Summary

The router and link input parameters from the constructor should have their values validated, so that the bridge functionality works as supposed.

Vulnerability Details

Any of the router and link input parameters can be mistakenly set to address(0), causing problems in the bridge functionality when deploying KittyBridge smart contract.

Impact

Bridge functionality will not work if any of those inputs has address(0) as value.

Tools Used

Manual review

Recommendations

Validate that none of those parameters is address(0).