git.delta.rocks / unique-network / refs/commits / 651e1c77e229

1//2// This file is subject to the terms and conditions defined in3// file 'LICENSE', which is part of this source code package.4//56#![recursion_limit = "1024"]78#![cfg_attr(not(feature = "std"), no_std)]910#[cfg(feature = "std")]11pub use serde::*;1213use core::ops::{Deref, DerefMut};14use codec::{Decode, Encode};15pub use frame_support::{16    construct_runtime, decl_event, decl_module, decl_storage, decl_error,17    dispatch::DispatchResult,18    ensure, fail, parameter_types,19    traits::{20        Currency, ExistenceRequirement, Get, Imbalance, KeyOwnerProofSystem, OnUnbalanced,21        Randomness, IsSubType, WithdrawReasons,22    },23    weights::{24        constants::{BlockExecutionWeight, ExtrinsicBaseWeight, RocksDbWeight, WEIGHT_PER_SECOND},25        DispatchInfo, GetDispatchInfo, IdentityFee, Pays, PostDispatchInfo, Weight,26        WeightToFeePolynomial, DispatchClass,27    },28    StorageValue,29    transactional,30};3132use frame_system::{self as system, ensure_signed, ensure_root};33use sp_core::{H160, H256};34use sp_runtime::sp_std::prelude::Vec;35use sp_runtime::{36    traits::{37        Hash, DispatchInfoOf, Dispatchable, PostDispatchInfoOf, Saturating, SaturatedConversion, SignedExtension, Zero,38    },39    transaction_validity::{40        TransactionPriority, InvalidTransaction, TransactionValidity, TransactionValidityError, ValidTransaction,41    },42    FixedPointOperand, FixedU128,43};44use sp_runtime::traits::StaticLookup;45use pallet_contracts::chain_extension::UncheckedFrom;46use pallet_ethereum::EthereumTransactionSender;47use pallet_transaction_payment::OnChargeTransaction;4849#[cfg(test)]50mod mock;5152#[cfg(test)]53mod tests;5455mod default_weights;56mod eth;5758pub use eth::account::*;5960pub const MAX_DECIMAL_POINTS: DecimalPoints = 30;61pub const MAX_REFUNGIBLE_PIECES: u128 = 1_000_000_000_000_000_000_000;62pub const MAX_SPONSOR_TIMEOUT: u32 = 10_368_000;63pub const MAX_TOKEN_OWNERSHIP: u32 = 10_000_000;6465// Structs66// #region6768pub type CollectionId = u32;69pub type TokenId = u32;70pub type DecimalPoints = u8;7172#[derive(Encode, Decode, Eq, Debug, Clone, PartialEq)]73#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]74pub enum CollectionMode {75    Invalid,76    NFT,77    // decimal points78    Fungible(DecimalPoints),79    ReFungible,80}8182impl Default for CollectionMode {83    fn default() -> Self {84        Self::Invalid85    }86}8788impl Into<u8> for CollectionMode {89    fn into(self) -> u8 {90        match self {91            CollectionMode::Invalid => 0,92            CollectionMode::NFT => 1,93            CollectionMode::Fungible(_) => 2,94            CollectionMode::ReFungible => 3,95        }96    }97}9899#[derive(Encode, Decode, Eq, Debug, Clone, PartialEq)]100#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]101pub enum AccessMode {102    Normal,103    WhiteList,104}105impl Default for AccessMode {106    fn default() -> Self {107        Self::Normal108    }109}110111#[derive(Encode, Decode, Eq, Debug, Clone, PartialEq)]112#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]113pub enum SchemaVersion {114    ImageURL,115    Unique,116}117impl Default for SchemaVersion {118    fn default() -> Self {119        Self::ImageURL120    }121}122123#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]124#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]125pub struct Ownership<AccountId> {126    pub owner: AccountId,127    pub fraction: u128,128}129130#[derive(Encode, Decode, Debug, Clone, PartialEq)]131#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]132pub enum SponsorshipState<AccountId> {133    /// The fees are applied to the transaction sender134    Disabled,135    Unconfirmed(AccountId),136    /// Transactions are sponsored by specified account137    Confirmed(AccountId),138}139140impl<AccountId> SponsorshipState<AccountId> {141    fn sponsor(&self) -> Option<&AccountId> {142        match self {143            Self::Confirmed(sponsor) => Some(sponsor),144            _ => None,145        }146    }147148    fn pending_sponsor(&self) -> Option<&AccountId> {149        match self {150            Self::Unconfirmed(sponsor) | Self::Confirmed(sponsor) => Some(sponsor),151            _ => None,152        }153    }154155    fn confirmed(&self) -> bool {156        matches!(self, Self::Confirmed(_))157    }158}159160impl<T> Default for SponsorshipState<T> {161    fn default() -> Self {162        Self::Disabled163    }164}165166#[derive(Encode, Decode, Clone, PartialEq)]167#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]168pub struct Collection<T: Config> {169    pub owner: T::CrossAccountId,170    pub mode: CollectionMode,171    pub access: AccessMode,172    pub decimal_points: DecimalPoints,173    pub name: Vec<u16>,        // 64 include null escape char174    pub description: Vec<u16>, // 256 include null escape char175    pub token_prefix: Vec<u8>, // 16 include null escape char176    pub mint_mode: bool,177    pub offchain_schema: Vec<u8>,178    pub schema_version: SchemaVersion,179    pub sponsorship: SponsorshipState<T::AccountId>,180    pub limits: CollectionLimits<T::BlockNumber>, // Collection private restrictions 181    pub variable_on_chain_schema: Vec<u8>, //182    pub const_on_chain_schema: Vec<u8>, //183}184185pub struct CollectionHandle<T: Config> {186    pub id: CollectionId,187    collection: Collection<T>,188    logs: eth::log::LogRecorder,189}190impl<T: Config> CollectionHandle<T> {191	pub fn get(id: CollectionId) -> Option<Self> {192		<CollectionById<T>>::get(id)193			.map(|collection| Self {194				id,195				collection,196                logs: eth::log::LogRecorder::default(),197			})198	}199    pub fn log(&self, topics: Vec<H256>, data: eth::abi::AbiWriter) {200        self.logs.log(topics, data)201    }202    pub fn into_inner(self) -> Collection<T> {203        self.collection.clone()204    }205}206207impl<T: Config> Deref for CollectionHandle<T> {208    type Target = Collection<T>;209210    fn deref(&self) -> &Self::Target {211        &self.collection212    }213}214215impl<T: Config> DerefMut for CollectionHandle<T> {216    fn deref_mut(&mut self) -> &mut Self::Target {217        &mut self.collection218    }219}220221#[derive(Encode, Decode, Debug, Clone, PartialEq)]222#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]223pub struct NftItemType<AccountId> {224    pub owner: AccountId,225    pub const_data: Vec<u8>,226    pub variable_data: Vec<u8>,227}228229#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]230#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]231pub struct FungibleItemType {232    pub value: u128,233}234235#[derive(Encode, Decode, Debug, Clone, PartialEq)]236#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]237pub struct ReFungibleItemType<AccountId> {238    pub owner: Vec<Ownership<AccountId>>,239    pub const_data: Vec<u8>,240    pub variable_data: Vec<u8>,241}242243// #[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]244// #[cfg_attr(feature = "std", derive(Serialize, Deserialize))]245// pub struct VestingItem<AccountId, Moment> {246//     pub sender: AccountId,247//     pub recipient: AccountId,248//     pub collection_id: CollectionId,249//     pub item_id: TokenId,250//     pub amount: u64,251//     pub vesting_date: Moment,252// }253254#[derive(Encode, Decode, Debug, Clone, PartialEq)]255#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]256pub struct CollectionLimits<BlockNumber: Encode + Decode> {257    pub account_token_ownership_limit: u32,258    pub sponsored_data_size: u32,259    /// None - setVariableMetadata is not sponsored260    /// Some(v) - setVariableMetadata is sponsored 261    ///           if there is v block between txs262    pub sponsored_data_rate_limit: Option<BlockNumber>,263    pub token_limit: u32,264265    // Timeouts for item types in passed blocks266    pub sponsor_transfer_timeout: u32,267    pub owner_can_transfer: bool,268    pub owner_can_destroy: bool,269}270271impl<BlockNumber: Encode + Decode> Default for CollectionLimits<BlockNumber> {272    fn default() -> Self {273        Self { 274            account_token_ownership_limit: 10_000_000, 275            token_limit: u32::max_value(),276            sponsored_data_size: u32::MAX, 277            sponsored_data_rate_limit: None,278            sponsor_transfer_timeout: 14400,279            owner_can_transfer: true,280            owner_can_destroy: true281        }282    }283}284285#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]286#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]287pub struct ChainLimits {288    pub collection_numbers_limit: u32,289    pub account_token_ownership_limit: u32,290    pub collections_admins_limit: u64,291    pub custom_data_limit: u32,292293    // Timeouts for item types in passed blocks294    pub nft_sponsor_transfer_timeout: u32,295    pub fungible_sponsor_transfer_timeout: u32,296    pub refungible_sponsor_transfer_timeout: u32,297298    // Schema limits299    pub offchain_schema_limit: u32,300    pub variable_on_chain_schema_limit: u32,301    pub const_on_chain_schema_limit: u32,302}303304pub trait WeightInfo {305	fn create_collection() -> Weight;306	fn destroy_collection() -> Weight;307	fn add_to_white_list() -> Weight;308	fn remove_from_white_list() -> Weight;309    fn set_public_access_mode() -> Weight;310    fn set_mint_permission() -> Weight;311    fn change_collection_owner() -> Weight;312    fn add_collection_admin() -> Weight;313    fn remove_collection_admin() -> Weight;314    fn set_collection_sponsor() -> Weight;315    fn confirm_sponsorship() -> Weight;316    fn remove_collection_sponsor() -> Weight;317    fn create_item(s: usize) -> Weight;318    fn burn_item() -> Weight;319    fn transfer() -> Weight;320    fn approve() -> Weight;321    fn transfer_from() -> Weight;322    fn set_offchain_schema() -> Weight;323    fn set_const_on_chain_schema() -> Weight;324    fn set_variable_on_chain_schema() -> Weight;325    fn set_variable_meta_data() -> Weight;326    fn enable_contract_sponsoring() -> Weight;327    fn set_schema_version() -> Weight;328    fn set_chain_limits() -> Weight;329    fn set_contract_sponsoring_rate_limit() -> Weight;330    fn set_variable_meta_data_sponsoring_rate_limit() -> Weight;331    fn toggle_contract_white_list() -> Weight;332    fn add_to_contract_white_list() -> Weight;333    fn remove_from_contract_white_list() -> Weight;334    fn set_collection_limits() -> Weight;335}336337#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]338#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]339pub struct CreateNftData {340    pub const_data: Vec<u8>,341    pub variable_data: Vec<u8>,342}343344#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]345#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]346pub struct CreateFungibleData {347    pub value: u128,348}349350#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]351#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]352pub struct CreateReFungibleData {353    pub const_data: Vec<u8>,354    pub variable_data: Vec<u8>,355    pub pieces: u128,356}357358#[derive(Encode, Decode, Debug, Clone, PartialEq)]359#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]360pub enum CreateItemData {361    NFT(CreateNftData),362    Fungible(CreateFungibleData),363    ReFungible(CreateReFungibleData),364}365366impl CreateItemData {367    pub fn len(&self) -> usize {368        let len = match self {369            CreateItemData::NFT(data) => data.variable_data.len() + data.const_data.len(),370            CreateItemData::ReFungible(data) => data.variable_data.len() + data.const_data.len(),371            _ => 0372        };373        374        return len;375    }376}377378impl From<CreateNftData> for CreateItemData {379    fn from(item: CreateNftData) -> Self {380        CreateItemData::NFT(item)381    }382}383384impl From<CreateReFungibleData> for CreateItemData {385    fn from(item: CreateReFungibleData) -> Self {386        CreateItemData::ReFungible(item)387    }388}389390impl From<CreateFungibleData> for CreateItemData {391    fn from(item: CreateFungibleData) -> Self {392        CreateItemData::Fungible(item)393    }394}395396397decl_error! {398	/// Error for non-fungible-token module.399	pub enum Error for Module<T: Config> {400        /// Total collections bound exceeded.401        TotalCollectionsLimitExceeded,402		/// Decimal_points parameter must be lower than MAX_DECIMAL_POINTS constant, currently it is 30.403        CollectionDecimalPointLimitExceeded, 404        /// Collection name can not be longer than 63 char.405        CollectionNameLimitExceeded, 406        /// Collection description can not be longer than 255 char.407        CollectionDescriptionLimitExceeded, 408        /// Token prefix can not be longer than 15 char.409        CollectionTokenPrefixLimitExceeded,410        /// This collection does not exist.411        CollectionNotFound,412        /// Item not exists.413        TokenNotFound,414        /// Admin not found415        AdminNotFound,416        /// Arithmetic calculation overflow.417        NumOverflow,       418        /// Account already has admin role.419        AlreadyAdmin,  420        /// You do not own this collection.421        NoPermission,422        /// This address is not set as sponsor, use setCollectionSponsor first.423        ConfirmUnsetSponsorFail,424        /// Collection is not in mint mode.425        PublicMintingNotAllowed,426        /// Sender parameter and item owner must be equal.427        MustBeTokenOwner,428        /// Item balance not enough.429        TokenValueTooLow,430        /// Size of item is too large.431        NftSizeLimitExceeded,432        /// No approve found433        ApproveNotFound,434        /// Requested value more than approved.435        TokenValueNotEnough,436        /// Only approved addresses can call this method.437        ApproveRequired,438        /// Address is not in white list.439        AddresNotInWhiteList,440        /// Number of collection admins bound exceeded.441        CollectionAdminsLimitExceeded,442        /// Owned tokens by a single address bound exceeded.443        AddressOwnershipLimitExceeded,444        /// Length of items properties must be greater than 0.445        EmptyArgument,446        /// const_data exceeded data limit.447        TokenConstDataLimitExceeded,448        /// variable_data exceeded data limit.449        TokenVariableDataLimitExceeded,450        /// Not NFT item data used to mint in NFT collection.451        NotNftDataUsedToMintNftCollectionToken,452        /// Not Fungible item data used to mint in Fungible collection.453        NotFungibleDataUsedToMintFungibleCollectionToken,454        /// Not Re Fungible item data used to mint in Re Fungible collection.455        NotReFungibleDataUsedToMintReFungibleCollectionToken,456        /// Unexpected collection type.457        UnexpectedCollectionType,458        /// Can't store metadata in fungible tokens.459        CantStoreMetadataInFungibleTokens,460        /// Collection token limit exceeded461        CollectionTokenLimitExceeded,462        /// Account token limit exceeded per collection463        AccountTokenLimitExceeded,464        /// Collection limit bounds per collection exceeded465        CollectionLimitBoundsExceeded,466        /// Tried to enable permissions which are only permitted to be disabled467        OwnerPermissionsCantBeReverted,468        /// Schema data size limit bound exceeded469        SchemaDataLimitExceeded,470        /// Maximum refungibility exceeded471        WrongRefungiblePieces,472        /// createRefungible should be called with one owner473        BadCreateRefungibleCall,474	}475}476477pub trait Config: system::Config + Sized + pallet_transaction_payment::Config + pallet_contracts::Config {478    type Event: From<Event<Self>> + Into<<Self as system::Config>::Event>;479480    /// Weight information for extrinsics in this pallet.481	type WeightInfo: WeightInfo;482483    type EvmAddressMapping: pallet_evm::AddressMapping<Self::AccountId>;484    type EvmBackwardsAddressMapping: EvmBackwardsAddressMapping<Self::AccountId>;485    type EvmWithdrawOrigin: pallet_evm::EnsureAddressOrigin<Self::Origin, Success = Self::AccountId>;486487	type CrossAccountId: CrossAccountId<Self::AccountId>;488    type Currency: Currency<Self::AccountId>;489    type CollectionCreationPrice: Get<<<Self as Config>::Currency as Currency<Self::AccountId>>::Balance>;490    type TreasuryAccountId: Get<Self::AccountId>;491492    type EthereumChainId: Get<u64>;493    type EthereumTransactionSender: pallet_ethereum::EthereumTransactionSender;494}495496#[cfg(feature = "runtime-benchmarks")]497mod benchmarking;498499// #endregion500501// # Used definitions502//503// ## User control levels504//505// chain-controlled - key is uncontrolled by user506//                    i.e autoincrementing index507//                    can use non-cryptographic hash508// real - key is controlled by user509//        but it is hard to generate enough colliding values, i.e owner of signed txs510//        can use non-cryptographic hash511// controlled - key is completly controlled by users512//              i.e maps with mutable keys513//              should use cryptographic hash514//515// ## User control level downgrade reasons516//517// ?1 - chain-controlled -> controlled518//      collections/tokens can be destroyed, resulting in massive holes519// ?2 - chain-controlled -> controlled520//      same as ?1, but can be only added, resulting in easier exploitation521// ?3 - real -> controlled522//      no confirmation required, so addresses can be easily generated523decl_storage! {524    trait Store for Module<T: Config> as Nft {525526        //#region Private members527        /// Id of next collection528        CreatedCollectionCount: u32;529        /// Used for migrations530        ChainVersion: u64;531        /// Id of last collection token532        /// Collection id (controlled?1)533        ItemListIndex: map hasher(blake2_128_concat) CollectionId => TokenId;534        //#endregion535536        //#region Chain limits struct537        pub ChainLimit get(fn chain_limit) config(): ChainLimits;538        //#endregion539540        //#region Bound counters541        /// Amount of collections destroyed, used for total amount tracking with542        /// CreatedCollectionCount543        DestroyedCollectionCount: u32;544        /// Total amount of account owned tokens (NFTs + RFTs + unique fungibles)545        /// Account id (real)546        pub AccountItemCount get(fn account_item_count): map hasher(twox_64_concat) T::AccountId => u32;547        //#endregion548549        //#region Basic collections550        /// Collection info551        /// Collection id (controlled?1)552        pub CollectionById get(fn collection_id) config(): map hasher(blake2_128_concat) CollectionId => Option<Collection<T>> = None;553        /// List of collection admins554        /// Collection id (controlled?2)555        pub AdminList get(fn admin_list_collection): map hasher(blake2_128_concat) CollectionId => Vec<T::CrossAccountId>;556        /// Whitelisted collection users557        /// Collection id (controlled?2), user id (controlled?3)558        pub WhiteList get(fn white_list): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) T::AccountId => bool;559        //#endregion560561        /// How many of collection items user have562        /// Collection id (controlled?2), account id (real)563        pub Balance get(fn balance_count): double_map hasher(blake2_128_concat) CollectionId, hasher(twox_64_concat) T::AccountId => u128;564565        /// Amount of items which spender can transfer out of owners account (via transferFrom)566        /// Collection id (controlled?2), (token id (controlled ?2) + owner account id (real) + spender account id (controlled?3))567        /// TODO: Off chain worker should remove from this map when token gets removed568        pub Allowances get(fn approved): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) (TokenId, T::AccountId, T::AccountId) => u128;569570        //#region Item collections571        /// Collection id (controlled?2), token id (controlled?1)572        pub NftItemList get(fn nft_item_id) config(): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => Option<NftItemType<T::CrossAccountId>>;573        /// Collection id (controlled?2), owner (controlled?2)574        pub FungibleItemList get(fn fungible_item_id) config(): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) T::AccountId => FungibleItemType;575        /// Collection id (controlled?2), token id (controlled?1)576        pub ReFungibleItemList get(fn refungible_item_id) config(): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => Option<ReFungibleItemType<T::CrossAccountId>>;577        //#endregion578579        //#region Index list580        /// Collection id (controlled?2), tokens owner (controlled?2)581        pub AddressTokens get(fn address_tokens): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) T::AccountId => Vec<TokenId>;582        //#endregion583584        //#region Tokens transfer rate limit baskets585        /// (Collection id (controlled?2), who created (real))586        /// TODO: Off chain worker should remove from this map when collection gets removed587        pub CreateItemBasket get(fn create_item_basket): map hasher(blake2_128_concat) (CollectionId, T::AccountId) => T::BlockNumber;588        /// Collection id (controlled?2), token id (controlled?2)589        pub NftTransferBasket get(fn nft_transfer_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => T::BlockNumber;590        /// Collection id (controlled?2), owning user (real)591        pub FungibleTransferBasket get(fn fungible_transfer_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(twox_64_concat) T::AccountId => T::BlockNumber;592        /// Collection id (controlled?2), token id (controlled?2)593        pub ReFungibleTransferBasket get(fn refungible_transfer_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => T::BlockNumber;594        //#endregion595596        /// Variable metadata sponsoring597        /// Collection id (controlled?2), token id (controlled?2)598        pub VariableMetaDataBasket get(fn variable_meta_data_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => Option<T::BlockNumber> = None;599      600        //#region Contract Sponsorship and Ownership601        /// Contract address (real)602        pub ContractOwner get(fn contract_owner): map hasher(twox_64_concat) T::AccountId => Option<T::AccountId>;603        /// Contract address (real)604        pub ContractSelfSponsoring get(fn contract_self_sponsoring): map hasher(twox_64_concat) T::AccountId => bool;605        /// (Contract address(real), caller (real))606        pub ContractSponsorBasket get(fn contract_sponsor_basket): map hasher(twox_64_concat) (T::AccountId, T::AccountId) => T::BlockNumber;607        /// Contract address (real)608        pub ContractSponsoringRateLimit get(fn contract_sponsoring_rate_limit): map hasher(twox_64_concat) T::AccountId => T::BlockNumber;609        /// Contract address (real)610        pub ContractWhiteListEnabled get(fn contract_white_list_enabled): map hasher(twox_64_concat) T::AccountId => bool; 611        /// Contract address (real) => Whitelisted user (controlled?3)612        pub ContractWhiteList get(fn contract_white_list): double_map hasher(twox_64_concat) T::AccountId, hasher(blake2_128_concat) T::AccountId => bool; 613        //#endregion614    }615    add_extra_genesis {616        build(|config: &GenesisConfig<T>| {617            // Modification of storage618            for (_num, _c) in &config.collection_id {619                <Module<T>>::init_collection(_c);620            }621622            for (_num, _c, _i) in &config.nft_item_id {623                <Module<T>>::init_nft_token(*_c, _i);624            }625626            for (collection_id, account_id, fungible_item) in &config.fungible_item_id {627                <Module<T>>::init_fungible_token(*collection_id, &T::CrossAccountId::from_sub(account_id.clone()), fungible_item);628            }629630            for (_num, _c, _i) in &config.refungible_item_id {631                <Module<T>>::init_refungible_token(*_c, _i);632            }633        })634    }635}636637decl_event!(638    pub enum Event<T>639    where640        CrossAccountId = <T as Config>::CrossAccountId,641    {642        /// New collection was created643        /// 644        /// # Arguments645        /// 646        /// * collection_id: Globally unique identifier of newly created collection.647        /// 648        /// * mode: [CollectionMode] converted into u8.649        /// 650        /// * account_id: Collection owner.651        CollectionCreated(CollectionId, u8, CrossAccountId),652653        /// New item was created.654        /// 655        /// # Arguments656        /// 657        /// * collection_id: Id of the collection where item was created.658        /// 659        /// * item_id: Id of an item. Unique within the collection.660        ///661        /// * recipient: Owner of newly created item 662        ItemCreated(CollectionId, TokenId, CrossAccountId),663664        /// Collection item was burned.665        /// 666        /// # Arguments667        /// 668        /// collection_id.669        /// 670        /// item_id: Identifier of burned NFT.671        ItemDestroyed(CollectionId, TokenId),672673        /// Item was transferred674        ///675        /// * collection_id: Id of collection to which item is belong676        ///677        /// * item_id: Id of an item678        ///679        /// * sender: Original owner of item680        ///681        /// * recipient: New owner of item682        ///683        /// * amount: Always 1 for NFT684        Transfer(CollectionId, TokenId, CrossAccountId, CrossAccountId, u128),685686        /// * collection_id687        ///688        /// * item_id689        ///690        /// * sender691        ///692        /// * spender693        ///694        /// * amount695        Approved(CollectionId, TokenId, CrossAccountId, CrossAccountId, u128),696    }697);698699decl_module! {700    pub struct Module<T: Config> for enum Call 701    where 702        origin: T::Origin703    {704        fn deposit_event() = default;705        type Error = Error<T>;706707        fn on_initialize(now: T::BlockNumber) -> Weight {708            0709        }710711        /// 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.712        /// 713        /// # Permissions714        /// 715        /// * Anyone.716        /// 717        /// # Arguments718        /// 719        /// * collection_name: UTF-16 string with collection name (limit 64 characters), will be stored as zero-terminated.720        /// 721        /// * collection_description: UTF-16 string with collection description (limit 256 characters), will be stored as zero-terminated.722        /// 723        /// * token_prefix: UTF-8 string with token prefix.724        /// 725        /// * mode: [CollectionMode] collection type and type dependent data.726        // returns collection ID727        #[weight = <T as Config>::WeightInfo::create_collection()]728        #[transactional]729        pub fn create_collection(origin,730                                 collection_name: Vec<u16>,731                                 collection_description: Vec<u16>,732                                 token_prefix: Vec<u8>,733                                 mode: CollectionMode) -> DispatchResult {734735            // Anyone can create a collection736            let who = T::CrossAccountId::from_sub(ensure_signed(origin)?);737738            // Take a (non-refundable) deposit of collection creation739            let mut imbalance = <<<T as Config>::Currency as Currency<T::AccountId>>::PositiveImbalance>::zero();740            imbalance.subsume(<<T as Config>::Currency as Currency<T::AccountId>>::deposit_creating(741                &T::TreasuryAccountId::get(),742                T::CollectionCreationPrice::get(),743            ));744            <T as Config>::Currency::settle(745                who.as_sub(),746                imbalance,747                WithdrawReasons::TRANSFER,748                ExistenceRequirement::KeepAlive,749            ).map_err(|_| Error::<T>::NoPermission)?;750751            let decimal_points = match mode {752                CollectionMode::Fungible(points) => points,753                _ => 0754            };755756            let chain_limit = ChainLimit::get();757758            let created_count = CreatedCollectionCount::get();759            let destroyed_count = DestroyedCollectionCount::get();760761            // bound Total number of collections762            ensure!(created_count - destroyed_count < chain_limit.collection_numbers_limit, Error::<T>::TotalCollectionsLimitExceeded);763764            // check params765            ensure!(decimal_points <= MAX_DECIMAL_POINTS, Error::<T>::CollectionDecimalPointLimitExceeded);766            ensure!(collection_name.len() <= 64, Error::<T>::CollectionNameLimitExceeded);767            ensure!(collection_description.len() <= 256, Error::<T>::CollectionDescriptionLimitExceeded);768            ensure!(token_prefix.len() <= 16, Error::<T>::CollectionTokenPrefixLimitExceeded);769770            // Generate next collection ID771            let next_id = created_count772                .checked_add(1)773                .ok_or(Error::<T>::NumOverflow)?;774775            CreatedCollectionCount::put(next_id);776777            let limits = CollectionLimits {778                sponsored_data_size: chain_limit.custom_data_limit,779                ..Default::default()780            };781782            // Create new collection783            let new_collection = Collection {784                owner: who.clone(),785                name: collection_name,786                mode: mode.clone(),787                mint_mode: false,788                access: AccessMode::Normal,789                description: collection_description,790                decimal_points: decimal_points,791                token_prefix: token_prefix,792                offchain_schema: Vec::new(),793                schema_version: SchemaVersion::ImageURL,794                sponsorship: SponsorshipState::Disabled,795                variable_on_chain_schema: Vec::new(),796                const_on_chain_schema: Vec::new(),797                limits,798            };799800            // Add new collection to map801            <CollectionById<T>>::insert(next_id, new_collection);802803            // call event804            Self::deposit_event(RawEvent::CollectionCreated(next_id, mode.into(), who));805806            Ok(())807        }808809        /// **DANGEROUS**: Destroys collection and all NFTs within this collection. Users irrecoverably lose their assets and may lose real money.810        /// 811        /// # Permissions812        /// 813        /// * Collection Owner.814        /// 815        /// # Arguments816        /// 817        /// * collection_id: collection to destroy.818        #[weight = <T as Config>::WeightInfo::destroy_collection()]819        #[transactional]820        pub fn destroy_collection(origin, collection_id: CollectionId) -> DispatchResult {821822            let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);823            let collection = Self::get_collection(collection_id)?;824            Self::check_owner_permissions(&collection, &sender)?;825            if !collection.limits.owner_can_destroy {826                fail!(Error::<T>::NoPermission);827            }828829            <AddressTokens<T>>::remove_prefix(collection_id);830            <Allowances<T>>::remove_prefix(collection_id);831            <Balance<T>>::remove_prefix(collection_id);832            <ItemListIndex>::remove(collection_id);833            <AdminList<T>>::remove(collection_id);834            <CollectionById<T>>::remove(collection_id);835            <WhiteList<T>>::remove_prefix(collection_id);836837            <NftItemList<T>>::remove_prefix(collection_id);838            <FungibleItemList<T>>::remove_prefix(collection_id);839            <ReFungibleItemList<T>>::remove_prefix(collection_id);840841            <NftTransferBasket<T>>::remove_prefix(collection_id);842            <FungibleTransferBasket<T>>::remove_prefix(collection_id);843            <ReFungibleTransferBasket<T>>::remove_prefix(collection_id);844845            <VariableMetaDataBasket<T>>::remove_prefix(collection_id);846847            DestroyedCollectionCount::put(DestroyedCollectionCount::get()848                .checked_add(1)849                .ok_or(Error::<T>::NumOverflow)?);850851            Ok(())852        }853854        /// Add an address to white list.855        /// 856        /// # Permissions857        /// 858        /// * Collection Owner859        /// * Collection Admin860        /// 861        /// # Arguments862        /// 863        /// * collection_id.864        /// 865        /// * address.866        #[weight = <T as Config>::WeightInfo::add_to_white_list()]867        #[transactional]868        pub fn add_to_white_list(origin, collection_id: CollectionId, address: T::CrossAccountId) -> DispatchResult{869870            let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);871            let collection = Self::get_collection(collection_id)?;872            Self::check_owner_or_admin_permissions(&collection, &sender)?;873874            <WhiteList<T>>::insert(collection_id, address.as_sub(), true);875            876            Ok(())877        }878879        /// Remove an address from white list.880        /// 881        /// # Permissions882        /// 883        /// * Collection Owner884        /// * Collection Admin885        /// 886        /// # Arguments887        /// 888        /// * collection_id.889        /// 890        /// * address.891        #[weight = <T as Config>::WeightInfo::remove_from_white_list()]892        #[transactional]893        pub fn remove_from_white_list(origin, collection_id: CollectionId, address: T::CrossAccountId) -> DispatchResult{894895            let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);896            let collection = Self::get_collection(collection_id)?;897            Self::check_owner_or_admin_permissions(&collection, &sender)?;898899            <WhiteList<T>>::remove(collection_id, address.as_sub());900901            Ok(())902        }903904        /// Toggle between normal and white list access for the methods with access for `Anyone`.905        /// 906        /// # Permissions907        /// 908        /// * Collection Owner.909        /// 910        /// # Arguments911        /// 912        /// * collection_id.913        /// 914        /// * mode: [AccessMode]915        #[weight = <T as Config>::WeightInfo::set_public_access_mode()]916        #[transactional]917        pub fn set_public_access_mode(origin, collection_id: CollectionId, mode: AccessMode) -> DispatchResult918        {919            let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);920921            let mut target_collection = Self::get_collection(collection_id)?;922            Self::check_owner_permissions(&target_collection, &sender)?;923            target_collection.access = mode;924            Self::save_collection(target_collection);925926            Ok(())927        }928929        /// Allows Anyone to create tokens if:930        /// * White List is enabled, and931        /// * Address is added to white list, and932        /// * This method was called with True parameter933        /// 934        /// # Permissions935        /// * Collection Owner936        ///937        /// # Arguments938        /// 939        /// * collection_id.940        /// 941        /// * mint_permission: Boolean parameter. If True, allows minting to Anyone with conditions above.942        #[weight = <T as Config>::WeightInfo::set_mint_permission()]943        #[transactional]944        pub fn set_mint_permission(origin, collection_id: CollectionId, mint_permission: bool) -> DispatchResult945        {946            let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);947948            let mut target_collection = Self::get_collection(collection_id)?;949            Self::check_owner_permissions(&target_collection, &sender)?;950            target_collection.mint_mode = mint_permission;951            Self::save_collection(target_collection);952953            Ok(())954        }955956        /// Change the owner of the collection.957        /// 958        /// # Permissions959        /// 960        /// * Collection Owner.961        /// 962        /// # Arguments963        /// 964        /// * collection_id.965        /// 966        /// * new_owner.967        #[weight = <T as Config>::WeightInfo::change_collection_owner()]968        #[transactional]969        pub fn change_collection_owner(origin, collection_id: CollectionId, new_owner: T::CrossAccountId) -> DispatchResult {970971            let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);972            let mut target_collection = Self::get_collection(collection_id)?;973            Self::check_owner_permissions(&target_collection, &sender)?;974            target_collection.owner = new_owner;975            Self::save_collection(target_collection);976977            Ok(())978        }979980        /// Adds an admin of the Collection.981        /// 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. 982        /// 983        /// # Permissions984        /// 985        /// * Collection Owner.986        /// * Collection Admin.987        /// 988        /// # Arguments989        /// 990        /// * collection_id: ID of the Collection to add admin for.991        /// 992        /// * new_admin_id: Address of new admin to add.993        #[weight = <T as Config>::WeightInfo::add_collection_admin()]994        #[transactional]995        pub fn add_collection_admin(origin, collection_id: CollectionId, new_admin_id: T::CrossAccountId) -> DispatchResult {996            let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);997            let collection = Self::get_collection(collection_id)?;998            Self::check_owner_or_admin_permissions(&collection, &sender)?;999            let mut admin_arr = <AdminList<T>>::get(collection_id);10001001            match admin_arr.binary_search(&new_admin_id) {1002                Ok(_) => {},1003                Err(idx) => {1004                    let limits = ChainLimit::get();1005                    ensure!(admin_arr.len() < limits.collections_admins_limit as usize, Error::<T>::CollectionAdminsLimitExceeded);1006                    admin_arr.insert(idx, new_admin_id);1007                    <AdminList<T>>::insert(collection_id, admin_arr);1008                }1009            }1010            Ok(())1011        }10121013        /// 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.1014        ///1015        /// # Permissions1016        /// 1017        /// * Collection Owner.1018        /// * Collection Admin.1019        /// 1020        /// # Arguments1021        /// 1022        /// * collection_id: ID of the Collection to remove admin for.1023        /// 1024        /// * account_id: Address of admin to remove.1025        #[weight = <T as Config>::WeightInfo::remove_collection_admin()]1026        #[transactional]1027        pub fn remove_collection_admin(origin, collection_id: CollectionId, account_id: T::CrossAccountId) -> DispatchResult {1028            let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);1029            let collection = Self::get_collection(collection_id)?;1030            Self::check_owner_or_admin_permissions(&collection, &sender)?;1031            let mut admin_arr = <AdminList<T>>::get(collection_id);10321033            match admin_arr.binary_search(&account_id) {1034                Ok(idx) => {1035                    admin_arr.remove(idx);1036                    <AdminList<T>>::insert(collection_id, admin_arr);1037                },1038                Err(_) => {}1039            }1040            Ok(())1041        }10421043        /// # Permissions1044        /// 1045        /// * Collection Owner1046        /// 1047        /// # Arguments1048        /// 1049        /// * collection_id.1050        /// 1051        /// * new_sponsor.1052        #[weight = <T as Config>::WeightInfo::set_collection_sponsor()]1053        #[transactional]1054        pub fn set_collection_sponsor(origin, collection_id: CollectionId, new_sponsor: T::AccountId) -> DispatchResult {1055            let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);1056            let mut target_collection = Self::get_collection(collection_id)?;1057            Self::check_owner_permissions(&target_collection, &sender)?;10581059            target_collection.sponsorship = SponsorshipState::Unconfirmed(new_sponsor);1060            Self::save_collection(target_collection);10611062            Ok(())1063        }10641065        /// # Permissions1066        /// 1067        /// * Sponsor.1068        /// 1069        /// # Arguments1070        /// 1071        /// * collection_id.1072        #[weight = <T as Config>::WeightInfo::confirm_sponsorship()]1073        #[transactional]1074        pub fn confirm_sponsorship(origin, collection_id: CollectionId) -> DispatchResult {1075            let sender = ensure_signed(origin)?;10761077            let mut target_collection = Self::get_collection(collection_id)?;1078            ensure!(1079                target_collection.sponsorship.pending_sponsor() == Some(&sender),1080                Error::<T>::ConfirmUnsetSponsorFail1081            );10821083            target_collection.sponsorship = SponsorshipState::Confirmed(sender);1084            Self::save_collection(target_collection);10851086            Ok(())1087        }10881089        /// Switch back to pay-per-own-transaction model.1090        ///1091        /// # Permissions1092        ///1093        /// * Collection owner.1094        /// 1095        /// # Arguments1096        /// 1097        /// * collection_id.1098        #[weight = <T as Config>::WeightInfo::remove_collection_sponsor()]1099        #[transactional]1100        pub fn remove_collection_sponsor(origin, collection_id: CollectionId) -> DispatchResult {1101            let sender = ensure_signed(origin)?;11021103            let mut target_collection = Self::get_collection(collection_id)?;1104            Self::check_owner_permissions(&target_collection, &T::CrossAccountId::from_sub(sender))?;11051106            target_collection.sponsorship = SponsorshipState::Disabled;1107            Self::save_collection(target_collection);11081109            Ok(())1110        }11111112        /// This method creates a concrete instance of NFT Collection created with CreateCollection method.1113        /// 1114        /// # Permissions1115        /// 1116        /// * Collection Owner.1117        /// * Collection Admin.1118        /// * Anyone if1119        ///     * White List is enabled, and1120        ///     * Address is added to white list, and1121        ///     * MintPermission is enabled (see SetMintPermission method)1122        /// 1123        /// # Arguments1124        /// 1125        /// * collection_id: ID of the collection.1126        /// 1127        /// * owner: Address, initial owner of the NFT.1128        ///1129        /// * data: Token data to store on chain.1130        // #[weight =1131        // (130_000_000 as Weight)1132        // .saturating_add((2135 as Weight).saturating_mul((properties.len() as u64) as Weight))1133        // .saturating_add(RocksDbWeight::get().reads(10 as Weight))1134        // .saturating_add(RocksDbWeight::get().writes(8 as Weight))]11351136        #[weight = <T as Config>::WeightInfo::create_item(data.len())]1137        #[transactional]1138        pub fn create_item(origin, collection_id: CollectionId, owner: T::CrossAccountId, data: CreateItemData) -> DispatchResult {11391140            let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);11411142            let target_collection = Self::get_collection(collection_id)?;11431144            Self::can_create_items_in_collection(&target_collection, &sender, &owner, 1)?;1145            Self::validate_create_item_args(&target_collection, &data)?;1146            Self::create_item_no_validation(&target_collection, owner, data)?;11471148            Self::submit_logs(target_collection)?;1149            Ok(())1150        }11511152        /// This method creates multiple items in a collection created with CreateCollection method.1153        /// 1154        /// # Permissions1155        /// 1156        /// * Collection Owner.1157        /// * Collection Admin.1158        /// * Anyone if1159        ///     * White List is enabled, and1160        ///     * Address is added to white list, and1161        ///     * MintPermission is enabled (see SetMintPermission method)1162        /// 1163        /// # Arguments1164        /// 1165        /// * collection_id: ID of the collection.1166        /// 1167        /// * itemsData: Array items properties. Each property is an array of bytes itself, see [create_item].1168        /// 1169        /// * owner: Address, initial owner of the NFT.1170        #[weight = <T as Config>::WeightInfo::create_item(items_data.into_iter()1171                               .map(|data| { data.len() })1172                               .sum())]1173        #[transactional]1174        pub fn create_multiple_items(origin, collection_id: CollectionId, owner: T::CrossAccountId, items_data: Vec<CreateItemData>) -> DispatchResult {11751176            ensure!(items_data.len() > 0, Error::<T>::EmptyArgument);1177            let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);1178            let collection = Self::get_collection(collection_id)?;11791180            Self::create_multiple_items_internal(sender, &collection, owner, items_data)?;11811182            Self::submit_logs(collection)?;1183            Ok(())1184        }11851186        /// Destroys a concrete instance of NFT.1187        /// 1188        /// # Permissions1189        /// 1190        /// * Collection Owner.1191        /// * Collection Admin.1192        /// * Current NFT Owner.1193        /// 1194        /// # Arguments1195        /// 1196        /// * collection_id: ID of the collection.1197        /// 1198        /// * item_id: ID of NFT to burn.1199        #[weight = <T as Config>::WeightInfo::burn_item()]1200        #[transactional]1201        pub fn burn_item(origin, collection_id: CollectionId, item_id: TokenId, value: u128) -> DispatchResult {12021203            let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);1204            let target_collection = Self::get_collection(collection_id)?;12051206            Self::burn_item_internal(&sender, &target_collection, item_id, value)?;12071208            Self::submit_logs(target_collection)?;1209            Ok(())1210        }12111212        /// Change ownership of the token.1213        /// 1214        /// # Permissions1215        /// 1216        /// * Collection Owner1217        /// * Collection Admin1218        /// * Current NFT owner1219        ///1220        /// # Arguments1221        /// 1222        /// * recipient: Address of token recipient.1223        /// 1224        /// * collection_id.1225        /// 1226        /// * item_id: ID of the item1227        ///     * Non-Fungible Mode: Required.1228        ///     * Fungible Mode: Ignored.1229        ///     * Re-Fungible Mode: Required.1230        /// 1231        /// * value: Amount to transfer.1232        ///     * Non-Fungible Mode: Ignored1233        ///     * Fungible Mode: Must specify transferred amount1234        ///     * Re-Fungible Mode: Must specify transferred portion (between 0 and 1)1235        #[weight = <T as Config>::WeightInfo::transfer()]1236        #[transactional]1237        pub fn transfer(origin, recipient: T::CrossAccountId, collection_id: CollectionId, item_id: TokenId, value: u128) -> DispatchResult {1238            let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);1239            let collection = Self::get_collection(collection_id)?;12401241            Self::transfer_internal(sender, recipient, &collection, item_id, value)?;12421243            Self::submit_logs(collection)?;1244            Ok(())1245        }12461247        /// Set, change, or remove approved address to transfer the ownership of the NFT.1248        /// 1249        /// # Permissions1250        /// 1251        /// * Collection Owner1252        /// * Collection Admin1253        /// * Current NFT owner1254        /// 1255        /// # Arguments1256        /// 1257        /// * approved: Address that is approved to transfer this NFT or zero (if needed to remove approval).1258        /// 1259        /// * collection_id.1260        /// 1261        /// * item_id: ID of the item.1262        #[weight = <T as Config>::WeightInfo::approve()]1263        #[transactional]1264        pub fn approve(origin, spender: T::CrossAccountId, collection_id: CollectionId, item_id: TokenId, amount: u128) -> DispatchResult {12651266            let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);1267            let collection = Self::get_collection(collection_id)?;12681269            Self::approve_internal(sender, spender, &collection, item_id, amount)?;12701271            Self::submit_logs(collection)?;1272            Ok(())1273        }1274        1275        /// 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.1276        /// 1277        /// # Permissions1278        /// * Collection Owner1279        /// * Collection Admin1280        /// * Current NFT owner1281        /// * Address approved by current NFT owner1282        /// 1283        /// # Arguments1284        /// 1285        /// * from: Address that owns token.1286        /// 1287        /// * recipient: Address of token recipient.1288        /// 1289        /// * collection_id.1290        /// 1291        /// * item_id: ID of the item.1292        /// 1293        /// * value: Amount to transfer.1294        #[weight = <T as Config>::WeightInfo::transfer_from()]1295        #[transactional]1296        pub fn transfer_from(origin, from: T::CrossAccountId, recipient: T::CrossAccountId, collection_id: CollectionId, item_id: TokenId, value: u128 ) -> DispatchResult {12971298            let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);1299            let collection = Self::get_collection(collection_id)?;13001301            Self::transfer_from_internal(sender, from, recipient, &collection, item_id, value)?;13021303            Self::submit_logs(collection)?;1304            Ok(())1305        }13061307        // #[weight = 0]1308        // pub fn safe_transfer_from(origin, collection_id: CollectionId, item_id: TokenId, new_owner: T::AccountId) -> DispatchResult {13091310        //     // let no_perm_mes = "You do not have permissions to modify this collection";1311        //     // ensure!(<ApprovedList<T>>::contains_key((collection_id, item_id)), no_perm_mes);1312        //     // let list_itm = <ApprovedList<T>>::get((collection_id, item_id));1313        //     // ensure!(list_itm.contains(&new_owner.clone()), no_perm_mes);13141315        //     // // on_nft_received  call13161317        //     // Self::transfer(origin, collection_id, item_id, new_owner)?;13181319        //     Ok(())1320        // }13211322        /// Set off-chain data schema.1323        /// 1324        /// # Permissions1325        /// 1326        /// * Collection Owner1327        /// * Collection Admin1328        /// 1329        /// # Arguments1330        /// 1331        /// * collection_id.1332        /// 1333        /// * schema: String representing the offchain data schema.1334        #[weight = <T as Config>::WeightInfo::set_variable_meta_data()]1335        #[transactional]1336        pub fn set_variable_meta_data (1337            origin,1338            collection_id: CollectionId,1339            item_id: TokenId,1340            data: Vec<u8>1341        ) -> DispatchResult {1342            let sender = ensure_signed(origin)?;1343            1344            let target_collection = Self::get_collection(collection_id)?;1345            Self::token_exists(&target_collection, item_id)?;13461347            ensure!(ChainLimit::get().custom_data_limit >= data.len() as u32, Error::<T>::TokenVariableDataLimitExceeded);13481349            // Modify permissions check1350            ensure!(Self::is_item_owner(sender.clone(), &target_collection, item_id) ||1351                Self::is_owner_or_admin_permissions(&target_collection, sender.clone()),1352                Error::<T>::NoPermission);13531354            match target_collection.mode1355            {1356                CollectionMode::NFT => Self::set_nft_variable_data(&target_collection, item_id, data)?,1357                CollectionMode::ReFungible  => Self::set_re_fungible_variable_data(&target_collection, item_id, data)?,1358                CollectionMode::Fungible(_) => fail!(Error::<T>::CantStoreMetadataInFungibleTokens),1359                _ => fail!(Error::<T>::UnexpectedCollectionType)1360            };13611362            Ok(())1363        }1364 1365        /// Set schema standard1366        /// ImageURL1367        /// Unique1368        /// 1369        /// # Permissions1370        /// 1371        /// * Collection Owner1372        /// * Collection Admin1373        /// 1374        /// # Arguments1375        /// 1376        /// * collection_id.1377        /// 1378        /// * schema: SchemaVersion: enum1379        #[weight = <T as Config>::WeightInfo::set_schema_version()]1380        #[transactional]1381        pub fn set_schema_version(1382            origin,1383            collection_id: CollectionId,1384            version: SchemaVersion1385        ) -> DispatchResult {1386            let sender = ensure_signed(origin)?;1387            let mut target_collection = Self::get_collection(collection_id)?;1388            Self::check_owner_or_admin_permissions(&target_collection, &sender)?;1389            target_collection.schema_version = version;1390            Self::save_collection(target_collection);13911392            Ok(())1393        }13941395        /// Set off-chain data schema.1396        /// 1397        /// # Permissions1398        /// 1399        /// * Collection Owner1400        /// * Collection Admin1401        /// 1402        /// # Arguments1403        /// 1404        /// * collection_id.1405        /// 1406        /// * schema: String representing the offchain data schema.1407        #[weight = <T as Config>::WeightInfo::set_offchain_schema()]1408        #[transactional]1409        pub fn set_offchain_schema(1410            origin,1411            collection_id: CollectionId,1412            schema: Vec<u8>1413        ) -> DispatchResult {1414            let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);1415            let mut target_collection = Self::get_collection(collection_id)?;1416            Self::check_owner_or_admin_permissions(&target_collection, &sender)?;14171418            // check schema limit1419            ensure!(schema.len() as u32 <= ChainLimit::get().offchain_schema_limit, "");14201421            target_collection.offchain_schema = schema;1422            Self::save_collection(target_collection);14231424            Ok(())1425        }14261427        /// Set const on-chain data schema.1428        /// 1429        /// # Permissions1430        /// 1431        /// * Collection Owner1432        /// * Collection Admin1433        /// 1434        /// # Arguments1435        /// 1436        /// * collection_id.1437        /// 1438        /// * schema: String representing the const on-chain data schema.1439        #[weight = <T as Config>::WeightInfo::set_const_on_chain_schema()]1440        #[transactional]1441        pub fn set_const_on_chain_schema (1442            origin,1443            collection_id: CollectionId,1444            schema: Vec<u8>1445        ) -> DispatchResult {1446            let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);1447            let mut target_collection = Self::get_collection(collection_id)?;1448            Self::check_owner_or_admin_permissions(&target_collection, &sender)?;14491450            // check schema limit1451            ensure!(schema.len() as u32 <= ChainLimit::get().const_on_chain_schema_limit, "");14521453            target_collection.const_on_chain_schema = schema;1454            Self::save_collection(target_collection);14551456            Ok(())1457        }14581459        /// Set variable on-chain data schema.1460        /// 1461        /// # Permissions1462        /// 1463        /// * Collection Owner1464        /// * Collection Admin1465        /// 1466        /// # Arguments1467        /// 1468        /// * collection_id.1469        /// 1470        /// * schema: String representing the variable on-chain data schema.1471        #[weight = <T as Config>::WeightInfo::set_const_on_chain_schema()]1472        #[transactional]1473        pub fn set_variable_on_chain_schema (1474            origin,1475            collection_id: CollectionId,1476            schema: Vec<u8>1477        ) -> DispatchResult {1478            let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);1479            let mut target_collection = Self::get_collection(collection_id)?;1480            Self::check_owner_or_admin_permissions(&target_collection, &sender)?;14811482            // check schema limit1483            ensure!(schema.len() as u32 <= ChainLimit::get().variable_on_chain_schema_limit, "");14841485            target_collection.variable_on_chain_schema = schema;1486            Self::save_collection(target_collection);14871488            Ok(())1489        }14901491        // Sudo permissions function1492        #[weight = <T as Config>::WeightInfo::set_chain_limits()]1493        #[transactional]1494        pub fn set_chain_limits(1495            origin,1496            limits: ChainLimits1497        ) -> DispatchResult {14981499            #[cfg(not(feature = "runtime-benchmarks"))]1500            ensure_root(origin)?;15011502            <ChainLimit>::put(limits);1503            Ok(())1504        }15051506        /// Enable smart contract self-sponsoring.1507        /// 1508        /// # Permissions1509        /// 1510        /// * Contract Owner1511        /// 1512        /// # Arguments1513        /// 1514        /// * contract address1515        /// * enable flag1516        /// 1517        #[weight = <T as Config>::WeightInfo::enable_contract_sponsoring()]1518        #[transactional]1519        pub fn enable_contract_sponsoring(1520            origin,1521            contract_address: T::AccountId,1522            enable: bool1523        ) -> DispatchResult {15241525            let sender = ensure_signed(origin)?;15261527            #[cfg(feature = "runtime-benchmarks")]1528            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());15291530            Self::ensure_contract_owned(sender, &contract_address)?;15311532            <ContractSelfSponsoring<T>>::insert(contract_address, enable);1533            Ok(())1534        }15351536        /// Set the rate limit for contract sponsoring to specified number of blocks.1537        /// 1538        /// If not set (has the default value of 0 blocks), the sponsoring will be disabled. 1539        /// If set to the number B (for blocks), the transactions will be sponsored with a rate 1540        /// limit of B, i.e. fees for every transaction sent to this smart contract will be paid 1541        /// from contract endowment if there are at least B blocks between such transactions. 1542        /// Nonetheless, if transactions are sent more frequently, the fees are paid by the sender.1543        /// 1544        /// # Permissions1545        /// 1546        /// * Contract Owner1547        /// 1548        /// # Arguments1549        /// 1550        /// -`contract_address`: Address of the contract to sponsor1551        /// -`rate_limit`: Number of blocks to wait until the next sponsored transaction is allowed1552        /// 1553        #[weight = <T as Config>::WeightInfo::set_contract_sponsoring_rate_limit()]1554        #[transactional]1555        pub fn set_contract_sponsoring_rate_limit(1556            origin,1557            contract_address: T::AccountId,1558            rate_limit: T::BlockNumber1559        ) -> DispatchResult {1560            let sender = ensure_signed(origin)?;15611562            #[cfg(feature = "runtime-benchmarks")]1563            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());15641565            Self::ensure_contract_owned(sender, &contract_address)?;1566            <ContractSponsoringRateLimit<T>>::insert(contract_address, rate_limit);1567            Ok(())1568        }15691570        /// Enable the white list for a contract. Only addresses added to the white list with addToContractWhiteList will be able to call this smart contract.1571        /// 1572        /// # Permissions1573        /// 1574        /// * Address that deployed smart contract.1575        /// 1576        /// # Arguments1577        /// 1578        /// -`contract_address`: Address of the contract.1579        /// 1580        /// - `enable`: .  1581        #[weight = <T as Config>::WeightInfo::toggle_contract_white_list()]1582        #[transactional]1583        pub fn toggle_contract_white_list(1584            origin,1585            contract_address: T::AccountId,1586            enable: bool1587        ) -> DispatchResult {1588            let sender = ensure_signed(origin)?;15891590            #[cfg(feature = "runtime-benchmarks")]1591            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());15921593            Self::ensure_contract_owned(sender, &contract_address)?;1594            if enable {1595                <ContractWhiteListEnabled<T>>::insert(contract_address, true);1596            } else {1597                <ContractWhiteListEnabled<T>>::remove(contract_address);1598            }1599            Ok(())1600        }1601        1602        /// Add an address to smart contract white list.1603        /// 1604        /// # Permissions1605        /// 1606        /// * Address that deployed smart contract.1607        /// 1608        /// # Arguments1609        /// 1610        /// -`contract_address`: Address of the contract.1611        ///1612        /// -`account_address`: Address to add.1613        #[weight = <T as Config>::WeightInfo::add_to_contract_white_list()]1614        #[transactional]1615        pub fn add_to_contract_white_list(1616            origin,1617            contract_address: T::AccountId,1618            account_address: T::AccountId1619        ) -> DispatchResult {1620            let sender = ensure_signed(origin)?;16211622            #[cfg(feature = "runtime-benchmarks")]1623            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());1624            1625            Self::ensure_contract_owned(sender, &contract_address)?;      1626            <ContractWhiteList<T>>::insert(contract_address, account_address, true);1627            Ok(())1628        }16291630        /// Remove an address from smart contract white list.1631        /// 1632        /// # Permissions1633        /// 1634        /// * Address that deployed smart contract.1635        /// 1636        /// # Arguments1637        /// 1638        /// -`contract_address`: Address of the contract.1639        ///1640        /// -`account_address`: Address to remove.1641        #[weight = <T as Config>::WeightInfo::remove_from_contract_white_list()]1642        #[transactional]1643        pub fn remove_from_contract_white_list(1644            origin,1645            contract_address: T::AccountId,1646            account_address: T::AccountId1647        ) -> DispatchResult {1648            let sender = ensure_signed(origin)?;16491650            #[cfg(feature = "runtime-benchmarks")]1651            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());16521653            Self::ensure_contract_owned(sender, &contract_address)?;1654            <ContractWhiteList<T>>::remove(contract_address, account_address);1655            Ok(())1656        }16571658        #[weight = <T as Config>::WeightInfo::set_collection_limits()]1659        #[transactional]1660        pub fn set_collection_limits(1661            origin,1662            collection_id: u32,1663            new_limits: CollectionLimits<T::BlockNumber>,1664        ) -> DispatchResult {1665            let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);1666            let mut target_collection = Self::get_collection(collection_id)?;1667            Self::check_owner_permissions(&target_collection, &sender)?;1668            let old_limits = &target_collection.limits;1669            let chain_limits = ChainLimit::get();16701671            // collection bounds1672            ensure!(new_limits.sponsor_transfer_timeout <= MAX_SPONSOR_TIMEOUT &&1673                new_limits.account_token_ownership_limit <= MAX_TOKEN_OWNERSHIP && 1674                new_limits.sponsored_data_size <= chain_limits.custom_data_limit,1675                Error::<T>::CollectionLimitBoundsExceeded);16761677            // token_limit   check  prev1678            ensure!(old_limits.token_limit >= new_limits.token_limit, Error::<T>::CollectionTokenLimitExceeded);1679            ensure!(new_limits.token_limit > 0, Error::<T>::CollectionTokenLimitExceeded);16801681            ensure!(1682                (old_limits.owner_can_transfer || !new_limits.owner_can_transfer) &&1683                (old_limits.owner_can_destroy || !new_limits.owner_can_destroy),1684                Error::<T>::OwnerPermissionsCantBeReverted,1685            );16861687            target_collection.limits = new_limits;1688            Self::save_collection(target_collection);16891690            Ok(())1691        } 1692    }1693}16941695impl<T: Config> Module<T> {16961697    pub fn transfer_internal(sender: T::CrossAccountId, recipient: T::CrossAccountId, target_collection: &CollectionHandle<T>, item_id: TokenId, value: u128) -> DispatchResult {1698        // Limits check1699        Self::is_correct_transfer(target_collection, &recipient)?;17001701        // Transfer permissions check1702        ensure!(Self::is_item_owner(&sender, target_collection, item_id) ||1703            Self::is_owner_or_admin_permissions(target_collection, &sender),1704            Error::<T>::NoPermission);17051706        if target_collection.access == AccessMode::WhiteList {1707            Self::check_white_list(target_collection, &sender)?;1708            Self::check_white_list(target_collection, &recipient)?;1709        }17101711        match target_collection.mode1712        {1713            CollectionMode::NFT => Self::transfer_nft(target_collection, item_id, sender.clone(), recipient.clone())?,1714            CollectionMode::Fungible(_)  => Self::transfer_fungible(target_collection, value, &sender, &recipient)?,1715            CollectionMode::ReFungible  => Self::transfer_refungible(target_collection, item_id, value, sender.clone(), recipient.clone())?,1716            _ => ()1717        };17181719        Self::deposit_event(RawEvent::Transfer(target_collection.id, item_id, sender, recipient, value));17201721        Ok(())1722    }17231724	pub fn approve_internal(1725		sender: T::CrossAccountId,1726		spender: T::CrossAccountId,1727		collection: &CollectionHandle<T>,1728		item_id: TokenId,1729		amount: u1281730	) -> DispatchResult {1731		Self::token_exists(&collection, item_id)?;17321733		// Transfer permissions check1734		let bypasses_limits = collection.limits.owner_can_transfer &&1735			Self::is_owner_or_admin_permissions(1736				&collection,1737				&sender,1738			);17391740		let allowance_limit = if bypasses_limits {1741			None1742		} else if let Some(amount) = Self::owned_amount(1743			&sender,1744			&collection,1745			item_id,1746		) {1747			Some(amount)1748		} else {1749			fail!(Error::<T>::NoPermission);1750		};17511752		if collection.access == AccessMode::WhiteList {1753			Self::check_white_list(&collection, &sender)?;1754			Self::check_white_list(&collection, &spender)?;1755		}17561757		let allowance: u128 = amount1758			.checked_add(<Allowances<T>>::get(collection.id, (item_id, sender.as_sub(), spender.as_sub())))1759			.ok_or(Error::<T>::NumOverflow)?;1760		if let Some(limit) = allowance_limit {1761			ensure!(limit >= allowance, Error::<T>::TokenValueTooLow);1762		}1763		<Allowances<T>>::insert(collection.id, (item_id, sender.as_sub(), spender.as_sub()), allowance);17641765		if matches!(collection.mode, CollectionMode::NFT) {1766			// TODO: NFT: only one owner may exist for token in ERC7211767			collection.log(1768				Vec::from([1769					eth::APPROVAL_NFT_TOPIC,1770					eth::address_to_topic(sender.as_eth()),1771					eth::address_to_topic(spender.as_eth()),1772				]),1773				abi_encode!(uint256(item_id.into())),1774			);1775		}17761777		if matches!(collection.mode, CollectionMode::Fungible(_)) {1778			// TODO: NFT: only one owner may exist for token in ERC201779			collection.log(1780				Vec::from([1781					eth::APPROVAL_FUNGIBLE_TOPIC,1782					eth::address_to_topic(sender.as_eth()),1783					eth::address_to_topic(spender.as_eth()),1784				]),1785				abi_encode!(uint256(allowance.into())),1786			);1787		}17881789		Self::deposit_event(RawEvent::Approved(collection.id, item_id, sender, spender, allowance));1790		Ok(())1791	}17921793	pub fn transfer_from_internal(1794		sender: T::CrossAccountId,1795		from: T::CrossAccountId,1796		recipient: T::CrossAccountId,1797		collection: &CollectionHandle<T>,1798		item_id: TokenId,1799		amount: u128,1800	) -> DispatchResult {1801		// Check approval1802		let approval: u128 = <Allowances<T>>::get(collection.id, (item_id, from.as_sub(), sender.as_sub()));18031804		// Limits check1805		Self::is_correct_transfer(&collection, &recipient)?;18061807		// Transfer permissions check1808		ensure!(1809			approval >= amount || 1810			(1811				collection.limits.owner_can_transfer &&1812				Self::is_owner_or_admin_permissions(&collection, &sender)1813			),1814			Error::<T>::NoPermission1815		);18161817		if collection.access == AccessMode::WhiteList {1818			Self::check_white_list(&collection, &sender)?;1819			Self::check_white_list(&collection, &recipient)?;1820		}18211822		// Reduce approval by transferred amount or remove if remaining approval drops to 01823		let allowance = approval.saturating_sub(amount);1824		if allowance > 0 {1825			<Allowances<T>>::insert(collection.id, (item_id, from.as_sub(), sender.as_sub()), allowance);1826		} else {1827			<Allowances<T>>::remove(collection.id, (item_id, from.as_sub(), sender.as_sub()));1828		}18291830		match collection.mode {1831			CollectionMode::NFT => {1832				Self::transfer_nft(&collection, item_id, from.clone(), recipient.clone())?1833			}1834			CollectionMode::Fungible(_) => {1835				Self::transfer_fungible(&collection, amount, &from, &recipient)?1836			}1837			CollectionMode::ReFungible => {1838				Self::transfer_refungible(&collection, item_id, amount, from.clone(), recipient.clone())?1839			}1840			_ => ()1841		};18421843		if matches!(collection.mode, CollectionMode::Fungible(_)) {1844			collection.log(1845				Vec::from([1846					eth::APPROVAL_FUNGIBLE_TOPIC,1847					eth::address_to_topic(from.as_eth()),1848					eth::address_to_topic(sender.as_eth()),1849				]),1850				abi_encode!(uint256(allowance.into())),1851			);1852		}18531854		Ok(())1855	}18561857    pub fn create_multiple_items_internal(1858        sender: T::CrossAccountId,1859        collection: &CollectionHandle<T>,1860        owner: T::CrossAccountId,1861        items_data: Vec<CreateItemData>,1862    ) -> DispatchResult {1863        Self::can_create_items_in_collection(&collection, &sender, &owner, items_data.len() as u32)?;18641865        for data in &items_data {1866            Self::validate_create_item_args(&collection, data)?;1867        }1868        for data in &items_data {1869            Self::create_item_no_validation(&collection, owner.clone(), data.clone())?;1870        }18711872        Ok(())1873    }18741875    pub fn burn_item_internal(1876        sender: &T::CrossAccountId,1877        collection: &CollectionHandle<T>,1878        item_id: TokenId,1879        value: u128,1880    ) -> DispatchResult {1881        ensure!(1882            Self::is_item_owner(&sender, &collection, item_id) ||1883            (1884                collection.limits.owner_can_transfer &&1885                Self::is_owner_or_admin_permissions(&collection, &sender)1886            ),1887            Error::<T>::NoPermission1888        );18891890        if collection.access == AccessMode::WhiteList {1891            Self::check_white_list(&collection, &sender)?;1892        }18931894        match collection.mode1895        {1896            CollectionMode::NFT => Self::burn_nft_item(&collection, item_id)?,1897            CollectionMode::Fungible(_)  => Self::burn_fungible_item(&sender, &collection, value)?,1898            CollectionMode::ReFungible  => Self::burn_refungible_item(&collection, item_id, &sender)?,1899            _ => ()1900        };19011902        Ok(())1903    }19041905    fn is_correct_transfer(collection: &CollectionHandle<T>, recipient: &T::CrossAccountId) -> DispatchResult {1906        let collection_id = collection.id;19071908        // check token limit and account token limit1909        let account_items: u32 = <AddressTokens<T>>::get(collection_id, recipient.as_sub()).len() as u32;1910        ensure!(collection.limits.account_token_ownership_limit > account_items,  Error::<T>::AccountTokenLimitExceeded);1911        1912        Ok(())1913    }19141915    fn can_create_items_in_collection(collection: &CollectionHandle<T>, sender: &T::CrossAccountId, owner: &T::CrossAccountId, amount: u32) -> DispatchResult {1916        let collection_id = collection.id;19171918        // check token limit and account token limit1919        let total_items: u32 = ItemListIndex::get(collection_id)1920            .checked_add(amount)1921            .ok_or(Error::<T>::CollectionTokenLimitExceeded)?;1922        let account_items: u32 = (<AddressTokens<T>>::get(collection_id, owner.as_sub()).len() as u32)1923            .checked_add(amount)1924            .ok_or(Error::<T>::AccountTokenLimitExceeded)?;1925        ensure!(collection.limits.token_limit >= total_items,  Error::<T>::CollectionTokenLimitExceeded);1926        ensure!(collection.limits.account_token_ownership_limit >= account_items,  Error::<T>::AccountTokenLimitExceeded);19271928        if !Self::is_owner_or_admin_permissions(collection, &sender) {1929            ensure!(collection.mint_mode == true, Error::<T>::PublicMintingNotAllowed);1930            Self::check_white_list(collection, owner)?;1931            Self::check_white_list(collection, sender)?;1932        }19331934        Ok(())1935    }19361937    fn validate_create_item_args(target_collection: &CollectionHandle<T>, data: &CreateItemData) -> DispatchResult {1938        match target_collection.mode1939        {1940            CollectionMode::NFT => {1941                if let CreateItemData::NFT(data) = data {1942                    // check sizes1943                    ensure!(ChainLimit::get().custom_data_limit >= data.const_data.len() as u32, Error::<T>::TokenConstDataLimitExceeded);1944                    ensure!(ChainLimit::get().custom_data_limit >= data.variable_data.len() as u32, Error::<T>::TokenVariableDataLimitExceeded);1945                } else {1946                    fail!(Error::<T>::NotNftDataUsedToMintNftCollectionToken);1947                }1948            },1949            CollectionMode::Fungible(_) => {1950                if let CreateItemData::Fungible(_) = data {1951                } else {1952                    fail!(Error::<T>::NotFungibleDataUsedToMintFungibleCollectionToken);1953                }1954            },1955            CollectionMode::ReFungible => {1956                if let CreateItemData::ReFungible(data) = data {19571958                    // check sizes1959                    ensure!(ChainLimit::get().custom_data_limit >= data.const_data.len() as u32, Error::<T>::TokenConstDataLimitExceeded);1960                    ensure!(ChainLimit::get().custom_data_limit >= data.variable_data.len() as u32, Error::<T>::TokenVariableDataLimitExceeded);19611962                    // Check refungibility limits1963                    ensure!(data.pieces <= MAX_REFUNGIBLE_PIECES, Error::<T>::WrongRefungiblePieces);1964                    ensure!(data.pieces > 0, Error::<T>::WrongRefungiblePieces);1965                } else {1966                    fail!(Error::<T>::NotReFungibleDataUsedToMintReFungibleCollectionToken);1967                }1968            },1969            _ => { fail!(Error::<T>::UnexpectedCollectionType); }1970        };19711972        Ok(())1973    }19741975    fn create_item_no_validation(collection: &CollectionHandle<T>, owner: T::CrossAccountId, data: CreateItemData) -> DispatchResult {1976        match data1977        {1978            CreateItemData::NFT(data) => {1979                let item = NftItemType {1980                    owner: owner.clone(),1981                    const_data: data.const_data,1982                    variable_data: data.variable_data1983                };19841985                Self::add_nft_item(collection, item)?;1986            },1987            CreateItemData::Fungible(data) => {1988                Self::add_fungible_item(collection, &owner, data.value)?;1989            },1990            CreateItemData::ReFungible(data) => {1991                let mut owner_list = Vec::new();1992                owner_list.push(Ownership {owner: owner.clone(), fraction: data.pieces});19931994                let item = ReFungibleItemType {1995                    owner: owner_list,1996                    const_data: data.const_data,1997                    variable_data: data.variable_data1998                };19992000                Self::add_refungible_item(collection, item)?;2001            }2002        };20032004        Ok(())2005    }20062007    fn add_fungible_item(collection: &CollectionHandle<T>, owner: &T::CrossAccountId, value: u128) -> DispatchResult {2008        let collection_id = collection.id;20092010        // Does new owner already have an account?2011        let balance: u128 = <FungibleItemList<T>>::get(collection_id, owner.as_sub()).value;20122013        // Mint 2014        let item = FungibleItemType {2015            value: balance.checked_add(value).ok_or(Error::<T>::NumOverflow)?,2016        };2017        <FungibleItemList<T>>::insert(collection_id, owner.as_sub(), item);20182019        // Update balance2020        let new_balance = <Balance<T>>::get(collection_id, owner.as_sub())2021            .checked_add(value)2022            .ok_or(Error::<T>::NumOverflow)?;2023        <Balance<T>>::insert(collection_id, owner.as_sub(), new_balance);20242025        Self::deposit_event(RawEvent::ItemCreated(collection_id, 0, owner.clone()));2026        Ok(())2027    }20282029    fn add_refungible_item(collection: &CollectionHandle<T>, item: ReFungibleItemType<T::CrossAccountId>) -> DispatchResult {2030        let collection_id = collection.id;20312032        let current_index = <ItemListIndex>::get(collection_id)2033            .checked_add(1)2034            .ok_or(Error::<T>::NumOverflow)?;2035        let itemcopy = item.clone();20362037        ensure!(2038            item.owner.len() == 1,2039            Error::<T>::BadCreateRefungibleCall,2040        );2041        let item_owner = item.owner.first().expect("only one owner is defined");20422043        let value = item_owner.fraction;2044        let owner = item_owner.owner.clone();20452046        Self::add_token_index(collection_id, current_index, &owner)?;20472048        <ItemListIndex>::insert(collection_id, current_index);2049        <ReFungibleItemList<T>>::insert(collection_id, current_index, itemcopy);20502051        // Update balance2052        let new_balance = <Balance<T>>::get(collection_id, owner.as_sub())2053            .checked_add(value)2054            .ok_or(Error::<T>::NumOverflow)?;2055        <Balance<T>>::insert(collection_id, owner.as_sub(), new_balance);20562057        Self::deposit_event(RawEvent::ItemCreated(collection_id, current_index, owner));2058        Ok(())2059    }20602061    fn add_nft_item(collection: &CollectionHandle<T>, item: NftItemType<T::CrossAccountId>) -> DispatchResult {2062        let collection_id = collection.id;20632064        let current_index = <ItemListIndex>::get(collection_id)2065            .checked_add(1)2066            .ok_or(Error::<T>::NumOverflow)?;20672068        let item_owner = item.owner.clone();2069        Self::add_token_index(collection_id, current_index, &item.owner)?;20702071        <ItemListIndex>::insert(collection_id, current_index);2072        <NftItemList<T>>::insert(collection_id, current_index, item);20732074        // Update balance2075        let new_balance = <Balance<T>>::get(collection_id, item_owner.as_sub())2076            .checked_add(1)2077            .ok_or(Error::<T>::NumOverflow)?;2078        <Balance<T>>::insert(collection_id, item_owner.as_sub(), new_balance);20792080        collection.log(2081            Vec::from([2082                eth::TRANSFER_NFT_TOPIC,2083                eth::address_to_topic(&H160::default()),2084                eth::address_to_topic(item_owner.as_eth()),2085            ]),2086            abi_encode!(uint256(current_index.into())),2087        );2088        Self::deposit_event(RawEvent::ItemCreated(collection_id, current_index, item_owner));2089        Ok(())2090    }20912092    fn burn_refungible_item(2093        collection: &CollectionHandle<T>,2094        item_id: TokenId,2095        owner: &T::CrossAccountId,2096    ) -> DispatchResult {2097        let collection_id = collection.id;20982099        let mut token = <ReFungibleItemList<T>>::get(collection_id, item_id)2100            .ok_or(Error::<T>::TokenNotFound)?;2101        let rft_balance = token2102            .owner2103            .iter()2104            .find(|&i| i.owner == *owner)2105            .ok_or(Error::<T>::TokenNotFound)?;2106        Self::remove_token_index(collection_id, item_id, owner)?;21072108        // update balance2109        let new_balance = <Balance<T>>::get(collection_id, rft_balance.owner.as_sub())2110            .checked_sub(rft_balance.fraction)2111            .ok_or(Error::<T>::NumOverflow)?;2112        <Balance<T>>::insert(collection_id, rft_balance.owner.as_sub(), new_balance);21132114        // Re-create owners list with sender removed2115        let index = token2116            .owner2117            .iter()2118            .position(|i| i.owner == *owner)2119            .expect("owned item is exists");2120        token.owner.remove(index);2121        let owner_count = token.owner.len();21222123        // Burn the token completely if this was the last (only) owner2124        if owner_count == 0 {2125            <ReFungibleItemList<T>>::remove(collection_id, item_id);2126            <VariableMetaDataBasket<T>>::remove(collection_id, item_id);2127        }2128        else {2129            <ReFungibleItemList<T>>::insert(collection_id, item_id, token);2130        }21312132        Ok(())2133    }21342135    fn burn_nft_item(collection: &CollectionHandle<T>, item_id: TokenId) -> DispatchResult {2136        let collection_id = collection.id;21372138        let item = <NftItemList<T>>::get(collection_id, item_id)2139            .ok_or(Error::<T>::TokenNotFound)?;2140        Self::remove_token_index(collection_id, item_id, &item.owner)?;21412142        // update balance2143        let new_balance = <Balance<T>>::get(collection_id, item.owner.as_sub())2144            .checked_sub(1)2145            .ok_or(Error::<T>::NumOverflow)?;2146        <Balance<T>>::insert(collection_id, item.owner.as_sub(), new_balance);2147        <NftItemList<T>>::remove(collection_id, item_id);2148        <VariableMetaDataBasket<T>>::remove(collection_id, item_id);21492150        Self::deposit_event(RawEvent::ItemDestroyed(collection.id, item_id));2151        Ok(())2152    }21532154    fn burn_fungible_item(owner: &T::CrossAccountId, collection: &CollectionHandle<T>, value: u128) -> DispatchResult {2155        let collection_id = collection.id;21562157        let mut balance = <FungibleItemList<T>>::get(collection_id, owner.as_sub());2158        ensure!(balance.value >= value, Error::<T>::TokenValueNotEnough);21592160        // update balance2161        let new_balance = <Balance<T>>::get(collection_id, owner.as_sub())2162            .checked_sub(value)2163            .ok_or(Error::<T>::NumOverflow)?;2164        <Balance<T>>::insert(collection_id, owner.as_sub(), new_balance);21652166        if balance.value - value > 0 {2167            balance.value -= value;2168            <FungibleItemList<T>>::insert(collection_id, owner.as_sub(), balance);2169        }2170        else {2171            <FungibleItemList<T>>::remove(collection_id, owner.as_sub());2172        }21732174        collection.log(2175            Vec::from([2176                eth::TRANSFER_FUNGIBLE_TOPIC,2177                eth::address_to_topic(owner.as_eth()),2178                eth::address_to_topic(&H160::default()),2179            ]),2180            abi_encode!(uint256(value.into())),2181        );2182        Ok(())2183    }21842185    pub fn get_collection(collection_id: CollectionId) -> Result<CollectionHandle<T>, sp_runtime::DispatchError> {2186        Ok(<CollectionHandle<T>>::get(collection_id)2187            .ok_or(Error::<T>::CollectionNotFound)?)2188    }21892190    fn save_collection(collection: CollectionHandle<T>) {2191        <CollectionById<T>>::insert(collection.id, collection.into_inner());2192    }21932194    fn submit_logs(collection: CollectionHandle<T>) -> DispatchResult {2195        T::EthereumTransactionSender::submit_logs_transaction(2196            eth::generate_transaction(collection.id, T::EthereumChainId::get()),2197            collection.logs.retrieve_logs_for_contract(eth::collection_id_to_address(collection.id)),2198        )2199    }22002201    fn check_owner_permissions(target_collection: &CollectionHandle<T>, subject: &T::CrossAccountId) -> DispatchResult {2202        ensure!(2203            *subject == target_collection.owner,2204            Error::<T>::NoPermission2205        );22062207        Ok(())2208    }22092210    fn is_owner_or_admin_permissions(collection: &CollectionHandle<T>, subject: &T::CrossAccountId) -> bool {2211        *subject == collection.owner || <AdminList<T>>::get(collection.id).contains(&subject)2212    }22132214    fn check_owner_or_admin_permissions(2215        collection: &CollectionHandle<T>,2216        subject: &T::CrossAccountId,2217    ) -> DispatchResult {2218        ensure!(Self::is_owner_or_admin_permissions(collection, subject), Error::<T>::NoPermission);22192220        Ok(())2221    }22222223    fn owned_amount(2224        subject: &T::CrossAccountId,2225        target_collection: &CollectionHandle<T>,2226        item_id: TokenId,2227    ) -> Option<u128> {2228        let collection_id = target_collection.id;22292230        match target_collection.mode {2231            CollectionMode::NFT => (<NftItemList<T>>::get(collection_id, item_id)?.owner == *subject)2232                .then(|| 1),2233            CollectionMode::Fungible(_) => Some(<FungibleItemList<T>>::get(collection_id, &subject.as_sub())2234                .value),2235            CollectionMode::ReFungible => <ReFungibleItemList<T>>::get(collection_id, item_id)?2236                .owner2237                .iter()2238                .find(|i| i.owner == *subject)2239                .map(|i| i.fraction),2240            CollectionMode::Invalid => None,2241        }2242    }22432244    fn is_item_owner(subject: &T::CrossAccountId, target_collection: &CollectionHandle<T>, item_id: TokenId) -> bool {2245        match target_collection.mode {2246            CollectionMode::Fungible(_) => true,2247            _ => Self::owned_amount(&subject, target_collection, item_id).is_some(),2248        }2249    }22502251    fn check_white_list(collection: &CollectionHandle<T>, address: &T::CrossAccountId) -> DispatchResult {2252        let collection_id = collection.id;22532254        let mes = Error::<T>::AddresNotInWhiteList;2255        ensure!(<WhiteList<T>>::contains_key(collection_id, address.as_sub()), mes);22562257        Ok(())2258    }22592260    /// Check if token exists. In case of Fungible, check if there is an entry for 2261    /// the owner in fungible balances double map2262    fn token_exists(2263        target_collection: &CollectionHandle<T>,2264        item_id: TokenId,2265    ) -> DispatchResult {2266        let collection_id = target_collection.id;2267        let exists = match target_collection.mode2268        {2269            CollectionMode::NFT => <NftItemList<T>>::contains_key(collection_id, item_id),2270            CollectionMode::Fungible(_)  => true,2271            CollectionMode::ReFungible  => <ReFungibleItemList<T>>::contains_key(collection_id, item_id),2272            _ => false2273        };22742275        ensure!(exists == true, Error::<T>::TokenNotFound);2276        Ok(())2277    }22782279    fn transfer_fungible(2280        collection: &CollectionHandle<T>,2281        value: u128,2282        owner: &T::CrossAccountId,2283        recipient: &T::CrossAccountId,2284    ) -> DispatchResult {2285        let collection_id = collection.id;22862287        let mut balance = <FungibleItemList<T>>::get(collection_id, owner.as_sub());2288        ensure!(balance.value >= value, Error::<T>::TokenValueTooLow);22892290        // Send balance to recipient (updates balanceOf of recipient)2291        Self::add_fungible_item(collection, recipient, value)?;22922293        // update balanceOf of sender2294        <Balance<T>>::insert(collection_id, owner.as_sub(), balance.value - value);22952296        // Reduce or remove sender2297        if balance.value == value {2298            <FungibleItemList<T>>::remove(collection_id, owner.as_sub());2299        }2300        else {2301            balance.value -= value;2302            <FungibleItemList<T>>::insert(collection_id, owner.as_sub(), balance);2303        }23042305        collection.log(2306            Vec::from([2307                eth::TRANSFER_FUNGIBLE_TOPIC,2308                eth::address_to_topic(owner.as_eth()),2309                eth::address_to_topic(recipient.as_eth()),2310            ]),2311            abi_encode!(uint256(value.into())),2312        );2313        Self::deposit_event(RawEvent::Transfer(collection.id, 1, owner.clone(), recipient.clone(), value));23142315        Ok(())2316    }23172318    fn transfer_refungible(2319        collection: &CollectionHandle<T>,2320        item_id: TokenId,2321        value: u128,2322        owner: T::CrossAccountId,2323        new_owner: T::CrossAccountId,2324    ) -> DispatchResult {2325        let collection_id = collection.id;2326        let full_item = <ReFungibleItemList<T>>::get(collection_id, item_id)2327            .ok_or(Error::<T>::TokenNotFound)?;23282329        let item = full_item2330            .owner2331            .iter()2332            .filter(|i| i.owner == owner)2333            .next()2334            .ok_or(Error::<T>::TokenNotFound)?;2335        let amount = item.fraction;23362337        ensure!(amount >= value, Error::<T>::TokenValueTooLow);23382339        // update balance2340        let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.as_sub())2341            .checked_sub(value)2342            .ok_or(Error::<T>::NumOverflow)?;2343        <Balance<T>>::insert(collection_id, item.owner.as_sub(), balance_old_owner);23442345        let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.as_sub())2346            .checked_add(value)2347            .ok_or(Error::<T>::NumOverflow)?;2348        <Balance<T>>::insert(collection_id, new_owner.as_sub(), balance_new_owner);23492350        let old_owner = item.owner.clone();2351        let new_owner_has_account = full_item.owner.iter().any(|i| i.owner == new_owner);23522353        // transfer2354        if amount == value && !new_owner_has_account {2355            // change owner2356            // new owner do not have account2357            let mut new_full_item = full_item.clone();2358            new_full_item2359                .owner2360                .iter_mut()2361                .find(|i| i.owner == owner)2362                .expect("old owner does present in refungible")2363                .owner = new_owner.clone();2364            <ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);23652366            // update index collection2367            Self::move_token_index(collection_id, item_id, &old_owner, &new_owner)?;2368        } else {2369            let mut new_full_item = full_item.clone();2370            new_full_item2371                .owner2372                .iter_mut()2373                .find(|i| i.owner == owner)2374                .expect("old owner does present in refungible")2375                .fraction -= value;23762377            // separate amount2378            if new_owner_has_account {2379                // new owner has account2380                new_full_item2381                    .owner2382                    .iter_mut()2383                    .find(|i| i.owner == new_owner)2384                    .expect("new owner has account")2385                    .fraction += value;2386            } else {2387                // new owner do not have account2388                new_full_item.owner.push(Ownership {2389                    owner: new_owner.clone(),2390                    fraction: value,2391                });2392                Self::add_token_index(collection_id, item_id, &new_owner)?;2393            }23942395            <ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);2396        }23972398        Self::deposit_event(RawEvent::Transfer(collection.id, item_id, owner, new_owner, amount));23992400        Ok(())2401    }24022403    fn transfer_nft(2404        collection: &CollectionHandle<T>,2405        item_id: TokenId,2406        sender: T::CrossAccountId,2407        new_owner: T::CrossAccountId,2408    ) -> DispatchResult {2409        let collection_id = collection.id;2410        let mut item = <NftItemList<T>>::get(collection_id, item_id)2411            .ok_or(Error::<T>::TokenNotFound)?;24122413        ensure!(2414            sender == item.owner,2415            Error::<T>::MustBeTokenOwner2416        );24172418        // update balance2419        let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.as_sub())2420            .checked_sub(1)2421            .ok_or(Error::<T>::NumOverflow)?;2422        <Balance<T>>::insert(collection_id, item.owner.as_sub(), balance_old_owner);24232424        let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.as_sub())2425            .checked_add(1)2426            .ok_or(Error::<T>::NumOverflow)?;2427        <Balance<T>>::insert(collection_id, new_owner.as_sub(), balance_new_owner);24282429        // change owner2430        let old_owner = item.owner.clone();2431        item.owner = new_owner.clone();2432        <NftItemList<T>>::insert(collection_id, item_id, item);24332434        // update index collection2435        Self::move_token_index(collection_id, item_id, &old_owner, &new_owner)?;24362437        collection.log(2438            Vec::from([2439                eth::TRANSFER_NFT_TOPIC,2440                eth::address_to_topic(sender.as_eth()),2441                eth::address_to_topic(new_owner.as_eth()),2442            ]),2443            abi_encode!(uint256(item_id.into())),2444        );2445        Self::deposit_event(RawEvent::Transfer(collection.id, item_id, sender, new_owner, 1));24462447        Ok(())2448    }2449    2450    fn set_re_fungible_variable_data(2451        collection: &CollectionHandle<T>,2452        item_id: TokenId,2453        data: Vec<u8>2454    ) -> DispatchResult {2455        let collection_id = collection.id;2456        let mut item = <ReFungibleItemList<T>>::get(collection_id, item_id)2457            .ok_or(Error::<T>::TokenNotFound)?;24582459        item.variable_data = data;24602461        <ReFungibleItemList<T>>::insert(collection_id, item_id, item);24622463        Ok(())2464    }24652466    fn set_nft_variable_data(2467        collection: &CollectionHandle<T>,2468        item_id: TokenId,2469        data: Vec<u8>2470    ) -> DispatchResult {2471        let collection_id = collection.id;2472        let mut item = <NftItemList<T>>::get(collection_id, item_id)2473            .ok_or(Error::<T>::TokenNotFound)?;2474        2475        item.variable_data = data;24762477        <NftItemList<T>>::insert(collection_id, item_id, item);2478        2479        Ok(())2480    }24812482    fn init_collection(item: &Collection<T>) {2483        // check params2484        assert!(2485            item.decimal_points <= MAX_DECIMAL_POINTS,2486            "decimal_points parameter must be lower than MAX_DECIMAL_POINTS"2487        );2488        assert!(2489            item.name.len() <= 64,2490            "Collection name can not be longer than 63 char"2491        );2492        assert!(2493            item.name.len() <= 256,2494            "Collection description can not be longer than 255 char"2495        );2496        assert!(2497            item.token_prefix.len() <= 16,2498            "Token prefix can not be longer than 15 char"2499        );25002501        // Generate next collection ID2502        let next_id = CreatedCollectionCount::get()2503            .checked_add(1)2504            .unwrap();25052506        CreatedCollectionCount::put(next_id);2507    }25082509    fn init_nft_token(collection_id: CollectionId, item: &NftItemType<T::CrossAccountId>) {2510        let current_index = <ItemListIndex>::get(collection_id)2511            .checked_add(1)2512            .unwrap();25132514        Self::add_token_index(collection_id, current_index, &item.owner).unwrap();25152516        <ItemListIndex>::insert(collection_id, current_index);25172518        // Update balance2519        let new_balance = <Balance<T>>::get(collection_id, item.owner.as_sub())2520            .checked_add(1)2521            .unwrap();2522        <Balance<T>>::insert(collection_id, item.owner.as_sub(), new_balance);2523    }25242525    fn init_fungible_token(collection_id: CollectionId, owner: &T::CrossAccountId, item: &FungibleItemType) {2526        let current_index = <ItemListIndex>::get(collection_id)2527            .checked_add(1)2528            .unwrap();25292530        Self::add_token_index(collection_id, current_index, owner).unwrap();25312532        <ItemListIndex>::insert(collection_id, current_index);25332534        // Update balance2535        let new_balance = <Balance<T>>::get(collection_id, owner.as_sub())2536            .checked_add(item.value)2537            .unwrap();2538        <Balance<T>>::insert(collection_id, owner.as_sub(), new_balance);2539    }25402541    fn init_refungible_token(collection_id: CollectionId, item: &ReFungibleItemType<T::CrossAccountId>) {2542        let current_index = <ItemListIndex>::get(collection_id)2543            .checked_add(1)2544            .unwrap();25452546        let value = item.owner.first().unwrap().fraction;2547        let owner = item.owner.first().unwrap().owner.clone();25482549        Self::add_token_index(collection_id, current_index, &owner).unwrap();25502551        <ItemListIndex>::insert(collection_id, current_index);25522553        // Update balance2554        let new_balance = <Balance<T>>::get(collection_id, &owner.as_sub())2555            .checked_add(value)2556            .unwrap();2557        <Balance<T>>::insert(collection_id, owner.as_sub(), new_balance);2558    }25592560    fn add_token_index(collection_id: CollectionId, item_index: TokenId, owner: &T::CrossAccountId) -> DispatchResult {2561        // add to account limit2562        if <AccountItemCount<T>>::contains_key(owner.as_sub()) {25632564            // bound Owned tokens by a single address2565            let count = <AccountItemCount<T>>::get(owner.as_sub());2566            ensure!(count < ChainLimit::get().account_token_ownership_limit, Error::<T>::AddressOwnershipLimitExceeded);25672568            <AccountItemCount<T>>::insert(owner.as_sub(), count2569                .checked_add(1)2570                .ok_or(Error::<T>::NumOverflow)?);2571        }2572        else {2573            <AccountItemCount<T>>::insert(owner.as_sub(), 1);2574        }25752576        let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner.as_sub());2577        if list_exists {2578            let mut list = <AddressTokens<T>>::get(collection_id, owner.as_sub());2579            let item_contains = list.contains(&item_index.clone());25802581            if !item_contains {2582                list.push(item_index.clone());2583            }25842585            <AddressTokens<T>>::insert(collection_id, owner.as_sub(), list);2586        } else {2587            let mut itm = Vec::new();2588            itm.push(item_index.clone());2589            <AddressTokens<T>>::insert(collection_id, owner.as_sub(), itm);2590        }25912592        Ok(())2593    }25942595    fn remove_token_index(2596        collection_id: CollectionId,2597        item_index: TokenId,2598        owner: &T::CrossAccountId,2599    ) -> DispatchResult {26002601        // update counter2602        <AccountItemCount<T>>::insert(owner.as_sub(), 2603            <AccountItemCount<T>>::get(owner.as_sub())2604            .checked_sub(1)2605            .ok_or(Error::<T>::NumOverflow)?);260626072608        let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner.as_sub());2609        if list_exists {2610            let mut list = <AddressTokens<T>>::get(collection_id, owner.as_sub());2611            let item_contains = list.contains(&item_index.clone());26122613            if item_contains {2614                list.retain(|&item| item != item_index);2615                <AddressTokens<T>>::insert(collection_id, owner.as_sub(), list);2616            }2617        }26182619        Ok(())2620    }26212622    fn move_token_index(2623        collection_id: CollectionId,2624        item_index: TokenId,2625        old_owner: &T::CrossAccountId,2626        new_owner: &T::CrossAccountId,2627    ) -> DispatchResult {2628        Self::remove_token_index(collection_id, item_index, old_owner)?;2629        Self::add_token_index(collection_id, item_index, new_owner)?;26302631        Ok(())2632    }2633    2634    fn ensure_contract_owned(account: T::AccountId, contract: &T::AccountId) -> DispatchResult {2635        ensure!(<ContractOwner<T>>::get(contract) == Some(account), Error::<T>::NoPermission);26362637        Ok(())2638    }2639}26402641////////////////////////////////////////////////////////////////////////////////////////////////////2642// Economic models2643// #region26442645/// Fee multiplier.2646pub type Multiplier = FixedU128;26472648type BalanceOf<T> = <<T as pallet_transaction_payment::Config>::OnChargeTransaction as pallet_transaction_payment::OnChargeTransaction<T>>::Balance;26492650/// Require the transactor pay for themselves and maybe include a tip to gain additional priority2651/// in the queue.2652#[derive(Encode, Decode, Clone, Eq, PartialEq)]2653pub struct ChargeTransactionPayment<T: Config>(#[codec(compact)] BalanceOf<T>);26542655impl<T: Config + Send + Sync> sp_std::fmt::Debug 2656    for ChargeTransactionPayment<T>2657{2658	#[cfg(feature = "std")]2659	fn fmt(&self, f: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {2660		write!(f, "ChargeTransactionPayment<{:?}>", self.0)2661	}2662	#[cfg(not(feature = "std"))]2663	fn fmt(&self, _: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {2664		Ok(())2665	}2666}26672668impl<T: Config> ChargeTransactionPayment<T>2669where2670    T::Call: Dispatchable<Info=DispatchInfo, PostInfo=PostDispatchInfo> + IsSubType<Call<T>> + IsSubType<pallet_contracts::Call<T>>,2671    BalanceOf<T>: Send + Sync + From<u64> + FixedPointOperand,2672    T::AccountId: AsRef<[u8]>,2673    T::AccountId: UncheckedFrom<T::Hash>,2674{2675    fn traditional_fee(2676        len: usize,2677        info: &DispatchInfoOf<T::Call>,2678        tip: BalanceOf<T>,2679    ) -> BalanceOf<T>2680    where2681        T::Call: Dispatchable<Info = DispatchInfo>,2682    {2683        <pallet_transaction_payment::Module<T>>::compute_fee(len as u32, info, tip)2684    }26852686	fn get_priority(len: usize, info: &DispatchInfoOf<T::Call>, final_fee: BalanceOf<T>) -> TransactionPriority {2687        let weight_saturation = T::BlockWeights::get().max_block / info.weight.max(1);2688        let max_block_length = *T::BlockLength::get().max.get(DispatchClass::Normal);2689        let len_saturation = max_block_length as u64 / (len as u64).max(1);2690        let coefficient: BalanceOf<T> = weight_saturation2691            .min(len_saturation)2692            .saturated_into::<BalanceOf<T>>();2693        final_fee2694            .saturating_mul(coefficient)2695            .saturated_into::<TransactionPriority>()2696    }26972698    fn withdraw_fee(2699        &self,2700        who: &T::AccountId,2701        call: &T::Call,2702        info: &DispatchInfoOf<T::Call>,2703        len: usize,2704	) -> Result<2705		(2706			BalanceOf<T>,2707			<<T as pallet_transaction_payment::Config>::OnChargeTransaction as pallet_transaction_payment::OnChargeTransaction<T>>::LiquidityInfo,2708		),2709		TransactionValidityError,2710	> {2711        let tip = self.0;27122713        let fee = Self::traditional_fee(len, info, tip);27142715        // Only mess with balances if fee is not zero.2716        if fee.is_zero() {2717            return <<T as pallet_transaction_payment::Config>::OnChargeTransaction as pallet_transaction_payment::OnChargeTransaction<T>>::withdraw_fee(who, call, info, fee, tip)2718			.map(|i| (fee, i));2719        }27202721        // Determine who is paying transaction fee based on ecnomic model2722        // Parse call to extract collection ID and access collection sponsor2723        let mut sponsor: Option<T::AccountId> = (|| match IsSubType::<Call<T>>::is_sub_type(call) {2724            Some(Call::create_item(collection_id, _owner, _properties)) => {2725                let collection = <CollectionById<T>>::get(collection_id)?;27262727                // sponsor timeout2728                let block_number = <system::Module<T>>::block_number() as T::BlockNumber;27292730                let limit = collection.limits.sponsor_transfer_timeout;2731                if <CreateItemBasket<T>>::contains_key((collection_id, &who)) {2732                    let last_tx_block = <CreateItemBasket<T>>::get((collection_id, &who));2733                    let limit_time = last_tx_block + limit.into();2734                    if block_number <= limit_time {2735                        return None;2736                    }2737                }2738                <CreateItemBasket<T>>::insert((collection_id, who.clone()), block_number);27392740                // check free create limit2741                if collection.limits.sponsored_data_size >= (_properties.len() as u32) {2742                    collection.sponsorship.sponsor()2743                        .cloned()2744                } else {2745                    None2746                }2747            }2748            Some(Call::transfer(_new_owner, collection_id, item_id, _value)) => {2749                let collection = <CollectionById<T>>::get(collection_id)?;2750                2751                let mut sponsor_transfer = false;2752                if collection.sponsorship.confirmed() {27532754                    let collection_limits = collection.limits;2755                    let collection_mode = collection.mode;2756    2757                    // sponsor timeout2758                    let block_number = <system::Module<T>>::block_number() as T::BlockNumber;2759                    sponsor_transfer = match collection_mode {2760                        CollectionMode::NFT => {2761    2762                            // get correct limit2763                            let limit: u32 = if collection_limits.sponsor_transfer_timeout > 0 {2764                                collection_limits.sponsor_transfer_timeout2765                            } else {2766                                ChainLimit::get().nft_sponsor_transfer_timeout2767                            };2768    2769                            let mut sponsored = true;2770                            if <NftTransferBasket<T>>::contains_key(collection_id, item_id) {2771                                let last_tx_block = <NftTransferBasket<T>>::get(collection_id, item_id);2772                                let limit_time = last_tx_block + limit.into();2773                                if block_number <= limit_time {2774                                    sponsored = false;2775                                }2776                            }2777                            if sponsored {2778                                <NftTransferBasket<T>>::insert(collection_id, item_id, block_number);2779                            }27802781                            sponsored2782                        }2783                        CollectionMode::Fungible(_) => {2784    2785                            // get correct limit2786                            let limit: u32 = if collection_limits.sponsor_transfer_timeout > 0 {2787                                collection_limits.sponsor_transfer_timeout2788                            } else {2789                                ChainLimit::get().fungible_sponsor_transfer_timeout2790                            };2791    2792                            let block_number = <system::Module<T>>::block_number() as T::BlockNumber;2793                            let mut sponsored = true;2794                            if <FungibleTransferBasket<T>>::contains_key(collection_id, who) {2795                                let last_tx_block = <FungibleTransferBasket<T>>::get(collection_id, who);2796                                let limit_time = last_tx_block + limit.into();2797                                if block_number <= limit_time {2798                                    sponsored = false;2799                                }2800                            }2801                            if sponsored {2802                                <FungibleTransferBasket<T>>::insert(collection_id, who, block_number);2803                            }28042805                            sponsored2806                        }2807                        CollectionMode::ReFungible => {2808    2809                            // get correct limit2810                            let limit: u32 = if collection_limits.sponsor_transfer_timeout > 0 {2811                                collection_limits.sponsor_transfer_timeout2812                            } else {2813                                ChainLimit::get().refungible_sponsor_transfer_timeout2814                            };2815    2816                            let mut sponsored = true;2817                            if <ReFungibleTransferBasket<T>>::contains_key(collection_id, item_id) {2818                                let last_tx_block = <ReFungibleTransferBasket<T>>::get(collection_id, item_id);2819                                let limit_time = last_tx_block + limit.into();2820                                if block_number <= limit_time {2821                                    sponsored = false;2822                                }2823                            }2824                            if sponsored {2825                                <ReFungibleTransferBasket<T>>::insert(collection_id, item_id, block_number);2826                            }28272828                            sponsored2829                        }2830                        _ => {2831                            false2832                        },2833                    };2834                }28352836                if !sponsor_transfer {2837                    None2838                } else {2839                    collection.sponsorship.sponsor()2840                        .cloned()2841                }2842            }28432844            Some(Call::set_variable_meta_data(collection_id, item_id, data)) => {2845                let mut sponsor_metadata_changes = false;28462847                let collection = <CollectionById<T>>::get(collection_id)?;28482849                if2850                    collection.sponsorship.confirmed() &&2851                    // Can't sponsor fungible collection, this tx will be rejected2852                    // as invalid2853                    !matches!(collection.mode, CollectionMode::Fungible(_)) &&2854                    data.len() <= collection.limits.sponsored_data_size as usize2855                {2856                    if let Some(rate_limit) = collection.limits.sponsored_data_rate_limit {2857                        let block_number = <system::Module<T>>::block_number() as T::BlockNumber;28582859                        if <VariableMetaDataBasket<T>>::get(collection_id, item_id)2860                            .map(|last_block| block_number - last_block > rate_limit)2861                            .unwrap_or(true) 2862                        {2863                            sponsor_metadata_changes = true;2864                            <VariableMetaDataBasket<T>>::insert(collection_id, item_id, block_number);2865                        }2866                    }2867                }28682869                if !sponsor_metadata_changes {2870                    None2871                } else {2872                    collection.sponsorship.sponsor().cloned()2873                }2874            }28752876            _ => None,2877        })();28782879        match IsSubType::<pallet_contracts::Call<T>>::is_sub_type(call) {2880            Some(pallet_contracts::Call::call(dest, _value, _gas_limit, _data)) => {28812882                let called_contract: T::AccountId = T::Lookup::lookup((*dest).clone()).unwrap_or(T::AccountId::default());28832884                let owned_contract = <ContractOwner<T>>::get(called_contract.clone()).as_ref() == Some(who);2885                let white_list_enabled = <ContractWhiteListEnabled<T>>::contains_key(called_contract.clone());2886                  2887                if !owned_contract && white_list_enabled {2888                    if !<ContractWhiteList<T>>::contains_key(called_contract.clone(), who) {2889                        return Err(InvalidTransaction::Call.into());2890                    }2891                }2892            },2893            _ => {},2894        }28952896        // Sponsor smart contracts2897        sponsor = sponsor.or_else(|| match IsSubType::<pallet_contracts::Call<T>>::is_sub_type(call) {28982899            // On instantiation: set the contract owner2900            Some(pallet_contracts::Call::instantiate(_endowment, _gas_limit, code_hash, _data, salt)) => {29012902                let new_contract_address = <pallet_contracts::Module<T>>::contract_address(2903                    &who,2904                    code_hash,2905                    salt,2906                );2907                <ContractOwner<T>>::insert(new_contract_address.clone(), who.clone());29082909                None2910            },29112912            // On instantiation with code: set the contract owner2913            Some(pallet_contracts::Call::instantiate_with_code(_endowment, _gas_limit, _code, _data, _salt))  => {29142915                let new_contract_address = <pallet_contracts::Module<T>>::contract_address(2916                    &who,2917                    &T::Hashing::hash(&_code),2918                    _salt,2919                );29202921                <ContractOwner<T>>::insert(new_contract_address.clone(), who.clone());29222923                None2924            }29252926            // When the contract is called, check if the sponsoring is enabled and pay fees from contract endowment if it is2927            Some(pallet_contracts::Call::call(dest, _value, _gas_limit, _data)) => {29282929                let called_contract: T::AccountId = T::Lookup::lookup((*dest).clone()).unwrap_or(T::AccountId::default());29302931                let mut sponsor_transfer = false;2932                if <ContractSponsoringRateLimit<T>>::contains_key(called_contract.clone()) {2933                    let last_tx_block = <ContractSponsorBasket<T>>::get((&called_contract, &who));2934                    let block_number = <system::Module<T>>::block_number() as T::BlockNumber;2935                    let rate_limit = <ContractSponsoringRateLimit<T>>::get(&called_contract);2936                    let limit_time = last_tx_block + rate_limit;29372938                    if block_number >= limit_time {2939                        <ContractSponsorBasket<T>>::insert((called_contract.clone(), who.clone()), block_number);2940                        sponsor_transfer = true;2941                    }2942                } else {2943                    sponsor_transfer = false;2944                }2945               2946                if sponsor_transfer {2947                    if <ContractSelfSponsoring<T>>::contains_key(called_contract.clone()) {2948                        if <ContractSelfSponsoring<T>>::get(called_contract.clone()) {2949                            return Some(called_contract);2950                        }2951                    }2952                }29532954                None2955            },29562957            _ => None,2958        });29592960        let who_pays_fee = sponsor.unwrap_or_else(|| who.clone());29612962		<<T as pallet_transaction_payment::Config>::OnChargeTransaction as pallet_transaction_payment::OnChargeTransaction<T>>::withdraw_fee(&who_pays_fee, call, info, fee, tip)2963			.map(|i| (fee, i))2964    }2965}296629672968impl<T: Config + Send + Sync> SignedExtension2969    for ChargeTransactionPayment<T>2970where2971    BalanceOf<T>: Send + Sync + From<u64> + FixedPointOperand,2972    T::Call: Dispatchable<Info = DispatchInfo, PostInfo = PostDispatchInfo> + IsSubType<Call<T>> + IsSubType<pallet_contracts::Call<T>>,2973    T::AccountId: AsRef<[u8]>,2974    T::AccountId: UncheckedFrom<T::Hash>,2975{2976    const IDENTIFIER: &'static str = "ChargeTransactionPayment";2977    type AccountId = T::AccountId;2978    type Call = T::Call;2979    type AdditionalSigned = ();2980    type Pre = (2981        // tip2982        BalanceOf<T>,2983        // who pays fee2984        Self::AccountId,2985		// imbalance resulting from withdrawing the fee2986		<<T as pallet_transaction_payment::Config>::OnChargeTransaction as pallet_transaction_payment::OnChargeTransaction<T>>::LiquidityInfo,2987    );2988    fn additional_signed(&self) -> sp_std::result::Result<(), TransactionValidityError> {2989        Ok(())2990    }29912992    fn validate(2993        &self,2994        who: &Self::AccountId,2995        call: &Self::Call,2996        info: &DispatchInfoOf<Self::Call>,2997        len: usize,2998    ) -> TransactionValidity {2999		let (fee, _) = self.withdraw_fee(who, call, info, len)?;3000		Ok(ValidTransaction {3001			priority: Self::get_priority(len, info, fee),3002			..Default::default()3003		})3004    }30053006    fn pre_dispatch(3007        self,3008        who: &Self::AccountId,3009        call: &Self::Call,3010        info: &DispatchInfoOf<Self::Call>,3011        len: usize,3012    ) -> Result<Self::Pre, TransactionValidityError> {3013        let (_fee, imbalance) = self.withdraw_fee(who, call, info, len)?;3014        Ok((self.0, who.clone(), imbalance))3015    }30163017    fn post_dispatch(3018        pre: Self::Pre,3019        info: &DispatchInfoOf<Self::Call>,3020        post_info: &PostDispatchInfoOf<Self::Call>,3021        len: usize,3022        _result: &DispatchResult,3023    ) -> Result<(), TransactionValidityError> {3024		let (tip, who, imbalance) = pre;3025		let actual_fee = pallet_transaction_payment::Module::<T>::compute_actual_fee(3026			len as u32,3027			info,3028			post_info,3029			tip,3030		);3031		<T as pallet_transaction_payment::Config>::OnChargeTransaction::correct_and_deposit_fee(&who, info, post_info, actual_fee, tip, imbalance)?;3032		Ok(())3033    }3034}30353036// #endregion30373038sp_api::decl_runtime_apis! {3039    pub trait NftApi {3040        /// Used for ethereum integration3041        fn eth_contract_code(account: H160) -> Option<Vec<u8>>;3042    }3043}