Transaction not yet indexed

668SsC8TsZ1gEC9vdsnk8H4YWB5mntAYuZb4M2dRMFqAXhfBtsw5mUdc2wgGCeQ8kuMTBWfj9ni8AVMERXsJpwB2

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