inspect role for nonfungibles_v2 (#14341)

* inspect role

* Update frame/nfts/src/impl_nonfungibles.rs

Co-authored-by: Jegor Sidorenko <5252494+jsidorenko@users.noreply.github.com>

* Update frame/support/src/traits/tokens/nonfungibles_v2.rs

Co-authored-by: Jegor Sidorenko <5252494+jsidorenko@users.noreply.github.com>

* Update as suggested

* Update frame/nfts/src/impl_nonfungibles.rs

Co-authored-by: Jegor Sidorenko <5252494+jsidorenko@users.noreply.github.com>

* Update frame/nfts/src/impl_nonfungibles.rs

Co-authored-by: Jegor Sidorenko <5252494+jsidorenko@users.noreply.github.com>

* Update frame/nfts/src/impl_nonfungibles.rs

Co-authored-by: Jegor Sidorenko <5252494+jsidorenko@users.noreply.github.com>

---------

Co-authored-by: Jegor Sidorenko <5252494+jsidorenko@users.noreply.github.com>

substrate/frame/nfts/src/impl_nonfungibles.rs

@@ -135,6 +135,18 @@ impl<T: Config<I>, I: 'static> Inspect<<T as SystemConfig>::AccountId> for Palle
 	}
 }
 
+impl<T: Config<I>, I: 'static> InspectRole<<T as SystemConfig>::AccountId> for Pallet<T, I> {
+	fn is_issuer(collection: &Self::CollectionId, who: &<T as SystemConfig>::AccountId) -> bool {
+		Self::has_role(collection, who, CollectionRole::Issuer)
+	}
+	fn is_admin(collection: &Self::CollectionId, who: &<T as SystemConfig>::AccountId) -> bool {
+		Self::has_role(collection, who, CollectionRole::Admin)
+	}
+	fn is_freezer(collection: &Self::CollectionId, who: &<T as SystemConfig>::AccountId) -> bool {
+		Self::has_role(collection, who, CollectionRole::Freezer)
+	}
+}
+
 impl<T: Config<I>, I: 'static> Create<<T as SystemConfig>::AccountId, CollectionConfigFor<T, I>>
 	for Pallet<T, I>
 {

substrate/frame/support/src/traits/tokens/nonfungibles_v2.rs

@@ -180,6 +180,16 @@ pub trait InspectEnumerable<AccountId>: Inspect<AccountId> {
 	) -> Self::OwnedInCollectionIterator;
 }
 
+/// Trait for providing an interface to check the account's role within the collection.
+pub trait InspectRole<AccountId>: Inspect<AccountId> {
+	/// Returns `true` if `who` is the issuer of the `collection`.
+	fn is_issuer(collection: &Self::CollectionId, who: &AccountId) -> bool;
+	/// Returns `true` if `who` is the admin of the `collection`.
+	fn is_admin(collection: &Self::CollectionId, who: &AccountId) -> bool;
+	/// Returns `true` if `who` is the freezer of the `collection`.
+	fn is_freezer(collection: &Self::CollectionId, who: &AccountId) -> bool;
+}
+
 /// Trait for providing the ability to create collections of nonfungible items.
 pub trait Create<AccountId, CollectionConfig>: Inspect<AccountId> {
 	/// Create a `collection` of nonfungible items to be owned by `who` and managed by `admin`.