Transaction not yet indexed

21Xu6168kZPzSfa7bybkru7RfBGvALFaioaT3GVmUd1LLcpvUCqLSTGPwjvBYXSAW7ZvC9p8ya1EG5iLMd4cLBGs

The transaction signature is valid but not yet indexed by this RPC node, or the transaction failed before inclusion.