Transaction not yet indexed

Xn88PBQYHTdFYgEAwacAeDxAsRX1CAraeQBJi7FTFQJthaGfj6RQBTopQgwWLXooTvyT3qFu9L3qN6DiKmq4sP9

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