Transaction not yet indexed

MD18cgSZdFFFLtG7CJ9DUD3rTTPD3vp5KEHUSYeKZRFy56Z1ZQy9ExLfnzG8pGwhKxzEagXhZKHrNFkuriRmjSw

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