Merge pull request #981 from ethcore/main-refactor

Refactoring of `parity/main.rs`
2016-04-21 18:43:02 +02:00 · 2016-04-21 18:43:02 +02:00 · 5ccf653841
commit 5ccf653841
parent 8381e79da6 ffc5d726bd
10 changed files with 1114 additions and 861 deletions
--- a/parity/cli.rs
+++ b/parity/cli.rs
@ -0,0 +1,223 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+use util::version;
+
+pub const USAGE: &'static str = r#"
+Parity. Ethereum Client.
+  By Wood/Paronyan/Kotewicz/Drwięga/Volf.
+  Copyright 2015, 2016 Ethcore (UK) Limited
+
+Usage:
+  parity daemon <pid-file> [options]
+  parity account (new | list) [options]
+  parity [options]
+
+Protocol Options:
+  --chain CHAIN            Specify the blockchain type. CHAIN may be either a
+                           JSON chain specification file or olympic, frontier,
+                           homestead, mainnet, morden, or testnet
+                           [default: homestead].
+  -d --db-path PATH        Specify the database & configuration directory path
+                           [default: $HOME/.parity].
+  --keys-path PATH         Specify the path for JSON key files to be found
+                           [default: $HOME/.parity/keys].
+  --identity NAME          Specify your node's name.
+
+Account Options:
+  --unlock ACCOUNTS        Unlock ACCOUNTS for the duration of the execution.
+                           ACCOUNTS is a comma-delimited list of addresses.
+  --password FILE          Provide a file containing a password for unlocking
+                           an account.
+
+Networking Options:
+  --port PORT              Override the port on which the node should listen
+                           [default: 30303].
+  --peers NUM              Try to maintain that many peers [default: 25].
+  --nat METHOD             Specify method to use for determining public
+                           address. Must be one of: any, none, upnp,
+                           extip:<IP> [default: any].
+  --network-id INDEX       Override the network identifier from the chain we
+                           are on.
+  --bootnodes NODES        Override the bootnodes from our chain. NODES should
+                           be comma-delimited enodes.
+  --no-discovery           Disable new peer discovery.
+  --node-key KEY           Specify node secret key, either as 64-character hex
+                           string or input to SHA3 operation.
+
+API and Console Options:
+  -j --jsonrpc             Enable the JSON-RPC API server.
+  --jsonrpc-port PORT      Specify the port portion of the JSONRPC API server
+                           [default: 8545].
+  --jsonrpc-interface IP   Specify the hostname portion of the JSONRPC API
+                           server, IP should be an interface's IP address, or
+                           all (all interfaces) or local [default: local].
+  --jsonrpc-cors URL       Specify CORS header for JSON-RPC API responses.
+  --jsonrpc-apis APIS      Specify the APIs available through the JSONRPC
+                           interface. APIS is a comma-delimited list of API
+                           name. Possible name are web3, eth and net.
+                           [default: web3,eth,net,personal,ethcore].
+  -w --webapp              Enable the web applications server (e.g.
+                           status page).
+  --webapp-port PORT       Specify the port portion of the WebApps server
+                           [default: 8080].
+  --webapp-interface IP    Specify the hostname portion of the WebApps
+                           server, IP should be an interface's IP address, or
+                           all (all interfaces) or local [default: local].
+  --webapp-user USERNAME   Specify username for WebApps server. It will be
+                           used in HTTP Basic Authentication Scheme.
+                           If --webapp-pass is not specified you will be
+                           asked for password on startup.
+  --webapp-pass PASSWORD   Specify password for WebApps server. Use only in
+                           conjunction with --webapp-user.
+
+Sealing/Mining Options:
+  --force-sealing          Force the node to author new blocks as if it were
+                           always sealing/mining.
+  --usd-per-tx USD         Amount of USD to be paid for a basic transaction
+                           [default: 0.005]. The minimum gas price is set
+                           accordingly.
+  --usd-per-eth SOURCE     USD value of a single ETH. SOURCE may be either an
+                           amount in USD or a web service [default: etherscan].
+  --gas-floor-target GAS   Amount of gas per block to target when sealing a new
+                           block [default: 4712388].
+  --author ADDRESS         Specify the block author (aka "coinbase") address
+                           for sending block rewards from sealed blocks
+                           [default: 0037a6b811ffeb6e072da21179d11b1406371c63].
+  --extra-data STRING      Specify a custom extra-data for authored blocks, no
+                           more than 32 characters.
+  --tx-limit LIMIT         Limit of transactions kept in the queue (waiting to
+                           be included in next block) [default: 1024].
+
+Footprint Options:
+  --pruning METHOD         Configure pruning of the state/storage trie. METHOD
+                           may be one of auto, archive, basic, fast, light:
+                           archive - keep all state trie data. No pruning.
+                           basic - reference count in disk DB. Slow but light.
+                           fast - maintain journal overlay. Fast but 50MB used.
+                           light - early merges with partial tracking. Fast
+                           and light. Experimental!
+                           auto - use the method most recently synced or
+                           default to archive if none synced [default: auto].
+  --cache-pref-size BYTES  Specify the prefered size of the blockchain cache in
+                           bytes [default: 16384].
+  --cache-max-size BYTES   Specify the maximum size of the blockchain cache in
+                           bytes [default: 262144].
+  --queue-max-size BYTES   Specify the maximum size of memory to use for block
+                           queue [default: 52428800].
+  --cache MEGABYTES        Set total amount of discretionary memory to use for
+                           the entire system, overrides other cache and queue
+                           options.
+
+Geth-compatibility Options:
+  --datadir PATH           Equivalent to --db-path PATH.
+  --testnet                Equivalent to --chain testnet.
+  --networkid INDEX        Equivalent to --network-id INDEX.
+  --maxpeers COUNT         Equivalent to --peers COUNT.
+  --nodekey KEY            Equivalent to --node-key KEY.
+  --nodiscover             Equivalent to --no-discovery.
+  --rpc                    Equivalent to --jsonrpc.
+  --rpcaddr IP             Equivalent to --jsonrpc-interface IP.
+  --rpcport PORT           Equivalent to --jsonrpc-port PORT.
+  --rpcapi APIS            Equivalent to --jsonrpc-apis APIS.
+  --rpccorsdomain URL      Equivalent to --jsonrpc-cors URL.
+  --gasprice WEI           Minimum amount of Wei per GAS to be paid for a
+                           transaction to be accepted for mining. Overrides
+                           --basic-tx-usd.
+  --etherbase ADDRESS      Equivalent to --author ADDRESS.
+  --extradata STRING       Equivalent to --extra-data STRING.
+
+Miscellaneous Options:
+  -l --logging LOGGING     Specify the logging level. Must conform to the same
+                           format as RUST_LOG.
+  -v --version             Show information about version.
+  -h --help                Show this screen.
+"#;
+
+#[derive(Debug, RustcDecodable)]
+pub struct Args {
+	pub cmd_daemon: bool,
+	pub cmd_account: bool,
+	pub cmd_new: bool,
+	pub cmd_list: bool,
+	pub arg_pid_file: String,
+	pub flag_chain: String,
+	pub flag_db_path: String,
+	pub flag_identity: String,
+	pub flag_unlock: Option<String>,
+	pub flag_password: Vec<String>,
+	pub flag_cache: Option<usize>,
+	pub flag_keys_path: String,
+	pub flag_bootnodes: Option<String>,
+	pub flag_network_id: Option<String>,
+	pub flag_pruning: String,
+	pub flag_port: u16,
+	pub flag_peers: usize,
+	pub flag_no_discovery: bool,
+	pub flag_nat: String,
+	pub flag_node_key: Option<String>,
+	pub flag_cache_pref_size: usize,
+	pub flag_cache_max_size: usize,
+	pub flag_queue_max_size: usize,
+	pub flag_jsonrpc: bool,
+	pub flag_jsonrpc_interface: String,
+	pub flag_jsonrpc_port: u16,
+	pub flag_jsonrpc_cors: Option<String>,
+	pub flag_jsonrpc_apis: String,
+	pub flag_webapp: bool,
+	pub flag_webapp_port: u16,
+	pub flag_webapp_interface: String,
+	pub flag_webapp_user: Option<String>,
+	pub flag_webapp_pass: Option<String>,
+	pub flag_force_sealing: bool,
+	pub flag_author: String,
+	pub flag_usd_per_tx: String,
+	pub flag_usd_per_eth: String,
+	pub flag_gas_floor_target: String,
+	pub flag_extra_data: Option<String>,
+	pub flag_tx_limit: usize,
+	pub flag_logging: Option<String>,
+	pub flag_version: bool,
+	// geth-compatibility...
+	pub flag_nodekey: Option<String>,
+	pub flag_nodiscover: bool,
+	pub flag_maxpeers: Option<usize>,
+	pub flag_datadir: Option<String>,
+	pub flag_extradata: Option<String>,
+	pub flag_etherbase: Option<String>,
+	pub flag_gasprice: Option<String>,
+	pub flag_rpc: bool,
+	pub flag_rpcaddr: Option<String>,
+	pub flag_rpcport: Option<u16>,
+	pub flag_rpccorsdomain: Option<String>,
+	pub flag_rpcapi: Option<String>,
+	pub flag_testnet: bool,
+	pub flag_networkid: Option<String>,
+}
+
+pub fn print_version() {
+	println!("\
+Parity
+  version {}
+Copyright 2015, 2016 Ethcore (UK) Limited
+License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
+This is free software: you are free to change and redistribute it.
+There is NO WARRANTY, to the extent permitted by law.
+
+By Wood/Paronyan/Kotewicz/Drwięga/Volf.\
+", version());
+}
+
--- a/parity/configuration.rs
+++ b/parity/configuration.rs
@ -0,0 +1,240 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+use std::env;
+use std::fs::File;
+use std::io::{BufRead, BufReader};
+use std::net::{SocketAddr, IpAddr};
+use std::path::PathBuf;
+use cli::{USAGE, Args};
+use docopt::Docopt;
+
+use die::*;
+use util::*;
+use util::keys::store::AccountService;
+use ethcore::client::{append_path, get_db_path, ClientConfig};
+use ethcore::ethereum;
+use ethcore::spec::Spec;
+use ethsync::SyncConfig;
+use price_info::PriceInfo;
+
+pub struct Configuration {
+	pub args: Args
+}
+
+impl Configuration {
+	pub fn parse() -> Self {
+		Configuration {
+			args: Docopt::new(USAGE).and_then(|d| d.decode()).unwrap_or_else(|e| e.exit()),
+		}
+	}
+
+	pub fn path(&self) -> String {
+		let d = self.args.flag_datadir.as_ref().unwrap_or(&self.args.flag_db_path);
+		d.replace("$HOME", env::home_dir().unwrap().to_str().unwrap())
+	}
+
+	pub fn author(&self) -> Address {
+		let d = self.args.flag_etherbase.as_ref().unwrap_or(&self.args.flag_author);
+		Address::from_str(clean_0x(d)).unwrap_or_else(|_| {
+			die!("{}: Invalid address for --author. Must be 40 hex characters, with or without the 0x at the beginning.", d)
+		})
+	}
+
+	pub fn gas_floor_target(&self) -> U256 {
+		let d = &self.args.flag_gas_floor_target;
+		U256::from_dec_str(d).unwrap_or_else(|_| {
+			die!("{}: Invalid target gas floor given. Must be a decimal unsigned 256-bit number.", d)
+		})
+	}
+
+	pub fn gas_price(&self) -> U256 {
+		match self.args.flag_gasprice.as_ref() {
+			Some(d) => {
+				U256::from_dec_str(d).unwrap_or_else(|_| {
+					die!("{}: Invalid gas price given. Must be a decimal unsigned 256-bit number.", d)
+				})
+			}
+			_ => {
+				let usd_per_tx: f32 = FromStr::from_str(&self.args.flag_usd_per_tx).unwrap_or_else(|_| {
+					die!("{}: Invalid basic transaction price given in USD. Must be a decimal number.", self.args.flag_usd_per_tx)
+				});
+				let usd_per_eth = match self.args.flag_usd_per_eth.as_str() {
+					"etherscan" => PriceInfo::get().map_or_else(|| {
+						die!("Unable to retrieve USD value of ETH from etherscan. Rerun with a different value for --usd-per-eth.")
+					}, |x| x.ethusd),
+					x => FromStr::from_str(x).unwrap_or_else(|_| die!("{}: Invalid ether price given in USD. Must be a decimal number.", x))
+				};
+				let wei_per_usd: f32 = 1.0e18 / usd_per_eth;
+				let gas_per_tx: f32 = 21000.0;
+				let wei_per_gas: f32 = wei_per_usd * usd_per_tx / gas_per_tx;
+				info!("Using a conversion rate of Ξ1 = US${} ({} wei/gas)", usd_per_eth, wei_per_gas);
+				U256::from_dec_str(&format!("{:.0}", wei_per_gas)).unwrap()
+			}
+		}
+	}
+
+	pub fn extra_data(&self) -> Bytes {
+		match self.args.flag_extradata.as_ref().or(self.args.flag_extra_data.as_ref()) {
+			Some(ref x) if x.len() <= 32 => x.as_bytes().to_owned(),
+			None => version_data(),
+			Some(ref x) => { die!("{}: Extra data must be at most 32 characters.", x); }
+		}
+	}
+
+	pub fn keys_path(&self) -> String {
+		self.args.flag_keys_path.replace("$HOME", env::home_dir().unwrap().to_str().unwrap())
+	}
+
+	pub fn spec(&self) -> Spec {
+		if self.args.flag_testnet {
+			return ethereum::new_morden();
+		}
+		match self.args.flag_chain.as_ref() {
+			"frontier" | "homestead" | "mainnet" => ethereum::new_frontier(),
+			"morden" | "testnet" => ethereum::new_morden(),
+			"olympic" => ethereum::new_olympic(),
+			f => Spec::load(contents(f).unwrap_or_else(|_| {
+				die!("{}: Couldn't read chain specification file. Sure it exists?", f)
+			}).as_ref()),
+		}
+	}
+
+	pub fn normalize_enode(e: &str) -> Option<String> {
+		if is_valid_node_url(e) {
+			Some(e.to_owned())
+		} else {
+			None
+		}
+	}
+
+	pub fn init_nodes(&self, spec: &Spec) -> Vec<String> {
+		match self.args.flag_bootnodes {
+			Some(ref x) if !x.is_empty() => x.split(',').map(|s| {
+				Self::normalize_enode(s).unwrap_or_else(|| {
+					die!("{}: Invalid node address format given for a boot node.", s)
+				})
+			}).collect(),
+			Some(_) => Vec::new(),
+			None => spec.nodes().clone(),
+		}
+	}
+
+	pub fn net_addresses(&self) -> (Option<SocketAddr>, Option<SocketAddr>) {
+		let listen_address = Some(SocketAddr::new(IpAddr::from_str("0.0.0.0").unwrap(), self.args.flag_port));
+		let public_address = if self.args.flag_nat.starts_with("extip:") {
+			let host = &self.args.flag_nat[6..];
+			let host = IpAddr::from_str(host).unwrap_or_else(|_| die!("Invalid host given with `--nat extip:{}`", host));
+			Some(SocketAddr::new(host, self.args.flag_port))
+		} else {
+			listen_address
+		};
+		(listen_address, public_address)
+	}
+
+	pub fn net_settings(&self, spec: &Spec) -> NetworkConfiguration {
+		let mut ret = NetworkConfiguration::new();
+		ret.nat_enabled = self.args.flag_nat == "any" || self.args.flag_nat == "upnp";
+		ret.boot_nodes = self.init_nodes(spec);
+		let (listen, public) = self.net_addresses();
+		ret.listen_address = listen;
+		ret.public_address = public;
+		ret.use_secret = self.args.flag_node_key.as_ref().map(|s| Secret::from_str(&s).unwrap_or_else(|_| s.sha3()));
+		ret.discovery_enabled = !self.args.flag_no_discovery && !self.args.flag_nodiscover;
+		ret.ideal_peers = self.args.flag_maxpeers.unwrap_or(self.args.flag_peers) as u32;
+		let mut net_path = PathBuf::from(&self.path());
+		net_path.push("network");
+		ret.config_path = Some(net_path.to_str().unwrap().to_owned());
+		ret
+	}
+
+	pub fn find_best_db(&self, spec: &Spec) -> Option<journaldb::Algorithm> {
+		let mut ret = None;
+		let mut latest_era = None;
+		let jdb_types = [journaldb::Algorithm::Archive, journaldb::Algorithm::EarlyMerge, journaldb::Algorithm::OverlayRecent, journaldb::Algorithm::RefCounted];
+		for i in jdb_types.into_iter() {
+			let db = journaldb::new(&append_path(&get_db_path(&Path::new(&self.path()), *i, spec.genesis_header().hash()), "state"), *i);
+			trace!(target: "parity", "Looking for best DB: {} at {:?}", i, db.latest_era());
+			match (latest_era, db.latest_era()) {
+				(Some(best), Some(this)) if best >= this => {}
+				(_, None) => {}
+				(_, Some(this)) => {
+					latest_era = Some(this);
+					ret = Some(*i);
+				}
+			}
+		}
+		ret
+	}
+
+	pub fn client_config(&self, spec: &Spec) -> ClientConfig {
+		let mut client_config = ClientConfig::default();
+		match self.args.flag_cache {
+			Some(mb) => {
+				client_config.blockchain.max_cache_size = mb * 1024 * 1024;
+				client_config.blockchain.pref_cache_size = client_config.blockchain.max_cache_size * 3 / 4;
+			}
+			None => {
+				client_config.blockchain.pref_cache_size = self.args.flag_cache_pref_size;
+				client_config.blockchain.max_cache_size = self.args.flag_cache_max_size;
+			}
+		}
+		client_config.pruning = match self.args.flag_pruning.as_str() {
+			"archive" => journaldb::Algorithm::Archive,
+			"light" => journaldb::Algorithm::EarlyMerge,
+			"fast" => journaldb::Algorithm::OverlayRecent,
+			"basic" => journaldb::Algorithm::RefCounted,
+			"auto" => self.find_best_db(spec).unwrap_or(journaldb::Algorithm::OverlayRecent),
+			_ => { die!("Invalid pruning method given."); }
+		};
+		trace!(target: "parity", "Using pruning strategy of {}", client_config.pruning);
+		client_config.name = self.args.flag_identity.clone();
+		client_config.queue.max_mem_use = self.args.flag_queue_max_size;
+		client_config
+	}
+
+	pub fn sync_config(&self, spec: &Spec) -> SyncConfig {
+		let mut sync_config = SyncConfig::default();
+		sync_config.network_id = self.args.flag_network_id.as_ref().or(self.args.flag_networkid.as_ref()).map_or(spec.network_id(), |id| {
+			U256::from_str(id).unwrap_or_else(|_| die!("{}: Invalid index given with --network-id/--networkid", id))
+		});
+		sync_config
+	}
+
+	pub fn account_service(&self) -> AccountService {
+		// Secret Store
+		let passwords = self.args.flag_password.iter().flat_map(|filename| {
+			BufReader::new(&File::open(filename).unwrap_or_else(|_| die!("{} Unable to read password file. Ensure it exists and permissions are correct.", filename)))
+				.lines()
+				.map(|l| l.unwrap())
+				.collect::<Vec<_>>()
+				.into_iter()
+		}).collect::<Vec<_>>();
+		let account_service = AccountService::new_in(Path::new(&self.keys_path()));
+		if let Some(ref unlocks) = self.args.flag_unlock {
+			for d in unlocks.split(',') {
+				let a = Address::from_str(clean_0x(&d)).unwrap_or_else(|_| {
+					die!("{}: Invalid address for --unlock. Must be 40 hex characters, without the 0x at the beginning.", d)
+				});
+				if passwords.iter().find(|p| account_service.unlock_account_no_expire(&a, p).is_ok()).is_none() {
+					die!("No password given to unlock account {}. Pass the password using `--password`.", a);
+				}
+			}
+		}
+		account_service
+	}
+}
+
--- a/parity/die.rs
+++ b/parity/die.rs
@ -0,0 +1,54 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+use std;
+use ethcore;
+use util::UtilError;
+use std::process::exit;
+
+#[macro_export]
+macro_rules! die {
+	($($arg:tt)*) => (die_with_message(&format!("{}", format_args!($($arg)*))));
+}
+
+pub fn die_with_error(e: ethcore::error::Error) -> ! {
+	use ethcore::error::Error;
+
+	match e {
+		Error::Util(UtilError::StdIo(e)) => die_with_io_error(e),
+		_ => die!("{:?}", e),
+	}
+}
+
+pub fn die_with_io_error(e: std::io::Error) -> ! {
+	match e.kind() {
+		std::io::ErrorKind::PermissionDenied => {
+			die!("No permissions to bind to specified port.")
+		},
+		std::io::ErrorKind::AddrInUse => {
+			die!("Specified address is already in use. Please make sure that nothing is listening on the same port or try using a different one.")
+		},
+		std::io::ErrorKind::AddrNotAvailable => {
+			die!("Could not use specified interface or given address is invalid.")
+		},
+		_ => die!("{:?}", e),
+	}
+}
+
+pub fn die_with_message(msg: &str) -> ! {
+	println!("ERROR: {}", msg);
+	exit(1);
+}
--- a/parity/informant.rs
+++ b/parity/informant.rs
@ -0,0 +1,89 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+use std::sync::RwLock;
+use std::ops::{Deref, DerefMut};
+use ethsync::{EthSync, SyncProvider};
+use ethcore::client::*;
+use number_prefix::{binary_prefix, Standalone, Prefixed};
+
+pub struct Informant {
+	chain_info: RwLock<Option<BlockChainInfo>>,
+	cache_info: RwLock<Option<BlockChainCacheSize>>,
+	report: RwLock<Option<ClientReport>>,
+}
+
+impl Default for Informant {
+	fn default() -> Self {
+		Informant {
+			chain_info: RwLock::new(None),
+			cache_info: RwLock::new(None),
+			report: RwLock::new(None),
+		}
+	}
+}
+
+impl Informant {
+	fn format_bytes(b: usize) -> String {
+		match binary_prefix(b as f64) {
+			Standalone(bytes)   => format!("{} bytes", bytes),
+			Prefixed(prefix, n) => format!("{:.0} {}B", n, prefix),
+		}
+	}
+
+	pub fn tick(&self, client: &Client, sync: &EthSync) {
+		// 5 seconds betwen calls. TODO: calculate this properly.
+		let dur = 5usize;
+
+		let chain_info = client.chain_info();
+		let queue_info = client.queue_info();
+		let cache_info = client.blockchain_cache_info();
+		let sync_info = sync.status();
+
+		let mut write_report = self.report.write().unwrap();
+		let report = client.report();
+
+		if let (_, _, &Some(ref last_report)) = (
+			self.chain_info.read().unwrap().deref(),
+			self.cache_info.read().unwrap().deref(),
+			write_report.deref()
+		) {
+			println!("[ #{} {} ]---[ {} blk/s | {} tx/s | {} gas/s  //··· {}/{} peers, #{}, {}+{} queued ···// mem: {} db, {} chain, {} queue, {} sync ]",
+				chain_info.best_block_number,
+				chain_info.best_block_hash,
+				(report.blocks_imported - last_report.blocks_imported) / dur,
+				(report.transactions_applied - last_report.transactions_applied) / dur,
+				(report.gas_processed - last_report.gas_processed) / From::from(dur),
+
+				sync_info.num_active_peers,
+				sync_info.num_peers,
+				sync_info.last_imported_block_number.unwrap_or(chain_info.best_block_number),
+				queue_info.unverified_queue_size,
+				queue_info.verified_queue_size,
+
+				Informant::format_bytes(report.state_db_mem),
+				Informant::format_bytes(cache_info.total()),
+				Informant::format_bytes(queue_info.mem_used),
+				Informant::format_bytes(sync_info.mem_used),
+			);
+		}
+
+		*self.chain_info.write().unwrap().deref_mut() = Some(chain_info);
+		*self.cache_info.write().unwrap().deref_mut() = Some(cache_info);
+		*write_report.deref_mut() = Some(report);
+	}
+}
+
--- a/parity/io_handler.rs
+++ b/parity/io_handler.rs
@ -0,0 +1,54 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+use std::sync::Arc;
+use ethcore::client::Client;
+use ethcore::service::NetSyncMessage;
+use ethsync::EthSync;
+use util::keys::store::AccountService;
+use util::{TimerToken, IoHandler, IoContext};
+
+use informant::Informant;
+
+const INFO_TIMER: TimerToken = 0;
+
+const ACCOUNT_TICK_TIMER: TimerToken = 10;
+const ACCOUNT_TICK_MS: u64 = 60000;
+
+pub struct ClientIoHandler {
+	pub client: Arc<Client>,
+	pub sync: Arc<EthSync>,
+	pub accounts: Arc<AccountService>,
+	pub info: Informant,
+}
+
+impl IoHandler<NetSyncMessage> for ClientIoHandler {
+	fn initialize(&self, io: &IoContext<NetSyncMessage>) {
+		io.register_timer(INFO_TIMER, 5000).expect("Error registering timer");
+		io.register_timer(ACCOUNT_TICK_TIMER, ACCOUNT_TICK_MS).expect("Error registering account timer");
+
+	}
+
+	fn timeout(&self, _io: &IoContext<NetSyncMessage>, timer: TimerToken) {
+		match timer {
+			INFO_TIMER => { self.info.tick(&self.client, &self.sync); }
+			ACCOUNT_TICK_TIMER => { self.accounts.tick(); },
+			_ => {}
+		}
+	}
+}
+
+
--- a/parity/main.rs
+++ b/parity/main.rs
--- a/parity/price_info.rs
+++ b/parity/price_info.rs
@ -1,3 +1,19 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
 use rustc_serialize::json::Json;
 use std::io::Read;
 use hyper::Client;
--- a/parity/rpc.rs
+++ b/parity/rpc.rs
@ -0,0 +1,110 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+
+use std::str::FromStr;
+use std::sync::Arc;
+use std::net::SocketAddr;
+use ethcore::client::Client;
+use ethsync::EthSync;
+use ethminer::Miner;
+use util::RotatingLogger;
+use util::keys::store::{AccountService};
+use die::*;
+
+#[cfg(feature = "rpc")]
+pub use ethcore_rpc::Server as RpcServer;
+#[cfg(feature = "rpc")]
+use ethcore_rpc::{RpcServerError, RpcServer as Server};
+#[cfg(not(feature = "rpc"))]
+pub struct RpcServer;
+
+pub struct Configuration {
+	pub enabled: bool,
+	pub interface: String,
+	pub port: u16,
+	pub apis: String,
+	pub cors: Option<String>,
+}
+
+pub struct Dependencies {
+	pub client: Arc<Client>,
+	pub sync: Arc<EthSync>,
+	pub secret_store: Arc<AccountService>,
+	pub miner: Arc<Miner>,
+	pub logger: Arc<RotatingLogger>,
+}
+
+pub fn new(conf: Configuration, deps: Dependencies) -> Option<RpcServer> {
+	if !conf.enabled {
+		return None;
+	}
+
+	let interface = match conf.interface.as_str() {
+		"all" => "0.0.0.0",
+		"local" => "127.0.0.1",
+		x => x,
+	};
+	let apis = conf.apis.split(',').collect();
+	let url = format!("{}:{}", interface, conf.port);
+	let addr = SocketAddr::from_str(&url).unwrap_or_else(|_| die!("{}: Invalid JSONRPC listen host/port given.", url));
+
+	Some(setup_rpc_server(deps, &addr, conf.cors, apis))
+}
+
+#[cfg(not(feature = "rpc"))]
+pub fn setup_rpc_server(
+	_deps: Dependencies,
+	_url: &SocketAddr,
+	_cors_domain: Option<String>,
+	_apis: Vec<&str>,
+) -> ! {
+	die!("Your Parity version has been compiled without JSON-RPC support.")
+}
+
+#[cfg(feature = "rpc")]
+pub fn setup_rpc_server(
+	deps: Dependencies,
+	url: &SocketAddr,
+	cors_domain: Option<String>,
+	apis: Vec<&str>,
+) -> RpcServer {
+	use ethcore_rpc::v1::*;
+
+	let server = Server::new();
+	for api in apis.into_iter() {
+		match api {
+			"web3" => server.add_delegate(Web3Client::new().to_delegate()),
+			"net" => server.add_delegate(NetClient::new(&deps.sync).to_delegate()),
+			"eth" => {
+				server.add_delegate(EthClient::new(&deps.client, &deps.sync, &deps.secret_store, &deps.miner).to_delegate());
+				server.add_delegate(EthFilterClient::new(&deps.client, &deps.miner).to_delegate());
+			},
+			"personal" => server.add_delegate(PersonalClient::new(&deps.secret_store).to_delegate()),
+			"ethcore" => server.add_delegate(EthcoreClient::new(&deps.miner, deps.logger.clone()).to_delegate()),
+			_ => {
+				die!("{}: Invalid API name to be enabled.", api);
+			},
+		}
+	}
+	let start_result = server.start_http(url, cors_domain);
+	match start_result {
+		Err(RpcServerError::IoError(err)) => die_with_io_error(err),
+		Err(e) => die!("{:?}", e),
+		Ok(server) => server,
+	}
+}
+
--- a/parity/setup_log.rs
+++ b/parity/setup_log.rs
@ -0,0 +1,60 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+
+use std::env;
+use std::sync::Arc;
+use time;
+use env_logger::LogBuilder;
+use util::{RotatingLogger};
+
+/// Sets up the logger
+pub fn setup_log(init: &Option<String>) -> Arc<RotatingLogger> {
+	use rlog::*;
+
+	let mut levels = String::new();
+	let mut builder = LogBuilder::new();
+	builder.filter(None, LogLevelFilter::Info);
+
+	if env::var("RUST_LOG").is_ok() {
+		let lvl = &env::var("RUST_LOG").unwrap();
+		levels.push_str(&lvl);
+		levels.push_str(",");
+		builder.parse(lvl);
+	}
+
+	if let Some(ref s) = *init {
+		levels.push_str(s);
+		builder.parse(s);
+	}
+
+	let logs = Arc::new(RotatingLogger::new(levels));
+	let logger = logs.clone();
+	let format = move |record: &LogRecord| {
+		let timestamp = time::strftime("%Y-%m-%d %H:%M:%S %Z", &time::now()).unwrap();
+		let format = if max_log_level() <= LogLevelFilter::Info {
+			format!("{}{}", timestamp, record.args())
+		} else {
+			format!("{}{}:{}: {}", timestamp, record.level(), record.target(), record.args())
+		};
+		logger.append(format.clone());
+		format
+    };
+	builder.format(format);
+	builder.init().unwrap();
+	logs
+}
+
--- a/parity/webapp.rs
+++ b/parity/webapp.rs
@ -0,0 +1,117 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+use std::sync::Arc;
+use std::str::FromStr;
+use std::net::SocketAddr;
+use ethcore::client::Client;
+use ethsync::EthSync;
+use ethminer::Miner;
+use util::RotatingLogger;
+use util::keys::store::{AccountService};
+use die::*;
+
+#[cfg(feature = "webapp")]
+pub use ethcore_webapp::Server as WebappServer;
+#[cfg(not(feature = "webapp"))]
+pub struct WebappServer;
+
+pub struct Configuration {
+	pub enabled: bool,
+	pub interface: String,
+	pub port: u16,
+	pub user: Option<String>,
+	pub pass: Option<String>,
+}
+
+pub struct Dependencies {
+	pub client: Arc<Client>,
+	pub sync: Arc<EthSync>,
+	pub secret_store: Arc<AccountService>,
+	pub miner: Arc<Miner>,
+	pub logger: Arc<RotatingLogger>,
+}
+
+pub fn new(configuration: Configuration, deps: Dependencies) -> Option<WebappServer> {
+	if !configuration.enabled {
+		return None;
+	}
+
+	let interface = match configuration.interface.as_str() {
+		"all" => "0.0.0.0",
+		"local" => "127.0.0.1",
+		x => x,
+	};
+	let url = format!("{}:{}", interface, configuration.port);
+	let addr = SocketAddr::from_str(&url).unwrap_or_else(|_| die!("{}: Invalid Webapps listen host/port given.", url));
+
+	let auth = configuration.user.as_ref().map(|username| {
+		let password = configuration.pass.as_ref().map_or_else(|| {
+			use rpassword::read_password;
+			println!("Type password for WebApps server (user: {}): ", username);
+			let pass = read_password().unwrap();
+			println!("OK, got it. Starting server...");
+			pass
+		}, |pass| pass.to_owned());
+		(username.to_owned(), password)
+	});
+
+	Some(setup_webapp_server(deps, &addr, auth))
+}
+
+#[cfg(not(feature = "webapp"))]
+pub fn setup_webapp_server(
+	_deps: Dependencies,
+	_url: &SocketAddr,
+	_auth: Option<(String, String)>,
+) -> ! {
+	die!("Your Parity version has been compiled without WebApps support.")
+}
+
+#[cfg(feature = "webapp")]
+pub fn setup_webapp_server(
+	deps: Dependencies,
+	url: &SocketAddr,
+	auth: Option<(String, String)>
+) -> WebappServer {
+	use ethcore_rpc::v1::*;
+	use ethcore_webapp as webapp;
+
+	let server = webapp::ServerBuilder::new();
+	server.add_delegate(Web3Client::new().to_delegate());
+	server.add_delegate(NetClient::new(&deps.sync).to_delegate());
+	server.add_delegate(EthClient::new(&deps.client, &deps.sync, &deps.secret_store, &deps.miner).to_delegate());
+	server.add_delegate(EthFilterClient::new(&deps.client, &deps.miner).to_delegate());
+	server.add_delegate(PersonalClient::new(&deps.secret_store).to_delegate());
+	server.add_delegate(EthcoreClient::new(&deps.miner, deps.logger).to_delegate());
+
+	let start_result = match auth {
+		None => {
+			server.start_unsecure_http(url)
+		},
+		Some((username, password)) => {
+			server.start_basic_auth_http(url, &username, &password)
+		},
+	};
+
+	match start_result {
+		Err(webapp::ServerError::IoError(err)) => die_with_io_error(err),
+		Err(e) => die!("{:?}", e),
+		Ok(handle) => handle,
+	}
+
+}
+