git.delta.rocks / unique-network / refs/commits / c9b52e8d7f58

--- a/.maintain/scripts/generate_api.sh
+++ b/.maintain/scripts/generate_api.sh
@@ -7,6 +7,5 @@
 sed -n '/=== SNIP START ===/, /=== SNIP END ===/{ /=== SNIP START ===/! { /=== SNIP END ===/! p } }' $tmp > $raw
 formatted=$(mktemp)
 prettier --use-tabs $raw > $formatted
-solhint --fix $formatted
 
 mv $formatted $OUTPUT

--- a/Cargo.lock
+++ b/Cargo.lock
@@ -6391,6 +6391,7 @@
  "sp-core",
  "sp-runtime",
  "sp-std",
+ "struct-versioning",
  "up-data-structs",
 ]
 
@@ -6508,6 +6509,7 @@
  "sp-core",
  "sp-runtime",
  "sp-std",
+ "struct-versioning",
  "up-data-structs",
 ]
 

--- a/client/rpc/src/lib.rs
+++ b/client/rpc/src/lib.rs
@@ -30,8 +30,8 @@
 // RMRK
 use rmrk_rpc::RmrkApi as RmrkRuntimeApi;
 use up_data_structs::{
-	RmrkCollectionId, RmrkNftId, RmrkBaseId, RmrkNftChild,
-	RmrkThemeName, RmrkPropertyKey, RmrkResourceId
+	RmrkCollectionId, RmrkNftId, RmrkBaseId, RmrkNftChild, RmrkThemeName, RmrkPropertyKey,
+	RmrkResourceId,
 };
 
 pub use rmrk_unique_rpc::RmrkApi;
@@ -75,13 +75,6 @@
 	) -> Result<Option<CrossAccountId>>;
 	#[rpc(name = "unique_constMetadata")]
 	fn const_metadata(
-		&self,
-		collection: CollectionId,
-		token: TokenId,
-		at: Option<BlockHash>,
-	) -> Result<Vec<u8>>;
-	#[rpc(name = "unique_variableMetadata")]
-	fn variable_metadata(
 		&self,
 		collection: CollectionId,
 		token: TokenId,
@@ -92,7 +85,7 @@
 	fn collection_properties(
 		&self,
 		collection: CollectionId,
-		keys: Vec<String>,
+		keys: Option<Vec<String>>,
 		at: Option<BlockHash>,
 	) -> Result<Vec<Property>>;
 
@@ -101,7 +94,7 @@
 		&self,
 		collection: CollectionId,
 		token_id: TokenId,
-		properties: Vec<String>,
+		keys: Option<Vec<String>>,
 		at: Option<BlockHash>,
 	) -> Result<Vec<Property>>;
 
@@ -109,7 +102,7 @@
 	fn property_permissions(
 		&self,
 		collection: CollectionId,
-		keys: Vec<String>,
+		keys: Option<Vec<String>>,
 		at: Option<BlockHash>,
 	) -> Result<Vec<PropertyKeyPermission>>;
 
@@ -118,7 +111,7 @@
 		&self,
 		collection: CollectionId,
 		token_id: TokenId,
-		keys: Vec<String>,
+		keys: Option<Vec<String>>,
 		at: Option<BlockHash>,
 	) -> Result<TokenData<CrossAccountId>>;
 
@@ -428,10 +421,6 @@
 	);
 	pass_method!(
 		const_metadata(collection: CollectionId, token: TokenId) -> Vec<u8>, unique_api
-	);
-	pass_method!(
-		variable_metadata(collection: CollectionId, token: TokenId) -> Vec<u8>,
-		unique_api
 	);
 	pass_method!(total_supply(collection: CollectionId) -> u32, unique_api);
 	pass_method!(account_balance(collection: CollectionId, account: CrossAccountId) -> u32, unique_api);
@@ -445,7 +434,7 @@
 		collection: CollectionId,
 
 		#[map(|keys| string_keys_to_bytes_keys(keys))]
-		keys: Vec<String>
+		keys: Option<Vec<String>>
 	) -> Vec<Property>, unique_api);
 
 	pass_method!(token_properties(
@@ -453,14 +442,14 @@
 		token_id: TokenId,
 
 		#[map(|keys| string_keys_to_bytes_keys(keys))]
-		properties: Vec<String>
+		keys: Option<Vec<String>>
 	) -> Vec<Property>, unique_api);
 
 	pass_method!(property_permissions(
 		collection: CollectionId,
 
 		#[map(|keys| string_keys_to_bytes_keys(keys))]
-		keys: Vec<String>
+		keys: Option<Vec<String>>
 	) -> Vec<PropertyKeyPermission>, unique_api);
 
 	pass_method!(token_data(
@@ -468,7 +457,7 @@
 		token_id: TokenId,
 
 		#[map(|keys| string_keys_to_bytes_keys(keys))]
-		keys: Vec<String>,
+		keys: Option<Vec<String>>,
 	) -> TokenData<CrossAccountId>, unique_api);
 
 	pass_method!(adminlist(collection: CollectionId) -> Vec<CrossAccountId>, unique_api);
@@ -549,6 +538,6 @@
 	pass_method!(theme(base_id: RmrkBaseId, theme_name: RmrkThemeName, filter_keys: Option<Vec<RmrkPropertyKey>>) -> Option<Theme>, rmrk_api);
 }
 
-fn string_keys_to_bytes_keys(keys: Vec<String>) -> Vec<Vec<u8>> {
-	keys.into_iter().map(|key| key.into_bytes()).collect()
+fn string_keys_to_bytes_keys(keys: Option<Vec<String>>) -> Option<Vec<Vec<u8>>> {
+	keys.map(|keys| keys.into_iter().map(|key| key.into_bytes()).collect())
 }

--- a/node/cli/src/service.rs
+++ b/node/cli/src/service.rs
@@ -65,25 +65,12 @@
 use fc_rpc_core::types::FilterPool;
 use fc_mapping_sync::{MappingSyncWorker, SyncStrategy};
 
-use unique_runtime_common::types::{
-	AuraId,
-	RuntimeInstance,
-	AccountId,
-	Balance,
-	Index,
-	Hash,
-	Block,
-};
+use unique_runtime_common::types::{AuraId, RuntimeInstance, AccountId, Balance, Index, Hash, Block};
 
 // RMRK
 use up_data_structs::{
-	RmrkCollectionInfo,
-	RmrkInstanceInfo,
-	RmrkResourceInfo,
-	RmrkPropertyInfo,
-	RmrkBaseInfo,
-	RmrkPartType,
-	RmrkTheme,
+	RmrkCollectionInfo, RmrkInstanceInfo, RmrkResourceInfo, RmrkPropertyInfo, RmrkBaseInfo,
+	RmrkPartType, RmrkTheme,
 };
 
 /// Unique native executor instance.

--- a/node/rpc/src/lib.rs
+++ b/node/rpc/src/lib.rs
@@ -41,17 +41,12 @@
 use std::{collections::BTreeMap, sync::Arc};
 
 use unique_runtime_common::types::{
-	Hash,
-	AccountId,
-	RuntimeInstance,
-	Index,
-	Block,
-	BlockNumber,
-	Balance,
+	Hash, AccountId, RuntimeInstance, Index, Block, BlockNumber, Balance,
 };
 // RMRK
 use up_data_structs::{
-	RmrkCollectionInfo, RmrkInstanceInfo, RmrkResourceInfo, RmrkPropertyInfo, RmrkBaseInfo, RmrkPartType, RmrkTheme, 
+	RmrkCollectionInfo, RmrkInstanceInfo, RmrkResourceInfo, RmrkPropertyInfo, RmrkBaseInfo,
+	RmrkPartType, RmrkTheme,
 };
 
 /// Public io handler for exporting into other modules

--- a/pallets/common/src/erc.rs
+++ b/pallets/common/src/erc.rs
@@ -21,7 +21,7 @@
 use sp_std::vec::Vec;
 use up_data_structs::Property;
 
-use crate::{Pallet, CollectionHandle, Config};
+use crate::{Pallet, CollectionHandle, Config, CollectionProperties};
 
 /// Does not always represent a full collection, for RFT it is either
 /// collection (Implementing ERC721), or specific collection token (Implementing ERC20)
@@ -33,24 +33,35 @@
 
 #[solidity_interface(name = "CollectionProperties")]
 impl<T: Config> CollectionHandle<T> {
-	fn set_property(&mut self, caller: caller, key: string, value: string) -> Result<()> {
-		<Pallet<T>>::set_collection_property(
-			self,
-			&T::CrossAccountId::from_eth(caller),
-			Property {
-				key: <Vec<u8>>::from(key)
-					.try_into()
-					.map_err(|_| "key too large")?,
-				value: <Vec<u8>>::from(value)
-					.try_into()
-					.map_err(|_| "value too large")?,
-			},
-		)
-		.map_err(dispatch_to_evm::<T>)?;
-		Ok(())
+	fn set_collection_property(&mut self, caller: caller, key: string, value: bytes) -> Result<()> {
+		let caller = T::CrossAccountId::from_eth(caller);
+		let key = <Vec<u8>>::from(key)
+			.try_into()
+			.map_err(|_| "key too large")?;
+		let value = value.try_into().map_err(|_| "value too large")?;
+
+		<Pallet<T>>::set_collection_property(self, &caller, Property { key, value })
+			.map_err(dispatch_to_evm::<T>)
 	}
 
-	fn delete_property(&mut self, caller: caller, key: string) -> Result<()> {
-		self.set_property(caller, key, string::new())
+	fn delete_collection_property(&mut self, caller: caller, key: string) -> Result<()> {
+		let caller = T::CrossAccountId::from_eth(caller);
+		let key = <Vec<u8>>::from(key)
+			.try_into()
+			.map_err(|_| "key too large")?;
+
+		<Pallet<T>>::delete_collection_property(self, &caller, key).map_err(dispatch_to_evm::<T>)
+	}
+
+	/// Throws error if key not found
+	fn collection_property(&self, key: string) -> Result<bytes> {
+		let key = <Vec<u8>>::from(key)
+			.try_into()
+			.map_err(|_| "key too large")?;
+
+		let props = <CollectionProperties<T>>::get(self.id);
+		let prop = props.get(&key).ok_or("key not found")?;
+
+		Ok(prop.to_vec())
 	}
 }

--- a/pallets/common/src/lib.rs
+++ b/pallets/common/src/lib.rs
@@ -22,23 +22,56 @@
 use pallet_evm::account::CrossAccountId;
 use frame_support::{
 	dispatch::{DispatchErrorWithPostInfo, DispatchResultWithPostInfo, Weight, PostDispatchInfo},
-	ensure, fail,
+	ensure,
 	traits::{Imbalance, Get, Currency, WithdrawReasons, ExistenceRequirement},
 	BoundedVec,
 	weights::Pays,
+	transactional,
 };
 use pallet_evm::GasWeightMapping;
 use up_data_structs::{
-	COLLECTION_NUMBER_LIMIT, Collection, RpcCollection, CollectionId, CreateItemData,
-	MAX_TOKEN_PREFIX_LENGTH, COLLECTION_ADMINS_LIMIT, MetaUpdatePermission, TokenId,
-	CollectionStats, MAX_TOKEN_OWNERSHIP, CollectionMode, NFT_SPONSOR_TRANSFER_TIMEOUT,
-	FUNGIBLE_SPONSOR_TRANSFER_TIMEOUT, REFUNGIBLE_SPONSOR_TRANSFER_TIMEOUT, MAX_SPONSOR_TIMEOUT,
-	CUSTOM_DATA_LIMIT, CollectionLimits, CustomDataLimit, CreateCollectionData, SponsorshipState,
-	CreateItemExData, SponsoringRateLimit, budget::Budget, COLLECTION_FIELD_LIMIT, CollectionField,
-	PhantomType, Property, Properties, PropertiesPermissionMap, PropertyKey, PropertyPermission,
-	PropertiesError, PropertyKeyPermission, TokenData, TrySet,
+	COLLECTION_NUMBER_LIMIT,
+	Collection,
+	RpcCollection,
+	CollectionId,
+	CreateItemData,
+	MAX_TOKEN_PREFIX_LENGTH,
+	COLLECTION_ADMINS_LIMIT,
+	TokenId,
+	CollectionStats,
+	MAX_TOKEN_OWNERSHIP,
+	CollectionMode,
+	NFT_SPONSOR_TRANSFER_TIMEOUT,
+	FUNGIBLE_SPONSOR_TRANSFER_TIMEOUT,
+	REFUNGIBLE_SPONSOR_TRANSFER_TIMEOUT,
+	MAX_SPONSOR_TIMEOUT,
+	CUSTOM_DATA_LIMIT,
+	CollectionLimits,
+	CreateCollectionData,
+	SponsorshipState,
+	CreateItemExData,
+	SponsoringRateLimit,
+	budget::Budget,
+	COLLECTION_FIELD_LIMIT,
+	CollectionField,
+	PhantomType,
+	Property,
+	Properties,
+	PropertiesPermissionMap,
+	PropertyKey,
+	PropertyPermission,
+	PropertiesError,
+	PropertyKeyPermission,
+	TokenData,
+	TrySetProperty,
 	// RMRK
-	RmrkCollectionInfo, RmrkInstanceInfo, RmrkResourceInfo, RmrkPropertyInfo, RmrkBaseInfo, RmrkPartType, RmrkTheme,
+	RmrkCollectionInfo,
+	RmrkInstanceInfo,
+	RmrkResourceInfo,
+	RmrkPropertyInfo,
+	RmrkBaseInfo,
+	RmrkPartType,
+	RmrkTheme,
 	RmrkNftChild,
 };
 
@@ -138,21 +171,6 @@
 			<Error<T>>::AddressNotInAllowlist
 		);
 		Ok(())
-	}
-
-	pub fn check_can_update_meta(
-		&self,
-		subject: &T::CrossAccountId,
-		item_owner: &T::CrossAccountId,
-	) -> DispatchResult {
-		match self.meta_update_permission {
-			MetaUpdatePermission::ItemOwner => {
-				ensure!(subject == item_owner, <Error<T>>::NoPermission);
-				Ok(())
-			}
-			MetaUpdatePermission::Admin => self.check_is_owner_or_admin(subject),
-			MetaUpdatePermission::None => fail!(<Error<T>>::NoPermission),
-		}
 	}
 }
 
@@ -316,8 +334,6 @@
 		CollectionTokenPrefixLimitExceeded,
 		/// Total collections bound exceeded.
 		TotalCollectionsLimitExceeded,
-		/// variable_data exceeded data limit.
-		TokenVariableDataLimitExceeded,
 		/// Exceeded max admin count
 		CollectionAdminCountExceeded,
 		/// Collection limit bounds per collection exceeded
@@ -366,8 +382,8 @@
 		/// Tried to store more property keys than allowed
 		PropertyLimitReached,
 
-		/// Unable to read array of unbounded keys
-		UnableToReadUnboundedKeys,
+		/// Property key is too long
+		PropertyKeyIsTooLong,
 
 		/// Only ASCII letters, digits, and '_', '-' are allowed
 		InvalidCharacterInPropertyKey,
@@ -580,7 +596,6 @@
 			schema_version,
 			sponsorship,
 			limits,
-			meta_update_permission,
 		} = <CollectionById<T>>::get(collection)?;
 
 		let token_property_permissions = <CollectionPropertyPermissions<T>>::get(collection)
@@ -610,7 +625,6 @@
 			schema_version,
 			sponsorship,
 			limits,
-			meta_update_permission,
 			offchain_schema: <CollectionData<T>>::get((
 				collection,
 				CollectionField::OffchainSchema,
@@ -671,7 +685,6 @@
 				.limits
 				.map(|limits| Self::clamp_limits(data.mode.clone(), &Default::default(), limits))
 				.unwrap_or_else(|| Ok(CollectionLimits::default()))?,
-			meta_update_permission: data.meta_update_permission.unwrap_or_default(),
 		};
 
 		let mut collection_properties = up_data_structs::CollectionProperties::get();
@@ -775,6 +788,7 @@
 		Ok(())
 	}
 
+	#[transactional]
 	pub fn set_collection_properties(
 		collection: &CollectionHandle<T>,
 		sender: &T::CrossAccountId,
@@ -807,6 +821,7 @@
 		Ok(())
 	}
 
+	#[transactional]
 	pub fn delete_collection_properties(
 		collection: &CollectionHandle<T>,
 		sender: &T::CrossAccountId,
@@ -849,6 +864,7 @@
 		Ok(())
 	}
 
+	#[transactional]
 	pub fn set_property_permissions(
 		collection: &CollectionHandle<T>,
 		sender: &T::CrossAccountId,
@@ -867,60 +883,69 @@
 		keys.into_iter()
 			.map(|key| -> Result<PropertyKey, DispatchError> {
 				key.try_into()
-					.map_err(|_| <Error<T>>::UnableToReadUnboundedKeys.into())
+					.map_err(|_| <Error<T>>::PropertyKeyIsTooLong.into())
 			})
 			.collect::<Result<Vec<PropertyKey>, DispatchError>>()
-	}
-
-	pub fn check_property_key(key: &PropertyKey) -> Result<(), DispatchError> {
-		let key_str = sp_std::str::from_utf8(key.as_slice())
-			.map_err(|_| <Error<T>>::InvalidCharacterInPropertyKey)?;
-
-		for ch in key_str.chars() {
-			if !ch.is_ascii_alphanumeric() && ch != '_' && ch != '-' {
-				return Err(<Error<T>>::InvalidCharacterInPropertyKey.into());
-			}
-		}
-
-		Ok(())
 	}
 
 	pub fn filter_collection_properties(
 		collection_id: CollectionId,
-		keys: Vec<PropertyKey>,
+		keys: Option<Vec<PropertyKey>>,
 	) -> Result<Vec<Property>, DispatchError> {
 		let properties = Self::collection_properties(collection_id);
 
 		let properties = keys
-			.into_iter()
-			.filter_map(|key| {
-				properties.get(&key).map(|value| Property {
-					key,
-					value: value.clone(),
-				})
+			.map(|keys| {
+				keys.into_iter()
+					.filter_map(|key| {
+						properties.get(&key).map(|value| Property {
+							key,
+							value: value.clone(),
+						})
+					})
+					.collect()
 			})
-			.collect();
+			.unwrap_or_else(|| {
+				properties
+					.iter()
+					.map(|(key, value)| Property {
+						key: key.clone(),
+						value: value.clone(),
+					})
+					.collect()
+			});
 
 		Ok(properties)
 	}
 
 	pub fn filter_property_permissions(
 		collection_id: CollectionId,
-		keys: Vec<PropertyKey>,
+		keys: Option<Vec<PropertyKey>>,
 	) -> Result<Vec<PropertyKeyPermission>, DispatchError> {
 		let permissions = Self::property_permissions(collection_id);
 
 		let key_permissions = keys
-			.into_iter()
-			.filter_map(|key| {
+			.map(|keys| {
+				keys.into_iter()
+					.filter_map(|key| {
+						permissions
+							.get(&key)
+							.map(|permission| PropertyKeyPermission {
+								key,
+								permission: permission.clone(),
+							})
+					})
+					.collect()
+			})
+			.unwrap_or_else(|| {
 				permissions
-					.get(&key)
-					.map(|permission| PropertyKeyPermission {
-						key,
+					.iter()
+					.map(|(key, permission)| PropertyKeyPermission {
+						key: key.clone(),
 						permission: permission.clone(),
 					})
-			})
-			.collect();
+					.collect()
+			});
 
 		Ok(key_permissions)
 	}
@@ -1086,7 +1111,6 @@
 	fn approve() -> Weight;
 	fn transfer_from() -> Weight;
 	fn burn_from() -> Weight;
-	fn set_variable_metadata(bytes: u32) -> Weight;
 }
 
 pub trait CommonCollectionOperations<T: Config> {
@@ -1174,13 +1198,6 @@
 		token: TokenId,
 		amount: u128,
 		nesting_budget: &dyn Budget,
-	) -> DispatchResultWithPostInfo;
-
-	fn set_variable_metadata(
-		&self,
-		sender: T::CrossAccountId,
-		token: TokenId,
-		data: BoundedVec<u8, CustomDataLimit>,
 	) -> DispatchResultWithPostInfo;
 
 	fn check_nesting(
@@ -1198,8 +1215,7 @@
 
 	fn token_owner(&self, token: TokenId) -> Option<T::CrossAccountId>;
 	fn const_metadata(&self, token: TokenId) -> Vec<u8>;
-	fn variable_metadata(&self, token: TokenId) -> Vec<u8>;
-	fn token_properties(&self, token_id: TokenId, keys: Vec<PropertyKey>) -> Vec<Property>;
+	fn token_properties(&self, token_id: TokenId, keys: Option<Vec<PropertyKey>>) -> Vec<Property>;
 	/// Amount of unique collection tokens
 	fn total_supply(&self) -> u32;
 	/// Amount of different tokens account has (Applicable to nonfungible/refungible)
@@ -1232,6 +1248,7 @@
 			PropertiesError::NoSpaceForProperty => Self::NoSpaceForProperty,
 			PropertiesError::PropertyLimitReached => Self::PropertyLimitReached,
 			PropertiesError::InvalidCharacterInPropertyKey => Self::InvalidCharacterInPropertyKey,
+			PropertiesError::PropertyKeyIsTooLong => Self::PropertyKeyIsTooLong,
 			PropertiesError::EmptyPropertyKey => Self::EmptyPropertyKey,
 		}
 	}

binary blob — no preview

--- a/pallets/fungible/src/common.rs
+++ b/pallets/fungible/src/common.rs
@@ -16,12 +16,12 @@
 
 use core::marker::PhantomData;
 
-use frame_support::{dispatch::DispatchResultWithPostInfo, ensure, fail, weights::Weight, BoundedVec};
+use frame_support::{dispatch::DispatchResultWithPostInfo, ensure, fail, weights::Weight};
 use up_data_structs::{TokenId, CollectionId, CreateItemExData, budget::Budget};
 use pallet_common::{CommonCollectionOperations, CommonWeightInfo, with_weight};
 use sp_runtime::ArithmeticError;
 use sp_std::{vec::Vec, vec};
-use up_data_structs::{CustomDataLimit, Property, PropertyKey, PropertyKeyPermission};
+use up_data_structs::{Property, PropertyKey, PropertyKeyPermission};
 
 use crate::{
 	Allowance, Balance, Config, Error, FungibleHandle, Pallet, SelfWeightOf, weights::WeightInfo,
@@ -84,11 +84,6 @@
 
 	fn burn_from() -> Weight {
 		<SelfWeightOf<T>>::burn_from()
-	}
-
-	fn set_variable_metadata(_bytes: u32) -> Weight {
-		// Error
-		0
 	}
 }
 
@@ -287,15 +282,6 @@
 		fail!(<Error<T>>::SettingPropertiesNotAllowed)
 	}
 
-	fn set_variable_metadata(
-		&self,
-		_sender: T::CrossAccountId,
-		_token: TokenId,
-		_data: BoundedVec<u8, CustomDataLimit>,
-	) -> DispatchResultWithPostInfo {
-		fail!(<Error<T>>::FungibleItemsDontHaveData)
-	}
-
 	fn check_nesting(
 		&self,
 		_sender: <T>::CrossAccountId,
@@ -330,13 +316,14 @@
 		None
 	}
 	fn const_metadata(&self, _token: TokenId) -> Vec<u8> {
-		Vec::new()
-	}
-	fn variable_metadata(&self, _token: TokenId) -> Vec<u8> {
 		Vec::new()
 	}
 
-	fn token_properties(&self, _token_id: TokenId, _keys: Vec<PropertyKey>) -> Vec<Property> {
+	fn token_properties(
+		&self,
+		_token_id: TokenId,
+		_keys: Option<Vec<PropertyKey>>,
+	) -> Vec<Property> {
 		Vec::new()
 	}
 

binary blob — no preview

--- a/pallets/fungible/src/stubs/UniqueFungible.sol
+++ b/pallets/fungible/src/stubs/UniqueFungible.sol
@@ -8,8 +8,13 @@
 	uint8 dummy;
 	string stub_error = "this contract is implemented in native";
 }
+
 contract ERC165 is Dummy {
-	function supportsInterface(bytes4 interfaceID) external view returns (bool) {
+	function supportsInterface(bytes4 interfaceID)
+		external
+		view
+		returns (bool)
+	{
 		require(false, stub_error);
 		interfaceID;
 		return true;
@@ -19,24 +24,11 @@
 // Inline
 contract ERC20Events {
 	event Transfer(address indexed from, address indexed to, uint256 value);
-	event Approval(address indexed owner, address indexed spender, uint256 value);
-}
-
-// Selector: 56fd500b
-contract CollectionProperties is Dummy, ERC165 {
-	// Selector: setProperty(string,string) 62d9491f
-	function setProperty(string memory key, string memory value) public {
-		require(false, stub_error);
-		key;
-		value;
-		dummy = 0;
-	}
-	// Selector: deleteProperty(string) 34241914
-	function deleteProperty(string memory key) public {
-		require(false, stub_error);
-		key;
-		dummy = 0;
-	}
+	event Approval(
+		address indexed owner,
+		address indexed spender,
+		uint256 value
+	);
 }
 
 // Selector: 79cc6790
@@ -59,24 +51,28 @@
 		dummy;
 		return "";
 	}
+
 	// Selector: symbol() 95d89b41
 	function symbol() public view returns (string memory) {
 		require(false, stub_error);
 		dummy;
 		return "";
 	}
+
 	// Selector: totalSupply() 18160ddd
 	function totalSupply() public view returns (uint256) {
 		require(false, stub_error);
 		dummy;
 		return 0;
 	}
+
 	// Selector: decimals() 313ce567
 	function decimals() public view returns (uint8) {
 		require(false, stub_error);
 		dummy;
 		return 0;
 	}
+
 	// Selector: balanceOf(address) 70a08231
 	function balanceOf(address owner) public view returns (uint256) {
 		require(false, stub_error);
@@ -84,6 +80,7 @@
 		dummy;
 		return 0;
 	}
+
 	// Selector: transfer(address,uint256) a9059cbb
 	function transfer(address to, uint256 amount) public returns (bool) {
 		require(false, stub_error);
@@ -92,8 +89,13 @@
 		dummy = 0;
 		return false;
 	}
+
 	// Selector: transferFrom(address,address,uint256) 23b872dd
-	function transferFrom(address from, address to, uint256 amount) public returns (bool) {
+	function transferFrom(
+		address from,
+		address to,
+		uint256 amount
+	) public returns (bool) {
 		require(false, stub_error);
 		from;
 		to;
@@ -101,6 +103,7 @@
 		dummy = 0;
 		return false;
 	}
+
 	// Selector: approve(address,uint256) 095ea7b3
 	function approve(address spender, uint256 amount) public returns (bool) {
 		require(false, stub_error);
@@ -109,8 +112,13 @@
 		dummy = 0;
 		return false;
 	}
+
 	// Selector: allowance(address,address) dd62ed3e
-	function allowance(address owner, address spender) public view returns (uint256) {
+	function allowance(address owner, address spender)
+		public
+		view
+		returns (uint256)
+	{
 		require(false, stub_error);
 		owner;
 		spender;
@@ -119,6 +127,44 @@
 	}
 }
 
-contract UniqueFungible is Dummy, ERC165, ERC20, ERC20UniqueExtensions, CollectionProperties {
+// Selector: 9b5e29c5
+contract CollectionProperties is Dummy, ERC165 {
+	// Selector: setCollectionProperty(string,bytes) 2f073f66
+	function setCollectionProperty(string memory key, bytes memory value)
+		public
+	{
+		require(false, stub_error);
+		key;
+		value;
+		dummy = 0;
+	}
+
+	// Selector: deleteCollectionProperty(string) 7b7debce
+	function deleteCollectionProperty(string memory key) public {
+		require(false, stub_error);
+		key;
+		dummy = 0;
+	}
+
+	// Throws error if key not found
+	//
+	// Selector: collectionProperty(string) cf24fd6d
+	function collectionProperty(string memory key)
+		public
+		view
+		returns (bytes memory)
+	{
+		require(false, stub_error);
+		key;
+		dummy;
+		return hex"";
+	}
 }
 
+contract UniqueFungible is
+	Dummy,
+	ERC165,
+	ERC20,
+	ERC20UniqueExtensions,
+	CollectionProperties
+{}

--- a/pallets/nonfungible/Cargo.toml
+++ b/pallets/nonfungible/Cargo.toml
@@ -27,6 +27,7 @@
 scale-info = { version = "2.0.1", default-features = false, features = [
     "derive",
 ] }
+struct-versioning = { path = "../../crates/struct-versioning" }
 
 [features]
 default = ["std"]

--- a/pallets/nonfungible/src/benchmarking.rs
+++ b/pallets/nonfungible/src/benchmarking.rs
@@ -28,12 +28,7 @@
 
 fn create_max_item_data<T: Config>(owner: T::CrossAccountId) -> CreateItemData<T> {
 	let const_data = create_data::<CUSTOM_DATA_LIMIT>();
-	let variable_data = create_data::<CUSTOM_DATA_LIMIT>();
-	CreateItemData::<T> {
-		const_data,
-		variable_data,
-		owner,
-	}
+	CreateItemData::<T> { const_data, owner }
 }
 fn create_max_item<T: Config>(
 	collection: &NonfungibleHandle<T>,
@@ -125,14 +120,4 @@
 		let item = create_max_item(&collection, &owner, sender.clone())?;
 		<Pallet<T>>::set_allowance(&collection, &sender, item, Some(&burner))?;
 	}: {<Pallet<T>>::burn_from(&collection, &burner, &sender, item, &Unlimited)?}
-
-	set_variable_metadata {
-		let b in 0..CUSTOM_DATA_LIMIT;
-		bench_init!{
-			owner: sub; collection: collection(owner);
-			owner: cross_from_sub; sender: cross_sub;
-		};
-		let item = create_max_item(&collection, &owner, sender.clone())?;
-		let data = create_var_data(b).try_into().unwrap();
-	}: {<Pallet<T>>::set_variable_metadata(&collection, &sender, item, data)?}
 }

--- a/pallets/nonfungible/src/common.rs
+++ b/pallets/nonfungible/src/common.rs
@@ -16,10 +16,10 @@
 
 use core::marker::PhantomData;
 
-use frame_support::{dispatch::DispatchResultWithPostInfo, ensure, fail, weights::Weight, BoundedVec};
+use frame_support::{dispatch::DispatchResultWithPostInfo, ensure, fail, weights::Weight};
 use up_data_structs::{
-	TokenId, CustomDataLimit, CreateItemExData, CollectionId, budget::Budget, Property,
-	PropertyKey, PropertyKeyPermission,
+	TokenId, CreateItemExData, CollectionId, budget::Budget, Property, PropertyKey,
+	PropertyKeyPermission,
 };
 use pallet_common::{CommonCollectionOperations, CommonWeightInfo, with_weight};
 use sp_runtime::DispatchError;
@@ -86,10 +86,6 @@
 	fn burn_from() -> Weight {
 		<SelfWeightOf<T>>::burn_from()
 	}
-
-	fn set_variable_metadata(bytes: u32) -> Weight {
-		<SelfWeightOf<T>>::set_variable_metadata(bytes)
-	}
 }
 
 fn map_create_data<T: Config>(
@@ -99,7 +95,6 @@
 	match data {
 		up_data_structs::CreateItemData::NFT(data) => Ok(CreateItemData::<T> {
 			const_data: data.const_data,
-			variable_data: data.variable_data,
 			properties: data.properties,
 			owner: to.clone(),
 		}),
@@ -184,7 +179,7 @@
 		let weight = <CommonWeights<T>>::delete_collection_properties(property_keys.len() as u32);
 
 		with_weight(
-			<Pallet<T>>::delete_collection_properties(self, &sender, property_keys),
+			<Pallet<T>>::delete_collection_properties(self, sender, property_keys),
 			weight,
 		)
 	}
@@ -327,19 +322,6 @@
 		}
 	}
 
-	fn set_variable_metadata(
-		&self,
-		sender: T::CrossAccountId,
-		token: TokenId,
-		data: BoundedVec<u8, CustomDataLimit>,
-	) -> DispatchResultWithPostInfo {
-		let len = data.len();
-		with_weight(
-			<Pallet<T>>::set_variable_metadata(self, &sender, token, data),
-			<CommonWeights<T>>::set_variable_metadata(len as u32),
-		)
-	}
-
 	fn check_nesting(
 		&self,
 		sender: T::CrossAccountId,
@@ -379,24 +361,29 @@
 			.unwrap_or_default()
 			.into_inner()
 	}
-	fn variable_metadata(&self, token: TokenId) -> Vec<u8> {
-		<TokenData<T>>::get((self.id, token))
-			.map(|t| t.variable_data)
-			.unwrap_or_default()
-			.into_inner()
-	}
 
-	fn token_properties(&self, token_id: TokenId, keys: Vec<PropertyKey>) -> Vec<Property> {
+	fn token_properties(&self, token_id: TokenId, keys: Option<Vec<PropertyKey>>) -> Vec<Property> {
 		let properties = <Pallet<T>>::token_properties((self.id, token_id));
 
-		keys.into_iter()
-			.filter_map(|key| {
-				properties.get(&key).map(|value| Property {
-					key,
+		keys.map(|keys| {
+			keys.into_iter()
+				.filter_map(|key| {
+					properties.get(&key).map(|value| Property {
+						key,
+						value: value.clone(),
+					})
+				})
+				.collect()
+		})
+		.unwrap_or_else(|| {
+			properties
+				.iter()
+				.map(|(key, value)| Property {
+					key: key.clone(),
 					value: value.clone(),
 				})
-			})
-			.collect()
+				.collect()
+		})
 	}
 
 	fn total_supply(&self) -> u32 {

--- a/pallets/nonfungible/src/erc.rs
+++ b/pallets/nonfungible/src/erc.rs
@@ -21,10 +21,10 @@
 };
 use evm_coder::{ToLog, execution::*, generate_stubgen, solidity, solidity_interface, types::*, weight};
 use frame_support::BoundedVec;
-use up_data_structs::{TokenId, SchemaVersion};
+use up_data_structs::{TokenId, SchemaVersion, PropertyPermission, PropertyKeyPermission, Property};
 use pallet_evm_coder_substrate::dispatch_to_evm;
 use sp_core::{H160, U256};
-use sp_std::{vec::Vec, vec};
+use sp_std::vec::Vec;
 use pallet_common::{
 	erc::{CommonEvmHandler, PrecompileResult, CollectionPropertiesCall},
 	CollectionHandle,
@@ -35,9 +35,80 @@
 
 use crate::{
 	AccountBalance, Config, CreateItemData, NonfungibleHandle, Pallet, TokenData, TokensMinted,
-	SelfWeightOf, weights::WeightInfo,
+	SelfWeightOf, weights::WeightInfo, TokenProperties,
 };
 
+#[solidity_interface(name = "TokenProperties")]
+impl<T: Config> NonfungibleHandle<T> {
+	fn set_token_property_permission(
+		&mut self,
+		caller: caller,
+		key: string,
+		is_mutable: bool,
+		collection_admin: bool,
+		token_owner: bool,
+	) -> Result<()> {
+		let caller = T::CrossAccountId::from_eth(caller);
+		<Pallet<T>>::set_property_permission(
+			self,
+			&caller,
+			PropertyKeyPermission {
+				key: <Vec<u8>>::from(key)
+					.try_into()
+					.map_err(|_| "too long key")?,
+				permission: PropertyPermission {
+					mutable: is_mutable,
+					collection_admin,
+					token_owner,
+				},
+			},
+		)
+		.map_err(dispatch_to_evm::<T>)
+	}
+
+	fn set_property(
+		&mut self,
+		caller: caller,
+		token_id: uint256,
+		key: string,
+		value: bytes,
+	) -> Result<()> {
+		let caller = T::CrossAccountId::from_eth(caller);
+		let token_id: u32 = token_id.try_into().map_err(|_| "token id overflow")?;
+		let key = <Vec<u8>>::from(key)
+			.try_into()
+			.map_err(|_| "key too long")?;
+		let value = value.try_into().map_err(|_| "value too long")?;
+
+		<Pallet<T>>::set_token_property(self, &caller, TokenId(token_id), Property { key, value })
+			.map_err(dispatch_to_evm::<T>)
+	}
+
+	fn delete_property(&mut self, token_id: uint256, caller: caller, key: string) -> Result<()> {
+		let caller = T::CrossAccountId::from_eth(caller);
+		let token_id: u32 = token_id.try_into().map_err(|_| "token id overflow")?;
+		let key = <Vec<u8>>::from(key)
+			.try_into()
+			.map_err(|_| "key too long")?;
+
+		<Pallet<T>>::delete_token_property(self, &caller, TokenId(token_id), key)
+			.map_err(dispatch_to_evm::<T>)
+	}
+
+	/// Throws error if key not found
+	fn property(&self, token_id: uint256, key: string) -> Result<bytes> {
+		let token_id: u32 = token_id.try_into().map_err(|_| "token id overflow")?;
+		let key = <Vec<u8>>::from(key)
+			.try_into()
+			.map_err(|_| "key too long")?;
+
+		let props = <TokenProperties<T>>::get((self.id, token_id));
+		let prop = props.get(&key).ok_or("key not found")?;
+
+		Ok(prop.to_vec())
+	}
+}
+
 fn error_unsupported_schema_version() -> Error {
 	alloc::format!(
 		"Unsupported schema version! Support only {:?}",
@@ -274,7 +345,6 @@
 			&caller,
 			CreateItemData::<T> {
 				const_data: BoundedVec::default(),
-				variable_data: BoundedVec::default(),
 				properties: BoundedVec::default(),
 				owner: to,
 			},
@@ -322,7 +392,6 @@
 				const_data: Vec::<u8>::from(token_uri)
 					.try_into()
 					.map_err(|_| "token uri is too long")?,
-				variable_data: BoundedVec::default(),
 				properties: BoundedVec::default(),
 				owner: to,
 			},
@@ -387,37 +456,6 @@
 			.into())
 	}
 
-	#[weight(<SelfWeightOf<T>>::set_variable_metadata(data.len() as u32))]
-	fn set_variable_metadata(
-		&mut self,
-		caller: caller,
-		token_id: uint256,
-		data: bytes,
-	) -> Result<void> {
-		let caller = T::CrossAccountId::from_eth(caller);
-		let token = token_id.try_into()?;
-
-		<Pallet<T>>::set_variable_metadata(
-			self,
-			&caller,
-			token,
-			data.try_into()
-				.map_err(|_| "metadata size exceeded limit")?,
-		)
-		.map_err(dispatch_to_evm::<T>)?;
-		Ok(())
-	}
-
-	fn get_variable_metadata(&self, token_id: uint256) -> Result<bytes> {
-		self.consume_store_reads(1)?;
-		let token: TokenId = token_id.try_into()?;
-
-		Ok(<TokenData<T>>::get((self.id, token))
-			.ok_or("token not found")?
-			.variable_data
-			.into_inner())
-	}
-
 	#[weight(<SelfWeightOf<T>>::create_multiple_items(token_ids.len() as u32))]
 	fn mint_bulk(&mut self, caller: caller, to: address, token_ids: Vec<uint256>) -> Result<bool> {
 		let caller = T::CrossAccountId::from_eth(caller);
@@ -440,7 +478,6 @@
 		let data = (0..total_tokens)
 			.map(|_| CreateItemData::<T> {
 				const_data: BoundedVec::default(),
-				variable_data: BoundedVec::default(),
 				properties: BoundedVec::default(),
 				owner: to.clone(),
 			})
@@ -484,7 +521,6 @@
 				const_data: Vec::<u8>::from(token_uri)
 					.try_into()
 					.map_err(|_| "token uri is too long")?,
-				variable_data: vec![].try_into().unwrap(),
 				properties: BoundedVec::default(),
 				owner: to.clone(),
 			});
@@ -505,7 +541,8 @@
 		ERC721UniqueExtensions,
 		ERC721Mintable,
 		ERC721Burnable,
-		via("CollectionHandle<T>", common_mut, CollectionProperties)
+		via("CollectionHandle<T>", common_mut, CollectionProperties),
+		TokenProperties,
 	)
 )]
 impl<T: Config> NonfungibleHandle<T> {}

--- a/pallets/nonfungible/src/lib.rs
+++ b/pallets/nonfungible/src/lib.rs
@@ -18,11 +18,11 @@
 
 use erc::ERC721Events;
 use evm_coder::ToLog;
-use frame_support::{BoundedVec, ensure, fail};
+use frame_support::{BoundedVec, ensure, fail, transactional};
 use up_data_structs::{
 	AccessMode, CollectionId, CustomDataLimit, TokenId, CreateCollectionData, CreateNftExData,
 	mapping::TokenAddressMapping, NestingRule, budget::Budget, Property, PropertyPermission,
-	PropertyKey, PropertyKeyPermission, Properties, TrySet,
+	PropertyKey, PropertyKeyPermission, Properties, TrySetProperty,
 };
 use pallet_evm::{account::CrossAccountId, Pallet as PalletEvm};
 use pallet_common::{
@@ -49,17 +49,24 @@
 pub type CreateItemData<T> = CreateNftExData<<T as pallet_evm::account::Config>::CrossAccountId>;
 pub(crate) type SelfWeightOf<T> = <T as Config>::WeightInfo;
 
+#[struct_versioning::versioned(version = 2, upper)]
 #[derive(Encode, Decode, TypeInfo, MaxEncodedLen)]
 pub struct ItemData<CrossAccountId> {
 	pub const_data: BoundedVec<u8, CustomDataLimit>,
+
+	#[version(..2)]
 	pub variable_data: BoundedVec<u8, CustomDataLimit>,
+
 	pub owner: CrossAccountId,
 }
 
 #[frame_support::pallet]
 pub mod pallet {
 	use super::*;
-	use frame_support::{Blake2_128Concat, Twox64Concat, pallet_prelude::*, storage::Key};
+	use frame_support::{
+		Blake2_128Concat, Twox64Concat, pallet_prelude::*, storage::Key, traits::StorageVersion,
+	};
+	use frame_system::pallet_prelude::*;
 	use up_data_structs::{CollectionId, TokenId};
 	use super::weights::WeightInfo;
 
@@ -78,7 +85,10 @@
 		type WeightInfo: WeightInfo;
 	}
 
+	const STORAGE_VERSION: StorageVersion = StorageVersion::new(1);
+
 	#[pallet::pallet]
+	#[pallet::storage_version(STORAGE_VERSION)]
 	#[pallet::generate_store(pub(super) trait Store)]
 	pub struct Pallet<T>(_);
 
@@ -133,6 +143,19 @@
 		Value = T::CrossAccountId,
 		QueryKind = OptionQuery,
 	>;
+
+	#[pallet::hooks]
+	impl<T: Config> Hooks<BlockNumberFor<T>> for Pallet<T> {
+		fn on_runtime_upgrade() -> Weight {
+			if StorageVersion::get::<Pallet<T>>() < StorageVersion::new(1) {
+				<TokenData<T>>::translate_values::<ItemDataVersion1<T::CrossAccountId>, _>(|v| {
+					Some(<ItemDataVersion2<T::CrossAccountId>>::from(v))
+				})
+			}
+
+			0
+		}
+	}
 }
 
 pub struct NonfungibleHandle<T: Config>(pallet_common::CollectionHandle<T>);
@@ -286,6 +309,7 @@
 		Ok(())
 	}
 
+	#[transactional]
 	pub fn set_token_properties(
 		collection: &NonfungibleHandle<T>,
 		sender: &T::CrossAccountId,
@@ -329,8 +353,8 @@
 	) -> DispatchResult {
 		let permission = <PalletCommon<T>>::property_permissions(collection.id)
 			.get(property_key)
-			.map(|p| p.clone())
-			.unwrap_or(PropertyPermission::none());
+			.cloned()
+			.unwrap_or_else(PropertyPermission::none);
 
 		let token_data = <TokenData<T>>::get((collection.id, token_id))
 			.ok_or(<CommonError<T>>::TokenNotFound)?;
@@ -369,6 +393,7 @@
 		}
 	}
 
+	#[transactional]
 	pub fn delete_token_properties(
 		collection: &NonfungibleHandle<T>,
 		sender: &T::CrossAccountId,
@@ -406,6 +431,14 @@
 		<PalletCommon<T>>::set_property_permissions(collection, sender, property_permissions)
 	}
 
+	pub fn set_property_permission(
+		collection: &CollectionHandle<T>,
+		sender: &T::CrossAccountId,
+		permission: PropertyKeyPermission,
+	) -> DispatchResult {
+		<PalletCommon<T>>::set_property_permission(collection, sender, permission)
+	}
+
 	pub fn transfer(
 		collection: &NonfungibleHandle<T>,
 		from: &T::CrossAccountId,
@@ -577,7 +610,6 @@
 				(collection.id, token),
 				ItemData {
 					const_data: data.const_data,
-					variable_data: data.variable_data,
 					owner: data.owner.clone(),
 				},
 			);
@@ -773,28 +805,6 @@
 		// =========
 
 		Self::burn(collection, from, token)
-	}
-
-	pub fn set_variable_metadata(
-		collection: &NonfungibleHandle<T>,
-		sender: &T::CrossAccountId,
-		token: TokenId,
-		data: BoundedVec<u8, CustomDataLimit>,
-	) -> DispatchResult {
-		let token_data =
-			<TokenData<T>>::get((collection.id, token)).ok_or(<CommonError<T>>::TokenNotFound)?;
-		collection.check_can_update_meta(sender, &token_data.owner)?;
-
-		// =========
-
-		<TokenData<T>>::insert(
-			(collection.id, token),
-			ItemData {
-				variable_data: data,
-				..token_data
-			},
-		);
-		Ok(())
 	}
 
 	pub fn check_nesting(

binary blob — no preview

--- a/pallets/nonfungible/src/weights.rs
+++ b/pallets/nonfungible/src/weights.rs
@@ -45,7 +45,6 @@
 	fn approve() -> Weight;
 	fn transfer_from() -> Weight;
 	fn burn_from() -> Weight;
-	fn set_variable_metadata(b: u32, ) -> Weight;
 }
 
 /// Weights for pallet_nonfungible using the Substrate node and recommended hardware.
@@ -155,12 +154,6 @@
 		(27_580_000 as Weight)
 			.saturating_add(T::DbWeight::get().reads(4 as Weight))
 			.saturating_add(T::DbWeight::get().writes(5 as Weight))
-	}
-	// Storage: Nonfungible TokenData (r:1 w:1)
-	fn set_variable_metadata(_b: u32, ) -> Weight {
-		(7_700_000 as Weight)
-			.saturating_add(T::DbWeight::get().reads(1 as Weight))
-			.saturating_add(T::DbWeight::get().writes(1 as Weight))
 	}
 }
 
@@ -270,11 +263,5 @@
 		(27_580_000 as Weight)
 			.saturating_add(RocksDbWeight::get().reads(4 as Weight))
 			.saturating_add(RocksDbWeight::get().writes(5 as Weight))
-	}
-	// Storage: Nonfungible TokenData (r:1 w:1)
-	fn set_variable_metadata(_b: u32, ) -> Weight {
-		(7_700_000 as Weight)
-			.saturating_add(RocksDbWeight::get().reads(1 as Weight))
-			.saturating_add(RocksDbWeight::get().writes(1 as Weight))
 	}
 }

--- a/pallets/refungible/Cargo.toml
+++ b/pallets/refungible/Cargo.toml
@@ -24,6 +24,7 @@
 scale-info = { version = "2.0.1", default-features = false, features = [
     "derive",
 ] }
+struct-versioning = { path = "../../crates/struct-versioning" }
 
 [features]
 default = ["std"]

--- a/pallets/refungible/src/benchmarking.rs
+++ b/pallets/refungible/src/benchmarking.rs
@@ -31,10 +31,8 @@
 	users: impl IntoIterator<Item = (CrossAccountId, u128)>,
 ) -> CreateRefungibleExData<CrossAccountId> {
 	let const_data = create_data::<CUSTOM_DATA_LIMIT>();
-	let variable_data = create_data::<CUSTOM_DATA_LIMIT>();
 	CreateRefungibleExData {
 		const_data,
-		variable_data,
 		users: users
 			.into_iter()
 			.collect::<BTreeMap<_, _>>()
@@ -203,14 +201,4 @@
 		let item = create_max_item(&collection, &owner, [(sender.clone(), 200)])?;
 		<Pallet<T>>::set_allowance(&collection, &sender, &burner, item, 200)?;
 	}: {<Pallet<T>>::burn_from(&collection, &burner, &sender, item, 200, &Unlimited)?}
-
-	set_variable_metadata {
-		let b in 0..CUSTOM_DATA_LIMIT;
-		bench_init!{
-			owner: sub; collection: collection(owner);
-			sender: cross_from_sub(owner);
-		};
-		let item = create_max_item(&collection, &sender, [(sender.clone(), 200)])?;
-		let data = create_var_data(b).try_into().unwrap();
-	}: {<Pallet<T>>::set_variable_metadata(&collection, &sender, item, data)?}
 }

--- a/pallets/refungible/src/common.rs
+++ b/pallets/refungible/src/common.rs
@@ -17,10 +17,10 @@
 use core::marker::PhantomData;
 
 use sp_std::collections::btree_map::BTreeMap;
-use frame_support::{dispatch::DispatchResultWithPostInfo, fail, weights::Weight, BoundedVec};
+use frame_support::{dispatch::DispatchResultWithPostInfo, fail, weights::Weight};
 use up_data_structs::{
-	CollectionId, TokenId, CustomDataLimit, CreateItemExData, CreateRefungibleExData,
-	budget::Budget, Property, PropertyKey, PropertyKeyPermission,
+	CollectionId, TokenId, CreateItemExData, CreateRefungibleExData, budget::Budget, Property,
+	PropertyKey, PropertyKeyPermission,
 };
 use pallet_common::{CommonCollectionOperations, CommonWeightInfo, with_weight};
 use sp_runtime::DispatchError;
@@ -110,10 +110,6 @@
 
 	fn burn_from() -> Weight {
 		<SelfWeightOf<T>>::burn_from()
-	}
-
-	fn set_variable_metadata(bytes: u32) -> Weight {
-		<SelfWeightOf<T>>::set_variable_metadata(bytes)
 	}
 }
 
@@ -124,7 +120,6 @@
 	match data {
 		up_data_structs::CreateItemData::ReFungible(data) => Ok(CreateRefungibleExData {
 			const_data: data.const_data,
-			variable_data: data.variable_data,
 			users: {
 				let mut out = BTreeMap::new();
 				out.insert(to.clone(), data.pieces);
@@ -306,19 +301,6 @@
 		fail!(<Error<T>>::SettingPropertiesNotAllowed)
 	}
 
-	fn set_variable_metadata(
-		&self,
-		sender: T::CrossAccountId,
-		token: TokenId,
-		data: BoundedVec<u8, CustomDataLimit>,
-	) -> DispatchResultWithPostInfo {
-		let len = data.len();
-		with_weight(
-			<Pallet<T>>::set_variable_metadata(self, &sender, token, data),
-			<CommonWeights<T>>::set_variable_metadata(len as u32),
-		)
-	}
-
 	fn check_nesting(
 		&self,
 		_sender: <T>::CrossAccountId,
@@ -357,13 +339,12 @@
 			.const_data
 			.into_inner()
 	}
-	fn variable_metadata(&self, token: TokenId) -> Vec<u8> {
-		<TokenData<T>>::get((self.id, token))
-			.variable_data
-			.into_inner()
-	}
 
-	fn token_properties(&self, _token_id: TokenId, _keys: Vec<PropertyKey>) -> Vec<Property> {
+	fn token_properties(
+		&self,
+		_token_id: TokenId,
+		_keys: Option<Vec<PropertyKey>>,
+	) -> Vec<Property> {
 		Vec::new()
 	}
 

--- a/pallets/refungible/src/lib.rs
+++ b/pallets/refungible/src/lib.rs
@@ -41,16 +41,23 @@
 pub mod weights;
 pub(crate) type SelfWeightOf<T> = <T as Config>::WeightInfo;
 
+#[struct_versioning::versioned(version = 2, upper)]
 #[derive(Encode, Decode, Default, TypeInfo, MaxEncodedLen)]
 pub struct ItemData {
 	pub const_data: BoundedVec<u8, CustomDataLimit>,
+
+	#[version(..2)]
 	pub variable_data: BoundedVec<u8, CustomDataLimit>,
 }
 
 #[frame_support::pallet]
 pub mod pallet {
 	use super::*;
-	use frame_support::{Blake2_128, Blake2_128Concat, Twox64Concat, pallet_prelude::*, storage::Key};
+	use frame_support::{
+		Blake2_128, Blake2_128Concat, Twox64Concat, pallet_prelude::*, storage::Key,
+		traits::StorageVersion,
+	};
+	use frame_system::pallet_prelude::*;
 	use up_data_structs::{CollectionId, TokenId};
 	use super::weights::WeightInfo;
 
@@ -73,7 +80,10 @@
 		type WeightInfo: WeightInfo;
 	}
 
+	const STORAGE_VERSION: StorageVersion = StorageVersion::new(1);
+
 	#[pallet::pallet]
+	#[pallet::storage_version(STORAGE_VERSION)]
 	#[pallet::generate_store(pub(super) trait Store)]
 	pub struct Pallet<T>(_);
 
@@ -146,6 +156,19 @@
 		Value = u128,
 		QueryKind = ValueQuery,
 	>;
+
+	#[pallet::hooks]
+	impl<T: Config> Hooks<BlockNumberFor<T>> for Pallet<T> {
+		fn on_runtime_upgrade() -> Weight {
+			if StorageVersion::get::<Pallet<T>>() < StorageVersion::new(1) {
+				<TokenData<T>>::translate_values::<ItemDataVersion1, _>(|v| {
+					Some(<ItemDataVersion2>::from(v))
+				})
+			}
+
+			0
+		}
+	}
 }
 
 pub struct RefungibleHandle<T: Config>(pallet_common::CollectionHandle<T>);
@@ -494,7 +517,6 @@
 				(collection.id, token_id),
 				ItemData {
 					const_data: token.const_data,
-					variable_data: token.variable_data,
 				},
 			);
 			for (user, amount) in token.users.into_iter() {
@@ -643,31 +665,6 @@
 		if let Some(allowance) = allowance {
 			Self::set_allowance_unchecked(collection, from, spender, token, allowance);
 		}
-		Ok(())
-	}
-
-	pub fn set_variable_metadata(
-		collection: &RefungibleHandle<T>,
-		sender: &T::CrossAccountId,
-		token: TokenId,
-		data: BoundedVec<u8, CustomDataLimit>,
-	) -> DispatchResult {
-		collection.check_can_update_meta(
-			sender,
-			&T::CrossAccountId::from_sub(collection.owner.clone()),
-		)?;
-
-		let token_data = <TokenData<T>>::get((collection.id, token));
-
-		// =========
-
-		<TokenData<T>>::insert(
-			(collection.id, token),
-			ItemData {
-				variable_data: data,
-				..token_data
-			},
-		);
 		Ok(())
 	}
 

--- a/pallets/refungible/src/weights.rs
+++ b/pallets/refungible/src/weights.rs
@@ -53,7 +53,6 @@
 	fn transfer_from_removing() -> Weight;
 	fn transfer_from_creating_removing() -> Weight;
 	fn burn_from() -> Weight;
-	fn set_variable_metadata(b: u32, ) -> Weight;
 }
 
 /// Weights for pallet_refungible using the Substrate node and recommended hardware.
@@ -242,12 +241,6 @@
 		(42_043_000 as Weight)
 			.saturating_add(T::DbWeight::get().reads(5 as Weight))
 			.saturating_add(T::DbWeight::get().writes(7 as Weight))
-	}
-	// Storage: Refungible TokenData (r:1 w:1)
-	fn set_variable_metadata(_b: u32, ) -> Weight {
-		(7_364_000 as Weight)
-			.saturating_add(T::DbWeight::get().reads(1 as Weight))
-			.saturating_add(T::DbWeight::get().writes(1 as Weight))
 	}
 }
 
@@ -436,11 +429,5 @@
 		(42_043_000 as Weight)
 			.saturating_add(RocksDbWeight::get().reads(5 as Weight))
 			.saturating_add(RocksDbWeight::get().writes(7 as Weight))
-	}
-	// Storage: Refungible TokenData (r:1 w:1)
-	fn set_variable_metadata(_b: u32, ) -> Weight {
-		(7_364_000 as Weight)
-			.saturating_add(RocksDbWeight::get().reads(1 as Weight))
-			.saturating_add(RocksDbWeight::get().writes(1 as Weight))
 	}
 }

--- a/pallets/unique/src/benchmarking.rs
+++ b/pallets/unique/src/benchmarking.rs
@@ -168,9 +168,4 @@
 			nesting_rule: None,
 		};
 	}: set_collection_limits(RawOrigin::Signed(caller.clone()), collection, cl)
-
-	set_meta_update_permission_flag {
-		let caller: T::AccountId = account("caller", 0, SEED);
-		let collection = create_nft_collection::<T>(caller.clone())?;
-	}: _(RawOrigin::Signed(caller.clone()), collection, MetaUpdatePermission::Admin)
 }

--- a/pallets/unique/src/lib.rs
+++ b/pallets/unique/src/lib.rs
@@ -35,16 +35,16 @@
 use frame_system::{self as system, ensure_signed};
 use sp_runtime::{sp_std::prelude::Vec};
 use up_data_structs::{
-	CONST_ON_CHAIN_SCHEMA_LIMIT, OFFCHAIN_SCHEMA_LIMIT,
-	MAX_COLLECTION_NAME_LENGTH, MAX_COLLECTION_DESCRIPTION_LENGTH, MAX_TOKEN_PREFIX_LENGTH,
-	AccessMode, CreateItemData, CollectionLimits, CollectionId, CollectionMode, TokenId,
-	SchemaVersion, SponsorshipState, MetaUpdatePermission, CreateCollectionData, CustomDataLimit,
-	CreateItemExData, budget, CollectionField, Property, PropertyKey, PropertyKeyPermission,
+	CONST_ON_CHAIN_SCHEMA_LIMIT, OFFCHAIN_SCHEMA_LIMIT, MAX_COLLECTION_NAME_LENGTH,
+	MAX_COLLECTION_DESCRIPTION_LENGTH, MAX_TOKEN_PREFIX_LENGTH, AccessMode, CreateItemData,
+	CollectionLimits, CollectionId, CollectionMode, TokenId, SchemaVersion, SponsorshipState,
+	CreateCollectionData, CreateItemExData, budget, CollectionField, Property, PropertyKey,
+	PropertyKeyPermission,
 };
 use pallet_evm::account::CrossAccountId;
 use pallet_common::{
-	CollectionHandle, Pallet as PalletCommon, Error as CommonError, CommonWeightInfo,
-	dispatch::dispatch_call, dispatch::CollectionDispatch,
+	CollectionHandle, Pallet as PalletCommon, CommonWeightInfo, dispatch::dispatch_call,
+	dispatch::CollectionDispatch,
 };
 
 #[cfg(feature = "runtime-benchmarks")]
@@ -240,7 +240,9 @@
 
 		/// Variable metadata sponsoring
 		/// Collection id (controlled?2), token id (controlled?2)
+		#[deprecated]
 		pub VariableMetaDataBasket get(fn variable_meta_data_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => Option<T::BlockNumber>;
+
 		/// Approval sponsoring
 		pub NftApproveBasket get(fn nft_approve_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(blake2_128_concat) TokenId => Option<T::BlockNumber>;
 		pub FungibleApproveBasket get(fn fungible_approve_basket): double_map hasher(blake2_128_concat) CollectionId, hasher(twox_64_concat) T::AccountId => Option<T::BlockNumber>;
@@ -261,6 +263,14 @@
 			0
 		}
 
+		fn on_runtime_upgrade() -> Weight {
+			let limit = None;
+
+			<VariableMetaDataBasket<T>>::remove_all(limit);
+
+			0
+		}
+
 		/// 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 of the collection is set to the address that signed the transaction and can be changed later.
 		///
 		/// # Permissions
@@ -333,7 +343,6 @@
 			<FungibleTransferBasket<T>>::remove_prefix(collection_id, None);
 			<ReFungibleTransferBasket<T>>::remove_prefix((collection_id,), None);
 
-			<VariableMetaDataBasket<T>>::remove_prefix(collection_id, None);
 			<NftApproveBasket<T>>::remove_prefix(collection_id, None);
 			<FungibleApproveBasket<T>>::remove_prefix(collection_id, None);
 			<RefungibleApproveBasket<T>>::remove_prefix((collection_id,), None);
@@ -929,59 +938,6 @@
 			let budget = budget::Value::new(2);
 
 			dispatch_call::<T, _>(collection_id, |d| d.transfer_from(sender, from, recipient, item_id, value, &budget))
-		}
-
-		/// Set off-chain data schema.
-		///
-		/// # Permissions
-		///
-		/// * Collection Owner
-		/// * Collection Admin
-		///
-		/// # Arguments
-		///
-		/// * collection_id.
-		///
-		/// * schema: String representing the offchain data schema.
-		#[weight = T::CommonWeightInfo::set_variable_metadata(data.len() as u32)]
-		#[transactional]
-		pub fn set_variable_meta_data (
-			origin,
-			collection_id: CollectionId,
-			item_id: TokenId,
-			data: BoundedVec<u8, CustomDataLimit>,
-		) -> DispatchResultWithPostInfo {
-			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);
-
-			dispatch_call::<T, _>(collection_id, |d| d.set_variable_metadata(sender, item_id, data))
-		}
-
-		/// Set meta_update_permission value for particular collection
-		///
-		/// # Permissions
-		///
-		/// * Collection Owner.
-		///
-		/// # Arguments
-		///
-		/// * collection_id: ID of the collection.
-		///
-		/// * value: New flag value.
-		#[weight = <SelfWeightOf<T>>::set_meta_update_permission_flag()]
-		#[transactional]
-		pub fn set_meta_update_permission_flag(origin, collection_id: CollectionId, value: MetaUpdatePermission) -> DispatchResult {
-			let sender = T::CrossAccountId::from_sub(ensure_signed(origin)?);
-			let mut target_collection = <CollectionHandle<T>>::try_get(collection_id)?;
-
-			ensure!(
-				target_collection.meta_update_permission != MetaUpdatePermission::None,
-				<CommonError<T>>::MetadataFlagFrozen,
-			);
-			target_collection.check_is_owner(&sender)?;
-
-			target_collection.meta_update_permission = value;
-
-			target_collection.save()
 		}
 
 		/// Set schema standard

--- a/pallets/unique/src/weights.rs
+++ b/pallets/unique/src/weights.rs
@@ -49,7 +49,6 @@
 	fn set_const_on_chain_schema(b: u32, ) -> Weight;
 	fn set_schema_version() -> Weight;
 	fn set_collection_limits() -> Weight;
-	fn set_meta_update_permission_flag() -> Weight;
 }
 
 /// Weights for pallet_unique using the Substrate node and recommended hardware.
@@ -167,12 +166,6 @@
 	// Storage: Common CollectionById (r:1 w:1)
 	fn set_collection_limits() -> Weight {
 		(15_339_000 as Weight)
-			.saturating_add(T::DbWeight::get().reads(1 as Weight))
-			.saturating_add(T::DbWeight::get().writes(1 as Weight))
-	}
-	// Storage: Common CollectionById (r:1 w:1)
-	fn set_meta_update_permission_flag() -> Weight {
-		(7_214_000 as Weight)
 			.saturating_add(T::DbWeight::get().reads(1 as Weight))
 			.saturating_add(T::DbWeight::get().writes(1 as Weight))
 	}
@@ -292,12 +285,6 @@
 	// Storage: Common CollectionById (r:1 w:1)
 	fn set_collection_limits() -> Weight {
 		(15_339_000 as Weight)
-			.saturating_add(RocksDbWeight::get().reads(1 as Weight))
-			.saturating_add(RocksDbWeight::get().writes(1 as Weight))
-	}
-	// Storage: Common CollectionById (r:1 w:1)
-	fn set_meta_update_permission_flag() -> Weight {
-		(7_214_000 as Weight)
 			.saturating_add(RocksDbWeight::get().reads(1 as Weight))
 			.saturating_add(RocksDbWeight::get().writes(1 as Weight))
 	}

--- a/primitives/data-structs/src/lib.rs
+++ b/primitives/data-structs/src/lib.rs
@@ -22,7 +22,8 @@
 };
 use frame_support::{
 	storage::{bounded_btree_map::BoundedBTreeMap, bounded_btree_set::BoundedBTreeSet},
-	traits::Get, parameter_types,
+	traits::Get,
+	parameter_types,
 };
 
 #[cfg(feature = "serde")]
@@ -40,7 +41,10 @@
 	CollectionInfo, NftInfo, ResourceInfo, PropertyInfo, BaseInfo, PartType, Theme, ThemeProperty,
 };
 pub use rmrk_types::{
-	primitives::{CollectionId as RmrkCollectionId, NftId as RmrkNftId, BaseId as RmrkBaseId, PartId as RmrkPartId, ResourceId as RmrkResourceId},
+	primitives::{
+		CollectionId as RmrkCollectionId, NftId as RmrkNftId, BaseId as RmrkBaseId,
+		PartId as RmrkPartId, ResourceId as RmrkResourceId,
+	},
 	NftChild as RmrkNftChild, AccountIdOrCollectionNftTuple as RmrkAccountIdOrCollectionNftTuple,
 };
 
@@ -85,6 +89,7 @@
 
 // Schema limits
 pub const OFFCHAIN_SCHEMA_LIMIT: u32 = 8192;
+pub const VARIABLE_ON_CHAIN_SCHEMA_LIMIT: u32 = 8192;
 pub const CONST_ON_CHAIN_SCHEMA_LIMIT: u32 = 32768;
 
 pub const COLLECTION_FIELD_LIMIT: u32 = CONST_ON_CHAIN_SCHEMA_LIMIT;
@@ -318,8 +323,12 @@
 	pub limits: CollectionLimitsVersion2,
 
 	#[version(..2)]
+	pub variable_on_chain_schema: BoundedVec<u8, ConstU32<VARIABLE_ON_CHAIN_SCHEMA_LIMIT>>,
+
+	#[version(..2)]
 	pub const_on_chain_schema: BoundedVec<u8, ConstU32<CONST_ON_CHAIN_SCHEMA_LIMIT>>,
 
+	#[version(..2)]
 	pub meta_update_permission: MetaUpdatePermission,
 }
 
@@ -339,7 +348,6 @@
 	pub sponsorship: SponsorshipState<AccountId>,
 	pub limits: CollectionLimits,
 	pub const_on_chain_schema: Vec<u8>,
-	pub meta_update_permission: MetaUpdatePermission,
 	pub token_property_permissions: Vec<PropertyKeyPermission>,
 	pub properties: Vec<Property>,
 }
@@ -365,7 +373,6 @@
 	pub pending_sponsor: Option<AccountId>,
 	pub limits: Option<CollectionLimits>,
 	pub const_on_chain_schema: BoundedVec<u8, ConstU32<CONST_ON_CHAIN_SCHEMA_LIMIT>>,
-	pub meta_update_permission: Option<MetaUpdatePermission>,
 	pub token_property_permissions: CollectionPropertiesPermissionsVec,
 	pub properties: CollectionPropertiesVec,
 }
@@ -376,28 +383,6 @@
 pub type CollectionPropertiesVec =
 	BoundedVec<Property, ConstU32<MAX_COLLECTION_PROPERTIES_ENCODE_LEN>>;
 
-#[derive(Encode, Decode, Debug, Clone, PartialEq, TypeInfo)]
-#[cfg_attr(feature = "serde1", derive(Serialize, Deserialize))]
-pub struct NftItemType<AccountId> {
-	pub owner: AccountId,
-	pub const_data: Vec<u8>,
-	pub variable_data: Vec<u8>,
-}
-
-#[derive(Encode, Decode, Default, Debug, Clone, PartialEq, TypeInfo)]
-#[cfg_attr(feature = "serde1", derive(Serialize, Deserialize))]
-pub struct FungibleItemType {
-	pub value: u128,
-}
-
-#[derive(Encode, Decode, Debug, Clone, PartialEq, TypeInfo)]
-#[cfg_attr(feature = "serde1", derive(Serialize, Deserialize))]
-pub struct ReFungibleItemType<AccountId> {
-	pub owner: Vec<Ownership<AccountId>>,
-	pub const_data: Vec<u8>,
-	pub variable_data: Vec<u8>,
-}
-
 /// All fields are wrapped in `Option`s, where None means chain default
 #[struct_versioning::versioned(version = 2, upper)]
 #[derive(Encode, Decode, Debug, Default, Clone, PartialEq, TypeInfo, MaxEncodedLen)]
@@ -405,6 +390,8 @@
 pub struct CollectionLimits {
 	pub account_token_ownership_limit: Option<u32>,
 	pub sponsored_data_size: Option<u32>,
+
+	/// FIXME should we delete this or repurpose it?
 	/// None - setVariableMetadata is not sponsored
 	/// Some(v) - setVariableMetadata is sponsored
 	///           if there is v block between txs
@@ -502,9 +489,6 @@
 	#[cfg_attr(feature = "serde1", serde(with = "bounded::vec_serde"))]
 	#[derivative(Debug(format_with = "bounded::vec_debug"))]
 	pub const_data: BoundedVec<u8, CustomDataLimit>,
-	#[cfg_attr(feature = "serde1", serde(with = "bounded::vec_serde"))]
-	#[derivative(Debug(format_with = "bounded::vec_debug"))]
-	pub variable_data: BoundedVec<u8, CustomDataLimit>,
 
 	#[cfg_attr(feature = "serde1", serde(with = "bounded::vec_serde"))]
 	#[derivative(Debug(format_with = "bounded::vec_debug"))]
@@ -524,26 +508,16 @@
 	#[cfg_attr(feature = "serde1", serde(with = "bounded::vec_serde"))]
 	#[derivative(Debug(format_with = "bounded::vec_debug"))]
 	pub const_data: BoundedVec<u8, CustomDataLimit>,
-	#[cfg_attr(feature = "serde1", serde(with = "bounded::vec_serde"))]
-	#[derivative(Debug(format_with = "bounded::vec_debug"))]
-	pub variable_data: BoundedVec<u8, CustomDataLimit>,
 	pub pieces: u128,
 }
 
 #[derive(Encode, Decode, Debug, Clone, PartialEq, TypeInfo, MaxEncodedLen)]
-#[cfg_attr(feature = "std", derive(Serialize, Deserialize))]
 pub enum MetaUpdatePermission {
 	ItemOwner,
 	Admin,
 	None,
 }
 
-impl Default for MetaUpdatePermission {
-	fn default() -> Self {
-		Self::ItemOwner
-	}
-}
-
 #[derive(Encode, Decode, MaxEncodedLen, PartialEq, Clone, Debug, TypeInfo)]
 #[cfg_attr(feature = "serde1", derive(Serialize, Deserialize))]
 pub enum CreateItemData {
@@ -557,8 +531,6 @@
 pub struct CreateNftExData<CrossAccountId> {
 	#[derivative(Debug(format_with = "bounded::vec_debug"))]
 	pub const_data: BoundedVec<u8, CustomDataLimit>,
-	#[derivative(Debug(format_with = "bounded::vec_debug"))]
-	pub variable_data: BoundedVec<u8, CustomDataLimit>,
 	#[derivative(Debug(format_with = "bounded::vec_debug"))]
 	pub properties: CollectionPropertiesVec,
 	pub owner: CrossAccountId,
@@ -569,8 +541,6 @@
 pub struct CreateRefungibleExData<CrossAccountId> {
 	#[derivative(Debug(format_with = "bounded::vec_debug"))]
 	pub const_data: BoundedVec<u8, CustomDataLimit>,
-	#[derivative(Debug(format_with = "bounded::vec_debug"))]
-	pub variable_data: BoundedVec<u8, CustomDataLimit>,
 	#[derivative(Debug(format_with = "bounded::map_debug"))]
 	pub users: BoundedBTreeMap<CrossAccountId, u128, ConstU32<MAX_ITEMS_PER_BATCH>>,
 }
@@ -598,8 +568,8 @@
 impl CreateItemData {
 	pub fn data_size(&self) -> usize {
 		match self {
-			CreateItemData::NFT(data) => data.variable_data.len() + data.const_data.len(),
-			CreateItemData::ReFungible(data) => data.variable_data.len() + data.const_data.len(),
+			CreateItemData::NFT(data) => data.const_data.len(),
+			CreateItemData::ReFungible(data) => data.const_data.len(),
 			_ => 0,
 		}
 	}
@@ -700,24 +670,65 @@
 	NoSpaceForProperty,
 	PropertyLimitReached,
 	InvalidCharacterInPropertyKey,
+	PropertyKeyIsTooLong,
 	EmptyPropertyKey,
 }
 
-pub trait TrySet: Sized {
+#[derive(Clone, Copy)]
+pub enum PropertyScope {
+	None,
+	Rmrk,
+}
+
+impl PropertyScope {
+	fn apply(self, key: PropertyKey) -> Result<PropertyKey, PropertiesError> {
+		let scope_str: &[u8] = match self {
+			Self::None => return Ok(key),
+			Self::Rmrk => b"rmrk",
+		};
+
+		[scope_str, b":", key.as_slice()]
+			.concat()
+			.try_into()
+			.map_err(|_| PropertiesError::PropertyKeyIsTooLong)
+	}
+}
+
+pub trait TrySetProperty: Sized {
 	type Value;
 
-	fn try_set(&mut self, key: PropertyKey, value: Self::Value) -> Result<(), PropertiesError>;
+	fn try_scoped_set(
+		&mut self,
+		scope: PropertyScope,
+		key: PropertyKey,
+		value: Self::Value,
+	) -> Result<(), PropertiesError>;
 
-	fn try_set_from_iter<I>(&mut self, iter: I) -> Result<(), PropertiesError>
+	fn try_scoped_set_from_iter<I>(
+		&mut self,
+		scope: PropertyScope,
+		iter: I,
+	) -> Result<(), PropertiesError>
 	where
 		I: Iterator<Item = (PropertyKey, Self::Value)>,
 	{
 		for (key, value) in iter {
-			self.try_set(key, value)?;
+			self.try_scoped_set(scope, key, value)?;
 		}
 
 		Ok(())
 	}
+
+	fn try_set(&mut self, key: PropertyKey, value: Self::Value) -> Result<(), PropertiesError> {
+		self.try_scoped_set(PropertyScope::None, key, value)
+	}
+
+	fn try_set_from_iter<I>(&mut self, iter: I) -> Result<(), PropertiesError>
+	where
+		I: Iterator<Item = (PropertyKey, Self::Value)>,
+	{
+		self.try_scoped_set_from_iter(PropertyScope::None, iter)
+	}
 }
 
 #[derive(Encode, Decode, TypeInfo, Derivative, Clone, PartialEq, MaxEncodedLen)]
@@ -751,12 +762,10 @@
 		}
 
 		for byte in key.as_slice().iter() {
-			match char::from_u32(*byte as u32) {
-				Some(ch)
-					if ch.is_ascii_alphanumeric()
-					|| ch == '_'
-					|| ch == '-' => { /* OK */ },
-				_ => return Err(PropertiesError::InvalidCharacterInPropertyKey)
+			let byte = *byte;
+
+			if !byte.is_ascii_alphanumeric() && byte != b'_' && byte != b'-' {
+				return Err(PropertiesError::InvalidCharacterInPropertyKey);
 			}
 		}
 
@@ -764,12 +773,18 @@
 	}
 }
 
-impl<Value> TrySet for PropertiesMap<Value> {
+impl<Value> TrySetProperty for PropertiesMap<Value> {
 	type Value = Value;
 
-	fn try_set(&mut self, key: PropertyKey, value: Self::Value) -> Result<(), PropertiesError> {
+	fn try_scoped_set(
+		&mut self,
+		scope: PropertyScope,
+		key: PropertyKey,
+		value: Self::Value,
+	) -> Result<(), PropertiesError> {
 		Self::check_property_key(&key)?;
 
+		let key = scope.apply(key)?;
 		self.0
 			.try_insert(key, value)
 			.map_err(|_| PropertiesError::PropertyLimitReached)?;
@@ -816,17 +831,22 @@
 	}
 }
 
-impl TrySet for Properties {
+impl TrySetProperty for Properties {
 	type Value = PropertyValue;
 
-	fn try_set(&mut self, key: PropertyKey, value: Self::Value) -> Result<(), PropertiesError> {
+	fn try_scoped_set(
+		&mut self,
+		scope: PropertyScope,
+		key: PropertyKey,
+		value: Self::Value,
+	) -> Result<(), PropertiesError> {
 		let value_len = value.len();
 
 		if self.consumed_space as usize + value_len > self.space_limit as usize {
 			return Err(PropertiesError::NoSpaceForProperty);
 		}
 
-		self.map.try_set(key, value)?;
+		self.map.try_scoped_set(scope, key, value)?;
 
 		self.consumed_space += value_len as u32;
 
@@ -869,34 +889,23 @@
 	pub const RmrkPartsLimit: u32 = 3;
 }
 
-pub type RmrkCollectionInfo<AccountId> = CollectionInfo<
-	RmrkString,
-	BoundedVec<u8, RmrkCollectionSymbolLimit>,
-	AccountId
->;
-pub type RmrkInstanceInfo<AccountId> = NftInfo<
-	AccountId, 
-	Permill,
-	RmrkString
->;
-pub type RmrkResourceInfo = ResourceInfo::<
+pub type RmrkCollectionInfo<AccountId> =
+	CollectionInfo<RmrkString, BoundedVec<u8, RmrkCollectionSymbolLimit>, AccountId>;
+pub type RmrkInstanceInfo<AccountId> = NftInfo<AccountId, Permill, RmrkString>;
+pub type RmrkResourceInfo = ResourceInfo<
 	BoundedVec<u8, RmrkResourceSymbolLimit>,
 	RmrkString,
-	BoundedVec<RmrkPartId, RmrkPartsLimit>
->;
-pub type RmrkPropertyInfo = PropertyInfo<
-	BoundedVec<u8, RmrkKeyLimit>, 
-	BoundedVec<u8, RmrkValueLimit>
+	BoundedVec<RmrkPartId, RmrkPartsLimit>,
 >;
+pub type RmrkPropertyInfo =
+	PropertyInfo<BoundedVec<u8, RmrkKeyLimit>, BoundedVec<u8, RmrkValueLimit>>;
 pub type RmrkBaseInfo<AccountId> = BaseInfo<AccountId, RmrkString>;
-pub type RmrkPartType = PartType<
-	RmrkString,
-	BoundedVec<RmrkCollectionId, RmrkMaxCollectionsEquippablePerPart>
->;
+pub type RmrkPartType =
+	PartType<RmrkString, BoundedVec<RmrkCollectionId, RmrkMaxCollectionsEquippablePerPart>>;
 pub type RmrkTheme = Theme<RmrkString, Vec<ThemeProperty<RmrkString>>>;
 
 pub type RmrkRpcString = Vec<u8>;
 pub type RmrkThemeName = RmrkRpcString;
 pub type RmrkPropertyKey = RmrkRpcString;
 
-type RmrkString = BoundedVec<u8, RmrkStringLimit>;
\ No newline at end of file
+type RmrkString = BoundedVec<u8, RmrkStringLimit>;

--- a/primitives/rpc/src/lib.rs
+++ b/primitives/rpc/src/lib.rs
@@ -42,22 +42,25 @@
 		fn token_owner(collection: CollectionId, token: TokenId) -> Result<Option<CrossAccountId>>;
 		fn topmost_token_owner(collection: CollectionId, token: TokenId) -> Result<Option<CrossAccountId>>;
 		fn const_metadata(collection: CollectionId, token: TokenId) -> Result<Vec<u8>>;
-		fn variable_metadata(collection: CollectionId, token: TokenId) -> Result<Vec<u8>>;
 
-		fn collection_properties(collection: CollectionId, properties: Vec<Vec<u8>>) -> Result<Vec<Property>>;
+		fn collection_properties(collection: CollectionId, properties: Option<Vec<Vec<u8>>>) -> Result<Vec<Property>>;
 
 		fn token_properties(
 			collection: CollectionId,
 			token_id: TokenId,
-			properties: Vec<Vec<u8>>
+			properties: Option<Vec<Vec<u8>>>
 		) -> Result<Vec<Property>>;
 
 		fn property_permissions(
 			collection: CollectionId,
-			properties: Vec<Vec<u8>>
+			properties: Option<Vec<Vec<u8>>>
 		) -> Result<Vec<PropertyKeyPermission>>;
 
-		fn token_data(collection: CollectionId, token_id: TokenId, keys: Vec<Vec<u8>>) -> Result<TokenData<CrossAccountId>>;
+		fn token_data(
+			collection: CollectionId,
+			token_id: TokenId,
+			keys: Option<Vec<Vec<u8>>>
+		) -> Result<TokenData<CrossAccountId>>;
 
 		fn total_supply(collection: CollectionId) -> Result<u32>;
 		fn account_balance(collection: CollectionId, account: CrossAccountId) -> Result<u32>;

--- a/runtime/common/src/runtime_apis.rs
+++ b/runtime/common/src/runtime_apis.rs
@@ -32,15 +32,14 @@
                 fn const_metadata(collection: CollectionId, token: TokenId) -> Result<Vec<u8>, DispatchError> {
                     dispatch_unique_runtime!(collection.const_metadata(token))
                 }
-                fn variable_metadata(collection: CollectionId, token: TokenId) -> Result<Vec<u8>, DispatchError> {
-                    dispatch_unique_runtime!(collection.variable_metadata(token))
-                }
 
                 fn collection_properties(
                     collection: CollectionId,
-                    keys: Vec<Vec<u8>>
+                    keys: Option<Vec<Vec<u8>>>
                 ) -> Result<Vec<Property>, DispatchError> {
-                    let keys = pallet_common::Pallet::<Runtime>::bytes_keys_to_property_keys(keys)?;
+                    let keys = keys.map(
+                        |keys| pallet_common::Pallet::<Runtime>::bytes_keys_to_property_keys(keys)
+                    ).transpose()?;
 
                     pallet_common::Pallet::<Runtime>::filter_collection_properties(collection, keys)
                 }
@@ -48,17 +47,22 @@
                 fn token_properties(
                     collection: CollectionId,
                     token_id: TokenId,
-                    keys: Vec<Vec<u8>>
+                    keys: Option<Vec<Vec<u8>>>
                 ) -> Result<Vec<Property>, DispatchError> {
-                    let keys = pallet_common::Pallet::<Runtime>::bytes_keys_to_property_keys(keys)?;
+                    let keys = keys.map(
+                        |keys| pallet_common::Pallet::<Runtime>::bytes_keys_to_property_keys(keys)
+                    ).transpose()?;
+
                     dispatch_unique_runtime!(collection.token_properties(token_id, keys))
                 }
 
                 fn property_permissions(
                     collection: CollectionId,
-                    keys: Vec<Vec<u8>>
+                    keys: Option<Vec<Vec<u8>>>
                 ) -> Result<Vec<PropertyKeyPermission>, DispatchError> {
-                    let keys = pallet_common::Pallet::<Runtime>::bytes_keys_to_property_keys(keys)?;
+                    let keys = keys.map(
+                        |keys| pallet_common::Pallet::<Runtime>::bytes_keys_to_property_keys(keys)
+                    ).transpose()?;
 
                     pallet_common::Pallet::<Runtime>::filter_property_permissions(collection, keys)
                 }
@@ -66,7 +70,7 @@
                 fn token_data(
                     collection: CollectionId,
                     token_id: TokenId,
-                    keys: Vec<Vec<u8>>
+                    keys: Option<Vec<Vec<u8>>>
                 ) -> Result<TokenData<CrossAccountId>, DispatchError> {
                     let token_data = TokenData {
                         const_data: Self::const_metadata(collection, token_id)?,
@@ -232,7 +236,7 @@
                                     })
                                 })
                                 .collect();
-        
+
                             properties
                         }
                         None => {
@@ -253,7 +257,7 @@
                     let token_id = TokenId(nft_id);
 
 		            let properties = pallet_nonfungible::Pallet::<Runtime>::token_properties((collection_id, token_id)); // todo look into usage of nonfungible
-                    
+
                     return Ok(match filter_keys {
                         Some(keys) => {
                             let keys = pallet_common::Pallet::<Runtime>::bytes_keys_to_property_keys(keys)?;
@@ -266,7 +270,7 @@
                                     })
                                 })
                                 .collect();
-        
+
                             properties
                         }
                         None => {
@@ -300,7 +304,7 @@
                     let keys = pallet_common::Pallet::<Runtime>::bytes_keys_to_property_keys(
                         Vec::from([String::from("rmrk:base-type").into_bytes()])
                     )?;
-                    let properties = pallet_common::Pallet::<Runtime>::filter_collection_properties(collection_id, keys)?;
+                    let properties = pallet_common::Pallet::<Runtime>::filter_collection_properties(collection_id, Some(keys))?;
                     //ensure!(properties.len() == 1); // todo make sure it's fine to have ensure in place // no access to errors from here? displace?
 
                     Ok(Some( RmrkBaseInfo {

--- a/runtime/common/src/sponsoring.rs
+++ b/runtime/common/src/sponsoring.rs
@@ -21,17 +21,16 @@
 	storage::{StorageMap, StorageDoubleMap, StorageNMap},
 };
 use up_data_structs::{
-	CollectionId, FUNGIBLE_SPONSOR_TRANSFER_TIMEOUT, MetaUpdatePermission,
-	NFT_SPONSOR_TRANSFER_TIMEOUT, REFUNGIBLE_SPONSOR_TRANSFER_TIMEOUT, TokenId, CollectionMode,
-	CreateItemData,
+	CollectionId, FUNGIBLE_SPONSOR_TRANSFER_TIMEOUT, NFT_SPONSOR_TRANSFER_TIMEOUT,
+	REFUNGIBLE_SPONSOR_TRANSFER_TIMEOUT, TokenId, CollectionMode, CreateItemData,
 };
 use sp_runtime::traits::Saturating;
 use pallet_common::{CollectionHandle};
 use pallet_evm::account::CrossAccountId;
 use pallet_unique::{
 	Call as UniqueCall, Config as UniqueConfig, FungibleApproveBasket, RefungibleApproveBasket,
-	NftApproveBasket, VariableMetaDataBasket, CreateItemBasket, ReFungibleTransferBasket,
-	FungibleTransferBasket, NftTransferBasket,
+	NftApproveBasket, CreateItemBasket, ReFungibleTransferBasket, FungibleTransferBasket,
+	NftTransferBasket,
 };
 use pallet_fungible::Config as FungibleConfig;
 use pallet_nonfungible::Config as NonfungibleConfig;
@@ -136,63 +135,6 @@
 	}
 
 	CreateItemBasket::<T>::insert((collection.id, who.as_sub()), block_number);
-
-	Some(())
-}
-
-pub fn withdraw_set_variable_meta_data<T: Config>(
-	who: &T::CrossAccountId,
-	collection: &CollectionHandle<T>,
-	item_id: &TokenId,
-	data: &[u8],
-) -> Option<()> {
-	// TODO: make it work for admins
-	if collection.meta_update_permission != MetaUpdatePermission::ItemOwner {
-		return None;
-	}
-	// preliminary sponsoring correctness check
-	match collection.mode {
-		CollectionMode::NFT => {
-			let owner = pallet_nonfungible::TokenData::<T>::get((collection.id, item_id))?.owner;
-			if !owner.conv_eq(who) {
-				return None;
-			}
-		}
-		CollectionMode::Fungible(_) => {
-			if item_id != &TokenId::default() {
-				return None;
-			}
-			if <pallet_fungible::Balance<T>>::get((collection.id, who)) == 0 {
-				return None;
-			}
-		}
-		CollectionMode::ReFungible => {
-			if !<pallet_refungible::Owned<T>>::get((collection.id, who, item_id)) {
-				return None;
-			}
-		}
-	}
-
-	// Can't sponsor fungible collection, this tx will be rejected
-	// as invalid
-	if matches!(collection.mode, CollectionMode::Fungible(_)) {
-		return None;
-	}
-	if data.len() > collection.limits.sponsored_data_size() as usize {
-		return None;
-	}
-
-	let block_number = <frame_system::Pallet<T>>::block_number() as T::BlockNumber;
-	let limit = collection.limits.sponsored_data_rate_limit()?;
-
-	if let Some(last_tx_block) = VariableMetaDataBasket::<T>::get(collection.id, item_id) {
-		let timeout = last_tx_block + limit.into();
-		if block_number < timeout {
-			return None;
-		}
-	}
-
-	<VariableMetaDataBasket<T>>::insert(collection.id, item_id, block_number);
 
 	Some(())
 }
@@ -290,20 +232,6 @@
 			} => {
 				let (sponsor, collection) = load(*collection_id)?;
 				withdraw_approve::<T>(&collection, who, item_id).map(|()| sponsor)
-			}
-			UniqueCall::set_variable_meta_data {
-				collection_id,
-				item_id,
-				data,
-			} => {
-				let (sponsor, collection) = load(*collection_id)?;
-				withdraw_set_variable_meta_data::<T>(
-					&T::CrossAccountId::from_sub(who.clone()),
-					&collection,
-					item_id,
-					data,
-				)
-				.map(|()| sponsor)
 			}
 			_ => None,
 		}

--- a/runtime/common/src/weights.rs
+++ b/runtime/common/src/weights.rs
@@ -86,10 +86,6 @@
 		dispatch_weight::<T>() + max_weight_of!(transfer_from())
 	}
 
-	fn set_variable_metadata(bytes: u32) -> Weight {
-		dispatch_weight::<T>() + max_weight_of!(set_variable_metadata(bytes))
-	}
-
 	fn burn_from() -> Weight {
 		dispatch_weight::<T>() + max_weight_of!(burn_from())
 	}

--- a/runtime/tests/src/tests.rs
+++ b/runtime/tests/src/tests.rs
@@ -18,9 +18,9 @@
 use crate::{Test, TestCrossAccountId, CollectionCreationPrice, Origin, Unique, new_test_ext};
 use up_data_structs::{
 	COLLECTION_NUMBER_LIMIT, CollectionId, CreateItemData, CreateFungibleData, CreateNftData,
-	CreateReFungibleData, MAX_DECIMAL_POINTS, COLLECTION_ADMINS_LIMIT, MetaUpdatePermission,
-	TokenId, MAX_TOKEN_OWNERSHIP, CreateCollectionData, CollectionField, SchemaVersion,
-	CollectionMode, AccessMode,
+	CreateReFungibleData, MAX_DECIMAL_POINTS, COLLECTION_ADMINS_LIMIT, TokenId,
+	MAX_TOKEN_OWNERSHIP, CreateCollectionData, CollectionField, SchemaVersion, CollectionMode,
+	AccessMode,
 };
 use frame_support::{assert_noop, assert_ok, assert_err};
 use sp_std::convert::TryInto;
@@ -47,7 +47,7 @@
 fn default_nft_data() -> CreateNftData {
 	CreateNftData {
 		const_data: vec![1, 2, 3].try_into().unwrap(),
-		variable_data: vec![3, 2, 1].try_into().unwrap(),
+		properties: vec![].try_into().unwrap(),
 	}
 }
 
@@ -58,7 +58,6 @@
 fn default_re_fungible_data() -> CreateReFungibleData {
 	CreateReFungibleData {
 		const_data: vec![1, 2, 3].try_into().unwrap(),
-		variable_data: vec![3, 2, 1].try_into().unwrap(),
 		pieces: 1023,
 	}
 }
@@ -215,7 +214,6 @@
 
 		let item = <pallet_nonfungible::TokenData<Test>>::get((collection_id, 1)).unwrap();
 		assert_eq!(item.const_data, data.const_data.into_inner());
-		assert_eq!(item.variable_data, data.variable_data.into_inner());
 	});
 }
 
@@ -247,7 +245,6 @@
 			))
 			.unwrap();
 			assert_eq!(item.const_data.to_vec(), data.const_data.into_inner());
-			assert_eq!(item.variable_data.to_vec(), data.variable_data.into_inner());
 		}
 	});
 }
@@ -263,7 +260,6 @@
 		let balance =
 			<pallet_refungible::Balance<Test>>::get((collection_id, TokenId(1), account(1)));
 		assert_eq!(item.const_data, data.const_data.into_inner());
-		assert_eq!(item.variable_data, data.variable_data.into_inner());
 		assert_eq!(balance, 1023);
 	});
 }
@@ -299,7 +295,6 @@
 			let balance =
 				<pallet_refungible::Balance<Test>>::get((CollectionId(1), TokenId(1), account(1)));
 			assert_eq!(item.const_data.to_vec(), data.const_data.into_inner());
-			assert_eq!(item.variable_data.to_vec(), data.variable_data.into_inner());
 			assert_eq!(balance, 1023);
 		}
 	});
@@ -413,7 +408,6 @@
 		create_test_item(collection_id, &data.clone().into());
 		let item = <pallet_refungible::TokenData<Test>>::get((collection_id, TokenId(1)));
 		assert_eq!(item.const_data, data.const_data.into_inner());
-		assert_eq!(item.variable_data, data.variable_data.into_inner());
 		assert_eq!(
 			<pallet_refungible::AccountBalance<Test>>::get((collection_id, account(1))),
 			1
@@ -2427,117 +2421,6 @@
 }
 
 #[test]
-fn set_variable_meta_data_on_nft_token_stores_variable_meta_data() {
-	new_test_ext().execute_with(|| {
-		let collection_id = create_test_collection(&CollectionMode::NFT, CollectionId(1));
-
-		let origin1 = Origin::signed(1);
-
-		let data = default_nft_data();
-		create_test_item(CollectionId(1), &data.into());
-
-		let variable_data = b"test data".to_vec();
-		assert_ok!(Unique::set_variable_meta_data(
-			origin1,
-			collection_id,
-			TokenId(1),
-			variable_data.clone().try_into().unwrap()
-		));
-
-		assert_eq!(
-			<pallet_nonfungible::TokenData<Test>>::get((collection_id, 1))
-				.unwrap()
-				.variable_data,
-			variable_data
-		);
-	});
-}
-
-#[test]
-fn set_variable_meta_data_on_re_fungible_token_stores_variable_meta_data() {
-	new_test_ext().execute_with(|| {
-		let collection_id = create_test_collection(&CollectionMode::ReFungible, CollectionId(1));
-
-		let origin1 = Origin::signed(1);
-
-		let data = default_re_fungible_data();
-		create_test_item(collection_id, &data.into());
-
-		let variable_data = b"test data".to_vec();
-		assert_ok!(Unique::set_variable_meta_data(
-			origin1,
-			collection_id,
-			TokenId(1),
-			variable_data.clone().try_into().unwrap()
-		));
-
-		assert_eq!(
-			<pallet_refungible::TokenData<Test>>::get((collection_id, TokenId(1))).variable_data,
-			variable_data
-		);
-	});
-}
-
-#[test]
-fn set_variable_meta_data_on_fungible_token_fails() {
-	new_test_ext().execute_with(|| {
-		let collection_id = create_test_collection(&CollectionMode::Fungible(3), CollectionId(1));
-
-		let origin1 = Origin::signed(1);
-
-		let data = default_fungible_data();
-		create_test_item(collection_id, &data.into());
-
-		let variable_data = b"test data".to_vec();
-		assert_noop!(
-			Unique::set_variable_meta_data(
-				origin1,
-				collection_id,
-				TokenId(0),
-				variable_data.try_into().unwrap()
-			)
-			.map_err(|e| e.error),
-			<pallet_fungible::Error<Test>>::FungibleItemsDontHaveData
-		);
-	});
-}
-
-#[test]
-fn set_variable_meta_data_on_nft_with_item_owner_permission_flag() {
-	new_test_ext().execute_with(|| {
-		//default_limits();
-
-		let collection_id = create_test_collection(&CollectionMode::NFT, CollectionId(1));
-
-		let origin1 = Origin::signed(1);
-
-		let data = default_nft_data();
-		create_test_item(collection_id, &data.into());
-
-		assert_ok!(Unique::set_meta_update_permission_flag(
-			origin1.clone(),
-			collection_id,
-			MetaUpdatePermission::ItemOwner,
-		));
-
-		let variable_data = b"ten chars.".to_vec();
-		assert_ok!(Unique::set_variable_meta_data(
-			origin1,
-			collection_id,
-			TokenId(1),
-			variable_data.clone().try_into().unwrap()
-		));
-
-		assert_eq!(
-			<pallet_nonfungible::TokenData<Test>>::get((collection_id, TokenId(1)))
-				.unwrap()
-				.variable_data,
-			variable_data
-		);
-	});
-}
-
-#[test]
 fn collection_transfer_flag_works() {
 	new_test_ext().execute_with(|| {
 		let origin1 = Origin::signed(1);
@@ -2585,163 +2468,6 @@
 		assert_eq!(
 			<pallet_nonfungible::AccountBalance<Test>>::get((collection_id, account(2))),
 			1
-		);
-	});
-}
-
-#[test]
-fn set_variable_meta_data_on_nft_with_admin_flag() {
-	new_test_ext().execute_with(|| {
-		// default_limits();
-
-		let collection_id =
-			create_test_collection_for_owner(&CollectionMode::NFT, 2, CollectionId(1));
-
-		let origin1 = Origin::signed(1);
-		let origin2 = Origin::signed(2);
-
-		assert_ok!(Unique::set_mint_permission(
-			origin2.clone(),
-			collection_id,
-			true
-		));
-		assert_ok!(Unique::add_to_allow_list(
-			origin2.clone(),
-			collection_id,
-			account(1)
-		));
-
-		assert_ok!(Unique::add_collection_admin(
-			origin2.clone(),
-			collection_id,
-			account(1)
-		));
-
-		let data = default_nft_data();
-		create_test_item(collection_id, &data.into());
-
-		assert_ok!(Unique::set_meta_update_permission_flag(
-			origin2.clone(),
-			collection_id,
-			MetaUpdatePermission::Admin,
-		));
-
-		let variable_data = b"test.".to_vec();
-		assert_ok!(Unique::set_variable_meta_data(
-			origin1,
-			collection_id,
-			TokenId(1),
-			variable_data.clone().try_into().unwrap()
-		));
-
-		assert_eq!(
-			<pallet_nonfungible::TokenData<Test>>::get((collection_id, 1))
-				.unwrap()
-				.variable_data,
-			variable_data
-		);
-	});
-}
-
-#[test]
-fn set_variable_meta_data_on_nft_with_admin_flag_neg() {
-	new_test_ext().execute_with(|| {
-		// default_limits();
-
-		let collection_id =
-			create_test_collection_for_owner(&CollectionMode::NFT, 2, CollectionId(1));
-
-		let origin1 = Origin::signed(1);
-		let origin2 = Origin::signed(2);
-
-		assert_ok!(Unique::set_mint_permission(
-			origin2.clone(),
-			collection_id,
-			true
-		));
-		assert_ok!(Unique::add_to_allow_list(
-			origin2.clone(),
-			collection_id,
-			account(1)
-		));
-
-		let data = default_nft_data();
-		create_test_item(collection_id, &data.into());
-
-		assert_ok!(Unique::set_meta_update_permission_flag(
-			origin2.clone(),
-			collection_id,
-			MetaUpdatePermission::Admin,
-		));
-
-		let variable_data = b"test.".to_vec();
-		assert_noop!(
-			Unique::set_variable_meta_data(
-				origin1,
-				collection_id,
-				TokenId(1),
-				variable_data.try_into().unwrap()
-			)
-			.map_err(|e| e.error),
-			CommonError::<Test>::NoPermission
-		);
-	});
-}
-
-#[test]
-fn set_variable_meta_flag_after_freeze() {
-	new_test_ext().execute_with(|| {
-		// default_limits();
-
-		let collection_id =
-			create_test_collection_for_owner(&CollectionMode::NFT, 2, CollectionId(1));
-
-		let origin2 = Origin::signed(2);
-
-		assert_ok!(Unique::set_meta_update_permission_flag(
-			origin2.clone(),
-			collection_id,
-			MetaUpdatePermission::None,
-		));
-		assert_noop!(
-			Unique::set_meta_update_permission_flag(
-				origin2.clone(),
-				collection_id,
-				MetaUpdatePermission::Admin
-			),
-			CommonError::<Test>::MetadataFlagFrozen
-		);
-	});
-}
-
-#[test]
-fn set_variable_meta_data_on_nft_with_none_flag_neg() {
-	new_test_ext().execute_with(|| {
-		// default_limits();
-
-		let collection_id =
-			create_test_collection_for_owner(&CollectionMode::NFT, 1, CollectionId(1));
-		let origin1 = Origin::signed(1);
-
-		let data = default_nft_data();
-		create_test_item(collection_id, &data.into());
-
-		assert_ok!(Unique::set_meta_update_permission_flag(
-			origin1.clone(),
-			collection_id,
-			MetaUpdatePermission::None,
-		));
-
-		let variable_data = b"test.".to_vec();
-		assert_noop!(
-			Unique::set_variable_meta_data(
-				origin1.clone(),
-				collection_id,
-				TokenId(1),
-				variable_data.try_into().unwrap()
-			)
-			.map_err(|e| e.error),
-			CommonError::<Test>::NoPermission
 		);
 	});
 }

--- a/smart_contracs/transfer/lib.rs
+++ b/smart_contracs/transfer/lib.rs
@@ -58,14 +58,12 @@
 pub enum CreateItemData {
     Nft {
         const_data: Vec<u8>,
-        variable_data: Vec<u8>,
     },
     Fungible {
         value: u128,
     },
     ReFungible {
         const_data: Vec<u8>,
-        variable_data: Vec<u8>,
         pieces: u128,
     },
 }
@@ -88,8 +86,6 @@
     fn approve(spender: DefaultAccountId, collection_id: u32, item_id: u32, amount: u128);
     #[ink(extension = 4, returns_result = false)]
     fn transfer_from(owner: DefaultAccountId, recipient: DefaultAccountId, collection_id: u32, item_id: u32, amount: u128);
-    #[ink(extension = 5, returns_result = false)]
-    fn set_variable_meta_data(collection_id: u32, item_id: u32, data: Vec<u8>);
     #[ink(extension = 6, returns_result = false)]
     fn toggle_allow_list(collection_id: u32, address: DefaultAccountId, allowlisted: bool);
 }
@@ -143,12 +139,6 @@
             let _ = self.env()
                 .extension()
                 .transfer_from(owner, recipient, collection_id, item_id, amount);
-        }
-        #[ink(message)]
-        pub fn set_variable_meta_data(&mut self, collection_id: u32, item_id: u32, data: Vec<u8>) {
-            let _ = self.env()
-                .extension()
-                .set_variable_meta_data(collection_id, item_id, data);
         }
         #[ink(message)]
         pub fn toggle_allow_list(&mut self, collection_id: u32, address: AccountId, allowlisted: bool) {

--- a/tests/package.json
+++ b/tests/package.json
@@ -40,7 +40,6 @@
     "testMigrationStructure": "mocha --timeout 9999999 -r ts-node/register ./**/nesting/migration-check.test.ts",
     "testAddCollectionAdmin": "mocha --timeout 9999999 -r ts-node/register ./**/addCollectionAdmin.test.ts",
     "testSetSchemaVersion": "mocha --timeout 9999999 -r ts-node/register ./**/setSchemaVersion.test.ts",
-    "testSetVariableMetaData": "mocha --timeout 9999999 -r ts-node/register ./**/setVariableMetaData.test.ts",
     "testSetCollectionLimits": "mocha --timeout 9999999 -r ts-node/register ./**/setCollectionLimits.test.ts",
     "testSetCollectionSponsor": "mocha --timeout 9999999 -r ts-node/register ./**/setCollectionSponsor.test.ts",
     "testConfirmSponsorship": "mocha --timeout 9999999 -r ts-node/register ./**/confirmSponsorship.test.ts",

--- a/tests/src/contracts.test.ts
+++ b/tests/src/contracts.test.ts
@@ -111,7 +111,7 @@
       await addToAllowListExpectSuccess(alice, collectionId, contract.address);
       await addToAllowListExpectSuccess(alice, collectionId, bob.address);
 
-      const transferTx = contract.tx.createItem(value, gasLimit, bob.address, collectionId, {Nft: {const_data: '0x010203', variable_data: '0x020304'}});
+      const transferTx = contract.tx.createItem(value, gasLimit, bob.address, collectionId, {Nft: {const_data: '0x010203'}});
       const events = await submitTransactionAsync(alice, transferTx);
       const result = getGenericResult(events);
       expect(result.success).to.be.true;
@@ -121,7 +121,6 @@
         {
           owner: bob.address,
           constData: '0x010203',
-          variableData: '0x020304',
         },
       ]);
     });
@@ -140,9 +139,9 @@
       await addToAllowListExpectSuccess(alice, collectionId, bob.address);
 
       const transferTx = contract.tx.createMultipleItems(value, gasLimit, bob.address, collectionId, [
-        {Nft: {const_data: '0x010203', variable_data: '0x020304'}},
-        {Nft: {const_data: '0x010204', variable_data: '0x020305'}},
-        {Nft: {const_data: '0x010205', variable_data: '0x020306'}},
+        {Nft: {const_data: '0x010203'}},
+        {Nft: {const_data: '0x010204'}},
+        {Nft: {const_data: '0x010205'}},
       ]);
       const events = await submitTransactionAsync(alice, transferTx);
       const result = getGenericResult(events);
@@ -155,17 +154,14 @@
         {
           Owner: bob.address,
           ConstData: '0x010203',
-          VariableData: '0x020304',
         },
         {
           Owner: bob.address,
           ConstData: '0x010204',
-          VariableData: '0x020305',
         },
         {
           Owner: bob.address,
           ConstData: '0x010205',
-          VariableData: '0x020306',
         },
       ]);
     });
@@ -208,24 +204,6 @@
 
       const token: any = (await api.query.unique.nftItemList(collectionId, tokenId) as any).unwrap();
       expect(token.owner.toString()).to.be.equal(charlie.address);
-    });
-  });
-
-  it('SetVariableMetaData CE', async () => {
-    await usingApi(async api => {
-      const alice = privateKey('//Alice');
-
-      const collectionId = await createCollectionExpectSuccess();
-      const [contract] = await deployTransferContract(api);
-      const tokenId = await createItemExpectSuccess(alice, collectionId, 'NFT', contract.address.toString());
-
-      const transferTx = contract.tx.setVariableMetaData(value, gasLimit, collectionId, tokenId, '0x121314');
-      const events = await submitTransactionAsync(alice, transferTx);
-      const result = getGenericResult(events);
-      expect(result.success).to.be.true;
-
-      const token: any = (await api.query.unique.nftItemList(collectionId, tokenId) as any).unwrap();
-      expect(token.variableData.toString()).to.be.equal('0x121314');
     });
   });
 

--- a/tests/src/createCollection.test.ts
+++ b/tests/src/createCollection.test.ts
@@ -74,7 +74,6 @@
           accountTokenOwnershipLimit: 3,
         },
         constOnChainSchema: '0x333333',
-        metaUpdatePermission: 'Admin',
       });
       const events = await submitTransactionAsync(alice, tx);
       const result = getCreateCollectionResult(events);
@@ -91,7 +90,6 @@
       expect(collection.sponsorship.asUnconfirmed.toString()).to.equal(bob.address);
       expect(collection.limits.accountTokenOwnershipLimit.unwrap().toNumber()).to.equal(3);
       expect(collection.constOnChainSchema.toString()).to.equal('0x333333');
-      expect(collection.metaUpdatePermission.isAdmin).to.be.true;
     });
   });
 });

--- a/tests/src/createMultipleItems.test.ts
+++ b/tests/src/createMultipleItems.test.ts
@@ -30,7 +30,6 @@
   getBalance,
   getTokenOwner,
   getLastTokenId,
-  getVariableMetadata,
   getConstMetadata,
   getCreatedCollectionCount,
   createCollectionWithPropsExpectSuccess,
@@ -47,9 +46,9 @@
       const itemsListIndexBefore = await getLastTokenId(api, collectionId);
       expect(itemsListIndexBefore).to.be.equal(0);
       const alice = privateKey('//Alice');
-      const args = [{Nft: {const_data: '0x31', variable_data: '0x31'}},
-        {Nft: {const_data: '0x32', variable_data: '0x32'}},
-        {Nft: {const_data: '0x33', variable_data: '0x33'}}];
+      const args = [{Nft: {const_data: '0x31'}},
+        {Nft: {const_data: '0x32'}},
+        {Nft: {const_data: '0x33'}}];
       const createMultipleItemsTx = api.tx.unique
         .createMultipleItems(collectionId, normalizeAccountId(alice.address), args);
       await submitTransactionAsync(alice, createMultipleItemsTx);
@@ -63,10 +62,6 @@
       expect(await getConstMetadata(api, collectionId, 1)).to.be.deep.equal([0x31]);
       expect(await getConstMetadata(api, collectionId, 2)).to.be.deep.equal([0x32]);
       expect(await getConstMetadata(api, collectionId, 3)).to.be.deep.equal([0x33]);
-
-      expect(await getVariableMetadata(api, collectionId, 1)).to.be.deep.equal([0x31]);
-      expect(await getVariableMetadata(api, collectionId, 2)).to.be.deep.equal([0x32]);
-      expect(await getVariableMetadata(api, collectionId, 3)).to.be.deep.equal([0x33]);
     });
   });
 
@@ -97,9 +92,9 @@
       expect(itemsListIndexBefore).to.be.equal(0);
       const alice = privateKey('//Alice');
       const args = [
-        {ReFungible: {const_data: [0x31], variable_data: [0x31], pieces: 1}},
-        {ReFungible: {const_data: [0x32], variable_data: [0x32], pieces: 1}},
-        {ReFungible: {const_data: [0x33], variable_data: [0x33], pieces: 1}},
+        {ReFungible: {const_data: [0x31], pieces: 1}},
+        {ReFungible: {const_data: [0x32], pieces: 1}},
+        {ReFungible: {const_data: [0x33], pieces: 1}},
       ];
       const createMultipleItemsTx = api.tx.unique
         .createMultipleItems(collectionId, normalizeAccountId(alice.address), args);
@@ -114,10 +109,6 @@
       expect(await getConstMetadata(api, collectionId, 1)).to.be.deep.equal([0x31]);
       expect(await getConstMetadata(api, collectionId, 2)).to.be.deep.equal([0x32]);
       expect(await getConstMetadata(api, collectionId, 3)).to.be.deep.equal([0x33]);
-
-      expect(await getVariableMetadata(api, collectionId, 1)).to.be.deep.equal([0x31]);
-      expect(await getVariableMetadata(api, collectionId, 2)).to.be.deep.equal([0x32]);
-      expect(await getVariableMetadata(api, collectionId, 3)).to.be.deep.equal([0x33]);
     });
   });
 
@@ -130,8 +121,8 @@
         tokenLimit: 2,
       });
       const args = [
-        {NFT: {const_data: 'A', variable_data: 'A'}},
-        {NFT: {const_data: 'B', variable_data: 'B'}},
+        {NFT: {const_data: 'A'}},
+        {NFT: {const_data: 'B'}},
       ];
       const createMultipleItemsTx = api.tx.unique.createMultipleItems(collectionId, normalizeAccountId(alice.address), args);
       const events = await submitTransactionAsync(alice, createMultipleItemsTx);
@@ -146,9 +137,10 @@
       const itemsListIndexBefore = await getLastTokenId(api, collectionId);
       expect(itemsListIndexBefore).to.be.equal(0);
       const alice = privateKey('//Alice');
-      const args = [{Nft: {const_data: '0x31', variable_data: '0x31'}},
-        {Nft: {const_data: '0x32', variable_data: '0x32'}},
-        {Nft: {const_data: '0x33', variable_data: '0x33'}}];
+      const bob = privateKey('//Bob');
+      const args = [{Nft: {const_data: '0x31'}},
+        {Nft: {const_data: '0x32'}},
+        {Nft: {const_data: '0x33'}}];
       const createMultipleItemsTx = api.tx.unique
         .createMultipleItems(collectionId, normalizeAccountId(alice.address), args);
       await submitTransactionAsync(alice, createMultipleItemsTx);
@@ -156,9 +148,9 @@
       expect(itemsListIndexAfter).to.be.equal(3);
 
       await expect(executeTransaction(
-        api, 
-        alice, 
-        api.tx.unique.setPropertyPermissions(collectionId, [{key: 'k', permission: {mutable: true, collectionAdmin: true, tokenOwner: false}}]), 
+        api,
+        alice,
+        api.tx.unique.setPropertyPermissions(collectionId, [{key: 'k', permission: {mutable: true, collectionAdmin: true, tokenOwner: false}}]),
       )).to.not.be.rejected;
 
       expect(await getTokenOwner(api, collectionId, 1)).to.be.deep.equal(normalizeAccountId(alice.address));
@@ -168,10 +160,6 @@
       expect(await getConstMetadata(api, collectionId, 1)).to.be.deep.equal([0x31]);
       expect(await getConstMetadata(api, collectionId, 2)).to.be.deep.equal([0x32]);
       expect(await getConstMetadata(api, collectionId, 3)).to.be.deep.equal([0x33]);
-
-      expect(await getVariableMetadata(api, collectionId, 1)).to.be.deep.equal([0x31]);
-      expect(await getVariableMetadata(api, collectionId, 2)).to.be.deep.equal([0x32]);
-      expect(await getVariableMetadata(api, collectionId, 3)).to.be.deep.equal([0x33]);
     });
   });
 
@@ -181,9 +169,10 @@
       const itemsListIndexBefore = await getLastTokenId(api, collectionId);
       expect(itemsListIndexBefore).to.be.equal(0);
       const alice = privateKey('//Alice');
-      const args = [{Nft: {const_data: '0x31', variable_data: '0x31'}},
-        {Nft: {const_data: '0x32', variable_data: '0x32'}},
-        {Nft: {const_data: '0x33', variable_data: '0x33'}}];
+      const bob = privateKey('//Bob');
+      const args = [{Nft: {const_data: '0x31'}},
+        {Nft: {const_data: '0x32'}},
+        {Nft: {const_data: '0x33'}}];
       const createMultipleItemsTx = api.tx.unique
         .createMultipleItems(collectionId, normalizeAccountId(alice.address), args);
       await submitTransactionAsync(alice, createMultipleItemsTx);
@@ -191,9 +180,9 @@
       expect(itemsListIndexAfter).to.be.equal(3);
 
       await expect(executeTransaction(
-        api, 
-        alice, 
-        api.tx.unique.setPropertyPermissions(collectionId, [{key: 'k', permission: {mutable: false, collectionAdmin: true, tokenOwner: false}}]), 
+        api,
+        alice,
+        api.tx.unique.setPropertyPermissions(collectionId, [{key: 'k', permission: {mutable: false, collectionAdmin: true, tokenOwner: false}}]),
       )).to.not.be.rejected;
 
       expect(await getTokenOwner(api, collectionId, 1)).to.be.deep.equal(normalizeAccountId(alice.address));
@@ -203,10 +192,6 @@
       expect(await getConstMetadata(api, collectionId, 1)).to.be.deep.equal([0x31]);
       expect(await getConstMetadata(api, collectionId, 2)).to.be.deep.equal([0x32]);
       expect(await getConstMetadata(api, collectionId, 3)).to.be.deep.equal([0x33]);
-
-      expect(await getVariableMetadata(api, collectionId, 1)).to.be.deep.equal([0x31]);
-      expect(await getVariableMetadata(api, collectionId, 2)).to.be.deep.equal([0x32]);
-      expect(await getVariableMetadata(api, collectionId, 3)).to.be.deep.equal([0x33]);
     });
   });
 
@@ -216,9 +201,10 @@
       const itemsListIndexBefore = await getLastTokenId(api, collectionId);
       expect(itemsListIndexBefore).to.be.equal(0);
       const alice = privateKey('//Alice');
-      const args = [{Nft: {const_data: '0x31', variable_data: '0x31'}},
-        {Nft: {const_data: '0x32', variable_data: '0x32'}},
-        {Nft: {const_data: '0x33', variable_data: '0x33'}}];
+      const bob = privateKey('//Bob');
+      const args = [{Nft: {const_data: '0x31'}},
+        {Nft: {const_data: '0x32'}},
+        {Nft: {const_data: '0x33'}}];
       const createMultipleItemsTx = api.tx.unique
         .createMultipleItems(collectionId, normalizeAccountId(alice.address), args);
       await submitTransactionAsync(alice, createMultipleItemsTx);
@@ -226,9 +212,9 @@
       expect(itemsListIndexAfter).to.be.equal(3);
 
       await expect(executeTransaction(
-        api, 
-        alice, 
-        api.tx.unique.setPropertyPermissions(collectionId, [{key: 'k', permission: {mutable: true, collectionAdmin: true, tokenOwner: true}}]), 
+        api,
+        alice,
+        api.tx.unique.setPropertyPermissions(collectionId, [{key: 'k', permission: {mutable: true, collectionAdmin: true, tokenOwner: true}}]),
       )).to.not.be.rejected;
 
       expect(await getTokenOwner(api, collectionId, 1)).to.be.deep.equal(normalizeAccountId(alice.address));
@@ -238,10 +224,6 @@
       expect(await getConstMetadata(api, collectionId, 1)).to.be.deep.equal([0x31]);
       expect(await getConstMetadata(api, collectionId, 2)).to.be.deep.equal([0x32]);
       expect(await getConstMetadata(api, collectionId, 3)).to.be.deep.equal([0x33]);
-
-      expect(await getVariableMetadata(api, collectionId, 1)).to.be.deep.equal([0x31]);
-      expect(await getVariableMetadata(api, collectionId, 2)).to.be.deep.equal([0x32]);
-      expect(await getVariableMetadata(api, collectionId, 3)).to.be.deep.equal([0x33]);
     });
   });
 });
@@ -264,9 +246,9 @@
       const itemsListIndexBefore = await getLastTokenId(api, collectionId);
       expect(itemsListIndexBefore).to.be.equal(0);
       await addCollectionAdminExpectSuccess(alice, collectionId, bob.address);
-      const args = [{Nft: {const_data: '0x31', variable_data: '0x31'}},
-        {Nft: {const_data: '0x32', variable_data: '0x32'}},
-        {Nft: {const_data: '0x33', variable_data: '0x33'}}];
+      const args = [{Nft: {const_data: '0x31'}},
+        {Nft: {const_data: '0x32'}},
+        {Nft: {const_data: '0x33'}}];
       const createMultipleItemsTx = api.tx.unique
         .createMultipleItems(collectionId, normalizeAccountId(bob.address), args);
       await submitTransactionAsync(bob, createMultipleItemsTx);
@@ -280,10 +262,6 @@
       expect(await getConstMetadata(api, collectionId, 1)).to.be.deep.equal([0x31]);
       expect(await getConstMetadata(api, collectionId, 2)).to.be.deep.equal([0x32]);
       expect(await getConstMetadata(api, collectionId, 3)).to.be.deep.equal([0x33]);
-
-      expect(await getVariableMetadata(api, collectionId, 1)).to.be.deep.equal([0x31]);
-      expect(await getVariableMetadata(api, collectionId, 2)).to.be.deep.equal([0x32]);
-      expect(await getVariableMetadata(api, collectionId, 3)).to.be.deep.equal([0x33]);
     });
   });
 
@@ -314,9 +292,9 @@
       expect(itemsListIndexBefore).to.be.equal(0);
       await addCollectionAdminExpectSuccess(alice, collectionId, bob.address);
       const args = [
-        {ReFungible: {const_data: [0x31], variable_data: [0x31], pieces: 1}},
-        {ReFungible: {const_data: [0x32], variable_data: [0x32], pieces: 1}},
-        {ReFungible: {const_data: [0x33], variable_data: [0x33], pieces: 1}},
+        {ReFungible: {const_data: [0x31], pieces: 1}},
+        {ReFungible: {const_data: [0x32], pieces: 1}},
+        {ReFungible: {const_data: [0x33], pieces: 1}},
       ];
       const createMultipleItemsTx = api.tx.unique
         .createMultipleItems(collectionId, normalizeAccountId(bob.address), args);
@@ -331,10 +309,6 @@
       expect(await getConstMetadata(api, collectionId, 1)).to.be.deep.equal([0x31]);
       expect(await getConstMetadata(api, collectionId, 2)).to.be.deep.equal([0x32]);
       expect(await getConstMetadata(api, collectionId, 3)).to.be.deep.equal([0x33]);
-
-      expect(await getVariableMetadata(api, collectionId, 1)).to.be.deep.equal([0x31]);
-      expect(await getVariableMetadata(api, collectionId, 2)).to.be.deep.equal([0x32]);
-      expect(await getVariableMetadata(api, collectionId, 3)).to.be.deep.equal([0x33]);
     });
   });
 });
@@ -356,9 +330,9 @@
       const collectionId = await createCollectionExpectSuccess();
       const itemsListIndexBefore = await getLastTokenId(api, collectionId);
       expect(itemsListIndexBefore).to.be.equal(0);
-      const args = [{Nft: {const_data: '0x31', variable_data: '0x31'}},
-        {Nft: {const_data: '0x32', variable_data: '0x32'}},
-        {Nft: {const_data: '0x33', variable_data: '0x33'}}];
+      const args = [{Nft: {const_data: '0x31'}},
+        {Nft: {const_data: '0x32'}},
+        {Nft: {const_data: '0x33'}}];
       const createMultipleItemsTx = api.tx.unique
         .createMultipleItems(collectionId, normalizeAccountId(alice.address), args);
       await expect(submitTransactionAsync(bob, createMultipleItemsTx)).to.be.rejected;
@@ -387,9 +361,9 @@
       const itemsListIndexBefore = await getLastTokenId(api, collectionId);
       expect(itemsListIndexBefore).to.be.equal(0);
       const args = [
-        {ReFungible: {const_data: [0x31], variable_data: [0x31], pieces: 1}},
-        {ReFungible: {const_data: [0x32], variable_data: [0x32], pieces: 1}},
-        {ReFungible: {const_data: [0x33], variable_data: [0x33], pieces: 1}},
+        {ReFungible: {const_data: [0x31], pieces: 1}},
+        {ReFungible: {const_data: [0x32], pieces: 1}},
+        {ReFungible: {const_data: [0x33], pieces: 1}},
       ];
       const createMultipleItemsTx = api.tx.unique
         .createMultipleItems(collectionId, normalizeAccountId(alice.address), args);
@@ -412,9 +386,9 @@
       const collectionId = await createCollectionExpectSuccess();
       const alice = privateKey('//Alice');
       const args = [
-        {NFT: {const_data: 'A'.repeat(2049), variable_data: 'A'.repeat(2049)}},
-        {NFT: {const_data: 'B'.repeat(2049), variable_data: 'B'.repeat(2049)}},
-        {NFT: {const_data: 'C'.repeat(2049), variable_data: 'C'.repeat(2049)}},
+        {NFT: {const_data: 'A'.repeat(2049)}},
+        {NFT: {const_data: 'B'.repeat(2049)}},
+        {NFT: {const_data: 'C'.repeat(2049)}},
       ];
       const createMultipleItemsTx = api.tx.unique
         .createMultipleItems(collectionId, normalizeAccountId(alice.address), args);
@@ -424,9 +398,9 @@
       const collectionIdReFungible =
         await createCollectionExpectSuccess({mode: {type: 'ReFungible'}});
       const argsReFungible = [
-        {ReFungible: ['1'.repeat(2049), '1'.repeat(2049), 10]},
-        {ReFungible: ['2'.repeat(2049), '2'.repeat(2049), 10]},
-        {ReFungible: ['3'.repeat(2049), '3'.repeat(2049), 10]},
+        {ReFungible: ['1'.repeat(2049), 10]},
+        {ReFungible: ['2'.repeat(2049), 10]},
+        {ReFungible: ['3'.repeat(2049), 10]},
       ];
       const createMultipleItemsTxFungible = api.tx.unique
         .createMultipleItems(collectionIdReFungible, normalizeAccountId(alice.address), argsReFungible);
@@ -449,9 +423,8 @@
     await usingApi(async (api: ApiPromise) => {
       const collectionId = await createCollectionExpectSuccess();
       const args = [
-        {NFT: {const_data: 'A', variable_data: 'A'}},
-        {NFT: {const_data: 'B', variable_data: 'B'.repeat(2049)}},
-        {NFT: {const_data: 'C'.repeat(2049), variable_data: 'C'}},
+        {NFT: {const_data: 'A'}},
+        {NFT: {const_data: 'B'.repeat(2049)}},
       ];
       const createMultipleItemsTx = await api.tx.unique
         .createMultipleItems(collectionId, normalizeAccountId(alice.address), args);
@@ -467,8 +440,8 @@
         tokenLimit: 1,
       });
       const args = [
-        {NFT: {const_data: 'A', variable_data: 'A'}},
-        {NFT: {const_data: 'B', variable_data: 'B'}},
+        {NFT: {const_data: 'A'}},
+        {NFT: {const_data: 'B'}},
       ];
       const createMultipleItemsTx = api.tx.unique.createMultipleItems(collectionId, normalizeAccountId(alice.address), args);
       await expect(submitTransactionExpectFailAsync(alice, createMultipleItemsTx)).to.be.rejected;
@@ -482,10 +455,10 @@
       const itemsListIndexBefore = await getLastTokenId(api, collectionId);
       expect(itemsListIndexBefore).to.be.equal(0);
       await addCollectionAdminExpectSuccess(alice, collectionId, bob.address);
-      const args = [{Nft: {const_data: '0x31', variable_data: '0x31'}},
-        {Nft: {const_data: '0x32', variable_data: '0x32'}},
-        {Nft: {const_data: '0x33', variable_data: '0x33'}}];
-      
+      const args = [{Nft: {const_data: '0x31'}},
+        {Nft: {const_data: '0x32'}},
+        {Nft: {const_data: '0x33'}}];
+
       const createMultipleItemsTx = api.tx.unique.createMultipleItems(collectionId, normalizeAccountId(alice.address), args);
 
       const events = await submitTransactionAsync(alice, createMultipleItemsTx);
@@ -493,9 +466,9 @@
 
       for (const elem of result) {
         await expect(executeTransaction(
-          api, 
-          bob, 
-          api.tx.unique.setTokenProperties(elem.collectionId, elem.itemId, [{key: 'key1', value: 'v2'}]), 
+          api,
+          bob,
+          api.tx.unique.setTokenProperties(elem.collectionId, elem.itemId, [{key: 'key1', value: 'v2'}]),
         )).to.be.rejected;
       }
 
@@ -510,10 +483,10 @@
       const itemsListIndexBefore = await getLastTokenId(api, collectionId);
       expect(itemsListIndexBefore).to.be.equal(0);
       await addCollectionAdminExpectSuccess(alice, collectionId, bob.address);
-      const args = [{Nft: {const_data: '0x31', variable_data: '0x31'}},
-        {Nft: {const_data: '0x32', variable_data: '0x32'}},
-        {Nft: {const_data: '0x33', variable_data: '0x33'}}];
-      
+      const args = [{Nft: {const_data: '0x31'}},
+        {Nft: {const_data: '0x32'}},
+        {Nft: {const_data: '0x33'}}];
+
       const createMultipleItemsTx = api.tx.unique.createMultipleItems(collectionId, normalizeAccountId(alice.address), args);
 
       const events = await submitTransactionAsync(alice, createMultipleItemsTx);
@@ -521,9 +494,9 @@
 
       for (const elem of result) {
         await expect(executeTransaction(
-          api, 
-          bob, 
-          api.tx.unique.setTokenProperties(elem.collectionId, elem.itemId, [{key: 'key1', value: 'v2'}]), 
+          api,
+          bob,
+          api.tx.unique.setTokenProperties(elem.collectionId, elem.itemId, [{key: 'key1', value: 'v2'}]),
         )).to.be.rejected;
       }
     });
@@ -535,10 +508,10 @@
       const itemsListIndexBefore = await getLastTokenId(api, collectionId);
       await addCollectionAdminExpectSuccess(alice, collectionId, bob.address);
       expect(itemsListIndexBefore).to.be.equal(0);
-      const args = [{Nft: {const_data: '0x31', variable_data: '0x31'}},
-        {Nft: {const_data: '0x32', variable_data: '0x32'}},
-        {Nft: {const_data: '0x33', variable_data: '0x33'}}];
-      
+      const args = [{Nft: {const_data: '0x31'}},
+        {Nft: {const_data: '0x32'}},
+        {Nft: {const_data: '0x33'}}];
+
       const createMultipleItemsTx = api.tx.unique.createMultipleItems(collectionId, normalizeAccountId(alice.address), args);
 
       const events = await submitTransactionAsync(alice, createMultipleItemsTx);
@@ -546,9 +519,9 @@
 
       for (const elem of result) {
         await expect(executeTransaction(
-          api, 
-          bob, 
-          api.tx.unique.setTokenProperties(elem.collectionId, elem.itemId, [{key: 'key1', value: 'v2'}]), 
+          api,
+          bob,
+          api.tx.unique.setTokenProperties(elem.collectionId, elem.itemId, [{key: 'key1', value: 'v2'}]),
         )).to.be.rejected;
       }
     });
@@ -562,28 +535,28 @@
       expect(itemsListIndexBefore).to.be.equal(0);
       await addCollectionAdminExpectSuccess(alice, collectionId, bob.address);
 
-      const args = [{Nft: {const_data: '0x31', variable_data: '0x31'}},
-        {Nft: {const_data: '0x32', variable_data: '0x32'}},
-        {Nft: {const_data: '0x33', variable_data: '0x33'}}];
-      
+      const args = [{Nft: {const_data: '0x31'}},
+        {Nft: {const_data: '0x32'}},
+        {Nft: {const_data: '0x33'}}];
+
       const createMultipleItemsTx = api.tx.unique.createMultipleItems(collectionId, normalizeAccountId(alice.address), args);
       const events = await submitTransactionAsync(alice, createMultipleItemsTx);
 
       const result = getCreateItemsResult(events);
-      
+
       const prps = [];
-      
+
       for (let i = 0; i < 65; i++) {
         prps.push({key: `key${i}`, value: `value${i}`});
       }
 
       await expect(executeTransaction(api, bob, api.tx.unique.setCollectionProperties(collectionId, prps))).to.be.rejectedWith(/common\.PropertyLimitReached/);
-      
+
       for (const elem of result) {
         await expect(executeTransaction(
-          api, 
-          bob, 
-          api.tx.unique.setTokenProperties(elem.collectionId, elem.itemId, prps), 
+          api,
+          bob,
+          api.tx.unique.setTokenProperties(elem.collectionId, elem.itemId, prps),
         )).to.be.rejected;
       }
     });
@@ -595,10 +568,10 @@
         propPerm:   [{key: 'key1', mutable: true, collectionAdmin: false, tokenOwner: false}]});
       const itemsListIndexBefore = await getLastTokenId(api, collectionId);
       expect(itemsListIndexBefore).to.be.equal(0);
-      const args = [{Nft: {const_data: '0x31', variable_data: '0x31'}},
-        {Nft: {const_data: '0x32', variable_data: '0x32'}},
-        {Nft: {const_data: '0x33', variable_data: '0x33'}}];
-      
+      const args = [{Nft: {const_data: '0x31'}},
+        {Nft: {const_data: '0x32'}},
+        {Nft: {const_data: '0x33'}}];
+
       const createMultipleItemsTx = api.tx.unique.createMultipleItems(collectionId, normalizeAccountId(alice.address), args);
 
       const events = await submitTransactionAsync(alice, createMultipleItemsTx);
@@ -609,9 +582,9 @@
 
       for (const elem of result) {
         await expect(executeTransaction(
-          api, 
-          bob, 
-          api.tx.unique.setTokenProperties(elem.collectionId, elem.itemId, [{key: 'k', value: 'vvvvvv'.repeat(5000)}, {key: 'k2', value: 'vvv'.repeat(5000)}]), 
+          api,
+          bob,
+          api.tx.unique.setTokenProperties(elem.collectionId, elem.itemId, [{key: 'k', value: 'vvvvvv'.repeat(5000)}, {key: 'k2', value: 'vvv'.repeat(5000)}]),
         )).to.be.rejected;
       }
     });

--- a/tests/src/createMultipleItemsEx.test.ts
+++ b/tests/src/createMultipleItemsEx.test.ts
@@ -30,15 +30,12 @@
         {
           owner: {substrate: alice.address},
           constData: '0x0000',
-          variableData: '0x1111',
         }, {
           owner: {substrate: bob.address},
           constData: '0x2222',
-          variableData: '0x3333',
         }, {
           owner: {substrate: charlie.address},
           constData: '0x4444',
-          variableData: '0x5555',
         },
       ];
 
@@ -61,22 +58,19 @@
         {
           owner: {substrate: alice.address},
           constData: '0x0000',
-          variableData: '0x1111',
         }, {
           owner: {substrate: bob.address},
           constData: '0x2222',
-          variableData: '0x3333',
         }, {
           owner: {substrate: charlie.address},
           constData: '0x4444',
-          variableData: '0x5555',
         },
       ];
 
       await expect(executeTransaction(
-        api, 
-        alice, 
-        api.tx.unique.setPropertyPermissions(collection, [{key: 'k', permission: {mutable: true, collectionAdmin: true, tokenOwner: false}}]), 
+        api,
+        alice,
+        api.tx.unique.setPropertyPermissions(collection, [{key: 'k', permission: {mutable: true, collectionAdmin: true, tokenOwner: false}}]),
       )).to.not.be.rejected;
 
       await executeTransaction(api, alice, api.tx.unique.createMultipleItemsEx(collection, {
@@ -98,28 +92,25 @@
         {
           owner: {substrate: alice.address},
           constData: '0x0000',
-          variableData: '0x1111',
         }, {
           owner: {substrate: bob.address},
           constData: '0x2222',
-          variableData: '0x3333',
         }, {
           owner: {substrate: charlie.address},
           constData: '0x4444',
-          variableData: '0x5555',
         },
       ];
       await expect(executeTransaction(
-        api, 
-        alice, 
-        api.tx.unique.setPropertyPermissions(collection, [{key: 'k', permission: {mutable: false, collectionAdmin: true, tokenOwner: false}}]), 
+        api,
+        alice,
+        api.tx.unique.setPropertyPermissions(collection, [{key: 'k', permission: {mutable: false, collectionAdmin: true, tokenOwner: false}}]),
       )).to.not.be.rejected;
 
       await executeTransaction(api, alice, api.tx.unique.createMultipleItemsEx(collection, {
         NFT: data,
       }));
-      
 
+
       const tokens = await api.query.nonfungible.tokenData.entries(collection);
       const json = tokens.map(([, token]) => token.toJSON());
       expect(json).to.be.deep.equal(data);
@@ -136,28 +127,25 @@
         {
           owner: {substrate: alice.address},
           constData: '0x0000',
-          variableData: '0x1111',
         }, {
           owner: {substrate: bob.address},
           constData: '0x2222',
-          variableData: '0x3333',
         }, {
           owner: {substrate: charlie.address},
           constData: '0x4444',
-          variableData: '0x5555',
         },
       ];
       await expect(executeTransaction(
-        api, 
-        alice, 
-        api.tx.unique.setPropertyPermissions(collection, [{key: 'k', permission: {mutable: true, collectionAdmin: true, tokenOwner: true}}]), 
+        api,
+        alice,
+        api.tx.unique.setPropertyPermissions(collection, [{key: 'k', permission: {mutable: true, collectionAdmin: true, tokenOwner: true}}]),
       )).to.not.be.rejected;
 
       await executeTransaction(api, alice, api.tx.unique.createMultipleItemsEx(collection, {
         NFT: data,
       }));
-      
 
+
       const tokens = await api.query.nonfungible.tokenData.entries(collection);
       const json = tokens.map(([, token]) => token.toJSON());
       expect(json).to.be.deep.equal(data);
@@ -184,15 +172,15 @@
 
       const tx = api.tx.unique.createMultipleItemsEx(collection, {NFT: data});
       await executeTransaction(api, alice, tx);
-      
+
       const events = await submitTransactionAsync(alice, tx);
       const result = getCreateItemsResult(events);
-      
+
       for (const elem of result) {
         await expect(executeTransaction(
-          api, 
-          bob, 
-          api.tx.unique.setTokenProperties(elem.collectionId, elem.itemId, [{key: 'key1', value: 'v2'}]), 
+          api,
+          bob,
+          api.tx.unique.setTokenProperties(elem.collectionId, elem.itemId, [{key: 'key1', value: 'v2'}]),
         )).to.be.rejected;
       }
     });
@@ -218,15 +206,15 @@
 
       const tx = api.tx.unique.createMultipleItemsEx(collection, {NFT: data});
       await executeTransaction(api, alice, tx);
-      
+
       const events = await submitTransactionAsync(alice, tx);
       const result = getCreateItemsResult(events);
-      
+
       for (const elem of result) {
         await expect(executeTransaction(
-          api, 
-          bob, 
-          api.tx.unique.setTokenProperties(elem.collectionId, elem.itemId, [{key: 'key1', value: 'v2'}]), 
+          api,
+          bob,
+          api.tx.unique.setTokenProperties(elem.collectionId, elem.itemId, [{key: 'key1', value: 'v2'}]),
         )).to.be.rejected;
       }
     });
@@ -251,15 +239,15 @@
 
       const tx = api.tx.unique.createMultipleItemsEx(collection, {NFT: data});
       await executeTransaction(api, alice, tx);
-      
+
       const events = await submitTransactionAsync(alice, tx);
       const result = getCreateItemsResult(events);
-      
+
       for (const elem of result) {
         await expect(executeTransaction(
-          api, 
-          bob, 
-          api.tx.unique.setTokenProperties(elem.collectionId, elem.itemId, [{key: 'key1', value: 'v2'}]), 
+          api,
+          bob,
+          api.tx.unique.setTokenProperties(elem.collectionId, elem.itemId, [{key: 'key1', value: 'v2'}]),
         )).to.be.rejected;
       }
     });
@@ -284,24 +272,24 @@
 
       const tx = api.tx.unique.createMultipleItemsEx(collection, {NFT: data});
       await executeTransaction(api, alice, tx);
-      
+
       const events = await submitTransactionAsync(alice, tx);
       const result = getCreateItemsResult(events);
 
       const prps = [];
-      
+
       for (let i = 0; i < 65; i++) {
         prps.push({key: `key${i}`, value: `value${i}`});
       }
 
       await expect(executeTransaction(api, bob, api.tx.unique.setCollectionProperties(collection, prps))).to.be.rejectedWith(/common\.PropertyLimitReached/);
 
-      
+
       for (const elem of result) {
         await expect(executeTransaction(
-          api, 
-          bob, 
-          api.tx.unique.setTokenProperties(elem.collectionId, elem.itemId, prps), 
+          api,
+          bob,
+          api.tx.unique.setTokenProperties(elem.collectionId, elem.itemId, prps),
         )).to.be.rejected;
       }
     });
@@ -326,7 +314,7 @@
 
       const tx = api.tx.unique.createMultipleItemsEx(collection, {NFT: data});
       await executeTransaction(api, alice, tx);
-      
+
       const events = await submitTransactionAsync(alice, tx);
       const result = getCreateItemsResult(events);
 
@@ -334,12 +322,12 @@
 
       await expect(executeTransaction(api, bob, api.tx.unique.setCollectionProperties(collection, prps))).to.be.rejectedWith(/common\.NoSpaceForProperty/);
 
-      
+
       for (const elem of result) {
         await expect(executeTransaction(
-          api, 
-          bob, 
-          api.tx.unique.setTokenProperties(elem.collectionId, elem.itemId, prps), 
+          api,
+          bob,
+          api.tx.unique.setTokenProperties(elem.collectionId, elem.itemId, prps),
         )).to.be.rejected;
       }
     });
@@ -355,15 +343,12 @@
         {
           owner: {substrate: alice.address},
           constData: '0x0000',
-          variableData: '0x1111',
         }, {
           owner: {substrate: bob.address},
           constData: '0x2222',
-          variableData: '0x3333',
         }, {
           owner: {substrate: charlie.address},
           constData: '0x4444',
-          variableData: '0x5555',
         },
       ];
 
@@ -386,15 +371,12 @@
         {
           owner: {substrate: alice.address},
           constData: '0x0000',
-          variableData: '0x1111',
         }, {
           owner: {substrate: bob.address},
           constData: '0x2222',
-          variableData: '0x3333',
         }, {
           owner: {substrate: charlie.address},
           constData: '0x4444',
-          variableData: '0x5555',
         },
       ];
 

--- a/tests/src/eth/api/UniqueFungible.sol
+++ b/tests/src/eth/api/UniqueFungible.sol
@@ -22,6 +22,12 @@
 	);
 }
 
+// Selector: 79cc6790
+interface ERC20UniqueExtensions is Dummy, ERC165 {
+	// Selector: burnFrom(address,uint256) 79cc6790
+	function burnFrom(address from, uint256 amount) external returns (bool);
+}
+
 // Selector: 942e8b22
 interface ERC20 is Dummy, ERC165, ERC20Events {
 	// Selector: name() 06fdde03
@@ -59,4 +65,28 @@
 		returns (uint256);
 }
 
-interface UniqueFungible is Dummy, ERC165, ERC20 {}
+// Selector: 9b5e29c5
+interface CollectionProperties is Dummy, ERC165 {
+	// Selector: setCollectionProperty(string,bytes) 2f073f66
+	function setCollectionProperty(string memory key, bytes memory value)
+		external;
+
+	// Selector: deleteCollectionProperty(string) 7b7debce
+	function deleteCollectionProperty(string memory key) external;
+
+	// Throws error if key not found
+	//
+	// Selector: collectionProperty(string) cf24fd6d
+	function collectionProperty(string memory key)
+		external
+		view
+		returns (bytes memory);
+}
+
+interface UniqueFungible is
+	Dummy,
+	ERC165,
+	ERC20,
+	ERC20UniqueExtensions,
+	CollectionProperties
+{}

--- a/tests/src/eth/api/UniqueNFT.sol
+++ b/tests/src/eth/api/UniqueNFT.sol
@@ -42,6 +42,35 @@
 	event MintingFinished();
 }
 
+// Selector: 41369377
+interface TokenProperties is Dummy, ERC165 {
+	// Selector: setTokenPropertyPermission(string,bool,bool,bool) 222d97fa
+	function setTokenPropertyPermission(
+		string memory key,
+		bool isMutable,
+		bool collectionAdmin,
+		bool tokenOwner
+	) external;
+
+	// Selector: setProperty(uint256,string,bytes) 1752d67b
+	function setProperty(
+		uint256 tokenId,
+		string memory key,
+		bytes memory value
+	) external;
+
+	// Selector: deleteProperty(uint256,string) 066111d1
+	function deleteProperty(uint256 tokenId, string memory key) external;
+
+	// Throws error if key not found
+	//
+	// Selector: property(uint256,string) 7228c327
+	function property(uint256 tokenId, string memory key)
+		external
+		view
+		returns (bytes memory);
+}
+
 // Selector: 42966c68
 interface ERC721Burnable is Dummy, ERC165 {
 	// Selector: burn(uint256) 42966c68
@@ -162,7 +191,25 @@
 	function totalSupply() external view returns (uint256);
 }
 
-// Selector: e562194d
+// Selector: 9b5e29c5
+interface CollectionProperties is Dummy, ERC165 {
+	// Selector: setCollectionProperty(string,bytes) 2f073f66
+	function setCollectionProperty(string memory key, bytes memory value)
+		external;
+
+	// Selector: deleteCollectionProperty(string) 7b7debce
+	function deleteCollectionProperty(string memory key) external;
+
+	// Throws error if key not found
+	//
+	// Selector: collectionProperty(string) cf24fd6d
+	function collectionProperty(string memory key)
+		external
+		view
+		returns (bytes memory);
+}
+
+// Selector: d74d154f
 interface ERC721UniqueExtensions is Dummy, ERC165 {
 	// Selector: transfer(address,uint256) a9059cbb
 	function transfer(address to, uint256 tokenId) external;
@@ -172,16 +219,7 @@
 
 	// Selector: nextTokenId() 75794a3c
 	function nextTokenId() external view returns (uint256);
-
-	// Selector: setVariableMetadata(uint256,bytes) d4eac26d
-	function setVariableMetadata(uint256 tokenId, bytes memory data) external;
 
-	// Selector: getVariableMetadata(uint256) e6c5ce6f
-	function getVariableMetadata(uint256 tokenId)
-		external
-		view
-		returns (bytes memory);
-
 	// Selector: mintBulk(address,uint256[]) 44a9945e
 	function mintBulk(address to, uint256[] memory tokenIds)
 		external
@@ -201,5 +239,7 @@
 	ERC721Enumerable,
 	ERC721UniqueExtensions,
 	ERC721Mintable,
-	ERC721Burnable
+	ERC721Burnable,
+	CollectionProperties,
+	TokenProperties
 {}

--- a/tests/src/eth/base.test.ts
+++ b/tests/src/eth/base.test.ts
@@ -79,7 +79,7 @@
       minter = createEthAccount(web3);
     });
   });
-  
+
   itWeb3('interfaceID == 0xffffffff always false', async ({web3}) => {
     expect(await contract(web3).methods.supportsInterface('0xffffffff').call()).to.be.false;
   });
@@ -101,7 +101,7 @@
   });
 
   itWeb3('ERC721UniqueExtensions support', async ({web3}) => {
-    expect(await contract(web3).methods.supportsInterface('0xe562194d').call()).to.be.true;
+    expect(await contract(web3).methods.supportsInterface('0xd74d154f').call()).to.be.true;
   });
 
   itWeb3('ERC721Burnable support', async ({web3}) => {

--- a/tests/src/eth/nonFungible.test.ts
+++ b/tests/src/eth/nonFungible.test.ts
@@ -15,7 +15,7 @@
 // along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
 
 import privateKey from '../substrate/privateKey';
-import {approveExpectSuccess, burnItemExpectSuccess, createCollectionExpectSuccess, createItemExpectSuccess, setVariableMetaDataExpectSuccess, transferExpectSuccess, transferFromExpectSuccess, UNIQUE, setMetadataUpdatePermissionFlagExpectSuccess} from '../util/helpers';
+import {approveExpectSuccess, burnItemExpectSuccess, createCollectionExpectSuccess, createItemExpectSuccess, transferExpectSuccess, transferFromExpectSuccess, UNIQUE} from '../util/helpers';
 import {collectionIdToAddress, createEthAccount, createEthAccountWithBalance, GAS_ARGS, itWeb3, normalizeEvents, recordEthFee, recordEvents, subToEth, transferBalanceToEth} from './util/helpers';
 import nonFungibleAbi from './nonFungibleAbi.json';
 import {expect} from 'chai';
@@ -331,41 +331,6 @@
       const balance = await contract.methods.balanceOf(receiver).call();
       expect(+balance).to.equal(1);
     }
-  });
-
-  itWeb3('Can perform getVariableMetadata', async ({web3, api}) => {
-    const collection = await createCollectionExpectSuccess({
-      mode: {type: 'NFT'},
-    });
-    const alice = privateKey('//Alice');
-
-    const owner = await createEthAccountWithBalance(api, web3);
-
-    const item = await createItemExpectSuccess(alice, collection, 'NFT', {Ethereum: owner});
-    await setMetadataUpdatePermissionFlagExpectSuccess(alice, collection, 'Admin');
-    await setVariableMetaDataExpectSuccess(alice, collection, item, [1, 2, 3]);
-
-    const address = collectionIdToAddress(collection);
-    const contract = new web3.eth.Contract(nonFungibleAbi as any, address, {from: owner, ...GAS_ARGS});
-
-    expect(await contract.methods.getVariableMetadata(item).call()).to.be.equal('0x010203');
-  });
-
-  itWeb3('Can perform setVariableMetadata', async ({web3, api}) => {
-    const collection = await createCollectionExpectSuccess({
-      mode: {type: 'NFT'},
-    });
-    const alice = privateKey('//Alice');
-
-    const owner = await createEthAccountWithBalance(api, web3);
-
-    const item = await createItemExpectSuccess(alice, collection, 'NFT', {Ethereum: owner});
-
-    const address = collectionIdToAddress(collection);
-    const contract = new web3.eth.Contract(nonFungibleAbi as any, address, {from: owner, ...GAS_ARGS});
-
-    expect(await contract.methods.setVariableMetadata(item, '0x010203').send({from: owner}));
-    expect(await contract.methods.getVariableMetadata(item).call()).to.be.equal('0x010203');
   });
 });
 

--- a/tests/src/eth/nonFungibleAbi.json
+++ b/tests/src/eth/nonFungibleAbi.json
@@ -1,614 +1,738 @@
 [
-    {
-        "anonymous": false,
-        "inputs": [
-            {
-                "indexed": true,
-                "internalType": "address",
-                "name": "owner",
-                "type": "address"
-            },
-            {
-                "indexed": true,
-                "internalType": "address",
-                "name": "approved",
-                "type": "address"
-            },
-            {
-                "indexed": true,
-                "internalType": "uint256",
-                "name": "tokenId",
-                "type": "uint256"
-            }
-        ],
-        "name": "Approval",
-        "type": "event"
-    },
-    {
-        "anonymous": false,
-        "inputs": [
-            {
-                "indexed": true,
-                "internalType": "address",
-                "name": "owner",
-                "type": "address"
-            },
-            {
-                "indexed": true,
-                "internalType": "address",
-                "name": "operator",
-                "type": "address"
-            },
-            {
-                "indexed": false,
-                "internalType": "bool",
-                "name": "approved",
-                "type": "bool"
-            }
-        ],
-        "name": "ApprovalForAll",
-        "type": "event"
-    },
-    {
-        "anonymous": false,
-        "inputs": [],
-        "name": "MintingFinished",
-        "type": "event"
-    },
-    {
-        "anonymous": false,
-        "inputs": [
-            {
-                "indexed": true,
-                "internalType": "address",
-                "name": "from",
-                "type": "address"
-            },
-            {
-                "indexed": true,
-                "internalType": "address",
-                "name": "to",
-                "type": "address"
-            },
-            {
-                "indexed": true,
-                "internalType": "uint256",
-                "name": "tokenId",
-                "type": "uint256"
-            }
-        ],
-        "name": "Transfer",
-        "type": "event"
-    },
-    {
-        "inputs": [
-            {
-                "internalType": "address",
-                "name": "approved",
-                "type": "address"
-            },
-            {
-                "internalType": "uint256",
-                "name": "tokenId",
-                "type": "uint256"
-            }
-        ],
-        "name": "approve",
-        "outputs": [],
-        "stateMutability": "nonpayable",
-        "type": "function"
-    },
-    {
-        "inputs": [
-            {
-                "internalType": "address",
-                "name": "owner",
-                "type": "address"
-            }
-        ],
-        "name": "balanceOf",
-        "outputs": [
-            {
-                "internalType": "uint256",
-                "name": "",
-                "type": "uint256"
-            }
-        ],
-        "stateMutability": "view",
-        "type": "function"
-    },
-    {
-        "inputs": [
-            {
-                "internalType": "uint256",
-                "name": "tokenId",
-                "type": "uint256"
-            }
-        ],
-        "name": "burn",
-        "outputs": [],
-        "stateMutability": "nonpayable",
-        "type": "function"
-    },
-    {
-        "inputs": [],
-        "name": "finishMinting",
-        "outputs": [
-            {
-                "internalType": "bool",
-                "name": "",
-                "type": "bool"
-            }
-        ],
-        "stateMutability": "nonpayable",
-        "type": "function"
-    },
-    {
-        "inputs": [
-            {
-                "internalType": "uint256",
-                "name": "tokenId",
-                "type": "uint256"
-            }
-        ],
-        "name": "getApproved",
-        "outputs": [
-            {
-                "internalType": "address",
-                "name": "",
-                "type": "address"
-            }
-        ],
-        "stateMutability": "view",
-        "type": "function"
-    },
-    {
-        "inputs": [
-            {
-                "internalType": "uint256",
-                "name": "tokenId",
-                "type": "uint256"
-            }
-        ],
-        "name": "getVariableMetadata",
-        "outputs": [
-            {
-                "internalType": "bytes",
-                "name": "",
-                "type": "bytes"
-            }
-        ],
-        "stateMutability": "view",
-        "type": "function"
-    },
-    {
-        "inputs": [
-            {
-                "internalType": "address",
-                "name": "owner",
-                "type": "address"
-            },
-            {
-                "internalType": "address",
-                "name": "operator",
-                "type": "address"
-            }
-        ],
-        "name": "isApprovedForAll",
-        "outputs": [
-            {
-                "internalType": "address",
-                "name": "",
-                "type": "address"
-            }
-        ],
-        "stateMutability": "view",
-        "type": "function"
-    },
-    {
-        "inputs": [
-            {
-                "internalType": "address",
-                "name": "to",
-                "type": "address"
-            },
-            {
-                "internalType": "uint256",
-                "name": "tokenId",
-                "type": "uint256"
-            }
-        ],
-        "name": "mint",
-        "outputs": [
-            {
-                "internalType": "bool",
-                "name": "",
-                "type": "bool"
-            }
-        ],
-        "stateMutability": "nonpayable",
-        "type": "function"
-    },
-    {
-        "inputs": [
-            {
-                "internalType": "address",
-                "name": "to",
-                "type": "address"
-            },
-            {
-                "internalType": "uint256[]",
-                "name": "tokenIds",
-                "type": "uint256[]"
-            }
-        ],
-        "name": "mintBulk",
-        "outputs": [
-            {
-                "internalType": "bool",
-                "name": "",
-                "type": "bool"
-            }
-        ],
-        "stateMutability": "nonpayable",
-        "type": "function"
-    },
-    {
-        "inputs": [
-            {
-                "internalType": "address",
-                "name": "to",
-                "type": "address"
-            },
-            {
-                "components": [
-                    {
-                        "internalType": "uint256",
-                        "name": "field_0",
-                        "type": "uint256"
-                    },
-                    {
-                        "internalType": "string",
-                        "name": "field_1",
-                        "type": "string"
-                    }
-                ],
-                "internalType": "struct Tuple0[]",
-                "name": "tokens",
-                "type": "tuple[]"
-            }
-        ],
-        "name": "mintBulkWithTokenURI",
-        "outputs": [
-            {
-                "internalType": "bool",
-                "name": "",
-                "type": "bool"
-            }
-        ],
-        "stateMutability": "nonpayable",
-        "type": "function"
-    },
-    {
-        "inputs": [
-            {
-                "internalType": "address",
-                "name": "to",
-                "type": "address"
-            },
-            {
-                "internalType": "uint256",
-                "name": "tokenId",
-                "type": "uint256"
-            },
-            {
-                "internalType": "string",
-                "name": "tokenUri",
-                "type": "string"
-            }
-        ],
-        "name": "mintWithTokenURI",
-        "outputs": [
-            {
-                "internalType": "bool",
-                "name": "",
-                "type": "bool"
-            }
-        ],
-        "stateMutability": "nonpayable",
-        "type": "function"
-    },
-    {
-        "inputs": [],
-        "name": "mintingFinished",
-        "outputs": [
-            {
-                "internalType": "bool",
-                "name": "",
-                "type": "bool"
-            }
-        ],
-        "stateMutability": "view",
-        "type": "function"
-    },
-    {
-        "inputs": [],
-        "name": "name",
-        "outputs": [
-            {
-                "internalType": "string",
-                "name": "",
-                "type": "string"
-            }
-        ],
-        "stateMutability": "view",
-        "type": "function"
-    },
-    {
-        "inputs": [],
-        "name": "nextTokenId",
-        "outputs": [
-            {
-                "internalType": "uint256",
-                "name": "",
-                "type": "uint256"
-            }
-        ],
-        "stateMutability": "view",
-        "type": "function"
-    },
-    {
-        "inputs": [
-            {
-                "internalType": "uint256",
-                "name": "tokenId",
-                "type": "uint256"
-            }
-        ],
-        "name": "ownerOf",
-        "outputs": [
-            {
-                "internalType": "address",
-                "name": "",
-                "type": "address"
-            }
-        ],
-        "stateMutability": "view",
-        "type": "function"
-    },
-    {
-        "inputs": [
-            {
-                "internalType": "address",
-                "name": "from",
-                "type": "address"
-            },
-            {
-                "internalType": "address",
-                "name": "to",
-                "type": "address"
-            },
-            {
-                "internalType": "uint256",
-                "name": "tokenId",
-                "type": "uint256"
-            }
-        ],
-        "name": "safeTransferFrom",
-        "outputs": [],
-        "stateMutability": "nonpayable",
-        "type": "function"
-    },
-    {
-        "inputs": [
-            {
-                "internalType": "address",
-                "name": "from",
-                "type": "address"
-            },
-            {
-                "internalType": "address",
-                "name": "to",
-                "type": "address"
-            },
-            {
-                "internalType": "uint256",
-                "name": "tokenId",
-                "type": "uint256"
-            },
-            {
-                "internalType": "bytes",
-                "name": "data",
-                "type": "bytes"
-            }
-        ],
-        "name": "safeTransferFromWithData",
-        "outputs": [],
-        "stateMutability": "nonpayable",
-        "type": "function"
-    },
-    {
-        "inputs": [
-            {
-                "internalType": "address",
-                "name": "operator",
-                "type": "address"
-            },
-            {
-                "internalType": "bool",
-                "name": "approved",
-                "type": "bool"
-            }
-        ],
-        "name": "setApprovalForAll",
-        "outputs": [],
-        "stateMutability": "nonpayable",
-        "type": "function"
-    },
-    {
-        "inputs": [
-            {
-                "internalType": "uint256",
-                "name": "tokenId",
-                "type": "uint256"
-            },
-            {
-                "internalType": "bytes",
-                "name": "data",
-                "type": "bytes"
-            }
-        ],
-        "name": "setVariableMetadata",
-        "outputs": [],
-        "stateMutability": "nonpayable",
-        "type": "function"
-    },
-    {
-        "inputs": [
-            {
-                "internalType": "bytes4",
-                "name": "interfaceId",
-                "type": "bytes4"
-            }
-        ],
-        "name": "supportsInterface",
-        "outputs": [
-            {
-                "internalType": "bool",
-                "name": "",
-                "type": "bool"
-            }
-        ],
-        "stateMutability": "view",
-        "type": "function"
-    },
-    {
-        "inputs": [],
-        "name": "symbol",
-        "outputs": [
-            {
-                "internalType": "string",
-                "name": "",
-                "type": "string"
-            }
-        ],
-        "stateMutability": "view",
-        "type": "function"
-    },
-    {
-        "inputs": [
-            {
-                "internalType": "uint256",
-                "name": "index",
-                "type": "uint256"
-            }
-        ],
-        "name": "tokenByIndex",
-        "outputs": [
-            {
-                "internalType": "uint256",
-                "name": "",
-                "type": "uint256"
-            }
-        ],
-        "stateMutability": "view",
-        "type": "function"
-    },
-    {
-        "inputs": [
-            {
-                "internalType": "address",
-                "name": "owner",
-                "type": "address"
-            },
-            {
-                "internalType": "uint256",
-                "name": "index",
-                "type": "uint256"
-            }
-        ],
-        "name": "tokenOfOwnerByIndex",
-        "outputs": [
-            {
-                "internalType": "uint256",
-                "name": "",
-                "type": "uint256"
-            }
-        ],
-        "stateMutability": "view",
-        "type": "function"
-    },
-    {
-        "inputs": [
-            {
-                "internalType": "uint256",
-                "name": "tokenId",
-                "type": "uint256"
-            }
-        ],
-        "name": "tokenURI",
-        "outputs": [
-            {
-                "internalType": "string",
-                "name": "",
-                "type": "string"
-            }
-        ],
-        "stateMutability": "view",
-        "type": "function"
-    },
-    {
-        "inputs": [],
-        "name": "totalSupply",
-        "outputs": [
-            {
-                "internalType": "uint256",
-                "name": "",
-                "type": "uint256"
-            }
-        ],
-        "stateMutability": "view",
-        "type": "function"
-    },
-    {
-        "inputs": [
-            {
-                "internalType": "address",
-                "name": "to",
-                "type": "address"
-            },
-            {
-                "internalType": "uint256",
-                "name": "tokenId",
-                "type": "uint256"
-            }
-        ],
-        "name": "transfer",
-        "outputs": [],
-        "stateMutability": "nonpayable",
-        "type": "function"
-    },
-    {
-        "inputs": [
-            {
-                "internalType": "address",
-                "name": "from",
-                "type": "address"
-            },
-            {
-                "internalType": "address",
-                "name": "to",
-                "type": "address"
-            },
-            {
-                "internalType": "uint256",
-                "name": "tokenId",
-                "type": "uint256"
-            }
-        ],
-        "name": "transferFrom",
-        "outputs": [],
-        "stateMutability": "nonpayable",
-        "type": "function"
-    }
-]
+	{
+		"anonymous": false,
+		"inputs": [
+			{
+				"indexed": true,
+				"internalType": "address",
+				"name": "owner",
+				"type": "address"
+			},
+			{
+				"indexed": true,
+				"internalType": "address",
+				"name": "approved",
+				"type": "address"
+			},
+			{
+				"indexed": true,
+				"internalType": "uint256",
+				"name": "tokenId",
+				"type": "uint256"
+			}
+		],
+		"name": "Approval",
+		"type": "event"
+	},
+	{
+		"anonymous": false,
+		"inputs": [
+			{
+				"indexed": true,
+				"internalType": "address",
+				"name": "owner",
+				"type": "address"
+			},
+			{
+				"indexed": true,
+				"internalType": "address",
+				"name": "operator",
+				"type": "address"
+			},
+			{
+				"indexed": false,
+				"internalType": "bool",
+				"name": "approved",
+				"type": "bool"
+			}
+		],
+		"name": "ApprovalForAll",
+		"type": "event"
+	},
+	{
+		"anonymous": false,
+		"inputs": [],
+		"name": "MintingFinished",
+		"type": "event"
+	},
+	{
+		"anonymous": false,
+		"inputs": [
+			{
+				"indexed": true,
+				"internalType": "address",
+				"name": "from",
+				"type": "address"
+			},
+			{
+				"indexed": true,
+				"internalType": "address",
+				"name": "to",
+				"type": "address"
+			},
+			{
+				"indexed": true,
+				"internalType": "uint256",
+				"name": "tokenId",
+				"type": "uint256"
+			}
+		],
+		"name": "Transfer",
+		"type": "event"
+	},
+	{
+		"inputs": [
+			{
+				"internalType": "address",
+				"name": "approved",
+				"type": "address"
+			},
+			{
+				"internalType": "uint256",
+				"name": "tokenId",
+				"type": "uint256"
+			}
+		],
+		"name": "approve",
+		"outputs": [],
+		"stateMutability": "nonpayable",
+		"type": "function"
+	},
+	{
+		"inputs": [
+			{
+				"internalType": "address",
+				"name": "owner",
+				"type": "address"
+			}
+		],
+		"name": "balanceOf",
+		"outputs": [
+			{
+				"internalType": "uint256",
+				"name": "",
+				"type": "uint256"
+			}
+		],
+		"stateMutability": "view",
+		"type": "function"
+	},
+	{
+		"inputs": [
+			{
+				"internalType": "uint256",
+				"name": "tokenId",
+				"type": "uint256"
+			}
+		],
+		"name": "burn",
+		"outputs": [],
+		"stateMutability": "nonpayable",
+		"type": "function"
+	},
+	{
+		"inputs": [
+			{
+				"internalType": "address",
+				"name": "from",
+				"type": "address"
+			},
+			{
+				"internalType": "uint256",
+				"name": "tokenId",
+				"type": "uint256"
+			}
+		],
+		"name": "burnFrom",
+		"outputs": [],
+		"stateMutability": "nonpayable",
+		"type": "function"
+	},
+	{
+		"inputs": [
+			{
+				"internalType": "string",
+				"name": "key",
+				"type": "string"
+			}
+		],
+		"name": "collectionProperty",
+		"outputs": [
+			{
+				"internalType": "bytes",
+				"name": "",
+				"type": "bytes"
+			}
+		],
+		"stateMutability": "view",
+		"type": "function"
+	},
+	{
+		"inputs": [
+			{
+				"internalType": "string",
+				"name": "key",
+				"type": "string"
+			}
+		],
+		"name": "deleteCollectionProperty",
+		"outputs": [],
+		"stateMutability": "nonpayable",
+		"type": "function"
+	},
+	{
+		"inputs": [
+			{
+				"internalType": "uint256",
+				"name": "tokenId",
+				"type": "uint256"
+			},
+			{
+				"internalType": "string",
+				"name": "key",
+				"type": "string"
+			}
+		],
+		"name": "deleteProperty",
+		"outputs": [],
+		"stateMutability": "nonpayable",
+		"type": "function"
+	},
+	{
+		"inputs": [],
+		"name": "finishMinting",
+		"outputs": [
+			{
+				"internalType": "bool",
+				"name": "",
+				"type": "bool"
+			}
+		],
+		"stateMutability": "nonpayable",
+		"type": "function"
+	},
+	{
+		"inputs": [
+			{
+				"internalType": "uint256",
+				"name": "tokenId",
+				"type": "uint256"
+			}
+		],
+		"name": "getApproved",
+		"outputs": [
+			{
+				"internalType": "address",
+				"name": "",
+				"type": "address"
+			}
+		],
+		"stateMutability": "view",
+		"type": "function"
+	},
+	{
+		"inputs": [
+			{
+				"internalType": "address",
+				"name": "owner",
+				"type": "address"
+			},
+			{
+				"internalType": "address",
+				"name": "operator",
+				"type": "address"
+			}
+		],
+		"name": "isApprovedForAll",
+		"outputs": [
+			{
+				"internalType": "address",
+				"name": "",
+				"type": "address"
+			}
+		],
+		"stateMutability": "view",
+		"type": "function"
+	},
+	{
+		"inputs": [
+			{
+				"internalType": "address",
+				"name": "to",
+				"type": "address"
+			},
+			{
+				"internalType": "uint256",
+				"name": "tokenId",
+				"type": "uint256"
+			}
+		],
+		"name": "mint",
+		"outputs": [
+			{
+				"internalType": "bool",
+				"name": "",
+				"type": "bool"
+			}
+		],
+		"stateMutability": "nonpayable",
+		"type": "function"
+	},
+	{
+		"inputs": [
+			{
+				"internalType": "address",
+				"name": "to",
+				"type": "address"
+			},
+			{
+				"internalType": "uint256[]",
+				"name": "tokenIds",
+				"type": "uint256[]"
+			}
+		],
+		"name": "mintBulk",
+		"outputs": [
+			{
+				"internalType": "bool",
+				"name": "",
+				"type": "bool"
+			}
+		],
+		"stateMutability": "nonpayable",
+		"type": "function"
+	},
+	{
+		"inputs": [
+			{
+				"internalType": "address",
+				"name": "to",
+				"type": "address"
+			},
+			{
+				"components": [
+					{
+						"internalType": "uint256",
+						"name": "field_0",
+						"type": "uint256"
+					},
+					{
+						"internalType": "string",
+						"name": "field_1",
+						"type": "string"
+					}
+				],
+				"internalType": "struct Tuple0[]",
+				"name": "tokens",
+				"type": "tuple[]"
+			}
+		],
+		"name": "mintBulkWithTokenURI",
+		"outputs": [
+			{
+				"internalType": "bool",
+				"name": "",
+				"type": "bool"
+			}
+		],
+		"stateMutability": "nonpayable",
+		"type": "function"
+	},
+	{
+		"inputs": [
+			{
+				"internalType": "address",
+				"name": "to",
+				"type": "address"
+			},
+			{
+				"internalType": "uint256",
+				"name": "tokenId",
+				"type": "uint256"
+			},
+			{
+				"internalType": "string",
+				"name": "tokenUri",
+				"type": "string"
+			}
+		],
+		"name": "mintWithTokenURI",
+		"outputs": [
+			{
+				"internalType": "bool",
+				"name": "",
+				"type": "bool"
+			}
+		],
+		"stateMutability": "nonpayable",
+		"type": "function"
+	},
+	{
+		"inputs": [],
+		"name": "mintingFinished",
+		"outputs": [
+			{
+				"internalType": "bool",
+				"name": "",
+				"type": "bool"
+			}
+		],
+		"stateMutability": "view",
+		"type": "function"
+	},
+	{
+		"inputs": [],
+		"name": "name",
+		"outputs": [
+			{
+				"internalType": "string",
+				"name": "",
+				"type": "string"
+			}
+		],
+		"stateMutability": "view",
+		"type": "function"
+	},
+	{
+		"inputs": [],
+		"name": "nextTokenId",
+		"outputs": [
+			{
+				"internalType": "uint256",
+				"name": "",
+				"type": "uint256"
+			}
+		],
+		"stateMutability": "view",
+		"type": "function"
+	},
+	{
+		"inputs": [
+			{
+				"internalType": "uint256",
+				"name": "tokenId",
+				"type": "uint256"
+			}
+		],
+		"name": "ownerOf",
+		"outputs": [
+			{
+				"internalType": "address",
+				"name": "",
+				"type": "address"
+			}
+		],
+		"stateMutability": "view",
+		"type": "function"
+	},
+	{
+		"inputs": [
+			{
+				"internalType": "uint256",
+				"name": "tokenId",
+				"type": "uint256"
+			},
+			{
+				"internalType": "string",
+				"name": "key",
+				"type": "string"
+			}
+		],
+		"name": "property",
+		"outputs": [
+			{
+				"internalType": "bytes",
+				"name": "",
+				"type": "bytes"
+			}
+		],
+		"stateMutability": "view",
+		"type": "function"
+	},
+	{
+		"inputs": [
+			{
+				"internalType": "address",
+				"name": "from",
+				"type": "address"
+			},
+			{
+				"internalType": "address",
+				"name": "to",
+				"type": "address"
+			},
+			{
+				"internalType": "uint256",
+				"name": "tokenId",
+				"type": "uint256"
+			}
+		],
+		"name": "safeTransferFrom",
+		"outputs": [],
+		"stateMutability": "nonpayable",
+		"type": "function"
+	},
+	{
+		"inputs": [
+			{
+				"internalType": "address",
+				"name": "from",
+				"type": "address"
+			},
+			{
+				"internalType": "address",
+				"name": "to",
+				"type": "address"
+			},
+			{
+				"internalType": "uint256",
+				"name": "tokenId",
+				"type": "uint256"
+			},
+			{
+				"internalType": "bytes",
+				"name": "data",
+				"type": "bytes"
+			}
+		],
+		"name": "safeTransferFromWithData",
+		"outputs": [],
+		"stateMutability": "nonpayable",
+		"type": "function"
+	},
+	{
+		"inputs": [
+			{
+				"internalType": "address",
+				"name": "operator",
+				"type": "address"
+			},
+			{
+				"internalType": "bool",
+				"name": "approved",
+				"type": "bool"
+			}
+		],
+		"name": "setApprovalForAll",
+		"outputs": [],
+		"stateMutability": "nonpayable",
+		"type": "function"
+	},
+	{
+		"inputs": [
+			{
+				"internalType": "string",
+				"name": "key",
+				"type": "string"
+			},
+			{
+				"internalType": "bytes",
+				"name": "value",
+				"type": "bytes"
+			}
+		],
+		"name": "setCollectionProperty",
+		"outputs": [],
+		"stateMutability": "nonpayable",
+		"type": "function"
+	},
+	{
+		"inputs": [
+			{
+				"internalType": "uint256",
+				"name": "tokenId",
+				"type": "uint256"
+			},
+			{
+				"internalType": "string",
+				"name": "key",
+				"type": "string"
+			},
+			{
+				"internalType": "bytes",
+				"name": "value",
+				"type": "bytes"
+			}
+		],
+		"name": "setProperty",
+		"outputs": [],
+		"stateMutability": "nonpayable",
+		"type": "function"
+	},
+	{
+		"inputs": [
+			{
+				"internalType": "string",
+				"name": "key",
+				"type": "string"
+			},
+			{
+				"internalType": "bool",
+				"name": "isMutable",
+				"type": "bool"
+			},
+			{
+				"internalType": "bool",
+				"name": "collectionAdmin",
+				"type": "bool"
+			},
+			{
+				"internalType": "bool",
+				"name": "tokenOwner",
+				"type": "bool"
+			}
+		],
+		"name": "setTokenPropertyPermission",
+		"outputs": [],
+		"stateMutability": "nonpayable",
+		"type": "function"
+	},
+	{
+		"inputs": [
+			{
+				"internalType": "bytes4",
+				"name": "interfaceID",
+				"type": "bytes4"
+			}
+		],
+		"name": "supportsInterface",
+		"outputs": [
+			{
+				"internalType": "bool",
+				"name": "",
+				"type": "bool"
+			}
+		],
+		"stateMutability": "view",
+		"type": "function"
+	},
+	{
+		"inputs": [],
+		"name": "symbol",
+		"outputs": [
+			{
+				"internalType": "string",
+				"name": "",
+				"type": "string"
+			}
+		],
+		"stateMutability": "view",
+		"type": "function"
+	},
+	{
+		"inputs": [
+			{
+				"internalType": "uint256",
+				"name": "index",
+				"type": "uint256"
+			}
+		],
+		"name": "tokenByIndex",
+		"outputs": [
+			{
+				"internalType": "uint256",
+				"name": "",
+				"type": "uint256"
+			}
+		],
+		"stateMutability": "view",
+		"type": "function"
+	},
+	{
+		"inputs": [
+			{
+				"internalType": "address",
+				"name": "owner",
+				"type": "address"
+			},
+			{
+				"internalType": "uint256",
+				"name": "index",
+				"type": "uint256"
+			}
+		],
+		"name": "tokenOfOwnerByIndex",
+		"outputs": [
+			{
+				"internalType": "uint256",
+				"name": "",
+				"type": "uint256"
+			}
+		],
+		"stateMutability": "view",
+		"type": "function"
+	},
+	{
+		"inputs": [
+			{
+				"internalType": "uint256",
+				"name": "tokenId",
+				"type": "uint256"
+			}
+		],
+		"name": "tokenURI",
+		"outputs": [
+			{
+				"internalType": "string",
+				"name": "",
+				"type": "string"
+			}
+		],
+		"stateMutability": "view",
+		"type": "function"
+	},
+	{
+		"inputs": [],
+		"name": "totalSupply",
+		"outputs": [
+			{
+				"internalType": "uint256",
+				"name": "",
+				"type": "uint256"
+			}
+		],
+		"stateMutability": "view",
+		"type": "function"
+	},
+	{
+		"inputs": [
+			{
+				"internalType": "address",
+				"name": "to",
+				"type": "address"
+			},
+			{
+				"internalType": "uint256",
+				"name": "tokenId",
+				"type": "uint256"
+			}
+		],
+		"name": "transfer",
+		"outputs": [],
+		"stateMutability": "nonpayable",
+		"type": "function"
+	},
+	{
+		"inputs": [
+			{
+				"internalType": "address",
+				"name": "from",
+				"type": "address"
+			},
+			{
+				"internalType": "address",
+				"name": "to",
+				"type": "address"
+			},
+			{
+				"internalType": "uint256",
+				"name": "tokenId",
+				"type": "uint256"
+			}
+		],
+		"name": "transferFrom",
+		"outputs": [],
+		"stateMutability": "nonpayable",
+		"type": "function"
+	}
+]
\ No newline at end of file