Check whether a Filecoin worker-key rotation has taken effect
A provider changing its worker address can see both an existing and a proposed key in actor state. Signing automation needs to distinguish the active worker from the pending change.
Read the change record
Inspect Worker, NewWorker and WorkerChangeEpoch for the provider. Compare the returned addresses against the intended key rotation and retain the observed chain epoch.
{"jsonrpc":"2.0","id":1,"method":"Filecoin.StateMinerInfo","params":["f01234",[]]}
Verify activation explicitly
When a pending address appears, monitor the required transition and read the active Worker again before routing work to the replacement signer. An elapsed change epoch by itself is insufficient evidence that the new address is active. Owner and ControlAddresses represent separate roles.