Perhaps adding support for companiesreloaded for chest shop transactions logs. Perhaps make it so the command is
/csn phistory or /csn chistory | After looking at our DM'S on spigot, you could make it based only company owners can check for company transactions logs.

After thinking a bit about this it is really something that the plugin providing the grouping feature would have to implement as this plugin has no idea with which id any other plugin implements their shops. (Also any other commands e.g. for clearing would have to have equivalents too)

The only solution I could think about is to hook into ChestShop to check access to certain usernames when checking if someone should be allowed to check other shop owner's history.