git.delta.rocks / unique-network / refs/commits / fa9ccd787b5f

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.2122extern crate alloc;2324#[cfg(not(feature = "std"))]25use alloc::format;2627use core::{28	char::{REPLACEMENT_CHARACTER, decode_utf16},29	convert::TryInto,30	ops::Deref,31};32use evm_coder::{ToLog, execution::*, generate_stubgen, solidity_interface, types::*, weight};33use pallet_common::{34	CommonWeightInfo,35	erc::{CommonEvmHandler, PrecompileResult},36};37use pallet_evm::{account::CrossAccountId, PrecompileHandle};38use pallet_evm_coder_substrate::{call, dispatch_to_evm, WithRecorder};39use pallet_structure::{SelfWeightOf as StructureWeight, weights::WeightInfo as _};40use sp_std::vec::Vec;41use up_data_structs::{mapping::TokenAddressMapping, TokenId};4243use crate::{44	Allowance, Balance, common::CommonWeights, Config, Pallet, RefungibleHandle, SelfWeightOf,45	TotalSupply, weights::WeightInfo,46};4748pub struct RefungibleTokenHandle<T: Config>(pub RefungibleHandle<T>, pub TokenId);4950#[solidity_interface(name = ERC1633)]51impl<T: Config> RefungibleTokenHandle<T> {52	fn parent_token(&self) -> Result<address> {53		self.consume_store_reads(2)?;54		Ok(*T::CrossTokenAddressMapping::token_to_address(self.id, self.1).as_eth())55	}5657	fn parent_token_id(&self) -> Result<uint256> {58		self.consume_store_reads(2)?;59		Ok(self.1.into())60	}61}6263#[derive(ToLog)]64pub enum ERC20Events {65	/// @dev This event is emitted when the amount of tokens (value) is sent66	/// from the from address to the to address. In the case of minting new67	/// tokens, the transfer is usually from the 0 address while in the case68	/// of burning tokens the transfer is to 0.69	Transfer {70		#[indexed]71		from: address,72		#[indexed]73		to: address,74		value: uint256,75	},76	/// @dev This event is emitted when the amount of tokens (value) is approved77	/// by the owner to be used by the spender.78	Approval {79		#[indexed]80		owner: address,81		#[indexed]82		spender: address,83		value: uint256,84	},85}8687/// @title Standard ERC20 token88///89/// @dev Implementation of the basic standard token.90/// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md91#[solidity_interface(name = ERC20, events(ERC20Events))]92impl<T: Config> RefungibleTokenHandle<T> {93	/// @return the name of the token.94	fn name(&self) -> Result<string> {95		Ok(decode_utf16(self.name.iter().copied())96			.map(|r| r.unwrap_or(REPLACEMENT_CHARACTER))97			.collect::<string>())98	}99100	/// @return the symbol of the token.101	fn symbol(&self) -> Result<string> {102		Ok(string::from_utf8_lossy(&self.token_prefix).into())103	}104105	/// @dev Total number of tokens in existence106	fn total_supply(&self) -> Result<uint256> {107		self.consume_store_reads(1)?;108		Ok(<TotalSupply<T>>::get((self.id, self.1)).into())109	}110111	/// @dev Not supported112	fn decimals(&self) -> Result<uint8> {113		// Decimals aren't supported for refungible tokens114		Ok(0)115	}116117	/// @dev Gets the balance of the specified address.118	/// @param owner The address to query the balance of.119	/// @return An uint256 representing the amount owned by the passed address.120	fn balance_of(&self, owner: address) -> Result<uint256> {121		self.consume_store_reads(1)?;122		let owner = T::CrossAccountId::from_eth(owner);123		let balance = <Balance<T>>::get((self.id, self.1, owner));124		Ok(balance.into())125	}126127	/// @dev Transfer token for a specified address128	/// @param to The address to transfer to.129	/// @param amount The amount to be transferred.130	#[weight(<CommonWeights<T>>::transfer())]131	fn transfer(&mut self, caller: caller, to: address, amount: uint256) -> Result<bool> {132		let caller = T::CrossAccountId::from_eth(caller);133		let to = T::CrossAccountId::from_eth(to);134		let amount = amount.try_into().map_err(|_| "amount overflow")?;135		let budget = self136			.recorder137			.weight_calls_budget(<StructureWeight<T>>::find_parent());138139		<Pallet<T>>::transfer(self, &caller, &to, self.1, amount, &budget)140			.map_err(dispatch_to_evm::<T>)?;141		Ok(true)142	}143144	/// @dev Transfer tokens from one address to another145	/// @param from address The address which you want to send tokens from146	/// @param to address The address which you want to transfer to147	/// @param amount uint256 the amount of tokens to be transferred148	#[weight(<CommonWeights<T>>::transfer_from())]149	fn transfer_from(150		&mut self,151		caller: caller,152		from: address,153		to: address,154		amount: uint256,155	) -> Result<bool> {156		let caller = T::CrossAccountId::from_eth(caller);157		let from = T::CrossAccountId::from_eth(from);158		let to = T::CrossAccountId::from_eth(to);159		let amount = amount.try_into().map_err(|_| "amount overflow")?;160		let budget = self161			.recorder162			.weight_calls_budget(<StructureWeight<T>>::find_parent());163164		<Pallet<T>>::transfer_from(self, &caller, &from, &to, self.1, amount, &budget)165			.map_err(dispatch_to_evm::<T>)?;166		Ok(true)167	}168169	/// @dev Approve the passed address to spend the specified amount of tokens on behalf of `msg.sender`.170	/// Beware that changing an allowance with this method brings the risk that someone may use both the old171	/// and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this172	/// race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:173	/// https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729174	/// @param spender The address which will spend the funds.175	/// @param amount The amount of tokens to be spent.176	#[weight(<SelfWeightOf<T>>::approve())]177	fn approve(&mut self, caller: caller, spender: address, amount: uint256) -> Result<bool> {178		let caller = T::CrossAccountId::from_eth(caller);179		let spender = T::CrossAccountId::from_eth(spender);180		let amount = amount.try_into().map_err(|_| "amount overflow")?;181182		<Pallet<T>>::set_allowance(self, &caller, &spender, self.1, amount)183			.map_err(dispatch_to_evm::<T>)?;184		Ok(true)185	}186187	/// @dev Function to check the amount of tokens that an owner allowed to a spender.188	/// @param owner address The address which owns the funds.189	/// @param spender address The address which will spend the funds.190	/// @return A uint256 specifying the amount of tokens still available for the spender.191	fn allowance(&self, owner: address, spender: address) -> Result<uint256> {192		self.consume_store_reads(1)?;193		let owner = T::CrossAccountId::from_eth(owner);194		let spender = T::CrossAccountId::from_eth(spender);195196		Ok(<Allowance<T>>::get((self.id, self.1, owner, spender)).into())197	}198}199200#[solidity_interface(name = ERC20UniqueExtensions)]201impl<T: Config> RefungibleTokenHandle<T> {202	/// @dev Function that burns an amount of the token of a given account,203	/// deducting from the sender's allowance for said account.204	/// @param from The account whose tokens will be burnt.205	/// @param amount The amount that will be burnt.206	#[weight(<SelfWeightOf<T>>::burn_from())]207	fn burn_from(&mut self, caller: caller, from: address, amount: uint256) -> Result<bool> {208		let caller = T::CrossAccountId::from_eth(caller);209		let from = T::CrossAccountId::from_eth(from);210		let amount = amount.try_into().map_err(|_| "amount overflow")?;211		let budget = self212			.recorder213			.weight_calls_budget(<StructureWeight<T>>::find_parent());214215		<Pallet<T>>::burn_from(self, &caller, &from, self.1, amount, &budget)216			.map_err(dispatch_to_evm::<T>)?;217		Ok(true)218	}219220	/// @dev Function that changes total amount of the tokens.221	///  Throws if `msg.sender` doesn't owns all of the tokens.222	/// @param amount New total amount of the tokens.223	#[weight(<SelfWeightOf<T>>::repartition_item())]224	fn repartition(&mut self, caller: caller, amount: uint256) -> Result<bool> {225		let caller = T::CrossAccountId::from_eth(caller);226		let amount = amount.try_into().map_err(|_| "amount overflow")?;227228		<Pallet<T>>::repartition(self, &caller, self.1, amount).map_err(dispatch_to_evm::<T>)?;229		Ok(true)230	}231}232233impl<T: Config> RefungibleTokenHandle<T> {234	pub fn into_inner(self) -> RefungibleHandle<T> {235		self.0236	}237	pub fn common_mut(&mut self) -> &mut RefungibleHandle<T> {238		&mut self.0239	}240}241242impl<T: Config> WithRecorder<T> for RefungibleTokenHandle<T> {243	fn recorder(&self) -> &pallet_evm_coder_substrate::SubstrateRecorder<T> {244		self.0.recorder()245	}246	fn into_recorder(self) -> pallet_evm_coder_substrate::SubstrateRecorder<T> {247		self.0.into_recorder()248	}249}250251impl<T: Config> Deref for RefungibleTokenHandle<T> {252	type Target = RefungibleHandle<T>;253254	fn deref(&self) -> &Self::Target {255		&self.0256	}257}258259#[solidity_interface(260	name = UniqueRefungibleToken,261	is(ERC20, ERC20UniqueExtensions, ERC1633)262)]263impl<T: Config> RefungibleTokenHandle<T> where T::AccountId: From<[u8; 32]> {}264265generate_stubgen!(gen_impl, UniqueRefungibleTokenCall<()>, true);266generate_stubgen!(gen_iface, UniqueRefungibleTokenCall<()>, false);267268impl<T: Config> CommonEvmHandler for RefungibleTokenHandle<T>269where270	T::AccountId: From<[u8; 32]>,271{272	const CODE: &'static [u8] = include_bytes!("./stubs/UniqueRefungibleToken.raw");273274	fn call(self, handle: &mut impl PrecompileHandle) -> Option<PrecompileResult> {275		call::<T, UniqueRefungibleTokenCall<T>, _, _>(handle, self)276	}277}