git.delta.rocks / unique-network / refs/commits / b6f32fd78e2b

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pallets/fungible/src/erc.rs3.9 KiBsourcehistory
1use core::char::{REPLACEMENT_CHARACTER, decode_utf16};2use core::convert::TryInto;3use evm_coder::{ToLog, execution::*, generate_stubgen, solidity_interface, types::*};4use nft_data_structs::CollectionMode;5use pallet_common::erc::CommonEvmHandler;6use sp_core::{H160, U256};7use sp_std::vec::Vec;8use pallet_common::account::CrossAccountId;9use pallet_common::erc::PrecompileOutput;10use pallet_evm_coder_substrate::{call_internal, dispatch_to_evm};1112use crate::{Allowance, Balance, Config, FungibleHandle, Pallet, TotalSupply};1314#[derive(ToLog)]15pub enum ERC20Events {16	Transfer {17		#[indexed]18		from: address,19		#[indexed]20		to: address,21		value: uint256,22	},23	Approval {24		#[indexed]25		owner: address,26		#[indexed]27		spender: address,28		value: uint256,29	},30}3132#[solidity_interface(name = "ERC20", events(ERC20Events))]33impl<T: Config> FungibleHandle<T> {34	fn name(&self) -> Result<string> {35		Ok(decode_utf16(self.name.iter().copied())36			.map(|r| r.unwrap_or(REPLACEMENT_CHARACTER))37			.collect::<string>())38	}39	fn symbol(&self) -> Result<string> {40		Ok(string::from_utf8_lossy(&self.token_prefix).into())41	}42	fn total_supply(&self) -> Result<uint256> {43		Ok(<TotalSupply<T>>::get(self.id).into())44	}4546	fn decimals(&self) -> Result<uint8> {47		Ok(if let CollectionMode::Fungible(decimals) = &self.mode {48			*decimals49		} else {50			unreachable!()51		})52	}53	fn balance_of(&self, owner: address) -> Result<uint256> {54		let owner = T::CrossAccountId::from_eth(owner);55		let balance = <Balance<T>>::get((self.id, owner));56		Ok(balance.into())57	}58	fn transfer(&mut self, caller: caller, to: address, amount: uint256) -> Result<bool> {59		let caller = T::CrossAccountId::from_eth(caller);60		let to = T::CrossAccountId::from_eth(to);61		let amount = amount.try_into().map_err(|_| "amount overflow")?;6263		<Pallet<T>>::transfer(self, &caller, &to, amount).map_err(|_| "transfer error")?;64		Ok(true)65	}66	fn transfer_from(67		&mut self,68		caller: caller,69		from: address,70		to: address,71		amount: uint256,72	) -> Result<bool> {73		let caller = T::CrossAccountId::from_eth(caller);74		let from = T::CrossAccountId::from_eth(from);75		let to = T::CrossAccountId::from_eth(to);76		let amount = amount.try_into().map_err(|_| "amount overflow")?;7778		<Pallet<T>>::transfer_from(self, &caller, &from, &to, amount)79			.map_err(dispatch_to_evm::<T>)?;80		Ok(true)81	}82	fn approve(&mut self, caller: caller, spender: address, amount: uint256) -> Result<bool> {83		let caller = T::CrossAccountId::from_eth(caller);84		let spender = T::CrossAccountId::from_eth(spender);85		let amount = amount.try_into().map_err(|_| "amount overflow")?;8687		<Pallet<T>>::set_allowance(self, &caller, &spender, amount)88			.map_err(dispatch_to_evm::<T>)?;89		Ok(true)90	}91	fn allowance(&self, owner: address, spender: address) -> Result<uint256> {92		let owner = T::CrossAccountId::from_eth(owner);93		let spender = T::CrossAccountId::from_eth(spender);9495		Ok(<Allowance<T>>::get((self.id, owner, spender)).into())96	}97}9899#[solidity_interface(name = "ERC20UniqueExtensions")]100impl<T: Config> FungibleHandle<T> {101	fn burn_from(&mut self, caller: caller, from: address, amount: uint256) -> Result<bool> {102		let caller = T::CrossAccountId::from_eth(caller);103		let from = T::CrossAccountId::from_eth(from);104		let amount = amount.try_into().map_err(|_| "amount overflow")?;105106		<Pallet<T>>::burn_from(self, &caller, &from, amount).map_err(dispatch_to_evm::<T>)?;107		Ok(true)108	}109}110111#[solidity_interface(name = "UniqueFungible", is(ERC20))]112impl<T: Config> FungibleHandle<T> {}113114generate_stubgen!(gen_impl, UniqueFungibleCall, true);115generate_stubgen!(gen_iface, UniqueFungibleCall, false);116117impl<T: Config> CommonEvmHandler for FungibleHandle<T> {118	const CODE: &'static [u8] = include_bytes!("./stubs/UniqueFungible.raw");119120	fn call(mut self, source: &H160, input: &[u8], value: U256) -> Option<PrecompileOutput> {121		let result = call_internal::<UniqueFungibleCall, _>(*source, &mut self, value, input);122		self.0.recorder.evm_to_precompile_output(result)123	}124}