feat(gpo): add default fee price argument

crates/node/core/src/args/gas_price_oracle.rs

@@ -25,17 +25,22 @@ pub struct GasPriceOracleArgs {
     /// The percentile of gas prices to use for the estimate
     #[arg(long = "gpo.percentile", default_value_t = DEFAULT_GAS_PRICE_PERCENTILE)]
     pub percentile: u32,
+
+    /// The default gas price to use if there are no blocks to use
+    #[arg(long = "gpo.default-suggested-fee")]
+    pub default_suggested_fee: Option<U256>,
 }
 
 impl GasPriceOracleArgs {
     /// Returns a [`GasPriceOracleConfig`] from the arguments.
     pub fn gas_price_oracle_config(&self) -> GasPriceOracleConfig {
-        let Self { blocks, ignore_price, max_price, percentile } = self;
+        let Self { blocks, ignore_price, max_price, percentile, default_suggested_fee } = self;
         GasPriceOracleConfig {
             max_price: Some(U256::from(*max_price)),
             ignore_price: Some(U256::from(*ignore_price)),
             percentile: *percentile,
             blocks: *blocks,
+            default_suggested_fee: *default_suggested_fee,
             ..Default::default()
         }
     }
@@ -48,6 +53,7 @@ impl Default for GasPriceOracleArgs {
             ignore_price: DEFAULT_IGNORE_GAS_PRICE.to(),
             max_price: DEFAULT_MAX_GAS_PRICE.to(),
             percentile: DEFAULT_GAS_PRICE_PERCENTILE,
+            default_suggested_fee: None,
         }
     }
 }
@@ -73,6 +79,7 @@ mod tests {
                 ignore_price: DEFAULT_IGNORE_GAS_PRICE.to(),
                 max_price: DEFAULT_MAX_GAS_PRICE.to(),
                 percentile: DEFAULT_GAS_PRICE_PERCENTILE,
+                default_suggested_fee: None,
             }
         );
     }

crates/rpc/rpc-eth-types/src/gas_oracle.rs

@@ -49,7 +49,7 @@ pub struct GasPriceOracleConfig {
     pub max_reward_percentile_count: u64,
 
     /// The default gas price to use if there are no blocks to use
-    pub default: Option<U256>,
+    pub default_suggested_fee: Option<U256>,
 
     /// The maximum gas price to use for the estimate
     pub max_price: Option<U256>,
@@ -66,7 +66,7 @@ impl Default for GasPriceOracleConfig {
             max_header_history: MAX_HEADER_HISTORY,
             max_block_history: MAX_HEADER_HISTORY,
             max_reward_percentile_count: MAX_REWARD_PERCENTILE_COUNT,
-            default: None,
+            default_suggested_fee: None,
             max_price: Some(DEFAULT_MAX_GAS_PRICE),
             ignore_price: Some(DEFAULT_IGNORE_GAS_PRICE),
         }
@@ -112,7 +112,12 @@ where
         // this is the number of blocks that we will cache the values for
         let cached_values = (oracle_config.blocks * 5).max(oracle_config.max_block_history as u32);
         let inner = Mutex::new(GasPriceOracleInner {
-            last_price: Default::default(),
+            last_price: GasPriceOracleResult {
+                block_hash: B256::ZERO,
+                price: oracle_config
+                    .default_suggested_fee
+                    .unwrap_or_else(|| GasPriceOracleResult::default().price),
+            },
             lowest_effective_tip_cache: EffectiveTipLruCache(LruMap::new(ByLength::new(
                 cached_values,
             ))),

docs/vocs/docs/pages/cli/reth/node.mdx

@@ -462,6 +462,9 @@ Gas Price Oracle:
 
           [default: 60]
 
+      --gpo.default-suggested-fee <DEFAULT_SUGGESTED_FEE>
+          The default gas price to use if there are no blocks to use
+
 TxPool:
       --txpool.pending-max-count <PENDING_MAX_COUNT>
           Max number of transaction in the pending sub-pool