Multicall aggregate analytics

[hammeiam]

Is there any way to debug or otherwise analyze the amount of calls that are being bundled into multicall calls, short of inspected my RPC provider logs? I'd love to do a before/after comparison. I'd also love to validate on my own that both contract.read and publicClient.readContract calls get bundled the same way. I could also see this helping people to pick an optimized multicall.wait value.

[jxom]

Eventually we could have onRequest/onResponse callbacks that you can pass to the viem Transports to hook in for analysis.

[fubhy]

I would very much like to see that for both performance metrics, analytics and generic tracing support: #261

Definitely also for calls, but especially for sending transactions, understanding where there are bottlenecks, frequent errors / error clusters is crucial for building good UXs on top of such a dynamic, stateful environment as the blockchain.