Description
_tempTokenToCheck checks that the balance of the ConnextRouter does not change after having received tokens in xReceive(...) . This variable is unnecessary as the tokensToCheck variable of _bundleInternal(...) could be created before the _bundleInternal(...) call and passed as argument.
Recommendation
In the ConnextRouter, create the tokensToCheck variable in the xReceive(...) function and pass it as argument to xBundleConnext(...), which should pass it as argument to _bundleInternal(...). In the BaseRouter, create the tokensToCheck variable in xBundle(...) and pass it as argument to _bundleInternal(...).
Status
Addressed here: Fujicracy/fuji-v2#622