git.delta.rocks / unique-network / refs/commits / c6f4c3e8f510

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//! # Nonfungible Pallet EVM API18//!19//! Provides ERC-721 standart support implementation and EVM API for unique extensions for Nonfungible Pallet.20//! Method implementations are mostly doing parameter conversion and calling Nonfungible Pallet methods.2122extern crate alloc;23use core::{24	char::{REPLACEMENT_CHARACTER, decode_utf16},25	convert::TryInto,26};27use evm_coder::{28	abi::AbiType, ToLog, execution::*, generate_stubgen, solidity, solidity_interface, types::*,29	types::Property as PropertyStruct, weight,30};31use frame_support::BoundedVec;32use up_data_structs::{33	TokenId, PropertyPermission, PropertyKeyPermission, Property, CollectionId, PropertyKey,34	CollectionPropertiesVec,35};36use pallet_evm_coder_substrate::dispatch_to_evm;37use sp_std::vec::Vec;38use pallet_common::{39	CollectionHandle, CollectionPropertyPermissions, CommonCollectionOperations,40	erc::{CommonEvmHandler, PrecompileResult, CollectionCall, static_property::key},41	eth::EthCrossAccount,42};43use pallet_evm::{account::CrossAccountId, PrecompileHandle};44use pallet_evm_coder_substrate::call;45use pallet_structure::{SelfWeightOf as StructureWeight, weights::WeightInfo as _};46use sp_core::Get;4748use crate::{49	AccountBalance, Config, CreateItemData, NonfungibleHandle, Pallet, TokenData, TokensMinted,50	SelfWeightOf, weights::WeightInfo, TokenProperties,51};5253/// @title A contract that allows to set and delete token properties and change token property permissions.54#[solidity_interface(name = TokenProperties)]55impl<T: Config> NonfungibleHandle<T> {56	/// @notice Set permissions for token property.57	/// @dev Throws error if `msg.sender` is not admin or owner of the collection.58	/// @param key Property key.59	/// @param isMutable Permission to mutate property.60	/// @param collectionAdmin Permission to mutate property by collection admin if property is mutable.61	/// @param tokenOwner Permission to mutate property by token owner if property is mutable.62	#[weight(<SelfWeightOf<T>>::set_token_property_permissions(1))]63	fn set_token_property_permission(64		&mut self,65		caller: caller,66		key: string,67		is_mutable: bool,68		collection_admin: bool,69		token_owner: bool,70	) -> Result<()> {71		let caller = T::CrossAccountId::from_eth(caller);72		<Pallet<T>>::set_property_permission(73			self,74			&caller,75			PropertyKeyPermission {76				key: <Vec<u8>>::from(key)77					.try_into()78					.map_err(|_| "too long key")?,79				permission: PropertyPermission {80					mutable: is_mutable,81					collection_admin,82					token_owner,83				},84			},85		)86		.map_err(dispatch_to_evm::<T>)87	}8889	/// @notice Set token property value.90	/// @dev Throws error if `msg.sender` has no permission to edit the property.91	/// @param tokenId ID of the token.92	/// @param key Property key.93	/// @param value Property value.94	#[solidity(hide)]95	#[weight(<SelfWeightOf<T>>::set_token_properties(1))]96	fn set_property(97		&mut self,98		caller: caller,99		token_id: uint256,100		key: string,101		value: bytes,102	) -> Result<()> {103		let caller = T::CrossAccountId::from_eth(caller);104		let token_id: u32 = token_id.try_into().map_err(|_| "token id overflow")?;105		let key = <Vec<u8>>::from(key)106			.try_into()107			.map_err(|_| "key too long")?;108		let value = value.0.try_into().map_err(|_| "value too long")?;109110		let nesting_budget = self111			.recorder112			.weight_calls_budget(<StructureWeight<T>>::find_parent());113114		<Pallet<T>>::set_token_property(115			self,116			&caller,117			TokenId(token_id),118			Property { key, value },119			&nesting_budget,120		)121		.map_err(dispatch_to_evm::<T>)122	}123124	/// @notice Set token properties value.125	/// @dev Throws error if `msg.sender` has no permission to edit the property.126	/// @param tokenId ID of the token.127	/// @param properties settable properties128	#[weight(<SelfWeightOf<T>>::set_token_properties(properties.len() as u32))]129	fn set_properties(130		&mut self,131		caller: caller,132		token_id: uint256,133		properties: Vec<PropertyStruct>,134	) -> Result<()> {135		let caller = T::CrossAccountId::from_eth(caller);136		let token_id: u32 = token_id.try_into().map_err(|_| "token id overflow")?;137138		let nesting_budget = self139			.recorder140			.weight_calls_budget(<StructureWeight<T>>::find_parent());141142		let properties = properties143			.into_iter()144			.map(|PropertyStruct { key, value }| {145				let key = <Vec<u8>>::from(key)146					.try_into()147					.map_err(|_| "key too large")?;148149				let value = value.0.try_into().map_err(|_| "value too large")?;150151				Ok(Property { key, value })152			})153			.collect::<Result<Vec<_>>>()?;154155		<Pallet<T>>::set_token_properties(156			self,157			&caller,158			TokenId(token_id),159			properties.into_iter(),160			false,161			&nesting_budget,162		)163		.map_err(dispatch_to_evm::<T>)164	}165166	/// @notice Delete token property value.167	/// @dev Throws error if `msg.sender` has no permission to edit the property.168	/// @param tokenId ID of the token.169	/// @param key Property key.170	#[solidity(hide)]171	#[weight(<SelfWeightOf<T>>::delete_token_properties(1))]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 Delete token properties value.188	/// @dev Throws error if `msg.sender` has no permission to edit the property.189	/// @param tokenId ID of the token.190	/// @param keys Properties key.191	#[weight(<SelfWeightOf<T>>::delete_token_properties(keys.len() as u32))]192	fn delete_properties(193		&mut self,194		token_id: uint256,195		caller: caller,196		keys: Vec<string>,197	) -> Result<()> {198		let caller = T::CrossAccountId::from_eth(caller);199		let token_id: u32 = token_id.try_into().map_err(|_| "token id overflow")?;200		let keys = keys201			.into_iter()202			.map(|k| Ok(<Vec<u8>>::from(k).try_into().map_err(|_| "key too long")?))203			.collect::<Result<Vec<_>>>()?;204205		let nesting_budget = self206			.recorder207			.weight_calls_budget(<StructureWeight<T>>::find_parent());208209		<Pallet<T>>::delete_token_properties(210			self,211			&caller,212			TokenId(token_id),213			keys.into_iter(),214			&nesting_budget,215		)216		.map_err(dispatch_to_evm::<T>)217	}218219	/// @notice Get token property value.220	/// @dev Throws error if key not found221	/// @param tokenId ID of the token.222	/// @param key Property key.223	/// @return Property value bytes224	fn property(&self, token_id: uint256, key: string) -> Result<bytes> {225		let token_id: u32 = token_id.try_into().map_err(|_| "token id overflow")?;226		let key = <Vec<u8>>::from(key)227			.try_into()228			.map_err(|_| "key too long")?;229230		let props = <TokenProperties<T>>::get((self.id, token_id));231		let prop = props.get(&key).ok_or("key not found")?;232233		Ok(prop.to_vec().into())234	}235}236237#[derive(ToLog)]238pub enum ERC721Events {239	/// @dev This emits when ownership of any NFT changes by any mechanism.240	///  This event emits when NFTs are created (`from` == 0) and destroyed241	///  (`to` == 0). Exception: during contract creation, any number of NFTs242	///  may be created and assigned without emitting Transfer. At the time of243	///  any transfer, the approved address for that NFT (if any) is reset to none.244	Transfer {245		#[indexed]246		from: address,247		#[indexed]248		to: address,249		#[indexed]250		token_id: uint256,251	},252	/// @dev This emits when the approved address for an NFT is changed or253	///  reaffirmed. The zero address indicates there is no approved address.254	///  When a Transfer event emits, this also indicates that the approved255	///  address for that NFT (if any) is reset to none.256	Approval {257		#[indexed]258		owner: address,259		#[indexed]260		approved: address,261		#[indexed]262		token_id: uint256,263	},264	/// @dev This emits when an operator is enabled or disabled for an owner.265	///  The operator can manage all NFTs of the owner.266	#[allow(dead_code)]267	ApprovalForAll {268		#[indexed]269		owner: address,270		#[indexed]271		operator: address,272		approved: bool,273	},274}275276#[derive(ToLog)]277pub enum ERC721UniqueMintableEvents {278	#[allow(dead_code)]279	MintingFinished {},280}281282/// @title ERC-721 Non-Fungible Token Standard, optional metadata extension283/// @dev See https://eips.ethereum.org/EIPS/eip-721284#[solidity_interface(name = ERC721Metadata, expect_selector = 0x5b5e139f)]285impl<T: Config> NonfungibleHandle<T>286where287	T::AccountId: From<[u8; 32]> + AsRef<[u8; 32]>,288{289	/// @notice A descriptive name for a collection of NFTs in this contract290	/// @dev real implementation of this function lies in `ERC721UniqueExtensions`291	#[solidity(hide, rename_selector = "name")]292	fn name_proxy(&self) -> Result<string> {293		self.name()294	}295296	/// @notice An abbreviated name for NFTs in this contract297	/// @dev real implementation of this function lies in `ERC721UniqueExtensions`298	#[solidity(hide, rename_selector = "symbol")]299	fn symbol_proxy(&self) -> Result<string> {300		self.symbol()301	}302303	/// @notice A distinct Uniform Resource Identifier (URI) for a given asset.304	///305	/// @dev If the token has a `url` property and it is not empty, it is returned.306	///  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`.307	///  If the collection property `baseURI` is empty or absent, return "" (empty string)308	///  otherwise, if token property `suffix` present and is non-empty, return concatenation of baseURI and suffix309	///  otherwise, return concatenation of `baseURI` and stringified token id (decimal stringifying, without paddings).310	///311	/// @return token's const_metadata312	#[solidity(rename_selector = "tokenURI")]313	fn token_uri(&self, token_id: uint256) -> Result<string> {314		let token_id_u32: u32 = token_id.try_into().map_err(|_| "token id overflow")?;315316		match get_token_property(self, token_id_u32, &key::url()).as_deref() {317			Err(_) | Ok("") => (),318			Ok(url) => {319				return Ok(url.into());320			}321		};322323		let base_uri =324			pallet_common::Pallet::<T>::get_collection_property(self.id, &key::base_uri())325				.map(BoundedVec::into_inner)326				.map(string::from_utf8)327				.transpose()328				.map_err(|e| {329					Error::Revert(alloc::format!(330						"Can not convert value \"baseURI\" to string with error \"{}\"",331						e332					))333				})?;334335		let base_uri = match base_uri.as_deref() {336			None | Some("") => {337				return Ok("".into());338			}339			Some(base_uri) => base_uri.into(),340		};341342		Ok(343			match get_token_property(self, token_id_u32, &key::suffix()).as_deref() {344				Err(_) | Ok("") => base_uri,345				Ok(suffix) => base_uri + suffix,346			},347		)348	}349}350351/// @title ERC-721 Non-Fungible Token Standard, optional enumeration extension352/// @dev See https://eips.ethereum.org/EIPS/eip-721353#[solidity_interface(name = ERC721Enumerable, expect_selector = 0x780e9d63)]354impl<T: Config> NonfungibleHandle<T> {355	/// @notice Enumerate valid NFTs356	/// @param index A counter less than `totalSupply()`357	/// @return The token identifier for the `index`th NFT,358	///  (sort order not specified)359	fn token_by_index(&self, index: uint256) -> Result<uint256> {360		Ok(index)361	}362363	/// @dev Not implemented364	fn token_of_owner_by_index(&self, _owner: address, _index: uint256) -> Result<uint256> {365		// TODO: Not implemetable366		Err("not implemented".into())367	}368369	/// @notice Count NFTs tracked by this contract370	/// @return A count of valid NFTs tracked by this contract, where each one of371	///  them has an assigned and queryable owner not equal to the zero address372	fn total_supply(&self) -> Result<uint256> {373		self.consume_store_reads(1)?;374		Ok(<Pallet<T>>::total_supply(self).into())375	}376}377378/// @title ERC-721 Non-Fungible Token Standard379/// @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md380#[solidity_interface(name = ERC721, events(ERC721Events), expect_selector = 0x80ac58cd)]381impl<T: Config> NonfungibleHandle<T> {382	/// @notice Count all NFTs assigned to an owner383	/// @dev NFTs assigned to the zero address are considered invalid, and this384	///  function throws for queries about the zero address.385	/// @param owner An address for whom to query the balance386	/// @return The number of NFTs owned by `owner`, possibly zero387	fn balance_of(&self, owner: address) -> Result<uint256> {388		self.consume_store_reads(1)?;389		let owner = T::CrossAccountId::from_eth(owner);390		let balance = <AccountBalance<T>>::get((self.id, owner));391		Ok(balance.into())392	}393	/// @notice Find the owner of an NFT394	/// @dev NFTs assigned to zero address are considered invalid, and queries395	///  about them do throw.396	/// @param tokenId The identifier for an NFT397	/// @return The address of the owner of the NFT398	fn owner_of(&self, token_id: uint256) -> Result<address> {399		self.consume_store_reads(1)?;400		let token: TokenId = token_id.try_into()?;401		Ok(*<TokenData<T>>::get((self.id, token))402			.ok_or("token not found")?403			.owner404			.as_eth())405	}406	/// @dev Not implemented407	#[solidity(rename_selector = "safeTransferFrom")]408	fn safe_transfer_from_with_data(409		&mut self,410		_from: address,411		_to: address,412		_token_id: uint256,413		_data: bytes,414	) -> Result<void> {415		// TODO: Not implemetable416		Err("not implemented".into())417	}418	/// @dev Not implemented419	fn safe_transfer_from(420		&mut self,421		_from: address,422		_to: address,423		_token_id: uint256,424	) -> Result<void> {425		// TODO: Not implemetable426		Err("not implemented".into())427	}428429	/// @notice Transfer ownership of an NFT -- THE CALLER IS RESPONSIBLE430	///  TO CONFIRM THAT `to` IS CAPABLE OF RECEIVING NFTS OR ELSE431	///  THEY MAY BE PERMANENTLY LOST432	/// @dev Throws unless `msg.sender` is the current owner or an authorized433	///  operator for this NFT. Throws if `from` is not the current owner. Throws434	///  if `to` is the zero address. Throws if `tokenId` is not a valid NFT.435	/// @param from The current owner of the NFT436	/// @param to The new owner437	/// @param tokenId The NFT to transfer438	#[weight(<SelfWeightOf<T>>::transfer_from())]439	fn transfer_from(440		&mut self,441		caller: caller,442		from: address,443		to: address,444		token_id: uint256,445	) -> Result<void> {446		let caller = T::CrossAccountId::from_eth(caller);447		let from = T::CrossAccountId::from_eth(from);448		let to = T::CrossAccountId::from_eth(to);449		let token = token_id.try_into()?;450		let budget = self451			.recorder452			.weight_calls_budget(<StructureWeight<T>>::find_parent());453454		<Pallet<T>>::transfer_from(self, &caller, &from, &to, token, &budget)455			.map_err(dispatch_to_evm::<T>)?;456		Ok(())457	}458459	/// @notice Set or reaffirm the approved address for an NFT460	/// @dev The zero address indicates there is no approved address.461	/// @dev Throws unless `msg.sender` is the current NFT owner, or an authorized462	///  operator of the current owner.463	/// @param approved The new approved NFT controller464	/// @param tokenId The NFT to approve465	#[weight(<SelfWeightOf<T>>::approve())]466	fn approve(&mut self, caller: caller, approved: address, token_id: uint256) -> Result<void> {467		let caller = T::CrossAccountId::from_eth(caller);468		let approved = T::CrossAccountId::from_eth(approved);469		let token = token_id.try_into()?;470471		<Pallet<T>>::set_allowance(self, &caller, token, Some(&approved))472			.map_err(dispatch_to_evm::<T>)?;473		Ok(())474	}475476	/// @notice Sets or unsets the approval of a given operator.477	/// The `operator` is allowed to transfer all tokens of the `caller` on their behalf.478	/// @param operator Operator479	/// @param approved Should operator status be granted or revoked?480	#[weight(<SelfWeightOf<T>>::set_allowance_for_all())]481	fn set_approval_for_all(482		&mut self,483		caller: caller,484		operator: address,485		approved: bool,486	) -> Result<void> {487		let caller = T::CrossAccountId::from_eth(caller);488		let operator = T::CrossAccountId::from_eth(operator);489490		<Pallet<T>>::set_allowance_for_all(self, &caller, &operator, approved)491			.map_err(dispatch_to_evm::<T>)?;492		Ok(())493	}494495	/// @dev Not implemented496	fn get_approved(&self, _token_id: uint256) -> Result<address> {497		// TODO: Not implemetable498		Err("not implemented".into())499	}500501	/// @notice Tells whether the given `owner` approves the `operator`.502	#[weight(<SelfWeightOf<T>>::allowance_for_all())]503	fn is_approved_for_all(&self, owner: address, operator: address) -> Result<bool> {504		let owner = T::CrossAccountId::from_eth(owner);505		let operator = T::CrossAccountId::from_eth(operator);506507		Ok(<Pallet<T>>::allowance_for_all(self, &owner, &operator))508	}509510	/// @notice Returns collection helper contract address511	fn collection_helper_address(&self) -> Result<address> {512		Ok(T::ContractAddress::get())513	}514}515516/// @title ERC721 Token that can be irreversibly burned (destroyed).517#[solidity_interface(name = ERC721Burnable)]518impl<T: Config> NonfungibleHandle<T> {519	/// @notice Burns a specific ERC721 token.520	/// @dev Throws unless `msg.sender` is the current NFT owner, or an authorized521	///  operator of the current owner.522	/// @param tokenId The NFT to approve523	#[weight(<SelfWeightOf<T>>::burn_item())]524	fn burn(&mut self, caller: caller, token_id: uint256) -> Result<void> {525		let caller = T::CrossAccountId::from_eth(caller);526		let token = token_id.try_into()?;527528		<Pallet<T>>::burn(self, &caller, token).map_err(dispatch_to_evm::<T>)?;529		Ok(())530	}531}532533/// @title ERC721 minting logic.534#[solidity_interface(name = ERC721UniqueMintable, events(ERC721UniqueMintableEvents))]535impl<T: Config> NonfungibleHandle<T> {536	fn minting_finished(&self) -> Result<bool> {537		Ok(false)538	}539540	/// @notice Function to mint token.541	/// @param to The new owner542	/// @return uint256 The id of the newly minted token543	#[weight(<SelfWeightOf<T>>::create_item())]544	fn mint(&mut self, caller: caller, to: address) -> Result<uint256> {545		let token_id: uint256 = <TokensMinted<T>>::get(self.id)546			.checked_add(1)547			.ok_or("item id overflow")?548			.into();549		self.mint_check_id(caller, to, token_id)?;550		Ok(token_id)551	}552553	/// @notice Function to mint token.554	/// @dev `tokenId` should be obtained with `nextTokenId` method,555	///  unlike standard, you can't specify it manually556	/// @param to The new owner557	/// @param tokenId ID of the minted NFT558	#[solidity(hide, rename_selector = "mint")]559	#[weight(<SelfWeightOf<T>>::create_item())]560	fn mint_check_id(&mut self, caller: caller, to: address, token_id: uint256) -> Result<bool> {561		let caller = T::CrossAccountId::from_eth(caller);562		let to = T::CrossAccountId::from_eth(to);563		let token_id: u32 = token_id.try_into()?;564		let budget = self565			.recorder566			.weight_calls_budget(<StructureWeight<T>>::find_parent());567568		if <TokensMinted<T>>::get(self.id)569			.checked_add(1)570			.ok_or("item id overflow")?571			!= token_id572		{573			return Err("item id should be next".into());574		}575576		<Pallet<T>>::create_item(577			self,578			&caller,579			CreateItemData::<T> {580				properties: BoundedVec::default(),581				owner: to,582			},583			&budget,584		)585		.map_err(dispatch_to_evm::<T>)?;586587		Ok(true)588	}589590	/// @notice Function to mint token with the given tokenUri.591	/// @param to The new owner592	/// @param tokenUri Token URI that would be stored in the NFT properties593	/// @return uint256 The id of the newly minted token594	#[solidity(rename_selector = "mintWithTokenURI")]595	#[weight(<SelfWeightOf<T>>::create_item())]596	fn mint_with_token_uri(597		&mut self,598		caller: caller,599		to: address,600		token_uri: string,601	) -> Result<uint256> {602		let token_id: uint256 = <TokensMinted<T>>::get(self.id)603			.checked_add(1)604			.ok_or("item id overflow")?605			.into();606		self.mint_with_token_uri_check_id(caller, to, token_id, token_uri)?;607		Ok(token_id)608	}609610	/// @notice Function to mint token with the given tokenUri.611	/// @dev `tokenId` should be obtained with `nextTokenId` method,612	///  unlike standard, you can't specify it manually613	/// @param to The new owner614	/// @param tokenId ID of the minted NFT615	/// @param tokenUri Token URI that would be stored in the NFT properties616	#[solidity(hide, rename_selector = "mintWithTokenURI")]617	#[weight(<SelfWeightOf<T>>::create_item())]618	fn mint_with_token_uri_check_id(619		&mut self,620		caller: caller,621		to: address,622		token_id: uint256,623		token_uri: string,624	) -> Result<bool> {625		let key = key::url();626		let permission = get_token_permission::<T>(self.id, &key)?;627		if !permission.collection_admin {628			return Err("Operation is not allowed".into());629		}630631		let caller = T::CrossAccountId::from_eth(caller);632		let to = T::CrossAccountId::from_eth(to);633		let token_id: u32 = token_id.try_into().map_err(|_| "amount overflow")?;634		let budget = self635			.recorder636			.weight_calls_budget(<StructureWeight<T>>::find_parent());637638		if <TokensMinted<T>>::get(self.id)639			.checked_add(1)640			.ok_or("item id overflow")?641			!= token_id642		{643			return Err("item id should be next".into());644		}645646		let mut properties = CollectionPropertiesVec::default();647		properties648			.try_push(Property {649				key,650				value: token_uri651					.into_bytes()652					.try_into()653					.map_err(|_| "token uri is too long")?,654			})655			.map_err(|e| Error::Revert(alloc::format!("Can't add property: {:?}", e)))?;656657		<Pallet<T>>::create_item(658			self,659			&caller,660			CreateItemData::<T> {661				properties,662				owner: to,663			},664			&budget,665		)666		.map_err(dispatch_to_evm::<T>)?;667		Ok(true)668	}669670	/// @dev Not implemented671	fn finish_minting(&mut self, _caller: caller) -> Result<bool> {672		Err("not implementable".into())673	}674}675676fn get_token_property<T: Config>(677	collection: &CollectionHandle<T>,678	token_id: u32,679	key: &up_data_structs::PropertyKey,680) -> Result<string> {681	collection.consume_store_reads(1)?;682	let properties = <TokenProperties<T>>::try_get((collection.id, token_id))683		.map_err(|_| Error::Revert("Token properties not found".into()))?;684	if let Some(property) = properties.get(key) {685		return Ok(string::from_utf8_lossy(property).into());686	}687688	Err("Property tokenURI not found".into())689}690691fn get_token_permission<T: Config>(692	collection_id: CollectionId,693	key: &PropertyKey,694) -> Result<PropertyPermission> {695	let token_property_permissions = CollectionPropertyPermissions::<T>::try_get(collection_id)696		.map_err(|_| Error::Revert("No permissions for collection".into()))?;697	let a = token_property_permissions698		.get(key)699		.map(Clone::clone)700		.ok_or_else(|| {701			let key = string::from_utf8(key.clone().into_inner()).unwrap_or_default();702			Error::Revert(alloc::format!("No permission for key {}", key))703		})?;704	Ok(a)705}706707/// @title Unique extensions for ERC721.708#[solidity_interface(name = ERC721UniqueExtensions)]709impl<T: Config> NonfungibleHandle<T>710where711	T::AccountId: From<[u8; 32]> + AsRef<[u8; 32]>,712{713	/// @notice A descriptive name for a collection of NFTs in this contract714	fn name(&self) -> Result<string> {715		Ok(decode_utf16(self.name.iter().copied())716			.map(|r| r.unwrap_or(REPLACEMENT_CHARACTER))717			.collect::<string>())718	}719720	/// @notice An abbreviated name for NFTs in this contract721	fn symbol(&self) -> Result<string> {722		Ok(string::from_utf8_lossy(&self.token_prefix).into())723	}724725	/// @notice A description for the collection.726	fn description(&self) -> Result<string> {727		Ok(decode_utf16(self.description.iter().copied())728			.map(|r| r.unwrap_or(REPLACEMENT_CHARACTER))729			.collect::<string>())730	}731732	/// Returns the owner (in cross format) of the token.733	///734	/// @param tokenId Id for the token.735	fn cross_owner_of(&self, token_id: uint256) -> Result<EthCrossAccount> {736		Self::token_owner(&self, token_id.try_into()?)737			.map(|o| EthCrossAccount::from_sub_cross_account::<T>(&o))738			.ok_or(Error::Revert("key too large".into()))739	}740741	/// Returns the token properties.742	///743	/// @param tokenId Id for the token.744	/// @param keys Properties keys. Empty keys for all propertyes.745	/// @return Vector of properties key/value pairs.746	fn properties(&self, token_id: uint256, keys: Vec<string>) -> Result<Vec<PropertyStruct>> {747		let keys = keys748			.into_iter()749			.map(|key| {750				<Vec<u8>>::from(key)751					.try_into()752					.map_err(|_| Error::Revert("key too large".into()))753			})754			.collect::<Result<Vec<_>>>()?;755756		<Self as CommonCollectionOperations<T>>::token_properties(757			&self,758			token_id.try_into()?,759			if keys.is_empty() { None } else { Some(keys) },760		)761		.into_iter()762		.map(|p| {763			let key = string::from_utf8(p.key.to_vec())764				.map_err(|e| Error::Revert(alloc::format!("{}", e)))?;765			let value = bytes(p.value.to_vec());766			Ok(PropertyStruct { key, value })767		})768		.collect::<Result<Vec<_>>>()769	}770771	/// @notice Set or reaffirm the approved address for an NFT772	/// @dev The zero address indicates there is no approved address.773	/// @dev Throws unless `msg.sender` is the current NFT owner, or an authorized774	///  operator of the current owner.775	/// @param approved The new substrate address approved NFT controller776	/// @param tokenId The NFT to approve777	#[weight(<SelfWeightOf<T>>::approve())]778	fn approve_cross(779		&mut self,780		caller: caller,781		approved: EthCrossAccount,782		token_id: uint256,783	) -> Result<void> {784		let caller = T::CrossAccountId::from_eth(caller);785		let approved = approved.into_sub_cross_account::<T>()?;786		let token = token_id.try_into()?;787788		<Pallet<T>>::set_allowance(self, &caller, token, Some(&approved))789			.map_err(dispatch_to_evm::<T>)?;790		Ok(())791	}792793	/// @notice Transfer ownership of an NFT794	/// @dev Throws unless `msg.sender` is the current owner. Throws if `to`795	///  is the zero address. Throws if `tokenId` is not a valid NFT.796	/// @param to The new owner797	/// @param tokenId The NFT to transfer798	#[weight(<SelfWeightOf<T>>::transfer())]799	fn transfer(&mut self, caller: caller, to: address, token_id: uint256) -> Result<void> {800		let caller = T::CrossAccountId::from_eth(caller);801		let to = T::CrossAccountId::from_eth(to);802		let token = token_id.try_into()?;803		let budget = self804			.recorder805			.weight_calls_budget(<StructureWeight<T>>::find_parent());806807		<Pallet<T>>::transfer(self, &caller, &to, token, &budget).map_err(dispatch_to_evm::<T>)?;808		Ok(())809	}810811	/// @notice Transfer ownership of an NFT812	/// @dev Throws unless `msg.sender` is the current owner. Throws if `to`813	///  is the zero address. Throws if `tokenId` is not a valid NFT.814	/// @param to The new owner815	/// @param tokenId The NFT to transfer816	#[weight(<SelfWeightOf<T>>::transfer())]817	fn transfer_cross(818		&mut self,819		caller: caller,820		to: EthCrossAccount,821		token_id: uint256,822	) -> Result<void> {823		let caller = T::CrossAccountId::from_eth(caller);824		let to = to.into_sub_cross_account::<T>()?;825		let token = token_id.try_into()?;826		let budget = self827			.recorder828			.weight_calls_budget(<StructureWeight<T>>::find_parent());829830		<Pallet<T>>::transfer(self, &caller, &to, token, &budget).map_err(dispatch_to_evm::<T>)?;831		Ok(())832	}833834	/// @notice Transfer ownership of an NFT from cross account address to cross account address835	/// @dev Throws unless `msg.sender` is the current owner. Throws if `to`836	///  is the zero address. Throws if `tokenId` is not a valid NFT.837	/// @param from Cross acccount address of current owner838	/// @param to Cross acccount address of new owner839	/// @param tokenId The NFT to transfer840	#[weight(<SelfWeightOf<T>>::transfer())]841	fn transfer_from_cross(842		&mut self,843		caller: caller,844		from: EthCrossAccount,845		to: EthCrossAccount,846		token_id: uint256,847	) -> Result<void> {848		let caller = T::CrossAccountId::from_eth(caller);849		let from = from.into_sub_cross_account::<T>()?;850		let to = to.into_sub_cross_account::<T>()?;851		let token_id = token_id.try_into()?;852		let budget = self853			.recorder854			.weight_calls_budget(<StructureWeight<T>>::find_parent());855		Pallet::<T>::transfer_from(self, &caller, &from, &to, token_id, &budget)856			.map_err(dispatch_to_evm::<T>)?;857		Ok(())858	}859860	/// @notice Burns a specific ERC721 token.861	/// @dev Throws unless `msg.sender` is the current owner or an authorized862	///  operator for this NFT. Throws if `from` is not the current owner. Throws863	///  if `to` is the zero address. Throws if `tokenId` is not a valid NFT.864	/// @param from The current owner of the NFT865	/// @param tokenId The NFT to transfer866	#[solidity(hide)]867	#[weight(<SelfWeightOf<T>>::burn_from())]868	fn burn_from(&mut self, caller: caller, from: address, token_id: uint256) -> Result<void> {869		let caller = T::CrossAccountId::from_eth(caller);870		let from = T::CrossAccountId::from_eth(from);871		let token = token_id.try_into()?;872		let budget = self873			.recorder874			.weight_calls_budget(<StructureWeight<T>>::find_parent());875876		<Pallet<T>>::burn_from(self, &caller, &from, token, &budget)877			.map_err(dispatch_to_evm::<T>)?;878		Ok(())879	}880881	/// @notice Burns a specific ERC721 token.882	/// @dev Throws unless `msg.sender` is the current owner or an authorized883	///  operator for this NFT. Throws if `from` is not the current owner. Throws884	///  if `to` is the zero address. Throws if `tokenId` is not a valid NFT.885	/// @param from The current owner of the NFT886	/// @param tokenId The NFT to transfer887	#[weight(<SelfWeightOf<T>>::burn_from())]888	fn burn_from_cross(889		&mut self,890		caller: caller,891		from: EthCrossAccount,892		token_id: uint256,893	) -> Result<void> {894		let caller = T::CrossAccountId::from_eth(caller);895		let from = from.into_sub_cross_account::<T>()?;896		let token = token_id.try_into()?;897		let budget = self898			.recorder899			.weight_calls_budget(<StructureWeight<T>>::find_parent());900901		<Pallet<T>>::burn_from(self, &caller, &from, token, &budget)902			.map_err(dispatch_to_evm::<T>)?;903		Ok(())904	}905906	/// @notice Returns next free NFT ID.907	fn next_token_id(&self) -> Result<uint256> {908		self.consume_store_reads(1)?;909		Ok(<TokensMinted<T>>::get(self.id)910			.checked_add(1)911			.ok_or("item id overflow")?912			.into())913	}914915	/// @notice Function to mint multiple tokens.916	/// @dev `tokenIds` should be an array of consecutive numbers and first number917	///  should be obtained with `nextTokenId` method918	/// @param to The new owner919	/// @param tokenIds IDs of the minted NFTs920	#[solidity(hide)]921	#[weight(<SelfWeightOf<T>>::create_multiple_items(token_ids.len() as u32))]922	fn mint_bulk(&mut self, caller: caller, to: address, token_ids: Vec<uint256>) -> Result<bool> {923		let caller = T::CrossAccountId::from_eth(caller);924		let to = T::CrossAccountId::from_eth(to);925		let mut expected_index = <TokensMinted<T>>::get(self.id)926			.checked_add(1)927			.ok_or("item id overflow")?;928		let budget = self929			.recorder930			.weight_calls_budget(<StructureWeight<T>>::find_parent());931932		let total_tokens = token_ids.len();933		for id in token_ids.into_iter() {934			let id: u32 = id.try_into().map_err(|_| "token id overflow")?;935			if id != expected_index {936				return Err("item id should be next".into());937			}938			expected_index = expected_index.checked_add(1).ok_or("item id overflow")?;939		}940		let data = (0..total_tokens)941			.map(|_| CreateItemData::<T> {942				properties: BoundedVec::default(),943				owner: to.clone(),944			})945			.collect();946947		<Pallet<T>>::create_multiple_items(self, &caller, data, &budget)948			.map_err(dispatch_to_evm::<T>)?;949		Ok(true)950	}951952	/// @notice Function to mint multiple tokens with the given tokenUris.953	/// @dev `tokenIds` is array of pairs of token ID and token URI. Token IDs should be consecutive954	///  numbers and first number should be obtained with `nextTokenId` method955	/// @param to The new owner956	/// @param tokens array of pairs of token ID and token URI for minted tokens957	#[solidity(hide, rename_selector = "mintBulkWithTokenURI")]958	#[weight(<SelfWeightOf<T>>::create_multiple_items(tokens.len() as u32))]959	fn mint_bulk_with_token_uri(960		&mut self,961		caller: caller,962		to: address,963		tokens: Vec<(uint256, string)>,964	) -> Result<bool> {965		let key = key::url();966		let caller = T::CrossAccountId::from_eth(caller);967		let to = T::CrossAccountId::from_eth(to);968		let mut expected_index = <TokensMinted<T>>::get(self.id)969			.checked_add(1)970			.ok_or("item id overflow")?;971		let budget = self972			.recorder973			.weight_calls_budget(<StructureWeight<T>>::find_parent());974975		let mut data = Vec::with_capacity(tokens.len());976		for (id, token_uri) in tokens {977			let id: u32 = id.try_into().map_err(|_| "token id overflow")?;978			if id != expected_index {979				return Err("item id should be next".into());980			}981			expected_index = expected_index.checked_add(1).ok_or("item id overflow")?;982983			let mut properties = CollectionPropertiesVec::default();984			properties985				.try_push(Property {986					key: key.clone(),987					value: token_uri988						.into_bytes()989						.try_into()990						.map_err(|_| "token uri is too long")?,991				})992				.map_err(|e| Error::Revert(alloc::format!("Can't add property: {:?}", e)))?;993994			data.push(CreateItemData::<T> {995				properties,996				owner: to.clone(),997			});998		}9991000		<Pallet<T>>::create_multiple_items(self, &caller, data, &budget)1001			.map_err(dispatch_to_evm::<T>)?;1002		Ok(true)1003	}1004}10051006#[solidity_interface(1007	name = UniqueNFT,1008	is(1009		ERC721,1010		ERC721Enumerable,1011		ERC721UniqueExtensions,1012		ERC721UniqueMintable,1013		ERC721Burnable,1014		ERC721Metadata(if(this.flags.erc721metadata)),1015		Collection(via(common_mut returns CollectionHandle<T>)),1016		TokenProperties,1017	)1018)]1019impl<T: Config> NonfungibleHandle<T> where T::AccountId: From<[u8; 32]> + AsRef<[u8; 32]> {}10201021// Not a tests, but code generators1022generate_stubgen!(gen_impl, UniqueNFTCall<()>, true);1023generate_stubgen!(gen_iface, UniqueNFTCall<()>, false);10241025impl<T: Config> CommonEvmHandler for NonfungibleHandle<T>1026where1027	T::AccountId: From<[u8; 32]> + AsRef<[u8; 32]>,1028{1029	const CODE: &'static [u8] = include_bytes!("./stubs/UniqueNFT.raw");10301031	fn call(self, handle: &mut impl PrecompileHandle) -> Option<PrecompileResult> {1032		call::<T, UniqueNFTCall<T>, _, _>(handle, self)1033	}1034}