fix(tracing/js): error not set in result_fn (paradigmxyz#222)

We only set step's error, but missing the result's one. 


use this tx to test it

```json
{
  "jsonrpc": "2.0",
  "method": "debug_traceTransaction",
  "id": "1",
  "params": [
    "0x18ba7c5bcb851072612c0451377f55ac4ef83986ec8d9f87a2ce07c9a7d6371f", 
	{
      "tracer": "{ fault: function() {}, result: function(ctx, _) { return { error: !!ctx.error }; } }"
    }
  ]
}
```

for geth/erigon's response is:

```json
{
  "id": "1",
  "jsonrpc": "2.0",
  "result": {
    "error": true
  }
}
```

currently reth's response is:

```json
{
  "id": "1",
  "jsonrpc": "2.0",
  "result": {
    "error": false
  }
}
```

---------

Signed-off-by: jsvisa <delweng@gmail.com>

src/tracing/js/bindings.rs

@@ -672,9 +672,11 @@ pub(crate) struct JsEvmContext {
     /// Number, block number
     pub(crate) block: u64,
     pub(crate) output: Bytes,
-    /// Number, block number
+    /// Number, block timestamp
     pub(crate) time: String,
     pub(crate) transaction_ctx: TransactionContext,
+    /// returns information about the error if one occurred, otherwise returns undefined
+    pub(crate) error: Option<String>,
 }
 
 impl JsEvmContext {
@@ -693,6 +695,7 @@ impl JsEvmContext {
             output,
             time,
             transaction_ctx,
+            error,
         } = self;
         let obj = JsObject::default();
 
@@ -724,6 +727,9 @@ impl JsEvmContext {
         if let Some(tx_hash) = transaction_ctx.tx_hash {
             obj.set(js_string!("txHash"), to_byte_array(tx_hash.0, ctx)?, false, ctx)?;
         }
+        if let Some(error) = error {
+            obj.set(js_string!("error"), js_string!(error), false, ctx)?;
+        }
 
         Ok(obj)
     }

src/tracing/js/mod.rs

@@ -236,6 +236,7 @@ impl JsInspector {
         let gas_used = result.gas_used();
         let mut to = None;
         let mut output_bytes = None;
+        let mut error = None;
         match result {
             ExecutionResult::Success { output, .. } => match output {
                 Output::Call(out) => {
@@ -247,17 +248,21 @@ impl JsInspector {
                 }
             },
             ExecutionResult::Revert { output, .. } => {
+                error = Some("execution reverted".to_string());
                 output_bytes = Some(output);
             }
-            ExecutionResult::Halt { .. } => {}
+            ExecutionResult::Halt { reason, .. } => {
+                error = Some(format!("execution halted: {:?}", reason));
+            }
         };
 
+        if let TransactTo::Call(target) = env.tx.transact_to {
+            to = Some(target);
+        }
+
         let ctx = JsEvmContext {
             r#type: match env.tx.transact_to {
-                TransactTo::Call(target) => {
-                    to = Some(target);
-                    "CALL"
-                }
+                TransactTo::Call(_) => "CALL",
                 TransactTo::Create => "CREATE",
             }
             .to_string(),
@@ -273,6 +278,7 @@ impl JsInspector {
             time: env.block.timestamp.to_string(),
             intrinsic_gas: 0,
             transaction_ctx: self.transaction_context,
+            error,
         };
         let ctx = ctx.into_js_object(&mut self.ctx)?;
         let db = db.into_js_object(&mut self.ctx)?;

tests/it/geth.rs

@@ -16,6 +16,9 @@ use revm::{
 };
 use revm_inspectors::tracing::{MuxInspector, TracingInspector, TracingInspectorConfig};
 
+#[cfg(feature = "js-tracer")]
+use revm_inspectors::tracing::js::JsInspector;
+
 #[test]
 fn test_geth_calltracer_logs() {
     /*
@@ -335,3 +338,104 @@ fn test_geth_inspector_reset() {
         1000000
     );
 }
+
+#[test]
+#[cfg(feature = "js-tracer")]
+fn test_geth_jstracer_revert() {
+    /*
+    pragma solidity ^0.8.13;
+
+    contract Foo {
+        event Log(address indexed addr, uint256 value);
+
+        function foo() external {
+            emit Log(msg.sender, 0);
+        }
+
+        function bar() external {
+            emit Log(msg.sender, 0);
+            require(false, "barbarbar");
+        }
+    }
+    */
+
+    let code = hex!("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");
+    let deployer = Address::ZERO;
+
+    let mut db = CacheDB::new(EmptyDB::default());
+
+    let cfg = CfgEnvWithHandlerCfg::new(CfgEnv::default(), HandlerCfg::new(SpecId::CANCUN));
+
+    let env = EnvWithHandlerCfg::new_with_cfg_env(
+        cfg.clone(),
+        BlockEnv::default(),
+        TxEnv {
+            caller: deployer,
+            gas_limit: 1000000,
+            transact_to: TransactTo::Create,
+            data: code.into(),
+            ..Default::default()
+        },
+    );
+
+    let mut insp = TracingInspector::new(TracingInspectorConfig::default_geth());
+
+    // Create contract
+    let (res, _) = inspect(&mut db, env, &mut insp).unwrap();
+    let addr = match res.result {
+        ExecutionResult::Success { output, .. } => match output {
+            Output::Create(_, addr) => addr.unwrap(),
+            _ => panic!("Create failed"),
+        },
+        _ => panic!("Execution failed: {:?}", res.result),
+    };
+    db.commit(res.state);
+
+    let code = r#"
+{
+    fault: function() {},
+    result: function(ctx) { return { error: !!ctx.error }; },
+}"#;
+
+    // test with normal operation
+    let env = EnvWithHandlerCfg::new_with_cfg_env(
+        cfg.clone(),
+        BlockEnv::default(),
+        TxEnv {
+            caller: deployer,
+            gas_limit: 1000000,
+            transact_to: TransactTo::Call(addr),
+            data: hex!("c2985578").into(), // call foo
+            ..Default::default()
+        },
+    );
+    let mut insp = JsInspector::new(code.to_string(), serde_json::Value::Null).unwrap();
+    let (res, _) = inspect(&mut db, env.clone(), &mut insp).unwrap();
+    assert!(res.result.is_success());
+
+    let result = insp.json_result(res, &env, &db).unwrap();
+
+    // sucessful operation
+    assert!(!result["error"].as_bool().unwrap());
+
+    // test with reverted operation
+    let env = EnvWithHandlerCfg::new_with_cfg_env(
+        cfg,
+        BlockEnv::default(),
+        TxEnv {
+            caller: deployer,
+            gas_limit: 1000000,
+            transact_to: TransactTo::Call(addr),
+            data: hex!("febb0f7e").into(), // call bar
+            ..Default::default()
+        },
+    );
+    let mut insp = JsInspector::new(code.to_string(), serde_json::Value::Null).unwrap();
+    let (res, _) = inspect(&mut db, env.clone(), &mut insp).unwrap();
+    assert!(!res.result.is_success());
+
+    let result = insp.json_result(res, &env, &db).unwrap();
+
+    // reverted operation
+    assert!(result["error"].as_bool().unwrap());
+}