CLI options for light client

parity/cli/config.full.toml

@@ -38,7 +38,7 @@ warp = true
 allow_ips = "all"
 snapshot_peers = 0
 max_pending_peers = 64
-serve_light = true
+no_serve_light = false
 
 reserved_only = false
 reserved_peers = "./path_to_file"

parity/cli/mod.rs

@@ -93,6 +93,7 @@ usage! {
 		flag_chain: String = "foundation", or |c: &Config| otry!(c.parity).chain.clone(),
 		flag_keys_path: String = "$BASE/keys", or |c: &Config| otry!(c.parity).keys_path.clone(),
 		flag_identity: String = "", or |c: &Config| otry!(c.parity).identity.clone(),
+		flag_light: bool = false, or |c: &Config| otry!(c.parity).light,
 
 		// -- Account Options
 		flag_unlock: Option<String> = None,
@@ -148,6 +149,8 @@ usage! {
 		flag_reserved_only: bool = false,
 			or |c: &Config| otry!(c.network).reserved_only.clone(),
 		flag_no_ancient_blocks: bool = false, or |_| None,
+		flag_no_serve_light: bool = false,
+			or |c: &Config| otry!(c.network).no_serve_light.clone(),
 
 		// -- API and Console Options
 		// RPC
@@ -372,6 +375,7 @@ struct Operating {
 	db_path: Option<String>,
 	keys_path: Option<String>,
 	identity: Option<String>,
+	light: Option<bool>,
 }
 
 #[derive(Default, Debug, PartialEq, RustcDecodable)]
@@ -407,6 +411,7 @@ struct Network {
 	node_key: Option<String>,
 	reserved_peers: Option<String>,
 	reserved_only: Option<bool>,
+	no_serve_light: Option<bool>,
 }
 
 #[derive(Default, Debug, PartialEq, RustcDecodable)]
@@ -630,6 +635,7 @@ mod tests {
 			flag_db_path: Some("$HOME/.parity/chains".into()),
 			flag_keys_path: "$HOME/.parity/keys".into(),
 			flag_identity: "".into(),
+			flag_light: false,
 
 			// -- Account Options
 			flag_unlock: Some("0xdeadbeefcafe0000000000000000000000000000".into()),
@@ -660,6 +666,7 @@ mod tests {
 			flag_reserved_peers: Some("./path_to_file".into()),
 			flag_reserved_only: false,
 			flag_no_ancient_blocks: false,
+			flag_no_serve_light: false,
 
 			// -- API and Console Options
 			// RPC
@@ -832,6 +839,7 @@ mod tests {
 				db_path: None,
 				keys_path: None,
 				identity: None,
+				light: None,
 			}),
 			account: Some(Account {
 				unlock: Some(vec!["0x1".into(), "0x2".into(), "0x3".into()]),
@@ -861,6 +869,7 @@ mod tests {
 				node_key: None,
 				reserved_peers: Some("./path/to/reserved_peers".into()),
 				reserved_only: Some(true),
+				no_serve_light: None,
 			}),
 			rpc: Some(Rpc {
 				disable: Some(true),

parity/cli/usage.txt

@@ -67,6 +67,10 @@ Operating Options:
   --keys-path PATH               Specify the path for JSON key files to be found
                                  (default: {flag_keys_path}).
   --identity NAME                Specify your node's name. (default: {flag_identity})
+  --light                        Experimental: run in light client mode. Light clients
+                                 synchronize a bare minimum of data and fetch necessary
+								 data on-demand from the network. Much lower in storage,
+								 potentially higher in bandwidth. (default: {flag_light})
 
 Account Options:
   --unlock ACCOUNTS              Unlock ACCOUNTS for the duration of the execution.
@@ -126,6 +130,7 @@ Networking Options:
   --max-pending-peers NUM        Allow up to NUM pending connections. (default: {flag_max_pending_peers})
   --no-ancient-blocks            Disable downloading old blocks after snapshot restoration
                                  or warp sync. (default: {flag_no_ancient_blocks})
+  --no-serve-light               Disable serving of light peers. (default: {flag_no_serve_light})
 
 API and Console Options:
   --no-jsonrpc                   Disable the JSON-RPC API server. (default: {flag_no_jsonrpc})