git.delta.rocks / unique-network / refs/commits / 5a3fe2c70832

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//! # Refungible Pallet EVM API for tokens18//!19//! Provides ERC-721 standart support implementation and EVM API for unique extensions for Refungible Pallet.20//! Method implementations are mostly doing parameter conversion and calling Refungible Pallet methods.2122extern crate alloc;2324use core::{25	char::{REPLACEMENT_CHARACTER, decode_utf16},26	convert::TryInto,27};28use evm_coder::{29	ToLog,30	execution::*,31	generate_stubgen, solidity, solidity_interface,32	types::*,33	weight,34	custom_signature::{SignatureUnit, FunctionSignature, SignaturePreferences},35	make_signature,36};37use frame_support::{BoundedBTreeMap, BoundedVec};38use pallet_common::{39	CollectionHandle, CollectionPropertyPermissions,40	erc::{CommonEvmHandler, CollectionCall, static_property::key},41};42use pallet_evm::{account::CrossAccountId, PrecompileHandle};43use pallet_evm_coder_substrate::{call, dispatch_to_evm};44use pallet_structure::{SelfWeightOf as StructureWeight, weights::WeightInfo as _};45use sp_core::H160;46use sp_std::{collections::btree_map::BTreeMap, vec::Vec, vec};47use up_data_structs::{48	CollectionId, CollectionPropertiesVec, mapping::TokenAddressMapping, Property, PropertyKey,49	PropertyKeyPermission, PropertyPermission, TokenId,50};5152use crate::{53	AccountBalance, Balance, Config, CreateItemData, Pallet, RefungibleHandle, SelfWeightOf,54	TokenProperties, TokensMinted, TotalSupply, weights::WeightInfo,55};5657pub const ADDRESS_FOR_PARTIALLY_OWNED_TOKENS: H160 = H160::repeat_byte(0xff);5859/// @title A contract that allows to set and delete token properties and change token property permissions.60#[solidity_interface(name = TokenProperties)]61impl<T: Config> RefungibleHandle<T> {62	/// @notice Set permissions for token property.63	/// @dev Throws error if `msg.sender` is not admin or owner of the collection.64	/// @param key Property key.65	/// @param isMutable Permission to mutate property.66	/// @param collectionAdmin Permission to mutate property by collection admin if property is mutable.67	/// @param tokenOwner Permission to mutate property by token owner if property is mutable.68	fn set_token_property_permission(69		&mut self,70		caller: caller,71		key: string,72		is_mutable: bool,73		collection_admin: bool,74		token_owner: bool,75	) -> Result<()> {76		let caller = T::CrossAccountId::from_eth(caller);77		<Pallet<T>>::set_token_property_permissions(78			self,79			&caller,80			vec![PropertyKeyPermission {81				key: <Vec<u8>>::from(key)82					.try_into()83					.map_err(|_| "too long key")?,84				permission: PropertyPermission {85					mutable: is_mutable,86					collection_admin,87					token_owner,88				},89			}],90		)91		.map_err(dispatch_to_evm::<T>)92	}9394	/// @notice Set token property value.95	/// @dev Throws error if `msg.sender` has no permission to edit the property.96	/// @param tokenId ID of the token.97	/// @param key Property key.98	/// @param value Property value.99	fn set_property(100		&mut self,101		caller: caller,102		token_id: uint256,103		key: string,104		value: bytes,105	) -> Result<()> {106		let caller = T::CrossAccountId::from_eth(caller);107		let token_id: u32 = token_id.try_into().map_err(|_| "token id overflow")?;108		let key = <Vec<u8>>::from(key)109			.try_into()110			.map_err(|_| "key too long")?;111		let value = value.0.try_into().map_err(|_| "value too long")?;112113		let nesting_budget = self114			.recorder115			.weight_calls_budget(<StructureWeight<T>>::find_parent());116117		<Pallet<T>>::set_token_property(118			self,119			&caller,120			TokenId(token_id),121			Property { key, value },122			&nesting_budget,123		)124		.map_err(dispatch_to_evm::<T>)125	}126127	/// @notice Set token properties value.128	/// @dev Throws error if `msg.sender` has no permission to edit the property.129	/// @param tokenId ID of the token.130	/// @param properties settable properties131	fn set_properties(132		&mut self,133		caller: caller,134		token_id: uint256,135		properties: Vec<(string, bytes)>,136	) -> Result<()> {137		let caller = T::CrossAccountId::from_eth(caller);138		let token_id: u32 = token_id.try_into().map_err(|_| "token id overflow")?;139140		let nesting_budget = self141			.recorder142			.weight_calls_budget(<StructureWeight<T>>::find_parent());143144		let properties = properties145			.into_iter()146			.map(|(key, value)| {147				let key = <Vec<u8>>::from(key)148					.try_into()149					.map_err(|_| "key too large")?;150151				let value = value.0.try_into().map_err(|_| "value too large")?;152153				Ok(Property { key, value })154			})155			.collect::<Result<Vec<_>>>()?;156157		<Pallet<T>>::set_token_properties(158			self,159			&caller,160			TokenId(token_id),161			properties.into_iter(),162			<Pallet<T>>::token_exists(&self, TokenId(token_id)),163			&nesting_budget,164		)165		.map_err(dispatch_to_evm::<T>)166	}167168	/// @notice Delete token property value.169	/// @dev Throws error if `msg.sender` has no permission to edit the property.170	/// @param tokenId ID of the token.171	/// @param key Property key.172	fn delete_property(&mut self, token_id: uint256, caller: caller, key: string) -> Result<()> {173		let caller = T::CrossAccountId::from_eth(caller);174		let token_id: u32 = token_id.try_into().map_err(|_| "token id overflow")?;175		let key = <Vec<u8>>::from(key)176			.try_into()177			.map_err(|_| "key too long")?;178179		let nesting_budget = self180			.recorder181			.weight_calls_budget(<StructureWeight<T>>::find_parent());182183		<Pallet<T>>::delete_token_property(self, &caller, TokenId(token_id), key, &nesting_budget)184			.map_err(dispatch_to_evm::<T>)185	}186187	/// @notice Get token property value.188	/// @dev Throws error if key not found189	/// @param tokenId ID of the token.190	/// @param key Property key.191	/// @return Property value bytes192	fn property(&self, token_id: uint256, key: string) -> Result<bytes> {193		let token_id: u32 = token_id.try_into().map_err(|_| "token id overflow")?;194		let key = <Vec<u8>>::from(key)195			.try_into()196			.map_err(|_| "key too long")?;197198		let props = <TokenProperties<T>>::get((self.id, token_id));199		let prop = props.get(&key).ok_or("key not found")?;200201		Ok(prop.to_vec().into())202	}203}204205#[derive(ToLog)]206pub enum ERC721Events {207	/// @dev This event emits when NFTs are created (`from` == 0) and destroyed208	///  (`to` == 0). Exception: during contract creation, any number of RFTs209	///  may be created and assigned without emitting Transfer.210	Transfer {211		#[indexed]212		from: address,213		#[indexed]214		to: address,215		#[indexed]216		token_id: uint256,217	},218	/// @dev Not supported219	Approval {220		#[indexed]221		owner: address,222		#[indexed]223		approved: address,224		#[indexed]225		token_id: uint256,226	},227	/// @dev Not supported228	#[allow(dead_code)]229	ApprovalForAll {230		#[indexed]231		owner: address,232		#[indexed]233		operator: address,234		approved: bool,235	},236}237238#[derive(ToLog)]239pub enum ERC721UniqueMintableEvents {240	/// @dev Not supported241	#[allow(dead_code)]242	MintingFinished {},243}244245#[solidity_interface(name = ERC721Metadata)]246impl<T: Config> RefungibleHandle<T>247where248	T::AccountId: From<[u8; 32]>,249{250	/// @notice A descriptive name for a collection of NFTs in this contract251	/// @dev real implementation of this function lies in `ERC721UniqueExtensions`252	#[solidity(hide, rename_selector = "name")]253	fn name_proxy(&self) -> Result<string> {254		self.name()255	}256257	/// @notice An abbreviated name for NFTs in this contract258	/// @dev real implementation of this function lies in `ERC721UniqueExtensions`259	#[solidity(hide, rename_selector = "symbol")]260	fn symbol_proxy(&self) -> Result<string> {261		self.symbol()262	}263264	/// @notice A distinct Uniform Resource Identifier (URI) for a given asset.265	///266	/// @dev If the token has a `url` property and it is not empty, it is returned.267	///  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`.268	///  If the collection property `baseURI` is empty or absent, return "" (empty string)269	///  otherwise, if token property `suffix` present and is non-empty, return concatenation of baseURI and suffix270	///  otherwise, return concatenation of `baseURI` and stringified token id (decimal stringifying, without paddings).271	///272	/// @return token's const_metadata273	#[solidity(rename_selector = "tokenURI")]274	fn token_uri(&self, token_id: uint256) -> Result<string> {275		let token_id_u32: u32 = token_id.try_into().map_err(|_| "token id overflow")?;276277		match get_token_property(self, token_id_u32, &key::url()).as_deref() {278			Err(_) | Ok("") => (),279			Ok(url) => {280				return Ok(url.into());281			}282		};283284		let base_uri =285			pallet_common::Pallet::<T>::get_collection_property(self.id, &key::base_uri())286				.map(BoundedVec::into_inner)287				.map(string::from_utf8)288				.transpose()289				.map_err(|e| {290					Error::Revert(alloc::format!(291						"Can not convert value \"baseURI\" to string with error \"{}\"",292						e293					))294				})?;295296		let base_uri = match base_uri.as_deref() {297			None | Some("") => {298				return Ok("".into());299			}300			Some(base_uri) => base_uri.into(),301		};302303		Ok(304			match get_token_property(self, token_id_u32, &key::suffix()).as_deref() {305				Err(_) | Ok("") => base_uri,306				Ok(suffix) => base_uri + suffix,307			},308		)309	}310}311312/// @title ERC-721 Non-Fungible Token Standard, optional enumeration extension313/// @dev See https://eips.ethereum.org/EIPS/eip-721314#[solidity_interface(name = ERC721Enumerable)]315impl<T: Config> RefungibleHandle<T> {316	/// @notice Enumerate valid RFTs317	/// @param index A counter less than `totalSupply()`318	/// @return The token identifier for the `index`th NFT,319	///  (sort order not specified)320	fn token_by_index(&self, index: uint256) -> Result<uint256> {321		Ok(index)322	}323324	/// Not implemented325	fn token_of_owner_by_index(&self, _owner: address, _index: uint256) -> Result<uint256> {326		// TODO: Not implemetable327		Err("not implemented".into())328	}329330	/// @notice Count RFTs tracked by this contract331	/// @return A count of valid RFTs tracked by this contract, where each one of332	///  them has an assigned and queryable owner not equal to the zero address333	fn total_supply(&self) -> Result<uint256> {334		self.consume_store_reads(1)?;335		Ok(<Pallet<T>>::total_supply(self).into())336	}337}338339/// @title ERC-721 Non-Fungible Token Standard340/// @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md341#[solidity_interface(name = ERC721, events(ERC721Events))]342impl<T: Config> RefungibleHandle<T> {343	/// @notice Count all RFTs assigned to an owner344	/// @dev RFTs assigned to the zero address are considered invalid, and this345	///  function throws for queries about the zero address.346	/// @param owner An address for whom to query the balance347	/// @return The number of RFTs owned by `owner`, possibly zero348	fn balance_of(&self, owner: address) -> Result<uint256> {349		self.consume_store_reads(1)?;350		let owner = T::CrossAccountId::from_eth(owner);351		let balance = <AccountBalance<T>>::get((self.id, owner));352		Ok(balance.into())353	}354355	/// @notice Find the owner of an RFT356	/// @dev RFTs assigned to zero address are considered invalid, and queries357	///  about them do throw.358	///  Returns special 0xffffffffffffffffffffffffffffffffffffffff address for359	///  the tokens that are partially owned.360	/// @param tokenId The identifier for an RFT361	/// @return The address of the owner of the RFT362	fn owner_of(&self, token_id: uint256) -> Result<address> {363		self.consume_store_reads(2)?;364		let token = token_id.try_into()?;365		let owner = <Pallet<T>>::token_owner(self.id, token);366		Ok(owner367			.map(|address| *address.as_eth())368			.unwrap_or_else(|| ADDRESS_FOR_PARTIALLY_OWNED_TOKENS))369	}370371	/// @dev Not implemented372	fn safe_transfer_from_with_data(373		&mut self,374		_from: address,375		_to: address,376		_token_id: uint256,377		_data: bytes,378	) -> Result<void> {379		// TODO: Not implemetable380		Err("not implemented".into())381	}382383	/// @dev Not implemented384	fn safe_transfer_from(385		&mut self,386		_from: address,387		_to: address,388		_token_id: uint256,389	) -> Result<void> {390		// TODO: Not implemetable391		Err("not implemented".into())392	}393394	/// @notice Transfer ownership of an RFT -- THE CALLER IS RESPONSIBLE395	///  TO CONFIRM THAT `to` IS CAPABLE OF RECEIVING NFTS OR ELSE396	///  THEY MAY BE PERMANENTLY LOST397	/// @dev Throws unless `msg.sender` is the current owner or an authorized398	///  operator for this RFT. Throws if `from` is not the current owner. Throws399	///  if `to` is the zero address. Throws if `tokenId` is not a valid RFT.400	///  Throws if RFT pieces have multiple owners.401	/// @param from The current owner of the NFT402	/// @param to The new owner403	/// @param tokenId The NFT to transfer404	#[weight(<SelfWeightOf<T>>::transfer_from_creating_removing())]405	fn transfer_from(406		&mut self,407		caller: caller,408		from: address,409		to: address,410		token_id: uint256,411	) -> Result<void> {412		let caller = T::CrossAccountId::from_eth(caller);413		let from = T::CrossAccountId::from_eth(from);414		let to = T::CrossAccountId::from_eth(to);415		let token = token_id.try_into()?;416		let budget = self417			.recorder418			.weight_calls_budget(<StructureWeight<T>>::find_parent());419420		let balance = balance(&self, token, &from)?;421		ensure_single_owner(&self, token, balance)?;422423		<Pallet<T>>::transfer_from(self, &caller, &from, &to, token, balance, &budget)424			.map_err(dispatch_to_evm::<T>)?;425426		Ok(())427	}428429	/// @dev Not implemented430	fn approve(&mut self, _caller: caller, _approved: address, _token_id: uint256) -> Result<void> {431		Err("not implemented".into())432	}433434	/// @dev Not implemented435	fn set_approval_for_all(436		&mut self,437		_caller: caller,438		_operator: address,439		_approved: bool,440	) -> Result<void> {441		// TODO: Not implemetable442		Err("not implemented".into())443	}444445	/// @dev Not implemented446	fn get_approved(&self, _token_id: uint256) -> Result<address> {447		// TODO: Not implemetable448		Err("not implemented".into())449	}450451	/// @dev Not implemented452	fn is_approved_for_all(&self, _owner: address, _operator: address) -> Result<address> {453		// TODO: Not implemetable454		Err("not implemented".into())455	}456}457458/// Returns amount of pieces of `token` that `owner` have459pub fn balance<T: Config>(460	collection: &RefungibleHandle<T>,461	token: TokenId,462	owner: &T::CrossAccountId,463) -> Result<u128> {464	collection.consume_store_reads(1)?;465	let balance = <Balance<T>>::get((collection.id, token, &owner));466	Ok(balance)467}468469/// Throws if `owner_balance` is lower than total amount of `token` pieces470pub fn ensure_single_owner<T: Config>(471	collection: &RefungibleHandle<T>,472	token: TokenId,473	owner_balance: u128,474) -> Result<()> {475	collection.consume_store_reads(1)?;476	let total_supply = <TotalSupply<T>>::get((collection.id, token));477	if total_supply != owner_balance {478		return Err("token has multiple owners".into());479	}480	Ok(())481}482483/// @title ERC721 Token that can be irreversibly burned (destroyed).484#[solidity_interface(name = ERC721Burnable)]485impl<T: Config> RefungibleHandle<T> {486	/// @notice Burns a specific ERC721 token.487	/// @dev Throws unless `msg.sender` is the current RFT owner, or an authorized488	///  operator of the current owner.489	/// @param tokenId The RFT to approve490	#[weight(<SelfWeightOf<T>>::burn_item_fully())]491	fn burn(&mut self, caller: caller, token_id: uint256) -> Result<void> {492		let caller = T::CrossAccountId::from_eth(caller);493		let token = token_id.try_into()?;494495		let balance = balance(&self, token, &caller)?;496		ensure_single_owner(&self, token, balance)?;497498		<Pallet<T>>::burn(self, &caller, token, balance).map_err(dispatch_to_evm::<T>)?;499		Ok(())500	}501}502503/// @title ERC721 minting logic.504#[solidity_interface(name = ERC721UniqueMintable, events(ERC721UniqueMintableEvents))]505impl<T: Config> RefungibleHandle<T> {506	fn minting_finished(&self) -> Result<bool> {507		Ok(false)508	}509510	/// @notice Function to mint token.511	/// @param to The new owner512	/// @return uint256 The id of the newly minted token513	#[weight(<SelfWeightOf<T>>::create_item())]514	fn mint(&mut self, caller: caller, to: address) -> Result<uint256> {515		let token_id: uint256 = <TokensMinted<T>>::get(self.id)516			.checked_add(1)517			.ok_or("item id overflow")?518			.into();519		self.mint_check_id(caller, to, token_id)?;520		Ok(token_id)521	}522523	/// @notice Function to mint token.524	/// @dev `tokenId` should be obtained with `nextTokenId` method,525	///  unlike standard, you can't specify it manually526	/// @param to The new owner527	/// @param tokenId ID of the minted RFT528	#[solidity(hide, rename_selector = "mint")]529	#[weight(<SelfWeightOf<T>>::create_item())]530	fn mint_check_id(&mut self, caller: caller, to: address, token_id: uint256) -> Result<bool> {531		let caller = T::CrossAccountId::from_eth(caller);532		let to = T::CrossAccountId::from_eth(to);533		let token_id: u32 = token_id.try_into()?;534		let budget = self535			.recorder536			.weight_calls_budget(<StructureWeight<T>>::find_parent());537538		if <TokensMinted<T>>::get(self.id)539			.checked_add(1)540			.ok_or("item id overflow")?541			!= token_id542		{543			return Err("item id should be next".into());544		}545546		let users = [(to.clone(), 1)]547			.into_iter()548			.collect::<BTreeMap<_, _>>()549			.try_into()550			.unwrap();551		<Pallet<T>>::create_item(552			self,553			&caller,554			CreateItemData::<T::CrossAccountId> {555				users,556				properties: CollectionPropertiesVec::default(),557			},558			&budget,559		)560		.map_err(dispatch_to_evm::<T>)?;561562		Ok(true)563	}564565	/// @notice Function to mint token with the given tokenUri.566	/// @param to The new owner567	/// @param tokenUri Token URI that would be stored in the NFT properties568	/// @return uint256 The id of the newly minted token569	#[solidity(rename_selector = "mintWithTokenURI")]570	#[weight(<SelfWeightOf<T>>::create_item())]571	fn mint_with_token_uri(572		&mut self,573		caller: caller,574		to: address,575		token_uri: string,576	) -> Result<uint256> {577		let token_id: uint256 = <TokensMinted<T>>::get(self.id)578			.checked_add(1)579			.ok_or("item id overflow")?580			.into();581		self.mint_with_token_uri_check_id(caller, to, token_id, token_uri)?;582		Ok(token_id)583	}584585	/// @notice Function to mint token with the given tokenUri.586	/// @dev `tokenId` should be obtained with `nextTokenId` method,587	///  unlike standard, you can't specify it manually588	/// @param to The new owner589	/// @param tokenId ID of the minted RFT590	/// @param tokenUri Token URI that would be stored in the RFT properties591	#[solidity(hide, rename_selector = "mintWithTokenURI")]592	#[weight(<SelfWeightOf<T>>::create_item())]593	fn mint_with_token_uri_check_id(594		&mut self,595		caller: caller,596		to: address,597		token_id: uint256,598		token_uri: string,599	) -> Result<bool> {600		let key = key::url();601		let permission = get_token_permission::<T>(self.id, &key)?;602		if !permission.collection_admin {603			return Err("Operation is not allowed".into());604		}605606		let caller = T::CrossAccountId::from_eth(caller);607		let to = T::CrossAccountId::from_eth(to);608		let token_id: u32 = token_id.try_into().map_err(|_| "amount overflow")?;609		let budget = self610			.recorder611			.weight_calls_budget(<StructureWeight<T>>::find_parent());612613		if <TokensMinted<T>>::get(self.id)614			.checked_add(1)615			.ok_or("item id overflow")?616			!= token_id617		{618			return Err("item id should be next".into());619		}620621		let mut properties = CollectionPropertiesVec::default();622		properties623			.try_push(Property {624				key,625				value: token_uri626					.into_bytes()627					.try_into()628					.map_err(|_| "token uri is too long")?,629			})630			.map_err(|e| Error::Revert(alloc::format!("Can't add property: {:?}", e)))?;631632		let users = [(to.clone(), 1)]633			.into_iter()634			.collect::<BTreeMap<_, _>>()635			.try_into()636			.unwrap();637		<Pallet<T>>::create_item(638			self,639			&caller,640			CreateItemData::<T::CrossAccountId> { users, properties },641			&budget,642		)643		.map_err(dispatch_to_evm::<T>)?;644		Ok(true)645	}646647	/// @dev Not implemented648	fn finish_minting(&mut self, _caller: caller) -> Result<bool> {649		Err("not implementable".into())650	}651}652653fn get_token_property<T: Config>(654	collection: &CollectionHandle<T>,655	token_id: u32,656	key: &up_data_structs::PropertyKey,657) -> Result<string> {658	collection.consume_store_reads(1)?;659	let properties = <TokenProperties<T>>::try_get((collection.id, token_id))660		.map_err(|_| Error::Revert("Token properties not found".into()))?;661	if let Some(property) = properties.get(key) {662		return Ok(string::from_utf8_lossy(property).into());663	}664665	Err("Property tokenURI not found".into())666}667668fn get_token_permission<T: Config>(669	collection_id: CollectionId,670	key: &PropertyKey,671) -> Result<PropertyPermission> {672	let token_property_permissions = CollectionPropertyPermissions::<T>::try_get(collection_id)673		.map_err(|_| Error::Revert("No permissions for collection".into()))?;674	let a = token_property_permissions675		.get(key)676		.map(Clone::clone)677		.ok_or_else(|| {678			let key = string::from_utf8(key.clone().into_inner()).unwrap_or_default();679			Error::Revert(alloc::format!("No permission for key {}", key))680		})?;681	Ok(a)682}683684/// @title Unique extensions for ERC721.685#[solidity_interface(name = ERC721UniqueExtensions)]686impl<T: Config> RefungibleHandle<T>687where688	T::AccountId: From<[u8; 32]>,689{690	/// @notice A descriptive name for a collection of NFTs in this contract691	fn name(&self) -> Result<string> {692		Ok(decode_utf16(self.name.iter().copied())693			.map(|r| r.unwrap_or(REPLACEMENT_CHARACTER))694			.collect::<string>())695	}696697	/// @notice An abbreviated name for NFTs in this contract698	fn symbol(&self) -> Result<string> {699		Ok(string::from_utf8_lossy(&self.token_prefix).into())700	}701702	/// @notice Transfer ownership of an RFT703	/// @dev Throws unless `msg.sender` is the current owner. Throws if `to`704	///  is the zero address. Throws if `tokenId` is not a valid RFT.705	///  Throws if RFT pieces have multiple owners.706	/// @param to The new owner707	/// @param tokenId The RFT to transfer708	#[weight(<SelfWeightOf<T>>::transfer_creating_removing())]709	fn transfer(&mut self, caller: caller, to: address, token_id: uint256) -> Result<void> {710		let caller = T::CrossAccountId::from_eth(caller);711		let to = T::CrossAccountId::from_eth(to);712		let token = token_id.try_into()?;713		let budget = self714			.recorder715			.weight_calls_budget(<StructureWeight<T>>::find_parent());716717		let balance = balance(self, token, &caller)?;718		ensure_single_owner(self, token, balance)?;719720		<Pallet<T>>::transfer(self, &caller, &to, token, balance, &budget)721			.map_err(dispatch_to_evm::<T>)?;722		Ok(())723	}724725	/// @notice Transfer ownership of an RFT726	/// @dev Throws unless `msg.sender` is the current owner. Throws if `to`727	///  is the zero address. Throws if `tokenId` is not a valid RFT.728	///  Throws if RFT pieces have multiple owners.729	/// @param to The new owner730	/// @param tokenId The RFT to transfer731	#[weight(<SelfWeightOf<T>>::transfer_creating_removing())]732	fn transfer_from_cross(733		&mut self,734		caller: caller,735		from: EthCrossAccount,736		to: EthCrossAccount,737		token_id: uint256,738	) -> Result<void> {739		let caller = T::CrossAccountId::from_eth(caller);740		let from = from.into_sub_cross_account::<T>()?;741		let to = to.into_sub_cross_account::<T>()?;742		let token_id = token_id.try_into()?;743		let budget = self744			.recorder745			.weight_calls_budget(<StructureWeight<T>>::find_parent());746747		let balance = balance(self, token_id, &from)?;748		ensure_single_owner(self, token_id, balance)?;749750		Pallet::<T>::transfer_from(self, &caller, &from, &to, token_id, balance, &budget)751			.map_err(dispatch_to_evm::<T>)?;752		Ok(())753	}754755	/// @notice Burns a specific ERC721 token.756	/// @dev Throws unless `msg.sender` is the current owner or an authorized757	///  operator for this RFT. Throws if `from` is not the current owner. Throws758	///  if `to` is the zero address. Throws if `tokenId` is not a valid RFT.759	///  Throws if RFT pieces have multiple owners.760	/// @param from The current owner of the RFT761	/// @param tokenId The RFT to transfer762	#[weight(<SelfWeightOf<T>>::burn_from())]763	fn burn_from(&mut self, caller: caller, from: address, token_id: uint256) -> Result<void> {764		let caller = T::CrossAccountId::from_eth(caller);765		let from = T::CrossAccountId::from_eth(from);766		let token = token_id.try_into()?;767		let budget = self768			.recorder769			.weight_calls_budget(<StructureWeight<T>>::find_parent());770771		let balance = balance(self, token, &from)?;772		ensure_single_owner(self, token, balance)?;773774		<Pallet<T>>::burn_from(self, &caller, &from, token, balance, &budget)775			.map_err(dispatch_to_evm::<T>)?;776		Ok(())777	}778779	/// @notice Burns a specific ERC721 token.780	/// @dev Throws unless `msg.sender` is the current owner or an authorized781	///  operator for this RFT. Throws if `from` is not the current owner. Throws782	///  if `to` is the zero address. Throws if `tokenId` is not a valid RFT.783	///  Throws if RFT pieces have multiple owners.784	/// @param from The current owner of the RFT785	/// @param tokenId The RFT to transfer786	#[weight(<SelfWeightOf<T>>::burn_from())]787	fn burn_from_cross(788		&mut self,789		caller: caller,790		from: EthCrossAccount,791		token_id: uint256,792	) -> Result<void> {793		let caller = T::CrossAccountId::from_eth(caller);794		let from = from.into_sub_cross_account::<T>()?;795		let token = token_id.try_into()?;796		let budget = self797			.recorder798			.weight_calls_budget(<StructureWeight<T>>::find_parent());799800		let balance = balance(self, token, &from)?;801		ensure_single_owner(self, token, balance)?;802803		<Pallet<T>>::burn_from(self, &caller, &from, token, balance, &budget)804			.map_err(dispatch_to_evm::<T>)?;805		Ok(())806	}807808	/// @notice Returns next free RFT ID.809	fn next_token_id(&self) -> Result<uint256> {810		self.consume_store_reads(1)?;811		Ok(<TokensMinted<T>>::get(self.id)812			.checked_add(1)813			.ok_or("item id overflow")?814			.into())815	}816817	/// @notice Function to mint multiple tokens.818	/// @dev `tokenIds` should be an array of consecutive numbers and first number819	///  should be obtained with `nextTokenId` method820	/// @param to The new owner821	/// @param tokenIds IDs of the minted RFTs822	#[solidity(hide)]823	#[weight(<SelfWeightOf<T>>::create_multiple_items(token_ids.len() as u32))]824	fn mint_bulk(&mut self, caller: caller, to: address, token_ids: Vec<uint256>) -> Result<bool> {825		let caller = T::CrossAccountId::from_eth(caller);826		let to = T::CrossAccountId::from_eth(to);827		let mut expected_index = <TokensMinted<T>>::get(self.id)828			.checked_add(1)829			.ok_or("item id overflow")?;830		let budget = self831			.recorder832			.weight_calls_budget(<StructureWeight<T>>::find_parent());833834		let total_tokens = token_ids.len();835		for id in token_ids.into_iter() {836			let id: u32 = id.try_into().map_err(|_| "token id overflow")?;837			if id != expected_index {838				return Err("item id should be next".into());839			}840			expected_index = expected_index.checked_add(1).ok_or("item id overflow")?;841		}842		let users = [(to.clone(), 1)]843			.into_iter()844			.collect::<BTreeMap<_, _>>()845			.try_into()846			.unwrap();847		let create_item_data = CreateItemData::<T::CrossAccountId> {848			users,849			properties: CollectionPropertiesVec::default(),850		};851		let data = (0..total_tokens)852			.map(|_| create_item_data.clone())853			.collect();854855		<Pallet<T>>::create_multiple_items(self, &caller, data, &budget)856			.map_err(dispatch_to_evm::<T>)?;857		Ok(true)858	}859860	/// @notice Function to mint multiple tokens with the given tokenUris.861	/// @dev `tokenIds` is array of pairs of token ID and token URI. Token IDs should be consecutive862	///  numbers and first number should be obtained with `nextTokenId` method863	/// @param to The new owner864	/// @param tokens array of pairs of token ID and token URI for minted tokens865	#[solidity(hide, rename_selector = "mintBulkWithTokenURI")]866	#[weight(<SelfWeightOf<T>>::create_multiple_items(tokens.len() as u32))]867	fn mint_bulk_with_token_uri(868		&mut self,869		caller: caller,870		to: address,871		tokens: Vec<(uint256, string)>,872	) -> Result<bool> {873		let key = key::url();874		let caller = T::CrossAccountId::from_eth(caller);875		let to = T::CrossAccountId::from_eth(to);876		let mut expected_index = <TokensMinted<T>>::get(self.id)877			.checked_add(1)878			.ok_or("item id overflow")?;879		let budget = self880			.recorder881			.weight_calls_budget(<StructureWeight<T>>::find_parent());882883		let mut data = Vec::with_capacity(tokens.len());884		let users: BoundedBTreeMap<_, _, _> = [(to.clone(), 1)]885			.into_iter()886			.collect::<BTreeMap<_, _>>()887			.try_into()888			.unwrap();889		for (id, token_uri) in tokens {890			let id: u32 = id.try_into().map_err(|_| "token id overflow")?;891			if id != expected_index {892				return Err("item id should be next".into());893			}894			expected_index = expected_index.checked_add(1).ok_or("item id overflow")?;895896			let mut properties = CollectionPropertiesVec::default();897			properties898				.try_push(Property {899					key: key.clone(),900					value: token_uri901						.into_bytes()902						.try_into()903						.map_err(|_| "token uri is too long")?,904				})905				.map_err(|e| Error::Revert(alloc::format!("Can't add property: {:?}", e)))?;906907			let create_item_data = CreateItemData::<T::CrossAccountId> {908				users: users.clone(),909				properties,910			};911			data.push(create_item_data);912		}913914		<Pallet<T>>::create_multiple_items(self, &caller, data, &budget)915			.map_err(dispatch_to_evm::<T>)?;916		Ok(true)917	}918919	/// Returns EVM address for refungible token920	///921	/// @param token ID of the token922	fn token_contract_address(&self, token: uint256) -> Result<address> {923		Ok(T::EvmTokenAddressMapping::token_to_address(924			self.id,925			token.try_into().map_err(|_| "token id overflow")?,926		))927	}928}929930#[solidity_interface(931	name = UniqueRefungible,932	is(933		ERC721,934		ERC721Enumerable,935		ERC721UniqueExtensions,936		ERC721UniqueMintable,937		ERC721Burnable,938		ERC721Metadata(if(this.flags.erc721metadata)),939		Collection(via(common_mut returns CollectionHandle<T>)),940		TokenProperties,941	)942)]943impl<T: Config> RefungibleHandle<T> where T::AccountId: From<[u8; 32]> + AsRef<[u8; 32]> {}944945// Not a tests, but code generators946generate_stubgen!(gen_impl, UniqueRefungibleCall<()>, true);947generate_stubgen!(gen_iface, UniqueRefungibleCall<()>, false);948949impl<T: Config> CommonEvmHandler for RefungibleHandle<T>950where951	T::AccountId: From<[u8; 32]> + AsRef<[u8; 32]>,952{953	const CODE: &'static [u8] = include_bytes!("./stubs/UniqueRefungible.raw");954	fn call(955		self,956		handle: &mut impl PrecompileHandle,957	) -> Option<pallet_common::erc::PrecompileResult> {958		call::<T, UniqueRefungibleCall<T>, _, _>(handle, self)959	}960}