implement anvil_enableTraces

[cyberthirst]

Component

Anvil

Describe the feature you would like

Hi! Would it be possible to implement anvil_enableTraces?

It is listed in the Foundry book, but it isn't currently implemented.

We at https://github.com/Ackee-Blockchain/woke are developing a testing framework and want to return return_data of the transaction to the user. We need to execute the transaction and then query the traces using the tx_hash. We would like to do it in one step.

Additional context

No response

[sambacha]

This would basically be like simulating a tx (the response object would use the same inputs) which was shot down by @onbjerg - @mattsse can correct me on this

[orenyomtov]

Hey @sambacha @onbjerg @mattsse - are there any plans on implementing this?

[mattsse]

uh, this is indeed listed in the book,

can't remember what this endpoint is supposed to do.
Do you know a reference for an example response?

[orenyomtov]

I don't think a reference ever existed

I'm basically using it for simulating a tx, now I'm sending:

1. eth_sendTransaction
2. eth_getTransactioReceipt (in loop till result != null)
3. trace_transaction/ots_getInternalOperations

It would be nice to have it all in one request

Bonus points if the tx is just simulated like debug_traceCall and not actually mined
geth for example enables this it with debug_traceCall and { tracer: 'callTracer', tracerConfig: { withLog: true } }

[zerosnacks]

This is indeed missing the implementation

foundry/crates/anvil/src/eth/api.rs

Lines 2058 to 2065 in fbd2251

	/// Turn on call traces for transactions that are returned to the user when they execute a
	/// transaction (instead of just txhash/receipt)
	///
	/// Handler for ETH RPC call: `anvil_enableTraces`
	pub async fn anvil_enable_traces(&self) -> Result<()> {
	node_info!("anvil_enableTraces");
	Err(BlockchainError::RpcUnimplemented)
	}

Once implemented can also be added as a method in Alloy's provider ext: https://github.com/alloy-rs/alloy/blob/761909b7cab8cc131ac22a6095f70686b113e2fa/crates/provider/src/ext/anvil.rs#L15