feat: new estimate method

crates/contracts/src/entry_point.rs

@@ -15,17 +15,19 @@ use super::{
     },
     tracer::JS_TRACER,
 };
-use crate::{error::decode_revert_error, gen::ExecutionResult};
+use crate::{error::decode_revert_error, executor_tracer::EXECUTOR_TRACER, gen::ExecutionResult};
 use ethers::{
     prelude::{ContractError, Event},
     providers::Middleware,
     types::{
-        Address, Bytes, GethDebugTracerType, GethDebugTracingCallOptions, GethDebugTracingOptions,
-        GethTrace, TransactionRequest, U256,
+        spoof, transaction::eip2718::TypedTransaction, Address, Bytes, GethDebugTracerType,
+        GethDebugTracingCallOptions, GethDebugTracingOptions, GethTrace, TransactionRequest, U256,
     },
 };
 use std::sync::Arc;
 
+const UINT96_MAX: u128 = 5192296858534827628530496329220095;
+
 #[derive(Clone, Debug, PartialEq, Eq)]
 pub enum SimulateValidationResult {
     ValidationResult(ValidationResult),
@@ -133,6 +135,43 @@ impl<M: Middleware + 'static> EntryPoint<M> {
         Ok(res)
     }
 
+    pub async fn simulate_handle_op_trace<U: Into<UserOperation>>(
+        &self,
+        uo: U,
+    ) -> Result<GethTrace, EntryPointError> {
+        let uo = uo.into();
+        let max_fee_per_gas = uo.max_fee_per_gas;
+        let call = self.entry_point_api.simulate_handle_op(uo, Address::zero(), Bytes::default());
+        let mut tx: TypedTransaction = call.tx;
+        tx.set_from(Address::zero());
+        tx.set_gas_price(max_fee_per_gas);
+        tx.set_gas(u64::MAX);
+        let res = self
+            .eth_client
+            .debug_trace_call(
+                tx,
+                None,
+                GethDebugTracingCallOptions {
+                    tracing_options: GethDebugTracingOptions {
+                        disable_storage: None,
+                        disable_stack: None,
+                        enable_memory: None,
+                        enable_return_data: None,
+                        tracer: Some(GethDebugTracerType::JsTracer(EXECUTOR_TRACER.into())),
+                        tracer_config: None,
+                        timeout: None,
+                    },
+                    state_overrides: Some(spoof::balance(Address::zero(), UINT96_MAX.into())),
+                },
+            )
+            .await
+            .map_err(|e| {
+                EntryPointError::from_middleware_error::<M>(e).expect_err("trace err is expected")
+            })?;
+
+        Ok(res)
+    }
+
     pub async fn handle_ops<U: Into<UserOperation>>(
         &self,
         uos: Vec<U>,

crates/contracts/src/error.rs

@@ -15,6 +15,10 @@ pub enum EntryPointError {
     #[error("{0}")]
     FailedOp(FailedOp),
 
+    /// execution reverted
+    #[error("execution reverted: {0}")]
+    ExecutionReverted(String),
+
     /// There is no revert when there should be
     #[error("{function} should revert")]
     NoRevert {
@@ -129,23 +133,25 @@ impl EntryPointError {
         Err(Self::Provider { inner: format!("middleware error: {err:?}") })
     }
 }
-
+// ethers-rs could not handle `require (true, "reason")` or `revert("test failed")` well in this
+// case revert with `require` error would ends up with error event signature `0x08c379a0`
+// we need to handle it manually
+pub fn decode_revert_string(data: Bytes) -> Option<String> {
+    let (error_sig, reason) = data.split_at(4);
+    if error_sig == [0x08, 0xc3, 0x79, 0xa0] {
+        <String as AbiDecode>::decode(reason).ok()
+    } else {
+        None
+    }
+}
 pub fn decode_revert_error(data: Bytes) -> Result<EntryPointAPIErrors, EntryPointError> {
     let decoded = EntryPointAPIErrors::decode(data.as_ref());
     match decoded {
         Ok(res) => Ok(res),
         Err(e) => {
-            // ethers-rs could not handle `require (true, "reason")` well in this case
-            // revert with `require` error would ends up with error event signature `0x08c379a0`
-            // we need to handle it manually
-            let (error_sig, reason) = data.split_at(4);
-            if error_sig == [0x08, 0xc3, 0x79, 0xa0] {
-                return <String as AbiDecode>::decode(reason)
-                    .map(EntryPointAPIErrors::RevertString)
-                    .map_err(|e| EntryPointError::Decode {
-                        inner: format!("data field can't be deserialized to revert error: {e:?}",),
-                    });
-            }
+            if let Some(error_str) = decode_revert_string(data) {
+                return Ok(EntryPointAPIErrors::RevertString(error_str));
+            };
 
             Err(EntryPointError::Decode {
                 inner: format!(

crates/contracts/src/executor_tracer.rs

@@ -0,0 +1,208 @@
+use ethers::types::GethTrace;
+use eyre::format_err;
+use serde::Deserialize;
+
+#[derive(Debug, Clone, Default, PartialEq, Eq, Deserialize)]
+pub struct LogInfo {
+    pub topics: Vec<String>,
+    pub data: String,
+}
+#[derive(Debug, Clone, Default, PartialEq, Eq, Deserialize)]
+pub struct ExecutorTracerResult {
+    pub reverts: Vec<String>,
+    #[serde(rename = "validationOOG")]
+    pub validation_oog: bool,
+    #[serde(rename = "executionOOG")]
+    pub execution_oog: bool,
+    #[serde(rename = "executionGasLimit")]
+    pub execution_gas_limit: u64,
+    #[serde(rename = "userOperationEvent")]
+    pub user_op_event: Option<LogInfo>,
+    #[serde(rename = "userOperationRevertEvent")]
+    pub user_op_revert_event: Option<LogInfo>,
+    pub output: String,
+    pub error: String,
+}
+impl TryFrom<GethTrace> for ExecutorTracerResult {
+    type Error = eyre::Error;
+    fn try_from(val: GethTrace) -> Result<Self, Self::Error> {
+        match val {
+            GethTrace::Known(val) => Err(format_err!("Invalid geth trace: {val:?}")),
+            GethTrace::Unknown(val) => serde_json::from_value(val.clone())
+                .map_err(|error| format_err!("Failed to parse geth trace: {error}, {val:#}")),
+        }
+    }
+}
+pub const EXECUTOR_TRACER: &str = r#"
+{
+    reverts: [],
+    validationOOG: false,
+    executionOOG: false,
+    executionGasLimit: 0,
+  
+    _depth: 0,
+    _executionGasStack: [],
+    _defaultGasItem: { used: 0, required: 0 },
+    _marker: 0,
+    _validationMarker: 1,
+    _executionMarker: 3,
+    _userOperationEventTopics0:
+      "0x49628fd1471006c1482da88028e9ce4dbb080b815c9b0344d39e5a8e6ec1419f",
+    _userOperationRevertEventTopics0:
+      "0x1c4fada7374c0a9ee8841fc38afe82932dc0f8e69012e927f061a8bae611a201",
+  
+    _isValidation: function () {
+      return (
+        this._marker >= this._validationMarker &&
+        this._marker < this._executionMarker
+      );
+    },
+  
+    _isExecution: function () {
+      return this._marker === this._executionMarker;
+    },
+  
+    _isUserOperationEvent: function (log) {
+      var topics0 = "0x" + log.stack.peek(2).toString(16);
+      return topics0 === this._userOperationEventTopics0;
+    },
+  
+    _setUserOperationEvent: function (opcode, log) {
+      var count = parseInt(opcode.substring(3));
+      var ofs = parseInt(log.stack.peek(0).toString());
+      var len = parseInt(log.stack.peek(1).toString());
+      var topics = [];
+      for (var i = 0; i < count; i++) {
+        topics.push(log.stack.peek(2 + i).toString(16));
+      }
+      var data = toHex(log.memory.slice(ofs, ofs + len));
+      this.userOperationEvent = {
+        topics: topics,
+        data: data,
+      };
+    },
+  
+    _isUserOperationRevertEvent: function (log) {
+      var topics0 = "0x" + log.stack.peek(2).toString(16);
+      return topics0 === this._userOperationRevertEventTopics0;
+    },
+  
+    _setUserOperationRevertEvent: function (opcode, log) {
+      var count = parseInt(opcode.substring(3));
+      var ofs = parseInt(log.stack.peek(0).toString());
+      var len = parseInt(log.stack.peek(1).toString());
+      var topics = [];
+      for (var i = 0; i < count; i++) {
+        topics.push(log.stack.peek(2 + i).toString(16));
+      }
+      var data = toHex(log.memory.slice(ofs, ofs + len));
+      this.userOperationRevertEvent = {
+        topics: topics,
+        data: data,
+      };
+    },
+    fault: function fault(log, db) {},
+    result: function result(ctx, db) {
+      return {
+        reverts: this.reverts,
+        validationOOG: this.validationOOG,
+        executionOOG: this.executionOOG,
+        executionGasLimit: this.executionGasLimit,
+        userOperationEvent: this.userOperationEvent,
+        userOperationRevertEvent: this.userOperationRevertEvent,
+        output: toHex(ctx.output),
+        error: ctx.error,
+      };
+    },
+  
+    enter: function enter(frame) {
+      if (this._isExecution()) {
+        var next = this._depth + 1;
+        if (this._executionGasStack[next] === undefined)
+          this._executionGasStack[next] = Object.assign({}, this._defaultGasItem);
+      }
+    },
+    exit: function exit(frame) {
+      if (this._isExecution()) {
+        if (frame.getError() !== undefined) {
+          this.reverts.push(toHex(frame.getOutput()));
+        }
+  
+        if (this._depth >= 2) {
+          // Get the final gas item for the nested frame.
+          var nested = Object.assign(
+            {},
+            this._executionGasStack[this._depth + 1] || this._defaultGasItem
+          );
+  
+          // Reset the nested gas item to prevent double counting on re-entry.
+          this._executionGasStack[this._depth + 1] = Object.assign(
+            {},
+            this._defaultGasItem
+          );
+  
+          // Keep track of the total gas used by all frames at this depth.
+          // This does not account for the gas required due to the 63/64 rule.
+          var used = frame.getGasUsed();
+          this._executionGasStack[this._depth].used += used;
+  
+          // Keep track of the total gas required by all frames at this depth.
+          // This accounts for additional gas needed due to the 63/64 rule.
+          this._executionGasStack[this._depth].required +=
+            used - nested.used + Math.ceil((nested.required * 64) / 63);
+  
+          // Keep track of the final gas limit.
+          this.executionGasLimit = this._executionGasStack[this._depth].required;
+        }
+      }
+    },
+  
+    step: function step(log, db) {
+      var opcode = log.op.toString();
+      this._depth = log.getDepth();
+      if (this._depth === 1 && opcode === "NUMBER") this._marker++;
+  
+      if (
+        this._depth <= 2 &&
+        opcode.startsWith("LOG") &&
+        this._isUserOperationEvent(log)
+      )
+        this._setUserOperationEvent(opcode, log);
+      if (
+          this._depth <= 2 &&
+          opcode.startsWith("LOG") &&
+          this._isUserOperationRevertEvent(log)
+        )
+          this._setUserOperationRevertEvent(opcode, log);
+    
+      if (log.getGas() < log.getCost() && this._isValidation())
+        this.validationOOG = true;
+  
+      if (log.getGas() < log.getCost() && this._isExecution())
+        this.executionOOG = true;
+    },
+  } 
+"#;
+
+#[cfg(test)]
+mod test {
+    use serde::{Deserialize, Serialize};
+    use serde_json::Value;
+
+    // Json Test for the `ExecutorTracerResult` struct
+    #[test]
+    fn test_json() {
+        #[derive(Serialize, Deserialize, Debug)]
+        struct A {
+            data: Vec<u8>,
+        }
+        let data = r#"
+        {
+            "data": [0,0,195,0,0]
+        }"#;
+        let v: Value = serde_json::from_str(data).unwrap();
+        println!("{:?}", v);
+        let a: A = serde_json::from_value(v).unwrap();
+        println!("{:?}", a);
+    }
+}

crates/contracts/src/lib.rs

@@ -2,9 +2,13 @@
 
 pub mod entry_point;
 mod error;
+pub mod executor_tracer;
 mod gen;
 pub mod tracer;
 pub mod utils;
 
 pub use entry_point::EntryPoint;
-pub use error::EntryPointError;
+pub use error::{decode_revert_string, EntryPointError};
+pub use gen::{
+    ExecutionResult, FailedOp, UserOperationEventFilter, UserOperationRevertReasonFilter,
+};

crates/mempool/Cargo.toml

@@ -35,6 +35,7 @@ tokio = { workspace = true }
 
 # misc
 bin-layout = "7.1.0"
+const-hex = "1.10.0"
 enumset = "1.1.3"
 eyre = { workspace = true }
 page_size = "0.6.0"