feat: display warning for op-mainnet launch without pre-Bedrock state

crates/optimism/chainspec/Cargo.toml

@@ -35,6 +35,7 @@ serde_json.workspace = true
 # misc
 derive_more.workspace = true
 once_cell.workspace = true
+tracing.workspace = true
 
 [dev-dependencies]
 reth-chainspec = { workspace = true, features = ["test-utils"] }

crates/optimism/chainspec/src/lib.rs

@@ -40,6 +40,7 @@ use reth_optimism_forks::OptimismHardforks;
 use reth_primitives_traits::Header;
 #[cfg(feature = "std")]
 pub(crate) use std::sync::LazyLock;
+use tracing::warn;
 
 /// Chain spec builder for a OP stack chain.
 #[derive(Debug, Default, From)]
@@ -67,6 +68,16 @@ impl OpChainSpecBuilder {
         let forks = OP_MAINNET.hardforks.clone();
         inner = inner.with_forks(forks);
 
+        let is_bedrock_active = OP_MAINNET.is_bedrock_active_at_block(105235063);
+
+        if !is_bedrock_active {
+            warn!(
+                "Warning: Op-mainnet has been launched without importing the pre-Bedrock state. \
+                The chain will not progress without this import. \
+                Please ensure that the pre-Bedrock state is imported to avoid synchronization issues and ensure proper chain operation."
+            );
+        }
+
         Self { inner }
     }
 }