Transaction not yet indexed

21MC5tP5hmASuY9sLZhbAJ7EGwjaubNdhtu6PyNmqLVdt5RiYcfFcC2PWaZ6ynsHcfPsLP5dkZ1uXrSL8Dz5BP11

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