git.delta.rocks / unique-network / refs/commits / 24d3f67bfdff

difftreelog

Merge pull request #848 from UniqueNetwork/fix/find-parent

Yaroslav Bolyukin2023-01-19parents: #030bc0d #05c459d.patch.diff
in: master

15 files changed

modifiedpallets/common/src/erc.rsdiffbeforeafterboth
--- a/pallets/common/src/erc.rs
+++ b/pallets/common/src/erc.rs
@@ -28,8 +28,8 @@
 use sp_std::{vec, vec::Vec};
 use sp_core::U256;
 use up_data_structs::{
-	AccessMode, CollectionMode, CollectionPermissions, OwnerRestrictedSet, Property,
-	SponsoringRateLimit, SponsorshipState,
+	CollectionMode, CollectionPermissions, OwnerRestrictedSet, Property, SponsoringRateLimit,
+	SponsorshipState,
 };
 
 use crate::{
modifiedpallets/common/src/eth.rsdiffbeforeafterboth
--- a/pallets/common/src/eth.rs
+++ b/pallets/common/src/eth.rs
@@ -80,10 +80,7 @@
 		if cross_account_id.is_canonical_substrate() {
 			Self::from_sub::<T>(cross_account_id.as_sub())
 		} else {
-			Self {
-				eth: *cross_account_id.as_eth(),
-				sub: Default::default(),
-			}
+			Self::from_eth(*cross_account_id.as_eth())
 		}
 	}
 	/// Creates [`CrossAddress`] from Substrate account.
@@ -97,6 +94,13 @@
 			sub: U256::from_big_endian(account_id.as_ref()),
 		}
 	}
+	/// Creates [`CrossAddress`] from Ethereum account.
+	pub fn from_eth(address: Address) -> Self {
+		Self {
+			eth: address,
+			sub: Default::default(),
+		}
+	}
 	/// Converts [`CrossAddress`] to `CrossAccountId`.
 	pub fn into_sub_cross_account<T>(&self) -> evm_coder::execution::Result<T::CrossAccountId>
 	where
modifiedpallets/common/src/lib.rsdiffbeforeafterboth
--- a/pallets/common/src/lib.rs
+++ b/pallets/common/src/lib.rs
@@ -100,6 +100,7 @@
 	PropertyValue,
 	PropertyPermission,
 	PropertiesError,
+	TokenOwnerError,
 	PropertyKeyPermission,
 	TokenData,
 	TrySetProperty,
@@ -2134,7 +2135,7 @@
 	/// Get the owner of the token.
 	///
 	/// * `token` - The token for which you need to find out the owner.
-	fn token_owner(&self, token: TokenId) -> Option<T::CrossAccountId>;
+	fn token_owner(&self, token: TokenId) -> Result<T::CrossAccountId, TokenOwnerError>;
 
 	/// Returns 10 tokens owners in no particular order.
 	///
modifiedpallets/fungible/src/common.rsdiffbeforeafterboth
--- a/pallets/fungible/src/common.rs
+++ b/pallets/fungible/src/common.rs
@@ -17,7 +17,9 @@
 use core::marker::PhantomData;
 
 use frame_support::{dispatch::DispatchResultWithPostInfo, ensure, fail, weights::Weight, traits::Get};
-use up_data_structs::{TokenId, CollectionId, CreateItemExData, budget::Budget, CreateItemData};
+use up_data_structs::{
+	TokenId, CollectionId, CreateItemExData, budget::Budget, CreateItemData, TokenOwnerError,
+};
 use pallet_common::{
 	CommonCollectionOperations, CommonWeightInfo, RefungibleExtensions, with_weight,
 	weights::WeightInfo as _,
@@ -404,8 +406,8 @@
 		TokenId::default()
 	}
 
-	fn token_owner(&self, _token: TokenId) -> Option<T::CrossAccountId> {
-		None
+	fn token_owner(&self, _token: TokenId) -> Result<T::CrossAccountId, TokenOwnerError> {
+		Err(TokenOwnerError::MultipleOwners)
 	}
 
 	/// Returns 10 tokens owners in no particular order.
modifiedpallets/nonfungible/src/common.rsdiffbeforeafterboth
--- a/pallets/nonfungible/src/common.rs
+++ b/pallets/nonfungible/src/common.rs
@@ -19,7 +19,7 @@
 use frame_support::{dispatch::DispatchResultWithPostInfo, ensure, fail, weights::Weight};
 use up_data_structs::{
 	TokenId, CreateItemExData, CollectionId, budget::Budget, Property, PropertyKey,
-	PropertyKeyPermission, PropertyValue,
+	PropertyKeyPermission, PropertyValue, TokenOwnerError,
 };
 use pallet_common::{
 	CommonCollectionOperations, CommonWeightInfo, RefungibleExtensions, with_weight,
@@ -460,13 +460,15 @@
 		TokenId(<TokensMinted<T>>::get(self.id))
 	}
 
-	fn token_owner(&self, token: TokenId) -> Option<T::CrossAccountId> {
-		<TokenData<T>>::get((self.id, token)).map(|t| t.owner)
+	fn token_owner(&self, token: TokenId) -> Result<T::CrossAccountId, TokenOwnerError> {
+		<TokenData<T>>::get((self.id, token))
+			.map(|t| t.owner)
+			.ok_or(TokenOwnerError::NotFound)
 	}
 
 	/// Returns token owners.
 	fn token_owners(&self, token: TokenId) -> Vec<T::CrossAccountId> {
-		self.token_owner(token).map_or_else(|| vec![], |t| vec![t])
+		self.token_owner(token).map_or_else(|_| vec![], |t| vec![t])
 	}
 
 	fn token_property(&self, token_id: TokenId, key: &PropertyKey) -> Option<PropertyValue> {
modifiedpallets/nonfungible/src/erc.rsdiffbeforeafterboth
--- a/pallets/nonfungible/src/erc.rs
+++ b/pallets/nonfungible/src/erc.rs
@@ -728,7 +728,7 @@
 	fn cross_owner_of(&self, token_id: U256) -> Result<eth::CrossAddress> {
 		Self::token_owner(&self, token_id.try_into()?)
 			.map(|o| eth::CrossAddress::from_sub_cross_account::<T>(&o))
-			.ok_or(Error::Revert("key too large".into()))
+			.map_err(|_| Error::Revert("token not found".into()))
 	}
 
 	/// Returns the token properties.
modifiedpallets/proxy-rmrk-core/src/lib.rsdiffbeforeafterboth
--- a/pallets/proxy-rmrk-core/src/lib.rs
+++ b/pallets/proxy-rmrk-core/src/lib.rs
@@ -741,7 +741,8 @@
 						Some((collection_id, nft_id)),
 						&target_nft_budget,
 					)
-					.map_err(Self::map_unique_err_to_proxy)?;
+					.map_err(Self::map_unique_err_to_proxy)?
+					.ok_or::<DispatchError>(<Error<T>>::NoPermission.into())?;
 
 					approval_required = cross_sender != target_nft_owner;
 
@@ -989,7 +990,8 @@
 
 			let nft_owner =
 				<PalletStructure<T>>::find_topmost_owner(collection_id, nft_id, &budget)
-					.map_err(|_| <Error<T>>::ResourceDoesntExist)?;
+					.map_err(|_| <Error<T>>::ResourceDoesntExist)?
+					.ok_or::<DispatchError>(<Error<T>>::NoPermission.into())?;
 
 			Self::try_mutate_resource_info(collection_id, nft_id, resource_id, |res| {
 				ensure!(res.pending, <Error<T>>::ResourceNotPending);
@@ -1044,7 +1046,8 @@
 
 			let nft_owner =
 				<PalletStructure<T>>::find_topmost_owner(collection_id, nft_id, &budget)
-					.map_err(|_| <Error<T>>::ResourceDoesntExist)?;
+					.map_err(|_| <Error<T>>::ResourceDoesntExist)?
+					.ok_or::<DispatchError>(<Error<T>>::NoPermission.into())?;
 
 			ensure!(cross_sender == nft_owner, <Error<T>>::NoPermission);
 
@@ -1666,7 +1669,8 @@
 		let budget = budget::Value::new(NESTING_BUDGET);
 
 		let nft_owner = <PalletStructure<T>>::find_topmost_owner(collection_id, nft_id, &budget)
-			.map_err(Self::map_unique_err_to_proxy)?;
+			.map_err(Self::map_unique_err_to_proxy)?
+			.ok_or::<DispatchError>(<Error<T>>::NoPermission.into())?;
 
 		let pending = sender != nft_owner;
 
@@ -1720,7 +1724,8 @@
 
 		let budget = up_data_structs::budget::Value::new(NESTING_BUDGET);
 		let topmost_owner =
-			<PalletStructure<T>>::find_topmost_owner(collection_id, nft_id, &budget)?;
+			<PalletStructure<T>>::find_topmost_owner(collection_id, nft_id, &budget)?
+				.ok_or::<DispatchError>(<Error<T>>::NoPermission.into())?;
 
 		let sender = T::CrossAccountId::from_sub(sender);
 		if topmost_owner == sender {
modifiedpallets/proxy-rmrk-core/src/rpc.rsdiffbeforeafterboth
--- a/pallets/proxy-rmrk-core/src/rpc.rs
+++ b/pallets/proxy-rmrk-core/src/rpc.rs
@@ -68,7 +68,7 @@
 	}
 
 	let owner = match collection.token_owner(nft_id) {
-		Some(owner) => match T::CrossTokenAddressMapping::address_to_token(&owner) {
+		Ok(owner) => match T::CrossTokenAddressMapping::address_to_token(&owner) {
 			Some((col, tok)) => {
 				let rmrk_collection = <Pallet<T>>::rmrk_collection_id(col)?;
 
@@ -76,7 +76,7 @@
 			}
 			None => RmrkAccountIdOrCollectionNftTuple::AccountId(owner.as_sub().clone()),
 		},
-		None => return Ok(None),
+		_ => return Ok(None),
 	};
 
 	Ok(Some(RmrkInstanceInfo {
modifiedpallets/refungible/src/common.rsdiffbeforeafterboth
--- a/pallets/refungible/src/common.rs
+++ b/pallets/refungible/src/common.rs
@@ -21,7 +21,7 @@
 use up_data_structs::{
 	CollectionId, TokenId, CreateItemExData, budget::Budget, Property, PropertyKey, PropertyValue,
 	PropertyKeyPermission, CollectionPropertiesVec, CreateRefungibleExMultipleOwners,
-	CreateRefungibleExSingleOwner,
+	CreateRefungibleExSingleOwner, TokenOwnerError,
 };
 use pallet_common::{
 	CommonCollectionOperations, CommonWeightInfo, RefungibleExtensions, with_weight,
@@ -478,7 +478,7 @@
 		TokenId(<TokensMinted<T>>::get(self.id))
 	}
 
-	fn token_owner(&self, token: TokenId) -> Option<T::CrossAccountId> {
+	fn token_owner(&self, token: TokenId) -> Result<T::CrossAccountId, TokenOwnerError> {
 		<Pallet<T>>::token_owner(self.id, token)
 	}
 
modifiedpallets/refungible/src/erc.rsdiffbeforeafterboth
--- a/pallets/refungible/src/erc.rs
+++ b/pallets/refungible/src/erc.rs
@@ -43,7 +43,7 @@
 use sp_std::{collections::btree_map::BTreeMap, vec::Vec, vec};
 use up_data_structs::{
 	CollectionId, CollectionPropertiesVec, mapping::TokenAddressMapping, Property, PropertyKey,
-	PropertyKeyPermission, PropertyPermission, TokenId,
+	PropertyKeyPermission, PropertyPermission, TokenId, TokenOwnerError,
 };
 
 use crate::{
@@ -411,9 +411,12 @@
 		self.consume_store_reads(2)?;
 		let token = token_id.try_into()?;
 		let owner = <Pallet<T>>::token_owner(self.id, token);
-		Ok(owner
+		owner
 			.map(|address| *address.as_eth())
-			.unwrap_or_else(|| ADDRESS_FOR_PARTIALLY_OWNED_TOKENS))
+			.or_else(|err| match err {
+				TokenOwnerError::NotFound => Err(Error::Revert("token not found".into())),
+				TokenOwnerError::MultipleOwners => Ok(ADDRESS_FOR_PARTIALLY_OWNED_TOKENS),
+			})
 	}
 
 	/// @dev Not implemented
@@ -766,7 +769,12 @@
 	fn cross_owner_of(&self, token_id: U256) -> Result<eth::CrossAddress> {
 		Self::token_owner(&self, token_id.try_into()?)
 			.map(|o| eth::CrossAddress::from_sub_cross_account::<T>(&o))
-			.ok_or(Error::Revert("key too large".into()))
+			.or_else(|err| match err {
+				TokenOwnerError::NotFound => Err(Error::Revert("token not found".into())),
+				TokenOwnerError::MultipleOwners => Ok(eth::CrossAddress::from_eth(
+					ADDRESS_FOR_PARTIALLY_OWNED_TOKENS,
+				)),
+			})
 	}
 
 	/// Returns the token properties.
modifiedpallets/refungible/src/lib.rsdiffbeforeafterboth
--- a/pallets/refungible/src/lib.rs
+++ b/pallets/refungible/src/lib.rs
@@ -107,7 +107,7 @@
 	AccessMode, budget::Budget, CollectionId, CollectionFlags, CreateCollectionData,
 	mapping::TokenAddressMapping, MAX_REFUNGIBLE_PIECES, Property, PropertyKey,
 	PropertyKeyPermission, PropertyPermission, PropertyScope, PropertyValue, TokenId,
-	TrySetProperty, PropertiesPermissionMap, CreateRefungibleExMultipleOwners,
+	TrySetProperty, PropertiesPermissionMap, CreateRefungibleExMultipleOwners, TokenOwnerError,
 };
 
 pub use pallet::*;
@@ -480,7 +480,7 @@
 			<Balance<T>>::remove((collection.id, token, owner));
 			<AccountBalance<T>>::insert((collection.id, owner), account_balance);
 
-			if let Some(user) = Self::token_owner(collection.id, token) {
+			if let Ok(user) = Self::token_owner(collection.id, token) {
 				<PalletEvm<T>>::deposit_log(
 					ERC721Events::Transfer {
 						from: erc::ADDRESS_FOR_PARTIALLY_OWNED_TOKENS,
@@ -1365,17 +1365,20 @@
 		Ok(())
 	}
 
-	fn token_owner(collection_id: CollectionId, token_id: TokenId) -> Option<T::CrossAccountId> {
+	fn token_owner(
+		collection_id: CollectionId,
+		token_id: TokenId,
+	) -> Result<T::CrossAccountId, TokenOwnerError> {
 		let mut owner = None;
 		let mut count = 0;
 		for key in Balance::<T>::iter_key_prefix((collection_id, token_id)) {
 			count += 1;
 			if count > 1 {
-				return None;
+				return Err(TokenOwnerError::MultipleOwners);
 			}
 			owner = Some(key);
 		}
-		owner
+		owner.ok_or(TokenOwnerError::NotFound)
 	}
 
 	fn total_pieces(collection_id: CollectionId, token_id: TokenId) -> Option<u128> {
modifiedpallets/structure/src/lib.rsdiffbeforeafterboth
before · pallets/structure/src/lib.rs
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//! # Structure Pallet18//!19//! The Structure pallet provides functionality for handling tokens nesting an unnesting.20//!21//! - [`Config`]22//! - [`Pallet`]23//!24//! ## Overview25//!26//! The Structure pallet provides functions for:27//!28//! - Searching for token parents, children and owners. Actual implementation of searching for29//!   parent/child is done by pallets corresponding to token's collection type.30//! - Nesting and unnesting tokens. Actual implementation of nesting is done by pallets corresponding31//!   to token's collection type.32//!33//! ### Terminology34//!35//! - **Nesting:** Setting up parent-child relationship between tokens. Nested tokens are inhereting36//!   owner from their parent. There could be multiple levels of nesting. Token couldn't be nested in37//!   it's child token i.e. parent-child relationship graph shouldn't have38//!39//! - **Parent:** Token that current token is nested in.40//!41//! - **Owner:** Account that owns the token and all nested tokens.42//!43//! ## Interface44//!45//! ### Available Functions46//!47//! - `find_parent` - Find parent of the token. It could be an account or another token.48//! - `parent_chain` - Find chain of parents of the token.49//! - `find_topmost_owner` - Find account or token in the end of the chain of parents.50//! - `check_nesting` - Check if the token could be nested in the other token51//! - `nest_if_sent_to_token` - Nest the token in the other token52//! - `unnest_if_nested` - Unnest the token from the other token5354#![cfg_attr(not(feature = "std"), no_std)]5556use pallet_common::CommonCollectionOperations;57use pallet_common::{erc::CrossAccountId, eth::is_collection};58use sp_std::collections::btree_set::BTreeSet;5960use frame_support::dispatch::{DispatchError, DispatchResult, DispatchResultWithPostInfo};61use frame_support::fail;62pub use pallet::*;63use pallet_common::{dispatch::CollectionDispatch, CollectionHandle};64use up_data_structs::{CollectionId, TokenId, mapping::TokenAddressMapping, budget::Budget};6566#[cfg(feature = "runtime-benchmarks")]67pub mod benchmarking;68pub mod weights;6970pub type SelfWeightOf<T> = <T as crate::Config>::WeightInfo;7172#[frame_support::pallet]73pub mod pallet {74	use frame_support::Parameter;75	use frame_support::dispatch::{GetDispatchInfo, UnfilteredDispatchable};76	use frame_support::pallet_prelude::*;7778	use super::*;7980	#[pallet::error]81	pub enum Error<T> {82		/// While nesting, encountered an already checked account, detecting a loop.83		OuroborosDetected,84		/// While nesting, reached the depth limit of nesting, exceeding the provided budget.85		DepthLimit,86		/// While nesting, reached the breadth limit of nesting, exceeding the provided budget.87		BreadthLimit,88		/// Couldn't find the token owner that is itself a token.89		TokenNotFound,90		/// Tried to nest token under collection contract address, instead of token address91		CantNestTokenUnderCollection,92	}9394	#[pallet::event]95	pub enum Event<T> {96		/// Executed call on behalf of the token.97		Executed(DispatchResult),98	}99100	#[pallet::config]101	pub trait Config: frame_system::Config + pallet_common::Config {102		type WeightInfo: weights::WeightInfo;103		type RuntimeEvent: IsType<<Self as frame_system::Config>::RuntimeEvent> + From<Event<Self>>;104		type RuntimeCall: Parameter105			+ UnfilteredDispatchable<RuntimeOrigin = Self::RuntimeOrigin>106			+ GetDispatchInfo;107	}108109	#[pallet::pallet]110	pub struct Pallet<T>(_);111112	#[pallet::call]113	impl<T: Config> Pallet<T> {114		// #[pallet::weight({115		// 	let dispatch_info = call.get_dispatch_info();116117		// 	(118		// 		dispatch_info.weight119		// 			// Cost of dereferencing parent120		// 			.saturating_add(T::DbWeight::get().reads(2 * *max_depth as Weight))121		// 			.saturating_add(4000 * *max_depth as Weight),122		// 		dispatch_info.class)123		// })]124		// pub fn execute(125		// 	origin: OriginFor<T>,126		// 	call: Box<<T as Config>::Call>,127		// 	max_depth: u32,128		// ) -> DispatchResult {129	}130}131132#[derive(PartialEq)]133pub enum Parent<CrossAccountId> {134	/// Token owned by a normal account.135	User(CrossAccountId),136	/// Could not find the token provided as the owner.137	TokenNotFound,138	/// Token owner is another token (still, the target token may not exist).139	Token(CollectionId, TokenId),140}141142impl<T: Config> Pallet<T> {143	/// Find account owning the `token` or a token that the `token` is nested in.144	///145	/// Returns the enum that have three variants:146	/// - [`User`](crate::Parent<T>::User): Contains account.147	/// - [`Token`](crate::Parent<T>::Token): Contains token id and collection id.148	/// - [`TokenNotFound`](crate::Parent<T>::TokenNotFound): Indicates that parent was not found149	pub fn find_parent(150		collection: CollectionId,151		token: TokenId,152	) -> Result<Parent<T::CrossAccountId>, DispatchError> {153		// TODO: Reduce cost by not reading collection config154		let handle = match CollectionHandle::try_get(collection) {155			Ok(v) => v,156			Err(_) => return Ok(Parent::TokenNotFound),157		};158		let handle = T::CollectionDispatch::dispatch(handle);159		let handle = handle.as_dyn();160161		Ok(match handle.token_owner(token) {162			Some(owner) => match T::CrossTokenAddressMapping::address_to_token(&owner) {163				Some((collection, token)) => Parent::Token(collection, token),164				None => Parent::User(owner),165			},166			None => Parent::TokenNotFound,167		})168	}169170	/// Get the chain of parents of a token in the nesting hierarchy171	///172	/// Returns an iterator of addresses of the owning tokens and the owning account,173	/// starting from the immediate parent token, ending with the account.174	/// Returns error if cycle is detected.175	pub fn parent_chain(176		mut collection: CollectionId,177		mut token: TokenId,178	) -> impl Iterator<Item = Result<Parent<T::CrossAccountId>, DispatchError>> {179		let mut finished = false;180		let mut visited = BTreeSet::new();181		visited.insert((collection, token));182		core::iter::from_fn(move || {183			if finished {184				return None;185			}186			let parent = Self::find_parent(collection, token);187			match parent {188				Ok(Parent::Token(new_collection, new_token)) => {189					collection = new_collection;190					token = new_token;191					if !visited.insert((new_collection, new_token)) {192						finished = true;193						return Some(Err(<Error<T>>::OuroborosDetected.into()));194					}195				}196				_ => finished = true,197			}198			Some(parent as Result<_, DispatchError>)199		})200	}201202	/// Try to dereference address, until finding top level owner203	///204	/// May return token address if parent token not yet exists205	///206	/// - `budget`: Limit for searching parents in depth.207	pub fn find_topmost_owner(208		collection: CollectionId,209		token: TokenId,210		budget: &dyn Budget,211	) -> Result<T::CrossAccountId, DispatchError> {212		let owner = Self::parent_chain(collection, token)213			.take_while(|_| budget.consume())214			.find(|p| matches!(p, Ok(Parent::User(_) | Parent::TokenNotFound)))215			.ok_or(<Error<T>>::DepthLimit)??;216217		Ok(match owner {218			Parent::User(v) => v,219			_ => fail!(<Error<T>>::TokenNotFound),220		})221	}222223	/// Find the topmost parent and check that assigning `for_nest` token as a child for224	/// `token` wouldn't create a cycle.225	///226	/// - `budget`: Limit for searching parents in depth.227	pub fn get_checked_topmost_owner(228		collection: CollectionId,229		token: TokenId,230		for_nest: Option<(CollectionId, TokenId)>,231		budget: &dyn Budget,232	) -> Result<T::CrossAccountId, DispatchError> {233		// Tried to nest token in itself234		if Some((collection, token)) == for_nest {235			return Err(<Error<T>>::OuroborosDetected.into());236		}237238		for parent in Self::parent_chain(collection, token).take_while(|_| budget.consume()) {239			match parent? {240				// Tried to nest token in chain, which has this token as one of parents241				Parent::Token(collection, token) if Some((collection, token)) == for_nest => {242					return Err(<Error<T>>::OuroborosDetected.into())243				}244				// Token is owned by other user245				Parent::User(user) => return Ok(user),246				Parent::TokenNotFound => return Err(<Error<T>>::TokenNotFound.into()),247				// Continue parent chain248				Parent::Token(_, _) => {}249			}250		}251252		Err(<Error<T>>::DepthLimit.into())253	}254255	/// Burn token and all of it's nested tokens256	///257	/// - `self_budget`: Limit for searching children in depth.258	/// - `breadth_budget`: Limit of breadth of searching children.259	pub fn burn_item_recursively(260		from: T::CrossAccountId,261		collection: CollectionId,262		token: TokenId,263		self_budget: &dyn Budget,264		breadth_budget: &dyn Budget,265	) -> DispatchResultWithPostInfo {266		let handle = <CollectionHandle<T>>::try_get(collection)?;267		let dispatch = T::CollectionDispatch::dispatch(handle);268		let dispatch = dispatch.as_dyn();269		dispatch.burn_item_recursively(from.clone(), token, self_budget, breadth_budget)270	}271272	/// Check if `token` indirectly owned by `user`273	///274	/// Returns `true` if `user` is `token`'s owner. Or If token is provided as `user` then275	/// check that `user` and `token` have same owner.276	/// Checks that assigning `for_nest` token as a child for `token` wouldn't create a cycle.277	///278	/// - `budget`: Limit for searching parents in depth.279	pub fn check_indirectly_owned(280		user: T::CrossAccountId,281		collection: CollectionId,282		token: TokenId,283		for_nest: Option<(CollectionId, TokenId)>,284		budget: &dyn Budget,285	) -> Result<bool, DispatchError> {286		let target_parent = match T::CrossTokenAddressMapping::address_to_token(&user) {287			Some((collection, token)) => Self::find_topmost_owner(collection, token, budget)?,288			None => user,289		};290291		Self::get_checked_topmost_owner(collection, token, for_nest, budget)292			.map(|indirect_owner| indirect_owner == target_parent)293	}294295	/// Checks that `under` is valid token and that `token_id` could be nested under it296	/// and that `from` is `under`'s owner297	///298	/// Returns OK if `under` is not a token299	///300	/// - `nesting_budget`: Limit for searching parents in depth.301	pub fn check_nesting(302		from: T::CrossAccountId,303		under: &T::CrossAccountId,304		collection_id: CollectionId,305		token_id: TokenId,306		nesting_budget: &dyn Budget,307	) -> DispatchResult {308		Self::try_exec_if_token(under, |collection, parent_id| {309			collection.check_nesting(from, (collection_id, token_id), parent_id, nesting_budget)310		})311	}312313	/// Nests `token_id` under `under` token314	///315	/// Returns OK if `under` is not a token. Checks that nesting is possible.316	///317	/// - `nesting_budget`: Limit for searching parents in depth.318	pub fn nest_if_sent_to_token(319		from: T::CrossAccountId,320		under: &T::CrossAccountId,321		collection_id: CollectionId,322		token_id: TokenId,323		nesting_budget: &dyn Budget,324	) -> DispatchResult {325		Self::try_exec_if_token(under, |collection, parent_id| {326			collection.check_nesting(from, (collection_id, token_id), parent_id, nesting_budget)?;327328			collection.nest(parent_id, (collection_id, token_id));329330			Ok(())331		})332	}333334	/// Nests `token_id` under `owner` token335	///336	/// Caller should check that nesting wouldn't cause recursion in nesting337	pub fn nest_if_sent_to_token_unchecked(338		owner: &T::CrossAccountId,339		collection_id: CollectionId,340		token_id: TokenId,341	) {342		Self::exec_if_token(owner, |collection, parent_id| {343			collection.nest(parent_id, (collection_id, token_id))344		});345	}346347	/// Unnests `token_id` from `owner`.348	pub fn unnest_if_nested(349		owner: &T::CrossAccountId,350		collection_id: CollectionId,351		token_id: TokenId,352	) {353		if let Err(e) = Self::try_exec_if_token(owner, |collection, parent_id| {354			collection.unnest(parent_id, (collection_id, token_id));355			Ok(())356		}) {357			log::warn!("unnest precondition failed: {e:?}")358		}359	}360361	/// # Panics362	/// If [`Self::try_exec_if_token`] fails363	fn exec_if_token(364		account: &T::CrossAccountId,365		action: impl FnOnce(&dyn CommonCollectionOperations<T>, TokenId),366	) {367		Self::try_exec_if_token(account, |collection, id| {368			action(collection, id);369			Ok(())370		})371		.unwrap();372	}373374	/// If `account` is a token address, execute `action` providing found collection as an argument375	/// Token may not exist, it is expected it will be checked in the callback.376	fn try_exec_if_token(377		account: &T::CrossAccountId,378		action: impl FnOnce(&dyn CommonCollectionOperations<T>, TokenId) -> DispatchResult,379	) -> DispatchResult {380		if is_collection(&account.as_eth()) {381			fail!(<Error<T>>::CantNestTokenUnderCollection);382		}383		let Some((collection, token)) = T::CrossTokenAddressMapping::address_to_token(account) else {384			return Ok(())385		};386387		let handle = <CollectionHandle<T>>::try_get(collection)?;388389		let dispatch = T::CollectionDispatch::dispatch(handle);390		let dispatch = dispatch.as_dyn();391392		action(dispatch, token)393	}394}
modifiedprimitives/data-structs/src/lib.rsdiffbeforeafterboth
--- a/primitives/data-structs/src/lib.rs
+++ b/primitives/data-structs/src/lib.rs
@@ -1099,6 +1099,13 @@
 	EmptyPropertyKey,
 }
 
+/// Token owner error: it could be either `NotFound` ot `MultipleOwners`.
+#[derive(Debug)]
+pub enum TokenOwnerError {
+	NotFound,
+	MultipleOwners,
+}
+
 /// Marker for scope of property.
 ///
 /// Scoped property can't be changed by user. Used for external collections.
modifiedruntime/common/runtime_apis.rsdiffbeforeafterboth
--- a/runtime/common/runtime_apis.rs
+++ b/runtime/common/runtime_apis.rs
@@ -16,11 +16,11 @@
 
 #[macro_export]
 macro_rules! dispatch_unique_runtime {
-	($collection:ident.$method:ident($($name:ident),*)) => {{
+	($collection:ident.$method:ident($($name:ident),*) $($rest:tt)*) => {{
 		let collection = <Runtime as pallet_common::Config>::CollectionDispatch::dispatch(<pallet_common::CollectionHandle<Runtime>>::try_get($collection)?);
 		let dispatch = collection.as_dyn();
 
-		Ok::<_, DispatchError>(dispatch.$method($($name),*))
+		Ok::<_, DispatchError>(dispatch.$method($($name),*) $($rest)*)
 	}};
 }
 
@@ -73,7 +73,7 @@
                 }
 
                 fn token_owner(collection: CollectionId, token: TokenId) -> Result<Option<CrossAccountId>, DispatchError> {
-                    dispatch_unique_runtime!(collection.token_owner(token))
+                    dispatch_unique_runtime!(collection.token_owner(token).ok())
                 }
 
                 fn token_owners(collection: CollectionId, token: TokenId) -> Result<Vec::<CrossAccountId>, DispatchError>  {
@@ -83,7 +83,7 @@
                 fn topmost_token_owner(collection: CollectionId, token: TokenId) -> Result<Option<CrossAccountId>, DispatchError> {
                     let budget = up_data_structs::budget::Value::new(10);
 
-                    Ok(Some(<pallet_structure::Pallet<Runtime>>::find_topmost_owner(collection, token, &budget)?))
+                    Ok(<pallet_structure::Pallet<Runtime>>::find_topmost_owner(collection, token, &budget)?)
                 }
                 fn token_children(collection: CollectionId, token: TokenId) -> Result<Vec<TokenChild>, DispatchError> {
                     Ok(<pallet_nonfungible::Pallet<Runtime>>::token_children_ids(collection, token))
modifiedtests/src/nesting/nest.test.tsdiffbeforeafterboth
--- a/tests/src/nesting/nest.test.ts
+++ b/tests/src/nesting/nest.test.ts
@@ -15,7 +15,7 @@
 // along with Unique Network. If not, see <http://www.gnu.org/licenses/>.
 
 import {IKeyringPair} from '@polkadot/types/types';
-import {expect, itSub, usingPlaygrounds} from '../util';
+import {expect, itSub, Pallets, usingPlaygrounds} from '../util';
 
 describe('Integration Test: Composite nesting tests', () => {
   let alice: IKeyringPair;
@@ -138,7 +138,7 @@
   before(async () => {
     await usingPlaygrounds(async (helper, privateKey) => {
       const donor = await privateKey({filename: __filename});
-      [alice, bob, charlie] = await helper.arrange.createAccounts([50n, 10n, 10n], donor);
+      [alice, bob, charlie] = await helper.arrange.createAccounts([200n, 10n, 10n], donor);
     });
   });
 
@@ -288,6 +288,38 @@
     await collectionFT.transfer(charlie, targetToken.nestingAccount(), 2n);
     expect(await collectionFT.getBalance(targetToken.nestingAccount())).to.be.equal(7n);
   });
+
+  itSub.ifWithPallets('ReFungible: getTopmostOwner works correctly with Nesting', [Pallets.ReFungible], async({helper}) => {
+    const collectionNFT = await helper.nft.mintCollection(alice, {
+      permissions: {
+        nesting: {
+          tokenOwner: true,
+        },
+      },
+    });
+    const collectionRFT = await helper.rft.mintCollection(alice);
+
+    const nft = await collectionNFT.mintToken(alice, {Substrate: alice.address});
+    const rft = await collectionRFT.mintToken(alice, 100n, {Substrate: alice.address});
+
+    expect(await rft.getTopmostOwner()).deep.equal({Substrate: alice.address});
+
+    await rft.transfer(alice, nft.nestingAccount(), 40n);
+
+    expect(await rft.getTopmostOwner()).deep.equal(null);
+
+    await rft.transfer(alice, nft.nestingAccount(), 60n);
+
+    expect(await rft.getTopmostOwner()).deep.equal({Substrate: alice.address});
+
+    await rft.transferFrom(alice, nft.nestingAccount(), {Substrate: alice.address}, 30n);
+
+    expect(await rft.getTopmostOwner()).deep.equal(null);
+
+    await rft.transferFrom(alice, nft.nestingAccount(), {Substrate: alice.address}, 70n);
+
+    expect(await rft.getTopmostOwner()).deep.equal({Substrate: alice.address});
+  });
 });
 
 describe('Negative Test: Nesting', () => {