git.delta.rocks / unique-network / refs/commits / 515da444e614

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, ensure_root};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	AccessMode, ChainLimits, Collection, CreateItemData, CollectionLimits, CollectionId,42	CollectionMode, TokenId, SchemaVersion, SponsorshipState, Ownership, NftItemType,43	FungibleItemType, ReFungibleItemType,44};4546#[cfg(test)]47mod mock;4849#[cfg(test)]50mod tests;5152mod default_weights;53mod eth;54mod sponsorship;55pub use sponsorship::NftSponsorshipHandler;56pub use eth::sponsoring::NftEthSponsorshipHandler;5758pub use eth::NftErcSupport;59pub use eth::account::*;60use eth::erc::{ERC20Events, ERC721Events};6162#[cfg(feature = "runtime-benchmarks")]63mod benchmarking;6465pub trait WeightInfo {66	fn create_collection() -> Weight;67	fn destroy_collection() -> Weight;68	fn add_to_white_list() -> Weight;69	fn remove_from_white_list() -> Weight;70	fn set_public_access_mode() -> Weight;71	fn set_mint_permission() -> Weight;72	fn change_collection_owner() -> Weight;73	fn add_collection_admin() -> Weight;74	fn remove_collection_admin() -> Weight;75	fn set_collection_sponsor() -> Weight;76	fn confirm_sponsorship() -> Weight;77	fn remove_collection_sponsor() -> Weight;78	fn create_item(s: usize) -> Weight;79	fn burn_item() -> Weight;80	fn transfer() -> Weight;81	fn approve() -> Weight;82	fn transfer_from() -> Weight;83	fn set_offchain_schema() -> Weight;84	fn set_const_on_chain_schema() -> Weight;85	fn set_variable_on_chain_schema() -> Weight;86	fn set_variable_meta_data() -> Weight;87	fn enable_contract_sponsoring() -> Weight;88	fn set_schema_version() -> Weight;89	fn set_chain_limits() -> Weight;90	fn set_contract_sponsoring_rate_limit() -> Weight;91	fn set_variable_meta_data_sponsoring_rate_limit() -> Weight;92	fn toggle_contract_white_list() -> Weight;93	fn add_to_contract_white_list() -> Weight;94	fn remove_from_contract_white_list() -> Weight;95	fn set_collection_limits() -> Weight;96}9798decl_error! {99	/// Error for non-fungible-token module.100	pub enum Error for Module<T: Config> {101		/// Total collections bound exceeded.102		TotalCollectionsLimitExceeded,103		/// Decimal_points parameter must be lower than MAX_DECIMAL_POINTS constant, currently it is 30.104		CollectionDecimalPointLimitExceeded,105		/// Collection name can not be longer than 63 char.106		CollectionNameLimitExceeded,107		/// Collection description can not be longer than 255 char.108		CollectionDescriptionLimitExceeded,109		/// Token prefix can not be longer than 15 char.110		CollectionTokenPrefixLimitExceeded,111		/// This collection does not exist.112		CollectionNotFound,113		/// Item not exists.114		TokenNotFound,115		/// Admin not found116		AdminNotFound,117		/// Arithmetic calculation overflow.118		NumOverflow,119		/// Account already has admin role.120		AlreadyAdmin,121		/// You do not own this collection.122		NoPermission,123		/// This address is not set as sponsor, use setCollectionSponsor first.124		ConfirmUnsetSponsorFail,125		/// Collection is not in mint mode.126		PublicMintingNotAllowed,127		/// Sender parameter and item owner must be equal.128		MustBeTokenOwner,129		/// Item balance not enough.130		TokenValueTooLow,131		/// Size of item is too large.132		NftSizeLimitExceeded,133		/// No approve found134		ApproveNotFound,135		/// Requested value more than approved.136		TokenValueNotEnough,137		/// Only approved addresses can call this method.138		ApproveRequired,139		/// Address is not in white list.140		AddresNotInWhiteList,141		/// Number of collection admins bound exceeded.142		CollectionAdminsLimitExceeded,143		/// Owned tokens by a single address bound exceeded.144		AddressOwnershipLimitExceeded,145		/// Length of items properties must be greater than 0.146		EmptyArgument,147		/// const_data exceeded data limit.148		TokenConstDataLimitExceeded,149		/// variable_data exceeded data limit.150		TokenVariableDataLimitExceeded,151		/// Not NFT item data used to mint in NFT collection.152		NotNftDataUsedToMintNftCollectionToken,153		/// Not Fungible item data used to mint in Fungible collection.154		NotFungibleDataUsedToMintFungibleCollectionToken,155		/// Not Re Fungible item data used to mint in Re Fungible collection.156		NotReFungibleDataUsedToMintReFungibleCollectionToken,157		/// Unexpected collection type.158		UnexpectedCollectionType,159		/// Can't store metadata in fungible tokens.160		CantStoreMetadataInFungibleTokens,161		/// Collection token limit exceeded162		CollectionTokenLimitExceeded,163		/// Account token limit exceeded per collection164		AccountTokenLimitExceeded,165		/// Collection limit bounds per collection exceeded166		CollectionLimitBoundsExceeded,167		/// Tried to enable permissions which are only permitted to be disabled168		OwnerPermissionsCantBeReverted,169		/// Schema data size limit bound exceeded170		SchemaDataLimitExceeded,171		/// Maximum refungibility exceeded172		WrongRefungiblePieces,173		/// createRefungible should be called with one owner174		BadCreateRefungibleCall,175		/// Gas limit exceeded176		OutOfGas,177		/// Collection settings not allowing items transferring178		TransferNotAllowed,179	}180}181182#[must_use = "Should call submit_logs or save, otherwise some data will be lost for evm side"]183pub struct CollectionHandle<T: Config> {184	pub id: CollectionId,185	collection: Collection<T>,186	recorder: pallet_evm_coder_substrate::SubstrateRecorder<T>,187}188impl<T: Config> CollectionHandle<T> {189	pub fn get_with_gas_limit(id: CollectionId, gas_limit: u64) -> Option<Self> {190		<CollectionById<T>>::get(id).map(|collection| Self {191			id,192			collection,193			recorder: pallet_evm_coder_substrate::SubstrateRecorder::new(194				eth::collection_id_to_address(id),195				gas_limit,196			),197		})198	}199	pub fn get(id: CollectionId) -> Option<Self> {200		Self::get_with_gas_limit(id, u64::MAX)201	}202	pub fn log(&self, log: impl evm_coder::ToLog) -> DispatchResult {203		self.recorder.log_sub(log)204	}205	fn consume_gas(&self, gas: u64) -> DispatchResult {206		self.recorder.consume_gas_sub(gas)207	}208	pub fn submit_logs(self) -> DispatchResult {209		self.recorder.submit_logs()210	}211	pub fn save(self) -> DispatchResult {212		self.recorder.submit_logs()?;213		<CollectionById<T>>::insert(self.id, self.collection);214		Ok(())215	}216}217impl<T: Config> Deref for CollectionHandle<T> {218	type Target = Collection<T>;219220	fn deref(&self) -> &Self::Target {221		&self.collection222	}223}224225impl<T: Config> DerefMut for CollectionHandle<T> {226	fn deref_mut(&mut self) -> &mut Self::Target {227		&mut self.collection228	}229}230231pub trait Config: system::Config + pallet_evm_coder_substrate::Config + Sized {232	type Event: From<Event<Self>> + Into<<Self as system::Config>::Event>;233234	/// Weight information for extrinsics in this pallet.235	type WeightInfo: WeightInfo;236237	type EvmAddressMapping: pallet_evm::AddressMapping<Self::AccountId>;238	type EvmBackwardsAddressMapping: EvmBackwardsAddressMapping<Self::AccountId>;239240	type CrossAccountId: CrossAccountId<Self::AccountId>;241	type Currency: Currency<Self::AccountId>;242	type CollectionCreationPrice: Get<243		<<Self as Config>::Currency as Currency<Self::AccountId>>::Balance,244	>;245	type TreasuryAccountId: Get<Self::AccountId>;246}247248// # Used definitions249//250// ## User control levels251//252// chain-controlled - key is uncontrolled by user253//                    i.e autoincrementing index254//                    can use non-cryptographic hash255// real - key is controlled by user256//        but it is hard to generate enough colliding values, i.e owner of signed txs257//        can use non-cryptographic hash258// controlled - key is completly controlled by users259//              i.e maps with mutable keys260//              should use cryptographic hash261//262// ## User control level downgrade reasons263//264// ?1 - chain-controlled -> controlled265//      collections/tokens can be destroyed, resulting in massive holes266// ?2 - chain-controlled -> controlled267//      same as ?1, but can be only added, resulting in easier exploitation268// ?3 - real -> controlled269//      no confirmation required, so addresses can be easily generated270decl_storage! {271	trait Store for Module<T: Config> as Nft {272273		//#region Private members274		/// Id of next collection275		CreatedCollectionCount: u32;276		/// Used for migrations277		ChainVersion: u64;278		/// Id of last collection token279		/// Collection id (controlled?1)280		ItemListIndex: map hasher(blake2_128_concat) CollectionId => TokenId;281		//#endregion282283		//#region Chain limits struct284		pub ChainLimit get(fn chain_limit) config(): ChainLimits;285		//#endregion286287		//#region Bound counters288		/// Amount of collections destroyed, used for total amount tracking with289		/// CreatedCollectionCount290		DestroyedCollectionCount: u32;291		/// Total amount of account owned tokens (NFTs + RFTs + unique fungibles)292		/// Account id (real)293		pub AccountItemCount get(fn account_item_count): map hasher(twox_64_concat) T::AccountId => u32;294		//#endregion295296		//#region Basic collections297		/// Collection info298		/// Collection id (controlled?1)299		pub CollectionById get(fn collection_id) config(): map hasher(blake2_128_concat) CollectionId => Option<Collection<T>> = None;300		/// List of collection admins301		/// Collection id (controlled?2)302		pub AdminList get(fn admin_list_collection): map hasher(blake2_128_concat) CollectionId => Vec<T::CrossAccountId>;303		/// Whitelisted collection users304		/// Collection id (controlled?2), user id (controlled?3)305		pub WhiteList get(fn white_list): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) T::AccountId => bool;306		//#endregion307308		/// How many of collection items user have309		/// Collection id (controlled?2), account id (real)310		pub Balance get(fn balance_count): double_map hasher(blake2_128_concat) CollectionId, hasher(twox_64_concat) T::AccountId => u128;311312		/// Amount of items which spender can transfer out of owners account (via transferFrom)313		/// Collection id (controlled?2), (token id (controlled ?2) + owner account id (real) + spender account id (controlled?3))314		/// TODO: Off chain worker should remove from this map when token gets removed315		pub Allowances get(fn approved): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) (TokenId, T::AccountId, T::AccountId) => u128;316317		//#region Item collections318		/// Collection id (controlled?2), token id (controlled?1)319		pub NftItemList get(fn nft_item_id) config(): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => Option<NftItemType<T::CrossAccountId>>;320		/// Collection id (controlled?2), owner (controlled?2)321		pub FungibleItemList get(fn fungible_item_id) config(): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) T::AccountId => FungibleItemType;322		/// Collection id (controlled?2), token id (controlled?1)323		pub ReFungibleItemList get(fn refungible_item_id) config(): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => Option<ReFungibleItemType<T::CrossAccountId>>;324		//#endregion325326		//#region Index list327		/// Collection id (controlled?2), tokens owner (controlled?2)328		pub AddressTokens get(fn address_tokens): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) T::AccountId => Vec<TokenId>;329		//#endregion330331		//#region Tokens transfer rate limit baskets332		/// (Collection id (controlled?2), who created (real))333		/// TODO: Off chain worker should remove from this map when collection gets removed334		pub CreateItemBasket get(fn create_item_basket): map hasher(blake2_128_concat) (CollectionId, T::AccountId) => T::BlockNumber;335		/// Collection id (controlled?2), token id (controlled?2)336		pub NftTransferBasket get(fn nft_transfer_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => T::BlockNumber;337		/// Collection id (controlled?2), owning user (real)338		pub FungibleTransferBasket get(fn fungible_transfer_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(twox_64_concat) T::AccountId => T::BlockNumber;339		/// Collection id (controlled?2), token id (controlled?2)340		pub ReFungibleTransferBasket get(fn refungible_transfer_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => T::BlockNumber;341		//#endregion342343		/// Variable metadata sponsoring344		/// Collection id (controlled?2), token id (controlled?2)345		pub VariableMetaDataBasket get(fn variable_meta_data_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => Option<T::BlockNumber> = None;346	}347	add_extra_genesis {348		build(|config: &GenesisConfig<T>| {349			// Modification of storage350			for (_num, _c) in &config.collection_id {351				<Module<T>>::init_collection(_c);352			}353354			for (_num, _c, _i) in &config.nft_item_id {355				<Module<T>>::init_nft_token(*_c, _i);356			}357358			for (collection_id, account_id, fungible_item) in &config.fungible_item_id {359				<Module<T>>::init_fungible_token(*collection_id, &T::CrossAccountId::from_sub(account_id.clone()), fungible_item);360			}361362			for (_num, _c, _i) in &config.refungible_item_id {363				<Module<T>>::init_refungible_token(*_c, _i);364			}365		})366	}367}368369decl_event!(370	pub enum Event<T>371	where372		AccountId = <T as frame_system::Config>::AccountId,373		CrossAccountId = <T as Config>::CrossAccountId,374	{375		/// New collection was created376		///377		/// # Arguments378		///379		/// * collection_id: Globally unique identifier of newly created collection.380		///381		/// * mode: [CollectionMode] converted into u8.382		///383		/// * account_id: Collection owner.384		CollectionCreated(CollectionId, u8, AccountId),385386		/// New item was created.387		///388		/// # Arguments389		///390		/// * collection_id: Id of the collection where item was created.391		///392		/// * item_id: Id of an item. Unique within the collection.393		///394		/// * recipient: Owner of newly created item395		ItemCreated(CollectionId, TokenId, CrossAccountId),396397		/// Collection item was burned.398		///399		/// # Arguments400		///401		/// collection_id.402		///403		/// item_id: Identifier of burned NFT.404		ItemDestroyed(CollectionId, TokenId),405406		/// Item was transferred407		///408		/// * collection_id: Id of collection to which item is belong409		///410		/// * item_id: Id of an item411		///412		/// * sender: Original owner of item413		///414		/// * recipient: New owner of item415		///416		/// * amount: Always 1 for NFT417		Transfer(CollectionId, TokenId, CrossAccountId, CrossAccountId, u128),418419		/// * collection_id420		///421		/// * item_id422		///423		/// * sender424		///425		/// * spender426		///427		/// * amount428		Approved(CollectionId, TokenId, CrossAccountId, CrossAccountId, u128),429	}430);431432decl_module! {433	pub struct Module<T: Config> for enum Call434	where435		origin: T::Origin436	{437		fn deposit_event() = default;438		type Error = Error<T>;439440		fn on_initialize(_now: T::BlockNumber) -> Weight {441			0442		}443444		/// 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.445		///446		/// # Permissions447		///448		/// * Anyone.449		///450		/// # Arguments451		///452		/// * collection_name: UTF-16 string with collection name (limit 64 characters), will be stored as zero-terminated.453		///454		/// * collection_description: UTF-16 string with collection description (limit 256 characters), will be stored as zero-terminated.455		///456		/// * token_prefix: UTF-8 string with token prefix.457		///458		/// * mode: [CollectionMode] collection type and type dependent data.459		// returns collection ID460		#[weight = <T as Config>::WeightInfo::create_collection()]461		#[transactional]462		pub fn create_collection(origin,463								 collection_name: Vec<u16>,464								 collection_description: Vec<u16>,465								 token_prefix: Vec<u8>,466								 mode: CollectionMode) -> DispatchResult {467468			// Anyone can create a collection469			let who = ensure_signed(origin)?;470471			// Take a (non-refundable) deposit of collection creation472			let mut imbalance = <<<T as Config>::Currency as Currency<T::AccountId>>::PositiveImbalance>::zero();473			imbalance.subsume(<<T as Config>::Currency as Currency<T::AccountId>>::deposit_creating(474				&T::TreasuryAccountId::get(),475				T::CollectionCreationPrice::get(),476			));477			<T as Config>::Currency::settle(478				&who,479				imbalance,480				WithdrawReasons::TRANSFER,481				ExistenceRequirement::KeepAlive,482			).map_err(|_| Error::<T>::NoPermission)?;483484			let decimal_points = match mode {485				CollectionMode::Fungible(points) => points,486				_ => 0487			};488489			let chain_limit = ChainLimit::get();490491			let created_count = CreatedCollectionCount::get();492			let destroyed_count = DestroyedCollectionCount::get();493494			// bound Total number of collections495			ensure!(created_count - destroyed_count < chain_limit.collection_numbers_limit, Error::<T>::TotalCollectionsLimitExceeded);496497			// check params498			ensure!(decimal_points <= MAX_DECIMAL_POINTS, Error::<T>::CollectionDecimalPointLimitExceeded);499			ensure!(collection_name.len() <= 64, Error::<T>::CollectionNameLimitExceeded);500			ensure!(collection_description.len() <= 256, Error::<T>::CollectionDescriptionLimitExceeded);501			ensure!(token_prefix.len() <= 16, Error::<T>::CollectionTokenPrefixLimitExceeded);502503			// Generate next collection ID504			let next_id = created_count505				.checked_add(1)506				.ok_or(Error::<T>::NumOverflow)?;507508			CreatedCollectionCount::put(next_id);509510			let limits = CollectionLimits {511				sponsored_data_size: chain_limit.custom_data_limit,512				..Default::default()513			};514515			// Create new collection516			let new_collection = Collection {517				owner: who.clone(),518				name: collection_name,519				mode: mode.clone(),520				mint_mode: false,521				access: AccessMode::Normal,522				description: collection_description,523				decimal_points,524				token_prefix,525				offchain_schema: Vec::new(),526				schema_version: SchemaVersion::ImageURL,527				sponsorship: SponsorshipState::Disabled,528				variable_on_chain_schema: Vec::new(),529				const_on_chain_schema: Vec::new(),530				limits,531				transfers_enabled: true,532			};533534			// Add new collection to map535			<CollectionById<T>>::insert(next_id, new_collection);536537			// call event538			Self::deposit_event(RawEvent::CollectionCreated(next_id, mode.id(), who));539540			Ok(())541		}542543		/// **DANGEROUS**: Destroys collection and all NFTs within this collection. Users irrecoverably lose their assets and may lose real money.544		///545		/// # Permissions546		///547		/// * Collection Owner.548		///549		/// # Arguments550		///551		/// * collection_id: collection to destroy.552		#[weight = <T as Config>::WeightInfo::destroy_collection()]553		#[transactional]554		pub fn destroy_collection(origin, collection_id: CollectionId) -> DispatchResult {555556			let sender = ensure_signed(origin)?;557			let collection = Self::get_collection(collection_id)?;558			Self::check_owner_permissions(&collection, &sender)?;559			if !collection.limits.owner_can_destroy {560				fail!(Error::<T>::NoPermission);561			}562563			<AddressTokens<T>>::remove_prefix(collection_id, None);564			<Allowances<T>>::remove_prefix(collection_id, None);565			<Balance<T>>::remove_prefix(collection_id, None);566			<ItemListIndex>::remove(collection_id);567			<AdminList<T>>::remove(collection_id);568			<CollectionById<T>>::remove(collection_id);569			<WhiteList<T>>::remove_prefix(collection_id, None);570571			<NftItemList<T>>::remove_prefix(collection_id, None);572			<FungibleItemList<T>>::remove_prefix(collection_id, None);573			<ReFungibleItemList<T>>::remove_prefix(collection_id, None);574575			<NftTransferBasket<T>>::remove_prefix(collection_id, None);576			<FungibleTransferBasket<T>>::remove_prefix(collection_id, None);577			<ReFungibleTransferBasket<T>>::remove_prefix(collection_id, None);578579			<VariableMetaDataBasket<T>>::remove_prefix(collection_id, None);580581			DestroyedCollectionCount::put(DestroyedCollectionCount::get()582				.checked_add(1)583				.ok_or(Error::<T>::NumOverflow)?);584585			Ok(())586		}587588		/// Add an address to white list.589		///590		/// # Permissions591		///592		/// * Collection Owner593		/// * Collection Admin594		///595		/// # Arguments596		///597		/// * collection_id.598		///599		/// * address.600		#[weight = <T as Config>::WeightInfo::add_to_white_list()]601		#[transactional]602		pub fn add_to_white_list(origin, collection_id: CollectionId, address: T::CrossAccountId) -> DispatchResult{603604			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);605			let collection = Self::get_collection(collection_id)?;606607			Self::toggle_white_list_internal(608				&sender,609				&collection,610				&address,611				true,612			)?;613614			Ok(())615		}616617		/// Remove an address from white list.618		///619		/// # Permissions620		///621		/// * Collection Owner622		/// * Collection Admin623		///624		/// # Arguments625		///626		/// * collection_id.627		///628		/// * address.629		#[weight = <T as Config>::WeightInfo::remove_from_white_list()]630		#[transactional]631		pub fn remove_from_white_list(origin, collection_id: CollectionId, address: T::CrossAccountId) -> DispatchResult{632633			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);634			let collection = Self::get_collection(collection_id)?;635636			Self::toggle_white_list_internal(637				&sender,638				&collection,639				&address,640				false,641			)?;642643			Ok(())644		}645646		/// Toggle between normal and white list access for the methods with access for `Anyone`.647		///648		/// # Permissions649		///650		/// * Collection Owner.651		///652		/// # Arguments653		///654		/// * collection_id.655		///656		/// * mode: [AccessMode]657		#[weight = <T as Config>::WeightInfo::set_public_access_mode()]658		#[transactional]659		pub fn set_public_access_mode(origin, collection_id: CollectionId, mode: AccessMode) -> DispatchResult660		{661			let sender = ensure_signed(origin)?;662663			let mut target_collection = Self::get_collection(collection_id)?;664			Self::check_owner_permissions(&target_collection, &sender)?;665			target_collection.access = mode;666			target_collection.save()667		}668669		/// Allows Anyone to create tokens if:670		/// * White List is enabled, and671		/// * Address is added to white list, and672		/// * This method was called with True parameter673		///674		/// # Permissions675		/// * Collection Owner676		///677		/// # Arguments678		///679		/// * collection_id.680		///681		/// * mint_permission: Boolean parameter. If True, allows minting to Anyone with conditions above.682		#[weight = <T as Config>::WeightInfo::set_mint_permission()]683		#[transactional]684		pub fn set_mint_permission(origin, collection_id: CollectionId, mint_permission: bool) -> DispatchResult685		{686			let sender = ensure_signed(origin)?;687688			let mut target_collection = Self::get_collection(collection_id)?;689			Self::check_owner_permissions(&target_collection, &sender)?;690			target_collection.mint_mode = mint_permission;691			target_collection.save()692		}693694		/// Change the owner of the collection.695		///696		/// # Permissions697		///698		/// * Collection Owner.699		///700		/// # Arguments701		///702		/// * collection_id.703		///704		/// * new_owner.705		#[weight = <T as Config>::WeightInfo::change_collection_owner()]706		#[transactional]707		pub fn change_collection_owner(origin, collection_id: CollectionId, new_owner: T::AccountId) -> DispatchResult {708709			let sender = ensure_signed(origin)?;710			let mut target_collection = Self::get_collection(collection_id)?;711			Self::check_owner_permissions(&target_collection, &sender)?;712			target_collection.owner = new_owner;713			target_collection.save()714		}715716		/// Adds an admin of the Collection.717		/// 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.718		///719		/// # Permissions720		///721		/// * Collection Owner.722		/// * Collection Admin.723		///724		/// # Arguments725		///726		/// * collection_id: ID of the Collection to add admin for.727		///728		/// * new_admin_id: Address of new admin to add.729		#[weight = <T as Config>::WeightInfo::add_collection_admin()]730		#[transactional]731		pub fn add_collection_admin(origin, collection_id: CollectionId, new_admin_id: T::CrossAccountId) -> DispatchResult {732			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);733			let collection = Self::get_collection(collection_id)?;734			Self::check_owner_or_admin_permissions(&collection, &sender)?;735			let mut admin_arr = <AdminList<T>>::get(collection_id);736737			match admin_arr.binary_search(&new_admin_id) {738				Ok(_) => {},739				Err(idx) => {740					let limits = ChainLimit::get();741					ensure!(admin_arr.len() < limits.collections_admins_limit as usize, Error::<T>::CollectionAdminsLimitExceeded);742					admin_arr.insert(idx, new_admin_id);743					<AdminList<T>>::insert(collection_id, admin_arr);744				}745			}746			Ok(())747		}748749		/// 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.750		///751		/// # Permissions752		///753		/// * Collection Owner.754		/// * Collection Admin.755		///756		/// # Arguments757		///758		/// * collection_id: ID of the Collection to remove admin for.759		///760		/// * account_id: Address of admin to remove.761		#[weight = <T as Config>::WeightInfo::remove_collection_admin()]762		#[transactional]763		pub fn remove_collection_admin(origin, collection_id: CollectionId, account_id: T::CrossAccountId) -> DispatchResult {764			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);765			let collection = Self::get_collection(collection_id)?;766			Self::check_owner_or_admin_permissions(&collection, &sender)?;767			let mut admin_arr = <AdminList<T>>::get(collection_id);768769			if let Ok(idx) = admin_arr.binary_search(&account_id) {770				admin_arr.remove(idx);771				<AdminList<T>>::insert(collection_id, admin_arr);772			}773			Ok(())774		}775776		/// # Permissions777		///778		/// * Collection Owner779		///780		/// # Arguments781		///782		/// * collection_id.783		///784		/// * new_sponsor.785		#[weight = <T as Config>::WeightInfo::set_collection_sponsor()]786		#[transactional]787		pub fn set_collection_sponsor(origin, collection_id: CollectionId, new_sponsor: T::AccountId) -> DispatchResult {788			let sender = ensure_signed(origin)?;789			let mut target_collection = Self::get_collection(collection_id)?;790			Self::check_owner_permissions(&target_collection, &sender)?;791792			target_collection.sponsorship = SponsorshipState::Unconfirmed(new_sponsor);793			target_collection.save()794		}795796		/// # Permissions797		///798		/// * Sponsor.799		///800		/// # Arguments801		///802		/// * collection_id.803		#[weight = <T as Config>::WeightInfo::confirm_sponsorship()]804		#[transactional]805		pub fn confirm_sponsorship(origin, collection_id: CollectionId) -> DispatchResult {806			let sender = ensure_signed(origin)?;807808			let mut target_collection = Self::get_collection(collection_id)?;809			ensure!(810				target_collection.sponsorship.pending_sponsor() == Some(&sender),811				Error::<T>::ConfirmUnsetSponsorFail812			);813814			target_collection.sponsorship = SponsorshipState::Confirmed(sender);815			target_collection.save()816		}817818		/// Switch back to pay-per-own-transaction model.819		///820		/// # Permissions821		///822		/// * Collection owner.823		///824		/// # Arguments825		///826		/// * collection_id.827		#[weight = <T as Config>::WeightInfo::remove_collection_sponsor()]828		#[transactional]829		pub fn remove_collection_sponsor(origin, collection_id: CollectionId) -> DispatchResult {830			let sender = ensure_signed(origin)?;831832			let mut target_collection = Self::get_collection(collection_id)?;833			Self::check_owner_permissions(&target_collection, &sender)?;834835			target_collection.sponsorship = SponsorshipState::Disabled;836			target_collection.save()837		}838839		/// This method creates a concrete instance of NFT Collection created with CreateCollection method.840		///841		/// # Permissions842		///843		/// * Collection Owner.844		/// * Collection Admin.845		/// * Anyone if846		///     * White List is enabled, and847		///     * Address is added to white list, and848		///     * MintPermission is enabled (see SetMintPermission method)849		///850		/// # Arguments851		///852		/// * collection_id: ID of the collection.853		///854		/// * owner: Address, initial owner of the NFT.855		///856		/// * data: Token data to store on chain.857		// #[weight =858		// (130_000_000 as Weight)859		// .saturating_add((2135 as Weight).saturating_mul((properties.len() as u64) as Weight))860		// .saturating_add(RocksDbWeight::get().reads(10 as Weight))861		// .saturating_add(RocksDbWeight::get().writes(8 as Weight))]862863		#[weight = <T as Config>::WeightInfo::create_item(data.data_size())]864		#[transactional]865		pub fn create_item(origin, collection_id: CollectionId, owner: T::CrossAccountId, data: CreateItemData) -> DispatchResult {866			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);867			let collection = Self::get_collection(collection_id)?;868869			Self::create_item_internal(&sender, &collection, &owner, data)?;870871			collection.submit_logs()872		}873874		/// This method creates multiple items in a collection created with CreateCollection method.875		///876		/// # Permissions877		///878		/// * Collection Owner.879		/// * Collection Admin.880		/// * Anyone if881		///     * White List is enabled, and882		///     * Address is added to white list, and883		///     * MintPermission is enabled (see SetMintPermission method)884		///885		/// # Arguments886		///887		/// * collection_id: ID of the collection.888		///889		/// * itemsData: Array items properties. Each property is an array of bytes itself, see [create_item].890		///891		/// * owner: Address, initial owner of the NFT.892		#[weight = <T as Config>::WeightInfo::create_item(items_data.iter()893							   .map(|data| { data.data_size() })894							   .sum())]895		#[transactional]896		pub fn create_multiple_items(origin, collection_id: CollectionId, owner: T::CrossAccountId, items_data: Vec<CreateItemData>) -> DispatchResult {897898			ensure!(!items_data.is_empty(), Error::<T>::EmptyArgument);899			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);900			let collection = Self::get_collection(collection_id)?;901902			Self::create_multiple_items_internal(&sender, &collection, &owner, items_data)?;903904			collection.submit_logs()905		}906907		// TODO! transaction weight908909		/// Set transfers_enabled value for particular collection910		///911		/// # Permissions912		///913		/// * Collection Owner.914		///915		/// # Arguments916		///917		/// * collection_id: ID of the collection.918		///919		/// * value: New flag value.920		#[weight = <T as Config>::WeightInfo::burn_item()]921		#[transactional]922		pub fn set_transfers_enabled_flag(origin, collection_id: CollectionId, value: bool) -> DispatchResult {923924			let sender = ensure_signed(origin)?;925			let mut target_collection = Self::get_collection(collection_id)?;926927			Self::check_owner_permissions(&target_collection, &sender)?;928929			target_collection.transfers_enabled = value;930			target_collection.save()931		}932933		/// Destroys a concrete instance of NFT.934		///935		/// # Permissions936		///937		/// * Collection Owner.938		/// * Collection Admin.939		/// * Current NFT Owner.940		///941		/// # Arguments942		///943		/// * collection_id: ID of the collection.944		///945		/// * item_id: ID of NFT to burn.946		#[weight = <T as Config>::WeightInfo::burn_item()]947		#[transactional]948		pub fn burn_item(origin, collection_id: CollectionId, item_id: TokenId, value: u128) -> DispatchResult {949950			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);951			let target_collection = Self::get_collection(collection_id)?;952953			Self::burn_item_internal(&sender, &target_collection, item_id, value)?;954955			target_collection.submit_logs()956		}957958		/// Change ownership of the token.959		///960		/// # Permissions961		///962		/// * Collection Owner963		/// * Collection Admin964		/// * Current NFT owner965		///966		/// # Arguments967		///968		/// * recipient: Address of token recipient.969		///970		/// * collection_id.971		///972		/// * item_id: ID of the item973		///     * Non-Fungible Mode: Required.974		///     * Fungible Mode: Ignored.975		///     * Re-Fungible Mode: Required.976		///977		/// * value: Amount to transfer.978		///     * Non-Fungible Mode: Ignored979		///     * Fungible Mode: Must specify transferred amount980		///     * Re-Fungible Mode: Must specify transferred portion (between 0 and 1)981		#[weight = <T as Config>::WeightInfo::transfer()]982		#[transactional]983		pub fn transfer(origin, recipient: T::CrossAccountId, collection_id: CollectionId, item_id: TokenId, value: u128) -> DispatchResult {984			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);985			let collection = Self::get_collection(collection_id)?;986987			Self::transfer_internal(&sender, &recipient, &collection, item_id, value)?;988989			collection.submit_logs()990		}991992		/// Set, change, or remove approved address to transfer the ownership of the NFT.993		///994		/// # Permissions995		///996		/// * Collection Owner997		/// * Collection Admin998		/// * Current NFT owner999		///1000		/// # Arguments1001		///1002		/// * approved: Address that is approved to transfer this NFT or zero (if needed to remove approval).1003		///1004		/// * collection_id.1005		///1006		/// * item_id: ID of the item.1007		#[weight = <T as Config>::WeightInfo::approve()]1008		#[transactional]1009		pub fn approve(origin, spender: T::CrossAccountId, collection_id: CollectionId, item_id: TokenId, amount: u128) -> DispatchResult {1010			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);1011			let collection = Self::get_collection(collection_id)?;10121013			Self::approve_internal(&sender, &spender, &collection, item_id, amount)?;10141015			collection.submit_logs()1016		}10171018		/// 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.1019		///1020		/// # Permissions1021		/// * Collection Owner1022		/// * Collection Admin1023		/// * Current NFT owner1024		/// * Address approved by current NFT owner1025		///1026		/// # Arguments1027		///1028		/// * from: Address that owns token.1029		///1030		/// * recipient: Address of token recipient.1031		///1032		/// * collection_id.1033		///1034		/// * item_id: ID of the item.1035		///1036		/// * value: Amount to transfer.1037		#[weight = <T as Config>::WeightInfo::transfer_from()]1038		#[transactional]1039		pub fn transfer_from(origin, from: T::CrossAccountId, recipient: T::CrossAccountId, collection_id: CollectionId, item_id: TokenId, value: u128 ) -> DispatchResult {1040			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);1041			let collection = Self::get_collection(collection_id)?;10421043			Self::transfer_from_internal(&sender, &from, &recipient, &collection, item_id, value)?;10441045			collection.submit_logs()1046		}1047		// #[weight = 0]1048		//     // let no_perm_mes = "You do not have permissions to modify this collection";1049		//     // ensure!(<ApprovedList<T>>::contains_key((collection_id, item_id)), no_perm_mes);1050		//     // let list_itm = <ApprovedList<T>>::get((collection_id, item_id));1051		//     // ensure!(list_itm.contains(&new_owner.clone()), no_perm_mes);10521053		//     // // on_nft_received  call10541055		//     // Self::transfer(origin, collection_id, item_id, new_owner)?;10561057		//     Ok(())1058		// }10591060		/// Set off-chain data schema.1061		///1062		/// # Permissions1063		///1064		/// * Collection Owner1065		/// * Collection Admin1066		///1067		/// # Arguments1068		///1069		/// * collection_id.1070		///1071		/// * schema: String representing the offchain data schema.1072		#[weight = <T as Config>::WeightInfo::set_variable_meta_data()]1073		#[transactional]1074		pub fn set_variable_meta_data (1075			origin,1076			collection_id: CollectionId,1077			item_id: TokenId,1078			data: Vec<u8>1079		) -> DispatchResult {1080			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);10811082			let collection = Self::get_collection(collection_id)?;10831084			Self::set_variable_meta_data_internal(&sender, &collection, item_id, data)?;10851086			Ok(())1087		}10881089		/// Set schema standard1090		/// ImageURL1091		/// Unique1092		///1093		/// # Permissions1094		///1095		/// * Collection Owner1096		/// * Collection Admin1097		///1098		/// # Arguments1099		///1100		/// * collection_id.1101		///1102		/// * schema: SchemaVersion: enum1103		#[weight = <T as Config>::WeightInfo::set_schema_version()]1104		#[transactional]1105		pub fn set_schema_version(1106			origin,1107			collection_id: CollectionId,1108			version: SchemaVersion1109		) -> DispatchResult {1110			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);1111			let mut target_collection = Self::get_collection(collection_id)?;1112			Self::check_owner_or_admin_permissions(&target_collection, &sender)?;1113			target_collection.schema_version = version;1114			target_collection.save()1115		}11161117		/// Set off-chain data schema.1118		///1119		/// # Permissions1120		///1121		/// * Collection Owner1122		/// * Collection Admin1123		///1124		/// # Arguments1125		///1126		/// * collection_id.1127		///1128		/// * schema: String representing the offchain data schema.1129		#[weight = <T as Config>::WeightInfo::set_offchain_schema()]1130		#[transactional]1131		pub fn set_offchain_schema(1132			origin,1133			collection_id: CollectionId,1134			schema: Vec<u8>1135		) -> DispatchResult {1136			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);1137			let mut target_collection = Self::get_collection(collection_id)?;1138			Self::check_owner_or_admin_permissions(&target_collection, &sender)?;11391140			// check schema limit1141			ensure!(schema.len() as u32 <= ChainLimit::get().offchain_schema_limit, "");11421143			target_collection.offchain_schema = schema;1144			target_collection.save()1145		}11461147		/// Set const on-chain data schema.1148		///1149		/// # Permissions1150		///1151		/// * Collection Owner1152		/// * Collection Admin1153		///1154		/// # Arguments1155		///1156		/// * collection_id.1157		///1158		/// * schema: String representing the const on-chain data schema.1159		#[weight = <T as Config>::WeightInfo::set_const_on_chain_schema()]1160		#[transactional]1161		pub fn set_const_on_chain_schema (1162			origin,1163			collection_id: CollectionId,1164			schema: Vec<u8>1165		) -> DispatchResult {1166			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);1167			let mut target_collection = Self::get_collection(collection_id)?;1168			Self::check_owner_or_admin_permissions(&target_collection, &sender)?;11691170			// check schema limit1171			ensure!(schema.len() as u32 <= ChainLimit::get().const_on_chain_schema_limit, "");11721173			target_collection.const_on_chain_schema = schema;1174			target_collection.save()1175		}11761177		/// Set variable on-chain data schema.1178		///1179		/// # Permissions1180		///1181		/// * Collection Owner1182		/// * Collection Admin1183		///1184		/// # Arguments1185		///1186		/// * collection_id.1187		///1188		/// * schema: String representing the variable on-chain data schema.1189		#[weight = <T as Config>::WeightInfo::set_const_on_chain_schema()]1190		#[transactional]1191		pub fn set_variable_on_chain_schema (1192			origin,1193			collection_id: CollectionId,1194			schema: Vec<u8>1195		) -> DispatchResult {1196			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);1197			let mut target_collection = Self::get_collection(collection_id)?;1198			Self::check_owner_or_admin_permissions(&target_collection, &sender)?;11991200			// check schema limit1201			ensure!(schema.len() as u32 <= ChainLimit::get().variable_on_chain_schema_limit, "");12021203			target_collection.variable_on_chain_schema = schema;1204			target_collection.save()1205		}12061207		// Sudo permissions function1208		#[weight = <T as Config>::WeightInfo::set_chain_limits()]1209		#[transactional]1210		pub fn set_chain_limits(1211			origin,1212			limits: ChainLimits1213		) -> DispatchResult {12141215			#[cfg(not(feature = "runtime-benchmarks"))]1216			ensure_root(origin)?;12171218			<ChainLimit>::put(limits);1219			Ok(())1220		}12211222		#[weight = <T as Config>::WeightInfo::set_collection_limits()]1223		#[transactional]1224		pub fn set_collection_limits(1225			origin,1226			collection_id: u32,1227			new_limits: CollectionLimits<T::BlockNumber>,1228		) -> DispatchResult {1229			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);1230			let mut target_collection = Self::get_collection(collection_id)?;1231			Self::check_owner_permissions(&target_collection, sender.as_sub())?;1232			let old_limits = &target_collection.limits;1233			let chain_limits = ChainLimit::get();12341235			// collection bounds1236			ensure!(new_limits.sponsor_transfer_timeout <= MAX_SPONSOR_TIMEOUT &&1237				new_limits.account_token_ownership_limit <= MAX_TOKEN_OWNERSHIP &&1238				new_limits.sponsored_data_size <= chain_limits.custom_data_limit,1239				Error::<T>::CollectionLimitBoundsExceeded);12401241			// token_limit   check  prev1242			ensure!(old_limits.token_limit >= new_limits.token_limit, Error::<T>::CollectionTokenLimitExceeded);1243			ensure!(new_limits.token_limit > 0, Error::<T>::CollectionTokenLimitExceeded);12441245			ensure!(1246				(old_limits.owner_can_transfer || !new_limits.owner_can_transfer) &&1247				(old_limits.owner_can_destroy || !new_limits.owner_can_destroy),1248				Error::<T>::OwnerPermissionsCantBeReverted,1249			);12501251			target_collection.limits = new_limits;12521253			target_collection.save()1254		}1255	}1256}12571258impl<T: Config> Module<T> {1259	pub fn create_item_internal(1260		sender: &T::CrossAccountId,1261		collection: &CollectionHandle<T>,1262		owner: &T::CrossAccountId,1263		data: CreateItemData,1264	) -> DispatchResult {1265		Self::can_create_items_in_collection(collection, sender, owner, 1)?;1266		Self::validate_create_item_args(collection, &data)?;1267		Self::create_item_no_validation(collection, owner, data)?;12681269		Ok(())1270	}12711272	pub fn transfer_internal(1273		sender: &T::CrossAccountId,1274		recipient: &T::CrossAccountId,1275		target_collection: &CollectionHandle<T>,1276		item_id: TokenId,1277		value: u128,1278	) -> DispatchResult {1279		target_collection.consume_gas(2000000)?;1280		// Limits check1281		Self::is_correct_transfer(target_collection, recipient)?;12821283		// Transfer permissions check1284		ensure!(1285			Self::is_item_owner(sender, target_collection, item_id)1286				|| Self::is_owner_or_admin_permissions(target_collection, sender),1287			Error::<T>::NoPermission1288		);12891290		if target_collection.access == AccessMode::WhiteList {1291			Self::check_white_list(target_collection, sender)?;1292			Self::check_white_list(target_collection, recipient)?;1293		}12941295		match target_collection.mode {1296			CollectionMode::NFT => Self::transfer_nft(1297				target_collection,1298				item_id,1299				sender.clone(),1300				recipient.clone(),1301			)?,1302			CollectionMode::Fungible(_) => {1303				Self::transfer_fungible(target_collection, value, sender, recipient)?1304			}1305			CollectionMode::ReFungible => Self::transfer_refungible(1306				target_collection,1307				item_id,1308				value,1309				sender.clone(),1310				recipient.clone(),1311			)?,1312			_ => (),1313		};13141315		Self::deposit_event(RawEvent::Transfer(1316			target_collection.id,1317			item_id,1318			sender.clone(),1319			recipient.clone(),1320			value,1321		));13221323		Ok(())1324	}13251326	pub fn approve_internal(1327		sender: &T::CrossAccountId,1328		spender: &T::CrossAccountId,1329		collection: &CollectionHandle<T>,1330		item_id: TokenId,1331		amount: u128,1332	) -> DispatchResult {1333		collection.consume_gas(2000000)?;1334		Self::token_exists(collection, item_id)?;13351336		// Transfer permissions check1337		let bypasses_limits = collection.limits.owner_can_transfer1338			&& Self::is_owner_or_admin_permissions(collection, sender);13391340		let allowance_limit = if bypasses_limits {1341			None1342		} else if let Some(amount) = Self::owned_amount(sender, collection, item_id) {1343			Some(amount)1344		} else {1345			fail!(Error::<T>::NoPermission);1346		};13471348		if collection.access == AccessMode::WhiteList {1349			Self::check_white_list(collection, sender)?;1350			Self::check_white_list(collection, spender)?;1351		}13521353		let allowance: u128 = amount1354			.checked_add(<Allowances<T>>::get(1355				collection.id,1356				(item_id, sender.as_sub(), spender.as_sub()),1357			))1358			.ok_or(Error::<T>::NumOverflow)?;1359		if let Some(limit) = allowance_limit {1360			ensure!(limit >= allowance, Error::<T>::TokenValueTooLow);1361		}1362		<Allowances<T>>::insert(1363			collection.id,1364			(item_id, sender.as_sub(), spender.as_sub()),1365			allowance,1366		);13671368		if matches!(collection.mode, CollectionMode::NFT) {1369			// TODO: NFT: only one owner may exist for token in ERC7211370			collection.log(ERC721Events::Approval {1371				owner: *sender.as_eth(),1372				approved: *spender.as_eth(),1373				token_id: item_id.into(),1374			})?;1375		}13761377		if matches!(collection.mode, CollectionMode::Fungible(_)) {1378			// TODO: NFT: only one owner may exist for token in ERC201379			collection.log(ERC20Events::Approval {1380				owner: *sender.as_eth(),1381				spender: *spender.as_eth(),1382				value: allowance.into(),1383			})?;1384		}13851386		Self::deposit_event(RawEvent::Approved(1387			collection.id,1388			item_id,1389			sender.clone(),1390			spender.clone(),1391			allowance,1392		));1393		Ok(())1394	}13951396	pub fn transfer_from_internal(1397		sender: &T::CrossAccountId,1398		from: &T::CrossAccountId,1399		recipient: &T::CrossAccountId,1400		collection: &CollectionHandle<T>,1401		item_id: TokenId,1402		amount: u128,1403	) -> DispatchResult {1404		if sender == from {1405			// Transfer by `from`, because it is either equal to sender, or derived from him1406			return Self::transfer_internal(from, recipient, collection, item_id, amount);1407		}14081409		collection.consume_gas(2000000)?;1410		// Check approval1411		let approval: u128 =1412			<Allowances<T>>::get(collection.id, (item_id, from.as_sub(), sender.as_sub()));14131414		// Limits check1415		Self::is_correct_transfer(collection, recipient)?;14161417		// Transfer permissions check1418		ensure!(1419			approval >= amount1420				|| (collection.limits.owner_can_transfer1421					&& Self::is_owner_or_admin_permissions(collection, sender)),1422			Error::<T>::NoPermission1423		);14241425		if collection.access == AccessMode::WhiteList {1426			Self::check_white_list(collection, sender)?;1427			Self::check_white_list(collection, recipient)?;1428		}14291430		// Reduce approval by transferred amount or remove if remaining approval drops to 01431		let allowance = approval.saturating_sub(amount);1432		if allowance > 0 {1433			<Allowances<T>>::insert(1434				collection.id,1435				(item_id, from.as_sub(), sender.as_sub()),1436				allowance,1437			);1438		} else {1439			<Allowances<T>>::remove(collection.id, (item_id, from.as_sub(), sender.as_sub()));1440		}14411442		match collection.mode {1443			CollectionMode::NFT => {1444				Self::transfer_nft(collection, item_id, from.clone(), recipient.clone())?1445			}1446			CollectionMode::Fungible(_) => {1447				Self::transfer_fungible(collection, amount, from, recipient)?1448			}1449			CollectionMode::ReFungible => Self::transfer_refungible(1450				collection,1451				item_id,1452				amount,1453				from.clone(),1454				recipient.clone(),1455			)?,1456			_ => (),1457		};14581459		if matches!(collection.mode, CollectionMode::Fungible(_)) {1460			collection.log(ERC20Events::Approval {1461				owner: *from.as_eth(),1462				spender: *sender.as_eth(),1463				value: allowance.into(),1464			})?;1465		}14661467		Ok(())1468	}14691470	pub fn set_variable_meta_data_internal(1471		sender: &T::CrossAccountId,1472		collection: &CollectionHandle<T>,1473		item_id: TokenId,1474		data: Vec<u8>,1475	) -> DispatchResult {1476		Self::token_exists(collection, item_id)?;14771478		ensure!(1479			ChainLimit::get().custom_data_limit >= data.len() as u32,1480			Error::<T>::TokenVariableDataLimitExceeded1481		);14821483		// Modify permissions check1484		ensure!(1485			Self::is_item_owner(sender, collection, item_id)1486				|| Self::is_owner_or_admin_permissions(collection, sender),1487			Error::<T>::NoPermission1488		);14891490		match collection.mode {1491			CollectionMode::NFT => Self::set_nft_variable_data(collection, item_id, data)?,1492			CollectionMode::ReFungible => {1493				Self::set_re_fungible_variable_data(collection, item_id, data)?1494			}1495			CollectionMode::Fungible(_) => fail!(Error::<T>::CantStoreMetadataInFungibleTokens),1496			_ => fail!(Error::<T>::UnexpectedCollectionType),1497		};14981499		Ok(())1500	}15011502	pub fn create_multiple_items_internal(1503		sender: &T::CrossAccountId,1504		collection: &CollectionHandle<T>,1505		owner: &T::CrossAccountId,1506		items_data: Vec<CreateItemData>,1507	) -> DispatchResult {1508		Self::can_create_items_in_collection(collection, sender, owner, items_data.len() as u32)?;15091510		for data in &items_data {1511			Self::validate_create_item_args(collection, data)?;1512		}1513		for data in &items_data {1514			Self::create_item_no_validation(collection, owner, data.clone())?;1515		}15161517		Ok(())1518	}15191520	pub fn burn_item_internal(1521		sender: &T::CrossAccountId,1522		collection: &CollectionHandle<T>,1523		item_id: TokenId,1524		value: u128,1525	) -> DispatchResult {1526		ensure!(1527			Self::is_item_owner(sender, collection, item_id)1528				|| (collection.limits.owner_can_transfer1529					&& Self::is_owner_or_admin_permissions(collection, sender)),1530			Error::<T>::NoPermission1531		);15321533		if collection.access == AccessMode::WhiteList {1534			Self::check_white_list(collection, sender)?;1535		}15361537		match collection.mode {1538			CollectionMode::NFT => Self::burn_nft_item(collection, item_id)?,1539			CollectionMode::Fungible(_) => Self::burn_fungible_item(sender, collection, value)?,1540			CollectionMode::ReFungible => Self::burn_refungible_item(collection, item_id, sender)?,1541			_ => (),1542		};15431544		Ok(())1545	}15461547	pub fn toggle_white_list_internal(1548		sender: &T::CrossAccountId,1549		collection: &CollectionHandle<T>,1550		address: &T::CrossAccountId,1551		whitelisted: bool,1552	) -> DispatchResult {1553		Self::check_owner_or_admin_permissions(collection, sender)?;15541555		if whitelisted {1556			<WhiteList<T>>::insert(collection.id, address.as_sub(), true);1557		} else {1558			<WhiteList<T>>::remove(collection.id, address.as_sub());1559		}15601561		Ok(())1562	}15631564	fn is_correct_transfer(1565		collection: &CollectionHandle<T>,1566		recipient: &T::CrossAccountId,1567	) -> DispatchResult {1568		let collection_id = collection.id;15691570		// check token limit and account token limit1571		let account_items: u32 =1572			<AddressTokens<T>>::get(collection_id, recipient.as_sub()).len() as u32;1573		ensure!(1574			collection.limits.account_token_ownership_limit > account_items,1575			Error::<T>::AccountTokenLimitExceeded1576		);15771578		// preliminary transfer check1579		ensure!(collection.transfers_enabled, Error::<T>::TransferNotAllowed);15801581		Ok(())1582	}15831584	fn can_create_items_in_collection(1585		collection: &CollectionHandle<T>,1586		sender: &T::CrossAccountId,1587		owner: &T::CrossAccountId,1588		amount: u32,1589	) -> DispatchResult {1590		let collection_id = collection.id;15911592		// check token limit and account token limit1593		let total_items: u32 = ItemListIndex::get(collection_id)1594			.checked_add(amount)1595			.ok_or(Error::<T>::CollectionTokenLimitExceeded)?;1596		let account_items: u32 = (<AddressTokens<T>>::get(collection_id, owner.as_sub()).len()1597			as u32)1598			.checked_add(amount)1599			.ok_or(Error::<T>::AccountTokenLimitExceeded)?;1600		ensure!(1601			collection.limits.token_limit >= total_items,1602			Error::<T>::CollectionTokenLimitExceeded1603		);1604		ensure!(1605			collection.limits.account_token_ownership_limit >= account_items,1606			Error::<T>::AccountTokenLimitExceeded1607		);16081609		if !Self::is_owner_or_admin_permissions(collection, sender) {1610			ensure!(collection.mint_mode, Error::<T>::PublicMintingNotAllowed);1611			Self::check_white_list(collection, owner)?;1612			Self::check_white_list(collection, sender)?;1613		}16141615		Ok(())1616	}16171618	fn validate_create_item_args(1619		target_collection: &CollectionHandle<T>,1620		data: &CreateItemData,1621	) -> DispatchResult {1622		match target_collection.mode {1623			CollectionMode::NFT => {1624				if let CreateItemData::NFT(data) = data {1625					// check sizes1626					ensure!(1627						ChainLimit::get().custom_data_limit >= data.const_data.len() as u32,1628						Error::<T>::TokenConstDataLimitExceeded1629					);1630					ensure!(1631						ChainLimit::get().custom_data_limit >= data.variable_data.len() as u32,1632						Error::<T>::TokenVariableDataLimitExceeded1633					);1634				} else {1635					fail!(Error::<T>::NotNftDataUsedToMintNftCollectionToken);1636				}1637			}1638			CollectionMode::Fungible(_) => {1639				if let CreateItemData::Fungible(_) = data {1640				} else {1641					fail!(Error::<T>::NotFungibleDataUsedToMintFungibleCollectionToken);1642				}1643			}1644			CollectionMode::ReFungible => {1645				if let CreateItemData::ReFungible(data) = data {1646					// check sizes1647					ensure!(1648						ChainLimit::get().custom_data_limit >= data.const_data.len() as u32,1649						Error::<T>::TokenConstDataLimitExceeded1650					);1651					ensure!(1652						ChainLimit::get().custom_data_limit >= data.variable_data.len() as u32,1653						Error::<T>::TokenVariableDataLimitExceeded1654					);16551656					// Check refungibility limits1657					ensure!(1658						data.pieces <= MAX_REFUNGIBLE_PIECES,1659						Error::<T>::WrongRefungiblePieces1660					);1661					ensure!(data.pieces > 0, Error::<T>::WrongRefungiblePieces);1662				} else {1663					fail!(Error::<T>::NotReFungibleDataUsedToMintReFungibleCollectionToken);1664				}1665			}1666			_ => {1667				fail!(Error::<T>::UnexpectedCollectionType);1668			}1669		};16701671		Ok(())1672	}16731674	fn create_item_no_validation(1675		collection: &CollectionHandle<T>,1676		owner: &T::CrossAccountId,1677		data: CreateItemData,1678	) -> DispatchResult {1679		match data {1680			CreateItemData::NFT(data) => {1681				let item = NftItemType {1682					owner: owner.clone(),1683					const_data: data.const_data,1684					variable_data: data.variable_data,1685				};16861687				Self::add_nft_item(collection, item)?;1688			}1689			CreateItemData::Fungible(data) => {1690				Self::add_fungible_item(collection, owner, data.value)?;1691			}1692			CreateItemData::ReFungible(data) => {1693				let owner_list = vec![Ownership {1694					owner: owner.clone(),1695					fraction: data.pieces,1696				}];16971698				let item = ReFungibleItemType {1699					owner: owner_list,1700					const_data: data.const_data,1701					variable_data: data.variable_data,1702				};17031704				Self::add_refungible_item(collection, item)?;1705			}1706		};17071708		Ok(())1709	}17101711	fn add_fungible_item(1712		collection: &CollectionHandle<T>,1713		owner: &T::CrossAccountId,1714		value: u128,1715	) -> DispatchResult {1716		let collection_id = collection.id;17171718		// Does new owner already have an account?1719		let balance: u128 = <FungibleItemList<T>>::get(collection_id, owner.as_sub()).value;17201721		// Mint1722		let item = FungibleItemType {1723			value: balance.checked_add(value).ok_or(Error::<T>::NumOverflow)?,1724		};1725		<FungibleItemList<T>>::insert(collection_id, owner.as_sub(), item);17261727		// Update balance1728		let new_balance = <Balance<T>>::get(collection_id, owner.as_sub())1729			.checked_add(value)1730			.ok_or(Error::<T>::NumOverflow)?;1731		<Balance<T>>::insert(collection_id, owner.as_sub(), new_balance);17321733		Self::deposit_event(RawEvent::ItemCreated(collection_id, 0, owner.clone()));1734		Ok(())1735	}17361737	fn add_refungible_item(1738		collection: &CollectionHandle<T>,1739		item: ReFungibleItemType<T::CrossAccountId>,1740	) -> DispatchResult {1741		let collection_id = collection.id;17421743		let current_index = <ItemListIndex>::get(collection_id)1744			.checked_add(1)1745			.ok_or(Error::<T>::NumOverflow)?;1746		let itemcopy = item.clone();17471748		ensure!(item.owner.len() == 1, Error::<T>::BadCreateRefungibleCall,);1749		let item_owner = item.owner.first().expect("only one owner is defined");17501751		let value = item_owner.fraction;1752		let owner = item_owner.owner.clone();17531754		Self::add_token_index(collection_id, current_index, &owner)?;17551756		<ItemListIndex>::insert(collection_id, current_index);1757		<ReFungibleItemList<T>>::insert(collection_id, current_index, itemcopy);17581759		// Update balance1760		let new_balance = <Balance<T>>::get(collection_id, owner.as_sub())1761			.checked_add(value)1762			.ok_or(Error::<T>::NumOverflow)?;1763		<Balance<T>>::insert(collection_id, owner.as_sub(), new_balance);17641765		Self::deposit_event(RawEvent::ItemCreated(collection_id, current_index, owner));1766		Ok(())1767	}17681769	fn add_nft_item(1770		collection: &CollectionHandle<T>,1771		item: NftItemType<T::CrossAccountId>,1772	) -> DispatchResult {1773		let collection_id = collection.id;17741775		let current_index = <ItemListIndex>::get(collection_id)1776			.checked_add(1)1777			.ok_or(Error::<T>::NumOverflow)?;17781779		let item_owner = item.owner.clone();1780		Self::add_token_index(collection_id, current_index, &item.owner)?;17811782		<ItemListIndex>::insert(collection_id, current_index);1783		<NftItemList<T>>::insert(collection_id, current_index, item);17841785		// Update balance1786		let new_balance = <Balance<T>>::get(collection_id, item_owner.as_sub())1787			.checked_add(1)1788			.ok_or(Error::<T>::NumOverflow)?;1789		<Balance<T>>::insert(collection_id, item_owner.as_sub(), new_balance);17901791		collection.log(ERC721Events::Transfer {1792			from: H160::default(),1793			to: *item_owner.as_eth(),1794			token_id: current_index.into(),1795		})?;1796		Self::deposit_event(RawEvent::ItemCreated(1797			collection_id,1798			current_index,1799			item_owner,1800		));1801		Ok(())1802	}18031804	fn burn_refungible_item(1805		collection: &CollectionHandle<T>,1806		item_id: TokenId,1807		owner: &T::CrossAccountId,1808	) -> DispatchResult {1809		let collection_id = collection.id;18101811		let mut token = <ReFungibleItemList<T>>::get(collection_id, item_id)1812			.ok_or(Error::<T>::TokenNotFound)?;1813		let rft_balance = token1814			.owner1815			.iter()1816			.find(|&i| i.owner == *owner)1817			.ok_or(Error::<T>::TokenNotFound)?;1818		Self::remove_token_index(collection_id, item_id, owner)?;18191820		// update balance1821		let new_balance = <Balance<T>>::get(collection_id, rft_balance.owner.as_sub())1822			.checked_sub(rft_balance.fraction)1823			.ok_or(Error::<T>::NumOverflow)?;1824		<Balance<T>>::insert(collection_id, rft_balance.owner.as_sub(), new_balance);18251826		// Re-create owners list with sender removed1827		let index = token1828			.owner1829			.iter()1830			.position(|i| i.owner == *owner)1831			.expect("owned item is exists");1832		token.owner.remove(index);1833		let owner_count = token.owner.len();18341835		// Burn the token completely if this was the last (only) owner1836		if owner_count == 0 {1837			<ReFungibleItemList<T>>::remove(collection_id, item_id);1838			<VariableMetaDataBasket<T>>::remove(collection_id, item_id);1839		} else {1840			<ReFungibleItemList<T>>::insert(collection_id, item_id, token);1841		}18421843		Ok(())1844	}18451846	fn burn_nft_item(collection: &CollectionHandle<T>, item_id: TokenId) -> DispatchResult {1847		let collection_id = collection.id;18481849		let item =1850			<NftItemList<T>>::get(collection_id, item_id).ok_or(Error::<T>::TokenNotFound)?;1851		Self::remove_token_index(collection_id, item_id, &item.owner)?;18521853		// update balance1854		let new_balance = <Balance<T>>::get(collection_id, item.owner.as_sub())1855			.checked_sub(1)1856			.ok_or(Error::<T>::NumOverflow)?;1857		<Balance<T>>::insert(collection_id, item.owner.as_sub(), new_balance);1858		<NftItemList<T>>::remove(collection_id, item_id);1859		<VariableMetaDataBasket<T>>::remove(collection_id, item_id);18601861		Self::deposit_event(RawEvent::ItemDestroyed(collection.id, item_id));1862		Ok(())1863	}18641865	fn burn_fungible_item(1866		owner: &T::CrossAccountId,1867		collection: &CollectionHandle<T>,1868		value: u128,1869	) -> DispatchResult {1870		let collection_id = collection.id;18711872		let mut balance = <FungibleItemList<T>>::get(collection_id, owner.as_sub());1873		ensure!(balance.value >= value, Error::<T>::TokenValueNotEnough);18741875		// update balance1876		let new_balance = <Balance<T>>::get(collection_id, owner.as_sub())1877			.checked_sub(value)1878			.ok_or(Error::<T>::NumOverflow)?;1879		<Balance<T>>::insert(collection_id, owner.as_sub(), new_balance);18801881		if balance.value - value > 0 {1882			balance.value -= value;1883			<FungibleItemList<T>>::insert(collection_id, owner.as_sub(), balance);1884		} else {1885			<FungibleItemList<T>>::remove(collection_id, owner.as_sub());1886		}18871888		collection.log(ERC20Events::Transfer {1889			from: *owner.as_eth(),1890			to: H160::default(),1891			value: value.into(),1892		})?;1893		Ok(())1894	}18951896	pub fn get_collection(1897		collection_id: CollectionId,1898	) -> Result<CollectionHandle<T>, sp_runtime::DispatchError> {1899		Ok(<CollectionHandle<T>>::get(collection_id).ok_or(Error::<T>::CollectionNotFound)?)1900	}19011902	fn check_owner_permissions(1903		target_collection: &CollectionHandle<T>,1904		subject: &T::AccountId,1905	) -> DispatchResult {1906		ensure!(1907			*subject == target_collection.owner,1908			Error::<T>::NoPermission1909		);19101911		Ok(())1912	}19131914	fn is_owner_or_admin_permissions(1915		collection: &CollectionHandle<T>,1916		subject: &T::CrossAccountId,1917	) -> bool {1918		*subject.as_sub() == collection.owner1919			|| <AdminList<T>>::get(collection.id).contains(subject)1920	}19211922	fn check_owner_or_admin_permissions(1923		collection: &CollectionHandle<T>,1924		subject: &T::CrossAccountId,1925	) -> DispatchResult {1926		ensure!(1927			Self::is_owner_or_admin_permissions(collection, subject),1928			Error::<T>::NoPermission1929		);19301931		Ok(())1932	}19331934	fn owned_amount(1935		subject: &T::CrossAccountId,1936		target_collection: &CollectionHandle<T>,1937		item_id: TokenId,1938	) -> Option<u128> {1939		let collection_id = target_collection.id;19401941		match target_collection.mode {1942			CollectionMode::NFT => {1943				(<NftItemList<T>>::get(collection_id, item_id)?.owner == *subject).then(|| 1)1944			}1945			CollectionMode::Fungible(_) => {1946				Some(<FungibleItemList<T>>::get(collection_id, &subject.as_sub()).value)1947			}1948			CollectionMode::ReFungible => <ReFungibleItemList<T>>::get(collection_id, item_id)?1949				.owner1950				.iter()1951				.find(|i| i.owner == *subject)1952				.map(|i| i.fraction),1953			CollectionMode::Invalid => None,1954		}1955	}19561957	fn is_item_owner(1958		subject: &T::CrossAccountId,1959		target_collection: &CollectionHandle<T>,1960		item_id: TokenId,1961	) -> bool {1962		match target_collection.mode {1963			CollectionMode::Fungible(_) => true,1964			_ => Self::owned_amount(subject, target_collection, item_id).is_some(),1965		}1966	}19671968	fn check_white_list(1969		collection: &CollectionHandle<T>,1970		address: &T::CrossAccountId,1971	) -> DispatchResult {1972		let collection_id = collection.id;19731974		let mes = Error::<T>::AddresNotInWhiteList;1975		ensure!(1976			<WhiteList<T>>::contains_key(collection_id, address.as_sub()),1977			mes1978		);19791980		Ok(())1981	}19821983	/// Check if token exists. In case of Fungible, check if there is an entry for1984	/// the owner in fungible balances double map1985	fn token_exists(target_collection: &CollectionHandle<T>, item_id: TokenId) -> DispatchResult {1986		let collection_id = target_collection.id;1987		let exists = match target_collection.mode {1988			CollectionMode::NFT => <NftItemList<T>>::contains_key(collection_id, item_id),1989			CollectionMode::Fungible(_) => true,1990			CollectionMode::ReFungible => {1991				<ReFungibleItemList<T>>::contains_key(collection_id, item_id)1992			}1993			_ => false,1994		};19951996		ensure!(exists, Error::<T>::TokenNotFound);1997		Ok(())1998	}19992000	fn transfer_fungible(2001		collection: &CollectionHandle<T>,2002		value: u128,2003		owner: &T::CrossAccountId,2004		recipient: &T::CrossAccountId,2005	) -> DispatchResult {2006		let collection_id = collection.id;20072008		let mut balance = <FungibleItemList<T>>::get(collection_id, owner.as_sub());2009		ensure!(balance.value >= value, Error::<T>::TokenValueTooLow);20102011		// Send balance to recipient (updates balanceOf of recipient)2012		Self::add_fungible_item(collection, recipient, value)?;20132014		// update balanceOf of sender2015		<Balance<T>>::insert(collection_id, owner.as_sub(), balance.value - value);20162017		// Reduce or remove sender2018		if balance.value == value {2019			<FungibleItemList<T>>::remove(collection_id, owner.as_sub());2020		} else {2021			balance.value -= value;2022			<FungibleItemList<T>>::insert(collection_id, owner.as_sub(), balance);2023		}20242025		collection.log(ERC20Events::Transfer {2026			from: *owner.as_eth(),2027			to: *recipient.as_eth(),2028			value: value.into(),2029		})?;2030		Self::deposit_event(RawEvent::Transfer(2031			collection.id,2032			1,2033			owner.clone(),2034			recipient.clone(),2035			value,2036		));20372038		Ok(())2039	}20402041	fn transfer_refungible(2042		collection: &CollectionHandle<T>,2043		item_id: TokenId,2044		value: u128,2045		owner: T::CrossAccountId,2046		new_owner: T::CrossAccountId,2047	) -> DispatchResult {2048		let collection_id = collection.id;2049		let full_item = <ReFungibleItemList<T>>::get(collection_id, item_id)2050			.ok_or(Error::<T>::TokenNotFound)?;20512052		let item = full_item2053			.owner2054			.iter()2055			.find(|i| i.owner == owner)2056			.ok_or(Error::<T>::TokenNotFound)?;2057		let amount = item.fraction;20582059		ensure!(amount >= value, Error::<T>::TokenValueTooLow);20602061		// update balance2062		let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.as_sub())2063			.checked_sub(value)2064			.ok_or(Error::<T>::NumOverflow)?;2065		<Balance<T>>::insert(collection_id, item.owner.as_sub(), balance_old_owner);20662067		let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.as_sub())2068			.checked_add(value)2069			.ok_or(Error::<T>::NumOverflow)?;2070		<Balance<T>>::insert(collection_id, new_owner.as_sub(), balance_new_owner);20712072		let old_owner = item.owner.clone();2073		let new_owner_has_account = full_item.owner.iter().any(|i| i.owner == new_owner);20742075		let mut new_full_item = full_item.clone();2076		// transfer2077		if amount == value && !new_owner_has_account {2078			// change owner2079			// new owner do not have account2080			new_full_item2081				.owner2082				.iter_mut()2083				.find(|i| i.owner == owner)2084				.expect("old owner does present in refungible")2085				.owner = new_owner.clone();2086			<ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);20872088			// update index collection2089			Self::move_token_index(collection_id, item_id, &old_owner, &new_owner)?;2090		} else {2091			new_full_item2092				.owner2093				.iter_mut()2094				.find(|i| i.owner == owner)2095				.expect("old owner does present in refungible")2096				.fraction -= value;20972098			// separate amount2099			if new_owner_has_account {2100				// new owner has account2101				new_full_item2102					.owner2103					.iter_mut()2104					.find(|i| i.owner == new_owner)2105					.expect("new owner has account")2106					.fraction += value;2107			} else {2108				// new owner do not have account2109				new_full_item.owner.push(Ownership {2110					owner: new_owner.clone(),2111					fraction: value,2112				});2113				Self::add_token_index(collection_id, item_id, &new_owner)?;2114			}21152116			<ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);2117		}21182119		Self::deposit_event(RawEvent::Transfer(2120			collection.id,2121			item_id,2122			owner,2123			new_owner,2124			amount,2125		));21262127		Ok(())2128	}21292130	fn transfer_nft(2131		collection: &CollectionHandle<T>,2132		item_id: TokenId,2133		sender: T::CrossAccountId,2134		new_owner: T::CrossAccountId,2135	) -> DispatchResult {2136		let collection_id = collection.id;2137		let mut item =2138			<NftItemList<T>>::get(collection_id, item_id).ok_or(Error::<T>::TokenNotFound)?;21392140		ensure!(sender == item.owner, Error::<T>::MustBeTokenOwner);21412142		// update balance2143		let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.as_sub())2144			.checked_sub(1)2145			.ok_or(Error::<T>::NumOverflow)?;2146		<Balance<T>>::insert(collection_id, item.owner.as_sub(), balance_old_owner);21472148		let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.as_sub())2149			.checked_add(1)2150			.ok_or(Error::<T>::NumOverflow)?;2151		<Balance<T>>::insert(collection_id, new_owner.as_sub(), balance_new_owner);21522153		// change owner2154		let old_owner = item.owner.clone();2155		item.owner = new_owner.clone();2156		<NftItemList<T>>::insert(collection_id, item_id, item);21572158		// update index collection2159		Self::move_token_index(collection_id, item_id, &old_owner, &new_owner)?;21602161		collection.log(ERC721Events::Transfer {2162			from: *sender.as_eth(),2163			to: *new_owner.as_eth(),2164			token_id: item_id.into(),2165		})?;2166		Self::deposit_event(RawEvent::Transfer(2167			collection.id,2168			item_id,2169			sender,2170			new_owner,2171			1,2172		));21732174		Ok(())2175	}21762177	fn set_re_fungible_variable_data(2178		collection: &CollectionHandle<T>,2179		item_id: TokenId,2180		data: Vec<u8>,2181	) -> DispatchResult {2182		let collection_id = collection.id;2183		let mut item = <ReFungibleItemList<T>>::get(collection_id, item_id)2184			.ok_or(Error::<T>::TokenNotFound)?;21852186		item.variable_data = data;21872188		<ReFungibleItemList<T>>::insert(collection_id, item_id, item);21892190		Ok(())2191	}21922193	fn set_nft_variable_data(2194		collection: &CollectionHandle<T>,2195		item_id: TokenId,2196		data: Vec<u8>,2197	) -> DispatchResult {2198		let collection_id = collection.id;2199		let mut item =2200			<NftItemList<T>>::get(collection_id, item_id).ok_or(Error::<T>::TokenNotFound)?;22012202		item.variable_data = data;22032204		<NftItemList<T>>::insert(collection_id, item_id, item);22052206		Ok(())2207	}22082209	#[allow(dead_code)]2210	fn init_collection(item: &Collection<T>) {2211		// check params2212		assert!(2213			item.decimal_points <= MAX_DECIMAL_POINTS,2214			"decimal_points parameter must be lower than MAX_DECIMAL_POINTS"2215		);2216		assert!(2217			item.name.len() <= 64,2218			"Collection name can not be longer than 63 char"2219		);2220		assert!(2221			item.name.len() <= 256,2222			"Collection description can not be longer than 255 char"2223		);2224		assert!(2225			item.token_prefix.len() <= 16,2226			"Token prefix can not be longer than 15 char"2227		);22282229		// Generate next collection ID2230		let next_id = CreatedCollectionCount::get().checked_add(1).unwrap();22312232		CreatedCollectionCount::put(next_id);2233	}22342235	#[allow(dead_code)]2236	fn init_nft_token(collection_id: CollectionId, item: &NftItemType<T::CrossAccountId>) {2237		let current_index = <ItemListIndex>::get(collection_id).checked_add(1).unwrap();22382239		Self::add_token_index(collection_id, current_index, &item.owner).unwrap();22402241		<ItemListIndex>::insert(collection_id, current_index);22422243		// Update balance2244		let new_balance = <Balance<T>>::get(collection_id, item.owner.as_sub())2245			.checked_add(1)2246			.unwrap();2247		<Balance<T>>::insert(collection_id, item.owner.as_sub(), new_balance);2248	}22492250	#[allow(dead_code)]2251	fn init_fungible_token(2252		collection_id: CollectionId,2253		owner: &T::CrossAccountId,2254		item: &FungibleItemType,2255	) {2256		let current_index = <ItemListIndex>::get(collection_id).checked_add(1).unwrap();22572258		Self::add_token_index(collection_id, current_index, owner).unwrap();22592260		<ItemListIndex>::insert(collection_id, current_index);22612262		// Update balance2263		let new_balance = <Balance<T>>::get(collection_id, owner.as_sub())2264			.checked_add(item.value)2265			.unwrap();2266		<Balance<T>>::insert(collection_id, owner.as_sub(), new_balance);2267	}22682269	#[allow(dead_code)]2270	fn init_refungible_token(2271		collection_id: CollectionId,2272		item: &ReFungibleItemType<T::CrossAccountId>,2273	) {2274		let current_index = <ItemListIndex>::get(collection_id).checked_add(1).unwrap();22752276		let value = item.owner.first().unwrap().fraction;2277		let owner = item.owner.first().unwrap().owner.clone();22782279		Self::add_token_index(collection_id, current_index, &owner).unwrap();22802281		<ItemListIndex>::insert(collection_id, current_index);22822283		// Update balance2284		let new_balance = <Balance<T>>::get(collection_id, &owner.as_sub())2285			.checked_add(value)2286			.unwrap();2287		<Balance<T>>::insert(collection_id, owner.as_sub(), new_balance);2288	}22892290	fn add_token_index(2291		collection_id: CollectionId,2292		item_index: TokenId,2293		owner: &T::CrossAccountId,2294	) -> DispatchResult {2295		// add to account limit2296		if <AccountItemCount<T>>::contains_key(owner.as_sub()) {2297			// bound Owned tokens by a single address2298			let count = <AccountItemCount<T>>::get(owner.as_sub());2299			ensure!(2300				count < ChainLimit::get().account_token_ownership_limit,2301				Error::<T>::AddressOwnershipLimitExceeded2302			);23032304			<AccountItemCount<T>>::insert(2305				owner.as_sub(),2306				count.checked_add(1).ok_or(Error::<T>::NumOverflow)?,2307			);2308		} else {2309			<AccountItemCount<T>>::insert(owner.as_sub(), 1);2310		}23112312		let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner.as_sub());2313		if list_exists {2314			let mut list = <AddressTokens<T>>::get(collection_id, owner.as_sub());2315			let item_contains = list.contains(&item_index.clone());23162317			if !item_contains {2318				list.push(item_index);2319			}23202321			<AddressTokens<T>>::insert(collection_id, owner.as_sub(), list);2322		} else {2323			let itm = vec![item_index];2324			<AddressTokens<T>>::insert(collection_id, owner.as_sub(), itm);2325		}23262327		Ok(())2328	}23292330	fn remove_token_index(2331		collection_id: CollectionId,2332		item_index: TokenId,2333		owner: &T::CrossAccountId,2334	) -> DispatchResult {2335		// update counter2336		<AccountItemCount<T>>::insert(2337			owner.as_sub(),2338			<AccountItemCount<T>>::get(owner.as_sub())2339				.checked_sub(1)2340				.ok_or(Error::<T>::NumOverflow)?,2341		);23422343		let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner.as_sub());2344		if list_exists {2345			let mut list = <AddressTokens<T>>::get(collection_id, owner.as_sub());2346			let item_contains = list.contains(&item_index.clone());23472348			if item_contains {2349				list.retain(|&item| item != item_index);2350				<AddressTokens<T>>::insert(collection_id, owner.as_sub(), list);2351			}2352		}23532354		Ok(())2355	}23562357	fn move_token_index(2358		collection_id: CollectionId,2359		item_index: TokenId,2360		old_owner: &T::CrossAccountId,2361		new_owner: &T::CrossAccountId,2362	) -> DispatchResult {2363		Self::remove_token_index(collection_id, item_index, old_owner)?;2364		Self::add_token_index(collection_id, item_index, new_owner)?;23652366		Ok(())2367	}2368}23692370sp_api::decl_runtime_apis! {2371	pub trait NftApi {2372		/// Used for ethereum integration2373		fn eth_contract_code(account: H160) -> Option<Vec<u8>>;2374	}2375}