Transaction not yet indexed

668c1LzKT3KX4KQdpvtEScMCSpHHyAx4RJZ1ueHkSZH6u4SQbgh79yTsRE2JMF163eT6fmY4KQerxyUWdf5XvAtN

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