Below is a dialogue between software developers, the first one used ChatGPT in his solution of code task and makes a comment,   the second one gives him reply on his solution. Write a reply that appropriately answers the comment.

### Comment:
notes on how to build a token bucket limiting system its actually quite similar to the semaphore and subsequently lockbox. you start with a token bucket, then you make a collection of token buckets keyed by a string.### Reply:
ive been thinking about this some more. if the relaying node is a bad actor then it can make anything up. so theres no point doing any authentication since the relay can just lie about it. any signed message can be fabricated and challengeresponse can be lied about as well. basically, a relay node can pretend to be a relay for any number of made up requesting nodes. so any kind of authentication or message signing is pointless here.right now the requestee node only does a single punch attempt at a time to a node. right now its keyed on ipport tuple but that still allows multiple attempts to an address if you just change the port number. so i think we need to rate limit on the ip address as well.any rate limiting beyond that needs to work in a distributed way, and im not sure theres an easy solution to that? i dont think the token bucket addresses that.the only thing i can think of that could works is make a single request mildly expensive to make with proof of work. so long as its expensive to make a lot of requests to hole punch a single target then it should be fine. so a request can include a mildy expensive to generate nonce with it. this may have to be generated as a challenge so there needs to be some back a forth between the two nodes through the relay. or, the punching node can track recently used nonces and reject any replays.in any case, we can think on this a little more. i dont want to implement anything were not sure on and the authentication is not critical to testing and .