git.delta.rocks / unique-network / refs/commits / 503c92cd6363

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::{ToLog, execution::*, generate_stubgen, solidity, solidity_interface, types::*, weight};29use frame_support::{BoundedBTreeMap, BoundedVec};30use pallet_common::{31	CollectionHandle, CollectionPropertyPermissions,32	erc::{CommonEvmHandler, CollectionCall, static_property::key, static_property::value},33};34use pallet_evm::{account::CrossAccountId, PrecompileHandle};35use pallet_evm_coder_substrate::{call, dispatch_to_evm};36use pallet_structure::{SelfWeightOf as StructureWeight, weights::WeightInfo as _};37use sp_core::H160;38use sp_std::{collections::btree_map::BTreeMap, vec::Vec, vec};39use up_data_structs::{40	CollectionId, CollectionPropertiesVec, mapping::TokenAddressMapping, Property, PropertyKey,41	PropertyKeyPermission, PropertyPermission, TokenId,42};4344use crate::{45	AccountBalance, Balance, Config, CreateItemData, Pallet, RefungibleHandle, SelfWeightOf,46	TokenProperties, TokensMinted, TotalSupply, weights::WeightInfo,47};4849pub const ADDRESS_FOR_PARTIALLY_OWNED_TOKENS: H160 = H160::repeat_byte(0xff);5051/// @title A contract that allows to set and delete token properties and change token property permissions.52#[solidity_interface(name = TokenProperties)]53impl<T: Config> RefungibleHandle<T> {54	/// @notice Set permissions for token property.55	/// @dev Throws error if `msg.sender` is not admin or owner of the collection.56	/// @param key Property key.57	/// @param isMutable Permission to mutate property.58	/// @param collectionAdmin Permission to mutate property by collection admin if property is mutable.59	/// @param tokenOwner Permission to mutate property by token owner if property is mutable.60	fn set_token_property_permission(61		&mut self,62		caller: caller,63		key: string,64		is_mutable: bool,65		collection_admin: bool,66		token_owner: bool,67	) -> Result<()> {68		let caller = T::CrossAccountId::from_eth(caller);69		<Pallet<T>>::set_token_property_permissions(70			self,71			&caller,72			vec![PropertyKeyPermission {73				key: <Vec<u8>>::from(key)74					.try_into()75					.map_err(|_| "too long key")?,76				permission: PropertyPermission {77					mutable: is_mutable,78					collection_admin,79					token_owner,80				},81			}],82		)83		.map_err(dispatch_to_evm::<T>)84	}8586	/// @notice Set token property value.87	/// @dev Throws error if `msg.sender` has no permission to edit the property.88	/// @param tokenId ID of the token.89	/// @param key Property key.90	/// @param value Property value.91	fn set_property(92		&mut self,93		caller: caller,94		token_id: uint256,95		key: string,96		value: bytes,97	) -> Result<()> {98		let caller = T::CrossAccountId::from_eth(caller);99		let token_id: u32 = token_id.try_into().map_err(|_| "token id overflow")?;100		let key = <Vec<u8>>::from(key)101			.try_into()102			.map_err(|_| "key too long")?;103		let value = value.try_into().map_err(|_| "value too long")?;104105		let nesting_budget = self106			.recorder107			.weight_calls_budget(<StructureWeight<T>>::find_parent());108109		<Pallet<T>>::set_token_property(110			self,111			&caller,112			TokenId(token_id),113			Property { key, value },114			&nesting_budget,115		)116		.map_err(dispatch_to_evm::<T>)117	}118119	/// @notice Delete token property value.120	/// @dev Throws error if `msg.sender` has no permission to edit the property.121	/// @param tokenId ID of the token.122	/// @param key Property key.123	fn delete_property(&mut self, token_id: uint256, caller: caller, key: string) -> Result<()> {124		let caller = T::CrossAccountId::from_eth(caller);125		let token_id: u32 = token_id.try_into().map_err(|_| "token id overflow")?;126		let key = <Vec<u8>>::from(key)127			.try_into()128			.map_err(|_| "key too long")?;129130		let nesting_budget = self131			.recorder132			.weight_calls_budget(<StructureWeight<T>>::find_parent());133134		<Pallet<T>>::delete_token_property(self, &caller, TokenId(token_id), key, &nesting_budget)135			.map_err(dispatch_to_evm::<T>)136	}137138	/// @notice Get token property value.139	/// @dev Throws error if key not found140	/// @param tokenId ID of the token.141	/// @param key Property key.142	/// @return Property value bytes143	fn property(&self, token_id: uint256, key: string) -> Result<bytes> {144		let token_id: u32 = token_id.try_into().map_err(|_| "token id overflow")?;145		let key = <Vec<u8>>::from(key)146			.try_into()147			.map_err(|_| "key too long")?;148149		let props = <TokenProperties<T>>::get((self.id, token_id));150		let prop = props.get(&key).ok_or("key not found")?;151152		Ok(prop.to_vec())153	}154}155156#[derive(ToLog)]157pub enum ERC721Events {158	/// @dev This event emits when NFTs are created (`from` == 0) and destroyed159	///  (`to` == 0). Exception: during contract creation, any number of RFTs160	///  may be created and assigned without emitting Transfer.161	Transfer {162		#[indexed]163		from: address,164		#[indexed]165		to: address,166		#[indexed]167		token_id: uint256,168	},169	/// @dev Not supported170	Approval {171		#[indexed]172		owner: address,173		#[indexed]174		approved: address,175		#[indexed]176		token_id: uint256,177	},178	/// @dev Not supported179	#[allow(dead_code)]180	ApprovalForAll {181		#[indexed]182		owner: address,183		#[indexed]184		operator: address,185		approved: bool,186	},187}188189#[derive(ToLog)]190pub enum ERC721UniqueMintableEvents {191	/// @dev Not supported192	#[allow(dead_code)]193	MintingFinished {},194}195196#[solidity_interface(name = ERC721Metadata)]197impl<T: Config> RefungibleHandle<T> {198	/// @notice A descriptive name for a collection of NFTs in this contract199	/// @dev real implementation of this function lies in `ERC721UniqueExtensions`200	#[solidity(hide, rename_selector = "name")]201	fn name_proxy(&self) -> Result<string> {202		self.name()203	}204205	/// @notice An abbreviated name for NFTs in this contract206	/// @dev real implementation of this function lies in `ERC721UniqueExtensions`207	#[solidity(hide, rename_selector = "symbol")]208	fn symbol_proxy(&self) -> Result<string> {209		self.symbol()210	}211212	/// @notice A distinct Uniform Resource Identifier (URI) for a given asset.213	///214	/// @dev If the token has a `url` property and it is not empty, it is returned.215	///  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`.216	///  If the collection property `baseURI` is empty or absent, return "" (empty string)217	///  otherwise, if token property `suffix` present and is non-empty, return concatenation of baseURI and suffix218	///  otherwise, return concatenation of `baseURI` and stringified token id (decimal stringifying, without paddings).219	///220	/// @return token's const_metadata221	#[solidity(rename_selector = "tokenURI")]222	fn token_uri(&self, token_id: uint256) -> Result<string> {223		let token_id_u32: u32 = token_id.try_into().map_err(|_| "token id overflow")?;224225		match get_token_property(self, token_id_u32, &key::url()).as_deref() {226			Err(_) | Ok("") => (),227			Ok(url) => {228				return Ok(url.into());229			}230		};231232		let base_uri =233			pallet_common::Pallet::<T>::get_collection_property(self.id, &key::base_uri())234				.map(BoundedVec::into_inner)235				.map(string::from_utf8)236				.transpose()237				.map_err(|e| {238					Error::Revert(alloc::format!(239						"Can not convert value \"baseURI\" to string with error \"{}\"",240						e241					))242				})?;243244		let base_uri = match base_uri.as_deref() {245			None | Some("") => {246				return Ok("".into());247			}248			Some(base_uri) => base_uri.into(),249		};250251		Ok(252			match get_token_property(self, token_id_u32, &key::suffix()).as_deref() {253				Err(_) | Ok("") => base_uri,254				Ok(suffix) => base_uri + suffix,255			},256		)257	}258}259260/// @title ERC-721 Non-Fungible Token Standard, optional enumeration extension261/// @dev See https://eips.ethereum.org/EIPS/eip-721262#[solidity_interface(name = ERC721Enumerable)]263impl<T: Config> RefungibleHandle<T> {264	/// @notice Enumerate valid RFTs265	/// @param index A counter less than `totalSupply()`266	/// @return The token identifier for the `index`th NFT,267	///  (sort order not specified)268	fn token_by_index(&self, index: uint256) -> Result<uint256> {269		Ok(index)270	}271272	/// Not implemented273	fn token_of_owner_by_index(&self, _owner: address, _index: uint256) -> Result<uint256> {274		// TODO: Not implemetable275		Err("not implemented".into())276	}277278	/// @notice Count RFTs tracked by this contract279	/// @return A count of valid RFTs tracked by this contract, where each one of280	///  them has an assigned and queryable owner not equal to the zero address281	fn total_supply(&self) -> Result<uint256> {282		self.consume_store_reads(1)?;283		Ok(<Pallet<T>>::total_supply(self).into())284	}285}286287/// @title ERC-721 Non-Fungible Token Standard288/// @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md289#[solidity_interface(name = ERC721, events(ERC721Events))]290impl<T: Config> RefungibleHandle<T> {291	/// @notice Count all RFTs assigned to an owner292	/// @dev RFTs assigned to the zero address are considered invalid, and this293	///  function throws for queries about the zero address.294	/// @param owner An address for whom to query the balance295	/// @return The number of RFTs owned by `owner`, possibly zero296	fn balance_of(&self, owner: address) -> Result<uint256> {297		self.consume_store_reads(1)?;298		let owner = T::CrossAccountId::from_eth(owner);299		let balance = <AccountBalance<T>>::get((self.id, owner));300		Ok(balance.into())301	}302303	/// @notice Find the owner of an RFT304	/// @dev RFTs assigned to zero address are considered invalid, and queries305	///  about them do throw.306	///  Returns special 0xffffffffffffffffffffffffffffffffffffffff address for307	///  the tokens that are partially owned.308	/// @param tokenId The identifier for an RFT309	/// @return The address of the owner of the RFT310	fn owner_of(&self, token_id: uint256) -> Result<address> {311		self.consume_store_reads(2)?;312		let token = token_id.try_into()?;313		let owner = <Pallet<T>>::token_owner(self.id, token);314		Ok(owner315			.map(|address| *address.as_eth())316			.unwrap_or_else(|| ADDRESS_FOR_PARTIALLY_OWNED_TOKENS))317	}318319	/// @dev Not implemented320	fn safe_transfer_from_with_data(321		&mut self,322		_from: address,323		_to: address,324		_token_id: uint256,325		_data: bytes,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	) -> Result<void> {338		// TODO: Not implemetable339		Err("not implemented".into())340	}341342	/// @notice Transfer ownership of an RFT -- THE CALLER IS RESPONSIBLE343	///  TO CONFIRM THAT `to` IS CAPABLE OF RECEIVING NFTS OR ELSE344	///  THEY MAY BE PERMANENTLY LOST345	/// @dev Throws unless `msg.sender` is the current owner or an authorized346	///  operator for this RFT. Throws if `from` is not the current owner. Throws347	///  if `to` is the zero address. Throws if `tokenId` is not a valid RFT.348	///  Throws if RFT pieces have multiple owners.349	/// @param from The current owner of the NFT350	/// @param to The new owner351	/// @param tokenId The NFT to transfer352	#[weight(<SelfWeightOf<T>>::transfer_from_creating_removing())]353	fn transfer_from(354		&mut self,355		caller: caller,356		from: address,357		to: address,358		token_id: uint256,359	) -> Result<void> {360		let caller = T::CrossAccountId::from_eth(caller);361		let from = T::CrossAccountId::from_eth(from);362		let to = T::CrossAccountId::from_eth(to);363		let token = token_id.try_into()?;364		let budget = self365			.recorder366			.weight_calls_budget(<StructureWeight<T>>::find_parent());367368		let balance = balance(&self, token, &from)?;369		ensure_single_owner(&self, token, balance)?;370371		<Pallet<T>>::transfer_from(self, &caller, &from, &to, token, balance, &budget)372			.map_err(dispatch_to_evm::<T>)?;373374		Ok(())375	}376377	/// @dev Not implemented378	fn approve(&mut self, _caller: caller, _approved: address, _token_id: uint256) -> Result<void> {379		Err("not implemented".into())380	}381382	/// @dev Not implemented383	fn set_approval_for_all(384		&mut self,385		_caller: caller,386		_operator: address,387		_approved: bool,388	) -> Result<void> {389		// TODO: Not implemetable390		Err("not implemented".into())391	}392393	/// @dev Not implemented394	fn get_approved(&self, _token_id: uint256) -> Result<address> {395		// TODO: Not implemetable396		Err("not implemented".into())397	}398399	/// @dev Not implemented400	fn is_approved_for_all(&self, _owner: address, _operator: address) -> Result<address> {401		// TODO: Not implemetable402		Err("not implemented".into())403	}404}405406/// Returns amount of pieces of `token` that `owner` have407pub fn balance<T: Config>(408	collection: &RefungibleHandle<T>,409	token: TokenId,410	owner: &T::CrossAccountId,411) -> Result<u128> {412	collection.consume_store_reads(1)?;413	let balance = <Balance<T>>::get((collection.id, token, &owner));414	Ok(balance)415}416417/// Throws if `owner_balance` is lower than total amount of `token` pieces418pub fn ensure_single_owner<T: Config>(419	collection: &RefungibleHandle<T>,420	token: TokenId,421	owner_balance: u128,422) -> Result<()> {423	collection.consume_store_reads(1)?;424	let total_supply = <TotalSupply<T>>::get((collection.id, token));425	if total_supply != owner_balance {426		return Err("token has multiple owners".into());427	}428	Ok(())429}430431/// @title ERC721 Token that can be irreversibly burned (destroyed).432#[solidity_interface(name = ERC721Burnable)]433impl<T: Config> RefungibleHandle<T> {434	/// @notice Burns a specific ERC721 token.435	/// @dev Throws unless `msg.sender` is the current RFT owner, or an authorized436	///  operator of the current owner.437	/// @param tokenId The RFT to approve438	#[weight(<SelfWeightOf<T>>::burn_item_fully())]439	fn burn(&mut self, caller: caller, token_id: uint256) -> Result<void> {440		let caller = T::CrossAccountId::from_eth(caller);441		let token = token_id.try_into()?;442443		let balance = balance(&self, token, &caller)?;444		ensure_single_owner(&self, token, balance)?;445446		<Pallet<T>>::burn(self, &caller, token, balance).map_err(dispatch_to_evm::<T>)?;447		Ok(())448	}449}450451/// @title ERC721 minting logic.452#[solidity_interface(name = ERC721UniqueMintable, events(ERC721UniqueMintableEvents))]453impl<T: Config> RefungibleHandle<T> {454	fn minting_finished(&self) -> Result<bool> {455		Ok(false)456	}457458	/// @notice Function to mint token.459	/// @param to The new owner460	/// @return uint256 The id of the newly minted token461	#[weight(<SelfWeightOf<T>>::create_item())]462	fn mint(&mut self, caller: caller, to: address) -> Result<uint256> {463		let token_id: uint256 = <TokensMinted<T>>::get(self.id)464			.checked_add(1)465			.ok_or("item id overflow")?466			.into();467		self.mint_check_id(caller, to, token_id)?;468		Ok(token_id)469	}470471	/// @notice Function to mint token.472	/// @dev `tokenId` should be obtained with `nextTokenId` method,473	///  unlike standard, you can't specify it manually474	/// @param to The new owner475	/// @param tokenId ID of the minted RFT476	#[solidity(hide, rename_selector = "mint")]477	#[weight(<SelfWeightOf<T>>::create_item())]478	fn mint_check_id(&mut self, caller: caller, to: address, token_id: uint256) -> Result<bool> {479		let caller = T::CrossAccountId::from_eth(caller);480		let to = T::CrossAccountId::from_eth(to);481		let token_id: u32 = token_id.try_into()?;482		let budget = self483			.recorder484			.weight_calls_budget(<StructureWeight<T>>::find_parent());485486		if <TokensMinted<T>>::get(self.id)487			.checked_add(1)488			.ok_or("item id overflow")?489			!= token_id490		{491			return Err("item id should be next".into());492		}493494		let users = [(to.clone(), 1)]495			.into_iter()496			.collect::<BTreeMap<_, _>>()497			.try_into()498			.unwrap();499		<Pallet<T>>::create_item(500			self,501			&caller,502			CreateItemData::<T::CrossAccountId> {503				users,504				properties: CollectionPropertiesVec::default(),505			},506			&budget,507		)508		.map_err(dispatch_to_evm::<T>)?;509510		Ok(true)511	}512513	/// @notice Function to mint token with the given tokenUri.514	/// @param to The new owner515	/// @param tokenUri Token URI that would be stored in the NFT properties516	/// @return uint256 The id of the newly minted token517	#[solidity(rename_selector = "mintWithTokenURI")]518	#[weight(<SelfWeightOf<T>>::create_item())]519	fn mint_with_token_uri(520		&mut self,521		caller: caller,522		to: address,523		token_uri: string,524	) -> Result<uint256> {525		let token_id: uint256 = <TokensMinted<T>>::get(self.id)526			.checked_add(1)527			.ok_or("item id overflow")?528			.into();529		self.mint_with_token_uri_check_id(caller, to, token_id, token_uri)?;530		Ok(token_id)531	}532533	/// @notice Function to mint token with the given tokenUri.534	/// @dev `tokenId` should be obtained with `nextTokenId` method,535	///  unlike standard, you can't specify it manually536	/// @param to The new owner537	/// @param tokenId ID of the minted RFT538	/// @param tokenUri Token URI that would be stored in the RFT properties539	#[solidity(hide, rename_selector = "mintWithTokenURI")]540	#[weight(<SelfWeightOf<T>>::create_item())]541	fn mint_with_token_uri_check_id(542		&mut self,543		caller: caller,544		to: address,545		token_id: uint256,546		token_uri: string,547	) -> Result<bool> {548		let key = key::url();549		let permission = get_token_permission::<T>(self.id, &key)?;550		if !permission.collection_admin {551			return Err("Operation is not allowed".into());552		}553554		let caller = T::CrossAccountId::from_eth(caller);555		let to = T::CrossAccountId::from_eth(to);556		let token_id: u32 = token_id.try_into().map_err(|_| "amount overflow")?;557		let budget = self558			.recorder559			.weight_calls_budget(<StructureWeight<T>>::find_parent());560561		if <TokensMinted<T>>::get(self.id)562			.checked_add(1)563			.ok_or("item id overflow")?564			!= token_id565		{566			return Err("item id should be next".into());567		}568569		let mut properties = CollectionPropertiesVec::default();570		properties571			.try_push(Property {572				key,573				value: token_uri574					.into_bytes()575					.try_into()576					.map_err(|_| "token uri is too long")?,577			})578			.map_err(|e| Error::Revert(alloc::format!("Can't add property: {:?}", e)))?;579580		let users = [(to.clone(), 1)]581			.into_iter()582			.collect::<BTreeMap<_, _>>()583			.try_into()584			.unwrap();585		<Pallet<T>>::create_item(586			self,587			&caller,588			CreateItemData::<T::CrossAccountId> { users, properties },589			&budget,590		)591		.map_err(dispatch_to_evm::<T>)?;592		Ok(true)593	}594595	/// @dev Not implemented596	fn finish_minting(&mut self, _caller: caller) -> Result<bool> {597		Err("not implementable".into())598	}599}600601fn get_token_property<T: Config>(602	collection: &CollectionHandle<T>,603	token_id: u32,604	key: &up_data_structs::PropertyKey,605) -> Result<string> {606	collection.consume_store_reads(1)?;607	let properties = <TokenProperties<T>>::try_get((collection.id, token_id))608		.map_err(|_| Error::Revert("Token properties not found".into()))?;609	if let Some(property) = properties.get(key) {610		return Ok(string::from_utf8_lossy(property).into());611	}612613	Err("Property tokenURI not found".into())614}615616fn get_token_permission<T: Config>(617	collection_id: CollectionId,618	key: &PropertyKey,619) -> Result<PropertyPermission> {620	let token_property_permissions = CollectionPropertyPermissions::<T>::try_get(collection_id)621		.map_err(|_| Error::Revert("No permissions for collection".into()))?;622	let a = token_property_permissions623		.get(key)624		.map(Clone::clone)625		.ok_or_else(|| {626			let key = string::from_utf8(key.clone().into_inner()).unwrap_or_default();627			Error::Revert(alloc::format!("No permission for key {}", key))628		})?;629	Ok(a)630}631632/// @title Unique extensions for ERC721.633#[solidity_interface(name = ERC721UniqueExtensions)]634impl<T: Config> RefungibleHandle<T> {635	/// @notice A descriptive name for a collection of NFTs in this contract636	fn name(&self) -> Result<string> {637		Ok(decode_utf16(self.name.iter().copied())638			.map(|r| r.unwrap_or(REPLACEMENT_CHARACTER))639			.collect::<string>())640	}641642	/// @notice An abbreviated name for NFTs in this contract643	fn symbol(&self) -> Result<string> {644		Ok(string::from_utf8_lossy(&self.token_prefix).into())645	}646647	/// @notice Transfer ownership of an RFT648	/// @dev Throws unless `msg.sender` is the current owner. Throws if `to`649	///  is the zero address. Throws if `tokenId` is not a valid RFT.650	///  Throws if RFT pieces have multiple owners.651	/// @param to The new owner652	/// @param tokenId The RFT to transfer653	#[weight(<SelfWeightOf<T>>::transfer_creating_removing())]654	fn transfer(&mut self, caller: caller, to: address, token_id: uint256) -> Result<void> {655		let caller = T::CrossAccountId::from_eth(caller);656		let to = T::CrossAccountId::from_eth(to);657		let token = token_id.try_into()?;658		let budget = self659			.recorder660			.weight_calls_budget(<StructureWeight<T>>::find_parent());661662		let balance = balance(&self, token, &caller)?;663		ensure_single_owner(&self, token, balance)?;664665		<Pallet<T>>::transfer(self, &caller, &to, token, balance, &budget)666			.map_err(dispatch_to_evm::<T>)?;667		Ok(())668	}669670	/// @notice Burns a specific ERC721 token.671	/// @dev Throws unless `msg.sender` is the current owner or an authorized672	///  operator for this RFT. Throws if `from` is not the current owner. Throws673	///  if `to` is the zero address. Throws if `tokenId` is not a valid RFT.674	///  Throws if RFT pieces have multiple owners.675	/// @param from The current owner of the RFT676	/// @param tokenId The RFT to transfer677	#[weight(<SelfWeightOf<T>>::burn_from())]678	fn burn_from(&mut self, caller: caller, from: address, token_id: uint256) -> Result<void> {679		let caller = T::CrossAccountId::from_eth(caller);680		let from = T::CrossAccountId::from_eth(from);681		let token = token_id.try_into()?;682		let budget = self683			.recorder684			.weight_calls_budget(<StructureWeight<T>>::find_parent());685686		let balance = balance(&self, token, &caller)?;687		ensure_single_owner(&self, token, balance)?;688689		<Pallet<T>>::burn_from(self, &caller, &from, token, balance, &budget)690			.map_err(dispatch_to_evm::<T>)?;691		Ok(())692	}693694	/// @notice Returns next free RFT ID.695	fn next_token_id(&self) -> Result<uint256> {696		self.consume_store_reads(1)?;697		Ok(<TokensMinted<T>>::get(self.id)698			.checked_add(1)699			.ok_or("item id overflow")?700			.into())701	}702703	/// @notice Function to mint multiple tokens.704	/// @dev `tokenIds` should be an array of consecutive numbers and first number705	///  should be obtained with `nextTokenId` method706	/// @param to The new owner707	/// @param tokenIds IDs of the minted RFTs708	#[solidity(hide)]709	#[weight(<SelfWeightOf<T>>::create_multiple_items(token_ids.len() as u32))]710	fn mint_bulk(&mut self, caller: caller, to: address, token_ids: Vec<uint256>) -> Result<bool> {711		let caller = T::CrossAccountId::from_eth(caller);712		let to = T::CrossAccountId::from_eth(to);713		let mut expected_index = <TokensMinted<T>>::get(self.id)714			.checked_add(1)715			.ok_or("item id overflow")?;716		let budget = self717			.recorder718			.weight_calls_budget(<StructureWeight<T>>::find_parent());719720		let total_tokens = token_ids.len();721		for id in token_ids.into_iter() {722			let id: u32 = id.try_into().map_err(|_| "token id overflow")?;723			if id != expected_index {724				return Err("item id should be next".into());725			}726			expected_index = expected_index.checked_add(1).ok_or("item id overflow")?;727		}728		let users = [(to.clone(), 1)]729			.into_iter()730			.collect::<BTreeMap<_, _>>()731			.try_into()732			.unwrap();733		let create_item_data = CreateItemData::<T::CrossAccountId> {734			users,735			properties: CollectionPropertiesVec::default(),736		};737		let data = (0..total_tokens)738			.map(|_| create_item_data.clone())739			.collect();740741		<Pallet<T>>::create_multiple_items(self, &caller, data, &budget)742			.map_err(dispatch_to_evm::<T>)?;743		Ok(true)744	}745746	/// @notice Function to mint multiple tokens with the given tokenUris.747	/// @dev `tokenIds` is array of pairs of token ID and token URI. Token IDs should be consecutive748	///  numbers and first number should be obtained with `nextTokenId` method749	/// @param to The new owner750	/// @param tokens array of pairs of token ID and token URI for minted tokens751	#[solidity(hide, rename_selector = "mintBulkWithTokenURI")]752	#[weight(<SelfWeightOf<T>>::create_multiple_items(tokens.len() as u32))]753	fn mint_bulk_with_token_uri(754		&mut self,755		caller: caller,756		to: address,757		tokens: Vec<(uint256, string)>,758	) -> Result<bool> {759		let key = key::url();760		let caller = T::CrossAccountId::from_eth(caller);761		let to = T::CrossAccountId::from_eth(to);762		let mut expected_index = <TokensMinted<T>>::get(self.id)763			.checked_add(1)764			.ok_or("item id overflow")?;765		let budget = self766			.recorder767			.weight_calls_budget(<StructureWeight<T>>::find_parent());768769		let mut data = Vec::with_capacity(tokens.len());770		let users: BoundedBTreeMap<_, _, _> = [(to.clone(), 1)]771			.into_iter()772			.collect::<BTreeMap<_, _>>()773			.try_into()774			.unwrap();775		for (id, token_uri) in tokens {776			let id: u32 = id.try_into().map_err(|_| "token id overflow")?;777			if id != expected_index {778				return Err("item id should be next".into());779			}780			expected_index = expected_index.checked_add(1).ok_or("item id overflow")?;781782			let mut properties = CollectionPropertiesVec::default();783			properties784				.try_push(Property {785					key: key.clone(),786					value: token_uri787						.into_bytes()788						.try_into()789						.map_err(|_| "token uri is too long")?,790				})791				.map_err(|e| Error::Revert(alloc::format!("Can't add property: {:?}", e)))?;792793			let create_item_data = CreateItemData::<T::CrossAccountId> {794				users: users.clone(),795				properties,796			};797			data.push(create_item_data);798		}799800		<Pallet<T>>::create_multiple_items(self, &caller, data, &budget)801			.map_err(dispatch_to_evm::<T>)?;802		Ok(true)803	}804805	/// Returns EVM address for refungible token806	///807	/// @param token ID of the token808	fn token_contract_address(&self, token: uint256) -> Result<address> {809		Ok(T::EvmTokenAddressMapping::token_to_address(810			self.id,811			token.try_into().map_err(|_| "token id overflow")?,812		))813	}814}815816#[solidity_interface(817	name = UniqueRefungible,818	is(819		ERC721,820		ERC721Enumerable,821		ERC721UniqueExtensions,822		ERC721UniqueMintable,823		ERC721Burnable,824		ERC721Metadata(if(this.flags.erc721metadata)),825		Collection(via(common_mut returns CollectionHandle<T>)),826		TokenProperties,827	)828)]829impl<T: Config> RefungibleHandle<T> where T::AccountId: From<[u8; 32]> + AsRef<[u8; 32]> {}830831// Not a tests, but code generators832generate_stubgen!(gen_impl, UniqueRefungibleCall<()>, true);833generate_stubgen!(gen_iface, UniqueRefungibleCall<()>, false);834835impl<T: Config> CommonEvmHandler for RefungibleHandle<T>836where837	T::AccountId: From<[u8; 32]> + AsRef<[u8; 32]>,838{839	const CODE: &'static [u8] = include_bytes!("./stubs/UniqueRefungible.raw");840	fn call(841		self,842		handle: &mut impl PrecompileHandle,843	) -> Option<pallet_common::erc::PrecompileResult> {844		call::<T, UniqueRefungibleCall<T>, _, _>(handle, self)845	}846}