git.delta.rocks / unique-network / refs/commits / c2ed35549db9

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 alloc::string::ToString;25use core::{26	char::{REPLACEMENT_CHARACTER, decode_utf16},27	convert::TryInto,28};29use evm_coder::{ToLog, execution::*, generate_stubgen, solidity, solidity_interface, types::*, weight};30use frame_support::BoundedBTreeMap;31use pallet_common::{32	CollectionHandle, CollectionPropertyPermissions,33	erc::{34		CommonEvmHandler, CollectionCall,35		static_property::{key, value as property_value},36	},37};38use pallet_evm::{account::CrossAccountId, PrecompileHandle};39use pallet_evm_coder_substrate::{call, dispatch_to_evm};40use pallet_structure::{SelfWeightOf as StructureWeight, weights::WeightInfo as _};41use sp_core::H160;42use sp_std::{collections::btree_map::BTreeMap, vec::Vec, vec};43use up_data_structs::{44	CollectionId, CollectionPropertiesVec, mapping::TokenAddressMapping, Property, PropertyKey,45	PropertyKeyPermission, PropertyPermission, TokenId,46};4748use crate::{49	AccountBalance, Balance, Config, CreateItemData, Pallet, RefungibleHandle, SelfWeightOf,50	TokenProperties, TokensMinted, TotalSupply, weights::WeightInfo,51};5253pub const ADDRESS_FOR_PARTIALLY_OWNED_TOKENS: H160 = H160::repeat_byte(0xff);5455/// @title A contract that allows to set and delete token properties and change token property permissions.56#[solidity_interface(name = "TokenProperties")]57impl<T: Config> RefungibleHandle<T> {58	/// @notice Set permissions for token property.59	/// @dev Throws error if `msg.sender` is not admin or owner of the collection.60	/// @param key Property key.61	/// @param is_mutable Permission to mutate property.62	/// @param collection_admin Permission to mutate property by collection admin if property is mutable.63	/// @param token_owner Permission to mutate property by token owner if property is mutable.64	fn set_token_property_permission(65		&mut self,66		caller: caller,67		key: string,68		is_mutable: bool,69		collection_admin: bool,70		token_owner: bool,71	) -> Result<()> {72		let caller = T::CrossAccountId::from_eth(caller);73		<Pallet<T>>::set_token_property_permissions(74			self,75			&caller,76			vec![PropertyKeyPermission {77				key: <Vec<u8>>::from(key)78					.try_into()79					.map_err(|_| "too long key")?,80				permission: PropertyPermission {81					mutable: is_mutable,82					collection_admin,83					token_owner,84				},85			}],86		)87		.map_err(dispatch_to_evm::<T>)88	}8990	/// @notice Set token property value.91	/// @dev Throws error if `msg.sender` has no permission to edit the property.92	/// @param tokenId ID of the token.93	/// @param key Property key.94	/// @param value Property value.95	fn set_property(96		&mut self,97		caller: caller,98		token_id: uint256,99		key: string,100		value: bytes,101	) -> Result<()> {102		let caller = T::CrossAccountId::from_eth(caller);103		let token_id: u32 = token_id.try_into().map_err(|_| "token id overflow")?;104		let key = <Vec<u8>>::from(key)105			.try_into()106			.map_err(|_| "key too long")?;107		let value = value.try_into().map_err(|_| "value too long")?;108109		let nesting_budget = self110			.recorder111			.weight_calls_budget(<StructureWeight<T>>::find_parent());112113		<Pallet<T>>::set_token_property(114			self,115			&caller,116			TokenId(token_id),117			Property { key, value },118			&nesting_budget,119		)120		.map_err(dispatch_to_evm::<T>)121	}122123	/// @notice Delete token property value.124	/// @dev Throws error if `msg.sender` has no permission to edit the property.125	/// @param tokenId ID of the token.126	/// @param key Property key.127	fn delete_property(&mut self, token_id: uint256, caller: caller, key: string) -> Result<()> {128		let caller = T::CrossAccountId::from_eth(caller);129		let token_id: u32 = token_id.try_into().map_err(|_| "token id overflow")?;130		let key = <Vec<u8>>::from(key)131			.try_into()132			.map_err(|_| "key too long")?;133134		let nesting_budget = self135			.recorder136			.weight_calls_budget(<StructureWeight<T>>::find_parent());137138		<Pallet<T>>::delete_token_property(self, &caller, TokenId(token_id), key, &nesting_budget)139			.map_err(dispatch_to_evm::<T>)140	}141142	/// @notice Get token property value.143	/// @dev Throws error if key not found144	/// @param tokenId ID of the token.145	/// @param key Property key.146	/// @return Property value bytes147	fn property(&self, token_id: uint256, key: string) -> Result<bytes> {148		let token_id: u32 = token_id.try_into().map_err(|_| "token id overflow")?;149		let key = <Vec<u8>>::from(key)150			.try_into()151			.map_err(|_| "key too long")?;152153		let props = <TokenProperties<T>>::get((self.id, token_id));154		let prop = props.get(&key).ok_or("key not found")?;155156		Ok(prop.to_vec())157	}158}159160#[derive(ToLog)]161pub enum ERC721Events {162	/// @dev This event emits when NFTs are created (`from` == 0) and destroyed163	///  (`to` == 0). Exception: during contract creation, any number of RFTs164	///  may be created and assigned without emitting Transfer.165	Transfer {166		#[indexed]167		from: address,168		#[indexed]169		to: address,170		#[indexed]171		token_id: uint256,172	},173	/// @dev Not supported174	Approval {175		#[indexed]176		owner: address,177		#[indexed]178		approved: address,179		#[indexed]180		token_id: uint256,181	},182	/// @dev Not supported183	#[allow(dead_code)]184	ApprovalForAll {185		#[indexed]186		owner: address,187		#[indexed]188		operator: address,189		approved: bool,190	},191}192193#[derive(ToLog)]194pub enum ERC721MintableEvents {195	/// @dev Not supported196	#[allow(dead_code)]197	MintingFinished {},198}199200#[solidity_interface(name = "ERC721Metadata")]201impl<T: Config> RefungibleHandle<T> {202	/// @notice A descriptive name for a collection of RFTs in this contract203	fn name(&self) -> Result<string> {204		Ok(decode_utf16(self.name.iter().copied())205			.map(|r| r.unwrap_or(REPLACEMENT_CHARACTER))206			.collect::<string>())207	}208209	/// @notice An abbreviated name for RFTs in this contract210	fn symbol(&self) -> Result<string> {211		Ok(string::from_utf8_lossy(&self.token_prefix).into())212	}213214	/// @notice A distinct Uniform Resource Identifier (URI) for a given asset.215	///216	/// @dev If the token has a `url` property and it is not empty, it is returned.217	///  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`.218	///  If the collection property `baseURI` is empty or absent, return "" (empty string)219	///  otherwise, if token property `suffix` present and is non-empty, return concatenation of baseURI and suffix220	///  otherwise, return concatenation of `baseURI` and stringified token id (decimal stringifying, without paddings).221	///222	/// @return token's const_metadata223	#[solidity(rename_selector = "tokenURI")]224	fn token_uri(&self, token_id: uint256) -> Result<string> {225		let token_id_u32: u32 = token_id.try_into().map_err(|_| "token id overflow")?;226227		if let Ok(url) = get_token_property(self, token_id_u32, &key::url()) {228			if !url.is_empty() {229				return Ok(url);230			}231		} else if !is_erc721_metadata_compatible::<T>(self.id) {232			return Err("tokenURI not set".into());233		}234235		if let Some(base_uri) =236			pallet_common::Pallet::<T>::get_collection_property(self.id, &key::base_uri())237		{238			if !base_uri.is_empty() {239				let base_uri = string::from_utf8(base_uri.into_inner()).map_err(|e| {240					Error::Revert(alloc::format!(241						"Can not convert value \"baseURI\" to string with error \"{}\"",242						e243					))244				})?;245				if let Ok(suffix) = get_token_property(self, token_id_u32, &key::suffix()) {246					if !suffix.is_empty() {247						return Ok(base_uri + suffix.as_str());248					}249				}250251				return Ok(base_uri + token_id.to_string().as_str());252			}253		}254255		Ok("".into())256	}257}258259/// @title ERC-721 Non-Fungible Token Standard, optional enumeration extension260/// @dev See https://eips.ethereum.org/EIPS/eip-721261#[solidity_interface(name = "ERC721Enumerable")]262impl<T: Config> RefungibleHandle<T> {263	/// @notice Enumerate valid RFTs264	/// @param index A counter less than `totalSupply()`265	/// @return The token identifier for the `index`th NFT,266	///  (sort order not specified)267	fn token_by_index(&self, index: uint256) -> Result<uint256> {268		Ok(index)269	}270271	/// Not implemented272	fn token_of_owner_by_index(&self, _owner: address, _index: uint256) -> Result<uint256> {273		// TODO: Not implemetable274		Err("not implemented".into())275	}276277	/// @notice Count RFTs tracked by this contract278	/// @return A count of valid RFTs tracked by this contract, where each one of279	///  them has an assigned and queryable owner not equal to the zero address280	fn total_supply(&self) -> Result<uint256> {281		self.consume_store_reads(1)?;282		Ok(<Pallet<T>>::total_supply(self).into())283	}284}285286/// @title ERC-721 Non-Fungible Token Standard287/// @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md288#[solidity_interface(name = "ERC721", events(ERC721Events))]289impl<T: Config> RefungibleHandle<T> {290	/// @notice Count all RFTs assigned to an owner291	/// @dev RFTs assigned to the zero address are considered invalid, and this292	///  function throws for queries about the zero address.293	/// @param owner An address for whom to query the balance294	/// @return The number of RFTs owned by `owner`, possibly zero295	fn balance_of(&self, owner: address) -> Result<uint256> {296		self.consume_store_reads(1)?;297		let owner = T::CrossAccountId::from_eth(owner);298		let balance = <AccountBalance<T>>::get((self.id, owner));299		Ok(balance.into())300	}301302	/// @notice Find the owner of an RFT303	/// @dev RFTs assigned to zero address are considered invalid, and queries304	///  about them do throw.305	///  Returns special 0xffffffffffffffffffffffffffffffffffffffff address for306	///  the tokens that are partially owned.307	/// @param tokenId The identifier for an RFT308	/// @return The address of the owner of the RFT309	fn owner_of(&self, token_id: uint256) -> Result<address> {310		self.consume_store_reads(2)?;311		let token = token_id.try_into()?;312		let owner = <Pallet<T>>::token_owner(self.id, token);313		Ok(owner314			.map(|address| *address.as_eth())315			.unwrap_or_else(|| ADDRESS_FOR_PARTIALLY_OWNED_TOKENS))316	}317318	/// @dev Not implemented319	fn safe_transfer_from_with_data(320		&mut self,321		_from: address,322		_to: address,323		_token_id: uint256,324		_data: bytes,325		_value: value,326	) -> Result<void> {327		// TODO: Not implemetable328		Err("not implemented".into())329	}330331	/// @dev Not implemented332	fn safe_transfer_from(333		&mut self,334		_from: address,335		_to: address,336		_token_id: uint256,337		_value: value,338	) -> Result<void> {339		// TODO: Not implemetable340		Err("not implemented".into())341	}342343	/// @notice Transfer ownership of an RFT -- THE CALLER IS RESPONSIBLE344	///  TO CONFIRM THAT `to` IS CAPABLE OF RECEIVING NFTS OR ELSE345	///  THEY MAY BE PERMANENTLY LOST346	/// @dev Throws unless `msg.sender` is the current owner or an authorized347	///  operator for this RFT. Throws if `from` is not the current owner. Throws348	///  if `to` is the zero address. Throws if `tokenId` is not a valid RFT.349	///  Throws if RFT pieces have multiple owners.350	/// @param from The current owner of the NFT351	/// @param to The new owner352	/// @param tokenId The NFT to transfer353	/// @param _value Not used for an NFT354	#[weight(<SelfWeightOf<T>>::transfer_from_creating_removing())]355	fn transfer_from(356		&mut self,357		caller: caller,358		from: address,359		to: address,360		token_id: uint256,361		_value: value,362	) -> Result<void> {363		let caller = T::CrossAccountId::from_eth(caller);364		let from = T::CrossAccountId::from_eth(from);365		let to = T::CrossAccountId::from_eth(to);366		let token = token_id.try_into()?;367		let budget = self368			.recorder369			.weight_calls_budget(<StructureWeight<T>>::find_parent());370371		let balance = balance(&self, token, &from)?;372		ensure_single_owner(&self, token, balance)?;373374		<Pallet<T>>::transfer_from(self, &caller, &from, &to, token, balance, &budget)375			.map_err(dispatch_to_evm::<T>)?;376377		Ok(())378	}379380	/// @dev Not implemented381	fn approve(382		&mut self,383		_caller: caller,384		_approved: address,385		_token_id: uint256,386		_value: value,387	) -> Result<void> {388		Err("not implemented".into())389	}390391	/// @dev Not implemented392	fn set_approval_for_all(393		&mut self,394		_caller: caller,395		_operator: address,396		_approved: bool,397	) -> Result<void> {398		// TODO: Not implemetable399		Err("not implemented".into())400	}401402	/// @dev Not implemented403	fn get_approved(&self, _token_id: uint256) -> Result<address> {404		// TODO: Not implemetable405		Err("not implemented".into())406	}407408	/// @dev Not implemented409	fn is_approved_for_all(&self, _owner: address, _operator: address) -> Result<address> {410		// TODO: Not implemetable411		Err("not implemented".into())412	}413}414415/// Returns amount of pieces of `token` that `owner` have416pub fn balance<T: Config>(417	collection: &RefungibleHandle<T>,418	token: TokenId,419	owner: &T::CrossAccountId,420) -> Result<u128> {421	collection.consume_store_reads(1)?;422	let balance = <Balance<T>>::get((collection.id, token, &owner));423	Ok(balance)424}425426/// Throws if `owner_balance` is lower than total amount of `token` pieces427pub fn ensure_single_owner<T: Config>(428	collection: &RefungibleHandle<T>,429	token: TokenId,430	owner_balance: u128,431) -> Result<()> {432	collection.consume_store_reads(1)?;433	let total_supply = <TotalSupply<T>>::get((collection.id, token));434	if total_supply != owner_balance {435		return Err("token has multiple owners".into());436	}437	Ok(())438}439440/// @title ERC721 Token that can be irreversibly burned (destroyed).441#[solidity_interface(name = "ERC721Burnable")]442impl<T: Config> RefungibleHandle<T> {443	/// @notice Burns a specific ERC721 token.444	/// @dev Throws unless `msg.sender` is the current RFT owner, or an authorized445	///  operator of the current owner.446	/// @param tokenId The RFT to approve447	#[weight(<SelfWeightOf<T>>::burn_item_fully())]448	fn burn(&mut self, caller: caller, token_id: uint256) -> Result<void> {449		let caller = T::CrossAccountId::from_eth(caller);450		let token = token_id.try_into()?;451452		let balance = balance(&self, token, &caller)?;453		ensure_single_owner(&self, token, balance)?;454455		<Pallet<T>>::burn(self, &caller, token, balance).map_err(dispatch_to_evm::<T>)?;456		Ok(())457	}458}459460/// @title ERC721 minting logic.461#[solidity_interface(name = "ERC721Mintable", events(ERC721MintableEvents))]462impl<T: Config> RefungibleHandle<T> {463	fn minting_finished(&self) -> Result<bool> {464		Ok(false)465	}466467	/// @notice Function to mint token.468	/// @dev `tokenId` should be obtained with `nextTokenId` method,469	///  unlike standard, you can't specify it manually470	/// @param to The new owner471	/// @param tokenId ID of the minted RFT472	#[weight(<SelfWeightOf<T>>::create_item())]473	fn mint(&mut self, caller: caller, to: address, token_id: uint256) -> Result<bool> {474		let caller = T::CrossAccountId::from_eth(caller);475		let to = T::CrossAccountId::from_eth(to);476		let token_id: u32 = token_id.try_into()?;477		let budget = self478			.recorder479			.weight_calls_budget(<StructureWeight<T>>::find_parent());480481		if <TokensMinted<T>>::get(self.id)482			.checked_add(1)483			.ok_or("item id overflow")?484			!= token_id485		{486			return Err("item id should be next".into());487		}488489		let users = [(to.clone(), 1)]490			.into_iter()491			.collect::<BTreeMap<_, _>>()492			.try_into()493			.unwrap();494		<Pallet<T>>::create_item(495			self,496			&caller,497			CreateItemData::<T::CrossAccountId> {498				users,499				properties: CollectionPropertiesVec::default(),500			},501			&budget,502		)503		.map_err(dispatch_to_evm::<T>)?;504505		Ok(true)506	}507508	/// @notice Function to mint token with the given tokenUri.509	/// @dev `tokenId` should be obtained with `nextTokenId` method,510	///  unlike standard, you can't specify it manually511	/// @param to The new owner512	/// @param tokenId ID of the minted RFT513	/// @param tokenUri Token URI that would be stored in the RFT properties514	#[solidity(rename_selector = "mintWithTokenURI")]515	#[weight(<SelfWeightOf<T>>::create_item())]516	fn mint_with_token_uri(517		&mut self,518		caller: caller,519		to: address,520		token_id: uint256,521		token_uri: string,522	) -> Result<bool> {523		let key = key::url();524		let permission = get_token_permission::<T>(self.id, &key)?;525		if !permission.collection_admin {526			return Err("Operation is not allowed".into());527		}528529		let caller = T::CrossAccountId::from_eth(caller);530		let to = T::CrossAccountId::from_eth(to);531		let token_id: u32 = token_id.try_into().map_err(|_| "amount overflow")?;532		let budget = self533			.recorder534			.weight_calls_budget(<StructureWeight<T>>::find_parent());535536		if <TokensMinted<T>>::get(self.id)537			.checked_add(1)538			.ok_or("item id overflow")?539			!= token_id540		{541			return Err("item id should be next".into());542		}543544		let mut properties = CollectionPropertiesVec::default();545		properties546			.try_push(Property {547				key,548				value: token_uri549					.into_bytes()550					.try_into()551					.map_err(|_| "token uri is too long")?,552			})553			.map_err(|e| Error::Revert(alloc::format!("Can't add property: {:?}", e)))?;554555		let users = [(to.clone(), 1)]556			.into_iter()557			.collect::<BTreeMap<_, _>>()558			.try_into()559			.unwrap();560		<Pallet<T>>::create_item(561			self,562			&caller,563			CreateItemData::<T::CrossAccountId> { users, properties },564			&budget,565		)566		.map_err(dispatch_to_evm::<T>)?;567		Ok(true)568	}569570	/// @dev Not implemented571	fn finish_minting(&mut self, _caller: caller) -> Result<bool> {572		Err("not implementable".into())573	}574}575576fn get_token_property<T: Config>(577	collection: &CollectionHandle<T>,578	token_id: u32,579	key: &up_data_structs::PropertyKey,580) -> Result<string> {581	collection.consume_store_reads(1)?;582	let properties = <TokenProperties<T>>::try_get((collection.id, token_id))583		.map_err(|_| Error::Revert("Token properties not found".into()))?;584	if let Some(property) = properties.get(key) {585		return Ok(string::from_utf8_lossy(property).into());586	}587588	Err("Property tokenURI not found".into())589}590591fn is_erc721_metadata_compatible<T: Config>(collection_id: CollectionId) -> bool {592	if let Some(shema_name) =593		pallet_common::Pallet::<T>::get_collection_property(collection_id, &key::schema_name())594	{595		let shema_name = shema_name.into_inner();596		shema_name == property_value::ERC721_METADATA597	} else {598		false599	}600}601602fn get_token_permission<T: Config>(603	collection_id: CollectionId,604	key: &PropertyKey,605) -> Result<PropertyPermission> {606	let token_property_permissions = CollectionPropertyPermissions::<T>::try_get(collection_id)607		.map_err(|_| Error::Revert("No permissions for collection".into()))?;608	let a = token_property_permissions609		.get(key)610		.map(Clone::clone)611		.ok_or_else(|| {612			let key = string::from_utf8(key.clone().into_inner()).unwrap_or_default();613			Error::Revert(alloc::format!("No permission for key {}", key))614		})?;615	Ok(a)616}617618/// @title Unique extensions for ERC721.619#[solidity_interface(name = "ERC721UniqueExtensions")]620impl<T: Config> RefungibleHandle<T> {621	/// @notice Transfer ownership of an RFT622	/// @dev Throws unless `msg.sender` is the current owner. Throws if `to`623	///  is the zero address. Throws if `tokenId` is not a valid RFT.624	///  Throws if RFT pieces have multiple owners.625	/// @param to The new owner626	/// @param tokenId The RFT to transfer627	/// @param _value Not used for an RFT628	#[weight(<SelfWeightOf<T>>::transfer_creating_removing())]629	fn transfer(630		&mut self,631		caller: caller,632		to: address,633		token_id: uint256,634		_value: value,635	) -> Result<void> {636		let caller = T::CrossAccountId::from_eth(caller);637		let to = T::CrossAccountId::from_eth(to);638		let token = token_id.try_into()?;639		let budget = self640			.recorder641			.weight_calls_budget(<StructureWeight<T>>::find_parent());642643		let balance = balance(&self, token, &caller)?;644		ensure_single_owner(&self, token, balance)?;645646		<Pallet<T>>::transfer(self, &caller, &to, token, balance, &budget)647			.map_err(dispatch_to_evm::<T>)?;648		Ok(())649	}650651	/// @notice Burns a specific ERC721 token.652	/// @dev Throws unless `msg.sender` is the current owner or an authorized653	///  operator for this RFT. Throws if `from` is not the current owner. Throws654	///  if `to` is the zero address. Throws if `tokenId` is not a valid RFT.655	///  Throws if RFT pieces have multiple owners.656	/// @param from The current owner of the RFT657	/// @param tokenId The RFT to transfer658	/// @param _value Not used for an RFT659	#[weight(<SelfWeightOf<T>>::burn_from())]660	fn burn_from(661		&mut self,662		caller: caller,663		from: address,664		token_id: uint256,665		_value: value,666	) -> Result<void> {667		let caller = T::CrossAccountId::from_eth(caller);668		let from = T::CrossAccountId::from_eth(from);669		let token = token_id.try_into()?;670		let budget = self671			.recorder672			.weight_calls_budget(<StructureWeight<T>>::find_parent());673674		let balance = balance(&self, token, &caller)?;675		ensure_single_owner(&self, token, balance)?;676677		<Pallet<T>>::burn_from(self, &caller, &from, token, balance, &budget)678			.map_err(dispatch_to_evm::<T>)?;679		Ok(())680	}681682	/// @notice Returns next free RFT ID.683	fn next_token_id(&self) -> Result<uint256> {684		self.consume_store_reads(1)?;685		Ok(<TokensMinted<T>>::get(self.id)686			.checked_add(1)687			.ok_or("item id overflow")?688			.into())689	}690691	/// @notice Function to mint multiple tokens.692	/// @dev `tokenIds` should be an array of consecutive numbers and first number693	///  should be obtained with `nextTokenId` method694	/// @param to The new owner695	/// @param tokenIds IDs of the minted RFTs696	#[weight(<SelfWeightOf<T>>::create_multiple_items(token_ids.len() as u32))]697	fn mint_bulk(&mut self, caller: caller, to: address, token_ids: Vec<uint256>) -> Result<bool> {698		let caller = T::CrossAccountId::from_eth(caller);699		let to = T::CrossAccountId::from_eth(to);700		let mut expected_index = <TokensMinted<T>>::get(self.id)701			.checked_add(1)702			.ok_or("item id overflow")?;703		let budget = self704			.recorder705			.weight_calls_budget(<StructureWeight<T>>::find_parent());706707		let total_tokens = token_ids.len();708		for id in token_ids.into_iter() {709			let id: u32 = id.try_into().map_err(|_| "token id overflow")?;710			if id != expected_index {711				return Err("item id should be next".into());712			}713			expected_index = expected_index.checked_add(1).ok_or("item id overflow")?;714		}715		let users = [(to.clone(), 1)]716			.into_iter()717			.collect::<BTreeMap<_, _>>()718			.try_into()719			.unwrap();720		let create_item_data = CreateItemData::<T::CrossAccountId> {721			users,722			properties: CollectionPropertiesVec::default(),723		};724		let data = (0..total_tokens)725			.map(|_| create_item_data.clone())726			.collect();727728		<Pallet<T>>::create_multiple_items(self, &caller, data, &budget)729			.map_err(dispatch_to_evm::<T>)?;730		Ok(true)731	}732733	/// @notice Function to mint multiple tokens with the given tokenUris.734	/// @dev `tokenIds` is array of pairs of token ID and token URI. Token IDs should be consecutive735	///  numbers and first number should be obtained with `nextTokenId` method736	/// @param to The new owner737	/// @param tokens array of pairs of token ID and token URI for minted tokens738	#[solidity(rename_selector = "mintBulkWithTokenURI")]739	#[weight(<SelfWeightOf<T>>::create_multiple_items(tokens.len() as u32))]740	fn mint_bulk_with_token_uri(741		&mut self,742		caller: caller,743		to: address,744		tokens: Vec<(uint256, string)>,745	) -> Result<bool> {746		let key = key::url();747		let caller = T::CrossAccountId::from_eth(caller);748		let to = T::CrossAccountId::from_eth(to);749		let mut expected_index = <TokensMinted<T>>::get(self.id)750			.checked_add(1)751			.ok_or("item id overflow")?;752		let budget = self753			.recorder754			.weight_calls_budget(<StructureWeight<T>>::find_parent());755756		let mut data = Vec::with_capacity(tokens.len());757		let users: BoundedBTreeMap<_, _, _> = [(to.clone(), 1)]758			.into_iter()759			.collect::<BTreeMap<_, _>>()760			.try_into()761			.unwrap();762		for (id, token_uri) in tokens {763			let id: u32 = id.try_into().map_err(|_| "token id overflow")?;764			if id != expected_index {765				return Err("item id should be next".into());766			}767			expected_index = expected_index.checked_add(1).ok_or("item id overflow")?;768769			let mut properties = CollectionPropertiesVec::default();770			properties771				.try_push(Property {772					key: key.clone(),773					value: token_uri774						.into_bytes()775						.try_into()776						.map_err(|_| "token uri is too long")?,777				})778				.map_err(|e| Error::Revert(alloc::format!("Can't add property: {:?}", e)))?;779780			let create_item_data = CreateItemData::<T::CrossAccountId> {781				users: users.clone(),782				properties,783			};784			data.push(create_item_data);785		}786787		<Pallet<T>>::create_multiple_items(self, &caller, data, &budget)788			.map_err(dispatch_to_evm::<T>)?;789		Ok(true)790	}791792	/// Returns EVM address for refungible token793	///794	/// @param token ID of the token795	fn token_contract_address(&self, token: uint256) -> Result<address> {796		Ok(T::EvmTokenAddressMapping::token_to_address(797			self.id,798			token.try_into().map_err(|_| "token id overflow")?,799		))800	}801}802803#[solidity_interface(804	name = "UniqueRefungible",805	is(806		ERC721,807		ERC721Metadata,808		ERC721Enumerable,809		ERC721UniqueExtensions,810		ERC721Mintable,811		ERC721Burnable,812		via("CollectionHandle<T>", common_mut, Collection),813		TokenProperties,814	)815)]816impl<T: Config> RefungibleHandle<T> where T::AccountId: From<[u8; 32]> {}817818// Not a tests, but code generators819generate_stubgen!(gen_impl, UniqueRefungibleCall<()>, true);820generate_stubgen!(gen_iface, UniqueRefungibleCall<()>, false);821822impl<T: Config> CommonEvmHandler for RefungibleHandle<T>823where824	T::AccountId: From<[u8; 32]>,825{826	const CODE: &'static [u8] = include_bytes!("./stubs/UniqueRefungible.raw");827	fn call(828		self,829		handle: &mut impl PrecompileHandle,830	) -> Option<pallet_common::erc::PrecompileResult> {831		call::<T, UniqueRefungibleCall<T>, _, _>(handle, self)832	}833}