From 2ea8e6dfd7e9dba7ac4fa9cdd23a8cdd0d190715 Mon Sep 17 00:00:00 2001
From: Szegoo <sakacszergej@gmail.com>
Date: Sat, 30 Dec 2023 17:57:44 +0100
Subject: [PATCH] Add missing view functions

---
 chain-extensions/pallet-uniques/src/lib.rs    | 45 ++++++++++++++++---
 .../pallet-uniques/src/weights.rs             | 10 +++++
 2 files changed, 50 insertions(+), 5 deletions(-)

diff --git a/chain-extensions/pallet-uniques/src/lib.rs b/chain-extensions/pallet-uniques/src/lib.rs
index ebf285853b..745998df88 100644
--- a/chain-extensions/pallet-uniques/src/lib.rs
+++ b/chain-extensions/pallet-uniques/src/lib.rs
@@ -20,10 +20,14 @@
 
 pub mod weights;
 
-use frame_support::traits::nonfungibles::{Inspect, InspectEnumerable};
+use frame_support::traits::{
+    nonfungibles::{Inspect, InspectEnumerable},
+    Currency,
+};
 use pallet_contracts::chain_extension::{
     ChainExtension, Environment, Ext, InitState, RetVal, SysConfig,
 };
+use pallet_uniques::{CollectionDetails, ItemDetails};
 use parity_scale_codec::Encode;
 use sp_runtime::traits::StaticLookup;
 use sp_runtime::BoundedVec;
@@ -33,6 +37,8 @@ use sp_std::vec::Vec;
 use uniques_chain_extension_types::Outcome;
 
 type AccountIdLookup<T> = <<T as SysConfig>::Lookup as StaticLookup>::Source;
+type DepositBalanceOf<T> =
+    <<T as pallet_uniques::Config>::Currency as Currency<<T as SysConfig>::AccountId>>::Balance;
 
 enum UniquesFunc {
     Owner,
@@ -40,6 +46,8 @@ enum UniquesFunc {
     Attribute,
     CollectionAttribute,
     CanTransfer,
+    Collection,
+    Item,
     Collections,
     Items,
     Owned,
@@ -56,10 +64,12 @@ impl TryFrom<u16> for UniquesFunc {
             3 => Ok(UniquesFunc::Attribute),
             4 => Ok(UniquesFunc::CollectionAttribute),
             5 => Ok(UniquesFunc::CanTransfer),
-            6 => Ok(UniquesFunc::Collections),
-            7 => Ok(UniquesFunc::Items),
-            8 => Ok(UniquesFunc::Owned),
-            9 => Ok(UniquesFunc::OwnedInCollection),
+            6 => Ok(UniquesFunc::Collection),
+            7 => Ok(UniquesFunc::Item),
+            8 => Ok(UniquesFunc::Collections),
+            9 => Ok(UniquesFunc::Items),
+            10 => Ok(UniquesFunc::Owned),
+            11 => Ok(UniquesFunc::OwnedInCollection),
             _ => Err(DispatchError::Other(
                 "Unimplemented func_id for UniquesFunc",
             )),
@@ -150,6 +160,31 @@ where
                 let can_transfer = pallet_uniques::Pallet::<T>::can_transfer(&collection_id, &item);
                 env.write(&can_transfer.encode(), false, None)?;
             }
+            UniquesFunc::Collection => {
+                let collection_id: <T as pallet_uniques::Config>::CollectionId = env.read_as()?;
+
+                let collection: Option<CollectionDetails<T::AccountId, DepositBalanceOf<T>>> =
+                    pallet_uniques::Collection::<T>::get(&collection_id);
+
+                let base_weight = <W as weights::WeightInfo>::collection();
+                env.charge_weight(base_weight)?;
+
+                env.write(&collection.encode(), false, None)?;
+            }
+            UniquesFunc::Item => {
+                let (collection_id, item_id): (
+                    <T as pallet_uniques::Config>::CollectionId,
+                    <T as pallet_uniques::Config>::ItemId,
+                ) = env.read_as()?;
+
+                let item: Option<ItemDetails<T::AccountId, DepositBalanceOf<T>>> =
+                    pallet_uniques::Item::<T>::get(&collection_id, &item_id);
+
+                let base_weight = <W as weights::WeightInfo>::item();
+                env.charge_weight(base_weight)?;
+
+                env.write(&item.encode(), false, None)?;
+            }
             UniquesFunc::Collections => {
                 let read_bound: u32 = env.read_as()?;
 
diff --git a/chain-extensions/pallet-uniques/src/weights.rs b/chain-extensions/pallet-uniques/src/weights.rs
index fb847b3abb..69d1328e63 100644
--- a/chain-extensions/pallet-uniques/src/weights.rs
+++ b/chain-extensions/pallet-uniques/src/weights.rs
@@ -30,6 +30,8 @@ pub trait WeightInfo {
     fn attribute() -> Weight;
     fn collection_attribute() -> Weight;
     fn can_transfer() -> Weight;
+    fn collection() -> Weight;
+    fn item() -> Weight;
     fn collections(n: u32) -> Weight;
     fn items(n: u32) -> Weight;
     fn owned(n: u32) -> Weight;
@@ -59,6 +61,14 @@ impl<T: frame_system::Config> WeightInfo for SubstrateWeight<T> {
         T::DbWeight::get().reads(2 as u64)
     }
 
+    fn collection() -> Weight {
+        T::DbWeight::get().reads(1 as u64)
+    }
+
+    fn item() -> Weight {
+        T::DbWeight::get().reads(1 as u64)
+    }
+
     fn collections(n: u32) -> Weight {
         T::DbWeight::get().reads(1 as u64).saturating_mul(n.into())
     }