TokenId>),203		Value = TokenPropertiesT,204		QueryKind = ValueQuery,205	>;206207	/// Custom data of a token that is serialized to bytes,208	/// primarily reserved for on-chain operations,209	/// normally obscured from the external users.210	///211	/// Auxiliary properties are slightly different from212	/// usual [`TokenProperties`] due to an unlimited number213	/// and separately stored and written-to key-value pairs.214	///215	/// Currently unused.216	#[pallet::storage]217	#[pallet::getter(fn token_aux_property)]218	pub type TokenAuxProperties<T: Config> = StorageNMap<219		Key = (220			Key<Twox64Concat, CollectionId>,221			Key<Twox64Concat, TokenId>,222			Key<Twox64Concat, PropertyScope>,223			Key<Twox64Concat, PropertyKey>,224		),225		Value = AuxPropertyValue,226		QueryKind = OptionQuery,227	>;228229	/// Used to enumerate tokens owned by account.230	#[pallet::storage]231	pub type Owned<T: Config> = StorageNMap<232		Key = (233			Key<Twox64Concat, CollectionId>,234			Key<Blake2_128Concat, T::CrossAccountId>,235			Key<Twox64Concat, TokenId>,236		),237		Value = bool,238		QueryKind = ValueQuery,239	>;240241	/// Used to enumerate token's children.242	#[pallet::storage]243	#[pallet::getter(fn token_children)]244	pub type TokenChildren<T: Config> = StorageNMap<245		Key = (246			Key<Twox64Concat, CollectionId>,247			Key<Twox64Concat, TokenId>,248			Key<Twox64Concat, (CollectionId, TokenId)>,249		),250		Value = bool,251		QueryKind = ValueQuery,252	>;253254	/// Amount of tokens owned by an account in a collection.255	#[pallet::storage]256	pub type AccountBalance<T: Config> = StorageNMap<257		Key = (258			Key<Twox64Concat, CollectionId>,259			Key<Blake2_128Concat, T::CrossAccountId>,260		),261		Value = u32,262		QueryKind = ValueQuery,263	>;264265	/// Allowance set by a token owner for another user to perform one of certain transactions on a token.266	#[pallet::storage]267	pub type Allowance<T: Config> = StorageNMap<268		Key = (Key<Twox64Concat, CollectionId>, Key<Twox64Concat, TokenId>),269		Value = T::CrossAccountId,270		QueryKind = OptionQuery,271	>;272273	/// Operator set by a wallet owner that could perform certain transactions on all tokens in the wallet.274	#[pallet::storage]275	pub type CollectionAllowance<T: Config> = StorageNMap<276		Key = (277			Key<Twox64Concat, CollectionId>,278			Key<Blake2_128Concat, T::CrossAccountId>,279			Key<Blake2_128Concat, T::CrossAccountId>,280		),281		Value = bool,282		QueryKind = ValueQuery,283	>;284285	#[pallet::genesis_config]286	pub struct GenesisConfig<T>(PhantomData<T>);287288	#[cfg(feature = "std")]289	impl<T: Config> Default for GenesisConfig<T> {290		fn default() -> Self {291			Self(Default::default())292		}293	}294295	#[pallet::genesis_build]296	impl<T: Config> GenesisBuild<T> for GenesisConfig<T> {297		fn build(&self) {298			StorageVersion::new(1).put::<Pallet<T>>();299		}300	}301}302303pub struct NonfungibleHandle<T: Config>(pallet_common::CollectionHandle<T>);304impl<T: Config> NonfungibleHandle<T> {305	pub fn cast(inner: pallet_common::CollectionHandle<T>) -> Self {306		Self(inner)307	}308	pub fn into_inner(self) -> pallet_common::CollectionHandle<T> {309		self.0310	}311	pub fn common_mut(&mut self) -> &mut pallet_common::CollectionHandle<T> {312		&mut self.0313	}314}315316impl<T: Config> WithRecorder<T> for NonfungibleHandle<T> {317	fn recorder(&self) -> &SubstrateRecorder<T> {318		self.0.recorder()319	}320	fn into_recorder(self) -> SubstrateRecorder<T> {321		self.0.into_recorder()322	}323}324impl<T: Config> Deref for NonfungibleHandle<T> {325	type Target = pallet_common::CollectionHandle<T>;326327	fn deref(&self) -> &Self::Target {328		&self.0329	}330}331332impl<T: Config> Pallet<T> {333	/// Get number of NFT tokens in collection.334	pub fn total_supply(collection: &NonfungibleHandle<T>) -> u32 {335		<TokensMinted<T>>::get(collection.id) - <TokensBurnt<T>>::get(collection.id)336	}337338	/// Check that NFT token exists.339	///340	/// - `token`: Token ID.341	pub fn token_exists(collection: &NonfungibleHandle<T>, token: TokenId) -> bool {342		<TokenData<T>>::contains_key((collection.id, token))343	}344345	/// Set the token property with the scope.346	///347	/// - `property`: Contains key-value pair.348	pub fn set_scoped_token_property(349		collection_id: CollectionId,350		token_id: TokenId,351		scope: PropertyScope,352		property: Property,353	) -> DispatchResult {354		TokenProperties::<T>::try_mutate((collection_id, token_id), |properties| {355			properties.try_scoped_set(scope, property.key, property.value)356		})357		.map_err(<CommonError<T>>::from)?;358359		Ok(())360	}361362	/// Batch operation to set multiple properties with the same scope.363	pub fn set_scoped_token_properties(364		collection_id: CollectionId,365		token_id: TokenId,366		scope: PropertyScope,367		properties: impl Iterator<Item = Property>,368	) -> DispatchResult {369		TokenProperties::<T>::try_mutate((collection_id, token_id), |stored_properties| {370			stored_properties.try_scoped_set_from_iter(scope, properties)371		})372		.map_err(<CommonError<T>>::from)?;373374		Ok(())375	}376377	/// Add or edit auxiliary data for the property.378	///379	/// - `f`: function that adds or edits auxiliary data.380	pub fn try_mutate_token_aux_property<R, E>(381		collection_id: CollectionId,382		token_id: TokenId,383		scope: PropertyScope,384		key: PropertyKey,385		f: impl FnOnce(&mut Option<AuxPropertyValue>) -> Result<R, E>,386	) -> Result<R, E> {387		<TokenAuxProperties<T>>::try_mutate((collection_id, token_id, scope, key), f)388	}389390	/// Remove auxiliary data for the property.391	pub fn remove_token_aux_property(392		collection_id: CollectionId,393		token_id: TokenId,394		scope: PropertyScope,395		key: PropertyKey,396	) {397		<TokenAuxProperties<T>>::remove((collection_id, token_id, scope, key));398	}399400	/// Get all auxiliary data in a given scope.401	///402	/// Returns iterator over Property Key - Data pairs.403	pub fn iterate_token_aux_properties(404		collection_id: CollectionId,405		token_id: TokenId,406		scope: PropertyScope,407	) -> impl Iterator<Item = (PropertyKey, AuxPropertyValue)> {408		<TokenAuxProperties<T>>::iter_prefix((collection_id, token_id, scope))409	}410411	/// Get ID of the last minted token412	pub fn current_token_id(collection_id: CollectionId) -> TokenId {413		TokenId(<TokensMinted<T>>::get(collection_id))414	}415}416417// unchecked calls skips any permission checks418impl<T: Config> Pallet<T> {419	/// Create NFT collection420	///421	/// `init_collection` will take non-refundable deposit for collection creation.422	///423	/// - `data`: Contains settings for collection limits and permissions.424	pub fn init_collection(425		owner: T::CrossAccountId,426		payer: T::CrossAccountId,427		data: CreateCollectionData<T::CrossAccountId>,428	) -> Result<CollectionId, DispatchError> {429		<PalletCommon<T>>::init_collection(owner, payer, data)430	}431432	/// Destroy NFT collection433	///434	/// `destroy_collection` will throw error if collection contains any tokens.435	/// Only owner can destroy collection.436	pub fn destroy_collection(437		collection: NonfungibleHandle<T>,438		sender: &T::CrossAccountId,439	) -> DispatchResult {440		let id = collection.id;441442		if Self::collection_has_tokens(id) {443			return Err(<CommonError<T>>::CantDestroyNotEmptyCollection.into());444		}445446		// =========447448		PalletCommon::destroy_collection(collection.0, sender)?;449450		let _ = <TokenData<T>>::clear_prefix((id,), u32::MAX, None);451		let _ = <TokenChildren<T>>::clear_prefix((id,), u32::MAX, None);452		let _ = <Owned<T>>::clear_prefix((id,), u32::MAX, None);453		<TokensMinted<T>>::remove(id);454		<TokensBurnt<T>>::remove(id);455		let _ = <Allowance<T>>::clear_prefix((id,), u32::MAX, None);456		let _ = <AccountBalance<T>>::clear_prefix((id,), u32::MAX, None);457		let _ = <CollectionAllowance<T>>::clear_prefix((id,), u32::MAX, None);458		Ok(())459	}460461	/// Burn NFT token462	///463	/// `burn` removes `token` from the `collection`, from it's owner and from the parent token464	/// if the token is nested.465	/// Only the owner can `burn` the token. The `token` shouldn't have any nested tokens.466	/// Also removes all corresponding properties and auxiliary properties.467	///468	/// - `token`: Token that should be burned469	/// - `collection`: Collection that contains the token470	pub fn burn(471		collection: &NonfungibleHandle<T>,472		sender: &T::CrossAccountId,473		token: TokenId,474	) -> DispatchResult {475		let token_data =476			<TokenData<T>>::get((collection.id, token)).ok_or(<CommonError<T>>::TokenNotFound)?;477		ensure!(&token_data.owner == sender, <CommonError<T>>::NoPermission);478479		if collection.permissions.access() == AccessMode::AllowList {480			collection.check_allowlist(sender)?;481		}482483		if Self::token_has_children(collection.id, token) {484			return Err(<Error<T>>::CantBurnNftWithChildren.into());485		}486487		let burnt = <TokensBurnt<T>>::get(collection.id)488			.checked_add(1)489			.ok_or(ArithmeticError::Overflow)?;490491		let balance = <AccountBalance<T>>::get((collection.id, token_data.owner.clone()))492			.checked_sub(1)493			.ok_or(ArithmeticError::Overflow)?;494495		// =========496497		if balance == 0 {498			<AccountBalance<T>>::remove((collection.id, token_data.owner.clone()));499		} else {500			<AccountBalance<T>>::insert((collection.id, token_data.owner.clone()), balance);501		}502503		<PalletStructure<T>>::unnest_if_nested(&token_data.owner, collection.id, token);504505		<Owned<T>>::remove((collection.id, &token_data.owner, token));506		<TokensBurnt<T>>::insert(collection.id, burnt);507		<TokenData<T>>::remove((collection.id, token));508		<TokenProperties<T>>::remove((collection.id, token));509		let _ = <TokenAuxProperties<T>>::clear_prefix((collection.id, token), u32::MAX, None);510		let old_spender = <Allowance<T>>::take((collection.id, token));511512		if let Some(old_spender) = old_spender {513			<PalletCommon<T>>::deposit_event(CommonEvent::Approved(514				collection.id,515				token,516				token_data.owner.clone(),517				old_spender,518				0,519			));520		}521522		<PalletEvm<T>>::deposit_log(523			ERC721Events::Transfer {524				from: *token_data.owner.as_eth(),525				to: H160::default(),526				token_id: token.into(),527			}528			.to_log(collection_id_to_address(collection.id)),529		);530		<PalletCommon<T>>::deposit_event(CommonEvent::ItemDestroyed(531			collection.id,532			token,533			token_data.owner,534			1,535		));536		Ok(())537	}538539	/// Same as [`burn`] but burns all the tokens that are nested in the token first540	///541	/// - `self_budget`: Limit for searching children in depth.542	/// - `breadth_budget`: Limit of breadth of searching children.543	///544	/// [`burn`]: struct.Pallet.html#method.burn545	#[transactional]546	pub fn burn_recursively(547		collection: &NonfungibleHandle<T>,548		sender: &T::CrossAccountId,549		token: TokenId,550		self_budget: &dyn Budget,551		breadth_budget: &dyn Budget,552	) -> DispatchResultWithPostInfo {553		ensure!(self_budget.consume(), <StructureError<T>>::DepthLimit,);554555		let current_token_account =556			T::CrossTokenAddressMapping::token_to_address(collection.id, token);557558		let mut weight = Weight::zero();559560		// This method is transactional, if user in fact doesn't have permissions to remove token -561		// tokens removed here will be restored after rejected transaction562		for ((collection, token), _) in <TokenChildren<T>>::iter_prefix((collection.id, token)) {563			ensure!(breadth_budget.consume(), <StructureError<T>>::BreadthLimit,);564			let PostDispatchInfo { actual_weight, .. } =565				<PalletStructure<T>>::burn_item_recursively(566					current_token_account.clone(),567					collection,568					token,569					self_budget,570					breadth_budget,571				)?;572			if let Some(actual_weight) = actual_weight {573				weight = weight.saturating_add(actual_weight);574			}575		}576577		Self::burn(collection, sender, token)?;578		DispatchResultWithPostInfo::Ok(PostDispatchInfo {579			actual_weight: Some(weight + <SelfWeightOf<T>>::burn_item()),580			pays_fee: Pays::Yes,581		})582	}583584	/// A batch operation to add, edit or remove properties for a token.585	///586	/// - `nesting_budget`: Limit for searching parents in-depth to check ownership.587	///588	/// All affected properties should have `mutable` permission589	/// to be **deleted** or to be **set more than once**,590	/// and the sender should have permission to edit those properties.591	///592	/// This function fires an event for each property change.593	/// In case of an error, all the changes (including the events) will be reverted594	/// since the function is transactional.595	#[transactional]596	fn modify_token_properties(597		collection: &NonfungibleHandle<T>,598		sender: &T::CrossAccountId,599		token_id: TokenId,600		properties_updates: impl Iterator<Item = (PropertyKey, Option<PropertyValue>)>,601		mode: SetPropertyMode,602		nesting_budget: &dyn Budget,603	) -> DispatchResult {604		let mut is_token_owner = pallet_common::LazyValue::new(|| {605			if let SetPropertyMode::NewToken {606				mint_target_is_sender,607			} = mode608			{609				return Ok(mint_target_is_sender);610			}611612			let is_owned = <PalletStructure<T>>::check_indirectly_owned(613				sender.clone(),614				collection.id,615				token_id,616				None,617				nesting_budget,618			)?;619620			Ok(is_owned)621		});622623		let is_new_token = matches!(mode, SetPropertyMode::NewToken { .. });624625		let mut is_token_exist = pallet_common::LazyValue::new(|| {626			if is_new_token {627				debug_assert!(Self::token_exists(collection, token_id));628				true629			} else {630				Self::token_exists(collection, token_id)631			}632		});633634		let stored_properties = if is_new_token {635			TokenPropertiesT::new()636		} else {637			<TokenProperties<T>>::get((collection.id, token_id))638		};639640		<PalletCommon<T>>::modify_token_properties(641			collection,642			sender,643			token_id,644			&mut is_token_exist,645			properties_updates,646			stored_properties,647			&mut is_token_owner,648			|properties| <TokenProperties<T>>::set((collection.id, token_id), properties),649			erc::ERC721TokenEvent::TokenChanged {650				token_id: token_id.into(),651			}652			.to_log(T::ContractAddress::get()),653		)654	}655656	pub fn next_token_id(collection: &NonfungibleHandle<T>) -> Result<TokenId, DispatchError> {657		let next_token_id = <TokensMinted<T>>::get(collection.id)658			.checked_add(1)659			.ok_or(<CommonError<T>>::CollectionTokenLimitExceeded)?;660661		ensure!(662			collection.limits.token_limit() >= next_token_id,663			<CommonError<T>>::CollectionTokenLimitExceeded664		);665666		Ok(TokenId(next_token_id))667	}668669	/// Batch operation to add or edit properties for the token670	///671	/// Same as [`modify_token_properties`] but doesn't allow to remove properties672	///673	/// [`modify_token_properties`]: struct.Pallet.html#method.modify_token_properties674	pub fn set_token_properties(675		collection: &NonfungibleHandle<T>,676		sender: &T::CrossAccountId,677		token_id: TokenId,678		properties: impl Iterator<Item = Property>,679		mode: SetPropertyMode,680		nesting_budget: &dyn Budget,681	) -> DispatchResult {682		Self::modify_token_properties(683			collection,684			sender,685			token_id,686			properties.map(|p| (p.key, Some(p.value))),687			mode,688			nesting_budget,689		)690	}691692	/// Add or edit single property for the token693	///694	/// Calls [`set_token_properties`] internally695	///696	/// [`set_token_properties`]: struct.Pallet.html#method.set_token_properties697	pub fn set_token_property(698		collection: &NonfungibleHandle<T>,699		sender: &T::CrossAccountId,700		token_id: TokenId,701		property: Property,702		nesting_budget: &dyn Budget,703	) -> DispatchResult {704		Self::set_token_properties(705			collection,706			sender,707			token_id,708			[property].into_iter(),709			SetPropertyMode::ExistingToken,710			nesting_budget,711		)712	}713714	/// Batch operation to remove properties from the token715	///716	/// Same as [`modify_token_properties`] but doesn't allow to add or edit properties717	///718	/// [`modify_token_properties`]: struct.Pallet.html#method.modify_token_properties719	pub fn delete_token_properties(720		collection: &NonfungibleHandle<T>,721		sender: &T::CrossAccountId,722		token_id: TokenId,723		property_keys: impl Iterator<Item = PropertyKey>,724		nesting_budget: &dyn Budget,725	) -> DispatchResult {726		Self::modify_token_properties(727			collection,728			sender,729			token_id,730			property_keys.into_iter().map(|key| (key, None)),731			SetPropertyMode::ExistingToken,732			nesting_budget,733		)734	}735736	/// Remove single property from the token737	///738	/// Calls [`delete_token_properties`] internally739	///740	/// [`delete_token_properties`]: struct.Pallet.html#method.delete_token_properties741	pub fn delete_token_property(742		collection: &NonfungibleHandle<T>,743		sender: &T::CrossAccountId,744		token_id: TokenId,745		property_key: PropertyKey,746		nesting_budget: &dyn Budget,747	) -> DispatchResult {748		Self::delete_token_properties(749			collection,750			sender,751			token_id,752			[property_key].into_iter(),753			nesting_budget,754		)755	}756757	/// Add or edit properties for the collection758	pub fn set_collection_properties(759		collection: &NonfungibleHandle<T>,760		sender: &T::CrossAccountId,761		properties: Vec<Property>,762	) -> DispatchResult {763		<PalletCommon<T>>::set_collection_properties(collection, sender, properties.into_iter())764	}765766	/// Remove properties from the collection767	pub fn delete_collection_properties(768		collection: &CollectionHandle<T>,769		sender: &T::CrossAccountId,770		property_keys: Vec<PropertyKey>,771	) -> DispatchResult {772		<PalletCommon<T>>::delete_collection_properties(773			collection,774			sender,775			property_keys.into_iter(),776		)777	}778779	/// Set property permissions for the token.780	///781	/// Sender should be the owner or admin of token's collection.782	pub fn set_token_property_permissions(783		collection: &CollectionHandle<T>,784		sender: &T::CrossAccountId,785		property_permissions: Vec<PropertyKeyPermission>,786	) -> DispatchResult {787		<PalletCommon<T>>::set_token_property_permissions(collection, sender, property_permissions)788	}789790	/// Set property permissions for the token with scope.791	///792	/// Sender should be the owner or admin of token's collection.793	pub fn set_scoped_token_property_permissions(794		collection: &CollectionHandle<T>,795		sender: &T::CrossAccountId,796		scope: PropertyScope,797		property_permissions: Vec<PropertyKeyPermission>,798	) -> DispatchResult {799		<PalletCommon<T>>::set_scoped_token_property_permissions(800			collection,801			sender,802			scope,803			property_permissions,804		)805	}806807	pub fn token_property_permission(collection_id: CollectionId) -> PropertiesPermissionMap {808		<PalletCommon<T>>::property_permissions(collection_id)809	}810811	pub fn check_token_immediate_ownership(812		collection: &NonfungibleHandle<T>,813		token: TokenId,814		possible_owner: &T::CrossAccountId,815	) -> DispatchResult {816		let token_data =817			<TokenData<T>>::get((collection.id, token)).ok_or(<CommonError<T>>::TokenNotFound)?;818		ensure!(819			&token_data.owner == possible_owner,820			<CommonError<T>>::NoPermission821		);822		Ok(())823	}824825	/// Transfer NFT token from one account to another.826	///827	/// `from` account stops being the owner and `to` account becomes the owner of the token.828	/// If `to` is token than `to` becomes owner of the token and the token become nested.829	/// Unnests token from previous parent if it was nested before.830	/// Removes allowance for the token if there was any.831	/// Throws if transfers aren't allowed for collection or if receiver reached token ownership limit.832	///833	/// - `nesting_budget`: Limit for token nesting depth834	pub fn transfer(835		collection: &NonfungibleHandle<T>,836		from: &T::CrossAccountId,837		to: &T::CrossAccountId,838		token: TokenId,839		nesting_budget: &dyn Budget,840	) -> DispatchResultWithPostInfo {841		ensure!(842			collection.limits.transfers_enabled(),843			<CommonError<T>>::TransferNotAllowed844		);845846		let mut actual_weight = <SelfWeightOf<T>>::transfer_raw();847		let token_data =848			<TokenData<T>>::get((collection.id, token)).ok_or(<CommonError<T>>::TokenNotFound)?;849		ensure!(&token_data.owner == from, <CommonError<T>>::NoPermission);850851		if collection.permissions.access() == AccessMode::AllowList {852			collection.check_allowlist(from)?;853			collection.check_allowlist(to)?;854			actual_weight += <PalletCommonWeightOf<T>>::check_accesslist() * 2;855		}856		<PalletCommon<T>>::ensure_correct_receiver(to)?;857858		let balance_from = <AccountBalance<T>>::get((collection.id, from))859			.checked_sub(1)860			.ok_or(<CommonError<T>>::TokenValueTooLow)?;861		let balance_to = if from != to {862			let balance_to = <AccountBalance<T>>::get((collection.id, to))863				.checked_add(1)864				.ok_or(ArithmeticError::Overflow)?;865866			ensure!(867				balance_to < collection.limits.account_token_ownership_limit(),868				<CommonError<T>>::AccountTokenLimitExceeded,869			);870871			Some(balance_to)872		} else {873			None874		};875876		<PalletStructure<T>>::nest_if_sent_to_token(877			from.clone(),878			to,879			collection.id,880			token,881			nesting_budget,882		)?;883884		// =========885886		<PalletStructure<T>>::unnest_if_nested(&token_data.owner, collection.id, token);887888		<TokenData<T>>::insert((collection.id, token), ItemData { owner: to.clone() });889890		if let Some(balance_to) = balance_to {891			// from != to892			if balance_from == 0 {893				<AccountBalance<T>>::remove((collection.id, from));894			} else {895				<AccountBalance<T>>::insert((collection.id, from), balance_from);896			}897			<AccountBalance<T>>::insert((collection.id, to), balance_to);898			<Owned<T>>::remove((collection.id, from, token));899			<Owned<T>>::insert((collection.id, to, token), true);900		}901		Self::set_allowance_unchecked(collection, from, token, None, true);902903		<PalletEvm<T>>::deposit_log(904			ERC721Events::Transfer {905				from: *from.as_eth(),906				to: *to.as_eth(),907				token_id: token.into(),908			}909			.to_log(collection_id_to_address(collection.id)),910		);911		<PalletCommon<T>>::deposit_event(CommonEvent::Transfer(912			collection.id,913			token,914			from.clone(),915			to.clone(),916			1,917		));918919		Ok(PostDispatchInfo {920			actual_weight: Some(actual_weight),921			pays_fee: Pays::Yes,922		})923	}924925	/// Batch operation to mint multiple NFT tokens.926	///927	/// The sender should be the owner/admin of the collection or collection should be configured928	/// to allow public minting.929	/// Throws if amount of tokens reached it's limit for the collection or if caller reached930	/// token ownership limit.931	///932	/// - `data`: Contains list of token properties and users who will become the owners of the933	///   corresponging tokens.934	/// - `nesting_budget`: Limit for token nesting depth935	pub fn create_multiple_items(936		collection: &NonfungibleHandle<T>,937		sender: &T::CrossAccountId,938		data: Vec<CreateItemData<T>>,939		nesting_budget: &dyn Budget,940	) -> DispatchResult {941		if !collection.is_owner_or_admin(sender) {942			ensure!(943				collection.permissions.mint_mode(),944				<CommonError<T>>::PublicMintingNotAllowed945			);946			collection.check_allowlist(sender)?;947948			for item in data.iter() {949				collection.check_allowlist(&item.owner)?;950			}951		}952953		for data in data.iter() {954			<PalletCommon<T>>::ensure_correct_receiver(&data.owner)?;955		}956957		let first_token = <TokensMinted<T>>::get(collection.id);958		let tokens_minted = first_token959			.checked_add(data.len() as u32)960			.ok_or(ArithmeticError::Overflow)?;961		ensure!(962			tokens_minted <= collection.limits.token_limit(),963			<CommonError<T>>::CollectionTokenLimitExceeded964		);965966		let mut balances = BTreeMap::new();967		for data in &data {968			let balance = balances969				.entry(&data.owner)970				.or_insert_with(|| <AccountBalance<T>>::get((collection.id, &data.owner)));971			*balance = balance.checked_add(1).ok_or(ArithmeticError::Overflow)?;972973			ensure!(974				*balance <= collection.limits.account_token_ownership_limit(),975				<CommonError<T>>::AccountTokenLimitExceeded,976			);977		}978979		for (i, data) in data.iter().enumerate() {980			let token = TokenId(first_token + i as u32 + 1);981982			<PalletStructure<T>>::check_nesting(983				sender.clone(),984				&data.owner,985				collection.id,986				token,987				nesting_budget,988			)?;989		}990991		// =========992993		with_transaction(|| {994			for (i, data) in data.iter().enumerate() {995				let token = first_token + i as u32 + 1;996997				<TokenData<T>>::insert(998					(collection.id, token),999					ItemData {1000						// const_data: data.const_data.clone(),1001						owner: data.owner.clone(),1002					},1003				);10041005				<PalletStructure<T>>::nest_if_sent_to_token_unchecked(1006					&data.owner,1007					collection.id,1008					TokenId(token),1009				);10101011				if let Err(e) = Self::set_token_properties(1012					collection,1013					sender,1014					TokenId(token),1015					data.properties.clone().into_iter(),1016					SetPropertyMode::NewToken {1017						mint_target_is_sender: sender.conv_eq(&data.owner),1018					},1019					nesting_budget,1020				) {1021					return TransactionOutcome::Rollback(Err(e));1022				}1023			}1024			TransactionOutcome::Commit(Ok(()))1025		})?;10261027		<TokensMinted<T>>::insert(collection.id, tokens_minted);1028		for (account, balance) in balances {1029			<AccountBalance<T>>::insert((collection.id, account), balance);1030		}1031		for (i, data) in data.into_iter().enumerate() {1032			let token = first_token + i as u32 + 1;1033			<Owned<T>>::insert((collection.id, &data.owner, token), true);10341035			<PalletEvm<T>>::deposit_log(1036				ERC721Events::Transfer {1037					from: H160::default(),1038					to: *data.owner.as_eth(),1039					token_id: token.into(),1040				}1041				.to_log(collection_id_to_address(collection.id)),1042			);1043			<PalletCommon<T>>::deposit_event(CommonEvent::ItemCreated(1044				collection.id,1045				TokenId(token),1046				data.owner.clone(),1047				1,1048			));1049		}1050		Ok(())1051	}10521053	pub fn set_allowance_unchecked(1054		collection: &NonfungibleHandle<T>,1055		sender: &T::CrossAccountId,1056		token: TokenId,1057		spender: Option<&T::CrossAccountId>,1058		assume_implicit_eth: bool,1059	) {1060		if let Some(spender) = spender {1061			let old_spender = <Allowance<T>>::get((collection.id, token));1062			<Allowance<T>>::insert((collection.id, token), spender);1063			// In ERC721 there is only one possible approved user of token, so we set1064			// approved user to spender1065			<PalletEvm<T>>::deposit_log(1066				ERC721Events::Approval {1067					owner: *sender.as_eth(),1068					approved: *spender.as_eth(),1069					token_id: token.into(),1070				}1071				.to_log(collection_id_to_address(collection.id)),1072			);1073			// In Unique chain, any token can have any amount of approved users, so we need to1074			// set allowance of old owner to 0, and allowance of new owner to 11075			if old_spender.as_ref() != Some(spender) {1076				if let Some(old_owner) = old_spender {1077					<PalletCommon<T>>::deposit_event(CommonEvent::Approved(1078						collection.id,1079						token,1080						sender.clone(),1081						old_owner,1082						0,1083					));1084				}1085				<PalletCommon<T>>::deposit_event(CommonEvent::Approved(1086					collection.id,1087					token,1088					sender.clone(),1089					spender.clone(),1090					1,1091				));1092			}1093		} else {1094			let old_spender = <Allowance<T>>::take((collection.id, token));1095			if !assume_implicit_eth {1096				// In ERC721 there is only one possible approved user of token, so we set1097				// approved user to zero address1098				<PalletEvm<T>>::deposit_log(1099					ERC721Events::Approval {1100						owner: *sender.as_eth(),1101						approved: H160::default(),1102						token_id: token.into(),1103					}1104					.to_log(collection_id_to_address(collection.id)),1105				);1106			}1107			// In Unique chain, any token can have any amount of approved users, so we need to1108			// set allowance of old owner to 01109			if let Some(old_spender) = old_spender {1110				<PalletCommon<T>>::deposit_event(CommonEvent::Approved(1111					collection.id,1112					token,1113					sender.clone(),1114					old_spender,1115					0,1116				));1117			}1118		}1119	}11201121	pub fn get_allowance(1122		collection: &NonfungibleHandle<T>,1123		token_id: TokenId,1124	) -> Result<Option<T::CrossAccountId>, DispatchError> {1125		ensure!(1126			<TokenData<T>>::get((collection.id, token_id)).is_some(),1127			<CommonError<T>>::TokenNotFound1128		);1129		Ok(<Allowance<T>>::get((collection.id, token_id)))1130	}11311132	/// Set allowance for the spender to `transfer` or `burn` sender's token.1133	///1134	/// - `token`: Token the spender is allowed to `transfer` or `burn`.1135	pub fn set_allowance(1136		collection: &NonfungibleHandle<T>,1137		sender: &T::CrossAccountId,1138		token: TokenId,1139		spender: Option<&T::CrossAccountId>,1140	) -> DispatchResult {1141		if collection.permissions.access() == AccessMode::AllowList {1142			collection.check_allowlist(sender)?;1143			if let Some(spender) = spender {1144				collection.check_allowlist(spender)?;1145			}1146		}11471148		if let Some(spender) = spender {1149			<PalletCommon<T>>::ensure_correct_receiver(spender)?;1150		}11511152		let token_data =1153			<TokenData<T>>::get((collection.id, token)).ok_or(<CommonError<T>>::TokenNotFound)?;1154		if &token_data.owner != sender {1155			ensure!(1156				collection.ignores_owned_amount(sender),1157				<CommonError<T>>::CantApproveMoreThanOwned1158			);1159		}11601161		// =========11621163		Self::set_allowance_unchecked(collection, sender, token, spender, false);1164		Ok(())1165	}11661167	/// Set allowance for the spender to `transfer` or `burn` sender's token from eth mirror.1168	///1169	/// - `from`: Address of sender's eth mirror.1170	/// - `to`: Adress of spender.1171	/// - `token`: Token the spender is allowed to `transfer` or `burn`.1172	pub fn set_allowance_from(1173		collection: &NonfungibleHandle<T>,1174		sender: &T::CrossAccountId,1175		from: &T::CrossAccountId,1176		token: TokenId,1177		to: Option<&T::CrossAccountId>,1178	) -> DispatchResult {1179		if collection.permissions.access() == AccessMode::AllowList {1180			collection.check_allowlist(sender)?;1181			collection.check_allowlist(from)?;1182			if let Some(to) = to {1183				collection.check_allowlist(to)?;1184			}1185		}11861187		if let Some(to) = to {1188			<PalletCommon<T>>::ensure_correct_receiver(to)?;1189		}11901191		ensure!(1192			sender.conv_eq(from),1193			<CommonError<T>>::AddressIsNotEthMirror1194		);11951196		let token_data =1197			<TokenData<T>>::get((collection.id, token)).ok_or(<CommonError<T>>::TokenNotFound)?;1198		if token_data.owner != *from {1199			ensure!(1200				collection.limits.owner_can_transfer()1201					&& (collection.is_owner_or_admin(sender) || collection.is_owner_or_admin(from)),1202				<CommonError<T>>::CantApproveMoreThanOwned1203			);1204		}12051206		// =========12071208		Self::set_allowance_unchecked(collection, from, token, to, false);1209		Ok(())1210	}12111212	/// Checks allowance for the spender to use the token.1213	fn check_allowed(1214		collection: &NonfungibleHandle<T>,1215		spender: &T::CrossAccountId,1216		from: &T::CrossAccountId,1217		token: TokenId,1218		nesting_budget: &dyn Budget,1219	) -> DispatchResult {1220		if spender.conv_eq(from) {1221			return Ok(());1222		}1223		if collection.permissions.access() == AccessMode::AllowList {1224			// `from`, `to` checked in [`transfer`]1225			collection.check_allowlist(spender)?;1226		}12271228		if collection.ignores_token_restrictions(spender) {1229			return Ok(());1230		}12311232		if let Some(source) = T::CrossTokenAddressMapping::address_to_token(from) {1233			ensure!(1234				<PalletStructure<T>>::check_indirectly_owned(1235					spender.clone(),1236					source.0,1237					source.1,1238					None,1239					nesting_budget1240				)?,1241				<CommonError<T>>::ApprovedValueTooLow,1242			);1243			return Ok(());1244		}1245		if <Allowance<T>>::get((collection.id, token)).as_ref() == Some(spender) {1246			return Ok(());1247		}1248		if <CollectionAllowance<T>>::get((collection.id, from, spender)) {1249			return Ok(());1250		}12511252		Err(<CommonError<T>>::ApprovedValueTooLow.into())1253	}12541255	/// Transfer NFT token from one account to another.1256	///1257	/// Same as the [`transfer`] but spender doesn't needs to be the owner of the token.1258	/// The owner should set allowance for the spender to transfer token.1259	///1260	/// [`transfer`]: struct.Pallet.html#method.transfer1261	pub fn transfer_from(1262		collection: &NonfungibleHandle<T>,1263		spender: &T::CrossAccountId,1264		from: &T::CrossAccountId,1265		to: &T::CrossAccountId,1266		token: TokenId,1267		nesting_budget: &dyn Budget,1268	) -> DispatchResultWithPostInfo {1269		Self::check_allowed(collection, spender, from, token, nesting_budget)?;12701271		// =========12721273		// Allowance is reset in [`transfer`]1274		let mut result = Self::transfer(collection, from, to, token, nesting_budget);1275		add_weight_to_post_info(&mut result, <SelfWeightOf<T>>::check_allowed_raw());1276		result1277	}12781279	/// Burn NFT token for `from` account.1280	///1281	/// Same as the [`burn`] but spender doesn't need to be an owner of the token. The owner should1282	/// set allowance for the spender to burn token.1283	///1284	/// [`burn`]: struct.Pallet.html#method.burn1285	pub fn burn_from(1286		collection: &NonfungibleHandle<T>,1287		spender: &T::CrossAccountId,1288		from: &T::CrossAccountId,1289		token: TokenId,1290		nesting_budget: &dyn Budget,1291	) -> DispatchResult {1292		Self::check_allowed(collection, spender, from, token, nesting_budget)?;12931294		// =========12951296		Self::burn(collection, from, token)1297	}12981299	/// Check that `from` token could be nested in `under` token.1300	///1301	pub fn check_nesting(1302		handle: &NonfungibleHandle<T>,1303		sender: T::CrossAccountId,1304		from: (CollectionId, TokenId),1305		under: TokenId,1306		nesting_budget: &dyn Budget,1307	) -> DispatchResult {1308		let nesting = handle.permissions.nesting();13091310		#[cfg(not(feature = "runtime-benchmarks"))]1311		let permissive = false;1312		#[cfg(feature = "runtime-benchmarks")]1313		let permissive = nesting.permissive;13141315		if permissive {1316			ensure!(1317				<TokenData<T>>::contains_key((handle.id, under)),1318				<CommonError<T>>::TokenNotFound1319			);1320		} else if nesting.token_owner1321			&& <PalletStructure<T>>::check_indirectly_owned(1322				sender.clone(),1323				handle.id,1324				under,1325				Some(from),1326				nesting_budget,1327			)? {1328			// Pass, token existence and ouroboros checks are done in `check_indirectly_owned`1329		} else if nesting.collection_admin && handle.is_owner_or_admin(&sender) {1330			// token existence and ouroboros checks are done in `get_checked_topmost_owner`1331			let _ = <PalletStructure<T>>::get_checked_topmost_owner(1332				handle.id,1333				under,1334				Some(from),1335				nesting_budget,1336			)?1337			.ok_or(<CommonError<T>>::TokenNotFound)?;1338		} else {1339			fail!(<CommonError<T>>::UserIsNotAllowedToNest);1340		}13411342		if let Some(whitelist) = &nesting.restricted {1343			ensure!(1344				whitelist.contains(&from.0),1345				<CommonError<T>>::SourceCollectionIsNotAllowedToNest1346			);1347		}1348		Ok(())1349	}13501351	fn nest(under: (CollectionId, TokenId), to_nest: (CollectionId, TokenId)) {1352		if to_nest.0 != pallet_common::NATIVE_FUNGIBLE_COLLECTION_ID {1353			<TokenChildren<T>>::insert((under.0, under.1, to_nest), true);1354		}1355	}13561357	fn unnest(under: (CollectionId, TokenId), to_unnest: (CollectionId, TokenId)) {1358		if to_unnest.0 != pallet_common::NATIVE_FUNGIBLE_COLLECTION_ID {1359			<TokenChildren<T>>::remove((under.0, under.1, to_unnest));1360		}1361	}13621363	fn collection_has_tokens(collection_id: CollectionId) -> bool {1364		<TokenData<T>>::iter_prefix((collection_id,))1365			.next()1366			.is_some()1367	}13681369	fn token_has_children(collection_id: CollectionId, token_id: TokenId) -> bool {1370		<TokenChildren<T>>::iter_prefix((collection_id, token_id))1371			.next()1372			.is_some()1373	}13741375	pub fn token_children_ids(collection_id: CollectionId, token_id: TokenId) -> Vec<TokenChild> {1376		<TokenChildren<T>>::iter_prefix((collection_id, token_id))1377			.map(|((child_collection_id, child_id), _)| TokenChild {1378				collection: child_collection_id,1379				token: child_id,1380			})1381			.collect()1382	}13831384	/// Mint single NFT token.1385	///1386	/// Delegated to [`create_multiple_items`]1387	///1388	/// [`create_multiple_items`]: struct.Pallet.html#method.create_multiple_items1389	pub fn create_item(1390		collection: &NonfungibleHandle<T>,1391		sender: &T::CrossAccountId,1392		data: CreateItemData<T>,1393		nesting_budget: &dyn Budget,1394	) -> DispatchResult {1395		Self::create_multiple_items(collection, sender, vec![data], nesting_budget)1396	}13971398	/// Sets or unsets the approval of a given operator.1399	///1400	/// The `operator` is allowed to transfer all token pieces of the `owner` on their behalf.1401	/// - `owner`: Token owner1402	/// - `operator`: Operator1403	/// - `approve`: Should operator status be granted or revoked?1404	pub fn set_allowance_for_all(1405		collection: &NonfungibleHandle<T>,1406		owner: &T::CrossAccountId,1407		operator: &T::CrossAccountId,1408		approve: bool,1409	) -> DispatchResult {1410		<PalletCommon<T>>::set_allowance_for_all(1411			collection,1412			owner,1413			operator,1414			approve,1415			|| <CollectionAllowance<T>>::insert((collection.id, owner, operator), approve),1416			ERC721Events::ApprovalForAll {1417				owner: *owner.as_eth(),1418				operator: *operator.as_eth(),1419				approved: approve,1420			}1421			.to_log(collection_id_to_address(collection.id)),1422		)1423	}14241425	/// Tells whether the given `owner` approves the `operator`.1426	pub fn allowance_for_all(1427		collection: &NonfungibleHandle<T>,1428		owner: &T::CrossAccountId,1429		operator: &T::CrossAccountId,1430	) -> bool {1431		<CollectionAllowance<T>>::get((collection.id, owner, operator))1432	}14331434	pub fn repair_item(collection: &NonfungibleHandle<T>, token: TokenId) -> DispatchResult {1435		<TokenProperties<T>>::mutate((collection.id, token), |properties| {1436			properties.recompute_consumed_space();1437		});14381439		Ok(())1440	}1441}