git.delta.rocks / unique-network / refs/commits / d030d8a70b74

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 pallet_evm::account::CrossAccountId;2930use pallet_nonfungible::erc::{UniqueNFTCall, ERC721UniqueExtensionsCall, ERC721Call};31use pallet_fungible::erc::{UniqueFungibleCall, ERC20Call};3233pub struct UniqueEthSponsorshipHandler<T: Config>(PhantomData<*const T>);34impl<T: Config> SponsorshipHandler<T::AccountId, (H160, Vec<u8>)> for UniqueEthSponsorshipHandler<T> {35	fn get_sponsor(who: &T::AccountId, call: &(H160, Vec<u8>)) -> Option<T::AccountId> {36		let collection_id = map_eth_to_id(&call.0)?;37		let collection = <CollectionHandle<T>>::new(collection_id)?;38		let sponsor = collection.sponsorship.sponsor()?.clone();39		let who = T::CrossAccountId::from_sub(who.clone());40		let (method_id, mut reader) = AbiReader::new_call(&call.1).ok()?;41		match &collection.mode {42			crate::CollectionMode::NFT => {43				let call = <UniqueNFTCall<T>>::parse(method_id, &mut reader).ok()??;44				match call {45					UniqueNFTCall::ERC721UniqueExtensions(46						ERC721UniqueExtensionsCall::Transfer { token_id, .. },47					) => {48						let token_id: TokenId = token_id.try_into().ok()?;49						withdraw_transfer::<T>(&collection, &who, &token_id).map(|()| sponsor)50					}51					UniqueNFTCall::ERC721(ERC721Call::TransferFrom { token_id, from, .. }) => {52						let token_id: TokenId = token_id.try_into().ok()?;53						let from = T::CrossAccountId::from_eth(from);54						withdraw_transfer::<T>(&collection, &from, &token_id).map(|()| sponsor)55					}56					UniqueNFTCall::ERC721(ERC721Call::Approve { token_id, .. }) => {57						let token_id: TokenId = token_id.try_into().ok()?;58						withdraw_approve::<T>(&collection, who.as_sub(), &token_id)59							.map(|()| sponsor)60					}61					_ => None,62				}63			}64			crate::CollectionMode::Fungible(_) => {65				let call = <UniqueFungibleCall<T>>::parse(method_id, &mut reader).ok()??;66				#[allow(clippy::single_match)]67				match call {68					UniqueFungibleCall::ERC20(ERC20Call::Transfer { .. }) => {69						withdraw_transfer::<T>(&collection, &who, &TokenId::default())70							.map(|()| sponsor)71					}72					UniqueFungibleCall::ERC20(ERC20Call::TransferFrom { from, .. }) => {73						let from = T::CrossAccountId::from_eth(from);74						withdraw_transfer::<T>(&collection, &from, &TokenId::default())75							.map(|()| sponsor)76					}77					UniqueFungibleCall::ERC20(ERC20Call::Approve { .. }) => {78						withdraw_approve::<T>(&collection, who.as_sub(), &TokenId::default())79							.map(|()| sponsor)80					}81					_ => None,82				}83			}84			_ => None,85		}86	}87}