git.delta.rocks / unique-network / refs/commits / e5c09cb43ca9

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::*;1516pub use frame_support::{17    construct_runtime, decl_event, decl_module, decl_storage, decl_error,18    dispatch::DispatchResult,19    ensure, fail, parameter_types,20    traits::{21        Currency, ExistenceRequirement, Get, Imbalance, KeyOwnerProofSystem, OnUnbalanced,22        Randomness, IsSubType, WithdrawReasons,23    },24    weights::{25        constants::{BlockExecutionWeight, ExtrinsicBaseWeight, RocksDbWeight, WEIGHT_PER_SECOND},26        DispatchInfo, GetDispatchInfo, IdentityFee, Pays, PostDispatchInfo, Weight,27        WeightToFeePolynomial, DispatchClass,28    },29    StorageValue,30    transactional,31};3233use frame_system::{self as system, ensure_signed, ensure_root};34use sp_runtime::sp_std::prelude::Vec;35use core::ops::{Deref, DerefMut};36use nft_data_structs::{37    MAX_DECIMAL_POINTS, MAX_SPONSOR_TIMEOUT, MAX_TOKEN_OWNERSHIP, MAX_REFUNGIBLE_PIECES,38	AccessMode, ChainLimits, Collection, CreateItemData, CollectionLimits,39    CollectionId, CollectionMode, TokenId, 40    SchemaVersion, SponsorshipState, Ownership,41    NftItemType, FungibleItemType, ReFungibleItemType42};4344#[cfg(test)]45mod mock;4647#[cfg(test)]48mod tests;4950mod default_weights;5152#[cfg(feature = "runtime-benchmarks")]53mod benchmarking;5455pub trait WeightInfo {56	fn create_collection() -> Weight;57	fn destroy_collection() -> Weight;58	fn add_to_white_list() -> Weight;59	fn remove_from_white_list() -> Weight;60    fn set_public_access_mode() -> Weight;61    fn set_mint_permission() -> Weight;62    fn change_collection_owner() -> Weight;63    fn add_collection_admin() -> Weight;64    fn remove_collection_admin() -> Weight;65    fn set_collection_sponsor() -> Weight;66    fn confirm_sponsorship() -> Weight;67    fn remove_collection_sponsor() -> Weight;68    fn create_item(s: usize) -> Weight;69    fn burn_item() -> Weight;70    fn transfer() -> Weight;71    fn approve() -> Weight;72    fn transfer_from() -> Weight;73    fn set_offchain_schema() -> Weight;74    fn set_const_on_chain_schema() -> Weight;75    fn set_variable_on_chain_schema() -> Weight;76    fn set_variable_meta_data() -> Weight;77    fn enable_contract_sponsoring() -> Weight;78    fn set_schema_version() -> Weight;79    fn set_chain_limits() -> Weight;80    fn set_contract_sponsoring_rate_limit() -> Weight;81    fn set_variable_meta_data_sponsoring_rate_limit() -> Weight;82    fn toggle_contract_white_list() -> Weight;83    fn add_to_contract_white_list() -> Weight;84    fn remove_from_contract_white_list() -> Weight;85    fn set_collection_limits() -> Weight;86}8788decl_error! {89	/// Error for non-fungible-token module.90	pub enum Error for Module<T: Config> {91        /// Total collections bound exceeded.92        TotalCollectionsLimitExceeded,93		/// Decimal_points parameter must be lower than MAX_DECIMAL_POINTS constant, currently it is 30.94        CollectionDecimalPointLimitExceeded, 95        /// Collection name can not be longer than 63 char.96        CollectionNameLimitExceeded, 97        /// Collection description can not be longer than 255 char.98        CollectionDescriptionLimitExceeded, 99        /// Token prefix can not be longer than 15 char.100        CollectionTokenPrefixLimitExceeded,101        /// This collection does not exist.102        CollectionNotFound,103        /// Item not exists.104        TokenNotFound,105        /// Admin not found106        AdminNotFound,107        /// Arithmetic calculation overflow.108        NumOverflow,       109        /// Account already has admin role.110        AlreadyAdmin,  111        /// You do not own this collection.112        NoPermission,113        /// This address is not set as sponsor, use setCollectionSponsor first.114        ConfirmUnsetSponsorFail,115        /// Collection is not in mint mode.116        PublicMintingNotAllowed,117        /// Sender parameter and item owner must be equal.118        MustBeTokenOwner,119        /// Item balance not enough.120        TokenValueTooLow,121        /// Size of item is too large.122        NftSizeLimitExceeded,123        /// No approve found124        ApproveNotFound,125        /// Requested value more than approved.126        TokenValueNotEnough,127        /// Only approved addresses can call this method.128        ApproveRequired,129        /// Address is not in white list.130        AddresNotInWhiteList,131        /// Number of collection admins bound exceeded.132        CollectionAdminsLimitExceeded,133        /// Owned tokens by a single address bound exceeded.134        AddressOwnershipLimitExceeded,135        /// Length of items properties must be greater than 0.136        EmptyArgument,137        /// const_data exceeded data limit.138        TokenConstDataLimitExceeded,139        /// variable_data exceeded data limit.140        TokenVariableDataLimitExceeded,141        /// Not NFT item data used to mint in NFT collection.142        NotNftDataUsedToMintNftCollectionToken,143        /// Not Fungible item data used to mint in Fungible collection.144        NotFungibleDataUsedToMintFungibleCollectionToken,145        /// Not Re Fungible item data used to mint in Re Fungible collection.146        NotReFungibleDataUsedToMintReFungibleCollectionToken,147        /// Unexpected collection type.148        UnexpectedCollectionType,149        /// Can't store metadata in fungible tokens.150        CantStoreMetadataInFungibleTokens,151        /// Collection token limit exceeded152        CollectionTokenLimitExceeded,153        /// Account token limit exceeded per collection154        AccountTokenLimitExceeded,155        /// Collection limit bounds per collection exceeded156        CollectionLimitBoundsExceeded,157        /// Tried to enable permissions which are only permitted to be disabled158        OwnerPermissionsCantBeReverted,159        /// Schema data size limit bound exceeded160        SchemaDataLimitExceeded,161        /// Maximum refungibility exceeded162        WrongRefungiblePieces,163        /// createRefungible should be called with one owner164        BadCreateRefungibleCall,165	}166}167168pub struct CollectionHandle<T: system::Config> {169    pub id: CollectionId,170    pub collection: Collection<T>,171}172173impl<T: frame_system::Config> Deref for CollectionHandle<T> {174    type Target = Collection<T>;175176    fn deref(&self) -> &Self::Target {177        &self.collection178    }179}180181impl<T: frame_system::Config> DerefMut for CollectionHandle<T> {182    fn deref_mut(&mut self) -> &mut Self::Target {183        &mut self.collection184    }185}186187pub trait Config: system::Config + Sized {188    type Event: From<Event<Self>> + Into<<Self as system::Config>::Event>;189190    /// Weight information for extrinsics in this pallet.191	type WeightInfo: WeightInfo;192193    type Currency: Currency<Self::AccountId>;194    type CollectionCreationPrice: Get<<<Self as Config>::Currency as Currency<Self::AccountId>>::Balance>;195    type TreasuryAccountId: Get<Self::AccountId>;196}197198// # Used definitions199//200// ## User control levels201//202// chain-controlled - key is uncontrolled by user203//                    i.e autoincrementing index204//                    can use non-cryptographic hash205// real - key is controlled by user206//        but it is hard to generate enough colliding values, i.e owner of signed txs207//        can use non-cryptographic hash208// controlled - key is completly controlled by users209//              i.e maps with mutable keys210//              should use cryptographic hash211//212// ## User control level downgrade reasons213//214// ?1 - chain-controlled -> controlled215//      collections/tokens can be destroyed, resulting in massive holes216// ?2 - chain-controlled -> controlled217//      same as ?1, but can be only added, resulting in easier exploitation218// ?3 - real -> controlled219//      no confirmation required, so addresses can be easily generated220decl_storage! {221    trait Store for Module<T: Config> as Nft {222223        //#region Private members224        /// Id of next collection225        CreatedCollectionCount: u32;226        /// Used for migrations227        ChainVersion: u64;228        /// Id of last collection token229        /// Collection id (controlled?1)230        ItemListIndex: map hasher(blake2_128_concat) CollectionId => TokenId;231        //#endregion232233        //#region Chain limits struct234        pub ChainLimit get(fn chain_limit) config(): ChainLimits;235        //#endregion236237        //#region Bound counters238        /// Amount of collections destroyed, used for total amount tracking with239        /// CreatedCollectionCount240        DestroyedCollectionCount: u32;241        /// Total amount of account owned tokens (NFTs + RFTs + unique fungibles)242        /// Account id (real)243        pub AccountItemCount get(fn account_item_count): map hasher(twox_64_concat) T::AccountId => u32;244        //#endregion245246        //#region Basic collections247        /// Collection info248        /// Collection id (controlled?1)249        pub CollectionById get(fn collection_id) config(): map hasher(blake2_128_concat) CollectionId => Option<Collection<T>> = None;250        /// List of collection admins251        /// Collection id (controlled?2)252        pub AdminList get(fn admin_list_collection): map hasher(blake2_128_concat) CollectionId => Vec<T::AccountId>;253        /// Whitelisted collection users254        /// Collection id (controlled?2), user id (controlled?3)255        pub WhiteList get(fn white_list): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) T::AccountId => bool;256        //#endregion257258        /// How many of collection items user have259        /// Collection id (controlled?2), account id (real)260        pub Balance get(fn balance_count): double_map hasher(blake2_128_concat) CollectionId, hasher(twox_64_concat) T::AccountId => u128;261262        /// Amount of items which spender can transfer out of owners account (via transferFrom)263        /// Collection id (controlled?2), (token id (controlled ?2) + owner account id (real) + spender account id (controlled?3))264        /// TODO: Off chain worker should remove from this map when token gets removed265        pub Allowances get(fn approved): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) (TokenId, T::AccountId, T::AccountId) => u128;266267        //#region Item collections268        /// Collection id (controlled?2), token id (controlled?1)269        pub NftItemList get(fn nft_item_id) config(): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => Option<NftItemType<T::AccountId>>;270        /// Collection id (controlled?2), owner (controlled?2)271        pub FungibleItemList get(fn fungible_item_id) config(): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) T::AccountId => FungibleItemType;272        /// Collection id (controlled?2), token id (controlled?1)273        pub ReFungibleItemList get(fn refungible_item_id) config(): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => Option<ReFungibleItemType<T::AccountId>>;274        //#endregion275276        //#region Index list277        /// Collection id (controlled?2), tokens owner (controlled?2)278        pub AddressTokens get(fn address_tokens): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) T::AccountId => Vec<TokenId>;279        //#endregion280281        //#region Tokens transfer rate limit baskets282        /// (Collection id (controlled?2), who created (real))283        /// TODO: Off chain worker should remove from this map when collection gets removed284        pub CreateItemBasket get(fn create_item_basket): map hasher(blake2_128_concat) (CollectionId, T::AccountId) => T::BlockNumber;285        /// Collection id (controlled?2), token id (controlled?2)286        pub NftTransferBasket get(fn nft_transfer_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => T::BlockNumber;287        /// Collection id (controlled?2), owning user (real)288        pub FungibleTransferBasket get(fn fungible_transfer_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(twox_64_concat) T::AccountId => T::BlockNumber;289        /// Collection id (controlled?2), token id (controlled?2)290        pub ReFungibleTransferBasket get(fn refungible_transfer_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => T::BlockNumber;291        //#endregion292293        /// Variable metadata sponsoring294        /// Collection id (controlled?2), token id (controlled?2)295        pub VariableMetaDataBasket get(fn variable_meta_data_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => Option<T::BlockNumber> = None;296      297        //#region Contract Sponsorship and Ownership298        /// Contract address (real)299        pub ContractOwner get(fn contract_owner): map hasher(twox_64_concat) T::AccountId => Option<T::AccountId>;300        /// Contract address (real)301        pub ContractSelfSponsoring get(fn contract_self_sponsoring): map hasher(twox_64_concat) T::AccountId => bool;302        /// (Contract address(real), caller (real))303        pub ContractSponsorBasket get(fn contract_sponsor_basket): map hasher(twox_64_concat) (T::AccountId, T::AccountId) => T::BlockNumber;304        /// Contract address (real)305        pub ContractSponsoringRateLimit get(fn contract_sponsoring_rate_limit): map hasher(twox_64_concat) T::AccountId => T::BlockNumber;306        /// Contract address (real)307        pub ContractWhiteListEnabled get(fn contract_white_list_enabled): map hasher(twox_64_concat) T::AccountId => bool; 308        /// Contract address (real) => Whitelisted user (controlled?3)309        pub ContractWhiteList get(fn contract_white_list): double_map hasher(twox_64_concat) T::AccountId, hasher(blake2_128_concat) T::AccountId => bool; 310        //#endregion311    }312    add_extra_genesis {313        build(|config: &GenesisConfig<T>| {314            // Modification of storage315            for (_num, _c) in &config.collection_id {316                <Module<T>>::init_collection(_c);317            }318319            for (_num, _c, _i) in &config.nft_item_id {320                <Module<T>>::init_nft_token(*_c, _i);321            }322323            for (collection_id, account_id, fungible_item) in &config.fungible_item_id {324                <Module<T>>::init_fungible_token(*collection_id, account_id, fungible_item);325            }326327            for (_num, _c, _i) in &config.refungible_item_id {328                <Module<T>>::init_refungible_token(*_c, _i);329            }330        })331    }332}333334decl_event!(335    pub enum Event<T>336    where337        AccountId = <T as system::Config>::AccountId,338    {339        /// New collection was created340        /// 341        /// # Arguments342        /// 343        /// * collection_id: Globally unique identifier of newly created collection.344        /// 345        /// * mode: [CollectionMode] converted into u8.346        /// 347        /// * account_id: Collection owner.348        CollectionCreated(CollectionId, u8, AccountId),349350        /// New item was created.351        /// 352        /// # Arguments353        /// 354        /// * collection_id: Id of the collection where item was created.355        /// 356        /// * item_id: Id of an item. Unique within the collection.357        ///358        /// * recipient: Owner of newly created item 359        ItemCreated(CollectionId, TokenId, AccountId),360361        /// Collection item was burned.362        /// 363        /// # Arguments364        /// 365        /// collection_id.366        /// 367        /// item_id: Identifier of burned NFT.368        ItemDestroyed(CollectionId, TokenId),369370        /// Item was transferred371        ///372        /// * collection_id: Id of collection to which item is belong373        ///374        /// * item_id: Id of an item375        ///376        /// * sender: Original owner of item377        ///378        /// * recipient: New owner of item379        ///380        /// * amount: Always 1 for NFT381        Transfer(CollectionId, TokenId, AccountId, AccountId, u128),382383        /// * collection_id384        ///385        /// * item_id386        ///387        /// * sender388        ///389        /// * spender390        ///391        /// * amount392        Approved(CollectionId, TokenId, AccountId, AccountId, u128),393    }394);395396decl_module! {397    pub struct Module<T: Config> for enum Call 398    where 399        origin: T::Origin400    {401        fn deposit_event() = default;402        type Error = Error<T>;403404        fn on_initialize(_now: T::BlockNumber) -> Weight {405            0406        }407408        /// 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.409        /// 410        /// # Permissions411        /// 412        /// * Anyone.413        /// 414        /// # Arguments415        /// 416        /// * collection_name: UTF-16 string with collection name (limit 64 characters), will be stored as zero-terminated.417        /// 418        /// * collection_description: UTF-16 string with collection description (limit 256 characters), will be stored as zero-terminated.419        /// 420        /// * token_prefix: UTF-8 string with token prefix.421        /// 422        /// * mode: [CollectionMode] collection type and type dependent data.423        // returns collection ID424        #[weight = <T as Config>::WeightInfo::create_collection()]425        #[transactional]426        pub fn create_collection(origin,427                                 collection_name: Vec<u16>,428                                 collection_description: Vec<u16>,429                                 token_prefix: Vec<u8>,430                                 mode: CollectionMode) -> DispatchResult {431432            // Anyone can create a collection433            let who = ensure_signed(origin)?;434435            // Take a (non-refundable) deposit of collection creation436            let mut imbalance = <<<T as Config>::Currency as Currency<T::AccountId>>::PositiveImbalance>::zero();437            imbalance.subsume(<<T as Config>::Currency as Currency<T::AccountId>>::deposit_creating(438                &T::TreasuryAccountId::get(),439                T::CollectionCreationPrice::get(),440            ));441            <T as Config>::Currency::settle(442                &who,443                imbalance,444                WithdrawReasons::TRANSFER,445                ExistenceRequirement::KeepAlive,446            ).map_err(|_| Error::<T>::NoPermission)?;447448            let decimal_points = match mode {449                CollectionMode::Fungible(points) => points,450                _ => 0451            };452453            let chain_limit = ChainLimit::get();454455            let created_count = CreatedCollectionCount::get();456            let destroyed_count = DestroyedCollectionCount::get();457458            // bound Total number of collections459            ensure!(created_count - destroyed_count < chain_limit.collection_numbers_limit, Error::<T>::TotalCollectionsLimitExceeded);460461            // check params462            ensure!(decimal_points <= MAX_DECIMAL_POINTS, Error::<T>::CollectionDecimalPointLimitExceeded);463            ensure!(collection_name.len() <= 64, Error::<T>::CollectionNameLimitExceeded);464            ensure!(collection_description.len() <= 256, Error::<T>::CollectionDescriptionLimitExceeded);465            ensure!(token_prefix.len() <= 16, Error::<T>::CollectionTokenPrefixLimitExceeded);466467            // Generate next collection ID468            let next_id = created_count469                .checked_add(1)470                .ok_or(Error::<T>::NumOverflow)?;471472            CreatedCollectionCount::put(next_id);473474            let limits = CollectionLimits {475                sponsored_data_size: chain_limit.custom_data_limit,476                ..Default::default()477            };478479            // Create new collection480            let new_collection = Collection {481                owner: who.clone(),482                name: collection_name,483                mode: mode.clone(),484                mint_mode: false,485                access: AccessMode::Normal,486                description: collection_description,487                decimal_points: decimal_points,488                token_prefix: token_prefix,489                offchain_schema: Vec::new(),490                schema_version: SchemaVersion::ImageURL,491                sponsorship: SponsorshipState::Disabled,492                variable_on_chain_schema: Vec::new(),493                const_on_chain_schema: Vec::new(),494                limits,495            };496497            // Add new collection to map498            <CollectionById<T>>::insert(next_id, new_collection);499500            // call event501            Self::deposit_event(RawEvent::CollectionCreated(next_id, mode.into(), who.clone()));502503            Ok(())504        }505506        /// **DANGEROUS**: Destroys collection and all NFTs within this collection. Users irrecoverably lose their assets and may lose real money.507        /// 508        /// # Permissions509        /// 510        /// * Collection Owner.511        /// 512        /// # Arguments513        /// 514        /// * collection_id: collection to destroy.515        #[weight = <T as Config>::WeightInfo::destroy_collection()]516        #[transactional]517        pub fn destroy_collection(origin, collection_id: CollectionId) -> DispatchResult {518519            let sender = ensure_signed(origin)?;520            let collection = Self::get_collection(collection_id)?;521            Self::check_owner_permissions(&collection, sender)?;522            if !collection.limits.owner_can_destroy {523                fail!(Error::<T>::NoPermission);524            }525526            <AddressTokens<T>>::remove_prefix(collection_id);527            <Allowances<T>>::remove_prefix(collection_id);528            <Balance<T>>::remove_prefix(collection_id);529            <ItemListIndex>::remove(collection_id);530            <AdminList<T>>::remove(collection_id);531            <CollectionById<T>>::remove(collection_id);532            <WhiteList<T>>::remove_prefix(collection_id);533534            <NftItemList<T>>::remove_prefix(collection_id);535            <FungibleItemList<T>>::remove_prefix(collection_id);536            <ReFungibleItemList<T>>::remove_prefix(collection_id);537538            <NftTransferBasket<T>>::remove_prefix(collection_id);539            <FungibleTransferBasket<T>>::remove_prefix(collection_id);540            <ReFungibleTransferBasket<T>>::remove_prefix(collection_id);541542            <VariableMetaDataBasket<T>>::remove_prefix(collection_id);543544            DestroyedCollectionCount::put(DestroyedCollectionCount::get()545                .checked_add(1)546                .ok_or(Error::<T>::NumOverflow)?);547548            Ok(())549        }550551        /// Add an address to white list.552        /// 553        /// # Permissions554        /// 555        /// * Collection Owner556        /// * Collection Admin557        /// 558        /// # Arguments559        /// 560        /// * collection_id.561        /// 562        /// * address.563        #[weight = <T as Config>::WeightInfo::add_to_white_list()]564        #[transactional]565        pub fn add_to_white_list(origin, collection_id: CollectionId, address: T::AccountId) -> DispatchResult{566567            let sender = ensure_signed(origin)?;568            let collection = Self::get_collection(collection_id)?;569570            Self::toggle_white_list_internal(571                &sender,572                &collection,573                &address,574                true,575            )?;576577            Ok(())578        }579580        /// Remove an address from white list.581        /// 582        /// # Permissions583        /// 584        /// * Collection Owner585        /// * Collection Admin586        /// 587        /// # Arguments588        /// 589        /// * collection_id.590        /// 591        /// * address.592        #[weight = <T as Config>::WeightInfo::remove_from_white_list()]593        #[transactional]594        pub fn remove_from_white_list(origin, collection_id: CollectionId, address: T::AccountId) -> DispatchResult{595596            let sender = ensure_signed(origin)?;597            let collection = Self::get_collection(collection_id)?;598599            Self::toggle_white_list_internal(600                &sender,601                &collection,602                &address,603                false,604            )?;605606            Ok(())607        }608609        /// Toggle between normal and white list access for the methods with access for `Anyone`.610        /// 611        /// # Permissions612        /// 613        /// * Collection Owner.614        /// 615        /// # Arguments616        /// 617        /// * collection_id.618        /// 619        /// * mode: [AccessMode]620        #[weight = <T as Config>::WeightInfo::set_public_access_mode()]621        #[transactional]622        pub fn set_public_access_mode(origin, collection_id: CollectionId, mode: AccessMode) -> DispatchResult623        {624            let sender = ensure_signed(origin)?;625626            let mut target_collection = Self::get_collection(collection_id)?;627            Self::check_owner_permissions(&target_collection, sender)?;628            target_collection.access = mode;629            Self::save_collection(target_collection);630631            Ok(())632        }633634        /// Allows Anyone to create tokens if:635        /// * White List is enabled, and636        /// * Address is added to white list, and637        /// * This method was called with True parameter638        /// 639        /// # Permissions640        /// * Collection Owner641        ///642        /// # Arguments643        /// 644        /// * collection_id.645        /// 646        /// * mint_permission: Boolean parameter. If True, allows minting to Anyone with conditions above.647        #[weight = <T as Config>::WeightInfo::set_mint_permission()]648        #[transactional]649        pub fn set_mint_permission(origin, collection_id: CollectionId, mint_permission: bool) -> DispatchResult650        {651            let sender = ensure_signed(origin)?;652653            let mut target_collection = Self::get_collection(collection_id)?;654            Self::check_owner_permissions(&target_collection, sender)?;655            target_collection.mint_mode = mint_permission;656            Self::save_collection(target_collection);657658            Ok(())659        }660661        /// Change the owner of the collection.662        /// 663        /// # Permissions664        /// 665        /// * Collection Owner.666        /// 667        /// # Arguments668        /// 669        /// * collection_id.670        /// 671        /// * new_owner.672        #[weight = <T as Config>::WeightInfo::change_collection_owner()]673        #[transactional]674        pub fn change_collection_owner(origin, collection_id: CollectionId, new_owner: T::AccountId) -> DispatchResult {675676            let sender = ensure_signed(origin)?;677            let mut target_collection = Self::get_collection(collection_id)?;678            Self::check_owner_permissions(&target_collection, sender)?;679            target_collection.owner = new_owner;680            Self::save_collection(target_collection);681682            Ok(())683        }684685        /// Adds an admin of the Collection.686        /// 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. 687        /// 688        /// # Permissions689        /// 690        /// * Collection Owner.691        /// * Collection Admin.692        /// 693        /// # Arguments694        /// 695        /// * collection_id: ID of the Collection to add admin for.696        /// 697        /// * new_admin_id: Address of new admin to add.698        #[weight = <T as Config>::WeightInfo::add_collection_admin()]699        #[transactional]700        pub fn add_collection_admin(origin, collection_id: CollectionId, new_admin_id: T::AccountId) -> DispatchResult {701702            let sender = ensure_signed(origin)?;703            let collection = Self::get_collection(collection_id)?;704            Self::check_owner_or_admin_permissions(&collection, sender)?;705            let mut admin_arr = <AdminList<T>>::get(collection_id);706707            match admin_arr.binary_search(&new_admin_id) {708                Ok(_) => {},709                Err(idx) => {710                    let limits = ChainLimit::get();711                    ensure!(admin_arr.len() < limits.collections_admins_limit as usize, Error::<T>::CollectionAdminsLimitExceeded);712                    admin_arr.insert(idx, new_admin_id);713                    <AdminList<T>>::insert(collection_id, admin_arr);714                }715            }716            Ok(())717        }718719        /// 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.720        ///721        /// # Permissions722        /// 723        /// * Collection Owner.724        /// * Collection Admin.725        /// 726        /// # Arguments727        /// 728        /// * collection_id: ID of the Collection to remove admin for.729        /// 730        /// * account_id: Address of admin to remove.731        #[weight = <T as Config>::WeightInfo::remove_collection_admin()]732        #[transactional]733        pub fn remove_collection_admin(origin, collection_id: CollectionId, account_id: T::AccountId) -> DispatchResult {734735            let sender = ensure_signed(origin)?;736            let collection = Self::get_collection(collection_id)?;737            Self::check_owner_or_admin_permissions(&collection, sender)?;738            let mut admin_arr = <AdminList<T>>::get(collection_id);739740            match admin_arr.binary_search(&account_id) {741                Ok(idx) => {742                    admin_arr.remove(idx);743                    <AdminList<T>>::insert(collection_id, admin_arr);744                },745                Err(_) => {}746            }747            Ok(())748        }749750        /// # Permissions751        /// 752        /// * Collection Owner753        /// 754        /// # Arguments755        /// 756        /// * collection_id.757        /// 758        /// * new_sponsor.759        #[weight = <T as Config>::WeightInfo::set_collection_sponsor()]760        #[transactional]761        pub fn set_collection_sponsor(origin, collection_id: CollectionId, new_sponsor: T::AccountId) -> DispatchResult {762763            let sender = ensure_signed(origin)?;764            let mut target_collection = Self::get_collection(collection_id)?;765            Self::check_owner_permissions(&target_collection, sender)?;766767            target_collection.sponsorship = SponsorshipState::Unconfirmed(new_sponsor);768            Self::save_collection(target_collection);769770            Ok(())771        }772773        /// # Permissions774        /// 775        /// * Sponsor.776        /// 777        /// # Arguments778        /// 779        /// * collection_id.780        #[weight = <T as Config>::WeightInfo::confirm_sponsorship()]781        #[transactional]782        pub fn confirm_sponsorship(origin, collection_id: CollectionId) -> DispatchResult {783784            let sender = ensure_signed(origin)?;785786            let mut target_collection = Self::get_collection(collection_id)?;787            ensure!(788                target_collection.sponsorship.pending_sponsor() == Some(&sender),789                Error::<T>::ConfirmUnsetSponsorFail790            );791792            target_collection.sponsorship = SponsorshipState::Confirmed(sender);793            Self::save_collection(target_collection);794795            Ok(())796        }797798        /// Switch back to pay-per-own-transaction model.799        ///800        /// # Permissions801        ///802        /// * Collection owner.803        /// 804        /// # Arguments805        /// 806        /// * collection_id.807        #[weight = <T as Config>::WeightInfo::remove_collection_sponsor()]808        #[transactional]809        pub fn remove_collection_sponsor(origin, collection_id: CollectionId) -> DispatchResult {810811            let sender = ensure_signed(origin)?;812813            let mut target_collection = Self::get_collection(collection_id)?;814            Self::check_owner_permissions(&target_collection, sender)?;815816            target_collection.sponsorship = SponsorshipState::Disabled;817            Self::save_collection(target_collection);818819            Ok(())820        }821822        /// This method creates a concrete instance of NFT Collection created with CreateCollection method.823        /// 824        /// # Permissions825        /// 826        /// * Collection Owner.827        /// * Collection Admin.828        /// * Anyone if829        ///     * White List is enabled, and830        ///     * Address is added to white list, and831        ///     * MintPermission is enabled (see SetMintPermission method)832        /// 833        /// # Arguments834        /// 835        /// * collection_id: ID of the collection.836        /// 837        /// * owner: Address, initial owner of the NFT.838        ///839        /// * data: Token data to store on chain.840        // #[weight =841        // (130_000_000 as Weight)842        // .saturating_add((2135 as Weight).saturating_mul((properties.len() as u64) as Weight))843        // .saturating_add(RocksDbWeight::get().reads(10 as Weight))844        // .saturating_add(RocksDbWeight::get().writes(8 as Weight))]845846        #[weight = <T as Config>::WeightInfo::create_item(data.len())]847        #[transactional]848        pub fn create_item(origin, collection_id: CollectionId, owner: T::AccountId, data: CreateItemData) -> DispatchResult {849            let sender = ensure_signed(origin)?;850            Self::create_item_internal(sender, collection_id, owner, data)851        }852853        /// This method creates multiple items in a collection created with CreateCollection method.854        /// 855        /// # Permissions856        /// 857        /// * Collection Owner.858        /// * Collection Admin.859        /// * Anyone if860        ///     * White List is enabled, and861        ///     * Address is added to white list, and862        ///     * MintPermission is enabled (see SetMintPermission method)863        /// 864        /// # Arguments865        /// 866        /// * collection_id: ID of the collection.867        /// 868        /// * itemsData: Array items properties. Each property is an array of bytes itself, see [create_item].869        /// 870        /// * owner: Address, initial owner of the NFT.871        #[weight = <T as Config>::WeightInfo::create_item(items_data.into_iter()872                               .map(|data| { data.len() })873                               .sum())]874        #[transactional]875        pub fn create_multiple_items(origin, collection_id: CollectionId, owner: T::AccountId, items_data: Vec<CreateItemData>) -> DispatchResult {876877            ensure!(items_data.len() > 0, Error::<T>::EmptyArgument);878            let sender = ensure_signed(origin)?;879880            let target_collection = Self::get_collection(collection_id)?;881882            Self::can_create_items_in_collection(&target_collection, &sender, &owner, items_data.len() as u32)?;883884            for data in &items_data {885                Self::validate_create_item_args(&target_collection, data)?;886            }887            for data in &items_data {888                Self::create_item_no_validation(&target_collection, owner.clone(), data.clone())?;889            }890891            Ok(())892        }893894        /// Destroys a concrete instance of NFT.895        /// 896        /// # Permissions897        /// 898        /// * Collection Owner.899        /// * Collection Admin.900        /// * Current NFT Owner.901        /// 902        /// # Arguments903        /// 904        /// * collection_id: ID of the collection.905        /// 906        /// * item_id: ID of NFT to burn.907        #[weight = <T as Config>::WeightInfo::burn_item()]908        #[transactional]909        pub fn burn_item(origin, collection_id: CollectionId, item_id: TokenId, value: u128) -> DispatchResult {910911            let sender = ensure_signed(origin)?;912913            // Transfer permissions check914            let target_collection = Self::get_collection(collection_id)?;915            ensure!(916                Self::is_item_owner(sender.clone(), &target_collection, item_id) ||917                (918                    target_collection.limits.owner_can_transfer &&919                    Self::is_owner_or_admin_permissions(&target_collection, sender.clone())920                ),921                Error::<T>::NoPermission922            );923924            if target_collection.access == AccessMode::WhiteList {925                Self::check_white_list(&target_collection, &sender)?;926            }927928            match target_collection.mode929            {930                CollectionMode::NFT => Self::burn_nft_item(&target_collection, item_id)?,931                CollectionMode::Fungible(_)  => Self::burn_fungible_item(&sender, &target_collection, value)?,932                CollectionMode::ReFungible  => Self::burn_refungible_item(&target_collection, item_id, &sender)?,933                _ => ()934            };935936            // call event937            Self::deposit_event(RawEvent::ItemDestroyed(target_collection.id, item_id));938939            Ok(())940        }941942        /// Change ownership of the token.943        /// 944        /// # Permissions945        /// 946        /// * Collection Owner947        /// * Collection Admin948        /// * Current NFT owner949        ///950        /// # Arguments951        /// 952        /// * recipient: Address of token recipient.953        /// 954        /// * collection_id.955        /// 956        /// * item_id: ID of the item957        ///     * Non-Fungible Mode: Required.958        ///     * Fungible Mode: Ignored.959        ///     * Re-Fungible Mode: Required.960        /// 961        /// * value: Amount to transfer.962        ///     * Non-Fungible Mode: Ignored963        ///     * Fungible Mode: Must specify transferred amount964        ///     * Re-Fungible Mode: Must specify transferred portion (between 0 and 1)965        #[weight = <T as Config>::WeightInfo::transfer()]966        #[transactional]967        pub fn transfer(origin, recipient: T::AccountId, collection_id: CollectionId, item_id: TokenId, value: u128) -> DispatchResult {968            let sender = ensure_signed(origin)?;969            let collection = Self::get_collection(collection_id)?;970971            Self::transfer_internal(sender, recipient, &collection, item_id, value)972        }973974        /// Set, change, or remove approved address to transfer the ownership of the NFT.975        /// 976        /// # Permissions977        /// 978        /// * Collection Owner979        /// * Collection Admin980        /// * Current NFT owner981        /// 982        /// # Arguments983        /// 984        /// * approved: Address that is approved to transfer this NFT or zero (if needed to remove approval).985        /// 986        /// * collection_id.987        /// 988        /// * item_id: ID of the item.989        #[weight = <T as Config>::WeightInfo::approve()]990        #[transactional]991        pub fn approve(origin, spender: T::AccountId, collection_id: CollectionId, item_id: TokenId, amount: u128) -> DispatchResult {992993            let sender = ensure_signed(origin)?;994            let collection = Self::get_collection(collection_id)?;995996            Self::approve_internal(sender, spender, &collection, item_id, amount)?;997998            Ok(())999        }1000        1001        /// 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.1002        /// 1003        /// # Permissions1004        /// * Collection Owner1005        /// * Collection Admin1006        /// * Current NFT owner1007        /// * Address approved by current NFT owner1008        /// 1009        /// # Arguments1010        /// 1011        /// * from: Address that owns token.1012        /// 1013        /// * recipient: Address of token recipient.1014        /// 1015        /// * collection_id.1016        /// 1017        /// * item_id: ID of the item.1018        /// 1019        /// * value: Amount to transfer.1020        #[weight = <T as Config>::WeightInfo::transfer_from()]1021        #[transactional]1022        pub fn transfer_from(origin, from: T::AccountId, recipient: T::AccountId, collection_id: CollectionId, item_id: TokenId, value: u128 ) -> DispatchResult {10231024            let sender = ensure_signed(origin)?;1025            let collection = Self::get_collection(collection_id)?;10261027            Self::transfer_from_internal(sender, from, recipient, &collection, item_id, value)?;10281029            Ok(())1030        }10311032        // #[weight = 0]1033        // pub fn safe_transfer_from(origin, collection_id: CollectionId, item_id: TokenId, new_owner: T::AccountId) -> DispatchResult {10341035        //     // let no_perm_mes = "You do not have permissions to modify this collection";1036        //     // ensure!(<ApprovedList<T>>::contains_key((collection_id, item_id)), no_perm_mes);1037        //     // let list_itm = <ApprovedList<T>>::get((collection_id, item_id));1038        //     // ensure!(list_itm.contains(&new_owner.clone()), no_perm_mes);10391040        //     // // on_nft_received  call10411042        //     // Self::transfer(origin, collection_id, item_id, new_owner)?;10431044        //     Ok(())1045        // }10461047        /// Set off-chain data schema.1048        /// 1049        /// # Permissions1050        /// 1051        /// * Collection Owner1052        /// * Collection Admin1053        /// 1054        /// # Arguments1055        /// 1056        /// * collection_id.1057        /// 1058        /// * schema: String representing the offchain data schema.1059        #[weight = <T as Config>::WeightInfo::set_variable_meta_data()]1060        #[transactional]1061        pub fn set_variable_meta_data (1062            origin,1063            collection_id: CollectionId,1064            item_id: TokenId,1065            data: Vec<u8>1066        ) -> DispatchResult {1067            let sender = ensure_signed(origin)?;1068            1069            let collection = Self::get_collection(collection_id)?;10701071            Self::set_variable_meta_data_internal(sender, &collection, item_id, data)?;10721073            Ok(())1074        }1075 1076        /// Set schema standard1077        /// ImageURL1078        /// Unique1079        /// 1080        /// # Permissions1081        /// 1082        /// * Collection Owner1083        /// * Collection Admin1084        /// 1085        /// # Arguments1086        /// 1087        /// * collection_id.1088        /// 1089        /// * schema: SchemaVersion: enum1090        #[weight = <T as Config>::WeightInfo::set_schema_version()]1091        #[transactional]1092        pub fn set_schema_version(1093            origin,1094            collection_id: CollectionId,1095            version: SchemaVersion1096        ) -> DispatchResult {1097            let sender = ensure_signed(origin)?;1098            let mut target_collection = Self::get_collection(collection_id)?;1099            Self::check_owner_or_admin_permissions(&target_collection, sender.clone())?;1100            target_collection.schema_version = version;1101            Self::save_collection(target_collection);11021103            Ok(())1104        }11051106        /// Set off-chain data schema.1107        /// 1108        /// # Permissions1109        /// 1110        /// * Collection Owner1111        /// * Collection Admin1112        /// 1113        /// # Arguments1114        /// 1115        /// * collection_id.1116        /// 1117        /// * schema: String representing the offchain data schema.1118        #[weight = <T as Config>::WeightInfo::set_offchain_schema()]1119        #[transactional]1120        pub fn set_offchain_schema(1121            origin,1122            collection_id: CollectionId,1123            schema: Vec<u8>1124        ) -> DispatchResult {1125            let sender = ensure_signed(origin)?;1126            let mut target_collection = Self::get_collection(collection_id)?;1127            Self::check_owner_or_admin_permissions(&target_collection, sender.clone())?;11281129            // check schema limit1130            ensure!(schema.len() as u32 <= ChainLimit::get().offchain_schema_limit, "");11311132            target_collection.offchain_schema = schema;1133            Self::save_collection(target_collection);11341135            Ok(())1136        }11371138        /// Set const on-chain data schema.1139        /// 1140        /// # Permissions1141        /// 1142        /// * Collection Owner1143        /// * Collection Admin1144        /// 1145        /// # Arguments1146        /// 1147        /// * collection_id.1148        /// 1149        /// * schema: String representing the const on-chain data schema.1150        #[weight = <T as Config>::WeightInfo::set_const_on_chain_schema()]1151        #[transactional]1152        pub fn set_const_on_chain_schema (1153            origin,1154            collection_id: CollectionId,1155            schema: Vec<u8>1156        ) -> DispatchResult {1157            let sender = ensure_signed(origin)?;1158            let mut target_collection = Self::get_collection(collection_id)?;1159            Self::check_owner_or_admin_permissions(&target_collection, sender.clone())?;11601161            // check schema limit1162            ensure!(schema.len() as u32 <= ChainLimit::get().const_on_chain_schema_limit, "");11631164            target_collection.const_on_chain_schema = schema;1165            Self::save_collection(target_collection);11661167            Ok(())1168        }11691170        /// Set variable on-chain data schema.1171        /// 1172        /// # Permissions1173        /// 1174        /// * Collection Owner1175        /// * Collection Admin1176        /// 1177        /// # Arguments1178        /// 1179        /// * collection_id.1180        /// 1181        /// * schema: String representing the variable on-chain data schema.1182        #[weight = <T as Config>::WeightInfo::set_const_on_chain_schema()]1183        #[transactional]1184        pub fn set_variable_on_chain_schema (1185            origin,1186            collection_id: CollectionId,1187            schema: Vec<u8>1188        ) -> DispatchResult {1189            let sender = ensure_signed(origin)?;1190            let mut target_collection = Self::get_collection(collection_id)?;1191            Self::check_owner_or_admin_permissions(&target_collection, sender.clone())?;11921193            // check schema limit1194            ensure!(schema.len() as u32 <= ChainLimit::get().variable_on_chain_schema_limit, "");11951196            target_collection.variable_on_chain_schema = schema;1197            Self::save_collection(target_collection);11981199            Ok(())1200        }12011202        // Sudo permissions function1203        #[weight = <T as Config>::WeightInfo::set_chain_limits()]1204        #[transactional]1205        pub fn set_chain_limits(1206            origin,1207            limits: ChainLimits1208        ) -> DispatchResult {12091210            #[cfg(not(feature = "runtime-benchmarks"))]1211            ensure_root(origin)?;12121213            <ChainLimit>::put(limits);1214            Ok(())1215        }12161217        /// Enable smart contract self-sponsoring.1218        /// 1219        /// # Permissions1220        /// 1221        /// * Contract Owner1222        /// 1223        /// # Arguments1224        /// 1225        /// * contract address1226        /// * enable flag1227        /// 1228        #[weight = <T as Config>::WeightInfo::enable_contract_sponsoring()]1229        #[transactional]1230        pub fn enable_contract_sponsoring(1231            origin,1232            contract_address: T::AccountId,1233            enable: bool1234        ) -> DispatchResult {12351236            let sender = ensure_signed(origin)?;12371238            #[cfg(feature = "runtime-benchmarks")]1239            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());12401241            Self::ensure_contract_owned(sender, &contract_address)?;12421243            <ContractSelfSponsoring<T>>::insert(contract_address, enable);1244            Ok(())1245        }12461247        /// Set the rate limit for contract sponsoring to specified number of blocks.1248        /// 1249        /// If not set (has the default value of 0 blocks), the sponsoring will be disabled. 1250        /// If set to the number B (for blocks), the transactions will be sponsored with a rate 1251        /// limit of B, i.e. fees for every transaction sent to this smart contract will be paid 1252        /// from contract endowment if there are at least B blocks between such transactions. 1253        /// Nonetheless, if transactions are sent more frequently, the fees are paid by the sender.1254        /// 1255        /// # Permissions1256        /// 1257        /// * Contract Owner1258        /// 1259        /// # Arguments1260        /// 1261        /// -`contract_address`: Address of the contract to sponsor1262        /// -`rate_limit`: Number of blocks to wait until the next sponsored transaction is allowed1263        /// 1264        #[weight = <T as Config>::WeightInfo::set_contract_sponsoring_rate_limit()]1265        #[transactional]1266        pub fn set_contract_sponsoring_rate_limit(1267            origin,1268            contract_address: T::AccountId,1269            rate_limit: T::BlockNumber1270        ) -> DispatchResult {1271            let sender = ensure_signed(origin)?;12721273            #[cfg(feature = "runtime-benchmarks")]1274            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());12751276            Self::ensure_contract_owned(sender, &contract_address)?;1277            <ContractSponsoringRateLimit<T>>::insert(contract_address, rate_limit);1278            Ok(())1279        }12801281        /// Enable the white list for a contract. Only addresses added to the white list with addToContractWhiteList will be able to call this smart contract.1282        /// 1283        /// # Permissions1284        /// 1285        /// * Address that deployed smart contract.1286        /// 1287        /// # Arguments1288        /// 1289        /// -`contract_address`: Address of the contract.1290        /// 1291        /// - `enable`: .  1292        #[weight = <T as Config>::WeightInfo::toggle_contract_white_list()]1293        #[transactional]1294        pub fn toggle_contract_white_list(1295            origin,1296            contract_address: T::AccountId,1297            enable: bool1298        ) -> DispatchResult {1299            let sender = ensure_signed(origin)?;13001301            #[cfg(feature = "runtime-benchmarks")]1302            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());13031304            Self::ensure_contract_owned(sender, &contract_address)?;1305            if enable {1306                <ContractWhiteListEnabled<T>>::insert(contract_address, true);1307            } else {1308                <ContractWhiteListEnabled<T>>::remove(contract_address);1309            }1310            Ok(())1311        }1312        1313        /// Add an address to smart contract white list.1314        /// 1315        /// # Permissions1316        /// 1317        /// * Address that deployed smart contract.1318        /// 1319        /// # Arguments1320        /// 1321        /// -`contract_address`: Address of the contract.1322        ///1323        /// -`account_address`: Address to add.1324        #[weight = <T as Config>::WeightInfo::add_to_contract_white_list()]1325        #[transactional]1326        pub fn add_to_contract_white_list(1327            origin,1328            contract_address: T::AccountId,1329            account_address: T::AccountId1330        ) -> DispatchResult {1331            let sender = ensure_signed(origin)?;13321333            #[cfg(feature = "runtime-benchmarks")]1334            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());1335            1336            Self::ensure_contract_owned(sender, &contract_address)?;      1337            <ContractWhiteList<T>>::insert(contract_address, account_address, true);1338            Ok(())1339        }13401341        /// Remove an address from smart contract white list.1342        /// 1343        /// # Permissions1344        /// 1345        /// * Address that deployed smart contract.1346        /// 1347        /// # Arguments1348        /// 1349        /// -`contract_address`: Address of the contract.1350        ///1351        /// -`account_address`: Address to remove.1352        #[weight = <T as Config>::WeightInfo::remove_from_contract_white_list()]1353        #[transactional]1354        pub fn remove_from_contract_white_list(1355            origin,1356            contract_address: T::AccountId,1357            account_address: T::AccountId1358        ) -> DispatchResult {1359            let sender = ensure_signed(origin)?;13601361            #[cfg(feature = "runtime-benchmarks")]1362            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());13631364            Self::ensure_contract_owned(sender, &contract_address)?;1365            <ContractWhiteList<T>>::remove(contract_address, account_address);1366            Ok(())1367        }13681369        #[weight = <T as Config>::WeightInfo::set_collection_limits()]1370        #[transactional]1371        pub fn set_collection_limits(1372            origin,1373            collection_id: u32,1374            new_limits: CollectionLimits<T::BlockNumber>,1375        ) -> DispatchResult {1376            let sender = ensure_signed(origin)?;1377            let mut target_collection = Self::get_collection(collection_id)?;1378            Self::check_owner_permissions(&target_collection, sender.clone())?;1379            let old_limits = &target_collection.limits;1380            let chain_limits = ChainLimit::get();13811382            // collection bounds1383            ensure!(new_limits.sponsor_transfer_timeout <= MAX_SPONSOR_TIMEOUT &&1384                new_limits.account_token_ownership_limit <= MAX_TOKEN_OWNERSHIP && 1385                new_limits.sponsored_data_size <= chain_limits.custom_data_limit,1386                Error::<T>::CollectionLimitBoundsExceeded);13871388            // token_limit   check  prev1389            ensure!(old_limits.token_limit >= new_limits.token_limit, Error::<T>::CollectionTokenLimitExceeded);1390            ensure!(new_limits.token_limit > 0, Error::<T>::CollectionTokenLimitExceeded);13911392            ensure!(1393                (old_limits.owner_can_transfer || !new_limits.owner_can_transfer) &&1394                (old_limits.owner_can_destroy || !new_limits.owner_can_destroy),1395                Error::<T>::OwnerPermissionsCantBeReverted,1396            );13971398            target_collection.limits = new_limits;1399            Self::save_collection(target_collection);14001401            Ok(())1402        } 1403    }1404}14051406impl<T: Config> Module<T> {1407    pub fn create_item_internal(sender: T::AccountId, collection_id: CollectionId, owner: T::AccountId, data: CreateItemData) -> DispatchResult {1408        let target_collection = Self::get_collection(collection_id)?;14091410        Self::can_create_items_in_collection(&target_collection, &sender, &owner, 1)?;1411        Self::validate_create_item_args(&target_collection, &data)?;1412        Self::create_item_no_validation(&target_collection, owner, data)?;14131414        Ok(())1415    }14161417    pub fn transfer_internal(sender: T::AccountId, recipient: T::AccountId, target_collection: &CollectionHandle<T>, item_id: TokenId, value: u128) -> DispatchResult {1418        // Limits check1419        Self::is_correct_transfer(target_collection, &recipient)?;14201421        // Transfer permissions check1422        ensure!(Self::is_item_owner(sender.clone(), target_collection, item_id) ||1423            Self::is_owner_or_admin_permissions(target_collection, sender.clone()),1424            Error::<T>::NoPermission);14251426        if target_collection.access == AccessMode::WhiteList {1427            Self::check_white_list(target_collection, &sender)?;1428            Self::check_white_list(target_collection, &recipient)?;1429        }14301431        match target_collection.mode1432        {1433            CollectionMode::NFT => Self::transfer_nft(target_collection, item_id, sender.clone(), recipient.clone())?,1434            CollectionMode::Fungible(_)  => Self::transfer_fungible(target_collection, value, &sender, &recipient)?,1435            CollectionMode::ReFungible  => Self::transfer_refungible(target_collection, item_id, value, sender.clone(), recipient.clone())?,1436            _ => ()1437        };14381439        Self::deposit_event(RawEvent::Transfer(target_collection.id, item_id, sender, recipient, value));14401441        Ok(())1442    }14431444	pub fn approve_internal(1445		sender: T::AccountId,1446		spender: T::AccountId,1447		collection: &CollectionHandle<T>,1448		item_id: TokenId,1449		amount: u128,1450	) -> DispatchResult {1451		Self::token_exists(&collection, item_id)?;14521453		// Transfer permissions check1454		let bypasses_limits = collection.limits.owner_can_transfer &&1455			Self::is_owner_or_admin_permissions(1456				&collection,1457				sender.clone(),1458			);14591460		let allowance_limit = if bypasses_limits {1461			None1462		} else if let Some(amount) = Self::owned_amount(1463			sender.clone(),1464			&collection,1465			item_id,1466		) {1467			Some(amount)1468		} else {1469			fail!(Error::<T>::NoPermission);1470		};14711472		if collection.access == AccessMode::WhiteList {1473			Self::check_white_list(&collection, &sender)?;1474			Self::check_white_list(&collection, &spender)?;1475		}14761477		let allowance: u128 = amount1478			.checked_add(<Allowances<T>>::get(collection.id, (item_id, &sender, &spender)))1479			.ok_or(Error::<T>::NumOverflow)?;1480		if let Some(limit) = allowance_limit {1481			ensure!(limit >= allowance, Error::<T>::TokenValueTooLow);1482		}1483		<Allowances<T>>::insert(collection.id, (item_id, &sender, &spender), allowance);14841485		Self::deposit_event(RawEvent::Approved(collection.id, item_id, sender, spender, allowance));1486		Ok(())1487	}14881489	pub fn transfer_from_internal(1490		sender: T::AccountId,1491		from: T::AccountId,1492		recipient: T::AccountId,1493		collection: &CollectionHandle<T>,1494		item_id: TokenId,1495		amount: u128,1496	) -> DispatchResult {1497		// Check approval1498		let approval: u128 = <Allowances<T>>::get(collection.id, (item_id, &from, &sender));14991500		// Limits check1501		Self::is_correct_transfer(&collection, &recipient)?;15021503		// Transfer permissions check1504		ensure!(1505			approval >= amount || 1506			(1507				collection.limits.owner_can_transfer &&1508				Self::is_owner_or_admin_permissions(&collection, sender.clone())1509			),1510			Error::<T>::NoPermission1511		);15121513		if collection.access == AccessMode::WhiteList {1514			Self::check_white_list(&collection, &sender)?;1515			Self::check_white_list(&collection, &recipient)?;1516		}15171518		// Reduce approval by transferred amount or remove if remaining approval drops to 01519		let allowance = approval.saturating_sub(amount);1520		if allowance > 0 {1521			<Allowances<T>>::insert(collection.id, (item_id, &from, &sender), allowance);1522		} else {1523			<Allowances<T>>::remove(collection.id, (item_id, &from, &sender));1524		}15251526		match collection.mode {1527			CollectionMode::NFT => {1528				Self::transfer_nft(&collection, item_id, from.clone(), recipient.clone())?1529			}1530			CollectionMode::Fungible(_) => {1531				Self::transfer_fungible(&collection, amount, &from, &recipient)?1532			}1533			CollectionMode::ReFungible => {1534				Self::transfer_refungible(&collection, item_id, amount, from.clone(), recipient.clone())?1535			}1536			_ => ()1537		};15381539		Ok(())1540	}15411542    pub fn set_variable_meta_data_internal(1543        sender: T::AccountId,1544        collection: &CollectionHandle<T>, 1545        item_id: TokenId,1546        data: Vec<u8>,1547    ) -> DispatchResult {1548        Self::token_exists(&collection, item_id)?;15491550        ensure!(ChainLimit::get().custom_data_limit >= data.len() as u32, Error::<T>::TokenVariableDataLimitExceeded);15511552        // Modify permissions check1553        ensure!(Self::is_item_owner(sender.clone(), &collection, item_id) ||1554            Self::is_owner_or_admin_permissions(&collection, sender.clone()),1555            Error::<T>::NoPermission);15561557        match collection.mode1558        {1559            CollectionMode::NFT => Self::set_nft_variable_data(&collection, item_id, data)?,1560            CollectionMode::ReFungible  => Self::set_re_fungible_variable_data(&collection, item_id, data)?,1561            CollectionMode::Fungible(_) => fail!(Error::<T>::CantStoreMetadataInFungibleTokens),1562            _ => fail!(Error::<T>::UnexpectedCollectionType)1563        };15641565        Ok(())1566    }15671568    pub fn create_multiple_items_internal(1569        sender: T::AccountId,1570        collection: &CollectionHandle<T>,1571        owner: T::AccountId,1572        items_data: Vec<CreateItemData>,1573    ) -> DispatchResult {1574        Self::can_create_items_in_collection(&collection, &sender, &owner, items_data.len() as u32)?;15751576        for data in &items_data {1577            Self::validate_create_item_args(&collection, data)?;1578        }1579        for data in &items_data {1580            Self::create_item_no_validation(&collection, owner.clone(), data.clone())?;1581        }15821583        Ok(())1584    }15851586    pub fn toggle_white_list_internal(1587        sender: &T::AccountId,1588        collection: &CollectionHandle<T>,1589        address: &T::AccountId,1590        whitelisted: bool,1591    ) -> DispatchResult {1592        Self::check_owner_or_admin_permissions(&collection, sender.clone())?;15931594        if whitelisted {1595            <WhiteList<T>>::insert(collection.id, address, true);1596        } else {1597            <WhiteList<T>>::remove(collection.id, address);1598        }15991600        Ok(())1601    }16021603    fn is_correct_transfer(collection: &CollectionHandle<T>, recipient: &T::AccountId) -> DispatchResult {1604        let collection_id = collection.id;16051606        // check token limit and account token limit1607        let account_items: u32 = <AddressTokens<T>>::get(collection_id, recipient).len() as u32;1608        ensure!(collection.limits.account_token_ownership_limit > account_items,  Error::<T>::AccountTokenLimitExceeded);1609        1610        Ok(())1611    }16121613    fn can_create_items_in_collection(collection: &CollectionHandle<T>, sender: &T::AccountId, owner: &T::AccountId, amount: u32) -> DispatchResult {1614        let collection_id = collection.id;16151616        // check token limit and account token limit1617        let total_items: u32 = ItemListIndex::get(collection_id)1618            .checked_add(amount)1619            .ok_or(Error::<T>::CollectionTokenLimitExceeded)?;1620        let account_items: u32 = (<AddressTokens<T>>::get(collection_id, owner).len() as u32)1621            .checked_add(amount)1622            .ok_or(Error::<T>::AccountTokenLimitExceeded)?;1623        ensure!(collection.limits.token_limit >= total_items,  Error::<T>::CollectionTokenLimitExceeded);1624        ensure!(collection.limits.account_token_ownership_limit >= account_items,  Error::<T>::AccountTokenLimitExceeded);16251626        if !Self::is_owner_or_admin_permissions(collection, sender.clone()) {1627            ensure!(collection.mint_mode == true, Error::<T>::PublicMintingNotAllowed);1628            Self::check_white_list(collection, owner)?;1629            Self::check_white_list(collection, sender)?;1630        }16311632        Ok(())1633    }16341635    fn validate_create_item_args(target_collection: &CollectionHandle<T>, data: &CreateItemData) -> DispatchResult {1636        match target_collection.mode1637        {1638            CollectionMode::NFT => {1639                if let CreateItemData::NFT(data) = data {1640                    // check sizes1641                    ensure!(ChainLimit::get().custom_data_limit >= data.const_data.len() as u32, Error::<T>::TokenConstDataLimitExceeded);1642                    ensure!(ChainLimit::get().custom_data_limit >= data.variable_data.len() as u32, Error::<T>::TokenVariableDataLimitExceeded);1643                } else {1644                    fail!(Error::<T>::NotNftDataUsedToMintNftCollectionToken);1645                }1646            },1647            CollectionMode::Fungible(_) => {1648                if let CreateItemData::Fungible(_) = data {1649                } else {1650                    fail!(Error::<T>::NotFungibleDataUsedToMintFungibleCollectionToken);1651                }1652            },1653            CollectionMode::ReFungible => {1654                if let CreateItemData::ReFungible(data) = data {16551656                    // check sizes1657                    ensure!(ChainLimit::get().custom_data_limit >= data.const_data.len() as u32, Error::<T>::TokenConstDataLimitExceeded);1658                    ensure!(ChainLimit::get().custom_data_limit >= data.variable_data.len() as u32, Error::<T>::TokenVariableDataLimitExceeded);16591660                    // Check refungibility limits1661                    ensure!(data.pieces <= MAX_REFUNGIBLE_PIECES, Error::<T>::WrongRefungiblePieces);1662                    ensure!(data.pieces > 0, Error::<T>::WrongRefungiblePieces);1663                } else {1664                    fail!(Error::<T>::NotReFungibleDataUsedToMintReFungibleCollectionToken);1665                }1666            },1667            _ => { fail!(Error::<T>::UnexpectedCollectionType); }1668        };16691670        Ok(())1671    }16721673    fn create_item_no_validation(collection: &CollectionHandle<T>, owner: T::AccountId, data: CreateItemData) -> DispatchResult {1674        match data1675        {1676            CreateItemData::NFT(data) => {1677                let item = NftItemType {1678                    owner: owner.clone(),1679                    const_data: data.const_data,1680                    variable_data: data.variable_data1681                };16821683                Self::add_nft_item(collection, item)?;1684            },1685            CreateItemData::Fungible(data) => {1686                Self::add_fungible_item(collection, &owner, data.value)?;1687            },1688            CreateItemData::ReFungible(data) => {1689                let mut owner_list = Vec::new();1690                owner_list.push(Ownership {owner: owner.clone(), fraction: data.pieces});16911692                let item = ReFungibleItemType {1693                    owner: owner_list,1694                    const_data: data.const_data,1695                    variable_data: data.variable_data1696                };16971698                Self::add_refungible_item(collection, item)?;1699            }1700        };17011702        Ok(())1703    }17041705    fn add_fungible_item(collection: &CollectionHandle<T>, owner: &T::AccountId, value: u128) -> DispatchResult {1706        let collection_id = collection.id;17071708        // Does new owner already have an account?1709        let balance: u128 = <FungibleItemList<T>>::get(collection_id, owner).value;17101711        // Mint 1712        let item = FungibleItemType {1713            value: balance.checked_add(value).ok_or(Error::<T>::NumOverflow)?,1714        };1715        <FungibleItemList<T>>::insert(collection_id, (*owner).clone(), item);17161717        // Update balance1718        let new_balance = <Balance<T>>::get(collection_id, owner)1719            .checked_add(value)1720            .ok_or(Error::<T>::NumOverflow)?;1721        <Balance<T>>::insert(collection_id, (*owner).clone(), new_balance);17221723        Self::deposit_event(RawEvent::ItemCreated(collection_id, 0, owner.clone()));1724        Ok(())1725    }17261727    fn add_refungible_item(collection: &CollectionHandle<T>, item: ReFungibleItemType<T::AccountId>) -> DispatchResult {1728        let collection_id = collection.id;17291730        let current_index = <ItemListIndex>::get(collection_id)1731            .checked_add(1)1732            .ok_or(Error::<T>::NumOverflow)?;1733        let itemcopy = item.clone();17341735        ensure!(1736            item.owner.len() == 1,1737            Error::<T>::BadCreateRefungibleCall,1738        );1739        let item_owner = item.owner.first().expect("only one owner is defined");17401741        let value = item_owner.fraction;1742        let owner = item_owner.owner.clone();17431744        Self::add_token_index(collection_id, current_index, &owner)?;17451746        <ItemListIndex>::insert(collection_id, current_index);1747        <ReFungibleItemList<T>>::insert(collection_id, current_index, itemcopy);17481749        // Update balance1750        let new_balance = <Balance<T>>::get(collection_id, &owner)1751            .checked_add(value)1752            .ok_or(Error::<T>::NumOverflow)?;1753        <Balance<T>>::insert(collection_id, owner.clone(), new_balance);17541755        Self::deposit_event(RawEvent::ItemCreated(collection_id, current_index, owner));1756        Ok(())1757    }17581759    fn add_nft_item(collection: &CollectionHandle<T>, item: NftItemType<T::AccountId>) -> DispatchResult {1760        let collection_id = collection.id;17611762        let current_index = <ItemListIndex>::get(collection_id)1763            .checked_add(1)1764            .ok_or(Error::<T>::NumOverflow)?;17651766        let item_owner = item.owner.clone();1767        Self::add_token_index(collection_id, current_index, &item.owner)?;17681769        <ItemListIndex>::insert(collection_id, current_index);1770        <NftItemList<T>>::insert(collection_id, current_index, item);17711772        // Update balance1773        let new_balance = <Balance<T>>::get(collection_id, item_owner.clone())1774            .checked_add(1)1775            .ok_or(Error::<T>::NumOverflow)?;1776        <Balance<T>>::insert(collection_id, item_owner.clone(), new_balance);17771778        Self::deposit_event(RawEvent::ItemCreated(collection_id, current_index, item_owner));1779        Ok(())1780    }17811782    fn burn_refungible_item(1783        collection: &CollectionHandle<T>,1784        item_id: TokenId,1785        owner: &T::AccountId,1786    ) -> DispatchResult {1787        let collection_id = collection.id;17881789        let mut token = <ReFungibleItemList<T>>::get(collection_id, item_id)1790            .ok_or(Error::<T>::TokenNotFound)?;1791        let rft_balance = token1792            .owner1793            .iter()1794            .find(|&i| i.owner == *owner)1795            .ok_or(Error::<T>::TokenNotFound)?;1796        Self::remove_token_index(collection_id, item_id, owner)?;17971798        // update balance1799        let new_balance = <Balance<T>>::get(collection_id, rft_balance.owner.clone())1800            .checked_sub(rft_balance.fraction)1801            .ok_or(Error::<T>::NumOverflow)?;1802        <Balance<T>>::insert(collection_id, rft_balance.owner.clone(), new_balance);18031804        // Re-create owners list with sender removed1805        let index = token1806            .owner1807            .iter()1808            .position(|i| i.owner == *owner)1809            .expect("owned item is exists");1810        token.owner.remove(index);1811        let owner_count = token.owner.len();18121813        // Burn the token completely if this was the last (only) owner1814        if owner_count == 0 {1815            <ReFungibleItemList<T>>::remove(collection_id, item_id);1816            <VariableMetaDataBasket<T>>::remove(collection_id, item_id);1817        }1818        else {1819            <ReFungibleItemList<T>>::insert(collection_id, item_id, token);1820        }18211822        Ok(())1823    }18241825    fn burn_nft_item(collection: &CollectionHandle<T>, item_id: TokenId) -> DispatchResult {1826        let collection_id = collection.id;18271828        let item = <NftItemList<T>>::get(collection_id, item_id)1829            .ok_or(Error::<T>::TokenNotFound)?;1830        Self::remove_token_index(collection_id, item_id, &item.owner)?;18311832        // update balance1833        let new_balance = <Balance<T>>::get(collection_id, &item.owner)1834            .checked_sub(1)1835            .ok_or(Error::<T>::NumOverflow)?;1836        <Balance<T>>::insert(collection_id, item.owner.clone(), new_balance);1837        <NftItemList<T>>::remove(collection_id, item_id);1838        <VariableMetaDataBasket<T>>::remove(collection_id, item_id);18391840        Ok(())1841    }18421843    fn burn_fungible_item(owner: &T::AccountId, collection: &CollectionHandle<T>, value: u128) -> DispatchResult {1844        let collection_id = collection.id;18451846        let mut balance = <FungibleItemList<T>>::get(collection_id, owner);1847        ensure!(balance.value >= value, Error::<T>::TokenValueNotEnough);18481849        // update balance1850        let new_balance = <Balance<T>>::get(collection_id, owner)1851            .checked_sub(value)1852            .ok_or(Error::<T>::NumOverflow)?;1853        <Balance<T>>::insert(collection_id, (*owner).clone(), new_balance);18541855        if balance.value - value > 0 {1856            balance.value -= value;1857            <FungibleItemList<T>>::insert(collection_id, (*owner).clone(), balance);1858        }1859        else {1860            <FungibleItemList<T>>::remove(collection_id, owner);1861        }18621863        Ok(())1864    }18651866    pub fn get_collection(collection_id: CollectionId) -> Result<CollectionHandle<T>, sp_runtime::DispatchError> {1867        Ok(<CollectionById<T>>::get(collection_id)1868            .map(|collection| CollectionHandle {1869                id: collection_id,1870                collection1871            })1872            .ok_or(Error::<T>::CollectionNotFound)?)1873    }18741875    fn save_collection(collection: CollectionHandle<T>) {1876        <CollectionById<T>>::insert(collection.id, collection.collection);1877    }18781879    fn check_owner_permissions(target_collection: &CollectionHandle<T>, subject: T::AccountId) -> DispatchResult {1880        ensure!(1881            subject == target_collection.owner,1882            Error::<T>::NoPermission1883        );18841885        Ok(())1886    }18871888    fn is_owner_or_admin_permissions(collection: &CollectionHandle<T>, subject: T::AccountId) -> bool {1889        subject == collection.owner || <AdminList<T>>::get(collection.id).contains(&subject)1890    }18911892    fn check_owner_or_admin_permissions(1893        collection: &CollectionHandle<T>,1894        subject: T::AccountId,1895    ) -> DispatchResult {1896        ensure!(Self::is_owner_or_admin_permissions(collection, subject), Error::<T>::NoPermission);18971898        Ok(())1899    }19001901    fn owned_amount(1902        subject: T::AccountId,1903        target_collection: &CollectionHandle<T>,1904        item_id: TokenId,1905    ) -> Option<u128> {1906        let collection_id = target_collection.id;19071908        match target_collection.mode {1909            CollectionMode::NFT => (<NftItemList<T>>::get(collection_id, item_id)?.owner == subject)1910                .then(|| 1),1911            CollectionMode::Fungible(_) => Some(<FungibleItemList<T>>::get(collection_id, &subject)1912                .value),1913            CollectionMode::ReFungible => <ReFungibleItemList<T>>::get(collection_id, item_id)?1914                .owner1915                .iter()1916                .find(|i| i.owner == subject)1917                .map(|i| i.fraction),1918            CollectionMode::Invalid => None,1919        }1920    }19211922    fn is_item_owner(subject: T::AccountId, target_collection: &CollectionHandle<T>, item_id: TokenId) -> bool {1923        match target_collection.mode {1924            CollectionMode::Fungible(_) => true,1925            _ => Self::owned_amount(subject, target_collection, item_id).is_some(),1926        }1927    }19281929    fn check_white_list(collection: &CollectionHandle<T>, address: &T::AccountId) -> DispatchResult {1930        let collection_id = collection.id;19311932        let mes = Error::<T>::AddresNotInWhiteList;1933        ensure!(<WhiteList<T>>::contains_key(collection_id, address), mes);19341935        Ok(())1936    }19371938    /// Check if token exists. In case of Fungible, check if there is an entry for 1939    /// the owner in fungible balances double map1940    fn token_exists(1941        target_collection: &CollectionHandle<T>,1942        item_id: TokenId,1943    ) -> DispatchResult {1944        let collection_id = target_collection.id;1945        let exists = match target_collection.mode1946        {1947            CollectionMode::NFT => <NftItemList<T>>::contains_key(collection_id, item_id),1948            CollectionMode::Fungible(_)  => true,1949            CollectionMode::ReFungible  => <ReFungibleItemList<T>>::contains_key(collection_id, item_id),1950            _ => false1951        };19521953        ensure!(exists == true, Error::<T>::TokenNotFound);1954        Ok(())1955    }19561957    fn transfer_fungible(1958        collection: &CollectionHandle<T>,1959        value: u128,1960        owner: &T::AccountId,1961        recipient: &T::AccountId,1962    ) -> DispatchResult {1963        let collection_id = collection.id;19641965        let mut balance = <FungibleItemList<T>>::get(collection_id, owner);1966        ensure!(balance.value >= value, Error::<T>::TokenValueTooLow);19671968        // Send balance to recipient (updates balanceOf of recipient)1969        Self::add_fungible_item(collection, recipient, value)?;19701971        // update balanceOf of sender1972        <Balance<T>>::insert(collection_id, (*owner).clone(), balance.value - value);19731974        // Reduce or remove sender1975        if balance.value == value {1976            <FungibleItemList<T>>::remove(collection_id, owner);1977        }1978        else {1979            balance.value -= value;1980            <FungibleItemList<T>>::insert(collection_id, (*owner).clone(), balance);1981        }19821983        Ok(())1984    }19851986    fn transfer_refungible(1987        collection: &CollectionHandle<T>,1988        item_id: TokenId,1989        value: u128,1990        owner: T::AccountId,1991        new_owner: T::AccountId,1992    ) -> DispatchResult {1993        let collection_id = collection.id;1994        let full_item = <ReFungibleItemList<T>>::get(collection_id, item_id)1995            .ok_or(Error::<T>::TokenNotFound)?;19961997        let item = full_item1998            .owner1999            .iter()2000            .filter(|i| i.owner == owner)2001            .next()2002            .ok_or(Error::<T>::TokenNotFound)?;2003        let amount = item.fraction;20042005        ensure!(amount >= value, Error::<T>::TokenValueTooLow);20062007        // update balance2008        let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.clone())2009            .checked_sub(value)2010            .ok_or(Error::<T>::NumOverflow)?;2011        <Balance<T>>::insert(collection_id, item.owner.clone(), balance_old_owner);20122013        let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.clone())2014            .checked_add(value)2015            .ok_or(Error::<T>::NumOverflow)?;2016        <Balance<T>>::insert(collection_id, new_owner.clone(), balance_new_owner);20172018        let old_owner = item.owner.clone();2019        let new_owner_has_account = full_item.owner.iter().any(|i| i.owner == new_owner);20202021        // transfer2022        if amount == value && !new_owner_has_account {2023            // change owner2024            // new owner do not have account2025            let mut new_full_item = full_item.clone();2026            new_full_item2027                .owner2028                .iter_mut()2029                .find(|i| i.owner == owner)2030                .expect("old owner does present in refungible")2031                .owner = new_owner.clone();2032            <ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);20332034            // update index collection2035            Self::move_token_index(collection_id, item_id, &old_owner, &new_owner)?;2036        } else {2037            let mut new_full_item = full_item.clone();2038            new_full_item2039                .owner2040                .iter_mut()2041                .find(|i| i.owner == owner)2042                .expect("old owner does present in refungible")2043                .fraction -= value;20442045            // separate amount2046            if new_owner_has_account {2047                // new owner has account2048                new_full_item2049                    .owner2050                    .iter_mut()2051                    .find(|i| i.owner == new_owner)2052                    .expect("new owner has account")2053                    .fraction += value;2054            } else {2055                // new owner do not have account2056                new_full_item.owner.push(Ownership {2057                    owner: new_owner.clone(),2058                    fraction: value,2059                });2060                Self::add_token_index(collection_id, item_id, &new_owner)?;2061            }20622063            <ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);2064        }20652066        Ok(())2067    }20682069    fn transfer_nft(2070        collection: &CollectionHandle<T>,2071        item_id: TokenId,2072        sender: T::AccountId,2073        new_owner: T::AccountId,2074    ) -> DispatchResult {2075        let collection_id = collection.id;2076        let mut item = <NftItemList<T>>::get(collection_id, item_id)2077            .ok_or(Error::<T>::TokenNotFound)?;20782079        ensure!(2080            sender == item.owner,2081            Error::<T>::MustBeTokenOwner2082        );20832084        // update balance2085        let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.clone())2086            .checked_sub(1)2087            .ok_or(Error::<T>::NumOverflow)?;2088        <Balance<T>>::insert(collection_id, item.owner.clone(), balance_old_owner);20892090        let balancenew_owner = <Balance<T>>::get(collection_id, new_owner.clone())2091            .checked_add(1)2092            .ok_or(Error::<T>::NumOverflow)?;2093        <Balance<T>>::insert(collection_id, new_owner.clone(), balancenew_owner);20942095        // change owner2096        let old_owner = item.owner.clone();2097        item.owner = new_owner.clone();2098        <NftItemList<T>>::insert(collection_id, item_id, item);20992100        // update index collection2101        Self::move_token_index(collection_id, item_id, &old_owner, &new_owner)?;21022103        Ok(())2104    }2105    2106    fn set_re_fungible_variable_data(2107        collection: &CollectionHandle<T>,2108        item_id: TokenId,2109        data: Vec<u8>2110    ) -> DispatchResult {2111        let collection_id = collection.id;2112        let mut item = <ReFungibleItemList<T>>::get(collection_id, item_id)2113            .ok_or(Error::<T>::TokenNotFound)?;21142115        item.variable_data = data;21162117        <ReFungibleItemList<T>>::insert(collection_id, item_id, item);21182119        Ok(())2120    }21212122    fn set_nft_variable_data(2123        collection: &CollectionHandle<T>,2124        item_id: TokenId,2125        data: Vec<u8>2126    ) -> DispatchResult {2127        let collection_id = collection.id;2128        let mut item = <NftItemList<T>>::get(collection_id, item_id)2129            .ok_or(Error::<T>::TokenNotFound)?;2130        2131        item.variable_data = data;21322133        <NftItemList<T>>::insert(collection_id, item_id, item);2134        2135        Ok(())2136    }21372138    #[allow(dead_code)]2139    fn init_collection(item: &Collection<T>) {2140        // check params2141        assert!(2142            item.decimal_points <= MAX_DECIMAL_POINTS,2143            "decimal_points parameter must be lower than MAX_DECIMAL_POINTS"2144        );2145        assert!(2146            item.name.len() <= 64,2147            "Collection name can not be longer than 63 char"2148        );2149        assert!(2150            item.name.len() <= 256,2151            "Collection description can not be longer than 255 char"2152        );2153        assert!(2154            item.token_prefix.len() <= 16,2155            "Token prefix can not be longer than 15 char"2156        );21572158        // Generate next collection ID2159        let next_id = CreatedCollectionCount::get()2160            .checked_add(1)2161            .unwrap();21622163        CreatedCollectionCount::put(next_id);2164    }21652166    #[allow(dead_code)]2167    fn init_nft_token(collection_id: CollectionId, item: &NftItemType<T::AccountId>) {2168        let current_index = <ItemListIndex>::get(collection_id)2169            .checked_add(1)2170            .unwrap();21712172        let item_owner = item.owner.clone();2173        Self::add_token_index(collection_id, current_index, &item.owner).unwrap();21742175        <ItemListIndex>::insert(collection_id, current_index);21762177        // Update balance2178        let new_balance = <Balance<T>>::get(collection_id, &item_owner)2179            .checked_add(1)2180            .unwrap();2181        <Balance<T>>::insert(collection_id, item_owner.clone(), new_balance);2182    }21832184    #[allow(dead_code)]2185    fn init_fungible_token(collection_id: CollectionId, owner: &T::AccountId, item: &FungibleItemType) {2186        let current_index = <ItemListIndex>::get(collection_id)2187            .checked_add(1)2188            .unwrap();21892190        Self::add_token_index(collection_id, current_index, owner).unwrap();21912192        <ItemListIndex>::insert(collection_id, current_index);21932194        // Update balance2195        let new_balance = <Balance<T>>::get(collection_id, owner)2196            .checked_add(item.value)2197            .unwrap();2198        <Balance<T>>::insert(collection_id, (*owner).clone(), new_balance);2199    }22002201    #[allow(dead_code)]2202    fn init_refungible_token(collection_id: CollectionId, item: &ReFungibleItemType<T::AccountId>) {2203        let current_index = <ItemListIndex>::get(collection_id)2204            .checked_add(1)2205            .unwrap();22062207        let value = item.owner.first().unwrap().fraction;2208        let owner = item.owner.first().unwrap().owner.clone();22092210        Self::add_token_index(collection_id, current_index, &owner).unwrap();22112212        <ItemListIndex>::insert(collection_id, current_index);22132214        // Update balance2215        let new_balance = <Balance<T>>::get(collection_id, &owner)2216            .checked_add(value)2217            .unwrap();2218        <Balance<T>>::insert(collection_id, owner.clone(), new_balance);2219    }22202221    fn add_token_index(collection_id: CollectionId, item_index: TokenId, owner: &T::AccountId) -> DispatchResult {2222        // add to account limit2223        if <AccountItemCount<T>>::contains_key(owner) {22242225            // bound Owned tokens by a single address2226            let count = <AccountItemCount<T>>::get(owner);2227            ensure!(count < ChainLimit::get().account_token_ownership_limit, Error::<T>::AddressOwnershipLimitExceeded);22282229            <AccountItemCount<T>>::insert(owner.clone(), count2230                .checked_add(1)2231                .ok_or(Error::<T>::NumOverflow)?);2232        }2233        else {2234            <AccountItemCount<T>>::insert(owner.clone(), 1);2235        }22362237        let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner);2238        if list_exists {2239            let mut list = <AddressTokens<T>>::get(collection_id, owner);2240            let item_contains = list.contains(&item_index.clone());22412242            if !item_contains {2243                list.push(item_index.clone());2244            }22452246            <AddressTokens<T>>::insert(collection_id, owner.clone(), list);2247        } else {2248            let mut itm = Vec::new();2249            itm.push(item_index.clone());2250            <AddressTokens<T>>::insert(collection_id, owner.clone(), itm);2251        }22522253        Ok(())2254    }22552256    fn remove_token_index(2257        collection_id: CollectionId,2258        item_index: TokenId,2259        owner: &T::AccountId,2260    ) -> DispatchResult {22612262        // update counter2263        <AccountItemCount<T>>::insert(owner.clone(), 2264            <AccountItemCount<T>>::get(owner)2265            .checked_sub(1)2266            .ok_or(Error::<T>::NumOverflow)?);226722682269        let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner);2270        if list_exists {2271            let mut list = <AddressTokens<T>>::get(collection_id, owner);2272            let item_contains = list.contains(&item_index.clone());22732274            if item_contains {2275                list.retain(|&item| item != item_index);2276                <AddressTokens<T>>::insert(collection_id, owner.clone(), list);2277            }2278        }22792280        Ok(())2281    }22822283    fn move_token_index(2284        collection_id: CollectionId,2285        item_index: TokenId,2286        old_owner: &T::AccountId,2287        new_owner: &T::AccountId,2288    ) -> DispatchResult {2289        Self::remove_token_index(collection_id, item_index, old_owner)?;2290        Self::add_token_index(collection_id, item_index, new_owner)?;22912292        Ok(())2293    }2294    2295    fn ensure_contract_owned(account: T::AccountId, contract: &T::AccountId) -> DispatchResult {2296        ensure!(<ContractOwner<T>>::get(contract) == Some(account), Error::<T>::NoPermission);22972298        Ok(())2299    }2300}