git.delta.rocks / unique-network / refs/commits / 35f818f58d56

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))]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	}138139	/// @notice Returns collection helper contract address140	fn collection_helper_address(&self) -> Result<Address> {141		Ok(T::ContractAddress::get())142	}143}144145#[solidity_interface(name = ERC20Mintable)]146impl<T: Config> FungibleHandle<T> {147	/// Mint tokens for `to` account.148	/// @param to account that will receive minted tokens149	/// @param amount amount of tokens to mint150	#[weight(<SelfWeightOf<T>>::create_item())]151	fn mint(&mut self, caller: Caller, to: Address, amount: U256) -> Result<bool> {152		let caller = T::CrossAccountId::from_eth(caller);153		let to = T::CrossAccountId::from_eth(to);154		let amount = amount.try_into().map_err(|_| "amount overflow")?;155		let budget = self156			.recorder157			.weight_calls_budget(<StructureWeight<T>>::find_parent());158		<Pallet<T>>::create_item(&self, &caller, (to, amount), &budget)159			.map_err(dispatch_to_evm::<T>)?;160		Ok(true)161	}162}163164#[solidity_interface(name = ERC20UniqueExtensions)]165impl<T: Config> FungibleHandle<T>166where167	T::AccountId: From<[u8; 32]>,168{169	/// @notice A description for the collection.170	fn description(&self) -> Result<String> {171		Ok(decode_utf16(self.description.iter().copied())172			.map(|r| r.unwrap_or(REPLACEMENT_CHARACTER))173			.collect::<String>())174	}175176	#[weight(<SelfWeightOf<T>>::create_item())]177	fn mint_cross(178		&mut self,179		caller: Caller,180		to: pallet_common::eth::CrossAddress,181		amount: U256,182	) -> Result<bool> {183		let caller = T::CrossAccountId::from_eth(caller);184		let to = to.into_sub_cross_account::<T>()?;185		let amount = amount.try_into().map_err(|_| "amount overflow")?;186		let budget = self187			.recorder188			.weight_calls_budget(<StructureWeight<T>>::find_parent());189		<Pallet<T>>::create_item(&self, &caller, (to, amount), &budget)190			.map_err(dispatch_to_evm::<T>)?;191		Ok(true)192	}193194	#[weight(<SelfWeightOf<T>>::approve())]195	fn approve_cross(196		&mut self,197		caller: Caller,198		spender: pallet_common::eth::CrossAddress,199		amount: U256,200	) -> Result<bool> {201		let caller = T::CrossAccountId::from_eth(caller);202		let spender = spender.into_sub_cross_account::<T>()?;203		let amount = amount.try_into().map_err(|_| "amount overflow")?;204205		<Pallet<T>>::set_allowance(self, &caller, &spender, amount)206			.map_err(dispatch_to_evm::<T>)?;207		Ok(true)208	}209210	/// Burn tokens from account211	/// @dev Function that burns an `amount` of the tokens of a given account,212	/// deducting from the sender's allowance for said account.213	/// @param from The account whose tokens will be burnt.214	/// @param amount The amount that will be burnt.215	#[solidity(hide)]216	#[weight(<SelfWeightOf<T>>::burn_from())]217	fn burn_from(&mut self, caller: Caller, from: Address, amount: U256) -> Result<bool> {218		let caller = T::CrossAccountId::from_eth(caller);219		let from = T::CrossAccountId::from_eth(from);220		let amount = amount.try_into().map_err(|_| "amount overflow")?;221		let budget = self222			.recorder223			.weight_calls_budget(<StructureWeight<T>>::find_parent());224225		<Pallet<T>>::burn_from(self, &caller, &from, amount, &budget)226			.map_err(dispatch_to_evm::<T>)?;227		Ok(true)228	}229230	/// Burn tokens from account231	/// @dev Function that burns an `amount` of the tokens of a given account,232	/// deducting from the sender's allowance for said account.233	/// @param from The account whose tokens will be burnt.234	/// @param amount The amount that will be burnt.235	#[weight(<SelfWeightOf<T>>::burn_from())]236	fn burn_from_cross(237		&mut self,238		caller: Caller,239		from: pallet_common::eth::CrossAddress,240		amount: U256,241	) -> Result<bool> {242		let caller = T::CrossAccountId::from_eth(caller);243		let from = from.into_sub_cross_account::<T>()?;244		let amount = amount.try_into().map_err(|_| "amount overflow")?;245		let budget = self246			.recorder247			.weight_calls_budget(<StructureWeight<T>>::find_parent());248249		<Pallet<T>>::burn_from(self, &caller, &from, amount, &budget)250			.map_err(dispatch_to_evm::<T>)?;251		Ok(true)252	}253254	/// Mint tokens for multiple accounts.255	/// @param amounts array of pairs of account address and amount256	#[weight(<SelfWeightOf<T>>::create_multiple_items_ex(amounts.len() as u32))]257	fn mint_bulk(&mut self, caller: Caller, amounts: Vec<(Address, U256)>) -> Result<bool> {258		let caller = T::CrossAccountId::from_eth(caller);259		let budget = self260			.recorder261			.weight_calls_budget(<StructureWeight<T>>::find_parent());262		let amounts = amounts263			.into_iter()264			.map(|(to, amount)| {265				Ok((266					T::CrossAccountId::from_eth(to),267					amount.try_into().map_err(|_| "amount overflow")?,268				))269			})270			.collect::<Result<_>>()?;271272		<Pallet<T>>::create_multiple_items(&self, &caller, amounts, &budget)273			.map_err(dispatch_to_evm::<T>)?;274		Ok(true)275	}276277	#[weight(<SelfWeightOf<T>>::transfer())]278	fn transfer_cross(279		&mut self,280		caller: Caller,281		to: pallet_common::eth::CrossAddress,282		amount: U256,283	) -> Result<bool> {284		let caller = T::CrossAccountId::from_eth(caller);285		let to = to.into_sub_cross_account::<T>()?;286		let amount = amount.try_into().map_err(|_| "amount overflow")?;287		let budget = self288			.recorder289			.weight_calls_budget(<StructureWeight<T>>::find_parent());290291		<Pallet<T>>::transfer(self, &caller, &to, amount, &budget).map_err(|_| "transfer error")?;292		Ok(true)293	}294295	#[weight(<SelfWeightOf<T>>::transfer_from())]296	fn transfer_from_cross(297		&mut self,298		caller: Caller,299		from: pallet_common::eth::CrossAddress,300		to: pallet_common::eth::CrossAddress,301		amount: U256,302	) -> Result<bool> {303		let caller = T::CrossAccountId::from_eth(caller);304		let from = from.into_sub_cross_account::<T>()?;305		let to = to.into_sub_cross_account::<T>()?;306		let amount = amount.try_into().map_err(|_| "amount overflow")?;307		let budget = self308			.recorder309			.weight_calls_budget(<StructureWeight<T>>::find_parent());310311		<Pallet<T>>::transfer_from(self, &caller, &from, &to, amount, &budget)312			.map_err(dispatch_to_evm::<T>)?;313		Ok(true)314	}315}316317#[solidity_interface(318	name = UniqueFungible,319	is(320		ERC20,321		ERC20Mintable,322		ERC20UniqueExtensions,323		Collection(via(common_mut returns CollectionHandle<T>)),324	)325)]326impl<T: Config> FungibleHandle<T> where T::AccountId: From<[u8; 32]> + AsRef<[u8; 32]> {}327328generate_stubgen!(gen_impl, UniqueFungibleCall<()>, true);329generate_stubgen!(gen_iface, UniqueFungibleCall<()>, false);330331impl<T: Config> CommonEvmHandler for FungibleHandle<T>332where333	T::AccountId: From<[u8; 32]> + AsRef<[u8; 32]>,334{335	const CODE: &'static [u8] = include_bytes!("./stubs/UniqueFungible.raw");336337	fn call(self, handle: &mut impl PrecompileHandle) -> Option<PrecompileResult> {338		call::<T, UniqueFungibleCall<T>, _, _>(handle, self)339	}340}