git.delta.rocks / unique-network / refs/commits / 23e0b8caf5e4

difftreelog

Merge pull request #113 from usetech-llc/feature/NFTPAR-196_sponsor_setVariableMetadata

Greg Zaitsev2021-03-22parents: #105eff5 #9180c84.patch.diff
in: master
Sponsored setVariableMetadata

19 files changed

modifiednode/src/chain_spec.rsdiffbeforeafterboth
--- a/node/src/chain_spec.rs
+++ b/node/src/chain_spec.rs
@@ -180,9 +180,9 @@
                 .collect(),
         }),
         pallet_nft: Some(NftConfig {
-            collection: vec![(
+            collection_id: vec![(
                 1,
-                CollectionType {
+                Collection {
                     owner: get_account_id_from_seed::<sr25519::Public>("Alice"),
                     mode: CollectionMode::NFT,
                     access: AccessMode::Normal,
modifiedpallets/nft/src/default_weights.rsdiffbeforeafterboth
--- a/pallets/nft/src/default_weights.rs
+++ b/pallets/nft/src/default_weights.rs
@@ -127,6 +127,11 @@
             .saturating_add(DbWeight::get().reads(0 as Weight))
             .saturating_add(DbWeight::get().writes(2 as Weight))
     }    
+    fn set_variable_meta_data_sponsoring_rate_limit() -> Weight {
+        (3_500_000 as Weight)
+            .saturating_add(DbWeight::get().reads(2 as Weight))
+            .saturating_add(DbWeight::get().writes(1 as Weight))
+    }
     fn toggle_contract_white_list() -> Weight {
         (3_000_000 as Weight)
             .saturating_add(DbWeight::get().reads(0 as Weight))
modifiedpallets/nft/src/lib.rsdiffbeforeafterboth
before · pallets/nft/src/lib.rs
1//2// This file is subject to the terms and conditions defined in3// file 'LICENSE', which is part of this source code package.4//56#![recursion_limit = "1024"]78#![cfg_attr(not(feature = "std"), no_std)]910#[cfg(feature = "std")]11pub use std::*;1213#[cfg(feature = "std")]14pub use serde::*;1516use codec::{Decode, Encode};17pub use frame_support::{18    construct_runtime, decl_event, decl_module, decl_storage, decl_error,19    dispatch::DispatchResult,20    ensure, fail, parameter_types,21    traits::{22        Currency, ExistenceRequirement, Get, Imbalance, KeyOwnerProofSystem, OnUnbalanced,23        Randomness, IsSubType, WithdrawReasons,24    },25    weights::{26        constants::{BlockExecutionWeight, ExtrinsicBaseWeight, RocksDbWeight, WEIGHT_PER_SECOND},27        DispatchInfo, GetDispatchInfo, IdentityFee, Pays, PostDispatchInfo, Weight,28        WeightToFeePolynomial, DispatchClass,29    },30    StorageValue,31    transactional,32};3334use frame_system::{self as system, ensure_signed, ensure_root};35use sp_runtime::sp_std::prelude::Vec;36use sp_runtime::{37    traits::{38        Hash, DispatchInfoOf, Dispatchable, PostDispatchInfoOf, Saturating, SaturatedConversion, SignedExtension, Zero,39    },40    transaction_validity::{41        TransactionPriority, InvalidTransaction, TransactionValidity, TransactionValidityError, ValidTransaction,42    },43    FixedPointOperand, FixedU128,44};45use sp_runtime::traits::StaticLookup;46use pallet_contracts::chain_extension::UncheckedFrom;47use pallet_transaction_payment::OnChargeTransaction;4849#[cfg(test)]50mod mock;5152#[cfg(test)]53mod tests;5455mod default_weights;5657pub const MAX_DECIMAL_POINTS: DecimalPoints = 30;58pub const MAX_REFUNGIBLE_PIECES: u128 = 1_000_000_000_000_000_000_000;59pub const MAX_SPONSOR_TIMEOUT: u32 = 10_368_000;60pub const MAX_TOKEN_OWNERSHIP: u32 = 10_000_000;6162// Structs63// #region6465pub type CollectionId = u32;66pub type TokenId = u32;67pub type DecimalPoints = u8;6869#[derive(Encode, Decode, Eq, Debug, Clone, PartialEq)]70#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]71pub enum CollectionMode {72    Invalid,73    NFT,74    // decimal points75    Fungible(DecimalPoints),76    ReFungible,77}7879impl Default for CollectionMode {80    fn default() -> Self {81        Self::Invalid82    }83}8485impl Into<u8> for CollectionMode {86    fn into(self) -> u8 {87        match self {88            CollectionMode::Invalid => 0,89            CollectionMode::NFT => 1,90            CollectionMode::Fungible(_) => 2,91            CollectionMode::ReFungible => 3,92        }93    }94}9596#[derive(Encode, Decode, Eq, Debug, Clone, PartialEq)]97#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]98pub enum AccessMode {99    Normal,100    WhiteList,101}102impl Default for AccessMode {103    fn default() -> Self {104        Self::Normal105    }106}107108#[derive(Encode, Decode, Eq, Debug, Clone, PartialEq)]109#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]110pub enum SchemaVersion {111    ImageURL,112    Unique,113}114impl Default for SchemaVersion {115    fn default() -> Self {116        Self::ImageURL117    }118}119120#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]121#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]122pub struct Ownership<AccountId> {123    pub owner: AccountId,124    pub fraction: u128,125}126127#[derive(Encode, Decode, Debug, Clone, PartialEq)]128#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]129pub enum SponsorshipState<AccountId> {130    /// The fees are applied to the transaction sender131    Disabled,132    Unconfirmed(AccountId),133    /// Transactions are sponsored by specified account134    Confirmed(AccountId),135}136137impl<AccountId> SponsorshipState<AccountId> {138    fn sponsor(&self) -> Option<&AccountId> {139        match self {140            Self::Confirmed(sponsor) => Some(sponsor),141            _ => None,142        }143    }144145    fn pending_sponsor(&self) -> Option<&AccountId> {146        match self {147            Self::Unconfirmed(sponsor) | Self::Confirmed(sponsor) => Some(sponsor),148            _ => None,149        }150    }151152    fn confirmed(&self) -> bool {153        matches!(self, Self::Confirmed(_))154    }155}156157impl<T> Default for SponsorshipState<T> {158    fn default() -> Self {159        Self::Disabled160    }161}162163#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]164#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]165pub struct CollectionType<AccountId> {166    pub owner: AccountId,167    pub mode: CollectionMode,168    pub access: AccessMode,169    pub decimal_points: DecimalPoints,170    pub name: Vec<u16>,        // 64 include null escape char171    pub description: Vec<u16>, // 256 include null escape char172    pub token_prefix: Vec<u8>, // 16 include null escape char173    pub mint_mode: bool,174    pub offchain_schema: Vec<u8>,175    pub schema_version: SchemaVersion,176    pub sponsorship: SponsorshipState<AccountId>,177    pub limits: CollectionLimits, // Collection private restrictions 178    pub variable_on_chain_schema: Vec<u8>, //179    pub const_on_chain_schema: Vec<u8>, //180}181182#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]183#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]184pub struct NftItemType<AccountId> {185    pub owner: AccountId,186    pub const_data: Vec<u8>,187    pub variable_data: Vec<u8>,188}189190#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]191#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]192pub struct FungibleItemType {193    pub value: u128,194}195196#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]197#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]198pub struct ReFungibleItemType<AccountId> {199    pub owner: Vec<Ownership<AccountId>>,200    pub const_data: Vec<u8>,201    pub variable_data: Vec<u8>,202}203204// #[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]205// #[cfg_attr(feature = "std", derive(Serialize, Deserialize))]206// pub struct VestingItem<AccountId, Moment> {207//     pub sender: AccountId,208//     pub recipient: AccountId,209//     pub collection_id: CollectionId,210//     pub item_id: TokenId,211//     pub amount: u64,212//     pub vesting_date: Moment,213// }214215#[derive(Encode, Decode, Debug, Clone, PartialEq)]216#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]217pub struct CollectionLimits {218    pub account_token_ownership_limit: u32,219    pub sponsored_data_size: u32,220    pub token_limit: u32,221222    // Timeouts for item types in passed blocks223    pub sponsor_transfer_timeout: u32,224    pub owner_can_transfer: bool,225    pub owner_can_destroy: bool,226}227228impl Default for CollectionLimits {229    fn default() -> CollectionLimits {230        CollectionLimits { 231            account_token_ownership_limit: 10_000_000, 232            token_limit: u32::max_value(),233            sponsored_data_size: u32::MAX,234            sponsor_transfer_timeout: 14400,235            owner_can_transfer: true,236            owner_can_destroy: true237        }238    }239}240241#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]242#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]243pub struct ChainLimits {244    pub collection_numbers_limit: u32,245    pub account_token_ownership_limit: u32,246    pub collections_admins_limit: u64,247    pub custom_data_limit: u32,248249    // Timeouts for item types in passed blocks250    pub nft_sponsor_transfer_timeout: u32,251    pub fungible_sponsor_transfer_timeout: u32,252    pub refungible_sponsor_transfer_timeout: u32,253254    // Schema limits255    pub offchain_schema_limit: u32,256    pub variable_on_chain_schema_limit: u32,257    pub const_on_chain_schema_limit: u32,258}259260pub trait WeightInfo {261	fn create_collection() -> Weight;262	fn destroy_collection() -> Weight;263	fn add_to_white_list() -> Weight;264	fn remove_from_white_list() -> Weight;265    fn set_public_access_mode() -> Weight;266    fn set_mint_permission() -> Weight;267    fn change_collection_owner() -> Weight;268    fn add_collection_admin() -> Weight;269    fn remove_collection_admin() -> Weight;270    fn set_collection_sponsor() -> Weight;271    fn confirm_sponsorship() -> Weight;272    fn remove_collection_sponsor() -> Weight;273    fn create_item(s: usize) -> Weight;274    fn burn_item() -> Weight;275    fn transfer() -> Weight;276    fn approve() -> Weight;277    fn transfer_from() -> Weight;278    fn set_offchain_schema() -> Weight;279    fn set_const_on_chain_schema() -> Weight;280    fn set_variable_on_chain_schema() -> Weight;281    fn set_variable_meta_data() -> Weight;282    fn enable_contract_sponsoring() -> Weight;283    fn set_schema_version() -> Weight;284    fn set_chain_limits() -> Weight;285    fn set_contract_sponsoring_rate_limit() -> Weight;286    fn toggle_contract_white_list() -> Weight;287    fn add_to_contract_white_list() -> Weight;288    fn remove_from_contract_white_list() -> Weight;289    fn set_collection_limits() -> Weight;290}291292#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]293#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]294pub struct CreateNftData {295    pub const_data: Vec<u8>,296    pub variable_data: Vec<u8>,297}298299#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]300#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]301pub struct CreateFungibleData {302    pub value: u128,303}304305#[derive(Encode, Decode, Default, Debug, Clone, PartialEq)]306#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]307pub struct CreateReFungibleData {308    pub const_data: Vec<u8>,309    pub variable_data: Vec<u8>,310    pub pieces: u128,311}312313#[derive(Encode, Decode, Debug, Clone, PartialEq)]314#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]315pub enum CreateItemData {316    NFT(CreateNftData),317    Fungible(CreateFungibleData),318    ReFungible(CreateReFungibleData),319}320321impl CreateItemData {322    pub fn len(&self) -> usize {323        let len = match self {324            CreateItemData::NFT(data) => data.variable_data.len() + data.const_data.len(),325            CreateItemData::ReFungible(data) => data.variable_data.len() + data.const_data.len(),326            _ => 0327        };328        329        return len;330    }331}332333impl From<CreateNftData> for CreateItemData {334    fn from(item: CreateNftData) -> Self {335        CreateItemData::NFT(item)336    }337}338339impl From<CreateReFungibleData> for CreateItemData {340    fn from(item: CreateReFungibleData) -> Self {341        CreateItemData::ReFungible(item)342    }343}344345impl From<CreateFungibleData> for CreateItemData {346    fn from(item: CreateFungibleData) -> Self {347        CreateItemData::Fungible(item)348    }349}350351352decl_error! {353	/// Error for non-fungible-token module.354	pub enum Error for Module<T: Config> {355        /// Total collections bound exceeded.356        TotalCollectionsLimitExceeded,357		/// Decimal_points parameter must be lower than MAX_DECIMAL_POINTS constant, currently it is 30.358        CollectionDecimalPointLimitExceeded, 359        /// Collection name can not be longer than 63 char.360        CollectionNameLimitExceeded, 361        /// Collection description can not be longer than 255 char.362        CollectionDescriptionLimitExceeded, 363        /// Token prefix can not be longer than 15 char.364        CollectionTokenPrefixLimitExceeded,365        /// This collection does not exist.366        CollectionNotFound,367        /// Item not exists.368        TokenNotFound,369        /// Admin not found370        AdminNotFound,371        /// Arithmetic calculation overflow.372        NumOverflow,       373        /// Account already has admin role.374        AlreadyAdmin,  375        /// You do not own this collection.376        NoPermission,377        /// This address is not set as sponsor, use setCollectionSponsor first.378        ConfirmUnsetSponsorFail,379        /// Collection is not in mint mode.380        PublicMintingNotAllowed,381        /// Sender parameter and item owner must be equal.382        MustBeTokenOwner,383        /// Item balance not enough.384        TokenValueTooLow,385        /// Size of item is too large.386        NftSizeLimitExceeded,387        /// No approve found388        ApproveNotFound,389        /// Requested value more than approved.390        TokenValueNotEnough,391        /// Only approved addresses can call this method.392        ApproveRequired,393        /// Address is not in white list.394        AddresNotInWhiteList,395        /// Number of collection admins bound exceeded.396        CollectionAdminsLimitExceeded,397        /// Owned tokens by a single address bound exceeded.398        AddressOwnershipLimitExceeded,399        /// Length of items properties must be greater than 0.400        EmptyArgument,401        /// const_data exceeded data limit.402        TokenConstDataLimitExceeded,403        /// variable_data exceeded data limit.404        TokenVariableDataLimitExceeded,405        /// Not NFT item data used to mint in NFT collection.406        NotNftDataUsedToMintNftCollectionToken,407        /// Not Fungible item data used to mint in Fungible collection.408        NotFungibleDataUsedToMintFungibleCollectionToken,409        /// Not Re Fungible item data used to mint in Re Fungible collection.410        NotReFungibleDataUsedToMintReFungibleCollectionToken,411        /// Unexpected collection type.412        UnexpectedCollectionType,413        /// Can't store metadata in fungible tokens.414        CantStoreMetadataInFungibleTokens,415        /// Collection token limit exceeded416        CollectionTokenLimitExceeded,417        /// Account token limit exceeded per collection418        AccountTokenLimitExceeded,419        /// Collection limit bounds per collection exceeded420        CollectionLimitBoundsExceeded,421        /// Tried to enable permissions which are only permitted to be disabled422        OwnerPermissionsCantBeReverted,423        /// Schema data size limit bound exceeded424        SchemaDataLimitExceeded,425        /// Maximum refungibility exceeded426        WrongRefungiblePieces,427        /// createRefungible should be called with one owner428        BadCreateRefungibleCall,429	}430}431432pub trait Config: system::Config + Sized + pallet_transaction_payment::Config + pallet_contracts::Config {433    type Event: From<Event<Self>> + Into<<Self as system::Config>::Event>;434435    /// Weight information for extrinsics in this pallet.436	type WeightInfo: WeightInfo;437438    type Currency: Currency<Self::AccountId>;439    type CollectionCreationPrice: Get<<<Self as Config>::Currency as Currency<Self::AccountId>>::Balance>;440    type TreasuryAccountId: Get<Self::AccountId>;441}442443#[cfg(feature = "runtime-benchmarks")]444mod benchmarking;445446// #endregion447448// # Used definitions449//450// ## User control levels451//452// chain-controlled - key is uncontrolled by user453//                    i.e autoincrementing index454//                    can use non-cryptographic hash455// real - key is controlled by user456//        but it is hard to generate enough colliding values, i.e owner of signed txs457//        can use non-cryptographic hash458// controlled - key is completly controlled by users459//              i.e maps with mutable keys460//              should use cryptographic hash461//462// ## User control level downgrade reasons463//464// ?1 - chain-controlled -> controlled465//      collections/tokens can be destroyed, resulting in massive holes466// ?2 - chain-controlled -> controlled467//      same as ?1, but can be only added, resulting in easier exploitation468// ?3 - real -> controlled469//      no confirmation required, so addresses can be easily generated470decl_storage! {471    trait Store for Module<T: Config> as Nft {472473        //#region Private members474        /// Id of next collection475        CreatedCollectionCount: u32;476        /// Used for migrations477        ChainVersion: u64;478        /// Id of last collection token479        /// Collection id (controlled?1)480        ItemListIndex: map hasher(blake2_128_concat) CollectionId => TokenId;481        //#endregion482483        //#region Chain limits struct484        pub ChainLimit get(fn chain_limit) config(): ChainLimits;485        //#endregion486487        //#region Bound counters488        /// Amount of collections destroyed, used for total amount tracking with489        /// CreatedCollectionCount490        DestroyedCollectionCount: u32;491        /// Total amount of account owned tokens (NFTs + RFTs + unique fungibles)492        /// Account id (real)493        pub AccountItemCount get(fn account_item_count): map hasher(twox_64_concat) T::AccountId => u32;494        //#endregion495496        //#region Basic collections497        /// Collection info498        /// Collection id (controlled?1)499        pub Collection get(fn collection) config(): map hasher(blake2_128_concat) CollectionId => CollectionType<T::AccountId>;500        /// List of collection admins501        /// Collection id (controlled?2)502        pub AdminList get(fn admin_list_collection): map hasher(blake2_128_concat) CollectionId => Vec<T::AccountId>;503        /// Whitelisted collection users504        /// Collection id (controlled?2), user id (controlled?3)505        pub WhiteList get(fn white_list): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) T::AccountId => bool;506        //#endregion507508        /// How many of collection items user have509        /// Collection id (controlled?2), account id (real)510        pub Balance get(fn balance_count): double_map hasher(blake2_128_concat) CollectionId, hasher(twox_64_concat) T::AccountId => u128;511512        /// Amount of items which spender can transfer out of owners account (via transferFrom)513        /// Collection id (controlled?2), (token id (controlled ?2) + owner account id (real) + spender account id (controlled?3))514        pub Allowances get(fn approved): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) (TokenId, T::AccountId, T::AccountId) => u128;515516        //#region Item collections517        /// Collection id (controlled?2), token id (controlled?1)518        pub NftItemList get(fn nft_item_id) config(): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => NftItemType<T::AccountId>;519        /// Collection id (controlled?2), owner (controlled?2)520        pub FungibleItemList get(fn fungible_item_id) config(): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) T::AccountId => FungibleItemType;521        /// Collection id (controlled?2), token id (controlled?1)522        pub ReFungibleItemList get(fn refungible_item_id) config(): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => ReFungibleItemType<T::AccountId>;523        //#endregion524525        //#region Index list526        /// Collection id (controlled?2), tokens owner (controlled?2)527        pub AddressTokens get(fn address_tokens): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) T::AccountId => Vec<TokenId>;528        //#endregion529530        //#region Tokens transfer rate limit baskets531        /// (Collection id (controlled?2), who created (real))532        pub CreateItemBasket get(fn create_item_basket): map hasher(blake2_128_concat) (CollectionId, T::AccountId) => T::BlockNumber;533        /// Collection id (controlled?2), token id (controlled?2)534        pub NftTransferBasket get(fn nft_transfer_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => T::BlockNumber;535        /// Collection id (controlled?2), owning user (real)536        pub FungibleTransferBasket get(fn fungible_transfer_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(twox_64_concat) T::AccountId => T::BlockNumber;537        /// Collection id (controlled?2), token id (controlled?2)538        pub ReFungibleTransferBasket get(fn refungible_transfer_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => T::BlockNumber;539        //#endregion540541        //#region Contract Sponsorship and Ownership542        /// Contract address (real)543        pub ContractOwner get(fn contract_owner): map hasher(twox_64_concat) T::AccountId => T::AccountId;544        /// Contract address (real)545        pub ContractSelfSponsoring get(fn contract_self_sponsoring): map hasher(twox_64_concat) T::AccountId => bool;546        /// (Contract address(real), caller (real))547        pub ContractSponsorBasket get(fn contract_sponsor_basket): map hasher(twox_64_concat) (T::AccountId, T::AccountId) => T::BlockNumber;548        /// Contract address (real)549        pub ContractSponsoringRateLimit get(fn contract_sponsoring_rate_limit): map hasher(twox_64_concat) T::AccountId => T::BlockNumber;550        /// Contract address (real)551        pub ContractWhiteListEnabled get(fn contract_white_list_enabled): map hasher(twox_64_concat) T::AccountId => bool; 552        /// Contract address (real) => Whitelisted user (controlled?3)553        pub ContractWhiteList get(fn contract_white_list): double_map hasher(twox_64_concat) T::AccountId, hasher(blake2_128_concat) T::AccountId => bool; 554        //#endregion555    }556    add_extra_genesis {557        build(|config: &GenesisConfig<T>| {558            // Modification of storage559            for (_num, _c) in &config.collection {560                <Module<T>>::init_collection(_c);561            }562563            for (_num, _c, _i) in &config.nft_item_id {564                <Module<T>>::init_nft_token(*_c, _i);565            }566567            for (collection_id, account_id, fungible_item) in &config.fungible_item_id {568                <Module<T>>::init_fungible_token(*collection_id, account_id, fungible_item);569            }570571            for (_num, _c, _i) in &config.refungible_item_id {572                <Module<T>>::init_refungible_token(*_c, _i);573            }574        })575    }576}577578decl_event!(579    pub enum Event<T>580    where581        AccountId = <T as system::Config>::AccountId,582    {583        /// New collection was created584        /// 585        /// # Arguments586        /// 587        /// * collection_id: Globally unique identifier of newly created collection.588        /// 589        /// * mode: [CollectionMode] converted into u8.590        /// 591        /// * account_id: Collection owner.592        Created(CollectionId, u8, AccountId),593594        /// New item was created.595        /// 596        /// # Arguments597        /// 598        /// * collection_id: Id of the collection where item was created.599        /// 600        /// * item_id: Id of an item. Unique within the collection.601        ///602        /// * recipient: Owner of newly created item 603        ItemCreated(CollectionId, TokenId, AccountId),604605        /// Collection item was burned.606        /// 607        /// # Arguments608        /// 609        /// collection_id.610        /// 611        /// item_id: Identifier of burned NFT.612        ItemDestroyed(CollectionId, TokenId),613614        /// Item was transferred615        ///616        /// * collection_id: Id of collection to which item is belong617        ///618        /// * item_id: Id of an item619        ///620        /// * sender: Original owner of item621        ///622        /// * recipient: New owner of item623        ///624        /// * amount: Always 1 for NFT625        Transfer(CollectionId, TokenId, AccountId, AccountId, u128),626    }627);628629decl_module! {630    pub struct Module<T: Config> for enum Call 631    where 632        origin: T::Origin633    {634        fn deposit_event() = default;635        type Error = Error<T>;636637        fn on_initialize(now: T::BlockNumber) -> Weight {638            0639        }640641        /// This method creates a Collection of NFTs. Each Token may have multiple properties encoded as an array of bytes of certain length. The initial owner and admin of the collection are set to the address that signed the transaction. Both addresses can be changed later.642        /// 643        /// # Permissions644        /// 645        /// * Anyone.646        /// 647        /// # Arguments648        /// 649        /// * collection_name: UTF-16 string with collection name (limit 64 characters), will be stored as zero-terminated.650        /// 651        /// * collection_description: UTF-16 string with collection description (limit 256 characters), will be stored as zero-terminated.652        /// 653        /// * token_prefix: UTF-8 string with token prefix.654        /// 655        /// * mode: [CollectionMode] collection type and type dependent data.656        // returns collection ID657        #[weight = <T as Config>::WeightInfo::create_collection()]658        #[transactional]659        pub fn create_collection(origin,660                                 collection_name: Vec<u16>,661                                 collection_description: Vec<u16>,662                                 token_prefix: Vec<u8>,663                                 mode: CollectionMode) -> DispatchResult {664665            // Anyone can create a collection666            let who = ensure_signed(origin)?;667668            // Take a (non-refundable) deposit of collection creation669            let mut imbalance = <<<T as Config>::Currency as Currency<T::AccountId>>::PositiveImbalance>::zero();670            imbalance.subsume(<<T as Config>::Currency as Currency<T::AccountId>>::deposit_creating(671                &T::TreasuryAccountId::get(),672                T::CollectionCreationPrice::get(),673            ));674            <T as Config>::Currency::settle(675                &who,676                imbalance,677                WithdrawReasons::TRANSFER,678                ExistenceRequirement::KeepAlive,679            ).map_err(|_| Error::<T>::NoPermission)?;680681            let decimal_points = match mode {682                CollectionMode::Fungible(points) => points,683                _ => 0684            };685686            let chain_limit = ChainLimit::get();687688            let created_count = CreatedCollectionCount::get();689            let destroyed_count = DestroyedCollectionCount::get();690691            // bound Total number of collections692            ensure!(created_count - destroyed_count < chain_limit.collection_numbers_limit, Error::<T>::TotalCollectionsLimitExceeded);693694            // check params695            ensure!(decimal_points <= MAX_DECIMAL_POINTS, Error::<T>::CollectionDecimalPointLimitExceeded);696            ensure!(collection_name.len() <= 64, Error::<T>::CollectionNameLimitExceeded);697            ensure!(collection_description.len() <= 256, Error::<T>::CollectionDescriptionLimitExceeded);698            ensure!(token_prefix.len() <= 16, Error::<T>::CollectionTokenPrefixLimitExceeded);699700            // Generate next collection ID701            let next_id = created_count702                .checked_add(1)703                .ok_or(Error::<T>::NumOverflow)?;704705            CreatedCollectionCount::put(next_id);706707            let limits = CollectionLimits {708                sponsored_data_size: chain_limit.custom_data_limit,709                ..Default::default()710            };711712            // Create new collection713            let new_collection = CollectionType {714                owner: who.clone(),715                name: collection_name,716                mode: mode.clone(),717                mint_mode: false,718                access: AccessMode::Normal,719                description: collection_description,720                decimal_points: decimal_points,721                token_prefix: token_prefix,722                offchain_schema: Vec::new(),723                schema_version: SchemaVersion::ImageURL,724                sponsorship: SponsorshipState::Disabled,725                variable_on_chain_schema: Vec::new(),726                const_on_chain_schema: Vec::new(),727                limits,728            };729730            // Add new collection to map731            <Collection<T>>::insert(next_id, new_collection);732733            // call event734            Self::deposit_event(RawEvent::Created(next_id, mode.into(), who.clone()));735736            Ok(())737        }738739        /// **DANGEROUS**: Destroys collection and all NFTs within this collection. Users irrecoverably lose their assets and may lose real money.740        /// 741        /// # Permissions742        /// 743        /// * Collection Owner.744        /// 745        /// # Arguments746        /// 747        /// * collection_id: collection to destroy.748        #[weight = <T as Config>::WeightInfo::destroy_collection()]749        #[transactional]750        pub fn destroy_collection(origin, collection_id: CollectionId) -> DispatchResult {751752            let sender = ensure_signed(origin)?;753            Self::check_owner_permissions(collection_id, sender)?;754755            let target_collection = <Collection<T>>::get(collection_id);756            if !target_collection.limits.owner_can_destroy {757                fail!(Error::<T>::NoPermission);758            }759760            <AddressTokens<T>>::remove_prefix(collection_id);761            <Allowances<T>>::remove_prefix(collection_id);762            <Balance<T>>::remove_prefix(collection_id);763            <ItemListIndex>::remove(collection_id);764            <AdminList<T>>::remove(collection_id);765            <Collection<T>>::remove(collection_id);766            <WhiteList<T>>::remove_prefix(collection_id);767768            <NftItemList<T>>::remove_prefix(collection_id);769            <FungibleItemList<T>>::remove_prefix(collection_id);770            <ReFungibleItemList<T>>::remove_prefix(collection_id);771772            <NftTransferBasket<T>>::remove_prefix(collection_id);773            <FungibleTransferBasket<T>>::remove_prefix(collection_id);774            <ReFungibleTransferBasket<T>>::remove_prefix(collection_id);775776            DestroyedCollectionCount::put(DestroyedCollectionCount::get()777                .checked_add(1)778                .ok_or(Error::<T>::NumOverflow)?);779780            Ok(())781        }782783        /// Add an address to white list.784        /// 785        /// # Permissions786        /// 787        /// * Collection Owner788        /// * Collection Admin789        /// 790        /// # Arguments791        /// 792        /// * collection_id.793        /// 794        /// * address.795        #[weight = <T as Config>::WeightInfo::add_to_white_list()]796        #[transactional]797        pub fn add_to_white_list(origin, collection_id: CollectionId, address: T::AccountId) -> DispatchResult{798799            let sender = ensure_signed(origin)?;800            Self::check_owner_or_admin_permissions(collection_id, sender)?;801802            <WhiteList<T>>::insert(collection_id, address, true);803            804            Ok(())805        }806807        /// Remove an address from white list.808        /// 809        /// # Permissions810        /// 811        /// * Collection Owner812        /// * Collection Admin813        /// 814        /// # Arguments815        /// 816        /// * collection_id.817        /// 818        /// * address.819        #[weight = <T as Config>::WeightInfo::remove_from_white_list()]820        #[transactional]821        pub fn remove_from_white_list(origin, collection_id: CollectionId, address: T::AccountId) -> DispatchResult{822823            let sender = ensure_signed(origin)?;824            Self::check_owner_or_admin_permissions(collection_id, sender)?;825826            <WhiteList<T>>::remove(collection_id, address);827828            Ok(())829        }830831        /// Toggle between normal and white list access for the methods with access for `Anyone`.832        /// 833        /// # Permissions834        /// 835        /// * Collection Owner.836        /// 837        /// # Arguments838        /// 839        /// * collection_id.840        /// 841        /// * mode: [AccessMode]842        #[weight = <T as Config>::WeightInfo::set_public_access_mode()]843        #[transactional]844        pub fn set_public_access_mode(origin, collection_id: CollectionId, mode: AccessMode) -> DispatchResult845        {846            let sender = ensure_signed(origin)?;847848            Self::check_owner_permissions(collection_id, sender)?;849            let mut target_collection = <Collection<T>>::get(collection_id);850            target_collection.access = mode;851            <Collection<T>>::insert(collection_id, target_collection);852853            Ok(())854        }855856        /// Allows Anyone to create tokens if:857        /// * White List is enabled, and858        /// * Address is added to white list, and859        /// * This method was called with True parameter860        /// 861        /// # Permissions862        /// * Collection Owner863        ///864        /// # Arguments865        /// 866        /// * collection_id.867        /// 868        /// * mint_permission: Boolean parameter. If True, allows minting to Anyone with conditions above.869        #[weight = <T as Config>::WeightInfo::set_mint_permission()]870        #[transactional]871        pub fn set_mint_permission(origin, collection_id: CollectionId, mint_permission: bool) -> DispatchResult872        {873            let sender = ensure_signed(origin)?;874875            Self::check_owner_permissions(collection_id, sender)?;876            let mut target_collection = <Collection<T>>::get(collection_id);877            target_collection.mint_mode = mint_permission;878            <Collection<T>>::insert(collection_id, target_collection);879880            Ok(())881        }882883        /// Change the owner of the collection.884        /// 885        /// # Permissions886        /// 887        /// * Collection Owner.888        /// 889        /// # Arguments890        /// 891        /// * collection_id.892        /// 893        /// * new_owner.894        #[weight = <T as Config>::WeightInfo::change_collection_owner()]895        #[transactional]896        pub fn change_collection_owner(origin, collection_id: CollectionId, new_owner: T::AccountId) -> DispatchResult {897898            let sender = ensure_signed(origin)?;899            Self::check_owner_permissions(collection_id, sender)?;900            let mut target_collection = <Collection<T>>::get(collection_id);901            target_collection.owner = new_owner;902            <Collection<T>>::insert(collection_id, target_collection);903904            Ok(())905        }906907        /// Adds an admin of the Collection.908        /// NFT Collection can be controlled by multiple admin addresses (some which can also be servers, for example). Admins can issue and burn NFTs, as well as add and remove other admins, but cannot change NFT or Collection ownership. 909        /// 910        /// # Permissions911        /// 912        /// * Collection Owner.913        /// * Collection Admin.914        /// 915        /// # Arguments916        /// 917        /// * collection_id: ID of the Collection to add admin for.918        /// 919        /// * new_admin_id: Address of new admin to add.920        #[weight = <T as Config>::WeightInfo::add_collection_admin()]921        #[transactional]922        pub fn add_collection_admin(origin, collection_id: CollectionId, new_admin_id: T::AccountId) -> DispatchResult {923924            let sender = ensure_signed(origin)?;925            Self::check_owner_or_admin_permissions(collection_id, sender)?;926            let mut admin_arr: Vec<T::AccountId> = Vec::new();927928            if <AdminList<T>>::contains_key(collection_id)929            {930                admin_arr = <AdminList<T>>::get(collection_id);931                ensure!(!admin_arr.contains(&new_admin_id), Error::<T>::AlreadyAdmin);932            }933934            // Number of collection admins935            ensure!((admin_arr.len() as u64) < ChainLimit::get().collections_admins_limit, Error::<T>::CollectionAdminsLimitExceeded);936937            admin_arr.push(new_admin_id);938            <AdminList<T>>::insert(collection_id, admin_arr);939940            Ok(())941        }942943        /// Remove admin address of the Collection. An admin address can remove itself. List of admins may become empty, in which case only Collection Owner will be able to add an Admin.944        ///945        /// # Permissions946        /// 947        /// * Collection Owner.948        /// * Collection Admin.949        /// 950        /// # Arguments951        /// 952        /// * collection_id: ID of the Collection to remove admin for.953        /// 954        /// * account_id: Address of admin to remove.955        #[weight = <T as Config>::WeightInfo::remove_collection_admin()]956        #[transactional]957        pub fn remove_collection_admin(origin, collection_id: CollectionId, account_id: T::AccountId) -> DispatchResult {958959            let sender = ensure_signed(origin)?;960            Self::check_owner_or_admin_permissions(collection_id, sender)?;961            ensure!(<AdminList<T>>::contains_key(collection_id), Error::<T>::AdminNotFound);962963            let mut admin_arr = <AdminList<T>>::get(collection_id);964            admin_arr.retain(|i| *i != account_id);965            <AdminList<T>>::insert(collection_id, admin_arr);966967            Ok(())968        }969970        /// # Permissions971        /// 972        /// * Collection Owner973        /// 974        /// # Arguments975        /// 976        /// * collection_id.977        /// 978        /// * new_sponsor.979        #[weight = <T as Config>::WeightInfo::set_collection_sponsor()]980        #[transactional]981        pub fn set_collection_sponsor(origin, collection_id: CollectionId, new_sponsor: T::AccountId) -> DispatchResult {982983            let sender = ensure_signed(origin)?;984            ensure!(<Collection<T>>::contains_key(collection_id), Error::<T>::CollectionNotFound);985986            let mut target_collection = <Collection<T>>::get(collection_id);987            ensure!(sender == target_collection.owner, Error::<T>::NoPermission);988989            target_collection.sponsorship = SponsorshipState::Unconfirmed(new_sponsor);990            <Collection<T>>::insert(collection_id, target_collection);991992            Ok(())993        }994995        /// # Permissions996        /// 997        /// * Sponsor.998        /// 999        /// # Arguments1000        /// 1001        /// * collection_id.1002        #[weight = <T as Config>::WeightInfo::confirm_sponsorship()]1003        #[transactional]1004        pub fn confirm_sponsorship(origin, collection_id: CollectionId) -> DispatchResult {10051006            let sender = ensure_signed(origin)?;1007            ensure!(<Collection<T>>::contains_key(collection_id), Error::<T>::CollectionNotFound);10081009            let mut target_collection = <Collection<T>>::get(collection_id);1010            ensure!(1011                target_collection.sponsorship.pending_sponsor() == Some(&sender),1012                Error::<T>::ConfirmUnsetSponsorFail1013            );10141015            target_collection.sponsorship = SponsorshipState::Confirmed(sender);1016            <Collection<T>>::insert(collection_id, target_collection);10171018            Ok(())1019        }10201021        /// Switch back to pay-per-own-transaction model.1022        ///1023        /// # Permissions1024        ///1025        /// * Collection owner.1026        /// 1027        /// # Arguments1028        /// 1029        /// * collection_id.1030        #[weight = <T as Config>::WeightInfo::remove_collection_sponsor()]1031        #[transactional]1032        pub fn remove_collection_sponsor(origin, collection_id: CollectionId) -> DispatchResult {10331034            let sender = ensure_signed(origin)?;1035            ensure!(<Collection<T>>::contains_key(collection_id), Error::<T>::CollectionNotFound);10361037            let mut target_collection = <Collection<T>>::get(collection_id);1038            ensure!(sender == target_collection.owner, Error::<T>::NoPermission);10391040            target_collection.sponsorship = SponsorshipState::Disabled;1041            <Collection<T>>::insert(collection_id, target_collection);10421043            Ok(())1044        }10451046        /// This method creates a concrete instance of NFT Collection created with CreateCollection method.1047        /// 1048        /// # Permissions1049        /// 1050        /// * Collection Owner.1051        /// * Collection Admin.1052        /// * Anyone if1053        ///     * White List is enabled, and1054        ///     * Address is added to white list, and1055        ///     * MintPermission is enabled (see SetMintPermission method)1056        /// 1057        /// # Arguments1058        /// 1059        /// * collection_id: ID of the collection.1060        /// 1061        /// * owner: Address, initial owner of the NFT.1062        ///1063        /// * data: Token data to store on chain.1064        // #[weight =1065        // (130_000_000 as Weight)1066        // .saturating_add((2135 as Weight).saturating_mul((properties.len() as u64) as Weight))1067        // .saturating_add(RocksDbWeight::get().reads(10 as Weight))1068        // .saturating_add(RocksDbWeight::get().writes(8 as Weight))]10691070        #[weight = <T as Config>::WeightInfo::create_item(data.len())]1071        #[transactional]1072        pub fn create_item(origin, collection_id: CollectionId, owner: T::AccountId, data: CreateItemData) -> DispatchResult {10731074            let sender = ensure_signed(origin)?;10751076            Self::collection_exists(collection_id)?;10771078            let target_collection = <Collection<T>>::get(collection_id);10791080            Self::can_create_items_in_collection(collection_id, &target_collection, &sender, &owner, 1)?;1081            Self::validate_create_item_args(&target_collection, &data)?;1082            Self::create_item_no_validation(collection_id, owner, data)?;10831084            Ok(())1085        }10861087        /// This method creates multiple items in a collection created with CreateCollection method.1088        /// 1089        /// # Permissions1090        /// 1091        /// * Collection Owner.1092        /// * Collection Admin.1093        /// * Anyone if1094        ///     * White List is enabled, and1095        ///     * Address is added to white list, and1096        ///     * MintPermission is enabled (see SetMintPermission method)1097        /// 1098        /// # Arguments1099        /// 1100        /// * collection_id: ID of the collection.1101        /// 1102        /// * itemsData: Array items properties. Each property is an array of bytes itself, see [create_item].1103        /// 1104        /// * owner: Address, initial owner of the NFT.1105        #[weight = <T as Config>::WeightInfo::create_item(items_data.into_iter()1106                               .map(|data| { data.len() })1107                               .sum())]1108        #[transactional]1109        pub fn create_multiple_items(origin, collection_id: CollectionId, owner: T::AccountId, items_data: Vec<CreateItemData>) -> DispatchResult {11101111            ensure!(items_data.len() > 0, Error::<T>::EmptyArgument);1112            let sender = ensure_signed(origin)?;11131114            Self::collection_exists(collection_id)?;1115            let target_collection = <Collection<T>>::get(collection_id);11161117            Self::can_create_items_in_collection(collection_id, &target_collection, &sender, &owner, items_data.len() as u32)?;11181119            for data in &items_data {1120                Self::validate_create_item_args(&target_collection, data)?;1121            }1122            for data in &items_data {1123                Self::create_item_no_validation(collection_id, owner.clone(), data.clone())?;1124            }11251126            Ok(())1127        }11281129        /// Destroys a concrete instance of NFT.1130        /// 1131        /// # Permissions1132        /// 1133        /// * Collection Owner.1134        /// * Collection Admin.1135        /// * Current NFT Owner.1136        /// 1137        /// # Arguments1138        /// 1139        /// * collection_id: ID of the collection.1140        /// 1141        /// * item_id: ID of NFT to burn.1142        #[weight = <T as Config>::WeightInfo::burn_item()]1143        #[transactional]1144        pub fn burn_item(origin, collection_id: CollectionId, item_id: TokenId, value: u128) -> DispatchResult {11451146            let sender = ensure_signed(origin)?;1147            Self::collection_exists(collection_id)?;11481149            // Transfer permissions check1150            let target_collection = <Collection<T>>::get(collection_id);1151            ensure!(1152                Self::is_item_owner(sender.clone(), collection_id, item_id) ||1153                (1154                    target_collection.limits.owner_can_transfer &&1155                    Self::is_owner_or_admin_permissions(collection_id, sender.clone())1156                ),1157                Error::<T>::NoPermission1158            );11591160            if target_collection.access == AccessMode::WhiteList {1161                Self::check_white_list(collection_id, &sender)?;1162            }11631164            match target_collection.mode1165            {1166                CollectionMode::NFT => Self::burn_nft_item(collection_id, item_id)?,1167                CollectionMode::Fungible(_)  => Self::burn_fungible_item(&sender, collection_id, value)?,1168                CollectionMode::ReFungible  => Self::burn_refungible_item(collection_id, item_id, &sender)?,1169                _ => ()1170            };11711172            // call event1173            Self::deposit_event(RawEvent::ItemDestroyed(collection_id, item_id));11741175            Ok(())1176        }11771178        /// Change ownership of the token.1179        /// 1180        /// # Permissions1181        /// 1182        /// * Collection Owner1183        /// * Collection Admin1184        /// * Current NFT owner1185        ///1186        /// # Arguments1187        /// 1188        /// * recipient: Address of token recipient.1189        /// 1190        /// * collection_id.1191        /// 1192        /// * item_id: ID of the item1193        ///     * Non-Fungible Mode: Required.1194        ///     * Fungible Mode: Ignored.1195        ///     * Re-Fungible Mode: Required.1196        /// 1197        /// * value: Amount to transfer.1198        ///     * Non-Fungible Mode: Ignored1199        ///     * Fungible Mode: Must specify transferred amount1200        ///     * Re-Fungible Mode: Must specify transferred portion (between 0 and 1)1201        #[weight = <T as Config>::WeightInfo::transfer()]1202        #[transactional]1203        pub fn transfer(origin, recipient: T::AccountId, collection_id: CollectionId, item_id: TokenId, value: u128) -> DispatchResult {1204            let sender = ensure_signed(origin)?;1205            Self::transfer_internal(sender, recipient, collection_id, item_id, value)1206        }12071208        /// Set, change, or remove approved address to transfer the ownership of the NFT.1209        /// 1210        /// # Permissions1211        /// 1212        /// * Collection Owner1213        /// * Collection Admin1214        /// * Current NFT owner1215        /// 1216        /// # Arguments1217        /// 1218        /// * approved: Address that is approved to transfer this NFT or zero (if needed to remove approval).1219        /// 1220        /// * collection_id.1221        /// 1222        /// * item_id: ID of the item.1223        #[weight = <T as Config>::WeightInfo::approve()]1224        #[transactional]1225        pub fn approve(origin, spender: T::AccountId, collection_id: CollectionId, item_id: TokenId, amount: u128) -> DispatchResult {12261227            let sender = ensure_signed(origin)?;12281229            Self::collection_exists(collection_id)?;1230            Self::token_exists(collection_id, item_id, &sender)?;12311232            // Transfer permissions check1233            let target_collection = <Collection<T>>::get(collection_id);12341235            let bypasses_limits = target_collection.limits.owner_can_transfer &&1236                Self::is_owner_or_admin_permissions(1237                    collection_id,1238                    sender.clone(),1239                );12401241            let allowance_limit = if bypasses_limits {1242                None1243            } else if let Some(amount) = Self::owned_amount(1244                sender.clone(),1245                collection_id,1246                item_id,1247            ) {1248                Some(amount)1249            } else {1250                fail!(Error::<T>::NoPermission);1251            };12521253            if target_collection.access == AccessMode::WhiteList {1254                Self::check_white_list(collection_id, &sender)?;1255                Self::check_white_list(collection_id, &spender)?;1256            }12571258            let allowance_exists = <Allowances<T>>::contains_key(collection_id, (item_id, &sender, &spender));1259            let mut allowance: u128 = amount;1260            if allowance_exists {1261                allowance += <Allowances<T>>::get(collection_id, (item_id, &sender, &spender));1262            }1263            if let Some(limit) = allowance_limit {1264                ensure!(limit >= allowance, Error::<T>::TokenValueTooLow);1265            }1266            <Allowances<T>>::insert(collection_id, (item_id, sender.clone(), spender.clone()), allowance);12671268            Ok(())1269        }1270        1271        /// Change ownership of a NFT on behalf of the owner. See Approve method for additional information. After this method executes, the approval is removed so that the approved address will not be able to transfer this NFT again from this owner.1272        /// 1273        /// # Permissions1274        /// * Collection Owner1275        /// * Collection Admin1276        /// * Current NFT owner1277        /// * Address approved by current NFT owner1278        /// 1279        /// # Arguments1280        /// 1281        /// * from: Address that owns token.1282        /// 1283        /// * recipient: Address of token recipient.1284        /// 1285        /// * collection_id.1286        /// 1287        /// * item_id: ID of the item.1288        /// 1289        /// * value: Amount to transfer.1290        #[weight = <T as Config>::WeightInfo::transfer_from()]1291        #[transactional]1292        pub fn transfer_from(origin, from: T::AccountId, recipient: T::AccountId, collection_id: CollectionId, item_id: TokenId, value: u128 ) -> DispatchResult {12931294            let sender = ensure_signed(origin)?;1295            let mut appoved_transfer = false;12961297            // Check approval1298            let mut approval: u128 = 0;1299            if <Allowances<T>>::contains_key(collection_id, (item_id, &from, &sender)) {1300                approval = <Allowances<T>>::get(collection_id, (item_id, &from, &sender));1301                ensure!(approval >= value, Error::<T>::TokenValueNotEnough);1302                appoved_transfer = true;1303            }13041305            let target_collection = <Collection<T>>::get(collection_id);13061307            // Limits check1308            Self::is_correct_transfer(collection_id, &target_collection, &recipient)?;13091310            // Transfer permissions check         1311            ensure!(1312                appoved_transfer || 1313                (1314                    target_collection.limits.owner_can_transfer &&1315                    Self::is_owner_or_admin_permissions(collection_id, sender.clone())1316                ),1317                Error::<T>::NoPermission1318            );13191320            if target_collection.access == AccessMode::WhiteList {1321                Self::check_white_list(collection_id, &sender)?;1322                Self::check_white_list(collection_id, &recipient)?;1323            }13241325            // Reduce approval by transferred amount or remove if remaining approval drops to 01326            if approval.saturating_sub(value) > 0 {1327                <Allowances<T>>::insert(collection_id, (item_id, &from, &sender), approval - value);1328            }1329            else {1330                <Allowances<T>>::remove(collection_id, (item_id, &from, &sender));1331            }13321333            match target_collection.mode1334            {1335                CollectionMode::NFT => Self::transfer_nft(collection_id, item_id, from, recipient)?,1336                CollectionMode::Fungible(_)  => Self::transfer_fungible(collection_id, value, &from, &recipient)?,1337                CollectionMode::ReFungible  => Self::transfer_refungible(collection_id, item_id, value, from.clone(), recipient)?,1338                _ => ()1339            };13401341            Ok(())1342        }13431344        // #[weight = 0]1345        // pub fn safe_transfer_from(origin, collection_id: CollectionId, item_id: TokenId, new_owner: T::AccountId) -> DispatchResult {13461347        //     // let no_perm_mes = "You do not have permissions to modify this collection";1348        //     // ensure!(<ApprovedList<T>>::contains_key((collection_id, item_id)), no_perm_mes);1349        //     // let list_itm = <ApprovedList<T>>::get((collection_id, item_id));1350        //     // ensure!(list_itm.contains(&new_owner.clone()), no_perm_mes);13511352        //     // // on_nft_received  call13531354        //     // Self::transfer(origin, collection_id, item_id, new_owner)?;13551356        //     Ok(())1357        // }13581359        /// Set off-chain data schema.1360        /// 1361        /// # Permissions1362        /// 1363        /// * Collection Owner1364        /// * Collection Admin1365        /// 1366        /// # Arguments1367        /// 1368        /// * collection_id.1369        /// 1370        /// * schema: String representing the offchain data schema.1371        #[weight = <T as Config>::WeightInfo::set_variable_meta_data()]1372        #[transactional]1373        pub fn set_variable_meta_data (1374            origin,1375            collection_id: CollectionId,1376            item_id: TokenId,1377            data: Vec<u8>1378        ) -> DispatchResult {1379            let sender = ensure_signed(origin)?;1380            1381            Self::collection_exists(collection_id)?;1382            Self::token_exists(collection_id, item_id, &sender)?;13831384            ensure!(ChainLimit::get().custom_data_limit >= data.len() as u32, Error::<T>::TokenVariableDataLimitExceeded);13851386            // Modify permissions check1387            let target_collection = <Collection<T>>::get(collection_id);1388            ensure!(Self::is_item_owner(sender.clone(), collection_id, item_id) ||1389                Self::is_owner_or_admin_permissions(collection_id, sender.clone()),1390                Error::<T>::NoPermission);13911392            match target_collection.mode1393            {1394                CollectionMode::NFT => Self::set_nft_variable_data(collection_id, item_id, data)?,1395                CollectionMode::ReFungible  => Self::set_re_fungible_variable_data(collection_id, item_id, data)?,1396                CollectionMode::Fungible(_) => fail!(Error::<T>::CantStoreMetadataInFungibleTokens),1397                _ => fail!(Error::<T>::UnexpectedCollectionType)1398            };13991400            Ok(())1401        }1402 1403        /// Set schema standard1404        /// ImageURL1405        /// Unique1406        /// 1407        /// # Permissions1408        /// 1409        /// * Collection Owner1410        /// * Collection Admin1411        /// 1412        /// # Arguments1413        /// 1414        /// * collection_id.1415        /// 1416        /// * schema: SchemaVersion: enum1417        #[weight = <T as Config>::WeightInfo::set_schema_version()]1418        #[transactional]1419        pub fn set_schema_version(1420            origin,1421            collection_id: CollectionId,1422            version: SchemaVersion1423        ) -> DispatchResult {1424            let sender = ensure_signed(origin)?;1425            Self::check_owner_or_admin_permissions(collection_id, sender.clone())?;1426            let mut target_collection = <Collection<T>>::get(collection_id);1427            target_collection.schema_version = version;1428            <Collection<T>>::insert(collection_id, target_collection);14291430            Ok(())1431        }14321433        /// Set off-chain data schema.1434        /// 1435        /// # Permissions1436        /// 1437        /// * Collection Owner1438        /// * Collection Admin1439        /// 1440        /// # Arguments1441        /// 1442        /// * collection_id.1443        /// 1444        /// * schema: String representing the offchain data schema.1445        #[weight = <T as Config>::WeightInfo::set_offchain_schema()]1446        #[transactional]1447        pub fn set_offchain_schema(1448            origin,1449            collection_id: CollectionId,1450            schema: Vec<u8>1451        ) -> DispatchResult {1452            let sender = ensure_signed(origin)?;1453            Self::check_owner_or_admin_permissions(collection_id, sender.clone())?;14541455            // check schema limit1456            ensure!(schema.len() as u32 <= ChainLimit::get().offchain_schema_limit, "");14571458            let mut target_collection = <Collection<T>>::get(collection_id);1459            target_collection.offchain_schema = schema;1460            <Collection<T>>::insert(collection_id, target_collection);14611462            Ok(())1463        }14641465        /// Set const on-chain data schema.1466        /// 1467        /// # Permissions1468        /// 1469        /// * Collection Owner1470        /// * Collection Admin1471        /// 1472        /// # Arguments1473        /// 1474        /// * collection_id.1475        /// 1476        /// * schema: String representing the const on-chain data schema.1477        #[weight = <T as Config>::WeightInfo::set_const_on_chain_schema()]1478        #[transactional]1479        pub fn set_const_on_chain_schema (1480            origin,1481            collection_id: CollectionId,1482            schema: Vec<u8>1483        ) -> DispatchResult {1484            let sender = ensure_signed(origin)?;1485            Self::check_owner_or_admin_permissions(collection_id, sender.clone())?;14861487            // check schema limit1488            ensure!(schema.len() as u32 <= ChainLimit::get().const_on_chain_schema_limit, "");14891490            let mut target_collection = <Collection<T>>::get(collection_id);1491            target_collection.const_on_chain_schema = schema;1492            <Collection<T>>::insert(collection_id, target_collection);14931494            Ok(())1495        }14961497        /// Set variable on-chain data schema.1498        /// 1499        /// # Permissions1500        /// 1501        /// * Collection Owner1502        /// * Collection Admin1503        /// 1504        /// # Arguments1505        /// 1506        /// * collection_id.1507        /// 1508        /// * schema: String representing the variable on-chain data schema.1509        #[weight = <T as Config>::WeightInfo::set_const_on_chain_schema()]1510        #[transactional]1511        pub fn set_variable_on_chain_schema (1512            origin,1513            collection_id: CollectionId,1514            schema: Vec<u8>1515        ) -> DispatchResult {1516            let sender = ensure_signed(origin)?;1517            Self::check_owner_or_admin_permissions(collection_id, sender.clone())?;15181519            // check schema limit1520            ensure!(schema.len() as u32 <= ChainLimit::get().variable_on_chain_schema_limit, "");15211522            let mut target_collection = <Collection<T>>::get(collection_id);1523            target_collection.variable_on_chain_schema = schema;1524            <Collection<T>>::insert(collection_id, target_collection);15251526            Ok(())1527        }15281529        // Sudo permissions function1530        #[weight = <T as Config>::WeightInfo::set_chain_limits()]1531        #[transactional]1532        pub fn set_chain_limits(1533            origin,1534            limits: ChainLimits1535        ) -> DispatchResult {15361537            #[cfg(not(feature = "runtime-benchmarks"))]1538            ensure_root(origin)?;15391540            <ChainLimit>::put(limits);1541            Ok(())1542        }15431544        /// Enable smart contract self-sponsoring.1545        /// 1546        /// # Permissions1547        /// 1548        /// * Contract Owner1549        /// 1550        /// # Arguments1551        /// 1552        /// * contract address1553        /// * enable flag1554        /// 1555        #[weight = <T as Config>::WeightInfo::enable_contract_sponsoring()]1556        #[transactional]1557        pub fn enable_contract_sponsoring(1558            origin,1559            contract_address: T::AccountId,1560            enable: bool1561        ) -> DispatchResult {15621563            let sender = ensure_signed(origin)?;15641565            #[cfg(feature = "runtime-benchmarks")]1566            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());15671568            Self::ensure_contract_owned(sender, &contract_address)?;15691570            <ContractSelfSponsoring<T>>::insert(contract_address, enable);1571            Ok(())1572        }15731574        /// Set the rate limit for contract sponsoring to specified number of blocks.1575        /// 1576        /// If not set (has the default value of 0 blocks), the sponsoring will be disabled. 1577        /// If set to the number B (for blocks), the transactions will be sponsored with a rate 1578        /// limit of B, i.e. fees for every transaction sent to this smart contract will be paid 1579        /// from contract endowment if there are at least B blocks between such transactions. 1580        /// Nonetheless, if transactions are sent more frequently, the fees are paid by the sender.1581        /// 1582        /// # Permissions1583        /// 1584        /// * Contract Owner1585        /// 1586        /// # Arguments1587        /// 1588        /// -`contract_address`: Address of the contract to sponsor1589        /// -`rate_limit`: Number of blocks to wait until the next sponsored transaction is allowed1590        /// 1591        #[weight = <T as Config>::WeightInfo::set_contract_sponsoring_rate_limit()]1592        #[transactional]1593        pub fn set_contract_sponsoring_rate_limit(1594            origin,1595            contract_address: T::AccountId,1596            rate_limit: T::BlockNumber1597        ) -> DispatchResult {1598            let sender = ensure_signed(origin)?;15991600            #[cfg(feature = "runtime-benchmarks")]1601            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());16021603            Self::ensure_contract_owned(sender, &contract_address)?;1604            <ContractSponsoringRateLimit<T>>::insert(contract_address, rate_limit);1605            Ok(())1606        }16071608        /// Enable the white list for a contract. Only addresses added to the white list with addToContractWhiteList will be able to call this smart contract.1609        /// 1610        /// # Permissions1611        /// 1612        /// * Address that deployed smart contract.1613        /// 1614        /// # Arguments1615        /// 1616        /// -`contract_address`: Address of the contract.1617        /// 1618        /// - `enable`: .  1619        #[weight = <T as Config>::WeightInfo::toggle_contract_white_list()]1620        #[transactional]1621        pub fn toggle_contract_white_list(1622            origin,1623            contract_address: T::AccountId,1624            enable: bool1625        ) -> DispatchResult {1626            let sender = ensure_signed(origin)?;16271628            #[cfg(feature = "runtime-benchmarks")]1629            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());16301631            Self::ensure_contract_owned(sender, &contract_address)?;1632            <ContractWhiteListEnabled<T>>::insert(contract_address, enable);1633            Ok(())1634        }1635        1636        /// Add an address to smart contract white list.1637        /// 1638        /// # Permissions1639        /// 1640        /// * Address that deployed smart contract.1641        /// 1642        /// # Arguments1643        /// 1644        /// -`contract_address`: Address of the contract.1645        ///1646        /// -`account_address`: Address to add.1647        #[weight = <T as Config>::WeightInfo::add_to_contract_white_list()]1648        #[transactional]1649        pub fn add_to_contract_white_list(1650            origin,1651            contract_address: T::AccountId,1652            account_address: T::AccountId1653        ) -> DispatchResult {1654            let sender = ensure_signed(origin)?;16551656            #[cfg(feature = "runtime-benchmarks")]1657            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());1658            1659            Self::ensure_contract_owned(sender, &contract_address)?;      1660            <ContractWhiteList<T>>::insert(contract_address, account_address, true);1661            Ok(())1662        }16631664        /// Remove an address from smart contract white list.1665        /// 1666        /// # Permissions1667        /// 1668        /// * Address that deployed smart contract.1669        /// 1670        /// # Arguments1671        /// 1672        /// -`contract_address`: Address of the contract.1673        ///1674        /// -`account_address`: Address to remove.1675        #[weight = <T as Config>::WeightInfo::remove_from_contract_white_list()]1676        #[transactional]1677        pub fn remove_from_contract_white_list(1678            origin,1679            contract_address: T::AccountId,1680            account_address: T::AccountId1681        ) -> DispatchResult {1682            let sender = ensure_signed(origin)?;16831684            #[cfg(feature = "runtime-benchmarks")]1685            <ContractOwner<T>>::insert(contract_address.clone(), sender.clone());16861687            Self::ensure_contract_owned(sender, &contract_address)?;1688            <ContractWhiteList<T>>::remove(contract_address, account_address);1689            Ok(())1690        }16911692        #[weight = <T as Config>::WeightInfo::set_collection_limits()]1693        #[transactional]1694        pub fn set_collection_limits(1695            origin,1696            collection_id: u32,1697            new_limits: CollectionLimits,1698        ) -> DispatchResult {1699            let sender = ensure_signed(origin)?;1700            Self::check_owner_permissions(collection_id, sender.clone())?;1701            let mut target_collection = <Collection<T>>::get(collection_id);1702            let old_limits = target_collection.limits;1703            let chain_limits = ChainLimit::get();17041705            // collection bounds1706            ensure!(new_limits.sponsor_transfer_timeout <= MAX_SPONSOR_TIMEOUT &&1707                new_limits.account_token_ownership_limit <= MAX_TOKEN_OWNERSHIP && 1708                new_limits.sponsored_data_size <= chain_limits.custom_data_limit,1709                Error::<T>::CollectionLimitBoundsExceeded);17101711            // token_limit   check  prev1712            ensure!(old_limits.token_limit >= new_limits.token_limit, Error::<T>::CollectionTokenLimitExceeded);1713            ensure!(new_limits.token_limit > 0, Error::<T>::CollectionTokenLimitExceeded);17141715            ensure!(1716                (old_limits.owner_can_transfer || !new_limits.owner_can_transfer) &&1717                (old_limits.owner_can_destroy || !new_limits.owner_can_destroy),1718                Error::<T>::OwnerPermissionsCantBeReverted,1719            );17201721            target_collection.limits = new_limits;1722            <Collection<T>>::insert(collection_id, target_collection);17231724            Ok(())1725        } 1726    }1727}17281729impl<T: Config> Module<T> {17301731    pub fn transfer_internal(sender: T::AccountId, recipient: T::AccountId, collection_id: CollectionId, item_id: TokenId, value: u128) -> DispatchResult {17321733        let target_collection = <Collection<T>>::get(collection_id);17341735        // Limits check1736        Self::is_correct_transfer(collection_id, &target_collection, &recipient)?;17371738        // Transfer permissions check1739        ensure!(Self::is_item_owner(sender.clone(), collection_id, item_id) ||1740            Self::is_owner_or_admin_permissions(collection_id, sender.clone()),1741            Error::<T>::NoPermission);17421743        if target_collection.access == AccessMode::WhiteList {1744            Self::check_white_list(collection_id, &sender)?;1745            Self::check_white_list(collection_id, &recipient)?;1746        }17471748        match target_collection.mode1749        {1750            CollectionMode::NFT => Self::transfer_nft(collection_id, item_id, sender.clone(), recipient.clone())?,1751            CollectionMode::Fungible(_)  => Self::transfer_fungible(collection_id, value, &sender, &recipient)?,1752            CollectionMode::ReFungible  => Self::transfer_refungible(collection_id, item_id, value, sender.clone(), recipient.clone())?,1753            _ => ()1754        };17551756        Self::deposit_event(RawEvent::Transfer(collection_id, item_id, sender, recipient, value));17571758        Ok(())1759    }176017611762    fn is_correct_transfer(collection_id: CollectionId, collection: &CollectionType<T::AccountId>, recipient: &T::AccountId) -> DispatchResult {17631764        // check token limit and account token limit1765        let account_items: u32 = <AddressTokens<T>>::get(collection_id, recipient).len() as u32;1766        ensure!(collection.limits.account_token_ownership_limit > account_items,  Error::<T>::AccountTokenLimitExceeded);1767        1768        Ok(())1769    }17701771    fn can_create_items_in_collection(collection_id: CollectionId, collection: &CollectionType<T::AccountId>, sender: &T::AccountId, owner: &T::AccountId, amount: u32) -> DispatchResult {17721773        // check token limit and account token limit1774        let total_items: u32 = ItemListIndex::get(collection_id)1775            .checked_add(amount)1776            .ok_or(Error::<T>::CollectionTokenLimitExceeded)?;1777        let account_items: u32 = (<AddressTokens<T>>::get(collection_id, owner).len() as u32)1778            .checked_add(amount)1779            .ok_or(Error::<T>::AccountTokenLimitExceeded)?;1780        ensure!(collection.limits.token_limit >= total_items,  Error::<T>::CollectionTokenLimitExceeded);1781        ensure!(collection.limits.account_token_ownership_limit >= account_items,  Error::<T>::AccountTokenLimitExceeded);17821783        if !Self::is_owner_or_admin_permissions(collection_id, sender.clone()) {1784            ensure!(collection.mint_mode == true, Error::<T>::PublicMintingNotAllowed);1785            Self::check_white_list(collection_id, owner)?;1786            Self::check_white_list(collection_id, sender)?;1787        }17881789        Ok(())1790    }17911792    fn validate_create_item_args(target_collection: &CollectionType<T::AccountId>, data: &CreateItemData) -> DispatchResult {1793        match target_collection.mode1794        {1795            CollectionMode::NFT => {1796                if let CreateItemData::NFT(data) = data {1797                    // check sizes1798                    ensure!(ChainLimit::get().custom_data_limit >= data.const_data.len() as u32, Error::<T>::TokenConstDataLimitExceeded);1799                    ensure!(ChainLimit::get().custom_data_limit >= data.variable_data.len() as u32, Error::<T>::TokenVariableDataLimitExceeded);1800                } else {1801                    fail!(Error::<T>::NotNftDataUsedToMintNftCollectionToken);1802                }1803            },1804            CollectionMode::Fungible(_) => {1805                if let CreateItemData::Fungible(_) = data {1806                } else {1807                    fail!(Error::<T>::NotFungibleDataUsedToMintFungibleCollectionToken);1808                }1809            },1810            CollectionMode::ReFungible => {1811                if let CreateItemData::ReFungible(data) = data {18121813                    // check sizes1814                    ensure!(ChainLimit::get().custom_data_limit >= data.const_data.len() as u32, Error::<T>::TokenConstDataLimitExceeded);1815                    ensure!(ChainLimit::get().custom_data_limit >= data.variable_data.len() as u32, Error::<T>::TokenVariableDataLimitExceeded);18161817                    // Check refungibility limits1818                    ensure!(data.pieces <= MAX_REFUNGIBLE_PIECES, Error::<T>::WrongRefungiblePieces);1819                    ensure!(data.pieces > 0, Error::<T>::WrongRefungiblePieces);1820                } else {1821                    fail!(Error::<T>::NotReFungibleDataUsedToMintReFungibleCollectionToken);1822                }1823            },1824            _ => { fail!(Error::<T>::UnexpectedCollectionType); }1825        };18261827        Ok(())1828    }18291830    fn create_item_no_validation(collection_id: CollectionId, owner: T::AccountId, data: CreateItemData) -> DispatchResult {1831        match data1832        {1833            CreateItemData::NFT(data) => {1834                let item = NftItemType {1835                    owner: owner.clone(),1836                    const_data: data.const_data,1837                    variable_data: data.variable_data1838                };18391840                Self::add_nft_item(collection_id, item)?;1841            },1842            CreateItemData::Fungible(data) => {1843                Self::add_fungible_item(collection_id, &owner, data.value)?;1844            },1845            CreateItemData::ReFungible(data) => {1846                let mut owner_list = Vec::new();1847                owner_list.push(Ownership {owner: owner.clone(), fraction: data.pieces});18481849                let item = ReFungibleItemType {1850                    owner: owner_list,1851                    const_data: data.const_data,1852                    variable_data: data.variable_data1853                };18541855                Self::add_refungible_item(collection_id, item)?;1856            }1857        };18581859        Ok(())1860    }18611862    fn add_fungible_item(collection_id: CollectionId, owner: &T::AccountId, value: u128) -> DispatchResult {18631864        // Does new owner already have an account?1865        let mut balance: u128 = 0;1866        if <FungibleItemList<T>>::contains_key(collection_id, owner) {1867            balance = <FungibleItemList<T>>::get(collection_id, owner).value;1868        } 18691870        // Mint 1871        let item = FungibleItemType {1872            value: balance + value1873        };1874        <FungibleItemList<T>>::insert(collection_id, (*owner).clone(), item);18751876        // Update balance1877        let new_balance = <Balance<T>>::get(collection_id, owner)1878            .checked_add(value)1879            .ok_or(Error::<T>::NumOverflow)?;1880        <Balance<T>>::insert(collection_id, (*owner).clone(), new_balance);18811882        Self::deposit_event(RawEvent::ItemCreated(collection_id, 0, owner.clone()));1883        Ok(())1884    }18851886    fn add_refungible_item(collection_id: CollectionId, item: ReFungibleItemType<T::AccountId>) -> DispatchResult {1887        let current_index = <ItemListIndex>::get(collection_id)1888            .checked_add(1)1889            .ok_or(Error::<T>::NumOverflow)?;1890        let itemcopy = item.clone();18911892        ensure!(1893            item.owner.len() == 1,1894            Error::<T>::BadCreateRefungibleCall,1895        );1896        let item_owner = item.owner.first().expect("only one owner is defined");18971898        let value = item_owner.fraction;1899        let owner = item_owner.owner.clone();19001901        Self::add_token_index(collection_id, current_index, &owner)?;19021903        <ItemListIndex>::insert(collection_id, current_index);1904        <ReFungibleItemList<T>>::insert(collection_id, current_index, itemcopy);19051906        // Update balance1907        let new_balance = <Balance<T>>::get(collection_id, &owner)1908            .checked_add(value)1909            .ok_or(Error::<T>::NumOverflow)?;1910        <Balance<T>>::insert(collection_id, owner.clone(), new_balance);19111912        Self::deposit_event(RawEvent::ItemCreated(collection_id, current_index, owner));1913        Ok(())1914    }19151916    fn add_nft_item(collection_id: CollectionId, item: NftItemType<T::AccountId>) -> DispatchResult {1917        let current_index = <ItemListIndex>::get(collection_id)1918            .checked_add(1)1919            .ok_or(Error::<T>::NumOverflow)?;19201921        let item_owner = item.owner.clone();1922        Self::add_token_index(collection_id, current_index, &item.owner)?;19231924        <ItemListIndex>::insert(collection_id, current_index);1925        <NftItemList<T>>::insert(collection_id, current_index, item);19261927        // Update balance1928        let new_balance = <Balance<T>>::get(collection_id, item_owner.clone())1929            .checked_add(1)1930            .ok_or(Error::<T>::NumOverflow)?;1931        <Balance<T>>::insert(collection_id, item_owner.clone(), new_balance);19321933        Self::deposit_event(RawEvent::ItemCreated(collection_id, current_index, item_owner));1934        Ok(())1935    }19361937    fn burn_refungible_item(1938        collection_id: CollectionId,1939        item_id: TokenId,1940        owner: &T::AccountId,1941    ) -> DispatchResult {1942        ensure!(1943            <ReFungibleItemList<T>>::contains_key(collection_id, item_id),1944            Error::<T>::TokenNotFound1945        );1946        let mut token = <ReFungibleItemList<T>>::get(collection_id, item_id);1947        let rft_balance = token1948            .owner1949            .iter()1950            .find(|&i| i.owner == *owner)1951            .ok_or(Error::<T>::TokenNotFound)?;1952        Self::remove_token_index(collection_id, item_id, owner)?;19531954        // update balance1955        let new_balance = <Balance<T>>::get(collection_id, rft_balance.owner.clone())1956            .checked_sub(rft_balance.fraction)1957            .ok_or(Error::<T>::NumOverflow)?;1958        <Balance<T>>::insert(collection_id, rft_balance.owner.clone(), new_balance);19591960        // Re-create owners list with sender removed1961        let index = token1962            .owner1963            .iter()1964            .position(|i| i.owner == *owner)1965            .expect("owned item is exists");1966        token.owner.remove(index);1967        let owner_count = token.owner.len();19681969        // Burn the token completely if this was the last (only) owner1970        if owner_count == 0 {1971            <ReFungibleItemList<T>>::remove(collection_id, item_id);1972        }1973        else {1974            <ReFungibleItemList<T>>::insert(collection_id, item_id, token);1975        }19761977        Ok(())1978    }19791980    fn burn_nft_item(collection_id: CollectionId, item_id: TokenId) -> DispatchResult {1981        ensure!(1982            <NftItemList<T>>::contains_key(collection_id, item_id),1983            Error::<T>::TokenNotFound1984        );1985        let item = <NftItemList<T>>::get(collection_id, item_id);1986        Self::remove_token_index(collection_id, item_id, &item.owner)?;19871988        // update balance1989        let new_balance = <Balance<T>>::get(collection_id, &item.owner)1990            .checked_sub(1)1991            .ok_or(Error::<T>::NumOverflow)?;1992        <Balance<T>>::insert(collection_id, item.owner.clone(), new_balance);1993        <NftItemList<T>>::remove(collection_id, item_id);19941995        Ok(())1996    }19971998    fn burn_fungible_item(owner: &T::AccountId, collection_id: CollectionId, value: u128) -> DispatchResult {1999        ensure!(2000            <FungibleItemList<T>>::contains_key(collection_id, owner),2001            Error::<T>::TokenNotFound2002        );2003        let mut balance = <FungibleItemList<T>>::get(collection_id, owner);2004        ensure!(balance.value >= value, Error::<T>::TokenValueNotEnough);20052006        // update balance2007        let new_balance = <Balance<T>>::get(collection_id, owner)2008            .checked_sub(value)2009            .ok_or(Error::<T>::NumOverflow)?;2010        <Balance<T>>::insert(collection_id, (*owner).clone(), new_balance);20112012        if balance.value - value > 0 {2013            balance.value -= value;2014            <FungibleItemList<T>>::insert(collection_id, (*owner).clone(), balance);2015        }2016        else {2017            <FungibleItemList<T>>::remove(collection_id, owner);2018        }20192020        Ok(())2021    }20222023    fn collection_exists(collection_id: CollectionId) -> DispatchResult {2024        ensure!(2025            <Collection<T>>::contains_key(collection_id),2026            Error::<T>::CollectionNotFound2027        );2028        Ok(())2029    }20302031    fn check_owner_permissions(collection_id: CollectionId, subject: T::AccountId) -> DispatchResult {2032        Self::collection_exists(collection_id)?;20332034        let target_collection = <Collection<T>>::get(collection_id);2035        ensure!(2036            subject == target_collection.owner,2037            Error::<T>::NoPermission2038        );20392040        Ok(())2041    }20422043    fn is_owner_or_admin_permissions(collection_id: CollectionId, subject: T::AccountId) -> bool {2044        let target_collection = <Collection<T>>::get(collection_id);2045        let mut result: bool = subject == target_collection.owner;2046        let exists = <AdminList<T>>::contains_key(collection_id);20472048        if !result & exists {2049            if <AdminList<T>>::get(collection_id).contains(&subject) {2050                result = true2051            }2052        }20532054        result2055    }20562057    fn check_owner_or_admin_permissions(2058        collection_id: CollectionId,2059        subject: T::AccountId,2060    ) -> DispatchResult {2061        Self::collection_exists(collection_id)?;2062        let result = Self::is_owner_or_admin_permissions(collection_id, subject.clone());20632064        ensure!(2065            result,2066            Error::<T>::NoPermission2067        );2068        Ok(())2069    }20702071    fn owned_amount(2072        subject: T::AccountId,2073        collection_id: CollectionId,2074        item_id: TokenId,2075    ) -> Option<u128> {2076        let target_collection = <Collection<T>>::get(collection_id);20772078        match target_collection.mode {2079            CollectionMode::NFT => {2080                if <NftItemList<T>>::get(collection_id, item_id).owner == subject {2081                    return Some(1)2082                }2083                None2084            },2085            CollectionMode::Fungible(_) => {2086                if <FungibleItemList<T>>::contains_key(collection_id, &subject) {2087                    return Some(<FungibleItemList<T>>::get(collection_id, &subject)2088                        .value);2089                }2090                None2091            },2092            CollectionMode::ReFungible => <ReFungibleItemList<T>>::get(collection_id, item_id)2093                .owner2094                .iter()2095                .find(|i| i.owner == subject)2096                .map(|i| i.fraction),2097            CollectionMode::Invalid => None,2098        }2099    }21002101    fn is_item_owner(subject: T::AccountId, collection_id: CollectionId, item_id: TokenId) -> bool {2102        let target_collection = <Collection<T>>::get(collection_id);21032104        match target_collection.mode {2105            CollectionMode::NFT => {2106                <NftItemList<T>>::get(collection_id, item_id).owner == subject2107            }2108            CollectionMode::Fungible(_) => {2109                <FungibleItemList<T>>::contains_key(collection_id, &subject)2110            }2111            CollectionMode::ReFungible => {2112                <ReFungibleItemList<T>>::get(collection_id, item_id)2113                    .owner2114                    .iter()2115                    .any(|i| i.owner == subject)2116            }2117            CollectionMode::Invalid => false,2118        }2119    }21202121    fn check_white_list(collection_id: CollectionId, address: &T::AccountId) -> DispatchResult {2122        let mes = Error::<T>::AddresNotInWhiteList;2123        ensure!(<WhiteList<T>>::contains_key(collection_id, address), mes);21242125        Ok(())2126    }21272128    /// Check if token exists. In case of Fungible, check if there is an entry for 2129    /// the owner in fungible balances double map2130    fn token_exists(2131        collection_id: CollectionId,2132        item_id: TokenId,2133        owner: &T::AccountId2134    ) -> DispatchResult {2135        let target_collection = <Collection<T>>::get(collection_id);2136        let exists = match target_collection.mode2137        {2138            CollectionMode::NFT => <NftItemList<T>>::contains_key(collection_id, item_id),2139            CollectionMode::Fungible(_)  => <FungibleItemList<T>>::contains_key(collection_id, owner),2140            CollectionMode::ReFungible  => <ReFungibleItemList<T>>::contains_key(collection_id, item_id),2141            _ => false2142        };21432144        ensure!(exists == true, Error::<T>::TokenNotFound);2145        Ok(())2146    }21472148    fn transfer_fungible(2149        collection_id: CollectionId,2150        value: u128,2151        owner: &T::AccountId,2152        recipient: &T::AccountId,2153    ) -> DispatchResult {2154        Self::token_exists(collection_id, 0, owner)?;21552156        let mut balance = <FungibleItemList<T>>::get(collection_id, owner);2157        ensure!(balance.value >= value, Error::<T>::TokenValueTooLow);21582159        // Send balance to recipient (updates balanceOf of recipient)2160        Self::add_fungible_item(collection_id, recipient, value)?;21612162        // update balanceOf of sender2163        <Balance<T>>::insert(collection_id, (*owner).clone(), balance.value - value);21642165        // Reduce or remove sender2166        if balance.value == value {2167            <FungibleItemList<T>>::remove(collection_id, owner);2168        }2169        else {2170            balance.value -= value;2171            <FungibleItemList<T>>::insert(collection_id, (*owner).clone(), balance);2172        }21732174        Ok(())2175    }21762177    fn transfer_refungible(2178        collection_id: CollectionId,2179        item_id: TokenId,2180        value: u128,2181        owner: T::AccountId,2182        new_owner: T::AccountId,2183    ) -> DispatchResult {2184        Self::token_exists(collection_id, item_id, &owner)?;21852186        let full_item = <ReFungibleItemList<T>>::get(collection_id, item_id);2187        let item = full_item2188            .owner2189            .iter()2190            .filter(|i| i.owner == owner)2191            .next()2192            .ok_or(Error::<T>::TokenNotFound)?;2193        let amount = item.fraction;21942195        ensure!(amount >= value, Error::<T>::TokenValueTooLow);21962197        // update balance2198        let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.clone())2199            .checked_sub(value)2200            .ok_or(Error::<T>::NumOverflow)?;2201        <Balance<T>>::insert(collection_id, item.owner.clone(), balance_old_owner);22022203        let balance_new_owner = <Balance<T>>::get(collection_id, new_owner.clone())2204            .checked_add(value)2205            .ok_or(Error::<T>::NumOverflow)?;2206        <Balance<T>>::insert(collection_id, new_owner.clone(), balance_new_owner);22072208        let old_owner = item.owner.clone();2209        let new_owner_has_account = full_item.owner.iter().any(|i| i.owner == new_owner);22102211        // transfer2212        if amount == value && !new_owner_has_account {2213            // change owner2214            // new owner do not have account2215            let mut new_full_item = full_item.clone();2216            new_full_item2217                .owner2218                .iter_mut()2219                .find(|i| i.owner == owner)2220                .expect("old owner does present in refungible")2221                .owner = new_owner.clone();2222            <ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);22232224            // update index collection2225            Self::move_token_index(collection_id, item_id, &old_owner, &new_owner)?;2226        } else {2227            let mut new_full_item = full_item.clone();2228            new_full_item2229                .owner2230                .iter_mut()2231                .find(|i| i.owner == owner)2232                .expect("old owner does present in refungible")2233                .fraction -= value;22342235            // separate amount2236            if new_owner_has_account {2237                // new owner has account2238                new_full_item2239                    .owner2240                    .iter_mut()2241                    .find(|i| i.owner == new_owner)2242                    .expect("new owner has account")2243                    .fraction += value;2244            } else {2245                // new owner do not have account2246                new_full_item.owner.push(Ownership {2247                    owner: new_owner.clone(),2248                    fraction: value,2249                });2250                Self::add_token_index(collection_id, item_id, &new_owner)?;2251            }22522253            <ReFungibleItemList<T>>::insert(collection_id, item_id, new_full_item);2254        }22552256        Ok(())2257    }22582259    fn transfer_nft(2260        collection_id: CollectionId,2261        item_id: TokenId,2262        sender: T::AccountId,2263        new_owner: T::AccountId,2264    ) -> DispatchResult {2265        Self::token_exists(collection_id, item_id, &sender)?;22662267        let mut item = <NftItemList<T>>::get(collection_id, item_id);22682269        ensure!(2270            sender == item.owner,2271            Error::<T>::MustBeTokenOwner2272        );22732274        // update balance2275        let balance_old_owner = <Balance<T>>::get(collection_id, item.owner.clone())2276            .checked_sub(1)2277            .ok_or(Error::<T>::NumOverflow)?;2278        <Balance<T>>::insert(collection_id, item.owner.clone(), balance_old_owner);22792280        let balancenew_owner = <Balance<T>>::get(collection_id, new_owner.clone())2281            .checked_add(1)2282            .ok_or(Error::<T>::NumOverflow)?;2283        <Balance<T>>::insert(collection_id, new_owner.clone(), balancenew_owner);22842285        // change owner2286        let old_owner = item.owner.clone();2287        item.owner = new_owner.clone();2288        <NftItemList<T>>::insert(collection_id, item_id, item);22892290        // update index collection2291        Self::move_token_index(collection_id, item_id, &old_owner, &new_owner)?;22922293        Ok(())2294    }2295    2296    fn set_re_fungible_variable_data(2297        collection_id: CollectionId,2298        item_id: TokenId,2299        data: Vec<u8>2300    ) -> DispatchResult {2301        let mut item = <ReFungibleItemList<T>>::get(collection_id, item_id);23022303        item.variable_data = data;23042305        <ReFungibleItemList<T>>::insert(collection_id, item_id, item);23062307        Ok(())2308    }23092310    fn set_nft_variable_data(2311        collection_id: CollectionId,2312        item_id: TokenId,2313        data: Vec<u8>2314    ) -> DispatchResult {2315        let mut item = <NftItemList<T>>::get(collection_id, item_id);2316        2317        item.variable_data = data;23182319        <NftItemList<T>>::insert(collection_id, item_id, item);2320        2321        Ok(())2322    }23232324    fn init_collection(item: &CollectionType<T::AccountId>) {2325        // check params2326        assert!(2327            item.decimal_points <= MAX_DECIMAL_POINTS,2328            "decimal_points parameter must be lower than MAX_DECIMAL_POINTS"2329        );2330        assert!(2331            item.name.len() <= 64,2332            "Collection name can not be longer than 63 char"2333        );2334        assert!(2335            item.name.len() <= 256,2336            "Collection description can not be longer than 255 char"2337        );2338        assert!(2339            item.token_prefix.len() <= 16,2340            "Token prefix can not be longer than 15 char"2341        );23422343        // Generate next collection ID2344        let next_id = CreatedCollectionCount::get()2345            .checked_add(1)2346            .unwrap();23472348        CreatedCollectionCount::put(next_id);2349    }23502351    fn init_nft_token(collection_id: CollectionId, item: &NftItemType<T::AccountId>) {2352        let current_index = <ItemListIndex>::get(collection_id)2353            .checked_add(1)2354            .unwrap();23552356        let item_owner = item.owner.clone();2357        Self::add_token_index(collection_id, current_index, &item.owner).unwrap();23582359        <ItemListIndex>::insert(collection_id, current_index);23602361        // Update balance2362        let new_balance = <Balance<T>>::get(collection_id, &item_owner)2363            .checked_add(1)2364            .unwrap();2365        <Balance<T>>::insert(collection_id, item_owner.clone(), new_balance);2366    }23672368    fn init_fungible_token(collection_id: CollectionId, owner: &T::AccountId, item: &FungibleItemType) {2369        let current_index = <ItemListIndex>::get(collection_id)2370            .checked_add(1)2371            .unwrap();23722373        Self::add_token_index(collection_id, current_index, owner).unwrap();23742375        <ItemListIndex>::insert(collection_id, current_index);23762377        // Update balance2378        let new_balance = <Balance<T>>::get(collection_id, owner)2379            .checked_add(item.value)2380            .unwrap();2381        <Balance<T>>::insert(collection_id, (*owner).clone(), new_balance);2382    }23832384    fn init_refungible_token(collection_id: CollectionId, item: &ReFungibleItemType<T::AccountId>) {2385        let current_index = <ItemListIndex>::get(collection_id)2386            .checked_add(1)2387            .unwrap();23882389        let value = item.owner.first().unwrap().fraction;2390        let owner = item.owner.first().unwrap().owner.clone();23912392        Self::add_token_index(collection_id, current_index, &owner).unwrap();23932394        <ItemListIndex>::insert(collection_id, current_index);23952396        // Update balance2397        let new_balance = <Balance<T>>::get(collection_id, &owner)2398            .checked_add(value)2399            .unwrap();2400        <Balance<T>>::insert(collection_id, owner.clone(), new_balance);2401    }24022403    fn add_token_index(collection_id: CollectionId, item_index: TokenId, owner: &T::AccountId) -> DispatchResult {24042405        // add to account limit2406        if <AccountItemCount<T>>::contains_key(owner) {24072408            // bound Owned tokens by a single address2409            let count = <AccountItemCount<T>>::get(owner);2410            ensure!(count < ChainLimit::get().account_token_ownership_limit, Error::<T>::AddressOwnershipLimitExceeded);24112412            <AccountItemCount<T>>::insert(owner.clone(), count2413                .checked_add(1)2414                .ok_or(Error::<T>::NumOverflow)?);2415        }2416        else {2417            <AccountItemCount<T>>::insert(owner.clone(), 1);2418        }24192420        let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner);2421        if list_exists {2422            let mut list = <AddressTokens<T>>::get(collection_id, owner);2423            let item_contains = list.contains(&item_index.clone());24242425            if !item_contains {2426                list.push(item_index.clone());2427            }24282429            <AddressTokens<T>>::insert(collection_id, owner.clone(), list);2430        } else {2431            let mut itm = Vec::new();2432            itm.push(item_index.clone());2433            <AddressTokens<T>>::insert(collection_id, owner.clone(), itm);2434        }24352436        Ok(())2437    }24382439    fn remove_token_index(2440        collection_id: CollectionId,2441        item_index: TokenId,2442        owner: &T::AccountId,2443    ) -> DispatchResult {24442445        // update counter2446        <AccountItemCount<T>>::insert(owner.clone(), 2447            <AccountItemCount<T>>::get(owner)2448            .checked_sub(1)2449            .ok_or(Error::<T>::NumOverflow)?);245024512452        let list_exists = <AddressTokens<T>>::contains_key(collection_id, owner);2453        if list_exists {2454            let mut list = <AddressTokens<T>>::get(collection_id, owner);2455            let item_contains = list.contains(&item_index.clone());24562457            if item_contains {2458                list.retain(|&item| item != item_index);2459                <AddressTokens<T>>::insert(collection_id, owner.clone(), list);2460            }2461        }24622463        Ok(())2464    }24652466    fn move_token_index(2467        collection_id: CollectionId,2468        item_index: TokenId,2469        old_owner: &T::AccountId,2470        new_owner: &T::AccountId,2471    ) -> DispatchResult {2472        Self::remove_token_index(collection_id, item_index, old_owner)?;2473        Self::add_token_index(collection_id, item_index, new_owner)?;24742475        Ok(())2476    }2477    2478    fn ensure_contract_owned(account: T::AccountId, contract: &T::AccountId) -> DispatchResult {2479        if <ContractOwner<T>>::contains_key(contract.clone()) {2480            let owner = <ContractOwner<T>>::get(contract);2481            ensure!(account == owner, Error::<T>::NoPermission);2482        } else {2483            fail!(Error::<T>::NoPermission);2484        }24852486        Ok(())2487    }2488}24892490////////////////////////////////////////////////////////////////////////////////////////////////////2491// Economic models2492// #region24932494/// Fee multiplier.2495pub type Multiplier = FixedU128;24962497type BalanceOf<T> = <<T as pallet_transaction_payment::Config>::OnChargeTransaction as pallet_transaction_payment::OnChargeTransaction<T>>::Balance;24982499/// Require the transactor pay for themselves and maybe include a tip to gain additional priority2500/// in the queue.2501#[derive(Encode, Decode, Clone, Eq, PartialEq)]2502pub struct ChargeTransactionPayment<T: Config>(#[codec(compact)] BalanceOf<T>);25032504impl<T: Config + Send + Sync> sp_std::fmt::Debug 2505    for ChargeTransactionPayment<T>2506{2507	#[cfg(feature = "std")]2508	fn fmt(&self, f: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {2509		write!(f, "ChargeTransactionPayment<{:?}>", self.0)2510	}2511	#[cfg(not(feature = "std"))]2512	fn fmt(&self, _: &mut sp_std::fmt::Formatter) -> sp_std::fmt::Result {2513		Ok(())2514	}2515}25162517impl<T: Config> ChargeTransactionPayment<T>2518where2519    T::Call: Dispatchable<Info=DispatchInfo, PostInfo=PostDispatchInfo> + IsSubType<Call<T>> + IsSubType<pallet_contracts::Call<T>>,2520    BalanceOf<T>: Send + Sync + From<u64> + FixedPointOperand,2521    T::AccountId: AsRef<[u8]>,2522    T::AccountId: UncheckedFrom<T::Hash>,2523{2524    fn traditional_fee(2525        len: usize,2526        info: &DispatchInfoOf<T::Call>,2527        tip: BalanceOf<T>,2528    ) -> BalanceOf<T>2529    where2530        T::Call: Dispatchable<Info = DispatchInfo>,2531    {2532        <pallet_transaction_payment::Module<T>>::compute_fee(len as u32, info, tip)2533    }25342535	fn get_priority(len: usize, info: &DispatchInfoOf<T::Call>, final_fee: BalanceOf<T>) -> TransactionPriority {2536        let weight_saturation = T::BlockWeights::get().max_block / info.weight.max(1);2537        let max_block_length = *T::BlockLength::get().max.get(DispatchClass::Normal);2538        let len_saturation = max_block_length as u64 / (len as u64).max(1);2539        let coefficient: BalanceOf<T> = weight_saturation2540            .min(len_saturation)2541            .saturated_into::<BalanceOf<T>>();2542        final_fee2543            .saturating_mul(coefficient)2544            .saturated_into::<TransactionPriority>()2545    }25462547    fn withdraw_fee(2548        &self,2549        who: &T::AccountId,2550        call: &T::Call,2551        info: &DispatchInfoOf<T::Call>,2552        len: usize,2553	) -> Result<2554		(2555			BalanceOf<T>,2556			<<T as pallet_transaction_payment::Config>::OnChargeTransaction as pallet_transaction_payment::OnChargeTransaction<T>>::LiquidityInfo,2557		),2558		TransactionValidityError,2559	> {2560        let tip = self.0;25612562        let fee = Self::traditional_fee(len, info, tip);25632564        // Only mess with balances if fee is not zero.2565        if fee.is_zero() {2566            return <<T as pallet_transaction_payment::Config>::OnChargeTransaction as pallet_transaction_payment::OnChargeTransaction<T>>::withdraw_fee(who, call, info, fee, tip)2567			.map(|i| (fee, i));2568        }25692570        // Determine who is paying transaction fee based on ecnomic model2571        // Parse call to extract collection ID and access collection sponsor2572        let mut sponsor: T::AccountId = match IsSubType::<Call<T>>::is_sub_type(call) {2573            Some(Call::create_item(collection_id, _owner, _properties)) => {25742575                // sponsor timeout2576                let block_number = <system::Module<T>>::block_number() as T::BlockNumber;25772578                let collection = <Collection<T>>::get(collection_id);25792580                let limit = collection.limits.sponsor_transfer_timeout;2581                let mut sponsored = true;2582                if <CreateItemBasket<T>>::contains_key((collection_id, &who)) {2583                    let last_tx_block = <CreateItemBasket<T>>::get((collection_id, &who));2584                    let limit_time = last_tx_block + limit.into();2585                    if block_number <= limit_time {2586                        sponsored = false;2587                    }2588                }2589                if sponsored {2590                    <CreateItemBasket<T>>::insert((collection_id, who.clone()), block_number);2591                }25922593                // check free create limit2594                if (collection.limits.sponsored_data_size >= (_properties.len() as u32)) &&2595                   (sponsored)2596                {2597                    collection.sponsorship.sponsor()2598                        .cloned()2599                        .unwrap_or_default()2600                } else {2601                    T::AccountId::default()2602                }2603            }2604            Some(Call::transfer(_new_owner, collection_id, item_id, _value)) => {2605                2606                let mut sponsor_transfer = false;2607                if <Collection<T>>::get(collection_id).sponsorship.confirmed() {26082609                    let collection_limits = <Collection<T>>::get(collection_id).limits;2610                    let collection_mode = <Collection<T>>::get(collection_id).mode;2611    2612                    // sponsor timeout2613                    let block_number = <system::Module<T>>::block_number() as T::BlockNumber;2614                    sponsor_transfer = match collection_mode {2615                        CollectionMode::NFT => {2616    2617                            // get correct limit2618                            let limit: u32 = if collection_limits.sponsor_transfer_timeout > 0 {2619                                collection_limits.sponsor_transfer_timeout2620                            } else {2621                                ChainLimit::get().nft_sponsor_transfer_timeout2622                            };2623    2624                            let mut sponsored = true;2625                            if <NftTransferBasket<T>>::contains_key(collection_id, item_id) {2626                                let last_tx_block = <NftTransferBasket<T>>::get(collection_id, item_id);2627                                let limit_time = last_tx_block + limit.into();2628                                if block_number <= limit_time {2629                                    sponsored = false;2630                                }2631                            }2632                            if sponsored {2633                                <NftTransferBasket<T>>::insert(collection_id, item_id, block_number);2634                            }26352636                            sponsored2637                        }2638                        CollectionMode::Fungible(_) => {2639    2640                            // get correct limit2641                            let limit: u32 = if collection_limits.sponsor_transfer_timeout > 0 {2642                                collection_limits.sponsor_transfer_timeout2643                            } else {2644                                ChainLimit::get().fungible_sponsor_transfer_timeout2645                            };2646    2647                            let block_number = <system::Module<T>>::block_number() as T::BlockNumber;2648                            let mut sponsored = true;2649                            if <FungibleTransferBasket<T>>::contains_key(collection_id, who) {2650                                let last_tx_block = <FungibleTransferBasket<T>>::get(collection_id, who);2651                                let limit_time = last_tx_block + limit.into();2652                                if block_number <= limit_time {2653                                    sponsored = false;2654                                }2655                            }2656                            if sponsored {2657                                <FungibleTransferBasket<T>>::insert(collection_id, who, block_number);2658                            }26592660                            sponsored2661                        }2662                        CollectionMode::ReFungible => {2663    2664                            // get correct limit2665                            let limit: u32 = if collection_limits.sponsor_transfer_timeout > 0 {2666                                collection_limits.sponsor_transfer_timeout2667                            } else {2668                                ChainLimit::get().refungible_sponsor_transfer_timeout2669                            };2670    2671                            let mut sponsored = true;2672                            if <ReFungibleTransferBasket<T>>::contains_key(collection_id, item_id) {2673                                let last_tx_block = <ReFungibleTransferBasket<T>>::get(collection_id, item_id);2674                                let limit_time = last_tx_block + limit.into();2675                                if block_number <= limit_time {2676                                    sponsored = false;2677                                }2678                            }2679                            if sponsored {2680                                <ReFungibleTransferBasket<T>>::insert(collection_id, item_id, block_number);2681                            }26822683                            sponsored2684                        }2685                        _ => {2686                            false2687                        },2688                    };2689                }26902691                if !sponsor_transfer {2692                    T::AccountId::default()2693                } else {2694                    <Collection<T>>::get(collection_id).sponsorship.sponsor()2695                        .cloned()2696                        .unwrap_or_default()2697                }2698            }26992700            _ => T::AccountId::default(),2701        };27022703        // Sponsor smart contracts2704        sponsor = match IsSubType::<pallet_contracts::Call<T>>::is_sub_type(call) {27052706            // On instantiation: set the contract owner2707            Some(pallet_contracts::Call::instantiate(_endowment, _gas_limit, code_hash, _data, salt)) => {27082709                let new_contract_address = <pallet_contracts::Module<T>>::contract_address(2710                    &who,2711                    code_hash,2712                    salt,2713                );2714                <ContractOwner<T>>::insert(new_contract_address.clone(), who.clone());27152716                T::AccountId::default()2717            },27182719            // On instantiation with code: set the contract owner2720            Some(pallet_contracts::Call::instantiate_with_code(_endowment, _gas_limit, _code, _data, _salt))  => {27212722                let new_contract_address = <pallet_contracts::Module<T>>::contract_address(2723                    &who,2724                    &T::Hashing::hash(&_code),2725                    _salt,2726                );27272728                <ContractOwner<T>>::insert(new_contract_address.clone(), who.clone());27292730                T::AccountId::default()2731            }27322733            // When the contract is called, check if the sponsoring is enabled and pay fees from contract endowment if it is2734            Some(pallet_contracts::Call::call(dest, _value, _gas_limit, _data)) => {27352736                let called_contract: T::AccountId = T::Lookup::lookup((*dest).clone()).unwrap_or(T::AccountId::default());27372738                let owned_contract = <ContractOwner<T>>::contains_key(called_contract.clone())2739                  && <ContractOwner<T>>::get(called_contract.clone()) == *who;2740                let white_list_enabled = <ContractWhiteListEnabled<T>>::contains_key(called_contract.clone()) && <ContractWhiteListEnabled<T>>::get(called_contract.clone());2741                  2742                if !owned_contract && white_list_enabled {2743                    if !<ContractWhiteList<T>>::contains_key(called_contract.clone(), who) {2744                        return Err(InvalidTransaction::Call.into());2745                    }2746                }27472748                let mut sponsor_transfer = false;2749                if <ContractSponsoringRateLimit<T>>::contains_key(called_contract.clone()) {2750                    let last_tx_block = <ContractSponsorBasket<T>>::get((&called_contract, &who));2751                    let block_number = <system::Module<T>>::block_number() as T::BlockNumber;2752                    let rate_limit = <ContractSponsoringRateLimit<T>>::get(&called_contract);2753                    let limit_time = last_tx_block + rate_limit;27542755                    if block_number >= limit_time {2756                        <ContractSponsorBasket<T>>::insert((called_contract.clone(), who.clone()), block_number);2757                        sponsor_transfer = true;2758                    }2759                } else {2760                    sponsor_transfer = false;2761                }2762               2763                2764                let mut sp = T::AccountId::default();2765                if sponsor_transfer {2766                    if <ContractSelfSponsoring<T>>::contains_key(called_contract.clone()) {2767                        if <ContractSelfSponsoring<T>>::get(called_contract.clone()) {2768                            sp = called_contract;2769                        }2770                    }2771                }27722773                sp2774            },27752776            _ => sponsor,2777        };27782779        let mut who_pays_fee: T::AccountId = sponsor.clone();2780        if sponsor == T::AccountId::default() {2781            who_pays_fee = who.clone();2782        }27832784		<<T as pallet_transaction_payment::Config>::OnChargeTransaction as pallet_transaction_payment::OnChargeTransaction<T>>::withdraw_fee(&who_pays_fee, call, info, fee, tip)2785			.map(|i| (fee, i))2786    }2787}278827892790impl<T: Config + Send + Sync> SignedExtension2791    for ChargeTransactionPayment<T>2792where2793    BalanceOf<T>: Send + Sync + From<u64> + FixedPointOperand,2794    T::Call: Dispatchable<Info = DispatchInfo, PostInfo = PostDispatchInfo> + IsSubType<Call<T>> + IsSubType<pallet_contracts::Call<T>>,2795    T::AccountId: AsRef<[u8]>,2796    T::AccountId: UncheckedFrom<T::Hash>,2797{2798    const IDENTIFIER: &'static str = "ChargeTransactionPayment";2799    type AccountId = T::AccountId;2800    type Call = T::Call;2801    type AdditionalSigned = ();2802    type Pre = (2803        // tip2804        BalanceOf<T>,2805        // who pays fee2806        Self::AccountId,2807		// imbalance resulting from withdrawing the fee2808		<<T as pallet_transaction_payment::Config>::OnChargeTransaction as pallet_transaction_payment::OnChargeTransaction<T>>::LiquidityInfo,2809    );2810    fn additional_signed(&self) -> sp_std::result::Result<(), TransactionValidityError> {2811        Ok(())2812    }28132814    fn validate(2815        &self,2816        who: &Self::AccountId,2817        call: &Self::Call,2818        info: &DispatchInfoOf<Self::Call>,2819        len: usize,2820    ) -> TransactionValidity {2821		let (fee, _) = self.withdraw_fee(who, call, info, len)?;2822		Ok(ValidTransaction {2823			priority: Self::get_priority(len, info, fee),2824			..Default::default()2825		})2826    }28272828    fn pre_dispatch(2829        self,2830        who: &Self::AccountId,2831        call: &Self::Call,2832        info: &DispatchInfoOf<Self::Call>,2833        len: usize,2834    ) -> Result<Self::Pre, TransactionValidityError> {2835        let (_fee, imbalance) = self.withdraw_fee(who, call, info, len)?;2836        Ok((self.0, who.clone(), imbalance))2837    }28382839    fn post_dispatch(2840        pre: Self::Pre,2841        info: &DispatchInfoOf<Self::Call>,2842        post_info: &PostDispatchInfoOf<Self::Call>,2843        len: usize,2844        _result: &DispatchResult,2845    ) -> Result<(), TransactionValidityError> {2846		let (tip, who, imbalance) = pre;2847		let actual_fee = pallet_transaction_payment::Module::<T>::compute_actual_fee(2848			len as u32,2849			info,2850			post_info,2851			tip,2852		);2853		<T as pallet_transaction_payment::Config>::OnChargeTransaction::correct_and_deposit_fee(&who, info, post_info, actual_fee, tip, imbalance)?;2854		Ok(())2855    }2856}28572858// #endregion
modifiedpallets/nft/src/tests.rsdiffbeforeafterboth
--- a/pallets/nft/src/tests.rs
+++ b/pallets/nft/src/tests.rs
@@ -55,11 +55,11 @@
     let saved_col_name: Vec<u16> = "Test1\0".encode_utf16().collect::<Vec<u16>>();
     let saved_description: Vec<u16> = "TestDescription1\0".encode_utf16().collect::<Vec<u16>>();
     let saved_prefix: Vec<u8> = b"token_prefix1\0".to_vec();
-    assert_eq!(TemplateModule::collection(id).owner, owner);
-    assert_eq!(TemplateModule::collection(id).name, saved_col_name);
-    assert_eq!(TemplateModule::collection(id).mode, *mode);
-    assert_eq!(TemplateModule::collection(id).description, saved_description);
-    assert_eq!(TemplateModule::collection(id).token_prefix, saved_prefix);
+    assert_eq!(TemplateModule::collection_id(id).unwrap().owner, owner);
+    assert_eq!(TemplateModule::collection_id(id).unwrap().name, saved_col_name);
+    assert_eq!(TemplateModule::collection_id(id).unwrap().mode, *mode);
+    assert_eq!(TemplateModule::collection_id(id).unwrap().description, saved_description);
+    assert_eq!(TemplateModule::collection_id(id).unwrap().token_prefix, saved_prefix);
     id
 }
 
@@ -89,7 +89,7 @@
         let collection_id = create_test_collection(&CollectionMode::NFT, 1);
         
         assert_ok!(TemplateModule::set_schema_version(origin1, collection_id, SchemaVersion::Unique));
-        assert_eq!(TemplateModule::collection(collection_id).schema_version, SchemaVersion::Unique);
+        assert_eq!(TemplateModule::collection_id(collection_id).unwrap().schema_version, SchemaVersion::Unique);
     });
 }
 
@@ -622,7 +622,7 @@
             collection_id,
             2
         ));
-        assert_eq!(TemplateModule::collection(collection_id).owner, 2);
+        assert_eq!(TemplateModule::collection_id(collection_id).unwrap().owner, 2);
     });
 }
 
@@ -1841,8 +1841,8 @@
         let origin1 = Origin::signed(1);
         assert_ok!(TemplateModule::set_const_on_chain_schema(origin1, collection_id, b"test const on chain schema".to_vec()));
 
-        assert_eq!(TemplateModule::collection(collection_id).const_on_chain_schema, b"test const on chain schema".to_vec());
-        assert_eq!(TemplateModule::collection(collection_id).variable_on_chain_schema, b"".to_vec());
+        assert_eq!(TemplateModule::collection_id(collection_id).unwrap().const_on_chain_schema, b"test const on chain schema".to_vec());
+        assert_eq!(TemplateModule::collection_id(collection_id).unwrap().variable_on_chain_schema, b"".to_vec());
     });
 }
 
@@ -1856,8 +1856,8 @@
         let origin1 = Origin::signed(1);
         assert_ok!(TemplateModule::set_variable_on_chain_schema(origin1, collection_id, b"test variable on chain schema".to_vec()));
 
-        assert_eq!(TemplateModule::collection(collection_id).const_on_chain_schema, b"".to_vec());
-        assert_eq!(TemplateModule::collection(collection_id).variable_on_chain_schema, b"test variable on chain schema".to_vec());
+        assert_eq!(TemplateModule::collection_id(collection_id).unwrap().const_on_chain_schema, b"".to_vec());
+        assert_eq!(TemplateModule::collection_id(collection_id).unwrap().variable_on_chain_schema, b"test variable on chain schema".to_vec());
     });
 }
 
modifiedruntime/src/chain_extension.rsdiffbeforeafterboth
--- a/runtime/src/chain_extension.rs
+++ b/runtime/src/chain_extension.rs
@@ -60,7 +60,9 @@
                 }
                 let recipient = AccountId32::from(bytes_rec);
 
-                match pallet_nft::Module::<Runtime>::transfer_internal(sender, recipient, input.collection_id, input.token_id, input.amount) {
+                let collection = pallet_nft::Module::<Runtime>::get_collection(input.collection_id)?;
+
+                match pallet_nft::Module::<Runtime>::transfer_internal(sender, recipient, &collection, input.token_id, input.amount) {
                     Ok(_) => Ok(RetVal::Converging(func_id)),
                     _ => Err(DispatchError::Other("Transfer error"))
                 }
modifiedruntime/src/nft_weights.rsdiffbeforeafterboth
--- a/runtime/src/nft_weights.rs
+++ b/runtime/src/nft_weights.rs
@@ -133,6 +133,11 @@
             .saturating_add(DbWeight::get().reads(0 as Weight))
             .saturating_add(DbWeight::get().writes(2 as Weight))
     }    
+    fn set_variable_meta_data_sponsoring_rate_limit() -> Weight {
+        (3_500_000 as Weight)
+            .saturating_add(DbWeight::get().reads(1 as Weight))
+            .saturating_add(DbWeight::get().writes(2 as Weight))
+    }
     fn toggle_contract_white_list() -> Weight {
         (3_000_000 as Weight)
             .saturating_add(DbWeight::get().reads(0 as Weight))
modifiedruntime_types.jsondiffbeforeafterboth
--- a/runtime_types.json
+++ b/runtime_types.json
@@ -38,7 +38,7 @@
         "Confirmed": "AccountId"
       }
     },
-    "CollectionType": {
+    "Collection": {
       "Owner": "AccountId",
       "Mode": "CollectionMode",
       "Access": "AccessMode",
@@ -99,7 +99,8 @@
     },
     "CollectionLimits": {
       "AccountTokenOwnershipLimit": "u32",
-      "SponsoredMintSize": "u32",
+      "SponsoredDataSize": "u32",
+      "SponsoredDataRateLimit": "Option<BlockNumber>",
       "TokenLimit": "u32",
       "SponsorTimeout": "u32",
       "OwnerCanTransfer": "bool",
modifiedtests/package.jsondiffbeforeafterboth
--- a/tests/package.json
+++ b/tests/package.json
@@ -46,7 +46,8 @@
     "testEnableContractSponsoring": "mocha --timeout 9999999 -r ts-node/register ./**/enableContractSponsoring.test.ts",
     "testSetContractSponsoringRateLimit": "mocha --timeout 9999999 -r ts-node/register ./**/setContractSponsoringRateLimit.test.ts",
     "testSetOffchainSchema": "mocha --timeout 9999999 -r ts-node/register ./**/setOffchainSchema.test.ts",
-    "testOverflow": "mocha --timeout 9999999 -r ts-node/register ./**/overflow.test.ts"
+    "testOverflow": "mocha --timeout 9999999 -r ts-node/register ./**/overflow.test.ts",
+    "testSetVariableMetadataSponsoringRateLimit": "mocha --timeout 9999999 -r ts-node/register ./**/setVariableMetadataSponsoringRateLimit.test.ts"
   },
   "author": "",
   "license": "SEE LICENSE IN ../LICENSE",
modifiedtests/src/addCollectionAdmin.test.tsdiffbeforeafterboth
--- a/tests/src/addCollectionAdmin.test.ts
+++ b/tests/src/addCollectionAdmin.test.ts
@@ -1,135 +1,135 @@
-//
-// This file is subject to the terms and conditions defined in
-// file 'LICENSE', which is part of this source code package.
-//
-
-import { ApiPromise } from '@polkadot/api';
-import BN from 'bn.js';
-import chai from 'chai';
-import chaiAsPromised from 'chai-as-promised';
-import privateKey from './substrate/privateKey';
-import { default as usingApi, submitTransactionAsync, submitTransactionExpectFailAsync } from './substrate/substrate-api';
-import {createCollectionExpectSuccess, destroyCollectionExpectSuccess} from './util/helpers';
-
-chai.use(chaiAsPromised);
-const expect = chai.expect;
-
-describe('Integration Test addCollectionAdmin(collection_id, new_admin_id):', () => {
-  it('Add collection admin.', async () => {
-    await usingApi(async (api) => {
-      const collectionId = await createCollectionExpectSuccess();
-      const alice = privateKey('//Alice');
-      const bob = privateKey('//Bob');
-
-      const collection: any = (await api.query.nft.collection(collectionId));
-      expect(collection.Owner.toString()).to.be.eq(alice.address);
-
-      const changeAdminTx = api.tx.nft.addCollectionAdmin(collectionId, bob.address);
-      await submitTransactionAsync(alice, changeAdminTx);
-
-      const adminListAfterAddAdmin: any = (await api.query.nft.adminList(collectionId));
-      expect(adminListAfterAddAdmin).to.be.contains(bob.address);
-    });
-  });
-
-  it('Add admin using added collection admin.', async () => {
-    await usingApi(async (api) => {
-      const collectionId = await createCollectionExpectSuccess();
-      const Alice = privateKey('//Alice');
-      const Bob = privateKey('//Bob');
-      const Charlie = privateKey('//CHARLIE');
-
-      const collection: any = (await api.query.nft.collection(collectionId));
-      expect(collection.Owner.toString()).to.be.eq(Alice.address);
-
-      const changeAdminTx = api.tx.nft.addCollectionAdmin(collectionId, Bob.address);
-      await submitTransactionAsync(Alice, changeAdminTx);
-
-      const adminListAfterAddAdmin: any = (await api.query.nft.adminList(collectionId));
-      expect(adminListAfterAddAdmin).to.be.contains(Bob.address);
-
-      const changeAdminTxCharlie = api.tx.nft.addCollectionAdmin(collectionId, Charlie.address);
-      await submitTransactionAsync(Bob, changeAdminTxCharlie);
-      const adminListAfterAddNewAdmin: any = (await api.query.nft.adminList(collectionId));
-      expect(adminListAfterAddNewAdmin).to.be.contains(Bob.address);
-      expect(adminListAfterAddNewAdmin).to.be.contains(Charlie.address);
-    });
-  });
-});
-
-describe('Negative Integration Test addCollectionAdmin(collection_id, new_admin_id):', () => {
-  it("Not owner can't add collection admin.", async () => {
-    await usingApi(async (api) => {
-      const collectionId = await createCollectionExpectSuccess();
-      const alice = privateKey('//Alice');
-      const nonOwner = privateKey('//Bob_stash');
-
-      const changeAdminTx = api.tx.nft.addCollectionAdmin(collectionId, alice.address);
-      await expect(submitTransactionExpectFailAsync(nonOwner, changeAdminTx)).to.be.rejected;
-
-      const adminListAfterAddAdmin: any = (await api.query.nft.adminList(collectionId));
-      expect(adminListAfterAddAdmin).not.to.be.contains(alice.address);
-
-      // Verifying that nothing bad happened (network is live, new collections can be created, etc.)
-      await createCollectionExpectSuccess();
-    });
-  });
-  it("Can't add collection admin of not existing collection.", async () => {
-    await usingApi(async (api) => {
-      // tslint:disable-next-line: no-bitwise
-      const collectionId = (1 << 32) - 1;
-      const alice = privateKey('//Alice');
-      const bob = privateKey('//Bob');
-
-      const changeOwnerTx = api.tx.nft.addCollectionAdmin(collectionId, bob.address);
-      await expect(submitTransactionExpectFailAsync(alice, changeOwnerTx)).to.be.rejected;
-
-      // Verifying that nothing bad happened (network is live, new collections can be created, etc.)
-      await createCollectionExpectSuccess();
-    });
-  });
-
-  it("Can't add an admin to a destroyed collection.", async () => {
-    await usingApi(async (api) => {
-      const collectionId = await createCollectionExpectSuccess();
-      const Alice = privateKey('//Alice');
-      const Bob = privateKey('//Bob');
-      await destroyCollectionExpectSuccess(collectionId);
-      const changeOwnerTx = api.tx.nft.addCollectionAdmin(collectionId, Bob.address);
-      await expect(submitTransactionExpectFailAsync(Alice, changeOwnerTx)).to.be.rejected;
-
-      // Verifying that nothing bad happened (network is live, new collections can be created, etc.)
-      await createCollectionExpectSuccess();
-    });
-  });
-
-  it('Add an admin to a collection that has reached the maximum number of admins limit', async () => {
-    await usingApi(async (api: ApiPromise) => {
-      const Alice = privateKey('//Alice');
-      const accounts = [
-        'GsvVmjr1CBHwQHw84pPHMDxgNY3iBLz6Qn7qS3CH8qPhrHz',
-        'FoQJpPyadYccjavVdTWxpxU7rUEaYhfLCPwXgkfD6Zat9QP',
-        'JKspFU6ohf1Grg3Phdzj2pSgWvsYWzSfKghhfzMbdhNBWs5',
-        'Fr4NzY1udSFFLzb2R3qxVQkwz9cZraWkyfH4h3mVVk7BK7P',
-        'DfnTB4z7eUvYRqcGtTpFsLC69o6tvBSC1pEv8vWPZFtCkaK',
-        'HnMAUz7r2G8G3hB27SYNyit5aJmh2a5P4eMdDtACtMFDbam',
-        'DE14BzQ1bDXWPKeLoAqdLAm1GpyAWaWF1knF74cEZeomTBM',
-      ];
-      const collectionId = await createCollectionExpectSuccess();
-
-      const chainLimit = await api.query.nft.chainLimit() as unknown as { CollectionAdminsLimit: BN };
-      const chainAdminLimit = chainLimit.CollectionAdminsLimit.toNumber();
-      expect(chainAdminLimit).to.be.equal(5);
-
-      for (let i = 0; i < chainAdminLimit; i++) {
-        const changeAdminTx = api.tx.nft.addCollectionAdmin(collectionId, accounts[i]);
-        await submitTransactionAsync(Alice, changeAdminTx);
-        const adminListAfterAddAdmin: any = (await api.query.nft.adminList(collectionId));
-        expect(adminListAfterAddAdmin).to.be.contains(accounts[i]);
-      }
-
-      const tx = api.tx.nft.addCollectionAdmin(collectionId, accounts[chainAdminLimit]);
-      await expect(submitTransactionExpectFailAsync(Alice, tx)).to.be.rejected;
-    });
-  });
-});
+//
+// This file is subject to the terms and conditions defined in
+// file 'LICENSE', which is part of this source code package.
+//
+
+import { ApiPromise } from '@polkadot/api';
+import BN from 'bn.js';
+import chai from 'chai';
+import chaiAsPromised from 'chai-as-promised';
+import privateKey from './substrate/privateKey';
+import { default as usingApi, submitTransactionAsync, submitTransactionExpectFailAsync } from './substrate/substrate-api';
+import {createCollectionExpectSuccess, destroyCollectionExpectSuccess} from './util/helpers';
+
+chai.use(chaiAsPromised);
+const expect = chai.expect;
+
+describe('Integration Test addCollectionAdmin(collection_id, new_admin_id):', () => {
+  it('Add collection admin.', async () => {
+    await usingApi(async (api) => {
+      const collectionId = await createCollectionExpectSuccess();
+      const alice = privateKey('//Alice');
+      const bob = privateKey('//Bob');
+
+      const collection: any = (await api.query.nft.collectionById(collectionId)).toJSON();
+      expect(collection.Owner.toString()).to.be.eq(alice.address);
+
+      const changeAdminTx = api.tx.nft.addCollectionAdmin(collectionId, bob.address);
+      await submitTransactionAsync(alice, changeAdminTx);
+
+      const adminListAfterAddAdmin: any = (await api.query.nft.adminList(collectionId));
+      expect(adminListAfterAddAdmin).to.be.contains(bob.address);
+    });
+  });
+
+  it('Add admin using added collection admin.', async () => {
+    await usingApi(async (api) => {
+      const collectionId = await createCollectionExpectSuccess();
+      const Alice = privateKey('//Alice');
+      const Bob = privateKey('//Bob');
+      const Charlie = privateKey('//CHARLIE');
+
+      const collection: any = (await api.query.nft.collectionById(collectionId)).toJSON();
+      expect(collection.Owner.toString()).to.be.eq(Alice.address);
+
+      const changeAdminTx = api.tx.nft.addCollectionAdmin(collectionId, Bob.address);
+      await submitTransactionAsync(Alice, changeAdminTx);
+
+      const adminListAfterAddAdmin: any = (await api.query.nft.adminList(collectionId));
+      expect(adminListAfterAddAdmin).to.be.contains(Bob.address);
+
+      const changeAdminTxCharlie = api.tx.nft.addCollectionAdmin(collectionId, Charlie.address);
+      await submitTransactionAsync(Bob, changeAdminTxCharlie);
+      const adminListAfterAddNewAdmin: any = (await api.query.nft.adminList(collectionId));
+      expect(adminListAfterAddNewAdmin).to.be.contains(Bob.address);
+      expect(adminListAfterAddNewAdmin).to.be.contains(Charlie.address);
+    });
+  });
+});
+
+describe('Negative Integration Test addCollectionAdmin(collection_id, new_admin_id):', () => {
+  it("Not owner can't add collection admin.", async () => {
+    await usingApi(async (api) => {
+      const collectionId = await createCollectionExpectSuccess();
+      const alice = privateKey('//Alice');
+      const nonOwner = privateKey('//Bob_stash');
+
+      const changeAdminTx = api.tx.nft.addCollectionAdmin(collectionId, alice.address);
+      await expect(submitTransactionExpectFailAsync(nonOwner, changeAdminTx)).to.be.rejected;
+
+      const adminListAfterAddAdmin: any = (await api.query.nft.adminList(collectionId));
+      expect(adminListAfterAddAdmin).not.to.be.contains(alice.address);
+
+      // Verifying that nothing bad happened (network is live, new collections can be created, etc.)
+      await createCollectionExpectSuccess();
+    });
+  });
+  it("Can't add collection admin of not existing collection.", async () => {
+    await usingApi(async (api) => {
+      // tslint:disable-next-line: no-bitwise
+      const collectionId = (1 << 32) - 1;
+      const alice = privateKey('//Alice');
+      const bob = privateKey('//Bob');
+
+      const changeOwnerTx = api.tx.nft.addCollectionAdmin(collectionId, bob.address);
+      await expect(submitTransactionExpectFailAsync(alice, changeOwnerTx)).to.be.rejected;
+
+      // Verifying that nothing bad happened (network is live, new collections can be created, etc.)
+      await createCollectionExpectSuccess();
+    });
+  });
+
+  it("Can't add an admin to a destroyed collection.", async () => {
+    await usingApi(async (api) => {
+      const collectionId = await createCollectionExpectSuccess();
+      const Alice = privateKey('//Alice');
+      const Bob = privateKey('//Bob');
+      await destroyCollectionExpectSuccess(collectionId);
+      const changeOwnerTx = api.tx.nft.addCollectionAdmin(collectionId, Bob.address);
+      await expect(submitTransactionExpectFailAsync(Alice, changeOwnerTx)).to.be.rejected;
+
+      // Verifying that nothing bad happened (network is live, new collections can be created, etc.)
+      await createCollectionExpectSuccess();
+    });
+  });
+
+  it('Add an admin to a collection that has reached the maximum number of admins limit', async () => {
+    await usingApi(async (api: ApiPromise) => {
+      const Alice = privateKey('//Alice');
+      const accounts = [
+        'GsvVmjr1CBHwQHw84pPHMDxgNY3iBLz6Qn7qS3CH8qPhrHz',
+        'FoQJpPyadYccjavVdTWxpxU7rUEaYhfLCPwXgkfD6Zat9QP',
+        'JKspFU6ohf1Grg3Phdzj2pSgWvsYWzSfKghhfzMbdhNBWs5',
+        'Fr4NzY1udSFFLzb2R3qxVQkwz9cZraWkyfH4h3mVVk7BK7P',
+        'DfnTB4z7eUvYRqcGtTpFsLC69o6tvBSC1pEv8vWPZFtCkaK',
+        'HnMAUz7r2G8G3hB27SYNyit5aJmh2a5P4eMdDtACtMFDbam',
+        'DE14BzQ1bDXWPKeLoAqdLAm1GpyAWaWF1knF74cEZeomTBM',
+      ];
+      const collectionId = await createCollectionExpectSuccess();
+
+      const chainLimit = await api.query.nft.chainLimit() as unknown as { CollectionAdminsLimit: BN };
+      const chainAdminLimit = chainLimit.CollectionAdminsLimit.toNumber();
+      expect(chainAdminLimit).to.be.equal(5);
+
+      for (let i = 0; i < chainAdminLimit; i++) {
+        const changeAdminTx = api.tx.nft.addCollectionAdmin(collectionId, accounts[i]);
+        await submitTransactionAsync(Alice, changeAdminTx);
+        const adminListAfterAddAdmin: any = (await api.query.nft.adminList(collectionId));
+        expect(adminListAfterAddAdmin).to.be.contains(accounts[i]);
+      }
+
+      const tx = api.tx.nft.addCollectionAdmin(collectionId, accounts[chainAdminLimit]);
+      await expect(submitTransactionExpectFailAsync(Alice, tx)).to.be.rejected;
+    });
+  });
+});
modifiedtests/src/change-collection-owner.test.tsdiffbeforeafterboth
--- a/tests/src/change-collection-owner.test.ts
+++ b/tests/src/change-collection-owner.test.ts
@@ -19,13 +19,13 @@
       const alice = privateKey('//Alice');
       const bob = privateKey('//Bob');
 
-      const collection: any = (await api.query.nft.collection(collectionId));
+      const collection: any = (await api.query.nft.collectionById(collectionId)).toJSON();
       expect(collection.Owner.toString()).to.be.eq(alice.address);
 
       const changeOwnerTx = api.tx.nft.changeCollectionOwner(collectionId, bob.address);
       await submitTransactionAsync(alice, changeOwnerTx);
 
-      const collectionAfterOwnerChange: any = (await api.query.nft.collection(collectionId));
+      const collectionAfterOwnerChange: any = (await api.query.nft.collectionById(collectionId)).toJSON();
       expect(collectionAfterOwnerChange.Owner.toString()).to.be.eq(bob.address);
     });
   });
@@ -41,7 +41,7 @@
       const changeOwnerTx = api.tx.nft.changeCollectionOwner(collectionId, bob.address);
       await expect(submitTransactionExpectFailAsync(bob, changeOwnerTx)).to.be.rejected;
 
-      const collectionAfterOwnerChange: any = (await api.query.nft.collection(collectionId));
+      const collectionAfterOwnerChange: any = (await api.query.nft.collectionById(collectionId)).toJSON();
       expect(collectionAfterOwnerChange.Owner.toString()).to.be.eq(alice.address);
 
       // Verifying that nothing bad happened (network is live, new collections can be created, etc.)
modifiedtests/src/removeCollectionAdmin.test.tsdiffbeforeafterboth
--- a/tests/src/removeCollectionAdmin.test.ts
+++ b/tests/src/removeCollectionAdmin.test.ts
@@ -19,7 +19,7 @@
       const collectionId = await createCollectionExpectSuccess();
       const Alice = privateKey('//Alice');
       const Bob = privateKey('//Bob');
-      const collection: any = (await api.query.nft.collection(collectionId));
+      const collection: any = (await api.query.nft.collectionById(collectionId)).toJSON();
       expect(collection.Owner.toString()).to.be.eq(Alice.address);
       // first - add collection admin Bob
       const addAdminTx = api.tx.nft.addCollectionAdmin(collectionId, Bob.address);
modifiedtests/src/setCollectionLimits.test.tsdiffbeforeafterboth
--- a/tests/src/setCollectionLimits.test.ts
+++ b/tests/src/setCollectionLimits.test.ts
@@ -61,12 +61,12 @@
 
       // tslint:disable-next-line:no-unused-expression
       expect(result.success).to.be.true;
-      expect(collectionInfo.Limits.AccountTokenOwnershipLimit.toNumber()).to.be.equal(accountTokenOwnershipLimit);
-      expect(collectionInfo.Limits.SponsoredMintSize.toNumber()).to.be.equal(sponsoredDataSize);
-      expect(collectionInfo.Limits.TokenLimit.toNumber()).to.be.equal(tokenLimit);
-      expect(collectionInfo.Limits.SponsorTimeout.toNumber()).to.be.equal(sponsorTimeout);
-      expect(collectionInfo.Limits.OwnerCanTransfer.valueOf()).to.be.true;
-      expect(collectionInfo.Limits.OwnerCanDestroy.valueOf()).to.be.true;
+      expect(collectionInfo.Limits.AccountTokenOwnershipLimit).to.be.equal(accountTokenOwnershipLimit);
+      expect(collectionInfo.Limits.SponsoredDataSize).to.be.equal(sponsoredDataSize);
+      expect(collectionInfo.Limits.TokenLimit).to.be.equal(tokenLimit);
+      expect(collectionInfo.Limits.SponsorTimeout).to.be.equal(sponsorTimeout);
+      expect(collectionInfo.Limits.OwnerCanTransfer).to.be.true;
+      expect(collectionInfo.Limits.OwnerCanDestroy).to.be.true;
     });
   });
 });
modifiedtests/src/setConstOnChainSchema.test.tsdiffbeforeafterboth
--- a/tests/src/setConstOnChainSchema.test.ts
+++ b/tests/src/setConstOnChainSchema.test.ts
@@ -36,7 +36,7 @@
   it('Run extrinsic with parameters of the collection id, set the scheme', async () => {
       await usingApi(async (api) => {
       const collectionId = await createCollectionExpectSuccess();
-      const collection: any = (await api.query.nft.collection(collectionId));
+      const collection: any = (await api.query.nft.collectionById(collectionId)).toJSON();
       expect(collection.Owner.toString()).to.be.eq(Alice.address);
       const setShema = api.tx.nft.setConstOnChainSchema(collectionId, Shema);
       await submitTransactionAsync(Alice, setShema);
@@ -48,7 +48,7 @@
         const collectionId = await createCollectionExpectSuccess();
         const setShema = api.tx.nft.setConstOnChainSchema(collectionId, Shema);
         await submitTransactionAsync(Alice, setShema);
-        const collection: any = (await api.query.nft.collection(collectionId));
+        const collection: any = (await api.query.nft.collectionById(collectionId)).toJSON();
         expect(collection.ConstOnChainSchema.toString()).to.be.eq(Shema);
 
     });
@@ -86,7 +86,7 @@
   it('Execute method not on behalf of the collection owner', async () => {
     await usingApi(async (api) => {
       const collectionId = await createCollectionExpectSuccess();
-      const collection: any = (await api.query.nft.collection(collectionId));
+      const collection: any = (await api.query.nft.collectionById(collectionId)).toJSON();
       expect(collection.Owner.toString()).to.be.eq(Alice.address);
       const setShema = api.tx.nft.setConstOnChainSchema(collectionId, Shema);
       await expect(submitTransactionExpectFailAsync(Bob, setShema)).to.be.rejected;
modifiedtests/src/setOffchainSchema.test.tsdiffbeforeafterboth
--- a/tests/src/setOffchainSchema.test.ts
+++ b/tests/src/setOffchainSchema.test.ts
@@ -36,7 +36,7 @@
     await setOffchainSchemaExpectSuccess(alice, collectionId, DATA);
     const collection = await queryCollectionExpectSuccess(collectionId);
 
-    expect(Array.from(collection.OffchainSchema)).to.be.deep.equal(DATA);
+    expect(collection.OffchainSchema).to.be.equal('0x' + Buffer.from(DATA).toString('hex'));
   });
 });
 
addedtests/src/setVariableMetadataSponsoringRateLimit.test.tsdiffbeforeafterboth
--- /dev/null
+++ b/tests/src/setVariableMetadataSponsoringRateLimit.test.ts
@@ -0,0 +1,80 @@
+//
+// This file is subject to the terms and conditions defined in
+// file 'LICENSE', which is part of this source code package.
+//
+
+import { IKeyringPair } from '@polkadot/types/types';
+import privateKey from './substrate/privateKey';
+import usingApi from './substrate/substrate-api';
+import {
+  confirmSponsorshipExpectSuccess,
+  createCollectionExpectSuccess,
+  createItemExpectSuccess,
+  findUnusedAddress,
+  setCollectionLimitsExpectSuccess,
+  setCollectionSponsorExpectSuccess,
+  setVariableMetaDataExpectFailure,
+  setVariableMetaDataExpectSuccess,
+} from './util/helpers';
+
+describe('Integration Test setVariableMetadataSponsoringRateLimit', () => {
+  let alice: IKeyringPair;
+  let userWithNoBalance: IKeyringPair;
+
+  before(async () => {
+    await usingApi(async (api) => {
+      alice = privateKey('//Alice');
+      userWithNoBalance = await findUnusedAddress(api);
+    });
+  });
+
+  it('sponsored setVariableMetaData can be called twice with pause for free', async () => {
+    const collectionId = await createCollectionExpectSuccess();
+    await setCollectionSponsorExpectSuccess(collectionId, alice.address);
+    await confirmSponsorshipExpectSuccess(collectionId);
+    await setCollectionLimitsExpectSuccess(alice, collectionId, {
+      SponsoredDataRateLimit: 0,
+    });
+
+    const itemId = await createItemExpectSuccess(alice, collectionId, 'NFT', userWithNoBalance.address);
+    await setVariableMetaDataExpectSuccess(userWithNoBalance, collectionId, itemId, [1, 2, 3]);
+    await setVariableMetaDataExpectSuccess(userWithNoBalance, collectionId, itemId, [1, 2, 3]);
+  });
+
+  it('sponsored setVariableMetaData can\'t be called twice without pause for free', async () => {
+    const collectionId = await createCollectionExpectSuccess();
+    await setCollectionSponsorExpectSuccess(collectionId, alice.address);
+    await confirmSponsorshipExpectSuccess(collectionId);
+    await setCollectionLimitsExpectSuccess(alice, collectionId, {
+      SponsoredDataRateLimit: 10,
+    });
+
+    const itemId = await createItemExpectSuccess(alice, collectionId, 'NFT', userWithNoBalance.address);
+    await setVariableMetaDataExpectSuccess(userWithNoBalance, collectionId, itemId, [1, 2, 3]);
+    await setVariableMetaDataExpectFailure(userWithNoBalance, collectionId, itemId, [1, 2, 3]);
+  });
+
+  it('sponsored setVariableMetaData can\'t be called for free with variable metadata above collection limits', async () => {
+    const collectionId = await createCollectionExpectSuccess();
+    await setCollectionSponsorExpectSuccess(collectionId, alice.address);
+    await confirmSponsorshipExpectSuccess(collectionId);
+    await setCollectionLimitsExpectSuccess(alice, collectionId, {
+      SponsoredDataRateLimit: 0,
+      SponsoredDataSize: 1,
+    });
+    const itemId = await createItemExpectSuccess(alice, collectionId, 'NFT', userWithNoBalance.address);
+
+    await setVariableMetaDataExpectSuccess(userWithNoBalance, collectionId, itemId, [1]);
+    await setVariableMetaDataExpectFailure(userWithNoBalance, collectionId, itemId, [1, 2]);
+  });
+
+  it.only('Default value of rate limit does not sponsor setting variable metadata', async () => {
+    const collectionId = await createCollectionExpectSuccess();
+    await setCollectionSponsorExpectSuccess(collectionId, alice.address);
+    await confirmSponsorshipExpectSuccess(collectionId);
+
+    const itemId = await createItemExpectSuccess(alice, collectionId, 'NFT', userWithNoBalance.address);
+    await setVariableMetaDataExpectFailure(userWithNoBalance, collectionId, itemId, [1]);
+  });
+
+});
modifiedtests/src/setVariableOnChainSchema.test.tsdiffbeforeafterboth
--- a/tests/src/setVariableOnChainSchema.test.ts
+++ b/tests/src/setVariableOnChainSchema.test.ts
@@ -1,96 +1,96 @@
-//
-// This file is subject to the terms and conditions defined in
-// file 'LICENSE', which is part of this source code package.
-//
-
-import { Keyring } from '@polkadot/api';
-import { IKeyringPair } from '@polkadot/types/types';
-import chai from 'chai';
-import chaiAsPromised from 'chai-as-promised';
-import { default as usingApi, submitTransactionAsync, submitTransactionExpectFailAsync } from './substrate/substrate-api';
-import {
-  createCollectionExpectSuccess,
-  destroyCollectionExpectSuccess,
-} from './util/helpers';
-
-chai.use(chaiAsPromised);
-const expect = chai.expect;
-
-let Alice: IKeyringPair;
-let Bob: IKeyringPair;
-let Schema: any;
-let largeSchema: any;
-
-before(async () => {
-  await usingApi(async (api) => {
-    const keyring = new Keyring({ type: 'sr25519' });
-    Alice = keyring.addFromUri('//Alice');
-    Bob = keyring.addFromUri('//Bob');
-    Schema = '0x31';
-    largeSchema = new Array(4097).fill(0xff);
-
-  });
-});
-describe('Integration Test ext. setVariableOnChainSchema()', () => {
-
-  it('Run extrinsic with parameters of the collection id, set the scheme', async () => {
-      await usingApi(async (api) => {
-      const collectionId = await createCollectionExpectSuccess();
-      const collection: any = (await api.query.nft.collection(collectionId));
-      expect(collection.Owner.toString()).to.be.eq(Alice.address);
-      const setSchema = api.tx.nft.setVariableOnChainSchema(collectionId, Schema);
-      await submitTransactionAsync(Alice, setSchema);
-    });
-  });
-
-  it('Checking collection data using the setVariableOnChainSchema parameter', async () => {
-      await usingApi(async (api) => {
-        const collectionId = await createCollectionExpectSuccess();
-        const setSchema = api.tx.nft.setVariableOnChainSchema(collectionId, Schema);
-        await submitTransactionAsync(Alice, setSchema);
-        const collection: any = (await api.query.nft.collection(collectionId));
-        expect(collection.VariableOnChainSchema.toString()).to.be.eq(Schema);
-
-    });
-  });
-});
-
-describe('Negative Integration Test ext. setVariableOnChainSchema()', () => {
-
-  it('Set a non-existent collection', async () => {
-    await usingApi(async (api) => {
-      // tslint:disable-next-line: radix
-      const collectionId = parseInt((await api.query.nft.createdCollectionCount()).toString()) + 1;
-      const setSchema = api.tx.nft.setVariableOnChainSchema(collectionId, Schema);
-      await expect(submitTransactionExpectFailAsync(Alice, setSchema)).to.be.rejected;
-    });
-  });
-
-  it('Set a previously deleted collection', async () => {
-    await usingApi(async (api) => {
-      const collectionId = await createCollectionExpectSuccess();
-      await destroyCollectionExpectSuccess(collectionId);
-      const setSchema = api.tx.nft.setVariableOnChainSchema(collectionId, Schema);
-      await expect(submitTransactionExpectFailAsync(Alice, setSchema)).to.be.rejected;
-    });
-  });
-
-  it('Set invalid data in schema (size too large:> 1024b)', async () => {
-    await usingApi(async (api) => {
-      const collectionId = await createCollectionExpectSuccess();
-      const setSchema = api.tx.nft.setVariableOnChainSchema(collectionId, largeSchema);
-      await expect(submitTransactionExpectFailAsync(Alice, setSchema)).to.be.rejected;
-    });
-  });
-
-  it('Execute method not on behalf of the collection owner', async () => {
-    await usingApi(async (api) => {
-      const collectionId = await createCollectionExpectSuccess();
-      const collection: any = (await api.query.nft.collection(collectionId));
-      expect(collection.Owner.toString()).to.be.eq(Alice.address);
-      const setSchema = api.tx.nft.setVariableOnChainSchema(collectionId, Schema);
-      await expect(submitTransactionExpectFailAsync(Bob, setSchema)).to.be.rejected;
-    });
-  });
-
-});
+//
+// This file is subject to the terms and conditions defined in
+// file 'LICENSE', which is part of this source code package.
+//
+
+import { Keyring } from '@polkadot/api';
+import { IKeyringPair } from '@polkadot/types/types';
+import chai from 'chai';
+import chaiAsPromised from 'chai-as-promised';
+import { default as usingApi, submitTransactionAsync, submitTransactionExpectFailAsync } from './substrate/substrate-api';
+import {
+  createCollectionExpectSuccess,
+  destroyCollectionExpectSuccess,
+} from './util/helpers';
+
+chai.use(chaiAsPromised);
+const expect = chai.expect;
+
+let Alice: IKeyringPair;
+let Bob: IKeyringPair;
+let Schema: any;
+let largeSchema: any;
+
+before(async () => {
+  await usingApi(async (api) => {
+    const keyring = new Keyring({ type: 'sr25519' });
+    Alice = keyring.addFromUri('//Alice');
+    Bob = keyring.addFromUri('//Bob');
+    Schema = '0x31';
+    largeSchema = new Array(4097).fill(0xff);
+
+  });
+});
+describe('Integration Test ext. setVariableOnChainSchema()', () => {
+
+  it('Run extrinsic with parameters of the collection id, set the scheme', async () => {
+      await usingApi(async (api) => {
+      const collectionId = await createCollectionExpectSuccess();
+      const collection: any = (await api.query.nft.collectionById(collectionId)).toJSON();
+      expect(collection.Owner.toString()).to.be.eq(Alice.address);
+      const setSchema = api.tx.nft.setVariableOnChainSchema(collectionId, Schema);
+      await submitTransactionAsync(Alice, setSchema);
+    });
+  });
+
+  it('Checking collection data using the setVariableOnChainSchema parameter', async () => {
+      await usingApi(async (api) => {
+        const collectionId = await createCollectionExpectSuccess();
+        const setSchema = api.tx.nft.setVariableOnChainSchema(collectionId, Schema);
+        await submitTransactionAsync(Alice, setSchema);
+        const collection: any = (await api.query.nft.collectionById(collectionId)).toJSON();
+        expect(collection.VariableOnChainSchema.toString()).to.be.eq(Schema);
+
+    });
+  });
+});
+
+describe('Negative Integration Test ext. setVariableOnChainSchema()', () => {
+
+  it('Set a non-existent collection', async () => {
+    await usingApi(async (api) => {
+      // tslint:disable-next-line: radix
+      const collectionId = parseInt((await api.query.nft.createdCollectionCount()).toString()) + 1;
+      const setSchema = api.tx.nft.setVariableOnChainSchema(collectionId, Schema);
+      await expect(submitTransactionExpectFailAsync(Alice, setSchema)).to.be.rejected;
+    });
+  });
+
+  it('Set a previously deleted collection', async () => {
+    await usingApi(async (api) => {
+      const collectionId = await createCollectionExpectSuccess();
+      await destroyCollectionExpectSuccess(collectionId);
+      const setSchema = api.tx.nft.setVariableOnChainSchema(collectionId, Schema);
+      await expect(submitTransactionExpectFailAsync(Alice, setSchema)).to.be.rejected;
+    });
+  });
+
+  it('Set invalid data in schema (size too large:> 1024b)', async () => {
+    await usingApi(async (api) => {
+      const collectionId = await createCollectionExpectSuccess();
+      const setSchema = api.tx.nft.setVariableOnChainSchema(collectionId, largeSchema);
+      await expect(submitTransactionExpectFailAsync(Alice, setSchema)).to.be.rejected;
+    });
+  });
+
+  it('Execute method not on behalf of the collection owner', async () => {
+    await usingApi(async (api) => {
+      const collectionId = await createCollectionExpectSuccess();
+      const collection: any = (await api.query.nft.collectionById(collectionId)).toJSON();
+      expect(collection.Owner.toString()).to.be.eq(Alice.address);
+      const setSchema = api.tx.nft.setVariableOnChainSchema(collectionId, Schema);
+      await expect(submitTransactionExpectFailAsync(Bob, setSchema)).to.be.rejected;
+    });
+  });
+
+});
modifiedtests/src/types.tsdiffbeforeafterboth
--- a/tests/src/types.ts
+++ b/tests/src/types.ts
@@ -13,10 +13,11 @@
   Description: [BN, BN]; // utf16
   isReFungible: boolean;
   Limits: {
-    AccountTokenOwnershipLimit: BN;
-    SponsoredMintSize: BN;
-    TokenLimit: BN;
-    SponsorTimeout: BN;
+    AccountTokenOwnershipLimit: number;
+    SponsoredDataSize: number;
+    SponsoredDataRateLimit?: number,
+    TokenLimit: number;
+    SponsorTimeout: number;
     OwnerCanTransfer: boolean;
     OwnerCanDestroy: boolean;
   };
modifiedtests/src/util/contracthelpers.tsdiffbeforeafterboth
--- a/tests/src/util/contracthelpers.ts
+++ b/tests/src/util/contracthelpers.ts
@@ -22,9 +22,9 @@
 
 function deployContract(alice: IKeyringPair, code: CodePromise, constructor: string = 'default', ...args: any[]): Promise<Contract> {
   return new Promise<Contract>(async (resolve, reject) => {
-    const unsub = await code
+    const unsub = await (code as any)
       .tx[constructor]({value: endowment, gasLimit}, ...args)
-      .signAndSend(alice, (result) => {
+      .signAndSend(alice, (result: any) => {
         if (result.status.isInBlock || result.status.isFinalized) {
           // here we have an additional field in the result, containing the blueprint
           resolve((result as any).contract);
modifiedtests/src/util/helpers.tsdiffbeforeafterboth
--- a/tests/src/util/helpers.ts
+++ b/tests/src/util/helpers.ts
@@ -212,7 +212,7 @@
     const BcollectionCount = parseInt((await api.query.nft.createdCollectionCount()).toString(), 10);
 
     // Get the collection
-    const collection: any = (await api.query.nft.collection(result.collectionId)).toJSON();
+    const collection: any = (await api.query.nft.collectionById(result.collectionId)).toJSON();
 
     // What to expect
     // tslint:disable-next-line:no-unused-expression
@@ -324,18 +324,17 @@
     const result = getDestroyResult(events);
 
     // Get the collection
-    const collection: any = (await api.query.nft.collection(collectionId)).toJSON();
+    const collection: any = (await api.query.nft.collectionById(collectionId)).toJSON();
 
     // What to expect
     expect(result).to.be.true;
-    expect(collection).to.be.not.null;
-    expect(collection.Owner).to.be.equal(nullPublicKey);
+    expect(collection).to.be.null;
   });
 }
 
 export async function queryCollectionLimits(collectionId: number) {
   return await usingApi(async (api) => {
-    return ((await api.query.nft.collection(collectionId)).toJSON() as any).Limits;
+    return ((await api.query.nft.collectionById(collectionId)).toJSON() as any).Limits;
   });
 }
 
@@ -373,7 +372,7 @@
     const result = getGenericResult(events);
 
     // Get the collection
-    const collection: any = (await api.query.nft.collection(collectionId)).toJSON();
+    const collection: any = (await api.query.nft.collectionById(collectionId)).toJSON();
 
     // What to expect
     expect(result.success).to.be.true;
@@ -393,7 +392,7 @@
     const result = getGenericResult(events);
 
     // Get the collection
-    const collection: any = (await api.query.nft.collection(collectionId)).toJSON();
+    const collection: any = (await api.query.nft.collectionById(collectionId)).toJSON();
 
     // What to expect
     expect(result.success).to.be.true;
@@ -431,7 +430,7 @@
     const result = getGenericResult(events);
 
     // Get the collection
-    const collection: any = (await api.query.nft.collection(collectionId)).toJSON();
+    const collection: any = (await api.query.nft.collectionById(collectionId)).toJSON();
 
     // What to expect
     expect(result.success).to.be.true;
@@ -839,7 +838,7 @@
     const result = getGenericResult(events);
 
     // Get the collection
-    const collection: any = (await api.query.nft.collection(collectionId)).toJSON();
+    const collection: any = (await api.query.nft.collectionById(collectionId)).toJSON();
 
     // What to expect
     // tslint:disable-next-line:no-unused-expression
@@ -865,7 +864,7 @@
     const result = getGenericResult(events);
 
     // Get the collection
-    const collection: any = (await api.query.nft.collection(collectionId)).toJSON();
+    const collection: any = (await api.query.nft.collectionById(collectionId)).toJSON();
 
     // What to expect
     // tslint:disable-next-line:no-unused-expression
@@ -947,7 +946,7 @@
 
 export const getDetailedCollectionInfo = async (api: ApiPromise, collectionId: number)
   : Promise<ICollectionInterface | null> => {
-  return await api.query.nft.collection(collectionId) as unknown as ICollectionInterface;
+  return (await api.query.nft.collectionById(collectionId)).toJSON() as unknown as ICollectionInterface;
 };
 
 export const getCreatedCollectionCount = async (api: ApiPromise): Promise<number> => {
@@ -957,6 +956,6 @@
 
 export async function queryCollectionExpectSuccess(collectionId: number): Promise<ICollectionInterface> {
   return await usingApi(async (api) => {
-    return (await api.query.nft.collection(collectionId)) as unknown as ICollectionInterface;
+    return (await api.query.nft.collectionById(collectionId)).toJSON() as unknown as ICollectionInterface;
   });
 }