git.delta.rocks / unique-network / refs/commits / e2559ac16227

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//! The module contains a number of functions for converting and checking ethereum identifiers.1819use evm_coder::{20	AbiCoder,21	types::{uint256, address},22};23pub use pallet_evm::{Config, account::CrossAccountId};24use sp_core::H160;25use up_data_structs::CollectionId;2627// 0x17c4e6453Cc49AAAaEACA894e6D9683e00000001 - collection 128// TODO: Unhardcode prefix29const ETH_COLLECTION_PREFIX: [u8; 16] = [30	0x17, 0xc4, 0xe6, 0x45, 0x3c, 0xc4, 0x9a, 0xaa, 0xae, 0xac, 0xa8, 0x94, 0xe6, 0xd9, 0x68, 0x3e,31];3233/// Maps the ethereum address of the collection in substrate.34pub fn map_eth_to_id(eth: &H160) -> Option<CollectionId> {35	if eth[0..16] != ETH_COLLECTION_PREFIX {36		return None;37	}38	let mut id_bytes = [0; 4];39	id_bytes.copy_from_slice(&eth[16..20]);40	Some(CollectionId(u32::from_be_bytes(id_bytes)))41}4243/// Maps the substrate collection id in ethereum.44pub fn collection_id_to_address(id: CollectionId) -> H160 {45	let mut out = [0; 20];46	out[0..16].copy_from_slice(&ETH_COLLECTION_PREFIX);47	out[16..20].copy_from_slice(&u32::to_be_bytes(id.0));48	H160(out)49}5051/// Check if the ethereum address is a collection.52pub fn is_collection(address: &H160) -> bool {53	address[0..16] == ETH_COLLECTION_PREFIX54}5556/// Convert `CrossAccountId` to `uint256`.57pub fn convert_cross_account_to_uint256<T: Config>(from: &T::CrossAccountId) -> uint25658where59	T::AccountId: AsRef<[u8; 32]>,60{61	let slice = from.as_sub().as_ref();62	uint256::from_big_endian(slice)63}6465/// Convert `uint256` to `CrossAccountId`.66pub fn convert_uint256_to_cross_account<T: Config>(from: uint256) -> T::CrossAccountId67where68	T::AccountId: From<[u8; 32]>,69{70	let mut new_admin_arr = [0_u8; 32];71	from.to_big_endian(&mut new_admin_arr);72	let account_id = T::AccountId::from(new_admin_arr);73	T::CrossAccountId::from_sub(account_id)74}7576/// Convert `CrossAccountId` to `(address, uint256)`.77pub fn convert_cross_account_to_tuple<T: Config>(78	cross_account_id: &T::CrossAccountId,79) -> (address, uint256)80where81	T::AccountId: AsRef<[u8; 32]>,82{83	if cross_account_id.is_canonical_substrate() {84		let sub = convert_cross_account_to_uint256::<T>(cross_account_id);85		(Default::default(), sub)86	} else {87		let eth = *cross_account_id.as_eth();88		(eth, Default::default())89	}90}9192/// Convert tuple `(address, uint256)` to `CrossAccountId`.93///94/// If `address` in the tuple has *default* value, then the canonical form is substrate,95/// if `uint256` has *default* value, then the ethereum form is canonical,96/// if both values are *default* or *non default*, then this is considered an invalid address and `Error` is returned.97pub fn convert_tuple_to_cross_account<T: Config>(98	eth_cross_account_id: (address, uint256),99) -> evm_coder::execution::Result<T::CrossAccountId>100where101	T::AccountId: From<[u8; 32]>,102{103	if eth_cross_account_id == Default::default() {104		Err("All fields of cross account is zeroed".into())105	} else if eth_cross_account_id.0 == Default::default() {106		Ok(convert_uint256_to_cross_account::<T>(107			eth_cross_account_id.1,108		))109	} else if eth_cross_account_id.1 == Default::default() {110		Ok(T::CrossAccountId::from_eth(eth_cross_account_id.0))111	} else {112		Err("All fields of cross account is non zeroed".into())113	}114}115116#[derive(Debug, Default, AbiCoder)]117pub struct EthCrossAccount {118	pub(crate) eth: address,119	pub(crate) sub: uint256,120}121122impl EthCrossAccount {123	pub fn from_sub_cross_account<T>(cross_account_id: &T::CrossAccountId) -> Self124	where125		T: pallet_evm::account::Config,126		T::AccountId: AsRef<[u8; 32]>,127	{128		if cross_account_id.is_canonical_substrate() {129			Self {130				eth: Default::default(),131				sub: convert_cross_account_to_uint256::<T>(cross_account_id),132			}133		} else {134			Self {135				eth: *cross_account_id.as_eth(),136				sub: Default::default(),137			}138		}139	}140141	pub fn into_sub_cross_account<T>(&self) -> evm_coder::execution::Result<T::CrossAccountId>142	where143		T: pallet_evm::account::Config,144		T::AccountId: From<[u8; 32]>,145	{146		if self.eth == Default::default() && self.sub == Default::default() {147			Err("All fields of cross account is zeroed".into())148		} else if self.eth == Default::default() {149			Ok(convert_uint256_to_cross_account::<T>(self.sub))150		} else if self.sub == Default::default() {151			Ok(T::CrossAccountId::from_eth(self.eth))152		} else {153			Err("All fields of cross account is non zeroed".into())154		}155	}156}157158#[cfg(feature = "stubgen")]159impl ::evm_coder::solidity::sealed::CanBePlacedInVec for EthCrossAccount {}160161#[cfg(feature = "stubgen")]162impl ::evm_coder::solidity::SolidityTupleType for EthCrossAccount {163	fn names(tc: &::evm_coder::solidity::TypeCollector) -> Vec<String> {164		let mut collected =165			Vec::with_capacity(<Self as ::evm_coder::solidity::SolidityTupleType>::len());166		{167			let mut out = String::new();168			<address as ::evm_coder::solidity::SolidityTypeName>::solidity_name(&mut out, tc)169				.expect("no fmt error");170			collected.push(out);171		}172		{173			let mut out = String::new();174			<uint256 as ::evm_coder::solidity::SolidityTypeName>::solidity_name(&mut out, tc)175				.expect("no fmt error");176			collected.push(out);177		}178		collected179	}180181	fn len() -> usize {182		2183	}184}185186#[cfg(feature = "stubgen")]187impl ::evm_coder::solidity::SolidityTypeName for EthCrossAccount {188	fn solidity_name(189		writer: &mut impl ::core::fmt::Write,190		tc: &::evm_coder::solidity::TypeCollector,191	) -> ::core::fmt::Result {192		write!(writer, "{}", tc.collect_struct::<Self>())193	}194195	fn is_simple() -> bool {196		false197	}198199	fn solidity_default(200		writer: &mut impl ::core::fmt::Write,201		tc: &::evm_coder::solidity::TypeCollector,202	) -> ::core::fmt::Result {203		write!(writer, "{}(", tc.collect_struct::<Self>())?;204		address::solidity_default(writer, tc)?;205		write!(writer, ",")?;206		uint256::solidity_default(writer, tc)?;207		write!(writer, ")")208	}209}210211#[cfg(feature = "stubgen")]212impl ::evm_coder::solidity::StructCollect for EthCrossAccount {213	fn name() -> String {214		"EthCrossAccount".into()215	}216217	fn declaration() -> String {218		use std::fmt::Write;219220		let mut str = String::new();221		writeln!(str, "/// @dev Cross account struct").unwrap();222		writeln!(str, "struct {} {{", Self::name()).unwrap();223		writeln!(str, "\taddress eth;").unwrap();224		writeln!(str, "\tuint256 sub;").unwrap();225		writeln!(str, "}}").unwrap();226		str227	}228}