git.delta.rocks / unique-network / refs/commits / e0f86c78a536

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 token pieces18//!19//! Provides ERC-20 standart support implementation and EVM API for unique extensions for Refungible Pallet.20//! Method implementations are mostly doing parameter conversion and calling Nonfungible Pallet methods.2122use core::{23	char::{REPLACEMENT_CHARACTER, decode_utf16},24	convert::TryInto,25	ops::Deref,26};27use evm_coder::{28	abi::AbiType, ToLog, execution::*, generate_stubgen, solidity_interface, solidity, types::*,29	weight,30};31use pallet_common::{32	CommonWeightInfo,33	erc::{CommonEvmHandler, PrecompileResult},34	eth::collection_id_to_address,35};36use pallet_evm::{account::CrossAccountId, PrecompileHandle};37use pallet_evm_coder_substrate::{call, dispatch_to_evm, WithRecorder};38use pallet_structure::{SelfWeightOf as StructureWeight, weights::WeightInfo as _};39use sp_std::vec::Vec;40use sp_core::U256;41use up_data_structs::TokenId;4243use crate::{44	Allowance, Balance, common::CommonWeights, Config, Pallet, RefungibleHandle, SelfWeightOf,45	TotalSupply, weights::WeightInfo,46};4748/// Refungible token handle contains information about token's collection and id49///50/// RefungibleTokenHandle doesn't check token's existance upon creation51pub struct RefungibleTokenHandle<T: Config>(pub RefungibleHandle<T>, pub TokenId);5253#[solidity_interface(name = ERC1633)]54impl<T: Config> RefungibleTokenHandle<T> {55	fn parent_token(&self) -> Result<Address> {56		Ok(collection_id_to_address(self.id))57	}5859	fn parent_token_id(&self) -> Result<U256> {60		Ok(self.1.into())61	}62}6364#[derive(ToLog)]65pub enum ERC20Events {66	/// @dev This event is emitted when the amount of tokens (value) is sent67	/// from the from address to the to address. In the case of minting new68	/// tokens, the transfer is usually from the 0 address while in the case69	/// of burning tokens the transfer is to 0.70	Transfer {71		#[indexed]72		from: Address,73		#[indexed]74		to: Address,75		value: U256,76	},77	/// @dev This event is emitted when the amount of tokens (value) is approved78	/// by the owner to be used by the spender.79	Approval {80		#[indexed]81		owner: Address,82		#[indexed]83		spender: Address,84		value: U256,85	},86}8788/// @title Standard ERC20 token89///90/// @dev Implementation of the basic standard token.91/// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md92#[solidity_interface(name = ERC20, events(ERC20Events))]93impl<T: Config> RefungibleTokenHandle<T> {94	/// @return the name of the token.95	fn name(&self) -> Result<String> {96		Ok(decode_utf16(self.name.iter().copied())97			.map(|r| r.unwrap_or(REPLACEMENT_CHARACTER))98			.collect::<String>())99	}100101	/// @return the symbol of the token.102	fn symbol(&self) -> Result<String> {103		Ok(String::from_utf8_lossy(&self.token_prefix).into())104	}105106	/// @dev Total number of tokens in existence107	fn total_supply(&self) -> Result<U256> {108		self.consume_store_reads(1)?;109		Ok(<TotalSupply<T>>::get((self.id, self.1)).into())110	}111112	/// @dev Not supported113	fn decimals(&self) -> Result<u8> {114		// Decimals aren't supported for refungible tokens115		Ok(0)116	}117118	/// @dev Gets the balance of the specified address.119	/// @param owner The address to query the balance of.120	/// @return An uint256 representing the amount owned by the passed address.121	fn balance_of(&self, owner: Address) -> Result<U256> {122		self.consume_store_reads(1)?;123		let owner = T::CrossAccountId::from_eth(owner);124		let balance = <Balance<T>>::get((self.id, self.1, owner));125		Ok(balance.into())126	}127128	/// @dev Transfer token for a specified address129	/// @param to The address to transfer to.130	/// @param amount The amount to be transferred.131	#[weight(<CommonWeights<T>>::transfer())]132	fn transfer(&mut self, caller: Caller, to: Address, amount: U256) -> Result<bool> {133		let caller = T::CrossAccountId::from_eth(caller);134		let to = T::CrossAccountId::from_eth(to);135		let amount = amount.try_into().map_err(|_| "amount overflow")?;136		let budget = self137			.recorder138			.weight_calls_budget(<StructureWeight<T>>::find_parent());139140		<Pallet<T>>::transfer(self, &caller, &to, self.1, amount, &budget)141			.map_err(dispatch_to_evm::<T>)?;142		Ok(true)143	}144145	/// @dev Transfer tokens from one address to another146	/// @param from address The address which you want to send tokens from147	/// @param to address The address which you want to transfer to148	/// @param amount uint256 the amount of tokens to be transferred149	#[weight(<CommonWeights<T>>::transfer_from())]150	fn transfer_from(151		&mut self,152		caller: Caller,153		from: Address,154		to: Address,155		amount: U256,156	) -> Result<bool> {157		let caller = T::CrossAccountId::from_eth(caller);158		let from = T::CrossAccountId::from_eth(from);159		let to = T::CrossAccountId::from_eth(to);160		let amount = amount.try_into().map_err(|_| "amount overflow")?;161		let budget = self162			.recorder163			.weight_calls_budget(<StructureWeight<T>>::find_parent());164165		<Pallet<T>>::transfer_from(self, &caller, &from, &to, self.1, amount, &budget)166			.map_err(dispatch_to_evm::<T>)?;167		Ok(true)168	}169170	/// @dev Approve the passed address to spend the specified amount of tokens on behalf of `msg.sender`.171	/// Beware that changing an allowance with this method brings the risk that someone may use both the old172	/// and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this173	/// race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:174	/// https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729175	/// @param spender The address which will spend the funds.176	/// @param amount The amount of tokens to be spent.177	#[weight(<SelfWeightOf<T>>::approve())]178	fn approve(&mut self, caller: Caller, spender: Address, amount: U256) -> Result<bool> {179		let caller = T::CrossAccountId::from_eth(caller);180		let spender = T::CrossAccountId::from_eth(spender);181		let amount = amount.try_into().map_err(|_| "amount overflow")?;182183		<Pallet<T>>::set_allowance(self, &caller, &spender, self.1, amount)184			.map_err(dispatch_to_evm::<T>)?;185		Ok(true)186	}187188	/// @dev Function to check the amount of tokens that an owner allowed to a spender.189	/// @param owner address The address which owns the funds.190	/// @param spender address The address which will spend the funds.191	/// @return A uint256 specifying the amount of tokens still available for the spender.192	fn allowance(&self, owner: Address, spender: Address) -> Result<U256> {193		self.consume_store_reads(1)?;194		let owner = T::CrossAccountId::from_eth(owner);195		let spender = T::CrossAccountId::from_eth(spender);196197		Ok(<Allowance<T>>::get((self.id, self.1, owner, spender)).into())198	}199}200201#[solidity_interface(name = ERC20UniqueExtensions)]202impl<T: Config> RefungibleTokenHandle<T>203where204	T::AccountId: From<[u8; 32]>,205{206	/// @dev Function to check the amount of tokens that an owner allowed to a spender.207	/// @param owner crossAddress The address which owns the funds.208	/// @param spender crossAddress The address which will spend the funds.209	/// @return A uint256 specifying the amount of tokens still available for the spender.210	fn allowance_cross(211		&self,212		owner: pallet_common::eth::CrossAddress,213		spender: pallet_common::eth::CrossAddress,214	) -> Result<U256> {215		let owner = owner.into_sub_cross_account::<T>()?;216		let spender = spender.into_sub_cross_account::<T>()?;217218		Ok(<Allowance<T>>::get((self.id, self.1, owner, spender)).into())219	}220221	/// @dev Function that burns an amount of the token of a given account,222	/// deducting from the sender's allowance for said account.223	/// @param from The account whose tokens will be burnt.224	/// @param amount The amount that will be burnt.225	#[weight(<SelfWeightOf<T>>::burn_from())]226	#[solidity(hide)]227	fn burn_from(&mut self, caller: Caller, from: Address, amount: U256) -> Result<bool> {228		let caller = T::CrossAccountId::from_eth(caller);229		let from = T::CrossAccountId::from_eth(from);230		let amount = amount.try_into().map_err(|_| "amount overflow")?;231		let budget = self232			.recorder233			.weight_calls_budget(<StructureWeight<T>>::find_parent());234235		<Pallet<T>>::burn_from(self, &caller, &from, self.1, amount, &budget)236			.map_err(dispatch_to_evm::<T>)?;237		Ok(true)238	}239240	/// @dev Function that burns an amount of the token of a given account,241	/// deducting from the sender's allowance for said account.242	/// @param from The account whose tokens will be burnt.243	/// @param amount The amount that will be burnt.244	#[weight(<SelfWeightOf<T>>::burn_from())]245	fn burn_from_cross(246		&mut self,247		caller: Caller,248		from: pallet_common::eth::CrossAddress,249		amount: U256,250	) -> Result<bool> {251		let caller = T::CrossAccountId::from_eth(caller);252		let from = from.into_sub_cross_account::<T>()?;253		let amount = amount.try_into().map_err(|_| "amount overflow")?;254		let budget = self255			.recorder256			.weight_calls_budget(<StructureWeight<T>>::find_parent());257258		<Pallet<T>>::burn_from(self, &caller, &from, self.1, amount, &budget)259			.map_err(dispatch_to_evm::<T>)?;260		Ok(true)261	}262263	/// @dev Approve the passed address to spend the specified amount of tokens on behalf of `msg.sender`.264	/// Beware that changing an allowance with this method brings the risk that someone may use both the old265	/// and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this266	/// race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:267	/// https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729268	/// @param spender The crossaccount which will spend the funds.269	/// @param amount The amount of tokens to be spent.270	#[weight(<SelfWeightOf<T>>::approve())]271	fn approve_cross(272		&mut self,273		caller: Caller,274		spender: pallet_common::eth::CrossAddress,275		amount: U256,276	) -> Result<bool> {277		let caller = T::CrossAccountId::from_eth(caller);278		let spender = spender.into_sub_cross_account::<T>()?;279		let amount = amount.try_into().map_err(|_| "amount overflow")?;280281		<Pallet<T>>::set_allowance(self, &caller, &spender, self.1, amount)282			.map_err(dispatch_to_evm::<T>)?;283		Ok(true)284	}285	/// @dev Function that changes total amount of the tokens.286	///  Throws if `msg.sender` doesn't owns all of the tokens.287	/// @param amount New total amount of the tokens.288	#[weight(<SelfWeightOf<T>>::repartition_item())]289	fn repartition(&mut self, caller: Caller, amount: U256) -> Result<bool> {290		let caller = T::CrossAccountId::from_eth(caller);291		let amount = amount.try_into().map_err(|_| "amount overflow")?;292293		<Pallet<T>>::repartition(self, &caller, self.1, amount).map_err(dispatch_to_evm::<T>)?;294		Ok(true)295	}296297	/// @dev Transfer token for a specified address298	/// @param to The crossaccount to transfer to.299	/// @param amount The amount to be transferred.300	#[weight(<CommonWeights<T>>::transfer())]301	fn transfer_cross(302		&mut self,303		caller: Caller,304		to: pallet_common::eth::CrossAddress,305		amount: U256,306	) -> Result<bool> {307		let caller = T::CrossAccountId::from_eth(caller);308		let to = to.into_sub_cross_account::<T>()?;309		let amount = amount.try_into().map_err(|_| "amount overflow")?;310		let budget = self311			.recorder312			.weight_calls_budget(<StructureWeight<T>>::find_parent());313314		<Pallet<T>>::transfer(self, &caller, &to, self.1, amount, &budget)315			.map_err(dispatch_to_evm::<T>)?;316		Ok(true)317	}318319	/// @dev Transfer tokens from one address to another320	/// @param from The address which you want to send tokens from321	/// @param to The address which you want to transfer to322	/// @param amount the amount of tokens to be transferred323	#[weight(<CommonWeights<T>>::transfer_from())]324	fn transfer_from_cross(325		&mut self,326		caller: Caller,327		from: pallet_common::eth::CrossAddress,328		to: pallet_common::eth::CrossAddress,329		amount: U256,330	) -> Result<bool> {331		let caller = T::CrossAccountId::from_eth(caller);332		let from = from.into_sub_cross_account::<T>()?;333		let to = to.into_sub_cross_account::<T>()?;334		let amount = amount.try_into().map_err(|_| "amount overflow")?;335		let budget = self336			.recorder337			.weight_calls_budget(<StructureWeight<T>>::find_parent());338339		<Pallet<T>>::transfer_from(self, &caller, &from, &to, self.1, amount, &budget)340			.map_err(dispatch_to_evm::<T>)?;341		Ok(true)342	}343}344345impl<T: Config> RefungibleTokenHandle<T> {346	pub fn into_inner(self) -> RefungibleHandle<T> {347		self.0348	}349	pub fn common_mut(&mut self) -> &mut RefungibleHandle<T> {350		&mut self.0351	}352}353354impl<T: Config> WithRecorder<T> for RefungibleTokenHandle<T> {355	fn recorder(&self) -> &pallet_evm_coder_substrate::SubstrateRecorder<T> {356		self.0.recorder()357	}358	fn into_recorder(self) -> pallet_evm_coder_substrate::SubstrateRecorder<T> {359		self.0.into_recorder()360	}361}362363impl<T: Config> Deref for RefungibleTokenHandle<T> {364	type Target = RefungibleHandle<T>;365366	fn deref(&self) -> &Self::Target {367		&self.0368	}369}370371#[solidity_interface(372	name = UniqueRefungibleToken,373	is(ERC20, ERC20UniqueExtensions, ERC1633)374)]375impl<T: Config> RefungibleTokenHandle<T> where T::AccountId: From<[u8; 32]> {}376377generate_stubgen!(gen_impl, UniqueRefungibleTokenCall<()>, true);378generate_stubgen!(gen_iface, UniqueRefungibleTokenCall<()>, false);379380impl<T: Config> CommonEvmHandler for RefungibleTokenHandle<T>381where382	T::AccountId: From<[u8; 32]>,383{384	const CODE: &'static [u8] = include_bytes!("./stubs/UniqueRefungibleToken.raw");385386	fn call(self, handle: &mut impl PrecompileHandle) -> Option<PrecompileResult> {387		call::<T, UniqueRefungibleTokenCall<T>, _, _>(handle, self)388	}389}