chore: PR comments & nits

bin/reth/src/node/mod.rs

@@ -831,8 +831,9 @@ impl<Ext: RethCliExt> NodeCommand<Ext> {
                 self.network.port + self.instance - 1,
             )));
 
-        // Expose an http sequencer endpoint if configured and disables tx gossip.
-        // This prevents tx gossip from leaking into the network.
+        // When `sequencer_endpoint` is configured, the node will forward all transactions to a
+        // Sequencer node for execution and inclusion on L1, and disable its own txpool
+        // gossip to prevent other parties in the network from learning about them.
         #[cfg(feature = "optimism")]
         let cfg_builder = cfg_builder
             .sequencer_endpoint(self.rollup.sequencer_http.clone())

crates/primitives/src/chain/spec.rs

@@ -242,37 +242,6 @@ pub static DEV: Lazy<Arc<ChainSpec>> = Lazy::new(|| {
     .into()
 });
 
-/// BaseFeeParams contains the config parameters that control block base fee computation
-#[derive(Serialize, Deserialize, Debug, Copy, Clone, PartialEq, Eq)]
-pub struct BaseFeeParams {
-    /// The base_fee_max_change_denominator from EIP-1559
-    pub max_change_denominator: u64,
-    /// The elasticity multiplier from EIP-1559
-    pub elasticity_multiplier: u64,
-}
-
-impl BaseFeeParams {
-    /// Get the base fee parameters for Ethereum mainnet
-    pub const fn ethereum() -> BaseFeeParams {
-        BaseFeeParams {
-            max_change_denominator: EIP1559_DEFAULT_BASE_FEE_MAX_CHANGE_DENOMINATOR,
-            elasticity_multiplier: EIP1559_DEFAULT_ELASTICITY_MULTIPLIER,
-        }
-    }
-
-    /// Get the base fee parameters for optimism goerli
-    #[cfg(feature = "optimism")]
-    pub const fn optimism_goerli() -> BaseFeeParams {
-        BaseFeeParams { max_change_denominator: 50, elasticity_multiplier: 10 }
-    }
-
-    /// Get the base fee parameters for optimism mainnet
-    #[cfg(feature = "optimism")]
-    pub const fn optimism() -> BaseFeeParams {
-        BaseFeeParams { max_change_denominator: 50, elasticity_multiplier: 6 }
-    }
-}
-
 /// The Optimism Goerli spec
 #[cfg(feature = "optimism")]
 pub static OP_GOERLI: Lazy<Arc<ChainSpec>> = Lazy::new(|| {
@@ -396,6 +365,47 @@ pub static BASE_MAINNET: Lazy<Arc<ChainSpec>> = Lazy::new(|| {
     .into()
 });
 
+/// BaseFeeParams contains the config parameters that control block base fee computation
+#[derive(Serialize, Deserialize, Debug, Copy, Clone, PartialEq, Eq)]
+pub struct BaseFeeParams {
+    /// The base_fee_max_change_denominator from EIP-1559
+    pub max_change_denominator: u64,
+    /// The elasticity multiplier from EIP-1559
+    pub elasticity_multiplier: u64,
+}
+
+impl BaseFeeParams {
+    /// Get the base fee parameters for Ethereum mainnet
+    pub const fn ethereum() -> BaseFeeParams {
+        BaseFeeParams {
+            max_change_denominator: EIP1559_DEFAULT_BASE_FEE_MAX_CHANGE_DENOMINATOR,
+            elasticity_multiplier: EIP1559_DEFAULT_ELASTICITY_MULTIPLIER,
+        }
+    }
+
+    /// Get the base fee parameters for optimism goerli
+    #[cfg(feature = "optimism")]
+    pub const fn optimism_goerli() -> BaseFeeParams {
+        BaseFeeParams {
+            max_change_denominator:
+                crate::constants::OP_GOERLI_EIP1559_DEFAULT_BASE_FEE_MAX_CHANGE_DENOMINATOR,
+            elasticity_multiplier:
+                crate::constants::OP_GOERLI_EIP1559_DEFAULT_ELASTICITY_MULTIPLIER,
+        }
+    }
+
+    /// Get the base fee parameters for optimism mainnet
+    #[cfg(feature = "optimism")]
+    pub const fn optimism() -> BaseFeeParams {
+        BaseFeeParams {
+            max_change_denominator:
+                crate::constants::OP_MAINNET_EIP1559_DEFAULT_BASE_FEE_MAX_CHANGE_DENOMINATOR,
+            elasticity_multiplier:
+                crate::constants::OP_MAINNET_EIP1559_DEFAULT_ELASTICITY_MULTIPLIER,
+        }
+    }
+}
+
 /// An Ethereum chain specification.
 ///
 /// A chain specification describes:

crates/primitives/src/constants/mod.rs

@@ -60,6 +60,26 @@ pub const EIP1559_DEFAULT_BASE_FEE_MAX_CHANGE_DENOMINATOR: u64 = 8;
 /// Elasticity multiplier as defined in [EIP-1559](https://eips.ethereum.org/EIPS/eip-1559)
 pub const EIP1559_DEFAULT_ELASTICITY_MULTIPLIER: u64 = 2;
 
+/// Base fee max change denominator for Optimism Mainnet as defined in the Optimism
+/// [transaction costs](https://community.optimism.io/docs/developers/build/differences/#transaction-costs) doc.
+#[cfg(feature = "optimism")]
+pub const OP_MAINNET_EIP1559_DEFAULT_BASE_FEE_MAX_CHANGE_DENOMINATOR: u64 = 50;
+
+/// Base fee max change denominator for Optimism Mainnet as defined in the Optimism
+/// [transaction costs](https://community.optimism.io/docs/developers/build/differences/#transaction-costs) doc.
+#[cfg(feature = "optimism")]
+pub const OP_MAINNET_EIP1559_DEFAULT_ELASTICITY_MULTIPLIER: u64 = 6;
+
+/// Base fee max change denominator for Optimism Goerli as defined in the Optimism
+/// [transaction costs](https://community.optimism.io/docs/developers/build/differences/#transaction-costs) doc.
+#[cfg(feature = "optimism")]
+pub const OP_GOERLI_EIP1559_DEFAULT_BASE_FEE_MAX_CHANGE_DENOMINATOR: u64 = 50;
+
+/// Base fee max change denominator for Optimism Goerli as defined in the Optimism
+/// [transaction costs](https://community.optimism.io/docs/developers/build/differences/#transaction-costs) doc.
+#[cfg(feature = "optimism")]
+pub const OP_GOERLI_EIP1559_DEFAULT_ELASTICITY_MULTIPLIER: u64 = 10;
+
 /// Multiplier for converting gwei to wei.
 pub const GWEI_TO_WEI: u64 = 1_000_000_000;
 

crates/primitives/src/transaction/mod.rs

@@ -396,12 +396,12 @@ impl Transaction {
     }
 
     /// Returns the source hash of the transaction, which uniquely identifies its source.
-    /// If the transaction is not a deposit transaction, this will always return `B256::zero()`.
+    /// If not a deposit transaction, this will always return `None`.
     #[cfg(feature = "optimism")]
-    pub fn source_hash(&self) -> B256 {
+    pub fn source_hash(&self) -> Option<B256> {
         match self {
-            Transaction::Deposit(TxDeposit { source_hash, .. }) => *source_hash,
-            _ => B256::ZERO,
+            Transaction::Deposit(TxDeposit { source_hash, .. }) => Some(*source_hash),
+            _ => None,
         }
     }
 
@@ -616,8 +616,8 @@ impl Compact for Transaction {
                 tx.to_compact(buf);
             }
             #[cfg(feature = "optimism")]
-            Transaction::Deposit(deposit) => {
-                deposit.to_compact(buf);
+            Transaction::Deposit(tx) => {
+                tx.to_compact(buf);
             }
         }
         identifier

crates/rpc/rpc-types-compat/src/transaction/mod.rs

@@ -139,7 +139,7 @@ fn fill(
         // Optimism fields
         #[cfg(feature = "optimism")]
         optimism: reth_rpc_types::OptimismTransactionFields {
-            source_hash: signed_tx.is_deposit().then_some(signed_tx.source_hash()),
+            source_hash: signed_tx.source_hash(),
             mint: signed_tx.mint().map(U128::from),
             is_system_tx: signed_tx.is_deposit().then_some(signed_tx.is_system_transaction()),
         },