git.delta.rocks / unique-network / refs/commits / 75e888b5af30

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"]78#![cfg_attr(not(feature = "std"), no_std)]910#[cfg(feature = "std")]11pub use std::*;1213#[cfg(feature = "std")]14pub use serde::*;1516use codec::{Decode, Encode};17pub use frame_support::{18    construct_runtime, decl_event, decl_module, decl_storage, decl_error,19    dispatch::DispatchResult,20    ensure, fail, parameter_types,21    traits::{22        Currency, ExistenceRequirement, Get, Imbalance, KeyOwnerProofSystem, OnUnbalanced,23        Randomness, IsSubType, WithdrawReasons,24    },25    weights::{26        constants::{BlockExecutionWeight, ExtrinsicBaseWeight, RocksDbWeight, WEIGHT_PER_SECOND},27        DispatchInfo, GetDispatchInfo, IdentityFee, Pays, PostDispatchInfo, Weight,28        WeightToFeePolynomial, DispatchClass,29    },30    StorageValue,31    transactional,32};3334use frame_system::{self as system, ensure_signed, ensure_root};35use sp_runtime::sp_std::prelude::Vec;36use core::ops::{Deref, DerefMut};37use nft_data_structs::{38    MAX_DECIMAL_POINTS, MAX_SPONSOR_TIMEOUT, MAX_TOKEN_OWNERSHIP, MAX_REFUNGIBLE_PIECES,39	AccessMode, ChainLimits, Collection, CreateItemData, CollectionLimits,40    CollectionId, CollectionMode, TokenId, 41    SchemaVersion, SponsorshipState, Ownership,42    NftItemType, FungibleItemType, ReFungibleItemType43};4445#[cfg(test)]46mod mock;4748#[cfg(test)]49mod tests;5051mod default_weights;5253#[cfg(feature = "runtime-benchmarks")]54mod benchmarking;5556pub trait WeightInfo {57	fn create_collection() -> Weight;58	fn destroy_collection() -> Weight;59	fn add_to_white_list() -> Weight;60	fn remove_from_white_list() -> Weight;61    fn set_public_access_mode() -> Weight;62    fn set_mint_permission() -> Weight;63    fn change_collection_owner() -> Weight;64    fn add_collection_admin() -> Weight;65    fn remove_collection_admin() -> Weight;66    fn set_collection_sponsor() -> Weight;67    fn confirm_sponsorship() -> Weight;68    fn remove_collection_sponsor() -> Weight;69    fn create_item(s: usize) -> Weight;70    fn burn_item() -> Weight;71    fn transfer() -> Weight;72    fn approve() -> Weight;73    fn transfer_from() -> Weight;74    fn set_offchain_schema() -> Weight;75    fn set_const_on_chain_schema() -> Weight;76    fn set_variable_on_chain_schema() -> Weight;77    fn set_variable_meta_data() -> Weight;78    fn enable_contract_sponsoring() -> Weight;79    fn set_schema_version() -> Weight;80    fn set_chain_limits() -> Weight;81    fn set_contract_sponsoring_rate_limit() -> Weight;82    fn set_variable_meta_data_sponsoring_rate_limit() -> Weight;83    fn toggle_contract_white_list() -> Weight;84    fn add_to_contract_white_list() -> Weight;85    fn remove_from_contract_white_list() -> Weight;86    fn set_collection_limits() -> Weight;87}8889decl_error! {90	/// Error for non-fungible-token module.91	pub enum Error for Module<T: Config> {92        /// Total collections bound exceeded.93        TotalCollectionsLimitExceeded,94		/// Decimal_points parameter must be lower than MAX_DECIMAL_POINTS constant, currently it is 30.95        CollectionDecimalPointLimitExceeded, 96        /// Collection name can not be longer than 63 char.97        CollectionNameLimitExceeded, 98        /// Collection description can not be longer than 255 char.99        CollectionDescriptionLimitExceeded, 100        /// Token prefix can not be longer than 15 char.101        CollectionTokenPrefixLimitExceeded,102        /// This collection does not exist.103        CollectionNotFound,104        /// Item not exists.105        TokenNotFound,106        /// Admin not found107        AdminNotFound,108        /// Arithmetic calculation overflow.109        NumOverflow,       110        /// Account already has admin role.111        AlreadyAdmin,  112        /// You do not own this collection.113        NoPermission,114        /// This address is not set as sponsor, use setCollectionSponsor first.115        ConfirmUnsetSponsorFail,116        /// Collection is not in mint mode.117        PublicMintingNotAllowed,118        /// Sender parameter and item owner must be equal.119        MustBeTokenOwner,120        /// Item balance not enough.121        TokenValueTooLow,122        /// Size of item is too large.123        NftSizeLimitExceeded,124        /// No approve found125        ApproveNotFound,126        /// Requested value more than approved.127        TokenValueNotEnough,128        /// Only approved addresses can call this method.129        ApproveRequired,130        /// Address is not in white list.131        AddresNotInWhiteList,132        /// Number of collection admins bound exceeded.133        CollectionAdminsLimitExceeded,134        /// Owned tokens by a single address bound exceeded.135        AddressOwnershipLimitExceeded,136        /// Length of items properties must be greater than 0.137        EmptyArgument,138        /// const_data exceeded data limit.139        TokenConstDataLimitExceeded,140        /// variable_data exceeded data limit.141        TokenVariableDataLimitExceeded,142        /// Not NFT item data used to mint in NFT collection.143        NotNftDataUsedToMintNftCollectionToken,144        /// Not Fungible item data used to mint in Fungible collection.145        NotFungibleDataUsedToMintFungibleCollectionToken,146        /// Not Re Fungible item data used to mint in Re Fungible collection.147        NotReFungibleDataUsedToMintReFungibleCollectionToken,148        /// Unexpected collection type.149        UnexpectedCollectionType,150        /// Can't store metadata in fungible tokens.151        CantStoreMetadataInFungibleTokens,152        /// Collection token limit exceeded153        CollectionTokenLimitExceeded,154        /// Account token limit exceeded per collection155        AccountTokenLimitExceeded,156        /// Collection limit bounds per collection exceeded157        CollectionLimitBoundsExceeded,158        /// Tried to enable permissions which are only permitted to be disabled159        OwnerPermissionsCantBeReverted,160        /// Schema data size limit bound exceeded161        SchemaDataLimitExceeded,162        /// Maximum refungibility exceeded163        WrongRefungiblePieces,164        /// createRefungible should be called with one owner165        BadCreateRefungibleCall,166	}167}168169pub struct CollectionHandle<T: system::Config> {170    pub id: CollectionId,171    pub collection: Collection<T>,172}173174impl<T: frame_system::Config> Deref for CollectionHandle<T> {175    type Target = Collection<T>;176177    fn deref(&self) -> &Self::Target {178        &self.collection179    }180}181182impl<T: frame_system::Config> DerefMut for CollectionHandle<T> {183    fn deref_mut(&mut self) -> &mut Self::Target {184        &mut self.collection185    }186}187188pub trait Config: system::Config + Sized {189    type Event: From<Event<Self>> + Into<<Self as system::Config>::Event>;190191    /// Weight information for extrinsics in this pallet.192	type WeightInfo: WeightInfo;193194    type Currency: Currency<Self::AccountId>;195    type CollectionCreationPrice: Get<<<Self as Config>::Currency as Currency<Self::AccountId>>::Balance>;196    type TreasuryAccountId: Get<Self::AccountId>;197}198199// # Used definitions200//201// ## User control levels202//203// chain-controlled - key is uncontrolled by user204//                    i.e autoincrementing index205//                    can use non-cryptographic hash206// real - key is controlled by user207//        but it is hard to generate enough colliding values, i.e owner of signed txs208//        can use non-cryptographic hash209// controlled - key is completly controlled by users210//              i.e maps with mutable keys211//              should use cryptographic hash212//213// ## User control level downgrade reasons214//215// ?1 - chain-controlled -> controlled216//      collections/tokens can be destroyed, resulting in massive holes217// ?2 - chain-controlled -> controlled218//      same as ?1, but can be only added, resulting in easier exploitation219// ?3 - real -> controlled220//      no confirmation required, so addresses can be easily generated221decl_storage! {222    trait Store for Module<T: Config> as Nft {223224        //#region Private members225        /// Id of next collection226        CreatedCollectionCount: u32;227        /// Used for migrations228        ChainVersion: u64;229        /// Id of last collection token230        /// Collection id (controlled?1)231        ItemListIndex: map hasher(blake2_128_concat) CollectionId => TokenId;232        //#endregion233234        //#region Chain limits struct235        pub ChainLimit get(fn chain_limit) config(): ChainLimits;236        //#endregion237238        //#region Bound counters239        /// Amount of collections destroyed, used for total amount tracking with240        /// CreatedCollectionCount241        DestroyedCollectionCount: u32;242        /// Total amount of account owned tokens (NFTs + RFTs + unique fungibles)243        /// Account id (real)244        pub AccountItemCount get(fn account_item_count): map hasher(twox_64_concat) T::AccountId => u32;245        //#endregion246247        //#region Basic collections248        /// Collection info249        /// Collection id (controlled?1)250        pub CollectionById get(fn collection_id) config(): map hasher(blake2_128_concat) CollectionId => Option<Collection<T>> = None;251        /// List of collection admins252        /// Collection id (controlled?2)253        pub AdminList get(fn admin_list_collection): map hasher(blake2_128_concat) CollectionId => Vec<T::AccountId>;254        /// Whitelisted collection users255        /// Collection id (controlled?2), user id (controlled?3)256        pub WhiteList get(fn white_list): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) T::AccountId => bool;257        //#endregion258259        /// How many of collection items user have260        /// Collection id (controlled?2), account id (real)261        pub Balance get(fn balance_count): double_map hasher(blake2_128_concat) CollectionId, hasher(twox_64_concat) T::AccountId => u128;262263        /// Amount of items which spender can transfer out of owners account (via transferFrom)264        /// Collection id (controlled?2), (token id (controlled ?2) + owner account id (real) + spender account id (controlled?3))265        /// TODO: Off chain worker should remove from this map when token gets removed266        pub Allowances get(fn approved): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) (TokenId, T::AccountId, T::AccountId) => u128;267268        //#region Item collections269        /// Collection id (controlled?2), token id (controlled?1)270        pub NftItemList get(fn nft_item_id) config(): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => Option<NftItemType<T::AccountId>>;271        /// Collection id (controlled?2), owner (controlled?2)272        pub FungibleItemList get(fn fungible_item_id) config(): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) T::AccountId => FungibleItemType;273        /// Collection id (controlled?2), token id (controlled?1)274        pub ReFungibleItemList get(fn refungible_item_id) config(): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => Option<ReFungibleItemType<T::AccountId>>;275        //#endregion276277        //#region Index list278        /// Collection id (controlled?2), tokens owner (controlled?2)279        pub AddressTokens get(fn address_tokens): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) T::AccountId => Vec<TokenId>;280        //#endregion281282        //#region Tokens transfer rate limit baskets283        /// (Collection id (controlled?2), who created (real))284        /// TODO: Off chain worker should remove from this map when collection gets removed285        pub CreateItemBasket get(fn create_item_basket): map hasher(blake2_128_concat) (CollectionId, T::AccountId) => T::BlockNumber;286        /// Collection id (controlled?2), token id (controlled?2)287        pub NftTransferBasket get(fn nft_transfer_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => T::BlockNumber;288        /// Collection id (controlled?2), owning user (real)289        pub FungibleTransferBasket get(fn fungible_transfer_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(twox_64_concat) T::AccountId => T::BlockNumber;290        /// Collection id (controlled?2), token id (controlled?2)291        pub ReFungibleTransferBasket get(fn refungible_transfer_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => T::BlockNumber;292        //#endregion293294        /// Variable metadata sponsoring295        /// Collection id (controlled?2), token id (controlled?2)296        pub VariableMetaDataBasket get(fn variable_meta_data_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => Option<T::BlockNumber> = None;297      298        //#region Contract Sponsorship and Ownership299        /// Contract address (real)300        pub ContractOwner get(fn contract_owner): map hasher(twox_64_concat) T::AccountId => Option<T::AccountId>;301        /// Contract address (real)302        pub ContractSelfSponsoring get(fn contract_self_sponsoring): map hasher(twox_64_concat) T::AccountId => bool;303        /// (Contract address(real), caller (real))304        pub ContractSponsorBasket get(fn contract_sponsor_basket): map hasher(twox_64_concat) (T::AccountId, T::AccountId) => T::BlockNumber;305        /// Contract address (real)306        pub ContractSponsoringRateLimit get(fn contract_sponsoring_rate_limit): map hasher(twox_64_concat) T::AccountId => T::BlockNumber;307        /// Contract address (real)308        pub ContractWhiteListEnabled get(fn contract_white_list_enabled): map hasher(twox_64_concat) T::AccountId => bool; 309        /// Contract address (real) => Whitelisted user (controlled?3)310        pub ContractWhiteList get(fn contract_white_list): double_map hasher(twox_64_concat) T::AccountId, hasher(blake2_128_concat) T::AccountId => bool; 311        //#endregion312    }313    add_extra_genesis {314        build(|config: &GenesisConfig<T>| {315            // Modification of storage316            for (_num, _c) in &config.collection_id {317                <Module<T>>::init_collection(_c);318            }319320            for (_num, _c, _i) in &config.nft_item_id {321                <Module<T>>::init_nft_token(*_c, _i);322            }323324            for (collection_id, account_id, fungible_item) in &config.fungible_item_id {325                <Module<T>>::init_fungible_token(*collection_id, account_id, fungible_item);326            }327328            for (_num, _c, _i) in &config.refungible_item_id {329                <Module<T>>::init_refungible_token(*_c, _i);330            }331        })332    }333}334335decl_event!(336    pub enum Event<T>337    where338        AccountId = <T as system::Config>::AccountId,339    {340        /// New collection was created341        /// 342        /// # Arguments343        /// 344        /// * collection_id: Globally unique identifier of newly created collection.345        /// 346        /// * mode: [CollectionMode] converted into u8.347        /// 348        /// * account_id: Collection owner.349        CollectionCreated(CollectionId, u8, AccountId),350351        /// New item was created.352        /// 353        /// # Arguments354        /// 355        /// * collection_id: Id of the collection where item was created.356        /// 357        /// * item_id: Id of an item. Unique within the collection.358        ///359        /// * recipient: Owner of newly created item 360        ItemCreated(CollectionId, TokenId, AccountId),361362        /// Collection item was burned.363        /// 364        /// # Arguments365        /// 366        /// collection_id.367        /// 368        /// item_id: Identifier of burned NFT.369        ItemDestroyed(CollectionId, TokenId),370371        /// Item was transferred372        ///373        /// * collection_id: Id of collection to which item is belong374        ///375        /// * item_id: Id of an item376        ///377        /// * sender: Original owner of item378        ///379        /// * recipient: New owner of item380        ///381        /// * amount: Always 1 for NFT382        Transfer(CollectionId, TokenId, AccountId, AccountId, u128),383384        /// * collection_id385        ///386        /// * item_id387        ///388        /// * sender389        ///390        /// * spender391        ///392        /// * amount393        Approved(CollectionId, TokenId, AccountId, AccountId, u128),394    }395);396397decl_module! {398    pub struct Module<T: Config> for enum Call 399    where 400        origin: T::Origin401    {402        fn deposit_event() = default;403        type Error = Error<T>;404405        fn on_initialize(_now: T::BlockNumber) -> Weight {406            0407        }408409        /// 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.410        /// 411        /// # Permissions412        /// 413        /// * Anyone.414        /// 415        /// # Arguments416        /// 417        /// * collection_name: UTF-16 string with collection name (limit 64 characters), will be stored as zero-terminated.418        /// 419        /// * collection_description: UTF-16 string with collection description (limit 256 characters), will be stored as zero-terminated.420        /// 421        /// * token_prefix: UTF-8 string with token prefix.422        /// 423        /// * mode: [CollectionMode] collection type and type dependent data.424        // returns collection ID425        #[weight = <T as Config>::WeightInfo::create_collection()]426        #[transactional]427        pub fn create_collection(origin,428                                 collection_name: Vec<u16>,429                                 collection_description: Vec<u16>,430                                 token_prefix: Vec<u8>,431                                 mode: CollectionMode) -> DispatchResult {432433            // Anyone can create a collection434            let who = ensure_signed(origin)?;435436            // Take a (non-refundable) deposit of collection creation437            let mut imbalance = <<<T as Config>::Currency as Currency<T::AccountId>>::PositiveImbalance>::zero();438            imbalance.subsume(<<T as Config>::Currency as Currency<T::AccountId>>::deposit_creating(439                &T::TreasuryAccountId::get(),440                T::CollectionCreationPrice::get(),441            ));442            <T as Config>::Currency::settle(443                &who,444                imbalance,445                WithdrawReasons::TRANSFER,446                ExistenceRequirement::KeepAlive,447            ).map_err(|_| Error::<T>::NoPermission)?;448449            let decimal_points = match mode {450                CollectionMode::Fungible(points) => points,451                _ => 0452            };453454            let chain_limit = ChainLimit::get();455456            let created_count = CreatedCollectionCount::get();457            let destroyed_count = DestroyedCollectionCount::get();458459            // bound Total number of collections460            ensure!(created_count - destroyed_count < chain_limit.collection_numbers_limit, Error::<T>::TotalCollectionsLimitExceeded);461462            // check params463            ensure!(decimal_points <= MAX_DECIMAL_POINTS, Error::<T>::CollectionDecimalPointLimitExceeded);464            ensure!(collection_name.len() <= 64, Error::<T>::CollectionNameLimitExceeded);465            ensure!(collection_description.len() <= 256, Error::<T>::CollectionDescriptionLimitExceeded);466            ensure!(token_prefix.len() <= 16, Error::<T>::CollectionTokenPrefixLimitExceeded);467468            // Generate next collection ID469            let next_id = created_count470                .checked_add(1)471                .ok_or(Error::<T>::NumOverflow)?;472473            CreatedCollectionCount::put(next_id);474475            let limits = CollectionLimits {476                sponsored_data_size: chain_limit.custom_data_limit,477                ..Default::default()478            };479480            // Create new collection481            let new_collection = Collection {482                owner: who.clone(),483                name: collection_name,484                mode: mode.clone(),485                mint_mode: false,486                access: AccessMode::Normal,487                description: collection_description,488                decimal_points: decimal_points,489                token_prefix: token_prefix,490                offchain_schema: Vec::new(),491                schema_version: SchemaVersion::ImageURL,492                sponsorship: SponsorshipState::Disabled,493                variable_on_chain_schema: Vec::new(),494                const_on_chain_schema: Vec::new(),495                limits,496            };497498            // Add new collection to map499            <CollectionById<T>>::insert(next_id, new_collection);500501            // call event502            Self::deposit_event(RawEvent::CollectionCreated(next_id, mode.into(), who.clone()));503504            Ok(())505        }506507        /// **DANGEROUS**: Destroys collection and all NFTs within this collection. Users irrecoverably lose their assets and may lose real money.508        /// 509        /// # Permissions510        /// 511        /// * Collection Owner.512        /// 513        /// # Arguments514        /// 515        /// * collection_id: collection to destroy.516        #[weight = <T as Config>::WeightInfo::destroy_collection()]517        #[transactional]518        pub fn destroy_collection(origin, collection_id: CollectionId) -> DispatchResult {519520            let sender = ensure_signed(origin)?;521            let collection = Self::get_collection(collection_id)?;522            Self::check_owner_permissions(&collection, sender)?;523            if !collection.limits.owner_can_destroy {524                fail!(Error::<T>::NoPermission);525            }526527            <AddressTokens<T>>::remove_prefix(collection_id);528            <Allowances<T>>::remove_prefix(collection_id);529            <Balance<T>>::remove_prefix(collection_id);530            <ItemListIndex>::remove(collection_id);531            <AdminList<T>>::remove(collection_id);532            <CollectionById<T>>::remove(collection_id);533            <WhiteList<T>>::remove_prefix(collection_id);534535            <NftItemList<T>>::remove_prefix(collection_id);536            <FungibleItemList<T>>::remove_prefix(collection_id);537            <ReFungibleItemList<T>>::remove_prefix(collection_id);538539            <NftTransferBasket<T>>::remove_prefix(collection_id);540            <FungibleTransferBasket<T>>::remove_prefix(collection_id);541            <ReFungibleTransferBasket<T>>::remove_prefix(collection_id);542543            <VariableMetaDataBasket<T>>::remove_prefix(collection_id);544545            DestroyedCollectionCount::put(DestroyedCollectionCount::get()546                .checked_add(1)547                .ok_or(Error::<T>::NumOverflow)?);548549            Ok(())550        }551552        /// Add an address to white list.553        /// 554        /// # Permissions555        /// 556        /// * Collection Owner557        /// * Collection Admin558        /// 559        /// # Arguments560        /// 561        /// * collection_id.562        /// 563        /// * address.564        #[weight = <T as Config>::WeightInfo::add_to_white_list()]565        #[transactional]566        pub fn add_to_white_list(origin, collection_id: CollectionId, address: T::AccountId) -> DispatchResult{567568            let sender = ensure_signed(origin)?;569            let collection = Self::get_collection(collection_id)?;570            Self::check_owner_or_admin_permissions(&collection, sender)?;571572            <WhiteList<T>>::insert(collection_id, address, true);573            574            Ok(())575        }576577        /// Remove an address from white list.578        /// 579        /// # Permissions580        /// 581        /// * Collection Owner582        /// * Collection Admin583        /// 584        /// # Arguments585        /// 586        /// * collection_id.587        /// 588        /// * address.589        #[weight = <T as Config>::WeightInfo::remove_from_white_list()]590        #[transactional]591        pub fn remove_from_white_list(origin, collection_id: CollectionId, address: T::AccountId) -> DispatchResult{592593            let sender = ensure_signed(origin)?;594            let collection = Self::get_collection(collection_id)?;595            Self::check_owner_or_admin_permissions(&collection, sender)?;596597            <WhiteList<T>>::remove(collection_id, address);598599            Ok(())600        }601602        /// Toggle between normal and white list access for the methods with access for `Anyone`.603        /// 604        /// # Permissions605        /// 606        /// * Collection Owner.607        /// 608        /// # Arguments609        /// 610        /// * collection_id.611        /// 612        /// * mode: [AccessMode]613        #[weight = <T as Config>::WeightInfo::set_public_access_mode()]614        #[transactional]615        pub fn set_public_access_mode(origin, collection_id: CollectionId, mode: AccessMode) -> DispatchResult616        {617            let sender = ensure_signed(origin)?;618619            let mut target_collection = Self::get_collection(collection_id)?;620            Self::check_owner_permissions(&target_collection, sender)?;621            target_collection.access = mode;622            Self::save_collection(target_collection);623624            Ok(())625        }626627        /// Allows Anyone to create tokens if:628        /// * White List is enabled, and629        /// * Address is added to white list, and630        /// * This method was called with True parameter631        /// 632        /// # Permissions633        /// * Collection Owner634        ///635        /// # Arguments636        /// 637        /// * collection_id.638        /// 639        /// * mint_permission: Boolean parameter. If True, allows minting to Anyone with conditions above.640        #[weight = <T as Config>::WeightInfo::set_mint_permission()]641        #[transactional]642        pub fn set_mint_permission(origin, collection_id: CollectionId, mint_permission: bool) -> DispatchResult643        {644            let sender = ensure_signed(origin)?;645646            let mut target_collection = Self::get_collection(collection_id)?;647            Self::check_owner_permissions(&target_collection, sender)?;648            target_collection.mint_mode = mint_permission;649            Self::save_collection(target_collection);650651            Ok(())652        }653654        /// Change the owner of the collection.655        /// 656        /// # Permissions657        /// 658        /// * Collection Owner.659        /// 660        /// # Arguments661        /// 662        /// * collection_id.663        /// 664        /// * new_owner.665        #[weight = <T as Config>::WeightInfo::change_collection_owner()]666        #[transactional]667        pub fn change_collection_owner(origin, collection_id: CollectionId, new_owner: T::AccountId) -> DispatchResult {668669            let sender = ensure_signed(origin)?;670            let mut target_collection = Self::get_collection(collection_id)?;671            Self::check_owner_permissions(&target_collection, sender)?;672            target_collection.owner = new_owner;673            Self::save_collection(target_collection);674675            Ok(())676        }677678        /// Adds an admin of the Collection.679        /// 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. 680        /// 681        /// # Permissions682        /// 683        /// * Collection Owner.684        /// * Collection Admin.685        /// 686        /// # Arguments687        /// 688        /// * collection_id: ID of the Collection to add admin for.689        /// 690        /// * new_admin_id: Address of new admin to add.691        #[weight = <T as Config>::WeightInfo::add_collection_admin()]692        #[transactional]693        pub fn add_collection_admin(origin, collection_id: CollectionId, new_admin_id: T::AccountId) -> DispatchResult {694695            let sender = ensure_signed(origin)?;696            let collection = Self::get_collection(collection_id)?;697            Self::check_owner_or_admin_permissions(&collection, sender)?;698            let mut admin_arr = <AdminList<T>>::get(collection_id);699700            match admin_arr.binary_search(&new_admin_id) {701                Ok(_) => {},702                Err(idx) => {703                    let limits = ChainLimit::get();704                    ensure!(admin_arr.len() < limits.collections_admins_limit as usize, Error::<T>::CollectionAdminsLimitExceeded);705                    admin_arr.insert(idx, new_admin_id);706                    <AdminList<T>>::insert(collection_id, admin_arr);707                }708            }709            Ok(())710        }711712        /// 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.713        ///714        /// # Permissions715        /// 716        /// * Collection Owner.717        /// * Collection Admin.718        /// 719        /// # Arguments720        /// 721        /// * collection_id: ID of the Collection to remove admin for.722        /// 723        /// * account_id: Address of admin to remove.724        #[weight = <T as Config>::WeightInfo::remove_collection_admin()]725        #[transactional]726        pub fn remove_collection_admin(origin, collection_id: CollectionId, account_id: T::AccountId) -> DispatchResult {727728            let sender = 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(&account_id) {734                Ok(idx) => {735                    admin_arr.remove(idx);736                    <AdminList<T>>::insert(collection_id, admin_arr);737                },738                Err(_) => {}739            }740            Ok(())741        }742743        /// # Permissions744        /// 745        /// * Collection Owner746        /// 747        /// # Arguments748        /// 749        /// * collection_id.750        /// 751        /// * new_sponsor.752        #[weight = <T as Config>::WeightInfo::set_collection_sponsor()]753        #[transactional]754        pub fn set_collection_sponsor(origin, collection_id: CollectionId, new_sponsor: T::AccountId) -> DispatchResult {755756            let sender = ensure_signed(origin)?;757            let mut target_collection = Self::get_collection(collection_id)?;758            Self::check_owner_permissions(&target_collection, sender)?;759760            target_collection.sponsorship = SponsorshipState::Unconfirmed(new_sponsor);761            Self::save_collection(target_collection);762763            Ok(())764        }765766        /// # Permissions767        /// 768        /// * Sponsor.769        /// 770        /// # Arguments771        /// 772        /// * collection_id.773        #[weight = <T as Config>::WeightInfo::confirm_sponsorship()]774        #[transactional]775        pub fn confirm_sponsorship(origin, collection_id: CollectionId) -> DispatchResult {776777            let sender = ensure_signed(origin)?;778779            let mut target_collection = Self::get_collection(collection_id)?;780            ensure!(781                target_collection.sponsorship.pending_sponsor() == Some(&sender),782                Error::<T>::ConfirmUnsetSponsorFail783            );784785            target_collection.sponsorship = SponsorshipState::Confirmed(sender);786            Self::save_collection(target_collection);787788            Ok(())789        }790791        /// Switch back to pay-per-own-transaction model.792        ///793        /// # Permissions794        ///795        /// * Collection owner.796        /// 797        /// # Arguments798        /// 799        /// * collection_id.800        #[weight = <T as Config>::WeightInfo::remove_collection_sponsor()]801        #[transactional]802        pub fn remove_collection_sponsor(origin, collection_id: CollectionId) -> DispatchResult {803804            let sender = ensure_signed(origin)?;805806            let mut target_collection = Self::get_collection(collection_id)?;807            Self::check_owner_permissions(&target_collection, sender)?;808809            target_collection.sponsorship = SponsorshipState::Disabled;810            Self::save_collection(target_collection);811812            Ok(())813        }814815        /// This method creates a concrete instance of NFT Collection created with CreateCollection method.816        /// 817        /// # Permissions818        /// 819        /// * Collection Owner.820        /// * Collection Admin.821        /// * Anyone if822        ///     * White List is enabled, and823        ///     * Address is added to white list, and824        ///     * MintPermission is enabled (see SetMintPermission method)825        /// 826        /// # Arguments827        /// 828        /// * collection_id: ID of the collection.829        /// 830        /// * owner: Address, initial owner of the NFT.831        ///832        /// * data: Token data to store on chain.833        // #[weight =834        // (130_000_000 as Weight)835        // .saturating_add((2135 as Weight).saturating_mul((properties.len() as u64) as Weight))836        // .saturating_add(RocksDbWeight::get().reads(10 as Weight))837        // .saturating_add(RocksDbWeight::get().writes(8 as Weight))]838839        #[weight = <T as Config>::WeightInfo::create_item(data.len())]840        #[transactional]841        pub fn create_item(origin, collection_id: CollectionId, owner: T::AccountId, data: CreateItemData) -> DispatchResult {842            let sender = ensure_signed(origin)?;843            Self::create_item_internal(sender, collection_id, owner, data)844        }845846        /// This method creates multiple items in a collection created with CreateCollection method.847        /// 848        /// # Permissions849        /// 850        /// * Collection Owner.851        /// * Collection Admin.852        /// * Anyone if853        ///     * White List is enabled, and854        ///     * Address is added to white list, and855        ///     * MintPermission is enabled (see SetMintPermission method)856        /// 857        /// # Arguments858        /// 859        /// * collection_id: ID of the collection.860        /// 861        /// * itemsData: Array items properties. Each property is an array of bytes itself, see [create_item].862        /// 863        /// * owner: Address, initial owner of the NFT.864        #[weight = <T as Config>::WeightInfo::create_item(items_data.into_iter()865                               .map(|data| { data.len() })866                               .sum())]867        #[transactional]868        pub fn create_multiple_items(origin, collection_id: CollectionId, owner: T::AccountId, items_data: Vec<CreateItemData>) -> DispatchResult {869870            ensure!(items_data.len() > 0, Error::<T>::EmptyArgument);871            let sender = ensure_signed(origin)?;872873            let target_collection = Self::get_collection(collection_id)?;874875            Self::can_create_items_in_collection(&target_collection, &sender, &owner, items_data.len() as u32)?;876877            for data in &items_data {878                Self::validate_create_item_args(&target_collection, data)?;879            }880            for data in &items_data {881                Self::create_item_no_validation(&target_collection, owner.clone(), data.clone())?;882            }883884            Ok(())885        }886887        /// Destroys a concrete instance of NFT.888        /// 889        /// # Permissions890        /// 891        /// * Collection Owner.892        /// * Collection Admin.893        /// * Current NFT Owner.894        /// 895        /// # Arguments896        /// 897        /// * collection_id: ID of the collection.898        /// 899        /// * item_id: ID of NFT to burn.900        #[weight = <T as Config>::WeightInfo::burn_item()]901        #[transactional]902        pub fn burn_item(origin, collection_id: CollectionId, item_id: TokenId, value: u128) -> DispatchResult {903904            let sender = ensure_signed(origin)?;905906            // Transfer permissions check907            let target_collection = Self::get_collection(collection_id)?;908            ensure!(909                Self::is_item_owner(sender.clone(), &target_collection, item_id) ||910                (911                    target_collection.limits.owner_can_transfer &&912                    Self::is_owner_or_admin_permissions(&target_collection, sender.clone())913                ),914                Error::<T>::NoPermission915            );916917            if target_collection.access == AccessMode::WhiteList {918                Self::check_white_list(&target_collection, &sender)?;919            }920921            match target_collection.mode922            {923                CollectionMode::NFT => Self::burn_nft_item(&target_collection, item_id)?,924                CollectionMode::Fungible(_)  => Self::burn_fungible_item(&sender, &target_collection, value)?,925                CollectionMode::ReFungible  => Self::burn_refungible_item(&target_collection, item_id, &sender)?,926                _ => ()927            };928929            // call event930            Self::deposit_event(RawEvent::ItemDestroyed(target_collection.id, item_id));931932            Ok(())933        }934935        /// Change ownership of the token.936        /// 937        /// # Permissions938        /// 939        /// * Collection Owner940        /// * Collection Admin941        /// * Current NFT owner942        ///943        /// # Arguments944        /// 945        /// * recipient: Address of token recipient.946        /// 947        /// * collection_id.948        /// 949        /// * item_id: ID of the item950        ///     * Non-Fungible Mode: Required.951        ///     * Fungible Mode: Ignored.952        ///     * Re-Fungible Mode: Required.953        /// 954        /// * value: Amount to transfer.955        ///     * Non-Fungible Mode: Ignored956        ///     * Fungible Mode: Must specify transferred amount957        ///     * Re-Fungible Mode: Must specify transferred portion (between 0 and 1)958        #[weight = <T as Config>::WeightInfo::transfer()]959        #[transactional]960        pub fn transfer(origin, recipient: T::AccountId, collection_id: CollectionId, item_id: TokenId, value: u128) -> DispatchResult {961            let sender = ensure_signed(origin)?;962            let collection = Self::get_collection(collection_id)?;963964            Self::transfer_internal(sender, recipient, &collection, item_id, value)965        }966967        /// Set, change, or remove approved address to transfer the ownership of the NFT.968        /// 969        /// # Permissions970        /// 971        /// * Collection Owner972        /// * Collection Admin973        /// * Current NFT owner974        /// 975        /// # Arguments976        /// 977        /// * approved: Address that is approved to transfer this NFT or zero (if needed to remove approval).978        /// 979        /// * collection_id.980        /// 981        /// * item_id: ID of the item.982        #[weight = <T as Config>::WeightInfo::approve()]983        #[transactional]984        pub fn approve(origin, spender: T::AccountId, collection_id: CollectionId, item_id: TokenId, amount: u128) -> DispatchResult {985986            let sender = ensure_signed(origin)?;987            let target_collection = Self::get_collection(collection_id)?;988989            Self::token_exists(&target_collection, item_id)?;990991            // Transfer permissions check992            let bypasses_limits = target_collection.limits.owner_can_transfer &&993                Self::is_owner_or_admin_permissions(994                    &target_collection,995                    sender.clone(),996                );997998            let allowance_limit = if bypasses_limits {999                None1000            } else if let Some(amount) = Self::owned_amount(1001                sender.clone(),1002                &target_collection,1003                item_id,1004            ) {1005                Some(amount)1006            } else {1007                fail!(Error::<T>::NoPermission);1008            };10091010            if target_collection.access == AccessMode::WhiteList {1011                Self::check_white_list(&target_collection, &sender)?;1012                Self::check_white_list(&target_collection, &spender)?;1013            }10141015            let allowance: u128 = amount1016                .checked_add(<Allowances<T>>::get(collection_id, (item_id, &sender, &spender)))1017                .ok_or(Error::<T>::NumOverflow)?;1018            if let Some(limit) = allowance_limit {1019                ensure!(limit >= allowance, Error::<T>::TokenValueTooLow);1020            }1021            <Allowances<T>>::insert(collection_id, (item_id, sender.clone(), spender.clone()), allowance);10221023            Self::deposit_event(RawEvent::Approved(target_collection.id, item_id, sender, spender, allowance));1024            Ok(())1025        }1026        1027        /// 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.1028        /// 1029        /// # Permissions1030        /// * Collection Owner1031        /// * Collection Admin1032        /// * Current NFT owner1033        /// * Address approved by current NFT owner1034        /// 1035        /// # Arguments1036        /// 1037        /// * from: Address that owns token.1038        /// 1039        /// * recipient: Address of token recipient.1040        /// 1041        /// * collection_id.1042        /// 1043        /// * item_id: ID of the item.1044        /// 1045        /// * value: Amount to transfer.1046        #[weight = <T as Config>::WeightInfo::transfer_from()]1047        #[transactional]1048        pub fn transfer_from(origin, from: T::AccountId, recipient: T::AccountId, collection_id: CollectionId, item_id: TokenId, value: u128 ) -> DispatchResult {10491050            let sender = ensure_signed(origin)?;1051            let target_collection = Self::get_collection(collection_id)?;10521053            // Check approval1054            let approval: u128 = <Allowances<T>>::get(collection_id, (item_id, &from, &sender));10551056            // Limits check1057            Self::is_correct_transfer(&target_collection, &recipient)?;10581059            // Transfer permissions check         1060            ensure!(1061                approval >= value || 1062                (1063                    target_collection.limits.owner_can_transfer &&1064                    Self::is_owner_or_admin_permissions(&target_collection, sender.clone())1065                ),1066                Error::<T>::NoPermission1067            );10681069            if target_collection.access == AccessMode::WhiteList {1070                Self::check_white_list(&target_collection, &sender)?;1071                Self::check_white_list(&target_collection, &recipient)?;1072            }10731074            // Reduce approval by transferred amount or remove if remaining approval drops to 01075            if approval.saturating_sub(value) > 0 {1076                <Allowances<T>>::insert(collection_id, (item_id, &from, &sender), approval - value);1077            }1078            else {1079                <Allowances<T>>::remove(collection_id, (item_id, &from, &sender));1080            }10811082            match target_collection.mode1083            {1084                CollectionMode::NFT => Self::transfer_nft(&target_collection, item_id, from.clone(), recipient.clone())?,1085                CollectionMode::Fungible(_)  => Self::transfer_fungible(&target_collection, value, &from, &recipient)?,1086                CollectionMode::ReFungible  => Self::transfer_refungible(&target_collection, item_id, value, from.clone(), recipient.clone())?,1087                _ => ()1088            };10891090            Self::deposit_event(RawEvent::Transfer(target_collection.id, item_id, from, recipient, value));1091            Ok(())1092        }10931094        // #[weight = 0]1095        // pub fn safe_transfer_from(origin, collection_id: CollectionId, item_id: TokenId, new_owner: T::AccountId) -> DispatchResult {10961097        //     // let no_perm_mes = "You do not have permissions to modify this collection";1098        //     // ensure!(<ApprovedList<T>>::contains_key((collection_id, item_id)), no_perm_mes);1099        //     // let list_itm = <ApprovedList<T>>::get((collection_id, item_id));1100        //     // ensure!(list_itm.contains(&new_owner.clone()), no_perm_mes);11011102        //     // // on_nft_received  call11031104        //     // Self::transfer(origin, collection_id, item_id, new_owner)?;11051106        //     Ok(())1107        // }11081109        /// Set off-chain data schema.1110        /// 1111        /// # Permissions1112        /// 1113        /// * Collection Owner1114        /// * Collection Admin1115        /// 1116        /// # Arguments1117        /// 1118        /// * collection_id.1119        /// 1120        /// * schema: String representing the offchain data schema.1121        #[weight = <T as Config>::WeightInfo::set_variable_meta_data()]1122        #[transactional]1123        pub fn set_variable_meta_data (1124            origin,1125            collection_id: CollectionId,1126            item_id: TokenId,1127            data: Vec<u8>1128        ) -> DispatchResult {1129            let sender = ensure_signed(origin)?;1130            1131            let target_collection = Self::get_collection(collection_id)?;1132            Self::token_exists(&target_collection, item_id)?;11331134            ensure!(ChainLimit::get().custom_data_limit >= data.len() as u32, Error::<T>::TokenVariableDataLimitExceeded);11351136            // Modify permissions check1137            ensure!(Self::is_item_owner(sender.clone(), &target_collection, item_id) ||1138                Self::is_owner_or_admin_permissions(&target_collection, sender.clone()),1139                Error::<T>::NoPermission);11401141            match target_collection.mode1142            {1143                CollectionMode::NFT => Self::set_nft_variable_data(&target_collection, item_id, data)?,1144                CollectionMode::ReFungible  => Self::set_re_fungible_variable_data(&target_collection, item_id, data)?,1145                CollectionMode::Fungible(_) => fail!(Error::<T>::CantStoreMetadataInFungibleTokens),1146                _ => fail!(Error::<T>::UnexpectedCollectionType)1147            };11481149            Ok(())1150        }1151 1152        /// Set schema standard1153        /// ImageURL1154        /// Unique1155        /// 1156        /// # Permissions1157        /// 1158        /// * Collection Owner1159        /// * Collection Admin1160        /// 1161        /// # Arguments1162        /// 1163        /// * collection_id.1164        /// 1165        /// * schema: SchemaVersion: enum1166        #[weight = <T as Config>::WeightInfo::set_schema_version()]1167        #[transactional]1168        pub fn set_schema_version(1169            origin,1170            collection_id: CollectionId,1171            version: SchemaVersion1172        ) -> DispatchResult {1173            let sender = ensure_signed(origin)?;1174            let mut target_collection = Self::get_collection(collection_id)?;1175            Self::check_owner_or_admin_permissions(&target_collection, sender.clone())?;1176            target_collection.schema_version = version;1177            Self::save_collection(target_collection);11781179            Ok(())1180        }11811182        /// Set off-chain data schema.1183        /// 1184        /// # Permissions1185        /// 1186        /// * Collection Owner1187        /// * Collection Admin1188        /// 1189        /// # Arguments1190        /// 1191        /// * collection_id.1192        /// 1193        /// * schema: String representing the offchain data schema.1194        #[weight = <T as Config>::WeightInfo::set_offchain_schema()]1195        #[transactional]1196        pub fn set_offchain_schema(1197            origin,1198            collection_id: CollectionId,1199            schema: Vec<u8>1200        ) -> DispatchResult {1201            let sender = ensure_signed(origin)?;1202            let mut target_collection = Self::get_collection(collection_id)?;1203            Self::check_owner_or_admin_permissions(&target_collection, sender.clone())?;12041205            // check schema limit1206            ensure!(schema.len() as u32 <= ChainLimit::get().offchain_schema_limit, "");12071208            target_collection.offchain_schema = schema;1209            Self::save_collection(target_collection);12101211            Ok(())1212        }12131214        /// Set const on-chain data schema.1215        /// 1216        /// # Permissions1217        /// 1218        /// * Collection Owner1219        /// * Collection Admin1220        /// 1221        /// # Arguments1222        /// 1223        /// * collection_id.1224        /// 1225        /// * schema: String representing the const on-chain data schema.1226        #[weight = <T as Config>::WeightInfo::set_const_on_chain_schema()]1227        #[transactional]1228        pub fn set_const_on_chain_schema (1229            origin,1230            collection_id: CollectionId,1231            schema: Vec<u8>1232        ) -> DispatchResult {1233            let sender = ensure_signed(origin)?;1234            let mut target_collection = Self::get_collection(collection_id)?;1235            Self::check_owner_or_admin_permissions(&target_collection, sender.clone())?;12361237            // check schema limit1238            ensure!(schema.len() as u32 <= ChainLimit::get().const_on_chain_schema_limit, "");12391240            target_collection.const_on_chain_schema = schema;1241            Self::save_collection(target_collection);12421243            Ok(())1244        }12451246        /// Set variable on-chain data schema.1247        /// 1248        /// # Permissions1249        /// 1250        /// * Collection Owner1251        /// * Collection Admin1252        /// 1253        /// # Arguments1254        /// 1255        /// * collection_id.1256        /// 1257        /// * schema: String representing the variable on-chain data schema.1258        #[weight = <T as Config>::WeightInfo::set_const_on_chain_schema()]1259        #[transactional]1260        pub fn set_variable_on_chain_schema (1261            origin,1262            collection_id: CollectionId,1263            schema: Vec<u8>1264        ) -> DispatchResult {1265            let sender = ensure_signed(origin)?;1266            let mut target_collection = Self::get_collection(collection_id)?;1267            Self::check_owner_or_admin_permissions(&target_collection, sender.clone())?;12681269            // check schema limit1270            ensure!(schema.len() as u32 <= ChainLimit::get().variable_on_chain_schema_limit, "");12711272            target_collection.variable_on_chain_schema = schema;1273            Self::save_collection(target_collection);12741275            Ok(())1276        }12771278        // Sudo permissions function1279        #[weight = <T as Config>::WeightInfo::set_chain_limits()]1280        #[transactional]1281        pub fn set_chain_limits(1282            origin,1283            limits: ChainLimits1284        ) -> DispatchResult {12851286            #[cfg(not(feature = "runtime-benchmarks"))]1287            ensure_root(origin)?;12881289            <ChainLimit>::put(limits);1290            Ok(())1291        }12921293        /// Enable smart contract self-sponsoring.1294        /// 1295        /// # Permissions1296        /// 1297        /// * Contract Owner1298        /// 1299        /// # Arguments1300        /// 1301        /// * contract address1302        /// * enable flag1303        /// 1304        #[weight = <T as Config>::WeightInfo::enable_contract_sponsoring()]1305        #[transactional]1306        pub fn enable_contract_sponsoring(1307            origin,1308            contract_address: T::AccountId,1309            enable: bool1310        ) -> DispatchResult {13111312            let sender = ensure_signed(origin)?;13131314            #[cfg(feature = "runtime-benchmarks")]1315            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());13161317            Self::ensure_contract_owned(sender, &contract_address)?;13181319            <ContractSelfSponsoring<T>>::insert(contract_address, enable);1320            Ok(())1321        }13221323        /// Set the rate limit for contract sponsoring to specified number of blocks.1324        /// 1325        /// If not set (has the default value of 0 blocks), the sponsoring will be disabled. 1326        /// If set to the number B (for blocks), the transactions will be sponsored with a rate 1327        /// limit of B, i.e. fees for every transaction sent to this smart contract will be paid 1328        /// from contract endowment if there are at least B blocks between such transactions. 1329        /// Nonetheless, if transactions are sent more frequently, the fees are paid by the sender.1330        /// 1331        /// # Permissions1332        /// 1333        /// * Contract Owner1334        /// 1335        /// # Arguments1336        /// 1337        /// -`contract_address`: Address of the contract to sponsor1338        /// -`rate_limit`: Number of blocks to wait until the next sponsored transaction is allowed1339        /// 1340        #[weight = <T as Config>::WeightInfo::set_contract_sponsoring_rate_limit()]1341        #[transactional]1342        pub fn set_contract_sponsoring_rate_limit(1343            origin,1344            contract_address: T::AccountId,1345            rate_limit: T::BlockNumber1346        ) -> DispatchResult {1347            let sender = ensure_signed(origin)?;13481349            #[cfg(feature = "runtime-benchmarks")]1350            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());13511352            Self::ensure_contract_owned(sender, &contract_address)?;1353            <ContractSponsoringRateLimit<T>>::insert(contract_address, rate_limit);1354            Ok(())1355        }13561357        /// Enable the white list for a contract. Only addresses added to the white list with addToContractWhiteList will be able to call this smart contract.1358        /// 1359        /// # Permissions1360        /// 1361        /// * Address that deployed smart contract.1362        /// 1363        /// # Arguments1364        /// 1365        /// -`contract_address`: Address of the contract.1366        /// 1367        /// - `enable`: .  1368        #[weight = <T as Config>::WeightInfo::toggle_contract_white_list()]1369        #[transactional]1370        pub fn toggle_contract_white_list(1371            origin,1372            contract_address: T::AccountId,1373            enable: bool1374        ) -> DispatchResult {1375            let sender = ensure_signed(origin)?;13761377            #[cfg(feature = "runtime-benchmarks")]1378            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());13791380            Self::ensure_contract_owned(sender, &contract_address)?;1381            if enable {1382                <ContractWhiteListEnabled<T>>::insert(contract_address, true);1383            } else {1384                <ContractWhiteListEnabled<T>>::remove(contract_address);1385            }1386            Ok(())1387        }1388        1389        /// Add an address to smart contract white list.1390        /// 1391        /// # Permissions1392        /// 1393        /// * Address that deployed smart contract.1394        /// 1395        /// # Arguments1396        /// 1397        /// -`contract_address`: Address of the contract.1398        ///1399        /// -`account_address`: Address to add.1400        #[weight = <T as Config>::WeightInfo::add_to_contract_white_list()]1401        #[transactional]1402        pub fn add_to_contract_white_list(1403            origin,1404            contract_address: T::AccountId,1405            account_address: T::AccountId1406        ) -> DispatchResult {1407            let sender = ensure_signed(origin)?;14081409            #[cfg(feature = "runtime-benchmarks")]1410            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());1411            1412            Self::ensure_contract_owned(sender, &contract_address)?;      1413            <ContractWhiteList<T>>::insert(contract_address, account_address, true);1414            Ok(())1415        }14161417        /// Remove an address from smart contract white list.1418        /// 1419        /// # Permissions1420        /// 1421        /// * Address that deployed smart contract.1422        /// 1423        /// # Arguments1424        /// 1425        /// -`contract_address`: Address of the contract.1426        ///1427        /// -`account_address`: Address to remove.1428        #[weight = <T as Config>::WeightInfo::remove_from_contract_white_list()]1429        #[transactional]1430        pub fn remove_from_contract_white_list(1431            origin,1432            contract_address: T::AccountId,1433            account_address: T::AccountId1434        ) -> DispatchResult {1435            let sender = ensure_signed(origin)?;14361437            #[cfg(feature = "runtime-benchmarks")]1438            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());14391440            Self::ensure_contract_owned(sender, &contract_address)?;1441            <ContractWhiteList<T>>::remove(contract_address, account_address);1442            Ok(())1443        }14441445        #[weight = <T as Config>::WeightInfo::set_collection_limits()]1446        #[transactional]1447        pub fn set_collection_limits(1448            origin,1449            collection_id: u32,1450            new_limits: CollectionLimits<T::BlockNumber>,1451        ) -> DispatchResult {1452            let sender = ensure_signed(origin)?;1453            let mut target_collection = Self::get_collection(collection_id)?;1454            Self::check_owner_permissions(&target_collection, sender.clone())?;1455            let old_limits = &target_collection.limits;1456            let chain_limits = ChainLimit::get();14571458            // collection bounds1459            ensure!(new_limits.sponsor_transfer_timeout <= MAX_SPONSOR_TIMEOUT &&1460                new_limits.account_token_ownership_limit <= MAX_TOKEN_OWNERSHIP && 1461                new_limits.sponsored_data_size <= chain_limits.custom_data_limit,1462                Error::<T>::CollectionLimitBoundsExceeded);14631464            // token_limit   check  prev1465            ensure!(old_limits.token_limit >= new_limits.token_limit, Error::<T>::CollectionTokenLimitExceeded);1466            ensure!(new_limits.token_limit > 0, Error::<T>::CollectionTokenLimitExceeded);14671468            ensure!(1469                (old_limits.owner_can_transfer || !new_limits.owner_can_transfer) &&1470                (old_limits.owner_can_destroy || !new_limits.owner_can_destroy),1471                Error::<T>::OwnerPermissionsCantBeReverted,1472            );14731474            target_collection.limits = new_limits;1475            Self::save_collection(target_collection);14761477            Ok(())1478        } 1479    }1480}14811482impl<T: Config> Module<T> {1483    pub fn create_item_internal(sender: T::AccountId, collection_id: CollectionId, owner: T::AccountId, data: CreateItemData) -> DispatchResult {1484        let target_collection = Self::get_collection(collection_id)?;14851486        Self::can_create_items_in_collection(&target_collection, &sender, &owner, 1)?;1487        Self::validate_create_item_args(&target_collection, &data)?;1488        Self::create_item_no_validation(&target_collection, owner, data)?;14891490        Ok(())1491    }14921493    pub fn transfer_internal(sender: T::AccountId, recipient: T::AccountId, target_collection: &CollectionHandle<T>, item_id: TokenId, value: u128) -> DispatchResult {1494        // Limits check1495        Self::is_correct_transfer(target_collection, &recipient)?;14961497        // Transfer permissions check1498        ensure!(Self::is_item_owner(sender.clone(), target_collection, item_id) ||1499            Self::is_owner_or_admin_permissions(target_collection, sender.clone()),1500            Error::<T>::NoPermission);15011502        if target_collection.access == AccessMode::WhiteList {1503            Self::check_white_list(target_collection, &sender)?;1504            Self::check_white_list(target_collection, &recipient)?;1505        }15061507        match target_collection.mode1508        {1509            CollectionMode::NFT => Self::transfer_nft(target_collection, item_id, sender.clone(), recipient.clone())?,1510            CollectionMode::Fungible(_)  => Self::transfer_fungible(target_collection, value, &sender, &recipient)?,1511            CollectionMode::ReFungible  => Self::transfer_refungible(target_collection, item_id, value, sender.clone(), recipient.clone())?,1512            _ => ()1513        };15141515        Self::deposit_event(RawEvent::Transfer(target_collection.id, item_id, sender, recipient, value));15161517        Ok(())1518    }151915201521    fn is_correct_transfer(collection: &CollectionHandle<T>, recipient: &T::AccountId) -> DispatchResult {1522        let collection_id = collection.id;15231524        // check token limit and account token limit1525        let account_items: u32 = <AddressTokens<T>>::get(collection_id, recipient).len() as u32;1526        ensure!(collection.limits.account_token_ownership_limit > account_items,  Error::<T>::AccountTokenLimitExceeded);1527        1528        Ok(())1529    }15301531    fn can_create_items_in_collection(collection: &CollectionHandle<T>, sender: &T::AccountId, owner: &T::AccountId, amount: u32) -> DispatchResult {1532        let collection_id = collection.id;15331534        // check token limit and account token limit1535        let total_items: u32 = ItemListIndex::get(collection_id)1536            .checked_add(amount)1537            .ok_or(Error::<T>::CollectionTokenLimitExceeded)?;1538        let account_items: u32 = (<AddressTokens<T>>::get(collection_id, owner).len() as u32)1539            .checked_add(amount)1540            .ok_or(Error::<T>::AccountTokenLimitExceeded)?;1541        ensure!(collection.limits.token_limit >= total_items,  Error::<T>::CollectionTokenLimitExceeded);1542        ensure!(collection.limits.account_token_ownership_limit >= account_items,  Error::<T>::AccountTokenLimitExceeded);15431544        if !Self::is_owner_or_admin_permissions(collection, sender.clone()) {1545            ensure!(collection.mint_mode == true, Error::<T>::PublicMintingNotAllowed);1546            Self::check_white_list(collection, owner)?;1547            Self::check_white_list(collection, sender)?;1548        }15491550        Ok(())1551    }15521553    fn validate_create_item_args(target_collection: &CollectionHandle<T>, data: &CreateItemData) -> DispatchResult {1554        match target_collection.mode1555        {1556            CollectionMode::NFT => {1557                if let CreateItemData::NFT(data) = data {1558                    // check sizes1559                    ensure!(ChainLimit::get().custom_data_limit >= data.const_data.len() as u32, Error::<T>::TokenConstDataLimitExceeded);1560                    ensure!(ChainLimit::get().custom_data_limit >= data.variable_data.len() as u32, Error::<T>::TokenVariableDataLimitExceeded);1561                } else {1562                    fail!(Error::<T>::NotNftDataUsedToMintNftCollectionToken);1563                }1564            },1565            CollectionMode::Fungible(_) => {1566                if let CreateItemData::Fungible(_) = data {1567                } else {1568                    fail!(Error::<T>::NotFungibleDataUsedToMintFungibleCollectionToken);1569                }1570            },1571            CollectionMode::ReFungible => {1572                if let CreateItemData::ReFungible(data) = data {15731574                    // check sizes1575                    ensure!(ChainLimit::get().custom_data_limit >= data.const_data.len() as u32, Error::<T>::TokenConstDataLimitExceeded);1576                    ensure!(ChainLimit::get().custom_data_limit >= data.variable_data.len() as u32, Error::<T>::TokenVariableDataLimitExceeded);15771578                    // Check refungibility limits1579                    ensure!(data.pieces <= MAX_REFUNGIBLE_PIECES, Error::<T>::WrongRefungiblePieces);1580                    ensure!(data.pieces > 0, Error::<T>::WrongRefungiblePieces);1581                } else {1582                    fail!(Error::<T>::NotReFungibleDataUsedToMintReFungibleCollectionToken);1583                }1584            },1585            _ => { fail!(Error::<T>::UnexpectedCollectionType); }1586        };15871588        Ok(())1589    }15901591    fn create_item_no_validation(collection: &CollectionHandle<T>, owner: T::AccountId, data: CreateItemData) -> DispatchResult {1592        match data1593        {1594            CreateItemData::NFT(data) => {1595                let item = NftItemType {1596                    owner: owner.clone(),1597                    const_data: data.const_data,1598                    variable_data: data.variable_data1599                };16001601                Self::add_nft_item(collection, item)?;1602            },1603            CreateItemData::Fungible(data) => {1604                Self::add_fungible_item(collection, &owner, data.value)?;1605            },1606            CreateItemData::ReFungible(data) => {1607                let mut owner_list = Vec::new();1608                owner_list.push(Ownership {owner: owner.clone(), fraction: data.pieces});16091610                let item = ReFungibleItemType {1611                    owner: owner_list,1612                    const_data: data.const_data,1613                    variable_data: data.variable_data1614                };16151616                Self::add_refungible_item(collection, item)?;1617            }1618        };16191620        Ok(())1621    }16221623    fn add_fungible_item(collection: &CollectionHandle<T>, owner: &T::AccountId, value: u128) -> DispatchResult {1624        let collection_id = collection.id;16251626        // Does new owner already have an account?1627        let balance: u128 = <FungibleItemList<T>>::get(collection_id, owner).value;16281629        // Mint 1630        let item = FungibleItemType {1631            value: balance.checked_add(value).ok_or(Error::<T>::NumOverflow)?,1632        };1633        <FungibleItemList<T>>::insert(collection_id, (*owner).clone(), item);16341635        // Update balance1636        let new_balance = <Balance<T>>::get(collection_id, owner)1637            .checked_add(value)1638            .ok_or(Error::<T>::NumOverflow)?;1639        <Balance<T>>::insert(collection_id, (*owner).clone(), new_balance);16401641        Self::deposit_event(RawEvent::ItemCreated(collection_id, 0, owner.clone()));1642        Ok(())1643    }16441645    fn add_refungible_item(collection: &CollectionHandle<T>, item: ReFungibleItemType<T::AccountId>) -> DispatchResult {1646        let collection_id = collection.id;16471648        let current_index = <ItemListIndex>::get(collection_id)1649            .checked_add(1)1650            .ok_or(Error::<T>::NumOverflow)?;1651        let itemcopy = item.clone();16521653        ensure!(1654            item.owner.len() == 1,1655            Error::<T>::BadCreateRefungibleCall,1656        );1657        let item_owner = item.owner.first().expect("only one owner is defined");16581659        let value = item_owner.fraction;1660        let owner = item_owner.owner.clone();16611662        Self::add_token_index(collection_id, current_index, &owner)?;16631664        <ItemListIndex>::insert(collection_id, current_index);1665        <ReFungibleItemList<T>>::insert(collection_id, current_index, itemcopy);16661667        // Update balance1668        let new_balance = <Balance<T>>::get(collection_id, &owner)1669            .checked_add(value)1670            .ok_or(Error::<T>::NumOverflow)?;1671        <Balance<T>>::insert(collection_id, owner.clone(), new_balance);16721673        Self::deposit_event(RawEvent::ItemCreated(collection_id, current_index, owner));1674        Ok(())1675    }16761677    fn add_nft_item(collection: &CollectionHandle<T>, item: NftItemType<T::AccountId>) -> DispatchResult {1678        let collection_id = collection.id;16791680        let current_index = <ItemListIndex>::get(collection_id)1681            .checked_add(1)1682            .ok_or(Error::<T>::NumOverflow)?;16831684        let item_owner = item.owner.clone();1685        Self::add_token_index(collection_id, current_index, &item.owner)?;16861687        <ItemListIndex>::insert(collection_id, current_index);1688        <NftItemList<T>>::insert(collection_id, current_index, item);16891690        // Update balance1691        let new_balance = <Balance<T>>::get(collection_id, item_owner.clone())1692            .checked_add(1)1693            .ok_or(Error::<T>::NumOverflow)?;1694        <Balance<T>>::insert(collection_id, item_owner.clone(), new_balance);16951696        Self::deposit_event(RawEvent::ItemCreated(collection_id, current_index, item_owner));1697        Ok(())1698    }16991700    fn burn_refungible_item(1701        collection: &CollectionHandle<T>,1702        item_id: TokenId,1703        owner: &T::AccountId,1704    ) -> DispatchResult {1705        let collection_id = collection.id;17061707        let mut token = <ReFungibleItemList<T>>::get(collection_id, item_id)1708            .ok_or(Error::<T>::TokenNotFound)?;1709        let rft_balance = token1710            .owner1711            .iter()1712            .find(|&i| i.owner == *owner)1713            .ok_or(Error::<T>::TokenNotFound)?;1714        Self::remove_token_index(collection_id, item_id, owner)?;17151716        // update balance1717        let new_balance = <Balance<T>>::get(collection_id, rft_balance.owner.clone())1718            .checked_sub(rft_balance.fraction)1719            .ok_or(Error::<T>::NumOverflow)?;1720        <Balance<T>>::insert(collection_id, rft_balance.owner.clone(), new_balance);17211722        // Re-create owners list with sender removed1723        let index = token1724            .owner1725            .iter()1726            .position(|i| i.owner == *owner)1727            .expect("owned item is exists");1728        token.owner.remove(index);1729        let owner_count = token.owner.len();17301731        // Burn the token completely if this was the last (only) owner1732        if owner_count == 0 {1733            <ReFungibleItemList<T>>::remove(collection_id, item_id);1734            <VariableMetaDataBasket<T>>::remove(collection_id, item_id);1735        }1736        else {1737            <ReFungibleItemList<T>>::insert(collection_id, item_id, token);1738        }17391740        Ok(())1741    }17421743    fn burn_nft_item(collection: &CollectionHandle<T>, item_id: TokenId) -> DispatchResult {1744        let collection_id = collection.id;17451746        let item = <NftItemList<T>>::get(collection_id, item_id)1747            .ok_or(Error::<T>::TokenNotFound)?;1748        Self::remove_token_index(collection_id, item_id, &item.owner)?;17491750        // update balance1751        let new_balance = <Balance<T>>::get(collection_id, &item.owner)1752            .checked_sub(1)1753            .ok_or(Error::<T>::NumOverflow)?;1754        <Balance<T>>::insert(collection_id, item.owner.clone(), new_balance);1755        <NftItemList<T>>::remove(collection_id, item_id);1756        <VariableMetaDataBasket<T>>::remove(collection_id, item_id);17571758        Ok(())1759    }17601761    fn burn_fungible_item(owner: &T::AccountId, collection: &CollectionHandle<T>, value: u128) -> DispatchResult {1762        let collection_id = collection.id;17631764        let mut balance = <FungibleItemList<T>>::get(collection_id, owner);1765        ensure!(balance.value >= value, Error::<T>::TokenValueNotEnough);17661767        // update balance1768        let new_balance = <Balance<T>>::get(collection_id, owner)1769            .checked_sub(value)1770            .ok_or(Error::<T>::NumOverflow)?;1771        <Balance<T>>::insert(collection_id, (*owner).clone(), new_balance);17721773        if balance.value - value > 0 {1774            balance.value -= value;1775            <FungibleItemList<T>>::insert(collection_id, (*owner).clone(), balance);1776        }1777        else {1778            <FungibleItemList<T>>::remove(collection_id, owner);1779        }17801781        Ok(())1782    }17831784    pub fn get_collection(collection_id: CollectionId) -> Result<CollectionHandle<T>, sp_runtime::DispatchError> {1785        Ok(<CollectionById<T>>::get(collection_id)1786            .map(|collection| CollectionHandle {1787                id: collection_id,1788                collection1789            })1790            .ok_or(Error::<T>::CollectionNotFound)?)1791    }17921793    fn save_collection(collection: CollectionHandle<T>) {1794        <CollectionById<T>>::insert(collection.id, collection.collection);1795    }17961797    fn check_owner_permissions(target_collection: &CollectionHandle<T>, subject: T::AccountId) -> DispatchResult {1798        ensure!(1799            subject == target_collection.owner,1800            Error::<T>::NoPermission1801        );18021803        Ok(())1804    }18051806    fn is_owner_or_admin_permissions(collection: &CollectionHandle<T>, subject: T::AccountId) -> bool {1807        subject == collection.owner || <AdminList<T>>::get(collection.id).contains(&subject)1808    }18091810    fn check_owner_or_admin_permissions(1811        collection: &CollectionHandle<T>,1812        subject: T::AccountId,1813    ) -> DispatchResult {1814        ensure!(Self::is_owner_or_admin_permissions(collection, subject), Error::<T>::NoPermission);18151816        Ok(())1817    }18181819    fn owned_amount(1820        subject: T::AccountId,1821        target_collection: &CollectionHandle<T>,1822        item_id: TokenId,1823    ) -> Option<u128> {1824        let collection_id = target_collection.id;18251826        match target_collection.mode {1827            CollectionMode::NFT => (<NftItemList<T>>::get(collection_id, item_id)?.owner == subject)1828                .then(|| 1),1829            CollectionMode::Fungible(_) => Some(<FungibleItemList<T>>::get(collection_id, &subject)1830                .value),1831            CollectionMode::ReFungible => <ReFungibleItemList<T>>::get(collection_id, item_id)?1832                .owner1833                .iter()1834                .find(|i| i.owner == subject)1835                .map(|i| i.fraction),1836            CollectionMode::Invalid => None,1837        }1838    }18391840    fn is_item_owner(subject: T::AccountId, target_collection: &CollectionHandle<T>, item_id: TokenId) -> bool {1841        match target_collection.mode {1842            CollectionMode::Fungible(_) => true,1843            _ => Self::owned_amount(subject, target_collection, item_id).is_some(),1844        }1845    }18461847    fn check_white_list(collection: &CollectionHandle<T>, address: &T::AccountId) -> DispatchResult {1848        let collection_id = collection.id;18491850        let mes = Error::<T>::AddresNotInWhiteList;1851        ensure!(<WhiteList<T>>::contains_key(collection_id, address), mes);18521853        Ok(())1854    }18551856    /// Check if token exists. In case of Fungible, check if there is an entry for 1857    /// the owner in fungible balances double map1858    fn token_exists(1859        target_collection: &CollectionHandle<T>,1860        item_id: TokenId,1861    ) -> DispatchResult {1862        let collection_id = target_collection.id;1863        let exists = match target_collection.mode1864        {1865            CollectionMode::NFT => <NftItemList<T>>::contains_key(collection_id, item_id),1866            CollectionMode::Fungible(_)  => true,1867            CollectionMode::ReFungible  => <ReFungibleItemList<T>>::contains_key(collection_id, item_id),1868            _ => false1869        };18701871        ensure!(exists == true, Error::<T>::TokenNotFound);1872        Ok(())1873    }18741875    fn transfer_fungible(1876        collection: &CollectionHandle<T>,1877        value: u128,1878        owner: &T::AccountId,1879        recipient: &T::AccountId,1880    ) -> DispatchResult {1881        let collection_id = collection.id;18821883        let mut balance = <FungibleItemList<T>>::get(collection_id, owner);1884        ensure!(balance.value >= value, Error::<T>::TokenValueTooLow);18851886        // Send balance to recipient (updates balanceOf of recipient)1887        Self::add_fungible_item(collection, recipient, value)?;18881889        // update balanceOf of sender1890        <Balance<T>>::insert(collection_id, (*owner).clone(), balance.value - value);18911892        // Reduce or remove sender1893        if balance.value == value {1894            <FungibleItemList<T>>::remove(collection_id, owner);1895        }1896        else {1897            balance.value -= value;1898            <FungibleItemList<T>>::insert(collection_id, (*owner).clone(), balance);1899        }19001901        Ok(())1902    }19031904    fn transfer_refungible(1905        collection: &CollectionHandle<T>,1906        item_id: TokenId,1907        value: u128,1908        owner: T::AccountId,1909        new_owner: T::AccountId,1910    ) -> DispatchResult {1911        let collection_id = collection.id;1912        let full_item = <ReFungibleItemList<T>>::get(collection_id, item_id)1913            .ok_or(Error::<T>::TokenNotFound)?;19141915        let item = full_item1916            .owner1917            .iter()1918            .filter(|i| i.owner == owner)1919            .next()1920            .ok_or(Error::<T>::TokenNotFound)?;1921        let amount = item.fraction;19221923        ensure!(amount >= value, Error::<T>::TokenValueTooLow);19241925        // update balance1926        let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.clone())1927            .checked_sub(value)1928            .ok_or(Error::<T>::NumOverflow)?;1929        <Balance<T>>::insert(collection_id, item.owner.clone(), balance_old_owner);19301931        let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.clone())1932            .checked_add(value)1933            .ok_or(Error::<T>::NumOverflow)?;1934        <Balance<T>>::insert(collection_id, new_owner.clone(), balance_new_owner);19351936        let old_owner = item.owner.clone();1937        let new_owner_has_account = full_item.owner.iter().any(|i| i.owner == new_owner);19381939        // transfer1940        if amount == value && !new_owner_has_account {1941            // change owner1942            // new owner do not have account1943            let mut new_full_item = full_item.clone();1944            new_full_item1945                .owner1946                .iter_mut()1947                .find(|i| i.owner == owner)1948                .expect("old owner does present in refungible")1949                .owner = new_owner.clone();1950            <ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);19511952            // update index collection1953            Self::move_token_index(collection_id, item_id, &old_owner, &new_owner)?;1954        } else {1955            let mut new_full_item = full_item.clone();1956            new_full_item1957                .owner1958                .iter_mut()1959                .find(|i| i.owner == owner)1960                .expect("old owner does present in refungible")1961                .fraction -= value;19621963            // separate amount1964            if new_owner_has_account {1965                // new owner has account1966                new_full_item1967                    .owner1968                    .iter_mut()1969                    .find(|i| i.owner == new_owner)1970                    .expect("new owner has account")1971                    .fraction += value;1972            } else {1973                // new owner do not have account1974                new_full_item.owner.push(Ownership {1975                    owner: new_owner.clone(),1976                    fraction: value,1977                });1978                Self::add_token_index(collection_id, item_id, &new_owner)?;1979            }19801981            <ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);1982        }19831984        Ok(())1985    }19861987    fn transfer_nft(1988        collection: &CollectionHandle<T>,1989        item_id: TokenId,1990        sender: T::AccountId,1991        new_owner: T::AccountId,1992    ) -> DispatchResult {1993        let collection_id = collection.id;1994        let mut item = <NftItemList<T>>::get(collection_id, item_id)1995            .ok_or(Error::<T>::TokenNotFound)?;19961997        ensure!(1998            sender == item.owner,1999            Error::<T>::MustBeTokenOwner2000        );20012002        // update balance2003        let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.clone())2004            .checked_sub(1)2005            .ok_or(Error::<T>::NumOverflow)?;2006        <Balance<T>>::insert(collection_id, item.owner.clone(), balance_old_owner);20072008        let balancenew_owner = <Balance<T>>::get(collection_id, new_owner.clone())2009            .checked_add(1)2010            .ok_or(Error::<T>::NumOverflow)?;2011        <Balance<T>>::insert(collection_id, new_owner.clone(), balancenew_owner);20122013        // change owner2014        let old_owner = item.owner.clone();2015        item.owner = new_owner.clone();2016        <NftItemList<T>>::insert(collection_id, item_id, item);20172018        // update index collection2019        Self::move_token_index(collection_id, item_id, &old_owner, &new_owner)?;20202021        Ok(())2022    }2023    2024    fn set_re_fungible_variable_data(2025        collection: &CollectionHandle<T>,2026        item_id: TokenId,2027        data: Vec<u8>2028    ) -> DispatchResult {2029        let collection_id = collection.id;2030        let mut item = <ReFungibleItemList<T>>::get(collection_id, item_id)2031            .ok_or(Error::<T>::TokenNotFound)?;20322033        item.variable_data = data;20342035        <ReFungibleItemList<T>>::insert(collection_id, item_id, item);20362037        Ok(())2038    }20392040    fn set_nft_variable_data(2041        collection: &CollectionHandle<T>,2042        item_id: TokenId,2043        data: Vec<u8>2044    ) -> DispatchResult {2045        let collection_id = collection.id;2046        let mut item = <NftItemList<T>>::get(collection_id, item_id)2047            .ok_or(Error::<T>::TokenNotFound)?;2048        2049        item.variable_data = data;20502051        <NftItemList<T>>::insert(collection_id, item_id, item);2052        2053        Ok(())2054    }20552056    #[allow(dead_code)]2057    fn init_collection(item: &Collection<T>) {2058        // check params2059        assert!(2060            item.decimal_points <= MAX_DECIMAL_POINTS,2061            "decimal_points parameter must be lower than MAX_DECIMAL_POINTS"2062        );2063        assert!(2064            item.name.len() <= 64,2065            "Collection name can not be longer than 63 char"2066        );2067        assert!(2068            item.name.len() <= 256,2069            "Collection description can not be longer than 255 char"2070        );2071        assert!(2072            item.token_prefix.len() <= 16,2073            "Token prefix can not be longer than 15 char"2074        );20752076        // Generate next collection ID2077        let next_id = CreatedCollectionCount::get()2078            .checked_add(1)2079            .unwrap();20802081        CreatedCollectionCount::put(next_id);2082    }20832084    #[allow(dead_code)]2085    fn init_nft_token(collection_id: CollectionId, item: &NftItemType<T::AccountId>) {2086        let current_index = <ItemListIndex>::get(collection_id)2087            .checked_add(1)2088            .unwrap();20892090        let item_owner = item.owner.clone();2091        Self::add_token_index(collection_id, current_index, &item.owner).unwrap();20922093        <ItemListIndex>::insert(collection_id, current_index);20942095        // Update balance2096        let new_balance = <Balance<T>>::get(collection_id, &item_owner)2097            .checked_add(1)2098            .unwrap();2099        <Balance<T>>::insert(collection_id, item_owner.clone(), new_balance);2100    }21012102    #[allow(dead_code)]2103    fn init_fungible_token(collection_id: CollectionId, owner: &T::AccountId, item: &FungibleItemType) {2104        let current_index = <ItemListIndex>::get(collection_id)2105            .checked_add(1)2106            .unwrap();21072108        Self::add_token_index(collection_id, current_index, owner).unwrap();21092110        <ItemListIndex>::insert(collection_id, current_index);21112112        // Update balance2113        let new_balance = <Balance<T>>::get(collection_id, owner)2114            .checked_add(item.value)2115            .unwrap();2116        <Balance<T>>::insert(collection_id, (*owner).clone(), new_balance);2117    }21182119    #[allow(dead_code)]2120    fn init_refungible_token(collection_id: CollectionId, item: &ReFungibleItemType<T::AccountId>) {2121        let current_index = <ItemListIndex>::get(collection_id)2122            .checked_add(1)2123            .unwrap();21242125        let value = item.owner.first().unwrap().fraction;2126        let owner = item.owner.first().unwrap().owner.clone();21272128        Self::add_token_index(collection_id, current_index, &owner).unwrap();21292130        <ItemListIndex>::insert(collection_id, current_index);21312132        // Update balance2133        let new_balance = <Balance<T>>::get(collection_id, &owner)2134            .checked_add(value)2135            .unwrap();2136        <Balance<T>>::insert(collection_id, owner.clone(), new_balance);2137    }21382139    fn add_token_index(collection_id: CollectionId, item_index: TokenId, owner: &T::AccountId) -> DispatchResult {2140        // add to account limit2141        if <AccountItemCount<T>>::contains_key(owner) {21422143            // bound Owned tokens by a single address2144            let count = <AccountItemCount<T>>::get(owner);2145            ensure!(count < ChainLimit::get().account_token_ownership_limit, Error::<T>::AddressOwnershipLimitExceeded);21462147            <AccountItemCount<T>>::insert(owner.clone(), count2148                .checked_add(1)2149                .ok_or(Error::<T>::NumOverflow)?);2150        }2151        else {2152            <AccountItemCount<T>>::insert(owner.clone(), 1);2153        }21542155        let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner);2156        if list_exists {2157            let mut list = <AddressTokens<T>>::get(collection_id, owner);2158            let item_contains = list.contains(&item_index.clone());21592160            if !item_contains {2161                list.push(item_index.clone());2162            }21632164            <AddressTokens<T>>::insert(collection_id, owner.clone(), list);2165        } else {2166            let mut itm = Vec::new();2167            itm.push(item_index.clone());2168            <AddressTokens<T>>::insert(collection_id, owner.clone(), itm);2169        }21702171        Ok(())2172    }21732174    fn remove_token_index(2175        collection_id: CollectionId,2176        item_index: TokenId,2177        owner: &T::AccountId,2178    ) -> DispatchResult {21792180        // update counter2181        <AccountItemCount<T>>::insert(owner.clone(), 2182            <AccountItemCount<T>>::get(owner)2183            .checked_sub(1)2184            .ok_or(Error::<T>::NumOverflow)?);218521862187        let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner);2188        if list_exists {2189            let mut list = <AddressTokens<T>>::get(collection_id, owner);2190            let item_contains = list.contains(&item_index.clone());21912192            if item_contains {2193                list.retain(|&item| item != item_index);2194                <AddressTokens<T>>::insert(collection_id, owner.clone(), list);2195            }2196        }21972198        Ok(())2199    }22002201    fn move_token_index(2202        collection_id: CollectionId,2203        item_index: TokenId,2204        old_owner: &T::AccountId,2205        new_owner: &T::AccountId,2206    ) -> DispatchResult {2207        Self::remove_token_index(collection_id, item_index, old_owner)?;2208        Self::add_token_index(collection_id, item_index, new_owner)?;22092210        Ok(())2211    }2212    2213    fn ensure_contract_owned(account: T::AccountId, contract: &T::AccountId) -> DispatchResult {2214        ensure!(<ContractOwner<T>>::get(contract) == Some(account), Error::<T>::NoPermission);22152216        Ok(())2217    }2218}