tron driver removed

api/gateway/chain/storage/model/wallet.go

@@ -61,11 +61,15 @@ func (*WalletBalance) Collection() string {
 // ManagedWalletFilter describes list filters.
 type ManagedWalletFilter struct {
 	OrganizationRef string
-	OwnerRef        string
-	Network         string
-	TokenSymbol     string
-	Cursor          string
-	Limit           int32
+	// OwnerRefFilter is a 3-state filter:
+	// - nil: no filter on owner_ref (return all)
+	// - pointer to empty string: filter for wallets where owner_ref is empty
+	// - pointer to a value: filter for wallets where owner_ref matches
+	OwnerRefFilter *string
+	Network        string
+	TokenSymbol    string
+	Cursor         string
+	Limit          int32
 }
 
 // ManagedWalletList contains paginated wallet results.