git.delta.rocks / unique-network / refs/commits / 6994ced8a635

1#![cfg_attr(not(feature = "std"), no_std)]23#[cfg(feature = "std")]4pub use std::*;56#[cfg(feature = "std")]7pub use serde::*;89use codec::{Decode, Encode};10pub use frame_support::{11    construct_runtime, decl_event, decl_module, decl_storage, decl_error,12    dispatch::DispatchResult,13    ensure, fail, parameter_types,14    traits::{15        Currency, ExistenceRequirement, Get, Imbalance, KeyOwnerProofSystem, OnUnbalanced,16        Randomness, WithdrawReason,17    },18    weights::{19        constants::{BlockExecutionWeight, ExtrinsicBaseWeight, RocksDbWeight, WEIGHT_PER_SECOND},20        DispatchInfo, GetDispatchInfo, IdentityFee, Pays, PostDispatchInfo, Weight,21        WeightToFeePolynomial,22    },23    IsSubType, StorageValue,24};2526use frame_system::{self as system, ensure_signed, ensure_root};27use sp_runtime::sp_std::prelude::Vec;28use sp_runtime::{29    traits::{30        DispatchInfoOf, Dispatchable, PostDispatchInfoOf, Saturating, SignedExtension, Zero,31    },32    transaction_validity::{33        InvalidTransaction, TransactionValidity, TransactionValidityError, ValidTransaction,34    },35    FixedPointOperand, FixedU128,36};37use pallet_contracts::ContractAddressFor;38use sp_runtime::traits::StaticLookup;3940#[cfg(test)]41mod mock;4243#[cfg(test)]44mod tests;4546mod default_weights;4748pub const MAX_DECIMAL_POINTS: DecimalPoints = 30;49pub const MAX_SPONSOR_TIMEOUT: u32 = 10_368_000;50pub const MAX_TOKEN_OWNERSHIP: u32 = 10_000_000;5152// Structs53// #region5455pub type CollectionId = u32;56pub type TokenId = u32;5758pub type DecimalPoints = u8;5960#[derive(Encode, Decode, Eq, Debug, Clone, PartialEq)]61#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]62pub enum CollectionMode {63    Invalid,64    NFT,65    // decimal points66    Fungible(DecimalPoints),67    // decimal points68    ReFungible(DecimalPoints),69}7071impl Into<u8> for CollectionMode {72    fn into(self) -> u8 {73        match self {74            CollectionMode::Invalid => 0,75            CollectionMode::NFT => 1,76            CollectionMode::Fungible(_) => 2,77            CollectionMode::ReFungible(_) => 3,78        }79    }80}8182#[derive(Encode, Decode, Eq, Debug, Clone, PartialEq)]83#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]84pub enum AccessMode {85    Normal,86    WhiteList,87}88impl Default for AccessMode {89    fn default() -> Self {90        Self::Normal91    }92}9394impl Default for CollectionMode {95    fn default() -> Self {96        Self::Invalid97    }98}99100#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]101#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]102pub struct Ownership<AccountId> {103    pub owner: AccountId,104    pub fraction: u128,105}106107#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]108#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]109pub struct CollectionType<AccountId> {110    pub owner: AccountId,111    pub mode: CollectionMode,112    pub access: AccessMode,113    pub decimal_points: DecimalPoints,114    pub name: Vec<u16>,        // 64 include null escape char115    pub description: Vec<u16>, // 256 include null escape char116    pub token_prefix: Vec<u8>, // 16 include null escape char117    pub mint_mode: bool,118    pub offchain_schema: Vec<u8>,119    pub sponsor: AccountId, // Who pays fees. If set to default address, the fees are applied to the transaction sender120    pub unconfirmed_sponsor: AccountId, // Sponsor address that has not yet confirmed sponsorship121    pub limits: CollectionLimits, // Collection private restrictions 122    pub variable_on_chain_schema: Vec<u8>, //123    pub const_on_chain_schema: Vec<u8>, //124}125126#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]127#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]128pub struct NftItemType<AccountId> {129    pub collection: CollectionId,130    pub owner: AccountId,131    pub const_data: Vec<u8>,132    pub variable_data: Vec<u8>,133}134135#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]136#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]137pub struct FungibleItemType<AccountId> {138    pub collection: CollectionId,139    pub owner: AccountId,140    pub value: u128,141}142143#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]144#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]145pub struct ReFungibleItemType<AccountId> {146    pub collection: CollectionId,147    pub owner: Vec<Ownership<AccountId>>,148    pub const_data: Vec<u8>,149    pub variable_data: Vec<u8>,150}151152#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]153#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]154pub struct ApprovePermissions<AccountId> {155    pub approved: AccountId,156    pub amount: u128,157}158159#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]160#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]161pub struct VestingItem<AccountId, Moment> {162    pub sender: AccountId,163    pub recipient: AccountId,164    pub collection_id: CollectionId,165    pub item_id: TokenId,166    pub amount: u64,167    pub vesting_date: Moment,168}169170#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]171#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]172pub struct BasketItem<AccountId, BlockNumber> {173    pub address: AccountId,174    pub start_block: BlockNumber,175}176177#[derive(Encode, Decode, Debug, Clone, PartialEq)]178#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]179pub struct CollectionLimits {180    pub account_token_ownership_limit: u32,181    pub sponsored_data_size: u32,182    pub token_limit: u32,183184    // Timeouts for item types in passed blocks185    pub sponsor_transfer_timeout: u32,186}187188impl Default for CollectionLimits {189    fn default() -> CollectionLimits {190        CollectionLimits { 191            account_token_ownership_limit: 10_000_000, 192            token_limit: u32::max_value(),193            sponsored_data_size: u32::max_value(), 194            sponsor_transfer_timeout: 14400 }195    }196}197198#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]199#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]200pub struct ChainLimits {201    pub collection_numbers_limit: u32,202    pub account_token_ownership_limit: u32,203    pub collections_admins_limit: u64,204    pub custom_data_limit: u32,205206    // Timeouts for item types in passed blocks207    pub nft_sponsor_transfer_timeout: u32,208    pub fungible_sponsor_transfer_timeout: u32,209    pub refungible_sponsor_transfer_timeout: u32,210}211212pub trait WeightInfo {213	fn create_collection() -> Weight;214	fn destroy_collection() -> Weight;215	fn add_to_white_list() -> Weight;216	fn remove_from_white_list() -> Weight;217    fn set_public_access_mode() -> Weight;218    fn set_mint_permission() -> Weight;219    fn change_collection_owner() -> Weight;220    fn add_collection_admin() -> Weight;221    fn remove_collection_admin() -> Weight;222    fn set_collection_sponsor() -> Weight;223    fn confirm_sponsorship() -> Weight;224    fn remove_collection_sponsor() -> Weight;225    fn create_item(s: usize) -> Weight;226    fn burn_item() -> Weight;227    fn transfer() -> Weight;228    fn approve() -> Weight;229    fn transfer_from() -> Weight;230    fn set_offchain_schema() -> Weight;231    fn set_const_on_chain_schema() -> Weight;232    fn set_variable_on_chain_schema() -> Weight;233    fn set_variable_meta_data() -> Weight;234    fn enable_contract_sponsoring() -> Weight;235}236237#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]238#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]239pub struct CreateNftData {240    pub const_data: Vec<u8>,241    pub variable_data: Vec<u8>,242}243244#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]245#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]246pub struct CreateFungibleData {247}248249#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]250#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]251pub struct CreateReFungibleData {252    pub const_data: Vec<u8>,253    pub variable_data: Vec<u8>,254}255256#[derive(Encode, Decode, Debug, Clone, PartialEq)]257#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]258pub enum CreateItemData {259    NFT(CreateNftData),260    Fungible(CreateFungibleData),261    ReFungible(CreateReFungibleData)262}263264impl CreateItemData {265    pub fn len(&self) -> usize {266        let len = match self {267            CreateItemData::NFT(data) => data.variable_data.len() + data.const_data.len(),268            CreateItemData::ReFungible(data) => data.variable_data.len() + data.const_data.len(),269            _ => 0270        };271        272        return len;273    }274}275276impl From<CreateNftData> for CreateItemData {277    fn from(item: CreateNftData) -> Self {278        CreateItemData::NFT(item)279    }280}281282impl From<CreateReFungibleData> for CreateItemData {283    fn from(item: CreateReFungibleData) -> Self {284        CreateItemData::ReFungible(item)285    }286}287288impl From<CreateFungibleData> for CreateItemData {289    fn from(item: CreateFungibleData) -> Self {290        CreateItemData::Fungible(item)291    }292}293294295decl_error! {296	/// Error for non-fungible-token module.297	pub enum Error for Module<T: Trait> {298        /// Total collections bound exceeded.299        TotalCollectionsLimitExceeded,300		/// Decimal_points parameter must be lower than MAX_DECIMAL_POINTS constant, currently it is 30.301        CollectionDecimalPointLimitExceeded, 302        /// Collection name can not be longer than 63 char.303        CollectionNameLimitExceeded, 304        /// Collection description can not be longer than 255 char.305        CollectionDescriptionLimitExceeded, 306        /// Token prefix can not be longer than 15 char.307        CollectionTokenPrefixLimitExceeded,308        /// This collection does not exist.309        CollectionNotFound,310        /// Item not exists.311        TokenNotFound,312        /// Arithmetic calculation overflow.313        NumOverflow,       314        /// Account already has admin role.315        AlreadyAdmin,  316        /// You do not own this collection.317        NoPermission,318        /// This address is not set as sponsor, use setCollectionSponsor first.319        ConfirmUnsetSponsorFail,320        /// Collection is not in mint mode.321        PublicMintingNotAllowed,322        /// Sender parameter and item owner must be equal.323        MustBeTokenOwner,324        /// Item balance not enough.325        TokenValueTooLow,326        /// Size of item is too large.327        NftSizeLimitExceeded,328        /// No approve found329        ApproveNotFound,330        /// Requested value more than approved.331        TokenValueNotEnough,332        /// Only approved addresses can call this method.333        ApproveRequired,334        /// Address is not in white list.335        AddresNotInWhiteList,336        /// Number of collection admins bound exceeded.337        CollectionAdminsLimitExceeded,338        /// Owned tokens by a single address bound exceeded.339        AddressOwnershipLimitExceeded,340        /// Length of items properties must be greater than 0.341        EmptyArgument,342        /// const_data exceeded data limit.343        TokenConstDataLimitExceeded,344        /// variable_data exceeded data limit.345        TokenVariableDataLimitExceeded,346        /// Not NFT item data used to mint in NFT collection.347        NotNftDataUsedToMintNftCollectionToken,348        /// Not Fungible item data used to mint in Fungible collection.349        NotFungibleDataUsedToMintFungibleCollectionToken,350        /// Not Re Fungible item data used to mint in Re Fungible collection.351        NotReFungibleDataUsedToMintReFungibleCollectionToken,352        /// Unexpected collection type.353        UnexpectedCollectionType,354        /// Can't store metadata in fungible tokens.355        CantStoreMetadataInFungibleTokens,356        /// Collection token limit exceeded357        CollectionTokenLimitExceeded,358        /// Account token limit exceeded per collection359        AccountTokenLimitExceeded,360        /// Collection limit bounds per collection exceeded361        CollectionLimitBoundsExceeded362	}363}364365pub trait Trait: system::Trait + Sized + transaction_payment::Trait + pallet_contracts::Trait {366    type Event: From<Event<Self>> + Into<<Self as system::Trait>::Event>;367368    /// Weight information for extrinsics in this pallet.369	type WeightInfo: WeightInfo;370}371372#[cfg(feature = "runtime-benchmarks")]373mod benchmarking;374375// #endregion376377decl_storage! {378    trait Store for Module<T: Trait> as Nft {379380        // Private members381        NextCollectionID: CollectionId;382        CreatedCollectionCount: u32;383        ChainVersion: u64;384        ItemListIndex: map hasher(identity) CollectionId => TokenId;385386        // Chain limits struct387        pub ChainLimit get(fn chain_limit) config(): ChainLimits;388389        // Bound counters390        CollectionCount: u32;391        pub AccountItemCount get(fn account_item_count): map hasher(twox_64_concat) T::AccountId => u32;392393        // Basic collections394        pub Collection get(fn collection) config(): map hasher(identity) CollectionId => CollectionType<T::AccountId>;395        pub AdminList get(fn admin_list_collection): map hasher(identity) CollectionId => Vec<T::AccountId>;396        pub WhiteList get(fn white_list): map hasher(identity) CollectionId => Vec<T::AccountId>;397398        /// Balance owner per collection map399        pub Balance get(fn balance_count): double_map hasher(identity) CollectionId, hasher(twox_64_concat) T::AccountId => u128;400401        /// second parameter: item id + owner account id402        pub ApprovedList get(fn approved): double_map hasher(identity) CollectionId, hasher(twox_64_concat) (TokenId, T::AccountId) => Vec<ApprovePermissions<T::AccountId>>;403404        /// Item collections405        pub NftItemList get(fn nft_item_id) config(): double_map hasher(identity) CollectionId, hasher(identity) TokenId => NftItemType<T::AccountId>;406        pub FungibleItemList get(fn fungible_item_id) config(): double_map hasher(identity) CollectionId, hasher(identity) TokenId => FungibleItemType<T::AccountId>;407        pub ReFungibleItemList get(fn refungible_item_id) config(): double_map hasher(identity) CollectionId, hasher(identity) TokenId => ReFungibleItemType<T::AccountId>;408409        /// Index list410        pub AddressTokens get(fn address_tokens): double_map hasher(identity) CollectionId, hasher(twox_64_concat) T::AccountId => Vec<TokenId>;411412        /// Tokens transfer baskets413        pub NftTransferBasket get(fn nft_transfer_basket): double_map hasher(identity) CollectionId, hasher(identity) TokenId => T::BlockNumber;414        pub FungibleTransferBasket get(fn fungible_transfer_basket): double_map hasher(identity) CollectionId, hasher(identity) TokenId => Vec<BasketItem<T::AccountId, T::BlockNumber>>;415        pub ReFungibleTransferBasket get(fn refungible_transfer_basket): double_map hasher(identity) CollectionId, hasher(identity) TokenId => T::BlockNumber;416417        // Contract Sponsorship and Ownership418        pub ContractOwner get(fn contract_owner): map hasher(twox_64_concat) T::AccountId => T::AccountId;419        pub ContractSelfSponsoring get(fn contract_self_sponsoring): map hasher(twox_64_concat) T::AccountId => bool;420        pub ContractSponsorBasket get(fn contract_sponsor_basket): map hasher(twox_64_concat) (T::AccountId, T::AccountId) => T::BlockNumber;421        pub ContractSponsoringRateLimit get(fn contract_sponsoring_rate_limit): map hasher(twox_64_concat) T::AccountId => T::BlockNumber;422    }423    add_extra_genesis {424        build(|config: &GenesisConfig<T>| {425            // Modification of storage426            for (_num, _c) in &config.collection {427                <Module<T>>::init_collection(_c);428            }429430            for (_num, _q, _i) in &config.nft_item_id {431                <Module<T>>::init_nft_token(_i);432            }433434            for (_num, _q, _i) in &config.fungible_item_id {435                <Module<T>>::init_fungible_token(_i);436            }437438            for (_num, _q, _i) in &config.refungible_item_id {439                <Module<T>>::init_refungible_token(_i);440            }441        })442    }443}444445decl_event!(446    pub enum Event<T>447    where448        AccountId = <T as system::Trait>::AccountId,449    {450        /// New collection was created451        /// 452        /// # Arguments453        /// 454        /// * collection_id: Globally unique identifier of newly created collection.455        /// 456        /// * mode: [CollectionMode] converted into u8.457        /// 458        /// * account_id: Collection owner.459        Created(CollectionId, u8, AccountId),460461        /// New item was created.462        /// 463        /// # Arguments464        /// 465        /// * collection_id: Id of the collection where item was created.466        /// 467        /// * item_id: Id of an item. Unique within the collection.468        ItemCreated(CollectionId, TokenId),469470        /// Collection item was burned.471        /// 472        /// # Arguments473        /// 474        /// collection_id.475        /// 476        /// item_id: Identifier of burned NFT.477        ItemDestroyed(CollectionId, TokenId),478    }479);480481decl_module! {482    pub struct Module<T: Trait> for enum Call where origin: T::Origin {483484        fn deposit_event() = default;485        type Error = Error<T>;486487        fn on_initialize(now: T::BlockNumber) -> Weight {488489            if ChainVersion::get() < 2490            {491                let value = NextCollectionID::get();492                CreatedCollectionCount::put(value);493                ChainVersion::put(2);494            }495496            0497        }498499        /// 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.500        /// 501        /// # Permissions502        /// 503        /// * Anyone.504        /// 505        /// # Arguments506        /// 507        /// * collection_name: UTF-16 string with collection name (limit 64 characters), will be stored as zero-terminated.508        /// 509        /// * collection_description: UTF-16 string with collection description (limit 256 characters), will be stored as zero-terminated.510        /// 511        /// * token_prefix: UTF-8 string with token prefix.512        /// 513        /// * mode: [CollectionMode] collection type and type dependent data.514        // returns collection ID515        #[weight = T::WeightInfo::create_collection()]516        pub fn create_collection(origin,517                                 collection_name: Vec<u16>,518                                 collection_description: Vec<u16>,519                                 token_prefix: Vec<u8>,520                                 mode: CollectionMode) -> DispatchResult {521522            // Anyone can create a collection523            let who = ensure_signed(origin)?;524525            let decimal_points = match mode {526                CollectionMode::Fungible(points) => points,527                CollectionMode::ReFungible(points) => points,528                _ => 0529            };530531            // bound Total number of collections532            ensure!(CollectionCount::get() < ChainLimit::get().collection_numbers_limit, Error::<T>::TotalCollectionsLimitExceeded);533534            // check params535            ensure!(decimal_points <= MAX_DECIMAL_POINTS, Error::<T>::CollectionDecimalPointLimitExceeded);536537            let mut name = collection_name.to_vec();538            name.push(0);539            ensure!(name.len() <= 64, Error::<T>::CollectionNameLimitExceeded);540541            let mut description = collection_description.to_vec();542            description.push(0);543            ensure!(name.len() <= 256, Error::<T>::CollectionDescriptionLimitExceeded);544545            let mut prefix = token_prefix.to_vec();546            prefix.push(0);547            ensure!(prefix.len() <= 16, Error::<T>::CollectionTokenPrefixLimitExceeded);548549            // Generate next collection ID550            let next_id = CreatedCollectionCount::get()551                .checked_add(1)552                .ok_or(Error::<T>::NumOverflow)?;553554            // bound counter555            let total = CollectionCount::get()556                .checked_add(1)557                .ok_or(Error::<T>::NumOverflow)?;558559            CreatedCollectionCount::put(next_id);560            CollectionCount::put(total);561562            // Create new collection563            let new_collection = CollectionType {564                owner: who.clone(),565                name: name,566                mode: mode.clone(),567                mint_mode: false,568                access: AccessMode::Normal,569                description: description,570                decimal_points: decimal_points,571                token_prefix: prefix,572                offchain_schema: Vec::new(),573                sponsor: T::AccountId::default(),574                unconfirmed_sponsor: T::AccountId::default(),575                variable_on_chain_schema: Vec::new(),576                const_on_chain_schema: Vec::new(),577                limits: CollectionLimits::default(),578            };579580            // Add new collection to map581            <Collection<T>>::insert(next_id, new_collection);582583            // call event584            Self::deposit_event(RawEvent::Created(next_id, mode.into(), who.clone()));585586            Ok(())587        }588589        /// **DANGEROUS**: Destroys collection and all NFTs within this collection. Users irrecoverably lose their assets and may lose real money.590        /// 591        /// # Permissions592        /// 593        /// * Collection Owner.594        /// 595        /// # Arguments596        /// 597        /// * collection_id: collection to destroy.598        #[weight = T::WeightInfo::destroy_collection()]599        pub fn destroy_collection(origin, collection_id: CollectionId) -> DispatchResult {600601            let sender = ensure_signed(origin)?;602            Self::check_owner_permissions(collection_id, sender)?;603604            <AddressTokens<T>>::remove_prefix(collection_id);605            <ApprovedList<T>>::remove_prefix(collection_id);606            <Balance<T>>::remove_prefix(collection_id);607            <ItemListIndex>::remove(collection_id);608            <AdminList<T>>::remove(collection_id);609            <Collection<T>>::remove(collection_id);610            <WhiteList<T>>::remove(collection_id);611612            <NftItemList<T>>::remove_prefix(collection_id);613            <FungibleItemList<T>>::remove_prefix(collection_id);614            <ReFungibleItemList<T>>::remove_prefix(collection_id);615616            <NftTransferBasket<T>>::remove_prefix(collection_id);617            <FungibleTransferBasket<T>>::remove_prefix(collection_id);618            <ReFungibleTransferBasket<T>>::remove_prefix(collection_id);619620            if CollectionCount::get() > 0621            {622                // bound couter623                let total = CollectionCount::get()624                    .checked_sub(1)625                    .ok_or(Error::<T>::NumOverflow)?;626627                CollectionCount::put(total);628            }629630            Ok(())631        }632633        /// Add an address to white list.634        /// 635        /// # Permissions636        /// 637        /// * Collection Owner638        /// * Collection Admin639        /// 640        /// # Arguments641        /// 642        /// * collection_id.643        /// 644        /// * address.645        #[weight = T::WeightInfo::add_to_white_list()]646        pub fn add_to_white_list(origin, collection_id: CollectionId, address: T::AccountId) -> DispatchResult{647648            let sender = ensure_signed(origin)?;649            Self::check_owner_or_admin_permissions(collection_id, sender)?;650651            let mut white_list_collection: Vec<T::AccountId>;652            if <WhiteList<T>>::contains_key(collection_id) {653                white_list_collection = <WhiteList<T>>::get(collection_id);654                if !white_list_collection.contains(&address.clone())655                {656                    white_list_collection.push(address.clone());657                }658            }659            else {660                white_list_collection = Vec::new();661                white_list_collection.push(address.clone());662            }663664            <WhiteList<T>>::insert(collection_id, white_list_collection);665            Ok(())666        }667668        /// Remove an address from white list.669        /// 670        /// # Permissions671        /// 672        /// * Collection Owner673        /// * Collection Admin674        /// 675        /// # Arguments676        /// 677        /// * collection_id.678        /// 679        /// * address.680        #[weight = T::WeightInfo::remove_from_white_list()]681        pub fn remove_from_white_list(origin, collection_id: CollectionId, address: T::AccountId) -> DispatchResult{682683            let sender = ensure_signed(origin)?;684            Self::check_owner_or_admin_permissions(collection_id, sender)?;685686            if <WhiteList<T>>::contains_key(collection_id) {687                let mut white_list_collection = <WhiteList<T>>::get(collection_id);688                if white_list_collection.contains(&address.clone())689                {690                    white_list_collection.retain(|i| *i != address.clone());691                    <WhiteList<T>>::insert(collection_id, white_list_collection);692                }693            }694695            Ok(())696        }697698        /// Toggle between normal and white list access for the methods with access for `Anyone`.699        /// 700        /// # Permissions701        /// 702        /// * Collection Owner.703        /// 704        /// # Arguments705        /// 706        /// * collection_id.707        /// 708        /// * mode: [AccessMode]709        #[weight = T::WeightInfo::set_public_access_mode()]710        pub fn set_public_access_mode(origin, collection_id: CollectionId, mode: AccessMode) -> DispatchResult711        {712            let sender = ensure_signed(origin)?;713714            Self::check_owner_permissions(collection_id, sender)?;715            let mut target_collection = <Collection<T>>::get(collection_id);716            target_collection.access = mode;717            <Collection<T>>::insert(collection_id, target_collection);718719            Ok(())720        }721722        /// Allows Anyone to create tokens if:723        /// * White List is enabled, and724        /// * Address is added to white list, and725        /// * This method was called with True parameter726        /// 727        /// # Permissions728        /// * Collection Owner729        ///730        /// # Arguments731        /// 732        /// * collection_id.733        /// 734        /// * mint_permission: Boolean parameter. If True, allows minting to Anyone with conditions above.735        #[weight = T::WeightInfo::set_mint_permission()]736        pub fn set_mint_permission(origin, collection_id: CollectionId, mint_permission: bool) -> DispatchResult737        {738            let sender = ensure_signed(origin)?;739740            Self::check_owner_permissions(collection_id, sender)?;741            let mut target_collection = <Collection<T>>::get(collection_id);742            target_collection.mint_mode = mint_permission;743            <Collection<T>>::insert(collection_id, target_collection);744745            Ok(())746        }747748        /// Change the owner of the collection.749        /// 750        /// # Permissions751        /// 752        /// * Collection Owner.753        /// 754        /// # Arguments755        /// 756        /// * collection_id.757        /// 758        /// * new_owner.759        #[weight = T::WeightInfo::change_collection_owner()]760        pub fn change_collection_owner(origin, collection_id: CollectionId, new_owner: T::AccountId) -> DispatchResult {761762            let sender = ensure_signed(origin)?;763            Self::check_owner_permissions(collection_id, sender)?;764            let mut target_collection = <Collection<T>>::get(collection_id);765            target_collection.owner = new_owner;766            <Collection<T>>::insert(collection_id, target_collection);767768            Ok(())769        }770771        /// Adds an admin of the Collection.772        /// 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. 773        /// 774        /// # Permissions775        /// 776        /// * Collection Owner.777        /// * Collection Admin.778        /// 779        /// # Arguments780        /// 781        /// * collection_id: ID of the Collection to add admin for.782        /// 783        /// * new_admin_id: Address of new admin to add.784        #[weight = T::WeightInfo::add_collection_admin()]785        pub fn add_collection_admin(origin, collection_id: CollectionId, new_admin_id: T::AccountId) -> DispatchResult {786787            let sender = ensure_signed(origin)?;788            Self::check_owner_or_admin_permissions(collection_id, sender)?;789            let mut admin_arr: Vec<T::AccountId> = Vec::new();790791            if <AdminList<T>>::contains_key(collection_id)792            {793                admin_arr = <AdminList<T>>::get(collection_id);794                ensure!(!admin_arr.contains(&new_admin_id), Error::<T>::AlreadyAdmin);795            }796797            // Number of collection admins798            ensure!((admin_arr.len() as u64) < ChainLimit::get().collections_admins_limit, Error::<T>::CollectionAdminsLimitExceeded);799800            admin_arr.push(new_admin_id);801            <AdminList<T>>::insert(collection_id, admin_arr);802803            Ok(())804        }805806        /// 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.807        ///808        /// # Permissions809        /// 810        /// * Collection Owner.811        /// * Collection Admin.812        /// 813        /// # Arguments814        /// 815        /// * collection_id: ID of the Collection to remove admin for.816        /// 817        /// * account_id: Address of admin to remove.818        #[weight = T::WeightInfo::remove_collection_admin()]819        pub fn remove_collection_admin(origin, collection_id: CollectionId, account_id: T::AccountId) -> DispatchResult {820821            let sender = ensure_signed(origin)?;822            Self::check_owner_or_admin_permissions(collection_id, sender)?;823824            if <AdminList<T>>::contains_key(collection_id)825            {826                let mut admin_arr = <AdminList<T>>::get(collection_id);827                admin_arr.retain(|i| *i != account_id);828                <AdminList<T>>::insert(collection_id, admin_arr);829            }830831            Ok(())832        }833834        /// # Permissions835        /// 836        /// * Collection Owner837        /// 838        /// # Arguments839        /// 840        /// * collection_id.841        /// 842        /// * new_sponsor.843        #[weight = T::WeightInfo::set_collection_sponsor()]844        pub fn set_collection_sponsor(origin, collection_id: CollectionId, new_sponsor: T::AccountId) -> DispatchResult {845846            let sender = ensure_signed(origin)?;847            ensure!(<Collection<T>>::contains_key(collection_id), Error::<T>::CollectionNotFound);848849            let mut target_collection = <Collection<T>>::get(collection_id);850            ensure!(sender == target_collection.owner, Error::<T>::NoPermission);851852            target_collection.unconfirmed_sponsor = new_sponsor;853            <Collection<T>>::insert(collection_id, target_collection);854855            Ok(())856        }857858        /// # Permissions859        /// 860        /// * Sponsor.861        /// 862        /// # Arguments863        /// 864        /// * collection_id.865        #[weight = T::WeightInfo::confirm_sponsorship()]866        pub fn confirm_sponsorship(origin, collection_id: CollectionId) -> DispatchResult {867868            let sender = ensure_signed(origin)?;869            ensure!(<Collection<T>>::contains_key(collection_id), Error::<T>::CollectionNotFound);870871            let mut target_collection = <Collection<T>>::get(collection_id);872            ensure!(sender == target_collection.unconfirmed_sponsor, Error::<T>::ConfirmUnsetSponsorFail);873874            target_collection.sponsor = target_collection.unconfirmed_sponsor;875            target_collection.unconfirmed_sponsor = T::AccountId::default();876            <Collection<T>>::insert(collection_id, target_collection);877878            Ok(())879        }880881        /// Switch back to pay-per-own-transaction model.882        ///883        /// # Permissions884        ///885        /// * Collection owner.886        /// 887        /// # Arguments888        /// 889        /// * collection_id.890        #[weight = T::WeightInfo::remove_collection_sponsor()]891        pub fn remove_collection_sponsor(origin, collection_id: CollectionId) -> DispatchResult {892893            let sender = ensure_signed(origin)?;894            ensure!(<Collection<T>>::contains_key(collection_id), Error::<T>::CollectionNotFound);895896            let mut target_collection = <Collection<T>>::get(collection_id);897            ensure!(sender == target_collection.owner, Error::<T>::NoPermission);898899            target_collection.sponsor = T::AccountId::default();900            <Collection<T>>::insert(collection_id, target_collection);901902            Ok(())903        }904905        /// This method creates a concrete instance of NFT Collection created with CreateCollection method.906        /// 907        /// # Permissions908        /// 909        /// * Collection Owner.910        /// * Collection Admin.911        /// * Anyone if912        ///     * White List is enabled, and913        ///     * Address is added to white list, and914        ///     * MintPermission is enabled (see SetMintPermission method)915        /// 916        /// # Arguments917        /// 918        /// * collection_id: ID of the collection.919        /// 920        /// * owner: Address, initial owner of the NFT.921        ///922        /// * data: Token data to store on chain.923        // #[weight =924        // (130_000_000 as Weight)925        // .saturating_add((2135 as Weight).saturating_mul((properties.len() as u64) as Weight))926        // .saturating_add(RocksDbWeight::get().reads(10 as Weight))927        // .saturating_add(RocksDbWeight::get().writes(8 as Weight))]928929        #[weight = T::WeightInfo::create_item(data.len())]930        pub fn create_item(origin, collection_id: CollectionId, owner: T::AccountId, data: CreateItemData) -> DispatchResult {931932            let sender = ensure_signed(origin)?;933934            Self::collection_exists(collection_id)?;935936            let target_collection = <Collection<T>>::get(collection_id);937938            Self::can_create_items_in_collection(collection_id, &target_collection, &sender, &owner)?;939            Self::validate_create_item_args(&target_collection, &data)?;940            Self::create_item_no_validation(collection_id, &target_collection, owner, data)?;941942            Ok(())943        }944945        /// This method creates multiple instances of NFT Collection created with CreateCollection method.946        /// 947        /// # Permissions948        /// 949        /// * Collection Owner.950        /// * Collection Admin.951        /// * Anyone if952        ///     * White List is enabled, and953        ///     * Address is added to white list, and954        ///     * MintPermission is enabled (see SetMintPermission method)955        /// 956        /// # Arguments957        /// 958        /// * collection_id: ID of the collection.959        /// 960        /// * itemsData: Array items properties. Each property is an array of bytes itself, see [create_item].961        /// 962        /// * owner: Address, initial owner of the NFT.963        #[weight = T::WeightInfo::create_item(items_data.into_iter()964                               .map(|data| { data.len() })965                               .sum())]966        pub fn create_multiple_items(origin, collection_id: CollectionId, owner: T::AccountId, items_data: Vec<CreateItemData>) -> DispatchResult {967968            ensure!(items_data.len() > 0, Error::<T>::EmptyArgument);969            let sender = ensure_signed(origin)?;970971            Self::collection_exists(collection_id)?;972            let target_collection = <Collection<T>>::get(collection_id);973974            Self::can_create_items_in_collection(collection_id, &target_collection, &sender, &owner)?;975976            for data in &items_data {977                Self::validate_create_item_args(&target_collection, data)?;978            }979            for data in &items_data {980                Self::create_item_no_validation(collection_id, &target_collection, owner.clone(), data.clone())?;981            }982983            Ok(())984        }985986        /// Destroys a concrete instance of NFT.987        /// 988        /// # Permissions989        /// 990        /// * Collection Owner.991        /// * Collection Admin.992        /// * Current NFT Owner.993        /// 994        /// # Arguments995        /// 996        /// * collection_id: ID of the collection.997        /// 998        /// * item_id: ID of NFT to burn.999        #[weight = T::WeightInfo::burn_item()]1000        pub fn burn_item(origin, collection_id: CollectionId, item_id: TokenId) -> DispatchResult {10011002            let sender = ensure_signed(origin)?;1003            Self::collection_exists(collection_id)?;10041005            // Transfer permissions check1006            let target_collection = <Collection<T>>::get(collection_id);1007            ensure!(Self::is_item_owner(sender.clone(), collection_id, item_id) ||1008                Self::is_owner_or_admin_permissions(collection_id, sender.clone()),1009                Error::<T>::NoPermission);10101011            if target_collection.access == AccessMode::WhiteList {1012                Self::check_white_list(collection_id, &sender)?;1013            }10141015            match target_collection.mode1016            {1017                CollectionMode::NFT => Self::burn_nft_item(collection_id, item_id)?,1018                CollectionMode::Fungible(_)  => Self::burn_fungible_item(collection_id, item_id)?,1019                CollectionMode::ReFungible(_)  => Self::burn_refungible_item(collection_id, item_id, sender.clone())?,1020                _ => ()1021            };10221023            // call event1024            Self::deposit_event(RawEvent::ItemDestroyed(collection_id, item_id));10251026            Ok(())1027        }10281029        /// Change ownership of the token.1030        /// 1031        /// # Permissions1032        /// 1033        /// * Collection Owner1034        /// * Collection Admin1035        /// * Current NFT owner1036        ///1037        /// # Arguments1038        /// 1039        /// * recipient: Address of token recipient.1040        /// 1041        /// * collection_id.1042        /// 1043        /// * item_id: ID of the item1044        ///     * Non-Fungible Mode: Required.1045        ///     * Fungible Mode: Ignored.1046        ///     * Re-Fungible Mode: Required.1047        /// 1048        /// * value: Amount to transfer.1049        ///     * Non-Fungible Mode: Ignored1050        ///     * Fungible Mode: Must specify transferred amount1051        ///     * Re-Fungible Mode: Must specify transferred portion (between 0 and 1)1052        #[weight = T::WeightInfo::transfer()]1053        pub fn transfer(origin, recipient: T::AccountId, collection_id: CollectionId, item_id: TokenId, value: u128) -> DispatchResult {10541055            let sender = ensure_signed(origin)?;1056            let target_collection = <Collection<T>>::get(collection_id);10571058            // Limits check1059            Self::is_correct_transfer(collection_id, &target_collection, &recipient)?;10601061            // Transfer permissions check1062            ensure!(Self::is_item_owner(sender.clone(), collection_id, item_id) ||1063                Self::is_owner_or_admin_permissions(collection_id, sender.clone()),1064                Error::<T>::NoPermission);10651066            if target_collection.access == AccessMode::WhiteList {1067                Self::check_white_list(collection_id, &sender)?;1068                Self::check_white_list(collection_id, &recipient)?;1069            }10701071            match target_collection.mode1072            {1073                CollectionMode::NFT => Self::transfer_nft(collection_id, item_id, sender.clone(), recipient)?,1074                CollectionMode::Fungible(_)  => Self::transfer_fungible(collection_id, item_id, value, sender.clone(), recipient)?,1075                CollectionMode::ReFungible(_)  => Self::transfer_refungible(collection_id, item_id, value, sender.clone(), recipient)?,1076                _ => ()1077            };10781079            Ok(())1080        }10811082        /// Set, change, or remove approved address to transfer the ownership of the NFT.1083        /// 1084        /// # Permissions1085        /// 1086        /// * Collection Owner1087        /// * Collection Admin1088        /// * Current NFT owner1089        /// 1090        /// # Arguments1091        /// 1092        /// * approved: Address that is approved to transfer this NFT or zero (if needed to remove approval).1093        /// 1094        /// * collection_id.1095        /// 1096        /// * item_id: ID of the item.1097        #[weight = T::WeightInfo::approve()]1098        pub fn approve(origin, approved: T::AccountId, collection_id: CollectionId, item_id: TokenId) -> DispatchResult {10991100            let sender = ensure_signed(origin)?;11011102            // Transfer permissions check1103            let target_collection = <Collection<T>>::get(collection_id);1104            ensure!(Self::is_item_owner(sender.clone(), collection_id, item_id) ||1105                Self::is_owner_or_admin_permissions(collection_id, sender.clone()),1106                Error::<T>::NoPermission);11071108            if target_collection.access == AccessMode::WhiteList {1109                Self::check_white_list(collection_id, &sender)?;1110                Self::check_white_list(collection_id, &approved)?;1111            }11121113            // amount param stub1114            let amount = 100000000;11151116            let list_exists = <ApprovedList<T>>::contains_key(collection_id, (item_id, sender.clone()));1117            if list_exists {11181119                let mut list = <ApprovedList<T>>::get(collection_id, (item_id, sender.clone()));1120                let item_contains = list.iter().any(|i| i.approved == approved);11211122                if !item_contains {1123                    list.push(ApprovePermissions { approved: approved.clone(), amount: amount });1124                    <ApprovedList<T>>::insert(collection_id, (item_id, sender.clone()), list);1125                }1126            } else {11271128                let mut list = Vec::new();1129                list.push(ApprovePermissions { approved: approved.clone(), amount: amount });1130                <ApprovedList<T>>::insert(collection_id, (item_id, sender.clone()), list);1131            }11321133            Ok(())1134        }1135        1136        /// 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.1137        /// 1138        /// # Permissions1139        /// * Collection Owner1140        /// * Collection Admin1141        /// * Current NFT owner1142        /// * Address approved by current NFT owner1143        /// 1144        /// # Arguments1145        /// 1146        /// * from: Address that owns token.1147        /// 1148        /// * recipient: Address of token recipient.1149        /// 1150        /// * collection_id.1151        /// 1152        /// * item_id: ID of the item.1153        /// 1154        /// * value: Amount to transfer.1155        #[weight = T::WeightInfo::transfer_from()]1156        pub fn transfer_from(origin, from: T::AccountId, recipient: T::AccountId, collection_id: CollectionId, item_id: TokenId, value: u128 ) -> DispatchResult {11571158            let sender = ensure_signed(origin)?;1159            let mut appoved_transfer = false;11601161            // Check approve1162            if <ApprovedList<T>>::contains_key(collection_id, (item_id, from.clone())) {1163                let list_itm = <ApprovedList<T>>::get(collection_id, (item_id, from.clone()));1164                let opt_item = list_itm.iter().find(|i| i.approved == sender.clone());1165                if opt_item.is_some()1166                {1167                    appoved_transfer = true;1168                    ensure!(opt_item.unwrap().amount >= value, Error::<T>::TokenValueNotEnough);1169                }1170            }11711172            let target_collection = <Collection<T>>::get(collection_id);11731174            // Limits check1175            Self::is_correct_transfer(collection_id, &target_collection, &recipient)?;11761177            // Transfer permissions check         1178            ensure!(appoved_transfer || Self::is_owner_or_admin_permissions(collection_id, sender.clone()),1179            Error::<T>::NoPermission);11801181            if target_collection.access == AccessMode::WhiteList {1182                Self::check_white_list(collection_id, &sender)?;1183                Self::check_white_list(collection_id, &recipient)?;1184            }11851186            // remove approve1187            let approve_list: Vec<ApprovePermissions<T::AccountId>> = <ApprovedList<T>>::get(collection_id, (item_id, from.clone()))1188                .into_iter().filter(|i| i.approved != sender.clone()).collect();1189            <ApprovedList<T>>::insert(collection_id, (item_id, from.clone()), approve_list);119011911192            match target_collection.mode1193            {1194                CollectionMode::NFT => Self::transfer_nft(collection_id, item_id, from, recipient)?,1195                CollectionMode::Fungible(_)  => Self::transfer_fungible(collection_id, item_id, value, from.clone(), recipient)?,1196                CollectionMode::ReFungible(_)  => Self::transfer_refungible(collection_id, item_id, value, from.clone(), recipient)?,1197                _ => ()1198            };11991200            Ok(())1201        }12021203        ///1204        #[weight = 0]1205        pub fn safe_transfer_from(origin, collection_id: CollectionId, item_id: TokenId, new_owner: T::AccountId) -> DispatchResult {12061207            // let no_perm_mes = "You do not have permissions to modify this collection";1208            // ensure!(<ApprovedList<T>>::contains_key((collection_id, item_id)), no_perm_mes);1209            // let list_itm = <ApprovedList<T>>::get((collection_id, item_id));1210            // ensure!(list_itm.contains(&new_owner.clone()), no_perm_mes);12111212            // // on_nft_received  call12131214            // Self::transfer(origin, collection_id, item_id, new_owner)?;12151216            Ok(())1217        }12181219        /// Set off-chain data schema.1220        /// 1221        /// # Permissions1222        /// 1223        /// * Collection Owner1224        /// * Collection Admin1225        /// 1226        /// # Arguments1227        /// 1228        /// * collection_id.1229        /// 1230        /// * schema: String representing the offchain data schema.1231        #[weight = T::WeightInfo::set_variable_meta_data()]1232        pub fn set_variable_meta_data (1233            origin,1234            collection_id: CollectionId,1235            item_id: TokenId,1236            data: Vec<u8>1237        ) -> DispatchResult {1238            let sender = ensure_signed(origin)?;1239            1240            Self::collection_exists(collection_id)?;1241            1242            ensure!(ChainLimit::get().custom_data_limit >= data.len() as u32, Error::<T>::TokenVariableDataLimitExceeded);12431244            // Modify permissions check1245            let target_collection = <Collection<T>>::get(collection_id);1246            ensure!(Self::is_item_owner(sender.clone(), collection_id, item_id) ||1247                Self::is_owner_or_admin_permissions(collection_id, sender.clone()),1248                Error::<T>::NoPermission);12491250            Self::item_exists(collection_id, item_id, &target_collection.mode)?;12511252            match target_collection.mode1253            {1254                CollectionMode::NFT => Self::set_nft_variable_data(collection_id, item_id, data)?,1255                CollectionMode::ReFungible(_)  => Self::set_re_fungible_variable_data(collection_id, item_id, data)?,1256                CollectionMode::Fungible(_) => fail!(Error::<T>::CantStoreMetadataInFungibleTokens),1257                _ => fail!(Error::<T>::UnexpectedCollectionType)1258            };12591260            Ok(())1261        }1262        12631264        /// Set off-chain data schema.1265        /// 1266        /// # Permissions1267        /// 1268        /// * Collection Owner1269        /// * Collection Admin1270        /// 1271        /// # Arguments1272        /// 1273        /// * collection_id.1274        /// 1275        /// * schema: String representing the offchain data schema.1276        #[weight = T::WeightInfo::set_offchain_schema()]1277        pub fn set_offchain_schema(1278            origin,1279            collection_id: CollectionId,1280            schema: Vec<u8>1281        ) -> DispatchResult {1282            let sender = ensure_signed(origin)?;1283            Self::check_owner_or_admin_permissions(collection_id, sender.clone())?;12841285            let mut target_collection = <Collection<T>>::get(collection_id);1286            target_collection.offchain_schema = schema;1287            <Collection<T>>::insert(collection_id, target_collection);12881289            Ok(())1290        }12911292        /// Set const on-chain data schema.1293        /// 1294        /// # Permissions1295        /// 1296        /// * Collection Owner1297        /// * Collection Admin1298        /// 1299        /// # Arguments1300        /// 1301        /// * collection_id.1302        /// 1303        /// * schema: String representing the const on-chain data schema.1304        #[weight = T::WeightInfo::set_const_on_chain_schema()]1305        pub fn set_const_on_chain_schema (1306            origin,1307            collection_id: CollectionId,1308            schema: Vec<u8>1309        ) -> DispatchResult {1310            let sender = ensure_signed(origin)?;1311            Self::check_owner_or_admin_permissions(collection_id, sender.clone())?;13121313            let mut target_collection = <Collection<T>>::get(collection_id);1314            target_collection.const_on_chain_schema = schema;1315            <Collection<T>>::insert(collection_id, target_collection);13161317            Ok(())1318        }13191320        /// Set variable on-chain data schema.1321        /// 1322        /// # Permissions1323        /// 1324        /// * Collection Owner1325        /// * Collection Admin1326        /// 1327        /// # Arguments1328        /// 1329        /// * collection_id.1330        /// 1331        /// * schema: String representing the variable on-chain data schema.1332        #[weight = T::WeightInfo::set_const_on_chain_schema()]1333        pub fn set_variable_on_chain_schema (1334            origin,1335            collection_id: CollectionId,1336            schema: Vec<u8>1337        ) -> DispatchResult {1338            let sender = ensure_signed(origin)?;1339            Self::check_owner_or_admin_permissions(collection_id, sender.clone())?;13401341            let mut target_collection = <Collection<T>>::get(collection_id);1342            target_collection.variable_on_chain_schema = schema;1343            <Collection<T>>::insert(collection_id, target_collection);13441345            Ok(())1346        }13471348        // Sudo permissions function1349        #[weight = 0]1350        pub fn set_chain_limits(1351            origin,1352            limits: ChainLimits1353        ) -> DispatchResult {1354            ensure_root(origin)?;1355            <ChainLimit>::put(limits);1356            Ok(())1357        }13581359        /// Enable smart contract self-sponsoring.1360        /// 1361        /// # Permissions1362        /// 1363        /// * Contract Owner1364        /// 1365        /// # Arguments1366        /// 1367        /// * contract address1368        /// * enable flag1369        /// 1370        #[weight = T::WeightInfo::enable_contract_sponsoring()]1371        pub fn enable_contract_sponsoring(1372            origin,1373            contract_address: T::AccountId,1374            enable: bool1375        ) -> DispatchResult {13761377            let sender = ensure_signed(origin)?;13781379            #[cfg(feature = "runtime-benchmarks")]1380            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());13811382            let mut is_owner = false;1383            if <ContractOwner<T>>::contains_key(contract_address.clone()) {1384                let owner = <ContractOwner<T>>::get(&contract_address);1385                is_owner = sender == owner;1386            }1387            ensure!(is_owner, Error::<T>::NoPermission);13881389            <ContractSelfSponsoring<T>>::insert(contract_address, enable);1390            Ok(())1391        }13921393        /// Set the rate limit for contract sponsoring to specified number of blocks.1394        /// 1395        /// If not set (has the default value of 0 blocks), the sponsoring will be disabled. 1396        /// If set to the number B (for blocks), the transactions will be sponsored with a rate 1397        /// limit of B, i.e. fees for every transaction sent to this smart contract will be paid 1398        /// from contract endowment if there are at least B blocks between such transactions. 1399        /// Nonetheless, if transactions are sent more frequently, the fees are paid by the sender.1400        /// 1401        /// # Permissions1402        /// 1403        /// * Contract Owner1404        /// 1405        /// # Arguments1406        /// 1407        /// -`contract_address`: Address of the contract to sponsor1408        /// -`rate_limit`: Number of blocks to wait until the next sponsored transaction is allowed1409        /// 1410        #[weight = 0]1411        pub fn set_contract_sponsoring_rate_limit(1412            origin,1413            contract_address: T::AccountId,1414            rate_limit: T::BlockNumber1415        ) -> DispatchResult {1416            let sender = ensure_signed(origin)?;1417            let mut is_owner = false;1418            if <ContractOwner<T>>::contains_key(contract_address.clone()) {1419                let owner = <ContractOwner<T>>::get(&contract_address);1420                is_owner = sender == owner;1421            }1422            ensure!(is_owner, Error::<T>::NoPermission);14231424            <ContractSponsoringRateLimit<T>>::insert(contract_address, rate_limit);1425            Ok(())1426        }14271428        #[weight = 0]1429        pub fn set_collection_limits(1430            origin,1431            collection_id: u32,1432            limits: CollectionLimits,1433        ) -> DispatchResult {1434            let sender = ensure_signed(origin)?;1435            Self::check_owner_permissions(collection_id, sender.clone())?;1436            let mut target_collection = <Collection<T>>::get(collection_id);1437            let chain_limits = ChainLimit::get();1438            let climits = target_collection.limits;14391440            // collection bounds1441            ensure!(limits.sponsor_transfer_timeout <= MAX_SPONSOR_TIMEOUT &&1442                limits.account_token_ownership_limit <= MAX_TOKEN_OWNERSHIP,  1443                Error::<T>::CollectionLimitBoundsExceeded);14441445            // token_limit   check  prev1446            ensure!(climits.token_limit > limits.token_limit && 1447                limits.token_limit <= chain_limits.account_token_ownership_limit, 1448                Error::<T>::AccountTokenLimitExceeded);14491450            target_collection.limits = limits;1451            <Collection<T>>::insert(collection_id, target_collection);14521453            Ok(())1454        } 1455    }1456}14571458impl<T: Trait> Module<T> {14591460    fn is_correct_transfer(collection_id: CollectionId, collection: &CollectionType<T::AccountId>, recipient: &T::AccountId) -> DispatchResult {14611462        if !Self::is_owner_or_admin_permissions(collection_id, recipient.clone()) {14631464            // check token limit and account token limit1465            let account_items: u32 = <AddressTokens<T>>::get(collection_id, recipient).len() as u32;1466            ensure!(collection.limits.account_token_ownership_limit > account_items,  Error::<T>::AccountTokenLimitExceeded);1467        }14681469        Ok(())1470    }14711472    fn can_create_items_in_collection(collection_id: CollectionId, collection: &CollectionType<T::AccountId>, sender: &T::AccountId, owner: &T::AccountId) -> DispatchResult {14731474        if !Self::is_owner_or_admin_permissions(collection_id, sender.clone()) {14751476            // check token limit and account token limit1477            let total_items: u32 = ItemListIndex::get(collection_id);1478            let account_items: u32 = <AddressTokens<T>>::get(collection_id, owner).len() as u32;1479            ensure!(collection.limits.token_limit > total_items,  Error::<T>::CollectionTokenLimitExceeded);1480            ensure!(collection.limits.account_token_ownership_limit > account_items,  Error::<T>::AccountTokenLimitExceeded);1481            ensure!(collection.mint_mode == true, Error::<T>::PublicMintingNotAllowed);1482            Self::check_white_list(collection_id, owner)?;1483            Self::check_white_list(collection_id, sender)?;1484        }14851486        Ok(())1487    }14881489    fn validate_create_item_args(target_collection: &CollectionType<T::AccountId>, data: &CreateItemData) -> DispatchResult {1490        match target_collection.mode1491        {1492            CollectionMode::NFT => {1493                if let CreateItemData::NFT(data) = data {1494                    // check sizes1495                    ensure!(ChainLimit::get().custom_data_limit >= data.const_data.len() as u32, Error::<T>::TokenConstDataLimitExceeded);1496                    ensure!(ChainLimit::get().custom_data_limit >= data.variable_data.len() as u32, Error::<T>::TokenVariableDataLimitExceeded);1497                } else {1498                    fail!(Error::<T>::NotNftDataUsedToMintNftCollectionToken);1499                }1500            },1501            CollectionMode::Fungible(_) => {1502                if let CreateItemData::Fungible(_) = data {1503                } else {1504                    fail!(Error::<T>::NotFungibleDataUsedToMintFungibleCollectionToken);1505                }1506            },1507            CollectionMode::ReFungible(_) => {1508                if let CreateItemData::ReFungible(data) = data {15091510                    // check sizes1511                    ensure!(ChainLimit::get().custom_data_limit >= data.const_data.len() as u32, Error::<T>::TokenConstDataLimitExceeded);1512                    ensure!(ChainLimit::get().custom_data_limit >= data.variable_data.len() as u32, Error::<T>::TokenVariableDataLimitExceeded);1513                } else {1514                    fail!(Error::<T>::NotReFungibleDataUsedToMintReFungibleCollectionToken);1515                }1516            },1517            _ => { fail!(Error::<T>::UnexpectedCollectionType); }1518        };15191520        Ok(())1521    }15221523    fn create_item_no_validation(collection_id: CollectionId, collection: &CollectionType<T::AccountId>, owner: T::AccountId, data: CreateItemData) -> DispatchResult {1524        match data1525        {1526            CreateItemData::NFT(data) => {1527                let item = NftItemType {1528                    collection: collection_id,1529                    owner,1530                    const_data: data.const_data,1531                    variable_data: data.variable_data1532                };15331534                Self::add_nft_item(item)?;1535            },1536            CreateItemData::Fungible(_) => {1537                let item = FungibleItemType {1538                    collection: collection_id,1539                    owner,1540                    value: (10 as u128).pow(collection.decimal_points as u32)1541                };15421543                Self::add_fungible_item(item)?;1544            },1545            CreateItemData::ReFungible(data) => {1546                let mut owner_list = Vec::new();1547                let value = (10 as u128).pow(collection.decimal_points as u32);1548                owner_list.push(Ownership {owner: owner.clone(), fraction: value});15491550                let item = ReFungibleItemType {1551                    collection: collection_id,1552                    owner: owner_list,1553                    const_data: data.const_data,1554                    variable_data: data.variable_data1555                };15561557                Self::add_refungible_item(item)?;1558            }1559        };15601561        // call event1562        Self::deposit_event(RawEvent::ItemCreated(collection_id, <ItemListIndex>::get(collection_id)));15631564        Ok(())1565    }15661567    fn add_fungible_item(item: FungibleItemType<T::AccountId>) -> DispatchResult {1568        let current_index = <ItemListIndex>::get(item.collection)1569            .checked_add(1)1570            .ok_or(Error::<T>::NumOverflow)?;1571        let itemcopy = item.clone();1572        let owner = item.owner.clone();15731574        Self::add_token_index(item.collection, current_index, owner.clone())?;15751576        <ItemListIndex>::insert(item.collection, current_index);1577        <FungibleItemList<T>>::insert(item.collection, current_index, itemcopy);15781579        // Add current block1580        let v: Vec<BasketItem<T::AccountId, T::BlockNumber>> = Vec::new();1581        <FungibleTransferBasket<T>>::insert(item.collection, current_index, v);1582        1583        // Update balance1584        let new_balance = <Balance<T>>::get(item.collection, owner.clone())1585            .checked_add(item.value)1586            .ok_or(Error::<T>::NumOverflow)?;1587        <Balance<T>>::insert(item.collection, owner.clone(), new_balance);15881589        Ok(())1590    }15911592    fn add_refungible_item(item: ReFungibleItemType<T::AccountId>) -> DispatchResult {1593        let current_index = <ItemListIndex>::get(item.collection)1594            .checked_add(1)1595            .ok_or(Error::<T>::NumOverflow)?;1596        let itemcopy = item.clone();15971598        let value = item.owner.first().unwrap().fraction;1599        let owner = item.owner.first().unwrap().owner.clone();16001601        Self::add_token_index(item.collection, current_index, owner.clone())?;16021603        <ItemListIndex>::insert(item.collection, current_index);1604        <ReFungibleItemList<T>>::insert(item.collection, current_index, itemcopy);16051606        // Add current block1607        let block_number: T::BlockNumber = 0.into();1608        <ReFungibleTransferBasket<T>>::insert(item.collection, current_index, block_number);16091610        // Update balance1611        let new_balance = <Balance<T>>::get(item.collection, owner.clone())1612            .checked_add(value)1613            .ok_or(Error::<T>::NumOverflow)?;1614        <Balance<T>>::insert(item.collection, owner.clone(), new_balance);16151616        Ok(())1617    }16181619    fn add_nft_item(item: NftItemType<T::AccountId>) -> DispatchResult {1620        let current_index = <ItemListIndex>::get(item.collection)1621            .checked_add(1)1622            .ok_or(Error::<T>::NumOverflow)?;16231624        let item_owner = item.owner.clone();1625        let collection_id = item.collection.clone();1626        Self::add_token_index(collection_id, current_index, item.owner.clone())?;16271628        <ItemListIndex>::insert(collection_id, current_index);1629        <NftItemList<T>>::insert(collection_id, current_index, item);16301631        // Add current block1632        let block_number: T::BlockNumber = 0.into();1633        <NftTransferBasket<T>>::insert(collection_id, current_index, block_number);16341635        // Update balance1636        let new_balance = <Balance<T>>::get(collection_id, item_owner.clone())1637            .checked_add(1)1638            .ok_or(Error::<T>::NumOverflow)?;1639        <Balance<T>>::insert(collection_id, item_owner.clone(), new_balance);16401641        Ok(())1642    }16431644    fn burn_refungible_item(1645        collection_id: CollectionId,1646        item_id: TokenId,1647        owner: T::AccountId,1648    ) -> DispatchResult {1649        ensure!(1650            <ReFungibleItemList<T>>::contains_key(collection_id, item_id),1651            Error::<T>::TokenNotFound1652        );1653        let collection = <ReFungibleItemList<T>>::get(collection_id, item_id);1654        let item = collection1655            .owner1656            .iter()1657            .filter(|&i| i.owner == owner)1658            .next()1659            .unwrap();1660        Self::remove_token_index(collection_id, item_id, owner.clone())?;16611662        // remove approve list1663        <ApprovedList<T>>::remove(collection_id, (item_id, owner.clone()));16641665        // update balance1666        let new_balance = <Balance<T>>::get(collection_id, item.owner.clone())1667            .checked_sub(item.fraction)1668            .ok_or(Error::<T>::NumOverflow)?;1669        <Balance<T>>::insert(collection_id, item.owner.clone(), new_balance);16701671        <ReFungibleItemList<T>>::remove(collection_id, item_id);16721673        Ok(())1674    }16751676    fn burn_nft_item(collection_id: CollectionId, item_id: TokenId) -> DispatchResult {1677        ensure!(1678            <NftItemList<T>>::contains_key(collection_id, item_id),1679            Error::<T>::TokenNotFound1680        );1681        let item = <NftItemList<T>>::get(collection_id, item_id);1682        Self::remove_token_index(collection_id, item_id, item.owner.clone())?;16831684        // remove approve list1685        <ApprovedList<T>>::remove(collection_id, (item_id, item.owner.clone()));16861687        // update balance1688        let new_balance = <Balance<T>>::get(collection_id, item.owner.clone())1689            .checked_sub(1)1690            .ok_or(Error::<T>::NumOverflow)?;1691        <Balance<T>>::insert(collection_id, item.owner.clone(), new_balance);1692        <NftItemList<T>>::remove(collection_id, item_id);16931694        Ok(())1695    }16961697    fn burn_fungible_item(collection_id: CollectionId, item_id: TokenId) -> DispatchResult {1698        ensure!(1699            <FungibleItemList<T>>::contains_key(collection_id, item_id),1700            Error::<T>::TokenNotFound1701        );1702        let item = <FungibleItemList<T>>::get(collection_id, item_id);1703        Self::remove_token_index(collection_id, item_id, item.owner.clone())?;17041705        // remove approve list1706        <ApprovedList<T>>::remove(collection_id, (item_id, item.owner.clone()));17071708        // update balance1709        let new_balance = <Balance<T>>::get(collection_id, item.owner.clone())1710            .checked_sub(item.value)1711            .ok_or(Error::<T>::NumOverflow)?;1712        <Balance<T>>::insert(collection_id, item.owner.clone(), new_balance);17131714        <FungibleItemList<T>>::remove(collection_id, item_id);17151716        Ok(())1717    }17181719    fn collection_exists(collection_id: CollectionId) -> DispatchResult {1720        ensure!(1721            <Collection<T>>::contains_key(collection_id),1722            Error::<T>::CollectionNotFound1723        );1724        Ok(())1725    }17261727    fn check_owner_permissions(collection_id: CollectionId, subject: T::AccountId) -> DispatchResult {1728        Self::collection_exists(collection_id)?;17291730        let target_collection = <Collection<T>>::get(collection_id);1731        ensure!(1732            subject == target_collection.owner,1733            Error::<T>::NoPermission1734        );17351736        Ok(())1737    }17381739    fn is_owner_or_admin_permissions(collection_id: CollectionId, subject: T::AccountId) -> bool {1740        let target_collection = <Collection<T>>::get(collection_id);1741        let mut result: bool = subject == target_collection.owner;1742        let exists = <AdminList<T>>::contains_key(collection_id);17431744        if !result & exists {1745            if <AdminList<T>>::get(collection_id).contains(&subject) {1746                result = true1747            }1748        }17491750        result1751    }17521753    fn check_owner_or_admin_permissions(1754        collection_id: CollectionId,1755        subject: T::AccountId,1756    ) -> DispatchResult {1757        Self::collection_exists(collection_id)?;1758        let result = Self::is_owner_or_admin_permissions(collection_id, subject.clone());17591760        ensure!(1761            result,1762            Error::<T>::NoPermission1763        );1764        Ok(())1765    }17661767    fn is_item_owner(subject: T::AccountId, collection_id: CollectionId, item_id: TokenId) -> bool {1768        let target_collection = <Collection<T>>::get(collection_id);17691770        match target_collection.mode {1771            CollectionMode::NFT => {1772                <NftItemList<T>>::get(collection_id, item_id).owner == subject1773            }1774            CollectionMode::Fungible(_) => {1775                <FungibleItemList<T>>::get(collection_id, item_id).owner == subject1776            }1777            CollectionMode::ReFungible(_) => {1778                <ReFungibleItemList<T>>::get(collection_id, item_id)1779                    .owner1780                    .iter()1781                    .any(|i| i.owner == subject)1782            }1783            CollectionMode::Invalid => false,1784        }1785    }17861787    fn check_white_list(collection_id: CollectionId, address: &T::AccountId) -> DispatchResult {1788        let mes = Error::<T>::AddresNotInWhiteList;1789        ensure!(<WhiteList<T>>::contains_key(collection_id), mes);1790        let wl = <WhiteList<T>>::get(collection_id);1791        ensure!(wl.contains(address), mes);17921793        Ok(())1794    }17951796    fn transfer_fungible(1797        collection_id: CollectionId,1798        item_id: TokenId,1799        value: u128,1800        owner: T::AccountId,1801        new_owner: T::AccountId,1802    ) -> DispatchResult {1803        ensure!(1804            <FungibleItemList<T>>::contains_key(collection_id, item_id),1805            Error::<T>::TokenNotFound1806        );18071808        let full_item = <FungibleItemList<T>>::get(collection_id, item_id);1809        let amount = full_item.value;18101811        ensure!(amount >= value, Error::<T>::TokenValueTooLow);18121813        // update balance1814        let balance_old_owner = <Balance<T>>::get(collection_id, owner.clone())1815            .checked_sub(value)1816            .ok_or(Error::<T>::NumOverflow)?;1817        <Balance<T>>::insert(collection_id, owner.clone(), balance_old_owner);18181819        let mut new_owner_account_id = 0;1820        let new_owner_items = <AddressTokens<T>>::get(collection_id, new_owner.clone());1821        if new_owner_items.len() > 0 {1822            new_owner_account_id = new_owner_items[0];1823        }18241825        // transfer1826        if amount == value && new_owner_account_id == 0 {1827            // change owner1828            // new owner do not have account1829            let mut new_full_item = full_item.clone();1830            new_full_item.owner = new_owner.clone();1831            <FungibleItemList<T>>::insert(collection_id, item_id, new_full_item);18321833            // update balance1834            let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.clone())1835                .checked_add(value)1836                .ok_or(Error::<T>::NumOverflow)?;1837            <Balance<T>>::insert(collection_id, new_owner.clone(), balance_new_owner);18381839            // update index collection1840            Self::move_token_index(collection_id, item_id, owner.clone(), new_owner.clone())?;1841        } else {1842            let mut new_full_item = full_item.clone();1843            new_full_item.value -= value;18441845            // separate amount1846            if new_owner_account_id > 0 {1847                // new owner has account1848                let mut item = <FungibleItemList<T>>::get(collection_id, new_owner_account_id);1849                item.value += value;18501851                // update balance1852                let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.clone())1853                    .checked_add(value)1854                    .ok_or(Error::<T>::NumOverflow)?;1855                <Balance<T>>::insert(collection_id, new_owner.clone(), balance_new_owner);18561857                <FungibleItemList<T>>::insert(collection_id, new_owner_account_id, item);1858            } else {1859                // new owner do not have account1860                let item = FungibleItemType {1861                    collection: collection_id,1862                    owner: new_owner.clone(),1863                    value1864                };18651866                Self::add_fungible_item(item)?;1867            }18681869            if amount == value {1870                Self::remove_token_index(collection_id, item_id, full_item.owner.clone())?;18711872                // remove approve list1873                <ApprovedList<T>>::remove(collection_id, (item_id, full_item.owner.clone()));1874                <FungibleItemList<T>>::remove(collection_id, item_id);1875            }18761877            <FungibleItemList<T>>::insert(collection_id, item_id, new_full_item);1878        }18791880        Ok(())1881    }18821883    fn transfer_refungible(1884        collection_id: CollectionId,1885        item_id: TokenId,1886        value: u128,1887        owner: T::AccountId,1888        new_owner: T::AccountId,1889    ) -> DispatchResult {1890        ensure!(1891            <ReFungibleItemList<T>>::contains_key(collection_id, item_id),1892            Error::<T>::TokenNotFound1893        );18941895        let full_item = <ReFungibleItemList<T>>::get(collection_id, item_id);1896        let item = full_item1897            .owner1898            .iter()1899            .filter(|i| i.owner == owner)1900            .next()1901            .ok_or(Error::<T>::NumOverflow)?;1902        let amount = item.fraction;19031904        ensure!(amount >= value, Error::<T>::TokenValueTooLow);19051906        // update balance1907        let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.clone())1908            .checked_sub(value)1909            .ok_or(Error::<T>::NumOverflow)?;1910        <Balance<T>>::insert(collection_id, item.owner.clone(), balance_old_owner);19111912        let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.clone())1913            .checked_add(value)1914            .ok_or(Error::<T>::NumOverflow)?;1915        <Balance<T>>::insert(collection_id, new_owner.clone(), balance_new_owner);19161917        let old_owner = item.owner.clone();1918        let new_owner_has_account = full_item.owner.iter().any(|i| i.owner == new_owner);19191920        // transfer1921        if amount == value && !new_owner_has_account {1922            // change owner1923            // new owner do not have account1924            let mut new_full_item = full_item.clone();1925            new_full_item1926                .owner1927                .iter_mut()1928                .find(|i| i.owner == owner)1929                .unwrap()1930                .owner = new_owner.clone();1931            <ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);19321933            // update index collection1934            Self::move_token_index(collection_id, item_id, old_owner.clone(), new_owner.clone())?;1935        } else {1936            let mut new_full_item = full_item.clone();1937            new_full_item1938                .owner1939                .iter_mut()1940                .find(|i| i.owner == owner)1941                .unwrap()1942                .fraction -= value;19431944            // separate amount1945            if new_owner_has_account {1946                // new owner has account1947                new_full_item1948                    .owner1949                    .iter_mut()1950                    .find(|i| i.owner == new_owner)1951                    .unwrap()1952                    .fraction += value;1953            } else {1954                // new owner do not have account1955                new_full_item.owner.push(Ownership {1956                    owner: new_owner.clone(),1957                    fraction: value,1958                });1959                Self::add_token_index(collection_id, item_id, new_owner.clone())?;1960            }19611962            <ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);1963        }19641965        Ok(())1966    }19671968    fn transfer_nft(1969        collection_id: CollectionId,1970        item_id: TokenId,1971        sender: T::AccountId,1972        new_owner: T::AccountId,1973    ) -> DispatchResult {1974        ensure!(1975            <NftItemList<T>>::contains_key(collection_id, item_id),1976            Error::<T>::TokenNotFound1977        );19781979        let mut item = <NftItemList<T>>::get(collection_id, item_id);19801981        ensure!(1982            sender == item.owner,1983            Error::<T>::MustBeTokenOwner1984        );19851986        // update balance1987        let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.clone())1988            .checked_sub(1)1989            .ok_or(Error::<T>::NumOverflow)?;1990        <Balance<T>>::insert(collection_id, item.owner.clone(), balance_old_owner);19911992        let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.clone())1993            .checked_add(1)1994            .ok_or(Error::<T>::NumOverflow)?;1995        <Balance<T>>::insert(collection_id, new_owner.clone(), balance_new_owner);19961997        // change owner1998        let old_owner = item.owner.clone();1999        item.owner = new_owner.clone();2000        <NftItemList<T>>::insert(collection_id, item_id, item);20012002        // update index collection2003        Self::move_token_index(collection_id, item_id, old_owner.clone(), new_owner.clone())?;20042005        // reset approved list2006        <ApprovedList<T>>::remove(collection_id, (item_id, old_owner));2007        Ok(())2008    }2009    2010    fn item_exists(2011        collection_id: CollectionId,2012        item_id: TokenId,2013        mode: &CollectionMode2014    ) -> DispatchResult {2015        match mode {2016            CollectionMode::NFT => ensure!(<NftItemList<T>>::contains_key(collection_id, item_id), Error::<T>::TokenNotFound),2017            CollectionMode::ReFungible(_) => ensure!(<ReFungibleItemList<T>>::contains_key(collection_id, item_id), Error::<T>::TokenNotFound),2018            CollectionMode::Fungible(_) => ensure!(<FungibleItemList<T>>::contains_key(collection_id, item_id), Error::<T>::TokenNotFound),2019            _ => ()2020        };2021        2022        Ok(())2023    }20242025    fn set_re_fungible_variable_data(2026        collection_id: CollectionId,2027        item_id: TokenId,2028        data: Vec<u8>2029    ) -> DispatchResult {2030        let mut item = <ReFungibleItemList<T>>::get(collection_id, item_id);20312032        item.variable_data = data;20332034        <ReFungibleItemList<T>>::insert(collection_id, item_id, item);20352036        Ok(())2037    }20382039    fn set_nft_variable_data(2040        collection_id: CollectionId,2041        item_id: TokenId,2042        data: Vec<u8>2043    ) -> DispatchResult {2044        let mut item = <NftItemList<T>>::get(collection_id, item_id);2045        2046        item.variable_data = data;20472048        <NftItemList<T>>::insert(collection_id, item_id, item);2049        2050        Ok(())2051    }20522053    fn init_collection(item: &CollectionType<T::AccountId>) {2054        // check params2055        assert!(2056            item.decimal_points <= MAX_DECIMAL_POINTS,2057            "decimal_points parameter must be lower than MAX_DECIMAL_POINTS"2058        );2059        assert!(2060            item.name.len() <= 64,2061            "Collection name can not be longer than 63 char"2062        );2063        assert!(2064            item.name.len() <= 256,2065            "Collection description can not be longer than 255 char"2066        );2067        assert!(2068            item.token_prefix.len() <= 16,2069            "Token prefix can not be longer than 15 char"2070        );20712072        // Generate next collection ID2073        let next_id = CreatedCollectionCount::get()2074            .checked_add(1)2075            .unwrap();20762077        CreatedCollectionCount::put(next_id);2078    }20792080    fn init_nft_token(item: &NftItemType<T::AccountId>) {2081        let current_index = <ItemListIndex>::get(item.collection)2082            .checked_add(1)2083            .unwrap();20842085        let item_owner = item.owner.clone();2086        let collection_id = item.collection.clone();2087        Self::add_token_index(collection_id, current_index, item.owner.clone()).unwrap();20882089        <ItemListIndex>::insert(collection_id, current_index);20902091        // Update balance2092        let new_balance = <Balance<T>>::get(collection_id, item_owner.clone())2093            .checked_add(1)2094            .unwrap();2095        <Balance<T>>::insert(collection_id, item_owner.clone(), new_balance);2096    }20972098    fn init_fungible_token(item: &FungibleItemType<T::AccountId>) {2099        let current_index = <ItemListIndex>::get(item.collection)2100            .checked_add(1)2101            .unwrap();2102        let owner = item.owner.clone();21032104        Self::add_token_index(item.collection, current_index, owner.clone()).unwrap();21052106        <ItemListIndex>::insert(item.collection, current_index);21072108        // Update balance2109        let new_balance = <Balance<T>>::get(item.collection, owner.clone())2110            .checked_add(item.value)2111            .unwrap();2112        <Balance<T>>::insert(item.collection, owner.clone(), new_balance);2113    }21142115    fn init_refungible_token(item: &ReFungibleItemType<T::AccountId>) {2116        let current_index = <ItemListIndex>::get(item.collection)2117            .checked_add(1)2118            .unwrap();21192120        let value = item.owner.first().unwrap().fraction;2121        let owner = item.owner.first().unwrap().owner.clone();21222123        Self::add_token_index(item.collection, current_index, owner.clone()).unwrap();21242125        <ItemListIndex>::insert(item.collection, current_index);21262127        // Update balance2128        let new_balance = <Balance<T>>::get(item.collection, owner.clone())2129            .checked_add(value)2130            .unwrap();2131        <Balance<T>>::insert(item.collection, owner.clone(), new_balance);2132    }21332134    fn add_token_index(collection_id: CollectionId, item_index: TokenId, owner: T::AccountId) -> DispatchResult {21352136        // add to account limit2137        if <AccountItemCount<T>>::contains_key(owner.clone()) {21382139            // bound Owned tokens by a single address2140            let count = <AccountItemCount<T>>::get(owner.clone());2141            ensure!(count < ChainLimit::get().account_token_ownership_limit, Error::<T>::AddressOwnershipLimitExceeded);21422143            <AccountItemCount<T>>::insert(owner.clone(), count2144                .checked_add(1)2145                .ok_or(Error::<T>::NumOverflow)?);2146        }2147        else {2148            <AccountItemCount<T>>::insert(owner.clone(), 1);2149        }21502151        let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner.clone());2152        if list_exists {2153            let mut list = <AddressTokens<T>>::get(collection_id, owner.clone());2154            let item_contains = list.contains(&item_index.clone());21552156            if !item_contains {2157                list.push(item_index.clone());2158            }21592160            <AddressTokens<T>>::insert(collection_id, owner.clone(), list);2161        } else {2162            let mut itm = Vec::new();2163            itm.push(item_index.clone());2164            <AddressTokens<T>>::insert(collection_id, owner, itm);2165            2166        }21672168        Ok(())2169    }21702171    fn remove_token_index(2172        collection_id: CollectionId,2173        item_index: TokenId,2174        owner: T::AccountId,2175    ) -> DispatchResult {21762177        // update counter2178        <AccountItemCount<T>>::insert(owner.clone(), 2179            <AccountItemCount<T>>::get(owner.clone())2180            .checked_sub(1)2181            .ok_or(Error::<T>::NumOverflow)?);218221832184        let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner.clone());2185        if list_exists {2186            let mut list = <AddressTokens<T>>::get(collection_id, owner.clone());2187            let item_contains = list.contains(&item_index.clone());21882189            if item_contains {2190                list.retain(|&item| item != item_index);2191                <AddressTokens<T>>::insert(collection_id, owner, list);2192            }2193        }21942195        Ok(())2196    }21972198    fn move_token_index(2199        collection_id: CollectionId,2200        item_index: TokenId,2201        old_owner: T::AccountId,2202        new_owner: T::AccountId,2203    ) -> DispatchResult {2204        Self::remove_token_index(collection_id, item_index, old_owner)?;2205        Self::add_token_index(collection_id, item_index, new_owner)?;22062207        Ok(())2208    }2209}22102211////////////////////////////////////////////////////////////////////////////////////////////////////2212// Economic models2213// #region22142215/// Fee multiplier.2216pub type Multiplier = FixedU128;22172218type BalanceOf<T> = <<T as transaction_payment::Trait>::Currency as Currency<2219    <T as system::Trait>::AccountId,2220>>::Balance;2221type NegativeImbalanceOf<T> = <<T as transaction_payment::Trait>::Currency as Currency<2222    <T as system::Trait>::AccountId,2223>>::NegativeImbalance;22242225/// Require the transactor pay for themselves and maybe include a tip to gain additional priority2226/// in the queue.2227#[derive(Encode, Decode, Clone, Eq, PartialEq)]2228pub struct ChargeTransactionPayment<T: Trait + Send + Sync>(2229    #[codec(compact)] BalanceOf<T>2230);22312232impl<T: Trait + Send + Sync> sp_std::fmt::Debug2233    for ChargeTransactionPayment<T>2234{2235    #[cfg(feature = "std")]2236    fn fmt(&self, f: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {2237        write!(f, "ChargeTransactionPayment<{:?}>", self.0)2238    }2239    #[cfg(not(feature = "std"))]2240    fn fmt(&self, _: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {2241        Ok(())2242    }2243}22442245impl<T: Trait + Send + Sync> ChargeTransactionPayment<T>2246where2247    T::Call: Dispatchable<Info = DispatchInfo, PostInfo = PostDispatchInfo> + IsSubType<Call<T>> + IsSubType<pallet_contracts::Call<T>>,2248    BalanceOf<T>: Send + Sync + FixedPointOperand,2249{2250    /// utility constructor. Used only in client/factory code.2251    pub fn from(fee: BalanceOf<T>) -> Self {2252        Self(fee)2253    }22542255    pub fn traditional_fee(2256        len: usize,2257        info: &DispatchInfoOf<T::Call>,2258        tip: BalanceOf<T>,2259    ) -> BalanceOf<T>2260    where2261        T::Call: Dispatchable<Info = DispatchInfo>,2262    {2263        <transaction_payment::Module<T>>::compute_fee(len as u32, info, tip)2264    }22652266    fn withdraw_fee(2267        &self,2268        who: &T::AccountId,2269        call: &T::Call,2270        info: &DispatchInfoOf<T::Call>,2271        len: usize,2272    ) -> Result<(BalanceOf<T>, Option<NegativeImbalanceOf<T>>), TransactionValidityError> {2273        let tip = self.0;22742275        // Set fee based on call type. Creating collection costs 1 Unique.2276        // All other transactions have traditional fees so far2277        // let fee = match call.is_sub_type() {2278        //     Some(Call::create_collection(..)) => <BalanceOf<T>>::from(1_000_000_000),2279        //     _ => Self::traditional_fee(len, info, tip), // Flat fee model, use only for testing purposes2280        //                                                 // _ => <BalanceOf<T>>::from(100)2281        // };2282        let fee = Self::traditional_fee(len, info, tip);22832284        // Determine who is paying transaction fee based on ecnomic model2285        // Parse call to extract collection ID and access collection sponsor2286        let mut sponsor: T::AccountId = match IsSubType::<Call<T>>::is_sub_type(call) {2287            Some(Call::create_item(collection_id, _owner, _properties)) => {22882289                // check free create limit2290                if <Collection<T>>::get(collection_id).limits.sponsored_data_size >= (_properties.len() as u32)2291                {2292                    <Collection<T>>::get(collection_id).sponsor2293                } else {2294                    T::AccountId::default()2295                }2296            }2297            Some(Call::transfer(_new_owner, collection_id, _item_id, _value)) => {2298                2299                let _collection_limits = <Collection<T>>::get(collection_id).limits;2300                let _collection_mode = <Collection<T>>::get(collection_id).mode;23012302                // sponsor timeout2303                let sponsor_transfer = match _collection_mode {2304                    CollectionMode::NFT => {23052306                        // get correct limit2307                        let limit: u32 = if _collection_limits.sponsor_transfer_timeout > 0 {2308                            _collection_limits.sponsor_transfer_timeout2309                        } else {2310                            ChainLimit::get().nft_sponsor_transfer_timeout2311                        };23122313                        let basket = <NftTransferBasket<T>>::get(collection_id, _item_id);2314                        let block_number = <system::Module<T>>::block_number() as T::BlockNumber;2315                        let limit_time = basket + limit.into();2316                        if block_number >= limit_time {2317                            <NftTransferBasket<T>>::insert(collection_id, _item_id, block_number);2318                            true2319                        }2320                        else {2321                            false2322                        }2323                    }2324                    CollectionMode::Fungible(_) => {23252326                        // get correct limit2327                        let limit: u32 = if _collection_limits.sponsor_transfer_timeout > 0 {2328                            _collection_limits.sponsor_transfer_timeout2329                        } else {2330                            ChainLimit::get().fungible_sponsor_transfer_timeout2331                        };23322333                        let mut basket = <FungibleTransferBasket<T>>::get(collection_id, _item_id);2334                        let block_number = <system::Module<T>>::block_number() as T::BlockNumber;2335                        if basket.iter().any(|i| i.address == _new_owner.clone())2336                        {2337                            let item = basket.iter_mut().find(|i| i.address == _new_owner.clone()).unwrap().clone();2338                            let limit_time = item.start_block + limit.into();2339                            if block_number >= limit_time {2340                                basket.retain(|x| x.address == item.address);2341                                basket.push(BasketItem { start_block: block_number, address: _new_owner.clone() });2342                                <FungibleTransferBasket<T>>::insert(collection_id, _item_id, basket);2343                                true2344                            }2345                            else {2346                                false2347                            }2348                        }2349                        else {2350                            basket.push(BasketItem { start_block: block_number, address: _new_owner.clone()});2351                            true2352                        }2353                    }2354                    CollectionMode::ReFungible(_) => {23552356                        // get correct limit2357                        let limit: u32 = if _collection_limits.sponsor_transfer_timeout > 0 {2358                            _collection_limits.sponsor_transfer_timeout2359                        } else {2360                            ChainLimit::get().refungible_sponsor_transfer_timeout2361                        };23622363                        let basket = <ReFungibleTransferBasket<T>>::get(collection_id, _item_id);2364                        let block_number = <system::Module<T>>::block_number() as T::BlockNumber;2365                        let limit_time = basket + limit.into();2366                        if block_number >= limit_time {2367                            <ReFungibleTransferBasket<T>>::insert(collection_id, _item_id, block_number);2368                            true2369                        } else {2370                            false2371                        }2372                    }2373                    _ => {2374                        false2375                    },2376                };23772378                if !sponsor_transfer {2379                    T::AccountId::default()2380                } else {2381                    <Collection<T>>::get(collection_id).sponsor2382                }2383            }23842385            _ => T::AccountId::default(),2386        };23872388        // Sponsor smart contracts2389        sponsor = match IsSubType::<pallet_contracts::Call<T>>::is_sub_type(call) {23902391            // On instantiation: set the contract owner2392            Some(pallet_contracts::Call::instantiate(_endowment, _gas_limit, code_hash, data)) => {23932394                let new_contract_address = <T as pallet_contracts::Trait>::DetermineContractAddress::contract_address_for(2395                    code_hash,2396                    &data,2397                    &who,2398                );2399                <ContractOwner<T>>::insert(new_contract_address.clone(), who.clone());24002401                T::AccountId::default()2402            },24032404            // When the contract is called, check if the sponsoring is enabled and pay fees from contract endowment if it is2405            Some(pallet_contracts::Call::call(dest, _value, _gas_limit, _data)) => {24062407                let called_contract: T::AccountId = T::Lookup::lookup((*dest).clone()).unwrap_or(T::AccountId::default());24082409                let mut sponsor_transfer = false;2410                if <ContractSponsoringRateLimit<T>>::contains_key(called_contract.clone()) {2411                    let last_tx_block = <ContractSponsorBasket<T>>::get((&called_contract, &who));2412                    let block_number = <system::Module<T>>::block_number() as T::BlockNumber;2413                    let rate_limit = <ContractSponsoringRateLimit<T>>::get(&called_contract);2414                    let limit_time = last_tx_block + rate_limit;24152416                    if block_number >= limit_time {2417                        <ContractSponsorBasket<T>>::insert((called_contract.clone(), who.clone()), block_number);2418                        sponsor_transfer = true;2419                    }2420                } else {2421                    sponsor_transfer = false;2422                }2423               2424                2425                let mut sp = T::AccountId::default();2426                if sponsor_transfer {2427                    if <ContractSelfSponsoring<T>>::contains_key(called_contract.clone()) {2428                        if <ContractSelfSponsoring<T>>::get(called_contract.clone()) {2429                            sp = called_contract;2430                        }2431                    }2432                }24332434                sp2435            },24362437            _ => sponsor,2438        };24392440        let mut who_pays_fee: T::AccountId = sponsor.clone();2441        if sponsor == T::AccountId::default() {2442            who_pays_fee = who.clone();2443        }24442445        // Only mess with balances if fee is not zero.2446        if fee.is_zero() {2447            return Ok((fee, None));2448        }24492450        match <T as transaction_payment::Trait>::Currency::withdraw(2451            &who_pays_fee,2452            fee,2453            if tip.is_zero() {2454                WithdrawReason::TransactionPayment.into()2455            } else {2456                WithdrawReason::TransactionPayment | WithdrawReason::Tip2457            },2458            ExistenceRequirement::KeepAlive,2459        ) {2460            Ok(imbalance) => Ok((fee, Some(imbalance))),2461            Err(_) => Err(InvalidTransaction::Payment.into()),2462        }2463    }2464}246524662467impl<T: Trait + Send + Sync> SignedExtension2468    for ChargeTransactionPayment<T>2469where2470    BalanceOf<T>: Send + Sync + From<u64> + FixedPointOperand,2471    T::Call: Dispatchable<Info = DispatchInfo, PostInfo = PostDispatchInfo> + IsSubType<Call<T>> + IsSubType<pallet_contracts::Call<T>>,2472{2473    const IDENTIFIER: &'static str = "ChargeTransactionPayment";2474    type AccountId = T::AccountId;2475    type Call = T::Call;2476    type AdditionalSigned = ();2477    type Pre = (2478        BalanceOf<T>,2479        Self::AccountId,2480        Option<NegativeImbalanceOf<T>>,2481        BalanceOf<T>,2482    );2483    fn additional_signed(&self) -> sp_std::result::Result<(), TransactionValidityError> {2484        Ok(())2485    }24862487    fn validate(2488        &self,2489        _who: &Self::AccountId,2490        _call: &Self::Call,2491        _info: &DispatchInfoOf<Self::Call>,2492        _len: usize,2493    ) -> TransactionValidity {2494        Ok(ValidTransaction::default())2495    }24962497    fn pre_dispatch(2498        self,2499        who: &Self::AccountId,2500        call: &Self::Call,2501        info: &DispatchInfoOf<Self::Call>,2502        len: usize,2503    ) -> Result<Self::Pre, TransactionValidityError> {2504        let (fee, imbalance) = self.withdraw_fee(who, call, info, len)?;2505        Ok((self.0, who.clone(), imbalance, fee))2506    }25072508    fn post_dispatch(2509        pre: Self::Pre,2510        info: &DispatchInfoOf<Self::Call>,2511        post_info: &PostDispatchInfoOf<Self::Call>,2512        len: usize,2513        _result: &DispatchResult,2514    ) -> Result<(), TransactionValidityError> {2515        let (tip, who, imbalance, fee) = pre;2516        if let Some(payed) = imbalance {2517            let actual_fee = <transaction_payment::Module<T>>::compute_actual_fee(2518                len as u32, info, post_info, tip,2519            );2520            let refund = fee.saturating_sub(actual_fee);2521            let actual_payment =2522                match <T as transaction_payment::Trait>::Currency::deposit_into_existing(2523                    &who, refund,2524                ) {2525                    Ok(refund_imbalance) => {2526                        // The refund cannot be larger than the up front payed max weight.2527                        // `PostDispatchInfo::calc_unspent` guards against such a case.2528                        match payed.offset(refund_imbalance) {2529                            Ok(actual_payment) => actual_payment,2530                            Err(_) => return Err(InvalidTransaction::Payment.into()),2531                        }2532                    }2533                    // We do not recreate the account using the refund. The up front payment2534                    // is gone in that case.2535                    Err(_) => payed,2536                };2537            let imbalances = actual_payment.split(tip);2538            <T as transaction_payment::Trait>::OnTransactionPayment::on_unbalanceds(2539                Some(imbalances.0).into_iter().chain(Some(imbalances.1)),2540            );2541        }2542        Ok(())2543    }2544}25452546// #endregion