Transaction not yet indexed

5c21LyKBs7o2NyNLJ54LBzZpUxAqMqVeNAFdCcK239hUUXMbxkrYgNLvAtxLF8JC8v5bnGLv78HJzBtiDsGcc978

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