git.delta.rocks / unique-network / refs/commits / 25e7a6fa6d21

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 core::ops::{Deref, DerefMut};17use codec::{Decode, Encode};18pub use frame_support::{19    construct_runtime, decl_event, decl_module, decl_storage, decl_error,20    dispatch::DispatchResult,21    ensure, fail, parameter_types,22    traits::{23        Currency, ExistenceRequirement, Get, Imbalance, KeyOwnerProofSystem, OnUnbalanced,24        Randomness, IsSubType, WithdrawReasons,25    },26    weights::{27        constants::{BlockExecutionWeight, ExtrinsicBaseWeight, RocksDbWeight, WEIGHT_PER_SECOND},28        DispatchInfo, GetDispatchInfo, IdentityFee, Pays, PostDispatchInfo, Weight,29        WeightToFeePolynomial, DispatchClass,30    },31    StorageValue,32    transactional,33};3435use frame_system::{self as system, ensure_signed, ensure_root};36use sp_runtime::sp_std::prelude::Vec;37use sp_runtime::{38    traits::{39        Hash, DispatchInfoOf, Dispatchable, PostDispatchInfoOf, Saturating, SaturatedConversion, SignedExtension, Zero,40    },41    transaction_validity::{42        TransactionPriority, InvalidTransaction, TransactionValidity, TransactionValidityError, ValidTransaction,43    },44    FixedPointOperand, FixedU128,45};46use sp_runtime::traits::StaticLookup;47use pallet_contracts::chain_extension::UncheckedFrom;48use pallet_transaction_payment::OnChargeTransaction;4950#[cfg(test)]51mod mock;5253#[cfg(test)]54mod tests;5556mod default_weights;5758pub const MAX_DECIMAL_POINTS: DecimalPoints = 30;59pub const MAX_REFUNGIBLE_PIECES: u128 = 1_000_000_000_000_000_000_000;60pub const MAX_SPONSOR_TIMEOUT: u32 = 10_368_000;61pub const MAX_TOKEN_OWNERSHIP: u32 = 10_000_000;6263// Structs64// #region6566pub type CollectionId = u32;67pub type TokenId = u32;68pub type DecimalPoints = u8;6970#[derive(Encode, Decode, Eq, Debug, Clone, PartialEq)]71#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]72pub enum CollectionMode {73    Invalid,74    NFT,75    // decimal points76    Fungible(DecimalPoints),77    ReFungible,78}7980impl Default for CollectionMode {81    fn default() -> Self {82        Self::Invalid83    }84}8586impl Into<u8> for CollectionMode {87    fn into(self) -> u8 {88        match self {89            CollectionMode::Invalid => 0,90            CollectionMode::NFT => 1,91            CollectionMode::Fungible(_) => 2,92            CollectionMode::ReFungible => 3,93        }94    }95}9697#[derive(Encode, Decode, Eq, Debug, Clone, PartialEq)]98#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]99pub enum AccessMode {100    Normal,101    WhiteList,102}103impl Default for AccessMode {104    fn default() -> Self {105        Self::Normal106    }107}108109#[derive(Encode, Decode, Eq, Debug, Clone, PartialEq)]110#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]111pub enum SchemaVersion {112    ImageURL,113    Unique,114}115impl Default for SchemaVersion {116    fn default() -> Self {117        Self::ImageURL118    }119}120121#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]122#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]123pub struct Ownership<AccountId> {124    pub owner: AccountId,125    pub fraction: u128,126}127128#[derive(Encode, Decode, Debug, Clone, PartialEq)]129#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]130pub enum SponsorshipState<AccountId> {131    /// The fees are applied to the transaction sender132    Disabled,133    Unconfirmed(AccountId),134    /// Transactions are sponsored by specified account135    Confirmed(AccountId),136}137138impl<AccountId> SponsorshipState<AccountId> {139    fn sponsor(&self) -> Option<&AccountId> {140        match self {141            Self::Confirmed(sponsor) => Some(sponsor),142            _ => None,143        }144    }145146    fn pending_sponsor(&self) -> Option<&AccountId> {147        match self {148            Self::Unconfirmed(sponsor) | Self::Confirmed(sponsor) => Some(sponsor),149            _ => None,150        }151    }152153    fn confirmed(&self) -> bool {154        matches!(self, Self::Confirmed(_))155    }156}157158impl<T> Default for SponsorshipState<T> {159    fn default() -> Self {160        Self::Disabled161    }162}163164#[derive(Encode, Decode, Clone, PartialEq)]165#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]166pub struct Collection<T: Config> {167    pub owner: T::AccountId,168    pub mode: CollectionMode,169    pub access: AccessMode,170    pub decimal_points: DecimalPoints,171    pub name: Vec<u16>,        // 64 include null escape char172    pub description: Vec<u16>, // 256 include null escape char173    pub token_prefix: Vec<u8>, // 16 include null escape char174    pub mint_mode: bool,175    pub offchain_schema: Vec<u8>,176    pub schema_version: SchemaVersion,177    pub sponsorship: SponsorshipState<T::AccountId>,178    pub limits: CollectionLimits<T::BlockNumber>, // Collection private restrictions 179    pub variable_on_chain_schema: Vec<u8>, //180    pub const_on_chain_schema: Vec<u8>, //181}182183pub struct CollectionHandle<T: Config> {184    pub id: CollectionId,185    collection: Collection<T>,186}187188impl<T: Config> Deref for CollectionHandle<T> {189    type Target = Collection<T>;190191    fn deref(&self) -> &Self::Target {192        &self.collection193    }194}195196impl<T: Config> DerefMut for CollectionHandle<T> {197    fn deref_mut(&mut self) -> &mut Self::Target {198        &mut self.collection199    }200}201202#[derive(Encode, Decode, Debug, Clone, PartialEq)]203#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]204pub struct NftItemType<AccountId> {205    pub owner: AccountId,206    pub const_data: Vec<u8>,207    pub variable_data: Vec<u8>,208}209210#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]211#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]212pub struct FungibleItemType {213    pub value: u128,214}215216#[derive(Encode, Decode, Debug, Clone, PartialEq)]217#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]218pub struct ReFungibleItemType<AccountId> {219    pub owner: Vec<Ownership<AccountId>>,220    pub const_data: Vec<u8>,221    pub variable_data: Vec<u8>,222}223224// #[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]225// #[cfg_attr(feature = "std", derive(Serialize, Deserialize))]226// pub struct VestingItem<AccountId, Moment> {227//     pub sender: AccountId,228//     pub recipient: AccountId,229//     pub collection_id: CollectionId,230//     pub item_id: TokenId,231//     pub amount: u64,232//     pub vesting_date: Moment,233// }234235#[derive(Encode, Decode, Debug, Clone, PartialEq)]236#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]237pub struct CollectionLimits<BlockNumber: Encode + Decode> {238    pub account_token_ownership_limit: u32,239    pub sponsored_data_size: u32,240    /// None - setVariableMetadata is not sponsored241    /// Some(v) - setVariableMetadata is sponsored 242    ///           if there is v block between txs243    pub sponsored_data_rate_limit: Option<BlockNumber>,244    pub token_limit: u32,245246    // Timeouts for item types in passed blocks247    pub sponsor_transfer_timeout: u32,248    pub owner_can_transfer: bool,249    pub owner_can_destroy: bool,250}251252impl<BlockNumber: Encode + Decode> Default for CollectionLimits<BlockNumber> {253    fn default() -> Self {254        Self { 255            account_token_ownership_limit: 10_000_000, 256            token_limit: u32::max_value(),257            sponsored_data_size: u32::MAX, 258            sponsored_data_rate_limit: None,259            sponsor_transfer_timeout: 14400,260            owner_can_transfer: true,261            owner_can_destroy: true262        }263    }264}265266#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]267#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]268pub struct ChainLimits {269    pub collection_numbers_limit: u32,270    pub account_token_ownership_limit: u32,271    pub collections_admins_limit: u64,272    pub custom_data_limit: u32,273274    // Timeouts for item types in passed blocks275    pub nft_sponsor_transfer_timeout: u32,276    pub fungible_sponsor_transfer_timeout: u32,277    pub refungible_sponsor_transfer_timeout: u32,278279    // Schema limits280    pub offchain_schema_limit: u32,281    pub variable_on_chain_schema_limit: u32,282    pub const_on_chain_schema_limit: u32,283}284285pub trait WeightInfo {286	fn create_collection() -> Weight;287	fn destroy_collection() -> Weight;288	fn add_to_white_list() -> Weight;289	fn remove_from_white_list() -> Weight;290    fn set_public_access_mode() -> Weight;291    fn set_mint_permission() -> Weight;292    fn change_collection_owner() -> Weight;293    fn add_collection_admin() -> Weight;294    fn remove_collection_admin() -> Weight;295    fn set_collection_sponsor() -> Weight;296    fn confirm_sponsorship() -> Weight;297    fn remove_collection_sponsor() -> Weight;298    fn create_item(s: usize) -> Weight;299    fn burn_item() -> Weight;300    fn transfer() -> Weight;301    fn approve() -> Weight;302    fn transfer_from() -> Weight;303    fn set_offchain_schema() -> Weight;304    fn set_const_on_chain_schema() -> Weight;305    fn set_variable_on_chain_schema() -> Weight;306    fn set_variable_meta_data() -> Weight;307    fn enable_contract_sponsoring() -> Weight;308    fn set_schema_version() -> Weight;309    fn set_chain_limits() -> Weight;310    fn set_contract_sponsoring_rate_limit() -> Weight;311    fn set_variable_meta_data_sponsoring_rate_limit() -> Weight;312    fn toggle_contract_white_list() -> Weight;313    fn add_to_contract_white_list() -> Weight;314    fn remove_from_contract_white_list() -> Weight;315    fn set_collection_limits() -> Weight;316}317318#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]319#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]320pub struct CreateNftData {321    pub const_data: Vec<u8>,322    pub variable_data: Vec<u8>,323}324325#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]326#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]327pub struct CreateFungibleData {328    pub value: u128,329}330331#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]332#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]333pub struct CreateReFungibleData {334    pub const_data: Vec<u8>,335    pub variable_data: Vec<u8>,336    pub pieces: u128,337}338339#[derive(Encode, Decode, Debug, Clone, PartialEq)]340#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]341pub enum CreateItemData {342    NFT(CreateNftData),343    Fungible(CreateFungibleData),344    ReFungible(CreateReFungibleData),345}346347impl CreateItemData {348    pub fn len(&self) -> usize {349        let len = match self {350            CreateItemData::NFT(data) => data.variable_data.len() + data.const_data.len(),351            CreateItemData::ReFungible(data) => data.variable_data.len() + data.const_data.len(),352            _ => 0353        };354        355        return len;356    }357}358359impl From<CreateNftData> for CreateItemData {360    fn from(item: CreateNftData) -> Self {361        CreateItemData::NFT(item)362    }363}364365impl From<CreateReFungibleData> for CreateItemData {366    fn from(item: CreateReFungibleData) -> Self {367        CreateItemData::ReFungible(item)368    }369}370371impl From<CreateFungibleData> for CreateItemData {372    fn from(item: CreateFungibleData) -> Self {373        CreateItemData::Fungible(item)374    }375}376377378decl_error! {379	/// Error for non-fungible-token module.380	pub enum Error for Module<T: Config> {381        /// Total collections bound exceeded.382        TotalCollectionsLimitExceeded,383		/// Decimal_points parameter must be lower than MAX_DECIMAL_POINTS constant, currently it is 30.384        CollectionDecimalPointLimitExceeded, 385        /// Collection name can not be longer than 63 char.386        CollectionNameLimitExceeded, 387        /// Collection description can not be longer than 255 char.388        CollectionDescriptionLimitExceeded, 389        /// Token prefix can not be longer than 15 char.390        CollectionTokenPrefixLimitExceeded,391        /// This collection does not exist.392        CollectionNotFound,393        /// Item not exists.394        TokenNotFound,395        /// Admin not found396        AdminNotFound,397        /// Arithmetic calculation overflow.398        NumOverflow,       399        /// Account already has admin role.400        AlreadyAdmin,  401        /// You do not own this collection.402        NoPermission,403        /// This address is not set as sponsor, use setCollectionSponsor first.404        ConfirmUnsetSponsorFail,405        /// Collection is not in mint mode.406        PublicMintingNotAllowed,407        /// Sender parameter and item owner must be equal.408        MustBeTokenOwner,409        /// Item balance not enough.410        TokenValueTooLow,411        /// Size of item is too large.412        NftSizeLimitExceeded,413        /// No approve found414        ApproveNotFound,415        /// Requested value more than approved.416        TokenValueNotEnough,417        /// Only approved addresses can call this method.418        ApproveRequired,419        /// Address is not in white list.420        AddresNotInWhiteList,421        /// Number of collection admins bound exceeded.422        CollectionAdminsLimitExceeded,423        /// Owned tokens by a single address bound exceeded.424        AddressOwnershipLimitExceeded,425        /// Length of items properties must be greater than 0.426        EmptyArgument,427        /// const_data exceeded data limit.428        TokenConstDataLimitExceeded,429        /// variable_data exceeded data limit.430        TokenVariableDataLimitExceeded,431        /// Not NFT item data used to mint in NFT collection.432        NotNftDataUsedToMintNftCollectionToken,433        /// Not Fungible item data used to mint in Fungible collection.434        NotFungibleDataUsedToMintFungibleCollectionToken,435        /// Not Re Fungible item data used to mint in Re Fungible collection.436        NotReFungibleDataUsedToMintReFungibleCollectionToken,437        /// Unexpected collection type.438        UnexpectedCollectionType,439        /// Can't store metadata in fungible tokens.440        CantStoreMetadataInFungibleTokens,441        /// Collection token limit exceeded442        CollectionTokenLimitExceeded,443        /// Account token limit exceeded per collection444        AccountTokenLimitExceeded,445        /// Collection limit bounds per collection exceeded446        CollectionLimitBoundsExceeded,447        /// Tried to enable permissions which are only permitted to be disabled448        OwnerPermissionsCantBeReverted,449        /// Schema data size limit bound exceeded450        SchemaDataLimitExceeded,451        /// Maximum refungibility exceeded452        WrongRefungiblePieces,453        /// createRefungible should be called with one owner454        BadCreateRefungibleCall,455	}456}457458pub trait Config: system::Config + Sized + pallet_transaction_payment::Config + pallet_contracts::Config {459    type Event: From<Event<Self>> + Into<<Self as system::Config>::Event>;460461    /// Weight information for extrinsics in this pallet.462	type WeightInfo: WeightInfo;463464    type Currency: Currency<Self::AccountId>;465    type CollectionCreationPrice: Get<<<Self as Config>::Currency as Currency<Self::AccountId>>::Balance>;466    type TreasuryAccountId: Get<Self::AccountId>;467}468469#[cfg(feature = "runtime-benchmarks")]470mod benchmarking;471472// #endregion473474// # Used definitions475//476// ## User control levels477//478// chain-controlled - key is uncontrolled by user479//                    i.e autoincrementing index480//                    can use non-cryptographic hash481// real - key is controlled by user482//        but it is hard to generate enough colliding values, i.e owner of signed txs483//        can use non-cryptographic hash484// controlled - key is completly controlled by users485//              i.e maps with mutable keys486//              should use cryptographic hash487//488// ## User control level downgrade reasons489//490// ?1 - chain-controlled -> controlled491//      collections/tokens can be destroyed, resulting in massive holes492// ?2 - chain-controlled -> controlled493//      same as ?1, but can be only added, resulting in easier exploitation494// ?3 - real -> controlled495//      no confirmation required, so addresses can be easily generated496decl_storage! {497    trait Store for Module<T: Config> as Nft {498499        //#region Private members500        /// Id of next collection501        CreatedCollectionCount: u32;502        /// Used for migrations503        ChainVersion: u64;504        /// Id of last collection token505        /// Collection id (controlled?1)506        ItemListIndex: map hasher(blake2_128_concat) CollectionId => TokenId;507        //#endregion508509        //#region Chain limits struct510        pub ChainLimit get(fn chain_limit) config(): ChainLimits;511        //#endregion512513        //#region Bound counters514        /// Amount of collections destroyed, used for total amount tracking with515        /// CreatedCollectionCount516        DestroyedCollectionCount: u32;517        /// Total amount of account owned tokens (NFTs + RFTs + unique fungibles)518        /// Account id (real)519        pub AccountItemCount get(fn account_item_count): map hasher(twox_64_concat) T::AccountId => u32;520        //#endregion521522        //#region Basic collections523        /// Collection info524        /// Collection id (controlled?1)525        pub CollectionById get(fn collection_id) config(): map hasher(blake2_128_concat) CollectionId => Option<Collection<T>> = None;526        /// List of collection admins527        /// Collection id (controlled?2)528        pub AdminList get(fn admin_list_collection): map hasher(blake2_128_concat) CollectionId => Vec<T::AccountId>;529        /// Whitelisted collection users530        /// Collection id (controlled?2), user id (controlled?3)531        pub WhiteList get(fn white_list): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) T::AccountId => bool;532        //#endregion533534        /// How many of collection items user have535        /// Collection id (controlled?2), account id (real)536        pub Balance get(fn balance_count): double_map hasher(blake2_128_concat) CollectionId, hasher(twox_64_concat) T::AccountId => u128;537538        /// Amount of items which spender can transfer out of owners account (via transferFrom)539        /// Collection id (controlled?2), (token id (controlled ?2) + owner account id (real) + spender account id (controlled?3))540        /// TODO: Off chain worker should remove from this map when token gets removed541        pub Allowances get(fn approved): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) (TokenId, T::AccountId, T::AccountId) => u128;542543        //#region Item collections544        /// Collection id (controlled?2), token id (controlled?1)545        pub NftItemList get(fn nft_item_id) config(): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => Option<NftItemType<T::AccountId>>;546        /// Collection id (controlled?2), owner (controlled?2)547        pub FungibleItemList get(fn fungible_item_id) config(): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) T::AccountId => FungibleItemType;548        /// Collection id (controlled?2), token id (controlled?1)549        pub ReFungibleItemList get(fn refungible_item_id) config(): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => Option<ReFungibleItemType<T::AccountId>>;550        //#endregion551552        //#region Index list553        /// Collection id (controlled?2), tokens owner (controlled?2)554        pub AddressTokens get(fn address_tokens): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) T::AccountId => Vec<TokenId>;555        //#endregion556557        //#region Tokens transfer rate limit baskets558        /// (Collection id (controlled?2), who created (real))559        /// TODO: Off chain worker should remove from this map when collection gets removed560        pub CreateItemBasket get(fn create_item_basket): map hasher(blake2_128_concat) (CollectionId, T::AccountId) => T::BlockNumber;561        /// Collection id (controlled?2), token id (controlled?2)562        pub NftTransferBasket get(fn nft_transfer_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => T::BlockNumber;563        /// Collection id (controlled?2), owning user (real)564        pub FungibleTransferBasket get(fn fungible_transfer_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(twox_64_concat) T::AccountId => T::BlockNumber;565        /// Collection id (controlled?2), token id (controlled?2)566        pub ReFungibleTransferBasket get(fn refungible_transfer_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => T::BlockNumber;567        //#endregion568569        /// Variable metadata sponsoring570        /// Collection id (controlled?2), token id (controlled?2)571        pub VariableMetaDataBasket get(fn variable_meta_data_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => Option<T::BlockNumber> = None;572      573        //#region Contract Sponsorship and Ownership574        /// Contract address (real)575        pub ContractOwner get(fn contract_owner): map hasher(twox_64_concat) T::AccountId => Option<T::AccountId>;576        /// Contract address (real)577        pub ContractSelfSponsoring get(fn contract_self_sponsoring): map hasher(twox_64_concat) T::AccountId => bool;578        /// (Contract address(real), caller (real))579        pub ContractSponsorBasket get(fn contract_sponsor_basket): map hasher(twox_64_concat) (T::AccountId, T::AccountId) => T::BlockNumber;580        /// Contract address (real)581        pub ContractSponsoringRateLimit get(fn contract_sponsoring_rate_limit): map hasher(twox_64_concat) T::AccountId => T::BlockNumber;582        /// Contract address (real)583        pub ContractWhiteListEnabled get(fn contract_white_list_enabled): map hasher(twox_64_concat) T::AccountId => bool; 584        /// Contract address (real) => Whitelisted user (controlled?3)585        pub ContractWhiteList get(fn contract_white_list): double_map hasher(twox_64_concat) T::AccountId, hasher(blake2_128_concat) T::AccountId => bool; 586        //#endregion587    }588    add_extra_genesis {589        build(|config: &GenesisConfig<T>| {590            // Modification of storage591            for (_num, _c) in &config.collection_id {592                <Module<T>>::init_collection(_c);593            }594595            for (_num, _c, _i) in &config.nft_item_id {596                <Module<T>>::init_nft_token(*_c, _i);597            }598599            for (collection_id, account_id, fungible_item) in &config.fungible_item_id {600                <Module<T>>::init_fungible_token(*collection_id, account_id, fungible_item);601            }602603            for (_num, _c, _i) in &config.refungible_item_id {604                <Module<T>>::init_refungible_token(*_c, _i);605            }606        })607    }608}609610decl_event!(611    pub enum Event<T>612    where613        AccountId = <T as system::Config>::AccountId,614    {615        /// New collection was created616        /// 617        /// # Arguments618        /// 619        /// * collection_id: Globally unique identifier of newly created collection.620        /// 621        /// * mode: [CollectionMode] converted into u8.622        /// 623        /// * account_id: Collection owner.624        CollectionCreated(CollectionId, u8, AccountId),625626        /// New item was created.627        /// 628        /// # Arguments629        /// 630        /// * collection_id: Id of the collection where item was created.631        /// 632        /// * item_id: Id of an item. Unique within the collection.633        ///634        /// * recipient: Owner of newly created item 635        ItemCreated(CollectionId, TokenId, AccountId),636637        /// Collection item was burned.638        /// 639        /// # Arguments640        /// 641        /// collection_id.642        /// 643        /// item_id: Identifier of burned NFT.644        ItemDestroyed(CollectionId, TokenId),645646        /// Item was transferred647        ///648        /// * collection_id: Id of collection to which item is belong649        ///650        /// * item_id: Id of an item651        ///652        /// * sender: Original owner of item653        ///654        /// * recipient: New owner of item655        ///656        /// * amount: Always 1 for NFT657        Transfer(CollectionId, TokenId, AccountId, AccountId, u128),658659        /// * collection_id660        ///661        /// * item_id662        ///663        /// * sender664        ///665        /// * spender666        ///667        /// * amount668        Approved(CollectionId, TokenId, AccountId, AccountId, u128),669    }670);671672decl_module! {673    pub struct Module<T: Config> for enum Call 674    where 675        origin: T::Origin676    {677        fn deposit_event() = default;678        type Error = Error<T>;679680        fn on_initialize(now: T::BlockNumber) -> Weight {681            0682        }683684        /// 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.685        /// 686        /// # Permissions687        /// 688        /// * Anyone.689        /// 690        /// # Arguments691        /// 692        /// * collection_name: UTF-16 string with collection name (limit 64 characters), will be stored as zero-terminated.693        /// 694        /// * collection_description: UTF-16 string with collection description (limit 256 characters), will be stored as zero-terminated.695        /// 696        /// * token_prefix: UTF-8 string with token prefix.697        /// 698        /// * mode: [CollectionMode] collection type and type dependent data.699        // returns collection ID700        #[weight = <T as Config>::WeightInfo::create_collection()]701        #[transactional]702        pub fn create_collection(origin,703                                 collection_name: Vec<u16>,704                                 collection_description: Vec<u16>,705                                 token_prefix: Vec<u8>,706                                 mode: CollectionMode) -> DispatchResult {707708            // Anyone can create a collection709            let who = ensure_signed(origin)?;710711            // Take a (non-refundable) deposit of collection creation712            let mut imbalance = <<<T as Config>::Currency as Currency<T::AccountId>>::PositiveImbalance>::zero();713            imbalance.subsume(<<T as Config>::Currency as Currency<T::AccountId>>::deposit_creating(714                &T::TreasuryAccountId::get(),715                T::CollectionCreationPrice::get(),716            ));717            <T as Config>::Currency::settle(718                &who,719                imbalance,720                WithdrawReasons::TRANSFER,721                ExistenceRequirement::KeepAlive,722            ).map_err(|_| Error::<T>::NoPermission)?;723724            let decimal_points = match mode {725                CollectionMode::Fungible(points) => points,726                _ => 0727            };728729            let chain_limit = ChainLimit::get();730731            let created_count = CreatedCollectionCount::get();732            let destroyed_count = DestroyedCollectionCount::get();733734            // bound Total number of collections735            ensure!(created_count - destroyed_count < chain_limit.collection_numbers_limit, Error::<T>::TotalCollectionsLimitExceeded);736737            // check params738            ensure!(decimal_points <= MAX_DECIMAL_POINTS, Error::<T>::CollectionDecimalPointLimitExceeded);739            ensure!(collection_name.len() <= 64, Error::<T>::CollectionNameLimitExceeded);740            ensure!(collection_description.len() <= 256, Error::<T>::CollectionDescriptionLimitExceeded);741            ensure!(token_prefix.len() <= 16, Error::<T>::CollectionTokenPrefixLimitExceeded);742743            // Generate next collection ID744            let next_id = created_count745                .checked_add(1)746                .ok_or(Error::<T>::NumOverflow)?;747748            CreatedCollectionCount::put(next_id);749750            let limits = CollectionLimits {751                sponsored_data_size: chain_limit.custom_data_limit,752                ..Default::default()753            };754755            // Create new collection756            let new_collection = Collection {757                owner: who.clone(),758                name: collection_name,759                mode: mode.clone(),760                mint_mode: false,761                access: AccessMode::Normal,762                description: collection_description,763                decimal_points: decimal_points,764                token_prefix: token_prefix,765                offchain_schema: Vec::new(),766                schema_version: SchemaVersion::ImageURL,767                sponsorship: SponsorshipState::Disabled,768                variable_on_chain_schema: Vec::new(),769                const_on_chain_schema: Vec::new(),770                limits,771            };772773            // Add new collection to map774            <CollectionById<T>>::insert(next_id, new_collection);775776            // call event777            Self::deposit_event(RawEvent::CollectionCreated(next_id, mode.into(), who.clone()));778779            Ok(())780        }781782        /// **DANGEROUS**: Destroys collection and all NFTs within this collection. Users irrecoverably lose their assets and may lose real money.783        /// 784        /// # Permissions785        /// 786        /// * Collection Owner.787        /// 788        /// # Arguments789        /// 790        /// * collection_id: collection to destroy.791        #[weight = <T as Config>::WeightInfo::destroy_collection()]792        #[transactional]793        pub fn destroy_collection(origin, collection_id: CollectionId) -> DispatchResult {794795            let sender = ensure_signed(origin)?;796            let collection = Self::get_collection(collection_id)?;797            Self::check_owner_permissions(&collection, sender)?;798            if !collection.limits.owner_can_destroy {799                fail!(Error::<T>::NoPermission);800            }801802            <AddressTokens<T>>::remove_prefix(collection_id);803            <Allowances<T>>::remove_prefix(collection_id);804            <Balance<T>>::remove_prefix(collection_id);805            <ItemListIndex>::remove(collection_id);806            <AdminList<T>>::remove(collection_id);807            <CollectionById<T>>::remove(collection_id);808            <WhiteList<T>>::remove_prefix(collection_id);809810            <NftItemList<T>>::remove_prefix(collection_id);811            <FungibleItemList<T>>::remove_prefix(collection_id);812            <ReFungibleItemList<T>>::remove_prefix(collection_id);813814            <NftTransferBasket<T>>::remove_prefix(collection_id);815            <FungibleTransferBasket<T>>::remove_prefix(collection_id);816            <ReFungibleTransferBasket<T>>::remove_prefix(collection_id);817818            <VariableMetaDataBasket<T>>::remove_prefix(collection_id);819820            DestroyedCollectionCount::put(DestroyedCollectionCount::get()821                .checked_add(1)822                .ok_or(Error::<T>::NumOverflow)?);823824            Ok(())825        }826827        /// Add an address to white list.828        /// 829        /// # Permissions830        /// 831        /// * Collection Owner832        /// * Collection Admin833        /// 834        /// # Arguments835        /// 836        /// * collection_id.837        /// 838        /// * address.839        #[weight = <T as Config>::WeightInfo::add_to_white_list()]840        #[transactional]841        pub fn add_to_white_list(origin, collection_id: CollectionId, address: T::AccountId) -> DispatchResult{842843            let sender = ensure_signed(origin)?;844            let collection = Self::get_collection(collection_id)?;845            Self::check_owner_or_admin_permissions(&collection, sender)?;846847            <WhiteList<T>>::insert(collection_id, address, true);848            849            Ok(())850        }851852        /// Remove an address from white list.853        /// 854        /// # Permissions855        /// 856        /// * Collection Owner857        /// * Collection Admin858        /// 859        /// # Arguments860        /// 861        /// * collection_id.862        /// 863        /// * address.864        #[weight = <T as Config>::WeightInfo::remove_from_white_list()]865        #[transactional]866        pub fn remove_from_white_list(origin, collection_id: CollectionId, address: T::AccountId) -> DispatchResult{867868            let sender = ensure_signed(origin)?;869            let collection = Self::get_collection(collection_id)?;870            Self::check_owner_or_admin_permissions(&collection, sender)?;871872            <WhiteList<T>>::remove(collection_id, address);873874            Ok(())875        }876877        /// Toggle between normal and white list access for the methods with access for `Anyone`.878        /// 879        /// # Permissions880        /// 881        /// * Collection Owner.882        /// 883        /// # Arguments884        /// 885        /// * collection_id.886        /// 887        /// * mode: [AccessMode]888        #[weight = <T as Config>::WeightInfo::set_public_access_mode()]889        #[transactional]890        pub fn set_public_access_mode(origin, collection_id: CollectionId, mode: AccessMode) -> DispatchResult891        {892            let sender = ensure_signed(origin)?;893894            let mut target_collection = Self::get_collection(collection_id)?;895            Self::check_owner_permissions(&target_collection, sender)?;896            target_collection.access = mode;897            Self::save_collection(target_collection);898899            Ok(())900        }901902        /// Allows Anyone to create tokens if:903        /// * White List is enabled, and904        /// * Address is added to white list, and905        /// * This method was called with True parameter906        /// 907        /// # Permissions908        /// * Collection Owner909        ///910        /// # Arguments911        /// 912        /// * collection_id.913        /// 914        /// * mint_permission: Boolean parameter. If True, allows minting to Anyone with conditions above.915        #[weight = <T as Config>::WeightInfo::set_mint_permission()]916        #[transactional]917        pub fn set_mint_permission(origin, collection_id: CollectionId, mint_permission: bool) -> DispatchResult918        {919            let sender = ensure_signed(origin)?;920921            let mut target_collection = Self::get_collection(collection_id)?;922            Self::check_owner_permissions(&target_collection, sender)?;923            target_collection.mint_mode = mint_permission;924            Self::save_collection(target_collection);925926            Ok(())927        }928929        /// Change the owner of the collection.930        /// 931        /// # Permissions932        /// 933        /// * Collection Owner.934        /// 935        /// # Arguments936        /// 937        /// * collection_id.938        /// 939        /// * new_owner.940        #[weight = <T as Config>::WeightInfo::change_collection_owner()]941        #[transactional]942        pub fn change_collection_owner(origin, collection_id: CollectionId, new_owner: T::AccountId) -> DispatchResult {943944            let sender = ensure_signed(origin)?;945            let mut target_collection = Self::get_collection(collection_id)?;946            Self::check_owner_permissions(&target_collection, sender)?;947            target_collection.owner = new_owner;948            Self::save_collection(target_collection);949950            Ok(())951        }952953        /// Adds an admin of the Collection.954        /// 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. 955        /// 956        /// # Permissions957        /// 958        /// * Collection Owner.959        /// * Collection Admin.960        /// 961        /// # Arguments962        /// 963        /// * collection_id: ID of the Collection to add admin for.964        /// 965        /// * new_admin_id: Address of new admin to add.966        #[weight = <T as Config>::WeightInfo::add_collection_admin()]967        #[transactional]968        pub fn add_collection_admin(origin, collection_id: CollectionId, new_admin_id: T::AccountId) -> DispatchResult {969970            let sender = ensure_signed(origin)?;971            let collection = Self::get_collection(collection_id)?;972            Self::check_owner_or_admin_permissions(&collection, sender)?;973            let mut admin_arr = <AdminList<T>>::get(collection_id);974975            match admin_arr.binary_search(&new_admin_id) {976                Ok(_) => {},977                Err(idx) => {978                    let limits = ChainLimit::get();979                    ensure!(admin_arr.len() < limits.collections_admins_limit as usize, Error::<T>::CollectionAdminsLimitExceeded);980                    admin_arr.insert(idx, new_admin_id);981                    <AdminList<T>>::insert(collection_id, admin_arr);982                }983            }984            Ok(())985        }986987        /// 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.988        ///989        /// # Permissions990        /// 991        /// * Collection Owner.992        /// * Collection Admin.993        /// 994        /// # Arguments995        /// 996        /// * collection_id: ID of the Collection to remove admin for.997        /// 998        /// * account_id: Address of admin to remove.999        #[weight = <T as Config>::WeightInfo::remove_collection_admin()]1000        #[transactional]1001        pub fn remove_collection_admin(origin, collection_id: CollectionId, account_id: T::AccountId) -> DispatchResult {10021003            let sender = ensure_signed(origin)?;1004            let collection = Self::get_collection(collection_id)?;1005            Self::check_owner_or_admin_permissions(&collection, sender)?;1006            let mut admin_arr = <AdminList<T>>::get(collection_id);10071008            match admin_arr.binary_search(&account_id) {1009                Ok(idx) => {1010                    admin_arr.remove(idx);1011                    <AdminList<T>>::insert(collection_id, admin_arr);1012                },1013                Err(_) => {}1014            }1015            Ok(())1016        }10171018        /// # Permissions1019        /// 1020        /// * Collection Owner1021        /// 1022        /// # Arguments1023        /// 1024        /// * collection_id.1025        /// 1026        /// * new_sponsor.1027        #[weight = <T as Config>::WeightInfo::set_collection_sponsor()]1028        #[transactional]1029        pub fn set_collection_sponsor(origin, collection_id: CollectionId, new_sponsor: T::AccountId) -> DispatchResult {10301031            let sender = ensure_signed(origin)?;1032            let mut target_collection = Self::get_collection(collection_id)?;1033            Self::check_owner_permissions(&target_collection, sender)?;10341035            target_collection.sponsorship = SponsorshipState::Unconfirmed(new_sponsor);1036            Self::save_collection(target_collection);10371038            Ok(())1039        }10401041        /// # Permissions1042        /// 1043        /// * Sponsor.1044        /// 1045        /// # Arguments1046        /// 1047        /// * collection_id.1048        #[weight = <T as Config>::WeightInfo::confirm_sponsorship()]1049        #[transactional]1050        pub fn confirm_sponsorship(origin, collection_id: CollectionId) -> DispatchResult {10511052            let sender = ensure_signed(origin)?;10531054            let mut target_collection = Self::get_collection(collection_id)?;1055            ensure!(1056                target_collection.sponsorship.pending_sponsor() == Some(&sender),1057                Error::<T>::ConfirmUnsetSponsorFail1058            );10591060            target_collection.sponsorship = SponsorshipState::Confirmed(sender);1061            Self::save_collection(target_collection);10621063            Ok(())1064        }10651066        /// Switch back to pay-per-own-transaction model.1067        ///1068        /// # Permissions1069        ///1070        /// * Collection owner.1071        /// 1072        /// # Arguments1073        /// 1074        /// * collection_id.1075        #[weight = <T as Config>::WeightInfo::remove_collection_sponsor()]1076        #[transactional]1077        pub fn remove_collection_sponsor(origin, collection_id: CollectionId) -> DispatchResult {10781079            let sender = ensure_signed(origin)?;10801081            let mut target_collection = Self::get_collection(collection_id)?;1082            Self::check_owner_permissions(&target_collection, sender)?;10831084            target_collection.sponsorship = SponsorshipState::Disabled;1085            Self::save_collection(target_collection);10861087            Ok(())1088        }10891090        /// This method creates a concrete instance of NFT Collection created with CreateCollection method.1091        /// 1092        /// # Permissions1093        /// 1094        /// * Collection Owner.1095        /// * Collection Admin.1096        /// * Anyone if1097        ///     * White List is enabled, and1098        ///     * Address is added to white list, and1099        ///     * MintPermission is enabled (see SetMintPermission method)1100        /// 1101        /// # Arguments1102        /// 1103        /// * collection_id: ID of the collection.1104        /// 1105        /// * owner: Address, initial owner of the NFT.1106        ///1107        /// * data: Token data to store on chain.1108        // #[weight =1109        // (130_000_000 as Weight)1110        // .saturating_add((2135 as Weight).saturating_mul((properties.len() as u64) as Weight))1111        // .saturating_add(RocksDbWeight::get().reads(10 as Weight))1112        // .saturating_add(RocksDbWeight::get().writes(8 as Weight))]11131114        #[weight = <T as Config>::WeightInfo::create_item(data.len())]1115        #[transactional]1116        pub fn create_item(origin, collection_id: CollectionId, owner: T::AccountId, data: CreateItemData) -> DispatchResult {11171118            let sender = ensure_signed(origin)?;11191120            let target_collection = Self::get_collection(collection_id)?;11211122            Self::can_create_items_in_collection(&target_collection, &sender, &owner, 1)?;1123            Self::validate_create_item_args(&target_collection, &data)?;1124            Self::create_item_no_validation(&target_collection, owner, data)?;11251126            Ok(())1127        }11281129        /// This method creates multiple items in a collection created with CreateCollection method.1130        /// 1131        /// # Permissions1132        /// 1133        /// * Collection Owner.1134        /// * Collection Admin.1135        /// * Anyone if1136        ///     * White List is enabled, and1137        ///     * Address is added to white list, and1138        ///     * MintPermission is enabled (see SetMintPermission method)1139        /// 1140        /// # Arguments1141        /// 1142        /// * collection_id: ID of the collection.1143        /// 1144        /// * itemsData: Array items properties. Each property is an array of bytes itself, see [create_item].1145        /// 1146        /// * owner: Address, initial owner of the NFT.1147        #[weight = <T as Config>::WeightInfo::create_item(items_data.into_iter()1148                               .map(|data| { data.len() })1149                               .sum())]1150        #[transactional]1151        pub fn create_multiple_items(origin, collection_id: CollectionId, owner: T::AccountId, items_data: Vec<CreateItemData>) -> DispatchResult {11521153            ensure!(items_data.len() > 0, Error::<T>::EmptyArgument);1154            let sender = ensure_signed(origin)?;11551156            let target_collection = Self::get_collection(collection_id)?;11571158            Self::can_create_items_in_collection(&target_collection, &sender, &owner, items_data.len() as u32)?;11591160            for data in &items_data {1161                Self::validate_create_item_args(&target_collection, data)?;1162            }1163            for data in &items_data {1164                Self::create_item_no_validation(&target_collection, owner.clone(), data.clone())?;1165            }11661167            Ok(())1168        }11691170        /// Destroys a concrete instance of NFT.1171        /// 1172        /// # Permissions1173        /// 1174        /// * Collection Owner.1175        /// * Collection Admin.1176        /// * Current NFT Owner.1177        /// 1178        /// # Arguments1179        /// 1180        /// * collection_id: ID of the collection.1181        /// 1182        /// * item_id: ID of NFT to burn.1183        #[weight = <T as Config>::WeightInfo::burn_item()]1184        #[transactional]1185        pub fn burn_item(origin, collection_id: CollectionId, item_id: TokenId, value: u128) -> DispatchResult {11861187            let sender = ensure_signed(origin)?;11881189            // Transfer permissions check1190            let target_collection = Self::get_collection(collection_id)?;1191            ensure!(1192                Self::is_item_owner(sender.clone(), &target_collection, item_id) ||1193                (1194                    target_collection.limits.owner_can_transfer &&1195                    Self::is_owner_or_admin_permissions(&target_collection, sender.clone())1196                ),1197                Error::<T>::NoPermission1198            );11991200            if target_collection.access == AccessMode::WhiteList {1201                Self::check_white_list(&target_collection, &sender)?;1202            }12031204            match target_collection.mode1205            {1206                CollectionMode::NFT => Self::burn_nft_item(&target_collection, item_id)?,1207                CollectionMode::Fungible(_)  => Self::burn_fungible_item(&sender, &target_collection, value)?,1208                CollectionMode::ReFungible  => Self::burn_refungible_item(&target_collection, item_id, &sender)?,1209                _ => ()1210            };12111212            // call event1213            Self::deposit_event(RawEvent::ItemDestroyed(target_collection.id, item_id));12141215            Ok(())1216        }12171218        /// Change ownership of the token.1219        /// 1220        /// # Permissions1221        /// 1222        /// * Collection Owner1223        /// * Collection Admin1224        /// * Current NFT owner1225        ///1226        /// # Arguments1227        /// 1228        /// * recipient: Address of token recipient.1229        /// 1230        /// * collection_id.1231        /// 1232        /// * item_id: ID of the item1233        ///     * Non-Fungible Mode: Required.1234        ///     * Fungible Mode: Ignored.1235        ///     * Re-Fungible Mode: Required.1236        /// 1237        /// * value: Amount to transfer.1238        ///     * Non-Fungible Mode: Ignored1239        ///     * Fungible Mode: Must specify transferred amount1240        ///     * Re-Fungible Mode: Must specify transferred portion (between 0 and 1)1241        #[weight = <T as Config>::WeightInfo::transfer()]1242        #[transactional]1243        pub fn transfer(origin, recipient: T::AccountId, collection_id: CollectionId, item_id: TokenId, value: u128) -> DispatchResult {1244            let sender = ensure_signed(origin)?;1245            let collection = Self::get_collection(collection_id)?;12461247            Self::transfer_internal(sender, recipient, &collection, item_id, value)1248        }12491250        /// Set, change, or remove approved address to transfer the ownership of the NFT.1251        /// 1252        /// # Permissions1253        /// 1254        /// * Collection Owner1255        /// * Collection Admin1256        /// * Current NFT owner1257        /// 1258        /// # Arguments1259        /// 1260        /// * approved: Address that is approved to transfer this NFT or zero (if needed to remove approval).1261        /// 1262        /// * collection_id.1263        /// 1264        /// * item_id: ID of the item.1265        #[weight = <T as Config>::WeightInfo::approve()]1266        #[transactional]1267        pub fn approve(origin, spender: T::AccountId, collection_id: CollectionId, item_id: TokenId, amount: u128) -> DispatchResult {12681269            let sender = ensure_signed(origin)?;1270            let target_collection = Self::get_collection(collection_id)?;12711272            Self::token_exists(&target_collection, item_id)?;12731274            // Transfer permissions check1275            let bypasses_limits = target_collection.limits.owner_can_transfer &&1276                Self::is_owner_or_admin_permissions(1277                    &target_collection,1278                    sender.clone(),1279                );12801281            let allowance_limit = if bypasses_limits {1282                None1283            } else if let Some(amount) = Self::owned_amount(1284                sender.clone(),1285                &target_collection,1286                item_id,1287            ) {1288                Some(amount)1289            } else {1290                fail!(Error::<T>::NoPermission);1291            };12921293            if target_collection.access == AccessMode::WhiteList {1294                Self::check_white_list(&target_collection, &sender)?;1295                Self::check_white_list(&target_collection, &spender)?;1296            }12971298            let allowance: u128 = amount1299                .checked_add(<Allowances<T>>::get(collection_id, (item_id, &sender, &spender)))1300                .ok_or(Error::<T>::NumOverflow)?;1301            if let Some(limit) = allowance_limit {1302                ensure!(limit >= allowance, Error::<T>::TokenValueTooLow);1303            }1304            <Allowances<T>>::insert(collection_id, (item_id, sender.clone(), spender.clone()), allowance);13051306            Self::deposit_event(RawEvent::Approved(target_collection.id, item_id, sender, spender, allowance));1307            Ok(())1308        }1309        1310        /// 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.1311        /// 1312        /// # Permissions1313        /// * Collection Owner1314        /// * Collection Admin1315        /// * Current NFT owner1316        /// * Address approved by current NFT owner1317        /// 1318        /// # Arguments1319        /// 1320        /// * from: Address that owns token.1321        /// 1322        /// * recipient: Address of token recipient.1323        /// 1324        /// * collection_id.1325        /// 1326        /// * item_id: ID of the item.1327        /// 1328        /// * value: Amount to transfer.1329        #[weight = <T as Config>::WeightInfo::transfer_from()]1330        #[transactional]1331        pub fn transfer_from(origin, from: T::AccountId, recipient: T::AccountId, collection_id: CollectionId, item_id: TokenId, value: u128 ) -> DispatchResult {13321333            let sender = ensure_signed(origin)?;1334            let target_collection = Self::get_collection(collection_id)?;13351336            // Check approval1337            let approval: u128 = <Allowances<T>>::get(collection_id, (item_id, &from, &sender));13381339            // Limits check1340            Self::is_correct_transfer(&target_collection, &recipient)?;13411342            // Transfer permissions check         1343            ensure!(1344                approval >= value || 1345                (1346                    target_collection.limits.owner_can_transfer &&1347                    Self::is_owner_or_admin_permissions(&target_collection, sender.clone())1348                ),1349                Error::<T>::NoPermission1350            );13511352            if target_collection.access == AccessMode::WhiteList {1353                Self::check_white_list(&target_collection, &sender)?;1354                Self::check_white_list(&target_collection, &recipient)?;1355            }13561357            // Reduce approval by transferred amount or remove if remaining approval drops to 01358            if approval.saturating_sub(value) > 0 {1359                <Allowances<T>>::insert(collection_id, (item_id, &from, &sender), approval - value);1360            }1361            else {1362                <Allowances<T>>::remove(collection_id, (item_id, &from, &sender));1363            }13641365            match target_collection.mode1366            {1367                CollectionMode::NFT => Self::transfer_nft(&target_collection, item_id, from.clone(), recipient.clone())?,1368                CollectionMode::Fungible(_)  => Self::transfer_fungible(&target_collection, value, &from, &recipient)?,1369                CollectionMode::ReFungible  => Self::transfer_refungible(&target_collection, item_id, value, from.clone(), recipient.clone())?,1370                _ => ()1371            };13721373            Self::deposit_event(RawEvent::Transfer(target_collection.id, item_id, from, recipient, value));1374            Ok(())1375        }13761377        // #[weight = 0]1378        // pub fn safe_transfer_from(origin, collection_id: CollectionId, item_id: TokenId, new_owner: T::AccountId) -> DispatchResult {13791380        //     // let no_perm_mes = "You do not have permissions to modify this collection";1381        //     // ensure!(<ApprovedList<T>>::contains_key((collection_id, item_id)), no_perm_mes);1382        //     // let list_itm = <ApprovedList<T>>::get((collection_id, item_id));1383        //     // ensure!(list_itm.contains(&new_owner.clone()), no_perm_mes);13841385        //     // // on_nft_received  call13861387        //     // Self::transfer(origin, collection_id, item_id, new_owner)?;13881389        //     Ok(())1390        // }13911392        /// Set off-chain data schema.1393        /// 1394        /// # Permissions1395        /// 1396        /// * Collection Owner1397        /// * Collection Admin1398        /// 1399        /// # Arguments1400        /// 1401        /// * collection_id.1402        /// 1403        /// * schema: String representing the offchain data schema.1404        #[weight = <T as Config>::WeightInfo::set_variable_meta_data()]1405        #[transactional]1406        pub fn set_variable_meta_data (1407            origin,1408            collection_id: CollectionId,1409            item_id: TokenId,1410            data: Vec<u8>1411        ) -> DispatchResult {1412            let sender = ensure_signed(origin)?;1413            1414            let target_collection = Self::get_collection(collection_id)?;1415            Self::token_exists(&target_collection, item_id)?;14161417            ensure!(ChainLimit::get().custom_data_limit >= data.len() as u32, Error::<T>::TokenVariableDataLimitExceeded);14181419            // Modify permissions check1420            ensure!(Self::is_item_owner(sender.clone(), &target_collection, item_id) ||1421                Self::is_owner_or_admin_permissions(&target_collection, sender.clone()),1422                Error::<T>::NoPermission);14231424            match target_collection.mode1425            {1426                CollectionMode::NFT => Self::set_nft_variable_data(&target_collection, item_id, data)?,1427                CollectionMode::ReFungible  => Self::set_re_fungible_variable_data(&target_collection, item_id, data)?,1428                CollectionMode::Fungible(_) => fail!(Error::<T>::CantStoreMetadataInFungibleTokens),1429                _ => fail!(Error::<T>::UnexpectedCollectionType)1430            };14311432            Ok(())1433        }1434 1435        /// Set schema standard1436        /// ImageURL1437        /// Unique1438        /// 1439        /// # Permissions1440        /// 1441        /// * Collection Owner1442        /// * Collection Admin1443        /// 1444        /// # Arguments1445        /// 1446        /// * collection_id.1447        /// 1448        /// * schema: SchemaVersion: enum1449        #[weight = <T as Config>::WeightInfo::set_schema_version()]1450        #[transactional]1451        pub fn set_schema_version(1452            origin,1453            collection_id: CollectionId,1454            version: SchemaVersion1455        ) -> DispatchResult {1456            let sender = ensure_signed(origin)?;1457            let mut target_collection = Self::get_collection(collection_id)?;1458            Self::check_owner_or_admin_permissions(&target_collection, sender.clone())?;1459            target_collection.schema_version = version;1460            Self::save_collection(target_collection);14611462            Ok(())1463        }14641465        /// Set off-chain data schema.1466        /// 1467        /// # Permissions1468        /// 1469        /// * Collection Owner1470        /// * Collection Admin1471        /// 1472        /// # Arguments1473        /// 1474        /// * collection_id.1475        /// 1476        /// * schema: String representing the offchain data schema.1477        #[weight = <T as Config>::WeightInfo::set_offchain_schema()]1478        #[transactional]1479        pub fn set_offchain_schema(1480            origin,1481            collection_id: CollectionId,1482            schema: Vec<u8>1483        ) -> DispatchResult {1484            let sender = ensure_signed(origin)?;1485            let mut target_collection = Self::get_collection(collection_id)?;1486            Self::check_owner_or_admin_permissions(&target_collection, sender.clone())?;14871488            // check schema limit1489            ensure!(schema.len() as u32 <= ChainLimit::get().offchain_schema_limit, "");14901491            target_collection.offchain_schema = schema;1492            Self::save_collection(target_collection);14931494            Ok(())1495        }14961497        /// Set const on-chain data schema.1498        /// 1499        /// # Permissions1500        /// 1501        /// * Collection Owner1502        /// * Collection Admin1503        /// 1504        /// # Arguments1505        /// 1506        /// * collection_id.1507        /// 1508        /// * schema: String representing the const on-chain data schema.1509        #[weight = <T as Config>::WeightInfo::set_const_on_chain_schema()]1510        #[transactional]1511        pub fn set_const_on_chain_schema (1512            origin,1513            collection_id: CollectionId,1514            schema: Vec<u8>1515        ) -> DispatchResult {1516            let sender = ensure_signed(origin)?;1517            let mut target_collection = Self::get_collection(collection_id)?;1518            Self::check_owner_or_admin_permissions(&target_collection, sender.clone())?;15191520            // check schema limit1521            ensure!(schema.len() as u32 <= ChainLimit::get().const_on_chain_schema_limit, "");15221523            target_collection.const_on_chain_schema = schema;1524            Self::save_collection(target_collection);15251526            Ok(())1527        }15281529        /// Set variable on-chain data schema.1530        /// 1531        /// # Permissions1532        /// 1533        /// * Collection Owner1534        /// * Collection Admin1535        /// 1536        /// # Arguments1537        /// 1538        /// * collection_id.1539        /// 1540        /// * schema: String representing the variable on-chain data schema.1541        #[weight = <T as Config>::WeightInfo::set_const_on_chain_schema()]1542        #[transactional]1543        pub fn set_variable_on_chain_schema (1544            origin,1545            collection_id: CollectionId,1546            schema: Vec<u8>1547        ) -> DispatchResult {1548            let sender = ensure_signed(origin)?;1549            let mut target_collection = Self::get_collection(collection_id)?;1550            Self::check_owner_or_admin_permissions(&target_collection, sender.clone())?;15511552            // check schema limit1553            ensure!(schema.len() as u32 <= ChainLimit::get().variable_on_chain_schema_limit, "");15541555            target_collection.variable_on_chain_schema = schema;1556            Self::save_collection(target_collection);15571558            Ok(())1559        }15601561        // Sudo permissions function1562        #[weight = <T as Config>::WeightInfo::set_chain_limits()]1563        #[transactional]1564        pub fn set_chain_limits(1565            origin,1566            limits: ChainLimits1567        ) -> DispatchResult {15681569            #[cfg(not(feature = "runtime-benchmarks"))]1570            ensure_root(origin)?;15711572            <ChainLimit>::put(limits);1573            Ok(())1574        }15751576        /// Enable smart contract self-sponsoring.1577        /// 1578        /// # Permissions1579        /// 1580        /// * Contract Owner1581        /// 1582        /// # Arguments1583        /// 1584        /// * contract address1585        /// * enable flag1586        /// 1587        #[weight = <T as Config>::WeightInfo::enable_contract_sponsoring()]1588        #[transactional]1589        pub fn enable_contract_sponsoring(1590            origin,1591            contract_address: T::AccountId,1592            enable: bool1593        ) -> DispatchResult {15941595            let sender = ensure_signed(origin)?;15961597            #[cfg(feature = "runtime-benchmarks")]1598            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());15991600            Self::ensure_contract_owned(sender, &contract_address)?;16011602            <ContractSelfSponsoring<T>>::insert(contract_address, enable);1603            Ok(())1604        }16051606        /// Set the rate limit for contract sponsoring to specified number of blocks.1607        /// 1608        /// If not set (has the default value of 0 blocks), the sponsoring will be disabled. 1609        /// If set to the number B (for blocks), the transactions will be sponsored with a rate 1610        /// limit of B, i.e. fees for every transaction sent to this smart contract will be paid 1611        /// from contract endowment if there are at least B blocks between such transactions. 1612        /// Nonetheless, if transactions are sent more frequently, the fees are paid by the sender.1613        /// 1614        /// # Permissions1615        /// 1616        /// * Contract Owner1617        /// 1618        /// # Arguments1619        /// 1620        /// -`contract_address`: Address of the contract to sponsor1621        /// -`rate_limit`: Number of blocks to wait until the next sponsored transaction is allowed1622        /// 1623        #[weight = <T as Config>::WeightInfo::set_contract_sponsoring_rate_limit()]1624        #[transactional]1625        pub fn set_contract_sponsoring_rate_limit(1626            origin,1627            contract_address: T::AccountId,1628            rate_limit: T::BlockNumber1629        ) -> DispatchResult {1630            let sender = ensure_signed(origin)?;16311632            #[cfg(feature = "runtime-benchmarks")]1633            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());16341635            Self::ensure_contract_owned(sender, &contract_address)?;1636            <ContractSponsoringRateLimit<T>>::insert(contract_address, rate_limit);1637            Ok(())1638        }16391640        /// Enable the white list for a contract. Only addresses added to the white list with addToContractWhiteList will be able to call this smart contract.1641        /// 1642        /// # Permissions1643        /// 1644        /// * Address that deployed smart contract.1645        /// 1646        /// # Arguments1647        /// 1648        /// -`contract_address`: Address of the contract.1649        /// 1650        /// - `enable`: .  1651        #[weight = <T as Config>::WeightInfo::toggle_contract_white_list()]1652        #[transactional]1653        pub fn toggle_contract_white_list(1654            origin,1655            contract_address: T::AccountId,1656            enable: bool1657        ) -> DispatchResult {1658            let sender = ensure_signed(origin)?;16591660            #[cfg(feature = "runtime-benchmarks")]1661            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());16621663            Self::ensure_contract_owned(sender, &contract_address)?;1664            if enable {1665                <ContractWhiteListEnabled<T>>::insert(contract_address, true);1666            } else {1667                <ContractWhiteListEnabled<T>>::remove(contract_address);1668            }1669            Ok(())1670        }1671        1672        /// Add an address to smart contract white list.1673        /// 1674        /// # Permissions1675        /// 1676        /// * Address that deployed smart contract.1677        /// 1678        /// # Arguments1679        /// 1680        /// -`contract_address`: Address of the contract.1681        ///1682        /// -`account_address`: Address to add.1683        #[weight = <T as Config>::WeightInfo::add_to_contract_white_list()]1684        #[transactional]1685        pub fn add_to_contract_white_list(1686            origin,1687            contract_address: T::AccountId,1688            account_address: T::AccountId1689        ) -> DispatchResult {1690            let sender = ensure_signed(origin)?;16911692            #[cfg(feature = "runtime-benchmarks")]1693            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());1694            1695            Self::ensure_contract_owned(sender, &contract_address)?;      1696            <ContractWhiteList<T>>::insert(contract_address, account_address, true);1697            Ok(())1698        }16991700        /// Remove an address from smart contract white list.1701        /// 1702        /// # Permissions1703        /// 1704        /// * Address that deployed smart contract.1705        /// 1706        /// # Arguments1707        /// 1708        /// -`contract_address`: Address of the contract.1709        ///1710        /// -`account_address`: Address to remove.1711        #[weight = <T as Config>::WeightInfo::remove_from_contract_white_list()]1712        #[transactional]1713        pub fn remove_from_contract_white_list(1714            origin,1715            contract_address: T::AccountId,1716            account_address: T::AccountId1717        ) -> DispatchResult {1718            let sender = ensure_signed(origin)?;17191720            #[cfg(feature = "runtime-benchmarks")]1721            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());17221723            Self::ensure_contract_owned(sender, &contract_address)?;1724            <ContractWhiteList<T>>::remove(contract_address, account_address);1725            Ok(())1726        }17271728        #[weight = <T as Config>::WeightInfo::set_collection_limits()]1729        #[transactional]1730        pub fn set_collection_limits(1731            origin,1732            collection_id: u32,1733            new_limits: CollectionLimits<T::BlockNumber>,1734        ) -> DispatchResult {1735            let sender = ensure_signed(origin)?;1736            let mut target_collection = Self::get_collection(collection_id)?;1737            Self::check_owner_permissions(&target_collection, sender.clone())?;1738            let old_limits = &target_collection.limits;1739            let chain_limits = ChainLimit::get();17401741            // collection bounds1742            ensure!(new_limits.sponsor_transfer_timeout <= MAX_SPONSOR_TIMEOUT &&1743                new_limits.account_token_ownership_limit <= MAX_TOKEN_OWNERSHIP && 1744                new_limits.sponsored_data_size <= chain_limits.custom_data_limit,1745                Error::<T>::CollectionLimitBoundsExceeded);17461747            // token_limit   check  prev1748            ensure!(old_limits.token_limit >= new_limits.token_limit, Error::<T>::CollectionTokenLimitExceeded);1749            ensure!(new_limits.token_limit > 0, Error::<T>::CollectionTokenLimitExceeded);17501751            ensure!(1752                (old_limits.owner_can_transfer || !new_limits.owner_can_transfer) &&1753                (old_limits.owner_can_destroy || !new_limits.owner_can_destroy),1754                Error::<T>::OwnerPermissionsCantBeReverted,1755            );17561757            target_collection.limits = new_limits;1758            Self::save_collection(target_collection);17591760            Ok(())1761        } 1762    }1763}17641765impl<T: Config> Module<T> {17661767    pub fn transfer_internal(sender: T::AccountId, recipient: T::AccountId, target_collection: &CollectionHandle<T>, item_id: TokenId, value: u128) -> DispatchResult {1768        // Limits check1769        Self::is_correct_transfer(target_collection, &recipient)?;17701771        // Transfer permissions check1772        ensure!(Self::is_item_owner(sender.clone(), target_collection, item_id) ||1773            Self::is_owner_or_admin_permissions(target_collection, sender.clone()),1774            Error::<T>::NoPermission);17751776        if target_collection.access == AccessMode::WhiteList {1777            Self::check_white_list(target_collection, &sender)?;1778            Self::check_white_list(target_collection, &recipient)?;1779        }17801781        match target_collection.mode1782        {1783            CollectionMode::NFT => Self::transfer_nft(target_collection, item_id, sender.clone(), recipient.clone())?,1784            CollectionMode::Fungible(_)  => Self::transfer_fungible(target_collection, value, &sender, &recipient)?,1785            CollectionMode::ReFungible  => Self::transfer_refungible(target_collection, item_id, value, sender.clone(), recipient.clone())?,1786            _ => ()1787        };17881789        Self::deposit_event(RawEvent::Transfer(target_collection.id, item_id, sender, recipient, value));17901791        Ok(())1792    }179317941795    fn is_correct_transfer(collection: &CollectionHandle<T>, recipient: &T::AccountId) -> DispatchResult {1796        let collection_id = collection.id;17971798        // check token limit and account token limit1799        let account_items: u32 = <AddressTokens<T>>::get(collection_id, recipient).len() as u32;1800        ensure!(collection.limits.account_token_ownership_limit > account_items,  Error::<T>::AccountTokenLimitExceeded);1801        1802        Ok(())1803    }18041805    fn can_create_items_in_collection(collection: &CollectionHandle<T>, sender: &T::AccountId, owner: &T::AccountId, amount: u32) -> DispatchResult {1806        let collection_id = collection.id;18071808        // check token limit and account token limit1809        let total_items: u32 = ItemListIndex::get(collection_id)1810            .checked_add(amount)1811            .ok_or(Error::<T>::CollectionTokenLimitExceeded)?;1812        let account_items: u32 = (<AddressTokens<T>>::get(collection_id, owner).len() as u32)1813            .checked_add(amount)1814            .ok_or(Error::<T>::AccountTokenLimitExceeded)?;1815        ensure!(collection.limits.token_limit >= total_items,  Error::<T>::CollectionTokenLimitExceeded);1816        ensure!(collection.limits.account_token_ownership_limit >= account_items,  Error::<T>::AccountTokenLimitExceeded);18171818        if !Self::is_owner_or_admin_permissions(collection, sender.clone()) {1819            ensure!(collection.mint_mode == true, Error::<T>::PublicMintingNotAllowed);1820            Self::check_white_list(collection, owner)?;1821            Self::check_white_list(collection, sender)?;1822        }18231824        Ok(())1825    }18261827    fn validate_create_item_args(target_collection: &CollectionHandle<T>, data: &CreateItemData) -> DispatchResult {1828        match target_collection.mode1829        {1830            CollectionMode::NFT => {1831                if let CreateItemData::NFT(data) = data {1832                    // check sizes1833                    ensure!(ChainLimit::get().custom_data_limit >= data.const_data.len() as u32, Error::<T>::TokenConstDataLimitExceeded);1834                    ensure!(ChainLimit::get().custom_data_limit >= data.variable_data.len() as u32, Error::<T>::TokenVariableDataLimitExceeded);1835                } else {1836                    fail!(Error::<T>::NotNftDataUsedToMintNftCollectionToken);1837                }1838            },1839            CollectionMode::Fungible(_) => {1840                if let CreateItemData::Fungible(_) = data {1841                } else {1842                    fail!(Error::<T>::NotFungibleDataUsedToMintFungibleCollectionToken);1843                }1844            },1845            CollectionMode::ReFungible => {1846                if let CreateItemData::ReFungible(data) = data {18471848                    // check sizes1849                    ensure!(ChainLimit::get().custom_data_limit >= data.const_data.len() as u32, Error::<T>::TokenConstDataLimitExceeded);1850                    ensure!(ChainLimit::get().custom_data_limit >= data.variable_data.len() as u32, Error::<T>::TokenVariableDataLimitExceeded);18511852                    // Check refungibility limits1853                    ensure!(data.pieces <= MAX_REFUNGIBLE_PIECES, Error::<T>::WrongRefungiblePieces);1854                    ensure!(data.pieces > 0, Error::<T>::WrongRefungiblePieces);1855                } else {1856                    fail!(Error::<T>::NotReFungibleDataUsedToMintReFungibleCollectionToken);1857                }1858            },1859            _ => { fail!(Error::<T>::UnexpectedCollectionType); }1860        };18611862        Ok(())1863    }18641865    fn create_item_no_validation(collection: &CollectionHandle<T>, owner: T::AccountId, data: CreateItemData) -> DispatchResult {1866        match data1867        {1868            CreateItemData::NFT(data) => {1869                let item = NftItemType {1870                    owner: owner.clone(),1871                    const_data: data.const_data,1872                    variable_data: data.variable_data1873                };18741875                Self::add_nft_item(collection, item)?;1876            },1877            CreateItemData::Fungible(data) => {1878                Self::add_fungible_item(collection, &owner, data.value)?;1879            },1880            CreateItemData::ReFungible(data) => {1881                let mut owner_list = Vec::new();1882                owner_list.push(Ownership {owner: owner.clone(), fraction: data.pieces});18831884                let item = ReFungibleItemType {1885                    owner: owner_list,1886                    const_data: data.const_data,1887                    variable_data: data.variable_data1888                };18891890                Self::add_refungible_item(collection, item)?;1891            }1892        };18931894        Ok(())1895    }18961897    fn add_fungible_item(collection: &CollectionHandle<T>, owner: &T::AccountId, value: u128) -> DispatchResult {1898        let collection_id = collection.id;18991900        // Does new owner already have an account?1901        let balance: u128 = <FungibleItemList<T>>::get(collection_id, owner).value;19021903        // Mint 1904        let item = FungibleItemType {1905            value: balance.checked_add(value).ok_or(Error::<T>::NumOverflow)?,1906        };1907        <FungibleItemList<T>>::insert(collection_id, (*owner).clone(), item);19081909        // Update balance1910        let new_balance = <Balance<T>>::get(collection_id, owner)1911            .checked_add(value)1912            .ok_or(Error::<T>::NumOverflow)?;1913        <Balance<T>>::insert(collection_id, (*owner).clone(), new_balance);19141915        Self::deposit_event(RawEvent::ItemCreated(collection_id, 0, owner.clone()));1916        Ok(())1917    }19181919    fn add_refungible_item(collection: &CollectionHandle<T>, item: ReFungibleItemType<T::AccountId>) -> DispatchResult {1920        let collection_id = collection.id;19211922        let current_index = <ItemListIndex>::get(collection_id)1923            .checked_add(1)1924            .ok_or(Error::<T>::NumOverflow)?;1925        let itemcopy = item.clone();19261927        ensure!(1928            item.owner.len() == 1,1929            Error::<T>::BadCreateRefungibleCall,1930        );1931        let item_owner = item.owner.first().expect("only one owner is defined");19321933        let value = item_owner.fraction;1934        let owner = item_owner.owner.clone();19351936        Self::add_token_index(collection_id, current_index, &owner)?;19371938        <ItemListIndex>::insert(collection_id, current_index);1939        <ReFungibleItemList<T>>::insert(collection_id, current_index, itemcopy);19401941        // Update balance1942        let new_balance = <Balance<T>>::get(collection_id, &owner)1943            .checked_add(value)1944            .ok_or(Error::<T>::NumOverflow)?;1945        <Balance<T>>::insert(collection_id, owner.clone(), new_balance);19461947        Self::deposit_event(RawEvent::ItemCreated(collection_id, current_index, owner));1948        Ok(())1949    }19501951    fn add_nft_item(collection: &CollectionHandle<T>, item: NftItemType<T::AccountId>) -> DispatchResult {1952        let collection_id = collection.id;19531954        let current_index = <ItemListIndex>::get(collection_id)1955            .checked_add(1)1956            .ok_or(Error::<T>::NumOverflow)?;19571958        let item_owner = item.owner.clone();1959        Self::add_token_index(collection_id, current_index, &item.owner)?;19601961        <ItemListIndex>::insert(collection_id, current_index);1962        <NftItemList<T>>::insert(collection_id, current_index, item);19631964        // Update balance1965        let new_balance = <Balance<T>>::get(collection_id, item_owner.clone())1966            .checked_add(1)1967            .ok_or(Error::<T>::NumOverflow)?;1968        <Balance<T>>::insert(collection_id, item_owner.clone(), new_balance);19691970        Self::deposit_event(RawEvent::ItemCreated(collection_id, current_index, item_owner));1971        Ok(())1972    }19731974    fn burn_refungible_item(1975        collection: &CollectionHandle<T>,1976        item_id: TokenId,1977        owner: &T::AccountId,1978    ) -> DispatchResult {1979        let collection_id = collection.id;19801981        let mut token = <ReFungibleItemList<T>>::get(collection_id, item_id)1982            .ok_or(Error::<T>::TokenNotFound)?;1983        let rft_balance = token1984            .owner1985            .iter()1986            .find(|&i| i.owner == *owner)1987            .ok_or(Error::<T>::TokenNotFound)?;1988        Self::remove_token_index(collection_id, item_id, owner)?;19891990        // update balance1991        let new_balance = <Balance<T>>::get(collection_id, rft_balance.owner.clone())1992            .checked_sub(rft_balance.fraction)1993            .ok_or(Error::<T>::NumOverflow)?;1994        <Balance<T>>::insert(collection_id, rft_balance.owner.clone(), new_balance);19951996        // Re-create owners list with sender removed1997        let index = token1998            .owner1999            .iter()2000            .position(|i| i.owner == *owner)2001            .expect("owned item is exists");2002        token.owner.remove(index);2003        let owner_count = token.owner.len();20042005        // Burn the token completely if this was the last (only) owner2006        if owner_count == 0 {2007            <ReFungibleItemList<T>>::remove(collection_id, item_id);2008            <VariableMetaDataBasket<T>>::remove(collection_id, item_id);2009        }2010        else {2011            <ReFungibleItemList<T>>::insert(collection_id, item_id, token);2012        }20132014        Ok(())2015    }20162017    fn burn_nft_item(collection: &CollectionHandle<T>, item_id: TokenId) -> DispatchResult {2018        let collection_id = collection.id;20192020        let item = <NftItemList<T>>::get(collection_id, item_id)2021            .ok_or(Error::<T>::TokenNotFound)?;2022        Self::remove_token_index(collection_id, item_id, &item.owner)?;20232024        // update balance2025        let new_balance = <Balance<T>>::get(collection_id, &item.owner)2026            .checked_sub(1)2027            .ok_or(Error::<T>::NumOverflow)?;2028        <Balance<T>>::insert(collection_id, item.owner.clone(), new_balance);2029        <NftItemList<T>>::remove(collection_id, item_id);2030        <VariableMetaDataBasket<T>>::remove(collection_id, item_id);20312032        Ok(())2033    }20342035    fn burn_fungible_item(owner: &T::AccountId, collection: &CollectionHandle<T>, value: u128) -> DispatchResult {2036        let collection_id = collection.id;20372038        let mut balance = <FungibleItemList<T>>::get(collection_id, owner);2039        ensure!(balance.value >= value, Error::<T>::TokenValueNotEnough);20402041        // update balance2042        let new_balance = <Balance<T>>::get(collection_id, owner)2043            .checked_sub(value)2044            .ok_or(Error::<T>::NumOverflow)?;2045        <Balance<T>>::insert(collection_id, (*owner).clone(), new_balance);20462047        if balance.value - value > 0 {2048            balance.value -= value;2049            <FungibleItemList<T>>::insert(collection_id, (*owner).clone(), balance);2050        }2051        else {2052            <FungibleItemList<T>>::remove(collection_id, owner);2053        }20542055        Ok(())2056    }20572058    pub fn get_collection(collection_id: CollectionId) -> Result<CollectionHandle<T>, sp_runtime::DispatchError> {2059        Ok(<CollectionById<T>>::get(collection_id)2060            .map(|collection| CollectionHandle {2061                id: collection_id,2062                collection2063            })2064            .ok_or(Error::<T>::CollectionNotFound)?)2065    }20662067    fn save_collection(collection: CollectionHandle<T>) {2068        <CollectionById<T>>::insert(collection.id, collection.collection);2069    }20702071    fn check_owner_permissions(target_collection: &CollectionHandle<T>, subject: T::AccountId) -> DispatchResult {2072        ensure!(2073            subject == target_collection.owner,2074            Error::<T>::NoPermission2075        );20762077        Ok(())2078    }20792080    fn is_owner_or_admin_permissions(collection: &CollectionHandle<T>, subject: T::AccountId) -> bool {2081        subject == collection.owner || <AdminList<T>>::get(collection.id).contains(&subject)2082    }20832084    fn check_owner_or_admin_permissions(2085        collection: &CollectionHandle<T>,2086        subject: T::AccountId,2087    ) -> DispatchResult {2088        ensure!(Self::is_owner_or_admin_permissions(collection, subject), Error::<T>::NoPermission);20892090        Ok(())2091    }20922093    fn owned_amount(2094        subject: T::AccountId,2095        target_collection: &CollectionHandle<T>,2096        item_id: TokenId,2097    ) -> Option<u128> {2098        let collection_id = target_collection.id;20992100        match target_collection.mode {2101            CollectionMode::NFT => (<NftItemList<T>>::get(collection_id, item_id)?.owner == subject)2102                .then(|| 1),2103            CollectionMode::Fungible(_) => Some(<FungibleItemList<T>>::get(collection_id, &subject)2104                .value),2105            CollectionMode::ReFungible => <ReFungibleItemList<T>>::get(collection_id, item_id)?2106                .owner2107                .iter()2108                .find(|i| i.owner == subject)2109                .map(|i| i.fraction),2110            CollectionMode::Invalid => None,2111        }2112    }21132114    fn is_item_owner(subject: T::AccountId, target_collection: &CollectionHandle<T>, item_id: TokenId) -> bool {2115        match target_collection.mode {2116            CollectionMode::Fungible(_) => true,2117            _ => Self::owned_amount(subject, target_collection, item_id).is_some(),2118        }2119    }21202121    fn check_white_list(collection: &CollectionHandle<T>, address: &T::AccountId) -> DispatchResult {2122        let collection_id = collection.id;21232124        let mes = Error::<T>::AddresNotInWhiteList;2125        ensure!(<WhiteList<T>>::contains_key(collection_id, address), mes);21262127        Ok(())2128    }21292130    /// Check if token exists. In case of Fungible, check if there is an entry for 2131    /// the owner in fungible balances double map2132    fn token_exists(2133        target_collection: &CollectionHandle<T>,2134        item_id: TokenId,2135    ) -> DispatchResult {2136        let collection_id = target_collection.id;2137        let exists = match target_collection.mode2138        {2139            CollectionMode::NFT => <NftItemList<T>>::contains_key(collection_id, item_id),2140            CollectionMode::Fungible(_)  => true,2141            CollectionMode::ReFungible  => <ReFungibleItemList<T>>::contains_key(collection_id, item_id),2142            _ => false2143        };21442145        ensure!(exists == true, Error::<T>::TokenNotFound);2146        Ok(())2147    }21482149    fn transfer_fungible(2150        collection: &CollectionHandle<T>,2151        value: u128,2152        owner: &T::AccountId,2153        recipient: &T::AccountId,2154    ) -> DispatchResult {2155        let collection_id = collection.id;21562157        let mut balance = <FungibleItemList<T>>::get(collection_id, owner);2158        ensure!(balance.value >= value, Error::<T>::TokenValueTooLow);21592160        // Send balance to recipient (updates balanceOf of recipient)2161        Self::add_fungible_item(collection, recipient, value)?;21622163        // update balanceOf of sender2164        <Balance<T>>::insert(collection_id, (*owner).clone(), balance.value - value);21652166        // Reduce or remove sender2167        if balance.value == value {2168            <FungibleItemList<T>>::remove(collection_id, owner);2169        }2170        else {2171            balance.value -= value;2172            <FungibleItemList<T>>::insert(collection_id, (*owner).clone(), balance);2173        }21742175        Ok(())2176    }21772178    fn transfer_refungible(2179        collection: &CollectionHandle<T>,2180        item_id: TokenId,2181        value: u128,2182        owner: T::AccountId,2183        new_owner: T::AccountId,2184    ) -> DispatchResult {2185        let collection_id = collection.id;2186        let full_item = <ReFungibleItemList<T>>::get(collection_id, item_id)2187            .ok_or(Error::<T>::TokenNotFound)?;21882189        let item = full_item2190            .owner2191            .iter()2192            .filter(|i| i.owner == owner)2193            .next()2194            .ok_or(Error::<T>::TokenNotFound)?;2195        let amount = item.fraction;21962197        ensure!(amount >= value, Error::<T>::TokenValueTooLow);21982199        // update balance2200        let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.clone())2201            .checked_sub(value)2202            .ok_or(Error::<T>::NumOverflow)?;2203        <Balance<T>>::insert(collection_id, item.owner.clone(), balance_old_owner);22042205        let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.clone())2206            .checked_add(value)2207            .ok_or(Error::<T>::NumOverflow)?;2208        <Balance<T>>::insert(collection_id, new_owner.clone(), balance_new_owner);22092210        let old_owner = item.owner.clone();2211        let new_owner_has_account = full_item.owner.iter().any(|i| i.owner == new_owner);22122213        // transfer2214        if amount == value && !new_owner_has_account {2215            // change owner2216            // new owner do not have account2217            let mut new_full_item = full_item.clone();2218            new_full_item2219                .owner2220                .iter_mut()2221                .find(|i| i.owner == owner)2222                .expect("old owner does present in refungible")2223                .owner = new_owner.clone();2224            <ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);22252226            // update index collection2227            Self::move_token_index(collection_id, item_id, &old_owner, &new_owner)?;2228        } else {2229            let mut new_full_item = full_item.clone();2230            new_full_item2231                .owner2232                .iter_mut()2233                .find(|i| i.owner == owner)2234                .expect("old owner does present in refungible")2235                .fraction -= value;22362237            // separate amount2238            if new_owner_has_account {2239                // new owner has account2240                new_full_item2241                    .owner2242                    .iter_mut()2243                    .find(|i| i.owner == new_owner)2244                    .expect("new owner has account")2245                    .fraction += value;2246            } else {2247                // new owner do not have account2248                new_full_item.owner.push(Ownership {2249                    owner: new_owner.clone(),2250                    fraction: value,2251                });2252                Self::add_token_index(collection_id, item_id, &new_owner)?;2253            }22542255            <ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);2256        }22572258        Ok(())2259    }22602261    fn transfer_nft(2262        collection: &CollectionHandle<T>,2263        item_id: TokenId,2264        sender: T::AccountId,2265        new_owner: T::AccountId,2266    ) -> DispatchResult {2267        let collection_id = collection.id;2268        let mut item = <NftItemList<T>>::get(collection_id, item_id)2269            .ok_or(Error::<T>::TokenNotFound)?;22702271        ensure!(2272            sender == item.owner,2273            Error::<T>::MustBeTokenOwner2274        );22752276        // update balance2277        let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.clone())2278            .checked_sub(1)2279            .ok_or(Error::<T>::NumOverflow)?;2280        <Balance<T>>::insert(collection_id, item.owner.clone(), balance_old_owner);22812282        let balancenew_owner = <Balance<T>>::get(collection_id, new_owner.clone())2283            .checked_add(1)2284            .ok_or(Error::<T>::NumOverflow)?;2285        <Balance<T>>::insert(collection_id, new_owner.clone(), balancenew_owner);22862287        // change owner2288        let old_owner = item.owner.clone();2289        item.owner = new_owner.clone();2290        <NftItemList<T>>::insert(collection_id, item_id, item);22912292        // update index collection2293        Self::move_token_index(collection_id, item_id, &old_owner, &new_owner)?;22942295        Ok(())2296    }2297    2298    fn set_re_fungible_variable_data(2299        collection: &CollectionHandle<T>,2300        item_id: TokenId,2301        data: Vec<u8>2302    ) -> DispatchResult {2303        let collection_id = collection.id;2304        let mut item = <ReFungibleItemList<T>>::get(collection_id, item_id)2305            .ok_or(Error::<T>::TokenNotFound)?;23062307        item.variable_data = data;23082309        <ReFungibleItemList<T>>::insert(collection_id, item_id, item);23102311        Ok(())2312    }23132314    fn set_nft_variable_data(2315        collection: &CollectionHandle<T>,2316        item_id: TokenId,2317        data: Vec<u8>2318    ) -> DispatchResult {2319        let collection_id = collection.id;2320        let mut item = <NftItemList<T>>::get(collection_id, item_id)2321            .ok_or(Error::<T>::TokenNotFound)?;2322        2323        item.variable_data = data;23242325        <NftItemList<T>>::insert(collection_id, item_id, item);2326        2327        Ok(())2328    }23292330    fn init_collection(item: &Collection<T>) {2331        // check params2332        assert!(2333            item.decimal_points <= MAX_DECIMAL_POINTS,2334            "decimal_points parameter must be lower than MAX_DECIMAL_POINTS"2335        );2336        assert!(2337            item.name.len() <= 64,2338            "Collection name can not be longer than 63 char"2339        );2340        assert!(2341            item.name.len() <= 256,2342            "Collection description can not be longer than 255 char"2343        );2344        assert!(2345            item.token_prefix.len() <= 16,2346            "Token prefix can not be longer than 15 char"2347        );23482349        // Generate next collection ID2350        let next_id = CreatedCollectionCount::get()2351            .checked_add(1)2352            .unwrap();23532354        CreatedCollectionCount::put(next_id);2355    }23562357    fn init_nft_token(collection_id: CollectionId, item: &NftItemType<T::AccountId>) {2358        let current_index = <ItemListIndex>::get(collection_id)2359            .checked_add(1)2360            .unwrap();23612362        let item_owner = item.owner.clone();2363        Self::add_token_index(collection_id, current_index, &item.owner).unwrap();23642365        <ItemListIndex>::insert(collection_id, current_index);23662367        // Update balance2368        let new_balance = <Balance<T>>::get(collection_id, &item_owner)2369            .checked_add(1)2370            .unwrap();2371        <Balance<T>>::insert(collection_id, item_owner.clone(), new_balance);2372    }23732374    fn init_fungible_token(collection_id: CollectionId, owner: &T::AccountId, item: &FungibleItemType) {2375        let current_index = <ItemListIndex>::get(collection_id)2376            .checked_add(1)2377            .unwrap();23782379        Self::add_token_index(collection_id, current_index, owner).unwrap();23802381        <ItemListIndex>::insert(collection_id, current_index);23822383        // Update balance2384        let new_balance = <Balance<T>>::get(collection_id, owner)2385            .checked_add(item.value)2386            .unwrap();2387        <Balance<T>>::insert(collection_id, (*owner).clone(), new_balance);2388    }23892390    fn init_refungible_token(collection_id: CollectionId, item: &ReFungibleItemType<T::AccountId>) {2391        let current_index = <ItemListIndex>::get(collection_id)2392            .checked_add(1)2393            .unwrap();23942395        let value = item.owner.first().unwrap().fraction;2396        let owner = item.owner.first().unwrap().owner.clone();23972398        Self::add_token_index(collection_id, current_index, &owner).unwrap();23992400        <ItemListIndex>::insert(collection_id, current_index);24012402        // Update balance2403        let new_balance = <Balance<T>>::get(collection_id, &owner)2404            .checked_add(value)2405            .unwrap();2406        <Balance<T>>::insert(collection_id, owner.clone(), new_balance);2407    }24082409    fn add_token_index(collection_id: CollectionId, item_index: TokenId, owner: &T::AccountId) -> DispatchResult {2410        // add to account limit2411        if <AccountItemCount<T>>::contains_key(owner) {24122413            // bound Owned tokens by a single address2414            let count = <AccountItemCount<T>>::get(owner);2415            ensure!(count < ChainLimit::get().account_token_ownership_limit, Error::<T>::AddressOwnershipLimitExceeded);24162417            <AccountItemCount<T>>::insert(owner.clone(), count2418                .checked_add(1)2419                .ok_or(Error::<T>::NumOverflow)?);2420        }2421        else {2422            <AccountItemCount<T>>::insert(owner.clone(), 1);2423        }24242425        let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner);2426        if list_exists {2427            let mut list = <AddressTokens<T>>::get(collection_id, owner);2428            let item_contains = list.contains(&item_index.clone());24292430            if !item_contains {2431                list.push(item_index.clone());2432            }24332434            <AddressTokens<T>>::insert(collection_id, owner.clone(), list);2435        } else {2436            let mut itm = Vec::new();2437            itm.push(item_index.clone());2438            <AddressTokens<T>>::insert(collection_id, owner.clone(), itm);2439        }24402441        Ok(())2442    }24432444    fn remove_token_index(2445        collection_id: CollectionId,2446        item_index: TokenId,2447        owner: &T::AccountId,2448    ) -> DispatchResult {24492450        // update counter2451        <AccountItemCount<T>>::insert(owner.clone(), 2452            <AccountItemCount<T>>::get(owner)2453            .checked_sub(1)2454            .ok_or(Error::<T>::NumOverflow)?);245524562457        let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner);2458        if list_exists {2459            let mut list = <AddressTokens<T>>::get(collection_id, owner);2460            let item_contains = list.contains(&item_index.clone());24612462            if item_contains {2463                list.retain(|&item| item != item_index);2464                <AddressTokens<T>>::insert(collection_id, owner.clone(), list);2465            }2466        }24672468        Ok(())2469    }24702471    fn move_token_index(2472        collection_id: CollectionId,2473        item_index: TokenId,2474        old_owner: &T::AccountId,2475        new_owner: &T::AccountId,2476    ) -> DispatchResult {2477        Self::remove_token_index(collection_id, item_index, old_owner)?;2478        Self::add_token_index(collection_id, item_index, new_owner)?;24792480        Ok(())2481    }2482    2483    fn ensure_contract_owned(account: T::AccountId, contract: &T::AccountId) -> DispatchResult {2484        ensure!(<ContractOwner<T>>::get(contract) == Some(account), Error::<T>::NoPermission);24852486        Ok(())2487    }2488}24892490////////////////////////////////////////////////////////////////////////////////////////////////////2491// Economic models2492// #region24932494/// Fee multiplier.2495pub type Multiplier = FixedU128;24962497type BalanceOf<T> = <<T as pallet_transaction_payment::Config>::OnChargeTransaction as pallet_transaction_payment::OnChargeTransaction<T>>::Balance;24982499/// Require the transactor pay for themselves and maybe include a tip to gain additional priority2500/// in the queue.2501#[derive(Encode, Decode, Clone, Eq, PartialEq)]2502pub struct ChargeTransactionPayment<T: Config>(#[codec(compact)] BalanceOf<T>);25032504impl<T: Config + Send + Sync> sp_std::fmt::Debug 2505    for ChargeTransactionPayment<T>2506{2507	#[cfg(feature = "std")]2508	fn fmt(&self, f: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {2509		write!(f, "ChargeTransactionPayment<{:?}>", self.0)2510	}2511	#[cfg(not(feature = "std"))]2512	fn fmt(&self, _: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {2513		Ok(())2514	}2515}25162517impl<T: Config> ChargeTransactionPayment<T>2518where2519    T::Call: Dispatchable<Info=DispatchInfo, PostInfo=PostDispatchInfo> + IsSubType<Call<T>> + IsSubType<pallet_contracts::Call<T>>,2520    BalanceOf<T>: Send + Sync + From<u64> + FixedPointOperand,2521    T::AccountId: AsRef<[u8]>,2522    T::AccountId: UncheckedFrom<T::Hash>,2523{2524    fn traditional_fee(2525        len: usize,2526        info: &DispatchInfoOf<T::Call>,2527        tip: BalanceOf<T>,2528    ) -> BalanceOf<T>2529    where2530        T::Call: Dispatchable<Info = DispatchInfo>,2531    {2532        <pallet_transaction_payment::Module<T>>::compute_fee(len as u32, info, tip)2533    }25342535	fn get_priority(len: usize, info: &DispatchInfoOf<T::Call>, final_fee: BalanceOf<T>) -> TransactionPriority {2536        let weight_saturation = T::BlockWeights::get().max_block / info.weight.max(1);2537        let max_block_length = *T::BlockLength::get().max.get(DispatchClass::Normal);2538        let len_saturation = max_block_length as u64 / (len as u64).max(1);2539        let coefficient: BalanceOf<T> = weight_saturation2540            .min(len_saturation)2541            .saturated_into::<BalanceOf<T>>();2542        final_fee2543            .saturating_mul(coefficient)2544            .saturated_into::<TransactionPriority>()2545    }25462547    fn withdraw_fee(2548        &self,2549        who: &T::AccountId,2550        call: &T::Call,2551        info: &DispatchInfoOf<T::Call>,2552        len: usize,2553	) -> Result<2554		(2555			BalanceOf<T>,2556			<<T as pallet_transaction_payment::Config>::OnChargeTransaction as pallet_transaction_payment::OnChargeTransaction<T>>::LiquidityInfo,2557		),2558		TransactionValidityError,2559	> {2560        let tip = self.0;25612562        let fee = Self::traditional_fee(len, info, tip);25632564        // Only mess with balances if fee is not zero.2565        if fee.is_zero() {2566            return <<T as pallet_transaction_payment::Config>::OnChargeTransaction as pallet_transaction_payment::OnChargeTransaction<T>>::withdraw_fee(who, call, info, fee, tip)2567			.map(|i| (fee, i));2568        }25692570        // Determine who is paying transaction fee based on ecnomic model2571        // Parse call to extract collection ID and access collection sponsor2572        let mut sponsor: Option<T::AccountId> = (|| match IsSubType::<Call<T>>::is_sub_type(call) {2573            Some(Call::create_item(collection_id, _owner, _properties)) => {2574                let collection = <CollectionById<T>>::get(collection_id)?;25752576                // sponsor timeout2577                let block_number = <system::Module<T>>::block_number() as T::BlockNumber;25782579                let limit = collection.limits.sponsor_transfer_timeout;2580                if <CreateItemBasket<T>>::contains_key((collection_id, &who)) {2581                    let last_tx_block = <CreateItemBasket<T>>::get((collection_id, &who));2582                    let limit_time = last_tx_block + limit.into();2583                    if block_number <= limit_time {2584                        return None;2585                    }2586                }2587                <CreateItemBasket<T>>::insert((collection_id, who.clone()), block_number);25882589                // check free create limit2590                if collection.limits.sponsored_data_size >= (_properties.len() as u32) {2591                    collection.sponsorship.sponsor()2592                        .cloned()2593                } else {2594                    None2595                }2596            }2597            Some(Call::transfer(_new_owner, collection_id, item_id, _value)) => {2598                let collection = <CollectionById<T>>::get(collection_id)?;2599                2600                let mut sponsor_transfer = false;2601                if collection.sponsorship.confirmed() {26022603                    let collection_limits = collection.limits;2604                    let collection_mode = collection.mode;2605    2606                    // sponsor timeout2607                    let block_number = <system::Module<T>>::block_number() as T::BlockNumber;2608                    sponsor_transfer = match collection_mode {2609                        CollectionMode::NFT => {2610    2611                            // get correct limit2612                            let limit: u32 = if collection_limits.sponsor_transfer_timeout > 0 {2613                                collection_limits.sponsor_transfer_timeout2614                            } else {2615                                ChainLimit::get().nft_sponsor_transfer_timeout2616                            };2617    2618                            let mut sponsored = true;2619                            if <NftTransferBasket<T>>::contains_key(collection_id, item_id) {2620                                let last_tx_block = <NftTransferBasket<T>>::get(collection_id, item_id);2621                                let limit_time = last_tx_block + limit.into();2622                                if block_number <= limit_time {2623                                    sponsored = false;2624                                }2625                            }2626                            if sponsored {2627                                <NftTransferBasket<T>>::insert(collection_id, item_id, block_number);2628                            }26292630                            sponsored2631                        }2632                        CollectionMode::Fungible(_) => {2633    2634                            // get correct limit2635                            let limit: u32 = if collection_limits.sponsor_transfer_timeout > 0 {2636                                collection_limits.sponsor_transfer_timeout2637                            } else {2638                                ChainLimit::get().fungible_sponsor_transfer_timeout2639                            };2640    2641                            let block_number = <system::Module<T>>::block_number() as T::BlockNumber;2642                            let mut sponsored = true;2643                            if <FungibleTransferBasket<T>>::contains_key(collection_id, who) {2644                                let last_tx_block = <FungibleTransferBasket<T>>::get(collection_id, who);2645                                let limit_time = last_tx_block + limit.into();2646                                if block_number <= limit_time {2647                                    sponsored = false;2648                                }2649                            }2650                            if sponsored {2651                                <FungibleTransferBasket<T>>::insert(collection_id, who, block_number);2652                            }26532654                            sponsored2655                        }2656                        CollectionMode::ReFungible => {2657    2658                            // get correct limit2659                            let limit: u32 = if collection_limits.sponsor_transfer_timeout > 0 {2660                                collection_limits.sponsor_transfer_timeout2661                            } else {2662                                ChainLimit::get().refungible_sponsor_transfer_timeout2663                            };2664    2665                            let mut sponsored = true;2666                            if <ReFungibleTransferBasket<T>>::contains_key(collection_id, item_id) {2667                                let last_tx_block = <ReFungibleTransferBasket<T>>::get(collection_id, item_id);2668                                let limit_time = last_tx_block + limit.into();2669                                if block_number <= limit_time {2670                                    sponsored = false;2671                                }2672                            }2673                            if sponsored {2674                                <ReFungibleTransferBasket<T>>::insert(collection_id, item_id, block_number);2675                            }26762677                            sponsored2678                        }2679                        _ => {2680                            false2681                        },2682                    };2683                }26842685                if !sponsor_transfer {2686                    None2687                } else {2688                    collection.sponsorship.sponsor()2689                        .cloned()2690                }2691            }26922693            Some(Call::set_variable_meta_data(collection_id, item_id, data)) => {2694                let mut sponsor_metadata_changes = false;26952696                let collection = <CollectionById<T>>::get(collection_id)?;26972698                if2699                    collection.sponsorship.confirmed() &&2700                    // Can't sponsor fungible collection, this tx will be rejected2701                    // as invalid2702                    !matches!(collection.mode, CollectionMode::Fungible(_)) &&2703                    data.len() <= collection.limits.sponsored_data_size as usize2704                {2705                    if let Some(rate_limit) = collection.limits.sponsored_data_rate_limit {2706                        let block_number = <system::Module<T>>::block_number() as T::BlockNumber;27072708                        if <VariableMetaDataBasket<T>>::get(collection_id, item_id)2709                            .map(|last_block| block_number - last_block > rate_limit)2710                            .unwrap_or(true) 2711                        {2712                            sponsor_metadata_changes = true;2713                            <VariableMetaDataBasket<T>>::insert(collection_id, item_id, block_number);2714                        }2715                    }2716                }27172718                if !sponsor_metadata_changes {2719                    None2720                } else {2721                    collection.sponsorship.sponsor().cloned()2722                }2723            }27242725            _ => None,2726        })();27272728        match IsSubType::<pallet_contracts::Call<T>>::is_sub_type(call) {2729            Some(pallet_contracts::Call::call(dest, _value, _gas_limit, _data)) => {27302731                let called_contract: T::AccountId = T::Lookup::lookup((*dest).clone()).unwrap_or(T::AccountId::default());27322733                let owned_contract = <ContractOwner<T>>::get(called_contract.clone()).as_ref() == Some(who);2734                let white_list_enabled = <ContractWhiteListEnabled<T>>::contains_key(called_contract.clone());2735                  2736                if !owned_contract && white_list_enabled {2737                    if !<ContractWhiteList<T>>::contains_key(called_contract.clone(), who) {2738                        return Err(InvalidTransaction::Call.into());2739                    }2740                }2741            },2742            _ => {},2743        }27442745        // Sponsor smart contracts2746        sponsor = sponsor.or_else(|| match IsSubType::<pallet_contracts::Call<T>>::is_sub_type(call) {27472748            // On instantiation: set the contract owner2749            Some(pallet_contracts::Call::instantiate(_endowment, _gas_limit, code_hash, _data, salt)) => {27502751                let new_contract_address = <pallet_contracts::Module<T>>::contract_address(2752                    &who,2753                    code_hash,2754                    salt,2755                );2756                <ContractOwner<T>>::insert(new_contract_address.clone(), who.clone());27572758                None2759            },27602761            // On instantiation with code: set the contract owner2762            Some(pallet_contracts::Call::instantiate_with_code(_endowment, _gas_limit, _code, _data, _salt))  => {27632764                let new_contract_address = <pallet_contracts::Module<T>>::contract_address(2765                    &who,2766                    &T::Hashing::hash(&_code),2767                    _salt,2768                );27692770                <ContractOwner<T>>::insert(new_contract_address.clone(), who.clone());27712772                None2773            }27742775            // When the contract is called, check if the sponsoring is enabled and pay fees from contract endowment if it is2776            Some(pallet_contracts::Call::call(dest, _value, _gas_limit, _data)) => {27772778                let called_contract: T::AccountId = T::Lookup::lookup((*dest).clone()).unwrap_or(T::AccountId::default());27792780                let mut sponsor_transfer = false;2781                if <ContractSponsoringRateLimit<T>>::contains_key(called_contract.clone()) {2782                    let last_tx_block = <ContractSponsorBasket<T>>::get((&called_contract, &who));2783                    let block_number = <system::Module<T>>::block_number() as T::BlockNumber;2784                    let rate_limit = <ContractSponsoringRateLimit<T>>::get(&called_contract);2785                    let limit_time = last_tx_block + rate_limit;27862787                    if block_number >= limit_time {2788                        <ContractSponsorBasket<T>>::insert((called_contract.clone(), who.clone()), block_number);2789                        sponsor_transfer = true;2790                    }2791                } else {2792                    sponsor_transfer = false;2793                }2794               2795                if sponsor_transfer {2796                    if <ContractSelfSponsoring<T>>::contains_key(called_contract.clone()) {2797                        if <ContractSelfSponsoring<T>>::get(called_contract.clone()) {2798                            return Some(called_contract);2799                        }2800                    }2801                }28022803                None2804            },28052806            _ => None,2807        });28082809        let who_pays_fee = sponsor.unwrap_or_else(|| who.clone());28102811		<<T as pallet_transaction_payment::Config>::OnChargeTransaction as pallet_transaction_payment::OnChargeTransaction<T>>::withdraw_fee(&who_pays_fee, call, info, fee, tip)2812			.map(|i| (fee, i))2813    }2814}281528162817impl<T: Config + Send + Sync> SignedExtension2818    for ChargeTransactionPayment<T>2819where2820    BalanceOf<T>: Send + Sync + From<u64> + FixedPointOperand,2821    T::Call: Dispatchable<Info = DispatchInfo, PostInfo = PostDispatchInfo> + IsSubType<Call<T>> + IsSubType<pallet_contracts::Call<T>>,2822    T::AccountId: AsRef<[u8]>,2823    T::AccountId: UncheckedFrom<T::Hash>,2824{2825    const IDENTIFIER: &'static str = "ChargeTransactionPayment";2826    type AccountId = T::AccountId;2827    type Call = T::Call;2828    type AdditionalSigned = ();2829    type Pre = (2830        // tip2831        BalanceOf<T>,2832        // who pays fee2833        Self::AccountId,2834		// imbalance resulting from withdrawing the fee2835		<<T as pallet_transaction_payment::Config>::OnChargeTransaction as pallet_transaction_payment::OnChargeTransaction<T>>::LiquidityInfo,2836    );2837    fn additional_signed(&self) -> sp_std::result::Result<(), TransactionValidityError> {2838        Ok(())2839    }28402841    fn validate(2842        &self,2843        who: &Self::AccountId,2844        call: &Self::Call,2845        info: &DispatchInfoOf<Self::Call>,2846        len: usize,2847    ) -> TransactionValidity {2848		let (fee, _) = self.withdraw_fee(who, call, info, len)?;2849		Ok(ValidTransaction {2850			priority: Self::get_priority(len, info, fee),2851			..Default::default()2852		})2853    }28542855    fn pre_dispatch(2856        self,2857        who: &Self::AccountId,2858        call: &Self::Call,2859        info: &DispatchInfoOf<Self::Call>,2860        len: usize,2861    ) -> Result<Self::Pre, TransactionValidityError> {2862        let (_fee, imbalance) = self.withdraw_fee(who, call, info, len)?;2863        Ok((self.0, who.clone(), imbalance))2864    }28652866    fn post_dispatch(2867        pre: Self::Pre,2868        info: &DispatchInfoOf<Self::Call>,2869        post_info: &PostDispatchInfoOf<Self::Call>,2870        len: usize,2871        _result: &DispatchResult,2872    ) -> Result<(), TransactionValidityError> {2873		let (tip, who, imbalance) = pre;2874		let actual_fee = pallet_transaction_payment::Module::<T>::compute_actual_fee(2875			len as u32,2876			info,2877			post_info,2878			tip,2879		);2880		<T as pallet_transaction_payment::Config>::OnChargeTransaction::correct_and_deposit_fee(&who, info, post_info, actual_fee, tip, imbalance)?;2881		Ok(())2882    }2883}28842885// #endregion