Implement default display name for sorting

schema.graphql

@@ -160,6 +160,8 @@ type GraphAccount @entity {
   defaultName: GraphAccountName # Can optimize in future by checking ENS & others to make sure they still own the name
   "Time the account was created"
   createdAt: Int!
+  "Default display name is the current default name. Used for filtered queries"
+  defaultDisplayName: String # this is new***************************
 
   # IPFS Metadata
   "True if it is an organization. False if it is an individual"

src/mappings/gns.ts

@@ -58,6 +58,7 @@ export function handleSetDefaultName(event: SetDefaultName): void {
   // the good name with null
   if (newDefaultName != null) {
     graphAccount.defaultName = newDefaultName
+    graphAccount.defaultDisplayName = event.params.name
   }
   graphAccount.save()
 }