Sector-checker tool kit [lotus-checker] developed by Filecash community 
(https://github.com/filecash/lotus/tree/filecash/v0.9.0/cmd/sector-checker)：
- Verify sector windowPost
- Acknowledgement of [irocn](https://github.com/irocn/sector-checker) for sector-checker source code provision
- Attribute to rectinajh and hooops's integration of  sector-checker into filecash. 
We genuinely appreciate such project optimization contributions from the community.