git.delta.rocks / unique-network / refs/commits / 7a034de544fd

1//2// This file is subject to the terms and conditions defined in3// file 'LICENSE', which is part of this source code package.4//56#![recursion_limit = "1024"]7#![cfg_attr(not(feature = "std"), no_std)]8#![allow(9	clippy::too_many_arguments,10	clippy::unnecessary_mut_passed,11	clippy::unused_unit12)]1314extern crate alloc;1516pub use serde::{Serialize, Deserialize};1718pub use frame_support::{19	construct_runtime, decl_event, decl_module, decl_storage, decl_error,20	dispatch::DispatchResult,21	ensure, fail, parameter_types,22	traits::{23		Currency, ExistenceRequirement, Get, Imbalance, KeyOwnerProofSystem, OnUnbalanced,24		Randomness, IsSubType, WithdrawReasons,25	},26	weights::{27		constants::{BlockExecutionWeight, ExtrinsicBaseWeight, RocksDbWeight, WEIGHT_PER_SECOND},28		DispatchInfo, GetDispatchInfo, IdentityFee, Pays, PostDispatchInfo, Weight,29		WeightToFeePolynomial, DispatchClass,30	},31	StorageValue, transactional,32};3334use frame_system::{self as system, ensure_signed};35use sp_core::H160;36use sp_std::vec;37use sp_runtime::sp_std::prelude::Vec;38use core::ops::{Deref, DerefMut};39use nft_data_structs::{40	MAX_DECIMAL_POINTS, MAX_SPONSOR_TIMEOUT, MAX_TOKEN_OWNERSHIP, MAX_REFUNGIBLE_PIECES,41	CUSTOM_DATA_LIMIT, COLLECTION_NUMBER_LIMIT, ACCOUNT_TOKEN_OWNERSHIP_LIMIT,42	VARIABLE_ON_CHAIN_SCHEMA_LIMIT, CONST_ON_CHAIN_SCHEMA_LIMIT, COLLECTION_ADMINS_LIMIT,43	OFFCHAIN_SCHEMA_LIMIT, AccessMode, Collection, CreateItemData, CollectionLimits, CollectionId,44	CollectionMode, TokenId, SchemaVersion, SponsorshipState, Ownership, NftItemType,45	FungibleItemType, ReFungibleItemType,46};4748#[cfg(test)]49mod mock;5051#[cfg(test)]52mod tests;5354mod default_weights;55mod eth;56mod sponsorship;57pub use sponsorship::NftSponsorshipHandler;58pub use eth::sponsoring::NftEthSponsorshipHandler;5960pub use eth::NftErcSupport;61pub use eth::account::*;62use eth::erc::{ERC20Events, ERC721Events};6364#[cfg(feature = "runtime-benchmarks")]65mod benchmarking;6667pub trait WeightInfo {68	fn create_collection() -> Weight;69	fn destroy_collection() -> Weight;70	fn add_to_white_list() -> Weight;71	fn remove_from_white_list() -> Weight;72	fn set_public_access_mode() -> Weight;73	fn set_mint_permission() -> Weight;74	fn change_collection_owner() -> Weight;75	fn add_collection_admin() -> Weight;76	fn remove_collection_admin() -> Weight;77	fn set_collection_sponsor() -> Weight;78	fn confirm_sponsorship() -> Weight;79	fn remove_collection_sponsor() -> Weight;80	fn create_item(s: usize) -> Weight;81	fn burn_item() -> Weight;82	fn transfer() -> Weight;83	fn approve() -> Weight;84	fn transfer_from() -> Weight;85	fn set_offchain_schema() -> Weight;86	fn set_const_on_chain_schema() -> Weight;87	fn set_variable_on_chain_schema() -> Weight;88	fn set_variable_meta_data() -> Weight;89	fn enable_contract_sponsoring() -> Weight;90	fn set_schema_version() -> Weight;91	fn set_chain_limits() -> Weight;92	fn set_contract_sponsoring_rate_limit() -> Weight;93	fn set_variable_meta_data_sponsoring_rate_limit() -> Weight;94	fn toggle_contract_white_list() -> Weight;95	fn add_to_contract_white_list() -> Weight;96	fn remove_from_contract_white_list() -> Weight;97	fn set_collection_limits() -> Weight;98}99100decl_error! {101	/// Error for non-fungible-token module.102	pub enum Error for Module<T: Config> {103		/// Total collections bound exceeded.104		TotalCollectionsLimitExceeded,105		/// Decimal_points parameter must be lower than MAX_DECIMAL_POINTS constant, currently it is 30.106		CollectionDecimalPointLimitExceeded,107		/// Collection name can not be longer than 63 char.108		CollectionNameLimitExceeded,109		/// Collection description can not be longer than 255 char.110		CollectionDescriptionLimitExceeded,111		/// Token prefix can not be longer than 15 char.112		CollectionTokenPrefixLimitExceeded,113		/// This collection does not exist.114		CollectionNotFound,115		/// Item not exists.116		TokenNotFound,117		/// Admin not found118		AdminNotFound,119		/// Arithmetic calculation overflow.120		NumOverflow,121		/// Account already has admin role.122		AlreadyAdmin,123		/// You do not own this collection.124		NoPermission,125		/// This address is not set as sponsor, use setCollectionSponsor first.126		ConfirmUnsetSponsorFail,127		/// Collection is not in mint mode.128		PublicMintingNotAllowed,129		/// Sender parameter and item owner must be equal.130		MustBeTokenOwner,131		/// Item balance not enough.132		TokenValueTooLow,133		/// Size of item is too large.134		NftSizeLimitExceeded,135		/// No approve found136		ApproveNotFound,137		/// Requested value more than approved.138		TokenValueNotEnough,139		/// Only approved addresses can call this method.140		ApproveRequired,141		/// Address is not in white list.142		AddresNotInWhiteList,143		/// Number of collection admins bound exceeded.144		CollectionAdminsLimitExceeded,145		/// Owned tokens by a single address bound exceeded.146		AddressOwnershipLimitExceeded,147		/// Length of items properties must be greater than 0.148		EmptyArgument,149		/// const_data exceeded data limit.150		TokenConstDataLimitExceeded,151		/// variable_data exceeded data limit.152		TokenVariableDataLimitExceeded,153		/// Not NFT item data used to mint in NFT collection.154		NotNftDataUsedToMintNftCollectionToken,155		/// Not Fungible item data used to mint in Fungible collection.156		NotFungibleDataUsedToMintFungibleCollectionToken,157		/// Not Re Fungible item data used to mint in Re Fungible collection.158		NotReFungibleDataUsedToMintReFungibleCollectionToken,159		/// Unexpected collection type.160		UnexpectedCollectionType,161		/// Can't store metadata in fungible tokens.162		CantStoreMetadataInFungibleTokens,163		/// Collection token limit exceeded164		CollectionTokenLimitExceeded,165		/// Account token limit exceeded per collection166		AccountTokenLimitExceeded,167		/// Collection limit bounds per collection exceeded168		CollectionLimitBoundsExceeded,169		/// Tried to enable permissions which are only permitted to be disabled170		OwnerPermissionsCantBeReverted,171		/// Schema data size limit bound exceeded172		SchemaDataLimitExceeded,173		/// Maximum refungibility exceeded174		WrongRefungiblePieces,175		/// createRefungible should be called with one owner176		BadCreateRefungibleCall,177		/// Gas limit exceeded178		OutOfGas,179		/// Collection settings not allowing items transferring180		TransferNotAllowed,181	}182}183184#[must_use = "Should call submit_logs or save, otherwise some data will be lost for evm side"]185pub struct CollectionHandle<T: Config> {186	pub id: CollectionId,187	collection: Collection<T>,188	recorder: pallet_evm_coder_substrate::SubstrateRecorder<T>,189}190impl<T: Config> CollectionHandle<T> {191	pub fn get_with_gas_limit(id: CollectionId, gas_limit: u64) -> Option<Self> {192		<CollectionById<T>>::get(id).map(|collection| Self {193			id,194			collection,195			recorder: pallet_evm_coder_substrate::SubstrateRecorder::new(196				eth::collection_id_to_address(id),197				gas_limit,198			),199		})200	}201	pub fn get(id: CollectionId) -> Option<Self> {202		Self::get_with_gas_limit(id, u64::MAX)203	}204	pub fn log(&self, log: impl evm_coder::ToLog) -> DispatchResult {205		self.recorder.log_sub(log)206	}207	fn consume_gas(&self, gas: u64) -> DispatchResult {208		self.recorder.consume_gas_sub(gas)209	}210	pub fn submit_logs(self) -> DispatchResult {211		self.recorder.submit_logs()212	}213	pub fn save(self) -> DispatchResult {214		self.recorder.submit_logs()?;215		<CollectionById<T>>::insert(self.id, self.collection);216		Ok(())217	}218}219impl<T: Config> Deref for CollectionHandle<T> {220	type Target = Collection<T>;221222	fn deref(&self) -> &Self::Target {223		&self.collection224	}225}226227impl<T: Config> DerefMut for CollectionHandle<T> {228	fn deref_mut(&mut self) -> &mut Self::Target {229		&mut self.collection230	}231}232233pub trait Config: system::Config + pallet_evm_coder_substrate::Config + Sized {234	type Event: From<Event<Self>> + Into<<Self as system::Config>::Event>;235236	/// Weight information for extrinsics in this pallet.237	type WeightInfo: WeightInfo;238239	type EvmAddressMapping: pallet_evm::AddressMapping<Self::AccountId>;240	type EvmBackwardsAddressMapping: EvmBackwardsAddressMapping<Self::AccountId>;241242	type CrossAccountId: CrossAccountId<Self::AccountId>;243	type Currency: Currency<Self::AccountId>;244	type CollectionCreationPrice: Get<245		<<Self as Config>::Currency as Currency<Self::AccountId>>::Balance,246	>;247	type TreasuryAccountId: Get<Self::AccountId>;248}249250// # Used definitions251//252// ## User control levels253//254// chain-controlled - key is uncontrolled by user255//                    i.e autoincrementing index256//                    can use non-cryptographic hash257// real - key is controlled by user258//        but it is hard to generate enough colliding values, i.e owner of signed txs259//        can use non-cryptographic hash260// controlled - key is completly controlled by users261//              i.e maps with mutable keys262//              should use cryptographic hash263//264// ## User control level downgrade reasons265//266// ?1 - chain-controlled -> controlled267//      collections/tokens can be destroyed, resulting in massive holes268// ?2 - chain-controlled -> controlled269//      same as ?1, but can be only added, resulting in easier exploitation270// ?3 - real -> controlled271//      no confirmation required, so addresses can be easily generated272decl_storage! {273	trait Store for Module<T: Config> as Nft {274275		//#region Private members276		/// Id of next collection277		CreatedCollectionCount: u32;278		/// Used for migrations279		ChainVersion: u64;280		/// Id of last collection token281		/// Collection id (controlled?1)282		ItemListIndex: map hasher(blake2_128_concat) CollectionId => TokenId;283		//#endregion284285		//#region Bound counters286		/// Amount of collections destroyed, used for total amount tracking with287		/// CreatedCollectionCount288		DestroyedCollectionCount: u32;289		/// Total amount of account owned tokens (NFTs + RFTs + unique fungibles)290		/// Account id (real)291		pub AccountItemCount get(fn account_item_count): map hasher(twox_64_concat) T::AccountId => u32;292		//#endregion293294		//#region Basic collections295		/// Collection info296		/// Collection id (controlled?1)297		pub CollectionById get(fn collection_id) config(): map hasher(blake2_128_concat) CollectionId => Option<Collection<T>> = None;298		/// List of collection admins299		/// Collection id (controlled?2)300		pub AdminList get(fn admin_list_collection): map hasher(blake2_128_concat) CollectionId => Vec<T::CrossAccountId>;301		/// Whitelisted collection users302		/// Collection id (controlled?2), user id (controlled?3)303		pub WhiteList get(fn white_list): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) T::AccountId => bool;304		//#endregion305306		/// How many of collection items user have307		/// Collection id (controlled?2), account id (real)308		pub Balance get(fn balance_count): double_map hasher(blake2_128_concat) CollectionId, hasher(twox_64_concat) T::AccountId => u128;309310		/// Amount of items which spender can transfer out of owners account (via transferFrom)311		/// Collection id (controlled?2), (token id (controlled ?2) + owner account id (real) + spender account id (controlled?3))312		/// TODO: Off chain worker should remove from this map when token gets removed313		pub Allowances get(fn approved): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) (TokenId, T::AccountId, T::AccountId) => u128;314315		//#region Item collections316		/// Collection id (controlled?2), token id (controlled?1)317		pub NftItemList get(fn nft_item_id) config(): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => Option<NftItemType<T::CrossAccountId>>;318		/// Collection id (controlled?2), owner (controlled?2)319		pub FungibleItemList get(fn fungible_item_id) config(): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) T::AccountId => FungibleItemType;320		/// Collection id (controlled?2), token id (controlled?1)321		pub ReFungibleItemList get(fn refungible_item_id) config(): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => Option<ReFungibleItemType<T::CrossAccountId>>;322		//#endregion323324		//#region Index list325		/// Collection id (controlled?2), tokens owner (controlled?2)326		pub AddressTokens get(fn address_tokens): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) T::AccountId => Vec<TokenId>;327		//#endregion328329		//#region Tokens transfer rate limit baskets330		/// (Collection id (controlled?2), who created (real))331		/// TODO: Off chain worker should remove from this map when collection gets removed332		pub CreateItemBasket get(fn create_item_basket): map hasher(blake2_128_concat) (CollectionId, T::AccountId) => T::BlockNumber;333		/// Collection id (controlled?2), token id (controlled?2)334		pub NftTransferBasket get(fn nft_transfer_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => T::BlockNumber;335		/// Collection id (controlled?2), owning user (real)336		pub FungibleTransferBasket get(fn fungible_transfer_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(twox_64_concat) T::AccountId => T::BlockNumber;337		/// Collection id (controlled?2), token id (controlled?2)338		pub ReFungibleTransferBasket get(fn refungible_transfer_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => T::BlockNumber;339		//#endregion340341		/// Variable metadata sponsoring342		/// Collection id (controlled?2), token id (controlled?2)343		pub VariableMetaDataBasket get(fn variable_meta_data_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => Option<T::BlockNumber> = None;344	}345	add_extra_genesis {346		build(|config: &GenesisConfig<T>| {347			// Modification of storage348			for (_num, _c) in &config.collection_id {349				<Module<T>>::init_collection(_c);350			}351352			for (_num, _c, _i) in &config.nft_item_id {353				<Module<T>>::init_nft_token(*_c, _i);354			}355356			for (collection_id, account_id, fungible_item) in &config.fungible_item_id {357				<Module<T>>::init_fungible_token(*collection_id, &T::CrossAccountId::from_sub(account_id.clone()), fungible_item);358			}359360			for (_num, _c, _i) in &config.refungible_item_id {361				<Module<T>>::init_refungible_token(*_c, _i);362			}363		})364	}365}366367decl_event!(368	pub enum Event<T>369	where370		AccountId = <T as frame_system::Config>::AccountId,371		CrossAccountId = <T as Config>::CrossAccountId,372	{373		/// New collection was created374		///375		/// # Arguments376		///377		/// * collection_id: Globally unique identifier of newly created collection.378		///379		/// * mode: [CollectionMode] converted into u8.380		///381		/// * account_id: Collection owner.382		CollectionCreated(CollectionId, u8, AccountId),383384		/// New item was created.385		///386		/// # Arguments387		///388		/// * collection_id: Id of the collection where item was created.389		///390		/// * item_id: Id of an item. Unique within the collection.391		///392		/// * recipient: Owner of newly created item393		ItemCreated(CollectionId, TokenId, CrossAccountId),394395		/// Collection item was burned.396		///397		/// # Arguments398		///399		/// collection_id.400		///401		/// item_id: Identifier of burned NFT.402		ItemDestroyed(CollectionId, TokenId),403404		/// Item was transferred405		///406		/// * collection_id: Id of collection to which item is belong407		///408		/// * item_id: Id of an item409		///410		/// * sender: Original owner of item411		///412		/// * recipient: New owner of item413		///414		/// * amount: Always 1 for NFT415		Transfer(CollectionId, TokenId, CrossAccountId, CrossAccountId, u128),416417		/// * collection_id418		///419		/// * item_id420		///421		/// * sender422		///423		/// * spender424		///425		/// * amount426		Approved(CollectionId, TokenId, CrossAccountId, CrossAccountId, u128),427	}428);429430decl_module! {431	pub struct Module<T: Config> for enum Call432	where433		origin: T::Origin434	{435		fn deposit_event() = default;436		type Error = Error<T>;437438		fn on_initialize(_now: T::BlockNumber) -> Weight {439			0440		}441442		/// This method creates a Collection of NFTs. Each Token may have multiple properties encoded as an array of bytes of certain length. The initial owner and admin of the collection are set to the address that signed the transaction. Both addresses can be changed later.443		///444		/// # Permissions445		///446		/// * Anyone.447		///448		/// # Arguments449		///450		/// * collection_name: UTF-16 string with collection name (limit 64 characters), will be stored as zero-terminated.451		///452		/// * collection_description: UTF-16 string with collection description (limit 256 characters), will be stored as zero-terminated.453		///454		/// * token_prefix: UTF-8 string with token prefix.455		///456		/// * mode: [CollectionMode] collection type and type dependent data.457		// returns collection ID458		#[weight = <T as Config>::WeightInfo::create_collection()]459		#[transactional]460		pub fn create_collection(origin,461								 collection_name: Vec<u16>,462								 collection_description: Vec<u16>,463								 token_prefix: Vec<u8>,464								 mode: CollectionMode) -> DispatchResult {465466			// Anyone can create a collection467			let who = ensure_signed(origin)?;468469			// Take a (non-refundable) deposit of collection creation470			let mut imbalance = <<<T as Config>::Currency as Currency<T::AccountId>>::PositiveImbalance>::zero();471			imbalance.subsume(<<T as Config>::Currency as Currency<T::AccountId>>::deposit_creating(472				&T::TreasuryAccountId::get(),473				T::CollectionCreationPrice::get(),474			));475			<T as Config>::Currency::settle(476				&who,477				imbalance,478				WithdrawReasons::TRANSFER,479				ExistenceRequirement::KeepAlive,480			).map_err(|_| Error::<T>::NoPermission)?;481482			let decimal_points = match mode {483				CollectionMode::Fungible(points) => points,484				_ => 0485			};486487			let created_count = CreatedCollectionCount::get();488			let destroyed_count = DestroyedCollectionCount::get();489490			// bound Total number of collections491			ensure!(created_count - destroyed_count < COLLECTION_NUMBER_LIMIT, Error::<T>::TotalCollectionsLimitExceeded);492493			// check params494			ensure!(decimal_points <= MAX_DECIMAL_POINTS, Error::<T>::CollectionDecimalPointLimitExceeded);495			ensure!(collection_name.len() <= 64, Error::<T>::CollectionNameLimitExceeded);496			ensure!(collection_description.len() <= 256, Error::<T>::CollectionDescriptionLimitExceeded);497			ensure!(token_prefix.len() <= 16, Error::<T>::CollectionTokenPrefixLimitExceeded);498499			// Generate next collection ID500			let next_id = created_count501				.checked_add(1)502				.ok_or(Error::<T>::NumOverflow)?;503504			CreatedCollectionCount::put(next_id);505506			let limits = CollectionLimits {507				sponsored_data_size: CUSTOM_DATA_LIMIT,508				..Default::default()509			};510511			// Create new collection512			let new_collection = Collection {513				owner: who.clone(),514				name: collection_name,515				mode: mode.clone(),516				mint_mode: false,517				access: AccessMode::Normal,518				description: collection_description,519				decimal_points,520				token_prefix,521				offchain_schema: Vec::new(),522				schema_version: SchemaVersion::ImageURL,523				sponsorship: SponsorshipState::Disabled,524				variable_on_chain_schema: Vec::new(),525				const_on_chain_schema: Vec::new(),526				limits,527				transfers_enabled: true,528			};529530			// Add new collection to map531			<CollectionById<T>>::insert(next_id, new_collection);532533			// call event534			Self::deposit_event(RawEvent::CollectionCreated(next_id, mode.id(), who));535536			Ok(())537		}538539		/// **DANGEROUS**: Destroys collection and all NFTs within this collection. Users irrecoverably lose their assets and may lose real money.540		///541		/// # Permissions542		///543		/// * Collection Owner.544		///545		/// # Arguments546		///547		/// * collection_id: collection to destroy.548		#[weight = <T as Config>::WeightInfo::destroy_collection()]549		#[transactional]550		pub fn destroy_collection(origin, collection_id: CollectionId) -> DispatchResult {551552			let sender = ensure_signed(origin)?;553			let collection = Self::get_collection(collection_id)?;554			Self::check_owner_permissions(&collection, &sender)?;555			if !collection.limits.owner_can_destroy {556				fail!(Error::<T>::NoPermission);557			}558559			<AddressTokens<T>>::remove_prefix(collection_id, None);560			<Allowances<T>>::remove_prefix(collection_id, None);561			<Balance<T>>::remove_prefix(collection_id, None);562			<ItemListIndex>::remove(collection_id);563			<AdminList<T>>::remove(collection_id);564			<CollectionById<T>>::remove(collection_id);565			<WhiteList<T>>::remove_prefix(collection_id, None);566567			<NftItemList<T>>::remove_prefix(collection_id, None);568			<FungibleItemList<T>>::remove_prefix(collection_id, None);569			<ReFungibleItemList<T>>::remove_prefix(collection_id, None);570571			<NftTransferBasket<T>>::remove_prefix(collection_id, None);572			<FungibleTransferBasket<T>>::remove_prefix(collection_id, None);573			<ReFungibleTransferBasket<T>>::remove_prefix(collection_id, None);574575			<VariableMetaDataBasket<T>>::remove_prefix(collection_id, None);576577			DestroyedCollectionCount::put(DestroyedCollectionCount::get()578				.checked_add(1)579				.ok_or(Error::<T>::NumOverflow)?);580581			Ok(())582		}583584		/// Add an address to white list.585		///586		/// # Permissions587		///588		/// * Collection Owner589		/// * Collection Admin590		///591		/// # Arguments592		///593		/// * collection_id.594		///595		/// * address.596		#[weight = <T as Config>::WeightInfo::add_to_white_list()]597		#[transactional]598		pub fn add_to_white_list(origin, collection_id: CollectionId, address: T::CrossAccountId) -> DispatchResult{599600			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);601			let collection = Self::get_collection(collection_id)?;602603			Self::toggle_white_list_internal(604				&sender,605				&collection,606				&address,607				true,608			)?;609610			Ok(())611		}612613		/// Remove an address from white list.614		///615		/// # Permissions616		///617		/// * Collection Owner618		/// * Collection Admin619		///620		/// # Arguments621		///622		/// * collection_id.623		///624		/// * address.625		#[weight = <T as Config>::WeightInfo::remove_from_white_list()]626		#[transactional]627		pub fn remove_from_white_list(origin, collection_id: CollectionId, address: T::CrossAccountId) -> DispatchResult{628629			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);630			let collection = Self::get_collection(collection_id)?;631632			Self::toggle_white_list_internal(633				&sender,634				&collection,635				&address,636				false,637			)?;638639			Ok(())640		}641642		/// Toggle between normal and white list access for the methods with access for `Anyone`.643		///644		/// # Permissions645		///646		/// * Collection Owner.647		///648		/// # Arguments649		///650		/// * collection_id.651		///652		/// * mode: [AccessMode]653		#[weight = <T as Config>::WeightInfo::set_public_access_mode()]654		#[transactional]655		pub fn set_public_access_mode(origin, collection_id: CollectionId, mode: AccessMode) -> DispatchResult656		{657			let sender = ensure_signed(origin)?;658659			let mut target_collection = Self::get_collection(collection_id)?;660			Self::check_owner_permissions(&target_collection, &sender)?;661			target_collection.access = mode;662			target_collection.save()663		}664665		/// Allows Anyone to create tokens if:666		/// * White List is enabled, and667		/// * Address is added to white list, and668		/// * This method was called with True parameter669		///670		/// # Permissions671		/// * Collection Owner672		///673		/// # Arguments674		///675		/// * collection_id.676		///677		/// * mint_permission: Boolean parameter. If True, allows minting to Anyone with conditions above.678		#[weight = <T as Config>::WeightInfo::set_mint_permission()]679		#[transactional]680		pub fn set_mint_permission(origin, collection_id: CollectionId, mint_permission: bool) -> DispatchResult681		{682			let sender = ensure_signed(origin)?;683684			let mut target_collection = Self::get_collection(collection_id)?;685			Self::check_owner_permissions(&target_collection, &sender)?;686			target_collection.mint_mode = mint_permission;687			target_collection.save()688		}689690		/// Change the owner of the collection.691		///692		/// # Permissions693		///694		/// * Collection Owner.695		///696		/// # Arguments697		///698		/// * collection_id.699		///700		/// * new_owner.701		#[weight = <T as Config>::WeightInfo::change_collection_owner()]702		#[transactional]703		pub fn change_collection_owner(origin, collection_id: CollectionId, new_owner: T::AccountId) -> DispatchResult {704705			let sender = ensure_signed(origin)?;706			let mut target_collection = Self::get_collection(collection_id)?;707			Self::check_owner_permissions(&target_collection, &sender)?;708			target_collection.owner = new_owner;709			target_collection.save()710		}711712		/// Adds an admin of the Collection.713		/// NFT Collection can be controlled by multiple admin addresses (some which can also be servers, for example). Admins can issue and burn NFTs, as well as add and remove other admins, but cannot change NFT or Collection ownership.714		///715		/// # Permissions716		///717		/// * Collection Owner.718		/// * Collection Admin.719		///720		/// # Arguments721		///722		/// * collection_id: ID of the Collection to add admin for.723		///724		/// * new_admin_id: Address of new admin to add.725		#[weight = <T as Config>::WeightInfo::add_collection_admin()]726		#[transactional]727		pub fn add_collection_admin(origin, collection_id: CollectionId, new_admin_id: T::CrossAccountId) -> DispatchResult {728			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);729			let collection = Self::get_collection(collection_id)?;730			Self::check_owner_or_admin_permissions(&collection, &sender)?;731			let mut admin_arr = <AdminList<T>>::get(collection_id);732733			match admin_arr.binary_search(&new_admin_id) {734				Ok(_) => {},735				Err(idx) => {736					ensure!(admin_arr.len() < COLLECTION_ADMINS_LIMIT as usize, Error::<T>::CollectionAdminsLimitExceeded);737					admin_arr.insert(idx, new_admin_id);738					<AdminList<T>>::insert(collection_id, admin_arr);739				}740			}741			Ok(())742		}743744		/// Remove admin address of the Collection. An admin address can remove itself. List of admins may become empty, in which case only Collection Owner will be able to add an Admin.745		///746		/// # Permissions747		///748		/// * Collection Owner.749		/// * Collection Admin.750		///751		/// # Arguments752		///753		/// * collection_id: ID of the Collection to remove admin for.754		///755		/// * account_id: Address of admin to remove.756		#[weight = <T as Config>::WeightInfo::remove_collection_admin()]757		#[transactional]758		pub fn remove_collection_admin(origin, collection_id: CollectionId, account_id: T::CrossAccountId) -> DispatchResult {759			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);760			let collection = Self::get_collection(collection_id)?;761			Self::check_owner_or_admin_permissions(&collection, &sender)?;762			let mut admin_arr = <AdminList<T>>::get(collection_id);763764			if let Ok(idx) = admin_arr.binary_search(&account_id) {765				admin_arr.remove(idx);766				<AdminList<T>>::insert(collection_id, admin_arr);767			}768			Ok(())769		}770771		/// # Permissions772		///773		/// * Collection Owner774		///775		/// # Arguments776		///777		/// * collection_id.778		///779		/// * new_sponsor.780		#[weight = <T as Config>::WeightInfo::set_collection_sponsor()]781		#[transactional]782		pub fn set_collection_sponsor(origin, collection_id: CollectionId, new_sponsor: T::AccountId) -> DispatchResult {783			let sender = ensure_signed(origin)?;784			let mut target_collection = Self::get_collection(collection_id)?;785			Self::check_owner_permissions(&target_collection, &sender)?;786787			target_collection.sponsorship = SponsorshipState::Unconfirmed(new_sponsor);788			target_collection.save()789		}790791		/// # Permissions792		///793		/// * Sponsor.794		///795		/// # Arguments796		///797		/// * collection_id.798		#[weight = <T as Config>::WeightInfo::confirm_sponsorship()]799		#[transactional]800		pub fn confirm_sponsorship(origin, collection_id: CollectionId) -> DispatchResult {801			let sender = ensure_signed(origin)?;802803			let mut target_collection = Self::get_collection(collection_id)?;804			ensure!(805				target_collection.sponsorship.pending_sponsor() == Some(&sender),806				Error::<T>::ConfirmUnsetSponsorFail807			);808809			target_collection.sponsorship = SponsorshipState::Confirmed(sender);810			target_collection.save()811		}812813		/// Switch back to pay-per-own-transaction model.814		///815		/// # Permissions816		///817		/// * Collection owner.818		///819		/// # Arguments820		///821		/// * collection_id.822		#[weight = <T as Config>::WeightInfo::remove_collection_sponsor()]823		#[transactional]824		pub fn remove_collection_sponsor(origin, collection_id: CollectionId) -> DispatchResult {825			let sender = ensure_signed(origin)?;826827			let mut target_collection = Self::get_collection(collection_id)?;828			Self::check_owner_permissions(&target_collection, &sender)?;829830			target_collection.sponsorship = SponsorshipState::Disabled;831			target_collection.save()832		}833834		/// This method creates a concrete instance of NFT Collection created with CreateCollection method.835		///836		/// # Permissions837		///838		/// * Collection Owner.839		/// * Collection Admin.840		/// * Anyone if841		///     * White List is enabled, and842		///     * Address is added to white list, and843		///     * MintPermission is enabled (see SetMintPermission method)844		///845		/// # Arguments846		///847		/// * collection_id: ID of the collection.848		///849		/// * owner: Address, initial owner of the NFT.850		///851		/// * data: Token data to store on chain.852		// #[weight =853		// (130_000_000 as Weight)854		// .saturating_add((2135 as Weight).saturating_mul((properties.len() as u64) as Weight))855		// .saturating_add(RocksDbWeight::get().reads(10 as Weight))856		// .saturating_add(RocksDbWeight::get().writes(8 as Weight))]857858		#[weight = <T as Config>::WeightInfo::create_item(data.data_size())]859		#[transactional]860		pub fn create_item(origin, collection_id: CollectionId, owner: T::CrossAccountId, data: CreateItemData) -> DispatchResult {861			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);862			let collection = Self::get_collection(collection_id)?;863864			Self::create_item_internal(&sender, &collection, &owner, data)?;865866			collection.submit_logs()867		}868869		/// This method creates multiple items in a collection created with CreateCollection method.870		///871		/// # Permissions872		///873		/// * Collection Owner.874		/// * Collection Admin.875		/// * Anyone if876		///     * White List is enabled, and877		///     * Address is added to white list, and878		///     * MintPermission is enabled (see SetMintPermission method)879		///880		/// # Arguments881		///882		/// * collection_id: ID of the collection.883		///884		/// * itemsData: Array items properties. Each property is an array of bytes itself, see [create_item].885		///886		/// * owner: Address, initial owner of the NFT.887		#[weight = <T as Config>::WeightInfo::create_item(items_data.iter()888							   .map(|data| { data.data_size() })889							   .sum())]890		#[transactional]891		pub fn create_multiple_items(origin, collection_id: CollectionId, owner: T::CrossAccountId, items_data: Vec<CreateItemData>) -> DispatchResult {892893			ensure!(!items_data.is_empty(), Error::<T>::EmptyArgument);894			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);895			let collection = Self::get_collection(collection_id)?;896897			Self::create_multiple_items_internal(&sender, &collection, &owner, items_data)?;898899			collection.submit_logs()900		}901902		// TODO! transaction weight903904		/// Set transfers_enabled value for particular collection905		///906		/// # Permissions907		///908		/// * Collection Owner.909		///910		/// # Arguments911		///912		/// * collection_id: ID of the collection.913		///914		/// * value: New flag value.915		#[weight = <T as Config>::WeightInfo::burn_item()]916		#[transactional]917		pub fn set_transfers_enabled_flag(origin, collection_id: CollectionId, value: bool) -> DispatchResult {918919			let sender = ensure_signed(origin)?;920			let mut target_collection = Self::get_collection(collection_id)?;921922			Self::check_owner_permissions(&target_collection, &sender)?;923924			target_collection.transfers_enabled = value;925			target_collection.save()926		}927928		/// Destroys a concrete instance of NFT.929		///930		/// # Permissions931		///932		/// * Collection Owner.933		/// * Collection Admin.934		/// * Current NFT Owner.935		///936		/// # Arguments937		///938		/// * collection_id: ID of the collection.939		///940		/// * item_id: ID of NFT to burn.941		#[weight = <T as Config>::WeightInfo::burn_item()]942		#[transactional]943		pub fn burn_item(origin, collection_id: CollectionId, item_id: TokenId, value: u128) -> DispatchResult {944945			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);946			let target_collection = Self::get_collection(collection_id)?;947948			Self::burn_item_internal(&sender, &target_collection, item_id, value)?;949950			target_collection.submit_logs()951		}952953		/// Change ownership of the token.954		///955		/// # Permissions956		///957		/// * Collection Owner958		/// * Collection Admin959		/// * Current NFT owner960		///961		/// # Arguments962		///963		/// * recipient: Address of token recipient.964		///965		/// * collection_id.966		///967		/// * item_id: ID of the item968		///     * Non-Fungible Mode: Required.969		///     * Fungible Mode: Ignored.970		///     * Re-Fungible Mode: Required.971		///972		/// * value: Amount to transfer.973		///     * Non-Fungible Mode: Ignored974		///     * Fungible Mode: Must specify transferred amount975		///     * Re-Fungible Mode: Must specify transferred portion (between 0 and 1)976		#[weight = <T as Config>::WeightInfo::transfer()]977		#[transactional]978		pub fn transfer(origin, recipient: T::CrossAccountId, collection_id: CollectionId, item_id: TokenId, value: u128) -> DispatchResult {979			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);980			let collection = Self::get_collection(collection_id)?;981982			Self::transfer_internal(&sender, &recipient, &collection, item_id, value)?;983984			collection.submit_logs()985		}986987		/// Set, change, or remove approved address to transfer the ownership of the NFT.988		///989		/// # Permissions990		///991		/// * Collection Owner992		/// * Collection Admin993		/// * Current NFT owner994		///995		/// # Arguments996		///997		/// * approved: Address that is approved to transfer this NFT or zero (if needed to remove approval).998		///999		/// * collection_id.1000		///1001		/// * item_id: ID of the item.1002		#[weight = <T as Config>::WeightInfo::approve()]1003		#[transactional]1004		pub fn approve(origin, spender: T::CrossAccountId, collection_id: CollectionId, item_id: TokenId, amount: u128) -> DispatchResult {1005			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);1006			let collection = Self::get_collection(collection_id)?;10071008			Self::approve_internal(&sender, &spender, &collection, item_id, amount)?;10091010			collection.submit_logs()1011		}10121013		/// Change ownership of a NFT on behalf of the owner. See Approve method for additional information. After this method executes, the approval is removed so that the approved address will not be able to transfer this NFT again from this owner.1014		///1015		/// # Permissions1016		/// * Collection Owner1017		/// * Collection Admin1018		/// * Current NFT owner1019		/// * Address approved by current NFT owner1020		///1021		/// # Arguments1022		///1023		/// * from: Address that owns token.1024		///1025		/// * recipient: Address of token recipient.1026		///1027		/// * collection_id.1028		///1029		/// * item_id: ID of the item.1030		///1031		/// * value: Amount to transfer.1032		#[weight = <T as Config>::WeightInfo::transfer_from()]1033		#[transactional]1034		pub fn transfer_from(origin, from: T::CrossAccountId, recipient: T::CrossAccountId, collection_id: CollectionId, item_id: TokenId, value: u128 ) -> DispatchResult {1035			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);1036			let collection = Self::get_collection(collection_id)?;10371038			Self::transfer_from_internal(&sender, &from, &recipient, &collection, item_id, value)?;10391040			collection.submit_logs()1041		}1042		// #[weight = 0]1043		//     // let no_perm_mes = "You do not have permissions to modify this collection";1044		//     // ensure!(<ApprovedList<T>>::contains_key((collection_id, item_id)), no_perm_mes);1045		//     // let list_itm = <ApprovedList<T>>::get((collection_id, item_id));1046		//     // ensure!(list_itm.contains(&new_owner.clone()), no_perm_mes);10471048		//     // // on_nft_received  call10491050		//     // Self::transfer(origin, collection_id, item_id, new_owner)?;10511052		//     Ok(())1053		// }10541055		/// Set off-chain data schema.1056		///1057		/// # Permissions1058		///1059		/// * Collection Owner1060		/// * Collection Admin1061		///1062		/// # Arguments1063		///1064		/// * collection_id.1065		///1066		/// * schema: String representing the offchain data schema.1067		#[weight = <T as Config>::WeightInfo::set_variable_meta_data()]1068		#[transactional]1069		pub fn set_variable_meta_data (1070			origin,1071			collection_id: CollectionId,1072			item_id: TokenId,1073			data: Vec<u8>1074		) -> DispatchResult {1075			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);10761077			let collection = Self::get_collection(collection_id)?;10781079			Self::set_variable_meta_data_internal(&sender, &collection, item_id, data)?;10801081			Ok(())1082		}10831084		/// Set schema standard1085		/// ImageURL1086		/// Unique1087		///1088		/// # Permissions1089		///1090		/// * Collection Owner1091		/// * Collection Admin1092		///1093		/// # Arguments1094		///1095		/// * collection_id.1096		///1097		/// * schema: SchemaVersion: enum1098		#[weight = <T as Config>::WeightInfo::set_schema_version()]1099		#[transactional]1100		pub fn set_schema_version(1101			origin,1102			collection_id: CollectionId,1103			version: SchemaVersion1104		) -> DispatchResult {1105			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);1106			let mut target_collection = Self::get_collection(collection_id)?;1107			Self::check_owner_or_admin_permissions(&target_collection, &sender)?;1108			target_collection.schema_version = version;1109			target_collection.save()1110		}11111112		/// Set off-chain data schema.1113		///1114		/// # Permissions1115		///1116		/// * Collection Owner1117		/// * Collection Admin1118		///1119		/// # Arguments1120		///1121		/// * collection_id.1122		///1123		/// * schema: String representing the offchain data schema.1124		#[weight = <T as Config>::WeightInfo::set_offchain_schema()]1125		#[transactional]1126		pub fn set_offchain_schema(1127			origin,1128			collection_id: CollectionId,1129			schema: Vec<u8>1130		) -> DispatchResult {1131			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);1132			let mut target_collection = Self::get_collection(collection_id)?;1133			Self::check_owner_or_admin_permissions(&target_collection, &sender)?;11341135			// check schema limit1136			ensure!(schema.len() as u32 <= OFFCHAIN_SCHEMA_LIMIT, "");11371138			target_collection.offchain_schema = schema;1139			target_collection.save()1140		}11411142		/// Set const on-chain data schema.1143		///1144		/// # Permissions1145		///1146		/// * Collection Owner1147		/// * Collection Admin1148		///1149		/// # Arguments1150		///1151		/// * collection_id.1152		///1153		/// * schema: String representing the const on-chain data schema.1154		#[weight = <T as Config>::WeightInfo::set_const_on_chain_schema()]1155		#[transactional]1156		pub fn set_const_on_chain_schema (1157			origin,1158			collection_id: CollectionId,1159			schema: Vec<u8>1160		) -> DispatchResult {1161			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);1162			let mut target_collection = Self::get_collection(collection_id)?;1163			Self::check_owner_or_admin_permissions(&target_collection, &sender)?;11641165			// check schema limit1166			ensure!(schema.len() as u32 <= CONST_ON_CHAIN_SCHEMA_LIMIT, "");11671168			target_collection.const_on_chain_schema = schema;1169			target_collection.save()1170		}11711172		/// Set variable on-chain data schema.1173		///1174		/// # Permissions1175		///1176		/// * Collection Owner1177		/// * Collection Admin1178		///1179		/// # Arguments1180		///1181		/// * collection_id.1182		///1183		/// * schema: String representing the variable on-chain data schema.1184		#[weight = <T as Config>::WeightInfo::set_const_on_chain_schema()]1185		#[transactional]1186		pub fn set_variable_on_chain_schema (1187			origin,1188			collection_id: CollectionId,1189			schema: Vec<u8>1190		) -> DispatchResult {1191			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);1192			let mut target_collection = Self::get_collection(collection_id)?;1193			Self::check_owner_or_admin_permissions(&target_collection, &sender)?;11941195			// check schema limit1196			ensure!(schema.len() as u32 <= VARIABLE_ON_CHAIN_SCHEMA_LIMIT, "");11971198			target_collection.variable_on_chain_schema = schema;1199			target_collection.save()1200		}12011202		#[weight = <T as Config>::WeightInfo::set_collection_limits()]1203		#[transactional]1204		pub fn set_collection_limits(1205			origin,1206			collection_id: u32,1207			new_limits: CollectionLimits<T::BlockNumber>,1208		) -> DispatchResult {1209			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);1210			let mut target_collection = Self::get_collection(collection_id)?;1211			Self::check_owner_permissions(&target_collection, sender.as_sub())?;1212			let old_limits = &target_collection.limits;12131214			// collection bounds1215			ensure!(new_limits.sponsor_transfer_timeout <= MAX_SPONSOR_TIMEOUT &&1216				new_limits.account_token_ownership_limit <= MAX_TOKEN_OWNERSHIP &&1217				new_limits.sponsored_data_size <= CUSTOM_DATA_LIMIT,1218				Error::<T>::CollectionLimitBoundsExceeded);12191220			// token_limit   check  prev1221			ensure!(old_limits.token_limit >= new_limits.token_limit, Error::<T>::CollectionTokenLimitExceeded);1222			ensure!(new_limits.token_limit > 0, Error::<T>::CollectionTokenLimitExceeded);12231224			ensure!(1225				(old_limits.owner_can_transfer || !new_limits.owner_can_transfer) &&1226				(old_limits.owner_can_destroy || !new_limits.owner_can_destroy),1227				Error::<T>::OwnerPermissionsCantBeReverted,1228			);12291230			target_collection.limits = new_limits;12311232			target_collection.save()1233		}1234	}1235}12361237impl<T: Config> Module<T> {1238	pub fn create_item_internal(1239		sender: &T::CrossAccountId,1240		collection: &CollectionHandle<T>,1241		owner: &T::CrossAccountId,1242		data: CreateItemData,1243	) -> DispatchResult {1244		Self::can_create_items_in_collection(collection, sender, owner, 1)?;1245		Self::validate_create_item_args(collection, &data)?;1246		Self::create_item_no_validation(collection, owner, data)?;12471248		Ok(())1249	}12501251	pub fn transfer_internal(1252		sender: &T::CrossAccountId,1253		recipient: &T::CrossAccountId,1254		target_collection: &CollectionHandle<T>,1255		item_id: TokenId,1256		value: u128,1257	) -> DispatchResult {1258		target_collection.consume_gas(2000000)?;1259		// Limits check1260		Self::is_correct_transfer(target_collection, recipient)?;12611262		// Transfer permissions check1263		ensure!(1264			Self::is_item_owner(sender, target_collection, item_id)1265				|| Self::is_owner_or_admin_permissions(target_collection, sender),1266			Error::<T>::NoPermission1267		);12681269		if target_collection.access == AccessMode::WhiteList {1270			Self::check_white_list(target_collection, sender)?;1271			Self::check_white_list(target_collection, recipient)?;1272		}12731274		match target_collection.mode {1275			CollectionMode::NFT => Self::transfer_nft(1276				target_collection,1277				item_id,1278				sender.clone(),1279				recipient.clone(),1280			)?,1281			CollectionMode::Fungible(_) => {1282				Self::transfer_fungible(target_collection, value, sender, recipient)?1283			}1284			CollectionMode::ReFungible => Self::transfer_refungible(1285				target_collection,1286				item_id,1287				value,1288				sender.clone(),1289				recipient.clone(),1290			)?,1291			_ => (),1292		};12931294		Self::deposit_event(RawEvent::Transfer(1295			target_collection.id,1296			item_id,1297			sender.clone(),1298			recipient.clone(),1299			value,1300		));13011302		Ok(())1303	}13041305	pub fn approve_internal(1306		sender: &T::CrossAccountId,1307		spender: &T::CrossAccountId,1308		collection: &CollectionHandle<T>,1309		item_id: TokenId,1310		amount: u128,1311	) -> DispatchResult {1312		collection.consume_gas(2000000)?;1313		Self::token_exists(collection, item_id)?;13141315		// Transfer permissions check1316		let bypasses_limits = collection.limits.owner_can_transfer1317			&& Self::is_owner_or_admin_permissions(collection, sender);13181319		let allowance_limit = if bypasses_limits {1320			None1321		} else if let Some(amount) = Self::owned_amount(sender, collection, item_id) {1322			Some(amount)1323		} else {1324			fail!(Error::<T>::NoPermission);1325		};13261327		if collection.access == AccessMode::WhiteList {1328			Self::check_white_list(collection, sender)?;1329			Self::check_white_list(collection, spender)?;1330		}13311332		let allowance: u128 = amount1333			.checked_add(<Allowances<T>>::get(1334				collection.id,1335				(item_id, sender.as_sub(), spender.as_sub()),1336			))1337			.ok_or(Error::<T>::NumOverflow)?;1338		if let Some(limit) = allowance_limit {1339			ensure!(limit >= allowance, Error::<T>::TokenValueTooLow);1340		}1341		<Allowances<T>>::insert(1342			collection.id,1343			(item_id, sender.as_sub(), spender.as_sub()),1344			allowance,1345		);13461347		if matches!(collection.mode, CollectionMode::NFT) {1348			// TODO: NFT: only one owner may exist for token in ERC7211349			collection.log(ERC721Events::Approval {1350				owner: *sender.as_eth(),1351				approved: *spender.as_eth(),1352				token_id: item_id.into(),1353			})?;1354		}13551356		if matches!(collection.mode, CollectionMode::Fungible(_)) {1357			// TODO: NFT: only one owner may exist for token in ERC201358			collection.log(ERC20Events::Approval {1359				owner: *sender.as_eth(),1360				spender: *spender.as_eth(),1361				value: allowance.into(),1362			})?;1363		}13641365		Self::deposit_event(RawEvent::Approved(1366			collection.id,1367			item_id,1368			sender.clone(),1369			spender.clone(),1370			allowance,1371		));1372		Ok(())1373	}13741375	pub fn transfer_from_internal(1376		sender: &T::CrossAccountId,1377		from: &T::CrossAccountId,1378		recipient: &T::CrossAccountId,1379		collection: &CollectionHandle<T>,1380		item_id: TokenId,1381		amount: u128,1382	) -> DispatchResult {1383		collection.consume_gas(2000000)?;1384		// Check approval1385		let approval: u128 =1386			<Allowances<T>>::get(collection.id, (item_id, from.as_sub(), sender.as_sub()));13871388		// Limits check1389		Self::is_correct_transfer(collection, recipient)?;13901391		// Transfer permissions check1392		ensure!(1393			approval >= amount1394				|| (collection.limits.owner_can_transfer1395					&& Self::is_owner_or_admin_permissions(collection, sender)),1396			Error::<T>::NoPermission1397		);13981399		if collection.access == AccessMode::WhiteList {1400			Self::check_white_list(collection, sender)?;1401			Self::check_white_list(collection, recipient)?;1402		}14031404		// Reduce approval by transferred amount or remove if remaining approval drops to 01405		let allowance = approval.saturating_sub(amount);1406		if allowance > 0 {1407			<Allowances<T>>::insert(1408				collection.id,1409				(item_id, from.as_sub(), sender.as_sub()),1410				allowance,1411			);1412		} else {1413			<Allowances<T>>::remove(collection.id, (item_id, from.as_sub(), sender.as_sub()));1414		}14151416		match collection.mode {1417			CollectionMode::NFT => {1418				Self::transfer_nft(collection, item_id, from.clone(), recipient.clone())?1419			}1420			CollectionMode::Fungible(_) => {1421				Self::transfer_fungible(collection, amount, from, recipient)?1422			}1423			CollectionMode::ReFungible => Self::transfer_refungible(1424				collection,1425				item_id,1426				amount,1427				from.clone(),1428				recipient.clone(),1429			)?,1430			_ => (),1431		};14321433		if matches!(collection.mode, CollectionMode::Fungible(_)) {1434			collection.log(ERC20Events::Approval {1435				owner: *from.as_eth(),1436				spender: *sender.as_eth(),1437				value: allowance.into(),1438			})?;1439		}14401441		Ok(())1442	}14431444	pub fn set_variable_meta_data_internal(1445		sender: &T::CrossAccountId,1446		collection: &CollectionHandle<T>,1447		item_id: TokenId,1448		data: Vec<u8>,1449	) -> DispatchResult {1450		Self::token_exists(collection, item_id)?;14511452		ensure!(1453			CUSTOM_DATA_LIMIT >= data.len() as u32,1454			Error::<T>::TokenVariableDataLimitExceeded1455		);14561457		// Modify permissions check1458		ensure!(1459			Self::is_item_owner(sender, collection, item_id)1460				|| Self::is_owner_or_admin_permissions(collection, sender),1461			Error::<T>::NoPermission1462		);14631464		match collection.mode {1465			CollectionMode::NFT => Self::set_nft_variable_data(collection, item_id, data)?,1466			CollectionMode::ReFungible => {1467				Self::set_re_fungible_variable_data(collection, item_id, data)?1468			}1469			CollectionMode::Fungible(_) => fail!(Error::<T>::CantStoreMetadataInFungibleTokens),1470			_ => fail!(Error::<T>::UnexpectedCollectionType),1471		};14721473		Ok(())1474	}14751476	pub fn create_multiple_items_internal(1477		sender: &T::CrossAccountId,1478		collection: &CollectionHandle<T>,1479		owner: &T::CrossAccountId,1480		items_data: Vec<CreateItemData>,1481	) -> DispatchResult {1482		Self::can_create_items_in_collection(collection, sender, owner, items_data.len() as u32)?;14831484		for data in &items_data {1485			Self::validate_create_item_args(collection, data)?;1486		}1487		for data in &items_data {1488			Self::create_item_no_validation(collection, owner, data.clone())?;1489		}14901491		Ok(())1492	}14931494	pub fn burn_item_internal(1495		sender: &T::CrossAccountId,1496		collection: &CollectionHandle<T>,1497		item_id: TokenId,1498		value: u128,1499	) -> DispatchResult {1500		ensure!(1501			Self::is_item_owner(sender, collection, item_id)1502				|| (collection.limits.owner_can_transfer1503					&& Self::is_owner_or_admin_permissions(collection, sender)),1504			Error::<T>::NoPermission1505		);15061507		if collection.access == AccessMode::WhiteList {1508			Self::check_white_list(collection, sender)?;1509		}15101511		match collection.mode {1512			CollectionMode::NFT => Self::burn_nft_item(collection, item_id)?,1513			CollectionMode::Fungible(_) => Self::burn_fungible_item(sender, collection, value)?,1514			CollectionMode::ReFungible => Self::burn_refungible_item(collection, item_id, sender)?,1515			_ => (),1516		};15171518		Ok(())1519	}15201521	pub fn toggle_white_list_internal(1522		sender: &T::CrossAccountId,1523		collection: &CollectionHandle<T>,1524		address: &T::CrossAccountId,1525		whitelisted: bool,1526	) -> DispatchResult {1527		Self::check_owner_or_admin_permissions(collection, sender)?;15281529		if whitelisted {1530			<WhiteList<T>>::insert(collection.id, address.as_sub(), true);1531		} else {1532			<WhiteList<T>>::remove(collection.id, address.as_sub());1533		}15341535		Ok(())1536	}15371538	fn is_correct_transfer(1539		collection: &CollectionHandle<T>,1540		recipient: &T::CrossAccountId,1541	) -> DispatchResult {1542		let collection_id = collection.id;15431544		// check token limit and account token limit1545		let account_items: u32 =1546			<AddressTokens<T>>::get(collection_id, recipient.as_sub()).len() as u32;1547		ensure!(1548			collection.limits.account_token_ownership_limit > account_items,1549			Error::<T>::AccountTokenLimitExceeded1550		);15511552		// preliminary transfer check1553		ensure!(collection.transfers_enabled, Error::<T>::TransferNotAllowed);15541555		Ok(())1556	}15571558	fn can_create_items_in_collection(1559		collection: &CollectionHandle<T>,1560		sender: &T::CrossAccountId,1561		owner: &T::CrossAccountId,1562		amount: u32,1563	) -> DispatchResult {1564		let collection_id = collection.id;15651566		// check token limit and account token limit1567		let total_items: u32 = ItemListIndex::get(collection_id)1568			.checked_add(amount)1569			.ok_or(Error::<T>::CollectionTokenLimitExceeded)?;1570		let account_items: u32 = (<AddressTokens<T>>::get(collection_id, owner.as_sub()).len()1571			as u32)1572			.checked_add(amount)1573			.ok_or(Error::<T>::AccountTokenLimitExceeded)?;1574		ensure!(1575			collection.limits.token_limit >= total_items,1576			Error::<T>::CollectionTokenLimitExceeded1577		);1578		ensure!(1579			collection.limits.account_token_ownership_limit >= account_items,1580			Error::<T>::AccountTokenLimitExceeded1581		);15821583		if !Self::is_owner_or_admin_permissions(collection, sender) {1584			ensure!(collection.mint_mode, Error::<T>::PublicMintingNotAllowed);1585			Self::check_white_list(collection, owner)?;1586			Self::check_white_list(collection, sender)?;1587		}15881589		Ok(())1590	}15911592	fn validate_create_item_args(1593		target_collection: &CollectionHandle<T>,1594		data: &CreateItemData,1595	) -> DispatchResult {1596		match target_collection.mode {1597			CollectionMode::NFT => {1598				if let CreateItemData::NFT(data) = data {1599					// check sizes1600					ensure!(1601						CUSTOM_DATA_LIMIT >= data.const_data.len() as u32,1602						Error::<T>::TokenConstDataLimitExceeded1603					);1604					ensure!(1605						CUSTOM_DATA_LIMIT >= data.variable_data.len() as u32,1606						Error::<T>::TokenVariableDataLimitExceeded1607					);1608				} else {1609					fail!(Error::<T>::NotNftDataUsedToMintNftCollectionToken);1610				}1611			}1612			CollectionMode::Fungible(_) => {1613				if let CreateItemData::Fungible(_) = data {1614				} else {1615					fail!(Error::<T>::NotFungibleDataUsedToMintFungibleCollectionToken);1616				}1617			}1618			CollectionMode::ReFungible => {1619				if let CreateItemData::ReFungible(data) = data {1620					// check sizes1621					ensure!(1622						CUSTOM_DATA_LIMIT >= data.const_data.len() as u32,1623						Error::<T>::TokenConstDataLimitExceeded1624					);1625					ensure!(1626						CUSTOM_DATA_LIMIT >= data.variable_data.len() as u32,1627						Error::<T>::TokenVariableDataLimitExceeded1628					);16291630					// Check refungibility limits1631					ensure!(1632						data.pieces <= MAX_REFUNGIBLE_PIECES,1633						Error::<T>::WrongRefungiblePieces1634					);1635					ensure!(data.pieces > 0, Error::<T>::WrongRefungiblePieces);1636				} else {1637					fail!(Error::<T>::NotReFungibleDataUsedToMintReFungibleCollectionToken);1638				}1639			}1640			_ => {1641				fail!(Error::<T>::UnexpectedCollectionType);1642			}1643		};16441645		Ok(())1646	}16471648	fn create_item_no_validation(1649		collection: &CollectionHandle<T>,1650		owner: &T::CrossAccountId,1651		data: CreateItemData,1652	) -> DispatchResult {1653		match data {1654			CreateItemData::NFT(data) => {1655				let item = NftItemType {1656					owner: owner.clone(),1657					const_data: data.const_data.into_inner(),1658					variable_data: data.variable_data.into_inner(),1659				};16601661				Self::add_nft_item(collection, item)?;1662			}1663			CreateItemData::Fungible(data) => {1664				Self::add_fungible_item(collection, owner, data.value)?;1665			}1666			CreateItemData::ReFungible(data) => {1667				let owner_list = vec![Ownership {1668					owner: owner.clone(),1669					fraction: data.pieces,1670				}];16711672				let item = ReFungibleItemType {1673					owner: owner_list,1674					const_data: data.const_data.into_inner(),1675					variable_data: data.variable_data.into_inner(),1676				};16771678				Self::add_refungible_item(collection, item)?;1679			}1680		};16811682		Ok(())1683	}16841685	fn add_fungible_item(1686		collection: &CollectionHandle<T>,1687		owner: &T::CrossAccountId,1688		value: u128,1689	) -> DispatchResult {1690		let collection_id = collection.id;16911692		// Does new owner already have an account?1693		let balance: u128 = <FungibleItemList<T>>::get(collection_id, owner.as_sub()).value;16941695		// Mint1696		let item = FungibleItemType {1697			value: balance.checked_add(value).ok_or(Error::<T>::NumOverflow)?,1698		};1699		<FungibleItemList<T>>::insert(collection_id, owner.as_sub(), item);17001701		// Update balance1702		let new_balance = <Balance<T>>::get(collection_id, owner.as_sub())1703			.checked_add(value)1704			.ok_or(Error::<T>::NumOverflow)?;1705		<Balance<T>>::insert(collection_id, owner.as_sub(), new_balance);17061707		Self::deposit_event(RawEvent::ItemCreated(collection_id, 0, owner.clone()));1708		Ok(())1709	}17101711	fn add_refungible_item(1712		collection: &CollectionHandle<T>,1713		item: ReFungibleItemType<T::CrossAccountId>,1714	) -> DispatchResult {1715		let collection_id = collection.id;17161717		let current_index = <ItemListIndex>::get(collection_id)1718			.checked_add(1)1719			.ok_or(Error::<T>::NumOverflow)?;1720		let itemcopy = item.clone();17211722		ensure!(item.owner.len() == 1, Error::<T>::BadCreateRefungibleCall,);1723		let item_owner = item.owner.first().expect("only one owner is defined");17241725		let value = item_owner.fraction;1726		let owner = item_owner.owner.clone();17271728		Self::add_token_index(collection_id, current_index, &owner)?;17291730		<ItemListIndex>::insert(collection_id, current_index);1731		<ReFungibleItemList<T>>::insert(collection_id, current_index, itemcopy);17321733		// Update balance1734		let new_balance = <Balance<T>>::get(collection_id, owner.as_sub())1735			.checked_add(value)1736			.ok_or(Error::<T>::NumOverflow)?;1737		<Balance<T>>::insert(collection_id, owner.as_sub(), new_balance);17381739		Self::deposit_event(RawEvent::ItemCreated(collection_id, current_index, owner));1740		Ok(())1741	}17421743	fn add_nft_item(1744		collection: &CollectionHandle<T>,1745		item: NftItemType<T::CrossAccountId>,1746	) -> DispatchResult {1747		let collection_id = collection.id;17481749		let current_index = <ItemListIndex>::get(collection_id)1750			.checked_add(1)1751			.ok_or(Error::<T>::NumOverflow)?;17521753		let item_owner = item.owner.clone();1754		Self::add_token_index(collection_id, current_index, &item.owner)?;17551756		<ItemListIndex>::insert(collection_id, current_index);1757		<NftItemList<T>>::insert(collection_id, current_index, item);17581759		// Update balance1760		let new_balance = <Balance<T>>::get(collection_id, item_owner.as_sub())1761			.checked_add(1)1762			.ok_or(Error::<T>::NumOverflow)?;1763		<Balance<T>>::insert(collection_id, item_owner.as_sub(), new_balance);17641765		collection.log(ERC721Events::Transfer {1766			from: H160::default(),1767			to: *item_owner.as_eth(),1768			token_id: current_index.into(),1769		})?;1770		Self::deposit_event(RawEvent::ItemCreated(1771			collection_id,1772			current_index,1773			item_owner,1774		));1775		Ok(())1776	}17771778	fn burn_refungible_item(1779		collection: &CollectionHandle<T>,1780		item_id: TokenId,1781		owner: &T::CrossAccountId,1782	) -> DispatchResult {1783		let collection_id = collection.id;17841785		let mut token = <ReFungibleItemList<T>>::get(collection_id, item_id)1786			.ok_or(Error::<T>::TokenNotFound)?;1787		let rft_balance = token1788			.owner1789			.iter()1790			.find(|&i| i.owner == *owner)1791			.ok_or(Error::<T>::TokenNotFound)?;1792		Self::remove_token_index(collection_id, item_id, owner)?;17931794		// update balance1795		let new_balance = <Balance<T>>::get(collection_id, rft_balance.owner.as_sub())1796			.checked_sub(rft_balance.fraction)1797			.ok_or(Error::<T>::NumOverflow)?;1798		<Balance<T>>::insert(collection_id, rft_balance.owner.as_sub(), new_balance);17991800		// Re-create owners list with sender removed1801		let index = token1802			.owner1803			.iter()1804			.position(|i| i.owner == *owner)1805			.expect("owned item is exists");1806		token.owner.remove(index);1807		let owner_count = token.owner.len();18081809		// Burn the token completely if this was the last (only) owner1810		if owner_count == 0 {1811			<ReFungibleItemList<T>>::remove(collection_id, item_id);1812			<VariableMetaDataBasket<T>>::remove(collection_id, item_id);1813		} else {1814			<ReFungibleItemList<T>>::insert(collection_id, item_id, token);1815		}18161817		Ok(())1818	}18191820	fn burn_nft_item(collection: &CollectionHandle<T>, item_id: TokenId) -> DispatchResult {1821		let collection_id = collection.id;18221823		let item =1824			<NftItemList<T>>::get(collection_id, item_id).ok_or(Error::<T>::TokenNotFound)?;1825		Self::remove_token_index(collection_id, item_id, &item.owner)?;18261827		// update balance1828		let new_balance = <Balance<T>>::get(collection_id, item.owner.as_sub())1829			.checked_sub(1)1830			.ok_or(Error::<T>::NumOverflow)?;1831		<Balance<T>>::insert(collection_id, item.owner.as_sub(), new_balance);1832		<NftItemList<T>>::remove(collection_id, item_id);1833		<VariableMetaDataBasket<T>>::remove(collection_id, item_id);18341835		Self::deposit_event(RawEvent::ItemDestroyed(collection.id, item_id));1836		Ok(())1837	}18381839	fn burn_fungible_item(1840		owner: &T::CrossAccountId,1841		collection: &CollectionHandle<T>,1842		value: u128,1843	) -> DispatchResult {1844		let collection_id = collection.id;18451846		let mut balance = <FungibleItemList<T>>::get(collection_id, owner.as_sub());1847		ensure!(balance.value >= value, Error::<T>::TokenValueNotEnough);18481849		// update balance1850		let new_balance = <Balance<T>>::get(collection_id, owner.as_sub())1851			.checked_sub(value)1852			.ok_or(Error::<T>::NumOverflow)?;1853		<Balance<T>>::insert(collection_id, owner.as_sub(), new_balance);18541855		if balance.value - value > 0 {1856			balance.value -= value;1857			<FungibleItemList<T>>::insert(collection_id, owner.as_sub(), balance);1858		} else {1859			<FungibleItemList<T>>::remove(collection_id, owner.as_sub());1860		}18611862		collection.log(ERC20Events::Transfer {1863			from: *owner.as_eth(),1864			to: H160::default(),1865			value: value.into(),1866		})?;1867		Ok(())1868	}18691870	pub fn get_collection(1871		collection_id: CollectionId,1872	) -> Result<CollectionHandle<T>, sp_runtime::DispatchError> {1873		Ok(<CollectionHandle<T>>::get(collection_id).ok_or(Error::<T>::CollectionNotFound)?)1874	}18751876	fn check_owner_permissions(1877		target_collection: &CollectionHandle<T>,1878		subject: &T::AccountId,1879	) -> DispatchResult {1880		ensure!(1881			*subject == target_collection.owner,1882			Error::<T>::NoPermission1883		);18841885		Ok(())1886	}18871888	fn is_owner_or_admin_permissions(1889		collection: &CollectionHandle<T>,1890		subject: &T::CrossAccountId,1891	) -> bool {1892		*subject.as_sub() == collection.owner1893			|| <AdminList<T>>::get(collection.id).contains(subject)1894	}18951896	fn check_owner_or_admin_permissions(1897		collection: &CollectionHandle<T>,1898		subject: &T::CrossAccountId,1899	) -> DispatchResult {1900		ensure!(1901			Self::is_owner_or_admin_permissions(collection, subject),1902			Error::<T>::NoPermission1903		);19041905		Ok(())1906	}19071908	fn owned_amount(1909		subject: &T::CrossAccountId,1910		target_collection: &CollectionHandle<T>,1911		item_id: TokenId,1912	) -> Option<u128> {1913		let collection_id = target_collection.id;19141915		match target_collection.mode {1916			CollectionMode::NFT => {1917				(<NftItemList<T>>::get(collection_id, item_id)?.owner == *subject).then(|| 1)1918			}1919			CollectionMode::Fungible(_) => {1920				Some(<FungibleItemList<T>>::get(collection_id, &subject.as_sub()).value)1921			}1922			CollectionMode::ReFungible => <ReFungibleItemList<T>>::get(collection_id, item_id)?1923				.owner1924				.iter()1925				.find(|i| i.owner == *subject)1926				.map(|i| i.fraction),1927			CollectionMode::Invalid => None,1928		}1929	}19301931	fn is_item_owner(1932		subject: &T::CrossAccountId,1933		target_collection: &CollectionHandle<T>,1934		item_id: TokenId,1935	) -> bool {1936		match target_collection.mode {1937			CollectionMode::Fungible(_) => true,1938			_ => Self::owned_amount(subject, target_collection, item_id).is_some(),1939		}1940	}19411942	fn check_white_list(1943		collection: &CollectionHandle<T>,1944		address: &T::CrossAccountId,1945	) -> DispatchResult {1946		let collection_id = collection.id;19471948		let mes = Error::<T>::AddresNotInWhiteList;1949		ensure!(1950			<WhiteList<T>>::contains_key(collection_id, address.as_sub()),1951			mes1952		);19531954		Ok(())1955	}19561957	/// Check if token exists. In case of Fungible, check if there is an entry for1958	/// the owner in fungible balances double map1959	fn token_exists(target_collection: &CollectionHandle<T>, item_id: TokenId) -> DispatchResult {1960		let collection_id = target_collection.id;1961		let exists = match target_collection.mode {1962			CollectionMode::NFT => <NftItemList<T>>::contains_key(collection_id, item_id),1963			CollectionMode::Fungible(_) => true,1964			CollectionMode::ReFungible => {1965				<ReFungibleItemList<T>>::contains_key(collection_id, item_id)1966			}1967			_ => false,1968		};19691970		ensure!(exists, Error::<T>::TokenNotFound);1971		Ok(())1972	}19731974	fn transfer_fungible(1975		collection: &CollectionHandle<T>,1976		value: u128,1977		owner: &T::CrossAccountId,1978		recipient: &T::CrossAccountId,1979	) -> DispatchResult {1980		let collection_id = collection.id;19811982		let mut balance = <FungibleItemList<T>>::get(collection_id, owner.as_sub());1983		ensure!(balance.value >= value, Error::<T>::TokenValueTooLow);19841985		// Send balance to recipient (updates balanceOf of recipient)1986		Self::add_fungible_item(collection, recipient, value)?;19871988		// update balanceOf of sender1989		<Balance<T>>::insert(collection_id, owner.as_sub(), balance.value - value);19901991		// Reduce or remove sender1992		if balance.value == value {1993			<FungibleItemList<T>>::remove(collection_id, owner.as_sub());1994		} else {1995			balance.value -= value;1996			<FungibleItemList<T>>::insert(collection_id, owner.as_sub(), balance);1997		}19981999		collection.log(ERC20Events::Transfer {2000			from: *owner.as_eth(),2001			to: *recipient.as_eth(),2002			value: value.into(),2003		})?;2004		Self::deposit_event(RawEvent::Transfer(2005			collection.id,2006			1,2007			owner.clone(),2008			recipient.clone(),2009			value,2010		));20112012		Ok(())2013	}20142015	fn transfer_refungible(2016		collection: &CollectionHandle<T>,2017		item_id: TokenId,2018		value: u128,2019		owner: T::CrossAccountId,2020		new_owner: T::CrossAccountId,2021	) -> DispatchResult {2022		let collection_id = collection.id;2023		let full_item = <ReFungibleItemList<T>>::get(collection_id, item_id)2024			.ok_or(Error::<T>::TokenNotFound)?;20252026		let item = full_item2027			.owner2028			.iter()2029			.find(|i| i.owner == owner)2030			.ok_or(Error::<T>::TokenNotFound)?;2031		let amount = item.fraction;20322033		ensure!(amount >= value, Error::<T>::TokenValueTooLow);20342035		// update balance2036		let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.as_sub())2037			.checked_sub(value)2038			.ok_or(Error::<T>::NumOverflow)?;2039		<Balance<T>>::insert(collection_id, item.owner.as_sub(), balance_old_owner);20402041		let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.as_sub())2042			.checked_add(value)2043			.ok_or(Error::<T>::NumOverflow)?;2044		<Balance<T>>::insert(collection_id, new_owner.as_sub(), balance_new_owner);20452046		let old_owner = item.owner.clone();2047		let new_owner_has_account = full_item.owner.iter().any(|i| i.owner == new_owner);20482049		let mut new_full_item = full_item.clone();2050		// transfer2051		if amount == value && !new_owner_has_account {2052			// change owner2053			// new owner do not have account2054			new_full_item2055				.owner2056				.iter_mut()2057				.find(|i| i.owner == owner)2058				.expect("old owner does present in refungible")2059				.owner = new_owner.clone();2060			<ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);20612062			// update index collection2063			Self::move_token_index(collection_id, item_id, &old_owner, &new_owner)?;2064		} else {2065			new_full_item2066				.owner2067				.iter_mut()2068				.find(|i| i.owner == owner)2069				.expect("old owner does present in refungible")2070				.fraction -= value;20712072			// separate amount2073			if new_owner_has_account {2074				// new owner has account2075				new_full_item2076					.owner2077					.iter_mut()2078					.find(|i| i.owner == new_owner)2079					.expect("new owner has account")2080					.fraction += value;2081			} else {2082				// new owner do not have account2083				new_full_item.owner.push(Ownership {2084					owner: new_owner.clone(),2085					fraction: value,2086				});2087				Self::add_token_index(collection_id, item_id, &new_owner)?;2088			}20892090			<ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);2091		}20922093		Self::deposit_event(RawEvent::Transfer(2094			collection.id,2095			item_id,2096			owner,2097			new_owner,2098			amount,2099		));21002101		Ok(())2102	}21032104	fn transfer_nft(2105		collection: &CollectionHandle<T>,2106		item_id: TokenId,2107		sender: T::CrossAccountId,2108		new_owner: T::CrossAccountId,2109	) -> DispatchResult {2110		let collection_id = collection.id;2111		let mut item =2112			<NftItemList<T>>::get(collection_id, item_id).ok_or(Error::<T>::TokenNotFound)?;21132114		ensure!(sender == item.owner, Error::<T>::MustBeTokenOwner);21152116		// update balance2117		let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.as_sub())2118			.checked_sub(1)2119			.ok_or(Error::<T>::NumOverflow)?;2120		<Balance<T>>::insert(collection_id, item.owner.as_sub(), balance_old_owner);21212122		let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.as_sub())2123			.checked_add(1)2124			.ok_or(Error::<T>::NumOverflow)?;2125		<Balance<T>>::insert(collection_id, new_owner.as_sub(), balance_new_owner);21262127		// change owner2128		let old_owner = item.owner.clone();2129		item.owner = new_owner.clone();2130		<NftItemList<T>>::insert(collection_id, item_id, item);21312132		// update index collection2133		Self::move_token_index(collection_id, item_id, &old_owner, &new_owner)?;21342135		collection.log(ERC721Events::Transfer {2136			from: *sender.as_eth(),2137			to: *new_owner.as_eth(),2138			token_id: item_id.into(),2139		})?;2140		Self::deposit_event(RawEvent::Transfer(2141			collection.id,2142			item_id,2143			sender,2144			new_owner,2145			1,2146		));21472148		Ok(())2149	}21502151	fn set_re_fungible_variable_data(2152		collection: &CollectionHandle<T>,2153		item_id: TokenId,2154		data: Vec<u8>,2155	) -> DispatchResult {2156		let collection_id = collection.id;2157		let mut item = <ReFungibleItemList<T>>::get(collection_id, item_id)2158			.ok_or(Error::<T>::TokenNotFound)?;21592160		item.variable_data = data;21612162		<ReFungibleItemList<T>>::insert(collection_id, item_id, item);21632164		Ok(())2165	}21662167	fn set_nft_variable_data(2168		collection: &CollectionHandle<T>,2169		item_id: TokenId,2170		data: Vec<u8>,2171	) -> DispatchResult {2172		let collection_id = collection.id;2173		let mut item =2174			<NftItemList<T>>::get(collection_id, item_id).ok_or(Error::<T>::TokenNotFound)?;21752176		item.variable_data = data;21772178		<NftItemList<T>>::insert(collection_id, item_id, item);21792180		Ok(())2181	}21822183	#[allow(dead_code)]2184	fn init_collection(item: &Collection<T>) {2185		// check params2186		assert!(2187			item.decimal_points <= MAX_DECIMAL_POINTS,2188			"decimal_points parameter must be lower than MAX_DECIMAL_POINTS"2189		);2190		assert!(2191			item.name.len() <= 64,2192			"Collection name can not be longer than 63 char"2193		);2194		assert!(2195			item.name.len() <= 256,2196			"Collection description can not be longer than 255 char"2197		);2198		assert!(2199			item.token_prefix.len() <= 16,2200			"Token prefix can not be longer than 15 char"2201		);22022203		// Generate next collection ID2204		let next_id = CreatedCollectionCount::get().checked_add(1).unwrap();22052206		CreatedCollectionCount::put(next_id);2207	}22082209	#[allow(dead_code)]2210	fn init_nft_token(collection_id: CollectionId, item: &NftItemType<T::CrossAccountId>) {2211		let current_index = <ItemListIndex>::get(collection_id).checked_add(1).unwrap();22122213		Self::add_token_index(collection_id, current_index, &item.owner).unwrap();22142215		<ItemListIndex>::insert(collection_id, current_index);22162217		// Update balance2218		let new_balance = <Balance<T>>::get(collection_id, item.owner.as_sub())2219			.checked_add(1)2220			.unwrap();2221		<Balance<T>>::insert(collection_id, item.owner.as_sub(), new_balance);2222	}22232224	#[allow(dead_code)]2225	fn init_fungible_token(2226		collection_id: CollectionId,2227		owner: &T::CrossAccountId,2228		item: &FungibleItemType,2229	) {2230		let current_index = <ItemListIndex>::get(collection_id).checked_add(1).unwrap();22312232		Self::add_token_index(collection_id, current_index, owner).unwrap();22332234		<ItemListIndex>::insert(collection_id, current_index);22352236		// Update balance2237		let new_balance = <Balance<T>>::get(collection_id, owner.as_sub())2238			.checked_add(item.value)2239			.unwrap();2240		<Balance<T>>::insert(collection_id, owner.as_sub(), new_balance);2241	}22422243	#[allow(dead_code)]2244	fn init_refungible_token(2245		collection_id: CollectionId,2246		item: &ReFungibleItemType<T::CrossAccountId>,2247	) {2248		let current_index = <ItemListIndex>::get(collection_id).checked_add(1).unwrap();22492250		let value = item.owner.first().unwrap().fraction;2251		let owner = item.owner.first().unwrap().owner.clone();22522253		Self::add_token_index(collection_id, current_index, &owner).unwrap();22542255		<ItemListIndex>::insert(collection_id, current_index);22562257		// Update balance2258		let new_balance = <Balance<T>>::get(collection_id, &owner.as_sub())2259			.checked_add(value)2260			.unwrap();2261		<Balance<T>>::insert(collection_id, owner.as_sub(), new_balance);2262	}22632264	fn add_token_index(2265		collection_id: CollectionId,2266		item_index: TokenId,2267		owner: &T::CrossAccountId,2268	) -> DispatchResult {2269		// add to account limit2270		if <AccountItemCount<T>>::contains_key(owner.as_sub()) {2271			// bound Owned tokens by a single address2272			let count = <AccountItemCount<T>>::get(owner.as_sub());2273			ensure!(2274				count < ACCOUNT_TOKEN_OWNERSHIP_LIMIT,2275				Error::<T>::AddressOwnershipLimitExceeded2276			);22772278			<AccountItemCount<T>>::insert(2279				owner.as_sub(),2280				count.checked_add(1).ok_or(Error::<T>::NumOverflow)?,2281			);2282		} else {2283			<AccountItemCount<T>>::insert(owner.as_sub(), 1);2284		}22852286		let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner.as_sub());2287		if list_exists {2288			let mut list = <AddressTokens<T>>::get(collection_id, owner.as_sub());2289			let item_contains = list.contains(&item_index.clone());22902291			if !item_contains {2292				list.push(item_index);2293			}22942295			<AddressTokens<T>>::insert(collection_id, owner.as_sub(), list);2296		} else {2297			let itm = vec![item_index];2298			<AddressTokens<T>>::insert(collection_id, owner.as_sub(), itm);2299		}23002301		Ok(())2302	}23032304	fn remove_token_index(2305		collection_id: CollectionId,2306		item_index: TokenId,2307		owner: &T::CrossAccountId,2308	) -> DispatchResult {2309		// update counter2310		<AccountItemCount<T>>::insert(2311			owner.as_sub(),2312			<AccountItemCount<T>>::get(owner.as_sub())2313				.checked_sub(1)2314				.ok_or(Error::<T>::NumOverflow)?,2315		);23162317		let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner.as_sub());2318		if list_exists {2319			let mut list = <AddressTokens<T>>::get(collection_id, owner.as_sub());2320			let item_contains = list.contains(&item_index.clone());23212322			if item_contains {2323				list.retain(|&item| item != item_index);2324				<AddressTokens<T>>::insert(collection_id, owner.as_sub(), list);2325			}2326		}23272328		Ok(())2329	}23302331	fn move_token_index(2332		collection_id: CollectionId,2333		item_index: TokenId,2334		old_owner: &T::CrossAccountId,2335		new_owner: &T::CrossAccountId,2336	) -> DispatchResult {2337		Self::remove_token_index(collection_id, item_index, old_owner)?;2338		Self::add_token_index(collection_id, item_index, new_owner)?;23392340		Ok(())2341	}2342}23432344sp_api::decl_runtime_apis! {2345	pub trait NftApi {2346		/// Used for ethereum integration2347		fn eth_contract_code(account: H160) -> Option<Vec<u8>>;2348	}2349}