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.

api/gateway/chain/storage/mongo/store/wallets.go

@@ -156,9 +156,10 @@ func (w *Wallets) List(ctx context.Context, filter model.ManagedWalletFilter) (*
 		query = query.Filter(repository.Field("organizationRef"), org)
 		fields = append(fields, zap.String("organization_ref", org))
 	}
-	if owner := strings.TrimSpace(filter.OwnerRef); owner != "" {
-		query = query.Filter(repository.Field("ownerRef"), owner)
-		fields = append(fields, zap.String("owner_ref", owner))
+	if filter.OwnerRefFilter != nil {
+		ownerRef := strings.TrimSpace(*filter.OwnerRefFilter)
+		query = query.Filter(repository.Field("ownerRef"), ownerRef)
+		fields = append(fields, zap.String("owner_ref_filter", ownerRef))
 	}
 	if network := strings.TrimSpace(filter.Network); network != "" {
 		normalized := strings.ToLower(network)