Transaction not yet indexed

491EB18F5fKExAQn8msbBNXY9PV4JQaewuaEGeKBWadEaQW6c8YSQH676UqjFtDeynHgHYFEkGp6pW65j578ZFuT

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