git.delta.rocks / unique-network / refs/commits / cbc2c66db866

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 TransactionValidityHack1819use 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 pallet_evm::account::CrossAccountId;28use up_data_structs::{TokenId, CreateItemData, CreateNftData};2930use pallet_nonfungible::erc::{31	UniqueNFTCall, ERC721UniqueExtensionsCall, ERC721MintableCall, ERC721Call,32};33use pallet_fungible::erc::{UniqueFungibleCall, ERC20Call};34use up_data_structs::{TokenId, CreateItemData, CreateNftData};3536pub struct UniqueEthSponsorshipHandler<T: Config>(PhantomData<*const T>);37impl<T: Config> SponsorshipHandler<T::CrossAccountId, (H160, Vec<u8>)>38	for UniqueEthSponsorshipHandler<T>39{40	fn get_sponsor(who: &T::CrossAccountId, call: &(H160, Vec<u8>)) -> Option<T::CrossAccountId> {41		let collection_id = map_eth_to_id(&call.0)?;42		let collection = <CollectionHandle<T>>::new(collection_id)?;43		let sponsor = collection.sponsorship.sponsor()?.clone();44		let (method_id, mut reader) = AbiReader::new_call(&call.1).ok()?;45		Some(T::CrossAccountId::from_sub(match &collection.mode {46			crate::CollectionMode::NFT => {47				let call = <UniqueNFTCall<T>>::parse(method_id, &mut reader).ok()??;48				match call {49					UniqueNFTCall::ERC721UniqueExtensions(50						ERC721UniqueExtensionsCall::Transfer { token_id, .. },51					) => {52						let token_id: TokenId = token_id.try_into().ok()?;53						withdraw_transfer::<T>(&collection, &who, &token_id).map(|()| sponsor)54					}55					UniqueNFTCall::ERC721Mintable(56						ERC721MintableCall::Mint { token_id, .. }57						| ERC721MintableCall::MintWithTokenUri { token_id, .. },58					) => {59						let _token_id: TokenId = token_id.try_into().ok()?;60						withdraw_create_item::<T>(61							&collection,62							&who,63							&CreateItemData::NFT(CreateNftData::default()),64						)65						.map(|()| sponsor)66					}67					UniqueNFTCall::ERC721(ERC721Call::TransferFrom { token_id, from, .. }) => {68						let token_id: TokenId = token_id.try_into().ok()?;69						let from = T::CrossAccountId::from_eth(from);70						withdraw_transfer::<T>(&collection, &from, &token_id).map(|()| sponsor)71					}72					UniqueNFTCall::ERC721(ERC721Call::Approve { token_id, .. }) => {73						let token_id: TokenId = token_id.try_into().ok()?;74						withdraw_approve::<T>(&collection, who.as_sub(), &token_id)75							.map(|()| sponsor)76					}77					_ => None,78				}79			}80			crate::CollectionMode::Fungible(_) => {81				let call = <UniqueFungibleCall<T>>::parse(method_id, &mut reader).ok()??;82				#[allow(clippy::single_match)]83				match call {84					UniqueFungibleCall::ERC20(ERC20Call::Transfer { .. }) => {85						withdraw_transfer::<T>(&collection, who, &TokenId::default())86							.map(|()| sponsor)87					}88					UniqueFungibleCall::ERC20(ERC20Call::TransferFrom { from, .. }) => {89						let from = T::CrossAccountId::from_eth(from);90						withdraw_transfer::<T>(&collection, &from, &TokenId::default())91							.map(|()| sponsor)92					}93					UniqueFungibleCall::ERC20(ERC20Call::Approve { .. }) => {94						withdraw_approve::<T>(&collection, who.as_sub(), &TokenId::default())95							.map(|()| sponsor)96					}97					_ => None,98				}99			}100			_ => None,101		}?))102	}103}