git.delta.rocks / unique-network / refs/commits / 23acc2ad1c40

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                if target_collection.mint_mode == false {479                    panic!("Collection is not in mint mode");480                }481482                Self::check_white_list(collection_id, owner.clone())?;483            }484485            match target_collection.mode486            {487                CollectionMode::NFT(_) => {488489                    // check size490                    ensure!(target_collection.custom_data_size >= properties.len() as u32, "Size of item is too large");491492                    // Create nft item493                    let item = NftItemType {494                        collection: collection_id,495                        owner: owner,496                        data: properties,497                    };498499                    Self::add_nft_item(item)?;500501                },502                CollectionMode::Fungible(_) => {503504                    // check size505                    ensure!(properties.len() as u32 == 0, "Size of item must be 0 with fungible type");506507                    let item = FungibleItemType {508                        collection: collection_id,509                        owner: owner,510                        value: (10 as u128).pow(target_collection.decimal_points)511                    };512513                    Self::add_fungible_item(item)?;514                },515                CollectionMode::ReFungible(_, _) => {516517                    // check size518                    ensure!(target_collection.custom_data_size >= properties.len() as u32, "Size of item is too large");519520                    let mut owner_list = Vec::new();521                    let value = (10 as u128).pow(target_collection.decimal_points);522                    owner_list.push(Ownership {owner: owner, fraction: value});523524                    let item = ReFungibleItemType {525                        collection: collection_id,526                        owner: owner_list,527                        data: properties528                    };529530                    Self::add_refungible_item(item)?;531                },532                _ => ()533            };534535            // call event536            Self::deposit_event(RawEvent::ItemCreated(collection_id, <ItemListIndex>::get(collection_id)));537538            Ok(())539        }540541        #[weight = 0]542        pub fn burn_item(origin, collection_id: u64, item_id: u64) -> DispatchResult {543544            let sender = ensure_signed(origin)?;545            Self::collection_exists(collection_id)?;546            let item_owner = Self::is_item_owner(sender.clone(), collection_id, item_id);547            if !item_owner548            {549                if !Self::is_owner_or_admin_permissions(collection_id, sender.clone()) {  550                    Self::check_white_list(collection_id, sender.clone())?;551                }552            }553            let target_collection = <Collection<T>>::get(collection_id);554555            match target_collection.mode556            {557                CollectionMode::NFT(_) => Self::burn_nft_item(collection_id, item_id)?,558                CollectionMode::Fungible(_)  => Self::burn_fungible_item(collection_id, item_id)?,559                CollectionMode::ReFungible(_, _)  => Self::burn_refungible_item(collection_id, item_id, sender.clone())?,560                _ => ()561            };562563            // call event564            Self::deposit_event(RawEvent::ItemDestroyed(collection_id, item_id));565566            Ok(())567        }568569        #[weight = 0]570        pub fn transfer(origin, recipient: T::AccountId, collection_id: u64, item_id: u64, value: u64) -> DispatchResult {571572            let sender = ensure_signed(origin)?;573574            let item_owner = Self::is_item_owner(sender.clone(), collection_id, item_id);575            if !item_owner {576                Self::check_white_list(collection_id, sender.clone())?;577                Self::check_white_list(collection_id, recipient.clone())?;578            }579580            let target_collection = <Collection<T>>::get(collection_id);581582            match target_collection.mode583            {584                CollectionMode::NFT(_) => Self::transfer_nft(collection_id, item_id, sender.clone(), recipient)?,585                CollectionMode::Fungible(_)  => Self::transfer_fungible(collection_id, item_id, value, sender.clone(), recipient)?,586                CollectionMode::ReFungible(_, _)  => Self::transfer_refungible(collection_id, item_id, value, sender.clone(), recipient)?,587                _ => ()588            };589590            Ok(())591        }592593        #[weight = 0]594        pub fn approve(origin, approved: T::AccountId, collection_id: u64, item_id: u64) -> DispatchResult {595596            let sender = ensure_signed(origin)?;597598            // amount param stub599            let amount = 100000000;600601            let item_owner = Self::is_item_owner(sender.clone(), collection_id, item_id);602            if !item_owner {603                Self::check_white_list(collection_id, approved.clone())?;604            }605606            let list_exists = <ApprovedList<T>>::contains_key(collection_id, (item_id, sender.clone()));607            if list_exists {608609                let mut list = <ApprovedList<T>>::get(collection_id, (item_id, sender.clone()));610                let item_contains = list.iter().any(|i| i.approved == approved);611612                if !item_contains {613                    list.push(ApprovePermissions { approved: approved.clone(), amount: amount });614                    <ApprovedList<T>>::insert(collection_id, (item_id, sender.clone()), list);615                }616            } else {617618                let mut list = Vec::new();619                list.push(ApprovePermissions { approved: approved.clone(), amount: amount });620                <ApprovedList<T>>::insert(collection_id, (item_id, sender.clone()), list);621            }622623            Ok(())624        }625626        #[weight = 0]627        pub fn transfer_from(origin, from: T::AccountId, recipient: T::AccountId, collection_id: u64, item_id: u64, value: u64 ) -> DispatchResult {628629            let sender = ensure_signed(origin)?;630            let approved_list_exists = <ApprovedList<T>>::contains_key(collection_id, (item_id, from.clone()));631            if approved_list_exists632            {633                Self::check_white_list(collection_id, from.clone())?;634                Self::check_white_list(collection_id, recipient.clone())?;635636                let list_itm = <ApprovedList<T>>::get(collection_id, (item_id, from.clone()));637                let opt_item = list_itm.iter().find(|i| i.approved == sender.clone());638                ensure!(opt_item.is_some(), "No approve found");639                ensure!(opt_item.unwrap().amount >= value, "Requested value more than approved");640641                // remove approve642                let approve_list: Vec<ApprovePermissions<T::AccountId>> = <ApprovedList<T>>::get(collection_id, (item_id, from.clone()))643                    .into_iter().filter(|i| i.approved != sender.clone()).collect();644                <ApprovedList<T>>::insert(collection_id, (item_id, from.clone()), approve_list);645            }646            else647            {648                panic!("Only approved addresses can call this method");649            }650651            let target_collection = <Collection<T>>::get(collection_id);652653            match target_collection.mode654            {655                CollectionMode::NFT(_) => Self::transfer_nft(collection_id, item_id, from, recipient)?,656                CollectionMode::Fungible(_)  => Self::transfer_fungible(collection_id, item_id, value, from.clone(), recipient)?,657                CollectionMode::ReFungible(_, _)  => Self::transfer_refungible(collection_id, item_id, value, from.clone(), recipient)?,658                _ => ()659            };660661            Ok(())662        }663664        #[weight = 0]665        pub fn safe_transfer_from(origin, collection_id: u64, item_id: u64, new_owner: T::AccountId) -> DispatchResult {666667            // let no_perm_mes = "You do not have permissions to modify this collection";668            // ensure!(<ApprovedList<T>>::contains_key((collection_id, item_id)), no_perm_mes);669            // let list_itm = <ApprovedList<T>>::get((collection_id, item_id));670            // ensure!(list_itm.contains(&new_owner.clone()), no_perm_mes);671672            // // on_nft_received  call673674            // Self::transfer(origin, collection_id, item_id, new_owner)?;675676            Ok(())677        }678679        #[weight = 0]680        pub fn set_offchain_schema(681            origin,682            collection_id: u64,683            schema: Vec<u8>684        ) -> DispatchResult {685            let sender = ensure_signed(origin)?;686            Self::check_owner_or_admin_permissions(collection_id, sender.clone())?;687688            let mut target_collection = <Collection<T>>::get(collection_id);689            target_collection.offchain_schema = schema;690            <Collection<T>>::insert(collection_id, target_collection);691692            Ok(())693        }694    }695}696697impl<T: Trait> Module<T> {698    fn add_fungible_item(item: FungibleItemType<T::AccountId>) -> DispatchResult {699        let current_index = <ItemListIndex>::get(item.collection)700            .checked_add(1)701            .expect("Item list index id error");702        let itemcopy = item.clone();703        let owner = item.owner.clone();704        let value = item.value as u64;705706        Self::add_token_index(item.collection, current_index, owner.clone())?;707708        <ItemListIndex>::insert(item.collection, current_index);709        <FungibleItemList<T>>::insert(item.collection, current_index, itemcopy);710711        // Update balance712        let new_balance = <Balance<T>>::get(item.collection, owner.clone())713            .checked_add(value)714            .unwrap();715        <Balance<T>>::insert(item.collection, owner.clone(), new_balance);716717        Ok(())718    }719720    fn add_refungible_item(item: ReFungibleItemType<T::AccountId>) -> DispatchResult {721        let current_index = <ItemListIndex>::get(item.collection)722            .checked_add(1)723            .expect("Item list index id error");724        let itemcopy = item.clone();725726        let value = item.owner.first().unwrap().fraction as u64;727        let owner = item.owner.first().unwrap().owner.clone();728729        Self::add_token_index(item.collection, current_index, owner.clone())?;730731        <ItemListIndex>::insert(item.collection, current_index);732        <ReFungibleItemList<T>>::insert(item.collection, current_index, itemcopy);733734        // Update balance735        let new_balance = <Balance<T>>::get(item.collection, owner.clone())736            .checked_add(value)737            .unwrap();738        <Balance<T>>::insert(item.collection, owner.clone(), new_balance);739740        Ok(())741    }742743    fn add_nft_item(item: NftItemType<T::AccountId>) -> DispatchResult {744        let current_index = <ItemListIndex>::get(item.collection)745            .checked_add(1)746            .expect("Item list index id error");747748        let item_owner = item.owner.clone();749        let collection_id = item.collection.clone();750        Self::add_token_index(collection_id, current_index, item.owner.clone())?;751752        <ItemListIndex>::insert(collection_id, current_index);753        <NftItemList<T>>::insert(collection_id, current_index, item);754755        // Update balance756        let new_balance = <Balance<T>>::get(collection_id, item_owner.clone())757            .checked_add(1)758            .unwrap();759        <Balance<T>>::insert(collection_id, item_owner.clone(), new_balance);760761        Ok(())762    }763764    fn burn_refungible_item(collection_id: u64, item_id: u64, owner: T::AccountId) -> DispatchResult {765        ensure!(766            <ReFungibleItemList<T>>::contains_key(collection_id, item_id),767            "Item does not exists"768        );769        let collection = <ReFungibleItemList<T>>::get(collection_id, item_id);770        let item = collection771            .owner772            .iter()773            .filter(|&i| i.owner == owner)774            .next()775            .unwrap();776        Self::remove_token_index(collection_id, item_id, owner.clone())?;777778        // remove approve list779        <ApprovedList<T>>::remove(collection_id, (item_id, owner.clone()));780781        // update balance782        let new_balance = <Balance<T>>::get(collection_id, item.owner.clone())783            .checked_sub(item.fraction as u64)784            .unwrap();785        <Balance<T>>::insert(collection_id, item.owner.clone(), new_balance);786787        <ReFungibleItemList<T>>::remove(collection_id, item_id);788789        Ok(())790    }791792    fn burn_nft_item(collection_id: u64, item_id: u64) -> DispatchResult {793        ensure!(794            <NftItemList<T>>::contains_key(collection_id, item_id),795            "Item does not exists"796        );797        let item = <NftItemList<T>>::get(collection_id, item_id);798        Self::remove_token_index(collection_id, item_id, item.owner.clone())?;799800        // remove approve list801        <ApprovedList<T>>::remove(collection_id, (item_id, item.owner.clone()));802803        // update balance804        let new_balance = <Balance<T>>::get(collection_id, item.owner.clone())805            .checked_sub(1)806            .unwrap();807        <Balance<T>>::insert(collection_id, item.owner.clone(), new_balance);808        <NftItemList<T>>::remove(collection_id, item_id);809810        Ok(())811    }812813    fn burn_fungible_item(collection_id: u64, item_id: u64) -> DispatchResult {814        ensure!(815            <FungibleItemList<T>>::contains_key(collection_id, item_id),816            "Item does not exists"817        );818        let item = <FungibleItemList<T>>::get(collection_id, item_id);819        Self::remove_token_index(collection_id, item_id, item.owner.clone())?;820821        // remove approve list822        <ApprovedList<T>>::remove(collection_id, (item_id, item.owner.clone()));823824        // update balance825        let new_balance = <Balance<T>>::get(collection_id, item.owner.clone())826            .checked_sub(item.value as u64)827            .unwrap();828        <Balance<T>>::insert(collection_id, item.owner.clone(), new_balance);829830        <FungibleItemList<T>>::remove(collection_id, item_id);831832        Ok(())833    }834835    fn collection_exists(collection_id: u64) -> DispatchResult {836        ensure!(837            <Collection<T>>::contains_key(collection_id),838            "This collection does not exist"839        );840        Ok(())841    }842843    fn check_owner_permissions(collection_id: u64, subject: T::AccountId) -> DispatchResult {844        Self::collection_exists(collection_id)?;845846        let target_collection = <Collection<T>>::get(collection_id);847        ensure!(848            subject == target_collection.owner,849            "You do not own this collection"850        );851852        Ok(())853    }854855    fn is_owner_or_admin_permissions(collection_id: u64, subject: T::AccountId) -> bool {856857        let target_collection = <Collection<T>>::get(collection_id);858        let mut result: bool = subject == target_collection.owner;859        let exists = <AdminList<T>>::contains_key(collection_id);860861        if !result & exists {862            if <AdminList<T>>::get(collection_id).contains(&subject) {863                result = true864            }865        }866867        result868    }869870    fn check_owner_or_admin_permissions(collection_id: u64, subject: T::AccountId) -> DispatchResult {871        872        Self::collection_exists(collection_id)?;873        let result = Self::is_owner_or_admin_permissions(collection_id, subject.clone());874875        if result == true {876            Ok(())877        } else {878            panic!("You do not have permissions to modify this collection")879        }880    }881882    fn is_item_owner(subject: T::AccountId, collection_id: u64, item_id: u64) -> bool {883        let target_collection = <Collection<T>>::get(collection_id);884885        match target_collection.mode {886            CollectionMode::NFT(_) => {887                <NftItemList<T>>::get(collection_id, item_id).owner == subject888            }889            CollectionMode::Fungible(_) => {890                <FungibleItemList<T>>::get(collection_id, item_id).owner == subject891            }892            CollectionMode::ReFungible(_, _) => {893                <ReFungibleItemList<T>>::get(collection_id, item_id)894                    .owner895                    .iter()896                    .any(|i| i.owner == subject)897            }898            CollectionMode::Invalid => false,899        }900    }901902    fn check_white_list(collection_id: u64, address: T::AccountId) -> DispatchResult {903904        let mes = "Address is not in white list";905        if <WhiteList<T>>::contains_key(collection_id){906            let wl = <WhiteList<T>>::get(collection_id);907            if !wl.contains(&address.clone()) {908                panic!(mes);909            }910        }911        else {912            panic!(mes);913        }914        Ok(())915    }916917    fn transfer_fungible(918        collection_id: u64,919        item_id: u64,920        value: u64,921        owner: T::AccountId,922        new_owner: T::AccountId,923    ) -> DispatchResult {924925        ensure!(926            <FungibleItemList<T>>::contains_key(collection_id, item_id),927            "Item not exists"928        );929930        let full_item = <FungibleItemList<T>>::get(collection_id, item_id);931        let amount = full_item.value;932933        ensure!(amount >= value.into(), "Item balance not enouth");934935        // update balance936        let balance_old_owner = <Balance<T>>::get(collection_id, owner.clone())937            .checked_sub(value)938            .unwrap();939        <Balance<T>>::insert(collection_id, owner.clone(), balance_old_owner);940941        let mut new_owner_account_id = 0;942        let new_owner_items = <AddressTokens<T>>::get(collection_id, new_owner.clone());943        if new_owner_items.len() > 0 {944            new_owner_account_id = new_owner_items[0];945        }946947        let val64 = value.into();948949        // transfer950        if amount == val64 && new_owner_account_id == 0 {951            // change owner952            // new owner do not have account953            let mut new_full_item = full_item.clone();954            new_full_item.owner = new_owner.clone();955            <FungibleItemList<T>>::insert(collection_id, item_id, new_full_item);956957            // update balance958            let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.clone())959                .checked_add(value)960                .unwrap();961            <Balance<T>>::insert(collection_id, new_owner.clone(), balance_new_owner);962963            // update index collection964            Self::move_token_index(collection_id, item_id, owner.clone(), new_owner.clone())?;965        } else {966            let mut new_full_item = full_item.clone();967            new_full_item.value -= val64;968969            // separate amount970            if new_owner_account_id > 0 {971                // new owner has account972                let mut item = <FungibleItemList<T>>::get(collection_id, new_owner_account_id);973                item.value += val64;974975                // update balance976                let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.clone())977                    .checked_add(value)978                    .unwrap();979                <Balance<T>>::insert(collection_id, new_owner.clone(), balance_new_owner);980981                <FungibleItemList<T>>::insert(collection_id, new_owner_account_id, item);982            } else {983                // new owner do not have account984                let item = FungibleItemType {985                    collection: collection_id,986                    owner: new_owner.clone(),987                    value: val64,988                };989990                Self::add_fungible_item(item)?;991            }992993            if amount == val64 {994                Self::remove_token_index(collection_id, item_id, full_item.owner.clone())?;995996                // remove approve list997                <ApprovedList<T>>::remove(collection_id, (item_id, full_item.owner.clone()));998                <FungibleItemList<T>>::remove(collection_id, item_id);999            }10001001            <FungibleItemList<T>>::insert(collection_id, item_id, new_full_item);1002        }10031004        Ok(())1005    }10061007    fn transfer_refungible(1008        collection_id: u64,1009        item_id: u64,1010        value: u64,1011        owner: T::AccountId,1012        new_owner: T::AccountId,1013    ) -> DispatchResult {10141015        ensure!(1016            <ReFungibleItemList<T>>::contains_key(collection_id, item_id),1017            "Item not exists"1018        );10191020        let full_item = <ReFungibleItemList<T>>::get(collection_id, item_id);1021        let item = full_item1022            .owner1023            .iter()1024            .filter(|i| i.owner == owner)1025            .next()1026            .unwrap();1027        let amount = item.fraction;10281029        ensure!(amount >= value.into(), "Item balance not enouth");10301031        // update balance1032        let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.clone())1033            .checked_sub(value)1034            .unwrap();1035        <Balance<T>>::insert(collection_id, item.owner.clone(), balance_old_owner);10361037        let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.clone())1038            .checked_add(value)1039            .unwrap();1040        <Balance<T>>::insert(collection_id, new_owner.clone(), balance_new_owner);10411042        let old_owner = item.owner.clone();1043        let new_owner_has_account = full_item.owner.iter().any(|i| i.owner == new_owner);1044        let val64 = value.into();10451046        // transfer1047        if amount == val64 && !new_owner_has_account {1048            // change owner1049            // new owner do not have account1050            let mut new_full_item = full_item.clone();1051            new_full_item1052                .owner1053                .iter_mut()1054                .find(|i| i.owner == owner)1055                .unwrap()1056                .owner = new_owner.clone();1057            <ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);10581059            // update index collection1060            Self::move_token_index(collection_id, item_id, old_owner.clone(), new_owner.clone())?;1061        } else {1062            let mut new_full_item = full_item.clone();1063            new_full_item1064                .owner1065                .iter_mut()1066                .find(|i| i.owner == owner)1067                .unwrap()1068                .fraction -= val64;10691070            // separate amount1071            if new_owner_has_account {1072                // new owner has account1073                new_full_item1074                    .owner1075                    .iter_mut()1076                    .find(|i| i.owner == new_owner)1077                    .unwrap()1078                    .fraction += val64;1079            } else {1080                // new owner do not have account1081                new_full_item.owner.push(Ownership {1082                    owner: new_owner.clone(),1083                    fraction: val64,1084                });1085                Self::add_token_index(collection_id, item_id, new_owner.clone())?;1086            }10871088            <ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);1089        }10901091        Ok(())1092    }10931094    fn transfer_nft(1095        collection_id: u64,1096        item_id: u64,1097        sender: T::AccountId,1098        new_owner: T::AccountId,1099    ) -> DispatchResult {1100    1101        ensure!(1102            <NftItemList<T>>::contains_key(collection_id, item_id),1103            "Item not exists"1104        );11051106        let mut item = <NftItemList<T>>::get(collection_id, item_id);11071108        ensure!(1109            sender == item.owner,1110            "sender parameter and item owner must be equal"1111        );11121113        // update balance1114        let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.clone())1115            .checked_sub(1)1116            .unwrap();1117        <Balance<T>>::insert(collection_id, item.owner.clone(), balance_old_owner);11181119        let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.clone())1120            .checked_add(1)1121            .unwrap();1122        <Balance<T>>::insert(collection_id, new_owner.clone(), balance_new_owner);11231124        // change owner1125        let old_owner = item.owner.clone();1126        item.owner = new_owner.clone();1127        <NftItemList<T>>::insert(collection_id, item_id, item);11281129        // update index collection1130        Self::move_token_index(collection_id, item_id, old_owner.clone(), new_owner.clone())?;11311132        // reset approved list1133        <ApprovedList<T>>::remove(collection_id, (item_id, old_owner));1134        Ok(())1135    }11361137    fn add_token_index(collection_id: u64, item_index: u64, owner: T::AccountId) -> DispatchResult {1138        let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner.clone());1139        if list_exists {1140            let mut list = <AddressTokens<T>>::get(collection_id, owner.clone());1141            let item_contains = list.contains(&item_index.clone());11421143            if !item_contains {1144                list.push(item_index.clone());1145            }11461147            <AddressTokens<T>>::insert(collection_id, owner.clone(), list);1148        } else {1149            let mut itm = Vec::new();1150            itm.push(item_index.clone());1151            <AddressTokens<T>>::insert(collection_id, owner, itm);1152        }11531154        Ok(())1155    }11561157    fn remove_token_index(1158        collection_id: u64,1159        item_index: u64,1160        owner: T::AccountId,1161    ) -> DispatchResult {1162        let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner.clone());1163        if list_exists {1164            let mut list = <AddressTokens<T>>::get(collection_id, owner.clone());1165            let item_contains = list.contains(&item_index.clone());11661167            if item_contains {1168                list.retain(|&item| item != item_index);1169                <AddressTokens<T>>::insert(collection_id, owner, list);1170            }1171        }11721173        Ok(())1174    }11751176    fn move_token_index(1177        collection_id: u64,1178        item_index: u64,1179        old_owner: T::AccountId,1180        new_owner: T::AccountId,1181    ) -> DispatchResult {1182        Self::remove_token_index(collection_id, item_index, old_owner)?;1183        Self::add_token_index(collection_id, item_index, new_owner)?;11841185        Ok(())1186    }1187}11881189////////////////////////////////////////////////////////////////////////////////////////////////////1190// Economic models11911192/// Fee multiplier.1193pub type Multiplier = FixedU128;11941195type BalanceOf<T> = <<T as transaction_payment::Trait>::Currency as Currency<1196    <T as system::Trait>::AccountId,1197>>::Balance;1198type NegativeImbalanceOf<T> = <<T as transaction_payment::Trait>::Currency as Currency<1199    <T as system::Trait>::AccountId,1200>>::NegativeImbalance;12011202/// Require the transactor pay for themselves and maybe include a tip to gain additional priority1203/// in the queue.1204#[derive(Encode, Decode, Clone, Eq, PartialEq)]1205pub struct ChargeTransactionPayment<T: transaction_payment::Trait + Send + Sync>(1206    #[codec(compact)] BalanceOf<T>,1207);12081209impl<T: Trait + transaction_payment::Trait + Send + Sync> sp_std::fmt::Debug1210    for ChargeTransactionPayment<T>1211{1212    #[cfg(feature = "std")]1213    fn fmt(&self, f: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {1214        write!(f, "ChargeTransactionPayment<{:?}>", self.0)1215    }1216    #[cfg(not(feature = "std"))]1217    fn fmt(&self, _: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {1218        Ok(())1219    }1220}12211222impl<T: Trait + transaction_payment::Trait + Send + Sync> ChargeTransactionPayment<T>1223where1224    T::Call:1225        Dispatchable<Info = DispatchInfo, PostInfo = PostDispatchInfo> + IsSubType<Module<T>, T>,1226    BalanceOf<T>: Send + Sync + FixedPointOperand,1227{1228    /// utility constructor. Used only in client/factory code.1229    pub fn from(fee: BalanceOf<T>) -> Self {1230        Self(fee)1231    }12321233    pub fn traditional_fee(1234        len: usize,1235        info: &DispatchInfoOf<T::Call>,1236        tip: BalanceOf<T>,1237    ) -> BalanceOf<T>1238    where1239        T::Call: Dispatchable<Info = DispatchInfo>,1240    {1241        <transaction_payment::Module<T>>::compute_fee(len as u32, info, tip)1242    }12431244    fn withdraw_fee(1245        &self,1246        who: &T::AccountId,1247        call: &T::Call,1248        info: &DispatchInfoOf<T::Call>,1249        len: usize,1250    ) -> Result<(BalanceOf<T>, Option<NegativeImbalanceOf<T>>), TransactionValidityError> {1251        let tip = self.0;12521253        // Set fee based on call type. Creating collection costs 1 Unique.1254        // All other transactions have traditional fees so far1255        let fee = match call.is_sub_type() {1256            Some(Call::create_collection(..)) => <BalanceOf<T>>::from(1_000_000_000),1257            _ => Self::traditional_fee(len, info, tip), // Flat fee model, use only for testing purposes1258                                                        // _ => <BalanceOf<T>>::from(100)1259        };12601261        // Determine who is paying transaction fee based on ecnomic model1262        // Parse call to extract collection ID and access collection sponsor1263        let sponsor: T::AccountId = match call.is_sub_type() {1264            Some(Call::create_item(collection_id, _properties, _owner)) => {1265                <Collection<T>>::get(collection_id).sponsor1266            }1267            Some(Call::transfer(_new_owner, collection_id, _item_id, _value)) => {1268                <Collection<T>>::get(collection_id).sponsor1269            }12701271            _ => T::AccountId::default(),1272        };12731274        let mut who_pays_fee: T::AccountId = sponsor.clone();1275        if sponsor == T::AccountId::default() {1276            who_pays_fee = who.clone();1277        }12781279        // Only mess with balances if fee is not zero.1280        if fee.is_zero() {1281            return Ok((fee, None));1282        }12831284        match <T as transaction_payment::Trait>::Currency::withdraw(1285            &who_pays_fee,1286            fee,1287            if tip.is_zero() {1288                WithdrawReason::TransactionPayment.into()1289            } else {1290                WithdrawReason::TransactionPayment | WithdrawReason::Tip1291            },1292            ExistenceRequirement::KeepAlive,1293        ) {1294            Ok(imbalance) => Ok((fee, Some(imbalance))),1295            Err(_) => Err(InvalidTransaction::Payment.into()),1296        }1297    }1298}12991300impl<T: Trait + transaction_payment::Trait + Send + Sync> SignedExtension1301    for ChargeTransactionPayment<T>1302where1303    BalanceOf<T>: Send + Sync + From<u64> + FixedPointOperand,1304    T::Call:1305        Dispatchable<Info = DispatchInfo, PostInfo = PostDispatchInfo> + IsSubType<Module<T>, T>,1306{1307    const IDENTIFIER: &'static str = "ChargeTransactionPayment";1308    type AccountId = T::AccountId;1309    type Call = T::Call;1310    type AdditionalSigned = ();1311    type Pre = (1312        BalanceOf<T>,1313        Self::AccountId,1314        Option<NegativeImbalanceOf<T>>,1315        BalanceOf<T>,1316    );1317    fn additional_signed(&self) -> sp_std::result::Result<(), TransactionValidityError> {1318        Ok(())1319    }13201321    fn validate(1322        &self,1323        who: &Self::AccountId,1324        call: &Self::Call,1325        info: &DispatchInfoOf<Self::Call>,1326        len: usize,1327    ) -> TransactionValidity {1328        let (fee, _) = self.withdraw_fee(who, call, info, len)?;13291330        let mut r = ValidTransaction::default();1331        // NOTE: we probably want to maximize the _fee (of any type) per weight unit_ here, which1332        // will be a bit more than setting the priority to tip. For now, this is enough.1333        r.priority = fee.saturated_into::<TransactionPriority>();1334        Ok(r)1335    }13361337    fn pre_dispatch(1338        self,1339        who: &Self::AccountId,1340        call: &Self::Call,1341        info: &DispatchInfoOf<Self::Call>,1342        len: usize,1343    ) -> Result<Self::Pre, TransactionValidityError> {1344        let (fee, imbalance) = self.withdraw_fee(who, call, info, len)?;1345        Ok((self.0, who.clone(), imbalance, fee))1346    }13471348    fn post_dispatch(1349        pre: Self::Pre,1350        info: &DispatchInfoOf<Self::Call>,1351        post_info: &PostDispatchInfoOf<Self::Call>,1352        len: usize,1353        _result: &DispatchResult,1354    ) -> Result<(), TransactionValidityError> {1355        let (tip, who, imbalance, fee) = pre;1356        if let Some(payed) = imbalance {1357            let actual_fee = <transaction_payment::Module<T>>::compute_actual_fee(1358                len as u32, info, post_info, tip,1359            );1360            let refund = fee.saturating_sub(actual_fee);1361            let actual_payment =1362                match <T as transaction_payment::Trait>::Currency::deposit_into_existing(1363                    &who, refund,1364                ) {1365                    Ok(refund_imbalance) => {1366                        // The refund cannot be larger than the up front payed max weight.1367                        // `PostDispatchInfo::calc_unspent` guards against such a case.1368                        match payed.offset(refund_imbalance) {1369                            Ok(actual_payment) => actual_payment,1370                            Err(_) => return Err(InvalidTransaction::Payment.into()),1371                        }1372                    }1373                    // We do not recreate the account using the refund. The up front payment1374                    // is gone in that case.1375                    Err(_) => payed,1376                };1377            let imbalances = actual_payment.split(tip);1378            <T as transaction_payment::Trait>::OnTransactionPayment::on_unbalanceds(1379                Some(imbalances.0).into_iter().chain(Some(imbalances.1)),1380            );1381        }1382        Ok(())1383    }1384}