Transaction not yet indexed

1287Sm8sDE9duCffKbJjkBcApqrZMKMdo3CuConrxWgUJMTLDH4pMVSdEX4ZvMmeJ3uXcPW6HsGuCwoMMWNAritT

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