feat: rate limit with rln configuration

[kaichaosun]

Description

Support RLN contract's configuration like: allow 100 messages per 1 minute.

[DO NOT MERGE] Use this PR to test 1:1 with RLN
The default rate limiter is used when not configured, so this PR is safe to be merged.

Changes

• create a new custom rate limiter with refill at certain interval strategy

[status-im-auto]

Jenkins Builds

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❔	Commit	#️⃣	Finished (UTC)	Duration	Platform	Result
✔️	37affd2	#1	2024-12-03 07:25:39	~2 min	unknown	📄log
✔️	4908959	#2	2024-12-03 07:27:51	~2 min	unknown	📄log
✔️	b6cf713	#3	2024-12-03 07:32:23	~2 min	unknown	📄log
✔️	76309b2	#4	2024-12-05 07:20:31	~2 min	unknown	📄log

❔	Commit	#️⃣	Finished (UTC)	Duration	Platform	Result
✔️	1bcb412	#5	2024-12-17 01:25:15	~2 min	unknown	📄log
✔️	6b6cd5f	#6	2024-12-18 06:45:14	~2 min	unknown	📄log

[chaitanyaprem]

@kaichaosun i am guessing this is for some sort of testing and analysis because RLN already the logic to accept/reject msgs based on rate limit, if so better not to merge it. Would it be required for both lightclient and relay?

Would be helpful if you can give more context as to what this change is meant to be used for.

Also iiuc RLN integration is supposed to be done for 1:1 chats first right. if so, wondering if we should introduce this limiter at such lower layer or a higher layer in status-go where we can distinguish 1:1 chats and community chats.

[kaichaosun]

@chaitanyaprem this PR/branch is used for 1:1 chat with RLN, updated the description to reflect its purpose.
Also it would be good to get feedback about the implementation.

[chaitanyaprem]

Rate limiter logic looks good to me, but i am surprised golang's default rate-limiter doesn't support any other interval other than rate/sec.

[kaichaosun]

maybe we can use some build flag to choose between default or RLN Rate limiter?

Using a config in status-go seems better, and pass the rate limiter as needed.

[richard-ramos]

Interesting implementation of a rate limiter!

[kaichaosun]

cc @richard-ramos for another review.

[chaitanyaprem]

LGTM

wondering if default rate-limit is fine for community owner node or will it run into any issues?

[kaichaosun]

wondering if default rate-limit is fine for community owner node or will it run into any issues?

The default rate limit is 5 messages per second and burst into 10, which was added previously and already used by status-go. Actually the old default config is 2 messages per second before #1267, and deployed via status-im/status-go#5523.