git.delta.rocks / unique-network / refs/commits / 9180c847b05a

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,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};3334use frame_system::{self as system, ensure_signed, ensure_root};35use sp_runtime::sp_std::prelude::Vec;36use sp_runtime::{37    traits::{38        Hash, DispatchInfoOf, Dispatchable, PostDispatchInfoOf, Saturating, SaturatedConversion, SignedExtension, Zero,39    },40    transaction_validity::{41        TransactionPriority, InvalidTransaction, TransactionValidity, TransactionValidityError, ValidTransaction,42    },43    FixedPointOperand, FixedU128,44};45use sp_runtime::traits::StaticLookup;46use pallet_contracts::chain_extension::UncheckedFrom;47use pallet_transaction_payment::OnChargeTransaction;4849#[cfg(test)]50mod mock;5152#[cfg(test)]53mod tests;5455mod default_weights;5657pub const MAX_DECIMAL_POINTS: DecimalPoints = 30;58pub const MAX_REFUNGIBLE_PIECES: u128 = 1_000_000_000_000_000_000_000;59pub const MAX_SPONSOR_TIMEOUT: u32 = 10_368_000;60pub const MAX_TOKEN_OWNERSHIP: u32 = 10_000_000;6162// Structs63// #region6465pub type CollectionId = u32;66pub type TokenId = u32;67pub type DecimalPoints = u8;6869#[derive(Encode, Decode, Eq, Debug, Clone, PartialEq)]70#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]71pub enum CollectionMode {72    Invalid,73    NFT,74    // decimal points75    Fungible(DecimalPoints),76    ReFungible,77}7879impl Default for CollectionMode {80    fn default() -> Self {81        Self::Invalid82    }83}8485impl Into<u8> for CollectionMode {86    fn into(self) -> u8 {87        match self {88            CollectionMode::Invalid => 0,89            CollectionMode::NFT => 1,90            CollectionMode::Fungible(_) => 2,91            CollectionMode::ReFungible => 3,92        }93    }94}9596#[derive(Encode, Decode, Eq, Debug, Clone, PartialEq)]97#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]98pub enum AccessMode {99    Normal,100    WhiteList,101}102impl Default for AccessMode {103    fn default() -> Self {104        Self::Normal105    }106}107108#[derive(Encode, Decode, Eq, Debug, Clone, PartialEq)]109#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]110pub enum SchemaVersion {111    ImageURL,112    Unique,113}114impl Default for SchemaVersion {115    fn default() -> Self {116        Self::ImageURL117    }118}119120#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]121#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]122pub struct Ownership<AccountId> {123    pub owner: AccountId,124    pub fraction: u128,125}126127#[derive(Encode, Decode, Clone, PartialEq)]128#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]129pub struct Collection<T: Config> {130    pub owner: T::AccountId,131    pub mode: CollectionMode,132    pub access: AccessMode,133    pub decimal_points: DecimalPoints,134    pub name: Vec<u16>,        // 64 include null escape char135    pub description: Vec<u16>, // 256 include null escape char136    pub token_prefix: Vec<u8>, // 16 include null escape char137    pub mint_mode: bool,138    pub offchain_schema: Vec<u8>,139    pub schema_version: SchemaVersion,140    pub sponsor: T::AccountId, // Who pays fees. If set to default address, the fees are applied to the transaction sender141    pub sponsor_confirmed: bool, // False if sponsor address has not yet confirmed sponsorship. True otherwise.142    pub limits: CollectionLimits<T::BlockNumber>, // Collection private restrictions 143    pub variable_on_chain_schema: Vec<u8>, //144    pub const_on_chain_schema: Vec<u8>, //145}146147pub struct CollectionHandle<T: Config> {148    pub id: CollectionId,149    collection: Collection<T>,150}151152impl<T: Config> Deref for CollectionHandle<T> {153    type Target = Collection<T>;154155    fn deref(&self) -> &Self::Target {156        &self.collection157    }158}159160impl<T: Config> DerefMut for CollectionHandle<T> {161    fn deref_mut(&mut self) -> &mut Self::Target {162        &mut self.collection163    }164}165166#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]167#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]168pub struct NftItemType<AccountId> {169    pub owner: AccountId,170    pub const_data: Vec<u8>,171    pub variable_data: Vec<u8>,172}173174#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]175#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]176pub struct FungibleItemType {177    pub value: u128,178}179180#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]181#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]182pub struct ReFungibleItemType<AccountId> {183    pub owner: Vec<Ownership<AccountId>>,184    pub const_data: Vec<u8>,185    pub variable_data: Vec<u8>,186}187188// #[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]189// #[cfg_attr(feature = "std", derive(Serialize, Deserialize))]190// pub struct VestingItem<AccountId, Moment> {191//     pub sender: AccountId,192//     pub recipient: AccountId,193//     pub collection_id: CollectionId,194//     pub item_id: TokenId,195//     pub amount: u64,196//     pub vesting_date: Moment,197// }198199#[derive(Encode, Decode, Debug, Clone, PartialEq)]200#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]201pub struct CollectionLimits<BlockNumber: Encode + Decode> {202    pub account_token_ownership_limit: u32,203    pub sponsored_data_size: u32,204    /// None - setVariableMetadata is not sponsored205    /// Some(v) - setVariableMetadata is sponsored 206    ///           if there is v block between txs207    pub sponsored_data_rate_limit: Option<BlockNumber>,208    pub token_limit: u32,209210    // Timeouts for item types in passed blocks211    pub sponsor_transfer_timeout: u32,212    pub owner_can_transfer: bool,213    pub owner_can_destroy: bool,214}215216impl<BlockNumber: Encode + Decode> Default for CollectionLimits<BlockNumber> {217    fn default() -> Self {218        Self { 219            account_token_ownership_limit: 10_000_000, 220            token_limit: u32::max_value(),221            sponsored_data_size: u32::MAX, 222            sponsored_data_rate_limit: None,223            sponsor_transfer_timeout: 14400,224            owner_can_transfer: true,225            owner_can_destroy: true226        }227    }228}229230#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]231#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]232pub struct ChainLimits {233    pub collection_numbers_limit: u32,234    pub account_token_ownership_limit: u32,235    pub collections_admins_limit: u64,236    pub custom_data_limit: u32,237238    // Timeouts for item types in passed blocks239    pub nft_sponsor_transfer_timeout: u32,240    pub fungible_sponsor_transfer_timeout: u32,241    pub refungible_sponsor_transfer_timeout: u32,242243    // Schema limits244    pub offchain_schema_limit: u32,245    pub variable_on_chain_schema_limit: u32,246    pub const_on_chain_schema_limit: u32,247}248249pub trait WeightInfo {250	fn create_collection() -> Weight;251	fn destroy_collection() -> Weight;252	fn add_to_white_list() -> Weight;253	fn remove_from_white_list() -> Weight;254    fn set_public_access_mode() -> Weight;255    fn set_mint_permission() -> Weight;256    fn change_collection_owner() -> Weight;257    fn add_collection_admin() -> Weight;258    fn remove_collection_admin() -> Weight;259    fn set_collection_sponsor() -> Weight;260    fn confirm_sponsorship() -> Weight;261    fn remove_collection_sponsor() -> Weight;262    fn create_item(s: usize) -> Weight;263    fn burn_item() -> Weight;264    fn transfer() -> Weight;265    fn approve() -> Weight;266    fn transfer_from() -> Weight;267    fn set_offchain_schema() -> Weight;268    fn set_const_on_chain_schema() -> Weight;269    fn set_variable_on_chain_schema() -> Weight;270    fn set_variable_meta_data() -> Weight;271    fn enable_contract_sponsoring() -> Weight;272    fn set_schema_version() -> Weight;273    fn set_chain_limits() -> Weight;274    fn set_contract_sponsoring_rate_limit() -> Weight;275    fn set_variable_meta_data_sponsoring_rate_limit() -> Weight;276    fn toggle_contract_white_list() -> Weight;277    fn add_to_contract_white_list() -> Weight;278    fn remove_from_contract_white_list() -> Weight;279    fn set_collection_limits() -> Weight;280}281282#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]283#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]284pub struct CreateNftData {285    pub const_data: Vec<u8>,286    pub variable_data: Vec<u8>,287}288289#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]290#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]291pub struct CreateFungibleData {292    pub value: u128,293}294295#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]296#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]297pub struct CreateReFungibleData {298    pub const_data: Vec<u8>,299    pub variable_data: Vec<u8>,300    pub pieces: u128,301}302303#[derive(Encode, Decode, Debug, Clone, PartialEq)]304#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]305pub enum CreateItemData {306    NFT(CreateNftData),307    Fungible(CreateFungibleData),308    ReFungible(CreateReFungibleData),309}310311impl CreateItemData {312    pub fn len(&self) -> usize {313        let len = match self {314            CreateItemData::NFT(data) => data.variable_data.len() + data.const_data.len(),315            CreateItemData::ReFungible(data) => data.variable_data.len() + data.const_data.len(),316            _ => 0317        };318        319        return len;320    }321}322323impl From<CreateNftData> for CreateItemData {324    fn from(item: CreateNftData) -> Self {325        CreateItemData::NFT(item)326    }327}328329impl From<CreateReFungibleData> for CreateItemData {330    fn from(item: CreateReFungibleData) -> Self {331        CreateItemData::ReFungible(item)332    }333}334335impl From<CreateFungibleData> for CreateItemData {336    fn from(item: CreateFungibleData) -> Self {337        CreateItemData::Fungible(item)338    }339}340341342decl_error! {343	/// Error for non-fungible-token module.344	pub enum Error for Module<T: Config> {345        /// Total collections bound exceeded.346        TotalCollectionsLimitExceeded,347		/// Decimal_points parameter must be lower than MAX_DECIMAL_POINTS constant, currently it is 30.348        CollectionDecimalPointLimitExceeded, 349        /// Collection name can not be longer than 63 char.350        CollectionNameLimitExceeded, 351        /// Collection description can not be longer than 255 char.352        CollectionDescriptionLimitExceeded, 353        /// Token prefix can not be longer than 15 char.354        CollectionTokenPrefixLimitExceeded,355        /// This collection does not exist.356        CollectionNotFound,357        /// Item not exists.358        TokenNotFound,359        /// Admin not found360        AdminNotFound,361        /// Arithmetic calculation overflow.362        NumOverflow,       363        /// Account already has admin role.364        AlreadyAdmin,  365        /// You do not own this collection.366        NoPermission,367        /// This address is not set as sponsor, use setCollectionSponsor first.368        ConfirmUnsetSponsorFail,369        /// Collection is not in mint mode.370        PublicMintingNotAllowed,371        /// Sender parameter and item owner must be equal.372        MustBeTokenOwner,373        /// Item balance not enough.374        TokenValueTooLow,375        /// Size of item is too large.376        NftSizeLimitExceeded,377        /// No approve found378        ApproveNotFound,379        /// Requested value more than approved.380        TokenValueNotEnough,381        /// Only approved addresses can call this method.382        ApproveRequired,383        /// Address is not in white list.384        AddresNotInWhiteList,385        /// Number of collection admins bound exceeded.386        CollectionAdminsLimitExceeded,387        /// Owned tokens by a single address bound exceeded.388        AddressOwnershipLimitExceeded,389        /// Length of items properties must be greater than 0.390        EmptyArgument,391        /// const_data exceeded data limit.392        TokenConstDataLimitExceeded,393        /// variable_data exceeded data limit.394        TokenVariableDataLimitExceeded,395        /// Not NFT item data used to mint in NFT collection.396        NotNftDataUsedToMintNftCollectionToken,397        /// Not Fungible item data used to mint in Fungible collection.398        NotFungibleDataUsedToMintFungibleCollectionToken,399        /// Not Re Fungible item data used to mint in Re Fungible collection.400        NotReFungibleDataUsedToMintReFungibleCollectionToken,401        /// Unexpected collection type.402        UnexpectedCollectionType,403        /// Can't store metadata in fungible tokens.404        CantStoreMetadataInFungibleTokens,405        /// Collection token limit exceeded406        CollectionTokenLimitExceeded,407        /// Account token limit exceeded per collection408        AccountTokenLimitExceeded,409        /// Collection limit bounds per collection exceeded410        CollectionLimitBoundsExceeded,411        /// Tried to enable permissions which are only permitted to be disabled412        OwnerPermissionsCantBeReverted,413        /// Schema data size limit bound exceeded414        SchemaDataLimitExceeded,415        /// Maximum refungibility exceeded416        WrongRefungiblePieces417	}418}419420pub trait Config: system::Config + Sized + pallet_transaction_payment::Config + pallet_contracts::Config {421    type Event: From<Event<Self>> + Into<<Self as system::Config>::Event>;422423    /// Weight information for extrinsics in this pallet.424	type WeightInfo: WeightInfo;425}426427#[cfg(feature = "runtime-benchmarks")]428mod benchmarking;429430// #endregion431432decl_storage! {433    trait Store for Module<T: Config> as Nft {434435        // Private members436        NextCollectionID: CollectionId;437        CreatedCollectionCount: u32;438        ChainVersion: u64;439        ItemListIndex: map hasher(identity) CollectionId => TokenId;440441        // Chain limits struct442        pub ChainLimit get(fn chain_limit) config(): ChainLimits;443444        // Bound counters445        CollectionCount: u32;446        pub AccountItemCount get(fn account_item_count): map hasher(twox_64_concat) T::AccountId => u32;447448        // Basic collections449        pub CollectionById get(fn collection_id) config(): map hasher(identity) CollectionId => Option<Collection<T>> = None;450        pub AdminList get(fn admin_list_collection): map hasher(identity) CollectionId => Vec<T::AccountId>;451        pub WhiteList get(fn white_list): double_map hasher(identity) CollectionId, hasher(twox_64_concat) T::AccountId => bool;452453        /// Balance owner per collection map454        pub Balance get(fn balance_count): double_map hasher(identity) CollectionId, hasher(twox_64_concat) T::AccountId => u128;455456        /// second parameter: item id + owner account id + spender account id457        pub Allowances get(fn approved): double_map hasher(identity) CollectionId, hasher(twox_64_concat) (TokenId, T::AccountId, T::AccountId) => u128;458459        /// Item collections460        pub NftItemList get(fn nft_item_id) config(): double_map hasher(identity) CollectionId, hasher(identity) TokenId => NftItemType<T::AccountId>;461        pub FungibleItemList get(fn fungible_item_id) config(): double_map hasher(identity) CollectionId, hasher(twox_64_concat) T::AccountId => FungibleItemType;462        pub ReFungibleItemList get(fn refungible_item_id) config(): double_map hasher(identity) CollectionId, hasher(identity) TokenId => ReFungibleItemType<T::AccountId>;463464        /// Index list465        pub AddressTokens get(fn address_tokens): double_map hasher(identity) CollectionId, hasher(twox_64_concat) T::AccountId => Vec<TokenId>;466467        /// Tokens transfer baskets468        pub CreateItemBasket get(fn create_item_basket): map hasher(twox_64_concat) (CollectionId, T::AccountId) => T::BlockNumber;469        pub NftTransferBasket get(fn nft_transfer_basket): double_map hasher(identity) CollectionId, hasher(identity) TokenId => T::BlockNumber;470        pub FungibleTransferBasket get(fn fungible_transfer_basket): double_map hasher(identity) CollectionId, hasher(twox_64_concat) T::AccountId => T::BlockNumber;471        pub ReFungibleTransferBasket get(fn refungible_transfer_basket): double_map hasher(identity) CollectionId, hasher(identity) TokenId => T::BlockNumber;472473        /// Variable metadata sponsoring474        pub VariableMetaDataBasket get(fn variable_meta_data_basket): double_map hasher(identity) CollectionId, hasher(identity) TokenId => Option<T::BlockNumber> = None;475476        // Contract Sponsorship and Ownership477        pub ContractOwner get(fn contract_owner): map hasher(twox_64_concat) T::AccountId => T::AccountId;478        pub ContractSelfSponsoring get(fn contract_self_sponsoring): map hasher(twox_64_concat) T::AccountId => bool;479        pub ContractSponsorBasket get(fn contract_sponsor_basket): map hasher(twox_64_concat) (T::AccountId, T::AccountId) => T::BlockNumber;480        pub ContractSponsoringRateLimit get(fn contract_sponsoring_rate_limit): map hasher(twox_64_concat) T::AccountId => T::BlockNumber;481        pub ContractWhiteListEnabled get(fn contract_white_list_enabled): map hasher(twox_64_concat) T::AccountId => bool; 482        pub ContractWhiteList get(fn contract_white_list): double_map hasher(twox_64_concat) T::AccountId, hasher(twox_64_concat) T::AccountId => bool; 483    }484    add_extra_genesis {485        build(|config: &GenesisConfig<T>| {486            // Modification of storage487            for (_num, _c) in &config.collection_id {488                <Module<T>>::init_collection(_c);489            }490491            for (_num, _c, _i) in &config.nft_item_id {492                <Module<T>>::init_nft_token(*_c, _i);493            }494495            for (collection_id, account_id, fungible_item) in &config.fungible_item_id {496                <Module<T>>::init_fungible_token(*collection_id, account_id, fungible_item);497            }498499            for (_num, _c, _i) in &config.refungible_item_id {500                <Module<T>>::init_refungible_token(*_c, _i);501            }502        })503    }504}505506decl_event!(507    pub enum Event<T>508    where509        AccountId = <T as system::Config>::AccountId,510    {511        /// New collection was created512        /// 513        /// # Arguments514        /// 515        /// * collection_id: Globally unique identifier of newly created collection.516        /// 517        /// * mode: [CollectionMode] converted into u8.518        /// 519        /// * account_id: Collection owner.520        Created(CollectionId, u8, AccountId),521522        /// New item was created.523        /// 524        /// # Arguments525        /// 526        /// * collection_id: Id of the collection where item was created.527        /// 528        /// * item_id: Id of an item. Unique within the collection.529        ///530        /// * recipient: Owner of newly created item 531        ItemCreated(CollectionId, TokenId, AccountId),532533        /// Collection item was burned.534        /// 535        /// # Arguments536        /// 537        /// collection_id.538        /// 539        /// item_id: Identifier of burned NFT.540        ItemDestroyed(CollectionId, TokenId),541542        /// Item was transferred543        ///544        /// * collection_id: Id of collection to which item is belong545        ///546        /// * item_id: Id of an item547        ///548        /// * sender: Original owner of item549        ///550        /// * recipient: New owner of item551        ///552        /// * amount: Always 1 for NFT553        Transfer(CollectionId, TokenId, AccountId, AccountId, u128),554    }555);556557decl_module! {558    pub struct Module<T: Config> for enum Call 559    where 560        origin: T::Origin561    {562        fn deposit_event() = default;563        type Error = Error<T>;564565        fn on_initialize(now: T::BlockNumber) -> Weight {566567            if ChainVersion::get() < 2568            {569                let value = NextCollectionID::get();570                CreatedCollectionCount::put(value);571                ChainVersion::put(2);572            }573574            0575        }576577        /// 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.578        /// 579        /// # Permissions580        /// 581        /// * Anyone.582        /// 583        /// # Arguments584        /// 585        /// * collection_name: UTF-16 string with collection name (limit 64 characters), will be stored as zero-terminated.586        /// 587        /// * collection_description: UTF-16 string with collection description (limit 256 characters), will be stored as zero-terminated.588        /// 589        /// * token_prefix: UTF-8 string with token prefix.590        /// 591        /// * mode: [CollectionMode] collection type and type dependent data.592        // returns collection ID593        #[weight = <T as Config>::WeightInfo::create_collection()]594        pub fn create_collection(origin,595                                 collection_name: Vec<u16>,596                                 collection_description: Vec<u16>,597                                 token_prefix: Vec<u8>,598                                 mode: CollectionMode) -> DispatchResult {599600            // Anyone can create a collection601            let who = ensure_signed(origin)?;602603            let decimal_points = match mode {604                CollectionMode::Fungible(points) => points,605                _ => 0606            };607608            let chain_limit = ChainLimit::get();609610            // bound Total number of collections611            ensure!(CollectionCount::get() < chain_limit.collection_numbers_limit, Error::<T>::TotalCollectionsLimitExceeded);612613            // check params614            ensure!(decimal_points <= MAX_DECIMAL_POINTS, Error::<T>::CollectionDecimalPointLimitExceeded);615            ensure!(collection_name.len() <= 64, Error::<T>::CollectionNameLimitExceeded);616            ensure!(collection_description.len() <= 256, Error::<T>::CollectionDescriptionLimitExceeded);617            ensure!(token_prefix.len() <= 16, Error::<T>::CollectionTokenPrefixLimitExceeded);618619            // Generate next collection ID620            let next_id = CreatedCollectionCount::get()621                .checked_add(1)622                .ok_or(Error::<T>::NumOverflow)?;623624            // bound counter625            let total = CollectionCount::get()626                .checked_add(1)627                .ok_or(Error::<T>::NumOverflow)?;628629            CreatedCollectionCount::put(next_id);630            CollectionCount::put(total);631632            let limits = CollectionLimits {633                sponsored_data_size: chain_limit.custom_data_limit,634                ..Default::default()635            };636637            // Create new collection638            let new_collection = Collection {639                owner: who.clone(),640                name: collection_name,641                mode: mode.clone(),642                mint_mode: false,643                access: AccessMode::Normal,644                description: collection_description,645                decimal_points: decimal_points,646                token_prefix: token_prefix,647                offchain_schema: Vec::new(),648                schema_version: SchemaVersion::ImageURL,649                sponsor: T::AccountId::default(),650                sponsor_confirmed: false,651                variable_on_chain_schema: Vec::new(),652                const_on_chain_schema: Vec::new(),653                limits,654            };655656            // Add new collection to map657            <CollectionById<T>>::insert(next_id, new_collection);658659            // call event660            Self::deposit_event(RawEvent::Created(next_id, mode.into(), who.clone()));661662            Ok(())663        }664665        /// **DANGEROUS**: Destroys collection and all NFTs within this collection. Users irrecoverably lose their assets and may lose real money.666        /// 667        /// # Permissions668        /// 669        /// * Collection Owner.670        /// 671        /// # Arguments672        /// 673        /// * collection_id: collection to destroy.674        #[weight = <T as Config>::WeightInfo::destroy_collection()]675        pub fn destroy_collection(origin, collection_id: CollectionId) -> DispatchResult {676677            let sender = ensure_signed(origin)?;678            let collection = Self::get_collection(collection_id)?;679            Self::check_owner_permissions(&collection, sender)?;680            if !collection.limits.owner_can_destroy {681                fail!(Error::<T>::NoPermission);682            }683684            <AddressTokens<T>>::remove_prefix(collection_id);685            <Allowances<T>>::remove_prefix(collection_id);686            <Balance<T>>::remove_prefix(collection_id);687            <ItemListIndex>::remove(collection_id);688            <AdminList<T>>::remove(collection_id);689            <CollectionById<T>>::remove(collection_id);690            <WhiteList<T>>::remove_prefix(collection_id);691692            <NftItemList<T>>::remove_prefix(collection_id);693            <FungibleItemList<T>>::remove_prefix(collection_id);694            <ReFungibleItemList<T>>::remove_prefix(collection_id);695696            <NftTransferBasket<T>>::remove_prefix(collection_id);697            <FungibleTransferBasket<T>>::remove_prefix(collection_id);698            <ReFungibleTransferBasket<T>>::remove_prefix(collection_id);699700            <VariableMetaDataBasket<T>>::remove_prefix(collection_id);701702            if CollectionCount::get() > 0703            {704                // bound couter705                let total = CollectionCount::get()706                    .checked_sub(1)707                    .ok_or(Error::<T>::NumOverflow)?;708709                CollectionCount::put(total);710            }711712            Ok(())713        }714715        /// Add an address to white list.716        /// 717        /// # Permissions718        /// 719        /// * Collection Owner720        /// * Collection Admin721        /// 722        /// # Arguments723        /// 724        /// * collection_id.725        /// 726        /// * address.727        #[weight = <T as Config>::WeightInfo::add_to_white_list()]728        pub fn add_to_white_list(origin, collection_id: CollectionId, address: T::AccountId) -> DispatchResult{729730            let sender = ensure_signed(origin)?;731            let collection = Self::get_collection(collection_id)?;732            Self::check_owner_or_admin_permissions(&collection, sender)?;733734            <WhiteList<T>>::insert(collection_id, address, true);735            736            Ok(())737        }738739        /// Remove an address from white list.740        /// 741        /// # Permissions742        /// 743        /// * Collection Owner744        /// * Collection Admin745        /// 746        /// # Arguments747        /// 748        /// * collection_id.749        /// 750        /// * address.751        #[weight = <T as Config>::WeightInfo::remove_from_white_list()]752        pub fn remove_from_white_list(origin, collection_id: CollectionId, address: T::AccountId) -> DispatchResult{753754            let sender = ensure_signed(origin)?;755            let collection = Self::get_collection(collection_id)?;756            Self::check_owner_or_admin_permissions(&collection, sender)?;757758            <WhiteList<T>>::remove(collection_id, address);759760            Ok(())761        }762763        /// Toggle between normal and white list access for the methods with access for `Anyone`.764        /// 765        /// # Permissions766        /// 767        /// * Collection Owner.768        /// 769        /// # Arguments770        /// 771        /// * collection_id.772        /// 773        /// * mode: [AccessMode]774        #[weight = <T as Config>::WeightInfo::set_public_access_mode()]775        pub fn set_public_access_mode(origin, collection_id: CollectionId, mode: AccessMode) -> DispatchResult776        {777            let sender = ensure_signed(origin)?;778779            let mut target_collection = Self::get_collection(collection_id)?;780            Self::check_owner_permissions(&target_collection, sender)?;781            target_collection.access = mode;782            Self::save_collection(target_collection);783784            Ok(())785        }786787        /// Allows Anyone to create tokens if:788        /// * White List is enabled, and789        /// * Address is added to white list, and790        /// * This method was called with True parameter791        /// 792        /// # Permissions793        /// * Collection Owner794        ///795        /// # Arguments796        /// 797        /// * collection_id.798        /// 799        /// * mint_permission: Boolean parameter. If True, allows minting to Anyone with conditions above.800        #[weight = <T as Config>::WeightInfo::set_mint_permission()]801        pub fn set_mint_permission(origin, collection_id: CollectionId, mint_permission: bool) -> DispatchResult802        {803            let sender = ensure_signed(origin)?;804805            let mut target_collection = Self::get_collection(collection_id)?;806            Self::check_owner_permissions(&target_collection, sender)?;807            target_collection.mint_mode = mint_permission;808            Self::save_collection(target_collection);809810            Ok(())811        }812813        /// Change the owner of the collection.814        /// 815        /// # Permissions816        /// 817        /// * Collection Owner.818        /// 819        /// # Arguments820        /// 821        /// * collection_id.822        /// 823        /// * new_owner.824        #[weight = <T as Config>::WeightInfo::change_collection_owner()]825        pub fn change_collection_owner(origin, collection_id: CollectionId, new_owner: T::AccountId) -> DispatchResult {826827            let sender = ensure_signed(origin)?;828            let mut target_collection = Self::get_collection(collection_id)?;829            Self::check_owner_permissions(&target_collection, sender)?;830            target_collection.owner = new_owner;831            Self::save_collection(target_collection);832833            Ok(())834        }835836        /// Adds an admin of the Collection.837        /// 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. 838        /// 839        /// # Permissions840        /// 841        /// * Collection Owner.842        /// * Collection Admin.843        /// 844        /// # Arguments845        /// 846        /// * collection_id: ID of the Collection to add admin for.847        /// 848        /// * new_admin_id: Address of new admin to add.849        #[weight = <T as Config>::WeightInfo::add_collection_admin()]850        pub fn add_collection_admin(origin, collection_id: CollectionId, new_admin_id: T::AccountId) -> DispatchResult {851852            let sender = ensure_signed(origin)?;853            let collection = Self::get_collection(collection_id)?;854            Self::check_owner_or_admin_permissions(&collection, sender)?;855            let mut admin_arr: Vec<T::AccountId> = Vec::new();856857            if <AdminList<T>>::contains_key(collection_id)858            {859                admin_arr = <AdminList<T>>::get(collection_id);860                ensure!(!admin_arr.contains(&new_admin_id), Error::<T>::AlreadyAdmin);861            }862863            // Number of collection admins864            ensure!((admin_arr.len() as u64) < ChainLimit::get().collections_admins_limit, Error::<T>::CollectionAdminsLimitExceeded);865866            admin_arr.push(new_admin_id);867            <AdminList<T>>::insert(collection_id, admin_arr);868869            Ok(())870        }871872        /// 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.873        ///874        /// # Permissions875        /// 876        /// * Collection Owner.877        /// * Collection Admin.878        /// 879        /// # Arguments880        /// 881        /// * collection_id: ID of the Collection to remove admin for.882        /// 883        /// * account_id: Address of admin to remove.884        #[weight = <T as Config>::WeightInfo::remove_collection_admin()]885        pub fn remove_collection_admin(origin, collection_id: CollectionId, account_id: T::AccountId) -> DispatchResult {886887            let sender = ensure_signed(origin)?;888            let collection = Self::get_collection(collection_id)?;889            Self::check_owner_or_admin_permissions(&collection, sender)?;890            ensure!(<AdminList<T>>::contains_key(collection_id), Error::<T>::AdminNotFound);891892            let mut admin_arr = <AdminList<T>>::get(collection_id);893            admin_arr.retain(|i| *i != account_id);894            <AdminList<T>>::insert(collection_id, admin_arr);895896            Ok(())897        }898899        /// # Permissions900        /// 901        /// * Collection Owner902        /// 903        /// # Arguments904        /// 905        /// * collection_id.906        /// 907        /// * new_sponsor.908        #[weight = <T as Config>::WeightInfo::set_collection_sponsor()]909        pub fn set_collection_sponsor(origin, collection_id: CollectionId, new_sponsor: T::AccountId) -> DispatchResult {910911            let sender = ensure_signed(origin)?;912            let mut target_collection = Self::get_collection(collection_id)?;913            Self::check_owner_permissions(&target_collection, sender)?;914915            target_collection.sponsor = new_sponsor;916            target_collection.sponsor_confirmed = false;917            Self::save_collection(target_collection);918919            Ok(())920        }921922        /// # Permissions923        /// 924        /// * Sponsor.925        /// 926        /// # Arguments927        /// 928        /// * collection_id.929        #[weight = <T as Config>::WeightInfo::confirm_sponsorship()]930        pub fn confirm_sponsorship(origin, collection_id: CollectionId) -> DispatchResult {931932            let sender = ensure_signed(origin)?;933934            let mut target_collection = Self::get_collection(collection_id)?;935            ensure!(sender == target_collection.sponsor, Error::<T>::ConfirmUnsetSponsorFail);936937            target_collection.sponsor_confirmed = true;938            Self::save_collection(target_collection);939940            Ok(())941        }942943        /// Switch back to pay-per-own-transaction model.944        ///945        /// # Permissions946        ///947        /// * Collection owner.948        /// 949        /// # Arguments950        /// 951        /// * collection_id.952        #[weight = <T as Config>::WeightInfo::remove_collection_sponsor()]953        pub fn remove_collection_sponsor(origin, collection_id: CollectionId) -> DispatchResult {954955            let sender = ensure_signed(origin)?;956957            let mut target_collection = Self::get_collection(collection_id)?;958            Self::check_owner_permissions(&target_collection, sender)?;959960            target_collection.sponsor = T::AccountId::default();961            target_collection.sponsor_confirmed = false;962            Self::save_collection(target_collection);963964            Ok(())965        }966967        /// This method creates a concrete instance of NFT Collection created with CreateCollection method.968        /// 969        /// # Permissions970        /// 971        /// * Collection Owner.972        /// * Collection Admin.973        /// * Anyone if974        ///     * White List is enabled, and975        ///     * Address is added to white list, and976        ///     * MintPermission is enabled (see SetMintPermission method)977        /// 978        /// # Arguments979        /// 980        /// * collection_id: ID of the collection.981        /// 982        /// * owner: Address, initial owner of the NFT.983        ///984        /// * data: Token data to store on chain.985        // #[weight =986        // (130_000_000 as Weight)987        // .saturating_add((2135 as Weight).saturating_mul((properties.len() as u64) as Weight))988        // .saturating_add(RocksDbWeight::get().reads(10 as Weight))989        // .saturating_add(RocksDbWeight::get().writes(8 as Weight))]990991        #[weight = <T as Config>::WeightInfo::create_item(data.len())]992        pub fn create_item(origin, collection_id: CollectionId, owner: T::AccountId, data: CreateItemData) -> DispatchResult {993994            let sender = ensure_signed(origin)?;995996            let target_collection = Self::get_collection(collection_id)?;997998            Self::can_create_items_in_collection(&target_collection, &sender, &owner, 1)?;999            Self::validate_create_item_args(&target_collection, &data)?;1000            Self::create_item_no_validation(&target_collection, owner, data)?;10011002            Ok(())1003        }10041005        /// This method creates multiple instances of NFT Collection created with CreateCollection method.1006        /// 1007        /// # Permissions1008        /// 1009        /// * Collection Owner.1010        /// * Collection Admin.1011        /// * Anyone if1012        ///     * White List is enabled, and1013        ///     * Address is added to white list, and1014        ///     * MintPermission is enabled (see SetMintPermission method)1015        /// 1016        /// # Arguments1017        /// 1018        /// * collection_id: ID of the collection.1019        /// 1020        /// * itemsData: Array items properties. Each property is an array of bytes itself, see [create_item].1021        /// 1022        /// * owner: Address, initial owner of the NFT.1023        #[weight = <T as Config>::WeightInfo::create_item(items_data.into_iter()1024                               .map(|data| { data.len() })1025                               .sum())]1026        pub fn create_multiple_items(origin, collection_id: CollectionId, owner: T::AccountId, items_data: Vec<CreateItemData>) -> DispatchResult {10271028            ensure!(items_data.len() > 0, Error::<T>::EmptyArgument);1029            let sender = ensure_signed(origin)?;10301031            let target_collection = Self::get_collection(collection_id)?;10321033            Self::can_create_items_in_collection(&target_collection, &sender, &owner, items_data.len() as u32)?;10341035            for data in &items_data {1036                Self::validate_create_item_args(&target_collection, data)?;1037            }1038            for data in &items_data {1039                Self::create_item_no_validation(&target_collection, owner.clone(), data.clone())?;1040            }10411042            Ok(())1043        }10441045        /// Destroys a concrete instance of NFT.1046        /// 1047        /// # Permissions1048        /// 1049        /// * Collection Owner.1050        /// * Collection Admin.1051        /// * Current NFT Owner.1052        /// 1053        /// # Arguments1054        /// 1055        /// * collection_id: ID of the collection.1056        /// 1057        /// * item_id: ID of NFT to burn.1058        #[weight = <T as Config>::WeightInfo::burn_item()]1059        pub fn burn_item(origin, collection_id: CollectionId, item_id: TokenId, value: u128) -> DispatchResult {10601061            let sender = ensure_signed(origin)?;10621063            // Transfer permissions check1064            let target_collection = Self::get_collection(collection_id)?;1065            ensure!(1066                Self::is_item_owner(sender.clone(), &target_collection, item_id) ||1067                (1068                    target_collection.limits.owner_can_transfer &&1069                    Self::is_owner_or_admin_permissions(&target_collection, sender.clone())1070                ),1071                Error::<T>::NoPermission1072            );10731074            if target_collection.access == AccessMode::WhiteList {1075                Self::check_white_list(&target_collection, &sender)?;1076            }10771078            match target_collection.mode1079            {1080                CollectionMode::NFT => Self::burn_nft_item(&target_collection, item_id)?,1081                CollectionMode::Fungible(_)  => Self::burn_fungible_item(&sender, &target_collection, value)?,1082                CollectionMode::ReFungible  => Self::burn_refungible_item(&target_collection, item_id, &sender)?,1083                _ => ()1084            };10851086            // call event1087            Self::deposit_event(RawEvent::ItemDestroyed(target_collection.id, item_id));10881089            Ok(())1090        }10911092        /// Change ownership of the token.1093        /// 1094        /// # Permissions1095        /// 1096        /// * Collection Owner1097        /// * Collection Admin1098        /// * Current NFT owner1099        ///1100        /// # Arguments1101        /// 1102        /// * recipient: Address of token recipient.1103        /// 1104        /// * collection_id.1105        /// 1106        /// * item_id: ID of the item1107        ///     * Non-Fungible Mode: Required.1108        ///     * Fungible Mode: Ignored.1109        ///     * Re-Fungible Mode: Required.1110        /// 1111        /// * value: Amount to transfer.1112        ///     * Non-Fungible Mode: Ignored1113        ///     * Fungible Mode: Must specify transferred amount1114        ///     * Re-Fungible Mode: Must specify transferred portion (between 0 and 1)1115        #[weight = <T as Config>::WeightInfo::transfer()]1116        pub fn transfer(origin, recipient: T::AccountId, collection_id: CollectionId, item_id: TokenId, value: u128) -> DispatchResult {1117            let sender = ensure_signed(origin)?;1118            let collection = Self::get_collection(collection_id)?;11191120            Self::transfer_internal(sender, recipient, &collection, item_id, value)1121        }11221123        /// Set, change, or remove approved address to transfer the ownership of the NFT.1124        /// 1125        /// # Permissions1126        /// 1127        /// * Collection Owner1128        /// * Collection Admin1129        /// * Current NFT owner1130        /// 1131        /// # Arguments1132        /// 1133        /// * approved: Address that is approved to transfer this NFT or zero (if needed to remove approval).1134        /// 1135        /// * collection_id.1136        /// 1137        /// * item_id: ID of the item.1138        #[weight = <T as Config>::WeightInfo::approve()]1139        pub fn approve(origin, spender: T::AccountId, collection_id: CollectionId, item_id: TokenId, amount: u128) -> DispatchResult {11401141            let sender = ensure_signed(origin)?;1142            let target_collection = Self::get_collection(collection_id)?;11431144            Self::token_exists(&target_collection, item_id, &sender)?;11451146            // Transfer permissions check1147            let bypasses_limits = target_collection.limits.owner_can_transfer &&1148                Self::is_owner_or_admin_permissions(1149                    &target_collection,1150                    sender.clone(),1151                );11521153            let allowance_limit = if bypasses_limits {1154                None1155            } else if let Some(amount) = Self::owned_amount(1156                sender.clone(),1157                &target_collection,1158                item_id,1159            ) {1160                Some(amount)1161            } else {1162                fail!(Error::<T>::NoPermission);1163            };11641165            if target_collection.access == AccessMode::WhiteList {1166                Self::check_white_list(&target_collection, &sender)?;1167                Self::check_white_list(&target_collection, &spender)?;1168            }11691170            let allowance_exists = <Allowances<T>>::contains_key(collection_id, (item_id, &sender, &spender));1171            let mut allowance: u128 = amount;1172            if allowance_exists {1173                allowance += <Allowances<T>>::get(collection_id, (item_id, &sender, &spender));1174            }1175            if let Some(limit) = allowance_limit {1176                ensure!(limit >= allowance, Error::<T>::TokenValueTooLow);1177            }1178            <Allowances<T>>::insert(collection_id, (item_id, sender.clone(), spender.clone()), allowance);11791180            Ok(())1181        }1182        1183        /// 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.1184        /// 1185        /// # Permissions1186        /// * Collection Owner1187        /// * Collection Admin1188        /// * Current NFT owner1189        /// * Address approved by current NFT owner1190        /// 1191        /// # Arguments1192        /// 1193        /// * from: Address that owns token.1194        /// 1195        /// * recipient: Address of token recipient.1196        /// 1197        /// * collection_id.1198        /// 1199        /// * item_id: ID of the item.1200        /// 1201        /// * value: Amount to transfer.1202        #[weight = <T as Config>::WeightInfo::transfer_from()]1203        pub fn transfer_from(origin, from: T::AccountId, recipient: T::AccountId, collection_id: CollectionId, item_id: TokenId, value: u128 ) -> DispatchResult {12041205            let sender = ensure_signed(origin)?;1206            let target_collection = Self::get_collection(collection_id)?;12071208            let mut appoved_transfer = false;12091210            // Check approval1211            let mut approval: u128 = 0;1212            if <Allowances<T>>::contains_key(collection_id, (item_id, &from, &sender)) {1213                approval = <Allowances<T>>::get(collection_id, (item_id, &from, &sender));1214                ensure!(approval >= value, Error::<T>::TokenValueNotEnough);1215                appoved_transfer = true;1216            }12171218            // Limits check1219            Self::is_correct_transfer(&target_collection, &recipient)?;12201221            // Transfer permissions check         1222            ensure!(1223                appoved_transfer || 1224                (1225                    target_collection.limits.owner_can_transfer &&1226                    Self::is_owner_or_admin_permissions(&target_collection, sender.clone())1227                ),1228                Error::<T>::NoPermission1229            );12301231            if target_collection.access == AccessMode::WhiteList {1232                Self::check_white_list(&target_collection, &sender)?;1233                Self::check_white_list(&target_collection, &recipient)?;1234            }12351236            // Reduce approval by transferred amount or remove if remaining approval drops to 01237            if approval.checked_sub(value).unwrap_or(0) > 0 {1238                <Allowances<T>>::insert(collection_id, (item_id, &from, &sender), approval - value);1239            }1240            else {1241                <Allowances<T>>::remove(collection_id, (item_id, &from, &sender));1242            }12431244            match target_collection.mode1245            {1246                CollectionMode::NFT => Self::transfer_nft(&target_collection, item_id, from, recipient)?,1247                CollectionMode::Fungible(_)  => Self::transfer_fungible(&target_collection, value, &from, &recipient)?,1248                CollectionMode::ReFungible  => Self::transfer_refungible(&target_collection, item_id, value, from.clone(), recipient)?,1249                _ => ()1250            };12511252            Ok(())1253        }12541255        // #[weight = 0]1256        // pub fn safe_transfer_from(origin, collection_id: CollectionId, item_id: TokenId, new_owner: T::AccountId) -> DispatchResult {12571258        //     // let no_perm_mes = "You do not have permissions to modify this collection";1259        //     // ensure!(<ApprovedList<T>>::contains_key((collection_id, item_id)), no_perm_mes);1260        //     // let list_itm = <ApprovedList<T>>::get((collection_id, item_id));1261        //     // ensure!(list_itm.contains(&new_owner.clone()), no_perm_mes);12621263        //     // // on_nft_received  call12641265        //     // Self::transfer(origin, collection_id, item_id, new_owner)?;12661267        //     Ok(())1268        // }12691270        /// Set off-chain data schema.1271        /// 1272        /// # Permissions1273        /// 1274        /// * Collection Owner1275        /// * Collection Admin1276        /// 1277        /// # Arguments1278        /// 1279        /// * collection_id.1280        /// 1281        /// * schema: String representing the offchain data schema.1282        #[weight = <T as Config>::WeightInfo::set_variable_meta_data()]1283        pub fn set_variable_meta_data (1284            origin,1285            collection_id: CollectionId,1286            item_id: TokenId,1287            data: Vec<u8>1288        ) -> DispatchResult {1289            let sender = ensure_signed(origin)?;1290            1291            let target_collection = Self::get_collection(collection_id)?;1292            Self::token_exists(&target_collection, item_id, &sender)?;12931294            ensure!(ChainLimit::get().custom_data_limit >= data.len() as u32, Error::<T>::TokenVariableDataLimitExceeded);12951296            // Modify permissions check1297            ensure!(Self::is_item_owner(sender.clone(), &target_collection, item_id) ||1298                Self::is_owner_or_admin_permissions(&target_collection, sender.clone()),1299                Error::<T>::NoPermission);13001301            match target_collection.mode1302            {1303                CollectionMode::NFT => Self::set_nft_variable_data(&target_collection, item_id, data)?,1304                CollectionMode::ReFungible  => Self::set_re_fungible_variable_data(&target_collection, item_id, data)?,1305                CollectionMode::Fungible(_) => fail!(Error::<T>::CantStoreMetadataInFungibleTokens),1306                _ => fail!(Error::<T>::UnexpectedCollectionType)1307            };13081309            Ok(())1310        }1311 1312        /// Set schema standard1313        /// ImageURL1314        /// Unique1315        /// 1316        /// # Permissions1317        /// 1318        /// * Collection Owner1319        /// * Collection Admin1320        /// 1321        /// # Arguments1322        /// 1323        /// * collection_id.1324        /// 1325        /// * schema: SchemaVersion: enum1326        #[weight = <T as Config>::WeightInfo::set_schema_version()]1327        pub fn set_schema_version(1328            origin,1329            collection_id: CollectionId,1330            version: SchemaVersion1331        ) -> DispatchResult {1332            let sender = ensure_signed(origin)?;1333            let mut target_collection = Self::get_collection(collection_id)?;1334            Self::check_owner_or_admin_permissions(&target_collection, sender.clone())?;1335            target_collection.schema_version = version;1336            Self::save_collection(target_collection);13371338            Ok(())1339        }13401341        /// Set off-chain data schema.1342        /// 1343        /// # Permissions1344        /// 1345        /// * Collection Owner1346        /// * Collection Admin1347        /// 1348        /// # Arguments1349        /// 1350        /// * collection_id.1351        /// 1352        /// * schema: String representing the offchain data schema.1353        #[weight = <T as Config>::WeightInfo::set_offchain_schema()]1354        pub fn set_offchain_schema(1355            origin,1356            collection_id: CollectionId,1357            schema: Vec<u8>1358        ) -> DispatchResult {1359            let sender = ensure_signed(origin)?;1360            let mut target_collection = Self::get_collection(collection_id)?;1361            Self::check_owner_or_admin_permissions(&target_collection, sender.clone())?;13621363            // check schema limit1364            ensure!(schema.len() as u32 <= ChainLimit::get().offchain_schema_limit, "");13651366            target_collection.offchain_schema = schema;1367            Self::save_collection(target_collection);13681369            Ok(())1370        }13711372        /// Set const on-chain data schema.1373        /// 1374        /// # Permissions1375        /// 1376        /// * Collection Owner1377        /// * Collection Admin1378        /// 1379        /// # Arguments1380        /// 1381        /// * collection_id.1382        /// 1383        /// * schema: String representing the const on-chain data schema.1384        #[weight = <T as Config>::WeightInfo::set_const_on_chain_schema()]1385        pub fn set_const_on_chain_schema (1386            origin,1387            collection_id: CollectionId,1388            schema: Vec<u8>1389        ) -> DispatchResult {1390            let sender = ensure_signed(origin)?;1391            let mut target_collection = Self::get_collection(collection_id)?;1392            Self::check_owner_or_admin_permissions(&target_collection, sender.clone())?;13931394            // check schema limit1395            ensure!(schema.len() as u32 <= ChainLimit::get().const_on_chain_schema_limit, "");13961397            target_collection.const_on_chain_schema = schema;1398            Self::save_collection(target_collection);13991400            Ok(())1401        }14021403        /// Set variable on-chain data schema.1404        /// 1405        /// # Permissions1406        /// 1407        /// * Collection Owner1408        /// * Collection Admin1409        /// 1410        /// # Arguments1411        /// 1412        /// * collection_id.1413        /// 1414        /// * schema: String representing the variable on-chain data schema.1415        #[weight = <T as Config>::WeightInfo::set_const_on_chain_schema()]1416        pub fn set_variable_on_chain_schema (1417            origin,1418            collection_id: CollectionId,1419            schema: Vec<u8>1420        ) -> DispatchResult {1421            let sender = ensure_signed(origin)?;1422            let mut target_collection = Self::get_collection(collection_id)?;1423            Self::check_owner_or_admin_permissions(&target_collection, sender.clone())?;14241425            // check schema limit1426            ensure!(schema.len() as u32 <= ChainLimit::get().variable_on_chain_schema_limit, "");14271428            target_collection.variable_on_chain_schema = schema;1429            Self::save_collection(target_collection);14301431            Ok(())1432        }14331434        // Sudo permissions function1435        #[weight = <T as Config>::WeightInfo::set_chain_limits()]1436        pub fn set_chain_limits(1437            origin,1438            limits: ChainLimits1439        ) -> DispatchResult {14401441            #[cfg(not(feature = "runtime-benchmarks"))]1442            ensure_root(origin)?;14431444            <ChainLimit>::put(limits);1445            Ok(())1446        }14471448        /// Enable smart contract self-sponsoring.1449        /// 1450        /// # Permissions1451        /// 1452        /// * Contract Owner1453        /// 1454        /// # Arguments1455        /// 1456        /// * contract address1457        /// * enable flag1458        /// 1459        #[weight = <T as Config>::WeightInfo::enable_contract_sponsoring()]1460        pub fn enable_contract_sponsoring(1461            origin,1462            contract_address: T::AccountId,1463            enable: bool1464        ) -> DispatchResult {14651466            let sender = ensure_signed(origin)?;14671468            #[cfg(feature = "runtime-benchmarks")]1469            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());14701471            Self::ensure_contract_owned(sender, &contract_address)?;14721473            <ContractSelfSponsoring<T>>::insert(contract_address, enable);1474            Ok(())1475        }14761477        /// Set the rate limit for contract sponsoring to specified number of blocks.1478        /// 1479        /// If not set (has the default value of 0 blocks), the sponsoring will be disabled. 1480        /// If set to the number B (for blocks), the transactions will be sponsored with a rate 1481        /// limit of B, i.e. fees for every transaction sent to this smart contract will be paid 1482        /// from contract endowment if there are at least B blocks between such transactions. 1483        /// Nonetheless, if transactions are sent more frequently, the fees are paid by the sender.1484        /// 1485        /// # Permissions1486        /// 1487        /// * Contract Owner1488        /// 1489        /// # Arguments1490        /// 1491        /// -`contract_address`: Address of the contract to sponsor1492        /// -`rate_limit`: Number of blocks to wait until the next sponsored transaction is allowed1493        /// 1494        #[weight = <T as Config>::WeightInfo::set_contract_sponsoring_rate_limit()]1495        pub fn set_contract_sponsoring_rate_limit(1496            origin,1497            contract_address: T::AccountId,1498            rate_limit: T::BlockNumber1499        ) -> DispatchResult {1500            let sender = ensure_signed(origin)?;15011502            #[cfg(feature = "runtime-benchmarks")]1503            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());15041505            Self::ensure_contract_owned(sender, &contract_address)?;1506            <ContractSponsoringRateLimit<T>>::insert(contract_address, rate_limit);1507            Ok(())1508        }15091510        /// Enable the white list for a contract. Only addresses added to the white list with addToContractWhiteList will be able to call this smart contract.1511        /// 1512        /// # Permissions1513        /// 1514        /// * Address that deployed smart contract.1515        /// 1516        /// # Arguments1517        /// 1518        /// -`contract_address`: Address of the contract.1519        /// 1520        /// - `enable`: .  1521        #[weight = <T as Config>::WeightInfo::toggle_contract_white_list()]1522        pub fn toggle_contract_white_list(1523            origin,1524            contract_address: T::AccountId,1525            enable: bool1526        ) -> DispatchResult {1527            let sender = ensure_signed(origin)?;15281529            #[cfg(feature = "runtime-benchmarks")]1530            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());15311532            Self::ensure_contract_owned(sender, &contract_address)?;1533            <ContractWhiteListEnabled<T>>::insert(contract_address, enable);1534            Ok(())1535        }1536        1537        /// Add an address to smart contract white list.1538        /// 1539        /// # Permissions1540        /// 1541        /// * Address that deployed smart contract.1542        /// 1543        /// # Arguments1544        /// 1545        /// -`contract_address`: Address of the contract.1546        ///1547        /// -`account_address`: Address to add.1548        #[weight = <T as Config>::WeightInfo::add_to_contract_white_list()]1549        pub fn add_to_contract_white_list(1550            origin,1551            contract_address: T::AccountId,1552            account_address: T::AccountId1553        ) -> DispatchResult {1554            let sender = ensure_signed(origin)?;15551556            #[cfg(feature = "runtime-benchmarks")]1557            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());1558            1559            Self::ensure_contract_owned(sender, &contract_address)?;      1560            <ContractWhiteList<T>>::insert(contract_address, account_address, true);1561            Ok(())1562        }15631564        /// Remove an address from smart contract white list.1565        /// 1566        /// # Permissions1567        /// 1568        /// * Address that deployed smart contract.1569        /// 1570        /// # Arguments1571        /// 1572        /// -`contract_address`: Address of the contract.1573        ///1574        /// -`account_address`: Address to remove.1575        #[weight = <T as Config>::WeightInfo::remove_from_contract_white_list()]1576        pub fn remove_from_contract_white_list(1577            origin,1578            contract_address: T::AccountId,1579            account_address: T::AccountId1580        ) -> DispatchResult {1581            let sender = ensure_signed(origin)?;15821583            #[cfg(feature = "runtime-benchmarks")]1584            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());15851586            Self::ensure_contract_owned(sender, &contract_address)?;1587            <ContractWhiteList<T>>::remove(contract_address, account_address);1588            Ok(())1589        }15901591        #[weight = <T as Config>::WeightInfo::set_collection_limits()]1592        pub fn set_collection_limits(1593            origin,1594            collection_id: u32,1595            new_limits: CollectionLimits<T::BlockNumber>,1596        ) -> DispatchResult {1597            let sender = ensure_signed(origin)?;1598            let mut target_collection = Self::get_collection(collection_id)?;1599            Self::check_owner_permissions(&target_collection, sender.clone())?;1600            let old_limits = &target_collection.limits;1601            let chain_limits = ChainLimit::get();16021603            // collection bounds1604            ensure!(new_limits.sponsor_transfer_timeout <= MAX_SPONSOR_TIMEOUT &&1605                new_limits.account_token_ownership_limit <= MAX_TOKEN_OWNERSHIP && 1606                new_limits.sponsored_data_size <= chain_limits.custom_data_limit,1607                Error::<T>::CollectionLimitBoundsExceeded);16081609            // token_limit   check  prev1610            ensure!(old_limits.token_limit >= new_limits.token_limit, Error::<T>::CollectionTokenLimitExceeded);1611            ensure!(new_limits.token_limit > 0, Error::<T>::CollectionTokenLimitExceeded);16121613            ensure!(1614                (old_limits.owner_can_transfer || !new_limits.owner_can_transfer) &&1615                (old_limits.owner_can_destroy || !new_limits.owner_can_destroy),1616                Error::<T>::OwnerPermissionsCantBeReverted,1617            );16181619            target_collection.limits = new_limits;1620            Self::save_collection(target_collection);16211622            Ok(())1623        } 1624    }1625}16261627impl<T: Config> Module<T> {16281629    pub fn transfer_internal(sender: T::AccountId, recipient: T::AccountId, target_collection: &CollectionHandle<T>, item_id: TokenId, value: u128) -> DispatchResult {1630        // Limits check1631        Self::is_correct_transfer(target_collection, &recipient)?;16321633        // Transfer permissions check1634        ensure!(Self::is_item_owner(sender.clone(), target_collection, item_id) ||1635            Self::is_owner_or_admin_permissions(target_collection, sender.clone()),1636            Error::<T>::NoPermission);16371638        if target_collection.access == AccessMode::WhiteList {1639            Self::check_white_list(target_collection, &sender)?;1640            Self::check_white_list(target_collection, &recipient)?;1641        }16421643        match target_collection.mode1644        {1645            CollectionMode::NFT => Self::transfer_nft(target_collection, item_id, sender.clone(), recipient.clone())?,1646            CollectionMode::Fungible(_)  => Self::transfer_fungible(target_collection, value, &sender, &recipient)?,1647            CollectionMode::ReFungible  => Self::transfer_refungible(target_collection, item_id, value, sender.clone(), recipient.clone())?,1648            _ => ()1649        };16501651        Self::deposit_event(RawEvent::Transfer(target_collection.id, item_id, sender, recipient, value));16521653        Ok(())1654    }165516561657    fn is_correct_transfer(collection: &CollectionHandle<T>, recipient: &T::AccountId) -> DispatchResult {1658        let collection_id = collection.id;16591660        // check token limit and account token limit1661        let account_items: u32 = <AddressTokens<T>>::get(collection_id, recipient).len() as u32;1662        ensure!(collection.limits.account_token_ownership_limit > account_items,  Error::<T>::AccountTokenLimitExceeded);1663        1664        Ok(())1665    }16661667    fn can_create_items_in_collection(collection: &CollectionHandle<T>, sender: &T::AccountId, owner: &T::AccountId, amount: u32) -> DispatchResult {1668        let collection_id = collection.id;16691670        // check token limit and account token limit1671        let total_items: u32 = ItemListIndex::get(collection_id)1672            .checked_add(amount)1673            .ok_or(Error::<T>::CollectionTokenLimitExceeded)?;1674        let account_items: u32 = (<AddressTokens<T>>::get(collection_id, owner).len() as u32)1675            .checked_add(amount)1676            .ok_or(Error::<T>::AccountTokenLimitExceeded)?;1677        ensure!(collection.limits.token_limit >= total_items,  Error::<T>::CollectionTokenLimitExceeded);1678        ensure!(collection.limits.account_token_ownership_limit >= account_items,  Error::<T>::AccountTokenLimitExceeded);16791680        if !Self::is_owner_or_admin_permissions(collection, sender.clone()) {1681            ensure!(collection.mint_mode == true, Error::<T>::PublicMintingNotAllowed);1682            Self::check_white_list(collection, owner)?;1683            Self::check_white_list(collection, sender)?;1684        }16851686        Ok(())1687    }16881689    fn validate_create_item_args(target_collection: &CollectionHandle<T>, data: &CreateItemData) -> DispatchResult {1690        match target_collection.mode1691        {1692            CollectionMode::NFT => {1693                if let CreateItemData::NFT(data) = data {1694                    // check sizes1695                    ensure!(ChainLimit::get().custom_data_limit >= data.const_data.len() as u32, Error::<T>::TokenConstDataLimitExceeded);1696                    ensure!(ChainLimit::get().custom_data_limit >= data.variable_data.len() as u32, Error::<T>::TokenVariableDataLimitExceeded);1697                } else {1698                    fail!(Error::<T>::NotNftDataUsedToMintNftCollectionToken);1699                }1700            },1701            CollectionMode::Fungible(_) => {1702                if let CreateItemData::Fungible(_) = data {1703                } else {1704                    fail!(Error::<T>::NotFungibleDataUsedToMintFungibleCollectionToken);1705                }1706            },1707            CollectionMode::ReFungible => {1708                if let CreateItemData::ReFungible(data) = data {17091710                    // check sizes1711                    ensure!(ChainLimit::get().custom_data_limit >= data.const_data.len() as u32, Error::<T>::TokenConstDataLimitExceeded);1712                    ensure!(ChainLimit::get().custom_data_limit >= data.variable_data.len() as u32, Error::<T>::TokenVariableDataLimitExceeded);17131714                    // Check refungibility limits1715                    ensure!(data.pieces <= MAX_REFUNGIBLE_PIECES, Error::<T>::WrongRefungiblePieces);1716                    ensure!(data.pieces > 0, Error::<T>::WrongRefungiblePieces);1717                } else {1718                    fail!(Error::<T>::NotReFungibleDataUsedToMintReFungibleCollectionToken);1719                }1720            },1721            _ => { fail!(Error::<T>::UnexpectedCollectionType); }1722        };17231724        Ok(())1725    }17261727    fn create_item_no_validation(collection: &CollectionHandle<T>, owner: T::AccountId, data: CreateItemData) -> DispatchResult {1728        let collection_id = collection.id;17291730        match data1731        {1732            CreateItemData::NFT(data) => {1733                let item = NftItemType {1734                    owner: owner.clone(),1735                    const_data: data.const_data,1736                    variable_data: data.variable_data1737                };17381739                Self::add_nft_item(collection, item)?;1740            },1741            CreateItemData::Fungible(data) => {1742                Self::add_fungible_item(collection, &owner, data.value)?;1743            },1744            CreateItemData::ReFungible(data) => {1745                let mut owner_list = Vec::new();1746                owner_list.push(Ownership {owner: owner.clone(), fraction: data.pieces});17471748                let item = ReFungibleItemType {1749                    owner: owner_list,1750                    const_data: data.const_data,1751                    variable_data: data.variable_data1752                };17531754                Self::add_refungible_item(collection, item)?;1755            }1756        };17571758        // call event1759        Self::deposit_event(RawEvent::ItemCreated(collection_id, <ItemListIndex>::get(collection_id), owner));17601761        Ok(())1762    }17631764    fn add_fungible_item(collection: &CollectionHandle<T>, owner: &T::AccountId, value: u128) -> DispatchResult {1765        let collection_id = collection.id;17661767        // Does new owner already have an account?1768        let mut balance: u128 = 0;1769        if <FungibleItemList<T>>::contains_key(collection_id, owner) {1770            balance = <FungibleItemList<T>>::get(collection_id, owner).value;1771        } 17721773        // Mint 1774        let item = FungibleItemType {1775            value: balance + value1776        };1777        <FungibleItemList<T>>::insert(collection_id, (*owner).clone(), item);17781779        // Update balance1780        let new_balance = <Balance<T>>::get(collection_id, owner)1781            .checked_add(value)1782            .ok_or(Error::<T>::NumOverflow)?;1783        <Balance<T>>::insert(collection_id, (*owner).clone(), new_balance);17841785        Ok(())1786    }17871788    fn add_refungible_item(collection: &CollectionHandle<T>, item: ReFungibleItemType<T::AccountId>) -> DispatchResult {1789        let collection_id = collection.id;17901791        let current_index = <ItemListIndex>::get(collection_id)1792            .checked_add(1)1793            .ok_or(Error::<T>::NumOverflow)?;1794        let itemcopy = item.clone();17951796        let value = item.owner.first().unwrap().fraction;1797        let owner = item.owner.first().unwrap().owner.clone();17981799        Self::add_token_index(collection_id, current_index, &owner)?;18001801        <ItemListIndex>::insert(collection_id, current_index);1802        <ReFungibleItemList<T>>::insert(collection_id, current_index, itemcopy);18031804        // Update balance1805        let new_balance = <Balance<T>>::get(collection_id, &owner)1806            .checked_add(value)1807            .ok_or(Error::<T>::NumOverflow)?;1808        <Balance<T>>::insert(collection_id, owner.clone(), new_balance);18091810        Ok(())1811    }18121813    fn add_nft_item(collection: &CollectionHandle<T>, item: NftItemType<T::AccountId>) -> DispatchResult {1814        let collection_id = collection.id;18151816        let current_index = <ItemListIndex>::get(collection_id)1817            .checked_add(1)1818            .ok_or(Error::<T>::NumOverflow)?;18191820        let item_owner = item.owner.clone();1821        Self::add_token_index(collection_id, current_index, &item.owner)?;18221823        <ItemListIndex>::insert(collection_id, current_index);1824        <NftItemList<T>>::insert(collection_id, current_index, item);18251826        // Update balance1827        let new_balance = <Balance<T>>::get(collection_id, item_owner.clone())1828            .checked_add(1)1829            .ok_or(Error::<T>::NumOverflow)?;1830        <Balance<T>>::insert(collection_id, item_owner.clone(), new_balance);18311832        Ok(())1833    }18341835    fn burn_refungible_item(1836        collection: &CollectionHandle<T>,1837        item_id: TokenId,1838        owner: &T::AccountId,1839    ) -> DispatchResult {1840        let collection_id = collection.id;18411842        ensure!(1843            <ReFungibleItemList<T>>::contains_key(collection_id, item_id),1844            Error::<T>::TokenNotFound1845        );1846        let mut token = <ReFungibleItemList<T>>::get(collection_id, item_id);1847        let rft_balance = token1848            .owner1849            .iter()1850            .filter(|&i| i.owner == *owner)1851            .next()1852            .unwrap();1853        Self::remove_token_index(collection_id, item_id, owner)?;18541855        // update balance1856        let new_balance = <Balance<T>>::get(collection_id, rft_balance.owner.clone())1857            .checked_sub(rft_balance.fraction)1858            .ok_or(Error::<T>::NumOverflow)?;1859        <Balance<T>>::insert(collection_id, rft_balance.owner.clone(), new_balance);18601861        // Re-create owners list with sender removed1862        let index = token1863            .owner1864            .iter()1865            .position(|i| i.owner == *owner)1866            .unwrap();1867        token.owner.remove(index);1868        let owner_count = token.owner.len();18691870        // Burn the token completely if this was the last (only) owner1871        if owner_count == 0 {1872            <ReFungibleItemList<T>>::remove(collection_id, item_id);1873            <VariableMetaDataBasket<T>>::remove(collection_id, item_id);1874        }1875        else {1876            <ReFungibleItemList<T>>::insert(collection_id, item_id, token);1877        }18781879        Ok(())1880    }18811882    fn burn_nft_item(collection: &CollectionHandle<T>, item_id: TokenId) -> DispatchResult {1883        let collection_id = collection.id;18841885        ensure!(1886            <NftItemList<T>>::contains_key(collection_id, item_id),1887            Error::<T>::TokenNotFound1888        );1889        let item = <NftItemList<T>>::get(collection_id, item_id);1890        Self::remove_token_index(collection_id, item_id, &item.owner)?;18911892        // update balance1893        let new_balance = <Balance<T>>::get(collection_id, &item.owner)1894            .checked_sub(1)1895            .ok_or(Error::<T>::NumOverflow)?;1896        <Balance<T>>::insert(collection_id, item.owner.clone(), new_balance);1897        <NftItemList<T>>::remove(collection_id, item_id);1898        <VariableMetaDataBasket<T>>::remove(collection_id, item_id);18991900        Ok(())1901    }19021903    fn burn_fungible_item(owner: &T::AccountId, collection: &CollectionHandle<T>, value: u128) -> DispatchResult {1904        let collection_id = collection.id;19051906        ensure!(1907            <FungibleItemList<T>>::contains_key(collection_id, owner),1908            Error::<T>::TokenNotFound1909        );1910        let mut balance = <FungibleItemList<T>>::get(collection_id, owner);1911        ensure!(balance.value >= value, Error::<T>::TokenValueNotEnough);19121913        // update balance1914        let new_balance = <Balance<T>>::get(collection_id, owner)1915            .checked_sub(value)1916            .ok_or(Error::<T>::NumOverflow)?;1917        <Balance<T>>::insert(collection_id, (*owner).clone(), new_balance);19181919        if balance.value - value > 0 {1920            balance.value -= value;1921            <FungibleItemList<T>>::insert(collection_id, (*owner).clone(), balance);1922        }1923        else {1924            <FungibleItemList<T>>::remove(collection_id, owner);1925        }19261927        Ok(())1928    }19291930    pub fn get_collection(collection_id: CollectionId) -> Result<CollectionHandle<T>, sp_runtime::DispatchError> {1931        Ok(<CollectionById<T>>::get(collection_id)1932            .map(|collection| CollectionHandle {1933                id: collection_id,1934                collection1935            })1936            .ok_or(Error::<T>::CollectionNotFound)?)1937    }19381939    fn save_collection(collection: CollectionHandle<T>) {1940        <CollectionById<T>>::insert(collection.id, collection.collection);1941    }19421943    fn check_owner_permissions(target_collection: &CollectionHandle<T>, subject: T::AccountId) -> DispatchResult {1944        ensure!(1945            subject == target_collection.owner,1946            Error::<T>::NoPermission1947        );19481949        Ok(())1950    }19511952    fn is_owner_or_admin_permissions(collection: &CollectionHandle<T>, subject: T::AccountId) -> bool {1953        let mut result: bool = subject == collection.owner;1954        let exists = <AdminList<T>>::contains_key(collection.id);19551956        if !result & exists {1957            if <AdminList<T>>::get(collection.id).contains(&subject) {1958                result = true1959            }1960        }19611962        result1963    }19641965    fn check_owner_or_admin_permissions(1966        collection: &CollectionHandle<T>,1967        subject: T::AccountId,1968    ) -> DispatchResult {1969        let result = Self::is_owner_or_admin_permissions(collection, subject.clone());19701971        ensure!(1972            result,1973            Error::<T>::NoPermission1974        );1975        Ok(())1976    }19771978    fn owned_amount(1979        subject: T::AccountId,1980        target_collection: &CollectionHandle<T>,1981        item_id: TokenId,1982    ) -> Option<u128> {1983        let collection_id = target_collection.id;19841985        match target_collection.mode {1986            CollectionMode::NFT => {1987                if <NftItemList<T>>::get(collection_id, item_id).owner == subject {1988                    return Some(1)1989                }1990                None1991            },1992            CollectionMode::Fungible(_) => {1993                if <FungibleItemList<T>>::contains_key(collection_id, &subject) {1994                    return Some(<FungibleItemList<T>>::get(collection_id, &subject)1995                        .value);1996                }1997                None1998            },1999            CollectionMode::ReFungible => <ReFungibleItemList<T>>::get(collection_id, item_id)2000                .owner2001                .iter()2002                .find(|i| i.owner == subject)2003                .map(|i| i.fraction),2004            CollectionMode::Invalid => None,2005        }2006    }20072008    fn is_item_owner(subject: T::AccountId, target_collection: &CollectionHandle<T>, item_id: TokenId) -> bool {2009        let collection_id = target_collection.id;20102011        match target_collection.mode {2012            CollectionMode::NFT => {2013                <NftItemList<T>>::get(collection_id, item_id).owner == subject2014            }2015            CollectionMode::Fungible(_) => {2016                <FungibleItemList<T>>::contains_key(collection_id, &subject)2017            }2018            CollectionMode::ReFungible => {2019                <ReFungibleItemList<T>>::get(collection_id, item_id)2020                    .owner2021                    .iter()2022                    .any(|i| i.owner == subject)2023            }2024            CollectionMode::Invalid => false,2025        }2026    }20272028    fn check_white_list(collection: &CollectionHandle<T>, address: &T::AccountId) -> DispatchResult {2029        let collection_id = collection.id;20302031        let mes = Error::<T>::AddresNotInWhiteList;2032        ensure!(<WhiteList<T>>::contains_key(collection_id, address), mes);20332034        Ok(())2035    }20362037    /// Check if token exists. In case of Fungible, check if there is an entry for 2038    /// the owner in fungible balances double map2039    fn token_exists(2040        target_collection: &CollectionHandle<T>,2041        item_id: TokenId,2042        owner: &T::AccountId2043    ) -> DispatchResult {2044        let collection_id = target_collection.id;2045        let exists = match target_collection.mode2046        {2047            CollectionMode::NFT => <NftItemList<T>>::contains_key(collection_id, item_id),2048            CollectionMode::Fungible(_)  => <FungibleItemList<T>>::contains_key(collection_id, owner),2049            CollectionMode::ReFungible  => <ReFungibleItemList<T>>::contains_key(collection_id, item_id),2050            _ => false2051        };20522053        ensure!(exists == true, Error::<T>::TokenNotFound);2054        Ok(())2055    }20562057    fn transfer_fungible(2058        collection: &CollectionHandle<T>,2059        value: u128,2060        owner: &T::AccountId,2061        recipient: &T::AccountId,2062    ) -> DispatchResult {2063        let collection_id = collection.id;2064        Self::token_exists(&collection, 0, owner)?;20652066        let mut balance = <FungibleItemList<T>>::get(collection_id, owner);2067        ensure!(balance.value >= value, Error::<T>::TokenValueTooLow);20682069        // Send balance to recipient (updates balanceOf of recipient)2070        Self::add_fungible_item(collection, recipient, value)?;20712072        // update balanceOf of sender2073        <Balance<T>>::insert(collection_id, (*owner).clone(), balance.value - value);20742075        // Reduce or remove sender2076        if balance.value == value {2077            <FungibleItemList<T>>::remove(collection_id, owner);2078        }2079        else {2080            balance.value -= value;2081            <FungibleItemList<T>>::insert(collection_id, (*owner).clone(), balance);2082        }20832084        Ok(())2085    }20862087    fn transfer_refungible(2088        collection: &CollectionHandle<T>,2089        item_id: TokenId,2090        value: u128,2091        owner: T::AccountId,2092        new_owner: T::AccountId,2093    ) -> DispatchResult {2094        let collection_id = collection.id;2095        Self::token_exists(collection, item_id, &owner)?;20962097        let full_item = <ReFungibleItemList<T>>::get(collection_id, item_id);2098        let item = full_item2099            .owner2100            .iter()2101            .filter(|i| i.owner == owner)2102            .next()2103            .ok_or(Error::<T>::NumOverflow)?;2104        let amount = item.fraction;21052106        ensure!(amount >= value, Error::<T>::TokenValueTooLow);21072108        // update balance2109        let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.clone())2110            .checked_sub(value)2111            .ok_or(Error::<T>::NumOverflow)?;2112        <Balance<T>>::insert(collection_id, item.owner.clone(), balance_old_owner);21132114        let balancenew_owner = <Balance<T>>::get(collection_id, new_owner.clone())2115            .checked_add(value)2116            .ok_or(Error::<T>::NumOverflow)?;2117        <Balance<T>>::insert(collection_id, new_owner.clone(), balancenew_owner);21182119        let old_owner = item.owner.clone();2120        let new_owner_has_account = full_item.owner.iter().any(|i| i.owner == new_owner);21212122        // transfer2123        if amount == value && !new_owner_has_account {2124            // change owner2125            // new owner do not have account2126            let mut new_full_item = full_item.clone();2127            new_full_item2128                .owner2129                .iter_mut()2130                .find(|i| i.owner == owner)2131                .unwrap()2132                .owner = new_owner.clone();2133            <ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);21342135            // update index collection2136            Self::move_token_index(collection_id, item_id, &old_owner, &new_owner)?;2137        } else {2138            let mut new_full_item = full_item.clone();2139            new_full_item2140                .owner2141                .iter_mut()2142                .find(|i| i.owner == owner)2143                .unwrap()2144                .fraction -= value;21452146            // separate amount2147            if new_owner_has_account {2148                // new owner has account2149                new_full_item2150                    .owner2151                    .iter_mut()2152                    .find(|i| i.owner == new_owner)2153                    .unwrap()2154                    .fraction += value;2155            } else {2156                // new owner do not have account2157                new_full_item.owner.push(Ownership {2158                    owner: new_owner.clone(),2159                    fraction: value,2160                });2161                Self::add_token_index(collection_id, item_id, &new_owner)?;2162            }21632164            <ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);2165        }21662167        Ok(())2168    }21692170    fn transfer_nft(2171        collection: &CollectionHandle<T>,2172        item_id: TokenId,2173        sender: T::AccountId,2174        new_owner: T::AccountId,2175    ) -> DispatchResult {2176        let collection_id = collection.id;2177        Self::token_exists(&collection, item_id, &sender)?;21782179        let mut item = <NftItemList<T>>::get(collection_id, item_id);21802181        ensure!(2182            sender == item.owner,2183            Error::<T>::MustBeTokenOwner2184        );21852186        // update balance2187        let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.clone())2188            .checked_sub(1)2189            .ok_or(Error::<T>::NumOverflow)?;2190        <Balance<T>>::insert(collection_id, item.owner.clone(), balance_old_owner);21912192        let balancenew_owner = <Balance<T>>::get(collection_id, new_owner.clone())2193            .checked_add(1)2194            .ok_or(Error::<T>::NumOverflow)?;2195        <Balance<T>>::insert(collection_id, new_owner.clone(), balancenew_owner);21962197        // change owner2198        let old_owner = item.owner.clone();2199        item.owner = new_owner.clone();2200        <NftItemList<T>>::insert(collection_id, item_id, item);22012202        // update index collection2203        Self::move_token_index(collection_id, item_id, &old_owner, &new_owner)?;22042205        Ok(())2206    }2207    2208    fn set_re_fungible_variable_data(2209        collection: &CollectionHandle<T>,2210        item_id: TokenId,2211        data: Vec<u8>2212    ) -> DispatchResult {2213        let collection_id = collection.id;2214        let mut item = <ReFungibleItemList<T>>::get(collection_id, item_id);22152216        item.variable_data = data;22172218        <ReFungibleItemList<T>>::insert(collection_id, item_id, item);22192220        Ok(())2221    }22222223    fn set_nft_variable_data(2224        collection: &CollectionHandle<T>,2225        item_id: TokenId,2226        data: Vec<u8>2227    ) -> DispatchResult {2228        let collection_id = collection.id;2229        let mut item = <NftItemList<T>>::get(collection_id, item_id);2230        2231        item.variable_data = data;22322233        <NftItemList<T>>::insert(collection_id, item_id, item);2234        2235        Ok(())2236    }22372238    fn init_collection(item: &Collection<T>) {2239        // check params2240        assert!(2241            item.decimal_points <= MAX_DECIMAL_POINTS,2242            "decimal_points parameter must be lower than MAX_DECIMAL_POINTS"2243        );2244        assert!(2245            item.name.len() <= 64,2246            "Collection name can not be longer than 63 char"2247        );2248        assert!(2249            item.name.len() <= 256,2250            "Collection description can not be longer than 255 char"2251        );2252        assert!(2253            item.token_prefix.len() <= 16,2254            "Token prefix can not be longer than 15 char"2255        );22562257        // Generate next collection ID2258        let next_id = CreatedCollectionCount::get()2259            .checked_add(1)2260            .unwrap();22612262        CreatedCollectionCount::put(next_id);2263    }22642265    fn init_nft_token(collection_id: CollectionId, item: &NftItemType<T::AccountId>) {2266        let current_index = <ItemListIndex>::get(collection_id)2267            .checked_add(1)2268            .unwrap();22692270        let item_owner = item.owner.clone();2271        Self::add_token_index(collection_id, current_index, &item.owner).unwrap();22722273        <ItemListIndex>::insert(collection_id, current_index);22742275        // Update balance2276        let new_balance = <Balance<T>>::get(collection_id, &item_owner)2277            .checked_add(1)2278            .unwrap();2279        <Balance<T>>::insert(collection_id, item_owner.clone(), new_balance);2280    }22812282    fn init_fungible_token(collection_id: CollectionId, owner: &T::AccountId, item: &FungibleItemType) {2283        let current_index = <ItemListIndex>::get(collection_id)2284            .checked_add(1)2285            .unwrap();22862287        Self::add_token_index(collection_id, current_index, owner).unwrap();22882289        <ItemListIndex>::insert(collection_id, current_index);22902291        // Update balance2292        let new_balance = <Balance<T>>::get(collection_id, owner)2293            .checked_add(item.value)2294            .unwrap();2295        <Balance<T>>::insert(collection_id, (*owner).clone(), new_balance);2296    }22972298    fn init_refungible_token(collection_id: CollectionId, item: &ReFungibleItemType<T::AccountId>) {2299        let current_index = <ItemListIndex>::get(collection_id)2300            .checked_add(1)2301            .unwrap();23022303        let value = item.owner.first().unwrap().fraction;2304        let owner = item.owner.first().unwrap().owner.clone();23052306        Self::add_token_index(collection_id, current_index, &owner).unwrap();23072308        <ItemListIndex>::insert(collection_id, current_index);23092310        // Update balance2311        let new_balance = <Balance<T>>::get(collection_id, &owner)2312            .checked_add(value)2313            .unwrap();2314        <Balance<T>>::insert(collection_id, owner.clone(), new_balance);2315    }23162317    fn add_token_index(collection_id: CollectionId, item_index: TokenId, owner: &T::AccountId) -> DispatchResult {2318        // add to account limit2319        if <AccountItemCount<T>>::contains_key(owner) {23202321            // bound Owned tokens by a single address2322            let count = <AccountItemCount<T>>::get(owner);2323            ensure!(count < ChainLimit::get().account_token_ownership_limit, Error::<T>::AddressOwnershipLimitExceeded);23242325            <AccountItemCount<T>>::insert(owner.clone(), count2326                .checked_add(1)2327                .ok_or(Error::<T>::NumOverflow)?);2328        }2329        else {2330            <AccountItemCount<T>>::insert(owner.clone(), 1);2331        }23322333        let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner);2334        if list_exists {2335            let mut list = <AddressTokens<T>>::get(collection_id, owner);2336            let item_contains = list.contains(&item_index.clone());23372338            if !item_contains {2339                list.push(item_index.clone());2340            }23412342            <AddressTokens<T>>::insert(collection_id, owner.clone(), list);2343        } else {2344            let mut itm = Vec::new();2345            itm.push(item_index.clone());2346            <AddressTokens<T>>::insert(collection_id, owner.clone(), itm);2347        }23482349        Ok(())2350    }23512352    fn remove_token_index(2353        collection_id: CollectionId,2354        item_index: TokenId,2355        owner: &T::AccountId,2356    ) -> DispatchResult {23572358        // update counter2359        <AccountItemCount<T>>::insert(owner.clone(), 2360            <AccountItemCount<T>>::get(owner)2361            .checked_sub(1)2362            .ok_or(Error::<T>::NumOverflow)?);236323642365        let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner);2366        if list_exists {2367            let mut list = <AddressTokens<T>>::get(collection_id, owner);2368            let item_contains = list.contains(&item_index.clone());23692370            if item_contains {2371                list.retain(|&item| item != item_index);2372                <AddressTokens<T>>::insert(collection_id, owner.clone(), list);2373            }2374        }23752376        Ok(())2377    }23782379    fn move_token_index(2380        collection_id: CollectionId,2381        item_index: TokenId,2382        old_owner: &T::AccountId,2383        new_owner: &T::AccountId,2384    ) -> DispatchResult {2385        Self::remove_token_index(collection_id, item_index, old_owner)?;2386        Self::add_token_index(collection_id, item_index, new_owner)?;23872388        Ok(())2389    }2390    2391    fn ensure_contract_owned(account: T::AccountId, contract: &T::AccountId) -> DispatchResult {2392        if <ContractOwner<T>>::contains_key(contract.clone()) {2393            let owner = <ContractOwner<T>>::get(contract);2394            ensure!(account == owner, Error::<T>::NoPermission);2395        } else {2396            fail!(Error::<T>::NoPermission);2397        }23982399        Ok(())2400    }2401}24022403////////////////////////////////////////////////////////////////////////////////////////////////////2404// Economic models2405// #region24062407/// Fee multiplier.2408pub type Multiplier = FixedU128;24092410type BalanceOf<T> = <<T as pallet_transaction_payment::Config>::OnChargeTransaction as pallet_transaction_payment::OnChargeTransaction<T>>::Balance;24112412/// Require the transactor pay for themselves and maybe include a tip to gain additional priority2413/// in the queue.2414#[derive(Encode, Decode, Clone, Eq, PartialEq)]2415pub struct ChargeTransactionPayment<T: Config>(#[codec(compact)] BalanceOf<T>);24162417impl<T: Config + Send + Sync> sp_std::fmt::Debug 2418    for ChargeTransactionPayment<T>2419{2420	#[cfg(feature = "std")]2421	fn fmt(&self, f: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {2422		write!(f, "ChargeTransactionPayment<{:?}>", self.0)2423	}2424	#[cfg(not(feature = "std"))]2425	fn fmt(&self, _: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {2426		Ok(())2427	}2428}24292430impl<T: Config> ChargeTransactionPayment<T>2431where2432    T::Call: Dispatchable<Info=DispatchInfo, PostInfo=PostDispatchInfo> + IsSubType<Call<T>> + IsSubType<pallet_contracts::Call<T>>,2433    BalanceOf<T>: Send + Sync + From<u64> + FixedPointOperand,2434    T::AccountId: AsRef<[u8]>,2435    T::AccountId: UncheckedFrom<T::Hash>,2436{2437    fn traditional_fee(2438        len: usize,2439        info: &DispatchInfoOf<T::Call>,2440        tip: BalanceOf<T>,2441    ) -> BalanceOf<T>2442    where2443        T::Call: Dispatchable<Info = DispatchInfo>,2444    {2445        <pallet_transaction_payment::Module<T>>::compute_fee(len as u32, info, tip)2446    }24472448	fn get_priority(len: usize, info: &DispatchInfoOf<T::Call>, final_fee: BalanceOf<T>) -> TransactionPriority {2449        let weight_saturation = T::BlockWeights::get().max_block / info.weight.max(1);2450        let max_block_length = *T::BlockLength::get().max.get(DispatchClass::Normal);2451        let len_saturation = max_block_length as u64 / (len as u64).max(1);2452        let coefficient: BalanceOf<T> = weight_saturation2453            .min(len_saturation)2454            .saturated_into::<BalanceOf<T>>();2455        final_fee2456            .saturating_mul(coefficient)2457            .saturated_into::<TransactionPriority>()2458    }24592460    fn withdraw_fee(2461        &self,2462        who: &T::AccountId,2463        call: &T::Call,2464        info: &DispatchInfoOf<T::Call>,2465        len: usize,2466	) -> Result<2467		(2468			BalanceOf<T>,2469			<<T as pallet_transaction_payment::Config>::OnChargeTransaction as pallet_transaction_payment::OnChargeTransaction<T>>::LiquidityInfo,2470		),2471		TransactionValidityError,2472	> {2473        let tip = self.0;24742475        // Set fee based on call type. Creating collection costs 1 Unique.2476        // All other transactions have traditional fees so far2477        // let fee = match call.is_sub_type() {2478        //     Some(Call::create_collection(..)) => <BalanceOf<T>>::from(1_000_000_000),2479        //     _ => Self::traditional_fee(len, info, tip), // Flat fee model, use only for testing purposes2480        //                                                 // _ => <BalanceOf<T>>::from(100)2481        // };2482        let fee = Self::traditional_fee(len, info, tip);24832484        // Only mess with balances if fee is not zero.2485        if fee.is_zero() {2486            return <<T as pallet_transaction_payment::Config>::OnChargeTransaction as pallet_transaction_payment::OnChargeTransaction<T>>::withdraw_fee(who, call, info, fee, tip)2487			.map(|i| (fee, i));2488        }24892490        // Determine who is paying transaction fee based on ecnomic model2491        // Parse call to extract collection ID and access collection sponsor2492        let mut sponsor: Option<T::AccountId> = (|| match IsSubType::<Call<T>>::is_sub_type(call) {2493            Some(Call::create_item(collection_id, _owner, _properties)) => {2494                let collection = <CollectionById<T>>::get(collection_id)?;24952496                // sponsor timeout2497                let block_number = <system::Module<T>>::block_number() as T::BlockNumber;24982499                let limit = collection.limits.sponsor_transfer_timeout;2500                if <CreateItemBasket<T>>::contains_key((collection_id, &who)) {2501                    let last_tx_block = <CreateItemBasket<T>>::get((collection_id, &who));2502                    let limit_time = last_tx_block + limit.into();2503                    if block_number <= limit_time {2504                        return None;2505                    }2506                }2507                <CreateItemBasket<T>>::insert((collection_id, who.clone()), block_number);25082509                // check free create limit2510                if (collection.limits.sponsored_data_size >= (_properties.len() as u32)) &&2511                   (collection.sponsor_confirmed)2512                {2513                    Some(collection.sponsor)2514                } else {2515                    None2516                }2517            }2518            Some(Call::transfer(_new_owner, collection_id, item_id, _value)) => {2519                let collection = <CollectionById<T>>::get(collection_id)?;2520                2521                let mut sponsor_transfer = false;2522                if collection.sponsor_confirmed {25232524                    let collection_limits = collection.limits;2525                    let collection_mode = collection.mode;2526    2527                    // sponsor timeout2528                    let block_number = <system::Module<T>>::block_number() as T::BlockNumber;2529                    sponsor_transfer = match collection_mode {2530                        CollectionMode::NFT => {2531    2532                            // get correct limit2533                            let limit: u32 = if collection_limits.sponsor_transfer_timeout > 0 {2534                                collection_limits.sponsor_transfer_timeout2535                            } else {2536                                ChainLimit::get().nft_sponsor_transfer_timeout2537                            };2538    2539                            let mut sponsored = true;2540                            if <NftTransferBasket<T>>::contains_key(collection_id, item_id) {2541                                let last_tx_block = <NftTransferBasket<T>>::get(collection_id, item_id);2542                                let limit_time = last_tx_block + limit.into();2543                                if block_number <= limit_time {2544                                    sponsored = false;2545                                }2546                            }2547                            if sponsored {2548                                <NftTransferBasket<T>>::insert(collection_id, item_id, block_number);2549                            }25502551                            sponsored2552                        }2553                        CollectionMode::Fungible(_) => {2554    2555                            // get correct limit2556                            let limit: u32 = if collection_limits.sponsor_transfer_timeout > 0 {2557                                collection_limits.sponsor_transfer_timeout2558                            } else {2559                                ChainLimit::get().fungible_sponsor_transfer_timeout2560                            };2561    2562                            let block_number = <system::Module<T>>::block_number() as T::BlockNumber;2563                            let mut sponsored = true;2564                            if <FungibleTransferBasket<T>>::contains_key(collection_id, who) {2565                                let last_tx_block = <FungibleTransferBasket<T>>::get(collection_id, who);2566                                let limit_time = last_tx_block + limit.into();2567                                if block_number <= limit_time {2568                                    sponsored = false;2569                                }2570                            }2571                            if sponsored {2572                                <FungibleTransferBasket<T>>::insert(collection_id, who, block_number);2573                            }25742575                            sponsored2576                        }2577                        CollectionMode::ReFungible => {2578    2579                            // get correct limit2580                            let limit: u32 = if collection_limits.sponsor_transfer_timeout > 0 {2581                                collection_limits.sponsor_transfer_timeout2582                            } else {2583                                ChainLimit::get().refungible_sponsor_transfer_timeout2584                            };2585    2586                            let mut sponsored = true;2587                            if <ReFungibleTransferBasket<T>>::contains_key(collection_id, item_id) {2588                                let last_tx_block = <ReFungibleTransferBasket<T>>::get(collection_id, item_id);2589                                let limit_time = last_tx_block + limit.into();2590                                if block_number <= limit_time {2591                                    sponsored = false;2592                                }2593                            }2594                            if sponsored {2595                                <ReFungibleTransferBasket<T>>::insert(collection_id, item_id, block_number);2596                            }25972598                            sponsored2599                        }2600                        _ => {2601                            false2602                        },2603                    };2604                }26052606                if !sponsor_transfer {2607                    None2608                } else {2609                    Some(collection.sponsor)2610                }2611            }26122613            Some(Call::set_variable_meta_data(collection_id, item_id, data)) => {2614                let mut sponsor_metadata_changes = false;26152616                let collection = <CollectionById<T>>::get(collection_id)?;26172618                if2619                    collection.sponsor_confirmed &&2620                    // Can't sponsor fungible collection, this tx will be rejected2621                    // as invalid2622                    !matches!(collection.mode, CollectionMode::Fungible(_)) &&2623                    data.len() <= collection.limits.sponsored_data_size as usize2624                {2625                    if let Some(rate_limit) = collection.limits.sponsored_data_rate_limit {2626                        let block_number = <system::Module<T>>::block_number() as T::BlockNumber;26272628                        if <VariableMetaDataBasket<T>>::get(collection_id, item_id)2629                            .map(|last_block| block_number - last_block > rate_limit)2630                            .unwrap_or(true) 2631                        {2632                            sponsor_metadata_changes = true;2633                            <VariableMetaDataBasket<T>>::insert(collection_id, item_id, block_number);2634                        }2635                    }2636                }26372638                if !sponsor_metadata_changes {2639                    None2640                } else {2641                    Some(collection.sponsor)2642                }2643            }26442645            _ => None,2646        })();26472648        match IsSubType::<pallet_contracts::Call<T>>::is_sub_type(call) {2649            Some(pallet_contracts::Call::call(dest, _value, _gas_limit, _data)) => {26502651                let called_contract: T::AccountId = T::Lookup::lookup((*dest).clone()).unwrap_or(T::AccountId::default());26522653                let owned_contract = <ContractOwner<T>>::contains_key(called_contract.clone())2654                  && <ContractOwner<T>>::get(called_contract.clone()) == *who;2655                let white_list_enabled = <ContractWhiteListEnabled<T>>::contains_key(called_contract.clone()) && <ContractWhiteListEnabled<T>>::get(called_contract.clone());2656                  2657                if !owned_contract && white_list_enabled {2658                    if !<ContractWhiteList<T>>::contains_key(called_contract.clone(), who) {2659                        return Err(InvalidTransaction::Call.into());2660                    }2661                }2662            },2663            _ => {},2664        }26652666        // Sponsor smart contracts2667        sponsor = sponsor.or_else(|| match IsSubType::<pallet_contracts::Call<T>>::is_sub_type(call) {26682669            // On instantiation: set the contract owner2670            Some(pallet_contracts::Call::instantiate(_endowment, _gas_limit, code_hash, _data, salt)) => {26712672                let new_contract_address = <pallet_contracts::Module<T>>::contract_address(2673                    &who,2674                    code_hash,2675                    salt,2676                );2677                <ContractOwner<T>>::insert(new_contract_address.clone(), who.clone());26782679                None2680            },26812682            // On instantiation with code: set the contract owner2683            Some(pallet_contracts::Call::instantiate_with_code(_endowment, _gas_limit, _code, _data, _salt))  => {26842685                let new_contract_address = <pallet_contracts::Module<T>>::contract_address(2686                    &who,2687                    &T::Hashing::hash(&_code),2688                    _salt,2689                );26902691                <ContractOwner<T>>::insert(new_contract_address.clone(), who.clone());26922693                None2694            }26952696            // When the contract is called, check if the sponsoring is enabled and pay fees from contract endowment if it is2697            Some(pallet_contracts::Call::call(dest, _value, _gas_limit, _data)) => {26982699                let called_contract: T::AccountId = T::Lookup::lookup((*dest).clone()).unwrap_or(T::AccountId::default());27002701                let mut sponsor_transfer = false;2702                if <ContractSponsoringRateLimit<T>>::contains_key(called_contract.clone()) {2703                    let last_tx_block = <ContractSponsorBasket<T>>::get((&called_contract, &who));2704                    let block_number = <system::Module<T>>::block_number() as T::BlockNumber;2705                    let rate_limit = <ContractSponsoringRateLimit<T>>::get(&called_contract);2706                    let limit_time = last_tx_block + rate_limit;27072708                    if block_number >= limit_time {2709                        <ContractSponsorBasket<T>>::insert((called_contract.clone(), who.clone()), block_number);2710                        sponsor_transfer = true;2711                    }2712                } else {2713                    sponsor_transfer = false;2714                }2715               2716                if sponsor_transfer {2717                    if <ContractSelfSponsoring<T>>::contains_key(called_contract.clone()) {2718                        if <ContractSelfSponsoring<T>>::get(called_contract.clone()) {2719                            return Some(called_contract);2720                        }2721                    }2722                }27232724                None2725            },27262727            _ => None,2728        });27292730        let who_pays_fee = sponsor.unwrap_or_else(|| who.clone());27312732		<<T as pallet_transaction_payment::Config>::OnChargeTransaction as pallet_transaction_payment::OnChargeTransaction<T>>::withdraw_fee(&who_pays_fee, call, info, fee, tip)2733			.map(|i| (fee, i))2734    }2735}273627372738impl<T: Config + Send + Sync> SignedExtension2739    for ChargeTransactionPayment<T>2740where2741    BalanceOf<T>: Send + Sync + From<u64> + FixedPointOperand,2742    T::Call: Dispatchable<Info = DispatchInfo, PostInfo = PostDispatchInfo> + IsSubType<Call<T>> + IsSubType<pallet_contracts::Call<T>>,2743    T::AccountId: AsRef<[u8]>,2744    T::AccountId: UncheckedFrom<T::Hash>,2745{2746    const IDENTIFIER: &'static str = "ChargeTransactionPayment";2747    type AccountId = T::AccountId;2748    type Call = T::Call;2749    type AdditionalSigned = ();2750    type Pre = (2751        // tip2752        BalanceOf<T>,2753        // who pays fee2754        Self::AccountId,2755		// imbalance resulting from withdrawing the fee2756		<<T as pallet_transaction_payment::Config>::OnChargeTransaction as pallet_transaction_payment::OnChargeTransaction<T>>::LiquidityInfo,2757    );2758    fn additional_signed(&self) -> sp_std::result::Result<(), TransactionValidityError> {2759        Ok(())2760    }27612762    fn validate(2763        &self,2764        who: &Self::AccountId,2765        call: &Self::Call,2766        info: &DispatchInfoOf<Self::Call>,2767        len: usize,2768    ) -> TransactionValidity {2769		let (fee, _) = self.withdraw_fee(who, call, info, len)?;2770		Ok(ValidTransaction {2771			priority: Self::get_priority(len, info, fee),2772			..Default::default()2773		})2774    }27752776    fn pre_dispatch(2777        self,2778        who: &Self::AccountId,2779        call: &Self::Call,2780        info: &DispatchInfoOf<Self::Call>,2781        len: usize,2782    ) -> Result<Self::Pre, TransactionValidityError> {2783        let (_fee, imbalance) = self.withdraw_fee(who, call, info, len)?;2784        Ok((self.0, who.clone(), imbalance))2785    }27862787    fn post_dispatch(2788        pre: Self::Pre,2789        info: &DispatchInfoOf<Self::Call>,2790        post_info: &PostDispatchInfoOf<Self::Call>,2791        len: usize,2792        _result: &DispatchResult,2793    ) -> Result<(), TransactionValidityError> {2794		let (tip, who, imbalance) = pre;2795		let actual_fee = pallet_transaction_payment::Module::<T>::compute_actual_fee(2796			len as u32,2797			info,2798			post_info,2799			tip,2800		);2801		<T as pallet_transaction_payment::Config>::OnChargeTransaction::correct_and_deposit_fee(&who, info, post_info, actual_fee, tip, imbalance)?;2802		Ok(())2803    }2804}28052806// #endregion