git.delta.rocks / unique-network / refs/commits / 061409929b86

1//2// This file is subject to the terms and conditions defined in3// file 'LICENSE', which is part of this source code package.4//56#![recursion_limit = "1024"]78#![cfg_attr(not(feature = "std"), no_std)]910#[cfg(feature = "std")]11pub use std::*;1213#[cfg(feature = "std")]14pub use serde::*;1516use codec::{Decode, Encode};17pub use frame_support::{18    construct_runtime, decl_event, decl_module, decl_storage, decl_error,19    dispatch::DispatchResult,20    ensure, fail, parameter_types,21    traits::{22        Currency, ExistenceRequirement, Get, Imbalance, KeyOwnerProofSystem, OnUnbalanced,23        Randomness, WithdrawReason,24    },25    weights::{26        constants::{BlockExecutionWeight, ExtrinsicBaseWeight, RocksDbWeight, WEIGHT_PER_SECOND},27        DispatchInfo, GetDispatchInfo, IdentityFee, Pays, PostDispatchInfo, Weight,28        WeightToFeePolynomial,29    },30    IsSubType, StorageValue,31};3233use frame_system::{self as system, ensure_signed, ensure_root};34use sp_runtime::sp_std::prelude::Vec;35use sp_runtime::{36    traits::{37        DispatchInfoOf, Dispatchable, PostDispatchInfoOf, Saturating, SaturatedConversion, SignedExtension, Zero,38    },39    transaction_validity::{40        TransactionPriority, InvalidTransaction, TransactionValidity, TransactionValidityError, ValidTransaction,41    },42    FixedPointOperand, FixedU128,43};44use pallet_contracts::ContractAddressFor;45use sp_runtime::traits::StaticLookup;4647#[cfg(test)]48mod mock;4950#[cfg(test)]51mod tests;5253mod default_weights;5455pub const MAX_DECIMAL_POINTS: DecimalPoints = 30;56pub const MAX_SPONSOR_TIMEOUT: u32 = 10_368_000;57pub const MAX_TOKEN_OWNERSHIP: u32 = 10_000_000;5859// Structs60// #region6162pub type CollectionId = u32;63pub type TokenId = u32;64pub type DecimalPoints = u8;6566#[derive(Encode, Decode, Eq, Debug, Clone, PartialEq)]67#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]68pub enum CollectionMode {69    Invalid,70    NFT,71    // decimal points72    Fungible(DecimalPoints),73    // decimal points74    ReFungible(DecimalPoints),75}7677impl Default for CollectionMode {78    fn default() -> Self {79        Self::Invalid80    }81}8283impl Into<u8> for CollectionMode {84    fn into(self) -> u8 {85        match self {86            CollectionMode::Invalid => 0,87            CollectionMode::NFT => 1,88            CollectionMode::Fungible(_) => 2,89            CollectionMode::ReFungible(_) => 3,90        }91    }92}9394#[derive(Encode, Decode, Eq, Debug, Clone, PartialEq)]95#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]96pub enum AccessMode {97    Normal,98    WhiteList,99}100impl Default for AccessMode {101    fn default() -> Self {102        Self::Normal103    }104}105106#[derive(Encode, Decode, Eq, Debug, Clone, PartialEq)]107#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]108pub enum SchemaVersion {109    ImageURL,110    Unique,111}112impl Default for SchemaVersion {113    fn default() -> Self {114        Self::ImageURL115    }116}117118#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]119#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]120pub struct Ownership<AccountId> {121    pub owner: AccountId,122    pub fraction: u128,123}124125#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]126#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]127pub struct CollectionType<AccountId> {128    pub owner: AccountId,129    pub mode: CollectionMode,130    pub access: AccessMode,131    pub decimal_points: DecimalPoints,132    pub name: Vec<u16>,        // 64 include null escape char133    pub description: Vec<u16>, // 256 include null escape char134    pub token_prefix: Vec<u8>, // 16 include null escape char135    pub mint_mode: bool,136    pub offchain_schema: Vec<u8>,137    pub schema_version: SchemaVersion,138    pub sponsor: AccountId, // Who pays fees. If set to default address, the fees are applied to the transaction sender139    pub sponsor_confirmed: bool, // False if sponsor address has not yet confirmed sponsorship. True otherwise.140    pub limits: CollectionLimits, // Collection private restrictions 141    pub variable_on_chain_schema: Vec<u8>, //142    pub const_on_chain_schema: Vec<u8>, //143}144145#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]146#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]147pub struct NftItemType<AccountId> {148    pub owner: AccountId,149    pub const_data: Vec<u8>,150    pub variable_data: Vec<u8>,151}152153#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]154#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]155pub struct FungibleItemType {156    pub value: u128,157}158159#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]160#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]161pub struct ReFungibleItemType<AccountId> {162    pub owner: Vec<Ownership<AccountId>>,163    pub const_data: Vec<u8>,164    pub variable_data: Vec<u8>,165}166167// #[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]168// #[cfg_attr(feature = "std", derive(Serialize, Deserialize))]169// pub struct VestingItem<AccountId, Moment> {170//     pub sender: AccountId,171//     pub recipient: AccountId,172//     pub collection_id: CollectionId,173//     pub item_id: TokenId,174//     pub amount: u64,175//     pub vesting_date: Moment,176// }177178#[derive(Encode, Decode, Debug, Clone, PartialEq)]179#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]180pub struct CollectionLimits {181    pub account_token_ownership_limit: u32,182    pub sponsored_data_size: u32,183    pub token_limit: u32,184185    // Timeouts for item types in passed blocks186    pub sponsor_transfer_timeout: u32,187}188189impl Default for CollectionLimits {190    fn default() -> CollectionLimits {191        CollectionLimits { 192            account_token_ownership_limit: 10_000_000, 193            token_limit: u32::max_value(),194            sponsored_data_size: u32::max_value(), 195            sponsor_transfer_timeout: 14400 }196    }197}198199#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]200#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]201pub struct ChainLimits {202    pub collection_numbers_limit: u32,203    pub account_token_ownership_limit: u32,204    pub collections_admins_limit: u64,205    pub custom_data_limit: u32,206207    // Timeouts for item types in passed blocks208    pub nft_sponsor_transfer_timeout: u32,209    pub fungible_sponsor_transfer_timeout: u32,210    pub refungible_sponsor_transfer_timeout: u32,211212    // Schema limits213    pub offchain_schema_limit: u32,214    pub variable_on_chain_schema_limit: u32,215    pub const_on_chain_schema_limit: u32,216}217218pub trait WeightInfo {219	fn create_collection() -> Weight;220	fn destroy_collection() -> Weight;221	fn add_to_white_list() -> Weight;222	fn remove_from_white_list() -> Weight;223    fn set_public_access_mode() -> Weight;224    fn set_mint_permission() -> Weight;225    fn change_collection_owner() -> Weight;226    fn add_collection_admin() -> Weight;227    fn remove_collection_admin() -> Weight;228    fn set_collection_sponsor() -> Weight;229    fn confirm_sponsorship() -> Weight;230    fn remove_collection_sponsor() -> Weight;231    fn create_item(s: usize) -> Weight;232    fn burn_item() -> Weight;233    fn transfer() -> Weight;234    fn approve() -> Weight;235    fn transfer_from() -> Weight;236    fn set_offchain_schema() -> Weight;237    fn set_const_on_chain_schema() -> Weight;238    fn set_variable_on_chain_schema() -> Weight;239    fn set_variable_meta_data() -> Weight;240    fn enable_contract_sponsoring() -> Weight;241    fn set_schema_version() -> Weight;242    fn set_chain_limits() -> Weight;243    fn set_contract_sponsoring_rate_limit() -> Weight;244    fn toggle_contract_white_list() -> Weight;245    fn add_to_contract_white_list() -> Weight;246    fn remove_from_contract_white_list() -> Weight;247    fn set_collection_limits() -> Weight;248}249250#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]251#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]252pub struct CreateNftData {253    pub const_data: Vec<u8>,254    pub variable_data: Vec<u8>,255}256257#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]258#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]259pub struct CreateFungibleData {260    pub value: u128,261}262263#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]264#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]265pub struct CreateReFungibleData {266    pub const_data: Vec<u8>,267    pub variable_data: Vec<u8>,268}269270#[derive(Encode, Decode, Debug, Clone, PartialEq)]271#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]272pub enum CreateItemData {273    NFT(CreateNftData),274    Fungible(CreateFungibleData),275    ReFungible(CreateReFungibleData),276}277278impl CreateItemData {279    pub fn len(&self) -> usize {280        let len = match self {281            CreateItemData::NFT(data) => data.variable_data.len() + data.const_data.len(),282            CreateItemData::ReFungible(data) => data.variable_data.len() + data.const_data.len(),283            _ => 0284        };285        286        return len;287    }288}289290impl From<CreateNftData> for CreateItemData {291    fn from(item: CreateNftData) -> Self {292        CreateItemData::NFT(item)293    }294}295296impl From<CreateReFungibleData> for CreateItemData {297    fn from(item: CreateReFungibleData) -> Self {298        CreateItemData::ReFungible(item)299    }300}301302impl From<CreateFungibleData> for CreateItemData {303    fn from(item: CreateFungibleData) -> Self {304        CreateItemData::Fungible(item)305    }306}307308309decl_error! {310	/// Error for non-fungible-token module.311	pub enum Error for Module<T: Trait> {312        /// Total collections bound exceeded.313        TotalCollectionsLimitExceeded,314		/// Decimal_points parameter must be lower than MAX_DECIMAL_POINTS constant, currently it is 30.315        CollectionDecimalPointLimitExceeded, 316        /// Collection name can not be longer than 63 char.317        CollectionNameLimitExceeded, 318        /// Collection description can not be longer than 255 char.319        CollectionDescriptionLimitExceeded, 320        /// Token prefix can not be longer than 15 char.321        CollectionTokenPrefixLimitExceeded,322        /// This collection does not exist.323        CollectionNotFound,324        /// Item not exists.325        TokenNotFound,326        /// Admin not found327        AdminNotFound,328        /// Arithmetic calculation overflow.329        NumOverflow,       330        /// Account already has admin role.331        AlreadyAdmin,  332        /// You do not own this collection.333        NoPermission,334        /// This address is not set as sponsor, use setCollectionSponsor first.335        ConfirmUnsetSponsorFail,336        /// Collection is not in mint mode.337        PublicMintingNotAllowed,338        /// Sender parameter and item owner must be equal.339        MustBeTokenOwner,340        /// Item balance not enough.341        TokenValueTooLow,342        /// Size of item is too large.343        NftSizeLimitExceeded,344        /// No approve found345        ApproveNotFound,346        /// Requested value more than approved.347        TokenValueNotEnough,348        /// Only approved addresses can call this method.349        ApproveRequired,350        /// Address is not in white list.351        AddresNotInWhiteList,352        /// Number of collection admins bound exceeded.353        CollectionAdminsLimitExceeded,354        /// Owned tokens by a single address bound exceeded.355        AddressOwnershipLimitExceeded,356        /// Length of items properties must be greater than 0.357        EmptyArgument,358        /// const_data exceeded data limit.359        TokenConstDataLimitExceeded,360        /// variable_data exceeded data limit.361        TokenVariableDataLimitExceeded,362        /// Not NFT item data used to mint in NFT collection.363        NotNftDataUsedToMintNftCollectionToken,364        /// Not Fungible item data used to mint in Fungible collection.365        NotFungibleDataUsedToMintFungibleCollectionToken,366        /// Not Re Fungible item data used to mint in Re Fungible collection.367        NotReFungibleDataUsedToMintReFungibleCollectionToken,368        /// Unexpected collection type.369        UnexpectedCollectionType,370        /// Can't store metadata in fungible tokens.371        CantStoreMetadataInFungibleTokens,372        /// Collection token limit exceeded373        CollectionTokenLimitExceeded,374        /// Account token limit exceeded per collection375        AccountTokenLimitExceeded,376        /// Collection limit bounds per collection exceeded377        CollectionLimitBoundsExceeded,378        /// Schema data size limit bound exceeded379        SchemaDataLimitExceeded380	}381}382383pub trait Trait: system::Trait + Sized + transaction_payment::Trait + pallet_contracts::Trait {384    type Event: From<Event<Self>> + Into<<Self as system::Trait>::Event>;385386    /// Weight information for extrinsics in this pallet.387	type WeightInfo: WeightInfo;388}389390#[cfg(feature = "runtime-benchmarks")]391mod benchmarking;392393// #endregion394395decl_storage! {396    trait Store for Module<T: Trait> as Nft {397398        // Private members399        NextCollectionID: CollectionId;400        CreatedCollectionCount: u32;401        ChainVersion: u64;402        ItemListIndex: map hasher(identity) CollectionId => TokenId;403404        // Chain limits struct405        pub ChainLimit get(fn chain_limit) config(): ChainLimits;406407        // Bound counters408        CollectionCount: u32;409        pub AccountItemCount get(fn account_item_count): map hasher(twox_64_concat) T::AccountId => u32;410411        // Basic collections412        pub Collection get(fn collection) config(): map hasher(identity) CollectionId => CollectionType<T::AccountId>;413        pub AdminList get(fn admin_list_collection): map hasher(identity) CollectionId => Vec<T::AccountId>;414        pub WhiteList get(fn white_list): double_map hasher(identity) CollectionId, hasher(twox_64_concat) T::AccountId => bool;415416        /// Balance owner per collection map417        pub Balance get(fn balance_count): double_map hasher(identity) CollectionId, hasher(twox_64_concat) T::AccountId => u128;418419        /// second parameter: item id + owner account id + spender account id420        pub Allowances get(fn approved): double_map hasher(identity) CollectionId, hasher(twox_64_concat) (TokenId, T::AccountId, T::AccountId) => u128;421422        /// Item collections423        pub NftItemList get(fn nft_item_id) config(): double_map hasher(identity) CollectionId, hasher(identity) TokenId => NftItemType<T::AccountId>;424        pub FungibleItemList get(fn fungible_item_id) config(): double_map hasher(identity) CollectionId, hasher(twox_64_concat) T::AccountId => FungibleItemType;425        pub ReFungibleItemList get(fn refungible_item_id) config(): double_map hasher(identity) CollectionId, hasher(identity) TokenId => ReFungibleItemType<T::AccountId>;426427        /// Index list428        pub AddressTokens get(fn address_tokens): double_map hasher(identity) CollectionId, hasher(twox_64_concat) T::AccountId => Vec<TokenId>;429430        /// Tokens transfer baskets431        pub CreateItemBasket get(fn create_item_basket): map hasher(twox_64_concat) (CollectionId, T::AccountId) => T::BlockNumber;432        pub NftTransferBasket get(fn nft_transfer_basket): double_map hasher(identity) CollectionId, hasher(identity) TokenId => T::BlockNumber;433        pub FungibleTransferBasket get(fn fungible_transfer_basket): double_map hasher(identity) CollectionId, hasher(twox_64_concat) T::AccountId => T::BlockNumber;434        pub ReFungibleTransferBasket get(fn refungible_transfer_basket): double_map hasher(identity) CollectionId, hasher(identity) TokenId => T::BlockNumber;435436        // Contract Sponsorship and Ownership437        pub ContractOwner get(fn contract_owner): map hasher(twox_64_concat) T::AccountId => T::AccountId;438        pub ContractSelfSponsoring get(fn contract_self_sponsoring): map hasher(twox_64_concat) T::AccountId => bool;439        pub ContractSponsorBasket get(fn contract_sponsor_basket): map hasher(twox_64_concat) (T::AccountId, T::AccountId) => T::BlockNumber;440        pub ContractSponsoringRateLimit get(fn contract_sponsoring_rate_limit): map hasher(twox_64_concat) T::AccountId => T::BlockNumber;441        pub ContractWhiteListEnabled get(fn contract_white_list_enabled): map hasher(twox_64_concat) T::AccountId => bool; 442        pub ContractWhiteList get(fn contract_white_list): double_map hasher(twox_64_concat) T::AccountId, hasher(twox_64_concat) T::AccountId => bool; 443    }444    add_extra_genesis {445        build(|config: &GenesisConfig<T>| {446            // Modification of storage447            for (_num, _c) in &config.collection {448                <Module<T>>::init_collection(_c);449            }450451            for (_num, _c, _i) in &config.nft_item_id {452                <Module<T>>::init_nft_token(*_c, _i);453            }454455            for (collection_id, account_id, fungible_item) in &config.fungible_item_id {456                <Module<T>>::init_fungible_token(*collection_id, account_id, fungible_item);457            }458459            for (_num, _c, _i) in &config.refungible_item_id {460                <Module<T>>::init_refungible_token(*_c, _i);461            }462        })463    }464}465466decl_event!(467    pub enum Event<T>468    where469        AccountId = <T as system::Trait>::AccountId,470    {471        /// New collection was created472        /// 473        /// # Arguments474        /// 475        /// * collection_id: Globally unique identifier of newly created collection.476        /// 477        /// * mode: [CollectionMode] converted into u8.478        /// 479        /// * account_id: Collection owner.480        Created(CollectionId, u8, AccountId),481482        /// New item was created.483        /// 484        /// # Arguments485        /// 486        /// * collection_id: Id of the collection where item was created.487        /// 488        /// * item_id: Id of an item. Unique within the collection.489        ItemCreated(CollectionId, TokenId),490491        /// Collection item was burned.492        /// 493        /// # Arguments494        /// 495        /// collection_id.496        /// 497        /// item_id: Identifier of burned NFT.498        ItemDestroyed(CollectionId, TokenId),499    }500);501502decl_module! {503    pub struct Module<T: Trait> for enum Call where origin: T::Origin {504505        fn deposit_event() = default;506        type Error = Error<T>;507508        fn on_initialize(now: T::BlockNumber) -> Weight {509510            if ChainVersion::get() < 2511            {512                let value = NextCollectionID::get();513                CreatedCollectionCount::put(value);514                ChainVersion::put(2);515            }516517            0518        }519520        /// This method creates a Collection of NFTs. Each Token may have multiple properties encoded as an array of bytes of certain length. The initial owner and admin of the collection are set to the address that signed the transaction. Both addresses can be changed later.521        /// 522        /// # Permissions523        /// 524        /// * Anyone.525        /// 526        /// # Arguments527        /// 528        /// * collection_name: UTF-16 string with collection name (limit 64 characters), will be stored as zero-terminated.529        /// 530        /// * collection_description: UTF-16 string with collection description (limit 256 characters), will be stored as zero-terminated.531        /// 532        /// * token_prefix: UTF-8 string with token prefix.533        /// 534        /// * mode: [CollectionMode] collection type and type dependent data.535        // returns collection ID536        #[weight = T::WeightInfo::create_collection()]537        pub fn create_collection(origin,538                                 collection_name: Vec<u16>,539                                 collection_description: Vec<u16>,540                                 token_prefix: Vec<u8>,541                                 mode: CollectionMode) -> DispatchResult {542543            // Anyone can create a collection544            let who = ensure_signed(origin)?;545546            let decimal_points = match mode {547                CollectionMode::Fungible(points) => points,548                CollectionMode::ReFungible(points) => points,549                _ => 0550            };551552            // bound Total number of collections553            ensure!(CollectionCount::get() < ChainLimit::get().collection_numbers_limit, Error::<T>::TotalCollectionsLimitExceeded);554555            // check params556            ensure!(decimal_points <= MAX_DECIMAL_POINTS, Error::<T>::CollectionDecimalPointLimitExceeded);557            ensure!(collection_name.len() <= 64, Error::<T>::CollectionNameLimitExceeded);558            ensure!(collection_description.len() <= 256, Error::<T>::CollectionDescriptionLimitExceeded);559            ensure!(token_prefix.len() <= 16, Error::<T>::CollectionTokenPrefixLimitExceeded);560561            // Generate next collection ID562            let next_id = CreatedCollectionCount::get()563                .checked_add(1)564                .ok_or(Error::<T>::NumOverflow)?;565566            // bound counter567            let total = CollectionCount::get()568                .checked_add(1)569                .ok_or(Error::<T>::NumOverflow)?;570571            CreatedCollectionCount::put(next_id);572            CollectionCount::put(total);573574            // Create new collection575            let new_collection = CollectionType {576                owner: who.clone(),577                name: collection_name,578                mode: mode.clone(),579                mint_mode: false,580                access: AccessMode::Normal,581                description: collection_description,582                decimal_points: decimal_points,583                token_prefix: token_prefix,584                offchain_schema: Vec::new(),585                schema_version: SchemaVersion::ImageURL,586                sponsor: T::AccountId::default(),587                sponsor_confirmed: false,588                variable_on_chain_schema: Vec::new(),589                const_on_chain_schema: Vec::new(),590                limits: CollectionLimits::default(),591            };592593            // Add new collection to map594            <Collection<T>>::insert(next_id, new_collection);595596            // call event597            Self::deposit_event(RawEvent::Created(next_id, mode.into(), who.clone()));598599            Ok(())600        }601602        /// **DANGEROUS**: Destroys collection and all NFTs within this collection. Users irrecoverably lose their assets and may lose real money.603        /// 604        /// # Permissions605        /// 606        /// * Collection Owner.607        /// 608        /// # Arguments609        /// 610        /// * collection_id: collection to destroy.611        #[weight = T::WeightInfo::destroy_collection()]612        pub fn destroy_collection(origin, collection_id: CollectionId) -> DispatchResult {613614            let sender = ensure_signed(origin)?;615            Self::check_owner_permissions(collection_id, sender)?;616617            <AddressTokens<T>>::remove_prefix(collection_id);618            <Allowances<T>>::remove_prefix(collection_id);619            <Balance<T>>::remove_prefix(collection_id);620            <ItemListIndex>::remove(collection_id);621            <AdminList<T>>::remove(collection_id);622            <Collection<T>>::remove(collection_id);623            <WhiteList<T>>::remove_prefix(collection_id);624625            <NftItemList<T>>::remove_prefix(collection_id);626            <FungibleItemList<T>>::remove_prefix(collection_id);627            <ReFungibleItemList<T>>::remove_prefix(collection_id);628629            <NftTransferBasket<T>>::remove_prefix(collection_id);630            <FungibleTransferBasket<T>>::remove_prefix(collection_id);631            <ReFungibleTransferBasket<T>>::remove_prefix(collection_id);632633            if CollectionCount::get() > 0634            {635                // bound couter636                let total = CollectionCount::get()637                    .checked_sub(1)638                    .ok_or(Error::<T>::NumOverflow)?;639640                CollectionCount::put(total);641            }642643            Ok(())644        }645646        /// Add an address to white list.647        /// 648        /// # Permissions649        /// 650        /// * Collection Owner651        /// * Collection Admin652        /// 653        /// # Arguments654        /// 655        /// * collection_id.656        /// 657        /// * address.658        #[weight = T::WeightInfo::add_to_white_list()]659        pub fn add_to_white_list(origin, collection_id: CollectionId, address: T::AccountId) -> DispatchResult{660661            let sender = ensure_signed(origin)?;662            Self::check_owner_or_admin_permissions(collection_id, sender)?;663664            <WhiteList<T>>::insert(collection_id, address, true);665            666            Ok(())667        }668669        /// Remove an address from white list.670        /// 671        /// # Permissions672        /// 673        /// * Collection Owner674        /// * Collection Admin675        /// 676        /// # Arguments677        /// 678        /// * collection_id.679        /// 680        /// * address.681        #[weight = T::WeightInfo::remove_from_white_list()]682        pub fn remove_from_white_list(origin, collection_id: CollectionId, address: T::AccountId) -> DispatchResult{683684            let sender = ensure_signed(origin)?;685            Self::check_owner_or_admin_permissions(collection_id, sender)?;686687            <WhiteList<T>>::remove(collection_id, address);688689            Ok(())690        }691692        /// Toggle between normal and white list access for the methods with access for `Anyone`.693        /// 694        /// # Permissions695        /// 696        /// * Collection Owner.697        /// 698        /// # Arguments699        /// 700        /// * collection_id.701        /// 702        /// * mode: [AccessMode]703        #[weight = T::WeightInfo::set_public_access_mode()]704        pub fn set_public_access_mode(origin, collection_id: CollectionId, mode: AccessMode) -> DispatchResult705        {706            let sender = ensure_signed(origin)?;707708            Self::check_owner_permissions(collection_id, sender)?;709            let mut target_collection = <Collection<T>>::get(collection_id);710            target_collection.access = mode;711            <Collection<T>>::insert(collection_id, target_collection);712713            Ok(())714        }715716        /// Allows Anyone to create tokens if:717        /// * White List is enabled, and718        /// * Address is added to white list, and719        /// * This method was called with True parameter720        /// 721        /// # Permissions722        /// * Collection Owner723        ///724        /// # Arguments725        /// 726        /// * collection_id.727        /// 728        /// * mint_permission: Boolean parameter. If True, allows minting to Anyone with conditions above.729        #[weight = T::WeightInfo::set_mint_permission()]730        pub fn set_mint_permission(origin, collection_id: CollectionId, mint_permission: bool) -> DispatchResult731        {732            let sender = ensure_signed(origin)?;733734            Self::check_owner_permissions(collection_id, sender)?;735            let mut target_collection = <Collection<T>>::get(collection_id);736            target_collection.mint_mode = mint_permission;737            <Collection<T>>::insert(collection_id, target_collection);738739            Ok(())740        }741742        /// Change the owner of the collection.743        /// 744        /// # Permissions745        /// 746        /// * Collection Owner.747        /// 748        /// # Arguments749        /// 750        /// * collection_id.751        /// 752        /// * new_owner.753        #[weight = T::WeightInfo::change_collection_owner()]754        pub fn change_collection_owner(origin, collection_id: CollectionId, new_owner: T::AccountId) -> DispatchResult {755756            let sender = ensure_signed(origin)?;757            Self::check_owner_permissions(collection_id, sender)?;758            let mut target_collection = <Collection<T>>::get(collection_id);759            target_collection.owner = new_owner;760            <Collection<T>>::insert(collection_id, target_collection);761762            Ok(())763        }764765        /// Adds an admin of the Collection.766        /// 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. 767        /// 768        /// # Permissions769        /// 770        /// * Collection Owner.771        /// * Collection Admin.772        /// 773        /// # Arguments774        /// 775        /// * collection_id: ID of the Collection to add admin for.776        /// 777        /// * new_admin_id: Address of new admin to add.778        #[weight = T::WeightInfo::add_collection_admin()]779        pub fn add_collection_admin(origin, collection_id: CollectionId, new_admin_id: T::AccountId) -> DispatchResult {780781            let sender = ensure_signed(origin)?;782            Self::check_owner_or_admin_permissions(collection_id, sender)?;783            let mut admin_arr: Vec<T::AccountId> = Vec::new();784785            if <AdminList<T>>::contains_key(collection_id)786            {787                admin_arr = <AdminList<T>>::get(collection_id);788                ensure!(!admin_arr.contains(&new_admin_id), Error::<T>::AlreadyAdmin);789            }790791            // Number of collection admins792            ensure!((admin_arr.len() as u64) < ChainLimit::get().collections_admins_limit, Error::<T>::CollectionAdminsLimitExceeded);793794            admin_arr.push(new_admin_id);795            <AdminList<T>>::insert(collection_id, admin_arr);796797            Ok(())798        }799800        /// 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.801        ///802        /// # Permissions803        /// 804        /// * Collection Owner.805        /// * Collection Admin.806        /// 807        /// # Arguments808        /// 809        /// * collection_id: ID of the Collection to remove admin for.810        /// 811        /// * account_id: Address of admin to remove.812        #[weight = T::WeightInfo::remove_collection_admin()]813        pub fn remove_collection_admin(origin, collection_id: CollectionId, account_id: T::AccountId) -> DispatchResult {814815            let sender = ensure_signed(origin)?;816            Self::check_owner_or_admin_permissions(collection_id, sender)?;817            ensure!(<AdminList<T>>::contains_key(collection_id), Error::<T>::AdminNotFound);818819            let mut admin_arr = <AdminList<T>>::get(collection_id);820            admin_arr.retain(|i| *i != account_id);821            <AdminList<T>>::insert(collection_id, admin_arr);822823            Ok(())824        }825826        /// # Permissions827        /// 828        /// * Collection Owner829        /// 830        /// # Arguments831        /// 832        /// * collection_id.833        /// 834        /// * new_sponsor.835        #[weight = T::WeightInfo::set_collection_sponsor()]836        pub fn set_collection_sponsor(origin, collection_id: CollectionId, new_sponsor: T::AccountId) -> DispatchResult {837838            let sender = ensure_signed(origin)?;839            ensure!(<Collection<T>>::contains_key(collection_id), Error::<T>::CollectionNotFound);840841            let mut target_collection = <Collection<T>>::get(collection_id);842            ensure!(sender == target_collection.owner, Error::<T>::NoPermission);843844            target_collection.sponsor = new_sponsor;845            target_collection.sponsor_confirmed = false;846            <Collection<T>>::insert(collection_id, target_collection);847848            Ok(())849        }850851        /// # Permissions852        /// 853        /// * Sponsor.854        /// 855        /// # Arguments856        /// 857        /// * collection_id.858        #[weight = T::WeightInfo::confirm_sponsorship()]859        pub fn confirm_sponsorship(origin, collection_id: CollectionId) -> DispatchResult {860861            let sender = ensure_signed(origin)?;862            ensure!(<Collection<T>>::contains_key(collection_id), Error::<T>::CollectionNotFound);863864            let mut target_collection = <Collection<T>>::get(collection_id);865            ensure!(sender == target_collection.sponsor, Error::<T>::ConfirmUnsetSponsorFail);866867            target_collection.sponsor_confirmed = true;868            <Collection<T>>::insert(collection_id, target_collection);869870            Ok(())871        }872873        /// Switch back to pay-per-own-transaction model.874        ///875        /// # Permissions876        ///877        /// * Collection owner.878        /// 879        /// # Arguments880        /// 881        /// * collection_id.882        #[weight = T::WeightInfo::remove_collection_sponsor()]883        pub fn remove_collection_sponsor(origin, collection_id: CollectionId) -> DispatchResult {884885            let sender = ensure_signed(origin)?;886            ensure!(<Collection<T>>::contains_key(collection_id), Error::<T>::CollectionNotFound);887888            let mut target_collection = <Collection<T>>::get(collection_id);889            ensure!(sender == target_collection.owner, Error::<T>::NoPermission);890891            target_collection.sponsor = T::AccountId::default();892            target_collection.sponsor_confirmed = false;893            <Collection<T>>::insert(collection_id, target_collection);894895            Ok(())896        }897898        /// This method creates a concrete instance of NFT Collection created with CreateCollection method.899        /// 900        /// # Permissions901        /// 902        /// * Collection Owner.903        /// * Collection Admin.904        /// * Anyone if905        ///     * White List is enabled, and906        ///     * Address is added to white list, and907        ///     * MintPermission is enabled (see SetMintPermission method)908        /// 909        /// # Arguments910        /// 911        /// * collection_id: ID of the collection.912        /// 913        /// * owner: Address, initial owner of the NFT.914        ///915        /// * data: Token data to store on chain.916        // #[weight =917        // (130_000_000 as Weight)918        // .saturating_add((2135 as Weight).saturating_mul((properties.len() as u64) as Weight))919        // .saturating_add(RocksDbWeight::get().reads(10 as Weight))920        // .saturating_add(RocksDbWeight::get().writes(8 as Weight))]921922        #[weight = T::WeightInfo::create_item(data.len())]923        pub fn create_item(origin, collection_id: CollectionId, owner: T::AccountId, data: CreateItemData) -> DispatchResult {924925            let sender = ensure_signed(origin)?;926927            Self::collection_exists(collection_id)?;928929            let target_collection = <Collection<T>>::get(collection_id);930931            Self::can_create_items_in_collection(collection_id, &target_collection, &sender, &owner)?;932            Self::validate_create_item_args(&target_collection, &data)?;933            Self::create_item_no_validation(collection_id, &target_collection, owner, data)?;934935            Ok(())936        }937938        /// This method creates multiple instances of NFT Collection created with CreateCollection method.939        /// 940        /// # Permissions941        /// 942        /// * Collection Owner.943        /// * Collection Admin.944        /// * Anyone if945        ///     * White List is enabled, and946        ///     * Address is added to white list, and947        ///     * MintPermission is enabled (see SetMintPermission method)948        /// 949        /// # Arguments950        /// 951        /// * collection_id: ID of the collection.952        /// 953        /// * itemsData: Array items properties. Each property is an array of bytes itself, see [create_item].954        /// 955        /// * owner: Address, initial owner of the NFT.956        #[weight = T::WeightInfo::create_item(items_data.into_iter()957                               .map(|data| { data.len() })958                               .sum())]959        pub fn create_multiple_items(origin, collection_id: CollectionId, owner: T::AccountId, items_data: Vec<CreateItemData>) -> DispatchResult {960961            ensure!(items_data.len() > 0, Error::<T>::EmptyArgument);962            let sender = ensure_signed(origin)?;963964            Self::collection_exists(collection_id)?;965            let target_collection = <Collection<T>>::get(collection_id);966967            Self::can_create_items_in_collection(collection_id, &target_collection, &sender, &owner)?;968969            for data in &items_data {970                Self::validate_create_item_args(&target_collection, data)?;971            }972            for data in &items_data {973                Self::create_item_no_validation(collection_id, &target_collection, owner.clone(), data.clone())?;974            }975976            Ok(())977        }978979        /// Destroys a concrete instance of NFT.980        /// 981        /// # Permissions982        /// 983        /// * Collection Owner.984        /// * Collection Admin.985        /// * Current NFT Owner.986        /// 987        /// # Arguments988        /// 989        /// * collection_id: ID of the collection.990        /// 991        /// * item_id: ID of NFT to burn.992        #[weight = T::WeightInfo::burn_item()]993        pub fn burn_item(origin, collection_id: CollectionId, item_id: TokenId, value: u128) -> DispatchResult {994995            let sender = ensure_signed(origin)?;996            Self::collection_exists(collection_id)?;997998            // Transfer permissions check999            let target_collection = <Collection<T>>::get(collection_id);1000            ensure!(Self::is_item_owner(sender.clone(), collection_id, item_id) ||1001                Self::is_owner_or_admin_permissions(collection_id, sender.clone()),1002                Error::<T>::NoPermission);10031004            if target_collection.access == AccessMode::WhiteList {1005                Self::check_white_list(collection_id, &sender)?;1006            }10071008            match target_collection.mode1009            {1010                CollectionMode::NFT => Self::burn_nft_item(collection_id, item_id)?,1011                CollectionMode::Fungible(_)  => Self::burn_fungible_item(&sender, collection_id, value)?,1012                CollectionMode::ReFungible(_)  => Self::burn_refungible_item(collection_id, item_id, sender.clone())?,1013                _ => ()1014            };10151016            // call event1017            Self::deposit_event(RawEvent::ItemDestroyed(collection_id, item_id));10181019            Ok(())1020        }10211022        /// Change ownership of the token.1023        /// 1024        /// # Permissions1025        /// 1026        /// * Collection Owner1027        /// * Collection Admin1028        /// * Current NFT owner1029        ///1030        /// # Arguments1031        /// 1032        /// * recipient: Address of token recipient.1033        /// 1034        /// * collection_id.1035        /// 1036        /// * item_id: ID of the item1037        ///     * Non-Fungible Mode: Required.1038        ///     * Fungible Mode: Ignored.1039        ///     * Re-Fungible Mode: Required.1040        /// 1041        /// * value: Amount to transfer.1042        ///     * Non-Fungible Mode: Ignored1043        ///     * Fungible Mode: Must specify transferred amount1044        ///     * Re-Fungible Mode: Must specify transferred portion (between 0 and 1)1045        #[weight = T::WeightInfo::transfer()]1046        pub fn transfer(origin, recipient: T::AccountId, collection_id: CollectionId, item_id: TokenId, value: u128) -> DispatchResult {10471048            let sender = ensure_signed(origin)?;1049            let target_collection = <Collection<T>>::get(collection_id);10501051            // Limits check1052            Self::is_correct_transfer(collection_id, &target_collection, &recipient)?;10531054            // Transfer permissions check1055            ensure!(Self::is_item_owner(sender.clone(), collection_id, item_id) ||1056                Self::is_owner_or_admin_permissions(collection_id, sender.clone()),1057                Error::<T>::NoPermission);10581059            if target_collection.access == AccessMode::WhiteList {1060                Self::check_white_list(collection_id, &sender)?;1061                Self::check_white_list(collection_id, &recipient)?;1062            }10631064            match target_collection.mode1065            {1066                CollectionMode::NFT => Self::transfer_nft(collection_id, item_id, sender.clone(), recipient)?,1067                CollectionMode::Fungible(_)  => Self::transfer_fungible(collection_id, value, &sender, &recipient)?,1068                CollectionMode::ReFungible(_)  => Self::transfer_refungible(collection_id, item_id, value, sender.clone(), recipient)?,1069                _ => ()1070            };10711072            Ok(())1073        }10741075        /// Set, change, or remove approved address to transfer the ownership of the NFT.1076        /// 1077        /// # Permissions1078        /// 1079        /// * Collection Owner1080        /// * Collection Admin1081        /// * Current NFT owner1082        /// 1083        /// # Arguments1084        /// 1085        /// * approved: Address that is approved to transfer this NFT or zero (if needed to remove approval).1086        /// 1087        /// * collection_id.1088        /// 1089        /// * item_id: ID of the item.1090        #[weight = T::WeightInfo::approve()]1091        pub fn approve(origin, spender: T::AccountId, collection_id: CollectionId, item_id: TokenId, amount: u128) -> DispatchResult {10921093            let sender = ensure_signed(origin)?;10941095            // Transfer permissions check1096            let target_collection = <Collection<T>>::get(collection_id);1097            ensure!(Self::is_item_owner(sender.clone(), collection_id, item_id) ||1098                Self::is_owner_or_admin_permissions(collection_id, sender.clone()),1099                Error::<T>::NoPermission);11001101            if target_collection.access == AccessMode::WhiteList {1102                Self::check_white_list(collection_id, &sender)?;1103                Self::check_white_list(collection_id, &spender)?;1104            }11051106            let allowance_exists = <Allowances<T>>::contains_key(collection_id, (item_id, &sender, &spender));1107            let mut allowance: u128 = amount;1108            if allowance_exists {1109                allowance += <Allowances<T>>::get(collection_id, (item_id, &sender, &spender));1110            }1111            <Allowances<T>>::insert(collection_id, (item_id, sender.clone(), spender.clone()), allowance);11121113            Ok(())1114        }1115        1116        /// 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.1117        /// 1118        /// # Permissions1119        /// * Collection Owner1120        /// * Collection Admin1121        /// * Current NFT owner1122        /// * Address approved by current NFT owner1123        /// 1124        /// # Arguments1125        /// 1126        /// * from: Address that owns token.1127        /// 1128        /// * recipient: Address of token recipient.1129        /// 1130        /// * collection_id.1131        /// 1132        /// * item_id: ID of the item.1133        /// 1134        /// * value: Amount to transfer.1135        #[weight = T::WeightInfo::transfer_from()]1136        pub fn transfer_from(origin, from: T::AccountId, recipient: T::AccountId, collection_id: CollectionId, item_id: TokenId, value: u128 ) -> DispatchResult {11371138            let sender = ensure_signed(origin)?;1139            let mut appoved_transfer = false;11401141            // Check approval1142            let mut approval: u128 = 0;1143            if <Allowances<T>>::contains_key(collection_id, (item_id, &from, &recipient)) {1144                approval = <Allowances<T>>::get(collection_id, (item_id, &from, &recipient));1145                ensure!(approval >= value, Error::<T>::TokenValueNotEnough);1146                appoved_transfer = true;1147            }11481149            let target_collection = <Collection<T>>::get(collection_id);11501151            // Limits check1152            Self::is_correct_transfer(collection_id, &target_collection, &recipient)?;11531154            // Transfer permissions check         1155            ensure!(appoved_transfer || Self::is_owner_or_admin_permissions(collection_id, sender.clone()),1156                Error::<T>::NoPermission);11571158            if target_collection.access == AccessMode::WhiteList {1159                Self::check_white_list(collection_id, &sender)?;1160                Self::check_white_list(collection_id, &recipient)?;1161            }11621163            // Reduce approval by transferred amount or remove if remaining approval drops to 01164            if approval.checked_sub(value).unwrap_or(0) > 0 {1165                <Allowances<T>>::insert(collection_id, (item_id, &from, &recipient), approval - value);1166            }1167            else {1168                <Allowances<T>>::remove(collection_id, (item_id, &from, &recipient));1169            }11701171            match target_collection.mode1172            {1173                CollectionMode::NFT => Self::transfer_nft(collection_id, item_id, from, recipient)?,1174                CollectionMode::Fungible(_)  => Self::transfer_fungible(collection_id, value, &from, &recipient)?,1175                CollectionMode::ReFungible(_)  => Self::transfer_refungible(collection_id, item_id, value, from.clone(), recipient)?,1176                _ => ()1177            };11781179            Ok(())1180        }11811182        #[weight = 0]1183        pub fn safe_transfer_from(origin, collection_id: CollectionId, item_id: TokenId, new_owner: T::AccountId) -> DispatchResult {11841185            // let no_perm_mes = "You do not have permissions to modify this collection";1186            // ensure!(<ApprovedList<T>>::contains_key((collection_id, item_id)), no_perm_mes);1187            // let list_itm = <ApprovedList<T>>::get((collection_id, item_id));1188            // ensure!(list_itm.contains(&new_owner.clone()), no_perm_mes);11891190            // // on_nft_received  call11911192            // Self::transfer(origin, collection_id, item_id, new_owner)?;11931194            Ok(())1195        }11961197        /// Set off-chain data schema.1198        /// 1199        /// # Permissions1200        /// 1201        /// * Collection Owner1202        /// * Collection Admin1203        /// 1204        /// # Arguments1205        /// 1206        /// * collection_id.1207        /// 1208        /// * schema: String representing the offchain data schema.1209        #[weight = T::WeightInfo::set_variable_meta_data()]1210        pub fn set_variable_meta_data (1211            origin,1212            collection_id: CollectionId,1213            item_id: TokenId,1214            data: Vec<u8>1215        ) -> DispatchResult {1216            let sender = ensure_signed(origin)?;1217            1218            Self::collection_exists(collection_id)?;1219            1220            ensure!(ChainLimit::get().custom_data_limit >= data.len() as u32, Error::<T>::TokenVariableDataLimitExceeded);12211222            // Modify permissions check1223            let target_collection = <Collection<T>>::get(collection_id);1224            ensure!(Self::is_item_owner(sender.clone(), collection_id, item_id) ||1225                Self::is_owner_or_admin_permissions(collection_id, sender.clone()),1226                Error::<T>::NoPermission);12271228            Self::item_exists(collection_id, item_id, &target_collection.mode)?;12291230            match target_collection.mode1231            {1232                CollectionMode::NFT => Self::set_nft_variable_data(collection_id, item_id, data)?,1233                CollectionMode::ReFungible(_)  => Self::set_re_fungible_variable_data(collection_id, item_id, data)?,1234                CollectionMode::Fungible(_) => fail!(Error::<T>::CantStoreMetadataInFungibleTokens),1235                _ => fail!(Error::<T>::UnexpectedCollectionType)1236            };12371238            Ok(())1239        }1240 1241        /// Set schema standard1242        /// ImageURL1243        /// Unique1244        /// 1245        /// # Permissions1246        /// 1247        /// * Collection Owner1248        /// * Collection Admin1249        /// 1250        /// # Arguments1251        /// 1252        /// * collection_id.1253        /// 1254        /// * schema: SchemaVersion: enum1255        #[weight = T::WeightInfo::set_schema_version()]1256        pub fn set_schema_version(1257            origin,1258            collection_id: CollectionId,1259            version: SchemaVersion1260        ) -> DispatchResult {1261            let sender = ensure_signed(origin)?;1262            Self::check_owner_or_admin_permissions(collection_id, sender.clone())?;1263            let mut target_collection = <Collection<T>>::get(collection_id);1264            target_collection.schema_version = version;1265            <Collection<T>>::insert(collection_id, target_collection);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::WeightInfo::set_offchain_schema()]1283        pub fn set_offchain_schema(1284            origin,1285            collection_id: CollectionId,1286            schema: Vec<u8>1287        ) -> DispatchResult {1288            let sender = ensure_signed(origin)?;1289            Self::check_owner_or_admin_permissions(collection_id, sender.clone())?;12901291            // check schema limit1292            ensure!(schema.len() as u32 > ChainLimit::get().offchain_schema_limit, "");12931294            let mut target_collection = <Collection<T>>::get(collection_id);1295            target_collection.offchain_schema = schema;1296            <Collection<T>>::insert(collection_id, target_collection);12971298            Ok(())1299        }13001301        /// Set const on-chain data schema.1302        /// 1303        /// # Permissions1304        /// 1305        /// * Collection Owner1306        /// * Collection Admin1307        /// 1308        /// # Arguments1309        /// 1310        /// * collection_id.1311        /// 1312        /// * schema: String representing the const on-chain data schema.1313        #[weight = T::WeightInfo::set_const_on_chain_schema()]1314        pub fn set_const_on_chain_schema (1315            origin,1316            collection_id: CollectionId,1317            schema: Vec<u8>1318        ) -> DispatchResult {1319            let sender = ensure_signed(origin)?;1320            Self::check_owner_or_admin_permissions(collection_id, sender.clone())?;13211322            // check schema limit1323            ensure!(schema.len() as u32 > ChainLimit::get().const_on_chain_schema_limit, "");13241325            let mut target_collection = <Collection<T>>::get(collection_id);1326            target_collection.const_on_chain_schema = schema;1327            <Collection<T>>::insert(collection_id, target_collection);13281329            Ok(())1330        }13311332        /// Set variable on-chain data schema.1333        /// 1334        /// # Permissions1335        /// 1336        /// * Collection Owner1337        /// * Collection Admin1338        /// 1339        /// # Arguments1340        /// 1341        /// * collection_id.1342        /// 1343        /// * schema: String representing the variable on-chain data schema.1344        #[weight = T::WeightInfo::set_const_on_chain_schema()]1345        pub fn set_variable_on_chain_schema (1346            origin,1347            collection_id: CollectionId,1348            schema: Vec<u8>1349        ) -> DispatchResult {1350            let sender = ensure_signed(origin)?;1351            Self::check_owner_or_admin_permissions(collection_id, sender.clone())?;13521353            // check schema limit1354            ensure!(schema.len() as u32 > ChainLimit::get().variable_on_chain_schema_limit, "");13551356            let mut target_collection = <Collection<T>>::get(collection_id);1357            target_collection.variable_on_chain_schema = schema;1358            <Collection<T>>::insert(collection_id, target_collection);13591360            Ok(())1361        }13621363        // Sudo permissions function1364        #[weight = T::WeightInfo::set_chain_limits()]1365        pub fn set_chain_limits(1366            origin,1367            limits: ChainLimits1368        ) -> DispatchResult {13691370            #[cfg(not(feature = "runtime-benchmarks"))]1371            ensure_root(origin)?;13721373            <ChainLimit>::put(limits);1374            Ok(())1375        }13761377        /// Enable smart contract self-sponsoring.1378        /// 1379        /// # Permissions1380        /// 1381        /// * Contract Owner1382        /// 1383        /// # Arguments1384        /// 1385        /// * contract address1386        /// * enable flag1387        /// 1388        #[weight = T::WeightInfo::enable_contract_sponsoring()]1389        pub fn enable_contract_sponsoring(1390            origin,1391            contract_address: T::AccountId,1392            enable: bool1393        ) -> DispatchResult {13941395            let sender = ensure_signed(origin)?;13961397            #[cfg(feature = "runtime-benchmarks")]1398            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());13991400            Self::ensure_contract_owned(sender, &contract_address)?;14011402            <ContractSelfSponsoring<T>>::insert(contract_address, enable);1403            Ok(())1404        }14051406        /// Set the rate limit for contract sponsoring to specified number of blocks.1407        /// 1408        /// If not set (has the default value of 0 blocks), the sponsoring will be disabled. 1409        /// If set to the number B (for blocks), the transactions will be sponsored with a rate 1410        /// limit of B, i.e. fees for every transaction sent to this smart contract will be paid 1411        /// from contract endowment if there are at least B blocks between such transactions. 1412        /// Nonetheless, if transactions are sent more frequently, the fees are paid by the sender.1413        /// 1414        /// # Permissions1415        /// 1416        /// * Contract Owner1417        /// 1418        /// # Arguments1419        /// 1420        /// -`contract_address`: Address of the contract to sponsor1421        /// -`rate_limit`: Number of blocks to wait until the next sponsored transaction is allowed1422        /// 1423        #[weight = T::WeightInfo::set_contract_sponsoring_rate_limit()]1424        pub fn set_contract_sponsoring_rate_limit(1425            origin,1426            contract_address: T::AccountId,1427            rate_limit: T::BlockNumber1428        ) -> DispatchResult {1429            let sender = ensure_signed(origin)?;14301431            #[cfg(feature = "runtime-benchmarks")]1432            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());14331434            Self::ensure_contract_owned(sender, &contract_address)?;1435            <ContractSponsoringRateLimit<T>>::insert(contract_address, rate_limit);1436            Ok(())1437        }14381439        /// Enable the white list for a contract. Only addresses added to the white list with addToContractWhiteList will be able to call this smart contract.1440        /// 1441        /// # Permissions1442        /// 1443        /// * Address that deployed smart contract.1444        /// 1445        /// # Arguments1446        /// 1447        /// -`contract_address`: Address of the contract.1448        /// 1449        /// - `enable`: .  1450        #[weight = T::WeightInfo::toggle_contract_white_list()]1451        pub fn toggle_contract_white_list(1452            origin,1453            contract_address: T::AccountId,1454            enable: bool1455        ) -> DispatchResult {1456            let sender = ensure_signed(origin)?;14571458            #[cfg(feature = "runtime-benchmarks")]1459            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());14601461            Self::ensure_contract_owned(sender, &contract_address)?;1462            <ContractWhiteListEnabled<T>>::insert(contract_address, enable);1463            Ok(())1464        }1465        1466        /// Add an address to smart contract white list.1467        /// 1468        /// # Permissions1469        /// 1470        /// * Address that deployed smart contract.1471        /// 1472        /// # Arguments1473        /// 1474        /// -`contract_address`: Address of the contract.1475        ///1476        /// -`account_address`: Address to add.1477        #[weight = T::WeightInfo::add_to_contract_white_list()]1478        pub fn add_to_contract_white_list(1479            origin,1480            contract_address: T::AccountId,1481            account_address: T::AccountId1482        ) -> DispatchResult {1483            let sender = ensure_signed(origin)?;14841485            #[cfg(feature = "runtime-benchmarks")]1486            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());1487            1488            Self::ensure_contract_owned(sender, &contract_address)?;      1489            <ContractWhiteList<T>>::insert(contract_address, account_address, true);1490            Ok(())1491        }14921493        /// Remove an address from smart contract white list.1494        /// 1495        /// # Permissions1496        /// 1497        /// * Address that deployed smart contract.1498        /// 1499        /// # Arguments1500        /// 1501        /// -`contract_address`: Address of the contract.1502        ///1503        /// -`account_address`: Address to remove.1504        #[weight = T::WeightInfo::remove_from_contract_white_list()]1505        pub fn remove_from_contract_white_list(1506            origin,1507            contract_address: T::AccountId,1508            account_address: T::AccountId1509        ) -> DispatchResult {1510            let sender = ensure_signed(origin)?;15111512            #[cfg(feature = "runtime-benchmarks")]1513            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());15141515            Self::ensure_contract_owned(sender, &contract_address)?;1516            <ContractWhiteList<T>>::remove(contract_address, account_address);1517            Ok(())1518        }15191520        #[weight = T::WeightInfo::set_collection_limits()]1521        pub fn set_collection_limits(1522            origin,1523            collection_id: u32,1524            limits: CollectionLimits,1525        ) -> DispatchResult {1526            let sender = ensure_signed(origin)?;1527            Self::check_owner_permissions(collection_id, sender.clone())?;1528            let mut target_collection = <Collection<T>>::get(collection_id);1529            let chain_limits = ChainLimit::get();1530            let climits = target_collection.limits;15311532            // collection bounds1533            ensure!(limits.sponsor_transfer_timeout <= MAX_SPONSOR_TIMEOUT &&1534                limits.account_token_ownership_limit <= MAX_TOKEN_OWNERSHIP,  1535                Error::<T>::CollectionLimitBoundsExceeded);15361537            // token_limit   check  prev1538            ensure!(climits.token_limit > limits.token_limit && 1539                limits.token_limit <= chain_limits.account_token_ownership_limit, 1540                Error::<T>::AccountTokenLimitExceeded);15411542            target_collection.limits = limits;1543            <Collection<T>>::insert(collection_id, target_collection);15441545            Ok(())1546        } 1547    }1548}15491550impl<T: Trait> Module<T> {15511552    fn is_correct_transfer(collection_id: CollectionId, collection: &CollectionType<T::AccountId>, recipient: &T::AccountId) -> DispatchResult {15531554        // check token limit and account token limit1555        let account_items: u32 = <AddressTokens<T>>::get(collection_id, recipient).len() as u32;1556        ensure!(collection.limits.account_token_ownership_limit > account_items,  Error::<T>::AccountTokenLimitExceeded);1557        1558        Ok(())1559    }15601561    fn can_create_items_in_collection(collection_id: CollectionId, collection: &CollectionType<T::AccountId>, sender: &T::AccountId, owner: &T::AccountId) -> DispatchResult {15621563        // check token limit and account token limit1564        let total_items: u32 = ItemListIndex::get(collection_id);1565        let account_items: u32 = <AddressTokens<T>>::get(collection_id, owner).len() as u32;1566        ensure!(collection.limits.token_limit > total_items,  Error::<T>::CollectionTokenLimitExceeded);1567        ensure!(collection.limits.account_token_ownership_limit > account_items,  Error::<T>::AccountTokenLimitExceeded);15681569        if !Self::is_owner_or_admin_permissions(collection_id, sender.clone()) {1570            ensure!(collection.mint_mode == true, Error::<T>::PublicMintingNotAllowed);1571            Self::check_white_list(collection_id, owner)?;1572            Self::check_white_list(collection_id, sender)?;1573        }15741575        Ok(())1576    }15771578    fn validate_create_item_args(target_collection: &CollectionType<T::AccountId>, data: &CreateItemData) -> DispatchResult {1579        match target_collection.mode1580        {1581            CollectionMode::NFT => {1582                if let CreateItemData::NFT(data) = data {1583                    // check sizes1584                    ensure!(ChainLimit::get().custom_data_limit >= data.const_data.len() as u32, Error::<T>::TokenConstDataLimitExceeded);1585                    ensure!(ChainLimit::get().custom_data_limit >= data.variable_data.len() as u32, Error::<T>::TokenVariableDataLimitExceeded);1586                } else {1587                    fail!(Error::<T>::NotNftDataUsedToMintNftCollectionToken);1588                }1589            },1590            CollectionMode::Fungible(_) => {1591                if let CreateItemData::Fungible(_) = data {1592                } else {1593                    fail!(Error::<T>::NotFungibleDataUsedToMintFungibleCollectionToken);1594                }1595            },1596            CollectionMode::ReFungible(_) => {1597                if let CreateItemData::ReFungible(data) = data {15981599                    // check sizes1600                    ensure!(ChainLimit::get().custom_data_limit >= data.const_data.len() as u32, Error::<T>::TokenConstDataLimitExceeded);1601                    ensure!(ChainLimit::get().custom_data_limit >= data.variable_data.len() as u32, Error::<T>::TokenVariableDataLimitExceeded);1602                } else {1603                    fail!(Error::<T>::NotReFungibleDataUsedToMintReFungibleCollectionToken);1604                }1605            },1606            _ => { fail!(Error::<T>::UnexpectedCollectionType); }1607        };16081609        Ok(())1610    }16111612    fn create_item_no_validation(collection_id: CollectionId, collection: &CollectionType<T::AccountId>, owner: T::AccountId, data: CreateItemData) -> DispatchResult {1613        match data1614        {1615            CreateItemData::NFT(data) => {1616                let item = NftItemType {1617                    owner,1618                    const_data: data.const_data,1619                    variable_data: data.variable_data1620                };16211622                Self::add_nft_item(collection_id, item)?;1623            },1624            CreateItemData::Fungible(data) => {1625                Self::add_fungible_item(collection_id, &owner, data.value)?;1626            },1627            CreateItemData::ReFungible(data) => {1628                let mut owner_list = Vec::new();1629                let value = (10 as u128).pow(collection.decimal_points as u32);1630                owner_list.push(Ownership {owner: owner.clone(), fraction: value});16311632                let item = ReFungibleItemType {1633                    owner: owner_list,1634                    const_data: data.const_data,1635                    variable_data: data.variable_data1636                };16371638                Self::add_refungible_item(collection_id, item)?;1639            }1640        };16411642        // call event1643        Self::deposit_event(RawEvent::ItemCreated(collection_id, <ItemListIndex>::get(collection_id)));16441645        Ok(())1646    }16471648    fn add_fungible_item(collection_id: CollectionId, owner: &T::AccountId, value: u128) -> DispatchResult {16491650        // Does new owner already have an account?1651        let mut balance: u128 = 0;1652        if <FungibleItemList<T>>::contains_key(collection_id, owner) {1653            balance = <FungibleItemList<T>>::get(collection_id, owner).value;1654        } 16551656        // Mint 1657        let item = FungibleItemType {1658            value: balance + value1659        };1660        <FungibleItemList<T>>::insert(collection_id, (*owner).clone(), item);16611662        // Update balance1663        let new_balance = <Balance<T>>::get(collection_id, owner)1664            .checked_add(value)1665            .ok_or(Error::<T>::NumOverflow)?;1666        <Balance<T>>::insert(collection_id, (*owner).clone(), new_balance);16671668        Ok(())1669    }16701671    fn add_refungible_item(collection_id: CollectionId, item: ReFungibleItemType<T::AccountId>) -> DispatchResult {1672        let current_index = <ItemListIndex>::get(collection_id)1673            .checked_add(1)1674            .ok_or(Error::<T>::NumOverflow)?;1675        let itemcopy = item.clone();16761677        let value = item.owner.first().unwrap().fraction;1678        let owner = item.owner.first().unwrap().owner.clone();16791680        Self::add_token_index(collection_id, current_index, owner.clone())?;16811682        <ItemListIndex>::insert(collection_id, current_index);1683        <ReFungibleItemList<T>>::insert(collection_id, current_index, itemcopy);16841685        // Update balance1686        let new_balance = <Balance<T>>::get(collection_id, owner.clone())1687            .checked_add(value)1688            .ok_or(Error::<T>::NumOverflow)?;1689        <Balance<T>>::insert(collection_id, owner.clone(), new_balance);16901691        Ok(())1692    }16931694    fn add_nft_item(collection_id: CollectionId, item: NftItemType<T::AccountId>) -> DispatchResult {1695        let current_index = <ItemListIndex>::get(collection_id)1696            .checked_add(1)1697            .ok_or(Error::<T>::NumOverflow)?;16981699        let item_owner = item.owner.clone();1700        Self::add_token_index(collection_id, current_index, item.owner.clone())?;17011702        <ItemListIndex>::insert(collection_id, current_index);1703        <NftItemList<T>>::insert(collection_id, current_index, item);17041705        // Update balance1706        let new_balance = <Balance<T>>::get(collection_id, item_owner.clone())1707            .checked_add(1)1708            .ok_or(Error::<T>::NumOverflow)?;1709        <Balance<T>>::insert(collection_id, item_owner.clone(), new_balance);17101711        Ok(())1712    }17131714    fn burn_refungible_item(1715        collection_id: CollectionId,1716        item_id: TokenId,1717        owner: T::AccountId,1718    ) -> DispatchResult {1719        ensure!(1720            <ReFungibleItemList<T>>::contains_key(collection_id, item_id),1721            Error::<T>::TokenNotFound1722        );1723        let collection = <ReFungibleItemList<T>>::get(collection_id, item_id);1724        let item = collection1725            .owner1726            .iter()1727            .filter(|&i| i.owner == owner)1728            .next()1729            .unwrap();1730        Self::remove_token_index(collection_id, item_id, owner.clone())?;17311732        // update balance1733        let new_balance = <Balance<T>>::get(collection_id, item.owner.clone())1734            .checked_sub(item.fraction)1735            .ok_or(Error::<T>::NumOverflow)?;1736        <Balance<T>>::insert(collection_id, item.owner.clone(), new_balance);17371738        <ReFungibleItemList<T>>::remove(collection_id, item_id);17391740        Ok(())1741    }17421743    fn burn_nft_item(collection_id: CollectionId, item_id: TokenId) -> DispatchResult {1744        ensure!(1745            <NftItemList<T>>::contains_key(collection_id, item_id),1746            Error::<T>::TokenNotFound1747        );1748        let item = <NftItemList<T>>::get(collection_id, item_id);1749        Self::remove_token_index(collection_id, item_id, item.owner.clone())?;17501751        // update balance1752        let new_balance = <Balance<T>>::get(collection_id, item.owner.clone())1753            .checked_sub(1)1754            .ok_or(Error::<T>::NumOverflow)?;1755        <Balance<T>>::insert(collection_id, item.owner.clone(), new_balance);1756        <NftItemList<T>>::remove(collection_id, item_id);17571758        Ok(())1759    }17601761    fn burn_fungible_item(owner: &T::AccountId, collection_id: CollectionId, value: u128) -> DispatchResult {1762        ensure!(1763            <FungibleItemList<T>>::contains_key(collection_id, owner),1764            Error::<T>::TokenNotFound1765        );1766        let mut balance = <FungibleItemList<T>>::get(collection_id, owner);1767        ensure!(balance.value >= value, Error::<T>::TokenValueNotEnough);17681769        // update balance1770        let new_balance = <Balance<T>>::get(collection_id, owner)1771            .checked_sub(value)1772            .ok_or(Error::<T>::NumOverflow)?;1773        <Balance<T>>::insert(collection_id, (*owner).clone(), new_balance);17741775        if balance.value - value > 0 {1776            balance.value -= value;1777            <FungibleItemList<T>>::insert(collection_id, (*owner).clone(), balance);1778        }1779        else {1780            <FungibleItemList<T>>::remove(collection_id, owner);1781        }17821783        Ok(())1784    }17851786    fn collection_exists(collection_id: CollectionId) -> DispatchResult {1787        ensure!(1788            <Collection<T>>::contains_key(collection_id),1789            Error::<T>::CollectionNotFound1790        );1791        Ok(())1792    }17931794    fn check_owner_permissions(collection_id: CollectionId, subject: T::AccountId) -> DispatchResult {1795        Self::collection_exists(collection_id)?;17961797        let target_collection = <Collection<T>>::get(collection_id);1798        ensure!(1799            subject == target_collection.owner,1800            Error::<T>::NoPermission1801        );18021803        Ok(())1804    }18051806    fn is_owner_or_admin_permissions(collection_id: CollectionId, subject: T::AccountId) -> bool {1807        let target_collection = <Collection<T>>::get(collection_id);1808        let mut result: bool = subject == target_collection.owner;1809        let exists = <AdminList<T>>::contains_key(collection_id);18101811        if !result & exists {1812            if <AdminList<T>>::get(collection_id).contains(&subject) {1813                result = true1814            }1815        }18161817        result1818    }18191820    fn check_owner_or_admin_permissions(1821        collection_id: CollectionId,1822        subject: T::AccountId,1823    ) -> DispatchResult {1824        Self::collection_exists(collection_id)?;1825        let result = Self::is_owner_or_admin_permissions(collection_id, subject.clone());18261827        ensure!(1828            result,1829            Error::<T>::NoPermission1830        );1831        Ok(())1832    }18331834    fn is_item_owner(subject: T::AccountId, collection_id: CollectionId, item_id: TokenId) -> bool {1835        let target_collection = <Collection<T>>::get(collection_id);18361837        match target_collection.mode {1838            CollectionMode::NFT => {1839                <NftItemList<T>>::get(collection_id, item_id).owner == subject1840            }1841            CollectionMode::Fungible(_) => {1842                <FungibleItemList<T>>::contains_key(collection_id, &subject)1843            }1844            CollectionMode::ReFungible(_) => {1845                <ReFungibleItemList<T>>::get(collection_id, item_id)1846                    .owner1847                    .iter()1848                    .any(|i| i.owner == subject)1849            }1850            CollectionMode::Invalid => false,1851        }1852    }18531854    fn check_white_list(collection_id: CollectionId, address: &T::AccountId) -> DispatchResult {1855        let mes = Error::<T>::AddresNotInWhiteList;1856        ensure!(<WhiteList<T>>::contains_key(collection_id, address), mes);18571858        Ok(())1859    }18601861    fn transfer_fungible(1862        collection_id: CollectionId,1863        value: u128,1864        owner: &T::AccountId,1865        recipient: &T::AccountId,1866    ) -> DispatchResult {1867        ensure!(1868            <FungibleItemList<T>>::contains_key(collection_id, owner),1869            Error::<T>::TokenNotFound1870        );18711872        let mut balance = <FungibleItemList<T>>::get(collection_id, owner);1873        ensure!(balance.value >= value, Error::<T>::TokenValueTooLow);18741875        // Send balance to recipient (updates balanceOf of recipient)1876        Self::add_fungible_item(collection_id, recipient, value)?;18771878        // update balanceOf of sender1879        <Balance<T>>::insert(collection_id, (*owner).clone(), balance.value - value);18801881        // Reduce or remove sender1882        if balance.value == value {1883            <FungibleItemList<T>>::remove(collection_id, owner);1884        }1885        else {1886            balance.value -= value;1887            <FungibleItemList<T>>::insert(collection_id, (*owner).clone(), balance);1888        }18891890        Ok(())1891    }18921893    fn transfer_refungible(1894        collection_id: CollectionId,1895        item_id: TokenId,1896        value: u128,1897        owner: T::AccountId,1898        new_owner: T::AccountId,1899    ) -> DispatchResult {1900        ensure!(1901            <ReFungibleItemList<T>>::contains_key(collection_id, item_id),1902            Error::<T>::TokenNotFound1903        );19041905        let full_item = <ReFungibleItemList<T>>::get(collection_id, item_id);1906        let item = full_item1907            .owner1908            .iter()1909            .filter(|i| i.owner == owner)1910            .next()1911            .ok_or(Error::<T>::NumOverflow)?;1912        let amount = item.fraction;19131914        ensure!(amount >= value, Error::<T>::TokenValueTooLow);19151916        // update balance1917        let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.clone())1918            .checked_sub(value)1919            .ok_or(Error::<T>::NumOverflow)?;1920        <Balance<T>>::insert(collection_id, item.owner.clone(), balance_old_owner);19211922        let balancenew_owner = <Balance<T>>::get(collection_id, new_owner.clone())1923            .checked_add(value)1924            .ok_or(Error::<T>::NumOverflow)?;1925        <Balance<T>>::insert(collection_id, new_owner.clone(), balancenew_owner);19261927        let old_owner = item.owner.clone();1928        let new_owner_has_account = full_item.owner.iter().any(|i| i.owner == new_owner);19291930        // transfer1931        if amount == value && !new_owner_has_account {1932            // change owner1933            // new owner do not have account1934            let mut new_full_item = full_item.clone();1935            new_full_item1936                .owner1937                .iter_mut()1938                .find(|i| i.owner == owner)1939                .unwrap()1940                .owner = new_owner.clone();1941            <ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);19421943            // update index collection1944            Self::move_token_index(collection_id, item_id, old_owner.clone(), new_owner.clone())?;1945        } else {1946            let mut new_full_item = full_item.clone();1947            new_full_item1948                .owner1949                .iter_mut()1950                .find(|i| i.owner == owner)1951                .unwrap()1952                .fraction -= value;19531954            // separate amount1955            if new_owner_has_account {1956                // new owner has account1957                new_full_item1958                    .owner1959                    .iter_mut()1960                    .find(|i| i.owner == new_owner)1961                    .unwrap()1962                    .fraction += value;1963            } else {1964                // new owner do not have account1965                new_full_item.owner.push(Ownership {1966                    owner: new_owner.clone(),1967                    fraction: value,1968                });1969                Self::add_token_index(collection_id, item_id, new_owner.clone())?;1970            }19711972            <ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);1973        }19741975        Ok(())1976    }19771978    fn transfer_nft(1979        collection_id: CollectionId,1980        item_id: TokenId,1981        sender: T::AccountId,1982        new_owner: T::AccountId,1983    ) -> DispatchResult {1984        ensure!(1985            <NftItemList<T>>::contains_key(collection_id, item_id),1986            Error::<T>::TokenNotFound1987        );19881989        let mut item = <NftItemList<T>>::get(collection_id, item_id);19901991        ensure!(1992            sender == item.owner,1993            Error::<T>::MustBeTokenOwner1994        );19951996        // update balance1997        let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.clone())1998            .checked_sub(1)1999            .ok_or(Error::<T>::NumOverflow)?;2000        <Balance<T>>::insert(collection_id, item.owner.clone(), balance_old_owner);20012002        let balancenew_owner = <Balance<T>>::get(collection_id, new_owner.clone())2003            .checked_add(1)2004            .ok_or(Error::<T>::NumOverflow)?;2005        <Balance<T>>::insert(collection_id, new_owner.clone(), balancenew_owner);20062007        // change owner2008        let old_owner = item.owner.clone();2009        item.owner = new_owner.clone();2010        <NftItemList<T>>::insert(collection_id, item_id, item);20112012        // update index collection2013        Self::move_token_index(collection_id, item_id, old_owner.clone(), new_owner.clone())?;20142015        Ok(())2016    }2017    2018    fn item_exists(2019        collection_id: CollectionId,2020        item_id: TokenId,2021        mode: &CollectionMode2022    ) -> DispatchResult {2023        match mode {2024            CollectionMode::NFT => ensure!(<NftItemList<T>>::contains_key(collection_id, item_id), Error::<T>::TokenNotFound),2025            CollectionMode::ReFungible(_) => ensure!(<ReFungibleItemList<T>>::contains_key(collection_id, item_id), Error::<T>::TokenNotFound),2026            _ => ()2027        };2028        2029        Ok(())2030    }20312032    fn set_re_fungible_variable_data(2033        collection_id: CollectionId,2034        item_id: TokenId,2035        data: Vec<u8>2036    ) -> DispatchResult {2037        let mut item = <ReFungibleItemList<T>>::get(collection_id, item_id);20382039        item.variable_data = data;20402041        <ReFungibleItemList<T>>::insert(collection_id, item_id, item);20422043        Ok(())2044    }20452046    fn set_nft_variable_data(2047        collection_id: CollectionId,2048        item_id: TokenId,2049        data: Vec<u8>2050    ) -> DispatchResult {2051        let mut item = <NftItemList<T>>::get(collection_id, item_id);2052        2053        item.variable_data = data;20542055        <NftItemList<T>>::insert(collection_id, item_id, item);2056        2057        Ok(())2058    }20592060    fn init_collection(item: &CollectionType<T::AccountId>) {2061        // check params2062        assert!(2063            item.decimal_points <= MAX_DECIMAL_POINTS,2064            "decimal_points parameter must be lower than MAX_DECIMAL_POINTS"2065        );2066        assert!(2067            item.name.len() <= 64,2068            "Collection name can not be longer than 63 char"2069        );2070        assert!(2071            item.name.len() <= 256,2072            "Collection description can not be longer than 255 char"2073        );2074        assert!(2075            item.token_prefix.len() <= 16,2076            "Token prefix can not be longer than 15 char"2077        );20782079        // Generate next collection ID2080        let next_id = CreatedCollectionCount::get()2081            .checked_add(1)2082            .unwrap();20832084        CreatedCollectionCount::put(next_id);2085    }20862087    fn init_nft_token(collection_id: CollectionId, item: &NftItemType<T::AccountId>) {2088        let current_index = <ItemListIndex>::get(collection_id)2089            .checked_add(1)2090            .unwrap();20912092        let item_owner = item.owner.clone();2093        Self::add_token_index(collection_id, current_index, item.owner.clone()).unwrap();20942095        <ItemListIndex>::insert(collection_id, current_index);20962097        // Update balance2098        let new_balance = <Balance<T>>::get(collection_id, item_owner.clone())2099            .checked_add(1)2100            .unwrap();2101        <Balance<T>>::insert(collection_id, item_owner.clone(), new_balance);2102    }21032104    fn init_fungible_token(collection_id: CollectionId, owner: &T::AccountId, item: &FungibleItemType) {2105        let current_index = <ItemListIndex>::get(collection_id)2106            .checked_add(1)2107            .unwrap();21082109        Self::add_token_index(collection_id, current_index, (*owner).clone()).unwrap();21102111        <ItemListIndex>::insert(collection_id, current_index);21122113        // Update balance2114        let new_balance = <Balance<T>>::get(collection_id, owner)2115            .checked_add(item.value)2116            .unwrap();2117        <Balance<T>>::insert(collection_id, (*owner).clone(), new_balance);2118    }21192120    fn init_refungible_token(collection_id: CollectionId, item: &ReFungibleItemType<T::AccountId>) {2121        let current_index = <ItemListIndex>::get(collection_id)2122            .checked_add(1)2123            .unwrap();21242125        let value = item.owner.first().unwrap().fraction;2126        let owner = item.owner.first().unwrap().owner.clone();21272128        Self::add_token_index(collection_id, current_index, owner.clone()).unwrap();21292130        <ItemListIndex>::insert(collection_id, current_index);21312132        // Update balance2133        let new_balance = <Balance<T>>::get(collection_id, owner.clone())2134            .checked_add(value)2135            .unwrap();2136        <Balance<T>>::insert(collection_id, owner.clone(), new_balance);2137    }21382139    fn add_token_index(collection_id: CollectionId, item_index: TokenId, owner: T::AccountId) -> DispatchResult {21402141        // add to account limit2142        if <AccountItemCount<T>>::contains_key(owner.clone()) {21432144            // bound Owned tokens by a single address2145            let count = <AccountItemCount<T>>::get(owner.clone());2146            ensure!(count < ChainLimit::get().account_token_ownership_limit, Error::<T>::AddressOwnershipLimitExceeded);21472148            <AccountItemCount<T>>::insert(owner.clone(), count2149                .checked_add(1)2150                .ok_or(Error::<T>::NumOverflow)?);2151        }2152        else {2153            <AccountItemCount<T>>::insert(owner.clone(), 1);2154        }21552156        let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner.clone());2157        if list_exists {2158            let mut list = <AddressTokens<T>>::get(collection_id, owner.clone());2159            let item_contains = list.contains(&item_index.clone());21602161            if !item_contains {2162                list.push(item_index.clone());2163            }21642165            <AddressTokens<T>>::insert(collection_id, owner.clone(), list);2166        } else {2167            let mut itm = Vec::new();2168            itm.push(item_index.clone());2169            <AddressTokens<T>>::insert(collection_id, owner, itm);2170            2171        }21722173        Ok(())2174    }21752176    fn remove_token_index(2177        collection_id: CollectionId,2178        item_index: TokenId,2179        owner: T::AccountId,2180    ) -> DispatchResult {21812182        // update counter2183        <AccountItemCount<T>>::insert(owner.clone(), 2184            <AccountItemCount<T>>::get(owner.clone())2185            .checked_sub(1)2186            .ok_or(Error::<T>::NumOverflow)?);218721882189        let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner.clone());2190        if list_exists {2191            let mut list = <AddressTokens<T>>::get(collection_id, owner.clone());2192            let item_contains = list.contains(&item_index.clone());21932194            if item_contains {2195                list.retain(|&item| item != item_index);2196                <AddressTokens<T>>::insert(collection_id, owner, list);2197            }2198        }21992200        Ok(())2201    }22022203    fn move_token_index(2204        collection_id: CollectionId,2205        item_index: TokenId,2206        old_owner: T::AccountId,2207        new_owner: T::AccountId,2208    ) -> DispatchResult {2209        Self::remove_token_index(collection_id, item_index, old_owner)?;2210        Self::add_token_index(collection_id, item_index, new_owner)?;22112212        Ok(())2213    }2214    2215    fn ensure_contract_owned(account: T::AccountId, contract: &T::AccountId) -> DispatchResult {2216        if <ContractOwner<T>>::contains_key(contract.clone()) {2217            let owner = <ContractOwner<T>>::get(contract);2218            ensure!(account == owner, Error::<T>::NoPermission);2219        } else {2220            fail!(Error::<T>::NoPermission);2221        }22222223        Ok(())2224    }2225}22262227////////////////////////////////////////////////////////////////////////////////////////////////////2228// Economic models2229// #region22302231/// Fee multiplier.2232pub type Multiplier = FixedU128;22332234type BalanceOf<T> = <<T as transaction_payment::Trait>::Currency as Currency<2235    <T as system::Trait>::AccountId,2236>>::Balance;2237type NegativeImbalanceOf<T> = <<T as transaction_payment::Trait>::Currency as Currency<2238    <T as system::Trait>::AccountId,2239>>::NegativeImbalance;22402241/// Require the transactor pay for themselves and maybe include a tip to gain additional priority2242/// in the queue.2243#[derive(Encode, Decode, Clone, Eq, PartialEq)]2244pub struct ChargeTransactionPayment<T: Trait + Send + Sync>(2245    #[codec(compact)] BalanceOf<T>2246);22472248impl<T: Trait + Send + Sync> sp_std::fmt::Debug2249    for ChargeTransactionPayment<T>2250{2251    #[cfg(feature = "std")]2252    fn fmt(&self, f: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {2253        write!(f, "ChargeTransactionPayment<{:?}>", self.0)2254    }2255    #[cfg(not(feature = "std"))]2256    fn fmt(&self, _: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {2257        Ok(())2258    }2259}22602261impl<T: Trait + Send + Sync> ChargeTransactionPayment<T>2262where2263    T::Call: Dispatchable<Info = DispatchInfo, PostInfo = PostDispatchInfo> + IsSubType<Call<T>> + IsSubType<pallet_contracts::Call<T>>,2264    BalanceOf<T>: Send + Sync + FixedPointOperand,2265{2266    /// utility constructor. Used only in client/factory code.2267    pub fn from(fee: BalanceOf<T>) -> Self {2268        Self(fee)2269    }22702271    pub fn traditional_fee(2272        len: usize,2273        info: &DispatchInfoOf<T::Call>,2274        tip: BalanceOf<T>,2275    ) -> BalanceOf<T>2276    where2277        T::Call: Dispatchable<Info = DispatchInfo>,2278    {2279        <transaction_payment::Module<T>>::compute_fee(len as u32, info, tip)2280    }22812282	fn get_priority(len: usize, info: &DispatchInfoOf<T::Call>, final_fee: BalanceOf<T>) -> TransactionPriority {2283		let weight_saturation = T::MaximumBlockWeight::get() / info.weight.max(1);2284		let len_saturation = T::MaximumBlockLength::get() as u64 / (len as u64).max(1);2285		let coefficient: BalanceOf<T> = weight_saturation.min(len_saturation).saturated_into::<BalanceOf<T>>();2286		final_fee.saturating_mul(coefficient).saturated_into::<TransactionPriority>()2287	}22882289    fn withdraw_fee(2290        &self,2291        who: &T::AccountId,2292        call: &T::Call,2293        info: &DispatchInfoOf<T::Call>,2294        len: usize,2295    ) -> Result<(BalanceOf<T>, Option<NegativeImbalanceOf<T>>), TransactionValidityError> {2296        let tip = self.0;22972298        // Set fee based on call type. Creating collection costs 1 Unique.2299        // All other transactions have traditional fees so far2300        // let fee = match call.is_sub_type() {2301        //     Some(Call::create_collection(..)) => <BalanceOf<T>>::from(1_000_000_000),2302        //     _ => Self::traditional_fee(len, info, tip), // Flat fee model, use only for testing purposes2303        //                                                 // _ => <BalanceOf<T>>::from(100)2304        // };2305        let fee = Self::traditional_fee(len, info, tip);23062307        // Only mess with balances if fee is not zero.2308        if fee.is_zero() {2309            return Ok((fee, None));2310        }23112312        // Determine who is paying transaction fee based on ecnomic model2313        // Parse call to extract collection ID and access collection sponsor2314        let mut sponsor: T::AccountId = match IsSubType::<Call<T>>::is_sub_type(call) {2315            Some(Call::create_item(collection_id, _owner, _properties)) => {23162317                // sponsor timeout2318                let block_number = <system::Module<T>>::block_number() as T::BlockNumber;23192320                let limit = <Collection<T>>::get(collection_id).limits.sponsor_transfer_timeout;2321                let mut sponsored = true;2322                if <CreateItemBasket<T>>::contains_key((collection_id, &who)) {2323                    let last_tx_block = <CreateItemBasket<T>>::get((collection_id, &who));2324                    let limit_time = last_tx_block + limit.into();2325                    if block_number <= limit_time {2326                        sponsored = false;2327                    }2328                }2329                if sponsored {2330                    <CreateItemBasket<T>>::insert((collection_id, who.clone()), block_number);2331                }23322333                // check free create limit2334                if (<Collection<T>>::get(collection_id).limits.sponsored_data_size >= (_properties.len() as u32)) &&2335                   (<Collection<T>>::get(collection_id).sponsor_confirmed) &&2336                   (sponsored)2337                {2338                    <Collection<T>>::get(collection_id).sponsor2339                } else {2340                    T::AccountId::default()2341                }2342            }2343            Some(Call::transfer(_new_owner, collection_id, item_id, _value)) => {2344                2345                let mut sponsor_transfer = false;2346                if <Collection<T>>::get(collection_id).sponsor_confirmed {23472348                    let collection_limits = <Collection<T>>::get(collection_id).limits;2349                    let collection_mode = <Collection<T>>::get(collection_id).mode;2350    2351                    // sponsor timeout2352                    let block_number = <system::Module<T>>::block_number() as T::BlockNumber;2353                    sponsor_transfer = match collection_mode {2354                        CollectionMode::NFT => {2355    2356                            // get correct limit2357                            let limit: u32 = if collection_limits.sponsor_transfer_timeout > 0 {2358                                collection_limits.sponsor_transfer_timeout2359                            } else {2360                                ChainLimit::get().nft_sponsor_transfer_timeout2361                            };2362    2363                            let mut sponsored = true;2364                            if <NftTransferBasket<T>>::contains_key(collection_id, item_id) {2365                                let last_tx_block = <NftTransferBasket<T>>::get(collection_id, item_id);2366                                let limit_time = last_tx_block + limit.into();2367                                if block_number <= limit_time {2368                                    sponsored = false;2369                                }2370                            }2371                            if sponsored {2372                                <NftTransferBasket<T>>::insert(collection_id, item_id, block_number);2373                            }23742375                            sponsored2376                        }2377                        CollectionMode::Fungible(_) => {2378    2379                            // get correct limit2380                            let limit: u32 = if collection_limits.sponsor_transfer_timeout > 0 {2381                                collection_limits.sponsor_transfer_timeout2382                            } else {2383                                ChainLimit::get().fungible_sponsor_transfer_timeout2384                            };2385    2386                            let block_number = <system::Module<T>>::block_number() as T::BlockNumber;2387                            let mut sponsored = true;2388                            if <FungibleTransferBasket<T>>::contains_key(collection_id, who) {2389                                let last_tx_block = <FungibleTransferBasket<T>>::get(collection_id, who);2390                                let limit_time = last_tx_block + limit.into();2391                                if block_number <= limit_time {2392                                    sponsored = false;2393                                }2394                            }2395                            if sponsored {2396                                <FungibleTransferBasket<T>>::insert(collection_id, who, block_number);2397                            }23982399                            sponsored2400                        }2401                        CollectionMode::ReFungible(_) => {2402    2403                            // get correct limit2404                            let limit: u32 = if collection_limits.sponsor_transfer_timeout > 0 {2405                                collection_limits.sponsor_transfer_timeout2406                            } else {2407                                ChainLimit::get().refungible_sponsor_transfer_timeout2408                            };2409    2410                            let mut sponsored = true;2411                            if <ReFungibleTransferBasket<T>>::contains_key(collection_id, item_id) {2412                                let last_tx_block = <ReFungibleTransferBasket<T>>::get(collection_id, item_id);2413                                let limit_time = last_tx_block + limit.into();2414                                if block_number <= limit_time {2415                                    sponsored = false;2416                                }2417                            }2418                            if sponsored {2419                                <ReFungibleTransferBasket<T>>::insert(collection_id, item_id, block_number);2420                            }24212422                            sponsored2423                        }2424                        _ => {2425                            false2426                        },2427                    };2428                }24292430                if !sponsor_transfer {2431                    T::AccountId::default()2432                } else {2433                    <Collection<T>>::get(collection_id).sponsor2434                }2435            }24362437            _ => T::AccountId::default(),2438        };24392440        // Sponsor smart contracts2441        sponsor = match IsSubType::<pallet_contracts::Call<T>>::is_sub_type(call) {24422443            // On instantiation: set the contract owner2444            Some(pallet_contracts::Call::instantiate(_endowment, _gas_limit, code_hash, data)) => {24452446                let new_contract_address = <T as pallet_contracts::Trait>::DetermineContractAddress::contract_address_for(2447                    code_hash,2448                    &data,2449                    &who,2450                );2451                <ContractOwner<T>>::insert(new_contract_address.clone(), who.clone());24522453                T::AccountId::default()2454            },24552456            // When the contract is called, check if the sponsoring is enabled and pay fees from contract endowment if it is2457            Some(pallet_contracts::Call::call(dest, _value, _gas_limit, _data)) => {24582459                let called_contract: T::AccountId = T::Lookup::lookup((*dest).clone()).unwrap_or(T::AccountId::default());24602461                let owned_contract = <ContractOwner<T>>::contains_key(called_contract.clone())2462                  && <ContractOwner<T>>::get(called_contract.clone()) == *who;2463                let white_list_enabled = <ContractWhiteListEnabled<T>>::contains_key(called_contract.clone()) && <ContractWhiteListEnabled<T>>::get(called_contract.clone());2464                  2465                if !owned_contract && white_list_enabled {2466                    if !<ContractWhiteList<T>>::contains_key(called_contract.clone(), who) {2467                        return Err(InvalidTransaction::Call.into());2468                    }2469                }24702471                let mut sponsor_transfer = false;2472                if <ContractSponsoringRateLimit<T>>::contains_key(called_contract.clone()) {2473                    let last_tx_block = <ContractSponsorBasket<T>>::get((&called_contract, &who));2474                    let block_number = <system::Module<T>>::block_number() as T::BlockNumber;2475                    let rate_limit = <ContractSponsoringRateLimit<T>>::get(&called_contract);2476                    let limit_time = last_tx_block + rate_limit;24772478                    if block_number >= limit_time {2479                        <ContractSponsorBasket<T>>::insert((called_contract.clone(), who.clone()), block_number);2480                        sponsor_transfer = true;2481                    }2482                } else {2483                    sponsor_transfer = false;2484                }2485               2486                2487                let mut sp = T::AccountId::default();2488                if sponsor_transfer {2489                    if <ContractSelfSponsoring<T>>::contains_key(called_contract.clone()) {2490                        if <ContractSelfSponsoring<T>>::get(called_contract.clone()) {2491                            sp = called_contract;2492                        }2493                    }2494                }24952496                sp2497            },24982499            _ => sponsor,2500        };25012502        let mut who_pays_fee: T::AccountId = sponsor.clone();2503        if sponsor == T::AccountId::default() {2504            who_pays_fee = who.clone();2505        }25062507        match <T as transaction_payment::Trait>::Currency::withdraw(2508            &who_pays_fee,2509            fee,2510            if tip.is_zero() {2511                WithdrawReason::TransactionPayment.into()2512            } else {2513                WithdrawReason::TransactionPayment | WithdrawReason::Tip2514            },2515            ExistenceRequirement::KeepAlive,2516        ) {2517            Ok(imbalance) => Ok((fee, Some(imbalance))),2518            Err(_) => Err(InvalidTransaction::Payment.into()),2519        }2520    }2521}252225232524impl<T: Trait + Send + Sync> SignedExtension2525    for ChargeTransactionPayment<T>2526where2527    BalanceOf<T>: Send + Sync + From<u64> + FixedPointOperand,2528    T::Call: Dispatchable<Info = DispatchInfo, PostInfo = PostDispatchInfo> + IsSubType<Call<T>> + IsSubType<pallet_contracts::Call<T>>,2529{2530    const IDENTIFIER: &'static str = "ChargeTransactionPayment";2531    type AccountId = T::AccountId;2532    type Call = T::Call;2533    type AdditionalSigned = ();2534    type Pre = (2535        BalanceOf<T>,2536        Self::AccountId,2537        Option<NegativeImbalanceOf<T>>,2538        BalanceOf<T>,2539    );2540    fn additional_signed(&self) -> sp_std::result::Result<(), TransactionValidityError> {2541        Ok(())2542    }25432544    fn validate(2545        &self,2546        who: &Self::AccountId,2547        call: &Self::Call,2548        info: &DispatchInfoOf<Self::Call>,2549        len: usize,2550    ) -> TransactionValidity {2551		let (fee, _) = self.withdraw_fee(who, call, info, len)?;2552		Ok(ValidTransaction {2553			priority: Self::get_priority(len, info, fee),2554			..Default::default()2555		})2556    }25572558    fn pre_dispatch(2559        self,2560        who: &Self::AccountId,2561        call: &Self::Call,2562        info: &DispatchInfoOf<Self::Call>,2563        len: usize,2564    ) -> Result<Self::Pre, TransactionValidityError> {2565        let (fee, imbalance) = self.withdraw_fee(who, call, info, len)?;2566        Ok((self.0, who.clone(), imbalance, fee))2567    }25682569    fn post_dispatch(2570        pre: Self::Pre,2571        info: &DispatchInfoOf<Self::Call>,2572        post_info: &PostDispatchInfoOf<Self::Call>,2573        len: usize,2574        _result: &DispatchResult,2575    ) -> Result<(), TransactionValidityError> {2576        let (tip, who, imbalance, fee) = pre;2577        if let Some(payed) = imbalance {2578            let actual_fee = <transaction_payment::Module<T>>::compute_actual_fee(2579                len as u32, info, post_info, tip,2580            );2581            let refund = fee.saturating_sub(actual_fee);2582            let actual_payment =2583                match <T as transaction_payment::Trait>::Currency::deposit_into_existing(2584                    &who, refund,2585                ) {2586                    Ok(refund_imbalance) => {2587                        // The refund cannot be larger than the up front payed max weight.2588                        // `PostDispatchInfo::calc_unspent` guards against such a case.2589                        match payed.offset(refund_imbalance) {2590                            Ok(actual_payment) => actual_payment,2591                            Err(_) => return Err(InvalidTransaction::Payment.into()),2592                        }2593                    }2594                    // We do not recreate the account using the refund. The up front payment2595                    // is gone in that case.2596                    Err(_) => payed,2597                };2598            let imbalances = actual_payment.split(tip);2599            <T as transaction_payment::Trait>::OnTransactionPayment::on_unbalanceds(2600                Some(imbalances.0).into_iter().chain(Some(imbalances.1)),2601            );2602        }2603        Ok(())2604    }2605}26062607// #endregion