git.delta.rocks / unique-network / refs/commits / 900be63a359f

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 core::ops::Deref;9495use erc::ERC721Events;96use evm_coder::ToLog;97use frame_support::{98	dispatch::{Pays, PostDispatchInfo},99	ensure, fail,100	pallet_prelude::*,101	storage::with_transaction,102	transactional, BoundedVec,103};104pub use pallet::*;105use pallet_common::{106	eth::collection_id_to_address, helpers::add_weight_to_post_info,107	weights::WeightInfo as CommonWeightInfo, CollectionHandle, Error as CommonError,108	Event as CommonEvent, Pallet as PalletCommon, SelfWeightOf as PalletCommonWeightOf,109};110use pallet_evm::{account::CrossAccountId, Pallet as PalletEvm};111use pallet_evm_coder_substrate::{SubstrateRecorder, WithRecorder};112use pallet_structure::{Error as StructureError, Pallet as PalletStructure};113use parity_scale_codec::{Decode, Encode, MaxEncodedLen};114use scale_info::TypeInfo;115use sp_core::{Get, H160};116use sp_runtime::{ArithmeticError, DispatchError, DispatchResult, TransactionOutcome};117use sp_std::{collections::btree_map::BTreeMap, vec, vec::Vec};118use up_data_structs::{119	budget::Budget, mapping::TokenAddressMapping, AccessMode, AuxPropertyValue, CollectionId,120	CreateCollectionData, CreateNftExData, CustomDataLimit, PropertiesPermissionMap, Property,121	PropertyKey, PropertyKeyPermission, PropertyScope, PropertyValue, TokenChild, TokenId,122	TokenProperties as TokenPropertiesT,123};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 frame_support::{151		pallet_prelude::*, storage::Key, traits::StorageVersion, Blake2_128Concat, Twox64Concat,152	};153	use up_data_structs::{CollectionId, TokenId};154155	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 = OptionQuery,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	impl<T: Config> Default for GenesisConfig<T> {289		fn default() -> Self {290			Self(Default::default())291		}292	}293294	#[pallet::genesis_build]295	impl<T: Config> BuildGenesisConfig for GenesisConfig<T> {296		fn build(&self) {297			StorageVersion::new(1).put::<Pallet<T>>();298		}299	}300}301302pub struct NonfungibleHandle<T: Config>(pallet_common::CollectionHandle<T>);303impl<T: Config> NonfungibleHandle<T> {304	pub fn cast(inner: pallet_common::CollectionHandle<T>) -> Self {305		Self(inner)306	}307	pub fn into_inner(self) -> pallet_common::CollectionHandle<T> {308		self.0309	}310	pub fn common_mut(&mut self) -> &mut pallet_common::CollectionHandle<T> {311		&mut self.0312	}313}314315impl<T: Config> WithRecorder<T> for NonfungibleHandle<T> {316	fn recorder(&self) -> &SubstrateRecorder<T> {317		self.0.recorder()318	}319	fn into_recorder(self) -> SubstrateRecorder<T> {320		self.0.into_recorder()321	}322}323impl<T: Config> Deref for NonfungibleHandle<T> {324	type Target = pallet_common::CollectionHandle<T>;325326	fn deref(&self) -> &Self::Target {327		&self.0328	}329}330331impl<T: Config> Pallet<T> {332	/// Get number of NFT tokens in collection.333	pub fn total_supply(collection: &NonfungibleHandle<T>) -> u32 {334		<TokensMinted<T>>::get(collection.id) - <TokensBurnt<T>>::get(collection.id)335	}336337	/// Check that NFT token exists.338	///339	/// - `token`: Token ID.340	pub fn token_exists(collection: &NonfungibleHandle<T>, token: TokenId) -> bool {341		<TokenData<T>>::contains_key((collection.id, token))342	}343344	/// Add or edit auxiliary data for the property.345	///346	/// - `f`: function that adds or edits auxiliary data.347	pub fn try_mutate_token_aux_property<R, E>(348		collection_id: CollectionId,349		token_id: TokenId,350		scope: PropertyScope,351		key: PropertyKey,352		f: impl FnOnce(&mut Option<AuxPropertyValue>) -> Result<R, E>,353	) -> Result<R, E> {354		<TokenAuxProperties<T>>::try_mutate((collection_id, token_id, scope, key), f)355	}356357	/// Remove auxiliary data for the property.358	pub fn remove_token_aux_property(359		collection_id: CollectionId,360		token_id: TokenId,361		scope: PropertyScope,362		key: PropertyKey,363	) {364		<TokenAuxProperties<T>>::remove((collection_id, token_id, scope, key));365	}366367	/// Get all auxiliary data in a given scope.368	///369	/// Returns iterator over Property Key - Data pairs.370	pub fn iterate_token_aux_properties(371		collection_id: CollectionId,372		token_id: TokenId,373		scope: PropertyScope,374	) -> impl Iterator<Item = (PropertyKey, AuxPropertyValue)> {375		<TokenAuxProperties<T>>::iter_prefix((collection_id, token_id, scope))376	}377378	/// Get ID of the last minted token379	pub fn current_token_id(collection_id: CollectionId) -> TokenId {380		TokenId(<TokensMinted<T>>::get(collection_id))381	}382}383384// unchecked calls skips any permission checks385impl<T: Config> Pallet<T> {386	/// Create NFT collection387	///388	/// `init_collection` will take non-refundable deposit for collection creation.389	///390	/// - `data`: Contains settings for collection limits and permissions.391	pub fn init_collection(392		owner: T::CrossAccountId,393		payer: T::CrossAccountId,394		data: CreateCollectionData<T::CrossAccountId>,395	) -> Result<CollectionId, DispatchError> {396		<PalletCommon<T>>::init_collection(owner, payer, data)397	}398399	/// Destroy NFT collection400	///401	/// `destroy_collection` will throw error if collection contains any tokens.402	/// Only owner can destroy collection.403	pub fn destroy_collection(404		collection: NonfungibleHandle<T>,405		sender: &T::CrossAccountId,406	) -> DispatchResult {407		let id = collection.id;408409		if Self::collection_has_tokens(id) {410			return Err(<CommonError<T>>::CantDestroyNotEmptyCollection.into());411		}412413		// =========414415		PalletCommon::destroy_collection(collection.0, sender)?;416417		let _ = <TokenData<T>>::clear_prefix((id,), u32::MAX, None);418		let _ = <TokenChildren<T>>::clear_prefix((id,), u32::MAX, None);419		let _ = <Owned<T>>::clear_prefix((id,), u32::MAX, None);420		<TokensMinted<T>>::remove(id);421		<TokensBurnt<T>>::remove(id);422		let _ = <Allowance<T>>::clear_prefix((id,), u32::MAX, None);423		let _ = <AccountBalance<T>>::clear_prefix((id,), u32::MAX, None);424		let _ = <CollectionAllowance<T>>::clear_prefix((id,), u32::MAX, None);425		Ok(())426	}427428	/// Burn NFT token429	///430	/// `burn` removes `token` from the `collection`, from it's owner and from the parent token431	/// if the token is nested.432	/// Only the owner can `burn` the token. The `token` shouldn't have any nested tokens.433	/// Also removes all corresponding properties and auxiliary properties.434	///435	/// - `token`: Token that should be burned436	/// - `collection`: Collection that contains the token437	pub fn burn(438		collection: &NonfungibleHandle<T>,439		sender: &T::CrossAccountId,440		token: TokenId,441	) -> DispatchResult {442		let token_data =443			<TokenData<T>>::get((collection.id, token)).ok_or(<CommonError<T>>::TokenNotFound)?;444		ensure!(&token_data.owner == sender, <CommonError<T>>::NoPermission);445446		if collection.permissions.access() == AccessMode::AllowList {447			collection.check_allowlist(sender)?;448		}449450		if Self::token_has_children(collection.id, token) {451			return Err(<Error<T>>::CantBurnNftWithChildren.into());452		}453454		let burnt = <TokensBurnt<T>>::get(collection.id)455			.checked_add(1)456			.ok_or(ArithmeticError::Overflow)?;457458		let balance = <AccountBalance<T>>::get((collection.id, token_data.owner.clone()))459			.checked_sub(1)460			.ok_or(ArithmeticError::Overflow)?;461462		// =========463464		if balance == 0 {465			<AccountBalance<T>>::remove((collection.id, token_data.owner.clone()));466		} else {467			<AccountBalance<T>>::insert((collection.id, token_data.owner.clone()), balance);468		}469470		<PalletStructure<T>>::unnest_if_nested(&token_data.owner, collection.id, token);471472		<Owned<T>>::remove((collection.id, &token_data.owner, token));473		<TokensBurnt<T>>::insert(collection.id, burnt);474		<TokenData<T>>::remove((collection.id, token));475		<TokenProperties<T>>::remove((collection.id, token));476		let _ = <TokenAuxProperties<T>>::clear_prefix((collection.id, token), u32::MAX, None);477		let old_spender = <Allowance<T>>::take((collection.id, token));478479		if let Some(old_spender) = old_spender {480			<PalletCommon<T>>::deposit_event(CommonEvent::Approved(481				collection.id,482				token,483				token_data.owner.clone(),484				old_spender,485				0,486			));487		}488489		<PalletEvm<T>>::deposit_log(490			ERC721Events::Transfer {491				from: *token_data.owner.as_eth(),492				to: H160::default(),493				token_id: token.into(),494			}495			.to_log(collection_id_to_address(collection.id)),496		);497		<PalletCommon<T>>::deposit_event(CommonEvent::ItemDestroyed(498			collection.id,499			token,500			token_data.owner,501			1,502		));503		Ok(())504	}505506	/// Same as [`burn`] but burns all the tokens that are nested in the token first507	///508	/// - `self_budget`: Limit for searching children in depth.509	/// - `breadth_budget`: Limit of breadth of searching children.510	///511	/// [`burn`]: struct.Pallet.html#method.burn512	#[transactional]513	pub fn burn_recursively(514		collection: &NonfungibleHandle<T>,515		sender: &T::CrossAccountId,516		token: TokenId,517		self_budget: &dyn Budget,518		breadth_budget: &dyn Budget,519	) -> DispatchResultWithPostInfo {520		ensure!(self_budget.consume(), <StructureError<T>>::DepthLimit,);521522		let current_token_account =523			T::CrossTokenAddressMapping::token_to_address(collection.id, token);524525		let mut weight = Weight::zero();526527		// This method is transactional, if user in fact doesn't have permissions to remove token -528		// tokens removed here will be restored after rejected transaction529		for ((collection, token), _) in <TokenChildren<T>>::iter_prefix((collection.id, token)) {530			ensure!(breadth_budget.consume(), <StructureError<T>>::BreadthLimit,);531			let PostDispatchInfo { actual_weight, .. } =532				<PalletStructure<T>>::burn_item_recursively(533					current_token_account.clone(),534					collection,535					token,536					self_budget,537					breadth_budget,538				)?;539			if let Some(actual_weight) = actual_weight {540				weight = weight.saturating_add(actual_weight);541			}542		}543544		Self::burn(collection, sender, token)?;545		DispatchResultWithPostInfo::Ok(PostDispatchInfo {546			actual_weight: Some(weight + <SelfWeightOf<T>>::burn_item()),547			pays_fee: Pays::Yes,548		})549	}550551	/// A batch operation to add, edit or remove properties for a token.552	///553	/// - `nesting_budget`: Limit for searching parents in-depth to check ownership.554	///555	/// All affected properties should have `mutable` permission556	/// to be **deleted** or to be **set more than once**,557	/// and the sender should have permission to edit those properties.558	///559	/// This function fires an event for each property change.560	/// In case of an error, all the changes (including the events) will be reverted561	/// since the function is transactional.562	#[transactional]563	fn modify_token_properties(564		collection: &NonfungibleHandle<T>,565		sender: &T::CrossAccountId,566		token_id: TokenId,567		properties_updates: impl Iterator<Item = (PropertyKey, Option<PropertyValue>)>,568		nesting_budget: &dyn Budget,569	) -> DispatchResult {570		let mut property_writer =571			pallet_common::property_writer_for_existing_token(collection, sender);572573		property_writer.write_token_properties(574			sender,575			token_id,576			properties_updates,577			nesting_budget,578			erc::ERC721TokenEvent::TokenChanged {579				token_id: token_id.into(),580			}581			.to_log(T::ContractAddress::get()),582		)583	}584585	pub fn next_token_id(collection: &NonfungibleHandle<T>) -> Result<TokenId, DispatchError> {586		let next_token_id = <TokensMinted<T>>::get(collection.id)587			.checked_add(1)588			.ok_or(<CommonError<T>>::CollectionTokenLimitExceeded)?;589590		ensure!(591			collection.limits.token_limit() >= next_token_id,592			<CommonError<T>>::CollectionTokenLimitExceeded593		);594595		Ok(TokenId(next_token_id))596	}597598	/// Batch operation to add or edit properties for the token599	///600	/// Same as [`modify_token_properties`] but doesn't allow to remove properties601	///602	/// [`modify_token_properties`]: struct.Pallet.html#method.modify_token_properties603	pub fn set_token_properties(604		collection: &NonfungibleHandle<T>,605		sender: &T::CrossAccountId,606		token_id: TokenId,607		properties: impl Iterator<Item = Property>,608		nesting_budget: &dyn Budget,609	) -> DispatchResult {610		Self::modify_token_properties(611			collection,612			sender,613			token_id,614			properties.map(|p| (p.key, Some(p.value))),615			nesting_budget,616		)617	}618619	/// Add or edit single property for the token620	///621	/// Calls [`set_token_properties`] internally622	///623	/// [`set_token_properties`]: struct.Pallet.html#method.set_token_properties624	pub fn set_token_property(625		collection: &NonfungibleHandle<T>,626		sender: &T::CrossAccountId,627		token_id: TokenId,628		property: Property,629		nesting_budget: &dyn Budget,630	) -> DispatchResult {631		Self::set_token_properties(632			collection,633			sender,634			token_id,635			[property].into_iter(),636			nesting_budget,637		)638	}639640	/// Batch operation to remove properties from the token641	///642	/// Same as [`modify_token_properties`] but doesn't allow to add or edit properties643	///644	/// [`modify_token_properties`]: struct.Pallet.html#method.modify_token_properties645	pub fn delete_token_properties(646		collection: &NonfungibleHandle<T>,647		sender: &T::CrossAccountId,648		token_id: TokenId,649		property_keys: impl Iterator<Item = PropertyKey>,650		nesting_budget: &dyn Budget,651	) -> DispatchResult {652		Self::modify_token_properties(653			collection,654			sender,655			token_id,656			property_keys.into_iter().map(|key| (key, None)),657			nesting_budget,658		)659	}660661	/// Remove single property from the token662	///663	/// Calls [`delete_token_properties`] internally664	///665	/// [`delete_token_properties`]: struct.Pallet.html#method.delete_token_properties666	pub fn delete_token_property(667		collection: &NonfungibleHandle<T>,668		sender: &T::CrossAccountId,669		token_id: TokenId,670		property_key: PropertyKey,671		nesting_budget: &dyn Budget,672	) -> DispatchResult {673		Self::delete_token_properties(674			collection,675			sender,676			token_id,677			[property_key].into_iter(),678			nesting_budget,679		)680	}681682	/// Add or edit properties for the collection683	pub fn set_collection_properties(684		collection: &NonfungibleHandle<T>,685		sender: &T::CrossAccountId,686		properties: Vec<Property>,687	) -> DispatchResult {688		<PalletCommon<T>>::set_collection_properties(collection, sender, properties.into_iter())689	}690691	/// Remove properties from the collection692	pub fn delete_collection_properties(693		collection: &CollectionHandle<T>,694		sender: &T::CrossAccountId,695		property_keys: Vec<PropertyKey>,696	) -> DispatchResult {697		<PalletCommon<T>>::delete_collection_properties(698			collection,699			sender,700			property_keys.into_iter(),701		)702	}703704	/// Set property permissions for the token.705	///706	/// Sender should be the owner or admin of token's collection.707	pub fn set_token_property_permissions(708		collection: &CollectionHandle<T>,709		sender: &T::CrossAccountId,710		property_permissions: Vec<PropertyKeyPermission>,711	) -> DispatchResult {712		<PalletCommon<T>>::set_token_property_permissions(collection, sender, property_permissions)713	}714715	/// Set property permissions for the token with scope.716	///717	/// Sender should be the owner or admin of token's collection.718	pub fn set_scoped_token_property_permissions(719		collection: &CollectionHandle<T>,720		sender: &T::CrossAccountId,721		scope: PropertyScope,722		property_permissions: Vec<PropertyKeyPermission>,723	) -> DispatchResult {724		<PalletCommon<T>>::set_scoped_token_property_permissions(725			collection,726			sender,727			scope,728			property_permissions,729		)730	}731732	pub fn token_property_permission(collection_id: CollectionId) -> PropertiesPermissionMap {733		<PalletCommon<T>>::property_permissions(collection_id)734	}735736	pub fn check_token_immediate_ownership(737		collection: &NonfungibleHandle<T>,738		token: TokenId,739		possible_owner: &T::CrossAccountId,740	) -> DispatchResult {741		let token_data =742			<TokenData<T>>::get((collection.id, token)).ok_or(<CommonError<T>>::TokenNotFound)?;743		ensure!(744			&token_data.owner == possible_owner,745			<CommonError<T>>::NoPermission746		);747		Ok(())748	}749750	/// Transfer NFT token from one account to another.751	///752	/// `from` account stops being the owner and `to` account becomes the owner of the token.753	/// If `to` is token than `to` becomes owner of the token and the token become nested.754	/// Unnests token from previous parent if it was nested before.755	/// Removes allowance for the token if there was any.756	/// Throws if transfers aren't allowed for collection or if receiver reached token ownership limit.757	///758	/// - `nesting_budget`: Limit for token nesting depth759	pub fn transfer(760		collection: &NonfungibleHandle<T>,761		from: &T::CrossAccountId,762		to: &T::CrossAccountId,763		token: TokenId,764		nesting_budget: &dyn Budget,765	) -> DispatchResultWithPostInfo {766		ensure!(767			collection.limits.transfers_enabled(),768			<CommonError<T>>::TransferNotAllowed769		);770771		let mut actual_weight = <SelfWeightOf<T>>::transfer_raw();772		let token_data =773			<TokenData<T>>::get((collection.id, token)).ok_or(<CommonError<T>>::TokenNotFound)?;774		ensure!(&token_data.owner == from, <CommonError<T>>::NoPermission);775776		if collection.permissions.access() == AccessMode::AllowList {777			collection.check_allowlist(from)?;778			collection.check_allowlist(to)?;779			actual_weight += <PalletCommonWeightOf<T>>::check_accesslist() * 2;780		}781		<PalletCommon<T>>::ensure_correct_receiver(to)?;782783		let balance_from = <AccountBalance<T>>::get((collection.id, from))784			.checked_sub(1)785			.ok_or(<CommonError<T>>::TokenValueTooLow)?;786		let balance_to = if from != to {787			let balance_to = <AccountBalance<T>>::get((collection.id, to))788				.checked_add(1)789				.ok_or(ArithmeticError::Overflow)?;790791			ensure!(792				balance_to < collection.limits.account_token_ownership_limit(),793				<CommonError<T>>::AccountTokenLimitExceeded,794			);795796			Some(balance_to)797		} else {798			None799		};800801		<PalletStructure<T>>::nest_if_sent_to_token(802			from.clone(),803			to,804			collection.id,805			token,806			nesting_budget,807		)?;808809		// =========810811		<PalletStructure<T>>::unnest_if_nested(&token_data.owner, collection.id, token);812813		<TokenData<T>>::insert((collection.id, token), ItemData { owner: to.clone() });814815		if let Some(balance_to) = balance_to {816			// from != to817			if balance_from == 0 {818				<AccountBalance<T>>::remove((collection.id, from));819			} else {820				<AccountBalance<T>>::insert((collection.id, from), balance_from);821			}822			<AccountBalance<T>>::insert((collection.id, to), balance_to);823			<Owned<T>>::remove((collection.id, from, token));824			<Owned<T>>::insert((collection.id, to, token), true);825		}826		Self::set_allowance_unchecked(collection, from, token, None, true);827828		<PalletEvm<T>>::deposit_log(829			ERC721Events::Transfer {830				from: *from.as_eth(),831				to: *to.as_eth(),832				token_id: token.into(),833			}834			.to_log(collection_id_to_address(collection.id)),835		);836		<PalletCommon<T>>::deposit_event(CommonEvent::Transfer(837			collection.id,838			token,839			from.clone(),840			to.clone(),841			1,842		));843844		Ok(PostDispatchInfo {845			actual_weight: Some(actual_weight),846			pays_fee: Pays::Yes,847		})848	}849850	/// Batch operation to mint multiple NFT tokens.851	///852	/// The sender should be the owner/admin of the collection or collection should be configured853	/// to allow public minting.854	/// Throws if amount of tokens reached it's limit for the collection or if caller reached855	/// token ownership limit.856	///857	/// - `data`: Contains list of token properties and users who will become the owners of the858	///   corresponging tokens.859	/// - `nesting_budget`: Limit for token nesting depth860	pub fn create_multiple_items(861		collection: &NonfungibleHandle<T>,862		sender: &T::CrossAccountId,863		data: Vec<CreateItemData<T>>,864		nesting_budget: &dyn Budget,865	) -> DispatchResult {866		if !collection.is_owner_or_admin(sender) {867			ensure!(868				collection.permissions.mint_mode(),869				<CommonError<T>>::PublicMintingNotAllowed870			);871			collection.check_allowlist(sender)?;872873			for item in data.iter() {874				collection.check_allowlist(&item.owner)?;875			}876		}877878		for data in data.iter() {879			<PalletCommon<T>>::ensure_correct_receiver(&data.owner)?;880		}881882		let first_token = <TokensMinted<T>>::get(collection.id);883		let tokens_minted = first_token884			.checked_add(data.len() as u32)885			.ok_or(ArithmeticError::Overflow)?;886		ensure!(887			tokens_minted <= collection.limits.token_limit(),888			<CommonError<T>>::CollectionTokenLimitExceeded889		);890891		let mut balances = BTreeMap::new();892		for data in &data {893			let balance = balances894				.entry(&data.owner)895				.or_insert_with(|| <AccountBalance<T>>::get((collection.id, &data.owner)));896			*balance = balance.checked_add(1).ok_or(ArithmeticError::Overflow)?;897898			ensure!(899				*balance <= collection.limits.account_token_ownership_limit(),900				<CommonError<T>>::AccountTokenLimitExceeded,901			);902		}903904		for (i, data) in data.iter().enumerate() {905			let token = TokenId(first_token + i as u32 + 1);906907			<PalletStructure<T>>::check_nesting(908				sender.clone(),909				&data.owner,910				collection.id,911				token,912				nesting_budget,913			)?;914		}915916		// =========917918		let mut property_writer = pallet_common::property_writer_for_new_token(collection, sender);919920		with_transaction(|| {921			for (i, data) in data.iter().enumerate() {922				let token = first_token + i as u32 + 1;923924				<TokenData<T>>::insert(925					(collection.id, token),926					ItemData {927						// const_data: data.const_data.clone(),928						owner: data.owner.clone(),929					},930				);931932				let token = TokenId(token);933934				<PalletStructure<T>>::nest_if_sent_to_token_unchecked(935					&data.owner,936					collection.id,937					token,938				);939940				if let Err(e) = property_writer.write_token_properties(941					sender.conv_eq(&data.owner),942					token,943					data.properties.clone().into_iter(),944					erc::ERC721TokenEvent::TokenChanged {945						token_id: token.into(),946					}947					.to_log(T::ContractAddress::get()),948				) {949					return TransactionOutcome::Rollback(Err(e));950				}951			}952			TransactionOutcome::Commit(Ok(()))953		})?;954955		<TokensMinted<T>>::insert(collection.id, tokens_minted);956		for (account, balance) in balances {957			<AccountBalance<T>>::insert((collection.id, account), balance);958		}959		for (i, data) in data.into_iter().enumerate() {960			let token = first_token + i as u32 + 1;961			<Owned<T>>::insert((collection.id, &data.owner, token), true);962963			<PalletEvm<T>>::deposit_log(964				ERC721Events::Transfer {965					from: H160::default(),966					to: *data.owner.as_eth(),967					token_id: token.into(),968				}969				.to_log(collection_id_to_address(collection.id)),970			);971			<PalletCommon<T>>::deposit_event(CommonEvent::ItemCreated(972				collection.id,973				TokenId(token),974				data.owner.clone(),975				1,976			));977		}978		Ok(())979	}980981	pub fn set_allowance_unchecked(982		collection: &NonfungibleHandle<T>,983		sender: &T::CrossAccountId,984		token: TokenId,985		spender: Option<&T::CrossAccountId>,986		assume_implicit_eth: bool,987	) {988		if let Some(spender) = spender {989			let old_spender = <Allowance<T>>::get((collection.id, token));990			<Allowance<T>>::insert((collection.id, token), spender);991			// In ERC721 there is only one possible approved user of token, so we set992			// approved user to spender993			<PalletEvm<T>>::deposit_log(994				ERC721Events::Approval {995					owner: *sender.as_eth(),996					approved: *spender.as_eth(),997					token_id: token.into(),998				}999				.to_log(collection_id_to_address(collection.id)),1000			);1001			// In Unique chain, any token can have any amount of approved users, so we need to1002			// set allowance of old owner to 0, and allowance of new owner to 11003			if old_spender.as_ref() != Some(spender) {1004				if let Some(old_owner) = old_spender {1005					<PalletCommon<T>>::deposit_event(CommonEvent::Approved(1006						collection.id,1007						token,1008						sender.clone(),1009						old_owner,1010						0,1011					));1012				}1013				<PalletCommon<T>>::deposit_event(CommonEvent::Approved(1014					collection.id,1015					token,1016					sender.clone(),1017					spender.clone(),1018					1,1019				));1020			}1021		} else {1022			let old_spender = <Allowance<T>>::take((collection.id, token));1023			if !assume_implicit_eth {1024				// In ERC721 there is only one possible approved user of token, so we set1025				// approved user to zero address1026				<PalletEvm<T>>::deposit_log(1027					ERC721Events::Approval {1028						owner: *sender.as_eth(),1029						approved: H160::default(),1030						token_id: token.into(),1031					}1032					.to_log(collection_id_to_address(collection.id)),1033				);1034			}1035			// In Unique chain, any token can have any amount of approved users, so we need to1036			// set allowance of old owner to 01037			if let Some(old_spender) = old_spender {1038				<PalletCommon<T>>::deposit_event(CommonEvent::Approved(1039					collection.id,1040					token,1041					sender.clone(),1042					old_spender,1043					0,1044				));1045			}1046		}1047	}10481049	pub fn get_allowance(1050		collection: &NonfungibleHandle<T>,1051		token_id: TokenId,1052	) -> Result<Option<T::CrossAccountId>, DispatchError> {1053		ensure!(1054			<TokenData<T>>::get((collection.id, token_id)).is_some(),1055			<CommonError<T>>::TokenNotFound1056		);1057		Ok(<Allowance<T>>::get((collection.id, token_id)))1058	}10591060	/// Set allowance for the spender to `transfer` or `burn` sender's token.1061	///1062	/// - `token`: Token the spender is allowed to `transfer` or `burn`.1063	pub fn set_allowance(1064		collection: &NonfungibleHandle<T>,1065		sender: &T::CrossAccountId,1066		token: TokenId,1067		spender: Option<&T::CrossAccountId>,1068	) -> DispatchResult {1069		if collection.permissions.access() == AccessMode::AllowList {1070			collection.check_allowlist(sender)?;1071			if let Some(spender) = spender {1072				collection.check_allowlist(spender)?;1073			}1074		}10751076		if let Some(spender) = spender {1077			<PalletCommon<T>>::ensure_correct_receiver(spender)?;1078		}10791080		let token_data =1081			<TokenData<T>>::get((collection.id, token)).ok_or(<CommonError<T>>::TokenNotFound)?;1082		if &token_data.owner != sender {1083			ensure!(1084				collection.ignores_owned_amount(sender),1085				<CommonError<T>>::CantApproveMoreThanOwned1086			);1087		}10881089		// =========10901091		Self::set_allowance_unchecked(collection, sender, token, spender, false);1092		Ok(())1093	}10941095	/// Set allowance for the spender to `transfer` or `burn` sender's token from eth mirror.1096	///1097	/// - `from`: Address of sender's eth mirror.1098	/// - `to`: Adress of spender.1099	/// - `token`: Token the spender is allowed to `transfer` or `burn`.1100	pub fn set_allowance_from(1101		collection: &NonfungibleHandle<T>,1102		sender: &T::CrossAccountId,1103		from: &T::CrossAccountId,1104		token: TokenId,1105		to: Option<&T::CrossAccountId>,1106	) -> DispatchResult {1107		if collection.permissions.access() == AccessMode::AllowList {1108			collection.check_allowlist(sender)?;1109			collection.check_allowlist(from)?;1110			if let Some(to) = to {1111				collection.check_allowlist(to)?;1112			}1113		}11141115		if let Some(to) = to {1116			<PalletCommon<T>>::ensure_correct_receiver(to)?;1117		}11181119		ensure!(1120			sender.conv_eq(from),1121			<CommonError<T>>::AddressIsNotEthMirror1122		);11231124		let token_data =1125			<TokenData<T>>::get((collection.id, token)).ok_or(<CommonError<T>>::TokenNotFound)?;1126		if token_data.owner != *from {1127			ensure!(1128				collection.limits.owner_can_transfer()1129					&& (collection.is_owner_or_admin(sender) || collection.is_owner_or_admin(from)),1130				<CommonError<T>>::CantApproveMoreThanOwned1131			);1132		}11331134		// =========11351136		Self::set_allowance_unchecked(collection, from, token, to, false);1137		Ok(())1138	}11391140	/// Checks allowance for the spender to use the token.1141	fn check_allowed(1142		collection: &NonfungibleHandle<T>,1143		spender: &T::CrossAccountId,1144		from: &T::CrossAccountId,1145		token: TokenId,1146		nesting_budget: &dyn Budget,1147	) -> DispatchResult {1148		if spender.conv_eq(from) {1149			return Ok(());1150		}1151		if collection.permissions.access() == AccessMode::AllowList {1152			// `from`, `to` checked in [`transfer`]1153			collection.check_allowlist(spender)?;1154		}11551156		if collection.ignores_token_restrictions(spender) {1157			return Ok(());1158		}11591160		if let Some(source) = T::CrossTokenAddressMapping::address_to_token(from) {1161			ensure!(1162				<PalletStructure<T>>::check_indirectly_owned(1163					spender.clone(),1164					source.0,1165					source.1,1166					None,1167					nesting_budget1168				)?,1169				<CommonError<T>>::ApprovedValueTooLow,1170			);1171			return Ok(());1172		}1173		if <Allowance<T>>::get((collection.id, token)).as_ref() == Some(spender) {1174			return Ok(());1175		}1176		if <CollectionAllowance<T>>::get((collection.id, from, spender)) {1177			return Ok(());1178		}11791180		Err(<CommonError<T>>::ApprovedValueTooLow.into())1181	}11821183	/// Transfer NFT token from one account to another.1184	///1185	/// Same as the [`transfer`] but spender doesn't needs to be the owner of the token.1186	/// The owner should set allowance for the spender to transfer token.1187	///1188	/// [`transfer`]: struct.Pallet.html#method.transfer1189	pub fn transfer_from(1190		collection: &NonfungibleHandle<T>,1191		spender: &T::CrossAccountId,1192		from: &T::CrossAccountId,1193		to: &T::CrossAccountId,1194		token: TokenId,1195		nesting_budget: &dyn Budget,1196	) -> DispatchResultWithPostInfo {1197		Self::check_allowed(collection, spender, from, token, nesting_budget)?;11981199		// =========12001201		// Allowance is reset in [`transfer`]1202		let mut result = Self::transfer(collection, from, to, token, nesting_budget);1203		add_weight_to_post_info(&mut result, <SelfWeightOf<T>>::check_allowed_raw());1204		result1205	}12061207	/// Burn NFT token for `from` account.1208	///1209	/// Same as the [`burn`] but spender doesn't need to be an owner of the token. The owner should1210	/// set allowance for the spender to burn token.1211	///1212	/// [`burn`]: struct.Pallet.html#method.burn1213	pub fn burn_from(1214		collection: &NonfungibleHandle<T>,1215		spender: &T::CrossAccountId,1216		from: &T::CrossAccountId,1217		token: TokenId,1218		nesting_budget: &dyn Budget,1219	) -> DispatchResult {1220		Self::check_allowed(collection, spender, from, token, nesting_budget)?;12211222		// =========12231224		Self::burn(collection, from, token)1225	}12261227	/// Check that `from` token could be nested in `under` token.1228	///1229	pub fn check_nesting(1230		handle: &NonfungibleHandle<T>,1231		sender: T::CrossAccountId,1232		from: (CollectionId, TokenId),1233		under: TokenId,1234		nesting_budget: &dyn Budget,1235	) -> DispatchResult {1236		let nesting = handle.permissions.nesting();12371238		#[cfg(not(feature = "runtime-benchmarks"))]1239		let permissive = false;1240		#[cfg(feature = "runtime-benchmarks")]1241		let permissive = nesting.permissive;12421243		if permissive {1244			ensure!(1245				<TokenData<T>>::contains_key((handle.id, under)),1246				<CommonError<T>>::TokenNotFound1247			);1248		} else if nesting.token_owner1249			&& <PalletStructure<T>>::check_indirectly_owned(1250				sender.clone(),1251				handle.id,1252				under,1253				Some(from),1254				nesting_budget,1255			)? {1256			// Pass, token existence and ouroboros checks are done in `check_indirectly_owned`1257		} else if nesting.collection_admin && handle.is_owner_or_admin(&sender) {1258			// token existence and ouroboros checks are done in `get_checked_topmost_owner`1259			let _ = <PalletStructure<T>>::get_checked_topmost_owner(1260				handle.id,1261				under,1262				Some(from),1263				nesting_budget,1264			)?1265			.ok_or(<CommonError<T>>::TokenNotFound)?;1266		} else {1267			fail!(<CommonError<T>>::UserIsNotAllowedToNest);1268		}12691270		if let Some(whitelist) = &nesting.restricted {1271			ensure!(1272				whitelist.contains(&from.0),1273				<CommonError<T>>::SourceCollectionIsNotAllowedToNest1274			);1275		}1276		Ok(())1277	}12781279	fn nest(under: (CollectionId, TokenId), to_nest: (CollectionId, TokenId)) {1280		if to_nest.0 != pallet_common::NATIVE_FUNGIBLE_COLLECTION_ID {1281			<TokenChildren<T>>::insert((under.0, under.1, to_nest), true);1282		}1283	}12841285	fn unnest(under: (CollectionId, TokenId), to_unnest: (CollectionId, TokenId)) {1286		if to_unnest.0 != pallet_common::NATIVE_FUNGIBLE_COLLECTION_ID {1287			<TokenChildren<T>>::remove((under.0, under.1, to_unnest));1288		}1289	}12901291	fn collection_has_tokens(collection_id: CollectionId) -> bool {1292		<TokenData<T>>::iter_prefix((collection_id,))1293			.next()1294			.is_some()1295	}12961297	fn token_has_children(collection_id: CollectionId, token_id: TokenId) -> bool {1298		<TokenChildren<T>>::iter_prefix((collection_id, token_id))1299			.next()1300			.is_some()1301	}13021303	pub fn token_children_ids(collection_id: CollectionId, token_id: TokenId) -> Vec<TokenChild> {1304		<TokenChildren<T>>::iter_prefix((collection_id, token_id))1305			.map(|((child_collection_id, child_id), _)| TokenChild {1306				collection: child_collection_id,1307				token: child_id,1308			})1309			.collect()1310	}13111312	/// Mint single NFT token.1313	///1314	/// Delegated to [`create_multiple_items`]1315	///1316	/// [`create_multiple_items`]: struct.Pallet.html#method.create_multiple_items1317	pub fn create_item(1318		collection: &NonfungibleHandle<T>,1319		sender: &T::CrossAccountId,1320		data: CreateItemData<T>,1321		nesting_budget: &dyn Budget,1322	) -> DispatchResult {1323		Self::create_multiple_items(collection, sender, vec![data], nesting_budget)1324	}13251326	/// Sets or unsets the approval of a given operator.1327	///1328	/// The `operator` is allowed to transfer all token pieces of the `owner` on their behalf.1329	/// - `owner`: Token owner1330	/// - `operator`: Operator1331	/// - `approve`: Should operator status be granted or revoked?1332	pub fn set_allowance_for_all(1333		collection: &NonfungibleHandle<T>,1334		owner: &T::CrossAccountId,1335		operator: &T::CrossAccountId,1336		approve: bool,1337	) -> DispatchResult {1338		<PalletCommon<T>>::set_allowance_for_all(1339			collection,1340			owner,1341			operator,1342			approve,1343			|| <CollectionAllowance<T>>::insert((collection.id, owner, operator), approve),1344			ERC721Events::ApprovalForAll {1345				owner: *owner.as_eth(),1346				operator: *operator.as_eth(),1347				approved: approve,1348			}1349			.to_log(collection_id_to_address(collection.id)),1350		)1351	}13521353	/// Tells whether the given `owner` approves the `operator`.1354	pub fn allowance_for_all(1355		collection: &NonfungibleHandle<T>,1356		owner: &T::CrossAccountId,1357		operator: &T::CrossAccountId,1358	) -> bool {1359		<CollectionAllowance<T>>::get((collection.id, owner, operator))1360	}13611362	pub fn repair_item(collection: &NonfungibleHandle<T>, token: TokenId) -> DispatchResult {1363		<TokenProperties<T>>::mutate((collection.id, token), |properties| {1364			if let Some(properties) = properties {1365				properties.recompute_consumed_space();1366			}1367		});13681369		Ok(())1370	}1371}