From ee1df5231a121b82abcdfcbff87d6bbf25b73036 Mon Sep 17 00:00:00 2001
From: Aditya Bisht <adityabisht64@gmail.com>
Date: Wed, 29 Jan 2025 10:58:29 +0000
Subject: [PATCH 1/2] fix: op dev chain transaction

---
 Cargo.lock                                 |  2 ++
 crates/engine/local/Cargo.toml             |  3 +++
 crates/engine/local/src/payload.rs         |  6 +++++-
 crates/optimism/chainspec/src/constants.rs | 10 ++++++++++
 4 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/Cargo.lock b/Cargo.lock
index 09ac2d8a56da..6966651478c3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -7089,6 +7089,7 @@ dependencies = [
 name = "reth-engine-local"
 version = "1.1.5"
 dependencies = [
+ "alloy-chains",
  "alloy-consensus",
  "alloy-primitives",
  "alloy-rpc-types-engine",
@@ -7103,6 +7104,7 @@ dependencies = [
  "reth-ethereum-engine-primitives",
  "reth-evm",
  "reth-node-types",
+ "reth-optimism-chainspec",
  "reth-payload-builder",
  "reth-payload-builder-primitives",
  "reth-payload-primitives",
diff --git a/crates/engine/local/Cargo.toml b/crates/engine/local/Cargo.toml
index d80be90e0cdc..02a7b138c75a 100644
--- a/crates/engine/local/Cargo.toml
+++ b/crates/engine/local/Cargo.toml
@@ -27,6 +27,7 @@ reth-transaction-pool.workspace = true
 reth-stages-api.workspace = true
 
 # alloy
+alloy-chains.workspace = true
 alloy-consensus.workspace = true
 alloy-primitives.workspace = true
 alloy-rpc-types-engine.workspace = true
@@ -41,6 +42,7 @@ eyre.workspace = true
 tracing.workspace = true
 
 op-alloy-rpc-types-engine = { workspace = true, optional = true }
+reth-optimism-chainspec = { workspace = true, optional = true }
 
 [lints]
 workspace = true
@@ -48,4 +50,5 @@ workspace = true
 [features]
 op = [
     "dep:op-alloy-rpc-types-engine",
+    "dep:reth-optimism-chainspec",
 ]
diff --git a/crates/engine/local/src/payload.rs b/crates/engine/local/src/payload.rs
index 088a42fbf96b..ea6c63083a94 100644
--- a/crates/engine/local/src/payload.rs
+++ b/crates/engine/local/src/payload.rs
@@ -52,7 +52,11 @@ where
     fn build(&self, timestamp: u64) -> op_alloy_rpc_types_engine::OpPayloadAttributes {
         op_alloy_rpc_types_engine::OpPayloadAttributes {
             payload_attributes: self.build(timestamp),
-            transactions: None,
+            // Add dummy system transaction
+            transactions: Some(vec![
+                reth_optimism_chainspec::constants::TX_SET_L1_BLOCK_OP_MAINNET_BLOCK_124665056
+                    .into(),
+            ]),
             no_tx_pool: None,
             gas_limit: None,
             eip_1559_params: None,
diff --git a/crates/optimism/chainspec/src/constants.rs b/crates/optimism/chainspec/src/constants.rs
index 439c2fed83c0..1ce31658b9e5 100644
--- a/crates/optimism/chainspec/src/constants.rs
+++ b/crates/optimism/chainspec/src/constants.rs
@@ -1,5 +1,7 @@
 //! OP stack variation of chain spec constants.
 
+use alloy_primitives::hex;
+
 //------------------------------- BASE MAINNET -------------------------------//
 
 /// Max gas limit on Base: <https://basescan.org/block/17208876>
@@ -9,3 +11,11 @@ pub const BASE_MAINNET_MAX_GAS_LIMIT: u64 = 105_000_000;
 
 /// Max gas limit on Base Sepolia: <https://sepolia.basescan.org/block/12506483>
 pub const BASE_SEPOLIA_MAX_GAS_LIMIT: u64 = 45_000_000;
+
+//----------------------------------- DEV ------------------------------------//
+
+/// Dummy system transaction for dev mode
+/// OP Mainnet transaction at index 0 in block 124665056.
+///
+/// <https://optimistic.etherscan.io/tx/0x312e290cf36df704a2217b015d6455396830b0ce678b860ebfcc30f41403d7b1>
+pub const TX_SET_L1_BLOCK_OP_MAINNET_BLOCK_124665056: [u8; 251] = hex!("7ef8f8a0683079df94aa5b9cf86687d739a60a9b4f0835e520ec4d664e2e415dca17a6df94deaddeaddeaddeaddeaddeaddeaddeaddead00019442000000000000000000000000000000000000158080830f424080b8a4440a5e200000146b000f79c500000000000000040000000066d052e700000000013ad8a3000000000000000000000000000000000000000000000000000000003ef1278700000000000000000000000000000000000000000000000000000000000000012fdf87b89884a61e74b322bbcf60386f543bfae7827725efaaf0ab1de2294a590000000000000000000000006887246668a3b87f54deb3b94ba47a6f63f32985");

From 9448211338f611cf83ef80732ae6095f2bf60dbb Mon Sep 17 00:00:00 2001
From: Matthias Seitz <matthias.seitz@outlook.de>
Date: Thu, 30 Jan 2025 13:45:53 +0100
Subject: [PATCH 2/2] clippy

---
 Cargo.lock                     | 1 -
 crates/engine/local/Cargo.toml | 1 -
 2 files changed, 2 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 70ec8cd40595..43251446d7b5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -7088,7 +7088,6 @@ dependencies = [
 name = "reth-engine-local"
 version = "1.1.5"
 dependencies = [
- "alloy-chains",
  "alloy-consensus",
  "alloy-primitives",
  "alloy-rpc-types-engine",
diff --git a/crates/engine/local/Cargo.toml b/crates/engine/local/Cargo.toml
index 02a7b138c75a..0e4e546eb929 100644
--- a/crates/engine/local/Cargo.toml
+++ b/crates/engine/local/Cargo.toml
@@ -27,7 +27,6 @@ reth-transaction-pool.workspace = true
 reth-stages-api.workspace = true
 
 # alloy
-alloy-chains.workspace = true
 alloy-consensus.workspace = true
 alloy-primitives.workspace = true
 alloy-rpc-types-engine.workspace = true