feat(cast): parse custom errors from cast send with local artifacts

[holic]

Component

Cast

Describe the feature you would like

I noticed cast call and cast run can now be run with local artifacts (#7359)

Is it possible to do the same thing for cast send? Right now I get a response like

Error: server returned an error response: error code 3: execution reverted: custom error 0xfdde54e2: 223429fa00000000000000000000000000000000000000000000000000000000, data: "0xfdde54e2223429fa00000000000000000000000000000000000000000000000000000000"

It'd be great if the custom error could be parsed via my local artifacts (which does have this selector).

Additional context

No response

[grandizzy]

hey @holic there's now the cast decode-error you could use to decode such, you can try suggestion here #8860 (comment)

[holic]

Great to know! Any reason this can't be done automatically?

[grandizzy]

for run and call we're simulating tx and decode from traces, what you see in cast send above is the response from provider (anvil) when trying to estimate tx gas (if you set your gas limit e.g. --gas-limit 1111111 you'll get a receipt for failed tx)
We could probably improve here

foundry/crates/cast/bin/tx.rs

Lines 369 to 371 in dbf1c2a

	if self.tx.gas.is_none() {
	self.tx.gas = Some(self.provider.estimate_gas(&self.tx).await?);
	}

but not sure there's anything standard we could use to parse and decode, @mattsse could you pls chime in? thanks!

[holic]

I dug through Viem's error handling code and looks like they look for error code 3 and a message containing execution reverted. Then if they find hex data in the error, they treat it as a custom error and attempt to decode the error with the provided ABI, otherwise they fallback to message:
https://github.com/wevm/viem/blob/c2f85790e9f7e55214bf46bc302bf55ba1a43a6b/src/errors/request.ts#L87
https://github.com/wevm/viem/blob/c2f85790e9f7e55214bf46bc302bf55ba1a43a6b/src/utils/errors/getContractError.ts#L67
https://github.com/wevm/viem/blob/c2f85790e9f7e55214bf46bc302bf55ba1a43a6b/src/errors/contract.ts#L194

They also link out to all the eth node sources of errors: https://github.com/wevm/viem/blob/c2f85790e9f7e55214bf46bc302bf55ba1a43a6b/src/errors/node.ts#L5-L13
(Though these links seem outdated now)

[grandizzy]

awesome info, should do it