Transaction not yet indexed

55k21zXMjH445DcAQD7H8rA4FrLwNkBYvKyFFNqdkN8pNH15D4Ehqsr8HwCBxwz4P2dN274NAKz7Uo4DbnJ7BgbA

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