Summary

Storage variables "s_linkToken", "kittyConnect", "gasLimit" can be made immutable.

Vulnerability Details

Those variables are getting initialized once in the constructor on the contract initialization therefore having them as immutable will save the contract some gas and will apply best practices.

Impact

Low

Tools Used

Part Slither and part manual review.

Recommendations

Make storage variables immutable and add "i_" before the name to scope with best practices for naming conventions.