git.delta.rocks / unique-network / refs/commits / cd2930267fbc

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, WithdrawReason,24    },25    weights::{26        constants::{BlockExecutionWeight, ExtrinsicBaseWeight, RocksDbWeight, WEIGHT_PER_SECOND},27        DispatchInfo, GetDispatchInfo, IdentityFee, Pays, PostDispatchInfo, Weight,28        WeightToFeePolynomial,29    },30    IsSubType, StorageValue,31};3233use frame_system::{self as system, ensure_signed, ensure_root};34use sp_runtime::sp_std::prelude::Vec;35use sp_runtime::{36    traits::{37        DispatchInfoOf, Dispatchable, PostDispatchInfoOf, Saturating, SaturatedConversion, SignedExtension, Zero,38    },39    transaction_validity::{40        TransactionPriority, InvalidTransaction, TransactionValidity, TransactionValidityError, ValidTransaction,41    },42    FixedPointOperand, FixedU128,43};44use pallet_contracts::ContractAddressFor;45use sp_runtime::traits::StaticLookup;4647#[cfg(test)]48mod mock;4950#[cfg(test)]51mod tests;5253mod default_weights;5455pub const MAX_DECIMAL_POINTS: DecimalPoints = 30;56pub const MAX_SPONSOR_TIMEOUT: u32 = 10_368_000;57pub const MAX_TOKEN_OWNERSHIP: u32 = 10_000_000;5859// Structs60// #region6162pub type CollectionId = u32;63pub type TokenId = u32;64pub type DecimalPoints = u8;6566#[derive(Encode, Decode, Eq, Debug, Clone, PartialEq)]67#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]68pub enum CollectionMode {69    Invalid,70    NFT,71    // decimal points72    Fungible(DecimalPoints),73    // decimal points74    ReFungible(DecimalPoints),75}7677impl Into<u8> for CollectionMode {78    fn into(self) -> u8 {79        match self {80            CollectionMode::Invalid => 0,81            CollectionMode::NFT => 1,82            CollectionMode::Fungible(_) => 2,83            CollectionMode::ReFungible(_) => 3,84        }85    }86}8788#[derive(Encode, Decode, Eq, Debug, Clone, PartialEq)]89#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]90pub enum AccessMode {91    Normal,92    WhiteList,93}94impl Default for AccessMode {95    fn default() -> Self {96        Self::Normal97    }98}99100impl Default for CollectionMode {101    fn default() -> Self {102        Self::Invalid103    }104}105106#[derive(Encode, Decode, Eq, Debug, Clone, PartialEq)]107#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]108pub enum SchemaVersion {109    ImageURL,110    Unique,111}112impl Default for SchemaVersion {113    fn default() -> Self {114        Self::ImageURL115    }116}117118#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]119#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]120pub struct Ownership<AccountId> {121    pub owner: AccountId,122    pub fraction: u128,123}124125#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]126#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]127pub struct CollectionType<AccountId> {128    pub owner: AccountId,129    pub mode: CollectionMode,130    pub access: AccessMode,131    pub decimal_points: DecimalPoints,132    pub name: Vec<u16>,        // 64 include null escape char133    pub description: Vec<u16>, // 256 include null escape char134    pub token_prefix: Vec<u8>, // 16 include null escape char135    pub mint_mode: bool,136    pub offchain_schema: Vec<u8>,137    pub schema_version: SchemaVersion,138    pub sponsor: AccountId, // Who pays fees. If set to default address, the fees are applied to the transaction sender139    pub unconfirmed_sponsor: AccountId, // Sponsor address that has not yet confirmed sponsorship140    pub limits: CollectionLimits, // Collection private restrictions 141    pub variable_on_chain_schema: Vec<u8>, //142    pub const_on_chain_schema: Vec<u8>, //143}144145#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]146#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]147pub struct NftItemType<AccountId> {148    pub collection: CollectionId,149    pub owner: AccountId,150    pub const_data: Vec<u8>,151    pub variable_data: Vec<u8>,152}153154#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]155#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]156pub struct FungibleItemType<AccountId> {157    pub collection: CollectionId,158    pub owner: AccountId,159    pub value: u128,160}161162#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]163#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]164pub struct ReFungibleItemType<AccountId> {165    pub collection: CollectionId,166    pub owner: Vec<Ownership<AccountId>>,167    pub const_data: Vec<u8>,168    pub variable_data: Vec<u8>,169}170171#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]172#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]173pub struct ApprovePermissions<AccountId> {174    pub approved: AccountId,175    pub amount: u128,176}177178#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]179#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]180pub struct VestingItem<AccountId, Moment> {181    pub sender: AccountId,182    pub recipient: AccountId,183    pub collection_id: CollectionId,184    pub item_id: TokenId,185    pub amount: u64,186    pub vesting_date: Moment,187}188189#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]190#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]191pub struct BasketItem<AccountId, BlockNumber> {192    pub address: AccountId,193    pub start_block: BlockNumber,194}195196#[derive(Encode, Decode, Debug, Clone, PartialEq)]197#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]198pub struct CollectionLimits {199    pub account_token_ownership_limit: u32,200    pub sponsored_data_size: u32,201    pub token_limit: u32,202203    // Timeouts for item types in passed blocks204    pub sponsor_transfer_timeout: u32,205}206207impl Default for CollectionLimits {208    fn default() -> CollectionLimits {209        CollectionLimits { 210            account_token_ownership_limit: 10_000_000, 211            token_limit: u32::max_value(),212            sponsored_data_size: u32::max_value(), 213            sponsor_transfer_timeout: 14400 }214    }215}216217#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]218#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]219pub struct ChainLimits {220    pub collection_numbers_limit: u32,221    pub account_token_ownership_limit: u32,222    pub collections_admins_limit: u64,223    pub custom_data_limit: u32,224225    // Timeouts for item types in passed blocks226    pub nft_sponsor_transfer_timeout: u32,227    pub fungible_sponsor_transfer_timeout: u32,228    pub refungible_sponsor_transfer_timeout: u32,229}230231pub trait WeightInfo {232	fn create_collection() -> Weight;233	fn destroy_collection() -> Weight;234	fn add_to_white_list() -> Weight;235	fn remove_from_white_list() -> Weight;236    fn set_public_access_mode() -> Weight;237    fn set_mint_permission() -> Weight;238    fn change_collection_owner() -> Weight;239    fn add_collection_admin() -> Weight;240    fn remove_collection_admin() -> Weight;241    fn set_collection_sponsor() -> Weight;242    fn confirm_sponsorship() -> Weight;243    fn remove_collection_sponsor() -> Weight;244    fn create_item(s: usize) -> Weight;245    fn burn_item() -> Weight;246    fn transfer() -> Weight;247    fn approve() -> Weight;248    fn transfer_from() -> Weight;249    fn set_offchain_schema() -> Weight;250    fn set_const_on_chain_schema() -> Weight;251    fn set_variable_on_chain_schema() -> Weight;252    fn set_variable_meta_data() -> Weight;253    fn enable_contract_sponsoring() -> Weight;254}255256#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]257#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]258pub struct CreateNftData {259    pub const_data: Vec<u8>,260    pub variable_data: Vec<u8>,261}262263#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]264#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]265pub struct CreateFungibleData {266}267268#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]269#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]270pub struct CreateReFungibleData {271    pub const_data: Vec<u8>,272    pub variable_data: Vec<u8>,273}274275#[derive(Encode, Decode, Debug, Clone, PartialEq)]276#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]277pub enum CreateItemData {278    NFT(CreateNftData),279    Fungible(CreateFungibleData),280    ReFungible(CreateReFungibleData),281}282283impl CreateItemData {284    pub fn len(&self) -> usize {285        let len = match self {286            CreateItemData::NFT(data) => data.variable_data.len() + data.const_data.len(),287            CreateItemData::ReFungible(data) => data.variable_data.len() + data.const_data.len(),288            _ => 0289        };290        291        return len;292    }293}294295impl From<CreateNftData> for CreateItemData {296    fn from(item: CreateNftData) -> Self {297        CreateItemData::NFT(item)298    }299}300301impl From<CreateReFungibleData> for CreateItemData {302    fn from(item: CreateReFungibleData) -> Self {303        CreateItemData::ReFungible(item)304    }305}306307impl From<CreateFungibleData> for CreateItemData {308    fn from(item: CreateFungibleData) -> Self {309        CreateItemData::Fungible(item)310    }311}312313314decl_error! {315	/// Error for non-fungible-token module.316	pub enum Error for Module<T: Trait> {317        /// Total collections bound exceeded.318        TotalCollectionsLimitExceeded,319		/// Decimal_points parameter must be lower than MAX_DECIMAL_POINTS constant, currently it is 30.320        CollectionDecimalPointLimitExceeded, 321        /// Collection name can not be longer than 63 char.322        CollectionNameLimitExceeded, 323        /// Collection description can not be longer than 255 char.324        CollectionDescriptionLimitExceeded, 325        /// Token prefix can not be longer than 15 char.326        CollectionTokenPrefixLimitExceeded,327        /// This collection does not exist.328        CollectionNotFound,329        /// Item not exists.330        TokenNotFound,331        /// Arithmetic calculation overflow.332        NumOverflow,       333        /// Account already has admin role.334        AlreadyAdmin,  335        /// You do not own this collection.336        NoPermission,337        /// This address is not set as sponsor, use setCollectionSponsor first.338        ConfirmUnsetSponsorFail,339        /// Collection is not in mint mode.340        PublicMintingNotAllowed,341        /// Sender parameter and item owner must be equal.342        MustBeTokenOwner,343        /// Item balance not enough.344        TokenValueTooLow,345        /// Size of item is too large.346        NftSizeLimitExceeded,347        /// No approve found348        ApproveNotFound,349        /// Requested value more than approved.350        TokenValueNotEnough,351        /// Only approved addresses can call this method.352        ApproveRequired,353        /// Address is not in white list.354        AddresNotInWhiteList,355        /// Number of collection admins bound exceeded.356        CollectionAdminsLimitExceeded,357        /// Owned tokens by a single address bound exceeded.358        AddressOwnershipLimitExceeded,359        /// Length of items properties must be greater than 0.360        EmptyArgument,361        /// const_data exceeded data limit.362        TokenConstDataLimitExceeded,363        /// variable_data exceeded data limit.364        TokenVariableDataLimitExceeded,365        /// Not NFT item data used to mint in NFT collection.366        NotNftDataUsedToMintNftCollectionToken,367        /// Not Fungible item data used to mint in Fungible collection.368        NotFungibleDataUsedToMintFungibleCollectionToken,369        /// Not Re Fungible item data used to mint in Re Fungible collection.370        NotReFungibleDataUsedToMintReFungibleCollectionToken,371        /// Unexpected collection type.372        UnexpectedCollectionType,373        /// Can't store metadata in fungible tokens.374        CantStoreMetadataInFungibleTokens,375        /// Collection token limit exceeded376        CollectionTokenLimitExceeded,377        /// Account token limit exceeded per collection378        AccountTokenLimitExceeded,379        /// Collection limit bounds per collection exceeded380        CollectionLimitBoundsExceeded381	}382}383384pub trait Trait: system::Trait + Sized + transaction_payment::Trait + pallet_contracts::Trait {385    type Event: From<Event<Self>> + Into<<Self as system::Trait>::Event>;386387    /// Weight information for extrinsics in this pallet.388	type WeightInfo: WeightInfo;389}390391#[cfg(feature = "runtime-benchmarks")]392mod benchmarking;393394// #endregion395396decl_storage! {397    trait Store for Module<T: Trait> as Nft {398399        // Private members400        NextCollectionID: CollectionId;401        CreatedCollectionCount: u32;402        ChainVersion: u64;403        ItemListIndex: map hasher(identity) CollectionId => TokenId;404405        // Chain limits struct406        pub ChainLimit get(fn chain_limit) config(): ChainLimits;407408        // Bound counters409        CollectionCount: u32;410        pub AccountItemCount get(fn account_item_count): map hasher(twox_64_concat) T::AccountId => u32;411412        // Basic collections413        pub Collection get(fn collection) config(): map hasher(identity) CollectionId => CollectionType<T::AccountId>;414        pub AdminList get(fn admin_list_collection): map hasher(identity) CollectionId => Vec<T::AccountId>;415        pub WhiteList get(fn white_list): double_map hasher(identity) CollectionId, hasher(twox_64_concat) T::AccountId => bool;416417        /// Balance owner per collection map418        pub Balance get(fn balance_count): double_map hasher(identity) CollectionId, hasher(twox_64_concat) T::AccountId => u128;419420        /// second parameter: item id + owner account id421        pub ApprovedList get(fn approved): double_map hasher(identity) CollectionId, hasher(twox_64_concat) (TokenId, T::AccountId) => Vec<ApprovePermissions<T::AccountId>>;422423        /// Item collections424        pub NftItemList get(fn nft_item_id) config(): double_map hasher(identity) CollectionId, hasher(identity) TokenId => NftItemType<T::AccountId>;425        pub FungibleItemList get(fn fungible_item_id) config(): double_map hasher(identity) CollectionId, hasher(identity) TokenId => FungibleItemType<T::AccountId>;426        pub ReFungibleItemList get(fn refungible_item_id) config(): double_map hasher(identity) CollectionId, hasher(identity) TokenId => ReFungibleItemType<T::AccountId>;427428        /// Index list429        pub AddressTokens get(fn address_tokens): double_map hasher(identity) CollectionId, hasher(twox_64_concat) T::AccountId => Vec<TokenId>;430431        /// Tokens transfer baskets432        pub NftTransferBasket get(fn nft_transfer_basket): double_map hasher(identity) CollectionId, hasher(identity) TokenId => T::BlockNumber;433        pub FungibleTransferBasket get(fn fungible_transfer_basket): double_map hasher(identity) CollectionId, hasher(identity) TokenId => Vec<BasketItem<T::AccountId, T::BlockNumber>>;434        pub ReFungibleTransferBasket get(fn refungible_transfer_basket): double_map hasher(identity) CollectionId, hasher(identity) TokenId => T::BlockNumber;435436        // Contract Sponsorship and Ownership437        pub ContractOwner get(fn contract_owner): map hasher(twox_64_concat) T::AccountId => T::AccountId;438        pub ContractSelfSponsoring get(fn contract_self_sponsoring): map hasher(twox_64_concat) T::AccountId => bool;439        pub ContractSponsorBasket get(fn contract_sponsor_basket): map hasher(twox_64_concat) (T::AccountId, T::AccountId) => T::BlockNumber;440        pub ContractSponsoringRateLimit get(fn contract_sponsoring_rate_limit): map hasher(twox_64_concat) T::AccountId => T::BlockNumber;441        pub ContractWhiteListEnabled get(fn contract_white_list_enabled): map hasher(twox_64_concat) T::AccountId => bool; 442        pub ContractWhiteList get(fn contract_white_list): double_map hasher(twox_64_concat) T::AccountId, hasher(twox_64_concat) T::AccountId => bool; 443    }444    add_extra_genesis {445        build(|config: &GenesisConfig<T>| {446            // Modification of storage447            for (_num, _c) in &config.collection {448                <Module<T>>::init_collection(_c);449            }450451            for (_num, _q, _i) in &config.nft_item_id {452                <Module<T>>::init_nft_token(_i);453            }454455            for (_num, _q, _i) in &config.fungible_item_id {456                <Module<T>>::init_fungible_token(_i);457            }458459            for (_num, _q, _i) in &config.refungible_item_id {460                <Module<T>>::init_refungible_token(_i);461            }462        })463    }464}465466decl_event!(467    pub enum Event<T>468    where469        AccountId = <T as system::Trait>::AccountId,470    {471        /// New collection was created472        /// 473        /// # Arguments474        /// 475        /// * collection_id: Globally unique identifier of newly created collection.476        /// 477        /// * mode: [CollectionMode] converted into u8.478        /// 479        /// * account_id: Collection owner.480        Created(CollectionId, u8, AccountId),481482        /// New item was created.483        /// 484        /// # Arguments485        /// 486        /// * collection_id: Id of the collection where item was created.487        /// 488        /// * item_id: Id of an item. Unique within the collection.489        ItemCreated(CollectionId, TokenId),490491        /// Collection item was burned.492        /// 493        /// # Arguments494        /// 495        /// collection_id.496        /// 497        /// item_id: Identifier of burned NFT.498        ItemDestroyed(CollectionId, TokenId),499    }500);501502decl_module! {503    pub struct Module<T: Trait> for enum Call where origin: T::Origin {504505        fn deposit_event() = default;506        type Error = Error<T>;507508        fn on_initialize(now: T::BlockNumber) -> Weight {509510            if ChainVersion::get() < 2511            {512                let value = NextCollectionID::get();513                CreatedCollectionCount::put(value);514                ChainVersion::put(2);515            }516517            0518        }519520        /// 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.521        /// 522        /// # Permissions523        /// 524        /// * Anyone.525        /// 526        /// # Arguments527        /// 528        /// * collection_name: UTF-16 string with collection name (limit 64 characters), will be stored as zero-terminated.529        /// 530        /// * collection_description: UTF-16 string with collection description (limit 256 characters), will be stored as zero-terminated.531        /// 532        /// * token_prefix: UTF-8 string with token prefix.533        /// 534        /// * mode: [CollectionMode] collection type and type dependent data.535        // returns collection ID536        #[weight = T::WeightInfo::create_collection()]537        pub fn create_collection(origin,538                                 collection_name: Vec<u16>,539                                 collection_description: Vec<u16>,540                                 token_prefix: Vec<u8>,541                                 mode: CollectionMode) -> DispatchResult {542543            // Anyone can create a collection544            let who = ensure_signed(origin)?;545546            let decimal_points = match mode {547                CollectionMode::Fungible(points) => points,548                CollectionMode::ReFungible(points) => points,549                _ => 0550            };551552            // bound Total number of collections553            ensure!(CollectionCount::get() < ChainLimit::get().collection_numbers_limit, Error::<T>::TotalCollectionsLimitExceeded);554555            // check params556            ensure!(decimal_points <= MAX_DECIMAL_POINTS, Error::<T>::CollectionDecimalPointLimitExceeded);557558            let mut name = collection_name.to_vec();559            name.push(0);560            ensure!(name.len() <= 64, Error::<T>::CollectionNameLimitExceeded);561562            let mut description = collection_description.to_vec();563            description.push(0);564            ensure!(name.len() <= 256, Error::<T>::CollectionDescriptionLimitExceeded);565566            let mut prefix = token_prefix.to_vec();567            prefix.push(0);568            ensure!(prefix.len() <= 16, Error::<T>::CollectionTokenPrefixLimitExceeded);569570            // Generate next collection ID571            let next_id = CreatedCollectionCount::get()572                .checked_add(1)573                .ok_or(Error::<T>::NumOverflow)?;574575            // bound counter576            let total = CollectionCount::get()577                .checked_add(1)578                .ok_or(Error::<T>::NumOverflow)?;579580            CreatedCollectionCount::put(next_id);581            CollectionCount::put(total);582583            // Create new collection584            let new_collection = CollectionType {585                owner: who.clone(),586                name: name,587                mode: mode.clone(),588                mint_mode: false,589                access: AccessMode::Normal,590                description: description,591                decimal_points: decimal_points,592                token_prefix: prefix,593                offchain_schema: Vec::new(),594                schema_version: SchemaVersion::ImageURL,595                sponsor: T::AccountId::default(),596                unconfirmed_sponsor: T::AccountId::default(),597                variable_on_chain_schema: Vec::new(),598                const_on_chain_schema: Vec::new(),599                limits: CollectionLimits::default(),600            };601602            // Add new collection to map603            <Collection<T>>::insert(next_id, new_collection);604605            // call event606            Self::deposit_event(RawEvent::Created(next_id, mode.into(), who.clone()));607608            Ok(())609        }610611        /// **DANGEROUS**: Destroys collection and all NFTs within this collection. Users irrecoverably lose their assets and may lose real money.612        /// 613        /// # Permissions614        /// 615        /// * Collection Owner.616        /// 617        /// # Arguments618        /// 619        /// * collection_id: collection to destroy.620        #[weight = T::WeightInfo::destroy_collection()]621        pub fn destroy_collection(origin, collection_id: CollectionId) -> DispatchResult {622623            let sender = ensure_signed(origin)?;624            Self::check_owner_permissions(collection_id, sender)?;625626            <AddressTokens<T>>::remove_prefix(collection_id);627            <ApprovedList<T>>::remove_prefix(collection_id);628            <Balance<T>>::remove_prefix(collection_id);629            <ItemListIndex>::remove(collection_id);630            <AdminList<T>>::remove(collection_id);631            <Collection<T>>::remove(collection_id);632            <WhiteList<T>>::remove_prefix(collection_id);633634            <NftItemList<T>>::remove_prefix(collection_id);635            <FungibleItemList<T>>::remove_prefix(collection_id);636            <ReFungibleItemList<T>>::remove_prefix(collection_id);637638            <NftTransferBasket<T>>::remove_prefix(collection_id);639            <FungibleTransferBasket<T>>::remove_prefix(collection_id);640            <ReFungibleTransferBasket<T>>::remove_prefix(collection_id);641642            if CollectionCount::get() > 0643            {644                // bound couter645                let total = CollectionCount::get()646                    .checked_sub(1)647                    .ok_or(Error::<T>::NumOverflow)?;648649                CollectionCount::put(total);650            }651652            Ok(())653        }654655        /// Add an address to white list.656        /// 657        /// # Permissions658        /// 659        /// * Collection Owner660        /// * Collection Admin661        /// 662        /// # Arguments663        /// 664        /// * collection_id.665        /// 666        /// * address.667        #[weight = T::WeightInfo::add_to_white_list()]668        pub fn add_to_white_list(origin, collection_id: CollectionId, address: T::AccountId) -> DispatchResult{669670            let sender = ensure_signed(origin)?;671            Self::check_owner_or_admin_permissions(collection_id, sender)?;672673            <WhiteList<T>>::insert(collection_id, address, true);674            675            Ok(())676        }677678        /// Remove an address from white list.679        /// 680        /// # Permissions681        /// 682        /// * Collection Owner683        /// * Collection Admin684        /// 685        /// # Arguments686        /// 687        /// * collection_id.688        /// 689        /// * address.690        #[weight = T::WeightInfo::remove_from_white_list()]691        pub fn remove_from_white_list(origin, collection_id: CollectionId, address: T::AccountId) -> DispatchResult{692693            let sender = ensure_signed(origin)?;694            Self::check_owner_or_admin_permissions(collection_id, sender)?;695696            <WhiteList<T>>::remove(collection_id, address);697698            Ok(())699        }700701        /// Toggle between normal and white list access for the methods with access for `Anyone`.702        /// 703        /// # Permissions704        /// 705        /// * Collection Owner.706        /// 707        /// # Arguments708        /// 709        /// * collection_id.710        /// 711        /// * mode: [AccessMode]712        #[weight = T::WeightInfo::set_public_access_mode()]713        pub fn set_public_access_mode(origin, collection_id: CollectionId, mode: AccessMode) -> DispatchResult714        {715            let sender = ensure_signed(origin)?;716717            Self::check_owner_permissions(collection_id, sender)?;718            let mut target_collection = <Collection<T>>::get(collection_id);719            target_collection.access = mode;720            <Collection<T>>::insert(collection_id, target_collection);721722            Ok(())723        }724725        /// Allows Anyone to create tokens if:726        /// * White List is enabled, and727        /// * Address is added to white list, and728        /// * This method was called with True parameter729        /// 730        /// # Permissions731        /// * Collection Owner732        ///733        /// # Arguments734        /// 735        /// * collection_id.736        /// 737        /// * mint_permission: Boolean parameter. If True, allows minting to Anyone with conditions above.738        #[weight = T::WeightInfo::set_mint_permission()]739        pub fn set_mint_permission(origin, collection_id: CollectionId, mint_permission: bool) -> DispatchResult740        {741            let sender = ensure_signed(origin)?;742743            Self::check_owner_permissions(collection_id, sender)?;744            let mut target_collection = <Collection<T>>::get(collection_id);745            target_collection.mint_mode = mint_permission;746            <Collection<T>>::insert(collection_id, target_collection);747748            Ok(())749        }750751        /// Change the owner of the collection.752        /// 753        /// # Permissions754        /// 755        /// * Collection Owner.756        /// 757        /// # Arguments758        /// 759        /// * collection_id.760        /// 761        /// * new_owner.762        #[weight = T::WeightInfo::change_collection_owner()]763        pub fn change_collection_owner(origin, collection_id: CollectionId, new_owner: T::AccountId) -> DispatchResult {764765            let sender = ensure_signed(origin)?;766            Self::check_owner_permissions(collection_id, sender)?;767            let mut target_collection = <Collection<T>>::get(collection_id);768            target_collection.owner = new_owner;769            <Collection<T>>::insert(collection_id, target_collection);770771            Ok(())772        }773774        /// Adds an admin of the Collection.775        /// 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. 776        /// 777        /// # Permissions778        /// 779        /// * Collection Owner.780        /// * Collection Admin.781        /// 782        /// # Arguments783        /// 784        /// * collection_id: ID of the Collection to add admin for.785        /// 786        /// * new_admin_id: Address of new admin to add.787        #[weight = T::WeightInfo::add_collection_admin()]788        pub fn add_collection_admin(origin, collection_id: CollectionId, new_admin_id: T::AccountId) -> DispatchResult {789790            let sender = ensure_signed(origin)?;791            Self::check_owner_or_admin_permissions(collection_id, sender)?;792            let mut admin_arr: Vec<T::AccountId> = Vec::new();793794            if <AdminList<T>>::contains_key(collection_id)795            {796                admin_arr = <AdminList<T>>::get(collection_id);797                ensure!(!admin_arr.contains(&new_admin_id), Error::<T>::AlreadyAdmin);798            }799800            // Number of collection admins801            ensure!((admin_arr.len() as u64) < ChainLimit::get().collections_admins_limit, Error::<T>::CollectionAdminsLimitExceeded);802803            admin_arr.push(new_admin_id);804            <AdminList<T>>::insert(collection_id, admin_arr);805806            Ok(())807        }808809        /// 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.810        ///811        /// # Permissions812        /// 813        /// * Collection Owner.814        /// * Collection Admin.815        /// 816        /// # Arguments817        /// 818        /// * collection_id: ID of the Collection to remove admin for.819        /// 820        /// * account_id: Address of admin to remove.821        #[weight = T::WeightInfo::remove_collection_admin()]822        pub fn remove_collection_admin(origin, collection_id: CollectionId, account_id: T::AccountId) -> DispatchResult {823824            let sender = ensure_signed(origin)?;825            Self::check_owner_or_admin_permissions(collection_id, sender)?;826827            if <AdminList<T>>::contains_key(collection_id)828            {829                let mut admin_arr = <AdminList<T>>::get(collection_id);830                admin_arr.retain(|i| *i != account_id);831                <AdminList<T>>::insert(collection_id, admin_arr);832            }833834            Ok(())835        }836837        /// # Permissions838        /// 839        /// * Collection Owner840        /// 841        /// # Arguments842        /// 843        /// * collection_id.844        /// 845        /// * new_sponsor.846        #[weight = T::WeightInfo::set_collection_sponsor()]847        pub fn set_collection_sponsor(origin, collection_id: CollectionId, new_sponsor: T::AccountId) -> DispatchResult {848849            let sender = ensure_signed(origin)?;850            ensure!(<Collection<T>>::contains_key(collection_id), Error::<T>::CollectionNotFound);851852            let mut target_collection = <Collection<T>>::get(collection_id);853            ensure!(sender == target_collection.owner, Error::<T>::NoPermission);854855            target_collection.unconfirmed_sponsor = new_sponsor;856            <Collection<T>>::insert(collection_id, target_collection);857858            Ok(())859        }860861        /// # Permissions862        /// 863        /// * Sponsor.864        /// 865        /// # Arguments866        /// 867        /// * collection_id.868        #[weight = T::WeightInfo::confirm_sponsorship()]869        pub fn confirm_sponsorship(origin, collection_id: CollectionId) -> DispatchResult {870871            let sender = ensure_signed(origin)?;872            ensure!(<Collection<T>>::contains_key(collection_id), Error::<T>::CollectionNotFound);873874            let mut target_collection = <Collection<T>>::get(collection_id);875            ensure!(sender == target_collection.unconfirmed_sponsor, Error::<T>::ConfirmUnsetSponsorFail);876877            target_collection.sponsor = target_collection.unconfirmed_sponsor;878            target_collection.unconfirmed_sponsor = T::AccountId::default();879            <Collection<T>>::insert(collection_id, target_collection);880881            Ok(())882        }883884        /// Switch back to pay-per-own-transaction model.885        ///886        /// # Permissions887        ///888        /// * Collection owner.889        /// 890        /// # Arguments891        /// 892        /// * collection_id.893        #[weight = T::WeightInfo::remove_collection_sponsor()]894        pub fn remove_collection_sponsor(origin, collection_id: CollectionId) -> DispatchResult {895896            let sender = ensure_signed(origin)?;897            ensure!(<Collection<T>>::contains_key(collection_id), Error::<T>::CollectionNotFound);898899            let mut target_collection = <Collection<T>>::get(collection_id);900            ensure!(sender == target_collection.owner, Error::<T>::NoPermission);901902            target_collection.sponsor = T::AccountId::default();903            <Collection<T>>::insert(collection_id, target_collection);904905            Ok(())906        }907908        /// This method creates a concrete instance of NFT Collection created with CreateCollection method.909        /// 910        /// # Permissions911        /// 912        /// * Collection Owner.913        /// * Collection Admin.914        /// * Anyone if915        ///     * White List is enabled, and916        ///     * Address is added to white list, and917        ///     * MintPermission is enabled (see SetMintPermission method)918        /// 919        /// # Arguments920        /// 921        /// * collection_id: ID of the collection.922        /// 923        /// * owner: Address, initial owner of the NFT.924        ///925        /// * data: Token data to store on chain.926        // #[weight =927        // (130_000_000 as Weight)928        // .saturating_add((2135 as Weight).saturating_mul((properties.len() as u64) as Weight))929        // .saturating_add(RocksDbWeight::get().reads(10 as Weight))930        // .saturating_add(RocksDbWeight::get().writes(8 as Weight))]931932        #[weight = T::WeightInfo::create_item(data.len())]933        pub fn create_item(origin, collection_id: CollectionId, owner: T::AccountId, data: CreateItemData) -> DispatchResult {934935            let sender = ensure_signed(origin)?;936937            Self::collection_exists(collection_id)?;938939            let target_collection = <Collection<T>>::get(collection_id);940941            Self::can_create_items_in_collection(collection_id, &target_collection, &sender, &owner)?;942            Self::validate_create_item_args(&target_collection, &data)?;943            Self::create_item_no_validation(collection_id, &target_collection, owner, data)?;944945            Ok(())946        }947948        /// This method creates multiple instances of NFT Collection created with CreateCollection method.949        /// 950        /// # Permissions951        /// 952        /// * Collection Owner.953        /// * Collection Admin.954        /// * Anyone if955        ///     * White List is enabled, and956        ///     * Address is added to white list, and957        ///     * MintPermission is enabled (see SetMintPermission method)958        /// 959        /// # Arguments960        /// 961        /// * collection_id: ID of the collection.962        /// 963        /// * itemsData: Array items properties. Each property is an array of bytes itself, see [create_item].964        /// 965        /// * owner: Address, initial owner of the NFT.966        #[weight = T::WeightInfo::create_item(items_data.into_iter()967                               .map(|data| { data.len() })968                               .sum())]969        pub fn create_multiple_items(origin, collection_id: CollectionId, owner: T::AccountId, items_data: Vec<CreateItemData>) -> DispatchResult {970971            ensure!(items_data.len() > 0, Error::<T>::EmptyArgument);972            let sender = ensure_signed(origin)?;973974            Self::collection_exists(collection_id)?;975            let target_collection = <Collection<T>>::get(collection_id);976977            Self::can_create_items_in_collection(collection_id, &target_collection, &sender, &owner)?;978979            for data in &items_data {980                Self::validate_create_item_args(&target_collection, data)?;981            }982            for data in &items_data {983                Self::create_item_no_validation(collection_id, &target_collection, owner.clone(), data.clone())?;984            }985986            Ok(())987        }988989        /// Destroys a concrete instance of NFT.990        /// 991        /// # Permissions992        /// 993        /// * Collection Owner.994        /// * Collection Admin.995        /// * Current NFT Owner.996        /// 997        /// # Arguments998        /// 999        /// * collection_id: ID of the collection.1000        /// 1001        /// * item_id: ID of NFT to burn.1002        #[weight = T::WeightInfo::burn_item()]1003        pub fn burn_item(origin, collection_id: CollectionId, item_id: TokenId) -> DispatchResult {10041005            let sender = ensure_signed(origin)?;1006            Self::collection_exists(collection_id)?;10071008            // Transfer permissions check1009            let target_collection = <Collection<T>>::get(collection_id);1010            ensure!(Self::is_item_owner(sender.clone(), collection_id, item_id) ||1011                Self::is_owner_or_admin_permissions(collection_id, sender.clone()),1012                Error::<T>::NoPermission);10131014            if target_collection.access == AccessMode::WhiteList {1015                Self::check_white_list(collection_id, &sender)?;1016            }10171018            match target_collection.mode1019            {1020                CollectionMode::NFT => Self::burn_nft_item(collection_id, item_id)?,1021                CollectionMode::Fungible(_)  => Self::burn_fungible_item(collection_id, item_id)?,1022                CollectionMode::ReFungible(_)  => Self::burn_refungible_item(collection_id, item_id, sender.clone())?,1023                _ => ()1024            };10251026            // call event1027            Self::deposit_event(RawEvent::ItemDestroyed(collection_id, item_id));10281029            Ok(())1030        }10311032        /// Change ownership of the token.1033        /// 1034        /// # Permissions1035        /// 1036        /// * Collection Owner1037        /// * Collection Admin1038        /// * Current NFT owner1039        ///1040        /// # Arguments1041        /// 1042        /// * recipient: Address of token recipient.1043        /// 1044        /// * collection_id.1045        /// 1046        /// * item_id: ID of the item1047        ///     * Non-Fungible Mode: Required.1048        ///     * Fungible Mode: Ignored.1049        ///     * Re-Fungible Mode: Required.1050        /// 1051        /// * value: Amount to transfer.1052        ///     * Non-Fungible Mode: Ignored1053        ///     * Fungible Mode: Must specify transferred amount1054        ///     * Re-Fungible Mode: Must specify transferred portion (between 0 and 1)1055        #[weight = T::WeightInfo::transfer()]1056        pub fn transfer(origin, recipient: T::AccountId, collection_id: CollectionId, item_id: TokenId, value: u128) -> DispatchResult {10571058            let sender = ensure_signed(origin)?;1059            let target_collection = <Collection<T>>::get(collection_id);10601061            // Limits check1062            Self::is_correct_transfer(collection_id, &target_collection, &recipient)?;10631064            // Transfer permissions check1065            ensure!(Self::is_item_owner(sender.clone(), collection_id, item_id) ||1066                Self::is_owner_or_admin_permissions(collection_id, sender.clone()),1067                Error::<T>::NoPermission);10681069            if target_collection.access == AccessMode::WhiteList {1070                Self::check_white_list(collection_id, &sender)?;1071                Self::check_white_list(collection_id, &recipient)?;1072            }10731074            match target_collection.mode1075            {1076                CollectionMode::NFT => Self::transfer_nft(collection_id, item_id, sender.clone(), recipient)?,1077                CollectionMode::Fungible(_)  => Self::transfer_fungible(collection_id, item_id, value, sender.clone(), recipient)?,1078                CollectionMode::ReFungible(_)  => Self::transfer_refungible(collection_id, item_id, value, sender.clone(), recipient)?,1079                _ => ()1080            };10811082            Ok(())1083        }10841085        /// Set, change, or remove approved address to transfer the ownership of the NFT.1086        /// 1087        /// # Permissions1088        /// 1089        /// * Collection Owner1090        /// * Collection Admin1091        /// * Current NFT owner1092        /// 1093        /// # Arguments1094        /// 1095        /// * approved: Address that is approved to transfer this NFT or zero (if needed to remove approval).1096        /// 1097        /// * collection_id.1098        /// 1099        /// * item_id: ID of the item.1100        #[weight = T::WeightInfo::approve()]1101        pub fn approve(origin, approved: T::AccountId, collection_id: CollectionId, item_id: TokenId) -> DispatchResult {11021103            let sender = ensure_signed(origin)?;11041105            // Transfer permissions check1106            let target_collection = <Collection<T>>::get(collection_id);1107            ensure!(Self::is_item_owner(sender.clone(), collection_id, item_id) ||1108                Self::is_owner_or_admin_permissions(collection_id, sender.clone()),1109                Error::<T>::NoPermission);11101111            if target_collection.access == AccessMode::WhiteList {1112                Self::check_white_list(collection_id, &sender)?;1113                Self::check_white_list(collection_id, &approved)?;1114            }11151116            // amount param stub1117            let amount = 100000000;11181119            let list_exists = <ApprovedList<T>>::contains_key(collection_id, (item_id, sender.clone()));1120            if list_exists {11211122                let mut list = <ApprovedList<T>>::get(collection_id, (item_id, sender.clone()));1123                let item_contains = list.iter().any(|i| i.approved == approved);11241125                if !item_contains {1126                    list.push(ApprovePermissions { approved: approved.clone(), amount: amount });1127                    <ApprovedList<T>>::insert(collection_id, (item_id, sender.clone()), list);1128                }1129            } else {11301131                let mut list = Vec::new();1132                list.push(ApprovePermissions { approved: approved.clone(), amount: amount });1133                <ApprovedList<T>>::insert(collection_id, (item_id, sender.clone()), list);1134            }11351136            Ok(())1137        }1138        1139        /// 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.1140        /// 1141        /// # Permissions1142        /// * Collection Owner1143        /// * Collection Admin1144        /// * Current NFT owner1145        /// * Address approved by current NFT owner1146        /// 1147        /// # Arguments1148        /// 1149        /// * from: Address that owns token.1150        /// 1151        /// * recipient: Address of token recipient.1152        /// 1153        /// * collection_id.1154        /// 1155        /// * item_id: ID of the item.1156        /// 1157        /// * value: Amount to transfer.1158        #[weight = T::WeightInfo::transfer_from()]1159        pub fn transfer_from(origin, from: T::AccountId, recipient: T::AccountId, collection_id: CollectionId, item_id: TokenId, value: u128 ) -> DispatchResult {11601161            let sender = ensure_signed(origin)?;1162            let mut appoved_transfer = false;11631164            // Check approve1165            if <ApprovedList<T>>::contains_key(collection_id, (item_id, from.clone())) {1166                let list_itm = <ApprovedList<T>>::get(collection_id, (item_id, from.clone()));1167                let opt_item = list_itm.iter().find(|i| i.approved == sender.clone());1168                if opt_item.is_some()1169                {1170                    appoved_transfer = true;1171                    ensure!(opt_item.unwrap().amount >= value, Error::<T>::TokenValueNotEnough);1172                }1173            }11741175            let target_collection = <Collection<T>>::get(collection_id);11761177            // Limits check1178            Self::is_correct_transfer(collection_id, &target_collection, &recipient)?;11791180            // Transfer permissions check         1181            ensure!(appoved_transfer || Self::is_owner_or_admin_permissions(collection_id, sender.clone()),1182            Error::<T>::NoPermission);11831184            if target_collection.access == AccessMode::WhiteList {1185                Self::check_white_list(collection_id, &sender)?;1186                Self::check_white_list(collection_id, &recipient)?;1187            }11881189            // remove approve1190            let approve_list: Vec<ApprovePermissions<T::AccountId>> = <ApprovedList<T>>::get(collection_id, (item_id, from.clone()))1191                .into_iter().filter(|i| i.approved != sender.clone()).collect();1192            <ApprovedList<T>>::insert(collection_id, (item_id, from.clone()), approve_list);119311941195            match target_collection.mode1196            {1197                CollectionMode::NFT => Self::transfer_nft(collection_id, item_id, from, recipient)?,1198                CollectionMode::Fungible(_)  => Self::transfer_fungible(collection_id, item_id, value, from.clone(), recipient)?,1199                CollectionMode::ReFungible(_)  => Self::transfer_refungible(collection_id, item_id, value, from.clone(), recipient)?,1200                _ => ()1201            };12021203            Ok(())1204        }12051206        #[weight = 0]1207        pub fn safe_transfer_from(origin, collection_id: CollectionId, item_id: TokenId, new_owner: T::AccountId) -> DispatchResult {12081209            // let no_perm_mes = "You do not have permissions to modify this collection";1210            // ensure!(<ApprovedList<T>>::contains_key((collection_id, item_id)), no_perm_mes);1211            // let list_itm = <ApprovedList<T>>::get((collection_id, item_id));1212            // ensure!(list_itm.contains(&new_owner.clone()), no_perm_mes);12131214            // // on_nft_received  call12151216            // Self::transfer(origin, collection_id, item_id, new_owner)?;12171218            Ok(())1219        }12201221        /// Set off-chain data schema.1222        /// 1223        /// # Permissions1224        /// 1225        /// * Collection Owner1226        /// * Collection Admin1227        /// 1228        /// # Arguments1229        /// 1230        /// * collection_id.1231        /// 1232        /// * schema: String representing the offchain data schema.1233        #[weight = T::WeightInfo::set_variable_meta_data()]1234        pub fn set_variable_meta_data (1235            origin,1236            collection_id: CollectionId,1237            item_id: TokenId,1238            data: Vec<u8>1239        ) -> DispatchResult {1240            let sender = ensure_signed(origin)?;1241            1242            Self::collection_exists(collection_id)?;1243            1244            ensure!(ChainLimit::get().custom_data_limit >= data.len() as u32, Error::<T>::TokenVariableDataLimitExceeded);12451246            // Modify permissions check1247            let target_collection = <Collection<T>>::get(collection_id);1248            ensure!(Self::is_item_owner(sender.clone(), collection_id, item_id) ||1249                Self::is_owner_or_admin_permissions(collection_id, sender.clone()),1250                Error::<T>::NoPermission);12511252            Self::item_exists(collection_id, item_id, &target_collection.mode)?;12531254            match target_collection.mode1255            {1256                CollectionMode::NFT => Self::set_nft_variable_data(collection_id, item_id, data)?,1257                CollectionMode::ReFungible(_)  => Self::set_re_fungible_variable_data(collection_id, item_id, data)?,1258                CollectionMode::Fungible(_) => fail!(Error::<T>::CantStoreMetadataInFungibleTokens),1259                _ => fail!(Error::<T>::UnexpectedCollectionType)1260            };12611262            Ok(())1263        }1264 1265        /// Set schema standard1266        /// ImageURL1267        /// Unique1268        /// 1269        /// # Permissions1270        /// 1271        /// * Collection Owner1272        /// * Collection Admin1273        /// 1274        /// # Arguments1275        /// 1276        /// * collection_id.1277        /// 1278        /// * schema: SchemaVersion: enum1279        #[weight = 0]1280        pub fn set_schema_version(1281            origin,1282            collection_id: CollectionId,1283            version: SchemaVersion1284        ) -> DispatchResult {1285            let sender = ensure_signed(origin)?;1286            Self::check_owner_or_admin_permissions(collection_id, sender.clone())?;1287            let mut target_collection = <Collection<T>>::get(collection_id);1288            target_collection.schema_version = version;1289            <Collection<T>>::insert(collection_id, target_collection);12901291            Ok(())1292        }12931294        /// Set off-chain data schema.1295        /// 1296        /// # Permissions1297        /// 1298        /// * Collection Owner1299        /// * Collection Admin1300        /// 1301        /// # Arguments1302        /// 1303        /// * collection_id.1304        /// 1305        /// * schema: String representing the offchain data schema.1306        #[weight = T::WeightInfo::set_offchain_schema()]1307        pub fn set_offchain_schema(1308            origin,1309            collection_id: CollectionId,1310            schema: Vec<u8>1311        ) -> DispatchResult {1312            let sender = ensure_signed(origin)?;1313            Self::check_owner_or_admin_permissions(collection_id, sender.clone())?;13141315            let mut target_collection = <Collection<T>>::get(collection_id);1316            target_collection.offchain_schema = schema;1317            <Collection<T>>::insert(collection_id, target_collection);13181319            Ok(())1320        }13211322        /// Set const on-chain data schema.1323        /// 1324        /// # Permissions1325        /// 1326        /// * Collection Owner1327        /// * Collection Admin1328        /// 1329        /// # Arguments1330        /// 1331        /// * collection_id.1332        /// 1333        /// * schema: String representing the const on-chain data schema.1334        #[weight = T::WeightInfo::set_const_on_chain_schema()]1335        pub fn set_const_on_chain_schema (1336            origin,1337            collection_id: CollectionId,1338            schema: Vec<u8>1339        ) -> DispatchResult {1340            let sender = ensure_signed(origin)?;1341            Self::check_owner_or_admin_permissions(collection_id, sender.clone())?;13421343            let mut target_collection = <Collection<T>>::get(collection_id);1344            target_collection.const_on_chain_schema = schema;1345            <Collection<T>>::insert(collection_id, target_collection);13461347            Ok(())1348        }13491350        /// Set variable on-chain data schema.1351        /// 1352        /// # Permissions1353        /// 1354        /// * Collection Owner1355        /// * Collection Admin1356        /// 1357        /// # Arguments1358        /// 1359        /// * collection_id.1360        /// 1361        /// * schema: String representing the variable on-chain data schema.1362        #[weight = T::WeightInfo::set_const_on_chain_schema()]1363        pub fn set_variable_on_chain_schema (1364            origin,1365            collection_id: CollectionId,1366            schema: Vec<u8>1367        ) -> DispatchResult {1368            let sender = ensure_signed(origin)?;1369            Self::check_owner_or_admin_permissions(collection_id, sender.clone())?;13701371            let mut target_collection = <Collection<T>>::get(collection_id);1372            target_collection.variable_on_chain_schema = schema;1373            <Collection<T>>::insert(collection_id, target_collection);13741375            Ok(())1376        }13771378        // Sudo permissions function1379        #[weight = 0]1380        pub fn set_chain_limits(1381            origin,1382            limits: ChainLimits1383        ) -> DispatchResult {1384            ensure_root(origin)?;1385            <ChainLimit>::put(limits);1386            Ok(())1387        }13881389        /// Enable smart contract self-sponsoring.1390        /// 1391        /// # Permissions1392        /// 1393        /// * Contract Owner1394        /// 1395        /// # Arguments1396        /// 1397        /// * contract address1398        /// * enable flag1399        /// 1400        #[weight = T::WeightInfo::enable_contract_sponsoring()]1401        pub fn enable_contract_sponsoring(1402            origin,1403            contract_address: T::AccountId,1404            enable: bool1405        ) -> DispatchResult {14061407            let sender = ensure_signed(origin)?;14081409            #[cfg(feature = "runtime-benchmarks")]1410            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());14111412            Self::ensure_contract_owned(sender, &contract_address)?;14131414            <ContractSelfSponsoring<T>>::insert(contract_address, enable);1415            Ok(())1416        }14171418        /// Set the rate limit for contract sponsoring to specified number of blocks.1419        /// 1420        /// If not set (has the default value of 0 blocks), the sponsoring will be disabled. 1421        /// If set to the number B (for blocks), the transactions will be sponsored with a rate 1422        /// limit of B, i.e. fees for every transaction sent to this smart contract will be paid 1423        /// from contract endowment if there are at least B blocks between such transactions. 1424        /// Nonetheless, if transactions are sent more frequently, the fees are paid by the sender.1425        /// 1426        /// # Permissions1427        /// 1428        /// * Contract Owner1429        /// 1430        /// # Arguments1431        /// 1432        /// -`contract_address`: Address of the contract to sponsor1433        /// -`rate_limit`: Number of blocks to wait until the next sponsored transaction is allowed1434        /// 1435        #[weight = 0]1436        pub fn set_contract_sponsoring_rate_limit(1437            origin,1438            contract_address: T::AccountId,1439            rate_limit: T::BlockNumber1440        ) -> DispatchResult {1441            let sender = ensure_signed(origin)?;1442            Self::ensure_contract_owned(sender, &contract_address)?;14431444            <ContractSponsoringRateLimit<T>>::insert(contract_address, rate_limit);1445            Ok(())1446        }14471448        /// Enable the white list for a contract. Only addresses added to the white list with addToContractWhiteList will be able to call this smart contract.1449        /// 1450        /// # Permissions1451        /// 1452        /// * Address that deployed smart contract.1453        /// 1454        /// # Arguments1455        /// 1456        /// -`contract_address`: Address of the contract.1457        /// 1458        /// - `enable`: .  1459        #[weight = 0]1460        pub fn toggle_contract_white_list(1461            origin,1462            contract_address: T::AccountId,1463            enable: bool1464        ) -> DispatchResult {1465            let sender = ensure_signed(origin)?;1466            Self::ensure_contract_owned(sender, &contract_address)?;14671468            <ContractWhiteListEnabled<T>>::insert(contract_address, enable);1469            Ok(())1470        }1471        1472        /// Add an address to smart contract white list.1473        /// 1474        /// # Permissions1475        /// 1476        /// * Address that deployed smart contract.1477        /// 1478        /// # Arguments1479        /// 1480        /// -`contract_address`: Address of the contract.1481        ///1482        /// -`account_address`: Address to add.1483        #[weight = 0]1484        pub fn add_to_contract_white_list(1485            origin,1486            contract_address: T::AccountId,1487            account_address: T::AccountId1488        ) -> DispatchResult {1489            let sender = ensure_signed(origin)?;1490            Self::ensure_contract_owned(sender, &contract_address)?;1491            1492            <ContractWhiteList<T>>::insert(contract_address, account_address, true);1493            Ok(())1494        }14951496        /// Remove an address from smart contract white list.1497        /// 1498        /// # Permissions1499        /// 1500        /// * Address that deployed smart contract.1501        /// 1502        /// # Arguments1503        /// 1504        /// -`contract_address`: Address of the contract.1505        ///1506        /// -`account_address`: Address to remove.1507        #[weight = 0]1508        pub fn remove_from_contract_white_list(1509            origin,1510            contract_address: T::AccountId,1511            account_address: T::AccountId1512        ) -> DispatchResult {1513            let sender = ensure_signed(origin)?;1514            Self::ensure_contract_owned(sender, &contract_address)?;1515            1516            <ContractWhiteList<T>>::remove(contract_address, account_address);1517            Ok(())1518        }15191520        #[weight = 0]1521        pub fn set_collection_limits(1522            origin,1523            collection_id: u32,1524            limits: CollectionLimits,1525        ) -> DispatchResult {1526            let sender = ensure_signed(origin)?;1527            Self::check_owner_permissions(collection_id, sender.clone())?;1528            let mut target_collection = <Collection<T>>::get(collection_id);1529            let chain_limits = ChainLimit::get();1530            let climits = target_collection.limits;15311532            // collection bounds1533            ensure!(limits.sponsor_transfer_timeout <= MAX_SPONSOR_TIMEOUT &&1534                limits.account_token_ownership_limit <= MAX_TOKEN_OWNERSHIP,  1535                Error::<T>::CollectionLimitBoundsExceeded);15361537            // token_limit   check  prev1538            ensure!(climits.token_limit > limits.token_limit && 1539                limits.token_limit <= chain_limits.account_token_ownership_limit, 1540                Error::<T>::AccountTokenLimitExceeded);15411542            target_collection.limits = limits;1543            <Collection<T>>::insert(collection_id, target_collection);15441545            Ok(())1546        } 1547    }1548}15491550impl<T: Trait> Module<T> {15511552    fn is_correct_transfer(collection_id: CollectionId, collection: &CollectionType<T::AccountId>, recipient: &T::AccountId) -> DispatchResult {15531554        // check token limit and account token limit1555        let account_items: u32 = <AddressTokens<T>>::get(collection_id, recipient).len() as u32;1556        ensure!(collection.limits.account_token_ownership_limit > account_items,  Error::<T>::AccountTokenLimitExceeded);1557        1558        Ok(())1559    }15601561    fn can_create_items_in_collection(collection_id: CollectionId, collection: &CollectionType<T::AccountId>, sender: &T::AccountId, owner: &T::AccountId) -> DispatchResult {15621563        // check token limit and account token limit1564        let total_items: u32 = ItemListIndex::get(collection_id);1565        let account_items: u32 = <AddressTokens<T>>::get(collection_id, owner).len() as u32;1566        ensure!(collection.limits.token_limit > total_items,  Error::<T>::CollectionTokenLimitExceeded);1567        ensure!(collection.limits.account_token_ownership_limit > account_items,  Error::<T>::AccountTokenLimitExceeded);15681569        if !Self::is_owner_or_admin_permissions(collection_id, sender.clone()) {1570            ensure!(collection.mint_mode == true, Error::<T>::PublicMintingNotAllowed);1571            Self::check_white_list(collection_id, owner)?;1572            Self::check_white_list(collection_id, sender)?;1573        }15741575        Ok(())1576    }15771578    fn validate_create_item_args(target_collection: &CollectionType<T::AccountId>, data: &CreateItemData) -> DispatchResult {1579        match target_collection.mode1580        {1581            CollectionMode::NFT => {1582                if let CreateItemData::NFT(data) = data {1583                    // check sizes1584                    ensure!(ChainLimit::get().custom_data_limit >= data.const_data.len() as u32, Error::<T>::TokenConstDataLimitExceeded);1585                    ensure!(ChainLimit::get().custom_data_limit >= data.variable_data.len() as u32, Error::<T>::TokenVariableDataLimitExceeded);1586                } else {1587                    fail!(Error::<T>::NotNftDataUsedToMintNftCollectionToken);1588                }1589            },1590            CollectionMode::Fungible(_) => {1591                if let CreateItemData::Fungible(_) = data {1592                } else {1593                    fail!(Error::<T>::NotFungibleDataUsedToMintFungibleCollectionToken);1594                }1595            },1596            CollectionMode::ReFungible(_) => {1597                if let CreateItemData::ReFungible(data) = data {15981599                    // check sizes1600                    ensure!(ChainLimit::get().custom_data_limit >= data.const_data.len() as u32, Error::<T>::TokenConstDataLimitExceeded);1601                    ensure!(ChainLimit::get().custom_data_limit >= data.variable_data.len() as u32, Error::<T>::TokenVariableDataLimitExceeded);1602                } else {1603                    fail!(Error::<T>::NotReFungibleDataUsedToMintReFungibleCollectionToken);1604                }1605            },1606            _ => { fail!(Error::<T>::UnexpectedCollectionType); }1607        };16081609        Ok(())1610    }16111612    fn create_item_no_validation(collection_id: CollectionId, collection: &CollectionType<T::AccountId>, owner: T::AccountId, data: CreateItemData) -> DispatchResult {1613        match data1614        {1615            CreateItemData::NFT(data) => {1616                let item = NftItemType {1617                    collection: collection_id,1618                    owner,1619                    const_data: data.const_data,1620                    variable_data: data.variable_data1621                };16221623                Self::add_nft_item(item)?;1624            },1625            CreateItemData::Fungible(_) => {1626                let item = FungibleItemType {1627                    collection: collection_id,1628                    owner,1629                    value: (10 as u128).pow(collection.decimal_points as u32)1630                };16311632                Self::add_fungible_item(item)?;1633            },1634            CreateItemData::ReFungible(data) => {1635                let mut owner_list = Vec::new();1636                let value = (10 as u128).pow(collection.decimal_points as u32);1637                owner_list.push(Ownership {owner: owner.clone(), fraction: value});16381639                let item = ReFungibleItemType {1640                    collection: collection_id,1641                    owner: owner_list,1642                    const_data: data.const_data,1643                    variable_data: data.variable_data1644                };16451646                Self::add_refungible_item(item)?;1647            }1648        };16491650        // call event1651        Self::deposit_event(RawEvent::ItemCreated(collection_id, <ItemListIndex>::get(collection_id)));16521653        Ok(())1654    }16551656    fn add_fungible_item(item: FungibleItemType<T::AccountId>) -> DispatchResult {1657        let current_index = <ItemListIndex>::get(item.collection)1658            .checked_add(1)1659            .ok_or(Error::<T>::NumOverflow)?;1660        let itemcopy = item.clone();1661        let owner = item.owner.clone();16621663        Self::add_token_index(item.collection, current_index, owner.clone())?;16641665        <ItemListIndex>::insert(item.collection, current_index);1666        <FungibleItemList<T>>::insert(item.collection, current_index, itemcopy);16671668        // Add current block1669        let v: Vec<BasketItem<T::AccountId, T::BlockNumber>> = Vec::new();1670        <FungibleTransferBasket<T>>::insert(item.collection, current_index, v);1671        1672        // Update balance1673        let new_balance = <Balance<T>>::get(item.collection, owner.clone())1674            .checked_add(item.value)1675            .ok_or(Error::<T>::NumOverflow)?;1676        <Balance<T>>::insert(item.collection, owner.clone(), new_balance);16771678        Ok(())1679    }16801681    fn add_refungible_item(item: ReFungibleItemType<T::AccountId>) -> DispatchResult {1682        let current_index = <ItemListIndex>::get(item.collection)1683            .checked_add(1)1684            .ok_or(Error::<T>::NumOverflow)?;1685        let itemcopy = item.clone();16861687        let value = item.owner.first().unwrap().fraction;1688        let owner = item.owner.first().unwrap().owner.clone();16891690        Self::add_token_index(item.collection, current_index, owner.clone())?;16911692        <ItemListIndex>::insert(item.collection, current_index);1693        <ReFungibleItemList<T>>::insert(item.collection, current_index, itemcopy);16941695        // Add current block1696        let block_number: T::BlockNumber = 0.into();1697        <ReFungibleTransferBasket<T>>::insert(item.collection, current_index, block_number);16981699        // Update balance1700        let new_balance = <Balance<T>>::get(item.collection, owner.clone())1701            .checked_add(value)1702            .ok_or(Error::<T>::NumOverflow)?;1703        <Balance<T>>::insert(item.collection, owner.clone(), new_balance);17041705        Ok(())1706    }17071708    fn add_nft_item(item: NftItemType<T::AccountId>) -> DispatchResult {1709        let current_index = <ItemListIndex>::get(item.collection)1710            .checked_add(1)1711            .ok_or(Error::<T>::NumOverflow)?;17121713        let item_owner = item.owner.clone();1714        let collection_id = item.collection.clone();1715        Self::add_token_index(collection_id, current_index, item.owner.clone())?;17161717        <ItemListIndex>::insert(collection_id, current_index);1718        <NftItemList<T>>::insert(collection_id, current_index, item);17191720        // Add current block1721        let block_number: T::BlockNumber = 0.into();1722        <NftTransferBasket<T>>::insert(collection_id, current_index, block_number);17231724        // Update balance1725        let new_balance = <Balance<T>>::get(collection_id, item_owner.clone())1726            .checked_add(1)1727            .ok_or(Error::<T>::NumOverflow)?;1728        <Balance<T>>::insert(collection_id, item_owner.clone(), new_balance);17291730        Ok(())1731    }17321733    fn burn_refungible_item(1734        collection_id: CollectionId,1735        item_id: TokenId,1736        owner: T::AccountId,1737    ) -> DispatchResult {1738        ensure!(1739            <ReFungibleItemList<T>>::contains_key(collection_id, item_id),1740            Error::<T>::TokenNotFound1741        );1742        let collection = <ReFungibleItemList<T>>::get(collection_id, item_id);1743        let item = collection1744            .owner1745            .iter()1746            .filter(|&i| i.owner == owner)1747            .next()1748            .unwrap();1749        Self::remove_token_index(collection_id, item_id, owner.clone())?;17501751        // remove approve list1752        <ApprovedList<T>>::remove(collection_id, (item_id, owner.clone()));17531754        // update balance1755        let new_balance = <Balance<T>>::get(collection_id, item.owner.clone())1756            .checked_sub(item.fraction)1757            .ok_or(Error::<T>::NumOverflow)?;1758        <Balance<T>>::insert(collection_id, item.owner.clone(), new_balance);17591760        <ReFungibleItemList<T>>::remove(collection_id, item_id);17611762        Ok(())1763    }17641765    fn burn_nft_item(collection_id: CollectionId, item_id: TokenId) -> DispatchResult {1766        ensure!(1767            <NftItemList<T>>::contains_key(collection_id, item_id),1768            Error::<T>::TokenNotFound1769        );1770        let item = <NftItemList<T>>::get(collection_id, item_id);1771        Self::remove_token_index(collection_id, item_id, item.owner.clone())?;17721773        // remove approve list1774        <ApprovedList<T>>::remove(collection_id, (item_id, item.owner.clone()));17751776        // update balance1777        let new_balance = <Balance<T>>::get(collection_id, item.owner.clone())1778            .checked_sub(1)1779            .ok_or(Error::<T>::NumOverflow)?;1780        <Balance<T>>::insert(collection_id, item.owner.clone(), new_balance);1781        <NftItemList<T>>::remove(collection_id, item_id);17821783        Ok(())1784    }17851786    fn burn_fungible_item(collection_id: CollectionId, item_id: TokenId) -> DispatchResult {1787        ensure!(1788            <FungibleItemList<T>>::contains_key(collection_id, item_id),1789            Error::<T>::TokenNotFound1790        );1791        let item = <FungibleItemList<T>>::get(collection_id, item_id);1792        Self::remove_token_index(collection_id, item_id, item.owner.clone())?;17931794        // remove approve list1795        <ApprovedList<T>>::remove(collection_id, (item_id, item.owner.clone()));17961797        // update balance1798        let new_balance = <Balance<T>>::get(collection_id, item.owner.clone())1799            .checked_sub(item.value)1800            .ok_or(Error::<T>::NumOverflow)?;1801        <Balance<T>>::insert(collection_id, item.owner.clone(), new_balance);18021803        <FungibleItemList<T>>::remove(collection_id, item_id);18041805        Ok(())1806    }18071808    fn collection_exists(collection_id: CollectionId) -> DispatchResult {1809        ensure!(1810            <Collection<T>>::contains_key(collection_id),1811            Error::<T>::CollectionNotFound1812        );1813        Ok(())1814    }18151816    fn check_owner_permissions(collection_id: CollectionId, subject: T::AccountId) -> DispatchResult {1817        Self::collection_exists(collection_id)?;18181819        let target_collection = <Collection<T>>::get(collection_id);1820        ensure!(1821            subject == target_collection.owner,1822            Error::<T>::NoPermission1823        );18241825        Ok(())1826    }18271828    fn is_owner_or_admin_permissions(collection_id: CollectionId, subject: T::AccountId) -> bool {1829        let target_collection = <Collection<T>>::get(collection_id);1830        let mut result: bool = subject == target_collection.owner;1831        let exists = <AdminList<T>>::contains_key(collection_id);18321833        if !result & exists {1834            if <AdminList<T>>::get(collection_id).contains(&subject) {1835                result = true1836            }1837        }18381839        result1840    }18411842    fn check_owner_or_admin_permissions(1843        collection_id: CollectionId,1844        subject: T::AccountId,1845    ) -> DispatchResult {1846        Self::collection_exists(collection_id)?;1847        let result = Self::is_owner_or_admin_permissions(collection_id, subject.clone());18481849        ensure!(1850            result,1851            Error::<T>::NoPermission1852        );1853        Ok(())1854    }18551856    fn is_item_owner(subject: T::AccountId, collection_id: CollectionId, item_id: TokenId) -> bool {1857        let target_collection = <Collection<T>>::get(collection_id);18581859        match target_collection.mode {1860            CollectionMode::NFT => {1861                <NftItemList<T>>::get(collection_id, item_id).owner == subject1862            }1863            CollectionMode::Fungible(_) => {1864                <FungibleItemList<T>>::get(collection_id, item_id).owner == subject1865            }1866            CollectionMode::ReFungible(_) => {1867                <ReFungibleItemList<T>>::get(collection_id, item_id)1868                    .owner1869                    .iter()1870                    .any(|i| i.owner == subject)1871            }1872            CollectionMode::Invalid => false,1873        }1874    }18751876    fn check_white_list(collection_id: CollectionId, address: &T::AccountId) -> DispatchResult {1877        let mes = Error::<T>::AddresNotInWhiteList;1878        ensure!(<WhiteList<T>>::contains_key(collection_id, address), mes);18791880        Ok(())1881    }18821883    fn transfer_fungible(1884        collection_id: CollectionId,1885        item_id: TokenId,1886        value: u128,1887        owner: T::AccountId,1888        new_owner: T::AccountId,1889    ) -> DispatchResult {1890        ensure!(1891            <FungibleItemList<T>>::contains_key(collection_id, item_id),1892            Error::<T>::TokenNotFound1893        );18941895        let full_item = <FungibleItemList<T>>::get(collection_id, item_id);1896        let amount = full_item.value;18971898        ensure!(amount >= value, Error::<T>::TokenValueTooLow);18991900        // update balance1901        let balance_old_owner = <Balance<T>>::get(collection_id, owner.clone())1902            .checked_sub(value)1903            .ok_or(Error::<T>::NumOverflow)?;1904        <Balance<T>>::insert(collection_id, owner.clone(), balance_old_owner);19051906        let mut new_owner_account_id = 0;1907        let new_owner_items = <AddressTokens<T>>::get(collection_id, new_owner.clone());1908        if new_owner_items.len() > 0 {1909            new_owner_account_id = new_owner_items[0];1910        }19111912        // transfer1913        if amount == value && new_owner_account_id == 0 {1914            // change owner1915            // new owner do not have account1916            let mut new_full_item = full_item.clone();1917            new_full_item.owner = new_owner.clone();1918            <FungibleItemList<T>>::insert(collection_id, item_id, new_full_item);19191920            // update balance1921            let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.clone())1922                .checked_add(value)1923                .ok_or(Error::<T>::NumOverflow)?;1924            <Balance<T>>::insert(collection_id, new_owner.clone(), balance_new_owner);19251926            // update index collection1927            Self::move_token_index(collection_id, item_id, owner.clone(), new_owner.clone())?;1928        } else {1929            let mut new_full_item = full_item.clone();1930            new_full_item.value -= value;19311932            // separate amount1933            if new_owner_account_id > 0 {1934                // new owner has account1935                let mut item = <FungibleItemList<T>>::get(collection_id, new_owner_account_id);1936                item.value += value;19371938                // update balance1939                let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.clone())1940                    .checked_add(value)1941                    .ok_or(Error::<T>::NumOverflow)?;1942                <Balance<T>>::insert(collection_id, new_owner.clone(), balance_new_owner);19431944                <FungibleItemList<T>>::insert(collection_id, new_owner_account_id, item);1945            } else {1946                // new owner do not have account1947                let item = FungibleItemType {1948                    collection: collection_id,1949                    owner: new_owner.clone(),1950                    value1951                };19521953                Self::add_fungible_item(item)?;1954            }19551956            if amount == value {1957                Self::remove_token_index(collection_id, item_id, full_item.owner.clone())?;19581959                // remove approve list1960                <ApprovedList<T>>::remove(collection_id, (item_id, full_item.owner.clone()));1961                <FungibleItemList<T>>::remove(collection_id, item_id);1962            }19631964            <FungibleItemList<T>>::insert(collection_id, item_id, new_full_item);1965        }19661967        Ok(())1968    }19691970    fn transfer_refungible(1971        collection_id: CollectionId,1972        item_id: TokenId,1973        value: u128,1974        owner: T::AccountId,1975        new_owner: T::AccountId,1976    ) -> DispatchResult {1977        ensure!(1978            <ReFungibleItemList<T>>::contains_key(collection_id, item_id),1979            Error::<T>::TokenNotFound1980        );19811982        let full_item = <ReFungibleItemList<T>>::get(collection_id, item_id);1983        let item = full_item1984            .owner1985            .iter()1986            .filter(|i| i.owner == owner)1987            .next()1988            .ok_or(Error::<T>::NumOverflow)?;1989        let amount = item.fraction;19901991        ensure!(amount >= value, Error::<T>::TokenValueTooLow);19921993        // update balance1994        let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.clone())1995            .checked_sub(value)1996            .ok_or(Error::<T>::NumOverflow)?;1997        <Balance<T>>::insert(collection_id, item.owner.clone(), balance_old_owner);19981999        let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.clone())2000            .checked_add(value)2001            .ok_or(Error::<T>::NumOverflow)?;2002        <Balance<T>>::insert(collection_id, new_owner.clone(), balance_new_owner);20032004        let old_owner = item.owner.clone();2005        let new_owner_has_account = full_item.owner.iter().any(|i| i.owner == new_owner);20062007        // transfer2008        if amount == value && !new_owner_has_account {2009            // change owner2010            // new owner do not have account2011            let mut new_full_item = full_item.clone();2012            new_full_item2013                .owner2014                .iter_mut()2015                .find(|i| i.owner == owner)2016                .unwrap()2017                .owner = new_owner.clone();2018            <ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);20192020            // update index collection2021            Self::move_token_index(collection_id, item_id, old_owner.clone(), new_owner.clone())?;2022        } else {2023            let mut new_full_item = full_item.clone();2024            new_full_item2025                .owner2026                .iter_mut()2027                .find(|i| i.owner == owner)2028                .unwrap()2029                .fraction -= value;20302031            // separate amount2032            if new_owner_has_account {2033                // new owner has account2034                new_full_item2035                    .owner2036                    .iter_mut()2037                    .find(|i| i.owner == new_owner)2038                    .unwrap()2039                    .fraction += value;2040            } else {2041                // new owner do not have account2042                new_full_item.owner.push(Ownership {2043                    owner: new_owner.clone(),2044                    fraction: value,2045                });2046                Self::add_token_index(collection_id, item_id, new_owner.clone())?;2047            }20482049            <ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);2050        }20512052        Ok(())2053    }20542055    fn transfer_nft(2056        collection_id: CollectionId,2057        item_id: TokenId,2058        sender: T::AccountId,2059        new_owner: T::AccountId,2060    ) -> DispatchResult {2061        ensure!(2062            <NftItemList<T>>::contains_key(collection_id, item_id),2063            Error::<T>::TokenNotFound2064        );20652066        let mut item = <NftItemList<T>>::get(collection_id, item_id);20672068        ensure!(2069            sender == item.owner,2070            Error::<T>::MustBeTokenOwner2071        );20722073        // update balance2074        let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.clone())2075            .checked_sub(1)2076            .ok_or(Error::<T>::NumOverflow)?;2077        <Balance<T>>::insert(collection_id, item.owner.clone(), balance_old_owner);20782079        let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.clone())2080            .checked_add(1)2081            .ok_or(Error::<T>::NumOverflow)?;2082        <Balance<T>>::insert(collection_id, new_owner.clone(), balance_new_owner);20832084        // change owner2085        let old_owner = item.owner.clone();2086        item.owner = new_owner.clone();2087        <NftItemList<T>>::insert(collection_id, item_id, item);20882089        // update index collection2090        Self::move_token_index(collection_id, item_id, old_owner.clone(), new_owner.clone())?;20912092        // reset approved list2093        <ApprovedList<T>>::remove(collection_id, (item_id, old_owner));2094        Ok(())2095    }2096    2097    fn item_exists(2098        collection_id: CollectionId,2099        item_id: TokenId,2100        mode: &CollectionMode2101    ) -> DispatchResult {2102        match mode {2103            CollectionMode::NFT => ensure!(<NftItemList<T>>::contains_key(collection_id, item_id), Error::<T>::TokenNotFound),2104            CollectionMode::ReFungible(_) => ensure!(<ReFungibleItemList<T>>::contains_key(collection_id, item_id), Error::<T>::TokenNotFound),2105            CollectionMode::Fungible(_) => ensure!(<FungibleItemList<T>>::contains_key(collection_id, item_id), Error::<T>::TokenNotFound),2106            _ => ()2107        };2108        2109        Ok(())2110    }21112112    fn set_re_fungible_variable_data(2113        collection_id: CollectionId,2114        item_id: TokenId,2115        data: Vec<u8>2116    ) -> DispatchResult {2117        let mut item = <ReFungibleItemList<T>>::get(collection_id, item_id);21182119        item.variable_data = data;21202121        <ReFungibleItemList<T>>::insert(collection_id, item_id, item);21222123        Ok(())2124    }21252126    fn set_nft_variable_data(2127        collection_id: CollectionId,2128        item_id: TokenId,2129        data: Vec<u8>2130    ) -> DispatchResult {2131        let mut item = <NftItemList<T>>::get(collection_id, item_id);2132        2133        item.variable_data = data;21342135        <NftItemList<T>>::insert(collection_id, item_id, item);2136        2137        Ok(())2138    }21392140    fn init_collection(item: &CollectionType<T::AccountId>) {2141        // check params2142        assert!(2143            item.decimal_points <= MAX_DECIMAL_POINTS,2144            "decimal_points parameter must be lower than MAX_DECIMAL_POINTS"2145        );2146        assert!(2147            item.name.len() <= 64,2148            "Collection name can not be longer than 63 char"2149        );2150        assert!(2151            item.name.len() <= 256,2152            "Collection description can not be longer than 255 char"2153        );2154        assert!(2155            item.token_prefix.len() <= 16,2156            "Token prefix can not be longer than 15 char"2157        );21582159        // Generate next collection ID2160        let next_id = CreatedCollectionCount::get()2161            .checked_add(1)2162            .unwrap();21632164        CreatedCollectionCount::put(next_id);2165    }21662167    fn init_nft_token(item: &NftItemType<T::AccountId>) {2168        let current_index = <ItemListIndex>::get(item.collection)2169            .checked_add(1)2170            .unwrap();21712172        let item_owner = item.owner.clone();2173        let collection_id = item.collection.clone();2174        Self::add_token_index(collection_id, current_index, item.owner.clone()).unwrap();21752176        <ItemListIndex>::insert(collection_id, current_index);21772178        // Update balance2179        let new_balance = <Balance<T>>::get(collection_id, item_owner.clone())2180            .checked_add(1)2181            .unwrap();2182        <Balance<T>>::insert(collection_id, item_owner.clone(), new_balance);2183    }21842185    fn init_fungible_token(item: &FungibleItemType<T::AccountId>) {2186        let current_index = <ItemListIndex>::get(item.collection)2187            .checked_add(1)2188            .unwrap();2189        let owner = item.owner.clone();21902191        Self::add_token_index(item.collection, current_index, owner.clone()).unwrap();21922193        <ItemListIndex>::insert(item.collection, current_index);21942195        // Update balance2196        let new_balance = <Balance<T>>::get(item.collection, owner.clone())2197            .checked_add(item.value)2198            .unwrap();2199        <Balance<T>>::insert(item.collection, owner.clone(), new_balance);2200    }22012202    fn init_refungible_token(item: &ReFungibleItemType<T::AccountId>) {2203        let current_index = <ItemListIndex>::get(item.collection)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(item.collection, current_index, owner.clone()).unwrap();22112212        <ItemListIndex>::insert(item.collection, current_index);22132214        // Update balance2215        let new_balance = <Balance<T>>::get(item.collection, owner.clone())2216            .checked_add(value)2217            .unwrap();2218        <Balance<T>>::insert(item.collection, owner.clone(), new_balance);2219    }22202221    fn add_token_index(collection_id: CollectionId, item_index: TokenId, owner: T::AccountId) -> DispatchResult {22222223        // add to account limit2224        if <AccountItemCount<T>>::contains_key(owner.clone()) {22252226            // bound Owned tokens by a single address2227            let count = <AccountItemCount<T>>::get(owner.clone());2228            ensure!(count < ChainLimit::get().account_token_ownership_limit, Error::<T>::AddressOwnershipLimitExceeded);22292230            <AccountItemCount<T>>::insert(owner.clone(), count2231                .checked_add(1)2232                .ok_or(Error::<T>::NumOverflow)?);2233        }2234        else {2235            <AccountItemCount<T>>::insert(owner.clone(), 1);2236        }22372238        let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner.clone());2239        if list_exists {2240            let mut list = <AddressTokens<T>>::get(collection_id, owner.clone());2241            let item_contains = list.contains(&item_index.clone());22422243            if !item_contains {2244                list.push(item_index.clone());2245            }22462247            <AddressTokens<T>>::insert(collection_id, owner.clone(), list);2248        } else {2249            let mut itm = Vec::new();2250            itm.push(item_index.clone());2251            <AddressTokens<T>>::insert(collection_id, owner, itm);2252            2253        }22542255        Ok(())2256    }22572258    fn remove_token_index(2259        collection_id: CollectionId,2260        item_index: TokenId,2261        owner: T::AccountId,2262    ) -> DispatchResult {22632264        // update counter2265        <AccountItemCount<T>>::insert(owner.clone(), 2266            <AccountItemCount<T>>::get(owner.clone())2267            .checked_sub(1)2268            .ok_or(Error::<T>::NumOverflow)?);226922702271        let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner.clone());2272        if list_exists {2273            let mut list = <AddressTokens<T>>::get(collection_id, owner.clone());2274            let item_contains = list.contains(&item_index.clone());22752276            if item_contains {2277                list.retain(|&item| item != item_index);2278                <AddressTokens<T>>::insert(collection_id, owner, list);2279            }2280        }22812282        Ok(())2283    }22842285    fn move_token_index(2286        collection_id: CollectionId,2287        item_index: TokenId,2288        old_owner: T::AccountId,2289        new_owner: T::AccountId,2290    ) -> DispatchResult {2291        Self::remove_token_index(collection_id, item_index, old_owner)?;2292        Self::add_token_index(collection_id, item_index, new_owner)?;22932294        Ok(())2295    }2296    2297    fn ensure_contract_owned(account: T::AccountId, contract: &T::AccountId) -> DispatchResult {2298        if <ContractOwner<T>>::contains_key(contract.clone()) {2299            let owner = <ContractOwner<T>>::get(contract);2300            ensure!(account == owner, Error::<T>::NoPermission);2301        } else {2302            fail!(Error::<T>::NoPermission);2303        }23042305        Ok(())2306    }2307}23082309////////////////////////////////////////////////////////////////////////////////////////////////////2310// Economic models2311// #region23122313/// Fee multiplier.2314pub type Multiplier = FixedU128;23152316type BalanceOf<T> = <<T as transaction_payment::Trait>::Currency as Currency<2317    <T as system::Trait>::AccountId,2318>>::Balance;2319type NegativeImbalanceOf<T> = <<T as transaction_payment::Trait>::Currency as Currency<2320    <T as system::Trait>::AccountId,2321>>::NegativeImbalance;23222323/// Require the transactor pay for themselves and maybe include a tip to gain additional priority2324/// in the queue.2325#[derive(Encode, Decode, Clone, Eq, PartialEq)]2326pub struct ChargeTransactionPayment<T: Trait + Send + Sync>(2327    #[codec(compact)] BalanceOf<T>2328);23292330impl<T: Trait + Send + Sync> sp_std::fmt::Debug2331    for ChargeTransactionPayment<T>2332{2333    #[cfg(feature = "std")]2334    fn fmt(&self, f: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {2335        write!(f, "ChargeTransactionPayment<{:?}>", self.0)2336    }2337    #[cfg(not(feature = "std"))]2338    fn fmt(&self, _: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {2339        Ok(())2340    }2341}23422343impl<T: Trait + Send + Sync> ChargeTransactionPayment<T>2344where2345    T::Call: Dispatchable<Info = DispatchInfo, PostInfo = PostDispatchInfo> + IsSubType<Call<T>> + IsSubType<pallet_contracts::Call<T>>,2346    BalanceOf<T>: Send + Sync + FixedPointOperand,2347{2348    /// utility constructor. Used only in client/factory code.2349    pub fn from(fee: BalanceOf<T>) -> Self {2350        Self(fee)2351    }23522353    pub fn traditional_fee(2354        len: usize,2355        info: &DispatchInfoOf<T::Call>,2356        tip: BalanceOf<T>,2357    ) -> BalanceOf<T>2358    where2359        T::Call: Dispatchable<Info = DispatchInfo>,2360    {2361        <transaction_payment::Module<T>>::compute_fee(len as u32, info, tip)2362    }23632364	fn get_priority(len: usize, info: &DispatchInfoOf<T::Call>, final_fee: BalanceOf<T>) -> TransactionPriority {2365		let weight_saturation = T::MaximumBlockWeight::get() / info.weight.max(1);2366		let len_saturation = T::MaximumBlockLength::get() as u64 / (len as u64).max(1);2367		let coefficient: BalanceOf<T> = weight_saturation.min(len_saturation).saturated_into::<BalanceOf<T>>();2368		final_fee.saturating_mul(coefficient).saturated_into::<TransactionPriority>()2369	}23702371    fn withdraw_fee(2372        &self,2373        who: &T::AccountId,2374        call: &T::Call,2375        info: &DispatchInfoOf<T::Call>,2376        len: usize,2377    ) -> Result<(BalanceOf<T>, Option<NegativeImbalanceOf<T>>), TransactionValidityError> {2378        let tip = self.0;23792380        // Set fee based on call type. Creating collection costs 1 Unique.2381        // All other transactions have traditional fees so far2382        // let fee = match call.is_sub_type() {2383        //     Some(Call::create_collection(..)) => <BalanceOf<T>>::from(1_000_000_000),2384        //     _ => Self::traditional_fee(len, info, tip), // Flat fee model, use only for testing purposes2385        //                                                 // _ => <BalanceOf<T>>::from(100)2386        // };2387        let fee = Self::traditional_fee(len, info, tip);23882389        // Determine who is paying transaction fee based on ecnomic model2390        // Parse call to extract collection ID and access collection sponsor2391        let mut sponsor: T::AccountId = match IsSubType::<Call<T>>::is_sub_type(call) {2392            Some(Call::create_item(collection_id, _owner, _properties)) => {23932394                // check free create limit2395                if <Collection<T>>::get(collection_id).limits.sponsored_data_size >= (_properties.len() as u32)2396                {2397                    <Collection<T>>::get(collection_id).sponsor2398                } else {2399                    T::AccountId::default()2400                }2401            }2402            Some(Call::transfer(_new_owner, collection_id, _item_id, _value)) => {2403                2404                let _collection_limits = <Collection<T>>::get(collection_id).limits;2405                let _collection_mode = <Collection<T>>::get(collection_id).mode;24062407                // sponsor timeout2408                let sponsor_transfer = match _collection_mode {2409                    CollectionMode::NFT => {24102411                        // get correct limit2412                        let limit: u32 = if _collection_limits.sponsor_transfer_timeout > 0 {2413                            _collection_limits.sponsor_transfer_timeout2414                        } else {2415                            ChainLimit::get().nft_sponsor_transfer_timeout2416                        };24172418                        let basket = <NftTransferBasket<T>>::get(collection_id, _item_id);2419                        let block_number = <system::Module<T>>::block_number() as T::BlockNumber;2420                        let limit_time = basket + limit.into();2421                        if block_number >= limit_time {2422                            <NftTransferBasket<T>>::insert(collection_id, _item_id, block_number);2423                            true2424                        }2425                        else {2426                            false2427                        }2428                    }2429                    CollectionMode::Fungible(_) => {24302431                        // get correct limit2432                        let limit: u32 = if _collection_limits.sponsor_transfer_timeout > 0 {2433                            _collection_limits.sponsor_transfer_timeout2434                        } else {2435                            ChainLimit::get().fungible_sponsor_transfer_timeout2436                        };24372438                        let mut basket = <FungibleTransferBasket<T>>::get(collection_id, _item_id);2439                        let block_number = <system::Module<T>>::block_number() as T::BlockNumber;2440                        if basket.iter().any(|i| i.address == _new_owner.clone())2441                        {2442                            let item = basket.iter_mut().find(|i| i.address == _new_owner.clone()).unwrap().clone();2443                            let limit_time = item.start_block + limit.into();2444                            if block_number >= limit_time {2445                                basket.retain(|x| x.address == item.address);2446                                basket.push(BasketItem { start_block: block_number, address: _new_owner.clone() });2447                                <FungibleTransferBasket<T>>::insert(collection_id, _item_id, basket);2448                                true2449                            }2450                            else {2451                                false2452                            }2453                        }2454                        else {2455                            basket.push(BasketItem { start_block: block_number, address: _new_owner.clone()});2456                            true2457                        }2458                    }2459                    CollectionMode::ReFungible(_) => {24602461                        // get correct limit2462                        let limit: u32 = if _collection_limits.sponsor_transfer_timeout > 0 {2463                            _collection_limits.sponsor_transfer_timeout2464                        } else {2465                            ChainLimit::get().refungible_sponsor_transfer_timeout2466                        };24672468                        let basket = <ReFungibleTransferBasket<T>>::get(collection_id, _item_id);2469                        let block_number = <system::Module<T>>::block_number() as T::BlockNumber;2470                        let limit_time = basket + limit.into();2471                        if block_number >= limit_time {2472                            <ReFungibleTransferBasket<T>>::insert(collection_id, _item_id, block_number);2473                            true2474                        } else {2475                            false2476                        }2477                    }2478                    _ => {2479                        false2480                    },2481                };24822483                if !sponsor_transfer {2484                    T::AccountId::default()2485                } else {2486                    <Collection<T>>::get(collection_id).sponsor2487                }2488            }24892490            _ => T::AccountId::default(),2491        };24922493        // Sponsor smart contracts2494        sponsor = match IsSubType::<pallet_contracts::Call<T>>::is_sub_type(call) {24952496            // On instantiation: set the contract owner2497            Some(pallet_contracts::Call::instantiate(_endowment, _gas_limit, code_hash, data)) => {24982499                let new_contract_address = <T as pallet_contracts::Trait>::DetermineContractAddress::contract_address_for(2500                    code_hash,2501                    &data,2502                    &who,2503                );2504                <ContractOwner<T>>::insert(new_contract_address.clone(), who.clone());25052506                T::AccountId::default()2507            },25082509            // When the contract is called, check if the sponsoring is enabled and pay fees from contract endowment if it is2510            Some(pallet_contracts::Call::call(dest, _value, _gas_limit, _data)) => {25112512                let called_contract: T::AccountId = T::Lookup::lookup((*dest).clone()).unwrap_or(T::AccountId::default());25132514                let owned_contract = <ContractOwner<T>>::contains_key(called_contract.clone())2515                  && <ContractOwner<T>>::get(called_contract.clone()) == *who;2516                let white_list_enabled = <ContractWhiteListEnabled<T>>::contains_key(called_contract.clone()) && <ContractWhiteListEnabled<T>>::get(called_contract.clone());2517                  2518                if !owned_contract && white_list_enabled {2519                    if !<ContractWhiteList<T>>::contains_key(called_contract.clone(), who) {2520                        return Err(InvalidTransaction::Call.into());2521                    }2522                }25232524                let mut sponsor_transfer = false;2525                if <ContractSponsoringRateLimit<T>>::contains_key(called_contract.clone()) {2526                    let last_tx_block = <ContractSponsorBasket<T>>::get((&called_contract, &who));2527                    let block_number = <system::Module<T>>::block_number() as T::BlockNumber;2528                    let rate_limit = <ContractSponsoringRateLimit<T>>::get(&called_contract);2529                    let limit_time = last_tx_block + rate_limit;25302531                    if block_number >= limit_time {2532                        <ContractSponsorBasket<T>>::insert((called_contract.clone(), who.clone()), block_number);2533                        sponsor_transfer = true;2534                    }2535                } else {2536                    sponsor_transfer = false;2537                }2538               2539                2540                let mut sp = T::AccountId::default();2541                if sponsor_transfer {2542                    if <ContractSelfSponsoring<T>>::contains_key(called_contract.clone()) {2543                        if <ContractSelfSponsoring<T>>::get(called_contract.clone()) {2544                            sp = called_contract;2545                        }2546                    }2547                }25482549                sp2550            },25512552            _ => sponsor,2553        };25542555        let mut who_pays_fee: T::AccountId = sponsor.clone();2556        if sponsor == T::AccountId::default() {2557            who_pays_fee = who.clone();2558        }25592560        // Only mess with balances if fee is not zero.2561        if fee.is_zero() {2562            return Ok((fee, None));2563        }25642565        match <T as transaction_payment::Trait>::Currency::withdraw(2566            &who_pays_fee,2567            fee,2568            if tip.is_zero() {2569                WithdrawReason::TransactionPayment.into()2570            } else {2571                WithdrawReason::TransactionPayment | WithdrawReason::Tip2572            },2573            ExistenceRequirement::KeepAlive,2574        ) {2575            Ok(imbalance) => Ok((fee, Some(imbalance))),2576            Err(_) => Err(InvalidTransaction::Payment.into()),2577        }2578    }2579}258025812582impl<T: Trait + Send + Sync> SignedExtension2583    for ChargeTransactionPayment<T>2584where2585    BalanceOf<T>: Send + Sync + From<u64> + FixedPointOperand,2586    T::Call: Dispatchable<Info = DispatchInfo, PostInfo = PostDispatchInfo> + IsSubType<Call<T>> + IsSubType<pallet_contracts::Call<T>>,2587{2588    const IDENTIFIER: &'static str = "ChargeTransactionPayment";2589    type AccountId = T::AccountId;2590    type Call = T::Call;2591    type AdditionalSigned = ();2592    type Pre = (2593        BalanceOf<T>,2594        Self::AccountId,2595        Option<NegativeImbalanceOf<T>>,2596        BalanceOf<T>,2597    );2598    fn additional_signed(&self) -> sp_std::result::Result<(), TransactionValidityError> {2599        Ok(())2600    }26012602    fn validate(2603        &self,2604        who: &Self::AccountId,2605        call: &Self::Call,2606        info: &DispatchInfoOf<Self::Call>,2607        len: usize,2608    ) -> TransactionValidity {2609		let (fee, _) = self.withdraw_fee(who, call, info, len)?;2610		Ok(ValidTransaction {2611			priority: Self::get_priority(len, info, fee),2612			..Default::default()2613		})2614    }26152616    fn pre_dispatch(2617        self,2618        who: &Self::AccountId,2619        call: &Self::Call,2620        info: &DispatchInfoOf<Self::Call>,2621        len: usize,2622    ) -> Result<Self::Pre, TransactionValidityError> {2623        let (fee, imbalance) = self.withdraw_fee(who, call, info, len)?;2624        Ok((self.0, who.clone(), imbalance, fee))2625    }26262627    fn post_dispatch(2628        pre: Self::Pre,2629        info: &DispatchInfoOf<Self::Call>,2630        post_info: &PostDispatchInfoOf<Self::Call>,2631        len: usize,2632        _result: &DispatchResult,2633    ) -> Result<(), TransactionValidityError> {2634        let (tip, who, imbalance, fee) = pre;2635        if let Some(payed) = imbalance {2636            let actual_fee = <transaction_payment::Module<T>>::compute_actual_fee(2637                len as u32, info, post_info, tip,2638            );2639            let refund = fee.saturating_sub(actual_fee);2640            let actual_payment =2641                match <T as transaction_payment::Trait>::Currency::deposit_into_existing(2642                    &who, refund,2643                ) {2644                    Ok(refund_imbalance) => {2645                        // The refund cannot be larger than the up front payed max weight.2646                        // `PostDispatchInfo::calc_unspent` guards against such a case.2647                        match payed.offset(refund_imbalance) {2648                            Ok(actual_payment) => actual_payment,2649                            Err(_) => return Err(InvalidTransaction::Payment.into()),2650                        }2651                    }2652                    // We do not recreate the account using the refund. The up front payment2653                    // is gone in that case.2654                    Err(_) => payed,2655                };2656            let imbalances = actual_payment.split(tip);2657            <T as transaction_payment::Trait>::OnTransactionPayment::on_unbalanceds(2658                Some(imbalances.0).into_iter().chain(Some(imbalances.1)),2659            );2660        }2661        Ok(())2662    }2663}26642665// #endregion