diff --git a/crates/handler/src/handler.rs b/crates/handler/src/handler.rs
index 32078dd961..2779d77138 100644
--- a/crates/handler/src/handler.rs
+++ b/crates/handler/src/handler.rs
@@ -32,9 +32,26 @@ impl<
 {
 }
 
+/// Main logic of Ethereum Mainnet execution.
+///
+/// The starting point for execution is the `run` method. And without overriding
+/// any methods allows you to execute Ethereum mainnet transactions.
+///
+/// If there is a need to change parts of execution logic this can be done by changing default
+/// method implementation.
+///
+/// Handler logic is split in four parts:
+///   * Verification - loads caller account checks initial gas requirement.
+///   * Pre execution - loads and warms rest of accounts and deducts initial gas.
+///   * Execution - Executed the main frame loop. It calls [`Frame`] for sub call logic.
+///   * Post execution - Calculates the final refund, checks gas floor, reimburses caller and
+///     rewards beneficiary.
 pub trait Handler {
+    /// The EVM type that contains Context, Instruction, Precompiles.
     type Evm: EvmTr<Context: ContextTr<Journal: JournalTr<FinalOutput = JournalOutput>>>;
+    /// Error that is going to be returned.
     type Error: EvmTrError<Self::Evm>;
+    /// Frame type contains data for frame execution. EthFrame currently supports Call, Create and EofCreate frames.
     // TODO `FrameResult` should be a generic trait.
     // TODO `FrameInit` should be a generic.
     type Frame: Frame<
@@ -43,7 +60,8 @@ pub trait Handler {
         FrameResult = FrameResult,
         FrameInit = FrameInput,
     >;
-    // TODO `HaltReason` should be part of the output.
+    /// Halt reason type is part of the output
+    ///  TODO `HaltReason` should be part of the output.
     type HaltReason: HaltReasonTr;
 
     #[inline]
diff --git a/crates/optimism/src/api/exec.rs b/crates/optimism/src/api/exec.rs
index f82c4a0017..ecbf58d5af 100644
--- a/crates/optimism/src/api/exec.rs
+++ b/crates/optimism/src/api/exec.rs
@@ -9,7 +9,7 @@ use revm::{
         Cfg, ContextTr, Database, JournalTr,
     },
     handler::{instructions::EthInstructions, EthFrame, EvmTr, Handler, PrecompileProvider},
-    inspector::{InspectCommitEvm, InspectEvm, Inspector, JournalExt},
+    inspector::{InspectCommitEvm, InspectEvm, Inspector, InspectorHandler, JournalExt},
     interpreter::{interpreter::EthInterpreter, InterpreterResult},
     DatabaseCommit, ExecuteCommitEvm, ExecuteEvm,
 };
@@ -83,7 +83,7 @@ where
 
     fn inspect_previous(&mut self) -> Self::Output {
         let mut h = OpHandler::<_, _, EthFrame<_, _, _>>::new();
-        h.run(self)
+        h.inspect_run(self)
     }
 }
 
diff --git a/crates/optimism/src/evm.rs b/crates/optimism/src/evm.rs
index 6aecd23f22..81c2da424a 100644
--- a/crates/optimism/src/evm.rs
+++ b/crates/optimism/src/evm.rs
@@ -6,9 +6,11 @@ use revm::{
         instructions::{EthInstructions, InstructionProvider},
         EvmTr,
     },
+    inspector::{InspectorEvmTr, JournalExt},
     interpreter::{
         interpreter::EthInterpreter, Host, Interpreter, InterpreterAction, InterpreterTypes,
     },
+    Inspector,
 };
 
 pub struct OpEvm<CTX, INSP, I = EthInstructions<EthInterpreter, CTX>, P = OpPrecompiles>(
@@ -25,6 +27,36 @@ impl<CTX: Host, INSP> OpEvm<CTX, INSP, EthInstructions<EthInterpreter, CTX>, OpP
     }
 }
 
+impl<CTX: ContextSetters, INSP, I, P> InspectorEvmTr for OpEvm<CTX, INSP, I, P>
+where
+    CTX: ContextTr<Journal: JournalExt>,
+    I: InstructionProvider<
+        Context = CTX,
+        InterpreterTypes: InterpreterTypes<Output = InterpreterAction>,
+    >,
+    INSP: Inspector<CTX, I::InterpreterTypes>,
+{
+    type Inspector = INSP;
+
+    fn inspector(&mut self) -> &mut Self::Inspector {
+        &mut self.0.data.inspector
+    }
+
+    fn ctx_inspector(&mut self) -> (&mut Self::Context, &mut Self::Inspector) {
+        (&mut self.0.data.ctx, &mut self.0.data.inspector)
+    }
+
+    fn run_inspect_interpreter(
+        &mut self,
+        interpreter: &mut Interpreter<
+            <Self::Instructions as InstructionProvider>::InterpreterTypes,
+        >,
+    ) -> <<Self::Instructions as InstructionProvider>::InterpreterTypes as InterpreterTypes>::Output
+    {
+        self.0.run_inspect_interpreter(interpreter)
+    }
+}
+
 impl<CTX: ContextSetters, INSP, I, P> ContextSetters for OpEvm<CTX, INSP, I, P> {
     type Tx = <CTX as ContextSetters>::Tx;
     type Block = <CTX as ContextSetters>::Block;