fix cli: make port Option<u16> again (#14088)

substrate/client/cli/src/commands/run_cmd.rs

@@ -24,6 +24,8 @@ use crate::{
 		TransactionPoolParams,
 	},
 	CliConfiguration, PrometheusParams, RuntimeParams, TelemetryParams,
+	RPC_DEFAULT_MAX_CONNECTIONS, RPC_DEFAULT_MAX_REQUEST_SIZE_MB, RPC_DEFAULT_MAX_RESPONSE_SIZE_MB,
+	RPC_DEFAULT_MAX_SUBS_PER_CONN,
 };
 use clap::Parser;
 use regex::Regex;
@@ -78,23 +80,23 @@ pub struct RunCmd {
 	pub rpc_methods: RpcMethods,
 
 	/// Set the the maximum RPC request payload size for both HTTP and WS in megabytes.
-	#[arg(long, default_value_t = 15)]
+	#[arg(long, default_value_t = RPC_DEFAULT_MAX_REQUEST_SIZE_MB)]
 	pub rpc_max_request_size: u32,
 
 	/// Set the the maximum RPC response payload size for both HTTP and WS in megabytes.
-	#[arg(long, default_value_t = 15)]
+	#[arg(long, default_value_t = RPC_DEFAULT_MAX_RESPONSE_SIZE_MB)]
 	pub rpc_max_response_size: u32,
 
 	/// Set the the maximum concurrent subscriptions per connection.
-	#[arg(long, default_value_t = 1024)]
+	#[arg(long, default_value_t = RPC_DEFAULT_MAX_SUBS_PER_CONN)]
 	pub rpc_max_subscriptions_per_connection: u32,
 
 	/// Specify JSON-RPC server TCP port.
-	#[arg(long, value_name = "PORT", default_value_t = 9944)]
-	pub rpc_port: u16,
+	#[arg(long, value_name = "PORT")]
+	pub rpc_port: Option<u16>,
 
 	/// Maximum number of RPC server connections.
-	#[arg(long, value_name = "COUNT", default_value_t = 100)]
+	#[arg(long, value_name = "COUNT", default_value_t = RPC_DEFAULT_MAX_CONNECTIONS)]
 	pub rpc_max_connections: u32,
 
 	/// Specify browser Origins allowed to access the HTTP & WS RPC servers.
@@ -336,7 +338,7 @@ impl CliConfiguration for RunCmd {
 			.into())
 	}
 
-	fn rpc_addr(&self, _default_listen_port: u16) -> Result<Option<SocketAddr>> {
+	fn rpc_addr(&self, default_listen_port: u16) -> Result<Option<SocketAddr>> {
 		let interface = rpc_interface(
 			self.rpc_external,
 			self.unsafe_rpc_external,
@@ -344,7 +346,7 @@ impl CliConfiguration for RunCmd {
 			self.validator,
 		)?;
 
-		Ok(Some(SocketAddr::new(interface, self.rpc_port)))
+		Ok(Some(SocketAddr::new(interface, self.rpc_port.unwrap_or(default_listen_port))))
 	}
 
 	fn rpc_methods(&self) -> Result<sc_service::config::RpcMethods> {

substrate/client/cli/src/config.rs

@@ -45,6 +45,17 @@ pub(crate) const DEFAULT_NETWORK_CONFIG_PATH: &str = "network";
 /// The recommended open file descriptor limit to be configured for the process.
 const RECOMMENDED_OPEN_FILE_DESCRIPTOR_LIMIT: u64 = 10_000;
 
+/// The default port.
+pub const RPC_DEFAULT_PORT: u16 = 9944;
+/// The default max number of subscriptions per connection.
+pub const RPC_DEFAULT_MAX_SUBS_PER_CONN: u32 = 1024;
+/// The default max request size in MB.
+pub const RPC_DEFAULT_MAX_REQUEST_SIZE_MB: u32 = 15;
+/// The default max response size in MB.
+pub const RPC_DEFAULT_MAX_RESPONSE_SIZE_MB: u32 = 15;
+/// The default number of connection..
+pub const RPC_DEFAULT_MAX_CONNECTIONS: u32 = 100;
+
 /// Default configuration values used by Substrate
 ///
 /// These values will be used by [`CliConfiguration`] to set
@@ -61,7 +72,7 @@ pub trait DefaultConfigurationValues {
 	///
 	/// By default this is `9944`.
 	fn rpc_listen_port() -> u16 {
-		9944
+		RPC_DEFAULT_PORT
 	}
 
 	/// The port Substrate should listen on for prometheus connections.
@@ -303,14 +314,14 @@ pub trait CliConfiguration<DCV: DefaultConfigurationValues = ()>: Sized {
 	/// Returns the RPC method set to expose.
 	///
 	/// By default this is `RpcMethods::Auto` (unsafe RPCs are denied iff
-	/// `{rpc,ws}_external` returns true, respectively).
+	/// `rpc_external` returns true, respectively).
 	fn rpc_methods(&self) -> Result<RpcMethods> {
 		Ok(Default::default())
 	}
 
 	/// Get the maximum number of RPC server connections.
 	fn rpc_max_connections(&self) -> Result<u32> {
-		Ok(Default::default())
+		Ok(RPC_DEFAULT_MAX_CONNECTIONS)
 	}
 
 	/// Get the RPC cors (`None` if disabled)
@@ -322,17 +333,17 @@ pub trait CliConfiguration<DCV: DefaultConfigurationValues = ()>: Sized {
 
 	/// Get maximum RPC request payload size.
 	fn rpc_max_request_size(&self) -> Result<u32> {
-		Ok(Default::default())
+		Ok(RPC_DEFAULT_MAX_REQUEST_SIZE_MB)
 	}
 
 	/// Get maximum RPC response payload size.
 	fn rpc_max_response_size(&self) -> Result<u32> {
-		Ok(Default::default())
+		Ok(RPC_DEFAULT_MAX_RESPONSE_SIZE_MB)
 	}
 
 	/// Get maximum number of subscriptions per connection.
 	fn rpc_max_subscriptions_per_connection(&self) -> Result<u32> {
-		Ok(Default::default())
+		Ok(RPC_DEFAULT_MAX_SUBS_PER_CONN)
 	}
 
 	/// Get the prometheus configuration (`None` if disabled)
@@ -506,6 +517,7 @@ pub trait CliConfiguration<DCV: DefaultConfigurationValues = ()>: Sized {
 			rpc_max_response_size: self.rpc_max_response_size()?,
 			rpc_id_provider: None,
 			rpc_max_subs_per_conn: self.rpc_max_subscriptions_per_connection()?,
+			rpc_port: DCV::rpc_listen_port(),
 			prometheus_config: self
 				.prometheus_config(DCV::prometheus_listen_port(), &chain_spec)?,
 			telemetry_endpoints,

substrate/client/cli/src/runner.rs

@@ -296,6 +296,7 @@ mod tests {
 				rpc_max_response_size: Default::default(),
 				rpc_id_provider: Default::default(),
 				rpc_max_subs_per_conn: Default::default(),
+				rpc_port: 9944,
 				prometheus_config: None,
 				telemetry_endpoints: None,
 				default_heap_pages: None,