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

--- a/pallets/common/src/erc.rs
+++ b/pallets/common/src/erc.rs
@@ -431,6 +431,27 @@
 		};
 		Ok(mode.into())
 	}
+
+	/// Changes collection owner
+	///
+	/// @dev Owner can be changed only by current owner
+	/// @param newOwner new owner
+	fn change_owner(&mut self, caller: caller, new_owner: address) -> Result<void> {
+		let caller = T::CrossAccountId::from_eth(caller);
+		let new_owner = T::CrossAccountId::from_eth(new_owner);
+		self.change_owner_internal(caller, new_owner)
+	}
+
+impl<T: Config> CollectionHandle<T>
+where
+	T::AccountId: From<[u8; 32]>,
+{
+
+	fn change_owner_internal(&mut self, caller: T::CrossAccountId, new_owner: T::CrossAccountId) -> Result<void> {
+		self.check_is_owner(&caller).map_err(dispatch_to_evm::<T>)?;
+		self.collection.owner = new_owner.as_sub().clone();
+		save(self)
+	}
 }
 
 fn check_is_owner_or_admin<T: Config>(
@@ -440,12 +461,13 @@
 	let caller = T::CrossAccountId::from_eth(caller);
 	collection
 		.check_is_owner_or_admin(&caller)
-		.map_err(pallet_evm_coder_substrate::dispatch_to_evm::<T>)?;
+		.map_err(dispatch_to_evm::<T>)?;
 	Ok(caller)
 }
 
 fn save<T: Config>(collection: &CollectionHandle<T>) -> Result<void> {
 	// TODO possibly delete for the lack of transaction
+	collection.consume_store_writes(1)?;
 	collection
 		.check_is_internal()
 		.map_err(dispatch_to_evm::<T>)?;

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--- 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;
 	}
 }
 

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--- 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;
 	}
 }
 

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371	}371	}
372}372}
373
374// Selector: 6cf113cd
375contract Collection is Dummy, ERC165 {
376	// Set collection property.
377	//
378	// @param key Property key.
379	// @param value Propery value.
380	//
381	// Selector: setCollectionProperty(string,bytes) 2f073f66
382	function setCollectionProperty(string memory key, bytes memory value)
383		public
384	{
385		require(false, stub_error);
386		key;
387		value;
388		dummy = 0;
389	}
390
391	// Delete collection property.
392	//
393	// @param key Property key.
394	//
395	// Selector: deleteCollectionProperty(string) 7b7debce
396	function deleteCollectionProperty(string memory key) public {
397		require(false, stub_error);
398		key;
399		dummy = 0;
400	}
401
402	// Get collection property.
403	//
404	// @dev Throws error if key not found.
405	//
406	// @param key Property key.
407	// @return bytes The property corresponding to the key.
408	//
409	// Selector: collectionProperty(string) cf24fd6d
410	function collectionProperty(string memory key)
411		public
412		view
413		returns (bytes memory)
414	{
415		require(false, stub_error);
416		key;
417		dummy;
418		return hex"";
419	}
420
421	// Set the sponsor of the collection.
422	//
423	// @dev In order for sponsorship to work, it must be confirmed on behalf of the sponsor.
424	//
425	// @param sponsor Address of the sponsor from whose account funds will be debited for operations with the contract.
426	//
427	// Selector: setCollectionSponsor(address) 7623402e
428	function setCollectionSponsor(address sponsor) public {
429		require(false, stub_error);
430		sponsor;
431		dummy = 0;
432	}
433
434	// Collection sponsorship confirmation.
435	//
436	// @dev After setting the sponsor for the collection, it must be confirmed with this function.
437	//
438	// Selector: confirmCollectionSponsorship() 3c50e97a
439	function confirmCollectionSponsorship() public {
440		require(false, stub_error);
441		dummy = 0;
442	}
443
444	// Set limits for the collection.
445	// @dev Throws error if limit not found.
446	// @param limit Name of the limit. Valid names:
447	// 	"accountTokenOwnershipLimit",
448	// 	"sponsoredDataSize",
449	// 	"sponsoredDataRateLimit",
450	// 	"tokenLimit",
451	// 	"sponsorTransferTimeout",
452	// 	"sponsorApproveTimeout"
453	// @param value Value of the limit.
454	//
455	// Selector: setCollectionLimit(string,uint32) 6a3841db
456	function setCollectionLimit(string memory limit, uint32 value) public {
457		require(false, stub_error);
458		limit;
459		value;
460		dummy = 0;
461	}
462
463	// Set limits for the collection.
464	// @dev Throws error if limit not found.
465	// @param limit Name of the limit. Valid names:
466	// 	"ownerCanTransfer",
467	// 	"ownerCanDestroy",
468	// 	"transfersEnabled"
469	// @param value Value of the limit.
470	//
471	// Selector: setCollectionLimit(string,bool) 993b7fba
472	function setCollectionLimit(string memory limit, bool value) public {
473		require(false, stub_error);
474		limit;
475		value;
476		dummy = 0;
477	}
478
479	// Get contract address.
480	//
481	// Selector: contractAddress() f6b4dfb4
482	function contractAddress() public view returns (address) {
483		require(false, stub_error);
484		dummy;
485		return 0x0000000000000000000000000000000000000000;
486	}
487
488	// Add collection admin by substrate address.
489	// @param new_admin Substrate administrator address.
490	//
491	// Selector: addCollectionAdminSubstrate(uint256) 5730062b
492	function addCollectionAdminSubstrate(uint256 newAdmin) public {
493		require(false, stub_error);
494		newAdmin;
495		dummy = 0;
496	}
497
498	// Remove collection admin by substrate address.
499	// @param admin Substrate administrator address.
500	//
501	// Selector: removeCollectionAdminSubstrate(uint256) 4048fcf9
502	function removeCollectionAdminSubstrate(uint256 admin) public {
503		require(false, stub_error);
504		admin;
505		dummy = 0;
506	}
507
508	// Add collection admin.
509	// @param new_admin Address of the added administrator.
510	//
511	// Selector: addCollectionAdmin(address) 92e462c7
512	function addCollectionAdmin(address newAdmin) public {
513		require(false, stub_error);
514		newAdmin;
515		dummy = 0;
516	}
517
518	// Remove collection admin.
519	//
520	// @param new_admin Address of the removed administrator.
521	//
522	// Selector: removeCollectionAdmin(address) fafd7b42
523	function removeCollectionAdmin(address admin) public {
524		require(false, stub_error);
525		admin;
526		dummy = 0;
527	}
528
529	// Toggle accessibility of collection nesting.
530	//
531	// @param enable If "true" degenerates to nesting: 'Owner' else to nesting: 'Disabled'
532	//
533	// Selector: setCollectionNesting(bool) 112d4586
534	function setCollectionNesting(bool enable) public {
535		require(false, stub_error);
536		enable;
537		dummy = 0;
538	}
539
540	// Toggle accessibility of collection nesting.
541	//
542	// @param enable If "true" degenerates to nesting: {OwnerRestricted: [1, 2, 3]} else to nesting: 'Disabled'
543	// @param collections Addresses of collections that will be available for nesting.
544	//
545	// Selector: setCollectionNesting(bool,address[]) 64872396
546	function setCollectionNesting(bool enable, address[] memory collections)
547		public
548	{
549		require(false, stub_error);
550		enable;
551		collections;
552		dummy = 0;
553	}
554
555	// Set the collection access method.
556	// @param mode Access mode
557	// 	0 for Normal
558	// 	1 for AllowList
559	//
560	// Selector: setCollectionAccess(uint8) 41835d4c
561	function setCollectionAccess(uint8 mode) public {
562		require(false, stub_error);
563		mode;
564		dummy = 0;
565	}
566
567	// Add the user to the allowed list.
568	//
569	// @param user Address of a trusted user.
570	//
571	// Selector: addToCollectionAllowList(address) 67844fe6
572	function addToCollectionAllowList(address user) public {
573		require(false, stub_error);
574		user;
575		dummy = 0;
576	}
577
578	// Remove the user from the allowed list.
579	//
580	// @param user Address of a removed user.
581	//
582	// Selector: removeFromCollectionAllowList(address) 85c51acb
583	function removeFromCollectionAllowList(address user) public {
584		require(false, stub_error);
585		user;
586		dummy = 0;
587	}
588
589	// Switch permission for minting.
590	//
591	// @param mode Enable if "true".
592	//
593	// Selector: setCollectionMintMode(bool) 00018e84
594	function setCollectionMintMode(bool mode) public {
595		require(false, stub_error);
596		mode;
597		dummy = 0;
598	}
599
600	// Check that account is the owner or admin of the collection
601	//
602	// @param user account to verify
603	// @return "true" if account is the owner or admin
604	//
605	// Selector: verifyOwnerOrAdmin(address) c2282493
606	function verifyOwnerOrAdmin(address user) public view returns (bool) {
607		require(false, stub_error);
608		user;
609		dummy;
610		return false;
611	}
612
613	// Returns collection type
614	//
615	// @return `Fungible` or `NFT` or `ReFungible`
616	//
617	// Selector: uniqueCollectionType() d34b55b8
618	function uniqueCollectionType() public returns (string memory) {
619		require(false, stub_error);
620		dummy = 0;
621		return "";
622	}
623}
624373
625// Selector: 780e9d63374// Selector: 780e9d63
626contract ERC721Enumerable is Dummy, ERC165 {375contract ERC721Enumerable is Dummy, ERC165 {
757	}506	}
758}507}
508
509// Selector: ca08c92c
510contract Collection is Dummy, ERC165 {
511	// Set collection property.
512	//
513	// @param key Property key.
514	// @param value Propery value.
515	//
516	// Selector: setCollectionProperty(string,bytes) 2f073f66
517	function setCollectionProperty(string memory key, bytes memory value)
518		public
519	{
520		require(false, stub_error);
521		key;
522		value;
523		dummy = 0;
524	}
525
526	// Delete collection property.
527	//
528	// @param key Property key.
529	//
530	// Selector: deleteCollectionProperty(string) 7b7debce
531	function deleteCollectionProperty(string memory key) public {
532		require(false, stub_error);
533		key;
534		dummy = 0;
535	}
536
537	// Get collection property.
538	//
539	// @dev Throws error if key not found.
540	//
541	// @param key Property key.
542	// @return bytes The property corresponding to the key.
543	//
544	// Selector: collectionProperty(string) cf24fd6d
545	function collectionProperty(string memory key)
546		public
547		view
548		returns (bytes memory)
549	{
550		require(false, stub_error);
551		key;
552		dummy;
553		return hex"";
554	}
555
556	// Set the sponsor of the collection.
557	//
558	// @dev In order for sponsorship to work, it must be confirmed on behalf of the sponsor.
559	//
560	// @param sponsor Address of the sponsor from whose account funds will be debited for operations with the contract.
561	//
562	// Selector: setCollectionSponsor(address) 7623402e
563	function setCollectionSponsor(address sponsor) public {
564		require(false, stub_error);
565		sponsor;
566		dummy = 0;
567	}
568
569	// Collection sponsorship confirmation.
570	//
571	// @dev After setting the sponsor for the collection, it must be confirmed with this function.
572	//
573	// Selector: confirmCollectionSponsorship() 3c50e97a
574	function confirmCollectionSponsorship() public {
575		require(false, stub_error);
576		dummy = 0;
577	}
578
579	// Set limits for the collection.
580	// @dev Throws error if limit not found.
581	// @param limit Name of the limit. Valid names:
582	// 	"accountTokenOwnershipLimit",
583	// 	"sponsoredDataSize",
584	// 	"sponsoredDataRateLimit",
585	// 	"tokenLimit",
586	// 	"sponsorTransferTimeout",
587	// 	"sponsorApproveTimeout"
588	// @param value Value of the limit.
589	//
590	// Selector: setCollectionLimit(string,uint32) 6a3841db
591	function setCollectionLimit(string memory limit, uint32 value) public {
592		require(false, stub_error);
593		limit;
594		value;
595		dummy = 0;
596	}
597
598	// Set limits for the collection.
599	// @dev Throws error if limit not found.
600	// @param limit Name of the limit. Valid names:
601	// 	"ownerCanTransfer",
602	// 	"ownerCanDestroy",
603	// 	"transfersEnabled"
604	// @param value Value of the limit.
605	//
606	// Selector: setCollectionLimit(string,bool) 993b7fba
607	function setCollectionLimit(string memory limit, bool value) public {
608		require(false, stub_error);
609		limit;
610		value;
611		dummy = 0;
612	}
613
614	// Get contract address.
615	//
616	// Selector: contractAddress() f6b4dfb4
617	function contractAddress() public view returns (address) {
618		require(false, stub_error);
619		dummy;
620		return 0x0000000000000000000000000000000000000000;
621	}
622
623	// Add collection admin by substrate address.
624	// @param new_admin Substrate administrator address.
625	//
626	// Selector: addCollectionAdminSubstrate(uint256) 5730062b
627	function addCollectionAdminSubstrate(uint256 newAdmin) public {
628		require(false, stub_error);
629		newAdmin;
630		dummy = 0;
631	}
632
633	// Remove collection admin by substrate address.
634	// @param admin Substrate administrator address.
635	//
636	// Selector: removeCollectionAdminSubstrate(uint256) 4048fcf9
637	function removeCollectionAdminSubstrate(uint256 admin) public {
638		require(false, stub_error);
639		admin;
640		dummy = 0;
641	}
642
643	// Add collection admin.
644	// @param new_admin Address of the added administrator.
645	//
646	// Selector: addCollectionAdmin(address) 92e462c7
647	function addCollectionAdmin(address newAdmin) public {
648		require(false, stub_error);
649		newAdmin;
650		dummy = 0;
651	}
652
653	// Remove collection admin.
654	//
655	// @param new_admin Address of the removed administrator.
656	//
657	// Selector: removeCollectionAdmin(address) fafd7b42
658	function removeCollectionAdmin(address admin) public {
659		require(false, stub_error);
660		admin;
661		dummy = 0;
662	}
663
664	// Toggle accessibility of collection nesting.
665	//
666	// @param enable If "true" degenerates to nesting: 'Owner' else to nesting: 'Disabled'
667	//
668	// Selector: setCollectionNesting(bool) 112d4586
669	function setCollectionNesting(bool enable) public {
670		require(false, stub_error);
671		enable;
672		dummy = 0;
673	}
674
675	// Toggle accessibility of collection nesting.
676	//
677	// @param enable If "true" degenerates to nesting: {OwnerRestricted: [1, 2, 3]} else to nesting: 'Disabled'
678	// @param collections Addresses of collections that will be available for nesting.
679	//
680	// Selector: setCollectionNesting(bool,address[]) 64872396
681	function setCollectionNesting(bool enable, address[] memory collections)
682		public
683	{
684		require(false, stub_error);
685		enable;
686		collections;
687		dummy = 0;
688	}
689
690	// Set the collection access method.
691	// @param mode Access mode
692	// 	0 for Normal
693	// 	1 for AllowList
694	//
695	// Selector: setCollectionAccess(uint8) 41835d4c
696	function setCollectionAccess(uint8 mode) public {
697		require(false, stub_error);
698		mode;
699		dummy = 0;
700	}
701
702	// Add the user to the allowed list.
703	//
704	// @param user Address of a trusted user.
705	//
706	// Selector: addToCollectionAllowList(address) 67844fe6
707	function addToCollectionAllowList(address user) public {
708		require(false, stub_error);
709		user;
710		dummy = 0;
711	}
712
713	// Remove the user from the allowed list.
714	//
715	// @param user Address of a removed user.
716	//
717	// Selector: removeFromCollectionAllowList(address) 85c51acb
718	function removeFromCollectionAllowList(address user) public {
719		require(false, stub_error);
720		user;
721		dummy = 0;
722	}
723
724	// Switch permission for minting.
725	//
726	// @param mode Enable if "true".
727	//
728	// Selector: setCollectionMintMode(bool) 00018e84
729	function setCollectionMintMode(bool mode) public {
730		require(false, stub_error);
731		mode;
732		dummy = 0;
733	}
734
735	// Check that account is the owner or admin of the collection
736	//
737	// @param user account to verify
738	// @return "true" if account is the owner or admin
739	//
740	// Selector: verifyOwnerOrAdmin(address) c2282493
741	function verifyOwnerOrAdmin(address user) public view returns (bool) {
742		require(false, stub_error);
743		user;
744		dummy;
745		return false;
746	}
747
748	// Returns collection type
749	//
750	// @return `Fungible` or `NFT` or `ReFungible`
751	//
752	// Selector: uniqueCollectionType() d34b55b8
753	function uniqueCollectionType() public returns (string memory) {
754		require(false, stub_error);
755		dummy = 0;
756		return "";
757	}
758
759	// Changes collection owner
760	//
761	// @dev Owner can be changed only by current owner
762	// @param newOwner new owner
763	//
764	// Selector: changeOwner(address) a6f9dae1
765	function changeOwner(address newOwner) public {
766		require(false, stub_error);
767		newOwner;
768		dummy = 0;
769	}
770}
759771
760contract UniqueRefungible is772contract UniqueRefungible is
761	Dummy,773	Dummy,

--- 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

--- 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

--- 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

--- 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

--- 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" }],

--- 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" }],

--- 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" }],