git.delta.rocks / unique-network / refs/commits / 12eee8195c76

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/// Cross account struct117#[derive(Debug, Default, AbiCoder)]118pub struct EthCrossAccount {119	pub(crate) eth: address,120	pub(crate) sub: uint256,121}122123impl EthCrossAccount {124	pub fn from_sub_cross_account<T>(cross_account_id: &T::CrossAccountId) -> Self125	where126		T: pallet_evm::account::Config,127		T::AccountId: AsRef<[u8; 32]>,128	{129		if cross_account_id.is_canonical_substrate() {130			Self {131				eth: Default::default(),132				sub: convert_cross_account_to_uint256::<T>(cross_account_id),133			}134		} else {135			Self {136				eth: *cross_account_id.as_eth(),137				sub: Default::default(),138			}139		}140	}141142	pub fn into_sub_cross_account<T>(&self) -> evm_coder::execution::Result<T::CrossAccountId>143	where144		T: pallet_evm::account::Config,145		T::AccountId: From<[u8; 32]>,146	{147		if self.eth == Default::default() && self.sub == Default::default() {148			Err("All fields of cross account is zeroed".into())149		} else if self.eth == Default::default() {150			Ok(convert_uint256_to_cross_account::<T>(self.sub))151		} else if self.sub == Default::default() {152			Ok(T::CrossAccountId::from_eth(self.eth))153		} else {154			Err("All fields of cross account is non zeroed".into())155		}156	}157}