git.delta.rocks / unique-network / refs/commits / 2dfd73643010

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//! Implements EVM sponsoring logic via OnChargeEVMTransaction1819use crate::{Config, sponsorship::*};20use evm_coder::{Call, abi::AbiReader};21use pallet_common::{CollectionHandle, eth::map_eth_to_id};22use sp_core::H160;23use sp_std::prelude::*;24use up_sponsorship::SponsorshipHandler;25use core::marker::PhantomData;26use core::convert::TryInto;27use up_data_structs::TokenId;28use up_evm_mapping::EvmBackwardsAddressMapping;29use pallet_common::account::CrossAccountId;3031use pallet_nonfungible::erc::{UniqueNFTCall, ERC721UniqueExtensionsCall, ERC721Call};32use pallet_fungible::erc::{UniqueFungibleCall, ERC20Call};3334pub struct UniqueEthSponsorshipHandler<T: Config>(PhantomData<*const T>);35impl<T: Config> SponsorshipHandler<H160, (H160, Vec<u8>)> for UniqueEthSponsorshipHandler<T> {36	fn get_sponsor(who: &H160, call: &(H160, Vec<u8>)) -> Option<H160> {37		let collection_id = map_eth_to_id(&call.0)?;38		let collection = <CollectionHandle<T>>::new(collection_id)?;39		let sponsor = collection.sponsorship.sponsor()?.clone();40		let sponsor =41			<T as pallet_common::Config>::EvmBackwardsAddressMapping::from_account_id(sponsor);42		let who = T::CrossAccountId::from_eth(*who);43		let (method_id, mut reader) = AbiReader::new_call(&call.1).ok()?;44		match &collection.mode {45			crate::CollectionMode::NFT => {46				let call = <UniqueNFTCall<T>>::parse(method_id, &mut reader).ok()??;47				match call {48					UniqueNFTCall::ERC721UniqueExtensions(49						ERC721UniqueExtensionsCall::Transfer { token_id, .. },50					) => {51						let token_id: TokenId = token_id.try_into().ok()?;52						withdraw_transfer::<T>(&collection, &who, &token_id).map(|()| sponsor)53					}54					UniqueNFTCall::ERC721(ERC721Call::TransferFrom { token_id, from, .. }) => {55						let token_id: TokenId = token_id.try_into().ok()?;56						let from = T::CrossAccountId::from_eth(from);57						withdraw_transfer::<T>(&collection, &from, &token_id).map(|()| sponsor)58					}59					UniqueNFTCall::ERC721(ERC721Call::Approve { token_id, .. }) => {60						let token_id: TokenId = token_id.try_into().ok()?;61						withdraw_approve::<T>(&collection, who.as_sub(), &token_id)62							.map(|()| sponsor)63					}64					_ => None,65				}66			}67			crate::CollectionMode::Fungible(_) => {68				let call = <UniqueFungibleCall<T>>::parse(method_id, &mut reader).ok()??;69				#[allow(clippy::single_match)]70				match call {71					UniqueFungibleCall::ERC20(ERC20Call::Transfer { .. }) => {72						withdraw_transfer::<T>(&collection, &who, &TokenId::default())73							.map(|()| sponsor)74					}75					UniqueFungibleCall::ERC20(ERC20Call::TransferFrom { from, .. }) => {76						let from = T::CrossAccountId::from_eth(from);77						withdraw_transfer::<T>(&collection, &from, &TokenId::default())78							.map(|()| sponsor)79					}80					UniqueFungibleCall::ERC20(ERC20Call::Approve { .. }) => {81						withdraw_approve::<T>(&collection, who.as_sub(), &TokenId::default())82							.map(|()| sponsor)83					}84					_ => None,85				}86			}87			_ => None,88		}89	}90}