With the improvements in
https://github.com/digitalbitbox/bitbox-bridge/pull/4/files we can now
correctly distinguish what kind of response the bridge returns and
invoke the appropriate error, sich as "Origin not whitelisted" when
the brdige returns 403
With the improvements in https://github.com/digitalbitbox/bitbox-bridge/pull/4/files we can now correctly distinguish what kind of response the bridge returns and invoke the appropriate error, sich as "Origin not whitelisted" when the brdige returns 403