git.delta.rocks / unique-network / refs/commits / 2e3c4de7682f

--- a/.maintain/scripts/generate_sol.sh
+++ b/.maintain/scripts/generate_sol.sh
@@ -11,4 +11,6 @@
 formatted=$(mktemp)
 prettier --config $PRETTIER_CONFIG $raw > $formatted
 
+sed -i -E -e "s/.+\/\/ FORMATTING: FORCE NEWLINE//g" $formatted
+
 mv $formatted $OUTPUT

--- a/crates/evm-coder/procedural/src/solidity_interface.rs
+++ b/crates/evm-coder/procedural/src/solidity_interface.rs
@@ -291,22 +291,40 @@
 
 struct MethodInfo {
 	rename_selector: Option<String>,
+	hide: bool,
 }
 impl Parse for MethodInfo {
 	fn parse(input: ParseStream) -> syn::Result<Self> {
 		let mut rename_selector = None;
-		let lookahead = input.lookahead1();
-		if lookahead.peek(kw::rename_selector) {
-			let k = input.parse::<kw::rename_selector>()?;
-			input.parse::<Token![=]>()?;
-			if rename_selector
-				.replace(input.parse::<LitStr>()?.value())
-				.is_some()
-			{
-				return Err(syn::Error::new(k.span(), "rename_selector is already set"));
+		let mut hide = false;
+		while !input.is_empty() {
+			let lookahead = input.lookahead1();
+			if lookahead.peek(kw::rename_selector) {
+				let k = input.parse::<kw::rename_selector>()?;
+				input.parse::<Token![=]>()?;
+				if rename_selector
+					.replace(input.parse::<LitStr>()?.value())
+					.is_some()
+				{
+					return Err(syn::Error::new(k.span(), "rename_selector is already set"));
+				}
+			} else if lookahead.peek(kw::hide) {
+				input.parse::<kw::hide>()?;
+				hide = true;
+			} else {
+				return Err(lookahead.error());
+			}
+
+			if input.peek(Token![,]) {
+				input.parse::<Token![,]>()?;
+			} else if !input.is_empty() {
+				return Err(syn::Error::new(input.span(), "expected end"));
 			}
 		}
-		Ok(Self { rename_selector })
+		Ok(Self {
+			rename_selector,
+			hide,
+		})
 	}
 }
 
@@ -548,6 +566,7 @@
 	syn::custom_keyword!(expect_selector);
 
 	syn::custom_keyword!(rename_selector);
+	syn::custom_keyword!(hide);
 }
 
 /// Rust methods are parsed into this structure when Solidity code is generated
@@ -558,6 +577,7 @@
 	screaming_name: Ident,
 	selector_str: String,
 	selector: u32,
+	hide: bool,
 	args: Vec<MethodArg>,
 	has_normal_args: bool,
 	has_value_args: bool,
@@ -570,6 +590,7 @@
 	fn try_from(value: &ImplItemMethod) -> syn::Result<Self> {
 		let mut info = MethodInfo {
 			rename_selector: None,
+			hide: false,
 		};
 		let mut docs = Vec::new();
 		let mut weight = None;
@@ -667,6 +688,7 @@
 			screaming_name: snake_ident_to_screaming(ident),
 			selector_str,
 			selector,
+			hide: info.hide,
 			args,
 			has_normal_args,
 			has_value_args,
@@ -826,12 +848,14 @@
 		let docs = &self.docs;
 		let selector_str = &self.selector_str;
 		let selector = self.selector;
+		let hide = self.hide;
 		let is_payable = self.has_value_args;
 		quote! {
 			SolidityFunction {
 				docs: &[#(#docs),*],
 				selector_str: #selector_str,
 				selector: #selector,
+				hide: #hide,
 				name: #camel_name,
 				mutability: #mutability,
 				is_payable: #is_payable,

--- a/crates/evm-coder/src/solidity.rs
+++ b/crates/evm-coder/src/solidity.rs
@@ -225,7 +225,7 @@
 
 pub trait SolidityArguments {
 	fn solidity_name(&self, writer: &mut impl fmt::Write, tc: &TypeCollector) -> fmt::Result;
-	fn solidity_get(&self, writer: &mut impl fmt::Write) -> fmt::Result;
+	fn solidity_get(&self, prefix: &str, writer: &mut impl fmt::Write) -> fmt::Result;
 	fn solidity_default(&self, writer: &mut impl fmt::Write, tc: &TypeCollector) -> fmt::Result;
 	fn is_empty(&self) -> bool {
 		self.len() == 0
@@ -248,7 +248,7 @@
 			Ok(())
 		}
 	}
-	fn solidity_get(&self, _writer: &mut impl fmt::Write) -> fmt::Result {
+	fn solidity_get(&self, _prefix: &str, _writer: &mut impl fmt::Write) -> fmt::Result {
 		Ok(())
 	}
 	fn solidity_default(&self, writer: &mut impl fmt::Write, tc: &TypeCollector) -> fmt::Result {
@@ -283,8 +283,8 @@
 			Ok(())
 		}
 	}
-	fn solidity_get(&self, writer: &mut impl fmt::Write) -> fmt::Result {
-		writeln!(writer, "\t\t{};", self.0)
+	fn solidity_get(&self, prefix: &str, writer: &mut impl fmt::Write) -> fmt::Result {
+		writeln!(writer, "\t{prefix}\t{};", self.0)
 	}
 	fn solidity_default(&self, writer: &mut impl fmt::Write, tc: &TypeCollector) -> fmt::Result {
 		T::solidity_default(writer, tc)
@@ -318,8 +318,8 @@
 			Ok(())
 		}
 	}
-	fn solidity_get(&self, writer: &mut impl fmt::Write) -> fmt::Result {
-		writeln!(writer, "\t\t{};", self.1)
+	fn solidity_get(&self, prefix: &str, writer: &mut impl fmt::Write) -> fmt::Result {
+		writeln!(writer, "\t{prefix}\t{};", self.1)
 	}
 	fn solidity_default(&self, writer: &mut impl fmt::Write, tc: &TypeCollector) -> fmt::Result {
 		T::solidity_default(writer, tc)
@@ -337,7 +337,7 @@
 	fn solidity_name(&self, _writer: &mut impl fmt::Write, _tc: &TypeCollector) -> fmt::Result {
 		Ok(())
 	}
-	fn solidity_get(&self, _writer: &mut impl fmt::Write) -> fmt::Result {
+	fn solidity_get(&self, _prefix: &str, _writer: &mut impl fmt::Write) -> fmt::Result {
 		Ok(())
 	}
 	fn solidity_default(&self, _writer: &mut impl fmt::Write, _tc: &TypeCollector) -> fmt::Result {
@@ -365,9 +365,9 @@
         )* );
 		Ok(())
 	}
-	fn solidity_get(&self, writer: &mut impl fmt::Write) -> fmt::Result {
+	fn solidity_get(&self, prefix: &str, writer: &mut impl fmt::Write) -> fmt::Result {
 		for_tuples!( #(
-            Tuple.solidity_get(writer)?;
+            Tuple.solidity_get(prefix, writer)?;
         )* );
 		Ok(())
 	}
@@ -418,6 +418,7 @@
 	pub docs: &'static [&'static str],
 	pub selector_str: &'static str,
 	pub selector: u32,
+	pub hide: bool,
 	pub name: &'static str,
 	pub args: A,
 	pub result: R,
@@ -431,16 +432,21 @@
 		writer: &mut impl fmt::Write,
 		tc: &TypeCollector,
 	) -> fmt::Result {
+		let hide_comment = self.hide.then(|| "// ").unwrap_or("");
 		for doc in self.docs {
-			writeln!(writer, "\t///{}", doc)?;
+			writeln!(writer, "\t{hide_comment}///{}", doc)?;
 		}
 		writeln!(
 			writer,
-			"\t/// @dev EVM selector for this function is: 0x{:0>8x},",
+			"\t{hide_comment}/// @dev EVM selector for this function is: 0x{:0>8x},",
 			self.selector
 		)?;
-		writeln!(writer, "\t///  or in textual repr: {}", self.selector_str)?;
-		write!(writer, "\tfunction {}(", self.name)?;
+		writeln!(
+			writer,
+			"\t{hide_comment}///  or in textual repr: {}",
+			self.selector_str
+		)?;
+		write!(writer, "\t{hide_comment}function {}(", self.name)?;
 		self.args.solidity_name(writer, tc)?;
 		write!(writer, ")")?;
 		if is_impl {
@@ -463,22 +469,25 @@
 		}
 		if is_impl {
 			writeln!(writer, " {{")?;
-			writeln!(writer, "\t\trequire(false, stub_error);")?;
-			self.args.solidity_get(writer)?;
+			writeln!(writer, "\t{hide_comment}\trequire(false, stub_error);")?;
+			self.args.solidity_get(hide_comment, writer)?;
 			match &self.mutability {
 				SolidityMutability::Pure => {}
-				SolidityMutability::View => writeln!(writer, "\t\tdummy;")?,
-				SolidityMutability::Mutable => writeln!(writer, "\t\tdummy = 0;")?,
+				SolidityMutability::View => writeln!(writer, "\t{hide_comment}\tdummy;")?,
+				SolidityMutability::Mutable => writeln!(writer, "\t{hide_comment}\tdummy = 0;")?,
 			}
 			if !self.result.is_empty() {
-				write!(writer, "\t\treturn ")?;
+				write!(writer, "\t{hide_comment}\treturn ")?;
 				self.result.solidity_default(writer, tc)?;
 				writeln!(writer, ";")?;
 			}
-			writeln!(writer, "\t}}")?;
+			writeln!(writer, "\t{hide_comment}}}")?;
 		} else {
 			writeln!(writer, ";")?;
 		}
+		if self.hide {
+			writeln!(writer, "// FORMATTING: FORCE NEWLINE")?;
+		}
 		Ok(())
 	}
 }

--- a/pallets/common/src/dispatch.rs
+++ b/pallets/common/src/dispatch.rs
@@ -9,7 +9,7 @@
 	traits::Get,
 };
 use sp_runtime::DispatchError;
-use up_data_structs::{CollectionId, CreateCollectionData};
+use up_data_structs::{CollectionId, CreateCollectionData, CollectionFlags};
 
 use crate::{pallet::Config, CommonCollectionOperations, CollectionHandle};
 
@@ -80,6 +80,7 @@
 		sender: T::CrossAccountId,
 		payer: T::CrossAccountId,
 		data: CreateCollectionData<T::AccountId>,
+		flags: CollectionFlags,
 	) -> Result<CollectionId, DispatchError>;
 
 	/// Delete the collection.

--- a/pallets/common/src/erc.rs
+++ b/pallets/common/src/erc.rs
@@ -592,6 +592,7 @@
 	///
 	/// @dev Owner can be changed only by current owner
 	/// @param newOwner new owner account
+	#[solidity(rename_selector = "changeCollectionOwner")]
 	fn set_owner(&mut self, caller: caller, new_owner: address) -> Result<void> {
 		self.consume_store_writes(1)?;
 
@@ -659,11 +660,6 @@
 	/// Keys.
 	pub mod key {
 		use super::*;
-
-		/// Key "schemaName".
-		pub fn schema_name() -> up_data_structs::PropertyKey {
-			property_key_from_bytes(b"schemaName").expect(EXPECT_CONVERT_ERROR)
-		}
 
 		/// Key "baseURI".
 		pub fn base_uri() -> up_data_structs::PropertyKey {
@@ -672,30 +668,17 @@
 
 		/// Key "url".
 		pub fn url() -> up_data_structs::PropertyKey {
-			property_key_from_bytes(b"url").expect(EXPECT_CONVERT_ERROR)
+			property_key_from_bytes(b"URI").expect(EXPECT_CONVERT_ERROR)
 		}
 
 		/// Key "suffix".
 		pub fn suffix() -> up_data_structs::PropertyKey {
-			property_key_from_bytes(b"suffix").expect(EXPECT_CONVERT_ERROR)
+			property_key_from_bytes(b"URISuffix").expect(EXPECT_CONVERT_ERROR)
 		}
 
 		/// Key "parentNft".
 		pub fn parent_nft() -> up_data_structs::PropertyKey {
 			property_key_from_bytes(b"parentNft").expect(EXPECT_CONVERT_ERROR)
-		}
-	}
-
-	/// Values.
-	pub mod value {
-		use super::*;
-
-		/// Value "ERC721Metadata".
-		pub const ERC721_METADATA: &[u8] = b"ERC721Metadata";
-
-		/// Value for [`ERC721_METADATA`].
-		pub fn erc721() -> up_data_structs::PropertyValue {
-			property_value_from_bytes(ERC721_METADATA).expect(EXPECT_CONVERT_ERROR)
 		}
 	}
 

--- a/pallets/common/src/lib.rs
+++ b/pallets/common/src/lib.rs
@@ -71,6 +71,7 @@
 	Collection,
 	RpcCollection,
 	CollectionFlags,
+	RpcCollectionFlags,
 	CollectionId,
 	CreateItemData,
 	MAX_TOKEN_PREFIX_LENGTH,
@@ -824,7 +825,11 @@
 			token_property_permissions,
 			properties,
 			read_only: flags.external,
-			foreign: flags.foreign,
+
+			flags: RpcCollectionFlags {
+				foreign: flags.foreign,
+				erc721metadata: flags.erc721metadata,
+			},
 		})
 	}
 }

binary blob — no preview

--- a/pallets/fungible/src/lib.rs
+++ b/pallets/fungible/src/lib.rs
@@ -212,8 +212,9 @@
 		owner: T::CrossAccountId,
 		payer: T::CrossAccountId,
 		data: CreateCollectionData<T::AccountId>,
+		flags: CollectionFlags,
 	) -> Result<CollectionId, DispatchError> {
-		<PalletCommon<T>>::init_collection(owner, payer, data, CollectionFlags::default())
+		<PalletCommon<T>>::init_collection(owner, payer, data, flags)
 	}
 
 	/// Initializes the collection with ForeignCollection flag. Returns [CollectionId] on success, [DispatchError] otherwise.

binary blob — no preview

--- a/pallets/fungible/src/stubs/UniqueFungible.sol
+++ b/pallets/fungible/src/stubs/UniqueFungible.sol
@@ -18,7 +18,7 @@
 }
 
 /// @title A contract that allows you to work with collections.
-/// @dev the ERC-165 identifier for this interface is 0x3e1e8083
+/// @dev the ERC-165 identifier for this interface is 0x62e22290
 contract Collection is Dummy, ERC165 {
 	/// Set collection property.
 	///
@@ -296,9 +296,9 @@
 	///
 	/// @dev Owner can be changed only by current owner
 	/// @param newOwner new owner account
-	/// @dev EVM selector for this function is: 0x13af4035,
-	///  or in textual repr: setOwner(address)
-	function setOwner(address newOwner) public {
+	/// @dev EVM selector for this function is: 0x4f53e226,
+	///  or in textual repr: changeCollectionOwner(address)
+	function changeCollectionOwner(address newOwner) public {
 		require(false, stub_error);
 		newOwner;
 		dummy = 0;

--- a/pallets/nonfungible/src/benchmarking.rs
+++ b/pallets/nonfungible/src/benchmarking.rs
@@ -55,7 +55,7 @@
 		owner,
 		CollectionMode::NFT,
 		|owner: T::CrossAccountId, data| {
-			<Pallet<T>>::init_collection(owner.clone(), owner, data, true)
+			<Pallet<T>>::init_collection(owner.clone(), owner, data, Default::default())
 		},
 		NonfungibleHandle::cast,
 	)

--- a/pallets/nonfungible/src/erc.rs
+++ b/pallets/nonfungible/src/erc.rs
@@ -33,16 +33,12 @@
 use pallet_evm_coder_substrate::dispatch_to_evm;
 use sp_std::vec::Vec;
 use pallet_common::{
-	erc::{
-		CommonEvmHandler, PrecompileResult, CollectionCall,
-		static_property::{key, value as property_value},
-	},
+	erc::{CommonEvmHandler, PrecompileResult, CollectionCall, static_property::key},
 	CollectionHandle, CollectionPropertyPermissions,
 };
 use pallet_evm::{account::CrossAccountId, PrecompileHandle};
 use pallet_evm_coder_substrate::call;
 use pallet_structure::{SelfWeightOf as StructureWeight, weights::WeightInfo as _};
-use alloc::string::ToString;
 
 use crate::{
 	AccountBalance, Config, CreateItemData, NonfungibleHandle, Pallet, TokenData, TokensMinted,
@@ -194,7 +190,7 @@
 }
 
 #[derive(ToLog)]
-pub enum ERC721MintableEvents {
+pub enum ERC721UniqueMintableEvents {
 	#[allow(dead_code)]
 	MintingFinished {},
 }
@@ -204,15 +200,17 @@
 #[solidity_interface(name = ERC721Metadata, expect_selector = 0x5b5e139f)]
 impl<T: Config> NonfungibleHandle<T> {
 	/// @notice A descriptive name for a collection of NFTs in this contract
-	fn name(&self) -> Result<string> {
-		Ok(decode_utf16(self.name.iter().copied())
-			.map(|r| r.unwrap_or(REPLACEMENT_CHARACTER))
-			.collect::<string>())
+	/// @dev real implementation of this function lies in `ERC721UniqueExtensions`
+	#[solidity(hide, rename_selector = "name")]
+	fn name_proxy(&self) -> Result<string> {
+		self.name()
 	}
 
 	/// @notice An abbreviated name for NFTs in this contract
-	fn symbol(&self) -> Result<string> {
-		Ok(string::from_utf8_lossy(&self.token_prefix).into())
+	/// @dev real implementation of this function lies in `ERC721UniqueExtensions`
+	#[solidity(hide, rename_selector = "symbol")]
+	fn symbol_proxy(&self) -> Result<string> {
+		self.symbol()
 	}
 
 	/// @notice A distinct Uniform Resource Identifier (URI) for a given asset.
@@ -228,35 +226,38 @@
 	fn token_uri(&self, token_id: uint256) -> Result<string> {
 		let token_id_u32: u32 = token_id.try_into().map_err(|_| "token id overflow")?;
 
-		if let Ok(url) = get_token_property(self, token_id_u32, &key::url()) {
-			if !url.is_empty() {
-				return Ok(url);
+		match get_token_property(self, token_id_u32, &key::url()).as_deref() {
+			Err(_) | Ok("") => (),
+			Ok(url) => {
+				return Ok(url.into());
 			}
-		} else if !is_erc721_metadata_compatible::<T>(self.id) {
-			return Err("tokenURI not set".into());
-		}
+		};
 
-		if let Some(base_uri) =
+		let base_uri =
 			pallet_common::Pallet::<T>::get_collection_property(self.id, &key::base_uri())
-		{
-			if !base_uri.is_empty() {
-				let base_uri = string::from_utf8(base_uri.into_inner()).map_err(|e| {
+				.map(BoundedVec::into_inner)
+				.map(string::from_utf8)
+				.transpose()
+				.map_err(|e| {
 					Error::Revert(alloc::format!(
 						"Can not convert value \"baseURI\" to string with error \"{}\"",
 						e
 					))
 				})?;
-				if let Ok(suffix) = get_token_property(self, token_id_u32, &key::suffix()) {
-					if !suffix.is_empty() {
-						return Ok(base_uri + suffix.as_str());
-					}
-				}
 
-				return Ok(base_uri + token_id.to_string().as_str());
+		let base_uri = match base_uri.as_deref() {
+			None | Some("") => {
+				return Ok("".into());
 			}
-		}
+			Some(base_uri) => base_uri.into(),
+		};
 
-		Ok("".into())
+		Ok(
+			match get_token_property(self, token_id_u32, &key::suffix()).as_deref() {
+				Err(_) | Ok("") => base_uri,
+				Ok(suffix) => base_uri + suffix,
+			},
+		)
 	}
 }
 
@@ -427,19 +428,33 @@
 }
 
 /// @title ERC721 minting logic.
-#[solidity_interface(name = ERC721Mintable, events(ERC721MintableEvents))]
+#[solidity_interface(name = ERC721UniqueMintable, events(ERC721UniqueMintableEvents))]
 impl<T: Config> NonfungibleHandle<T> {
 	fn minting_finished(&self) -> Result<bool> {
 		Ok(false)
 	}
 
 	/// @notice Function to mint token.
+	/// @param to The new owner
+	/// @return uint256 The id of the newly minted token
+	#[weight(<SelfWeightOf<T>>::create_item())]
+	fn mint(&mut self, caller: caller, to: address) -> Result<uint256> {
+		let token_id: uint256 = <TokensMinted<T>>::get(self.id)
+			.checked_add(1)
+			.ok_or("item id overflow")?
+			.into();
+		self.mint_check_id(caller, to, token_id)?;
+		Ok(token_id)
+	}
+
+	/// @notice Function to mint token.
 	/// @dev `tokenId` should be obtained with `nextTokenId` method,
 	///  unlike standard, you can't specify it manually
 	/// @param to The new owner
 	/// @param tokenId ID of the minted NFT
+	#[solidity(hide, rename_selector = "mint")]
 	#[weight(<SelfWeightOf<T>>::create_item())]
-	fn mint(&mut self, caller: caller, to: address, token_id: uint256) -> Result<bool> {
+	fn mint_check_id(&mut self, caller: caller, to: address, token_id: uint256) -> Result<bool> {
 		let caller = T::CrossAccountId::from_eth(caller);
 		let to = T::CrossAccountId::from_eth(to);
 		let token_id: u32 = token_id.try_into()?;
@@ -470,14 +485,34 @@
 	}
 
 	/// @notice Function to mint token with the given tokenUri.
+	/// @param to The new owner
+	/// @param tokenUri Token URI that would be stored in the NFT properties
+	/// @return uint256 The id of the newly minted token
+	#[solidity(rename_selector = "mintWithTokenURI")]
+	#[weight(<SelfWeightOf<T>>::create_item())]
+	fn mint_with_token_uri(
+		&mut self,
+		caller: caller,
+		to: address,
+		token_uri: string,
+	) -> Result<uint256> {
+		let token_id: uint256 = <TokensMinted<T>>::get(self.id)
+			.checked_add(1)
+			.ok_or("item id overflow")?
+			.into();
+		self.mint_with_token_uri_check_id(caller, to, token_id, token_uri)?;
+		Ok(token_id)
+	}
+
+	/// @notice Function to mint token with the given tokenUri.
 	/// @dev `tokenId` should be obtained with `nextTokenId` method,
 	///  unlike standard, you can't specify it manually
 	/// @param to The new owner
 	/// @param tokenId ID of the minted NFT
 	/// @param tokenUri Token URI that would be stored in the NFT properties
-	#[solidity(rename_selector = "mintWithTokenURI")]
+	#[solidity(hide, rename_selector = "mintWithTokenURI")]
 	#[weight(<SelfWeightOf<T>>::create_item())]
-	fn mint_with_token_uri(
+	fn mint_with_token_uri_check_id(
 		&mut self,
 		caller: caller,
 		to: address,
@@ -550,17 +585,6 @@
 	Err("Property tokenURI not found".into())
 }
 
-fn is_erc721_metadata_compatible<T: Config>(collection_id: CollectionId) -> bool {
-	if let Some(shema_name) =
-		pallet_common::Pallet::<T>::get_collection_property(collection_id, &key::schema_name())
-	{
-		let shema_name = shema_name.into_inner();
-		shema_name == property_value::ERC721_METADATA
-	} else {
-		false
-	}
-}
-
 fn get_token_permission<T: Config>(
 	collection_id: CollectionId,
 	key: &PropertyKey,
@@ -575,21 +599,23 @@
 			Error::Revert(alloc::format!("No permission for key {}", key))
 		})?;
 	Ok(a)
-}
-
-fn has_token_permission<T: Config>(collection_id: CollectionId, key: &PropertyKey) -> bool {
-	if let Ok(token_property_permissions) =
-		CollectionPropertyPermissions::<T>::try_get(collection_id)
-	{
-		return token_property_permissions.contains_key(key);
-	}
-
-	false
 }
 
 /// @title Unique extensions for ERC721.
 #[solidity_interface(name = ERC721UniqueExtensions)]
 impl<T: Config> NonfungibleHandle<T> {
+	/// @notice A descriptive name for a collection of NFTs in this contract
+	fn name(&self) -> Result<string> {
+		Ok(decode_utf16(self.name.iter().copied())
+			.map(|r| r.unwrap_or(REPLACEMENT_CHARACTER))
+			.collect::<string>())
+	}
+
+	/// @notice An abbreviated name for NFTs in this contract
+	fn symbol(&self) -> Result<string> {
+		Ok(string::from_utf8_lossy(&self.token_prefix).into())
+	}
+
 	/// @notice Transfer ownership of an NFT
 	/// @dev Throws unless `msg.sender` is the current owner. Throws if `to`
 	///  is the zero address. Throws if `tokenId` is not a valid NFT.
@@ -642,6 +668,7 @@
 	///  should be obtained with `nextTokenId` method
 	/// @param to The new owner
 	/// @param tokenIds IDs of the minted NFTs
+	// #[solidity(hide)]
 	#[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);
@@ -678,7 +705,7 @@
 	///  numbers and first number should be obtained with `nextTokenId` method
 	/// @param to The new owner
 	/// @param tokens array of pairs of token ID and token URI for minted tokens
-	#[solidity(rename_selector = "mintBulkWithTokenURI")]
+	#[solidity(/*hide,*/ rename_selector = "mintBulkWithTokenURI")]
 	#[weight(<SelfWeightOf<T>>::create_multiple_items(tokens.len() as u32))]
 	fn mint_bulk_with_token_uri(
 		&mut self,
@@ -731,11 +758,11 @@
 	name = UniqueNFT,
 	is(
 		ERC721,
-		ERC721Metadata,
 		ERC721Enumerable,
 		ERC721UniqueExtensions,
-		ERC721Mintable,
+		ERC721UniqueMintable,
 		ERC721Burnable,
+		ERC721Metadata(if(this.flags.erc721metadata)),
 		Collection(via(common_mut returns CollectionHandle<T>)),
 		TokenProperties,
 	)

--- a/pallets/nonfungible/src/lib.rs
+++ b/pallets/nonfungible/src/lib.rs
@@ -295,6 +295,7 @@
 		&mut self.0
 	}
 }
+
 impl<T: Config> WithRecorder<T> for NonfungibleHandle<T> {
 	fn recorder(&self) -> &SubstrateRecorder<T> {
 		self.0.recorder()
@@ -407,17 +408,9 @@
 		owner: T::CrossAccountId,
 		payer: T::CrossAccountId,
 		data: CreateCollectionData<T::AccountId>,
-		is_external: bool,
+		flags: CollectionFlags,
 	) -> Result<CollectionId, DispatchError> {
-		<PalletCommon<T>>::init_collection(
-			owner,
-			payer,
-			data,
-			CollectionFlags {
-				external: is_external,
-				..Default::default()
-			},
-		)
+		<PalletCommon<T>>::init_collection(owner, payer, data, flags)
 	}
 
 	/// Destroy NFT collection

binary blob — no preview

--- a/pallets/nonfungible/src/stubs/UniqueNFT.sol
+++ b/pallets/nonfungible/src/stubs/UniqueNFT.sol
@@ -91,7 +91,7 @@
 }
 
 /// @title A contract that allows you to work with collections.
-/// @dev the ERC-165 identifier for this interface is 0x3e1e8083
+/// @dev the ERC-165 identifier for this interface is 0x62e22290
 contract Collection is Dummy, ERC165 {
 	/// Set collection property.
 	///
@@ -369,9 +369,9 @@
 	///
 	/// @dev Owner can be changed only by current owner
 	/// @param newOwner new owner account
-	/// @dev EVM selector for this function is: 0x13af4035,
-	///  or in textual repr: setOwner(address)
-	function setOwner(address newOwner) public {
+	/// @dev EVM selector for this function is: 0x4f53e226,
+	///  or in textual repr: changeCollectionOwner(address)
+	function changeCollectionOwner(address newOwner) public {
 		require(false, stub_error);
 		newOwner;
 		dummy = 0;
@@ -384,6 +384,49 @@
 	uint256 field_1;
 }
 
+/// @title ERC-721 Non-Fungible Token Standard, optional metadata extension
+/// @dev See https://eips.ethereum.org/EIPS/eip-721
+/// @dev the ERC-165 identifier for this interface is 0x5b5e139f
+contract ERC721Metadata is Dummy, ERC165 {
+	// /// @notice A descriptive name for a collection of NFTs in this contract
+	// /// @dev real implementation of this function lies in `ERC721UniqueExtensions`
+	// /// @dev EVM selector for this function is: 0x06fdde03,
+	// ///  or in textual repr: name()
+	// function name() public view returns (string memory) {
+	// 	require(false, stub_error);
+	// 	dummy;
+	// 	return "";
+	// }
+
+	// /// @notice An abbreviated name for NFTs in this contract
+	// /// @dev real implementation of this function lies in `ERC721UniqueExtensions`
+	// /// @dev EVM selector for this function is: 0x95d89b41,
+	// ///  or in textual repr: symbol()
+	// function symbol() public view returns (string memory) {
+	// 	require(false, stub_error);
+	// 	dummy;
+	// 	return "";
+	// }
+
+	/// @notice A distinct Uniform Resource Identifier (URI) for a given asset.
+	///
+	/// @dev If the token has a `url` property and it is not empty, it is returned.
+	///  Else If the collection does not have a property with key `schemaName` or its value is not equal to `ERC721Metadata`, it return an error `tokenURI not set`.
+	///  If the collection property `baseURI` is empty or absent, return "" (empty string)
+	///  otherwise, if token property `suffix` present and is non-empty, return concatenation of baseURI and suffix
+	///  otherwise, return concatenation of `baseURI` and stringified token id (decimal stringifying, without paddings).
+	///
+	/// @return token's const_metadata
+	/// @dev EVM selector for this function is: 0xc87b56dd,
+	///  or in textual repr: tokenURI(uint256)
+	function tokenURI(uint256 tokenId) public view returns (string memory) {
+		require(false, stub_error);
+		tokenId;
+		dummy;
+		return "";
+	}
+}
+
 /// @title ERC721 Token that can be irreversibly burned (destroyed).
 /// @dev the ERC-165 identifier for this interface is 0x42966c68
 contract ERC721Burnable is Dummy, ERC165 {
@@ -401,13 +444,13 @@
 }
 
 /// @dev inlined interface
-contract ERC721MintableEvents {
+contract ERC721UniqueMintableEvents {
 	event MintingFinished();
 }
 
 /// @title ERC721 minting logic.
-/// @dev the ERC-165 identifier for this interface is 0x68ccfe89
-contract ERC721Mintable is Dummy, ERC165, ERC721MintableEvents {
+/// @dev the ERC-165 identifier for this interface is 0x476ff149
+contract ERC721UniqueMintable is Dummy, ERC165, ERC721UniqueMintableEvents {
 	/// @dev EVM selector for this function is: 0x05d2035b,
 	///  or in textual repr: mintingFinished()
 	function mintingFinished() public view returns (bool) {
@@ -417,41 +460,63 @@
 	}
 
 	/// @notice Function to mint token.
-	/// @dev `tokenId` should be obtained with `nextTokenId` method,
-	///  unlike standard, you can't specify it manually
 	/// @param to The new owner
-	/// @param tokenId ID of the minted NFT
-	/// @dev EVM selector for this function is: 0x40c10f19,
-	///  or in textual repr: mint(address,uint256)
-	function mint(address to, uint256 tokenId) public returns (bool) {
+	/// @return uint256 The id of the newly minted token
+	/// @dev EVM selector for this function is: 0x6a627842,
+	///  or in textual repr: mint(address)
+	function mint(address to) public returns (uint256) {
 		require(false, stub_error);
 		to;
-		tokenId;
 		dummy = 0;
-		return false;
+		return 0;
 	}
 
+	// /// @notice Function to mint token.
+	// /// @dev `tokenId` should be obtained with `nextTokenId` method,
+	// ///  unlike standard, you can't specify it manually
+	// /// @param to The new owner
+	// /// @param tokenId ID of the minted NFT
+	// /// @dev EVM selector for this function is: 0x40c10f19,
+	// ///  or in textual repr: mint(address,uint256)
+	// function mint(address to, uint256 tokenId) public returns (bool) {
+	// 	require(false, stub_error);
+	// 	to;
+	// 	tokenId;
+	// 	dummy = 0;
+	// 	return false;
+	// }
+
 	/// @notice Function to mint token with the given tokenUri.
-	/// @dev `tokenId` should be obtained with `nextTokenId` method,
-	///  unlike standard, you can't specify it manually
 	/// @param to The new owner
-	/// @param tokenId ID of the minted NFT
 	/// @param tokenUri Token URI that would be stored in the NFT properties
-	/// @dev EVM selector for this function is: 0x50bb4e7f,
-	///  or in textual repr: mintWithTokenURI(address,uint256,string)
-	function mintWithTokenURI(
-		address to,
-		uint256 tokenId,
-		string memory tokenUri
-	) public returns (bool) {
+	/// @return uint256 The id of the newly minted token
+	/// @dev EVM selector for this function is: 0x45c17782,
+	///  or in textual repr: mintWithTokenURI(address,string)
+	function mintWithTokenURI(address to, string memory tokenUri) public returns (uint256) {
 		require(false, stub_error);
 		to;
-		tokenId;
 		tokenUri;
 		dummy = 0;
-		return false;
+		return 0;
 	}
 
+	// /// @notice Function to mint token with the given tokenUri.
+	// /// @dev `tokenId` should be obtained with `nextTokenId` method,
+	// ///  unlike standard, you can't specify it manually
+	// /// @param to The new owner
+	// /// @param tokenId ID of the minted NFT
+	// /// @param tokenUri Token URI that would be stored in the NFT properties
+	// /// @dev EVM selector for this function is: 0x50bb4e7f,
+	// ///  or in textual repr: mintWithTokenURI(address,uint256,string)
+	// function mintWithTokenURI(address to, uint256 tokenId, string memory tokenUri) public returns (bool) {
+	// 	require(false, stub_error);
+	// 	to;
+	// 	tokenId;
+	// 	tokenUri;
+	// 	dummy = 0;
+	// 	return false;
+	// }
+
 	/// @dev Not implemented
 	/// @dev EVM selector for this function is: 0x7d64bcb4,
 	///  or in textual repr: finishMinting()
@@ -463,8 +528,26 @@
 }
 
 /// @title Unique extensions for ERC721.
-/// @dev the ERC-165 identifier for this interface is 0xd74d154f
+/// @dev the ERC-165 identifier for this interface is 0x4468500d
 contract ERC721UniqueExtensions is Dummy, ERC165 {
+	/// @notice A descriptive name for a collection of NFTs in this contract
+	/// @dev EVM selector for this function is: 0x06fdde03,
+	///  or in textual repr: name()
+	function name() public view returns (string memory) {
+		require(false, stub_error);
+		dummy;
+		return "";
+	}
+
+	/// @notice An abbreviated name for NFTs in this contract
+	/// @dev EVM selector for this function is: 0x95d89b41,
+	///  or in textual repr: symbol()
+	function symbol() public view returns (string memory) {
+		require(false, stub_error);
+		dummy;
+		return "";
+	}
+
 	/// @notice Transfer ownership of an NFT
 	/// @dev Throws unless `msg.sender` is the current owner. Throws if `to`
 	///  is the zero address. Throws if `tokenId` is not a valid NFT.
@@ -525,7 +608,7 @@
 	/// @param tokens array of pairs of token ID and token URI for minted tokens
 	/// @dev EVM selector for this function is: 0x36543006,
 	///  or in textual repr: mintBulkWithTokenURI(address,(uint256,string)[])
-	function mintBulkWithTokenURI(address to, Tuple8[] memory tokens) public returns (bool) {
+	function mintBulkWithTokenURI(address to, Tuple6[] memory tokens) public returns (bool) {
 		require(false, stub_error);
 		to;
 		tokens;
@@ -535,7 +618,7 @@
 }
 
 /// @dev anonymous struct
-struct Tuple8 {
+struct Tuple6 {
 	uint256 field_0;
 	string field_1;
 }
@@ -579,48 +662,7 @@
 		return 0;
 	}
 }
-
-/// @title ERC-721 Non-Fungible Token Standard, optional metadata extension
-/// @dev See https://eips.ethereum.org/EIPS/eip-721
-/// @dev the ERC-165 identifier for this interface is 0x5b5e139f
-contract ERC721Metadata is Dummy, ERC165 {
-	/// @notice A descriptive name for a collection of NFTs in this contract
-	/// @dev EVM selector for this function is: 0x06fdde03,
-	///  or in textual repr: name()
-	function name() public view returns (string memory) {
-		require(false, stub_error);
-		dummy;
-		return "";
-	}
-
-	/// @notice An abbreviated name for NFTs in this contract
-	/// @dev EVM selector for this function is: 0x95d89b41,
-	///  or in textual repr: symbol()
-	function symbol() public view returns (string memory) {
-		require(false, stub_error);
-		dummy;
-		return "";
-	}
 
-	/// @notice A distinct Uniform Resource Identifier (URI) for a given asset.
-	///
-	/// @dev If the token has a `url` property and it is not empty, it is returned.
-	///  Else If the collection does not have a property with key `schemaName` or its value is not equal to `ERC721Metadata`, it return an error `tokenURI not set`.
-	///  If the collection property `baseURI` is empty or absent, return "" (empty string)
-	///  otherwise, if token property `suffix` present and is non-empty, return concatenation of baseURI and suffix
-	///  otherwise, return concatenation of `baseURI` and stringified token id (decimal stringifying, without paddings).
-	///
-	/// @return token's const_metadata
-	/// @dev EVM selector for this function is: 0xc87b56dd,
-	///  or in textual repr: tokenURI(uint256)
-	function tokenURI(uint256 tokenId) public view returns (string memory) {
-		require(false, stub_error);
-		tokenId;
-		dummy;
-		return "";
-	}
-}
-
 /// @dev inlined interface
 contract ERC721Events {
 	event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
@@ -766,11 +808,11 @@
 	Dummy,
 	ERC165,
 	ERC721,
-	ERC721Metadata,
 	ERC721Enumerable,
 	ERC721UniqueExtensions,
-	ERC721Mintable,
+	ERC721UniqueMintable,
 	ERC721Burnable,
+	ERC721Metadata,
 	Collection,
 	TokenProperties
 {}

--- a/pallets/proxy-rmrk-core/src/lib.rs
+++ b/pallets/proxy-rmrk-core/src/lib.rs
@@ -1448,7 +1448,15 @@
 		data: CreateCollectionData<T::AccountId>,
 		properties: impl Iterator<Item = Property>,
 	) -> Result<CollectionId, DispatchError> {
-		let collection_id = <PalletNft<T>>::init_collection(sender.clone(), sender, data, true);
+		let collection_id = <PalletNft<T>>::init_collection(
+			sender.clone(),
+			sender,
+			data,
+			up_data_structs::CollectionFlags {
+				external: true,
+				..Default::default()
+			},
+		);
 
 		if let Err(DispatchError::Arithmetic(_)) = &collection_id {
 			return Err(<Error<T>>::NoAvailableCollectionId.into());

--- a/pallets/proxy-rmrk-equip/src/lib.rs
+++ b/pallets/proxy-rmrk-equip/src/lib.rs
@@ -254,7 +254,10 @@
 				cross_sender.clone(),
 				cross_sender.clone(),
 				data,
-				true,
+				up_data_structs::CollectionFlags {
+					external: true,
+					..Default::default()
+				},
 			);
 
 			if let Err(DispatchError::Arithmetic(_)) = &collection_id_res {

--- a/pallets/refungible/src/erc.rs
+++ b/pallets/refungible/src/erc.rs
@@ -21,19 +21,15 @@
 
 extern crate alloc;
 
-use alloc::string::ToString;
 use core::{
 	char::{REPLACEMENT_CHARACTER, decode_utf16},
 	convert::TryInto,
 };
 use evm_coder::{ToLog, execution::*, generate_stubgen, solidity, solidity_interface, types::*, weight};
-use frame_support::BoundedBTreeMap;
+use frame_support::{BoundedBTreeMap, BoundedVec};
 use pallet_common::{
 	CollectionHandle, CollectionPropertyPermissions,
-	erc::{
-		CommonEvmHandler, CollectionCall,
-		static_property::{key, value as property_value},
-	},
+	erc::{CommonEvmHandler, CollectionCall, static_property::key},
 };
 use pallet_evm::{account::CrossAccountId, PrecompileHandle};
 use pallet_evm_coder_substrate::{call, dispatch_to_evm};
@@ -191,7 +187,7 @@
 }
 
 #[derive(ToLog)]
-pub enum ERC721MintableEvents {
+pub enum ERC721UniqueMintableEvents {
 	/// @dev Not supported
 	#[allow(dead_code)]
 	MintingFinished {},
@@ -199,16 +195,18 @@
 
 #[solidity_interface(name = ERC721Metadata)]
 impl<T: Config> RefungibleHandle<T> {
-	/// @notice A descriptive name for a collection of RFTs in this contract
-	fn name(&self) -> Result<string> {
-		Ok(decode_utf16(self.name.iter().copied())
-			.map(|r| r.unwrap_or(REPLACEMENT_CHARACTER))
-			.collect::<string>())
+	/// @notice A descriptive name for a collection of NFTs in this contract
+	/// @dev real implementation of this function lies in `ERC721UniqueExtensions`
+	#[solidity(hide, rename_selector = "name")]
+	fn name_proxy(&self) -> Result<string> {
+		self.name()
 	}
 
-	/// @notice An abbreviated name for RFTs in this contract
-	fn symbol(&self) -> Result<string> {
-		Ok(string::from_utf8_lossy(&self.token_prefix).into())
+	/// @notice An abbreviated name for NFTs in this contract
+	/// @dev real implementation of this function lies in `ERC721UniqueExtensions`
+	#[solidity(hide, rename_selector = "symbol")]
+	fn symbol_proxy(&self) -> Result<string> {
+		self.symbol()
 	}
 
 	/// @notice A distinct Uniform Resource Identifier (URI) for a given asset.
@@ -224,35 +222,38 @@
 	fn token_uri(&self, token_id: uint256) -> Result<string> {
 		let token_id_u32: u32 = token_id.try_into().map_err(|_| "token id overflow")?;
 
-		if let Ok(url) = get_token_property(self, token_id_u32, &key::url()) {
-			if !url.is_empty() {
-				return Ok(url);
+		match get_token_property(self, token_id_u32, &key::url()).as_deref() {
+			Err(_) | Ok("") => (),
+			Ok(url) => {
+				return Ok(url.into());
 			}
-		} else if !is_erc721_metadata_compatible::<T>(self.id) {
-			return Err("tokenURI not set".into());
-		}
+		};
 
-		if let Some(base_uri) =
+		let base_uri =
 			pallet_common::Pallet::<T>::get_collection_property(self.id, &key::base_uri())
-		{
-			if !base_uri.is_empty() {
-				let base_uri = string::from_utf8(base_uri.into_inner()).map_err(|e| {
+				.map(BoundedVec::into_inner)
+				.map(string::from_utf8)
+				.transpose()
+				.map_err(|e| {
 					Error::Revert(alloc::format!(
 						"Can not convert value \"baseURI\" to string with error \"{}\"",
 						e
 					))
 				})?;
-				if let Ok(suffix) = get_token_property(self, token_id_u32, &key::suffix()) {
-					if !suffix.is_empty() {
-						return Ok(base_uri + suffix.as_str());
-					}
-				}
 
-				return Ok(base_uri + token_id.to_string().as_str());
+		let base_uri = match base_uri.as_deref() {
+			None | Some("") => {
+				return Ok("".into());
 			}
-		}
+			Some(base_uri) => base_uri.into(),
+		};
 
-		Ok("".into())
+		Ok(
+			match get_token_property(self, token_id_u32, &key::suffix()).as_deref() {
+				Err(_) | Ok("") => base_uri,
+				Ok(suffix) => base_uri + suffix,
+			},
+		)
 	}
 }
 
@@ -448,19 +449,33 @@
 }
 
 /// @title ERC721 minting logic.
-#[solidity_interface(name = ERC721Mintable, events(ERC721MintableEvents))]
+#[solidity_interface(name = ERC721UniqueMintable, events(ERC721UniqueMintableEvents))]
 impl<T: Config> RefungibleHandle<T> {
 	fn minting_finished(&self) -> Result<bool> {
 		Ok(false)
 	}
 
 	/// @notice Function to mint token.
+	/// @param to The new owner
+	/// @return uint256 The id of the newly minted token
+	#[weight(<SelfWeightOf<T>>::create_item())]
+	fn mint(&mut self, caller: caller, to: address) -> Result<uint256> {
+		let token_id: uint256 = <TokensMinted<T>>::get(self.id)
+			.checked_add(1)
+			.ok_or("item id overflow")?
+			.into();
+		self.mint_check_id(caller, to, token_id)?;
+		Ok(token_id)
+	}
+
+	/// @notice Function to mint token.
 	/// @dev `tokenId` should be obtained with `nextTokenId` method,
 	///  unlike standard, you can't specify it manually
 	/// @param to The new owner
 	/// @param tokenId ID of the minted RFT
+	#[solidity(hide, rename_selector = "mint")]
 	#[weight(<SelfWeightOf<T>>::create_item())]
-	fn mint(&mut self, caller: caller, to: address, token_id: uint256) -> Result<bool> {
+	fn mint_check_id(&mut self, caller: caller, to: address, token_id: uint256) -> Result<bool> {
 		let caller = T::CrossAccountId::from_eth(caller);
 		let to = T::CrossAccountId::from_eth(to);
 		let token_id: u32 = token_id.try_into()?;
@@ -496,14 +511,34 @@
 	}
 
 	/// @notice Function to mint token with the given tokenUri.
+	/// @param to The new owner
+	/// @param tokenUri Token URI that would be stored in the NFT properties
+	/// @return uint256 The id of the newly minted token
+	#[solidity(rename_selector = "mintWithTokenURI")]
+	#[weight(<SelfWeightOf<T>>::create_item())]
+	fn mint_with_token_uri(
+		&mut self,
+		caller: caller,
+		to: address,
+		token_uri: string,
+	) -> Result<uint256> {
+		let token_id: uint256 = <TokensMinted<T>>::get(self.id)
+			.checked_add(1)
+			.ok_or("item id overflow")?
+			.into();
+		self.mint_with_token_uri_check_id(caller, to, token_id, token_uri)?;
+		Ok(token_id)
+	}
+
+	/// @notice Function to mint token with the given tokenUri.
 	/// @dev `tokenId` should be obtained with `nextTokenId` method,
 	///  unlike standard, you can't specify it manually
 	/// @param to The new owner
 	/// @param tokenId ID of the minted RFT
 	/// @param tokenUri Token URI that would be stored in the RFT properties
-	#[solidity(rename_selector = "mintWithTokenURI")]
+	#[solidity(hide, rename_selector = "mintWithTokenURI")]
 	#[weight(<SelfWeightOf<T>>::create_item())]
-	fn mint_with_token_uri(
+	fn mint_with_token_uri_check_id(
 		&mut self,
 		caller: caller,
 		to: address,
@@ -578,17 +613,6 @@
 	Err("Property tokenURI not found".into())
 }
 
-fn is_erc721_metadata_compatible<T: Config>(collection_id: CollectionId) -> bool {
-	if let Some(shema_name) =
-		pallet_common::Pallet::<T>::get_collection_property(collection_id, &key::schema_name())
-	{
-		let shema_name = shema_name.into_inner();
-		shema_name == property_value::ERC721_METADATA
-	} else {
-		false
-	}
-}
-
 fn get_token_permission<T: Config>(
 	collection_id: CollectionId,
 	key: &PropertyKey,
@@ -608,6 +632,18 @@
 /// @title Unique extensions for ERC721.
 #[solidity_interface(name = ERC721UniqueExtensions)]
 impl<T: Config> RefungibleHandle<T> {
+	/// @notice A descriptive name for a collection of NFTs in this contract
+	fn name(&self) -> Result<string> {
+		Ok(decode_utf16(self.name.iter().copied())
+			.map(|r| r.unwrap_or(REPLACEMENT_CHARACTER))
+			.collect::<string>())
+	}
+
+	/// @notice An abbreviated name for NFTs in this contract
+	fn symbol(&self) -> Result<string> {
+		Ok(string::from_utf8_lossy(&self.token_prefix).into())
+	}
+
 	/// @notice Transfer ownership of an RFT
 	/// @dev Throws unless `msg.sender` is the current owner. Throws if `to`
 	///  is the zero address. Throws if `tokenId` is not a valid RFT.
@@ -669,6 +705,7 @@
 	///  should be obtained with `nextTokenId` method
 	/// @param to The new owner
 	/// @param tokenIds IDs of the minted RFTs
+	// #[solidity(hide)]
 	#[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);
@@ -711,7 +748,7 @@
 	///  numbers and first number should be obtained with `nextTokenId` method
 	/// @param to The new owner
 	/// @param tokens array of pairs of token ID and token URI for minted tokens
-	#[solidity(rename_selector = "mintBulkWithTokenURI")]
+	#[solidity(/*hide,*/ rename_selector = "mintBulkWithTokenURI")]
 	#[weight(<SelfWeightOf<T>>::create_multiple_items(tokens.len() as u32))]
 	fn mint_bulk_with_token_uri(
 		&mut self,
@@ -780,11 +817,11 @@
 	name = UniqueRefungible,
 	is(
 		ERC721,
-		ERC721Metadata,
 		ERC721Enumerable,
 		ERC721UniqueExtensions,
-		ERC721Mintable,
+		ERC721UniqueMintable,
 		ERC721Burnable,
+		ERC721Metadata(if(this.flags.erc721metadata)),
 		Collection(via(common_mut returns CollectionHandle<T>)),
 		TokenProperties,
 	)

--- a/pallets/refungible/src/lib.rs
+++ b/pallets/refungible/src/lib.rs
@@ -92,9 +92,11 @@
 
 use codec::{Encode, Decode, MaxEncodedLen};
 use core::ops::Deref;
+use derivative::Derivative;
 use evm_coder::ToLog;
 use frame_support::{
-	BoundedVec, ensure, fail, storage::with_transaction, transactional, pallet_prelude::ConstU32,
+	BoundedBTreeMap, BoundedVec, ensure, fail, storage::with_transaction, transactional,
+	pallet_prelude::ConstU32,
 };
 use pallet_evm::{account::CrossAccountId, Pallet as PalletEvm};
 use pallet_evm_coder_substrate::WithRecorder;
@@ -113,8 +115,6 @@
 	MAX_REFUNGIBLE_PIECES, Property, PropertyKey, PropertyKeyPermission, PropertyPermission,
 	PropertyScope, PropertyValue, TokenId, TrySetProperty,
 };
-use frame_support::BoundedBTreeMap;
-use derivative::Derivative;
 
 pub use pallet::*;
 #[cfg(feature = "runtime-benchmarks")]
@@ -371,8 +371,9 @@
 		owner: T::CrossAccountId,
 		payer: T::CrossAccountId,
 		data: CreateCollectionData<T::AccountId>,
+		flags: CollectionFlags,
 	) -> Result<CollectionId, DispatchError> {
-		<PalletCommon<T>>::init_collection(owner, payer, data, CollectionFlags::default())
+		<PalletCommon<T>>::init_collection(owner, payer, data, flags)
 	}
 
 	/// Destroy RFT collection

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--- a/pallets/unique/src/eth/mod.rs
+++ b/pallets/unique/src/eth/mod.rs
@@ -25,14 +25,16 @@
 	dispatch::CollectionDispatch,
 	erc::{
 		CollectionHelpersEvents,
-		static_property::{key, value as property_value},
+		static_property::{key},
 	},
+	Pallet as PalletCommon,
 };
 use pallet_evm_coder_substrate::{dispatch_to_evm, SubstrateRecorder, WithRecorder};
 use pallet_evm::{account::CrossAccountId, OnMethodCall, PrecompileHandle, PrecompileResult};
+use sp_std::vec;
 use up_data_structs::{
 	CollectionName, CollectionDescription, CollectionTokenPrefix, CreateCollectionData,
-	CollectionMode, PropertyValue,
+	CollectionMode, PropertyValue, CollectionFlags,
 };
 
 use crate::{Config, SelfWeightOf, weights::WeightInfo};
@@ -57,13 +59,11 @@
 	name: string,
 	description: string,
 	token_prefix: string,
-	base_uri: string,
 ) -> Result<(
 	T::CrossAccountId,
 	CollectionName,
 	CollectionDescription,
 	CollectionTokenPrefix,
-	PropertyValue,
 )> {
 	let caller = T::CrossAccountId::from_eth(caller);
 	let name = name
@@ -81,75 +81,7 @@
 	let token_prefix = token_prefix.into_bytes().try_into().map_err(|_| {
 		error_field_too_long(stringify!(token_prefix), CollectionTokenPrefix::bound())
 	})?;
-	let base_uri_value = base_uri
-		.into_bytes()
-		.try_into()
-		.map_err(|_| error_field_too_long(stringify!(token_prefix), PropertyValue::bound()))?;
-	Ok((caller, name, description, token_prefix, base_uri_value))
-}
-
-fn make_data<T: Config>(
-	name: CollectionName,
-	mode: CollectionMode,
-	description: CollectionDescription,
-	token_prefix: CollectionTokenPrefix,
-	base_uri_value: PropertyValue,
-	add_properties: bool,
-) -> Result<CreateCollectionData<T::AccountId>> {
-	let mut properties = up_data_structs::CollectionPropertiesVec::default();
-	let mut token_property_permissions =
-		up_data_structs::CollectionPropertiesPermissionsVec::default();
-
-	token_property_permissions
-		.try_push(up_data_structs::PropertyKeyPermission {
-			key: key::url(),
-			permission: up_data_structs::PropertyPermission {
-				mutable: false,
-				collection_admin: true,
-				token_owner: false,
-			},
-		})
-		.map_err(|e| Error::Revert(format!("{:?}", e)))?;
-
-	if add_properties {
-		token_property_permissions
-			.try_push(up_data_structs::PropertyKeyPermission {
-				key: key::suffix(),
-				permission: up_data_structs::PropertyPermission {
-					mutable: false,
-					collection_admin: true,
-					token_owner: false,
-				},
-			})
-			.map_err(|e| Error::Revert(format!("{:?}", e)))?;
-
-		properties
-			.try_push(up_data_structs::Property {
-				key: key::schema_name(),
-				value: property_value::erc721(),
-			})
-			.map_err(|e| Error::Revert(format!("{:?}", e)))?;
-
-		if !base_uri_value.is_empty() {
-			properties
-				.try_push(up_data_structs::Property {
-					key: key::base_uri(),
-					value: base_uri_value,
-				})
-				.map_err(|e| Error::Revert(format!("{:?}", e)))?;
-		}
-	}
-
-	let data = CreateCollectionData {
-		name,
-		mode,
-		description,
-		token_prefix,
-		token_property_permissions,
-		properties,
-		..Default::default()
-	};
-	Ok(data)
+	Ok((caller, name, description, token_prefix))
 }
 
 fn create_refungible_collection_internal<
@@ -160,26 +92,27 @@
 	name: string,
 	description: string,
 	token_prefix: string,
-	base_uri: string,
-	add_properties: bool,
 ) -> Result<address> {
-	let (caller, name, description, token_prefix, base_uri_value) =
-		convert_data::<T>(caller, name, description, token_prefix, base_uri)?;
-	let data = make_data::<T>(
+	let (caller, name, description, token_prefix) =
+		convert_data::<T>(caller, name, description, token_prefix)?;
+	let data = CreateCollectionData {
 		name,
-		CollectionMode::ReFungible,
+		mode: CollectionMode::ReFungible,
 		description,
 		token_prefix,
-		base_uri_value,
-		add_properties,
-	)?;
+		..Default::default()
+	};
 	check_sent_amount_equals_collection_creation_price::<T>(value)?;
 	let collection_helpers_address =
 		T::CrossAccountId::from_eth(<T as pallet_common::Config>::ContractAddress::get());
 
-	let collection_id =
-		T::CollectionDispatch::create(caller.clone(), collection_helpers_address, data)
-			.map_err(pallet_evm_coder_substrate::dispatch_to_evm::<T>)?;
+	let collection_id = T::CollectionDispatch::create(
+		caller.clone(),
+		collection_helpers_address,
+		data,
+		Default::default(),
+	)
+	.map_err(pallet_evm_coder_substrate::dispatch_to_evm::<T>)?;
 	let address = pallet_common::eth::collection_id_to_address(collection_id);
 	Ok(address)
 }
@@ -212,7 +145,8 @@
 	/// @param tokenPrefix Token prefix to represent the collection tokens in UI and user applications
 	/// @return address Address of the newly created collection
 	#[weight(<SelfWeightOf<T>>::create_collection())]
-	fn create_nonfungible_collection(
+	#[solidity(rename_selector = "createNFTCollection")]
+	fn create_nft_collection(
 		&mut self,
 		caller: caller,
 		value: value,
@@ -220,60 +154,51 @@
 		description: string,
 		token_prefix: string,
 	) -> Result<address> {
-		let (caller, name, description, token_prefix, _base_uri_value) =
-			convert_data::<T>(caller, name, description, token_prefix, "".into())?;
-		let data = make_data::<T>(
+		let (caller, name, description, token_prefix) =
+			convert_data::<T>(caller, name, description, token_prefix)?;
+		let data = CreateCollectionData {
 			name,
-			CollectionMode::NFT,
+			mode: CollectionMode::NFT,
 			description,
 			token_prefix,
-			Default::default(),
-			false,
-		)?;
+			..Default::default()
+		};
 		check_sent_amount_equals_collection_creation_price::<T>(value)?;
 		let collection_helpers_address =
 			T::CrossAccountId::from_eth(<T as pallet_common::Config>::ContractAddress::get());
-		let collection_id = T::CollectionDispatch::create(caller, collection_helpers_address, data)
-			.map_err(dispatch_to_evm::<T>)?;
+		let collection_id = T::CollectionDispatch::create(
+			caller,
+			collection_helpers_address,
+			data,
+			Default::default(),
+		)
+		.map_err(dispatch_to_evm::<T>)?;
 
 		let address = pallet_common::eth::collection_id_to_address(collection_id);
 		Ok(address)
 	}
-
+	/// Create an NFT collection
+	/// @param name Name of the collection
+	/// @param description Informative description of the collection
+	/// @param tokenPrefix Token prefix to represent the collection tokens in UI and user applications
+	/// @return address Address of the newly created collection
 	#[weight(<SelfWeightOf<T>>::create_collection())]
-	#[solidity(rename_selector = "createERC721MetadataCompatibleCollection")]
-	fn create_nonfungible_collection_with_properties(
+	#[deprecated(note = "mathod was renamed to `create_nft_collection`, prefer it instead")]
+	#[solidity(hide)]
+	fn create_nonfungible_collection(
 		&mut self,
 		caller: caller,
 		value: value,
 		name: string,
 		description: string,
 		token_prefix: string,
-		base_uri: string,
 	) -> Result<address> {
-		let (caller, name, description, token_prefix, base_uri_value) =
-			convert_data::<T>(caller, name, description, token_prefix, base_uri)?;
-		let data = make_data::<T>(
-			name,
-			CollectionMode::NFT,
-			description,
-			token_prefix,
-			base_uri_value,
-			true,
-		)?;
-		check_sent_amount_equals_collection_creation_price::<T>(value)?;
-		let collection_helpers_address =
-			T::CrossAccountId::from_eth(<T as pallet_common::Config>::ContractAddress::get());
-		let collection_id = T::CollectionDispatch::create(caller, collection_helpers_address, data)
-			.map_err(pallet_evm_coder_substrate::dispatch_to_evm::<T>)?;
-
-		let address = pallet_common::eth::collection_id_to_address(collection_id);
-		Ok(address)
+		self.create_nft_collection(caller, value, name, description, token_prefix)
 	}
 
 	#[weight(<SelfWeightOf<T>>::create_collection())]
 	#[solidity(rename_selector = "createRFTCollection")]
-	fn create_refungible_collection(
+	fn create_rft_collection(
 		&mut self,
 		caller: caller,
 		value: value,
@@ -281,37 +206,94 @@
 		description: string,
 		token_prefix: string,
 	) -> Result<address> {
-		create_refungible_collection_internal::<T>(
-			caller,
-			value,
-			name,
-			description,
-			token_prefix,
-			Default::default(),
-			false,
-		)
+		create_refungible_collection_internal::<T>(caller, value, name, description, token_prefix)
 	}
 
-	#[weight(<SelfWeightOf<T>>::create_collection())]
-	#[solidity(rename_selector = "createERC721MetadataCompatibleRFTCollection")]
-	fn create_refungible_collection_with_properties(
+	#[solidity(rename_selector = "makeCollectionERC721MetadataCompatible")]
+	fn make_collection_metadata_compatible(
 		&mut self,
 		caller: caller,
-		value: value,
-		name: string,
-		description: string,
-		token_prefix: string,
+		collection: address,
 		base_uri: string,
-	) -> Result<address> {
-		create_refungible_collection_internal::<T>(
-			caller,
-			value,
-			name,
-			description,
-			token_prefix,
-			base_uri,
-			true,
-		)
+	) -> Result<()> {
+		let caller = T::CrossAccountId::from_eth(caller);
+		let collection =
+			pallet_common::eth::map_eth_to_id(&collection).ok_or("not a collection address")?;
+		let mut collection =
+			<crate::CollectionHandle<T>>::new(collection).ok_or("collection not found")?;
+
+		if !matches!(
+			collection.mode,
+			CollectionMode::NFT | CollectionMode::ReFungible
+		) {
+			return Err("target collection should be either NFT or Refungible".into());
+		}
+
+		self.recorder().consume_sstore()?;
+		collection
+			.check_is_owner_or_admin(&caller)
+			.map_err(dispatch_to_evm::<T>)?;
+
+		if collection.flags.erc721metadata {
+			return Err("target collection is already Erc721Metadata compatible".into());
+		}
+		collection.flags.erc721metadata = true;
+
+		let all_permissions = <pallet_common::CollectionPropertyPermissions<T>>::get(collection.id);
+		if all_permissions.get(&key::url()).is_none() {
+			self.recorder().consume_sstore()?;
+			<PalletCommon<T>>::set_property_permission(
+				&collection,
+				&caller,
+				up_data_structs::PropertyKeyPermission {
+					key: key::url(),
+					permission: up_data_structs::PropertyPermission {
+						mutable: true,
+						collection_admin: true,
+						token_owner: false,
+					},
+				},
+			)
+			.map_err(dispatch_to_evm::<T>)?;
+		}
+		if all_permissions.get(&key::suffix()).is_none() {
+			self.recorder().consume_sstore()?;
+			<PalletCommon<T>>::set_property_permission(
+				&collection,
+				&caller,
+				up_data_structs::PropertyKeyPermission {
+					key: key::suffix(),
+					permission: up_data_structs::PropertyPermission {
+						mutable: true,
+						collection_admin: true,
+						token_owner: false,
+					},
+				},
+			)
+			.map_err(dispatch_to_evm::<T>)?;
+		}
+
+		let all_properties = <pallet_common::CollectionProperties<T>>::get(collection.id);
+		if all_properties.get(&key::base_uri()).is_none() && !base_uri.is_empty() {
+			self.recorder().consume_sstore()?;
+			<PalletCommon<T>>::set_collection_properties(
+				&collection,
+				&caller,
+				vec![up_data_structs::Property {
+					key: key::base_uri(),
+					value: base_uri
+						.into_bytes()
+						.try_into()
+						.map_err(|_| "base uri is too large")?,
+				}],
+			)
+			.map_err(dispatch_to_evm::<T>)?;
+		}
+
+		self.recorder().consume_sstore()?;
+		collection.save().map_err(dispatch_to_evm::<T>)?;
+
+		Ok(())
 	}
 
 	/// Check if a collection exists

binary blob — no preview

--- a/pallets/unique/src/eth/stubs/CollectionHelpers.sol
+++ b/pallets/unique/src/eth/stubs/CollectionHelpers.sol
@@ -23,16 +23,16 @@
 }
 
 /// @title Contract, which allows users to operate with collections
-/// @dev the ERC-165 identifier for this interface is 0x5ad4f440
+/// @dev the ERC-165 identifier for this interface is 0x58918631
 contract CollectionHelpers is Dummy, ERC165, CollectionHelpersEvents {
 	/// Create an NFT collection
 	/// @param name Name of the collection
 	/// @param description Informative description of the collection
 	/// @param tokenPrefix Token prefix to represent the collection tokens in UI and user applications
 	/// @return address Address of the newly created collection
-	/// @dev EVM selector for this function is: 0xe34a6844,
-	///  or in textual repr: createNonfungibleCollection(string,string,string)
-	function createNonfungibleCollection(
+	/// @dev EVM selector for this function is: 0x844af658,
+	///  or in textual repr: createNFTCollection(string,string,string)
+	function createNFTCollection(
 		string memory name,
 		string memory description,
 		string memory tokenPrefix
@@ -45,22 +45,21 @@
 		return 0x0000000000000000000000000000000000000000;
 	}
 
-	/// @dev EVM selector for this function is: 0xa634a5f9,
-	///  or in textual repr: createERC721MetadataCompatibleCollection(string,string,string,string)
-	function createERC721MetadataCompatibleCollection(
-		string memory name,
-		string memory description,
-		string memory tokenPrefix,
-		string memory baseUri
-	) public payable returns (address) {
-		require(false, stub_error);
-		name;
-		description;
-		tokenPrefix;
-		baseUri;
-		dummy = 0;
-		return 0x0000000000000000000000000000000000000000;
-	}
+	// /// Create an NFT collection
+	// /// @param name Name of the collection
+	// /// @param description Informative description of the collection
+	// /// @param tokenPrefix Token prefix to represent the collection tokens in UI and user applications
+	// /// @return address Address of the newly created collection
+	// /// @dev EVM selector for this function is: 0xe34a6844,
+	// ///  or in textual repr: createNonfungibleCollection(string,string,string)
+	// function createNonfungibleCollection(string memory name, string memory description, string memory tokenPrefix) public payable returns (address) {
+	// 	require(false, stub_error);
+	// 	name;
+	// 	description;
+	// 	tokenPrefix;
+	// 	dummy = 0;
+	// 	return 0x0000000000000000000000000000000000000000;
+	// }
 
 	/// @dev EVM selector for this function is: 0xab173450,
 	///  or in textual repr: createRFTCollection(string,string,string)
@@ -77,21 +76,13 @@
 		return 0x0000000000000000000000000000000000000000;
 	}
 
-	/// @dev EVM selector for this function is: 0xa5596388,
-	///  or in textual repr: createERC721MetadataCompatibleRFTCollection(string,string,string,string)
-	function createERC721MetadataCompatibleRFTCollection(
-		string memory name,
-		string memory description,
-		string memory tokenPrefix,
-		string memory baseUri
-	) public payable returns (address) {
+	/// @dev EVM selector for this function is: 0x85624258,
+	///  or in textual repr: makeCollectionERC721MetadataCompatible(address,string)
+	function makeCollectionERC721MetadataCompatible(address collection, string memory baseUri) public {
 		require(false, stub_error);
-		name;
-		description;
-		tokenPrefix;
+		collection;
 		baseUri;
 		dummy = 0;
-		return 0x0000000000000000000000000000000000000000;
 	}
 
 	/// Check if a collection exists

--- a/pallets/unique/src/lib.rs
+++ b/pallets/unique/src/lib.rs
@@ -345,7 +345,7 @@
 
 			// =========
 			let sender = T::CrossAccountId::from_sub(sender);
-			let _id = T::CollectionDispatch::create(sender.clone(), sender, data)?;
+			let _id = T::CollectionDispatch::create(sender.clone(), sender, data, Default::default())?;
 
 			Ok(())
 		}

--- a/primitives/data-structs/src/lib.rs
+++ b/primitives/data-structs/src/lib.rs
@@ -365,11 +365,14 @@
 	/// Tokens in foreign collections can be transferred, but not burnt
 	#[bondrewd(bits = "0..1")]
 	pub foreign: bool,
+	/// Supports ERC721Metadata
+	#[bondrewd(bits = "1..2")]
+	pub erc721metadata: bool,
 	/// External collections can't be managed using `unique` api
 	#[bondrewd(bits = "7..8")]
 	pub external: bool,
 
-	#[bondrewd(reserve, bits = "1..7")]
+	#[bondrewd(reserve, bits = "2..7")]
 	pub reserved: u8,
 }
 bondrewd_codec!(CollectionFlags);
@@ -434,6 +437,15 @@
 	pub meta_update_permission: MetaUpdatePermission,
 }
 
+#[derive(Encode, Decode, Clone, PartialEq, TypeInfo)]
+#[cfg_attr(feature = "serde1", derive(Serialize, Deserialize))]
+pub struct RpcCollectionFlags {
+	/// Is collection is foreign.
+	pub foreign: bool,
+	/// Collection supports ERC721Metadata.
+	pub erc721metadata: bool,
+}
+
 /// Collection parameters, used in RPC calls (see [`Collection`] for the storage version).
 #[derive(Encode, Decode, Clone, PartialEq, TypeInfo)]
 #[cfg_attr(feature = "serde1", derive(Serialize, Deserialize))]
@@ -471,8 +483,8 @@
 	/// Is collection read only.
 	pub read_only: bool,
 
-	/// Is collection is foreign.
-	pub foreign: bool,
+	/// Extra collection flags
+	pub flags: RpcCollectionFlags,
 }
 
 /// Data used for create collection.

--- a/runtime/common/dispatch.rs
+++ b/runtime/common/dispatch.rs
@@ -31,7 +31,7 @@
 };
 use up_data_structs::{
 	CollectionMode, CreateCollectionData, MAX_DECIMAL_POINTS, mapping::TokenAddressMapping,
-	CollectionId,
+	CollectionId, CollectionFlags,
 };
 
 #[cfg(not(feature = "refungible"))]
@@ -57,10 +57,11 @@
 		sender: T::CrossAccountId,
 		payer: T::CrossAccountId,
 		data: CreateCollectionData<T::AccountId>,
+		flags: CollectionFlags,
 	) -> Result<CollectionId, DispatchError> {
 		let id = match data.mode {
 			CollectionMode::NFT => {
-				<PalletNonfungible<T>>::init_collection(sender, payer, data, false)?
+				<PalletNonfungible<T>>::init_collection(sender, payer, data, flags)?
 			}
 			CollectionMode::Fungible(decimal_points) => {
 				// check params
@@ -68,11 +69,13 @@
 					decimal_points <= MAX_DECIMAL_POINTS,
 					pallet_unique::Error::<T>::CollectionDecimalPointLimitExceeded
 				);
-				<PalletFungible<T>>::init_collection(sender, payer, data)?
+				<PalletFungible<T>>::init_collection(sender, payer, data, flags)?
 			}
 
 			#[cfg(feature = "refungible")]
-			CollectionMode::ReFungible => <PalletRefungible<T>>::init_collection(sender, payer, data)?,
+			CollectionMode::ReFungible => {
+				<PalletRefungible<T>>::init_collection(sender, payer, data, flags)?
+			}
 
 			#[cfg(not(feature = "refungible"))]
 			CollectionMode::ReFungible => return unsupported!(T),

--- a/runtime/common/ethereum/sponsoring.rs
+++ b/runtime/common/ethereum/sponsoring.rs
@@ -24,7 +24,7 @@
 use pallet_nonfungible::{
 	Config as NonfungibleConfig,
 	erc::{
-		UniqueNFTCall, ERC721UniqueExtensionsCall, ERC721MintableCall, ERC721Call,
+		UniqueNFTCall, ERC721UniqueExtensionsCall, ERC721UniqueMintableCall, ERC721Call,
 		TokenPropertiesCall,
 	},
 };
@@ -82,18 +82,17 @@
 						let token_id: TokenId = token_id.try_into().ok()?;
 						withdraw_transfer::<T>(&collection, &who, &token_id).map(|()| sponsor)
 					}
-					UniqueNFTCall::ERC721Mintable(
-						ERC721MintableCall::Mint { token_id, .. }
-						| ERC721MintableCall::MintWithTokenUri { token_id, .. },
-					) => {
-						let _token_id: TokenId = token_id.try_into().ok()?;
-						withdraw_create_item::<T>(
-							&collection,
-							&who,
-							&CreateItemData::NFT(CreateNftData::default()),
-						)
-						.map(|()| sponsor)
-					}
+					UniqueNFTCall::ERC721UniqueMintable(
+						ERC721UniqueMintableCall::Mint { .. }
+						| ERC721UniqueMintableCall::MintCheckId { .. }
+						| ERC721UniqueMintableCall::MintWithTokenUri { .. }
+						| ERC721UniqueMintableCall::MintWithTokenUriCheckId { .. },
+					) => withdraw_create_item::<T>(
+						&collection,
+						&who,
+						&CreateItemData::NFT(CreateNftData::default()),
+					)
+					.map(|()| sponsor),
 					UniqueNFTCall::ERC721(ERC721Call::TransferFrom { token_id, from, .. }) => {
 						let token_id: TokenId = token_id.try_into().ok()?;
 						let from = T::CrossAccountId::from_eth(from);

--- a/tests/src/eth/allowlist.test.ts
+++ b/tests/src/eth/allowlist.test.ts
@@ -78,7 +78,7 @@
     const owner = await helper.eth.createAccountWithBalance(donor);
     const user = helper.eth.createAccount();
 
-    const {collectionAddress} = await helper.eth.createNonfungibleCollection(owner, 'A', 'B', 'C');
+    const {collectionAddress} = await helper.eth.createNFTCollection(owner, 'A', 'B', 'C');
     const collectionEvm = helper.ethNativeContract.collection(collectionAddress, 'nft', owner);
 
     expect(await collectionEvm.methods.allowed(user).call({from: owner})).to.be.false;
@@ -94,7 +94,7 @@
   //   const owner = await helper.eth.createAccountWithBalance(donor);
   //   const user = donor;
 
-  //   const {collectionAddress, collectionId} = await helper.eth.createNonfungibleCollection(owner, 'A', 'B', 'C');
+  //   const {collectionAddress, collectionId} = await helper.eth.createNFTCollection(owner, 'A', 'B', 'C');
   //   const collectionEvm = helper.ethNativeContract.collection(collectionAddress, 'nft', owner);
 
   //   expect(await helper.collection.allowed(collectionId, {Substrate: user.address})).to.be.false;
@@ -110,7 +110,7 @@
     const notOwner = await helper.eth.createAccountWithBalance(donor);
     const user = helper.eth.createAccount();
 
-    const {collectionAddress} = await helper.eth.createNonfungibleCollection(owner, 'A', 'B', 'C');
+    const {collectionAddress} = await helper.eth.createNFTCollection(owner, 'A', 'B', 'C');
     const collectionEvm = helper.ethNativeContract.collection(collectionAddress, 'nft', owner);
 
     expect(await collectionEvm.methods.allowed(user).call({from: owner})).to.be.false;
@@ -129,7 +129,7 @@
   //   const notOwner = await helper.eth.createAccountWithBalance(donor);
   //   const user = donor;
 
-  //   const {collectionAddress, collectionId} = await helper.eth.createNonfungibleCollection(owner, 'A', 'B', 'C');
+  //   const {collectionAddress, collectionId} = await helper.eth.createNFTCollection(owner, 'A', 'B', 'C');
   //   const collectionEvm = helper.ethNativeContract.collection(collectionAddress, 'nft', owner);
 
   //   expect(await helper.collection.allowed(collectionId, {Substrate: user.address})).to.be.false;

--- a/tests/src/eth/api/CollectionHelpers.sol
+++ b/tests/src/eth/api/CollectionHelpers.sol
@@ -18,29 +18,29 @@
 }
 
 /// @title Contract, which allows users to operate with collections
-/// @dev the ERC-165 identifier for this interface is 0x5ad4f440
+/// @dev the ERC-165 identifier for this interface is 0x58918631
 interface CollectionHelpers is Dummy, ERC165, CollectionHelpersEvents {
 	/// Create an NFT collection
 	/// @param name Name of the collection
 	/// @param description Informative description of the collection
 	/// @param tokenPrefix Token prefix to represent the collection tokens in UI and user applications
 	/// @return address Address of the newly created collection
-	/// @dev EVM selector for this function is: 0xe34a6844,
-	///  or in textual repr: createNonfungibleCollection(string,string,string)
-	function createNonfungibleCollection(
+	/// @dev EVM selector for this function is: 0x844af658,
+	///  or in textual repr: createNFTCollection(string,string,string)
+	function createNFTCollection(
 		string memory name,
 		string memory description,
 		string memory tokenPrefix
 	) external payable returns (address);
 
-	/// @dev EVM selector for this function is: 0xa634a5f9,
-	///  or in textual repr: createERC721MetadataCompatibleCollection(string,string,string,string)
-	function createERC721MetadataCompatibleCollection(
-		string memory name,
-		string memory description,
-		string memory tokenPrefix,
-		string memory baseUri
-	) external payable returns (address);
+	// /// Create an NFT collection
+	// /// @param name Name of the collection
+	// /// @param description Informative description of the collection
+	// /// @param tokenPrefix Token prefix to represent the collection tokens in UI and user applications
+	// /// @return address Address of the newly created collection
+	// /// @dev EVM selector for this function is: 0xe34a6844,
+	// ///  or in textual repr: createNonfungibleCollection(string,string,string)
+	// function createNonfungibleCollection(string memory name, string memory description, string memory tokenPrefix) external payable returns (address);
 
 	/// @dev EVM selector for this function is: 0xab173450,
 	///  or in textual repr: createRFTCollection(string,string,string)
@@ -50,14 +50,9 @@
 		string memory tokenPrefix
 	) external payable returns (address);
 
-	/// @dev EVM selector for this function is: 0xa5596388,
-	///  or in textual repr: createERC721MetadataCompatibleRFTCollection(string,string,string,string)
-	function createERC721MetadataCompatibleRFTCollection(
-		string memory name,
-		string memory description,
-		string memory tokenPrefix,
-		string memory baseUri
-	) external payable returns (address);
+	/// @dev EVM selector for this function is: 0x85624258,
+	///  or in textual repr: makeCollectionERC721MetadataCompatible(address,string)
+	function makeCollectionERC721MetadataCompatible(address collection, string memory baseUri) external;
 
 	/// Check if a collection exists
 	/// @param collectionAddress Address of the collection in question

--- a/tests/src/eth/api/UniqueFungible.sol
+++ b/tests/src/eth/api/UniqueFungible.sol
@@ -13,7 +13,7 @@
 }
 
 /// @title A contract that allows you to work with collections.
-/// @dev the ERC-165 identifier for this interface is 0x3e1e8083
+/// @dev the ERC-165 identifier for this interface is 0x62e22290
 interface Collection is Dummy, ERC165 {
 	/// Set collection property.
 	///
@@ -194,9 +194,9 @@
 	///
 	/// @dev Owner can be changed only by current owner
 	/// @param newOwner new owner account
-	/// @dev EVM selector for this function is: 0x13af4035,
-	///  or in textual repr: setOwner(address)
-	function setOwner(address newOwner) external;
+	/// @dev EVM selector for this function is: 0x4f53e226,
+	///  or in textual repr: changeCollectionOwner(address)
+	function changeCollectionOwner(address newOwner) external;
 }
 
 /// @dev the ERC-165 identifier for this interface is 0x63034ac5

--- a/tests/src/eth/api/UniqueNFT.sol
+++ b/tests/src/eth/api/UniqueNFT.sol
@@ -62,7 +62,7 @@
 }
 
 /// @title A contract that allows you to work with collections.
-/// @dev the ERC-165 identifier for this interface is 0x3e1e8083
+/// @dev the ERC-165 identifier for this interface is 0x62e22290
 interface Collection is Dummy, ERC165 {
 	/// Set collection property.
 	///
@@ -243,9 +243,9 @@
 	///
 	/// @dev Owner can be changed only by current owner
 	/// @param newOwner new owner account
-	/// @dev EVM selector for this function is: 0x13af4035,
-	///  or in textual repr: setOwner(address)
-	function setOwner(address newOwner) external;
+	/// @dev EVM selector for this function is: 0x4f53e226,
+	///  or in textual repr: changeCollectionOwner(address)
+	function changeCollectionOwner(address newOwner) external;
 }
 
 /// @dev anonymous struct
@@ -254,6 +254,36 @@
 	uint256 field_1;
 }
 
+/// @title ERC-721 Non-Fungible Token Standard, optional metadata extension
+/// @dev See https://eips.ethereum.org/EIPS/eip-721
+/// @dev the ERC-165 identifier for this interface is 0x5b5e139f
+interface ERC721Metadata is Dummy, ERC165 {
+	// /// @notice A descriptive name for a collection of NFTs in this contract
+	// /// @dev real implementation of this function lies in `ERC721UniqueExtensions`
+	// /// @dev EVM selector for this function is: 0x06fdde03,
+	// ///  or in textual repr: name()
+	// function name() external view returns (string memory);
+
+	// /// @notice An abbreviated name for NFTs in this contract
+	// /// @dev real implementation of this function lies in `ERC721UniqueExtensions`
+	// /// @dev EVM selector for this function is: 0x95d89b41,
+	// ///  or in textual repr: symbol()
+	// function symbol() external view returns (string memory);
+
+	/// @notice A distinct Uniform Resource Identifier (URI) for a given asset.
+	///
+	/// @dev If the token has a `url` property and it is not empty, it is returned.
+	///  Else If the collection does not have a property with key `schemaName` or its value is not equal to `ERC721Metadata`, it return an error `tokenURI not set`.
+	///  If the collection property `baseURI` is empty or absent, return "" (empty string)
+	///  otherwise, if token property `suffix` present and is non-empty, return concatenation of baseURI and suffix
+	///  otherwise, return concatenation of `baseURI` and stringified token id (decimal stringifying, without paddings).
+	///
+	/// @return token's const_metadata
+	/// @dev EVM selector for this function is: 0xc87b56dd,
+	///  or in textual repr: tokenURI(uint256)
+	function tokenURI(uint256 tokenId) external view returns (string memory);
+}
+
 /// @title ERC721 Token that can be irreversibly burned (destroyed).
 /// @dev the ERC-165 identifier for this interface is 0x42966c68
 interface ERC721Burnable is Dummy, ERC165 {
@@ -267,39 +297,50 @@
 }
 
 /// @dev inlined interface
-interface ERC721MintableEvents {
+interface ERC721UniqueMintableEvents {
 	event MintingFinished();
 }
 
 /// @title ERC721 minting logic.
-/// @dev the ERC-165 identifier for this interface is 0x68ccfe89
-interface ERC721Mintable is Dummy, ERC165, ERC721MintableEvents {
+/// @dev the ERC-165 identifier for this interface is 0x476ff149
+interface ERC721UniqueMintable is Dummy, ERC165, ERC721UniqueMintableEvents {
 	/// @dev EVM selector for this function is: 0x05d2035b,
 	///  or in textual repr: mintingFinished()
 	function mintingFinished() external view returns (bool);
 
 	/// @notice Function to mint token.
-	/// @dev `tokenId` should be obtained with `nextTokenId` method,
-	///  unlike standard, you can't specify it manually
 	/// @param to The new owner
-	/// @param tokenId ID of the minted NFT
-	/// @dev EVM selector for this function is: 0x40c10f19,
-	///  or in textual repr: mint(address,uint256)
-	function mint(address to, uint256 tokenId) external returns (bool);
+	/// @return uint256 The id of the newly minted token
+	/// @dev EVM selector for this function is: 0x6a627842,
+	///  or in textual repr: mint(address)
+	function mint(address to) external returns (uint256);
+
+	// /// @notice Function to mint token.
+	// /// @dev `tokenId` should be obtained with `nextTokenId` method,
+	// ///  unlike standard, you can't specify it manually
+	// /// @param to The new owner
+	// /// @param tokenId ID of the minted NFT
+	// /// @dev EVM selector for this function is: 0x40c10f19,
+	// ///  or in textual repr: mint(address,uint256)
+	// function mint(address to, uint256 tokenId) external returns (bool);
 
 	/// @notice Function to mint token with the given tokenUri.
-	/// @dev `tokenId` should be obtained with `nextTokenId` method,
-	///  unlike standard, you can't specify it manually
 	/// @param to The new owner
-	/// @param tokenId ID of the minted NFT
 	/// @param tokenUri Token URI that would be stored in the NFT properties
-	/// @dev EVM selector for this function is: 0x50bb4e7f,
-	///  or in textual repr: mintWithTokenURI(address,uint256,string)
-	function mintWithTokenURI(
-		address to,
-		uint256 tokenId,
-		string memory tokenUri
-	) external returns (bool);
+	/// @return uint256 The id of the newly minted token
+	/// @dev EVM selector for this function is: 0x45c17782,
+	///  or in textual repr: mintWithTokenURI(address,string)
+	function mintWithTokenURI(address to, string memory tokenUri) external returns (uint256);
+
+	// /// @notice Function to mint token with the given tokenUri.
+	// /// @dev `tokenId` should be obtained with `nextTokenId` method,
+	// ///  unlike standard, you can't specify it manually
+	// /// @param to The new owner
+	// /// @param tokenId ID of the minted NFT
+	// /// @param tokenUri Token URI that would be stored in the NFT properties
+	// /// @dev EVM selector for this function is: 0x50bb4e7f,
+	// ///  or in textual repr: mintWithTokenURI(address,uint256,string)
+	// function mintWithTokenURI(address to, uint256 tokenId, string memory tokenUri) external returns (bool);
 
 	/// @dev Not implemented
 	/// @dev EVM selector for this function is: 0x7d64bcb4,
@@ -308,8 +349,18 @@
 }
 
 /// @title Unique extensions for ERC721.
-/// @dev the ERC-165 identifier for this interface is 0xd74d154f
+/// @dev the ERC-165 identifier for this interface is 0x4468500d
 interface ERC721UniqueExtensions is Dummy, ERC165 {
+	/// @notice A descriptive name for a collection of NFTs in this contract
+	/// @dev EVM selector for this function is: 0x06fdde03,
+	///  or in textual repr: name()
+	function name() external view returns (string memory);
+
+	/// @notice An abbreviated name for NFTs in this contract
+	/// @dev EVM selector for this function is: 0x95d89b41,
+	///  or in textual repr: symbol()
+	function symbol() external view returns (string memory);
+
 	/// @notice Transfer ownership of an NFT
 	/// @dev Throws unless `msg.sender` is the current owner. Throws if `to`
 	///  is the zero address. Throws if `tokenId` is not a valid NFT.
@@ -350,11 +401,11 @@
 	/// @param tokens array of pairs of token ID and token URI for minted tokens
 	/// @dev EVM selector for this function is: 0x36543006,
 	///  or in textual repr: mintBulkWithTokenURI(address,(uint256,string)[])
-	function mintBulkWithTokenURI(address to, Tuple8[] memory tokens) external returns (bool);
+	function mintBulkWithTokenURI(address to, Tuple6[] memory tokens) external returns (bool);
 }
 
 /// @dev anonymous struct
-struct Tuple8 {
+struct Tuple6 {
 	uint256 field_0;
 	string field_1;
 }
@@ -384,34 +435,6 @@
 	function totalSupply() external view returns (uint256);
 }
 
-/// @title ERC-721 Non-Fungible Token Standard, optional metadata extension
-/// @dev See https://eips.ethereum.org/EIPS/eip-721
-/// @dev the ERC-165 identifier for this interface is 0x5b5e139f
-interface ERC721Metadata is Dummy, ERC165 {
-	/// @notice A descriptive name for a collection of NFTs in this contract
-	/// @dev EVM selector for this function is: 0x06fdde03,
-	///  or in textual repr: name()
-	function name() external view returns (string memory);
-
-	/// @notice An abbreviated name for NFTs in this contract
-	/// @dev EVM selector for this function is: 0x95d89b41,
-	///  or in textual repr: symbol()
-	function symbol() external view returns (string memory);
-
-	/// @notice A distinct Uniform Resource Identifier (URI) for a given asset.
-	///
-	/// @dev If the token has a `url` property and it is not empty, it is returned.
-	///  Else If the collection does not have a property with key `schemaName` or its value is not equal to `ERC721Metadata`, it return an error `tokenURI not set`.
-	///  If the collection property `baseURI` is empty or absent, return "" (empty string)
-	///  otherwise, if token property `suffix` present and is non-empty, return concatenation of baseURI and suffix
-	///  otherwise, return concatenation of `baseURI` and stringified token id (decimal stringifying, without paddings).
-	///
-	/// @return token's const_metadata
-	/// @dev EVM selector for this function is: 0xc87b56dd,
-	///  or in textual repr: tokenURI(uint256)
-	function tokenURI(uint256 tokenId) external view returns (string memory);
-}
-
 /// @dev inlined interface
 interface ERC721Events {
 	event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
@@ -507,11 +530,11 @@
 	Dummy,
 	ERC165,
 	ERC721,
-	ERC721Metadata,
 	ERC721Enumerable,
 	ERC721UniqueExtensions,
-	ERC721Mintable,
+	ERC721UniqueMintable,
 	ERC721Burnable,
+	ERC721Metadata,
 	Collection,
 	TokenProperties
 {}

--- a/tests/src/eth/api/UniqueRefungible.sol
+++ b/tests/src/eth/api/UniqueRefungible.sol
@@ -62,7 +62,7 @@
 }
 
 /// @title A contract that allows you to work with collections.
-/// @dev the ERC-165 identifier for this interface is 0x3e1e8083
+/// @dev the ERC-165 identifier for this interface is 0x62e22290
 interface Collection is Dummy, ERC165 {
 	/// Set collection property.
 	///
@@ -243,9 +243,9 @@
 	///
 	/// @dev Owner can be changed only by current owner
 	/// @param newOwner new owner account
-	/// @dev EVM selector for this function is: 0x13af4035,
-	///  or in textual repr: setOwner(address)
-	function setOwner(address newOwner) external;
+	/// @dev EVM selector for this function is: 0x4f53e226,
+	///  or in textual repr: changeCollectionOwner(address)
+	function changeCollectionOwner(address newOwner) external;
 }
 
 /// @dev anonymous struct
@@ -254,6 +254,34 @@
 	uint256 field_1;
 }
 
+/// @dev the ERC-165 identifier for this interface is 0x5b5e139f
+interface ERC721Metadata is Dummy, ERC165 {
+	// /// @notice A descriptive name for a collection of NFTs in this contract
+	// /// @dev real implementation of this function lies in `ERC721UniqueExtensions`
+	// /// @dev EVM selector for this function is: 0x06fdde03,
+	// ///  or in textual repr: name()
+	// function name() external view returns (string memory);
+
+	// /// @notice An abbreviated name for NFTs in this contract
+	// /// @dev real implementation of this function lies in `ERC721UniqueExtensions`
+	// /// @dev EVM selector for this function is: 0x95d89b41,
+	// ///  or in textual repr: symbol()
+	// function symbol() external view returns (string memory);
+
+	/// @notice A distinct Uniform Resource Identifier (URI) for a given asset.
+	///
+	/// @dev If the token has a `url` property and it is not empty, it is returned.
+	///  Else If the collection does not have a property with key `schemaName` or its value is not equal to `ERC721Metadata`, it return an error `tokenURI not set`.
+	///  If the collection property `baseURI` is empty or absent, return "" (empty string)
+	///  otherwise, if token property `suffix` present and is non-empty, return concatenation of baseURI and suffix
+	///  otherwise, return concatenation of `baseURI` and stringified token id (decimal stringifying, without paddings).
+	///
+	/// @return token's const_metadata
+	/// @dev EVM selector for this function is: 0xc87b56dd,
+	///  or in textual repr: tokenURI(uint256)
+	function tokenURI(uint256 tokenId) external view returns (string memory);
+}
+
 /// @title ERC721 Token that can be irreversibly burned (destroyed).
 /// @dev the ERC-165 identifier for this interface is 0x42966c68
 interface ERC721Burnable is Dummy, ERC165 {
@@ -267,40 +295,51 @@
 }
 
 /// @dev inlined interface
-interface ERC721MintableEvents {
+interface ERC721UniqueMintableEvents {
 	event MintingFinished();
 }
 
 /// @title ERC721 minting logic.
-/// @dev the ERC-165 identifier for this interface is 0x68ccfe89
-interface ERC721Mintable is Dummy, ERC165, ERC721MintableEvents {
+/// @dev the ERC-165 identifier for this interface is 0x476ff149
+interface ERC721UniqueMintable is Dummy, ERC165, ERC721UniqueMintableEvents {
 	/// @dev EVM selector for this function is: 0x05d2035b,
 	///  or in textual repr: mintingFinished()
 	function mintingFinished() external view returns (bool);
 
 	/// @notice Function to mint token.
-	/// @dev `tokenId` should be obtained with `nextTokenId` method,
-	///  unlike standard, you can't specify it manually
 	/// @param to The new owner
-	/// @param tokenId ID of the minted RFT
-	/// @dev EVM selector for this function is: 0x40c10f19,
-	///  or in textual repr: mint(address,uint256)
-	function mint(address to, uint256 tokenId) external returns (bool);
+	/// @return uint256 The id of the newly minted token
+	/// @dev EVM selector for this function is: 0x6a627842,
+	///  or in textual repr: mint(address)
+	function mint(address to) external returns (uint256);
+
+	// /// @notice Function to mint token.
+	// /// @dev `tokenId` should be obtained with `nextTokenId` method,
+	// ///  unlike standard, you can't specify it manually
+	// /// @param to The new owner
+	// /// @param tokenId ID of the minted RFT
+	// /// @dev EVM selector for this function is: 0x40c10f19,
+	// ///  or in textual repr: mint(address,uint256)
+	// function mint(address to, uint256 tokenId) external returns (bool);
 
 	/// @notice Function to mint token with the given tokenUri.
-	/// @dev `tokenId` should be obtained with `nextTokenId` method,
-	///  unlike standard, you can't specify it manually
 	/// @param to The new owner
-	/// @param tokenId ID of the minted RFT
-	/// @param tokenUri Token URI that would be stored in the RFT properties
-	/// @dev EVM selector for this function is: 0x50bb4e7f,
-	///  or in textual repr: mintWithTokenURI(address,uint256,string)
-	function mintWithTokenURI(
-		address to,
-		uint256 tokenId,
-		string memory tokenUri
-	) external returns (bool);
+	/// @param tokenUri Token URI that would be stored in the NFT properties
+	/// @return uint256 The id of the newly minted token
+	/// @dev EVM selector for this function is: 0x45c17782,
+	///  or in textual repr: mintWithTokenURI(address,string)
+	function mintWithTokenURI(address to, string memory tokenUri) external returns (uint256);
 
+	// /// @notice Function to mint token with the given tokenUri.
+	// /// @dev `tokenId` should be obtained with `nextTokenId` method,
+	// ///  unlike standard, you can't specify it manually
+	// /// @param to The new owner
+	// /// @param tokenId ID of the minted RFT
+	// /// @param tokenUri Token URI that would be stored in the RFT properties
+	// /// @dev EVM selector for this function is: 0x50bb4e7f,
+	// ///  or in textual repr: mintWithTokenURI(address,uint256,string)
+	// function mintWithTokenURI(address to, uint256 tokenId, string memory tokenUri) external returns (bool);
+
 	/// @dev Not implemented
 	/// @dev EVM selector for this function is: 0x7d64bcb4,
 	///  or in textual repr: finishMinting()
@@ -308,8 +347,18 @@
 }
 
 /// @title Unique extensions for ERC721.
-/// @dev the ERC-165 identifier for this interface is 0x7c3bef89
+/// @dev the ERC-165 identifier for this interface is 0xef1eaacb
 interface ERC721UniqueExtensions is Dummy, ERC165 {
+	/// @notice A descriptive name for a collection of NFTs in this contract
+	/// @dev EVM selector for this function is: 0x06fdde03,
+	///  or in textual repr: name()
+	function name() external view returns (string memory);
+
+	/// @notice An abbreviated name for NFTs in this contract
+	/// @dev EVM selector for this function is: 0x95d89b41,
+	///  or in textual repr: symbol()
+	function symbol() external view returns (string memory);
+
 	/// @notice Transfer ownership of an RFT
 	/// @dev Throws unless `msg.sender` is the current owner. Throws if `to`
 	///  is the zero address. Throws if `tokenId` is not a valid RFT.
@@ -352,7 +401,7 @@
 	/// @param tokens array of pairs of token ID and token URI for minted tokens
 	/// @dev EVM selector for this function is: 0x36543006,
 	///  or in textual repr: mintBulkWithTokenURI(address,(uint256,string)[])
-	function mintBulkWithTokenURI(address to, Tuple8[] memory tokens) external returns (bool);
+	function mintBulkWithTokenURI(address to, Tuple6[] memory tokens) external returns (bool);
 
 	/// Returns EVM address for refungible token
 	///
@@ -363,7 +412,7 @@
 }
 
 /// @dev anonymous struct
-struct Tuple8 {
+struct Tuple6 {
 	uint256 field_0;
 	string field_1;
 }
@@ -393,32 +442,6 @@
 	function totalSupply() external view returns (uint256);
 }
 
-/// @dev the ERC-165 identifier for this interface is 0x5b5e139f
-interface ERC721Metadata is Dummy, ERC165 {
-	/// @notice A descriptive name for a collection of RFTs in this contract
-	/// @dev EVM selector for this function is: 0x06fdde03,
-	///  or in textual repr: name()
-	function name() external view returns (string memory);
-
-	/// @notice An abbreviated name for RFTs in this contract
-	/// @dev EVM selector for this function is: 0x95d89b41,
-	///  or in textual repr: symbol()
-	function symbol() external view returns (string memory);
-
-	/// @notice A distinct Uniform Resource Identifier (URI) for a given asset.
-	///
-	/// @dev If the token has a `url` property and it is not empty, it is returned.
-	///  Else If the collection does not have a property with key `schemaName` or its value is not equal to `ERC721Metadata`, it return an error `tokenURI not set`.
-	///  If the collection property `baseURI` is empty or absent, return "" (empty string)
-	///  otherwise, if token property `suffix` present and is non-empty, return concatenation of baseURI and suffix
-	///  otherwise, return concatenation of `baseURI` and stringified token id (decimal stringifying, without paddings).
-	///
-	/// @return token's const_metadata
-	/// @dev EVM selector for this function is: 0xc87b56dd,
-	///  or in textual repr: tokenURI(uint256)
-	function tokenURI(uint256 tokenId) external view returns (string memory);
-}
-
 /// @dev inlined interface
 interface ERC721Events {
 	event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
@@ -512,11 +535,11 @@
 	Dummy,
 	ERC165,
 	ERC721,
-	ERC721Metadata,
 	ERC721Enumerable,
 	ERC721UniqueExtensions,
-	ERC721Mintable,
+	ERC721UniqueMintable,
 	ERC721Burnable,
+	ERC721Metadata,
 	Collection,
 	TokenProperties
 {}

--- a/tests/src/eth/base.test.ts
+++ b/tests/src/eth/base.test.ts
@@ -23,7 +23,7 @@
 describe('Contract calls', () => {
   let donor: IKeyringPair;
 
-  before(async function() {
+  before(async function () {
     await usingEthPlaygrounds(async (_helper, privateKey) => {
       donor = await privateKey({filename: __filename});
     });
@@ -40,7 +40,12 @@
   itEth('Balance transfer fee is less than 0.2 UNQ', async ({helper}) => {
     const userA = await helper.eth.createAccountWithBalance(donor);
     const userB = helper.eth.createAccount();
-    const cost = await helper.eth.calculateFee({Ethereum: userA}, () => helper.getWeb3().eth.sendTransaction({from: userA, to: userB, value: '1000000', gas: helper.eth.DEFAULT_GAS}));
+    const cost = await helper.eth.calculateFee({Ethereum: userA}, () => helper.getWeb3().eth.sendTransaction({
+      from: userA,
+      to: userB,
+      value: '1000000',
+      gas: helper.eth.DEFAULT_GAS
+    }));
     const balanceB = await helper.balance.getEthereum(userB);
     expect(cost - balanceB < BigInt(0.2 * Number(helper.balance.getOneTokenNominal()))).to.be.true;
   });
@@ -69,51 +74,59 @@
 describe('ERC165 tests', async () => {
   // https://eips.ethereum.org/EIPS/eip-165
 
-  let collection: number;
+  let erc721MetadataCompatibleNftCollectionId: number;
+  let simpleNftCollectionId: number;
   let minter: string;
 
-  function contract(helper: EthUniqueHelper): Contract {
-    return helper.ethNativeContract.collection(helper.ethAddress.fromCollectionId(collection), 'nft', minter);
+  const BASE_URI = 'base/';
+
+  async function checkInterface(helper: EthUniqueHelper, interfaceId: string, simpleResult: boolean, compatibleResult: boolean) {
+    const simple = helper.ethNativeContract.collection(helper.ethAddress.fromCollectionId(simpleNftCollectionId), 'nft', minter);
+    const compatible = helper.ethNativeContract.collection(helper.ethAddress.fromCollectionId(erc721MetadataCompatibleNftCollectionId), 'nft', minter);
+
+    expect(await simple.methods.supportsInterface(interfaceId).call()).to.equal(simpleResult, `empty (not ERC721Metadata compatible) NFT collection returns not ${simpleResult}`);
+    expect(await compatible.methods.supportsInterface(interfaceId).call()).to.equal(compatibleResult, `ERC721Metadata compatible NFT collection returns not ${compatibleResult}`);
   }
 
   before(async () => {
     await usingEthPlaygrounds(async (helper, privateKey) => {
       const donor = await privateKey({filename: __filename});
       const [alice] = await helper.arrange.createAccounts([10n], donor);
-      ({collectionId: collection} = await helper.nft.mintCollection(alice, {name: 'test', description: 'test', tokenPrefix: 'test'}));
+      ({collectionId: simpleNftCollectionId} = await helper.nft.mintCollection(alice, {name: 'test', description: 'test', tokenPrefix: 'test'}));
       minter = helper.eth.createAccount();
+      ({collectionId: erc721MetadataCompatibleNftCollectionId} = await helper.eth.createERC721MetadataCompatibleNFTCollection(minter, 'n', 'd', 'p', BASE_URI));
     });
   });
 
-  itEth('interfaceID == 0xffffffff always false', async ({helper}) => {
-    expect(await contract(helper).methods.supportsInterface('0xffffffff').call()).to.be.false;
+  itEth('nonexistent interfaceID - 0xffffffff - always false', async ({helper}) => {
+    await checkInterface(helper, '0xffffffff', false, false);
   });
 
-  itEth('ERC721 support', async ({helper}) => {
-    expect(await contract(helper).methods.supportsInterface('0x780e9d63').call()).to.be.true;
+  itEth('ERC721 - 0x780e9d63 - support', async ({helper}) => {
+    await checkInterface(helper, '0x780e9d63', true, true);
   });
 
-  itEth('ERC721Metadata support', async ({helper}) => {
-    expect(await contract(helper).methods.supportsInterface('0x5b5e139f').call()).to.be.true;
+  itEth('ERC721Metadata - 0x5b5e139f - support', async ({helper}) => {
+    await checkInterface(helper, '0x5b5e139f', false, true);
   });
 
-  itEth('ERC721Mintable support', async ({helper}) => {
-    expect(await contract(helper).methods.supportsInterface('0x68ccfe89').call()).to.be.true;
+  itEth('ERC721UniqueMintable - 0x476ff149 - support', async ({helper}) => {
+    await checkInterface(helper, '0x476ff149', true, true);
   });
 
-  itEth('ERC721Enumerable support', async ({helper}) => {
-    expect(await contract(helper).methods.supportsInterface('0x780e9d63').call()).to.be.true;
+  itEth('ERC721Enumerable - 0x780e9d63 - support', async ({helper}) => {
+    await checkInterface(helper, '0x780e9d63', true, true);
   });
 
-  itEth('ERC721UniqueExtensions support', async ({helper}) => {
-    expect(await contract(helper).methods.supportsInterface('0xd74d154f').call()).to.be.true;
+  itEth('ERC721UniqueExtensions - 0x4468500d - support', async ({helper}) => {
+    await checkInterface(helper, '0x4468500d', true, true);
   });
 
-  itEth('ERC721Burnable support', async ({helper}) => {
-    expect(await contract(helper).methods.supportsInterface('0x42966c68').call()).to.be.true;
+  itEth('ERC721Burnable - 0x42966c68 - support', async ({helper}) => {
+    await checkInterface(helper, '0x42966c68', true, true);
   });
 
-  itEth('ERC165 support', async ({helper}) => {
-    expect(await contract(helper).methods.supportsInterface('0x01ffc9a7').call()).to.be.true;
+  itEth('ERC165 - 0x01ffc9a7 - support', async ({helper}) => {
+    await checkInterface(helper, '0x01ffc9a7', true, true);
   });
 });