git.delta.rocks / unique-network / refs/commits / 2e0d1a668d33

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::erc::{CommonEvmHandler, PrecompileResult};28use sp_std::vec::Vec;29use pallet_evm::{account::CrossAccountId, PrecompileHandle};30use pallet_evm_coder_substrate::{call, dispatch_to_evm};31use pallet_structure::{SelfWeightOf as StructureWeight, weights::WeightInfo as _};32use pallet_common::{CollectionHandle, erc::CollectionCall};3334use crate::{35	Allowance, Balance, Config, FungibleHandle, Pallet, SelfWeightOf, TotalSupply,36	weights::WeightInfo,37};3839#[derive(ToLog)]40pub enum ERC20Events {41	Transfer {42		#[indexed]43		from: address,44		#[indexed]45		to: address,46		value: uint256,47	},48	Approval {49		#[indexed]50		owner: address,51		#[indexed]52		spender: address,53		value: uint256,54	},55}5657#[solidity_interface(name = ERC20, events(ERC20Events))]58impl<T: Config> FungibleHandle<T> {59	fn name(&self) -> Result<string> {60		Ok(decode_utf16(self.name.iter().copied())61			.map(|r| r.unwrap_or(REPLACEMENT_CHARACTER))62			.collect::<string>())63	}64	fn symbol(&self) -> Result<string> {65		Ok(string::from_utf8_lossy(&self.token_prefix).into())66	}67	fn total_supply(&self) -> Result<uint256> {68		self.consume_store_reads(1)?;69		Ok(<TotalSupply<T>>::get(self.id).into())70	}7172	fn decimals(&self) -> Result<uint8> {73		Ok(if let CollectionMode::Fungible(decimals) = &self.mode {74			*decimals75		} else {76			unreachable!()77		})78	}79	fn balance_of(&self, owner: address) -> Result<uint256> {80		self.consume_store_reads(1)?;81		let owner = T::CrossAccountId::from_eth(owner);82		let balance = <Balance<T>>::get((self.id, owner));83		Ok(balance.into())84	}85	#[weight(<SelfWeightOf<T>>::transfer())]86	fn transfer(&mut self, caller: caller, to: address, amount: uint256) -> Result<bool> {87		let caller = T::CrossAccountId::from_eth(caller);88		let to = T::CrossAccountId::from_eth(to);89		let amount = amount.try_into().map_err(|_| "amount overflow")?;90		let budget = self91			.recorder92			.weight_calls_budget(<StructureWeight<T>>::find_parent());9394		<Pallet<T>>::transfer(self, &caller, &to, amount, &budget).map_err(|_| "transfer error")?;95		Ok(true)96	}9798	#[weight(<SelfWeightOf<T>>::transfer_from())]99	fn transfer_from(100		&mut self,101		caller: caller,102		from: address,103		to: address,104		amount: uint256,105	) -> Result<bool> {106		let caller = T::CrossAccountId::from_eth(caller);107		let from = T::CrossAccountId::from_eth(from);108		let to = T::CrossAccountId::from_eth(to);109		let amount = amount.try_into().map_err(|_| "amount overflow")?;110		let budget = self111			.recorder112			.weight_calls_budget(<StructureWeight<T>>::find_parent());113114		<Pallet<T>>::transfer_from(self, &caller, &from, &to, amount, &budget)115			.map_err(dispatch_to_evm::<T>)?;116		Ok(true)117	}118	#[weight(<SelfWeightOf<T>>::approve())]119	fn approve(&mut self, caller: caller, spender: address, amount: uint256) -> Result<bool> {120		let caller = T::CrossAccountId::from_eth(caller);121		let spender = T::CrossAccountId::from_eth(spender);122		let amount = amount.try_into().map_err(|_| "amount overflow")?;123124		<Pallet<T>>::set_allowance(self, &caller, &spender, amount)125			.map_err(dispatch_to_evm::<T>)?;126		Ok(true)127	}128	fn allowance(&self, owner: address, spender: address) -> Result<uint256> {129		self.consume_store_reads(1)?;130		let owner = T::CrossAccountId::from_eth(owner);131		let spender = T::CrossAccountId::from_eth(spender);132133		Ok(<Allowance<T>>::get((self.id, owner, spender)).into())134	}135}136137#[solidity_interface(name = ERC20Mintable)]138impl<T: Config> FungibleHandle<T> {139	/// Mint tokens for `to` account.140	/// @param to account that will receive minted tokens141	/// @param amount amount of tokens to mint142	#[weight(<SelfWeightOf<T>>::create_item())]143	fn mint(&mut self, caller: caller, to: address, amount: uint256) -> Result<bool> {144		let caller = T::CrossAccountId::from_eth(caller);145		let to = T::CrossAccountId::from_eth(to);146		let amount = amount.try_into().map_err(|_| "amount overflow")?;147		let budget = self148			.recorder149			.weight_calls_budget(<StructureWeight<T>>::find_parent());150		<Pallet<T>>::create_item(&self, &caller, (to, amount), &budget)151			.map_err(dispatch_to_evm::<T>)?;152		Ok(true)153	}154}155156#[solidity_interface(name = ERC20UniqueExtensions)]157impl<T: Config> FungibleHandle<T>158where159	T::AccountId: From<[u8; 32]>,160{161	#[weight(<SelfWeightOf<T>>::approve())]162	fn approve_cross(163		&mut self,164		caller: caller,165		spender: EthCrossAccount,166		amount: uint256,167	) -> Result<bool> {168		let caller = T::CrossAccountId::from_eth(caller);169		let spender = spender.into_sub_cross_account::<T>()?;170		let amount = amount.try_into().map_err(|_| "amount overflow")?;171172		<Pallet<T>>::set_allowance(self, &caller, &spender, amount)173			.map_err(dispatch_to_evm::<T>)?;174		Ok(true)175	}176177	/// Burn tokens from account178	/// @dev Function that burns an `amount` of the tokens of a given account,179	/// deducting from the sender's allowance for said account.180	/// @param from The account whose tokens will be burnt.181	/// @param amount The amount that will be burnt.182	#[solidity(hide)]183	#[weight(<SelfWeightOf<T>>::burn_from())]184	fn burn_from(&mut self, caller: caller, from: address, amount: uint256) -> Result<bool> {185		let caller = T::CrossAccountId::from_eth(caller);186		let from = T::CrossAccountId::from_eth(from);187		let amount = amount.try_into().map_err(|_| "amount overflow")?;188		let budget = self189			.recorder190			.weight_calls_budget(<StructureWeight<T>>::find_parent());191192		<Pallet<T>>::burn_from(self, &caller, &from, amount, &budget)193			.map_err(dispatch_to_evm::<T>)?;194		Ok(true)195	}196197	/// Burn tokens from account198	/// @dev Function that burns an `amount` of the tokens of a given account,199	/// deducting from the sender's allowance for said account.200	/// @param from The account whose tokens will be burnt.201	/// @param amount The amount that will be burnt.202	#[weight(<SelfWeightOf<T>>::burn_from())]203	fn burn_from_cross(204		&mut self,205		caller: caller,206		from: EthCrossAccount,207		amount: uint256,208	) -> Result<bool> {209		let caller = T::CrossAccountId::from_eth(caller);210		let from = from.into_sub_cross_account::<T>()?;211		let amount = amount.try_into().map_err(|_| "amount overflow")?;212		let budget = self213			.recorder214			.weight_calls_budget(<StructureWeight<T>>::find_parent());215216		<Pallet<T>>::burn_from(self, &caller, &from, amount, &budget)217			.map_err(dispatch_to_evm::<T>)?;218		Ok(true)219	}220221	/// Mint tokens for multiple accounts.222	/// @param amounts array of pairs of account address and amount223	#[weight(<SelfWeightOf<T>>::create_multiple_items_ex(amounts.len() as u32))]224	fn mint_bulk(&mut self, caller: caller, amounts: Vec<(address, uint256)>) -> Result<bool> {225		let caller = T::CrossAccountId::from_eth(caller);226		let budget = self227			.recorder228			.weight_calls_budget(<StructureWeight<T>>::find_parent());229		let amounts = amounts230			.into_iter()231			.map(|(to, amount)| {232				Ok((233					T::CrossAccountId::from_eth(to),234					amount.try_into().map_err(|_| "amount overflow")?,235				))236			})237			.collect::<Result<_>>()?;238239		<Pallet<T>>::create_multiple_items(&self, &caller, amounts, &budget)240			.map_err(dispatch_to_evm::<T>)?;241		Ok(true)242	}243244	#[weight(<SelfWeightOf<T>>::transfer())]245	fn transfer_cross(246		&mut self,247		caller: caller,248		to: EthCrossAccount,249		amount: uint256,250	) -> Result<bool> {251		let caller = T::CrossAccountId::from_eth(caller);252		let to = to.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>>::transfer(self, &caller, &to, amount, &budget).map_err(|_| "transfer error")?;259		Ok(true)260	}261262	#[weight(<SelfWeightOf<T>>::transfer_from())]263	fn transfer_from_cross(264		&mut self,265		caller: caller,266		from: EthCrossAccount,267		to: EthCrossAccount,268		amount: uint256,269	) -> Result<bool> {270		let caller = T::CrossAccountId::from_eth(caller);271		let from = from.into_sub_cross_account::<T>()?;272		let to = to.into_sub_cross_account::<T>()?;273		let amount = amount.try_into().map_err(|_| "amount overflow")?;274		let budget = self275			.recorder276			.weight_calls_budget(<StructureWeight<T>>::find_parent());277278		<Pallet<T>>::transfer_from(self, &caller, &from, &to, amount, &budget)279			.map_err(dispatch_to_evm::<T>)?;280		Ok(true)281	}282}283284#[solidity_interface(285	name = UniqueFungible,286	is(287		ERC20,288		ERC20Mintable,289		ERC20UniqueExtensions,290		Collection(via(common_mut returns CollectionHandle<T>)),291	)292)]293impl<T: Config> FungibleHandle<T> where T::AccountId: From<[u8; 32]> + AsRef<[u8; 32]> {}294295generate_stubgen!(gen_impl, UniqueFungibleCall<()>, true);296generate_stubgen!(gen_iface, UniqueFungibleCall<()>, false);297298impl<T: Config> CommonEvmHandler for FungibleHandle<T>299where300	T::AccountId: From<[u8; 32]> + AsRef<[u8; 32]>,301{302	const CODE: &'static [u8] = include_bytes!("./stubs/UniqueFungible.raw");303304	fn call(self, handle: &mut impl PrecompileHandle) -> Option<PrecompileResult> {305		call::<T, UniqueFungibleCall<T>, _, _>(handle, self)306	}307}