git.delta.rocks / unique-network / refs/commits / b24c73be918e

difftreelog

feature(common-pallet): add changeOwner method

Grigoriy Simonov2022-08-23parent: #565dfea.patch.diff
in: master

14 files changed

modifiedpallets/common/src/erc.rsdiffbeforeafterboth
before · pallets/common/src/erc.rs
1// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.2// This file is part of Unique Network.34// Unique Network is free software: you can redistribute it and/or modify5// it under the terms of the GNU General Public License as published by6// the Free Software Foundation, either version 3 of the License, or7// (at your option) any later version.89// Unique Network is distributed in the hope that it will be useful,10// but WITHOUT ANY WARRANTY; without even the implied warranty of11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the12// GNU General Public License for more details.1314// You should have received a copy of the GNU General Public License15// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.1617//! This module contains the implementation of pallet methods for evm.1819use evm_coder::{20	solidity_interface, solidity, ToLog,21	types::*,22	execution::{Result, Error},23};24pub use pallet_evm::{PrecompileOutput, PrecompileResult, PrecompileHandle, account::CrossAccountId};25use pallet_evm_coder_substrate::dispatch_to_evm;26use sp_std::vec::Vec;27use up_data_structs::{28	AccessMode, CollectionMode, CollectionPermissions, OwnerRestrictedSet, Property,29	SponsoringRateLimit,30};31use alloc::format;3233use crate::{Pallet, CollectionHandle, Config, CollectionProperties};3435/// Events for ethereum collection helper.36#[derive(ToLog)]37pub enum CollectionHelpersEvents {38	/// The collection has been created.39	CollectionCreated {40		/// Collection owner.41		#[indexed]42		owner: address,4344		/// Collection ID.45		#[indexed]46		collection_id: address,47	},48}4950/// Does not always represent a full collection, for RFT it is either51/// collection (Implementing ERC721), or specific collection token (Implementing ERC20).52pub trait CommonEvmHandler {53	const CODE: &'static [u8];5455	/// Call precompiled handle.56	fn call(self, handle: &mut impl PrecompileHandle) -> Option<PrecompileResult>;57}5859/// @title A contract that allows you to work with collections.60#[solidity_interface(name = "Collection")]61impl<T: Config> CollectionHandle<T>62where63	T::AccountId: From<[u8; 32]>,64{65	/// Set collection property.66	///67	/// @param key Property key.68	/// @param value Propery value.69	fn set_collection_property(70		&mut self,71		caller: caller,72		key: string,73		value: bytes,74	) -> Result<void> {75		let caller = T::CrossAccountId::from_eth(caller);76		let key = <Vec<u8>>::from(key)77			.try_into()78			.map_err(|_| "key too large")?;79		let value = value.try_into().map_err(|_| "value too large")?;8081		<Pallet<T>>::set_collection_property(self, &caller, Property { key, value })82			.map_err(dispatch_to_evm::<T>)83	}8485	/// Delete collection property.86	///87	/// @param key Property key.88	fn delete_collection_property(&mut self, caller: caller, key: string) -> Result<()> {89		let caller = T::CrossAccountId::from_eth(caller);90		let key = <Vec<u8>>::from(key)91			.try_into()92			.map_err(|_| "key too large")?;9394		<Pallet<T>>::delete_collection_property(self, &caller, key).map_err(dispatch_to_evm::<T>)95	}9697	/// Get collection property.98	///99	/// @dev Throws error if key not found.100	///101	/// @param key Property key.102	/// @return bytes The property corresponding to the key.103	fn collection_property(&self, key: string) -> Result<bytes> {104		let key = <Vec<u8>>::from(key)105			.try_into()106			.map_err(|_| "key too large")?;107108		let props = <CollectionProperties<T>>::get(self.id);109		let prop = props.get(&key).ok_or("key not found")?;110111		Ok(prop.to_vec())112	}113114	/// Set the sponsor of the collection.115	///116	/// @dev In order for sponsorship to work, it must be confirmed on behalf of the sponsor.117	///118	/// @param sponsor Address of the sponsor from whose account funds will be debited for operations with the contract.119	fn set_collection_sponsor(&mut self, caller: caller, sponsor: address) -> Result<void> {120		check_is_owner_or_admin(caller, self)?;121122		let sponsor = T::CrossAccountId::from_eth(sponsor);123		self.set_sponsor(sponsor.as_sub().clone())124			.map_err(dispatch_to_evm::<T>)?;125		save(self)126	}127128	/// Collection sponsorship confirmation.129	///130	/// @dev After setting the sponsor for the collection, it must be confirmed with this function.131	fn confirm_collection_sponsorship(&mut self, caller: caller) -> Result<void> {132		let caller = T::CrossAccountId::from_eth(caller);133		if !self134			.confirm_sponsorship(caller.as_sub())135			.map_err(dispatch_to_evm::<T>)?136		{137			return Err("caller is not set as sponsor".into());138		}139		save(self)140	}141142	/// Set limits for the collection.143	/// @dev Throws error if limit not found.144	/// @param limit Name of the limit. Valid names:145	/// 	"accountTokenOwnershipLimit",146	/// 	"sponsoredDataSize",147	/// 	"sponsoredDataRateLimit",148	/// 	"tokenLimit",149	/// 	"sponsorTransferTimeout",150	/// 	"sponsorApproveTimeout"151	/// @param value Value of the limit.152	#[solidity(rename_selector = "setCollectionLimit")]153	fn set_int_limit(&mut self, caller: caller, limit: string, value: uint32) -> Result<void> {154		check_is_owner_or_admin(caller, self)?;155		let mut limits = self.limits.clone();156157		match limit.as_str() {158			"accountTokenOwnershipLimit" => {159				limits.account_token_ownership_limit = Some(value);160			}161			"sponsoredDataSize" => {162				limits.sponsored_data_size = Some(value);163			}164			"sponsoredDataRateLimit" => {165				limits.sponsored_data_rate_limit = Some(SponsoringRateLimit::Blocks(value));166			}167			"tokenLimit" => {168				limits.token_limit = Some(value);169			}170			"sponsorTransferTimeout" => {171				limits.sponsor_transfer_timeout = Some(value);172			}173			"sponsorApproveTimeout" => {174				limits.sponsor_approve_timeout = Some(value);175			}176			_ => {177				return Err(Error::Revert(format!(178					"unknown integer limit \"{}\"",179					limit180				)))181			}182		}183		self.limits = <Pallet<T>>::clamp_limits(self.mode.clone(), &self.limits, limits)184			.map_err(dispatch_to_evm::<T>)?;185		save(self)186	}187188	/// Set limits for the collection.189	/// @dev Throws error if limit not found.190	/// @param limit Name of the limit. Valid names:191	/// 	"ownerCanTransfer",192	/// 	"ownerCanDestroy",193	/// 	"transfersEnabled"194	/// @param value Value of the limit.195	#[solidity(rename_selector = "setCollectionLimit")]196	fn set_bool_limit(&mut self, caller: caller, limit: string, value: bool) -> Result<void> {197		check_is_owner_or_admin(caller, self)?;198		let mut limits = self.limits.clone();199200		match limit.as_str() {201			"ownerCanTransfer" => {202				limits.owner_can_transfer = Some(value);203			}204			"ownerCanDestroy" => {205				limits.owner_can_destroy = Some(value);206			}207			"transfersEnabled" => {208				limits.transfers_enabled = Some(value);209			}210			_ => {211				return Err(Error::Revert(format!(212					"unknown boolean limit \"{}\"",213					limit214				)))215			}216		}217		self.limits = <Pallet<T>>::clamp_limits(self.mode.clone(), &self.limits, limits)218			.map_err(dispatch_to_evm::<T>)?;219		save(self)220	}221222	/// Get contract address.223	fn contract_address(&self, _caller: caller) -> Result<address> {224		Ok(crate::eth::collection_id_to_address(self.id))225	}226227	/// Add collection admin by substrate address.228	/// @param new_admin Substrate administrator address.229	fn add_collection_admin_substrate(230		&mut self,231		caller: caller,232		new_admin: uint256,233	) -> Result<void> {234		let caller = T::CrossAccountId::from_eth(caller);235		let mut new_admin_arr: [u8; 32] = Default::default();236		new_admin.to_big_endian(&mut new_admin_arr);237		let account_id = T::AccountId::from(new_admin_arr);238		let new_admin = T::CrossAccountId::from_sub(account_id);239		<Pallet<T>>::toggle_admin(self, &caller, &new_admin, true).map_err(dispatch_to_evm::<T>)?;240		Ok(())241	}242243	/// Remove collection admin by substrate address.244	/// @param admin Substrate administrator address.245	fn remove_collection_admin_substrate(246		&mut self,247		caller: caller,248		admin: uint256,249	) -> Result<void> {250		let caller = T::CrossAccountId::from_eth(caller);251		let mut admin_arr: [u8; 32] = Default::default();252		admin.to_big_endian(&mut admin_arr);253		let account_id = T::AccountId::from(admin_arr);254		let admin = T::CrossAccountId::from_sub(account_id);255		<Pallet<T>>::toggle_admin(self, &caller, &admin, false).map_err(dispatch_to_evm::<T>)?;256		Ok(())257	}258259	/// Add collection admin.260	/// @param new_admin Address of the added administrator.261	fn add_collection_admin(&mut self, caller: caller, new_admin: address) -> Result<void> {262		let caller = T::CrossAccountId::from_eth(caller);263		let new_admin = T::CrossAccountId::from_eth(new_admin);264		<Pallet<T>>::toggle_admin(self, &caller, &new_admin, true).map_err(dispatch_to_evm::<T>)?;265		Ok(())266	}267268	/// Remove collection admin.269	///270	/// @param new_admin Address of the removed administrator.271	fn remove_collection_admin(&mut self, caller: caller, admin: address) -> Result<void> {272		let caller = T::CrossAccountId::from_eth(caller);273		let admin = T::CrossAccountId::from_eth(admin);274		<Pallet<T>>::toggle_admin(self, &caller, &admin, false).map_err(dispatch_to_evm::<T>)?;275		Ok(())276	}277278	/// Toggle accessibility of collection nesting.279	///280	/// @param enable If "true" degenerates to nesting: 'Owner' else to nesting: 'Disabled'281	#[solidity(rename_selector = "setCollectionNesting")]282	fn set_nesting_bool(&mut self, caller: caller, enable: bool) -> Result<void> {283		check_is_owner_or_admin(caller, self)?;284285		let mut permissions = self.collection.permissions.clone();286		let mut nesting = permissions.nesting().clone();287		nesting.token_owner = enable;288		nesting.restricted = None;289		permissions.nesting = Some(nesting);290291		self.collection.permissions = <Pallet<T>>::clamp_permissions(292			self.collection.mode.clone(),293			&self.collection.permissions,294			permissions,295		)296		.map_err(dispatch_to_evm::<T>)?;297298		save(self)299	}300301	/// Toggle accessibility of collection nesting.302	///303	/// @param enable If "true" degenerates to nesting: {OwnerRestricted: [1, 2, 3]} else to nesting: 'Disabled'304	/// @param collections Addresses of collections that will be available for nesting.305	#[solidity(rename_selector = "setCollectionNesting")]306	fn set_nesting(307		&mut self,308		caller: caller,309		enable: bool,310		collections: Vec<address>,311	) -> Result<void> {312		if collections.is_empty() {313			return Err("no addresses provided".into());314		}315		check_is_owner_or_admin(caller, self)?;316317		let mut permissions = self.collection.permissions.clone();318		match enable {319			false => {320				let mut nesting = permissions.nesting().clone();321				nesting.token_owner = false;322				nesting.restricted = None;323				permissions.nesting = Some(nesting);324			}325			true => {326				let mut bv = OwnerRestrictedSet::new();327				for i in collections {328					bv.try_insert(crate::eth::map_eth_to_id(&i).ok_or(Error::Revert(329						"Can't convert address into collection id".into(),330					))?)331					.map_err(|_| "too many collections")?;332				}333				let mut nesting = permissions.nesting().clone();334				nesting.token_owner = true;335				nesting.restricted = Some(bv);336				permissions.nesting = Some(nesting);337			}338		};339340		self.collection.permissions = <Pallet<T>>::clamp_permissions(341			self.collection.mode.clone(),342			&self.collection.permissions,343			permissions,344		)345		.map_err(dispatch_to_evm::<T>)?;346347		save(self)348	}349350	/// Set the collection access method.351	/// @param mode Access mode352	/// 	0 for Normal353	/// 	1 for AllowList354	fn set_collection_access(&mut self, caller: caller, mode: uint8) -> Result<void> {355		check_is_owner_or_admin(caller, self)?;356		let permissions = CollectionPermissions {357			access: Some(match mode {358				0 => AccessMode::Normal,359				1 => AccessMode::AllowList,360				_ => return Err("not supported access mode".into()),361			}),362			..Default::default()363		};364		self.collection.permissions = <Pallet<T>>::clamp_permissions(365			self.collection.mode.clone(),366			&self.collection.permissions,367			permissions,368		)369		.map_err(dispatch_to_evm::<T>)?;370371		save(self)372	}373374	/// Add the user to the allowed list.375	///376	/// @param user Address of a trusted user.377	fn add_to_collection_allow_list(&mut self, caller: caller, user: address) -> Result<void> {378		let caller = T::CrossAccountId::from_eth(caller);379		let user = T::CrossAccountId::from_eth(user);380		<Pallet<T>>::toggle_allowlist(self, &caller, &user, true).map_err(dispatch_to_evm::<T>)?;381		Ok(())382	}383384	/// Remove the user from the allowed list.385	///386	/// @param user Address of a removed user.387	fn remove_from_collection_allow_list(&mut self, caller: caller, user: address) -> Result<void> {388		let caller = T::CrossAccountId::from_eth(caller);389		let user = T::CrossAccountId::from_eth(user);390		<Pallet<T>>::toggle_allowlist(self, &caller, &user, false).map_err(dispatch_to_evm::<T>)?;391		Ok(())392	}393394	/// Switch permission for minting.395	///396	/// @param mode Enable if "true".397	fn set_collection_mint_mode(&mut self, caller: caller, mode: bool) -> Result<void> {398		check_is_owner_or_admin(caller, self)?;399		let permissions = CollectionPermissions {400			mint_mode: Some(mode),401			..Default::default()402		};403		self.collection.permissions = <Pallet<T>>::clamp_permissions(404			self.collection.mode.clone(),405			&self.collection.permissions,406			permissions,407		)408		.map_err(dispatch_to_evm::<T>)?;409410		save(self)411	}412413	/// Check that account is the owner or admin of the collection414	///415	/// @param user account to verify416	/// @return "true" if account is the owner or admin417	fn verify_owner_or_admin(&self, user: address) -> Result<bool> {418		Ok(check_is_owner_or_admin(user, self)419			.map(|_| true)420			.unwrap_or(false))421	}422423	/// Returns collection type424	///425	/// @return `Fungible` or `NFT` or `ReFungible`426	fn unique_collection_type(&mut self) -> Result<string> {427		let mode = match self.collection.mode {428			CollectionMode::Fungible(_) => "Fungible",429			CollectionMode::NFT => "NFT",430			CollectionMode::ReFungible => "ReFungible",431		};432		Ok(mode.into())433	}434}435436fn check_is_owner_or_admin<T: Config>(437	caller: caller,438	collection: &CollectionHandle<T>,439) -> Result<T::CrossAccountId> {440	let caller = T::CrossAccountId::from_eth(caller);441	collection442		.check_is_owner_or_admin(&caller)443		.map_err(pallet_evm_coder_substrate::dispatch_to_evm::<T>)?;444	Ok(caller)445}446447fn save<T: Config>(collection: &CollectionHandle<T>) -> Result<void> {448	// TODO possibly delete for the lack of transaction449	collection450		.check_is_internal()451		.map_err(dispatch_to_evm::<T>)?;452	<crate::CollectionById<T>>::insert(collection.id, collection.collection.clone());453	Ok(())454}455456/// Contains static property keys and values.457pub mod static_property {458	use evm_coder::{459		execution::{Result, Error},460	};461	use alloc::format;462463	const EXPECT_CONVERT_ERROR: &str = "length < limit";464465	/// Keys.466	pub mod key {467		use super::*;468469		/// Key "schemaName".470		pub fn schema_name() -> up_data_structs::PropertyKey {471			property_key_from_bytes(b"schemaName").expect(EXPECT_CONVERT_ERROR)472		}473474		/// Key "baseURI".475		pub fn base_uri() -> up_data_structs::PropertyKey {476			property_key_from_bytes(b"baseURI").expect(EXPECT_CONVERT_ERROR)477		}478479		/// Key "url".480		pub fn url() -> up_data_structs::PropertyKey {481			property_key_from_bytes(b"url").expect(EXPECT_CONVERT_ERROR)482		}483484		/// Key "suffix".485		pub fn suffix() -> up_data_structs::PropertyKey {486			property_key_from_bytes(b"suffix").expect(EXPECT_CONVERT_ERROR)487		}488489		/// Key "parentNft".490		pub fn parent_nft() -> up_data_structs::PropertyKey {491			property_key_from_bytes(b"parentNft").expect(EXPECT_CONVERT_ERROR)492		}493	}494495	/// Values.496	pub mod value {497		use super::*;498499		/// Value "ERC721Metadata".500		pub const ERC721_METADATA: &[u8] = b"ERC721Metadata";501502		/// Value for [`ERC721_METADATA`].503		pub fn erc721() -> up_data_structs::PropertyValue {504			property_value_from_bytes(ERC721_METADATA).expect(EXPECT_CONVERT_ERROR)505		}506	}507508	/// Convert `byte` to [`PropertyKey`].509	pub fn property_key_from_bytes(bytes: &[u8]) -> Result<up_data_structs::PropertyKey> {510		bytes.to_vec().try_into().map_err(|_| {511			Error::Revert(format!(512				"Property key is too long. Max length is {}.",513				up_data_structs::PropertyKey::bound()514			))515		})516	}517518	/// Convert `bytes` to [`PropertyValue`].519	pub fn property_value_from_bytes(bytes: &[u8]) -> Result<up_data_structs::PropertyValue> {520		bytes.to_vec().try_into().map_err(|_| {521			Error::Revert(format!(522				"Property key is too long. Max length is {}.",523				up_data_structs::PropertyKey::bound()524			))525		})526	}527}
modifiedpallets/fungible/src/stubs/UniqueFungible.rawdiffbeforeafterboth

binary blob — no preview

modifiedpallets/fungible/src/stubs/UniqueFungible.soldiffbeforeafterboth
--- a/pallets/fungible/src/stubs/UniqueFungible.sol
+++ b/pallets/fungible/src/stubs/UniqueFungible.sol
@@ -31,7 +31,103 @@
 	);
 }
 
-// Selector: 6cf113cd
+// Selector: 79cc6790
+contract ERC20UniqueExtensions is Dummy, ERC165 {
+	// Selector: burnFrom(address,uint256) 79cc6790
+	function burnFrom(address from, uint256 amount) public returns (bool) {
+		require(false, stub_error);
+		from;
+		amount;
+		dummy = 0;
+		return false;
+	}
+}
+
+// Selector: 942e8b22
+contract ERC20 is Dummy, ERC165, ERC20Events {
+	// Selector: name() 06fdde03
+	function name() public view returns (string memory) {
+		require(false, stub_error);
+		dummy;
+		return "";
+	}
+
+	// Selector: symbol() 95d89b41
+	function symbol() public view returns (string memory) {
+		require(false, stub_error);
+		dummy;
+		return "";
+	}
+
+	// Selector: totalSupply() 18160ddd
+	function totalSupply() public view returns (uint256) {
+		require(false, stub_error);
+		dummy;
+		return 0;
+	}
+
+	// Selector: decimals() 313ce567
+	function decimals() public view returns (uint8) {
+		require(false, stub_error);
+		dummy;
+		return 0;
+	}
+
+	// Selector: balanceOf(address) 70a08231
+	function balanceOf(address owner) public view returns (uint256) {
+		require(false, stub_error);
+		owner;
+		dummy;
+		return 0;
+	}
+
+	// Selector: transfer(address,uint256) a9059cbb
+	function transfer(address to, uint256 amount) public returns (bool) {
+		require(false, stub_error);
+		to;
+		amount;
+		dummy = 0;
+		return false;
+	}
+
+	// Selector: transferFrom(address,address,uint256) 23b872dd
+	function transferFrom(
+		address from,
+		address to,
+		uint256 amount
+	) public returns (bool) {
+		require(false, stub_error);
+		from;
+		to;
+		amount;
+		dummy = 0;
+		return false;
+	}
+
+	// Selector: approve(address,uint256) 095ea7b3
+	function approve(address spender, uint256 amount) public returns (bool) {
+		require(false, stub_error);
+		spender;
+		amount;
+		dummy = 0;
+		return false;
+	}
+
+	// Selector: allowance(address,address) dd62ed3e
+	function allowance(address owner, address spender)
+		public
+		view
+		returns (uint256)
+	{
+		require(false, stub_error);
+		owner;
+		spender;
+		dummy;
+		return 0;
+	}
+}
+
+// Selector: ca08c92c
 contract Collection is Dummy, ERC165 {
 	// Set collection property.
 	//
@@ -276,105 +372,21 @@
 	//
 	// Selector: uniqueCollectionType() d34b55b8
 	function uniqueCollectionType() public returns (string memory) {
-		require(false, stub_error);
-		dummy = 0;
-		return "";
-	}
-}
-
-// Selector: 79cc6790
-contract ERC20UniqueExtensions is Dummy, ERC165 {
-	// Selector: burnFrom(address,uint256) 79cc6790
-	function burnFrom(address from, uint256 amount) public returns (bool) {
 		require(false, stub_error);
-		from;
-		amount;
 		dummy = 0;
-		return false;
-	}
-}
-
-// Selector: 942e8b22
-contract ERC20 is Dummy, ERC165, ERC20Events {
-	// Selector: name() 06fdde03
-	function name() public view returns (string memory) {
-		require(false, stub_error);
-		dummy;
-		return "";
-	}
-
-	// Selector: symbol() 95d89b41
-	function symbol() public view returns (string memory) {
-		require(false, stub_error);
-		dummy;
 		return "";
-	}
-
-	// Selector: totalSupply() 18160ddd
-	function totalSupply() public view returns (uint256) {
-		require(false, stub_error);
-		dummy;
-		return 0;
-	}
-
-	// Selector: decimals() 313ce567
-	function decimals() public view returns (uint8) {
-		require(false, stub_error);
-		dummy;
-		return 0;
-	}
-
-	// Selector: balanceOf(address) 70a08231
-	function balanceOf(address owner) public view returns (uint256) {
-		require(false, stub_error);
-		owner;
-		dummy;
-		return 0;
 	}
 
-	// Selector: transfer(address,uint256) a9059cbb
-	function transfer(address to, uint256 amount) public returns (bool) {
-		require(false, stub_error);
-		to;
-		amount;
-		dummy = 0;
-		return false;
-	}
-
-	// Selector: transferFrom(address,address,uint256) 23b872dd
-	function transferFrom(
-		address from,
-		address to,
-		uint256 amount
-	) public returns (bool) {
-		require(false, stub_error);
-		from;
-		to;
-		amount;
-		dummy = 0;
-		return false;
-	}
-
-	// Selector: approve(address,uint256) 095ea7b3
-	function approve(address spender, uint256 amount) public returns (bool) {
+	// Changes collection owner
+	//
+	// @dev Owner can be changed only by current owner
+	// @param newOwner new owner
+	//
+	// Selector: changeOwner(address) a6f9dae1
+	function changeOwner(address newOwner) public {
 		require(false, stub_error);
-		spender;
-		amount;
+		newOwner;
 		dummy = 0;
-		return false;
-	}
-
-	// Selector: allowance(address,address) dd62ed3e
-	function allowance(address owner, address spender)
-		public
-		view
-		returns (uint256)
-	{
-		require(false, stub_error);
-		owner;
-		spender;
-		dummy;
-		return 0;
 	}
 }
 
modifiedpallets/nonfungible/src/stubs/UniqueNFT.rawdiffbeforeafterboth

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modifiedpallets/nonfungible/src/stubs/UniqueNFT.soldiffbeforeafterboth
--- a/pallets/nonfungible/src/stubs/UniqueNFT.sol
+++ b/pallets/nonfungible/src/stubs/UniqueNFT.sol
@@ -373,7 +373,49 @@
 	}
 }
 
-// Selector: 6cf113cd
+// Selector: 780e9d63
+contract ERC721Enumerable is Dummy, ERC165 {
+	// @notice Enumerate valid NFTs
+	// @param index A counter less than `totalSupply()`
+	// @return The token identifier for the `index`th NFT,
+	//  (sort order not specified)
+	//
+	// Selector: tokenByIndex(uint256) 4f6ccce7
+	function tokenByIndex(uint256 index) public view returns (uint256) {
+		require(false, stub_error);
+		index;
+		dummy;
+		return 0;
+	}
+
+	// @dev Not implemented
+	//
+	// Selector: tokenOfOwnerByIndex(address,uint256) 2f745c59
+	function tokenOfOwnerByIndex(address owner, uint256 index)
+		public
+		view
+		returns (uint256)
+	{
+		require(false, stub_error);
+		owner;
+		index;
+		dummy;
+		return 0;
+	}
+
+	// @notice Count NFTs tracked by this contract
+	// @return A count of valid NFTs tracked by this contract, where each one of
+	//  them has an assigned and queryable owner not equal to the zero address
+	//
+	// Selector: totalSupply() 18160ddd
+	function totalSupply() public view returns (uint256) {
+		require(false, stub_error);
+		dummy;
+		return 0;
+	}
+}
+
+// Selector: ca08c92c
 contract Collection is Dummy, ERC165 {
 	// Set collection property.
 	//
@@ -622,47 +664,17 @@
 		dummy = 0;
 		return "";
 	}
-}
 
-// Selector: 780e9d63
-contract ERC721Enumerable is Dummy, ERC165 {
-	// @notice Enumerate valid NFTs
-	// @param index A counter less than `totalSupply()`
-	// @return The token identifier for the `index`th NFT,
-	//  (sort order not specified)
+	// Changes collection owner
 	//
-	// Selector: tokenByIndex(uint256) 4f6ccce7
-	function tokenByIndex(uint256 index) public view returns (uint256) {
-		require(false, stub_error);
-		index;
-		dummy;
-		return 0;
-	}
-
-	// @dev Not implemented
+	// @dev Owner can be changed only by current owner
+	// @param newOwner new owner
 	//
-	// Selector: tokenOfOwnerByIndex(address,uint256) 2f745c59
-	function tokenOfOwnerByIndex(address owner, uint256 index)
-		public
-		view
-		returns (uint256)
-	{
+	// Selector: changeOwner(address) a6f9dae1
+	function changeOwner(address newOwner) public {
 		require(false, stub_error);
-		owner;
-		index;
-		dummy;
-		return 0;
-	}
-
-	// @notice Count NFTs tracked by this contract
-	// @return A count of valid NFTs tracked by this contract, where each one of
-	//  them has an assigned and queryable owner not equal to the zero address
-	//
-	// Selector: totalSupply() 18160ddd
-	function totalSupply() public view returns (uint256) {
-		require(false, stub_error);
-		dummy;
-		return 0;
+		newOwner;
+		dummy = 0;
 	}
 }
 
modifiedpallets/refungible/src/stubs/UniqueRefungible.rawdiffbeforeafterboth

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modifiedpallets/refungible/src/stubs/UniqueRefungible.soldiffbeforeafterboth
--- a/pallets/refungible/src/stubs/UniqueRefungible.sol
+++ b/pallets/refungible/src/stubs/UniqueRefungible.sol
@@ -371,7 +371,142 @@
 	}
 }
 
-// Selector: 6cf113cd
+// Selector: 780e9d63
+contract ERC721Enumerable is Dummy, ERC165 {
+	// @notice Enumerate valid RFTs
+	// @param index A counter less than `totalSupply()`
+	// @return The token identifier for the `index`th NFT,
+	//  (sort order not specified)
+	//
+	// Selector: tokenByIndex(uint256) 4f6ccce7
+	function tokenByIndex(uint256 index) public view returns (uint256) {
+		require(false, stub_error);
+		index;
+		dummy;
+		return 0;
+	}
+
+	// Not implemented
+	//
+	// Selector: tokenOfOwnerByIndex(address,uint256) 2f745c59
+	function tokenOfOwnerByIndex(address owner, uint256 index)
+		public
+		view
+		returns (uint256)
+	{
+		require(false, stub_error);
+		owner;
+		index;
+		dummy;
+		return 0;
+	}
+
+	// @notice Count RFTs tracked by this contract
+	// @return A count of valid RFTs tracked by this contract, where each one of
+	//  them has an assigned and queryable owner not equal to the zero address
+	//
+	// Selector: totalSupply() 18160ddd
+	function totalSupply() public view returns (uint256) {
+		require(false, stub_error);
+		dummy;
+		return 0;
+	}
+}
+
+// Selector: 7c3bef89
+contract ERC721UniqueExtensions is Dummy, ERC165 {
+	// @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.
+	//  Throws if RFT pieces have multiple owners.
+	// @param to The new owner
+	// @param tokenId The RFT to transfer
+	// @param _value Not used for an RFT
+	//
+	// Selector: transfer(address,uint256) a9059cbb
+	function transfer(address to, uint256 tokenId) public {
+		require(false, stub_error);
+		to;
+		tokenId;
+		dummy = 0;
+	}
+
+	// @notice Burns a specific ERC721 token.
+	// @dev Throws unless `msg.sender` is the current owner or an authorized
+	//  operator for this RFT. Throws if `from` is not the current owner. Throws
+	//  if `to` is the zero address. Throws if `tokenId` is not a valid RFT.
+	//  Throws if RFT pieces have multiple owners.
+	// @param from The current owner of the RFT
+	// @param tokenId The RFT to transfer
+	// @param _value Not used for an RFT
+	//
+	// Selector: burnFrom(address,uint256) 79cc6790
+	function burnFrom(address from, uint256 tokenId) public {
+		require(false, stub_error);
+		from;
+		tokenId;
+		dummy = 0;
+	}
+
+	// @notice Returns next free RFT ID.
+	//
+	// Selector: nextTokenId() 75794a3c
+	function nextTokenId() public view returns (uint256) {
+		require(false, stub_error);
+		dummy;
+		return 0;
+	}
+
+	// @notice Function to mint multiple tokens.
+	// @dev `tokenIds` should be an array of consecutive numbers and first number
+	//  should be obtained with `nextTokenId` method
+	// @param to The new owner
+	// @param tokenIds IDs of the minted RFTs
+	//
+	// Selector: mintBulk(address,uint256[]) 44a9945e
+	function mintBulk(address to, uint256[] memory tokenIds)
+		public
+		returns (bool)
+	{
+		require(false, stub_error);
+		to;
+		tokenIds;
+		dummy = 0;
+		return false;
+	}
+
+	// @notice Function to mint multiple tokens with the given tokenUris.
+	// @dev `tokenIds` is array of pairs of token ID and token URI. Token IDs should be consecutive
+	//  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
+	//
+	// Selector: mintBulkWithTokenURI(address,(uint256,string)[]) 36543006
+	function mintBulkWithTokenURI(address to, Tuple0[] memory tokens)
+		public
+		returns (bool)
+	{
+		require(false, stub_error);
+		to;
+		tokens;
+		dummy = 0;
+		return false;
+	}
+
+	// Returns EVM address for refungible token
+	//
+	// @param token ID of the token
+	//
+	// Selector: tokenContractAddress(uint256) ab76fac6
+	function tokenContractAddress(uint256 token) public view returns (address) {
+		require(false, stub_error);
+		token;
+		dummy;
+		return 0x0000000000000000000000000000000000000000;
+	}
+}
+
+// Selector: ca08c92c
 contract Collection is Dummy, ERC165 {
 	// Set collection property.
 	//
@@ -620,140 +755,17 @@
 		dummy = 0;
 		return "";
 	}
-}
 
-// Selector: 780e9d63
-contract ERC721Enumerable is Dummy, ERC165 {
-	// @notice Enumerate valid RFTs
-	// @param index A counter less than `totalSupply()`
-	// @return The token identifier for the `index`th NFT,
-	//  (sort order not specified)
+	// Changes collection owner
 	//
-	// Selector: tokenByIndex(uint256) 4f6ccce7
-	function tokenByIndex(uint256 index) public view returns (uint256) {
-		require(false, stub_error);
-		index;
-		dummy;
-		return 0;
-	}
-
-	// Not implemented
+	// @dev Owner can be changed only by current owner
+	// @param newOwner new owner
 	//
-	// Selector: tokenOfOwnerByIndex(address,uint256) 2f745c59
-	function tokenOfOwnerByIndex(address owner, uint256 index)
-		public
-		view
-		returns (uint256)
-	{
+	// Selector: changeOwner(address) a6f9dae1
+	function changeOwner(address newOwner) public {
 		require(false, stub_error);
-		owner;
-		index;
-		dummy;
-		return 0;
-	}
-
-	// @notice Count RFTs tracked by this contract
-	// @return A count of valid RFTs tracked by this contract, where each one of
-	//  them has an assigned and queryable owner not equal to the zero address
-	//
-	// Selector: totalSupply() 18160ddd
-	function totalSupply() public view returns (uint256) {
-		require(false, stub_error);
-		dummy;
-		return 0;
-	}
-}
-
-// Selector: 7c3bef89
-contract ERC721UniqueExtensions is Dummy, ERC165 {
-	// @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.
-	//  Throws if RFT pieces have multiple owners.
-	// @param to The new owner
-	// @param tokenId The RFT to transfer
-	// @param _value Not used for an RFT
-	//
-	// Selector: transfer(address,uint256) a9059cbb
-	function transfer(address to, uint256 tokenId) public {
-		require(false, stub_error);
-		to;
-		tokenId;
-		dummy = 0;
-	}
-
-	// @notice Burns a specific ERC721 token.
-	// @dev Throws unless `msg.sender` is the current owner or an authorized
-	//  operator for this RFT. Throws if `from` is not the current owner. Throws
-	//  if `to` is the zero address. Throws if `tokenId` is not a valid RFT.
-	//  Throws if RFT pieces have multiple owners.
-	// @param from The current owner of the RFT
-	// @param tokenId The RFT to transfer
-	// @param _value Not used for an RFT
-	//
-	// Selector: burnFrom(address,uint256) 79cc6790
-	function burnFrom(address from, uint256 tokenId) public {
-		require(false, stub_error);
-		from;
-		tokenId;
-		dummy = 0;
-	}
-
-	// @notice Returns next free RFT ID.
-	//
-	// Selector: nextTokenId() 75794a3c
-	function nextTokenId() public view returns (uint256) {
-		require(false, stub_error);
-		dummy;
-		return 0;
-	}
-
-	// @notice Function to mint multiple tokens.
-	// @dev `tokenIds` should be an array of consecutive numbers and first number
-	//  should be obtained with `nextTokenId` method
-	// @param to The new owner
-	// @param tokenIds IDs of the minted RFTs
-	//
-	// Selector: mintBulk(address,uint256[]) 44a9945e
-	function mintBulk(address to, uint256[] memory tokenIds)
-		public
-		returns (bool)
-	{
-		require(false, stub_error);
-		to;
-		tokenIds;
-		dummy = 0;
-		return false;
-	}
-
-	// @notice Function to mint multiple tokens with the given tokenUris.
-	// @dev `tokenIds` is array of pairs of token ID and token URI. Token IDs should be consecutive
-	//  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
-	//
-	// Selector: mintBulkWithTokenURI(address,(uint256,string)[]) 36543006
-	function mintBulkWithTokenURI(address to, Tuple0[] memory tokens)
-		public
-		returns (bool)
-	{
-		require(false, stub_error);
-		to;
-		tokens;
+		newOwner;
 		dummy = 0;
-		return false;
-	}
-
-	// Returns EVM address for refungible token
-	//
-	// @param token ID of the token
-	//
-	// Selector: tokenContractAddress(uint256) ab76fac6
-	function tokenContractAddress(uint256 token) public view returns (address) {
-		require(false, stub_error);
-		token;
-		dummy;
-		return 0x0000000000000000000000000000000000000000;
 	}
 }
 
modifiedtests/src/eth/api/UniqueFungible.soldiffbeforeafterboth
--- a/tests/src/eth/api/UniqueFungible.sol
+++ b/tests/src/eth/api/UniqueFungible.sol
@@ -22,7 +22,50 @@
 	);
 }
 
-// Selector: 6cf113cd
+// Selector: 79cc6790
+interface ERC20UniqueExtensions is Dummy, ERC165 {
+	// Selector: burnFrom(address,uint256) 79cc6790
+	function burnFrom(address from, uint256 amount) external returns (bool);
+}
+
+// Selector: 942e8b22
+interface ERC20 is Dummy, ERC165, ERC20Events {
+	// Selector: name() 06fdde03
+	function name() external view returns (string memory);
+
+	// Selector: symbol() 95d89b41
+	function symbol() external view returns (string memory);
+
+	// Selector: totalSupply() 18160ddd
+	function totalSupply() external view returns (uint256);
+
+	// Selector: decimals() 313ce567
+	function decimals() external view returns (uint8);
+
+	// Selector: balanceOf(address) 70a08231
+	function balanceOf(address owner) external view returns (uint256);
+
+	// Selector: transfer(address,uint256) a9059cbb
+	function transfer(address to, uint256 amount) external returns (bool);
+
+	// Selector: transferFrom(address,address,uint256) 23b872dd
+	function transferFrom(
+		address from,
+		address to,
+		uint256 amount
+	) external returns (bool);
+
+	// Selector: approve(address,uint256) 095ea7b3
+	function approve(address spender, uint256 amount) external returns (bool);
+
+	// Selector: allowance(address,address) dd62ed3e
+	function allowance(address owner, address spender)
+		external
+		view
+		returns (uint256);
+}
+
+// Selector: ca08c92c
 interface Collection is Dummy, ERC165 {
 	// Set collection property.
 	//
@@ -183,49 +226,14 @@
 	//
 	// Selector: uniqueCollectionType() d34b55b8
 	function uniqueCollectionType() external returns (string memory);
-}
 
-// Selector: 79cc6790
-interface ERC20UniqueExtensions is Dummy, ERC165 {
-	// Selector: burnFrom(address,uint256) 79cc6790
-	function burnFrom(address from, uint256 amount) external returns (bool);
-}
-
-// Selector: 942e8b22
-interface ERC20 is Dummy, ERC165, ERC20Events {
-	// Selector: name() 06fdde03
-	function name() external view returns (string memory);
-
-	// Selector: symbol() 95d89b41
-	function symbol() external view returns (string memory);
-
-	// Selector: totalSupply() 18160ddd
-	function totalSupply() external view returns (uint256);
-
-	// Selector: decimals() 313ce567
-	function decimals() external view returns (uint8);
-
-	// Selector: balanceOf(address) 70a08231
-	function balanceOf(address owner) external view returns (uint256);
-
-	// Selector: transfer(address,uint256) a9059cbb
-	function transfer(address to, uint256 amount) external returns (bool);
-
-	// Selector: transferFrom(address,address,uint256) 23b872dd
-	function transferFrom(
-		address from,
-		address to,
-		uint256 amount
-	) external returns (bool);
-
-	// Selector: approve(address,uint256) 095ea7b3
-	function approve(address spender, uint256 amount) external returns (bool);
-
-	// Selector: allowance(address,address) dd62ed3e
-	function allowance(address owner, address spender)
-		external
-		view
-		returns (uint256);
+	// Changes collection owner
+	//
+	// @dev Owner can be changed only by current owner
+	// @param newOwner new owner
+	//
+	// Selector: changeOwner(address) a6f9dae1
+	function changeOwner(address newOwner) external;
 }
 
 interface UniqueFungible is
modifiedtests/src/eth/api/UniqueNFT.soldiffbeforeafterboth
--- a/tests/src/eth/api/UniqueNFT.sol
+++ b/tests/src/eth/api/UniqueNFT.sol
@@ -250,7 +250,33 @@
 	function finishMinting() external returns (bool);
 }
 
-// Selector: 6cf113cd
+// Selector: 780e9d63
+interface ERC721Enumerable is Dummy, ERC165 {
+	// @notice Enumerate valid NFTs
+	// @param index A counter less than `totalSupply()`
+	// @return The token identifier for the `index`th NFT,
+	//  (sort order not specified)
+	//
+	// Selector: tokenByIndex(uint256) 4f6ccce7
+	function tokenByIndex(uint256 index) external view returns (uint256);
+
+	// @dev Not implemented
+	//
+	// Selector: tokenOfOwnerByIndex(address,uint256) 2f745c59
+	function tokenOfOwnerByIndex(address owner, uint256 index)
+		external
+		view
+		returns (uint256);
+
+	// @notice Count NFTs tracked by this contract
+	// @return A count of valid NFTs tracked by this contract, where each one of
+	//  them has an assigned and queryable owner not equal to the zero address
+	//
+	// Selector: totalSupply() 18160ddd
+	function totalSupply() external view returns (uint256);
+}
+
+// Selector: ca08c92c
 interface Collection is Dummy, ERC165 {
 	// Set collection property.
 	//
@@ -411,32 +437,14 @@
 	//
 	// Selector: uniqueCollectionType() d34b55b8
 	function uniqueCollectionType() external returns (string memory);
-}
 
-// Selector: 780e9d63
-interface ERC721Enumerable is Dummy, ERC165 {
-	// @notice Enumerate valid NFTs
-	// @param index A counter less than `totalSupply()`
-	// @return The token identifier for the `index`th NFT,
-	//  (sort order not specified)
+	// Changes collection owner
 	//
-	// Selector: tokenByIndex(uint256) 4f6ccce7
-	function tokenByIndex(uint256 index) external view returns (uint256);
-
-	// @dev Not implemented
+	// @dev Owner can be changed only by current owner
+	// @param newOwner new owner
 	//
-	// Selector: tokenOfOwnerByIndex(address,uint256) 2f745c59
-	function tokenOfOwnerByIndex(address owner, uint256 index)
-		external
-		view
-		returns (uint256);
-
-	// @notice Count NFTs tracked by this contract
-	// @return A count of valid NFTs tracked by this contract, where each one of
-	//  them has an assigned and queryable owner not equal to the zero address
-	//
-	// Selector: totalSupply() 18160ddd
-	function totalSupply() external view returns (uint256);
+	// Selector: changeOwner(address) a6f9dae1
+	function changeOwner(address newOwner) external;
 }
 
 // Selector: d74d154f
modifiedtests/src/eth/api/UniqueRefungible.soldiffbeforeafterboth
--- a/tests/src/eth/api/UniqueRefungible.sol
+++ b/tests/src/eth/api/UniqueRefungible.sol
@@ -248,7 +248,96 @@
 	function finishMinting() external returns (bool);
 }
 
-// Selector: 6cf113cd
+// Selector: 780e9d63
+interface ERC721Enumerable is Dummy, ERC165 {
+	// @notice Enumerate valid RFTs
+	// @param index A counter less than `totalSupply()`
+	// @return The token identifier for the `index`th NFT,
+	//  (sort order not specified)
+	//
+	// Selector: tokenByIndex(uint256) 4f6ccce7
+	function tokenByIndex(uint256 index) external view returns (uint256);
+
+	// Not implemented
+	//
+	// Selector: tokenOfOwnerByIndex(address,uint256) 2f745c59
+	function tokenOfOwnerByIndex(address owner, uint256 index)
+		external
+		view
+		returns (uint256);
+
+	// @notice Count RFTs tracked by this contract
+	// @return A count of valid RFTs tracked by this contract, where each one of
+	//  them has an assigned and queryable owner not equal to the zero address
+	//
+	// Selector: totalSupply() 18160ddd
+	function totalSupply() external view returns (uint256);
+}
+
+// Selector: 7c3bef89
+interface ERC721UniqueExtensions is Dummy, ERC165 {
+	// @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.
+	//  Throws if RFT pieces have multiple owners.
+	// @param to The new owner
+	// @param tokenId The RFT to transfer
+	// @param _value Not used for an RFT
+	//
+	// Selector: transfer(address,uint256) a9059cbb
+	function transfer(address to, uint256 tokenId) external;
+
+	// @notice Burns a specific ERC721 token.
+	// @dev Throws unless `msg.sender` is the current owner or an authorized
+	//  operator for this RFT. Throws if `from` is not the current owner. Throws
+	//  if `to` is the zero address. Throws if `tokenId` is not a valid RFT.
+	//  Throws if RFT pieces have multiple owners.
+	// @param from The current owner of the RFT
+	// @param tokenId The RFT to transfer
+	// @param _value Not used for an RFT
+	//
+	// Selector: burnFrom(address,uint256) 79cc6790
+	function burnFrom(address from, uint256 tokenId) external;
+
+	// @notice Returns next free RFT ID.
+	//
+	// Selector: nextTokenId() 75794a3c
+	function nextTokenId() external view returns (uint256);
+
+	// @notice Function to mint multiple tokens.
+	// @dev `tokenIds` should be an array of consecutive numbers and first number
+	//  should be obtained with `nextTokenId` method
+	// @param to The new owner
+	// @param tokenIds IDs of the minted RFTs
+	//
+	// Selector: mintBulk(address,uint256[]) 44a9945e
+	function mintBulk(address to, uint256[] memory tokenIds)
+		external
+		returns (bool);
+
+	// @notice Function to mint multiple tokens with the given tokenUris.
+	// @dev `tokenIds` is array of pairs of token ID and token URI. Token IDs should be consecutive
+	//  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
+	//
+	// Selector: mintBulkWithTokenURI(address,(uint256,string)[]) 36543006
+	function mintBulkWithTokenURI(address to, Tuple0[] memory tokens)
+		external
+		returns (bool);
+
+	// Returns EVM address for refungible token
+	//
+	// @param token ID of the token
+	//
+	// Selector: tokenContractAddress(uint256) ab76fac6
+	function tokenContractAddress(uint256 token)
+		external
+		view
+		returns (address);
+}
+
+// Selector: ca08c92c
 interface Collection is Dummy, ERC165 {
 	// Set collection property.
 	//
@@ -409,95 +498,14 @@
 	//
 	// Selector: uniqueCollectionType() d34b55b8
 	function uniqueCollectionType() external returns (string memory);
-}
-
-// Selector: 780e9d63
-interface ERC721Enumerable is Dummy, ERC165 {
-	// @notice Enumerate valid RFTs
-	// @param index A counter less than `totalSupply()`
-	// @return The token identifier for the `index`th NFT,
-	//  (sort order not specified)
-	//
-	// Selector: tokenByIndex(uint256) 4f6ccce7
-	function tokenByIndex(uint256 index) external view returns (uint256);
-
-	// Not implemented
-	//
-	// Selector: tokenOfOwnerByIndex(address,uint256) 2f745c59
-	function tokenOfOwnerByIndex(address owner, uint256 index)
-		external
-		view
-		returns (uint256);
-
-	// @notice Count RFTs tracked by this contract
-	// @return A count of valid RFTs tracked by this contract, where each one of
-	//  them has an assigned and queryable owner not equal to the zero address
-	//
-	// Selector: totalSupply() 18160ddd
-	function totalSupply() external view returns (uint256);
-}
 
-// Selector: 7c3bef89
-interface ERC721UniqueExtensions is Dummy, ERC165 {
-	// @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.
-	//  Throws if RFT pieces have multiple owners.
-	// @param to The new owner
-	// @param tokenId The RFT to transfer
-	// @param _value Not used for an RFT
-	//
-	// Selector: transfer(address,uint256) a9059cbb
-	function transfer(address to, uint256 tokenId) external;
-
-	// @notice Burns a specific ERC721 token.
-	// @dev Throws unless `msg.sender` is the current owner or an authorized
-	//  operator for this RFT. Throws if `from` is not the current owner. Throws
-	//  if `to` is the zero address. Throws if `tokenId` is not a valid RFT.
-	//  Throws if RFT pieces have multiple owners.
-	// @param from The current owner of the RFT
-	// @param tokenId The RFT to transfer
-	// @param _value Not used for an RFT
-	//
-	// Selector: burnFrom(address,uint256) 79cc6790
-	function burnFrom(address from, uint256 tokenId) external;
-
-	// @notice Returns next free RFT ID.
-	//
-	// Selector: nextTokenId() 75794a3c
-	function nextTokenId() external view returns (uint256);
-
-	// @notice Function to mint multiple tokens.
-	// @dev `tokenIds` should be an array of consecutive numbers and first number
-	//  should be obtained with `nextTokenId` method
-	// @param to The new owner
-	// @param tokenIds IDs of the minted RFTs
-	//
-	// Selector: mintBulk(address,uint256[]) 44a9945e
-	function mintBulk(address to, uint256[] memory tokenIds)
-		external
-		returns (bool);
-
-	// @notice Function to mint multiple tokens with the given tokenUris.
-	// @dev `tokenIds` is array of pairs of token ID and token URI. Token IDs should be consecutive
-	//  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
+	// Changes collection owner
 	//
-	// Selector: mintBulkWithTokenURI(address,(uint256,string)[]) 36543006
-	function mintBulkWithTokenURI(address to, Tuple0[] memory tokens)
-		external
-		returns (bool);
-
-	// Returns EVM address for refungible token
-	//
-	// @param token ID of the token
+	// @dev Owner can be changed only by current owner
+	// @param newOwner new owner
 	//
-	// Selector: tokenContractAddress(uint256) ab76fac6
-	function tokenContractAddress(uint256 token)
-		external
-		view
-		returns (address);
+	// Selector: changeOwner(address) a6f9dae1
+	function changeOwner(address newOwner) external;
 }
 
 interface UniqueRefungible is
modifiedtests/src/eth/collectionAdmin.test.tsdiffbeforeafterboth
--- a/tests/src/eth/collectionAdmin.test.ts
+++ b/tests/src/eth/collectionAdmin.test.ts
@@ -15,6 +15,7 @@
 
 import {expect} from 'chai';
 import privateKey from '../substrate/privateKey';
+import { UNIQUE } from '../util/helpers';
 import {
   createEthAccount,
   createEthAccountWithBalance, 
@@ -22,6 +23,7 @@
   evmCollectionHelpers, 
   getCollectionAddressFromResult, 
   itWeb3,
+  recordEthFee,
 } from './util/helpers';
 
 describe('Add collection admins', () => {
@@ -309,4 +311,51 @@
     expect(adminList[0].asSubstrate.toString().toLocaleLowerCase())
       .to.be.eq(adminSub.address.toLocaleLowerCase());
   });
+});
+
+describe('Change owner tests', () => {
+  itWeb3('Change owner', async ({api, web3, privateKeyWrapper}) => {
+    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
+    const newOwner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
+    const collectionHelper = evmCollectionHelpers(web3, owner);
+    const result = await collectionHelper.methods
+      .createNonfungibleCollection('A', 'B', 'C')
+      .send();
+    const {collectionIdAddress} = await getCollectionAddressFromResult(api, result);
+    const collectionEvm = evmCollection(web3, owner, collectionIdAddress);
+  
+    await collectionEvm.methods.changeOwner(newOwner).send();
+  
+    expect(await collectionEvm.methods.verifyOwnerOrAdmin(owner).call()).to.be.false;
+    expect(await collectionEvm.methods.verifyOwnerOrAdmin(newOwner).call()).to.be.true;
+  });
+
+  itWeb3('change owner call fee', async ({web3, api, privateKeyWrapper}) => {
+    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
+    const newOwner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
+    const collectionHelper = evmCollectionHelpers(web3, owner);
+    const result = await collectionHelper.methods
+      .createNonfungibleCollection('A', 'B', 'C')
+      .send();
+    const {collectionIdAddress} = await getCollectionAddressFromResult(api, result);
+    const collectionEvm = evmCollection(web3, owner, collectionIdAddress);
+
+    const cost = await recordEthFee(api, owner, () => collectionEvm.methods.changeOwner(newOwner).send());
+    expect(cost < BigInt(0.2 * Number(UNIQUE)));
+    expect(cost > 0);
+  });
+
+  itWeb3('(!negative tests!) call changeOwner by not owner', async ({api, web3, privateKeyWrapper}) => {
+    const owner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
+    const newOwner = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
+    const collectionHelper = evmCollectionHelpers(web3, owner);
+    const result = await collectionHelper.methods
+      .createNonfungibleCollection('A', 'B', 'C')
+      .send();
+    const {collectionIdAddress} = await getCollectionAddressFromResult(api, result);
+    const collectionEvm = evmCollection(web3, owner, collectionIdAddress);
+  
+    await expect(collectionEvm.methods.changeOwner(newOwner).send({from: newOwner})).to.be.rejected;
+    expect(await collectionEvm.methods.verifyOwnerOrAdmin(newOwner).call()).to.be.false;
+  });
 });
\ No newline at end of file
modifiedtests/src/eth/fungibleAbi.jsondiffbeforeafterboth
--- a/tests/src/eth/fungibleAbi.json
+++ b/tests/src/eth/fungibleAbi.json
@@ -116,6 +116,15 @@
     "type": "function"
   },
   {
+    "inputs": [
+      { "internalType": "address", "name": "newOwner", "type": "address" }
+    ],
+    "name": "changeOwner",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
     "inputs": [{ "internalType": "string", "name": "key", "type": "string" }],
     "name": "collectionProperty",
     "outputs": [{ "internalType": "bytes", "name": "", "type": "bytes" }],
modifiedtests/src/eth/nonFungibleAbi.jsondiffbeforeafterboth
--- a/tests/src/eth/nonFungibleAbi.json
+++ b/tests/src/eth/nonFungibleAbi.json
@@ -146,6 +146,15 @@
     "type": "function"
   },
   {
+    "inputs": [
+      { "internalType": "address", "name": "newOwner", "type": "address" }
+    ],
+    "name": "changeOwner",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
     "inputs": [{ "internalType": "string", "name": "key", "type": "string" }],
     "name": "collectionProperty",
     "outputs": [{ "internalType": "bytes", "name": "", "type": "bytes" }],
modifiedtests/src/eth/reFungibleAbi.jsondiffbeforeafterboth
--- a/tests/src/eth/reFungibleAbi.json
+++ b/tests/src/eth/reFungibleAbi.json
@@ -146,6 +146,15 @@
     "type": "function"
   },
   {
+    "inputs": [
+      { "internalType": "address", "name": "newOwner", "type": "address" }
+    ],
+    "name": "changeOwner",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
     "inputs": [{ "internalType": "string", "name": "key", "type": "string" }],
     "name": "collectionProperty",
     "outputs": [{ "internalType": "bytes", "name": "", "type": "bytes" }],