feat: add some ethapi builder fns

crates/rpc/rpc/src/eth/builder.rs

@@ -61,6 +61,14 @@ where
 }
 
 impl<N: RpcNodeCore, Rpc, NextEnv> EthApiBuilder<N, Rpc, NextEnv> {
+    /// Apply a function to the builder
+    pub fn apply<F>(self, f: F) -> Self
+    where
+        F: FnOnce(Self) -> Self,
+    {
+        f(self)
+    }
+
     /// Converts the RPC converter type of this builder
     pub fn map_converter<F, R>(self, f: F) -> EthApiBuilder<N, R, NextEnv>
     where
@@ -323,6 +331,112 @@ where
         self
     }
 
+    /// Returns the gas cap.
+    pub const fn get_gas_cap(&self) -> &GasCap {
+        &self.gas_cap
+    }
+
+    /// Returns the maximum simulate blocks.
+    pub const fn get_max_simulate_blocks(&self) -> u64 {
+        self.max_simulate_blocks
+    }
+
+    /// Returns the ETH proof window.
+    pub const fn get_eth_proof_window(&self) -> u64 {
+        self.eth_proof_window
+    }
+
+    /// Returns a reference to the fee history cache config.
+    pub const fn get_fee_history_cache_config(&self) -> &FeeHistoryCacheConfig {
+        &self.fee_history_cache_config
+    }
+
+    /// Returns the proof permits.
+    pub const fn get_proof_permits(&self) -> usize {
+        self.proof_permits
+    }
+
+    /// Returns a reference to the ETH state cache config.
+    pub const fn get_eth_state_cache_config(&self) -> &EthStateCacheConfig {
+        &self.eth_state_cache_config
+    }
+
+    /// Returns a reference to the gas oracle config.
+    pub const fn get_gas_oracle_config(&self) -> &GasPriceOracleConfig {
+        &self.gas_oracle_config
+    }
+
+    /// Returns the max batch size.
+    pub const fn get_max_batch_size(&self) -> usize {
+        self.max_batch_size
+    }
+
+    /// Returns the pending block kind.
+    pub const fn get_pending_block_kind(&self) -> PendingBlockKind {
+        self.pending_block_kind
+    }
+
+    /// Returns a reference to the raw tx forwarder config.
+    pub const fn get_raw_tx_forwarder(&self) -> &ForwardConfig {
+        &self.raw_tx_forwarder
+    }
+
+    /// Returns a mutable reference to the fee history cache config.
+    pub const fn fee_history_cache_config_mut(&mut self) -> &mut FeeHistoryCacheConfig {
+        &mut self.fee_history_cache_config
+    }
+
+    /// Returns a mutable reference to the ETH state cache config.
+    pub const fn eth_state_cache_config_mut(&mut self) -> &mut EthStateCacheConfig {
+        &mut self.eth_state_cache_config
+    }
+
+    /// Returns a mutable reference to the gas oracle config.
+    pub const fn gas_oracle_config_mut(&mut self) -> &mut GasPriceOracleConfig {
+        &mut self.gas_oracle_config
+    }
+
+    /// Returns a mutable reference to the raw tx forwarder config.
+    pub const fn raw_tx_forwarder_mut(&mut self) -> &mut ForwardConfig {
+        &mut self.raw_tx_forwarder
+    }
+
+    /// Modifies the fee history cache configuration using a closure.
+    pub fn modify_fee_history_cache_config<F>(mut self, f: F) -> Self
+    where
+        F: FnOnce(&mut FeeHistoryCacheConfig),
+    {
+        f(&mut self.fee_history_cache_config);
+        self
+    }
+
+    /// Modifies the ETH state cache configuration using a closure.
+    pub fn modify_eth_state_cache_config<F>(mut self, f: F) -> Self
+    where
+        F: FnOnce(&mut EthStateCacheConfig),
+    {
+        f(&mut self.eth_state_cache_config);
+        self
+    }
+
+    /// Modifies the gas oracle configuration using a closure.
+    pub fn modify_gas_oracle_config<F>(mut self, f: F) -> Self
+    where
+        F: FnOnce(&mut GasPriceOracleConfig),
+    {
+        f(&mut self.gas_oracle_config);
+        self
+    }
+
+    /// Modifies the raw tx forwarder configuration using a closure.
+    pub fn modify_raw_tx_forwarder<F>(mut self, f: F) -> Self
+    where
+        F: FnOnce(&mut ForwardConfig),
+    {
+        f(&mut self.raw_tx_forwarder);
+        self
+    }
+
     /// Builds the [`EthApiInner`] instance.
     ///
     /// If not configured, this will spawn the cache backend: [`EthStateCache::spawn`].