Mode improvements for UI (#3109)

* `--mode=off` now works.

* Add Mode::Off as a persistent CLI option.

* "last" not "auto" as default.

* Commit accidentally unsaved file.

* Whitespace

[ci:skip]

* Mode CLI parse fix

* or offline

* Save mode when it gets changed.

* Fix Offline mode

* Fix up mode operations.

* Make passive default, but not overriding.

* Fix test

* Maybe not everyone wants to run an archive node...

ethcore/src/client/client.rs

@@ -147,6 +147,7 @@ pub struct Client {
 	factories: Factories,
 	history: u64,
 	rng: Mutex<OsRng>,
+	on_mode_change: Mutex<Option<Box<FnMut(&Mode) + 'static + Send>>>,
 }
 
 impl Client {
@@ -211,7 +212,7 @@ impl Client {
 		let panic_handler = PanicHandler::new_in_arc();
 		panic_handler.forward_from(&block_queue);
 
-		let awake = match config.mode { Mode::Dark(..) => false, _ => true };
+		let awake = match config.mode { Mode::Dark(..) | Mode::Off => false, _ => true };
 
 		let factories = Factories {
 			vm: EvmFactory::new(config.vm_type.clone(), config.jump_table_size),
@@ -243,6 +244,7 @@ impl Client {
 			factories: factories,
 			history: history,
 			rng: Mutex::new(try!(OsRng::new().map_err(::util::UtilError::StdIo))),
+			on_mode_change: Mutex::new(None),
 		};
 		Ok(Arc::new(client))
 	}
@@ -260,6 +262,11 @@ impl Client {
 		}
 	}
 
+	/// Register an action to be done if a mode change happens. 
+	pub fn on_mode_change<F>(&self, f: F) where F: 'static + FnMut(&Mode) + Send {
+		*self.on_mode_change.lock() = Some(Box::new(f));
+	}
+
 	/// Flush the block import queue.
 	pub fn flush_queue(&self) {
 		self.block_queue.flush();
@@ -856,18 +863,37 @@ impl BlockChainClient for Client {
 	}
 
 	fn keep_alive(&self) {
-		let mode = self.mode.lock().clone();
+		let should_wake = match &*self.mode.lock() {
-		if mode != Mode::Active {
+			&Mode::Dark(..) | &Mode::Passive(..) => true,
+			_ => false,
+		};
+		if should_wake {
 			self.wake_up();
 			(*self.sleep_state.lock()).last_activity = Some(Instant::now());
 		}
 	}
 
-	fn mode(&self) -> IpcMode { self.mode.lock().clone().into() }
+	fn mode(&self) -> IpcMode {
+		let r = self.mode.lock().clone().into();
+		trace!(target: "mode", "Asked for mode = {:?}. returning {:?}", &*self.mode.lock(), r);
+		r
+	}
 
-	fn set_mode(&self, mode: IpcMode) {
+	fn set_mode(&self, new_mode: IpcMode) {
-		*self.mode.lock() = mode.clone().into();
+		trace!(target: "mode", "Client::set_mode({:?})", new_mode);
-		match mode {
+		{
+			let mut mode = self.mode.lock();
+			*mode = new_mode.clone().into();
+			trace!(target: "mode", "Mode now {:?}", &*mode);
+			match *self.on_mode_change.lock() {
+				Some(ref mut f) => {
+					trace!(target: "mode", "Making callback...");
+					f(&*mode)
+				},
+				_ => {} 
+			}
+		}
+		match new_mode {
 			IpcMode::Active => self.wake_up(),
 			IpcMode::Off => self.sleep(),
 			_ => {(*self.sleep_state.lock()).last_activity = Some(Instant::now()); }

ethcore/src/client/config.rs

@@ -16,6 +16,7 @@
 
 use std::str::FromStr;
 use std::path::Path;
+use std::fmt::{Display, Formatter, Error as FmtError};
 pub use std::time::Duration;
 pub use blockchain::Config as BlockChainConfig;
 pub use trace::Config as TraceConfig;
@@ -86,6 +87,17 @@ impl Default for Mode {
 	}
 }
 
+impl Display for Mode {
+	fn fmt(&self, f: &mut Formatter) -> Result<(), FmtError> {
+		match *self {
+			Mode::Active => write!(f, "active"),
+			Mode::Passive(..) => write!(f, "passive"),
+			Mode::Dark(..) => write!(f, "dark"),
+			Mode::Off => write!(f, "offline"),
+		}
+	}
+}
+
 /// Client configuration. Includes configs for all sub-systems.
 #[derive(Debug, PartialEq, Default)]
 pub struct ClientConfig {

ethcore/src/types/mode.rs

@@ -20,7 +20,7 @@ pub use std::time::Duration;
 use client::Mode as ClientMode;
 
 /// IPC-capable shadow-type for client::config::Mode
-#[derive(Clone, Binary)]
+#[derive(Clone, Binary, Debug)]
 pub enum Mode {
 	/// Same as ClientMode::Off.
 	Off,

js/src/jsonrpc/interfaces/ethcore.js

@@ -166,7 +166,7 @@ export default {
   },
 
   mode: {
-    desc: 'Get the mode. Results one of: "active", "passive", "dark", "off".',
+    desc: 'Get the mode. Results one of: "active", "passive", "dark", "offline".',
     params: [],
     returns: {
       type: String,
@@ -330,7 +330,7 @@ export default {
     params: [
       {
         type: String,
-        desc: 'The mode to set, one of "active", "passive", "dark", "off"'
+        desc: 'The mode to set, one of "active", "passive", "dark", "offline"'
       }
     ],
     returns: {

js/src/views/Status/data/rpc.json

@@ -926,6 +926,16 @@
       ],
       "outputFormatter": null
     },
+    {
+      "name": "ethcore_setMode",
+      "desc": "Changes current operating mode",
+      "params": [
+        "`DATA`- Mode name"
+      ],
+      "returns": "`Boolean` - whether the call was successful",
+      "inputFormatters": null,
+      "outputFormatter": null
+    },
     {
       "name": "ethcore_setMinGasPrice",
       "desc": "Changes minimal gas price for transaction to be accepted to the queue.",
@@ -1030,6 +1040,14 @@
       "inputFormatters": [],
       "outputFormatter": null
     },
+    {
+      "name": "ethcore_mode",
+      "desc": "Returns current mode",
+      "params": [],
+      "returns": "`DATA` - Mode",
+      "inputFormatters": [],
+      "outputFormatter": null
+    },
     {
       "name": "trace_filter",
       "desc": "Returns traces matching given filter",

mac/post-install.sh

@@ -11,8 +11,6 @@ cat > $HOME/Library/LaunchAgents/io.parity.ethereum.plist <<EOF
     <key>ProgramArguments</key>
     <array>
         <string>/usr/local/libexec/parity</string>
-        <string>--mode</string>
-        <string>passive</string>
         <string>--warp</string>
     </array>
     <key>KeepAlive</key>
@@ -26,9 +24,11 @@ cat > $HOME/Library/LaunchAgents/io.parity.ethereum.plist <<EOF
 </dict>
 </plist>
 EOF
-mkdir -p $HOME/.parity
 
-chown $USER $HOME/.parity $HOME/Library/LaunchAgents $HOME/Library/LaunchAgents/io.parity.ethereum.plist
+mkdir -p $HOME/.parity/906a34e69aec8c0d
+echo -n '{"fat_db":false,"mode":"passive","pruning":"fast","tracing":false}' > $HOME/.parity/906a34e69aec8c0d/user_defaults
+
+chown -R $USER $HOME/.parity $HOME/Library/LaunchAgents $HOME/Library/LaunchAgents/io.parity.ethereum.plist
 
 su $USER -c "launchctl load $HOME/Library/LaunchAgents/io.parity.ethereum.plist"
 sleep 1

parity/blockchain.rs

@@ -78,7 +78,6 @@ pub struct ImportBlockchain {
 	pub pruning_history: u64,
 	pub compaction: DatabaseCompactionProfile,
 	pub wal: bool,
-	pub mode: Mode,
 	pub tracing: Switch,
 	pub fat_db: Switch,
 	pub vm_type: VMType,
@@ -97,7 +96,6 @@ pub struct ExportBlockchain {
 	pub pruning_history: u64,
 	pub compaction: DatabaseCompactionProfile,
 	pub wal: bool,
-	pub mode: Mode,
 	pub fat_db: Switch,
 	pub tracing: Switch,
 	pub from_block: BlockID,
@@ -155,7 +153,7 @@ fn execute_import(cmd: ImportBlockchain) -> Result<String, String> {
 	try!(execute_upgrades(&db_dirs, algorithm, cmd.compaction.compaction_profile(db_dirs.fork_path().as_path())));
 
 	// prepare client config
-	let client_config = to_client_config(&cmd.cache_config, cmd.mode, tracing, fat_db, cmd.compaction, cmd.wal, cmd.vm_type,  "".into(), algorithm, cmd.pruning_history, cmd.check_seal);
+	let client_config = to_client_config(&cmd.cache_config, Mode::Active, tracing, fat_db, cmd.compaction, cmd.wal, cmd.vm_type,  "".into(), algorithm, cmd.pruning_history, cmd.check_seal);
 
 	// build client
 	let service = try!(ClientService::start(
@@ -303,7 +301,7 @@ fn execute_export(cmd: ExportBlockchain) -> Result<String, String> {
 	try!(execute_upgrades(&db_dirs, algorithm, cmd.compaction.compaction_profile(db_dirs.fork_path().as_path())));
 
 	// prepare client config
-	let client_config = to_client_config(&cmd.cache_config, cmd.mode, tracing, fat_db, cmd.compaction, cmd.wal, VMType::default(), "".into(), algorithm, cmd.pruning_history, cmd.check_seal);
+	let client_config = to_client_config(&cmd.cache_config, Mode::Active, tracing, fat_db, cmd.compaction, cmd.wal, VMType::default(), "".into(), algorithm, cmd.pruning_history, cmd.check_seal);
 
 	let service = try!(ClientService::start(
 		client_config,

parity/cli/config.full.toml

@@ -1,5 +1,5 @@
 [parity]
-mode = "active"
+mode = "last"
 mode_timeout = 300
 mode_alarm = 3600
 chain = "homestead"

parity/cli/mod.rs

@@ -74,7 +74,7 @@ usage! {
 	}
 	{
 		// -- Operating Options
-		flag_mode: String = "active", or |c: &Config| otry!(c.parity).mode.clone(),
+		flag_mode: String = "last", or |c: &Config| otry!(c.parity).mode.clone(),
 		flag_mode_timeout: u64 = 300u64, or |c: &Config| otry!(c.parity).mode_timeout.clone(),
 		flag_mode_alarm: u64 = 3600u64, or |c: &Config| otry!(c.parity).mode_alarm.clone(),
 		flag_chain: String = "homestead", or |c: &Config| otry!(c.parity).chain.clone(),
@@ -104,8 +104,6 @@ usage! {
 		flag_signer_no_validation: bool = false, or |_| None,
 
 		// -- Networking Options
-		flag_no_network: bool = false,
-			or |c: &Config| otry!(c.network).disable.clone(),
 		flag_warp: bool = false,
 			or |c: &Config| otry!(c.network).warp.clone(),
 		flag_port: u16 = 30303u16,
@@ -500,7 +498,7 @@ mod tests {
 			arg_path: vec![],
 
 			// -- Operating Options
-			flag_mode: "active".into(),
+			flag_mode: "last".into(),
 			flag_mode_timeout: 300u64,
 			flag_mode_alarm: 3600u64,
 			flag_chain: "xyz".into(),
@@ -521,7 +519,6 @@ mod tests {
 			flag_signer_no_validation: false,
 
 			// -- Networking Options
-			flag_no_network: false,
 			flag_warp: true,
 			flag_port: 30303u16,
 			flag_min_peers: 25u16,

parity/cli/usage.txt

@@ -18,11 +18,12 @@ Usage:
 
 Operating Options:
   --mode MODE              Set the operating mode. MODE can be one of:
+                           last - Uses the last-used mode, active if none.
                            active - Parity continuously syncs the chain.
                            passive - Parity syncs initially, then sleeps and
                            wakes regularly to resync.
-                           dark - Parity syncs only when an external interface
+                           dark - Parity syncs only when the RPC is active.
-                           is active. (default: {flag_mode}).
+                           offline - Parity doesn't sync. (default: {flag_mode}).
   --mode-timeout SECS      Specify the number of seconds before inactivity
                            timeout occurs when mode is dark or passive
                            (default: {flag_mode_timeout}).
@@ -66,7 +67,6 @@ Account Options:
                            development. (default: {flag_signer_no_validation})
 
 Networking Options:
-  --no-network             Disable p2p networking. (default: {flag_no_network})
   --warp                   Enable syncing from the snapshot over the network. (default: {flag_warp})
   --port PORT              Override the port on which the node should listen
                            (default: {flag_port}).

parity/configuration.rs

@@ -23,7 +23,7 @@ use cli::{Args, ArgsError};
 use util::{Hashable, U256, Uint, Bytes, version_data, Secret, Address};
 use util::log::Colour;
 use ethsync::{NetworkConfiguration, is_valid_node_url, AllowIP};
-use ethcore::client::{VMType, Mode};
+use ethcore::client::VMType;
 use ethcore::miner::{MinerOptions, Banning};
 
 use rpc::{IpcConfiguration, HttpConfiguration};
@@ -80,7 +80,7 @@ impl Configuration {
 		let pruning = try!(self.args.flag_pruning.parse());
 		let pruning_history = self.args.flag_pruning_history;
 		let vm_type = try!(self.vm_type());
-		let mode = try!(to_mode(&self.args.flag_mode, self.args.flag_mode_timeout, self.args.flag_mode_alarm));
+		let mode = match self.args.flag_mode.as_ref() { "last" => None, mode => Some(try!(to_mode(&mode, self.args.flag_mode_timeout, self.args.flag_mode_alarm))), };
 		let miner_options = try!(self.miner_options());
 		let logger_config = self.logger_config();
 		let http_conf = try!(self.http_config());
@@ -93,7 +93,6 @@ impl Configuration {
 		let fat_db = try!(self.args.flag_fat_db.parse());
 		let compaction = try!(self.args.flag_db_compaction.parse());
 		let wal = !self.args.flag_fast_and_loose;
-		let enable_network = self.enable_network(&mode);
 		let warp_sync = self.args.flag_warp;
 		let geth_compatibility = self.args.flag_geth;
 		let signer_port = self.signer_port();
@@ -156,7 +155,6 @@ impl Configuration {
 				pruning_history: pruning_history,
 				compaction: compaction,
 				wal: wal,
-				mode: mode,
 				tracing: tracing,
 				fat_db: fat_db,
 				vm_type: vm_type,
@@ -175,7 +173,6 @@ impl Configuration {
 				pruning_history: pruning_history,
 				compaction: compaction,
 				wal: wal,
-				mode: mode,
 				tracing: tracing,
 				fat_db: fat_db,
 				from_block: try!(to_block_id(&self.args.flag_from)),
@@ -190,7 +187,6 @@ impl Configuration {
 				spec: spec,
 				pruning: pruning,
 				pruning_history: pruning_history,
-				mode: mode,
 				tracing: tracing,
 				fat_db: fat_db,
 				compaction: compaction,
@@ -207,7 +203,6 @@ impl Configuration {
 				spec: spec,
 				pruning: pruning,
 				pruning_history: pruning_history,
-				mode: mode,
 				tracing: tracing,
 				fat_db: fat_db,
 				compaction: compaction,
@@ -246,7 +241,6 @@ impl Configuration {
 				compaction: compaction,
 				wal: wal,
 				vm_type: vm_type,
-				enable_network: enable_network,
 				warp_sync: warp_sync,
 				geth_compatibility: geth_compatibility,
 				signer_port: signer_port,
@@ -268,13 +262,6 @@ impl Configuration {
 		})
 	}
 
-	fn enable_network(&self, mode: &Mode) -> bool {
-		match *mode {
-			Mode::Dark(_) => false,
-			_ => !self.args.flag_no_network,
-		}
-	}
-
 	fn vm_type(&self) -> Result<VMType, String> {
 		if self.args.flag_jitvm {
 			VMType::jit().ok_or("Parity is built without the JIT EVM.".into())
@@ -767,7 +754,6 @@ mod tests {
 			pruning_history: 64,
 			compaction: Default::default(),
 			wal: true,
-			mode: Default::default(),
 			tracing: Default::default(),
 			fat_db: Default::default(),
 			vm_type: VMType::Interpreter,
@@ -790,7 +776,6 @@ mod tests {
 			format: Default::default(),
 			compaction: Default::default(),
 			wal: true,
-			mode: Default::default(),
 			tracing: Default::default(),
 			fat_db: Default::default(),
 			from_block: BlockID::Number(1),
@@ -813,7 +798,6 @@ mod tests {
 			format: Some(DataFormat::Hex),
 			compaction: Default::default(),
 			wal: true,
-			mode: Default::default(),
 			tracing: Default::default(),
 			fat_db: Default::default(),
 			from_block: BlockID::Number(1),
@@ -858,7 +842,6 @@ mod tests {
 			compaction: Default::default(),
 			wal: true,
 			vm_type: Default::default(),
-			enable_network: true,
 			geth_compatibility: false,
 			signer_port: Some(8180),
 			net_settings: Default::default(),

parity/helpers.rs

@@ -58,7 +58,8 @@ pub fn to_mode(s: &str, timeout: u64, alarm: u64) -> Result<Mode, String> {
 		"active" => Ok(Mode::Active),
 		"passive" => Ok(Mode::Passive(Duration::from_secs(timeout), Duration::from_secs(alarm))),
 		"dark" => Ok(Mode::Dark(Duration::from_secs(timeout))),
-		_ => Err(format!("{}: Invalid address for --mode. Must be one of active, passive or dark.", s)),
+		"offline" => Ok(Mode::Off),
+		_ => Err(format!("{}: Invalid value for --mode. Must be one of active, passive, dark or offline.", s)),
 	}
 }
 

parity/params.rs

@@ -20,6 +20,7 @@ use util::{Address, U256, version_data};
 use util::journaldb::Algorithm;
 use ethcore::spec::Spec;
 use ethcore::ethereum;
+use ethcore::client::Mode;
 use ethcore::miner::{GasPricer, GasPriceCalibratorOptions};
 use user_defaults::UserDefaults;
 
@@ -264,6 +265,10 @@ pub fn fatdb_switch_to_bool(switch: Switch, user_defaults: &UserDefaults, algori
 	result
 }
 
+pub fn mode_switch_to_bool(switch: Option<Mode>, user_defaults: &UserDefaults) -> Result<Mode, String> {
+	Ok(switch.unwrap_or(user_defaults.mode.clone()))
+}
+
 #[cfg(test)]
 mod tests {
 	use util::journaldb::Algorithm;

parity/run.rs

@@ -37,7 +37,7 @@ use dapps::WebappServer;
 use io_handler::ClientIoHandler;
 use params::{
 	SpecType, Pruning, AccountsConfig, GasPricerConfig, MinerExtras, Switch,
-	tracing_switch_to_bool, fatdb_switch_to_bool,
+	tracing_switch_to_bool, fatdb_switch_to_bool, mode_switch_to_bool
 };
 use helpers::{to_client_config, execute_upgrades, passwords_from_files};
 use dir::Directories;
@@ -75,13 +75,12 @@ pub struct RunCmd {
 	pub acc_conf: AccountsConfig,
 	pub gas_pricer: GasPricerConfig,
 	pub miner_extras: MinerExtras,
-	pub mode: Mode,
+	pub mode: Option<Mode>,
 	pub tracing: Switch,
 	pub fat_db: Switch,
 	pub compaction: DatabaseCompactionProfile,
 	pub wal: bool,
 	pub vm_type: VMType,
-	pub enable_network: bool,
 	pub geth_compatibility: bool,
 	pub signer_port: Option<u16>,
 	pub net_settings: NetworkSettings,
@@ -137,6 +136,11 @@ pub fn execute(cmd: RunCmd, logger: Arc<RotatingLogger>) -> Result<(), String> {
 	// check if fatdb is on
 	let fat_db = try!(fatdb_switch_to_bool(cmd.fat_db, &user_defaults, algorithm));
 
+	// get the mode
+	let mode = try!(mode_switch_to_bool(cmd.mode, &user_defaults));
+	trace!(target: "mode", "mode is {:?}", mode);
+	let network_enabled = match &mode { &Mode::Dark(_) | &Mode::Off => false, _ => true, };
+
 	// prepare client and snapshot paths.
 	let client_path = db_dirs.client_path(algorithm);
 	let snapshot_path = db_dirs.snapshot_path();
@@ -162,6 +166,7 @@ pub fn execute(cmd: RunCmd, logger: Arc<RotatingLogger>) -> Result<(), String> {
 			false => "".to_owned(),
 		}
 	);
+	info!("Operating mode: {}", Colour::White.bold().paint(format!("{}", mode)));
 
 	// display warning about using experimental journaldb alorithm
 	if !algorithm.is_stable() {
@@ -196,7 +201,7 @@ pub fn execute(cmd: RunCmd, logger: Arc<RotatingLogger>) -> Result<(), String> {
 	// create client config
 	let client_config = to_client_config(
 		&cmd.cache_config,
-		cmd.mode,
+		mode,
 		tracing,
 		fat_db,
 		cmd.compaction,
@@ -248,7 +253,7 @@ pub fn execute(cmd: RunCmd, logger: Arc<RotatingLogger>) -> Result<(), String> {
 	service.add_notify(chain_notify.clone());
 
 	// start network
-	if cmd.enable_network {
+	if network_enabled {
 		chain_notify.start();
 	}
 
@@ -321,6 +326,19 @@ pub fn execute(cmd: RunCmd, logger: Arc<RotatingLogger>) -> Result<(), String> {
 	});
 	service.register_io_handler(io_handler.clone()).expect("Error registering IO handler");
 
+	// save user defaults
+	user_defaults.pruning = algorithm;
+	user_defaults.tracing = tracing;
+	try!(user_defaults.save(&user_defaults_path));
+
+	let on_mode_change = move |mode: &Mode| {
+		user_defaults.mode = mode.clone();
+		let _ = user_defaults.save(&user_defaults_path);	// discard failures - there's nothing we can do
+	};
+
+	// tell client how to save the default mode if it gets changed.
+	client.on_mode_change(on_mode_change);
+
 	// the watcher must be kept alive.
 	let _watcher = match cmd.no_periodic_snapshot {
 		true => None,
@@ -347,11 +365,6 @@ pub fn execute(cmd: RunCmd, logger: Arc<RotatingLogger>) -> Result<(), String> {
 		url::open(&format!("http://{}:{}/", cmd.dapps_conf.interface, cmd.dapps_conf.port));
 	}
 
-	// save user defaults
-	user_defaults.pruning = algorithm;
-	user_defaults.tracing = tracing;
-	try!(user_defaults.save(&user_defaults_path));
-
 	// Handle exit
 	wait_for_exit(panic_handler, http_server, ipc_server, dapps_server, signer_server);
 

parity/snapshot.rs

@@ -54,7 +54,6 @@ pub struct SnapshotCommand {
 	pub spec: SpecType,
 	pub pruning: Pruning,
 	pub pruning_history: u64,
-	pub mode: Mode,
 	pub tracing: Switch,
 	pub fat_db: Switch,
 	pub compaction: DatabaseCompactionProfile,
@@ -158,7 +157,7 @@ impl SnapshotCommand {
 		try!(execute_upgrades(&db_dirs, algorithm, self.compaction.compaction_profile(db_dirs.fork_path().as_path())));
 
 		// prepare client config
-		let client_config = to_client_config(&self.cache_config, self.mode, tracing, fat_db, self.compaction, self.wal, VMType::default(), "".into(), algorithm, self.pruning_history, true);
+		let client_config = to_client_config(&self.cache_config, Mode::Active, tracing, fat_db, self.compaction, self.wal, VMType::default(), "".into(), algorithm, self.pruning_history, true);
 
 		let service = try!(ClientService::start(
 			client_config,

parity/user_defaults.rs

@@ -18,6 +18,7 @@ use std::fs::File;
 use std::io::Write;
 use std::path::Path;
 use std::collections::BTreeMap;
+use std::time::Duration;
 use serde::{Serialize, Serializer, Error, Deserialize, Deserializer};
 use serde::de::{Visitor, MapVisitor};
 use serde::de::impls::BTreeMapVisitor;
@@ -25,12 +26,14 @@ use serde_json::Value;
 use serde_json::de::from_reader;
 use serde_json::ser::to_string;
 use util::journaldb::Algorithm;
+use ethcore::client::Mode;
 
 pub struct UserDefaults {
 	pub is_first_launch: bool,
 	pub pruning: Algorithm,
 	pub tracing: bool,
 	pub fat_db: bool,
+	pub mode: Mode,
 }
 
 impl Serialize for UserDefaults {
@@ -40,6 +43,21 @@ impl Serialize for UserDefaults {
 		map.insert("pruning".into(), Value::String(self.pruning.as_str().into()));
 		map.insert("tracing".into(), Value::Bool(self.tracing));
 		map.insert("fat_db".into(), Value::Bool(self.fat_db));
+		let mode_str = match self.mode {
+			Mode::Off => "offline",
+			Mode::Dark(timeout) => {
+				map.insert("mode.timeout".into(), Value::U64(timeout.as_secs()));
+				"dark"
+			},
+			Mode::Passive(timeout, alarm) => {
+				map.insert("mode.timeout".into(), Value::U64(timeout.as_secs()));
+				map.insert("mode.alarm".into(), Value::U64(alarm.as_secs()));
+				"passive"
+			},
+			Mode::Active => "active",
+		};
+		map.insert("mode".into(), Value::String(mode_str.into()));
+
 		map.serialize(serializer)
 	}
 }
@@ -67,11 +85,28 @@ impl Visitor for UserDefaultsVisitor {
 		let fat_db: Value = map.remove("fat_db".into()).unwrap_or_else(|| Value::Bool(false));
 		let fat_db = try!(fat_db.as_bool().ok_or_else(|| Error::custom("invalid fat_db value")));
 
+		let mode: Value = map.remove("mode".into()).unwrap_or_else(|| Value::String("active".to_owned()));
+		let mode = match try!(mode.as_str().ok_or_else(|| Error::custom("invalid mode value"))) {
+			"offline" => Mode::Off,
+			"dark" => {
+				let timeout = try!(map.remove("mode.timeout".into()).and_then(|v| v.as_u64()).ok_or_else(|| Error::custom("invalid/missing mode.timeout value")));
+				Mode::Dark(Duration::from_secs(timeout))
+			},
+			"passive" => {
+				let timeout = try!(map.remove("mode.timeout".into()).and_then(|v| v.as_u64()).ok_or_else(|| Error::custom("invalid/missing mode.timeout value")));
+				let alarm = try!(map.remove("mode.alarm".into()).and_then(|v| v.as_u64()).ok_or_else(|| Error::custom("invalid/missing mode.alarm value")));
+				Mode::Passive(Duration::from_secs(timeout), Duration::from_secs(alarm))
+			},
+			"active" => Mode::Active,
+			_ => { return Err(Error::custom("invalid mode value")); },
+		};
+
 		let user_defaults = UserDefaults {
 			is_first_launch: false,
 			pruning: pruning,
 			tracing: tracing,
 			fat_db: fat_db,
+			mode: mode,
 		};
 
 		Ok(user_defaults)
@@ -85,6 +120,7 @@ impl Default for UserDefaults {
 			pruning: Algorithm::default(),
 			tracing: false,
 			fat_db: false,
+			mode: Mode::Active,
 		}
 	}
 }
@@ -97,7 +133,7 @@ impl UserDefaults {
 		}
 	}
 
-	pub fn save<P>(self, path: P) -> Result<(), String> where P: AsRef<Path> {
+	pub fn save<P>(&self, path: P) -> Result<(), String> where P: AsRef<Path> {
 		let mut file: File = try!(File::create(path).map_err(|_| "Cannot create user defaults file".to_owned()));
 		file.write_all(to_string(&self).unwrap().as_bytes()).map_err(|_| "Failed to save user defaults".to_owned())
 	}

rpc/src/v1/impls/ethcore.rs

@@ -351,7 +351,7 @@ impl<C, M, S: ?Sized, F> Ethcore for EthcoreClient<C, M, S, F> where
 
 	fn mode(&self) -> Result<String, Error> {
 		Ok(match take_weak!(self.client).mode() {
-			Mode::Off => "off",
+			Mode::Off => "offline",
 			Mode::Dark(..) => "dark",
 			Mode::Passive(..) => "passive",
 			Mode::Active => "active",

rpc/src/v1/impls/ethcore_set.rs

@@ -151,7 +151,7 @@ impl<C, M> EthcoreSet for EthcoreSetClient<C, M> where
 
 	fn set_mode(&self, mode: String) -> Result<bool, Error> {
 		take_weak!(self.client).set_mode(match mode.as_str() {
-			"off" => Mode::Off,
+			"offline" => Mode::Off,
 			"dark" => Mode::Dark(300),
 			"passive" => Mode::Passive(300, 3600),
 			"active" => Mode::Active,

rpc/src/v1/traits/ethcore.rs

@@ -130,7 +130,7 @@ build_rpc_trait! {
 		#[rpc(name = "ethcore_nextNonce")]
 		fn next_nonce(&self, H160) -> Result<U256, Error>;
 
-		/// Get the mode. Results one of: "active", "passive", "dark", "off".
+		/// Get the mode. Results one of: "active", "passive", "dark", "offline".
 		#[rpc(name = "ethcore_mode")]
 		fn mode(&self) -> Result<String, Error>;
 

rpc/src/v1/traits/ethcore_set.rs

@@ -76,11 +76,11 @@ build_rpc_trait! {
 
 		/// Stop the network.
 		///
-		/// Deprecated. Use `set_mode("off")` instead.
+		/// Deprecated. Use `set_mode("offline")` instead.
 		#[rpc(name = "ethcore_stopNetwork")]
 		fn stop_network(&self) -> Result<bool, Error>;
 
-		/// Set the mode. Argument must be one of: "active", "passive", "dark", "off".
+		/// Set the mode. Argument must be one of: "active", "passive", "dark", "offline".
 		#[rpc(name = "ethcore_setMode")]
 		fn set_mode(&self, String) -> Result<bool, Error>;
 	}