From 8bbc7539fcb323d48ed7e702bf60144d2e94f29c Mon Sep 17 00:00:00 2001
From: str-mv <strmax20@gmail.com>
Date: Fri, 08 Apr 2022 05:56:38 +0000
Subject: [PATCH] CORE-178


---
--- a/client/rpc/src/lib.rs
+++ b/client/rpc/src/lib.rs
@@ -119,6 +119,15 @@
 	) -> Result<Option<Collection<AccountId>>>;
 	#[rpc(name = "unique_collectionStats")]
 	fn collection_stats(&self, at: Option<BlockHash>) -> Result<CollectionStats>;
+
+	#[rpc(name = "unique_nextSponsored")]
+	fn next_sponsored(
+		&self,
+		collection: CollectionId,
+		account: CrossAccountId,
+		token: TokenId,
+		at: Option<BlockHash>,
+	) -> Result<Option<u64>>;
 }
 
 pub struct Unique<C, P> {
@@ -222,4 +231,5 @@
 	pass_method!(last_token_id(collection: CollectionId) -> TokenId);
 	pass_method!(collection_by_id(collection: CollectionId) -> Option<Collection<AccountId>>);
 	pass_method!(collection_stats() -> CollectionStats);
+	pass_method!(next_sponsored(collection: CollectionId, account: CrossAccountId, token: TokenId) -> Option<u64>);
 }
--- a/pallets/unique/src/lib.rs
+++ b/pallets/unique/src/lib.rs
@@ -69,7 +69,7 @@
 
 mod eth;
 mod sponsorship;
-pub use sponsorship::UniqueSponsorshipHandler;
+pub use sponsorship::{UniqueSponsorshipHandler, UniqueSponsorshipPredict};
 pub use eth::sponsoring::UniqueEthSponsorshipHandler;
 
 pub use eth::UniqueErcSupport;
@@ -84,6 +84,12 @@
 pub mod weights;
 use weights::WeightInfo;
 
+pub trait SponsorshipPredict<T: Config> {
+	fn predict(collection: CollectionId, account: T::CrossAccountId, token: TokenId) -> Option<u64>
+	where
+		u64: From<<T as frame_system::Config>::BlockNumber>;
+}
+
 decl_error! {
 	/// Error for non-fungible-token module.
 	pub enum Error for Module<T: Config> {
--- a/pallets/unique/src/sponsorship.rs
+++ b/pallets/unique/src/sponsorship.rs
@@ -301,3 +301,80 @@
 		}
 	}
 }
+
+use crate::SponsorshipPredict;
+use up_data_structs::SponsorshipState;
+pub struct UniqueSponsorshipPredict<T>(PhantomData<T>);
+
+impl<T> SponsorshipPredict<T> for UniqueSponsorshipPredict<T>
+where
+	T: Config,
+{
+	fn predict(collection_id: CollectionId, who: T::CrossAccountId, token: TokenId) -> Option<u64>
+	where
+		u64: From<<T as frame_system::Config>::BlockNumber>,
+	{
+		let collection = <CollectionHandle<T>>::try_get(collection_id).ok()?;
+
+		// preliminary sponsoring correctness check
+		match collection.sponsorship {
+			SponsorshipState::Disabled | SponsorshipState::Unconfirmed(_) => return None,
+			_ => (),
+		}
+
+		// sponsor timeout
+		let block_number = <frame_system::Pallet<T>>::block_number() as T::BlockNumber;
+		let limit = collection
+			.limits
+			.sponsor_transfer_timeout(match collection.mode {
+				CollectionMode::NFT => NFT_SPONSOR_TRANSFER_TIMEOUT,
+				CollectionMode::Fungible(_) => FUNGIBLE_SPONSOR_TRANSFER_TIMEOUT,
+				CollectionMode::ReFungible => REFUNGIBLE_SPONSOR_TRANSFER_TIMEOUT,
+			});
+
+		let last_tx_block = match collection.mode {
+			CollectionMode::NFT => <NftTransferBasket<T>>::get(collection.id, token),
+			CollectionMode::Fungible(_) => {
+				<FungibleTransferBasket<T>>::get(collection.id, who.as_sub())
+			}
+			CollectionMode::ReFungible => {
+				<ReFungibleTransferBasket<T>>::get((collection.id, token, who.as_sub()))
+			}
+		};
+
+		if let Some(last_tx_block) = last_tx_block {
+			let timeout = last_tx_block + limit.into();
+			if block_number < timeout {
+				return Some((timeout - block_number).into());
+			}
+			return Some(0);
+		}
+
+		let token_exists = match collection.mode {
+			CollectionMode::NFT => {
+				<pallet_nonfungible::TokenData<T>>::contains_key((collection.id, token))
+			}
+			CollectionMode::Fungible(_) => true,
+			CollectionMode::ReFungible => {
+				<pallet_refungible::TotalSupply<T>>::contains_key((collection.id, token))
+			}
+		};
+
+		if token_exists {
+			Some(0)
+		} else {
+			None
+		}
+
+		// // existance check
+		// match collection.mode {
+		// 	CollectionMode::NFT => <NftTransferBasket<T>>::get(collection.id, token),
+		// 	CollectionMode::Fungible(_) => {
+		// 		<FungibleTransferBasket<T>>::get(collection.id, who.as_sub())
+		// 	}
+		// 	CollectionMode::ReFungible => {
+		// 		<ReFungibleTransferBasket<T>>::get((collection.id, token, who.as_sub()))
+		// 	}
+		// };
+	}
+}
--- a/primitives/rpc/src/lib.rs
+++ b/primitives/rpc/src/lib.rs
@@ -59,5 +59,6 @@
 		fn last_token_id(collection: CollectionId) -> Result<TokenId>;
 		fn collection_by_id(collection: CollectionId) -> Result<Option<Collection<AccountId>>>;
 		fn collection_stats() -> Result<CollectionStats>;
+		fn next_sponsored(collection: CollectionId, account: CrossAccountId, token: TokenId) -> Result<Option<u64>>;
 	}
 }
--- a/runtime/common/src/runtime_apis.rs
+++ b/runtime/common/src/runtime_apis.rs
@@ -69,6 +69,13 @@
                 fn collection_stats() -> Result<CollectionStats, DispatchError> {
                     Ok(<pallet_common::Pallet<Runtime>>::collection_stats())
                 }
+                fn next_sponsored(collection: CollectionId, account: CrossAccountId, token: TokenId) -> Result<Option<u64>, DispatchError> {
+                    Ok(<pallet_unique::UniqueSponsorshipPredict<Runtime> as
+                            pallet_unique::SponsorshipPredict<Runtime>>::predict(
+                        collection,
+                        account,
+                        token))
+                }
             }
 
             impl sp_api::Core<Block> for Runtime {
--- a/tests/src/interfaces/augment-api-rpc.ts
+++ b/tests/src/interfaces/augment-api-rpc.ts
@@ -619,6 +619,10 @@
        * Get token variable metadata
        **/
       variableMetadata: AugmentedRpc<(collection: u32 | AnyNumber | Uint8Array, tokenId: u32 | AnyNumber | Uint8Array, at?: Hash | string | Uint8Array) => Observable<Bytes>>;
+      /**
+       * nextSponsored transaction
+       **/
+      nextSponsored: AugmentedRpc<(collection: u32 | AnyNumber | Uint8Array,  account: PalletCommonAccountBasicCrossAccountIdRepr | { Substrate: any } | { Ethereum: any } | string | Uint8Array, tokenId: u32 | AnyNumber | Uint8Array, at?: Hash | string | Uint8Array) => Observable<Option<u64>>>;
     };
     web3: {
       /**
--- a/tests/src/interfaces/unique/definitions.ts
+++ b/tests/src/interfaces/unique/definitions.ts
@@ -55,5 +55,6 @@
     collectionById: fun('Get collection by specified id', [collectionParam], 'Option<UpDataStructsCollection>'),
     collectionStats: fun('Get collection stats', [], 'UpDataStructsCollectionStats'),
     allowed: fun('Check if user is allowed to use collection', [collectionParam, crossAccountParam()], 'bool'),
+    nextSponsored: fun('Check if user is allowed to use collection', [collectionParam, crossAccountParam(), tokenParam], 'Option<u64>'),
   },
 };

-- 
gitstuff