add a metadata view to designate an nft as a pack

contracts/MetadataViews.cdc

@@ -695,6 +695,28 @@ pub contract MetadataViews {
         }
     }
 
+    // Taken from GaiaPackNFT https://flow-view-source.com/mainnet/account/0xfdae91e14e960079/contract/GaiaPackNFT
+    // AllDay Packs have a subset of these so it should be safe to use this more verbose set
+    pub enum PackStatus: UInt8 {
+        pub case Sealed
+        pub case RevealRequested
+        pub case Revealed
+        pub case OpenRequested
+        pub case Opened
+    }
+
+    pub struct Pack {
+        pub let status: PackStatus
+
+        pub fun isOpen(): Bool {
+            return self.status == PackStatus.Opened
+        }
+
+        init(_ status: PackStatus) {
+            self.status = status
+        }
+    }
+
     /// Helper to get Traits view in a typesafe way
     ///
     /// @param viewResolver: A reference to the resolver resource

docs/MetdataViews/MetadataViews_Pack.md

@@ -0,0 +1,32 @@
+# Struct `Pack`
+
+```cadence
+pub struct Pack {
+    pub let status: PackStatus
+
+}
+```
+
+View to return the status of an nft if it is a pack.
+
+NOTE: **This view should only be supported if it is a pack**
+
+### Initializer
+
+```cadence
+init(_ status: PackStatus)
+```
+
+
+## Functions
+
+### `isOpened()`
+
+```cadence
+pub fun isOpen(): Bool
+```
+Returns a boolean marking whether this pack has been opened or not
+
+Parameters: None
+
+---