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feat(mux-tracer): Support JS tracer in MUX tracer. #291

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feat(mux-tracer): Support JS tracer in MUX tracer. #291

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f0f15f7
feat(mux-tracer): Support JS tracer in MUX tracer.
kustrun May 13, 2025
e02d2de
feat(mux-inspector): Enable conditional support for JS tracer, so Mux…
kustrun May 14, 2025
13b218c
feat(mux-inspector): fmt
kustrun May 14, 2025
a203c39
feat(mux-inspector): Use feature specific match, instead of general one.
kustrun May 14, 2025
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25 changes: 17 additions & 8 deletions src/tracing/js/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -54,6 +54,8 @@ pub const RECURSION_LIMIT: usize = 10_000;
#[derive(Debug)]
pub struct JsInspector {
ctx: Context,
/// The javascript code provided to the inspector.
code: String,
/// The javascript config provided to the inspector.
_js_config_value: JsValue,
/// The input config object.
Expand Down Expand Up @@ -126,9 +128,10 @@ impl JsInspector {
register_builtins(&mut ctx)?;

// evaluate the code
let code = format!("({code})");
let obj =
ctx.eval(Source::from_bytes(code.as_bytes())).map_err(JsInspectorError::EvalCode)?;
let code_to_evaluate = format!("({code})");
let obj = ctx
.eval(Source::from_bytes(code_to_evaluate.as_bytes()))
.map_err(JsInspectorError::EvalCode)?;

let obj = obj.as_object().cloned().ok_or(JsInspectorError::ExpectedJsObject)?;

Expand Down Expand Up @@ -178,6 +181,7 @@ impl JsInspector {

Ok(Self {
ctx,
code,
_js_config_value,
config,
obj,
Expand All @@ -192,6 +196,11 @@ impl JsInspector {
})
}

/// Returns the javascript code.
pub const fn code(&self) -> &String {
&self.code
}

/// Returns the config object.
pub const fn config(&self) -> &serde_json::Value {
&self.config
Expand Down Expand Up @@ -219,7 +228,7 @@ impl JsInspector {
/// Note: This is supposed to be called after the inspection has finished.
pub fn json_result<DB>(
&mut self,
res: ResultAndState<impl HaltReasonTr>,
res: &ResultAndState<impl HaltReasonTr>,
tx: &impl Transaction,
block: &impl Block,
db: &DB,
Expand All @@ -235,7 +244,7 @@ impl JsInspector {
/// Calls the result function and returns the result.
pub fn result<TX, DB>(
&mut self,
res: ResultAndState<impl HaltReasonTr>,
res: &ResultAndState<impl HaltReasonTr>,
tx: &TX,
block: &impl Block,
db: &DB,
Expand All @@ -258,7 +267,7 @@ impl JsInspector {
output_bytes = Some(out);
}
Output::Create(out, addr) => {
to = addr;
to = addr.clone();
output_bytes = Some(out);
}
},
Expand Down Expand Up @@ -293,7 +302,7 @@ impl JsInspector {
value: tx.value(),
block: block.number(),
coinbase: block.beneficiary(),
output: output_bytes.unwrap_or_default(),
output: output_bytes.unwrap_or_default().clone(),
time: block.timestamp().to_string(),
intrinsic_gas: 0,
transaction_ctx: self.transaction_context,
Expand Down Expand Up @@ -718,7 +727,7 @@ mod tests {

assert_eq!(res.result.is_success(), success);
let (ctx, inspector) = evm.ctx_inspector();
inspector.json_result(res, ctx.tx(), ctx.block(), ctx.db_ref()).unwrap()
inspector.json_result(&res, ctx.tx(), ctx.block(), ctx.db_ref()).unwrap()
}

#[test]
Expand Down
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