git.delta.rocks / unique-network / refs/commits / b69837dd758f

1#![cfg_attr(not(feature = "std"), no_std)]23use sp_std::collections::btree_set::BTreeSet;45use frame_support::dispatch::DispatchError;6use frame_support::fail;7pub use pallet::*;8use pallet_common::{dispatch::CollectionDispatch, CollectionHandle};9use up_data_structs::{CollectionId, TokenId, mapping::TokenAddressMapping, budget::Budget};1011#[cfg(feature = "runtime-benchmarks")]12pub mod benchmarking;13pub mod weights;1415pub type SelfWeightOf<T> = <T as crate::Config>::WeightInfo;1617#[frame_support::pallet]18pub mod pallet {19	use frame_support::Parameter;20	use frame_support::dispatch::{GetDispatchInfo, UnfilteredDispatchable};21	use frame_support::pallet_prelude::*;22	use frame_system::pallet_prelude::*;2324	use super::*;2526	#[pallet::error]27	pub enum Error<T> {28		/// While searched for owner, got already checked account29		OuroborosDetected,30		/// While searched for owner, encountered depth limit31		DepthLimit,32		/// While searched for owner, found token owner by not-yet-existing token33		TokenNotFound,34	}3536	#[pallet::event]37	pub enum Event<T> {38		/// Executed call on behalf of token39		Executed(DispatchResult),40	}4142	#[pallet::config]43	pub trait Config: frame_system::Config + pallet_common::Config {44		type WeightInfo: weights::WeightInfo;45		type Event: IsType<<Self as frame_system::Config>::Event> + From<Event<Self>>;46		type Call: Parameter + UnfilteredDispatchable<Origin = Self::Origin> + GetDispatchInfo;47	}4849	#[pallet::pallet]50	pub struct Pallet<T>(_);5152	#[pallet::call]53	impl<T: Config> Pallet<T> {54		// #[pallet::weight({55		// 	let dispatch_info = call.get_dispatch_info();5657		// 	(58		// 		dispatch_info.weight59		// 			// Cost of dereferencing parent60		// 			.saturating_add(T::DbWeight::get().reads(2 * *max_depth as Weight))61		// 			.saturating_add(4000 * *max_depth as Weight),62		// 		dispatch_info.class)63		// })]64		// pub fn execute(65		// 	origin: OriginFor<T>,66		// 	call: Box<<T as Config>::Call>,67		// 	max_depth: u32,68		// ) -> DispatchResult {69	}70}7172#[derive(PartialEq)]73pub enum Parent<CrossAccountId> {74	/// Token owned by normal account75	Normal(CrossAccountId),76	/// Passed token not found77	TokenNotFound,78	/// Token owner is another token (target token still may not exist)79	Token(CollectionId, TokenId),80}8182impl<T: Config> Pallet<T> {83	pub fn find_parent(84		collection: CollectionId,85		token: TokenId,86	) -> Result<Parent<T::CrossAccountId>, DispatchError> {87		// TODO: Reduce cost by not reading collection config88		let handle = match CollectionHandle::try_get(collection) {89			Ok(v) => v,90			Err(_) => return Ok(Parent::TokenNotFound),91		};92		let handle = T::CollectionDispatch::dispatch(handle);93		let handle = handle.as_dyn();9495		Ok(match handle.token_owner(token) {96			Some(owner) => match T::CrossTokenAddressMapping::address_to_token(&owner) {97				Some((collection, token)) => Parent::Token(collection, token),98				None => Parent::Normal(owner),99			},100			None => Parent::TokenNotFound,101		})102	}103104	pub fn parent_chain(105		mut collection: CollectionId,106		mut token: TokenId,107	) -> impl Iterator<Item = Result<Parent<T::CrossAccountId>, DispatchError>> {108		let mut finished = false;109		let mut visited = BTreeSet::new();110		visited.insert((collection, token));111		core::iter::from_fn(move || {112			if finished {113				return None;114			}115			let parent = Self::find_parent(collection, token);116			match parent {117				Ok(Parent::Token(new_collection, new_token)) => {118					collection = new_collection;119					token = new_token;120					if !visited.insert((new_collection, new_token)) {121						finished = true;122						return Some(Err(<Error<T>>::OuroborosDetected.into()));123					}124				}125				_ => finished = true,126			}127			Some(parent as Result<_, DispatchError>)128		})129	}130131	/// Try to dereference address, until finding top level owner132	///133	/// May return token address if parent token not yet exists134	pub fn find_topmost_owner(135		collection: CollectionId,136		token: TokenId,137		budget: &dyn Budget,138	) -> Result<T::CrossAccountId, DispatchError> {139		let owner = Self::parent_chain(collection, token)140			.take_while(|_| budget.consume())141			.find(|p| matches!(p, Ok(Parent::Normal(_) | Parent::TokenNotFound)))142			.ok_or(<Error<T>>::DepthLimit)??;143144		Ok(match owner {145			Parent::Normal(v) => v,146			_ => fail!(<Error<T>>::TokenNotFound),147		})148	}149150	/// Check if token indirectly owned by specified user151	pub fn indirectly_owned(152		user: T::CrossAccountId,153		collection: CollectionId,154		token: TokenId,155		budget: &dyn Budget,156	) -> Result<bool, DispatchError> {157		let target_parent = match T::CrossTokenAddressMapping::address_to_token(&user) {158			Some((collection, token)) => Parent::Token(collection, token),159			None => Parent::Normal(user),160		};161162		Ok(Self::parent_chain(collection, token)163			.take_while(|_| budget.consume())164			.any(|parent| Ok(&target_parent) == parent.as_ref()))165	}166}