git.delta.rocks / unique-network / refs/commits / c0ab2ae2da4d

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 isMutable Permission to mutate property.62	/// @param collectionAdmin Permission to mutate property by collection admin if property is mutable.63	/// @param tokenOwner 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	) -> Result<void> {326		// TODO: Not implemetable327		Err("not implemented".into())328	}329330	/// @dev Not implemented331	fn safe_transfer_from(332		&mut self,333		_from: address,334		_to: address,335		_token_id: uint256,336	) -> Result<void> {337		// TODO: Not implemetable338		Err("not implemented".into())339	}340341	/// @notice Transfer ownership of an RFT -- THE CALLER IS RESPONSIBLE342	///  TO CONFIRM THAT `to` IS CAPABLE OF RECEIVING NFTS OR ELSE343	///  THEY MAY BE PERMANENTLY LOST344	/// @dev Throws unless `msg.sender` is the current owner or an authorized345	///  operator for this RFT. Throws if `from` is not the current owner. Throws346	///  if `to` is the zero address. Throws if `tokenId` is not a valid RFT.347	///  Throws if RFT pieces have multiple owners.348	/// @param from The current owner of the NFT349	/// @param to The new owner350	/// @param tokenId The NFT to transfer351	#[weight(<SelfWeightOf<T>>::transfer_from_creating_removing())]352	fn transfer_from(353		&mut self,354		caller: caller,355		from: address,356		to: address,357		token_id: uint256,358	) -> Result<void> {359		let caller = T::CrossAccountId::from_eth(caller);360		let from = T::CrossAccountId::from_eth(from);361		let to = T::CrossAccountId::from_eth(to);362		let token = token_id.try_into()?;363		let budget = self364			.recorder365			.weight_calls_budget(<StructureWeight<T>>::find_parent());366367		let balance = balance(&self, token, &from)?;368		ensure_single_owner(&self, token, balance)?;369370		<Pallet<T>>::transfer_from(self, &caller, &from, &to, token, balance, &budget)371			.map_err(dispatch_to_evm::<T>)?;372373		Ok(())374	}375376	/// @dev Not implemented377	fn approve(&mut self, _caller: caller, _approved: address, _token_id: uint256) -> Result<void> {378		Err("not implemented".into())379	}380381	/// @dev Not implemented382	fn set_approval_for_all(383		&mut self,384		_caller: caller,385		_operator: address,386		_approved: bool,387	) -> Result<void> {388		// TODO: Not implemetable389		Err("not implemented".into())390	}391392	/// @dev Not implemented393	fn get_approved(&self, _token_id: uint256) -> Result<address> {394		// TODO: Not implemetable395		Err("not implemented".into())396	}397398	/// @dev Not implemented399	fn is_approved_for_all(&self, _owner: address, _operator: address) -> Result<address> {400		// TODO: Not implemetable401		Err("not implemented".into())402	}403}404405/// Returns amount of pieces of `token` that `owner` have406pub fn balance<T: Config>(407	collection: &RefungibleHandle<T>,408	token: TokenId,409	owner: &T::CrossAccountId,410) -> Result<u128> {411	collection.consume_store_reads(1)?;412	let balance = <Balance<T>>::get((collection.id, token, &owner));413	Ok(balance)414}415416/// Throws if `owner_balance` is lower than total amount of `token` pieces417pub fn ensure_single_owner<T: Config>(418	collection: &RefungibleHandle<T>,419	token: TokenId,420	owner_balance: u128,421) -> Result<()> {422	collection.consume_store_reads(1)?;423	let total_supply = <TotalSupply<T>>::get((collection.id, token));424	if total_supply != owner_balance {425		return Err("token has multiple owners".into());426	}427	Ok(())428}429430/// @title ERC721 Token that can be irreversibly burned (destroyed).431#[solidity_interface(name = ERC721Burnable)]432impl<T: Config> RefungibleHandle<T> {433	/// @notice Burns a specific ERC721 token.434	/// @dev Throws unless `msg.sender` is the current RFT owner, or an authorized435	///  operator of the current owner.436	/// @param tokenId The RFT to approve437	#[weight(<SelfWeightOf<T>>::burn_item_fully())]438	fn burn(&mut self, caller: caller, token_id: uint256) -> Result<void> {439		let caller = T::CrossAccountId::from_eth(caller);440		let token = token_id.try_into()?;441442		let balance = balance(&self, token, &caller)?;443		ensure_single_owner(&self, token, balance)?;444445		<Pallet<T>>::burn(self, &caller, token, balance).map_err(dispatch_to_evm::<T>)?;446		Ok(())447	}448}449450/// @title ERC721 minting logic.451#[solidity_interface(name = ERC721Mintable, events(ERC721MintableEvents))]452impl<T: Config> RefungibleHandle<T> {453	fn minting_finished(&self) -> Result<bool> {454		Ok(false)455	}456457	/// @notice Function to mint token.458	/// @dev `tokenId` should be obtained with `nextTokenId` method,459	///  unlike standard, you can't specify it manually460	/// @param to The new owner461	/// @param tokenId ID of the minted RFT462	#[weight(<SelfWeightOf<T>>::create_item())]463	fn mint(&mut self, caller: caller, to: address, token_id: uint256) -> Result<bool> {464		let caller = T::CrossAccountId::from_eth(caller);465		let to = T::CrossAccountId::from_eth(to);466		let token_id: u32 = token_id.try_into()?;467		let budget = self468			.recorder469			.weight_calls_budget(<StructureWeight<T>>::find_parent());470471		if <TokensMinted<T>>::get(self.id)472			.checked_add(1)473			.ok_or("item id overflow")?474			!= token_id475		{476			return Err("item id should be next".into());477		}478479		let users = [(to.clone(), 1)]480			.into_iter()481			.collect::<BTreeMap<_, _>>()482			.try_into()483			.unwrap();484		<Pallet<T>>::create_item(485			self,486			&caller,487			CreateItemData::<T::CrossAccountId> {488				users,489				properties: CollectionPropertiesVec::default(),490			},491			&budget,492		)493		.map_err(dispatch_to_evm::<T>)?;494495		Ok(true)496	}497498	/// @notice Function to mint token with the given tokenUri.499	/// @dev `tokenId` should be obtained with `nextTokenId` method,500	///  unlike standard, you can't specify it manually501	/// @param to The new owner502	/// @param tokenId ID of the minted RFT503	/// @param tokenUri Token URI that would be stored in the RFT properties504	#[solidity(rename_selector = "mintWithTokenURI")]505	#[weight(<SelfWeightOf<T>>::create_item())]506	fn mint_with_token_uri(507		&mut self,508		caller: caller,509		to: address,510		token_id: uint256,511		token_uri: string,512	) -> Result<bool> {513		let key = key::url();514		let permission = get_token_permission::<T>(self.id, &key)?;515		if !permission.collection_admin {516			return Err("Operation is not allowed".into());517		}518519		let caller = T::CrossAccountId::from_eth(caller);520		let to = T::CrossAccountId::from_eth(to);521		let token_id: u32 = token_id.try_into().map_err(|_| "amount overflow")?;522		let budget = self523			.recorder524			.weight_calls_budget(<StructureWeight<T>>::find_parent());525526		if <TokensMinted<T>>::get(self.id)527			.checked_add(1)528			.ok_or("item id overflow")?529			!= token_id530		{531			return Err("item id should be next".into());532		}533534		let mut properties = CollectionPropertiesVec::default();535		properties536			.try_push(Property {537				key,538				value: token_uri539					.into_bytes()540					.try_into()541					.map_err(|_| "token uri is too long")?,542			})543			.map_err(|e| Error::Revert(alloc::format!("Can't add property: {:?}", e)))?;544545		let users = [(to.clone(), 1)]546			.into_iter()547			.collect::<BTreeMap<_, _>>()548			.try_into()549			.unwrap();550		<Pallet<T>>::create_item(551			self,552			&caller,553			CreateItemData::<T::CrossAccountId> { users, properties },554			&budget,555		)556		.map_err(dispatch_to_evm::<T>)?;557		Ok(true)558	}559560	/// @dev Not implemented561	fn finish_minting(&mut self, _caller: caller) -> Result<bool> {562		Err("not implementable".into())563	}564}565566fn get_token_property<T: Config>(567	collection: &CollectionHandle<T>,568	token_id: u32,569	key: &up_data_structs::PropertyKey,570) -> Result<string> {571	collection.consume_store_reads(1)?;572	let properties = <TokenProperties<T>>::try_get((collection.id, token_id))573		.map_err(|_| Error::Revert("Token properties not found".into()))?;574	if let Some(property) = properties.get(key) {575		return Ok(string::from_utf8_lossy(property).into());576	}577578	Err("Property tokenURI not found".into())579}580581fn is_erc721_metadata_compatible<T: Config>(collection_id: CollectionId) -> bool {582	if let Some(shema_name) =583		pallet_common::Pallet::<T>::get_collection_property(collection_id, &key::schema_name())584	{585		let shema_name = shema_name.into_inner();586		shema_name == property_value::ERC721_METADATA587	} else {588		false589	}590}591592fn get_token_permission<T: Config>(593	collection_id: CollectionId,594	key: &PropertyKey,595) -> Result<PropertyPermission> {596	let token_property_permissions = CollectionPropertyPermissions::<T>::try_get(collection_id)597		.map_err(|_| Error::Revert("No permissions for collection".into()))?;598	let a = token_property_permissions599		.get(key)600		.map(Clone::clone)601		.ok_or_else(|| {602			let key = string::from_utf8(key.clone().into_inner()).unwrap_or_default();603			Error::Revert(alloc::format!("No permission for key {}", key))604		})?;605	Ok(a)606}607608/// @title Unique extensions for ERC721.609#[solidity_interface(name = ERC721UniqueExtensions)]610impl<T: Config> RefungibleHandle<T> {611	/// @notice Transfer ownership of an RFT612	/// @dev Throws unless `msg.sender` is the current owner. Throws if `to`613	///  is the zero address. Throws if `tokenId` is not a valid RFT.614	///  Throws if RFT pieces have multiple owners.615	/// @param to The new owner616	/// @param tokenId The RFT to transfer617	#[weight(<SelfWeightOf<T>>::transfer_creating_removing())]618	fn transfer(&mut self, caller: caller, to: address, token_id: uint256) -> Result<void> {619		let caller = T::CrossAccountId::from_eth(caller);620		let to = T::CrossAccountId::from_eth(to);621		let token = token_id.try_into()?;622		let budget = self623			.recorder624			.weight_calls_budget(<StructureWeight<T>>::find_parent());625626		let balance = balance(&self, token, &caller)?;627		ensure_single_owner(&self, token, balance)?;628629		<Pallet<T>>::transfer(self, &caller, &to, token, balance, &budget)630			.map_err(dispatch_to_evm::<T>)?;631		Ok(())632	}633634	/// @notice Burns a specific ERC721 token.635	/// @dev Throws unless `msg.sender` is the current owner or an authorized636	///  operator for this RFT. Throws if `from` is not the current owner. Throws637	///  if `to` is the zero address. Throws if `tokenId` is not a valid RFT.638	///  Throws if RFT pieces have multiple owners.639	/// @param from The current owner of the RFT640	/// @param tokenId The RFT to transfer641	#[weight(<SelfWeightOf<T>>::burn_from())]642	fn burn_from(&mut self, caller: caller, from: address, token_id: uint256) -> Result<void> {643		let caller = T::CrossAccountId::from_eth(caller);644		let from = T::CrossAccountId::from_eth(from);645		let token = token_id.try_into()?;646		let budget = self647			.recorder648			.weight_calls_budget(<StructureWeight<T>>::find_parent());649650		let balance = balance(&self, token, &caller)?;651		ensure_single_owner(&self, token, balance)?;652653		<Pallet<T>>::burn_from(self, &caller, &from, token, balance, &budget)654			.map_err(dispatch_to_evm::<T>)?;655		Ok(())656	}657658	/// @notice Returns next free RFT ID.659	fn next_token_id(&self) -> Result<uint256> {660		self.consume_store_reads(1)?;661		Ok(<TokensMinted<T>>::get(self.id)662			.checked_add(1)663			.ok_or("item id overflow")?664			.into())665	}666667	/// @notice Function to mint multiple tokens.668	/// @dev `tokenIds` should be an array of consecutive numbers and first number669	///  should be obtained with `nextTokenId` method670	/// @param to The new owner671	/// @param tokenIds IDs of the minted RFTs672	#[weight(<SelfWeightOf<T>>::create_multiple_items(token_ids.len() as u32))]673	fn mint_bulk(&mut self, caller: caller, to: address, token_ids: Vec<uint256>) -> Result<bool> {674		let caller = T::CrossAccountId::from_eth(caller);675		let to = T::CrossAccountId::from_eth(to);676		let mut expected_index = <TokensMinted<T>>::get(self.id)677			.checked_add(1)678			.ok_or("item id overflow")?;679		let budget = self680			.recorder681			.weight_calls_budget(<StructureWeight<T>>::find_parent());682683		let total_tokens = token_ids.len();684		for id in token_ids.into_iter() {685			let id: u32 = id.try_into().map_err(|_| "token id overflow")?;686			if id != expected_index {687				return Err("item id should be next".into());688			}689			expected_index = expected_index.checked_add(1).ok_or("item id overflow")?;690		}691		let users = [(to.clone(), 1)]692			.into_iter()693			.collect::<BTreeMap<_, _>>()694			.try_into()695			.unwrap();696		let create_item_data = CreateItemData::<T::CrossAccountId> {697			users,698			properties: CollectionPropertiesVec::default(),699		};700		let data = (0..total_tokens)701			.map(|_| create_item_data.clone())702			.collect();703704		<Pallet<T>>::create_multiple_items(self, &caller, data, &budget)705			.map_err(dispatch_to_evm::<T>)?;706		Ok(true)707	}708709	/// @notice Function to mint multiple tokens with the given tokenUris.710	/// @dev `tokenIds` is array of pairs of token ID and token URI. Token IDs should be consecutive711	///  numbers and first number should be obtained with `nextTokenId` method712	/// @param to The new owner713	/// @param tokens array of pairs of token ID and token URI for minted tokens714	#[solidity(rename_selector = "mintBulkWithTokenURI")]715	#[weight(<SelfWeightOf<T>>::create_multiple_items(tokens.len() as u32))]716	fn mint_bulk_with_token_uri(717		&mut self,718		caller: caller,719		to: address,720		tokens: Vec<(uint256, string)>,721	) -> Result<bool> {722		let key = key::url();723		let caller = T::CrossAccountId::from_eth(caller);724		let to = T::CrossAccountId::from_eth(to);725		let mut expected_index = <TokensMinted<T>>::get(self.id)726			.checked_add(1)727			.ok_or("item id overflow")?;728		let budget = self729			.recorder730			.weight_calls_budget(<StructureWeight<T>>::find_parent());731732		let mut data = Vec::with_capacity(tokens.len());733		let users: BoundedBTreeMap<_, _, _> = [(to.clone(), 1)]734			.into_iter()735			.collect::<BTreeMap<_, _>>()736			.try_into()737			.unwrap();738		for (id, token_uri) in tokens {739			let id: u32 = id.try_into().map_err(|_| "token id overflow")?;740			if id != expected_index {741				return Err("item id should be next".into());742			}743			expected_index = expected_index.checked_add(1).ok_or("item id overflow")?;744745			let mut properties = CollectionPropertiesVec::default();746			properties747				.try_push(Property {748					key: key.clone(),749					value: token_uri750						.into_bytes()751						.try_into()752						.map_err(|_| "token uri is too long")?,753				})754				.map_err(|e| Error::Revert(alloc::format!("Can't add property: {:?}", e)))?;755756			let create_item_data = CreateItemData::<T::CrossAccountId> {757				users: users.clone(),758				properties,759			};760			data.push(create_item_data);761		}762763		<Pallet<T>>::create_multiple_items(self, &caller, data, &budget)764			.map_err(dispatch_to_evm::<T>)?;765		Ok(true)766	}767768	/// Returns EVM address for refungible token769	///770	/// @param token ID of the token771	fn token_contract_address(&self, token: uint256) -> Result<address> {772		Ok(T::EvmTokenAddressMapping::token_to_address(773			self.id,774			token.try_into().map_err(|_| "token id overflow")?,775		))776	}777}778779#[solidity_interface(780	name = UniqueRefungible,781	is(782		ERC721,783		ERC721Metadata,784		ERC721Enumerable,785		ERC721UniqueExtensions,786		ERC721Mintable,787		ERC721Burnable,788		Collection(common_mut, CollectionHandle<T>),789		TokenProperties,790	)791)]792impl<T: Config> RefungibleHandle<T> where T::AccountId: From<[u8; 32]> {}793794// Not a tests, but code generators795generate_stubgen!(gen_impl, UniqueRefungibleCall<()>, true);796generate_stubgen!(gen_iface, UniqueRefungibleCall<()>, false);797798impl<T: Config> CommonEvmHandler for RefungibleHandle<T>799where800	T::AccountId: From<[u8; 32]>,801{802	const CODE: &'static [u8] = include_bytes!("./stubs/UniqueRefungible.raw");803	fn call(804		self,805		handle: &mut impl PrecompileHandle,806	) -> Option<pallet_common::erc::PrecompileResult> {807		call::<T, UniqueRefungibleCall<T>, _, _>(handle, self)808	}809}