feat: add activation_block method for Ethereum hardforks (#5723)

Co-authored-by: Matthias Seitz <[email protected]>

crates/ethereum-forks/Cargo.toml

@@ -16,6 +16,7 @@ workspace = true
 reth-codecs.workspace = true
 
 # ethereum
+alloy-chains.workspace = true
 alloy-primitives = { workspace = true, features = ["rand", "rlp"] }
 alloy-rlp = { workspace = true, features = ["arrayvec"] }
 

crates/ethereum-forks/src/hardfork.rs

@@ -1,5 +1,5 @@
+use alloy_chains::Chain;
 use serde::{Deserialize, Serialize};
-
 use std::{fmt::Display, str::FromStr};
 
 /// The name of an Ethereum hardfork.
@@ -51,6 +51,44 @@ pub enum Hardfork {
     Cancun,
 }
 
+impl Hardfork {
+    /// Retrieves the activation block for the specified hardfork on the Ethereum mainnet.
+    pub fn mainnet_activation_block(&self, chain: Chain) -> Option<u64> {
+        if chain != Chain::mainnet() {
+            return None;
+        }
+        match self {
+            Hardfork::Frontier => Some(0),
+            Hardfork::Homestead => Some(1150000),
+            Hardfork::Dao => Some(1920000),
+            Hardfork::Tangerine => Some(2463000),
+            Hardfork::SpuriousDragon => Some(2675000),
+            Hardfork::Byzantium => Some(4370000),
+            Hardfork::Constantinople => Some(7280000),
+            Hardfork::Petersburg => Some(7280000),
+            Hardfork::Istanbul => Some(9069000),
+            Hardfork::MuirGlacier => Some(9200000),
+            Hardfork::Berlin => Some(12244000),
+            Hardfork::London => Some(12965000),
+            Hardfork::ArrowGlacier => Some(13773000),
+            Hardfork::GrayGlacier => Some(15050000),
+            Hardfork::Paris => Some(15537394),
+            Hardfork::Shanghai => Some(17034870),
+
+            // upcoming hardforks
+            Hardfork::Cancun => None,
+
+            // optimism hardforks
+            #[cfg(feature = "optimism")]
+            Hardfork::Bedrock => None,
+            #[cfg(feature = "optimism")]
+            Hardfork::Regolith => None,
+            #[cfg(feature = "optimism")]
+            Hardfork::Canyon => None,
+        }
+    }
+}
+
 impl FromStr for Hardfork {
     type Err = String;