Last week @RareSkills_io dropped a gas puzzle to implement the ERC165's `supportsInterface()` method that returns true/false depending on the input param.
The gas consumption should not exceed 46 gas.
Only a few were able to solve the challenge in time.
A quick 🧵
1/7 Extra bytecode size doesn't always cost you additional gas. Checkout @w1nt3r_eth's write-up!