git.delta.rocks / unique-network / refs/commits / 3f41342b2bd0

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.clone(),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.clone(), fraction: value});520521                    let item = ReFungibleItemType {522                        collection: collection_id,523                        owner: owner_list,524                        data: properties.clone()525                    };526527                    Self::add_refungible_item(item)?;528                },529                _ => { ensure!(1 == 0,"just error"); }530531            };532533            // call event534            Self::deposit_event(RawEvent::ItemCreated(collection_id, <ItemListIndex>::get(collection_id)));535536            Ok(())537        }538539        #[weight = 0]540        pub fn burn_item(origin, collection_id: u64, item_id: u64) -> DispatchResult {541542            let sender = ensure_signed(origin)?;543            Self::collection_exists(collection_id)?;544            let item_owner = Self::is_item_owner(sender.clone(), collection_id, item_id);545            if !item_owner546            {547                if !Self::is_owner_or_admin_permissions(collection_id, sender.clone()) {  548                    Self::check_white_list(collection_id, sender.clone())?;549                }550            }551            let target_collection = <Collection<T>>::get(collection_id);552553            match target_collection.mode554            {555                CollectionMode::NFT(_) => Self::burn_nft_item(collection_id, item_id)?,556                CollectionMode::Fungible(_)  => Self::burn_fungible_item(collection_id, item_id)?,557                CollectionMode::ReFungible(_, _)  => Self::burn_refungible_item(collection_id, item_id, sender.clone())?,558                _ => ()559            };560561            // call event562            Self::deposit_event(RawEvent::ItemDestroyed(collection_id, item_id));563564            Ok(())565        }566567        #[weight = 0]568        pub fn transfer(origin, recipient: T::AccountId, collection_id: u64, item_id: u64, value: u64) -> DispatchResult {569570            let sender = ensure_signed(origin)?;571            Self::check_white_list(collection_id, sender.clone())?;572            Self::check_white_list(collection_id, recipient.clone())?;573            let target_collection = <Collection<T>>::get(collection_id);574575            match target_collection.mode576            {577                CollectionMode::NFT(_) => Self::transfer_nft(collection_id, item_id, sender.clone(), recipient)?,578                CollectionMode::Fungible(_)  => Self::transfer_fungible(collection_id, item_id, value, sender.clone(), recipient)?,579                CollectionMode::ReFungible(_, _)  => Self::transfer_refungible(collection_id, item_id, value, sender.clone(), recipient)?,580                _ => ()581            };582583            Ok(())584        }585586        #[weight = 0]587        pub fn approve(origin, approved: T::AccountId, collection_id: u64, item_id: u64) -> DispatchResult {588589            let sender = ensure_signed(origin)?;590591            // amount param stub592            let amount = 100000000;593594            let item_owner = Self::is_item_owner(sender.clone(), collection_id, item_id);595            if !item_owner {596                Self::check_white_list(collection_id, approved.clone())?;597            }598599            let list_exists = <ApprovedList<T>>::contains_key(collection_id, (item_id, sender.clone()));600            if list_exists {601602                let mut list = <ApprovedList<T>>::get(collection_id, (item_id, sender.clone()));603                let item_contains = list.iter().any(|i| i.approved == approved);604605                if !item_contains {606                    list.push(ApprovePermissions { approved: approved.clone(), amount: amount });607                    <ApprovedList<T>>::insert(collection_id, (item_id, sender.clone()), list);608                }609            } else {610611                let mut list = Vec::new();612                list.push(ApprovePermissions { approved: approved.clone(), amount: amount });613                <ApprovedList<T>>::insert(collection_id, (item_id, sender.clone()), list);614            }615616            Ok(())617        }618619        #[weight = 0]620        pub fn transfer_from(origin, from: T::AccountId, recipient: T::AccountId, collection_id: u64, item_id: u64, value: u64 ) -> DispatchResult {621622            let sender = ensure_signed(origin)?;623            let approved_list_exists = <ApprovedList<T>>::contains_key(collection_id, (item_id, from.clone()));624625            ensure!(approved_list_exists, "Only approved addresses can call this method");626627            Self::check_white_list(collection_id, from.clone())?;628            Self::check_white_list(collection_id, recipient.clone())?;629630            let list_itm = <ApprovedList<T>>::get(collection_id, (item_id, from.clone()));631            let opt_item = list_itm.iter().find(|i| i.approved == sender.clone());632            ensure!(opt_item.is_some(), "No approve found");633            ensure!(opt_item.unwrap().amount >= value, "Requested value more than approved");634635            // remove approve636            let approve_list: Vec<ApprovePermissions<T::AccountId>> = <ApprovedList<T>>::get(collection_id, (item_id, from.clone()))637                .into_iter().filter(|i| i.approved != sender.clone()).collect();638            <ApprovedList<T>>::insert(collection_id, (item_id, from.clone()), approve_list);639640            let target_collection = <Collection<T>>::get(collection_id);641642            match target_collection.mode643            {644                CollectionMode::NFT(_) => Self::transfer_nft(collection_id, item_id, from, recipient)?,645                CollectionMode::Fungible(_)  => Self::transfer_fungible(collection_id, item_id, value, from.clone(), recipient)?,646                CollectionMode::ReFungible(_, _)  => Self::transfer_refungible(collection_id, item_id, value, from.clone(), recipient)?,647                _ => ()648            };649650            Ok(())651        }652653        #[weight = 0]654        pub fn safe_transfer_from(origin, collection_id: u64, item_id: u64, new_owner: T::AccountId) -> DispatchResult {655656            // let no_perm_mes = "You do not have permissions to modify this collection";657            // ensure!(<ApprovedList<T>>::contains_key((collection_id, item_id)), no_perm_mes);658            // let list_itm = <ApprovedList<T>>::get((collection_id, item_id));659            // ensure!(list_itm.contains(&new_owner.clone()), no_perm_mes);660661            // // on_nft_received  call662663            // Self::transfer(origin, collection_id, item_id, new_owner)?;664665            Ok(())666        }667668        #[weight = 0]669        pub fn set_offchain_schema(670            origin,671            collection_id: u64,672            schema: Vec<u8>673        ) -> DispatchResult {674            let sender = ensure_signed(origin)?;675            Self::check_owner_or_admin_permissions(collection_id, sender.clone())?;676677            let mut target_collection = <Collection<T>>::get(collection_id);678            target_collection.offchain_schema = schema;679            <Collection<T>>::insert(collection_id, target_collection);680681            Ok(())682        }683    }684}685686impl<T: Trait> Module<T> {687    fn add_fungible_item(item: FungibleItemType<T::AccountId>) -> DispatchResult {688        let current_index = <ItemListIndex>::get(item.collection)689            .checked_add(1)690            .expect("Item list index id error");691        let itemcopy = item.clone();692        let owner = item.owner.clone();693        let value = item.value as u64;694695        Self::add_token_index(item.collection, current_index, owner.clone())?;696697        <ItemListIndex>::insert(item.collection, current_index);698        <FungibleItemList<T>>::insert(item.collection, current_index, itemcopy);699700        // Update balance701        let new_balance = <Balance<T>>::get(item.collection, owner.clone())702            .checked_add(value)703            .unwrap();704        <Balance<T>>::insert(item.collection, owner.clone(), new_balance);705706        Ok(())707    }708709    fn add_refungible_item(item: ReFungibleItemType<T::AccountId>) -> DispatchResult {710        let current_index = <ItemListIndex>::get(item.collection)711            .checked_add(1)712            .expect("Item list index id error");713        let itemcopy = item.clone();714715        let value = item.owner.first().unwrap().fraction as u64;716        let owner = item.owner.first().unwrap().owner.clone();717718        Self::add_token_index(item.collection, current_index, owner.clone())?;719720        <ItemListIndex>::insert(item.collection, current_index);721        <ReFungibleItemList<T>>::insert(item.collection, current_index, itemcopy);722723        // Update balance724        let new_balance = <Balance<T>>::get(item.collection, owner.clone())725            .checked_add(value)726            .unwrap();727        <Balance<T>>::insert(item.collection, owner.clone(), new_balance);728729        Ok(())730    }731732    fn add_nft_item(item: NftItemType<T::AccountId>) -> DispatchResult {733        let current_index = <ItemListIndex>::get(item.collection)734            .checked_add(1)735            .expect("Item list index id error");736737        let item_owner = item.owner.clone();738        let collection_id = item.collection.clone();739        Self::add_token_index(collection_id, current_index, item.owner.clone())?;740741        <ItemListIndex>::insert(collection_id, current_index);742        <NftItemList<T>>::insert(collection_id, current_index, item);743744        // Update balance745        let new_balance = <Balance<T>>::get(collection_id, item_owner.clone())746            .checked_add(1)747            .unwrap();748        <Balance<T>>::insert(collection_id, item_owner.clone(), new_balance);749750        Ok(())751    }752753    fn burn_refungible_item(collection_id: u64, item_id: u64, owner: T::AccountId) -> DispatchResult {754        ensure!(755            <ReFungibleItemList<T>>::contains_key(collection_id, item_id),756            "Item does not exists"757        );758        let collection = <ReFungibleItemList<T>>::get(collection_id, item_id);759        let item = collection760            .owner761            .iter()762            .filter(|&i| i.owner == owner)763            .next()764            .unwrap();765        Self::remove_token_index(collection_id, item_id, owner.clone())?;766767        // remove approve list768        <ApprovedList<T>>::remove(collection_id, (item_id, owner.clone()));769770        // update balance771        let new_balance = <Balance<T>>::get(collection_id, item.owner.clone())772            .checked_sub(item.fraction as u64)773            .unwrap();774        <Balance<T>>::insert(collection_id, item.owner.clone(), new_balance);775776        <ReFungibleItemList<T>>::remove(collection_id, item_id);777778        Ok(())779    }780781    fn burn_nft_item(collection_id: u64, item_id: u64) -> DispatchResult {782        ensure!(783            <NftItemList<T>>::contains_key(collection_id, item_id),784            "Item does not exists"785        );786        let item = <NftItemList<T>>::get(collection_id, item_id);787        Self::remove_token_index(collection_id, item_id, item.owner.clone())?;788789        // remove approve list790        <ApprovedList<T>>::remove(collection_id, (item_id, item.owner.clone()));791792        // update balance793        let new_balance = <Balance<T>>::get(collection_id, item.owner.clone())794            .checked_sub(1)795            .unwrap();796        <Balance<T>>::insert(collection_id, item.owner.clone(), new_balance);797        <NftItemList<T>>::remove(collection_id, item_id);798799        Ok(())800    }801802    fn burn_fungible_item(collection_id: u64, item_id: u64) -> DispatchResult {803        ensure!(804            <FungibleItemList<T>>::contains_key(collection_id, item_id),805            "Item does not exists"806        );807        let item = <FungibleItemList<T>>::get(collection_id, item_id);808        Self::remove_token_index(collection_id, item_id, item.owner.clone())?;809810        // remove approve list811        <ApprovedList<T>>::remove(collection_id, (item_id, item.owner.clone()));812813        // update balance814        let new_balance = <Balance<T>>::get(collection_id, item.owner.clone())815            .checked_sub(item.value as u64)816            .unwrap();817        <Balance<T>>::insert(collection_id, item.owner.clone(), new_balance);818819        <FungibleItemList<T>>::remove(collection_id, item_id);820821        Ok(())822    }823824    fn collection_exists(collection_id: u64) -> DispatchResult {825        ensure!(826            <Collection<T>>::contains_key(collection_id),827            "This collection does not exist"828        );829        Ok(())830    }831832    fn check_owner_permissions(collection_id: u64, subject: T::AccountId) -> DispatchResult {833        Self::collection_exists(collection_id)?;834835        let target_collection = <Collection<T>>::get(collection_id);836        ensure!(837            subject == target_collection.owner,838            "You do not own this collection"839        );840841        Ok(())842    }843844    fn is_owner_or_admin_permissions(collection_id: u64, subject: T::AccountId) -> bool {845846        let target_collection = <Collection<T>>::get(collection_id);847        let mut result: bool = subject == target_collection.owner;848        let exists = <AdminList<T>>::contains_key(collection_id);849850        if !result & exists {851            if <AdminList<T>>::get(collection_id).contains(&subject) {852                result = true853            }854        }855856        result857    }858859    fn check_owner_or_admin_permissions(collection_id: u64, subject: T::AccountId) -> DispatchResult {860        861        Self::collection_exists(collection_id)?;862        let result = Self::is_owner_or_admin_permissions(collection_id, subject.clone());863864        ensure!(result, "You do not have permissions to modify this collection");865        Ok(())866    }867868    fn is_item_owner(subject: T::AccountId, collection_id: u64, item_id: u64) -> bool {869        let target_collection = <Collection<T>>::get(collection_id);870871        match target_collection.mode {872            CollectionMode::NFT(_) => {873                <NftItemList<T>>::get(collection_id, item_id).owner == subject874            }875            CollectionMode::Fungible(_) => {876                <FungibleItemList<T>>::get(collection_id, item_id).owner == subject877            }878            CollectionMode::ReFungible(_, _) => {879                <ReFungibleItemList<T>>::get(collection_id, item_id)880                    .owner881                    .iter()882                    .any(|i| i.owner == subject)883            }884            CollectionMode::Invalid => false,885        }886    }887888    fn check_white_list(collection_id: u64, address: T::AccountId) -> DispatchResult {889890        let mes = "Address is not in white list";891        ensure!(<WhiteList<T>>::contains_key(collection_id), mes);892        let wl = <WhiteList<T>>::get(collection_id);893        ensure!(wl.contains(&address.clone()), mes);894895        Ok(())896    }897898    fn transfer_fungible(899        collection_id: u64,900        item_id: u64,901        value: u64,902        owner: T::AccountId,903        new_owner: T::AccountId,904    ) -> DispatchResult {905906        ensure!(907            <FungibleItemList<T>>::contains_key(collection_id, item_id),908            "Item not exists"909        );910911        let full_item = <FungibleItemList<T>>::get(collection_id, item_id);912        let amount = full_item.value;913914        ensure!(amount >= value.into(), "Item balance not enouth");915916        // update balance917        let balance_old_owner = <Balance<T>>::get(collection_id, owner.clone())918            .checked_sub(value)919            .unwrap();920        <Balance<T>>::insert(collection_id, owner.clone(), balance_old_owner);921922        let mut new_owner_account_id = 0;923        let new_owner_items = <AddressTokens<T>>::get(collection_id, new_owner.clone());924        if new_owner_items.len() > 0 {925            new_owner_account_id = new_owner_items[0];926        }927928        let val64 = value.into();929930        // transfer931        if amount == val64 && new_owner_account_id == 0 {932            // change owner933            // new owner do not have account934            let mut new_full_item = full_item.clone();935            new_full_item.owner = new_owner.clone();936            <FungibleItemList<T>>::insert(collection_id, item_id, new_full_item);937938            // update balance939            let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.clone())940                .checked_add(value)941                .unwrap();942            <Balance<T>>::insert(collection_id, new_owner.clone(), balance_new_owner);943944            // update index collection945            Self::move_token_index(collection_id, item_id, owner.clone(), new_owner.clone())?;946        } else {947            let mut new_full_item = full_item.clone();948            new_full_item.value -= val64;949950            // separate amount951            if new_owner_account_id > 0 {952                // new owner has account953                let mut item = <FungibleItemList<T>>::get(collection_id, new_owner_account_id);954                item.value += val64;955956                // update balance957                let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.clone())958                    .checked_add(value)959                    .unwrap();960                <Balance<T>>::insert(collection_id, new_owner.clone(), balance_new_owner);961962                <FungibleItemList<T>>::insert(collection_id, new_owner_account_id, item);963            } else {964                // new owner do not have account965                let item = FungibleItemType {966                    collection: collection_id,967                    owner: new_owner.clone(),968                    value: val64,969                };970971                Self::add_fungible_item(item)?;972            }973974            if amount == val64 {975                Self::remove_token_index(collection_id, item_id, full_item.owner.clone())?;976977                // remove approve list978                <ApprovedList<T>>::remove(collection_id, (item_id, full_item.owner.clone()));979                <FungibleItemList<T>>::remove(collection_id, item_id);980            }981982            <FungibleItemList<T>>::insert(collection_id, item_id, new_full_item);983        }984985        Ok(())986    }987988    fn transfer_refungible(989        collection_id: u64,990        item_id: u64,991        value: u64,992        owner: T::AccountId,993        new_owner: T::AccountId,994    ) -> DispatchResult {995996        ensure!(997            <ReFungibleItemList<T>>::contains_key(collection_id, item_id),998            "Item not exists"999        );10001001        let full_item = <ReFungibleItemList<T>>::get(collection_id, item_id);1002        let item = full_item1003            .owner1004            .iter()1005            .filter(|i| i.owner == owner)1006            .next()1007            .unwrap();1008        let amount = item.fraction;10091010        ensure!(amount >= value.into(), "Item balance not enouth");10111012        // update balance1013        let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.clone())1014            .checked_sub(value)1015            .unwrap();1016        <Balance<T>>::insert(collection_id, item.owner.clone(), balance_old_owner);10171018        let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.clone())1019            .checked_add(value)1020            .unwrap();1021        <Balance<T>>::insert(collection_id, new_owner.clone(), balance_new_owner);10221023        let old_owner = item.owner.clone();1024        let new_owner_has_account = full_item.owner.iter().any(|i| i.owner == new_owner);1025        let val64 = value.into();10261027        // transfer1028        if amount == val64 && !new_owner_has_account {1029            // change owner1030            // new owner do not have account1031            let mut new_full_item = full_item.clone();1032            new_full_item1033                .owner1034                .iter_mut()1035                .find(|i| i.owner == owner)1036                .unwrap()1037                .owner = new_owner.clone();1038            <ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);10391040            // update index collection1041            Self::move_token_index(collection_id, item_id, old_owner.clone(), new_owner.clone())?;1042        } else {1043            let mut new_full_item = full_item.clone();1044            new_full_item1045                .owner1046                .iter_mut()1047                .find(|i| i.owner == owner)1048                .unwrap()1049                .fraction -= val64;10501051            // separate amount1052            if new_owner_has_account {1053                // new owner has account1054                new_full_item1055                    .owner1056                    .iter_mut()1057                    .find(|i| i.owner == new_owner)1058                    .unwrap()1059                    .fraction += val64;1060            } else {1061                // new owner do not have account1062                new_full_item.owner.push(Ownership {1063                    owner: new_owner.clone(),1064                    fraction: val64,1065                });1066                Self::add_token_index(collection_id, item_id, new_owner.clone())?;1067            }10681069            <ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);1070        }10711072        Ok(())1073    }10741075    fn transfer_nft(1076        collection_id: u64,1077        item_id: u64,1078        sender: T::AccountId,1079        new_owner: T::AccountId,1080    ) -> DispatchResult {1081    1082        ensure!(1083            <NftItemList<T>>::contains_key(collection_id, item_id),1084            "Item not exists"1085        );10861087        let mut item = <NftItemList<T>>::get(collection_id, item_id);10881089        ensure!(1090            sender == item.owner,1091            "sender parameter and item owner must be equal"1092        );10931094        // update balance1095        let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.clone())1096            .checked_sub(1)1097            .unwrap();1098        <Balance<T>>::insert(collection_id, item.owner.clone(), balance_old_owner);10991100        let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.clone())1101            .checked_add(1)1102            .unwrap();1103        <Balance<T>>::insert(collection_id, new_owner.clone(), balance_new_owner);11041105        // change owner1106        let old_owner = item.owner.clone();1107        item.owner = new_owner.clone();1108        <NftItemList<T>>::insert(collection_id, item_id, item);11091110        // update index collection1111        Self::move_token_index(collection_id, item_id, old_owner.clone(), new_owner.clone())?;11121113        // reset approved list1114        <ApprovedList<T>>::remove(collection_id, (item_id, old_owner));1115        Ok(())1116    }11171118    fn add_token_index(collection_id: u64, item_index: u64, owner: T::AccountId) -> DispatchResult {1119        let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner.clone());1120        if list_exists {1121            let mut list = <AddressTokens<T>>::get(collection_id, owner.clone());1122            let item_contains = list.contains(&item_index.clone());11231124            if !item_contains {1125                list.push(item_index.clone());1126            }11271128            <AddressTokens<T>>::insert(collection_id, owner.clone(), list);1129        } else {1130            let mut itm = Vec::new();1131            itm.push(item_index.clone());1132            <AddressTokens<T>>::insert(collection_id, owner, itm);1133        }11341135        Ok(())1136    }11371138    fn remove_token_index(1139        collection_id: u64,1140        item_index: u64,1141        owner: T::AccountId,1142    ) -> DispatchResult {1143        let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner.clone());1144        if list_exists {1145            let mut list = <AddressTokens<T>>::get(collection_id, owner.clone());1146            let item_contains = list.contains(&item_index.clone());11471148            if item_contains {1149                list.retain(|&item| item != item_index);1150                <AddressTokens<T>>::insert(collection_id, owner, list);1151            }1152        }11531154        Ok(())1155    }11561157    fn move_token_index(1158        collection_id: u64,1159        item_index: u64,1160        old_owner: T::AccountId,1161        new_owner: T::AccountId,1162    ) -> DispatchResult {1163        Self::remove_token_index(collection_id, item_index, old_owner)?;1164        Self::add_token_index(collection_id, item_index, new_owner)?;11651166        Ok(())1167    }1168}11691170////////////////////////////////////////////////////////////////////////////////////////////////////1171// Economic models11721173/// Fee multiplier.1174pub type Multiplier = FixedU128;11751176type BalanceOf<T> = <<T as transaction_payment::Trait>::Currency as Currency<1177    <T as system::Trait>::AccountId,1178>>::Balance;1179type NegativeImbalanceOf<T> = <<T as transaction_payment::Trait>::Currency as Currency<1180    <T as system::Trait>::AccountId,1181>>::NegativeImbalance;11821183/// Require the transactor pay for themselves and maybe include a tip to gain additional priority1184/// in the queue.1185#[derive(Encode, Decode, Clone, Eq, PartialEq)]1186pub struct ChargeTransactionPayment<T: transaction_payment::Trait + Send + Sync>(1187    #[codec(compact)] BalanceOf<T>,1188);11891190impl<T: Trait + transaction_payment::Trait + Send + Sync> sp_std::fmt::Debug1191    for ChargeTransactionPayment<T>1192{1193    #[cfg(feature = "std")]1194    fn fmt(&self, f: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {1195        write!(f, "ChargeTransactionPayment<{:?}>", self.0)1196    }1197    #[cfg(not(feature = "std"))]1198    fn fmt(&self, _: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {1199        Ok(())1200    }1201}12021203impl<T: Trait + transaction_payment::Trait + Send + Sync> ChargeTransactionPayment<T>1204where1205    T::Call:1206        Dispatchable<Info = DispatchInfo, PostInfo = PostDispatchInfo> + IsSubType<Module<T>, T>,1207    BalanceOf<T>: Send + Sync + FixedPointOperand,1208{1209    /// utility constructor. Used only in client/factory code.1210    pub fn from(fee: BalanceOf<T>) -> Self {1211        Self(fee)1212    }12131214    pub fn traditional_fee(1215        len: usize,1216        info: &DispatchInfoOf<T::Call>,1217        tip: BalanceOf<T>,1218    ) -> BalanceOf<T>1219    where1220        T::Call: Dispatchable<Info = DispatchInfo>,1221    {1222        <transaction_payment::Module<T>>::compute_fee(len as u32, info, tip)1223    }12241225    fn withdraw_fee(1226        &self,1227        who: &T::AccountId,1228        call: &T::Call,1229        info: &DispatchInfoOf<T::Call>,1230        len: usize,1231    ) -> Result<(BalanceOf<T>, Option<NegativeImbalanceOf<T>>), TransactionValidityError> {1232        let tip = self.0;12331234        // Set fee based on call type. Creating collection costs 1 Unique.1235        // All other transactions have traditional fees so far1236        let fee = match call.is_sub_type() {1237            Some(Call::create_collection(..)) => <BalanceOf<T>>::from(1_000_000_000),1238            _ => Self::traditional_fee(len, info, tip), // Flat fee model, use only for testing purposes1239                                                        // _ => <BalanceOf<T>>::from(100)1240        };12411242        // Determine who is paying transaction fee based on ecnomic model1243        // Parse call to extract collection ID and access collection sponsor1244        let sponsor: T::AccountId = match call.is_sub_type() {1245            Some(Call::create_item(collection_id, _properties, _owner)) => {1246                <Collection<T>>::get(collection_id).sponsor1247            }1248            Some(Call::transfer(_new_owner, collection_id, _item_id, _value)) => {1249                <Collection<T>>::get(collection_id).sponsor1250            }12511252            _ => T::AccountId::default(),1253        };12541255        let mut who_pays_fee: T::AccountId = sponsor.clone();1256        if sponsor == T::AccountId::default() {1257            who_pays_fee = who.clone();1258        }12591260        // Only mess with balances if fee is not zero.1261        if fee.is_zero() {1262            return Ok((fee, None));1263        }12641265        match <T as transaction_payment::Trait>::Currency::withdraw(1266            &who_pays_fee,1267            fee,1268            if tip.is_zero() {1269                WithdrawReason::TransactionPayment.into()1270            } else {1271                WithdrawReason::TransactionPayment | WithdrawReason::Tip1272            },1273            ExistenceRequirement::KeepAlive,1274        ) {1275            Ok(imbalance) => Ok((fee, Some(imbalance))),1276            Err(_) => Err(InvalidTransaction::Payment.into()),1277        }1278    }1279}12801281impl<T: Trait + transaction_payment::Trait + Send + Sync> SignedExtension1282    for ChargeTransactionPayment<T>1283where1284    BalanceOf<T>: Send + Sync + From<u64> + FixedPointOperand,1285    T::Call:1286        Dispatchable<Info = DispatchInfo, PostInfo = PostDispatchInfo> + IsSubType<Module<T>, T>,1287{1288    const IDENTIFIER: &'static str = "ChargeTransactionPayment";1289    type AccountId = T::AccountId;1290    type Call = T::Call;1291    type AdditionalSigned = ();1292    type Pre = (1293        BalanceOf<T>,1294        Self::AccountId,1295        Option<NegativeImbalanceOf<T>>,1296        BalanceOf<T>,1297    );1298    fn additional_signed(&self) -> sp_std::result::Result<(), TransactionValidityError> {1299        Ok(())1300    }13011302    fn validate(1303        &self,1304        who: &Self::AccountId,1305        call: &Self::Call,1306        info: &DispatchInfoOf<Self::Call>,1307        len: usize,1308    ) -> TransactionValidity {1309        let (fee, _) = self.withdraw_fee(who, call, info, len)?;13101311        let mut r = ValidTransaction::default();1312        // NOTE: we probably want to maximize the _fee (of any type) per weight unit_ here, which1313        // will be a bit more than setting the priority to tip. For now, this is enough.1314        r.priority = fee.saturated_into::<TransactionPriority>();1315        Ok(r)1316    }13171318    fn pre_dispatch(1319        self,1320        who: &Self::AccountId,1321        call: &Self::Call,1322        info: &DispatchInfoOf<Self::Call>,1323        len: usize,1324    ) -> Result<Self::Pre, TransactionValidityError> {1325        let (fee, imbalance) = self.withdraw_fee(who, call, info, len)?;1326        Ok((self.0, who.clone(), imbalance, fee))1327    }13281329    fn post_dispatch(1330        pre: Self::Pre,1331        info: &DispatchInfoOf<Self::Call>,1332        post_info: &PostDispatchInfoOf<Self::Call>,1333        len: usize,1334        _result: &DispatchResult,1335    ) -> Result<(), TransactionValidityError> {1336        let (tip, who, imbalance, fee) = pre;1337        if let Some(payed) = imbalance {1338            let actual_fee = <transaction_payment::Module<T>>::compute_actual_fee(1339                len as u32, info, post_info, tip,1340            );1341            let refund = fee.saturating_sub(actual_fee);1342            let actual_payment =1343                match <T as transaction_payment::Trait>::Currency::deposit_into_existing(1344                    &who, refund,1345                ) {1346                    Ok(refund_imbalance) => {1347                        // The refund cannot be larger than the up front payed max weight.1348                        // `PostDispatchInfo::calc_unspent` guards against such a case.1349                        match payed.offset(refund_imbalance) {1350                            Ok(actual_payment) => actual_payment,1351                            Err(_) => return Err(InvalidTransaction::Payment.into()),1352                        }1353                    }1354                    // We do not recreate the account using the refund. The up front payment1355                    // is gone in that case.1356                    Err(_) => payed,1357                };1358            let imbalances = actual_payment.split(tip);1359            <T as transaction_payment::Trait>::OnTransactionPayment::on_unbalanceds(1360                Some(imbalances.0).into_iter().chain(Some(imbalances.1)),1361            );1362        }1363        Ok(())1364    }1365}