git.delta.rocks / unique-network / refs/commits / 5c8bf09b7657

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)?;570            Self::check_white_list(collection_id, sender.clone())?;571            Self::check_white_list(collection_id, recipient.clone())?;572            let target_collection = <Collection<T>>::get(collection_id);573574            match target_collection.mode575            {576                CollectionMode::NFT(_) => Self::transfer_nft(collection_id, item_id, sender.clone(), recipient)?,577                CollectionMode::Fungible(_)  => Self::transfer_fungible(collection_id, item_id, value, sender.clone(), recipient)?,578                CollectionMode::ReFungible(_, _)  => Self::transfer_refungible(collection_id, item_id, value, sender.clone(), recipient)?,579                _ => ()580            };581582            Ok(())583        }584585        #[weight = 0]586        pub fn approve(origin, approved: T::AccountId, collection_id: u64, item_id: u64) -> DispatchResult {587588            let sender = ensure_signed(origin)?;589590            // amount param stub591            let amount = 100000000;592593            let item_owner = Self::is_item_owner(sender.clone(), collection_id, item_id);594            if !item_owner {595                Self::check_white_list(collection_id, approved.clone())?;596            }597598            let list_exists = <ApprovedList<T>>::contains_key(collection_id, (item_id, sender.clone()));599            if list_exists {600601                let mut list = <ApprovedList<T>>::get(collection_id, (item_id, sender.clone()));602                let item_contains = list.iter().any(|i| i.approved == approved);603604                if !item_contains {605                    list.push(ApprovePermissions { approved: approved.clone(), amount: amount });606                    <ApprovedList<T>>::insert(collection_id, (item_id, sender.clone()), list);607                }608            } else {609610                let mut list = Vec::new();611                list.push(ApprovePermissions { approved: approved.clone(), amount: amount });612                <ApprovedList<T>>::insert(collection_id, (item_id, sender.clone()), list);613            }614615            Ok(())616        }617618        #[weight = 0]619        pub fn transfer_from(origin, from: T::AccountId, recipient: T::AccountId, collection_id: u64, item_id: u64, value: u64 ) -> DispatchResult {620621            let sender = ensure_signed(origin)?;622            let approved_list_exists = <ApprovedList<T>>::contains_key(collection_id, (item_id, from.clone()));623624            ensure!(approved_list_exists, "Only approved addresses can call this method");625626            Self::check_white_list(collection_id, from.clone())?;627            Self::check_white_list(collection_id, recipient.clone())?;628629            let list_itm = <ApprovedList<T>>::get(collection_id, (item_id, from.clone()));630            let opt_item = list_itm.iter().find(|i| i.approved == sender.clone());631            ensure!(opt_item.is_some(), "No approve found");632            ensure!(opt_item.unwrap().amount >= value, "Requested value more than approved");633634            // remove approve635            let approve_list: Vec<ApprovePermissions<T::AccountId>> = <ApprovedList<T>>::get(collection_id, (item_id, from.clone()))636                .into_iter().filter(|i| i.approved != sender.clone()).collect();637            <ApprovedList<T>>::insert(collection_id, (item_id, from.clone()), approve_list);638639            let target_collection = <Collection<T>>::get(collection_id);640641            match target_collection.mode642            {643                CollectionMode::NFT(_) => Self::transfer_nft(collection_id, item_id, from, recipient)?,644                CollectionMode::Fungible(_)  => Self::transfer_fungible(collection_id, item_id, value, from.clone(), recipient)?,645                CollectionMode::ReFungible(_, _)  => Self::transfer_refungible(collection_id, item_id, value, from.clone(), recipient)?,646                _ => ()647            };648649            Ok(())650        }651652        #[weight = 0]653        pub fn safe_transfer_from(origin, collection_id: u64, item_id: u64, new_owner: T::AccountId) -> DispatchResult {654655            // let no_perm_mes = "You do not have permissions to modify this collection";656            // ensure!(<ApprovedList<T>>::contains_key((collection_id, item_id)), no_perm_mes);657            // let list_itm = <ApprovedList<T>>::get((collection_id, item_id));658            // ensure!(list_itm.contains(&new_owner.clone()), no_perm_mes);659660            // // on_nft_received  call661662            // Self::transfer(origin, collection_id, item_id, new_owner)?;663664            Ok(())665        }666667        #[weight = 0]668        pub fn set_offchain_schema(669            origin,670            collection_id: u64,671            schema: Vec<u8>672        ) -> DispatchResult {673            let sender = ensure_signed(origin)?;674            Self::check_owner_or_admin_permissions(collection_id, sender.clone())?;675676            let mut target_collection = <Collection<T>>::get(collection_id);677            target_collection.offchain_schema = schema;678            <Collection<T>>::insert(collection_id, target_collection);679680            Ok(())681        }682    }683}684685impl<T: Trait> Module<T> {686    fn add_fungible_item(item: FungibleItemType<T::AccountId>) -> DispatchResult {687        let current_index = <ItemListIndex>::get(item.collection)688            .checked_add(1)689            .expect("Item list index id error");690        let itemcopy = item.clone();691        let owner = item.owner.clone();692        let value = item.value as u64;693694        Self::add_token_index(item.collection, current_index, owner.clone())?;695696        <ItemListIndex>::insert(item.collection, current_index);697        <FungibleItemList<T>>::insert(item.collection, current_index, itemcopy);698699        // Update balance700        let new_balance = <Balance<T>>::get(item.collection, owner.clone())701            .checked_add(value)702            .unwrap();703        <Balance<T>>::insert(item.collection, owner.clone(), new_balance);704705        Ok(())706    }707708    fn add_refungible_item(item: ReFungibleItemType<T::AccountId>) -> DispatchResult {709        let current_index = <ItemListIndex>::get(item.collection)710            .checked_add(1)711            .expect("Item list index id error");712        let itemcopy = item.clone();713714        let value = item.owner.first().unwrap().fraction as u64;715        let owner = item.owner.first().unwrap().owner.clone();716717        Self::add_token_index(item.collection, current_index, owner.clone())?;718719        <ItemListIndex>::insert(item.collection, current_index);720        <ReFungibleItemList<T>>::insert(item.collection, current_index, itemcopy);721722        // Update balance723        let new_balance = <Balance<T>>::get(item.collection, owner.clone())724            .checked_add(value)725            .unwrap();726        <Balance<T>>::insert(item.collection, owner.clone(), new_balance);727728        Ok(())729    }730731    fn add_nft_item(item: NftItemType<T::AccountId>) -> DispatchResult {732        let current_index = <ItemListIndex>::get(item.collection)733            .checked_add(1)734            .expect("Item list index id error");735736        let item_owner = item.owner.clone();737        let collection_id = item.collection.clone();738        Self::add_token_index(collection_id, current_index, item.owner.clone())?;739740        <ItemListIndex>::insert(collection_id, current_index);741        <NftItemList<T>>::insert(collection_id, current_index, item);742743        // Update balance744        let new_balance = <Balance<T>>::get(collection_id, item_owner.clone())745            .checked_add(1)746            .unwrap();747        <Balance<T>>::insert(collection_id, item_owner.clone(), new_balance);748749        Ok(())750    }751752    fn burn_refungible_item(collection_id: u64, item_id: u64, owner: T::AccountId) -> DispatchResult {753        ensure!(754            <ReFungibleItemList<T>>::contains_key(collection_id, item_id),755            "Item does not exists"756        );757        let collection = <ReFungibleItemList<T>>::get(collection_id, item_id);758        let item = collection759            .owner760            .iter()761            .filter(|&i| i.owner == owner)762            .next()763            .unwrap();764        Self::remove_token_index(collection_id, item_id, owner.clone())?;765766        // remove approve list767        <ApprovedList<T>>::remove(collection_id, (item_id, owner.clone()));768769        // update balance770        let new_balance = <Balance<T>>::get(collection_id, item.owner.clone())771            .checked_sub(item.fraction as u64)772            .unwrap();773        <Balance<T>>::insert(collection_id, item.owner.clone(), new_balance);774775        <ReFungibleItemList<T>>::remove(collection_id, item_id);776777        Ok(())778    }779780    fn burn_nft_item(collection_id: u64, item_id: u64) -> DispatchResult {781        ensure!(782            <NftItemList<T>>::contains_key(collection_id, item_id),783            "Item does not exists"784        );785        let item = <NftItemList<T>>::get(collection_id, item_id);786        Self::remove_token_index(collection_id, item_id, item.owner.clone())?;787788        // remove approve list789        <ApprovedList<T>>::remove(collection_id, (item_id, item.owner.clone()));790791        // update balance792        let new_balance = <Balance<T>>::get(collection_id, item.owner.clone())793            .checked_sub(1)794            .unwrap();795        <Balance<T>>::insert(collection_id, item.owner.clone(), new_balance);796        <NftItemList<T>>::remove(collection_id, item_id);797798        Ok(())799    }800801    fn burn_fungible_item(collection_id: u64, item_id: u64) -> DispatchResult {802        ensure!(803            <FungibleItemList<T>>::contains_key(collection_id, item_id),804            "Item does not exists"805        );806        let item = <FungibleItemList<T>>::get(collection_id, item_id);807        Self::remove_token_index(collection_id, item_id, item.owner.clone())?;808809        // remove approve list810        <ApprovedList<T>>::remove(collection_id, (item_id, item.owner.clone()));811812        // update balance813        let new_balance = <Balance<T>>::get(collection_id, item.owner.clone())814            .checked_sub(item.value as u64)815            .unwrap();816        <Balance<T>>::insert(collection_id, item.owner.clone(), new_balance);817818        <FungibleItemList<T>>::remove(collection_id, item_id);819820        Ok(())821    }822823    fn collection_exists(collection_id: u64) -> DispatchResult {824        ensure!(825            <Collection<T>>::contains_key(collection_id),826            "This collection does not exist"827        );828        Ok(())829    }830831    fn check_owner_permissions(collection_id: u64, subject: T::AccountId) -> DispatchResult {832        Self::collection_exists(collection_id)?;833834        let target_collection = <Collection<T>>::get(collection_id);835        ensure!(836            subject == target_collection.owner,837            "You do not own this collection"838        );839840        Ok(())841    }842843    fn is_owner_or_admin_permissions(collection_id: u64, subject: T::AccountId) -> bool {844845        let target_collection = <Collection<T>>::get(collection_id);846        let mut result: bool = subject == target_collection.owner;847        let exists = <AdminList<T>>::contains_key(collection_id);848849        if !result & exists {850            if <AdminList<T>>::get(collection_id).contains(&subject) {851                result = true852            }853        }854855        result856    }857858    fn check_owner_or_admin_permissions(collection_id: u64, subject: T::AccountId) -> DispatchResult {859        860        Self::collection_exists(collection_id)?;861        let result = Self::is_owner_or_admin_permissions(collection_id, subject.clone());862863        ensure!(result, "You do not have permissions to modify this collection");864        Ok(())865    }866867    fn is_item_owner(subject: T::AccountId, collection_id: u64, item_id: u64) -> bool {868        let target_collection = <Collection<T>>::get(collection_id);869870        match target_collection.mode {871            CollectionMode::NFT(_) => {872                <NftItemList<T>>::get(collection_id, item_id).owner == subject873            }874            CollectionMode::Fungible(_) => {875                <FungibleItemList<T>>::get(collection_id, item_id).owner == subject876            }877            CollectionMode::ReFungible(_, _) => {878                <ReFungibleItemList<T>>::get(collection_id, item_id)879                    .owner880                    .iter()881                    .any(|i| i.owner == subject)882            }883            CollectionMode::Invalid => false,884        }885    }886887    fn check_white_list(collection_id: u64, address: T::AccountId) -> DispatchResult {888889        let mes = "Address is not in white list";890        ensure!(<WhiteList<T>>::contains_key(collection_id), mes);891        let wl = <WhiteList<T>>::get(collection_id);892        ensure!(wl.contains(&address.clone()), mes);893894        Ok(())895    }896897    fn transfer_fungible(898        collection_id: u64,899        item_id: u64,900        value: u64,901        owner: T::AccountId,902        new_owner: T::AccountId,903    ) -> DispatchResult {904905        ensure!(906            <FungibleItemList<T>>::contains_key(collection_id, item_id),907            "Item not exists"908        );909910        let full_item = <FungibleItemList<T>>::get(collection_id, item_id);911        let amount = full_item.value;912913        ensure!(amount >= value.into(), "Item balance not enouth");914915        // update balance916        let balance_old_owner = <Balance<T>>::get(collection_id, owner.clone())917            .checked_sub(value)918            .unwrap();919        <Balance<T>>::insert(collection_id, owner.clone(), balance_old_owner);920921        let mut new_owner_account_id = 0;922        let new_owner_items = <AddressTokens<T>>::get(collection_id, new_owner.clone());923        if new_owner_items.len() > 0 {924            new_owner_account_id = new_owner_items[0];925        }926927        let val64 = value.into();928929        // transfer930        if amount == val64 && new_owner_account_id == 0 {931            // change owner932            // new owner do not have account933            let mut new_full_item = full_item.clone();934            new_full_item.owner = new_owner.clone();935            <FungibleItemList<T>>::insert(collection_id, item_id, new_full_item);936937            // update balance938            let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.clone())939                .checked_add(value)940                .unwrap();941            <Balance<T>>::insert(collection_id, new_owner.clone(), balance_new_owner);942943            // update index collection944            Self::move_token_index(collection_id, item_id, owner.clone(), new_owner.clone())?;945        } else {946            let mut new_full_item = full_item.clone();947            new_full_item.value -= val64;948949            // separate amount950            if new_owner_account_id > 0 {951                // new owner has account952                let mut item = <FungibleItemList<T>>::get(collection_id, new_owner_account_id);953                item.value += val64;954955                // update balance956                let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.clone())957                    .checked_add(value)958                    .unwrap();959                <Balance<T>>::insert(collection_id, new_owner.clone(), balance_new_owner);960961                <FungibleItemList<T>>::insert(collection_id, new_owner_account_id, item);962            } else {963                // new owner do not have account964                let item = FungibleItemType {965                    collection: collection_id,966                    owner: new_owner.clone(),967                    value: val64,968                };969970                Self::add_fungible_item(item)?;971            }972973            if amount == val64 {974                Self::remove_token_index(collection_id, item_id, full_item.owner.clone())?;975976                // remove approve list977                <ApprovedList<T>>::remove(collection_id, (item_id, full_item.owner.clone()));978                <FungibleItemList<T>>::remove(collection_id, item_id);979            }980981            <FungibleItemList<T>>::insert(collection_id, item_id, new_full_item);982        }983984        Ok(())985    }986987    fn transfer_refungible(988        collection_id: u64,989        item_id: u64,990        value: u64,991        owner: T::AccountId,992        new_owner: T::AccountId,993    ) -> DispatchResult {994995        ensure!(996            <ReFungibleItemList<T>>::contains_key(collection_id, item_id),997            "Item not exists"998        );9991000        let full_item = <ReFungibleItemList<T>>::get(collection_id, item_id);1001        let item = full_item1002            .owner1003            .iter()1004            .filter(|i| i.owner == owner)1005            .next()1006            .unwrap();1007        let amount = item.fraction;10081009        ensure!(amount >= value.into(), "Item balance not enouth");10101011        // update balance1012        let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.clone())1013            .checked_sub(value)1014            .unwrap();1015        <Balance<T>>::insert(collection_id, item.owner.clone(), balance_old_owner);10161017        let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.clone())1018            .checked_add(value)1019            .unwrap();1020        <Balance<T>>::insert(collection_id, new_owner.clone(), balance_new_owner);10211022        let old_owner = item.owner.clone();1023        let new_owner_has_account = full_item.owner.iter().any(|i| i.owner == new_owner);1024        let val64 = value.into();10251026        // transfer1027        if amount == val64 && !new_owner_has_account {1028            // change owner1029            // new owner do not have account1030            let mut new_full_item = full_item.clone();1031            new_full_item1032                .owner1033                .iter_mut()1034                .find(|i| i.owner == owner)1035                .unwrap()1036                .owner = new_owner.clone();1037            <ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);10381039            // update index collection1040            Self::move_token_index(collection_id, item_id, old_owner.clone(), new_owner.clone())?;1041        } else {1042            let mut new_full_item = full_item.clone();1043            new_full_item1044                .owner1045                .iter_mut()1046                .find(|i| i.owner == owner)1047                .unwrap()1048                .fraction -= val64;10491050            // separate amount1051            if new_owner_has_account {1052                // new owner has account1053                new_full_item1054                    .owner1055                    .iter_mut()1056                    .find(|i| i.owner == new_owner)1057                    .unwrap()1058                    .fraction += val64;1059            } else {1060                // new owner do not have account1061                new_full_item.owner.push(Ownership {1062                    owner: new_owner.clone(),1063                    fraction: val64,1064                });1065                Self::add_token_index(collection_id, item_id, new_owner.clone())?;1066            }10671068            <ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);1069        }10701071        Ok(())1072    }10731074    fn transfer_nft(1075        collection_id: u64,1076        item_id: u64,1077        sender: T::AccountId,1078        new_owner: T::AccountId,1079    ) -> DispatchResult {1080    1081        ensure!(1082            <NftItemList<T>>::contains_key(collection_id, item_id),1083            "Item not exists"1084        );10851086        let mut item = <NftItemList<T>>::get(collection_id, item_id);10871088        ensure!(1089            sender == item.owner,1090            "sender parameter and item owner must be equal"1091        );10921093        // update balance1094        let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.clone())1095            .checked_sub(1)1096            .unwrap();1097        <Balance<T>>::insert(collection_id, item.owner.clone(), balance_old_owner);10981099        let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.clone())1100            .checked_add(1)1101            .unwrap();1102        <Balance<T>>::insert(collection_id, new_owner.clone(), balance_new_owner);11031104        // change owner1105        let old_owner = item.owner.clone();1106        item.owner = new_owner.clone();1107        <NftItemList<T>>::insert(collection_id, item_id, item);11081109        // update index collection1110        Self::move_token_index(collection_id, item_id, old_owner.clone(), new_owner.clone())?;11111112        // reset approved list1113        <ApprovedList<T>>::remove(collection_id, (item_id, old_owner));1114        Ok(())1115    }11161117    fn add_token_index(collection_id: u64, item_index: u64, owner: T::AccountId) -> DispatchResult {1118        let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner.clone());1119        if list_exists {1120            let mut list = <AddressTokens<T>>::get(collection_id, owner.clone());1121            let item_contains = list.contains(&item_index.clone());11221123            if !item_contains {1124                list.push(item_index.clone());1125            }11261127            <AddressTokens<T>>::insert(collection_id, owner.clone(), list);1128        } else {1129            let mut itm = Vec::new();1130            itm.push(item_index.clone());1131            <AddressTokens<T>>::insert(collection_id, owner, itm);1132        }11331134        Ok(())1135    }11361137    fn remove_token_index(1138        collection_id: u64,1139        item_index: u64,1140        owner: T::AccountId,1141    ) -> DispatchResult {1142        let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner.clone());1143        if list_exists {1144            let mut list = <AddressTokens<T>>::get(collection_id, owner.clone());1145            let item_contains = list.contains(&item_index.clone());11461147            if item_contains {1148                list.retain(|&item| item != item_index);1149                <AddressTokens<T>>::insert(collection_id, owner, list);1150            }1151        }11521153        Ok(())1154    }11551156    fn move_token_index(1157        collection_id: u64,1158        item_index: u64,1159        old_owner: T::AccountId,1160        new_owner: T::AccountId,1161    ) -> DispatchResult {1162        Self::remove_token_index(collection_id, item_index, old_owner)?;1163        Self::add_token_index(collection_id, item_index, new_owner)?;11641165        Ok(())1166    }1167}11681169////////////////////////////////////////////////////////////////////////////////////////////////////1170// Economic models11711172/// Fee multiplier.1173pub type Multiplier = FixedU128;11741175type BalanceOf<T> = <<T as transaction_payment::Trait>::Currency as Currency<1176    <T as system::Trait>::AccountId,1177>>::Balance;1178type NegativeImbalanceOf<T> = <<T as transaction_payment::Trait>::Currency as Currency<1179    <T as system::Trait>::AccountId,1180>>::NegativeImbalance;11811182/// Require the transactor pay for themselves and maybe include a tip to gain additional priority1183/// in the queue.1184#[derive(Encode, Decode, Clone, Eq, PartialEq)]1185pub struct ChargeTransactionPayment<T: transaction_payment::Trait + Send + Sync>(1186    #[codec(compact)] BalanceOf<T>,1187);11881189impl<T: Trait + transaction_payment::Trait + Send + Sync> sp_std::fmt::Debug1190    for ChargeTransactionPayment<T>1191{1192    #[cfg(feature = "std")]1193    fn fmt(&self, f: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {1194        write!(f, "ChargeTransactionPayment<{:?}>", self.0)1195    }1196    #[cfg(not(feature = "std"))]1197    fn fmt(&self, _: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {1198        Ok(())1199    }1200}12011202impl<T: Trait + transaction_payment::Trait + Send + Sync> ChargeTransactionPayment<T>1203where1204    T::Call:1205        Dispatchable<Info = DispatchInfo, PostInfo = PostDispatchInfo> + IsSubType<Module<T>, T>,1206    BalanceOf<T>: Send + Sync + FixedPointOperand,1207{1208    /// utility constructor. Used only in client/factory code.1209    pub fn from(fee: BalanceOf<T>) -> Self {1210        Self(fee)1211    }12121213    pub fn traditional_fee(1214        len: usize,1215        info: &DispatchInfoOf<T::Call>,1216        tip: BalanceOf<T>,1217    ) -> BalanceOf<T>1218    where1219        T::Call: Dispatchable<Info = DispatchInfo>,1220    {1221        <transaction_payment::Module<T>>::compute_fee(len as u32, info, tip)1222    }12231224    fn withdraw_fee(1225        &self,1226        who: &T::AccountId,1227        call: &T::Call,1228        info: &DispatchInfoOf<T::Call>,1229        len: usize,1230    ) -> Result<(BalanceOf<T>, Option<NegativeImbalanceOf<T>>), TransactionValidityError> {1231        let tip = self.0;12321233        // Set fee based on call type. Creating collection costs 1 Unique.1234        // All other transactions have traditional fees so far1235        let fee = match call.is_sub_type() {1236            Some(Call::create_collection(..)) => <BalanceOf<T>>::from(1_000_000_000),1237            _ => Self::traditional_fee(len, info, tip), // Flat fee model, use only for testing purposes1238                                                        // _ => <BalanceOf<T>>::from(100)1239        };12401241        // Determine who is paying transaction fee based on ecnomic model1242        // Parse call to extract collection ID and access collection sponsor1243        let sponsor: T::AccountId = match call.is_sub_type() {1244            Some(Call::create_item(collection_id, _properties, _owner)) => {1245                <Collection<T>>::get(collection_id).sponsor1246            }1247            Some(Call::transfer(_new_owner, collection_id, _item_id, _value)) => {1248                <Collection<T>>::get(collection_id).sponsor1249            }12501251            _ => T::AccountId::default(),1252        };12531254        let mut who_pays_fee: T::AccountId = sponsor.clone();1255        if sponsor == T::AccountId::default() {1256            who_pays_fee = who.clone();1257        }12581259        // Only mess with balances if fee is not zero.1260        if fee.is_zero() {1261            return Ok((fee, None));1262        }12631264        match <T as transaction_payment::Trait>::Currency::withdraw(1265            &who_pays_fee,1266            fee,1267            if tip.is_zero() {1268                WithdrawReason::TransactionPayment.into()1269            } else {1270                WithdrawReason::TransactionPayment | WithdrawReason::Tip1271            },1272            ExistenceRequirement::KeepAlive,1273        ) {1274            Ok(imbalance) => Ok((fee, Some(imbalance))),1275            Err(_) => Err(InvalidTransaction::Payment.into()),1276        }1277    }1278}12791280impl<T: Trait + transaction_payment::Trait + Send + Sync> SignedExtension1281    for ChargeTransactionPayment<T>1282where1283    BalanceOf<T>: Send + Sync + From<u64> + FixedPointOperand,1284    T::Call:1285        Dispatchable<Info = DispatchInfo, PostInfo = PostDispatchInfo> + IsSubType<Module<T>, T>,1286{1287    const IDENTIFIER: &'static str = "ChargeTransactionPayment";1288    type AccountId = T::AccountId;1289    type Call = T::Call;1290    type AdditionalSigned = ();1291    type Pre = (1292        BalanceOf<T>,1293        Self::AccountId,1294        Option<NegativeImbalanceOf<T>>,1295        BalanceOf<T>,1296    );1297    fn additional_signed(&self) -> sp_std::result::Result<(), TransactionValidityError> {1298        Ok(())1299    }13001301    fn validate(1302        &self,1303        who: &Self::AccountId,1304        call: &Self::Call,1305        info: &DispatchInfoOf<Self::Call>,1306        len: usize,1307    ) -> TransactionValidity {1308        let (fee, _) = self.withdraw_fee(who, call, info, len)?;13091310        let mut r = ValidTransaction::default();1311        // NOTE: we probably want to maximize the _fee (of any type) per weight unit_ here, which1312        // will be a bit more than setting the priority to tip. For now, this is enough.1313        r.priority = fee.saturated_into::<TransactionPriority>();1314        Ok(r)1315    }13161317    fn pre_dispatch(1318        self,1319        who: &Self::AccountId,1320        call: &Self::Call,1321        info: &DispatchInfoOf<Self::Call>,1322        len: usize,1323    ) -> Result<Self::Pre, TransactionValidityError> {1324        let (fee, imbalance) = self.withdraw_fee(who, call, info, len)?;1325        Ok((self.0, who.clone(), imbalance, fee))1326    }13271328    fn post_dispatch(1329        pre: Self::Pre,1330        info: &DispatchInfoOf<Self::Call>,1331        post_info: &PostDispatchInfoOf<Self::Call>,1332        len: usize,1333        _result: &DispatchResult,1334    ) -> Result<(), TransactionValidityError> {1335        let (tip, who, imbalance, fee) = pre;1336        if let Some(payed) = imbalance {1337            let actual_fee = <transaction_payment::Module<T>>::compute_actual_fee(1338                len as u32, info, post_info, tip,1339            );1340            let refund = fee.saturating_sub(actual_fee);1341            let actual_payment =1342                match <T as transaction_payment::Trait>::Currency::deposit_into_existing(1343                    &who, refund,1344                ) {1345                    Ok(refund_imbalance) => {1346                        // The refund cannot be larger than the up front payed max weight.1347                        // `PostDispatchInfo::calc_unspent` guards against such a case.1348                        match payed.offset(refund_imbalance) {1349                            Ok(actual_payment) => actual_payment,1350                            Err(_) => return Err(InvalidTransaction::Payment.into()),1351                        }1352                    }1353                    // We do not recreate the account using the refund. The up front payment1354                    // is gone in that case.1355                    Err(_) => payed,1356                };1357            let imbalances = actual_payment.split(tip);1358            <T as transaction_payment::Trait>::OnTransactionPayment::on_unbalanceds(1359                Some(imbalances.0).into_iter().chain(Some(imbalances.1)),1360            );1361        }1362        Ok(())1363    }1364}