Transaction not yet indexed

RMmstJL21DTQuQZw2cE4UznRCJ2ruMMuVg6rjNLegXeYK9PGUVvyTDusF2Z9vpyfiUtv2WoScaYNrMhdEBbFRJ6

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