diff --git a/Cargo.lock b/Cargo.lock
index bdae392a39f6..f746eaca26a8 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5325,6 +5325,35 @@ version = "11.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0ab1bc2a289d34bd04a330323ac98a1b4bc82c9d9fcb1e66b63caa84da26b575"
 
+[[package]]
+name = "op-alloy-consensus"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "767fd3026c514f4d2ebdb4ebda5ed8857660dd1ef5bfed2aaa2ae8e42019630e"
+dependencies = [
+ "alloy-consensus",
+ "alloy-eips",
+ "alloy-primitives",
+ "alloy-rlp",
+ "alloy-serde",
+ "serde",
+]
+
+[[package]]
+name = "op-alloy-rpc-types"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c50d6e6767b0b21efc9efb40fc0802ad6d28321c66ff17f1aaa46003cd234d4d"
+dependencies = [
+ "alloy-network",
+ "alloy-primitives",
+ "alloy-rpc-types-eth",
+ "alloy-serde",
+ "op-alloy-consensus",
+ "serde",
+ "serde_json",
+]
+
 [[package]]
 name = "opaque-debug"
 version = "0.3.1"
@@ -6556,6 +6585,7 @@ dependencies = [
  "derive_more",
  "nybbles",
  "once_cell",
+ "op-alloy-rpc-types",
  "rand 0.8.5",
  "reth-ethereum-forks",
  "reth-network-peers",
diff --git a/Cargo.toml b/Cargo.toml
index ceb9c9532083..537f7f3cf1a3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -419,6 +419,9 @@ alloy-pubsub = { version = "0.1", default-features = false }
 alloy-json-rpc = { version = "0.1", default-features = false }
 alloy-rpc-client = { version = "0.1", default-features = false }
 
+# op
+op-alloy-rpc-types = "0.1"
+
 # misc
 auto_impl = "1"
 aquamarine = "0.5"
diff --git a/crates/chainspec/Cargo.toml b/crates/chainspec/Cargo.toml
index f473acc4b20a..e4574acdace9 100644
--- a/crates/chainspec/Cargo.toml
+++ b/crates/chainspec/Cargo.toml
@@ -24,6 +24,10 @@ alloy-genesis.workspace = true
 alloy-primitives = { workspace = true, features = ["rand", "rlp"] }
 alloy-trie.workspace = true
 
+# op
+op-alloy-rpc-types = { workspace = true, optional = true }
+
+
 # misc
 once_cell.workspace = true
 serde = { workspace = true, optional = true }
@@ -40,11 +44,15 @@ alloy-genesis.workspace = true
 reth-rpc-types.workspace = true
 rand.workspace = true
 
+# op
+op-alloy-rpc-types.workspace = true
+
 [features]
 default = ["std"]
 optimism = [
     "reth-ethereum-forks/optimism",
-    "serde"
+    "serde",
+    "dep:op-alloy-rpc-types",
 ]
 std = []
 arbitrary = [
diff --git a/crates/chainspec/src/spec.rs b/crates/chainspec/src/spec.rs
index 33ca2f4f0244..4b1083f60aab 100644
--- a/crates/chainspec/src/spec.rs
+++ b/crates/chainspec/src/spec.rs
@@ -731,6 +731,9 @@ impl From<Genesis> for ChainSpec {
     fn from(genesis: Genesis) -> Self {
         #[cfg(feature = "optimism")]
         let optimism_genesis_info = OptimismGenesisInfo::extract_from(&genesis);
+        #[cfg(feature = "optimism")]
+        let genesis_info =
+            optimism_genesis_info.optimism_chain_info.genesis_info.unwrap_or_default();
 
         // Block-based hardforks
         let hardfork_opts = [
@@ -748,7 +751,7 @@ impl From<Genesis> for ChainSpec {
             (EthereumHardfork::ArrowGlacier.boxed(), genesis.config.arrow_glacier_block),
             (EthereumHardfork::GrayGlacier.boxed(), genesis.config.gray_glacier_block),
             #[cfg(feature = "optimism")]
-            (OptimismHardfork::Bedrock.boxed(), optimism_genesis_info.bedrock_block),
+            (OptimismHardfork::Bedrock.boxed(), genesis_info.bedrock_block),
         ];
         let mut hardforks = hardfork_opts
             .into_iter()
@@ -777,13 +780,13 @@ impl From<Genesis> for ChainSpec {
             (EthereumHardfork::Cancun.boxed(), genesis.config.cancun_time),
             (EthereumHardfork::Prague.boxed(), genesis.config.prague_time),
             #[cfg(feature = "optimism")]
-            (OptimismHardfork::Regolith.boxed(), optimism_genesis_info.regolith_time),
+            (OptimismHardfork::Regolith.boxed(), genesis_info.regolith_time),
             #[cfg(feature = "optimism")]
-            (OptimismHardfork::Canyon.boxed(), optimism_genesis_info.canyon_time),
+            (OptimismHardfork::Canyon.boxed(), genesis_info.canyon_time),
             #[cfg(feature = "optimism")]
-            (OptimismHardfork::Ecotone.boxed(), optimism_genesis_info.ecotone_time),
+            (OptimismHardfork::Ecotone.boxed(), genesis_info.ecotone_time),
             #[cfg(feature = "optimism")]
-            (OptimismHardfork::Fjord.boxed(), optimism_genesis_info.fjord_time),
+            (OptimismHardfork::Fjord.boxed(), genesis_info.fjord_time),
         ];
 
         let time_hardforks = time_hardfork_opts
@@ -1085,33 +1088,22 @@ impl DepositContract {
 #[derive(Default, Debug, serde::Deserialize)]
 #[serde(rename_all = "camelCase")]
 struct OptimismGenesisInfo {
-    bedrock_block: Option<u64>,
-    regolith_time: Option<u64>,
-    canyon_time: Option<u64>,
-    ecotone_time: Option<u64>,
-    fjord_time: Option<u64>,
+    optimism_chain_info: op_alloy_rpc_types::genesis::OptimismChainInfo,
     #[serde(skip)]
     base_fee_params: BaseFeeParamsKind,
 }
 
-#[cfg(feature = "optimism")]
-#[derive(Debug, Eq, PartialEq, serde::Deserialize)]
-#[serde(rename_all = "camelCase")]
-struct OptimismBaseFeeInfo {
-    eip1559_elasticity: Option<u64>,
-    eip1559_denominator: Option<u64>,
-    eip1559_denominator_canyon: Option<u64>,
-}
-
 #[cfg(feature = "optimism")]
 impl OptimismGenesisInfo {
     fn extract_from(genesis: &Genesis) -> Self {
-        let mut optimism_genesis_info: Self =
-            genesis.config.extra_fields.deserialize_as().unwrap_or_default();
-
-        if let Some(Ok(optimism_base_fee_info)) =
-            genesis.config.extra_fields.get_deserialized::<OptimismBaseFeeInfo>("optimism")
-        {
+        let mut info = Self {
+            optimism_chain_info: op_alloy_rpc_types::genesis::OptimismChainInfo::extract_from(
+                &genesis.config.extra_fields,
+            )
+            .unwrap_or_default(),
+            ..Default::default()
+        };
+        if let Some(optimism_base_fee_info) = &info.optimism_chain_info.base_fee_info {
             if let (Some(elasticity), Some(denominator)) = (
                 optimism_base_fee_info.eip1559_elasticity,
                 optimism_base_fee_info.eip1559_denominator,
@@ -1136,11 +1128,11 @@ impl OptimismGenesisInfo {
                     BaseFeeParams::new(denominator as u128, elasticity as u128).into()
                 };
 
-                optimism_genesis_info.base_fee_params = base_fee_params;
+                info.base_fee_params = base_fee_params;
             }
         }
 
-        optimism_genesis_info
+        info
     }
 }
 
@@ -2902,6 +2894,8 @@ Post-merge hard forks (timestamp based):
     #[cfg(feature = "optimism")]
     #[test]
     fn parse_genesis_optimism_with_variable_base_fee_params() {
+        use op_alloy_rpc_types::genesis::OptimismBaseFeeInfo;
+
         let geth_genesis = r#"
     {
       "config": {