Transaction not yet indexed

421Sig9T8NPKq7qXHWTNMTPNZAMBcyQLwN2Fd37wBDWSGVc1YPkW9bF3DKMn9zpA2SQLQXL9biW39w2MXqnk81zz

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