Transaction not yet indexed

521JftGErs4FfY7jQ2Edb3QsjxA5e4fmB266u7j9vk1BUeSwudJsHHALV3QSaGiShvbW7j5g81vsr3Kpqm9759bn

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