git.delta.rocks / unique-network / refs/commits / abc6b050b3ad

--- a/Makefile
+++ b/Makefile
@@ -41,10 +41,6 @@
 UniqueRefungible.sol:
 	PACKAGE=pallet-refungible NAME=erc::gen_iface OUTPUT=$(TESTS_API)/$@ ./.maintain/scripts/generate_sol.sh
 	PACKAGE=pallet-refungible NAME=erc::gen_impl OUTPUT=$(REFUNGIBLE_EVM_STUBS)/$@ ./.maintain/scripts/generate_sol.sh
-	
-UniqueRefungible.sol:
-	PACKAGE=pallet-refungible NAME=erc::gen_iface OUTPUT=$(TESTS_API)/$@ ./.maintain/scripts/generate_sol.sh
-	PACKAGE=pallet-refungible NAME=erc::gen_impl OUTPUT=$(REFUNGIBLE_EVM_STUBS)/$@ ./.maintain/scripts/generate_sol.sh
 
 UniqueRefungibleToken.sol:
 	PACKAGE=pallet-refungible NAME=erc_token::gen_iface OUTPUT=$(TESTS_API)/$@ ./.maintain/scripts/generate_sol.sh
@@ -73,10 +69,6 @@
 UniqueRefungibleToken: UniqueRefungibleToken.sol
 	INPUT=$(REFUNGIBLE_EVM_STUBS)/$< OUTPUT=$(REFUNGIBLE_EVM_STUBS)/UniqueRefungibleToken.raw ./.maintain/scripts/compile_stub.sh
 	INPUT=$(REFUNGIBLE_EVM_STUBS)/$< OUTPUT=$(REFUNGIBLE_TOKEN_EVM_ABI) ./.maintain/scripts/generate_abi.sh
-
-UniqueRefungible: UniqueRefungible.sol
-	INPUT=$(REFUNGIBLE_EVM_STUBS)/$< OUTPUT=$(REFUNGIBLE_EVM_STUBS)/UniqueRefungible.raw ./.maintain/scripts/compile_stub.sh
-	INPUT=$(REFUNGIBLE_EVM_STUBS)/$< OUTPUT=$(REFUNGIBLE_EVM_ABI) ./.maintain/scripts/generate_abi.sh
 
 ContractHelpers: ContractHelpers.sol
 	INPUT=$(CONTRACT_HELPERS_STUBS)/$< OUTPUT=$(CONTRACT_HELPERS_STUBS)/ContractHelpers.raw ./.maintain/scripts/compile_stub.sh

--- a/pallets/refungible/src/erc.rs
+++ b/pallets/refungible/src/erc.rs
@@ -34,8 +34,9 @@
 		CommonEvmHandler, CollectionCall,
 		static_property::{key, value as property_value},
 	},
+	eth::collection_id_to_address,
 };
-use pallet_evm::{account::CrossAccountId, PrecompileHandle};
+use pallet_evm::{account::CrossAccountId, Pallet as PalletEvm, PrecompileHandle};
 use pallet_evm_coder_substrate::{call, dispatch_to_evm};
 use pallet_structure::{SelfWeightOf as StructureWeight, weights::WeightInfo as _};
 use sp_core::H160;
@@ -46,8 +47,8 @@
 };
 
 use crate::{
-	AccountBalance, Config, CreateItemData, Pallet, RefungibleHandle, SelfWeightOf,
-	TokenProperties, TokensMinted, weights::WeightInfo,
+	AccountBalance, Balance, Config, CreateItemData, Pallet, RefungibleHandle, SelfWeightOf,
+	TokenProperties, TokensMinted, TotalSupply, weights::WeightInfo,
 };
 
 /// @title A contract that allows to set and delete token properties and change token property permissions.
@@ -331,16 +332,49 @@
 		Err("not implemented".into())
 	}
 
-	/// @dev Not implemented
+	/// @notice Transfer ownership of an RFT -- THE CALLER IS RESPONSIBLE
+	///  TO CONFIRM THAT `to` IS CAPABLE OF RECEIVING NFTS OR ELSE
+	///  THEY MAY BE PERMANENTLY LOST
+	/// @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 NFT
+	/// @param to The new owner
+	/// @param tokenId The NFT to transfer
+	/// @param _value Not used for an NFT
+	#[weight(<SelfWeightOf<T>>::transfer_from_creating_removing())]
 	fn transfer_from(
 		&mut self,
-		_caller: caller,
-		_from: address,
-		_to: address,
-		_token_id: uint256,
+		caller: caller,
+		from: address,
+		to: address,
+		token_id: uint256,
 		_value: value,
 	) -> Result<void> {
-		Err("not implemented".into())
+		let caller = T::CrossAccountId::from_eth(caller);
+		let from = T::CrossAccountId::from_eth(from);
+		let to = T::CrossAccountId::from_eth(to);
+		let token = token_id.try_into()?;
+		let budget = self
+			.recorder
+			.weight_calls_budget(<StructureWeight<T>>::find_parent());
+
+		let balance = balance(&self, token, &from)?;
+		ensure_single_owner(&self, token, balance)?;
+
+		<Pallet<T>>::transfer_from(self, &caller, &from, &to, token, balance, &budget)
+			.map_err(dispatch_to_evm::<T>)?;
+
+		<PalletEvm<T>>::deposit_log(
+			ERC721Events::Transfer {
+				from: *from.as_eth(),
+				to: *to.as_eth(),
+				token_id: token_id.into(),
+			}
+			.to_log(collection_id_to_address(self.id)),
+		);
+		Ok(())
 	}
 
 	/// @dev Not implemented
@@ -378,12 +412,48 @@
 	}
 }
 
+/// Returns amount of pieces of `token` that `owner` have
+fn balance<T: Config>(
+	collection: &RefungibleHandle<T>,
+	token: TokenId,
+	owner: &T::CrossAccountId,
+) -> Result<u128> {
+	collection.consume_store_reads(1)?;
+	let balance = <Balance<T>>::get((collection.id, token, &owner));
+	Ok(balance)
+}
+
+/// Throws if `owner_balance` is lower than total amount of `token` pieces
+fn ensure_single_owner<T: Config>(
+	collection: &RefungibleHandle<T>,
+	token: TokenId,
+	owner_balance: u128,
+) -> Result<()> {
+	collection.consume_store_reads(1)?;
+	let total_supply = <TotalSupply<T>>::get((collection.id, token));
+	if total_supply != owner_balance {
+		return Err("token has multiple owners".into());
+	}
+	Ok(())
+}
+
 /// @title ERC721 Token that can be irreversibly burned (destroyed).
 #[solidity_interface(name = "ERC721Burnable")]
 impl<T: Config> RefungibleHandle<T> {
-	/// @dev Not implemented
-	fn burn(&mut self, _caller: caller, _token_id: uint256, _value: value) -> Result<void> {
-		Err("not implemented".into())
+	/// @notice Burns a specific ERC721 token.
+	/// @dev Throws unless `msg.sender` is the current RFT owner, or an authorized
+	///  operator of the current owner.
+	/// @param tokenId The RFT to approve
+	#[weight(<SelfWeightOf<T>>::burn_item_fully())]
+	fn burn(&mut self, caller: caller, token_id: uint256) -> Result<void> {
+		let caller = T::CrossAccountId::from_eth(caller);
+		let token = token_id.try_into()?;
+
+		let balance = balance(&self, token, &caller)?;
+		ensure_single_owner(&self, token, balance)?;
+
+		<Pallet<T>>::burn(self, &caller, token, balance).map_err(dispatch_to_evm::<T>)?;
+		Ok(())
 	}
 }
 
@@ -555,6 +625,75 @@
 /// @title Unique extensions for ERC721.
 #[solidity_interface(name = "ERC721UniqueExtensions")]
 impl<T: Config> RefungibleHandle<T> {
+	/// @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
+	#[weight(<SelfWeightOf<T>>::transfer_creating_removing())]
+	fn transfer(
+		&mut self,
+		caller: caller,
+		to: address,
+		token_id: uint256,
+		_value: value,
+	) -> Result<void> {
+		let caller = T::CrossAccountId::from_eth(caller);
+		let to = T::CrossAccountId::from_eth(to);
+		let token = token_id.try_into()?;
+		let budget = self
+			.recorder
+			.weight_calls_budget(<StructureWeight<T>>::find_parent());
+
+		let balance = balance(&self, token, &caller)?;
+		ensure_single_owner(&self, token, balance)?;
+
+		<Pallet<T>>::transfer(self, &caller, &to, token, balance, &budget)
+			.map_err(dispatch_to_evm::<T>)?;
+		<PalletEvm<T>>::deposit_log(
+			ERC721Events::Transfer {
+				from: *caller.as_eth(),
+				to: *to.as_eth(),
+				token_id: token_id.into(),
+			}
+			.to_log(collection_id_to_address(self.id)),
+		);
+		Ok(())
+	}
+
+	/// @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
+	#[weight(<SelfWeightOf<T>>::burn_from())]
+	fn burn_from(
+		&mut self,
+		caller: caller,
+		from: address,
+		token_id: uint256,
+		_value: value,
+	) -> Result<void> {
+		let caller = T::CrossAccountId::from_eth(caller);
+		let from = T::CrossAccountId::from_eth(from);
+		let token = token_id.try_into()?;
+		let budget = self
+			.recorder
+			.weight_calls_budget(<StructureWeight<T>>::find_parent());
+
+		let balance = balance(&self, token, &caller)?;
+		ensure_single_owner(&self, token, balance)?;
+
+		<Pallet<T>>::burn_from(self, &caller, &from, token, balance, &budget)
+			.map_err(dispatch_to_evm::<T>)?;
+		Ok(())
+	}
+
 	/// @notice Returns next free RFT ID.
 	fn next_token_id(&self) -> Result<uint256> {
 		self.consume_store_reads(1)?;

--- a/pallets/refungible/src/lib.rs
+++ b/pallets/refungible/src/lib.rs
@@ -454,6 +454,14 @@
 			<PalletStructure<T>>::unnest_if_nested(owner, collection.id, token);
 			<AccountBalance<T>>::insert((collection.id, owner), account_balance);
 			Self::burn_token_unchecked(collection, token)?;
+			<PalletEvm<T>>::deposit_log(
+				ERC721Events::Transfer {
+					from: *owner.as_eth(),
+					to: H160::default(),
+					token_id: token.into(),
+				}
+				.to_log(collection_id_to_address(collection.id)),
+			);
 			<PalletCommon<T>>::deposit_event(CommonEvent::ItemDestroyed(
 				collection.id,
 				token,

binary blob — no preview

--- a/pallets/refungible/src/stubs/UniqueRefungible.sol
+++ b/pallets/refungible/src/stubs/UniqueRefungible.sol
@@ -51,44 +51,15 @@
 	event MintingFinished();
 }
 
-// Selector: 0784ee64
-contract ERC721UniqueExtensions is Dummy, ERC165 {
-	// @notice Returns next free RFT ID.
-	//
-	// Selector: nextTokenId() 75794a3c
-	function nextTokenId() public view returns (uint256) {
-		require(false, stub_error);
-		dummy;
-		return 0;
-	}
-
-	// 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;
-	}
-
-	// 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;
-	}
-}
-
 // Selector: 41369377
 contract TokenProperties is Dummy, ERC165 {
+	// @notice Set permissions for token property.
+	// @dev Throws error if `msg.sender` is not admin or owner of the collection.
+	// @param key Property key.
+	// @param is_mutable Permission to mutate property.
+	// @param collection_admin Permission to mutate property by collection admin if property is mutable.
+	// @param token_owner Permission to mutate property by token owner if property is mutable.
+	//
 	// Selector: setTokenPropertyPermission(string,bool,bool,bool) 222d97fa
 	function setTokenPropertyPermission(
 		string memory key,
@@ -104,6 +75,12 @@
 		dummy = 0;
 	}
 
+	// @notice Set token property value.
+	// @dev Throws error if `msg.sender` has no permission to edit the property.
+	// @param tokenId ID of the token.
+	// @param key Property key.
+	// @param value Property value.
+	//
 	// Selector: setProperty(uint256,string,bytes) 1752d67b
 	function setProperty(
 		uint256 tokenId,
@@ -117,6 +94,11 @@
 		dummy = 0;
 	}
 
+	// @notice Delete token property value.
+	// @dev Throws error if `msg.sender` has no permission to edit the property.
+	// @param tokenId ID of the token.
+	// @param key Property key.
+	//
 	// Selector: deleteProperty(uint256,string) 066111d1
 	function deleteProperty(uint256 tokenId, string memory key) public {
 		require(false, stub_error);
@@ -125,7 +107,11 @@
 		dummy = 0;
 	}
 
-	// Throws error if key not found
+	// @notice Get token property value.
+	// @dev Throws error if key not found
+	// @param tokenId ID of the token.
+	// @param key Property key.
+	// @return Property value bytes
 	//
 	// Selector: property(uint256,string) 7228c327
 	function property(uint256 tokenId, string memory key)
@@ -143,7 +129,10 @@
 
 // Selector: 42966c68
 contract ERC721Burnable is Dummy, ERC165 {
-	// @dev Not implemented
+	// @notice Burns a specific ERC721 token.
+	// @dev Throws unless `msg.sender` is the current RFT owner, or an authorized
+	//  operator of the current owner.
+	// @param tokenId The RFT to approve
 	//
 	// Selector: burn(uint256) 42966c68
 	function burn(uint256 tokenId) public {
@@ -155,6 +144,12 @@
 
 // Selector: 58800161
 contract ERC721 is Dummy, ERC165, ERC721Events {
+	// @notice Count all RFTs assigned to an owner
+	// @dev RFTs assigned to the zero address are considered invalid, and this
+	//  function throws for queries about the zero address.
+	// @param owner An address for whom to query the balance
+	// @return The number of RFTs owned by `owner`, possibly zero
+	//
 	// Selector: balanceOf(address) 70a08231
 	function balanceOf(address owner) public view returns (uint256) {
 		require(false, stub_error);
@@ -203,7 +198,17 @@
 		dummy = 0;
 	}
 
-	// @dev Not implemented
+	// @notice Transfer ownership of an RFT -- THE CALLER IS RESPONSIBLE
+	//  TO CONFIRM THAT `to` IS CAPABLE OF RECEIVING NFTS OR ELSE
+	//  THEY MAY BE PERMANENTLY LOST
+	// @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 NFT
+	// @param to The new owner
+	// @param tokenId The NFT to transfer
+	// @param _value Not used for an NFT
 	//
 	// Selector: transferFrom(address,address,uint256) 23b872dd
 	function transferFrom(
@@ -266,6 +271,8 @@
 
 // Selector: 5b5e139f
 contract ERC721Metadata is Dummy, ERC165 {
+	// @notice A descriptive name for a collection of RFTs in this contract
+	//
 	// Selector: name() 06fdde03
 	function name() public view returns (string memory) {
 		require(false, stub_error);
@@ -273,6 +280,8 @@
 		return "";
 	}
 
+	// @notice An abbreviated name for RFTs in this contract
+	//
 	// Selector: symbol() 95d89b41
 	function symbol() public view returns (string memory) {
 		require(false, stub_error);
@@ -280,7 +289,15 @@
 		return "";
 	}
 
-	// Returns token's const_metadata
+	// @notice A distinct Uniform Resource Identifier (URI) for a given asset.
+	//
+	// @dev If the token has a `url` property and it is not empty, it is returned.
+	//  Else If the collection does not have a property with key `schemaName` or its value is not equal to `ERC721Metadata`, it return an error `tokenURI not set`.
+	//  If the collection property `baseURI` is empty or absent, return "" (empty string)
+	//  otherwise, if token property `suffix` present and is non-empty, return concatenation of baseURI and suffix
+	//  otherwise, return concatenation of `baseURI` and stringified token id (decimal stringifying, without paddings).
+	//
+	// @return token's const_metadata
 	//
 	// Selector: tokenURI(uint256) c87b56dd
 	function tokenURI(uint256 tokenId) public view returns (string memory) {
@@ -300,8 +317,11 @@
 		return false;
 	}
 
-	// `token_id` should be obtained with `next_token_id` method,
-	// unlike standard, you can't specify it manually
+	// @notice Function to mint token.
+	// @dev `tokenId` should be obtained with `nextTokenId` method,
+	//  unlike standard, you can't specify it manually
+	// @param to The new owner
+	// @param tokenId ID of the minted RFT
 	//
 	// Selector: mint(address,uint256) 40c10f19
 	function mint(address to, uint256 tokenId) public returns (bool) {
@@ -312,8 +332,12 @@
 		return false;
 	}
 
-	// `token_id` should be obtained with `next_token_id` method,
-	// unlike standard, you can't specify it manually
+	// @notice Function to mint token with the given tokenUri.
+	// @dev `tokenId` should be obtained with `nextTokenId` method,
+	//  unlike standard, you can't specify it manually
+	// @param to The new owner
+	// @param tokenId ID of the minted RFT
+	// @param tokenUri Token URI that would be stored in the RFT properties
 	//
 	// Selector: mintWithTokenURI(address,uint256,string) 50bb4e7f
 	function mintWithTokenURI(
@@ -341,6 +365,11 @@
 
 // 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);
@@ -364,6 +393,10 @@
 		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);
@@ -599,6 +632,87 @@
 	}
 }
 
+// Selector: d74d154f
+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;
+	}
+}
+
 contract UniqueRefungible is
 	Dummy,
 	ERC165,

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--- a/tests/src/eth/api/UniqueRefungible.sol
+++ b/tests/src/eth/api/UniqueRefungible.sol
@@ -42,26 +42,15 @@
 	event MintingFinished();
 }
 
-// Selector: 0784ee64
-interface ERC721UniqueExtensions is Dummy, ERC165 {
-	// @notice Returns next free RFT ID.
-	//
-	// Selector: nextTokenId() 75794a3c
-	function nextTokenId() external view returns (uint256);
-
-	// Selector: mintBulk(address,uint256[]) 44a9945e
-	function mintBulk(address to, uint256[] memory tokenIds)
-		external
-		returns (bool);
-
-	// Selector: mintBulkWithTokenURI(address,(uint256,string)[]) 36543006
-	function mintBulkWithTokenURI(address to, Tuple0[] memory tokens)
-		external
-		returns (bool);
-}
-
 // Selector: 41369377
 interface TokenProperties is Dummy, ERC165 {
+	// @notice Set permissions for token property.
+	// @dev Throws error if `msg.sender` is not admin or owner of the collection.
+	// @param key Property key.
+	// @param is_mutable Permission to mutate property.
+	// @param collection_admin Permission to mutate property by collection admin if property is mutable.
+	// @param token_owner Permission to mutate property by token owner if property is mutable.
+	//
 	// Selector: setTokenPropertyPermission(string,bool,bool,bool) 222d97fa
 	function setTokenPropertyPermission(
 		string memory key,
@@ -70,6 +59,12 @@
 		bool tokenOwner
 	) external;
 
+	// @notice Set token property value.
+	// @dev Throws error if `msg.sender` has no permission to edit the property.
+	// @param tokenId ID of the token.
+	// @param key Property key.
+	// @param value Property value.
+	//
 	// Selector: setProperty(uint256,string,bytes) 1752d67b
 	function setProperty(
 		uint256 tokenId,
@@ -77,10 +72,19 @@
 		bytes memory value
 	) external;
 
+	// @notice Delete token property value.
+	// @dev Throws error if `msg.sender` has no permission to edit the property.
+	// @param tokenId ID of the token.
+	// @param key Property key.
+	//
 	// Selector: deleteProperty(uint256,string) 066111d1
 	function deleteProperty(uint256 tokenId, string memory key) external;
 
-	// Throws error if key not found
+	// @notice Get token property value.
+	// @dev Throws error if key not found
+	// @param tokenId ID of the token.
+	// @param key Property key.
+	// @return Property value bytes
 	//
 	// Selector: property(uint256,string) 7228c327
 	function property(uint256 tokenId, string memory key)
@@ -91,7 +95,10 @@
 
 // Selector: 42966c68
 interface ERC721Burnable is Dummy, ERC165 {
-	// @dev Not implemented
+	// @notice Burns a specific ERC721 token.
+	// @dev Throws unless `msg.sender` is the current RFT owner, or an authorized
+	//  operator of the current owner.
+	// @param tokenId The RFT to approve
 	//
 	// Selector: burn(uint256) 42966c68
 	function burn(uint256 tokenId) external;
@@ -99,6 +106,12 @@
 
 // Selector: 58800161
 interface ERC721 is Dummy, ERC165, ERC721Events {
+	// @notice Count all RFTs assigned to an owner
+	// @dev RFTs assigned to the zero address are considered invalid, and this
+	//  function throws for queries about the zero address.
+	// @param owner An address for whom to query the balance
+	// @return The number of RFTs owned by `owner`, possibly zero
+	//
 	// Selector: balanceOf(address) 70a08231
 	function balanceOf(address owner) external view returns (uint256);
 
@@ -124,7 +137,17 @@
 		uint256 tokenId
 	) external;
 
-	// @dev Not implemented
+	// @notice Transfer ownership of an RFT -- THE CALLER IS RESPONSIBLE
+	//  TO CONFIRM THAT `to` IS CAPABLE OF RECEIVING NFTS OR ELSE
+	//  THEY MAY BE PERMANENTLY LOST
+	// @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 NFT
+	// @param to The new owner
+	// @param tokenId The NFT to transfer
+	// @param _value Not used for an NFT
 	//
 	// Selector: transferFrom(address,address,uint256) 23b872dd
 	function transferFrom(
@@ -159,13 +182,25 @@
 
 // Selector: 5b5e139f
 interface ERC721Metadata is Dummy, ERC165 {
+	// @notice A descriptive name for a collection of RFTs in this contract
+	//
 	// Selector: name() 06fdde03
 	function name() external view returns (string memory);
 
+	// @notice An abbreviated name for RFTs in this contract
+	//
 	// Selector: symbol() 95d89b41
 	function symbol() external view returns (string memory);
 
-	// Returns token's const_metadata
+	// @notice A distinct Uniform Resource Identifier (URI) for a given asset.
+	//
+	// @dev If the token has a `url` property and it is not empty, it is returned.
+	//  Else If the collection does not have a property with key `schemaName` or its value is not equal to `ERC721Metadata`, it return an error `tokenURI not set`.
+	//  If the collection property `baseURI` is empty or absent, return "" (empty string)
+	//  otherwise, if token property `suffix` present and is non-empty, return concatenation of baseURI and suffix
+	//  otherwise, return concatenation of `baseURI` and stringified token id (decimal stringifying, without paddings).
+	//
+	// @return token's const_metadata
 	//
 	// Selector: tokenURI(uint256) c87b56dd
 	function tokenURI(uint256 tokenId) external view returns (string memory);
@@ -176,14 +211,21 @@
 	// Selector: mintingFinished() 05d2035b
 	function mintingFinished() external view returns (bool);
 
-	// `token_id` should be obtained with `next_token_id` method,
-	// unlike standard, you can't specify it manually
+	// @notice Function to mint token.
+	// @dev `tokenId` should be obtained with `nextTokenId` method,
+	//  unlike standard, you can't specify it manually
+	// @param to The new owner
+	// @param tokenId ID of the minted RFT
 	//
 	// Selector: mint(address,uint256) 40c10f19
 	function mint(address to, uint256 tokenId) external returns (bool);
 
-	// `token_id` should be obtained with `next_token_id` method,
-	// unlike standard, you can't specify it manually
+	// @notice Function to mint token with the given tokenUri.
+	// @dev `tokenId` should be obtained with `nextTokenId` method,
+	//  unlike standard, you can't specify it manually
+	// @param to The new owner
+	// @param tokenId ID of the minted RFT
+	// @param tokenUri Token URI that would be stored in the RFT properties
 	//
 	// Selector: mintWithTokenURI(address,uint256,string) 50bb4e7f
 	function mintWithTokenURI(
@@ -200,6 +242,11 @@
 
 // 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);
 
@@ -211,6 +258,10 @@
 		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);
 }
@@ -363,6 +414,59 @@
 	function setCollectionMintMode(bool mode) external;
 }
 
+// Selector: d74d154f
+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);
+}
+
 interface UniqueRefungible is
 	Dummy,
 	ERC165,

--- a/tests/src/eth/reFungible.test.ts
+++ b/tests/src/eth/reFungible.test.ts
@@ -14,8 +14,8 @@
 // You should have received a copy of the GNU General Public License
 // along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
 
-import {createCollectionExpectSuccess} from '../util/helpers';
-import {collectionIdToAddress, createEthAccount, createEthAccountWithBalance, evmCollection, evmCollectionHelpers, GAS_ARGS, getCollectionAddressFromResult, itWeb3, normalizeEvents, tokenIdToAddress} from './util/helpers';
+import {createCollectionExpectSuccess, UNIQUE} from '../util/helpers';
+import {collectionIdToAddress, createEthAccount, createEthAccountWithBalance, evmCollection, evmCollectionHelpers, GAS_ARGS, getCollectionAddressFromResult, itWeb3, normalizeEvents, recordEthFee, tokenIdToAddress} from './util/helpers';
 import reFungibleAbi from './reFungibleAbi.json';
 import reFungibleTokenAbi from './reFungibleTokenAbi.json';
 import {expect} from 'chai';
@@ -26,7 +26,7 @@
     const helper = evmCollectionHelpers(web3, caller);
     const result = await helper.methods.createRefungibleCollection('Mint collection', '6', '6').send();
     const {collectionIdAddress} = await getCollectionAddressFromResult(api, result);
-    const contract = new web3.eth.Contract(reFungibleAbi as any, collectionIdAddress, {from: caller, ...GAS_ARGS});
+    const contract = evmCollection(web3, caller, collectionIdAddress, {type: 'ReFungible'});
     const nextTokenId = await contract.methods.nextTokenId().call();
     await contract.methods.mint(caller, nextTokenId).send();
     const totalSupply = await contract.methods.totalSupply().call();
@@ -38,7 +38,7 @@
     const helper = evmCollectionHelpers(web3, caller);
     const result = await helper.methods.createRefungibleCollection('Mint collection', '6', '6').send();
     const {collectionIdAddress} = await getCollectionAddressFromResult(api, result);
-    const contract = new web3.eth.Contract(reFungibleAbi as any, collectionIdAddress, {from: caller, ...GAS_ARGS});
+    const contract = evmCollection(web3, caller, collectionIdAddress, {type: 'ReFungible'});
 
     {
       const nextTokenId = await contract.methods.nextTokenId().call();
@@ -63,7 +63,7 @@
     const helper = evmCollectionHelpers(web3, caller);
     const result = await helper.methods.createRefungibleCollection('Mint collection', '6', '6').send();
     const {collectionIdAddress} = await getCollectionAddressFromResult(api, result);
-    const contract = new web3.eth.Contract(reFungibleAbi as any, collectionIdAddress, {from: caller, ...GAS_ARGS});
+    const contract = evmCollection(web3, caller, collectionIdAddress, {type: 'ReFungible'});
 
     const tokenId = await contract.methods.nextTokenId().call();
     await contract.methods.mint(caller, tokenId).send();
@@ -79,7 +79,7 @@
     const helper = evmCollectionHelpers(web3, caller);
     const result = await helper.methods.createRefungibleCollection('Mint collection', '6', '6').send();
     const {collectionIdAddress, collectionId} = await getCollectionAddressFromResult(api, result);
-    const contract = new web3.eth.Contract(reFungibleAbi as any, collectionIdAddress, {from: caller, ...GAS_ARGS});
+    const contract = evmCollection(web3, caller, collectionIdAddress, {type: 'ReFungible'});
 
     const tokenId = await contract.methods.nextTokenId().call();
     await contract.methods.mint(caller, tokenId).send();
@@ -105,7 +105,7 @@
     let result = await helper.methods.createRefungibleCollection('Mint collection', '6', '6').send();
     const {collectionIdAddress} = await getCollectionAddressFromResult(api, result);
     const receiver = createEthAccount(web3);
-    const contract = evmCollection(web3, owner, collectionIdAddress);
+    const contract = evmCollection(web3, owner, collectionIdAddress, {type: 'ReFungible'});
     const nextTokenId = await contract.methods.nextTokenId().call();
 
     expect(nextTokenId).to.be.equal('1');
@@ -137,7 +137,7 @@
     const helper = evmCollectionHelpers(web3, caller);
     const result = await helper.methods.createRefungibleCollection('Mint collection', '6', '6').send();
     const {collectionIdAddress} = await getCollectionAddressFromResult(api, result);
-    const contract = new web3.eth.Contract(reFungibleAbi as any, collectionIdAddress, {from: caller, ...GAS_ARGS});
+    const contract = evmCollection(web3, caller, collectionIdAddress, {type: 'ReFungible'});
 
     const receiver = createEthAccount(web3);
 
@@ -189,8 +189,148 @@
       expect(await contract.methods.tokenURI(+nextTokenId + 2).call()).to.be.equal('Test URI 2');
     }
   });
+
+  itWeb3('Can perform burn()', async ({web3, api, privateKeyWrapper}) => {
+    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
+    const helper = evmCollectionHelpers(web3, caller);
+    const result = await helper.methods.createRefungibleCollection('Mint collection', '6', '6').send();
+    const {collectionIdAddress} = await getCollectionAddressFromResult(api, result);
+    const contract = evmCollection(web3, caller, collectionIdAddress, {type: 'ReFungible'});
+
+    const tokenId = await contract.methods.nextTokenId().call();
+    await contract.methods.mint(caller, tokenId).send();
+    {
+      const result = await contract.methods.burn(tokenId).send();
+      const events = normalizeEvents(result.events);
+
+      expect(events).to.be.deep.equal([
+        {
+          address: collectionIdAddress,
+          event: 'Transfer',
+          args: {
+            from: caller,
+            to: '0x0000000000000000000000000000000000000000',
+            tokenId: tokenId.toString(),
+          },
+        },
+      ]);
+    }
+  });
+
+  itWeb3('Can perform transferFrom()', async ({web3, api, privateKeyWrapper}) => {
+    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
+    const helper = evmCollectionHelpers(web3, caller);
+    const result = await helper.methods.createRefungibleCollection('Mint collection', '6', '6').send();
+    const {collectionIdAddress} = await getCollectionAddressFromResult(api, result);
+    const contract = evmCollection(web3, caller, collectionIdAddress, {type: 'ReFungible'});
+
+    const receiver = createEthAccount(web3);
+
+    const tokenId = await contract.methods.nextTokenId().call();
+    await contract.methods.mint(caller, tokenId).send();
+    {
+      const result = await contract.methods.transferFrom(caller, receiver, tokenId).send();
+      const events = normalizeEvents(result.events);
+      expect(events).to.include.deep.members([
+        {
+          address: collectionIdAddress,
+          event: 'Transfer',
+          args: {
+            from: caller,
+            to: receiver,
+            tokenId: tokenId.toString(),
+          },
+        },
+      ]);
+    }
+
+    {
+      const balance = await contract.methods.balanceOf(receiver).call();
+      expect(+balance).to.equal(1);
+    }
+
+    {
+      const balance = await contract.methods.balanceOf(caller).call();
+      expect(+balance).to.equal(0);
+    }
+  });
+
+  itWeb3('Can perform transfer()', async ({web3, api, privateKeyWrapper}) => {
+    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
+    const helper = evmCollectionHelpers(web3, caller);
+    const result = await helper.methods.createRefungibleCollection('Mint collection', '6', '6').send();
+    const {collectionIdAddress} = await getCollectionAddressFromResult(api, result);
+    const contract = evmCollection(web3, caller, collectionIdAddress, {type: 'ReFungible'});
+
+    const receiver = createEthAccount(web3);
+
+    const tokenId = await contract.methods.nextTokenId().call();
+    await contract.methods.mint(caller, tokenId).send();
+
+    {
+      const result = await contract.methods.transfer(receiver, tokenId).send();
+      const events = normalizeEvents(result.events);
+      expect(events).to.include.deep.members([
+        {
+          address: collectionIdAddress,
+          event: 'Transfer',
+          args: {
+            from: caller,
+            to: receiver,
+            tokenId: tokenId.toString(),
+          },
+        },
+      ]);
+    }
+
+    {
+      const balance = await contract.methods.balanceOf(caller).call();
+      expect(+balance).to.equal(0);
+    }
+
+    {
+      const balance = await contract.methods.balanceOf(receiver).call();
+      expect(+balance).to.equal(1);
+    }
+  });
 });
 
+describe('RFT: Fees', () => {
+  itWeb3('transferFrom() call fee is less than 0.2UNQ', async ({web3, api, privateKeyWrapper}) => {
+    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
+    const helper = evmCollectionHelpers(web3, caller);
+    const result = await helper.methods.createRefungibleCollection('Mint collection', '6', '6').send();
+    const {collectionIdAddress} = await getCollectionAddressFromResult(api, result);
+    const contract = evmCollection(web3, caller, collectionIdAddress, {type: 'ReFungible'});
+
+    const receiver = createEthAccount(web3);
+
+    const tokenId = await contract.methods.nextTokenId().call();
+    await contract.methods.mint(caller, tokenId).send();
+
+    const cost = await recordEthFee(api, caller, () => contract.methods.transferFrom(caller, receiver, tokenId).send());
+    expect(cost < BigInt(0.2 * Number(UNIQUE)));
+    expect(cost > 0n);
+  });
+
+  itWeb3('transfer() call fee is less than 0.2UNQ', async ({web3, api, privateKeyWrapper}) => {
+    const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
+    const helper = evmCollectionHelpers(web3, caller);
+    const result = await helper.methods.createRefungibleCollection('Mint collection', '6', '6').send();
+    const {collectionIdAddress} = await getCollectionAddressFromResult(api, result);
+    const contract = evmCollection(web3, caller, collectionIdAddress, {type: 'ReFungible'});
+
+    const receiver = createEthAccount(web3);
+
+    const tokenId = await contract.methods.nextTokenId().call();
+    await contract.methods.mint(caller, tokenId).send();
+
+    const cost = await recordEthFee(api, caller, () => contract.methods.transfer(receiver, tokenId).send());
+    expect(cost < BigInt(0.2 * Number(UNIQUE)));
+    expect(cost > 0n);
+  });
+});
+
 describe('Common metadata', () => {
   itWeb3('Returns collection name', async ({api, web3, privateKeyWrapper}) => {
     const collection = await createCollectionExpectSuccess({
@@ -200,7 +340,7 @@
     const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
 
     const address = collectionIdToAddress(collection);
-    const contract = new web3.eth.Contract(reFungibleAbi as any, address, {from: caller, ...GAS_ARGS});
+    const contract = evmCollection(web3, caller, address, {type: 'ReFungible'});
     const name = await contract.methods.name().call();
 
     expect(name).to.equal('token name');
@@ -214,7 +354,7 @@
     const caller = await createEthAccountWithBalance(api, web3, privateKeyWrapper);
 
     const address = collectionIdToAddress(collection);
-    const contract = new web3.eth.Contract(reFungibleAbi as any, address, {from: caller, ...GAS_ARGS});
+    const contract = evmCollection(web3, caller, address, {type: 'ReFungible'});
     const symbol = await contract.methods.symbol().call();
 
     expect(symbol).to.equal('TOK');