Transaction not yet indexed

521Tqt7T7acW8V2RrPNACafm9LiF3SHPjZiBeFCeiTDLsi9AkgSTiCeFBMfqwx8RdomR9i7jsi61jC3MMf813jz9

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