difftreelog
chore fix comments
in: master
3 files changed
pallets/common/src/eth.rsdiffbeforeafterboth--- a/pallets/common/src/eth.rs
+++ b/pallets/common/src/eth.rs
@@ -125,9 +125,9 @@
/// Ethereum representation of Optional value with CrossAddress.
#[derive(Debug, Default, AbiCoder)]
pub struct OptionCrossAddress {
- /// TODO: field description
+ /// Is address set
pub status: bool,
- /// TODO: field description
+ /// Address value
pub value: CrossAddress,
}
pallets/refungible/src/erc_token.rsdiffbeforeafterboth--- a/pallets/refungible/src/erc_token.rs
+++ b/pallets/refungible/src/erc_token.rs
@@ -43,6 +43,9 @@
TotalSupply, weights::WeightInfo,
};
+/// Refungible token handle contains information about token's collection and id
+///
+/// RefungibleTokenHandle doesn't check token's existance upon creation
pub struct RefungibleTokenHandle<T: Config>(pub RefungibleHandle<T>, pub TokenId);
#[solidity_interface(name = ERC1633)]
runtime/common/ethereum/sponsoring/refungible.rsdiffbeforeafterboth1// 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 core::convert::TryInto;20use pallet_common::CollectionHandle;21use pallet_evm::account::CrossAccountId;22use pallet_fungible::Config as FungibleConfig;23use pallet_refungible::Config as RefungibleConfig;24use pallet_nonfungible::Config as NonfungibleConfig;25use pallet_unique::Config as UniqueConfig;26use up_data_structs::{CreateItemData, CreateNftData, TokenId};2728use super::common;29use crate::runtime_common::sponsoring::*;3031use pallet_refungible::{32 erc::{33 ERC721BurnableCall, ERC721Call, ERC721EnumerableCall, ERC721MetadataCall,34 ERC721UniqueExtensionsCall, ERC721UniqueMintableCall, TokenPropertiesCall,35 UniqueRefungibleCall,36 },37 erc_token::{38 ERC1633Call, ERC20Call, ERC20UniqueExtensionsCall, RefungibleTokenHandle,39 UniqueRefungibleTokenCall,40 },41};4243pub fn call_sponsor<T>(44 call: UniqueRefungibleCall<T>,45 collection: CollectionHandle<T>,46 who: &T::CrossAccountId,47) -> Option<()>48where49 T: UniqueConfig + FungibleConfig + NonfungibleConfig + RefungibleConfig,50{51 use UniqueRefungibleCall::*;5253 match call {54 // Readonly55 ERC165Call(_, _) => None,5657 ERC721Enumerable(call) => erc721::enumerable_call_sponsor(call, collection, who),58 ERC721Burnable(call) => erc721::burnable_call_sponsor(call, collection, who),59 ERC721Metadata(call) => erc721::metadata_call_sponsor(call, collection, who),60 Collection(call) => common::collection_call_sponsor(call, collection, who),61 ERC721(call) => erc721::call_sponsor(call, collection, who),62 ERC721UniqueExtensions(call) => {63 erc721::unique_extensions_call_sponsor(call, collection, who)64 }65 ERC721UniqueMintable(call) => erc721::unique_mintable_call_sponsor(call, collection, who),66 TokenProperties(call) => token_properties_call_sponsor(call, collection, who),67 }68}6970pub fn token_properties_call_sponsor<T>(71 call: TokenPropertiesCall<T>,72 collection: CollectionHandle<T>,73 who: &T::CrossAccountId,74) -> Option<()>75where76 T: UniqueConfig + FungibleConfig + NonfungibleConfig + RefungibleConfig,77{78 use TokenPropertiesCall::*;7980 match call {81 // Readonly82 ERC165Call(_, _) | Property { .. } | TokenPropertyPermissions => None,8384 // Not sponsored85 SetTokenPropertyPermission { .. }86 | SetTokenPropertyPermissions { .. }87 | SetProperties { .. }88 | DeleteProperty { .. }89 | DeleteProperties { .. } => None,9091 SetProperty {92 token_id,93 key,94 value,95 ..96 } => {97 let token_id = TokenId::try_from(token_id).ok()?;98 withdraw_set_token_property::<T>(&collection, &who, &token_id, key.len() + value.len())99 }100 }101}102103pub fn token_call_sponsor<T>(104 call: UniqueRefungibleTokenCall<T>,105 token: RefungibleTokenHandle<T>,106 who: &T::CrossAccountId,107) -> Option<()>108where109 T: UniqueConfig + FungibleConfig + NonfungibleConfig + RefungibleConfig,110{111 use UniqueRefungibleTokenCall::*;112113 match call {114 // Readonly115 ERC165Call(_, _) => None,116117 ERC20(call) => erc20::call_sponsor(call, token, who),118 ERC20UniqueExtensions(call) => erc20::unique_extensions_call_sponsor(call, token, who),119 ERC1633(call) => erc1633::call_sponsor(call, token, who),120 }121}122123mod erc721 {124 use super::*;125126 pub fn call_sponsor<T>(127 call: ERC721Call<T>,128 collection: CollectionHandle<T>,129 _who: &T::CrossAccountId,130 ) -> Option<()>131 where132 T: UniqueConfig + FungibleConfig + NonfungibleConfig + RefungibleConfig,133 {134 use ERC721Call::*;135136 match call {137 // Readonly138 ERC165Call(_, _)139 | BalanceOf { .. }140 | OwnerOf { .. }141 | GetApproved { .. }142 | IsApprovedForAll { .. }143 | CollectionHelperAddress => None,144145 // Not sponsored146 SafeTransferFromWithData { .. }147 | SafeTransferFrom { .. }148 | SetApprovalForAll { .. } => None,149150 TransferFrom { token_id, from, .. } => {151 let token_id = TokenId::try_from(token_id).ok()?;152 let from = T::CrossAccountId::from_eth(from);153 withdraw_transfer::<T>(&collection, &from, &token_id)154 }155156 // Not supported157 Approve { .. } => None,158 }159 }160161 pub fn enumerable_call_sponsor<T>(162 call: ERC721EnumerableCall<T>,163 _collection: CollectionHandle<T>,164 _who: &T::CrossAccountId,165 ) -> Option<()>166 where167 T: UniqueConfig + FungibleConfig + NonfungibleConfig + RefungibleConfig,168 {169 use ERC721EnumerableCall::*;170171 match call {172 // Readonly173 ERC165Call(_, _) | TokenByIndex { .. } | TokenOfOwnerByIndex { .. } | TotalSupply => {174 None175 }176 }177 }178179 pub fn burnable_call_sponsor<T>(180 call: ERC721BurnableCall<T>,181 _collection: CollectionHandle<T>,182 _who: &T::CrossAccountId,183 ) -> Option<()>184 where185 T: UniqueConfig + FungibleConfig + NonfungibleConfig + RefungibleConfig,186 {187 use ERC721BurnableCall::*;188189 match call {190 // Readonly191 ERC165Call(_, _) => None,192193 // Not sponsored194 Burn { .. } => None,195 }196 }197198 pub fn metadata_call_sponsor<T>(199 call: ERC721MetadataCall<T>,200 _collection: CollectionHandle<T>,201 _who: &T::CrossAccountId,202 ) -> Option<()>203 where204 T: UniqueConfig + FungibleConfig + NonfungibleConfig + RefungibleConfig,205 {206 use ERC721MetadataCall::*;207208 match call {209 // Readonly210 ERC165Call(_, _) | NameProxy | SymbolProxy | TokenUri { .. } => None,211 }212 }213214 pub fn unique_extensions_call_sponsor<T>(215 call: ERC721UniqueExtensionsCall<T>,216 collection: CollectionHandle<T>,217 who: &T::CrossAccountId,218 ) -> Option<()>219 where220 T: UniqueConfig + FungibleConfig + NonfungibleConfig + RefungibleConfig,221 {222 use ERC721UniqueExtensionsCall::*;223224 match call {225 // Readonly226 ERC165Call(_, _)227 | Name228 | Symbol229 | Description230 | CrossOwnerOf { .. }231 | Properties { .. }232 | NextTokenId233 | TokenContractAddress { .. } => None,234235 // Not sponsored236 BurnFrom { .. }237 | BurnFromCross { .. }238 | MintBulk { .. }239 | MintBulkWithTokenUri { .. } => None,240241 MintCross { .. } => withdraw_create_item::<T>(242 &collection,243 &who,244 &CreateItemData::NFT(CreateNftData::default()),245 ),246247 TransferCross { token_id, .. }248 | TransferFromCross { token_id, .. }249 | Transfer { token_id, .. } => {250 let token_id = TokenId::try_from(token_id).ok()?;251 withdraw_transfer::<T>(&collection, &who, &token_id)252 }253 }254 }255256 pub fn unique_mintable_call_sponsor<T>(257 call: ERC721UniqueMintableCall<T>,258 collection: CollectionHandle<T>,259 who: &T::CrossAccountId,260 ) -> Option<()>261 where262 T: UniqueConfig + FungibleConfig + NonfungibleConfig + RefungibleConfig,263 {264 use ERC721UniqueMintableCall::*;265266 match call {267 // Readonly268 ERC165Call(_, _) | MintingFinished => None,269270 // Not sponsored271 FinishMinting => None,272273 Mint { .. }274 | MintCheckId { .. }275 | MintWithTokenUri { .. }276 | MintWithTokenUriCheckId { .. } => withdraw_create_item::<T>(277 &collection,278 &who,279 &CreateItemData::NFT(CreateNftData::default()),280 ),281 }282 }283}284285mod erc20 {286 use super::*;287288 pub fn call_sponsor<T>(289 call: ERC20Call<T>,290 token: RefungibleTokenHandle<T>,291 who: &T::CrossAccountId,292 ) -> Option<()>293 where294 T: UniqueConfig + FungibleConfig + NonfungibleConfig + RefungibleConfig,295 {296 use ERC20Call::*;297298 match call {299 // Readonly300 ERC165Call(_, _)301 | Name302 | Symbol303 | TotalSupply304 | Decimals305 | BalanceOf { .. }306 | Allowance { .. } => None,307308 Transfer { .. } => {309 let RefungibleTokenHandle(handle, token_id) = token;310 let token_id = token_id.try_into().ok()?;311 withdraw_transfer::<T>(&handle, &who, &token_id)312 }313 TransferFrom { from, .. } => {314 let RefungibleTokenHandle(handle, token_id) = token;315 let token_id = token_id.try_into().ok()?;316 let from = T::CrossAccountId::from_eth(from);317 withdraw_transfer::<T>(&handle, &from, &token_id)318 }319 Approve { .. } => {320 let RefungibleTokenHandle(handle, token_id) = token;321 let token_id = token_id.try_into().ok()?;322 withdraw_approve::<T>(&handle, who.as_sub(), &token_id)323 }324 }325 }326327 pub fn unique_extensions_call_sponsor<T>(328 call: ERC20UniqueExtensionsCall<T>,329 token: RefungibleTokenHandle<T>,330 who: &T::CrossAccountId,331 ) -> Option<()>332 where333 T: UniqueConfig + FungibleConfig + NonfungibleConfig + RefungibleConfig,334 {335 use ERC20UniqueExtensionsCall::*;336337 match call {338 // Readonly339 ERC165Call(_, _) => None,340341 // Not sponsored342 BurnFrom { .. } | BurnFromCross { .. } | Repartition { .. } => None,343344 TransferCross { .. } | TransferFromCross { .. } => {345 let RefungibleTokenHandle(handle, token_id) = token;346 let token_id = token_id.try_into().ok()?;347 withdraw_transfer::<T>(&handle, &who, &token_id)348 }349350 ApproveCross { .. } => {351 let RefungibleTokenHandle(handle, token_id) = token;352 let token_id = token_id.try_into().ok()?;353 withdraw_approve::<T>(&handle, who.as_sub(), &token_id)354 }355 }356 }357}358359mod erc1633 {360 use super::*;361362 pub fn call_sponsor<T>(363 call: ERC1633Call<T>,364 _token: RefungibleTokenHandle<T>,365 _who: &T::CrossAccountId,366 ) -> Option<()>367 where368 T: UniqueConfig + FungibleConfig + NonfungibleConfig + RefungibleConfig,369 {370 use ERC1633Call::*;371372 match call {373 // Readonly374 ERC165Call(_, _) | ParentToken | ParentTokenId => None,375 }376 }377}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 core::convert::TryInto;20use pallet_common::CollectionHandle;21use pallet_evm::account::CrossAccountId;22use pallet_fungible::Config as FungibleConfig;23use pallet_refungible::Config as RefungibleConfig;24use pallet_nonfungible::Config as NonfungibleConfig;25use pallet_unique::Config as UniqueConfig;26use up_data_structs::{CreateItemData, CreateNftData, TokenId};2728use super::common;29use crate::runtime_common::sponsoring::*;3031use pallet_refungible::{32 erc::{33 ERC721BurnableCall, ERC721Call, ERC721EnumerableCall, ERC721MetadataCall,34 ERC721UniqueExtensionsCall, ERC721UniqueMintableCall, TokenPropertiesCall,35 UniqueRefungibleCall,36 },37 erc_token::{38 ERC1633Call, ERC20Call, ERC20UniqueExtensionsCall, RefungibleTokenHandle,39 UniqueRefungibleTokenCall,40 },41};4243pub fn call_sponsor<T>(44 call: UniqueRefungibleCall<T>,45 collection: CollectionHandle<T>,46 who: &T::CrossAccountId,47) -> Option<()>48where49 T: UniqueConfig + FungibleConfig + NonfungibleConfig + RefungibleConfig,50{51 use UniqueRefungibleCall::*;5253 match call {54 // Readonly55 ERC165Call(_, _) => None,5657 ERC721Enumerable(call) => erc721::enumerable_call_sponsor(call, collection, who),58 ERC721Burnable(call) => erc721::burnable_call_sponsor(call, collection, who),59 ERC721Metadata(call) => erc721::metadata_call_sponsor(call, collection, who),60 Collection(call) => common::collection_call_sponsor(call, collection, who),61 ERC721(call) => erc721::call_sponsor(call, collection, who),62 ERC721UniqueExtensions(call) => {63 erc721::unique_extensions_call_sponsor(call, collection, who)64 }65 ERC721UniqueMintable(call) => erc721::unique_mintable_call_sponsor(call, collection, who),66 TokenProperties(call) => token_properties_call_sponsor(call, collection, who),67 }68}6970pub fn token_properties_call_sponsor<T>(71 call: TokenPropertiesCall<T>,72 collection: CollectionHandle<T>,73 who: &T::CrossAccountId,74) -> Option<()>75where76 T: UniqueConfig + FungibleConfig + NonfungibleConfig + RefungibleConfig,77{78 use TokenPropertiesCall::*;7980 match call {81 // Readonly82 ERC165Call(_, _) | Property { .. } | TokenPropertyPermissions => None,8384 // Not sponsored85 SetTokenPropertyPermission { .. }86 | SetTokenPropertyPermissions { .. }87 | SetProperties { .. }88 | DeleteProperty { .. }89 | DeleteProperties { .. } => None,9091 SetProperty {92 token_id,93 key,94 value,95 ..96 } => {97 let token_id = TokenId::try_from(token_id).ok()?;98 withdraw_set_token_property::<T>(&collection, &who, &token_id, key.len() + value.len())99 }100 }101}102103pub fn token_call_sponsor<T>(104 call: UniqueRefungibleTokenCall<T>,105 token: RefungibleTokenHandle<T>,106 who: &T::CrossAccountId,107) -> Option<()>108where109 T: UniqueConfig + FungibleConfig + NonfungibleConfig + RefungibleConfig,110{111 use UniqueRefungibleTokenCall::*;112113 match call {114 // Readonly115 ERC165Call(_, _) => None,116117 ERC20(call) => erc20::call_sponsor(call, token, who),118 ERC20UniqueExtensions(call) => erc20::unique_extensions_call_sponsor(call, token, who),119 ERC1633(call) => erc1633::call_sponsor(call, token, who),120 }121}122123mod erc721 {124 use super::*;125126 pub fn call_sponsor<T>(127 call: ERC721Call<T>,128 collection: CollectionHandle<T>,129 _who: &T::CrossAccountId,130 ) -> Option<()>131 where132 T: UniqueConfig + FungibleConfig + NonfungibleConfig + RefungibleConfig,133 {134 use ERC721Call::*;135136 match call {137 // Readonly138 ERC165Call(_, _)139 | BalanceOf { .. }140 | OwnerOf { .. }141 | GetApproved { .. }142 | IsApprovedForAll { .. }143 | CollectionHelperAddress => None,144145 // Not sponsored146 SafeTransferFromWithData { .. }147 | SafeTransferFrom { .. }148 | SetApprovalForAll { .. } => None,149150 TransferFrom { token_id, from, .. } => {151 let token_id = TokenId::try_from(token_id).ok()?;152 let from = T::CrossAccountId::from_eth(from);153 withdraw_transfer::<T>(&collection, &from, &token_id)154 }155156 // Not supported157 Approve { .. } => None,158 }159 }160161 pub fn enumerable_call_sponsor<T>(162 call: ERC721EnumerableCall<T>,163 _collection: CollectionHandle<T>,164 _who: &T::CrossAccountId,165 ) -> Option<()>166 where167 T: UniqueConfig + FungibleConfig + NonfungibleConfig + RefungibleConfig,168 {169 use ERC721EnumerableCall::*;170171 match call {172 // Readonly173 ERC165Call(_, _) | TokenByIndex { .. } | TokenOfOwnerByIndex { .. } | TotalSupply => {174 None175 }176 }177 }178179 pub fn burnable_call_sponsor<T>(180 call: ERC721BurnableCall<T>,181 _collection: CollectionHandle<T>,182 _who: &T::CrossAccountId,183 ) -> Option<()>184 where185 T: UniqueConfig + FungibleConfig + NonfungibleConfig + RefungibleConfig,186 {187 use ERC721BurnableCall::*;188189 match call {190 // Readonly191 ERC165Call(_, _) => None,192193 // Not sponsored194 Burn { .. } => None,195 }196 }197198 pub fn metadata_call_sponsor<T>(199 call: ERC721MetadataCall<T>,200 _collection: CollectionHandle<T>,201 _who: &T::CrossAccountId,202 ) -> Option<()>203 where204 T: UniqueConfig + FungibleConfig + NonfungibleConfig + RefungibleConfig,205 {206 use ERC721MetadataCall::*;207208 match call {209 // Readonly210 ERC165Call(_, _) | NameProxy | SymbolProxy | TokenUri { .. } => None,211 }212 }213214 pub fn unique_extensions_call_sponsor<T>(215 call: ERC721UniqueExtensionsCall<T>,216 collection: CollectionHandle<T>,217 who: &T::CrossAccountId,218 ) -> Option<()>219 where220 T: UniqueConfig + FungibleConfig + NonfungibleConfig + RefungibleConfig,221 {222 use ERC721UniqueExtensionsCall::*;223224 match call {225 // Readonly226 ERC165Call(_, _)227 | Name228 | Symbol229 | Description230 | CrossOwnerOf { .. }231 | Properties { .. }232 | NextTokenId233 | TokenContractAddress { .. } => None,234235 // Not sponsored236 BurnFrom { .. }237 | BurnFromCross { .. }238 | MintBulk { .. }239 | MintBulkWithTokenUri { .. } => None,240241 MintCross { .. } => withdraw_create_item::<T>(242 &collection,243 &who,244 &CreateItemData::NFT(CreateNftData::default()),245 ),246247 TransferCross { token_id, .. }248 | TransferFromCross { token_id, .. }249 | Transfer { token_id, .. } => {250 let token_id = TokenId::try_from(token_id).ok()?;251 withdraw_transfer::<T>(&collection, &who, &token_id)252 }253 }254 }255256 pub fn unique_mintable_call_sponsor<T>(257 call: ERC721UniqueMintableCall<T>,258 collection: CollectionHandle<T>,259 who: &T::CrossAccountId,260 ) -> Option<()>261 where262 T: UniqueConfig + FungibleConfig + NonfungibleConfig + RefungibleConfig,263 {264 use ERC721UniqueMintableCall::*;265266 match call {267 // Readonly268 ERC165Call(_, _) | MintingFinished => None,269270 // Not sponsored271 FinishMinting => None,272273 Mint { .. }274 | MintCheckId { .. }275 | MintWithTokenUri { .. }276 | MintWithTokenUriCheckId { .. } => withdraw_create_item::<T>(277 &collection,278 &who,279 &CreateItemData::NFT(CreateNftData::default()),280 ),281 }282 }283}284285/// Module for methods of refungible token286///287/// Existance of token should be checked before searching for sponsor288/// because RefungibleTokenHandle doesn't check token's existence upon creation289mod erc20 {290 use super::*;291292 pub fn call_sponsor<T>(293 call: ERC20Call<T>,294 token: RefungibleTokenHandle<T>,295 who: &T::CrossAccountId,296 ) -> Option<()>297 where298 T: UniqueConfig + FungibleConfig + NonfungibleConfig + RefungibleConfig,299 {300 use ERC20Call::*;301302 match call {303 // Readonly304 ERC165Call(_, _)305 | Name306 | Symbol307 | TotalSupply308 | Decimals309 | BalanceOf { .. }310 | Allowance { .. } => None,311312 Transfer { .. } => {313 let RefungibleTokenHandle(handle, token_id) = token;314 let token_id = token_id.try_into().ok()?;315 withdraw_transfer::<T>(&handle, &who, &token_id)316 }317 TransferFrom { from, .. } => {318 let RefungibleTokenHandle(handle, token_id) = token;319 let token_id = token_id.try_into().ok()?;320 let from = T::CrossAccountId::from_eth(from);321 withdraw_transfer::<T>(&handle, &from, &token_id)322 }323 Approve { .. } => {324 let RefungibleTokenHandle(handle, token_id) = token;325 let token_id = token_id.try_into().ok()?;326 withdraw_approve::<T>(&handle, who.as_sub(), &token_id)327 }328 }329 }330331 pub fn unique_extensions_call_sponsor<T>(332 call: ERC20UniqueExtensionsCall<T>,333 token: RefungibleTokenHandle<T>,334 who: &T::CrossAccountId,335 ) -> Option<()>336 where337 T: UniqueConfig + FungibleConfig + NonfungibleConfig + RefungibleConfig,338 {339 use ERC20UniqueExtensionsCall::*;340341 match call {342 // Readonly343 ERC165Call(_, _) => None,344345 // Not sponsored346 BurnFrom { .. } | BurnFromCross { .. } | Repartition { .. } => None,347348 TransferCross { .. } | TransferFromCross { .. } => {349 let RefungibleTokenHandle(handle, token_id) = token;350 let token_id = token_id.try_into().ok()?;351 withdraw_transfer::<T>(&handle, &who, &token_id)352 }353354 ApproveCross { .. } => {355 let RefungibleTokenHandle(handle, token_id) = token;356 let token_id = token_id.try_into().ok()?;357 withdraw_approve::<T>(&handle, who.as_sub(), &token_id)358 }359 }360 }361}362363mod erc1633 {364 use super::*;365366 pub fn call_sponsor<T>(367 call: ERC1633Call<T>,368 _token: RefungibleTokenHandle<T>,369 _who: &T::CrossAccountId,370 ) -> Option<()>371 where372 T: UniqueConfig + FungibleConfig + NonfungibleConfig + RefungibleConfig,373 {374 use ERC1633Call::*;375376 match call {377 // Readonly378 ERC165Call(_, _) | ParentToken | ParentTokenId => None,379 }380 }381}