toJson method
Implementation
Map<String, dynamic> toJson() => {
"id": id,
"external_id": externalId,
"amount": amount,
"description": description,
"qr_string": qrString,
"callback_url": callbackUrl,
"type": type,
"status": status,
"created": created.toIso8601String(),
"updated": updated.toIso8601String(),
"metadata": metadata,
};