git.delta.rocks / unique-network / refs/commits / 0053d9ad7a67

1#![cfg_attr(not(feature = "std"), no_std)]23/// For more guidance on Substrate FRAME, see the example pallet4/// https://github.com/paritytech/substrate/blob/master/frame/example/src/lib.rs5use codec::{Decode, Encode};6pub use frame_support::{7    construct_runtime, decl_event, decl_module, decl_storage,8    dispatch::DispatchResult,9    ensure, parameter_types,10    traits::{11        Currency, ExistenceRequirement, Get, Imbalance, KeyOwnerProofSystem, OnUnbalanced,12        Randomness, WithdrawReason,13    },14    weights::{15        constants::{BlockExecutionWeight, ExtrinsicBaseWeight, RocksDbWeight, WEIGHT_PER_SECOND},16        DispatchInfo, GetDispatchInfo, IdentityFee, Pays, PostDispatchInfo, Weight,17        WeightToFeePolynomial,18    },19    IsSubType, StorageValue,20};2122use frame_system::{self as system, ensure_signed};23use sp_runtime::sp_std::prelude::Vec;24use sp_runtime::{25    traits::{26        DispatchInfoOf, Dispatchable, PostDispatchInfoOf, SaturatedConversion, Saturating,27        SignedExtension, Zero,28    },29    transaction_validity::{30        InvalidTransaction, TransactionPriority, TransactionValidity, TransactionValidityError,31        ValidTransaction,32    },33    FixedPointOperand, FixedU128,34};35use sp_std::prelude::*;3637#[cfg(test)]38mod mock;3940#[cfg(test)]41mod tests;4243#[derive(Encode, Decode, Debug, Eq, Clone, PartialEq)]44pub enum CollectionMode {45    Invalid,46    // custom data size47    NFT(u32),48    // decimal points49    Fungible(u32),50    // custom data size and decimal points51    ReFungible(u32, u32),52}5354impl Into<u8> for CollectionMode {55    fn into(self) -> u8 {56        match self {57            CollectionMode::Invalid => 0,58            CollectionMode::NFT(_) => 1,59            CollectionMode::Fungible(_) => 2,60            CollectionMode::ReFungible(_, _) => 3,61        }62    }63}6465#[derive(Encode, Decode, Debug, Clone, PartialEq)]66pub enum AccessMode {67    Normal,68    WhiteList,69}70impl Default for AccessMode {71    fn default() -> Self {72        Self::Normal73    }74}7576impl Default for CollectionMode {77    fn default() -> Self {78        Self::Invalid79    }80}8182#[derive(Encode, Decode, Default, Clone, PartialEq)]83#[cfg_attr(feature = "std", derive(Debug))]84pub struct Ownership<AccountId> {85    pub owner: AccountId,86    pub fraction: u128,87}8889#[derive(Encode, Decode, Default, Clone, PartialEq)]90#[cfg_attr(feature = "std", derive(Debug))]91pub struct CollectionType<AccountId> {92    pub owner: AccountId,93    pub mode: CollectionMode,94    pub access: AccessMode,95    pub decimal_points: u32,96    pub name: Vec<u16>,        // 64 include null escape char97    pub description: Vec<u16>, // 256 include null escape char98    pub token_prefix: Vec<u8>, // 16 include null escape char99    pub custom_data_size: u32,100    pub mint_mode: bool,101    pub offchain_schema: Vec<u8>,102    pub sponsor: AccountId, // Who pays fees. If set to default address, the fees are applied to the transaction sender103    pub unconfirmed_sponsor: AccountId, // Sponsor address that has not yet confirmed sponsorship104}105106#[derive(Encode, Decode, Default, Clone, PartialEq)]107#[cfg_attr(feature = "std", derive(Debug))]108pub struct CollectionAdminsType<AccountId> {109    pub admin: AccountId,110    pub collection_id: u64,111}112113#[derive(Encode, Decode, Default, Clone, PartialEq)]114#[cfg_attr(feature = "std", derive(Debug))]115pub struct NftItemType<AccountId> {116    pub collection: u64,117    pub owner: AccountId,118    pub data: Vec<u8>,119}120121#[derive(Encode, Decode, Default, Clone, PartialEq)]122#[cfg_attr(feature = "std", derive(Debug))]123pub struct FungibleItemType<AccountId> {124    pub collection: u64,125    pub owner: AccountId,126    pub value: u128,127}128129#[derive(Encode, Decode, Default, Clone, PartialEq)]130#[cfg_attr(feature = "std", derive(Debug))]131pub struct ReFungibleItemType<AccountId> {132    pub collection: u64,133    pub owner: Vec<Ownership<AccountId>>,134    pub data: Vec<u8>,135}136137#[derive(Encode, Decode, Default, Clone, PartialEq)]138#[cfg_attr(feature = "std", derive(Debug))]139pub struct ApprovePermissions<AccountId> {140    pub approved: AccountId,141    pub amount: u64,142}143144#[derive(Encode, Decode, Default, Clone, PartialEq)]145#[cfg_attr(feature = "std", derive(Debug))]146pub struct VestingItem<AccountId, Moment> {147    pub sender: AccountId,148    pub recipient: AccountId,149    pub collection_id: u64,150    pub item_id: u64,151    pub amount: u64,152    pub vesting_date: Moment,153}154155pub trait Trait: system::Trait {156    type Event: From<Event<Self>> + Into<<Self as system::Trait>::Event>;157}158159decl_storage! {160    trait Store for Module<T: Trait> as Nft {161162        // Private members163        NextCollectionID: u64;164        CreatedCollectionCount: u64;165        ChainVersion: u64;166        ItemListIndex: map hasher(blake2_128_concat) u64 => u64;167168        pub Collection get(fn collection): map hasher(identity) u64 => CollectionType<T::AccountId>;169        pub AdminList get(fn admin_list_collection): map hasher(identity) u64 => Vec<T::AccountId>;170        pub WhiteList get(fn white_list): map hasher(identity) u64 => Vec<T::AccountId>;171172        /// Balance owner per collection map173        pub Balance get(fn balance_count): double_map hasher(blake2_128_concat) u64, hasher(blake2_128_concat) T::AccountId => u64;174175        /// second parameter: item id + owner account id176        pub ApprovedList get(fn approved): double_map hasher(blake2_128_concat) u64, hasher(blake2_128_concat) (u64, T::AccountId) => Vec<ApprovePermissions<T::AccountId>>;177178        /// Item collections179        pub NftItemList get(fn nft_item_id): double_map hasher(blake2_128_concat) u64, hasher(blake2_128_concat) u64 => NftItemType<T::AccountId>;180        pub FungibleItemList get(fn fungible_item_id): double_map hasher(blake2_128_concat) u64, hasher(blake2_128_concat) u64 => FungibleItemType<T::AccountId>;181        pub ReFungibleItemList get(fn refungible_item_id): double_map hasher(blake2_128_concat) u64, hasher(blake2_128_concat) u64 => ReFungibleItemType<T::AccountId>;182183        /// Index list184        pub AddressTokens get(fn address_tokens): double_map hasher(blake2_128_concat) u64, hasher(blake2_128_concat) T::AccountId => Vec<u64>;185186        // Sponsorship187        pub ContractSponsor get(fn contract_sponsor): map hasher(identity) T::AccountId => T::AccountId;188        pub UnconfirmedContractSponsor get(fn unconfirmed_contract_sponsor): map hasher(identity) T::AccountId => T::AccountId;189    }190}191192decl_event!(193    pub enum Event<T>194    where195        AccountId = <T as system::Trait>::AccountId,196    {197        Created(u64, u8, AccountId),198        ItemCreated(u64, u64),199        ItemDestroyed(u64, u64),200    }201);202203decl_module! {204    pub struct Module<T: Trait> for enum Call where origin: T::Origin {205206        fn deposit_event() = default;207208        fn on_initialize(now: T::BlockNumber) -> Weight {209210            if ChainVersion::get() < 2211            {212                let value = NextCollectionID::get();213                CreatedCollectionCount::put(value);214                ChainVersion::put(2);215            }216217            0218        }219220        // Create collection of NFT with given parameters221        //222        // @param customDataSz size of custom data in each collection item223        // returns collection ID224        #[weight = 0]225        pub fn create_collection(origin,226                                 collection_name: Vec<u16>,227                                 collection_description: Vec<u16>,228                                 token_prefix: Vec<u8>,229                                 mode: CollectionMode) -> DispatchResult {230231            // Anyone can create a collection232            let who = ensure_signed(origin)?;233            let custom_data_size = match mode {234                CollectionMode::NFT(size) => size,235                CollectionMode::ReFungible(size, _) => size,236                _ => 0237            };238239            let decimal_points = match mode {240                CollectionMode::Fungible(points) => points,241                CollectionMode::ReFungible(_, points) => points,242                _ => 0243            };244245            // check params246            ensure!(decimal_points <= 4, "decimal_points parameter must be lower than 4");247248            let mut name = collection_name.to_vec();249            name.push(0);250            ensure!(name.len() <= 64, "Collection name can not be longer than 63 char");251252            let mut description = collection_description.to_vec();253            description.push(0);254            ensure!(name.len() <= 256, "Collection description can not be longer than 255 char");255256            let mut prefix = token_prefix.to_vec();257            prefix.push(0);258            ensure!(prefix.len() <= 16, "Token prefix can not be longer than 15 char");259260            // Generate next collection ID261            let next_id = CreatedCollectionCount::get()262                .checked_add(1)263                .expect("collection id error");264265            CreatedCollectionCount::put(next_id);266267            // Create new collection268            let new_collection = CollectionType {269                owner: who.clone(),270                name: name,271                mode: mode.clone(),272                mint_mode: false,273                access: AccessMode::Normal,274                description: description,275                decimal_points: decimal_points,276                token_prefix: prefix,277                offchain_schema: Vec::new(),278                custom_data_size: custom_data_size,279                sponsor: T::AccountId::default(),280                unconfirmed_sponsor: T::AccountId::default(),281            };282283            // Add new collection to map284            <Collection<T>>::insert(next_id, new_collection);285286            // call event287            Self::deposit_event(RawEvent::Created(next_id, mode.into(), who.clone()));288289            Ok(())290        }291292        #[weight = 0]293        pub fn destroy_collection(origin, collection_id: u64) -> DispatchResult {294295            let sender = ensure_signed(origin)?;296            Self::check_owner_permissions(collection_id, sender)?;297298            // TODO Items remove299            <AddressTokens<T>>::remove_prefix(collection_id);300            <ApprovedList<T>>::remove_prefix(collection_id);301            <Balance<T>>::remove_prefix(collection_id);302            <ItemListIndex>::remove(collection_id);303            <AdminList<T>>::remove(collection_id);304            <Collection<T>>::remove(collection_id);305            <WhiteList<T>>::remove(collection_id);306307            Ok(())308        }309310        #[weight = 0]311        pub fn add_to_white_list(origin, collection_id: u64, address: T::AccountId) -> DispatchResult{312313            let sender = ensure_signed(origin)?;314            Self::check_owner_or_admin_permissions(collection_id, sender)?;315316            let mut white_list_collection: Vec<T::AccountId>;317            if <WhiteList<T>>::contains_key(collection_id) {318                white_list_collection = <WhiteList<T>>::get(collection_id);319                if !white_list_collection.contains(&address.clone())320                {321                    white_list_collection.push(address.clone());322                }323            }324            else {325                white_list_collection = Vec::new();326                white_list_collection.push(address.clone());327            }328329            <WhiteList<T>>::insert(collection_id, white_list_collection);330            Ok(())331        }332333        #[weight = 0]334        pub fn remove_from_white_list(origin, collection_id: u64, address: T::AccountId) -> DispatchResult{335336            let sender = ensure_signed(origin)?;337            Self::check_owner_or_admin_permissions(collection_id, sender)?;338339            if <WhiteList<T>>::contains_key(collection_id) {340                let mut white_list_collection = <WhiteList<T>>::get(collection_id);341                if white_list_collection.contains(&address.clone())342                {343                    white_list_collection.retain(|i| *i != address.clone());344                    <WhiteList<T>>::insert(collection_id, white_list_collection);345                }346            }347348            Ok(())349        }350351        #[weight = 0]352        pub fn set_public_access_mode(origin, collection_id: u64, mode: AccessMode) -> DispatchResult353        {354            let sender = ensure_signed(origin)?;355356            Self::check_owner_permissions(collection_id, sender)?;357            let mut target_collection = <Collection<T>>::get(collection_id);358            target_collection.access = mode;359            <Collection<T>>::insert(collection_id, target_collection);360361            Ok(())362        }363364        #[weight = 0]365        pub fn set_mint_permission(origin, collection_id: u64, mint_permission: bool) -> DispatchResult366        {367            let sender = ensure_signed(origin)?;368369            Self::check_owner_permissions(collection_id, sender)?;370            let mut target_collection = <Collection<T>>::get(collection_id);371            target_collection.mint_mode = mint_permission;372            <Collection<T>>::insert(collection_id, target_collection);373374            Ok(())375        }376377        #[weight = 0]378        pub fn change_collection_owner(origin, collection_id: u64, new_owner: T::AccountId) -> DispatchResult {379380            let sender = ensure_signed(origin)?;381            Self::check_owner_permissions(collection_id, sender)?;382            let mut target_collection = <Collection<T>>::get(collection_id);383            target_collection.owner = new_owner;384            <Collection<T>>::insert(collection_id, target_collection);385386            Ok(())387        }388389        #[weight = 0]390        pub fn add_collection_admin(origin, collection_id: u64, new_admin_id: T::AccountId) -> DispatchResult {391392            let sender = ensure_signed(origin)?;393            Self::check_owner_or_admin_permissions(collection_id, sender)?;394            let mut admin_arr: Vec<T::AccountId> = Vec::new();395396            if <AdminList<T>>::contains_key(collection_id)397            {398                admin_arr = <AdminList<T>>::get(collection_id);399                ensure!(!admin_arr.contains(&new_admin_id), "Account already has admin role");400            }401402            admin_arr.push(new_admin_id);403            <AdminList<T>>::insert(collection_id, admin_arr);404405            Ok(())406        }407408        #[weight = 0]409        pub fn remove_collection_admin(origin, collection_id: u64, account_id: T::AccountId) -> DispatchResult {410411            let sender = ensure_signed(origin)?;412            Self::check_owner_or_admin_permissions(collection_id, sender)?;413414            if <AdminList<T>>::contains_key(collection_id)415            {416                let mut admin_arr = <AdminList<T>>::get(collection_id);417                admin_arr.retain(|i| *i != account_id);418                <AdminList<T>>::insert(collection_id, admin_arr);419            }420421            Ok(())422        }423424        #[weight = 0]425        pub fn set_collection_sponsor(origin, collection_id: u64, new_sponsor: T::AccountId) -> DispatchResult {426427            let sender = ensure_signed(origin)?;428            ensure!(<Collection<T>>::contains_key(collection_id), "This collection does not exist");429430            let mut target_collection = <Collection<T>>::get(collection_id);431            ensure!(sender == target_collection.owner, "You do not own this collection");432433            target_collection.unconfirmed_sponsor = new_sponsor;434            <Collection<T>>::insert(collection_id, target_collection);435436            Ok(())437        }438439        #[weight = 0]440        pub fn confirm_sponsorship(origin, collection_id: u64) -> DispatchResult {441442            let sender = ensure_signed(origin)?;443            ensure!(<Collection<T>>::contains_key(collection_id), "This collection does not exist");444445            let mut target_collection = <Collection<T>>::get(collection_id);446            ensure!(sender == target_collection.unconfirmed_sponsor, "This address is not set as sponsor, use setCollectionSponsor first");447448            target_collection.sponsor = target_collection.unconfirmed_sponsor;449            target_collection.unconfirmed_sponsor = T::AccountId::default();450            <Collection<T>>::insert(collection_id, target_collection);451452            Ok(())453        }454455        #[weight = 0]456        pub fn remove_collection_sponsor(origin, collection_id: u64) -> DispatchResult {457458            let sender = ensure_signed(origin)?;459            ensure!(<Collection<T>>::contains_key(collection_id), "This collection does not exist");460461            let mut target_collection = <Collection<T>>::get(collection_id);462            ensure!(sender == target_collection.owner, "You do not own this collection");463464            target_collection.sponsor = T::AccountId::default();465            <Collection<T>>::insert(collection_id, target_collection);466467            Ok(())468        }469470        #[weight = 0]471        pub fn create_item(origin, collection_id: u64, properties: Vec<u8>, owner: T::AccountId) -> DispatchResult {472473            let sender = ensure_signed(origin)?;474            Self::collection_exists(collection_id)?;475            let target_collection = <Collection<T>>::get(collection_id);476477            if !Self::is_owner_or_admin_permissions(collection_id, sender.clone()) {478                ensure!(target_collection.mint_mode == true, "Collection is not in mint mode");479                Self::check_white_list(collection_id, owner.clone())?;480            }481482            match target_collection.mode483            {484                CollectionMode::NFT(_) => {485486                    // check size487                    ensure!(target_collection.custom_data_size >= properties.len() as u32, "Size of item is too large");488489                    // Create nft item490                    let item = NftItemType {491                        collection: collection_id,492                        owner: owner,493                        data: properties,494                    };495496                    Self::add_nft_item(item)?;497498                },499                CollectionMode::Fungible(_) => {500501                    // check size502                    ensure!(properties.len() as u32 == 0, "Size of item must be 0 with fungible type");503504                    let item = FungibleItemType {505                        collection: collection_id,506                        owner: owner,507                        value: (10 as u128).pow(target_collection.decimal_points)508                    };509510                    Self::add_fungible_item(item)?;511                },512                CollectionMode::ReFungible(_, _) => {513514                    // check size515                    ensure!(target_collection.custom_data_size >= properties.len() as u32, "Size of item is too large");516517                    let mut owner_list = Vec::new();518                    let value = (10 as u128).pow(target_collection.decimal_points);519                    owner_list.push(Ownership {owner: owner, fraction: value});520521                    let item = ReFungibleItemType {522                        collection: collection_id,523                        owner: owner_list,524                        data: properties525                    };526527                    Self::add_refungible_item(item)?;528                },529                _ => ()530            };531532            // call event533            Self::deposit_event(RawEvent::ItemCreated(collection_id, <ItemListIndex>::get(collection_id)));534535            Ok(())536        }537538        #[weight = 0]539        pub fn burn_item(origin, collection_id: u64, item_id: u64) -> DispatchResult {540541            let sender = ensure_signed(origin)?;542            Self::collection_exists(collection_id)?;543            let item_owner = Self::is_item_owner(sender.clone(), collection_id, item_id);544            if !item_owner545            {546                if !Self::is_owner_or_admin_permissions(collection_id, sender.clone()) {  547                    Self::check_white_list(collection_id, sender.clone())?;548                }549            }550            let target_collection = <Collection<T>>::get(collection_id);551552            match target_collection.mode553            {554                CollectionMode::NFT(_) => Self::burn_nft_item(collection_id, item_id)?,555                CollectionMode::Fungible(_)  => Self::burn_fungible_item(collection_id, item_id)?,556                CollectionMode::ReFungible(_, _)  => Self::burn_refungible_item(collection_id, item_id, sender.clone())?,557                _ => ()558            };559560            // call event561            Self::deposit_event(RawEvent::ItemDestroyed(collection_id, item_id));562563            Ok(())564        }565566        #[weight = 0]567        pub fn transfer(origin, recipient: T::AccountId, collection_id: u64, item_id: u64, value: u64) -> DispatchResult {568569            let sender = ensure_signed(origin)?;570571            let item_owner = Self::is_item_owner(sender.clone(), collection_id, item_id);572            if !item_owner {573                Self::check_white_list(collection_id, sender.clone())?;574                Self::check_white_list(collection_id, recipient.clone())?;575            }576577            let target_collection = <Collection<T>>::get(collection_id);578579            match target_collection.mode580            {581                CollectionMode::NFT(_) => Self::transfer_nft(collection_id, item_id, sender.clone(), recipient)?,582                CollectionMode::Fungible(_)  => Self::transfer_fungible(collection_id, item_id, value, sender.clone(), recipient)?,583                CollectionMode::ReFungible(_, _)  => Self::transfer_refungible(collection_id, item_id, value, sender.clone(), recipient)?,584                _ => ()585            };586587            Ok(())588        }589590        #[weight = 0]591        pub fn approve(origin, approved: T::AccountId, collection_id: u64, item_id: u64) -> DispatchResult {592593            let sender = ensure_signed(origin)?;594595            // amount param stub596            let amount = 100000000;597598            let item_owner = Self::is_item_owner(sender.clone(), collection_id, item_id);599            if !item_owner {600                Self::check_white_list(collection_id, approved.clone())?;601            }602603            let list_exists = <ApprovedList<T>>::contains_key(collection_id, (item_id, sender.clone()));604            if list_exists {605606                let mut list = <ApprovedList<T>>::get(collection_id, (item_id, sender.clone()));607                let item_contains = list.iter().any(|i| i.approved == approved);608609                if !item_contains {610                    list.push(ApprovePermissions { approved: approved.clone(), amount: amount });611                    <ApprovedList<T>>::insert(collection_id, (item_id, sender.clone()), list);612                }613            } else {614615                let mut list = Vec::new();616                list.push(ApprovePermissions { approved: approved.clone(), amount: amount });617                <ApprovedList<T>>::insert(collection_id, (item_id, sender.clone()), list);618            }619620            Ok(())621        }622623        #[weight = 0]624        pub fn transfer_from(origin, from: T::AccountId, recipient: T::AccountId, collection_id: u64, item_id: u64, value: u64 ) -> DispatchResult {625626            let sender = ensure_signed(origin)?;627            let approved_list_exists = <ApprovedList<T>>::contains_key(collection_id, (item_id, from.clone()));628629            ensure!(approved_list_exists, "Only approved addresses can call this method");630631            Self::check_white_list(collection_id, from.clone())?;632            Self::check_white_list(collection_id, recipient.clone())?;633634            let list_itm = <ApprovedList<T>>::get(collection_id, (item_id, from.clone()));635            let opt_item = list_itm.iter().find(|i| i.approved == sender.clone());636            ensure!(opt_item.is_some(), "No approve found");637            ensure!(opt_item.unwrap().amount >= value, "Requested value more than approved");638639            // remove approve640            let approve_list: Vec<ApprovePermissions<T::AccountId>> = <ApprovedList<T>>::get(collection_id, (item_id, from.clone()))641                .into_iter().filter(|i| i.approved != sender.clone()).collect();642            <ApprovedList<T>>::insert(collection_id, (item_id, from.clone()), approve_list);643644            let target_collection = <Collection<T>>::get(collection_id);645646            match target_collection.mode647            {648                CollectionMode::NFT(_) => Self::transfer_nft(collection_id, item_id, from, recipient)?,649                CollectionMode::Fungible(_)  => Self::transfer_fungible(collection_id, item_id, value, from.clone(), recipient)?,650                CollectionMode::ReFungible(_, _)  => Self::transfer_refungible(collection_id, item_id, value, from.clone(), recipient)?,651                _ => ()652            };653654            Ok(())655        }656657        #[weight = 0]658        pub fn safe_transfer_from(origin, collection_id: u64, item_id: u64, new_owner: T::AccountId) -> DispatchResult {659660            // let no_perm_mes = "You do not have permissions to modify this collection";661            // ensure!(<ApprovedList<T>>::contains_key((collection_id, item_id)), no_perm_mes);662            // let list_itm = <ApprovedList<T>>::get((collection_id, item_id));663            // ensure!(list_itm.contains(&new_owner.clone()), no_perm_mes);664665            // // on_nft_received  call666667            // Self::transfer(origin, collection_id, item_id, new_owner)?;668669            Ok(())670        }671672        #[weight = 0]673        pub fn set_offchain_schema(674            origin,675            collection_id: u64,676            schema: Vec<u8>677        ) -> DispatchResult {678            let sender = ensure_signed(origin)?;679            Self::check_owner_or_admin_permissions(collection_id, sender.clone())?;680681            let mut target_collection = <Collection<T>>::get(collection_id);682            target_collection.offchain_schema = schema;683            <Collection<T>>::insert(collection_id, target_collection);684685            Ok(())686        }687    }688}689690impl<T: Trait> Module<T> {691    fn add_fungible_item(item: FungibleItemType<T::AccountId>) -> DispatchResult {692        let current_index = <ItemListIndex>::get(item.collection)693            .checked_add(1)694            .expect("Item list index id error");695        let itemcopy = item.clone();696        let owner = item.owner.clone();697        let value = item.value as u64;698699        Self::add_token_index(item.collection, current_index, owner.clone())?;700701        <ItemListIndex>::insert(item.collection, current_index);702        <FungibleItemList<T>>::insert(item.collection, current_index, itemcopy);703704        // Update balance705        let new_balance = <Balance<T>>::get(item.collection, owner.clone())706            .checked_add(value)707            .unwrap();708        <Balance<T>>::insert(item.collection, owner.clone(), new_balance);709710        Ok(())711    }712713    fn add_refungible_item(item: ReFungibleItemType<T::AccountId>) -> DispatchResult {714        let current_index = <ItemListIndex>::get(item.collection)715            .checked_add(1)716            .expect("Item list index id error");717        let itemcopy = item.clone();718719        let value = item.owner.first().unwrap().fraction as u64;720        let owner = item.owner.first().unwrap().owner.clone();721722        Self::add_token_index(item.collection, current_index, owner.clone())?;723724        <ItemListIndex>::insert(item.collection, current_index);725        <ReFungibleItemList<T>>::insert(item.collection, current_index, itemcopy);726727        // Update balance728        let new_balance = <Balance<T>>::get(item.collection, owner.clone())729            .checked_add(value)730            .unwrap();731        <Balance<T>>::insert(item.collection, owner.clone(), new_balance);732733        Ok(())734    }735736    fn add_nft_item(item: NftItemType<T::AccountId>) -> DispatchResult {737        let current_index = <ItemListIndex>::get(item.collection)738            .checked_add(1)739            .expect("Item list index id error");740741        let item_owner = item.owner.clone();742        let collection_id = item.collection.clone();743        Self::add_token_index(collection_id, current_index, item.owner.clone())?;744745        <ItemListIndex>::insert(collection_id, current_index);746        <NftItemList<T>>::insert(collection_id, current_index, item);747748        // Update balance749        let new_balance = <Balance<T>>::get(collection_id, item_owner.clone())750            .checked_add(1)751            .unwrap();752        <Balance<T>>::insert(collection_id, item_owner.clone(), new_balance);753754        Ok(())755    }756757    fn burn_refungible_item(collection_id: u64, item_id: u64, owner: T::AccountId) -> DispatchResult {758        ensure!(759            <ReFungibleItemList<T>>::contains_key(collection_id, item_id),760            "Item does not exists"761        );762        let collection = <ReFungibleItemList<T>>::get(collection_id, item_id);763        let item = collection764            .owner765            .iter()766            .filter(|&i| i.owner == owner)767            .next()768            .unwrap();769        Self::remove_token_index(collection_id, item_id, owner.clone())?;770771        // remove approve list772        <ApprovedList<T>>::remove(collection_id, (item_id, owner.clone()));773774        // update balance775        let new_balance = <Balance<T>>::get(collection_id, item.owner.clone())776            .checked_sub(item.fraction as u64)777            .unwrap();778        <Balance<T>>::insert(collection_id, item.owner.clone(), new_balance);779780        <ReFungibleItemList<T>>::remove(collection_id, item_id);781782        Ok(())783    }784785    fn burn_nft_item(collection_id: u64, item_id: u64) -> DispatchResult {786        ensure!(787            <NftItemList<T>>::contains_key(collection_id, item_id),788            "Item does not exists"789        );790        let item = <NftItemList<T>>::get(collection_id, item_id);791        Self::remove_token_index(collection_id, item_id, item.owner.clone())?;792793        // remove approve list794        <ApprovedList<T>>::remove(collection_id, (item_id, item.owner.clone()));795796        // update balance797        let new_balance = <Balance<T>>::get(collection_id, item.owner.clone())798            .checked_sub(1)799            .unwrap();800        <Balance<T>>::insert(collection_id, item.owner.clone(), new_balance);801        <NftItemList<T>>::remove(collection_id, item_id);802803        Ok(())804    }805806    fn burn_fungible_item(collection_id: u64, item_id: u64) -> DispatchResult {807        ensure!(808            <FungibleItemList<T>>::contains_key(collection_id, item_id),809            "Item does not exists"810        );811        let item = <FungibleItemList<T>>::get(collection_id, item_id);812        Self::remove_token_index(collection_id, item_id, item.owner.clone())?;813814        // remove approve list815        <ApprovedList<T>>::remove(collection_id, (item_id, item.owner.clone()));816817        // update balance818        let new_balance = <Balance<T>>::get(collection_id, item.owner.clone())819            .checked_sub(item.value as u64)820            .unwrap();821        <Balance<T>>::insert(collection_id, item.owner.clone(), new_balance);822823        <FungibleItemList<T>>::remove(collection_id, item_id);824825        Ok(())826    }827828    fn collection_exists(collection_id: u64) -> DispatchResult {829        ensure!(830            <Collection<T>>::contains_key(collection_id),831            "This collection does not exist"832        );833        Ok(())834    }835836    fn check_owner_permissions(collection_id: u64, subject: T::AccountId) -> DispatchResult {837        Self::collection_exists(collection_id)?;838839        let target_collection = <Collection<T>>::get(collection_id);840        ensure!(841            subject == target_collection.owner,842            "You do not own this collection"843        );844845        Ok(())846    }847848    fn is_owner_or_admin_permissions(collection_id: u64, subject: T::AccountId) -> bool {849850        let target_collection = <Collection<T>>::get(collection_id);851        let mut result: bool = subject == target_collection.owner;852        let exists = <AdminList<T>>::contains_key(collection_id);853854        if !result & exists {855            if <AdminList<T>>::get(collection_id).contains(&subject) {856                result = true857            }858        }859860        result861    }862863    fn check_owner_or_admin_permissions(collection_id: u64, subject: T::AccountId) -> DispatchResult {864        865        Self::collection_exists(collection_id)?;866        let result = Self::is_owner_or_admin_permissions(collection_id, subject.clone());867868        ensure!(result, "You do not have permissions to modify this collection");869        Ok(())870    }871872    fn is_item_owner(subject: T::AccountId, collection_id: u64, item_id: u64) -> bool {873        let target_collection = <Collection<T>>::get(collection_id);874875        match target_collection.mode {876            CollectionMode::NFT(_) => {877                <NftItemList<T>>::get(collection_id, item_id).owner == subject878            }879            CollectionMode::Fungible(_) => {880                <FungibleItemList<T>>::get(collection_id, item_id).owner == subject881            }882            CollectionMode::ReFungible(_, _) => {883                <ReFungibleItemList<T>>::get(collection_id, item_id)884                    .owner885                    .iter()886                    .any(|i| i.owner == subject)887            }888            CollectionMode::Invalid => false,889        }890    }891892    fn check_white_list(collection_id: u64, address: T::AccountId) -> DispatchResult {893894        let mes = "Address is not in white list";895        ensure!(<WhiteList<T>>::contains_key(collection_id), mes);896        let wl = <WhiteList<T>>::get(collection_id);897        ensure!(wl.contains(&address.clone()), mes);898899        Ok(())900    }901902    fn transfer_fungible(903        collection_id: u64,904        item_id: u64,905        value: u64,906        owner: T::AccountId,907        new_owner: T::AccountId,908    ) -> DispatchResult {909910        ensure!(911            <FungibleItemList<T>>::contains_key(collection_id, item_id),912            "Item not exists"913        );914915        let full_item = <FungibleItemList<T>>::get(collection_id, item_id);916        let amount = full_item.value;917918        ensure!(amount >= value.into(), "Item balance not enouth");919920        // update balance921        let balance_old_owner = <Balance<T>>::get(collection_id, owner.clone())922            .checked_sub(value)923            .unwrap();924        <Balance<T>>::insert(collection_id, owner.clone(), balance_old_owner);925926        let mut new_owner_account_id = 0;927        let new_owner_items = <AddressTokens<T>>::get(collection_id, new_owner.clone());928        if new_owner_items.len() > 0 {929            new_owner_account_id = new_owner_items[0];930        }931932        let val64 = value.into();933934        // transfer935        if amount == val64 && new_owner_account_id == 0 {936            // change owner937            // new owner do not have account938            let mut new_full_item = full_item.clone();939            new_full_item.owner = new_owner.clone();940            <FungibleItemList<T>>::insert(collection_id, item_id, new_full_item);941942            // update balance943            let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.clone())944                .checked_add(value)945                .unwrap();946            <Balance<T>>::insert(collection_id, new_owner.clone(), balance_new_owner);947948            // update index collection949            Self::move_token_index(collection_id, item_id, owner.clone(), new_owner.clone())?;950        } else {951            let mut new_full_item = full_item.clone();952            new_full_item.value -= val64;953954            // separate amount955            if new_owner_account_id > 0 {956                // new owner has account957                let mut item = <FungibleItemList<T>>::get(collection_id, new_owner_account_id);958                item.value += val64;959960                // update balance961                let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.clone())962                    .checked_add(value)963                    .unwrap();964                <Balance<T>>::insert(collection_id, new_owner.clone(), balance_new_owner);965966                <FungibleItemList<T>>::insert(collection_id, new_owner_account_id, item);967            } else {968                // new owner do not have account969                let item = FungibleItemType {970                    collection: collection_id,971                    owner: new_owner.clone(),972                    value: val64,973                };974975                Self::add_fungible_item(item)?;976            }977978            if amount == val64 {979                Self::remove_token_index(collection_id, item_id, full_item.owner.clone())?;980981                // remove approve list982                <ApprovedList<T>>::remove(collection_id, (item_id, full_item.owner.clone()));983                <FungibleItemList<T>>::remove(collection_id, item_id);984            }985986            <FungibleItemList<T>>::insert(collection_id, item_id, new_full_item);987        }988989        Ok(())990    }991992    fn transfer_refungible(993        collection_id: u64,994        item_id: u64,995        value: u64,996        owner: T::AccountId,997        new_owner: T::AccountId,998    ) -> DispatchResult {9991000        ensure!(1001            <ReFungibleItemList<T>>::contains_key(collection_id, item_id),1002            "Item not exists"1003        );10041005        let full_item = <ReFungibleItemList<T>>::get(collection_id, item_id);1006        let item = full_item1007            .owner1008            .iter()1009            .filter(|i| i.owner == owner)1010            .next()1011            .unwrap();1012        let amount = item.fraction;10131014        ensure!(amount >= value.into(), "Item balance not enouth");10151016        // update balance1017        let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.clone())1018            .checked_sub(value)1019            .unwrap();1020        <Balance<T>>::insert(collection_id, item.owner.clone(), balance_old_owner);10211022        let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.clone())1023            .checked_add(value)1024            .unwrap();1025        <Balance<T>>::insert(collection_id, new_owner.clone(), balance_new_owner);10261027        let old_owner = item.owner.clone();1028        let new_owner_has_account = full_item.owner.iter().any(|i| i.owner == new_owner);1029        let val64 = value.into();10301031        // transfer1032        if amount == val64 && !new_owner_has_account {1033            // change owner1034            // new owner do not have account1035            let mut new_full_item = full_item.clone();1036            new_full_item1037                .owner1038                .iter_mut()1039                .find(|i| i.owner == owner)1040                .unwrap()1041                .owner = new_owner.clone();1042            <ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);10431044            // update index collection1045            Self::move_token_index(collection_id, item_id, old_owner.clone(), new_owner.clone())?;1046        } else {1047            let mut new_full_item = full_item.clone();1048            new_full_item1049                .owner1050                .iter_mut()1051                .find(|i| i.owner == owner)1052                .unwrap()1053                .fraction -= val64;10541055            // separate amount1056            if new_owner_has_account {1057                // new owner has account1058                new_full_item1059                    .owner1060                    .iter_mut()1061                    .find(|i| i.owner == new_owner)1062                    .unwrap()1063                    .fraction += val64;1064            } else {1065                // new owner do not have account1066                new_full_item.owner.push(Ownership {1067                    owner: new_owner.clone(),1068                    fraction: val64,1069                });1070                Self::add_token_index(collection_id, item_id, new_owner.clone())?;1071            }10721073            <ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);1074        }10751076        Ok(())1077    }10781079    fn transfer_nft(1080        collection_id: u64,1081        item_id: u64,1082        sender: T::AccountId,1083        new_owner: T::AccountId,1084    ) -> DispatchResult {1085    1086        ensure!(1087            <NftItemList<T>>::contains_key(collection_id, item_id),1088            "Item not exists"1089        );10901091        let mut item = <NftItemList<T>>::get(collection_id, item_id);10921093        ensure!(1094            sender == item.owner,1095            "sender parameter and item owner must be equal"1096        );10971098        // update balance1099        let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.clone())1100            .checked_sub(1)1101            .unwrap();1102        <Balance<T>>::insert(collection_id, item.owner.clone(), balance_old_owner);11031104        let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.clone())1105            .checked_add(1)1106            .unwrap();1107        <Balance<T>>::insert(collection_id, new_owner.clone(), balance_new_owner);11081109        // change owner1110        let old_owner = item.owner.clone();1111        item.owner = new_owner.clone();1112        <NftItemList<T>>::insert(collection_id, item_id, item);11131114        // update index collection1115        Self::move_token_index(collection_id, item_id, old_owner.clone(), new_owner.clone())?;11161117        // reset approved list1118        <ApprovedList<T>>::remove(collection_id, (item_id, old_owner));1119        Ok(())1120    }11211122    fn add_token_index(collection_id: u64, item_index: u64, owner: T::AccountId) -> DispatchResult {1123        let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner.clone());1124        if list_exists {1125            let mut list = <AddressTokens<T>>::get(collection_id, owner.clone());1126            let item_contains = list.contains(&item_index.clone());11271128            if !item_contains {1129                list.push(item_index.clone());1130            }11311132            <AddressTokens<T>>::insert(collection_id, owner.clone(), list);1133        } else {1134            let mut itm = Vec::new();1135            itm.push(item_index.clone());1136            <AddressTokens<T>>::insert(collection_id, owner, itm);1137        }11381139        Ok(())1140    }11411142    fn remove_token_index(1143        collection_id: u64,1144        item_index: u64,1145        owner: T::AccountId,1146    ) -> DispatchResult {1147        let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner.clone());1148        if list_exists {1149            let mut list = <AddressTokens<T>>::get(collection_id, owner.clone());1150            let item_contains = list.contains(&item_index.clone());11511152            if item_contains {1153                list.retain(|&item| item != item_index);1154                <AddressTokens<T>>::insert(collection_id, owner, list);1155            }1156        }11571158        Ok(())1159    }11601161    fn move_token_index(1162        collection_id: u64,1163        item_index: u64,1164        old_owner: T::AccountId,1165        new_owner: T::AccountId,1166    ) -> DispatchResult {1167        Self::remove_token_index(collection_id, item_index, old_owner)?;1168        Self::add_token_index(collection_id, item_index, new_owner)?;11691170        Ok(())1171    }1172}11731174////////////////////////////////////////////////////////////////////////////////////////////////////1175// Economic models11761177/// Fee multiplier.1178pub type Multiplier = FixedU128;11791180type BalanceOf<T> = <<T as transaction_payment::Trait>::Currency as Currency<1181    <T as system::Trait>::AccountId,1182>>::Balance;1183type NegativeImbalanceOf<T> = <<T as transaction_payment::Trait>::Currency as Currency<1184    <T as system::Trait>::AccountId,1185>>::NegativeImbalance;11861187/// Require the transactor pay for themselves and maybe include a tip to gain additional priority1188/// in the queue.1189#[derive(Encode, Decode, Clone, Eq, PartialEq)]1190pub struct ChargeTransactionPayment<T: transaction_payment::Trait + Send + Sync>(1191    #[codec(compact)] BalanceOf<T>,1192);11931194impl<T: Trait + transaction_payment::Trait + Send + Sync> sp_std::fmt::Debug1195    for ChargeTransactionPayment<T>1196{1197    #[cfg(feature = "std")]1198    fn fmt(&self, f: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {1199        write!(f, "ChargeTransactionPayment<{:?}>", self.0)1200    }1201    #[cfg(not(feature = "std"))]1202    fn fmt(&self, _: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {1203        Ok(())1204    }1205}12061207impl<T: Trait + transaction_payment::Trait + Send + Sync> ChargeTransactionPayment<T>1208where1209    T::Call:1210        Dispatchable<Info = DispatchInfo, PostInfo = PostDispatchInfo> + IsSubType<Module<T>, T>,1211    BalanceOf<T>: Send + Sync + FixedPointOperand,1212{1213    /// utility constructor. Used only in client/factory code.1214    pub fn from(fee: BalanceOf<T>) -> Self {1215        Self(fee)1216    }12171218    pub fn traditional_fee(1219        len: usize,1220        info: &DispatchInfoOf<T::Call>,1221        tip: BalanceOf<T>,1222    ) -> BalanceOf<T>1223    where1224        T::Call: Dispatchable<Info = DispatchInfo>,1225    {1226        <transaction_payment::Module<T>>::compute_fee(len as u32, info, tip)1227    }12281229    fn withdraw_fee(1230        &self,1231        who: &T::AccountId,1232        call: &T::Call,1233        info: &DispatchInfoOf<T::Call>,1234        len: usize,1235    ) -> Result<(BalanceOf<T>, Option<NegativeImbalanceOf<T>>), TransactionValidityError> {1236        let tip = self.0;12371238        // Set fee based on call type. Creating collection costs 1 Unique.1239        // All other transactions have traditional fees so far1240        let fee = match call.is_sub_type() {1241            Some(Call::create_collection(..)) => <BalanceOf<T>>::from(1_000_000_000),1242            _ => Self::traditional_fee(len, info, tip), // Flat fee model, use only for testing purposes1243                                                        // _ => <BalanceOf<T>>::from(100)1244        };12451246        // Determine who is paying transaction fee based on ecnomic model1247        // Parse call to extract collection ID and access collection sponsor1248        let sponsor: T::AccountId = match call.is_sub_type() {1249            Some(Call::create_item(collection_id, _properties, _owner)) => {1250                <Collection<T>>::get(collection_id).sponsor1251            }1252            Some(Call::transfer(_new_owner, collection_id, _item_id, _value)) => {1253                <Collection<T>>::get(collection_id).sponsor1254            }12551256            _ => T::AccountId::default(),1257        };12581259        let mut who_pays_fee: T::AccountId = sponsor.clone();1260        if sponsor == T::AccountId::default() {1261            who_pays_fee = who.clone();1262        }12631264        // Only mess with balances if fee is not zero.1265        if fee.is_zero() {1266            return Ok((fee, None));1267        }12681269        match <T as transaction_payment::Trait>::Currency::withdraw(1270            &who_pays_fee,1271            fee,1272            if tip.is_zero() {1273                WithdrawReason::TransactionPayment.into()1274            } else {1275                WithdrawReason::TransactionPayment | WithdrawReason::Tip1276            },1277            ExistenceRequirement::KeepAlive,1278        ) {1279            Ok(imbalance) => Ok((fee, Some(imbalance))),1280            Err(_) => Err(InvalidTransaction::Payment.into()),1281        }1282    }1283}12841285impl<T: Trait + transaction_payment::Trait + Send + Sync> SignedExtension1286    for ChargeTransactionPayment<T>1287where1288    BalanceOf<T>: Send + Sync + From<u64> + FixedPointOperand,1289    T::Call:1290        Dispatchable<Info = DispatchInfo, PostInfo = PostDispatchInfo> + IsSubType<Module<T>, T>,1291{1292    const IDENTIFIER: &'static str = "ChargeTransactionPayment";1293    type AccountId = T::AccountId;1294    type Call = T::Call;1295    type AdditionalSigned = ();1296    type Pre = (1297        BalanceOf<T>,1298        Self::AccountId,1299        Option<NegativeImbalanceOf<T>>,1300        BalanceOf<T>,1301    );1302    fn additional_signed(&self) -> sp_std::result::Result<(), TransactionValidityError> {1303        Ok(())1304    }13051306    fn validate(1307        &self,1308        who: &Self::AccountId,1309        call: &Self::Call,1310        info: &DispatchInfoOf<Self::Call>,1311        len: usize,1312    ) -> TransactionValidity {1313        let (fee, _) = self.withdraw_fee(who, call, info, len)?;13141315        let mut r = ValidTransaction::default();1316        // NOTE: we probably want to maximize the _fee (of any type) per weight unit_ here, which1317        // will be a bit more than setting the priority to tip. For now, this is enough.1318        r.priority = fee.saturated_into::<TransactionPriority>();1319        Ok(r)1320    }13211322    fn pre_dispatch(1323        self,1324        who: &Self::AccountId,1325        call: &Self::Call,1326        info: &DispatchInfoOf<Self::Call>,1327        len: usize,1328    ) -> Result<Self::Pre, TransactionValidityError> {1329        let (fee, imbalance) = self.withdraw_fee(who, call, info, len)?;1330        Ok((self.0, who.clone(), imbalance, fee))1331    }13321333    fn post_dispatch(1334        pre: Self::Pre,1335        info: &DispatchInfoOf<Self::Call>,1336        post_info: &PostDispatchInfoOf<Self::Call>,1337        len: usize,1338        _result: &DispatchResult,1339    ) -> Result<(), TransactionValidityError> {1340        let (tip, who, imbalance, fee) = pre;1341        if let Some(payed) = imbalance {1342            let actual_fee = <transaction_payment::Module<T>>::compute_actual_fee(1343                len as u32, info, post_info, tip,1344            );1345            let refund = fee.saturating_sub(actual_fee);1346            let actual_payment =1347                match <T as transaction_payment::Trait>::Currency::deposit_into_existing(1348                    &who, refund,1349                ) {1350                    Ok(refund_imbalance) => {1351                        // The refund cannot be larger than the up front payed max weight.1352                        // `PostDispatchInfo::calc_unspent` guards against such a case.1353                        match payed.offset(refund_imbalance) {1354                            Ok(actual_payment) => actual_payment,1355                            Err(_) => return Err(InvalidTransaction::Payment.into()),1356                        }1357                    }1358                    // We do not recreate the account using the refund. The up front payment1359                    // is gone in that case.1360                    Err(_) => payed,1361                };1362            let imbalances = actual_payment.split(tip);1363            <T as transaction_payment::Trait>::OnTransactionPayment::on_unbalanceds(1364                Some(imbalances.0).into_iter().chain(Some(imbalances.1)),1365            );1366        }1367        Ok(())1368    }1369}