libp2p / libp2p/go-libp2p-pubsub

Allow per-topic message size limits

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#209 2 comments 0 reactions 0 assignees View on GitHub

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req:filecoin
Dominant language
Go
Stars
364
Forks
221
PR merge metrics
No merged PRs in 30d

Description

I'd like to be able to configure a maximum message size per topic. For example, filecoin transactions should never be larger than 32k, but block messages might be larger than that.

I don't want to have to read the entire object from the other peer into memory before i drop it, I should be able to detect the message is too big, and then either kill the connection, or discard the bytes as they come in.

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

The issue names no files or tests. Start by tracing the pubsub message receive path and how topics are configured; define where a per-topic limit can reject or discard oversized messages before the full object is buffered, then verify both connection-closing and byte-discarding behavior.

Written by the indexing model from the issue text.

Assessment

Tech stack
go
Domain
distributed-systems, networking
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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