Transaction not yet indexed

21t4bUhaRQpLs7h6BAdSRgtEscuEfbqaGvHiDU9o7bNSwJWM2eFSXfKQUQKG7M6u258baB2XkkRsn8gfawNtiyVH

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