Hey @Mindphreaker, yeah, it’s a bug (in the help menu and error msg at this point, I just checked the code and we definitely don’t support a SafeKey as source but only a Wallet). I’ll be raising it to either support that (which I’d prefer) or change the msg. Thanks a lot!
Regarding the wallet transfer args order, some similar discussions and info is here, but overall you are thinking in similar terms of those previous comments and discussions, we just didn’t address this issue yet.