add eth_blockNumber to rpc

src/client/client.rs

@@ -90,6 +90,11 @@ impl Client {
         Ok(tip)
     }
 
+    pub async fn get_block_number(&self) -> Result<u64> {
+        let payload = self.consensus.get_execution_payload().await?;
+        Ok(payload.block_number)
+    }
+
     pub fn chain_id(&self) -> u64 {
         self.config.general.chain_id
     }

src/client/rpc.rs

@@ -57,6 +57,8 @@ trait EthRpc {
     async fn gas_price(&self) -> Result<String, Error>;
     #[method(name = "maxPriorityFeePerGas")]
     async fn max_priority_fee_per_gas(&self) -> Result<String, Error>;
+    #[method(name = "blockNumber")]
+    async fn block_number(&self) -> Result<String, Error>;
 }
 
 struct RpcInner {
@@ -144,6 +146,11 @@ impl EthRpcServer for RpcInner {
         let tip = convert_err(self.client.get_priority_fee().await)?;
         Ok(tip.encode_hex())
     }
+
+    async fn block_number(&self) -> Result<String, Error> {
+        let num = convert_err(self.client.get_block_number().await)?;
+        Ok(u64_to_hex_string(num))
+    }
 }
 
 async fn start(rpc: RpcInner) -> Result<(HttpServerHandle, SocketAddr)> {