Transaction not yet indexed

21Si16vCFBqo6Qyc6ueHxKLYb2YWaz3DMxxizN4n42MsKj6C4JxBziUUVDtJAXHTvVfwp4XfFxffUR625bDmpW9H

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