git.delta.rocks / unique-network / refs/commits / a06d0b862ada

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//! ERC-20 standart support implementation.1819extern crate alloc;20use core::char::{REPLACEMENT_CHARACTER, decode_utf16};21use core::convert::TryInto;22use evm_coder::{23	abi::AbiType, ToLog, execution::*, generate_stubgen, solidity, solidity_interface, types::*,24	weight,25};26use up_data_structs::CollectionMode;27use pallet_common::{28	CollectionHandle,29	erc::{CommonEvmHandler, PrecompileResult, CollectionCall},30};31use sp_std::vec::Vec;32use pallet_evm::{account::CrossAccountId, PrecompileHandle};33use pallet_evm_coder_substrate::{call, dispatch_to_evm};34use pallet_structure::{SelfWeightOf as StructureWeight, weights::WeightInfo as _};35use sp_core::{U256, Get};3637use crate::{38	Allowance, Balance, Config, FungibleHandle, Pallet, SelfWeightOf, TotalSupply,39	weights::WeightInfo,40};4142#[derive(ToLog)]43pub enum ERC20Events {44	Transfer {45		#[indexed]46		from: Address,47		#[indexed]48		to: Address,49		value: U256,50	},51	Approval {52		#[indexed]53		owner: Address,54		#[indexed]55		spender: Address,56		value: U256,57	},58}5960#[solidity_interface(name = ERC20, events(ERC20Events), expect_selector = 0x942e8b22)]61impl<T: Config> FungibleHandle<T> {62	fn name(&self) -> Result<String> {63		Ok(decode_utf16(self.name.iter().copied())64			.map(|r| r.unwrap_or(REPLACEMENT_CHARACTER))65			.collect::<String>())66	}67	fn symbol(&self) -> Result<String> {68		Ok(String::from_utf8_lossy(&self.token_prefix).into())69	}70	fn total_supply(&self) -> Result<U256> {71		self.consume_store_reads(1)?;72		Ok(<TotalSupply<T>>::get(self.id).into())73	}7475	fn decimals(&self) -> Result<u8> {76		Ok(if let CollectionMode::Fungible(decimals) = &self.mode {77			*decimals78		} else {79			unreachable!()80		})81	}82	fn balance_of(&self, owner: Address) -> Result<U256> {83		self.consume_store_reads(1)?;84		let owner = T::CrossAccountId::from_eth(owner);85		let balance = <Balance<T>>::get((self.id, owner));86		Ok(balance.into())87	}88	#[weight(<SelfWeightOf<T>>::transfer())]89	fn transfer(&mut self, caller: Caller, to: Address, amount: U256) -> Result<bool> {90		let caller = T::CrossAccountId::from_eth(caller);91		let to = T::CrossAccountId::from_eth(to);92		let amount = amount.try_into().map_err(|_| "amount overflow")?;93		let budget = self94			.recorder95			.weight_calls_budget(<StructureWeight<T>>::find_parent());9697		<Pallet<T>>::transfer(self, &caller, &to, amount, &budget).map_err(|_| "transfer error")?;98		Ok(true)99	}100101	#[weight(<SelfWeightOf<T>>::transfer_from())]102	fn transfer_from(103		&mut self,104		caller: Caller,105		from: Address,106		to: Address,107		amount: U256,108	) -> Result<bool> {109		let caller = T::CrossAccountId::from_eth(caller);110		let from = T::CrossAccountId::from_eth(from);111		let to = T::CrossAccountId::from_eth(to);112		let amount = amount.try_into().map_err(|_| "amount overflow")?;113		let budget = self114			.recorder115			.weight_calls_budget(<StructureWeight<T>>::find_parent());116117		<Pallet<T>>::transfer_from(self, &caller, &from, &to, amount, &budget)118			.map_err(dispatch_to_evm::<T>)?;119		Ok(true)120	}121	#[weight(<SelfWeightOf<T>>::approve())]122	fn approve(&mut self, caller: Caller, spender: Address, amount: U256) -> Result<bool> {123		let caller = T::CrossAccountId::from_eth(caller);124		let spender = T::CrossAccountId::from_eth(spender);125		let amount = amount.try_into().map_err(|_| "amount overflow")?;126127		<Pallet<T>>::set_allowance(self, &caller, &spender, amount)128			.map_err(dispatch_to_evm::<T>)?;129		Ok(true)130	}131	fn allowance(&self, owner: Address, spender: Address) -> Result<U256> {132		self.consume_store_reads(1)?;133		let owner = T::CrossAccountId::from_eth(owner);134		let spender = T::CrossAccountId::from_eth(spender);135136		Ok(<Allowance<T>>::get((self.id, owner, spender)).into())137	}138}139140#[solidity_interface(name = ERC20Mintable)]141impl<T: Config> FungibleHandle<T> {142	/// Mint tokens for `to` account.143	/// @param to account that will receive minted tokens144	/// @param amount amount of tokens to mint145	#[weight(<SelfWeightOf<T>>::create_item())]146	fn mint(&mut self, caller: Caller, to: Address, amount: U256) -> Result<bool> {147		let caller = T::CrossAccountId::from_eth(caller);148		let to = T::CrossAccountId::from_eth(to);149		let amount = amount.try_into().map_err(|_| "amount overflow")?;150		let budget = self151			.recorder152			.weight_calls_budget(<StructureWeight<T>>::find_parent());153		<Pallet<T>>::create_item(&self, &caller, (to, amount), &budget)154			.map_err(dispatch_to_evm::<T>)?;155		Ok(true)156	}157}158159#[solidity_interface(name = ERC20UniqueExtensions)]160impl<T: Config> FungibleHandle<T>161where162	T::AccountId: From<[u8; 32]>,163{164	/// @dev Function to check the amount of tokens that an owner allowed to a spender.165	/// @param owner crossAddress The address which owns the funds.166	/// @param spender crossAddress The address which will spend the funds.167	/// @return A uint256 specifying the amount of tokens still available for the spender.168	fn allowance_cross(169		&self,170		owner: pallet_common::eth::CrossAddress,171		spender: pallet_common::eth::CrossAddress,172	) -> Result<U256> {173		let owner = owner.into_sub_cross_account::<T>()?;174		let spender = spender.into_sub_cross_account::<T>()?;175176		Ok(<Allowance<T>>::get((self.id, owner, spender)).into())177	}178179	/// @notice A description for the collection.180	fn description(&self) -> Result<String> {181		Ok(decode_utf16(self.description.iter().copied())182			.map(|r| r.unwrap_or(REPLACEMENT_CHARACTER))183			.collect::<String>())184	}185186	#[weight(<SelfWeightOf<T>>::create_item())]187	fn mint_cross(188		&mut self,189		caller: Caller,190		to: pallet_common::eth::CrossAddress,191		amount: U256,192	) -> Result<bool> {193		let caller = T::CrossAccountId::from_eth(caller);194		let to = to.into_sub_cross_account::<T>()?;195		let amount = amount.try_into().map_err(|_| "amount overflow")?;196		let budget = self197			.recorder198			.weight_calls_budget(<StructureWeight<T>>::find_parent());199		<Pallet<T>>::create_item(&self, &caller, (to, amount), &budget)200			.map_err(dispatch_to_evm::<T>)?;201		Ok(true)202	}203204	#[weight(<SelfWeightOf<T>>::approve())]205	fn approve_cross(206		&mut self,207		caller: Caller,208		spender: pallet_common::eth::CrossAddress,209		amount: U256,210	) -> Result<bool> {211		let caller = T::CrossAccountId::from_eth(caller);212		let spender = spender.into_sub_cross_account::<T>()?;213		let amount = amount.try_into().map_err(|_| "amount overflow")?;214215		<Pallet<T>>::set_allowance(self, &caller, &spender, amount)216			.map_err(dispatch_to_evm::<T>)?;217		Ok(true)218	}219220	/// Burn tokens from account221	/// @dev Function that burns an `amount` of the tokens 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	#[solidity(hide)]226	#[weight(<SelfWeightOf<T>>::burn_from())]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, amount, &budget)236			.map_err(dispatch_to_evm::<T>)?;237		Ok(true)238	}239240	/// Burn tokens from account241	/// @dev Function that burns an `amount` of the tokens of a given account,242	/// deducting from the sender's allowance for said account.243	/// @param from The account whose tokens will be burnt.244	/// @param amount The amount that will be burnt.245	#[weight(<SelfWeightOf<T>>::burn_from())]246	fn burn_from_cross(247		&mut self,248		caller: Caller,249		from: pallet_common::eth::CrossAddress,250		amount: U256,251	) -> Result<bool> {252		let caller = T::CrossAccountId::from_eth(caller);253		let from = from.into_sub_cross_account::<T>()?;254		let amount = amount.try_into().map_err(|_| "amount overflow")?;255		let budget = self256			.recorder257			.weight_calls_budget(<StructureWeight<T>>::find_parent());258259		<Pallet<T>>::burn_from(self, &caller, &from, amount, &budget)260			.map_err(dispatch_to_evm::<T>)?;261		Ok(true)262	}263264	/// Mint tokens for multiple accounts.265	/// @param amounts array of pairs of account address and amount266	#[weight(<SelfWeightOf<T>>::create_multiple_items_ex(amounts.len() as u32))]267	fn mint_bulk(&mut self, caller: Caller, amounts: Vec<(Address, U256)>) -> Result<bool> {268		let caller = T::CrossAccountId::from_eth(caller);269		let budget = self270			.recorder271			.weight_calls_budget(<StructureWeight<T>>::find_parent());272		let amounts = amounts273			.into_iter()274			.map(|(to, amount)| {275				Ok((276					T::CrossAccountId::from_eth(to),277					amount.try_into().map_err(|_| "amount overflow")?,278				))279			})280			.collect::<Result<_>>()?;281282		<Pallet<T>>::create_multiple_items(&self, &caller, amounts, &budget)283			.map_err(dispatch_to_evm::<T>)?;284		Ok(true)285	}286287	#[weight(<SelfWeightOf<T>>::transfer())]288	fn transfer_cross(289		&mut self,290		caller: Caller,291		to: pallet_common::eth::CrossAddress,292		amount: U256,293	) -> Result<bool> {294		let caller = T::CrossAccountId::from_eth(caller);295		let to = to.into_sub_cross_account::<T>()?;296		let amount = amount.try_into().map_err(|_| "amount overflow")?;297		let budget = self298			.recorder299			.weight_calls_budget(<StructureWeight<T>>::find_parent());300301		<Pallet<T>>::transfer(self, &caller, &to, amount, &budget).map_err(|_| "transfer error")?;302		Ok(true)303	}304305	#[weight(<SelfWeightOf<T>>::transfer_from())]306	fn transfer_from_cross(307		&mut self,308		caller: Caller,309		from: pallet_common::eth::CrossAddress,310		to: pallet_common::eth::CrossAddress,311		amount: U256,312	) -> Result<bool> {313		let caller = T::CrossAccountId::from_eth(caller);314		let from = from.into_sub_cross_account::<T>()?;315		let to = to.into_sub_cross_account::<T>()?;316		let amount = amount.try_into().map_err(|_| "amount overflow")?;317		let budget = self318			.recorder319			.weight_calls_budget(<StructureWeight<T>>::find_parent());320321		<Pallet<T>>::transfer_from(self, &caller, &from, &to, amount, &budget)322			.map_err(dispatch_to_evm::<T>)?;323		Ok(true)324	}325326	/// @notice Returns collection helper contract address327	fn collection_helper_address(&self) -> Result<Address> {328		Ok(T::ContractAddress::get())329	}330}331332#[solidity_interface(333	name = UniqueFungible,334	is(335		ERC20,336		ERC20Mintable,337		ERC20UniqueExtensions,338		Collection(via(common_mut returns CollectionHandle<T>)),339	)340)]341impl<T: Config> FungibleHandle<T> where T::AccountId: From<[u8; 32]> + AsRef<[u8; 32]> {}342343generate_stubgen!(gen_impl, UniqueFungibleCall<()>, true);344generate_stubgen!(gen_iface, UniqueFungibleCall<()>, false);345346impl<T: Config> CommonEvmHandler for FungibleHandle<T>347where348	T::AccountId: From<[u8; 32]> + AsRef<[u8; 32]>,349{350	const CODE: &'static [u8] = include_bytes!("./stubs/UniqueFungible.raw");351352	fn call(self, handle: &mut impl PrecompileHandle) -> Option<PrecompileResult> {353		call::<T, UniqueFungibleCall<T>, _, _>(handle, self)354	}355}