Transaction not yet indexed

mpmc19NAQtjmaZpnafPbvaqooScjzzoex2fQzc8imDxUvaGd4yJKoSU79Nz4wL3PqpB7Jr3VnaQk4ZS2yb1pFXs

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