Caldera Sepolia RPC issue - minimal reproduction

Overview

This reproduces the issue with events emitted by contracts deployed with MUD.

The gist is that a viem publicClient.watchEvents listener won't always catch events, so it will miss some logs, that are actually present in the block. In fact, it will miss most of the logs, and only be triggered sporadically.

This started happening early this week/end of last week.

When creating multiple publicClient.watchEvents over the same client, it happens that one of them will be triggered while the others won't.

Reproduction

The App contains the logic for the reproduction. It just creates both a publicClient.watchEvents and a publicClient.watchBlocks listeners. The first one will increment whenever it receives an event, and the second one will increment whenever it receives a block that contains some logs. The contract increment function is called every 10 seconds (and you can call it manually on the page).

How to run

Run quickly

git clone git@github.com:primodiumxyz/caldera-rpc-bug-minimal-reproduction.git
pnpm i
cd packages/client && pnpm vite

Then visit: http://localhost:3000/?chainId=10017&worldAddress=0x9565c1406c82603df445b901a8e284c3b67b1d53&initialBlockNumber=11044578

Deploy

If you would like to deploy on another chain:

1. Add the chain to the config.
2. Add the deploy command as well as the deployment profile.
3. Update PRIVATE_KEY in packages/contracts/.env.
4. Run your deploy command.
5. Update the params in the URL (chainId, worldAddress, initialBlockNumber) to match the deployment (see in worlds.json).