git.delta.rocks / unique-network / refs/commits / ea39b21f5df7

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::CrossAccountId, (H160, Vec<u8>)> for UniqueEthSponsorshipHandler<T> {35	fn get_sponsor(who: &T::CrossAccountId, call: &(H160, Vec<u8>)) -> Option<T::CrossAccountId> {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 (method_id, mut reader) = AbiReader::new_call(&call.1).ok()?;40		Some(T::CrossAccountId::from_sub(match &collection.mode {41			crate::CollectionMode::NFT => {42				let call = <UniqueNFTCall<T>>::parse(method_id, &mut reader).ok()??;43				match call {44					UniqueNFTCall::ERC721UniqueExtensions(45						ERC721UniqueExtensionsCall::Transfer { token_id, .. },46					) => {47						let token_id: TokenId = token_id.try_into().ok()?;48						withdraw_transfer::<T>(&collection, &who, &token_id).map(|()| sponsor)49					}50					UniqueNFTCall::ERC721(ERC721Call::TransferFrom { token_id, from, .. }) => {51						let token_id: TokenId = token_id.try_into().ok()?;52						let from = T::CrossAccountId::from_eth(from);53						withdraw_transfer::<T>(&collection, &from, &token_id).map(|()| sponsor)54					}55					UniqueNFTCall::ERC721(ERC721Call::Approve { token_id, .. }) => {56						let token_id: TokenId = token_id.try_into().ok()?;57						withdraw_approve::<T>(&collection, who.as_sub(), &token_id)58							.map(|()| sponsor)59					}60					_ => None,61				}62			}63			crate::CollectionMode::Fungible(_) => {64				let call = <UniqueFungibleCall<T>>::parse(method_id, &mut reader).ok()??;65				#[allow(clippy::single_match)]66				match call {67					UniqueFungibleCall::ERC20(ERC20Call::Transfer { .. }) => {68						withdraw_transfer::<T>(&collection, who, &TokenId::default())69							.map(|()| sponsor)70					}71					UniqueFungibleCall::ERC20(ERC20Call::TransferFrom { from, .. }) => {72						let from = T::CrossAccountId::from_eth(from);73						withdraw_transfer::<T>(&collection, &from, &TokenId::default())74							.map(|()| sponsor)75					}76					UniqueFungibleCall::ERC20(ERC20Call::Approve { .. }) => {77						withdraw_approve::<T>(&collection, who.as_sub(), &TokenId::default())78							.map(|()| sponsor)79					}80					_ => None,81				}82			}83			_ => None,84		}?))85	}86}