Dump genesis to JSON file (#218)

* Merge remote-tracking branch 'origin/master' into gav-xts-dont-panic

* Update wasm.

* consensus, session and staking all panic-safe.

* Democracy doesn't panic in apply.

* Fix tests.

* Extra helper macro, council depanicked.

* Fix one test.

* Fix up all council tests. No panics!

* Council voting depanicked.

* Dispatch returns result.

* session & staking tests updated

* Fix democracy tests.

* Fix council tests.

* Fix up polkadot parachains in runtime

* Fix borked merge

* More Slicable support

Support general `Option` and array types.

* Basic storage types.

* Existential deposit for contract creation

* Basic implemnetation along with removals

* Fix tests.

* externalities builder fix.

* Tests.

* Fix up the runtime.

* Fix tests.

* Add generic `Address` type.

* Initial function integration of Address into Extrinsic.

* Fix build

* All tests compile.

* Fix (some) tests.

* Fix signing.

* Push error.

* transfer can accept Address

* Make Address generic over AccountIndex

* Fix test

* Make Council use Address for dispatch.

* Fix build

* Bend over backwards to support braindead derive.

* Repot some files.

* Fix tests.

* Fix grumbles

* Remove Default bound

* Fix build for new nightly.

* Make `apply_extrinsic` never panic, return useful Result.

* More merge hell

* Doesn't build, but might do soon

* Serde woes

* get substrate-runtime-staking compiling

* Polkadot builds again!

* Fix all build.

* Fix tests & binaries.

* Reserve some extra initial byte values of address for future format changes

* Make semantic of `ReservedBalance` clear.

* Fix panic handler.

* Integrate other balance transformations into the new model

Fix up staking tests.

* Fix runtime tests.

* Fix panic build.

* Tests for demonstrating interaction between balance types.

* Repot some runtime code

* Fix checkedblock in non-std builds

* Get rid of `DoLookup` phantom.

* Attempt to make transaction_pool work with lookups.

* Remove vscode settings

* New attempt at making transaction pool work.

* It builds again!

* --all builds

* Fix tests.

* New build.

* Test account nonce reset.

* polkadot transaction pool tests/framework.

* Initial draft (working).

* Address grumbles.

* Revert bad `map_or`

* Rebuild binaries, workaround.

* Avoid checking in vscode

* reconnecting, shared, slog

* CLI options for name and telemetry url

* ensure telemetry url imples enabled

* Avoid casting to usize early.

* Provide on-connect event for session message

* Better port

* heartbeat and some renaming

* transaction pool stuff

* minor renaming.

* report telemetry

* cleanups.

* Fix for previous cleanup

* dump genesis, dev mode, renaming

* Rework chain spec/config &c. to allow for genesis file loading.

* Avoid producing genesis storage when unneeded

* Allow reading JSON genesis state dumps

* tests work again

* better logging.

* Fix wasm build.

* Introduce PoC-1 spec

* Made block message compatible with poc-1

* Squashed changes for dumping genesis block.

* Binaries.

* Made block message compatible with poc-1

* Remove dead code.

* Fix bad merge.

* Argument passing and returning values when invoking sandboxed funcs (#189)

* Fixed block download sequence (#223)

* Trie-based execution proof (#177)

* TrieBasedBackend

* trie tests

* redunant return_value removed

* use Trie::get_with to record trie proofs

* Relaying tx/blocks by light clients (#190)

* do not import external transactions into light tx pool

* do not announce blocks on light clients

* blocks_are_not_announced_by_light_nodes

polkadot/cli/src/lib.rs

@@ -31,13 +31,18 @@ extern crate fdlimit;
 extern crate ed25519;
 extern crate triehash;
 extern crate parking_lot;
+extern crate serde;
+extern crate serde_json;
 
+extern crate substrate_primitives;
 extern crate substrate_state_machine as state_machine;
 extern crate substrate_client as client;
 extern crate substrate_network as network;
 extern crate substrate_rpc;
 extern crate substrate_rpc_servers as rpc;
+extern crate substrate_runtime_primitives as runtime_primitives;
 extern crate polkadot_primitives;
+extern crate polkadot_runtime;
 extern crate polkadot_service as service;
 #[macro_use]
 extern crate slog;	// needed until we can reexport `slog_info` from `substrate_telemetry`
@@ -53,26 +58,40 @@ extern crate clap;
 extern crate error_chain;
 #[macro_use]
 extern crate log;
+#[macro_use]
+extern crate hex_literal;
 
 pub mod error;
 mod informant;
+mod chain_spec;
+mod preset_config;
+
+pub use chain_spec::ChainSpec;
+pub use preset_config::PresetConfig;
 
 use std::io;
+use std::fs::File;
 use std::net::SocketAddr;
 use std::path::{Path, PathBuf};
-use polkadot_primitives::Block;
+use std::collections::HashMap;
+use substrate_primitives::hexdisplay::HexDisplay;
+use substrate_primitives::storage::{StorageData, StorageKey};
 use substrate_telemetry::{init_telemetry, TelemetryConfig};
+use runtime_primitives::StorageMap;
+use polkadot_primitives::Block;
 
 use futures::sync::mpsc;
 use futures::{Sink, Future, Stream};
 use tokio_core::reactor;
-use service::{OptionChainSpec, ChainSpec};
 
 const DEFAULT_TELEMETRY_URL: &str = "wss://telemetry.polkadot.io:443";
 
-struct Configuration(service::Configuration);
+#[derive(Clone)]
+struct SystemConfiguration {
+	chain_name: String,
+}
 
-impl substrate_rpc::system::SystemApi for Configuration {
+impl substrate_rpc::system::SystemApi for SystemConfiguration {
 	fn system_name(&self) -> substrate_rpc::system::error::Result<String> {
 		Ok("parity-polkadot".into())
 	}
@@ -82,14 +101,16 @@ impl substrate_rpc::system::SystemApi for Configuration {
 	}
 
 	fn system_chain(&self) -> substrate_rpc::system::error::Result<String> {
-		Ok(match self.0.chain_spec {
-			ChainSpec::Development => "dev",
-			ChainSpec::LocalTestnet => "local",
-			ChainSpec::PoC2Testnet => "poc-2",
-		}.into())
+		Ok(self.chain_name.clone())
 	}
 }
 
+fn read_storage_json(filename: &str) -> Option<StorageMap> {
+	let file = File::open(PathBuf::from(filename)).ok()?;
+	let h: HashMap<StorageKey, StorageData> = ::serde_json::from_reader(&file).ok()?;
+	Some(h.into_iter().map(|(k, v)| (k.0, v.0)).collect())
+}
+
 /// Parse command line arguments and start the node.
 ///
 /// IANA unassigned port ranges that we could use:
@@ -131,9 +152,16 @@ pub fn run<I, T>(args: I) -> error::Result<()> where
 		info!("Node name: {}", config.name);
 	}
 
+	let chain_spec = matches.value_of("chain")
+		.map(ChainSpec::from)
+		.unwrap_or_else(|| if matches.is_present("dev") { ChainSpec::Development } else { ChainSpec::PoC2Testnet });
+	info!("Chain specification: {}", chain_spec);
+
+	config.chain_name = chain_spec.clone().into();
+
 	let _guard = if matches.is_present("telemetry") || matches.value_of("telemetry-url").is_some() {
 		let name = config.name.clone();
-		let chain = config.chain_spec.clone();
+		let chain_name = config.chain_name.clone();
 		Some(init_telemetry(TelemetryConfig {
 			url: matches.value_of("telemetry-url").unwrap_or(DEFAULT_TELEMETRY_URL).into(),
 			on_connect: Box::new(move || {
@@ -142,7 +170,7 @@ pub fn run<I, T>(args: I) -> error::Result<()> where
 					"implementation" => "parity-polkadot",
 					"version" => crate_version!(),
 					"config" => "",
-					"chain" => <&'static str>::from(chain)
+					"chain" => chain_name.clone(),
 				);
 			}),
 		}))
@@ -162,32 +190,46 @@ pub fn run<I, T>(args: I) -> error::Result<()> where
 
 	config.database_path = db_path(&base_path).to_string_lossy().into();
 
-	let mut role = service::Role::FULL;
-	if matches.is_present("collator") {
-		info!("Starting collator");
-		role = service::Role::COLLATOR;
-	} else if matches.is_present("validator") {
-		info!("Starting validator");
-		role = service::Role::VALIDATOR;
-	} else if matches.is_present("light") {
-		info!("Starting (light)");
-		role = service::Role::LIGHT;
-	} else {
-		info!("Starting (heavy)");
+	let (mut genesis_storage, boot_nodes) = PresetConfig::from_spec(chain_spec)
+		.map(PresetConfig::deconstruct)
+		.unwrap_or_else(|f| (Box::new(move || 
+			read_storage_json(&f)
+				.map(|s| { info!("{} storage items read from {}", s.len(), f); s })
+				.unwrap_or_else(|| panic!("Bad genesis state file: {}", f))
+		), vec![]));
+	
+	if matches.is_present("build-genesis") {
+		info!("Building genesis");
+		for (i, (k, v)) in genesis_storage().iter().enumerate() {
+			print!("{}\n\"0x{}\": \"0x{}\"", if i > 0 {','} else {'{'}, HexDisplay::from(k), HexDisplay::from(v));
+		}
+		println!("\n}}");
+		return Ok(())
 	}
 
-	match matches.value_of("chain") {
-		None => (),
-		Some(n) => config.chain_spec = OptionChainSpec::from(n).inner()
-			.unwrap_or_else(|| panic!("Invalid chain name: {}", n)),
-	}
-	info!("Chain specification: {}", config.chain_spec);
+	config.genesis_storage = genesis_storage;
+
+	let role =
+		if matches.is_present("collator") {
+			info!("Starting collator");
+			service::Role::COLLATOR
+		} else if matches.is_present("light") {
+			info!("Starting (light)");
+			service::Role::LIGHT
+		} else if matches.is_present("validator") || matches.is_present("dev") {
+			info!("Starting validator");
+			service::Role::VALIDATOR
+		} else {
+			info!("Starting (heavy)");
+			service::Role::FULL
+		};
 
 	config.roles = role;
 	{
 		config.network.boot_nodes = matches
 			.values_of("bootnodes")
 			.map_or(Default::default(), |v| v.map(|n| n.to_owned()).collect());
+		config.network.boot_nodes.extend(boot_nodes);
 		config.network.config_path = Some(network_path(&base_path).to_string_lossy().into());
 		config.network.net_config_path = config.network.config_path.clone();
 
@@ -206,14 +248,21 @@ pub fn run<I, T>(args: I) -> error::Result<()> where
 	}
 
 	config.keys = matches.values_of("key").unwrap_or_default().map(str::to_owned).collect();
+	if matches.is_present("dev") {
+		config.keys.push("Alice".into());
+	}
+
+	let sys_conf = SystemConfiguration {
+		chain_name: config.chain_name.clone(),
+	};
 
 	match role == service::Role::LIGHT {
-		true => run_until_exit(core, service::new_light(config.clone())?, &matches, config),
-		false => run_until_exit(core, service::new_full(config.clone())?, &matches, config),
+		true => run_until_exit(core, service::new_light(config)?, &matches, sys_conf),
+		false => run_until_exit(core, service::new_full(config)?, &matches, sys_conf),
 	}
 }
 
-fn run_until_exit<C>(mut core: reactor::Core, service: service::Service<C>, matches: &clap::ArgMatches, config: service::Configuration) -> error::Result<()>
+fn run_until_exit<C>(mut core: reactor::Core, service: service::Service<C>, matches: &clap::ArgMatches, sys_conf: SystemConfiguration) -> error::Result<()>
 	where
 		C: service::Components,
 		client::error::Error: From<<<<C as service::Components>::Backend as client::backend::Backend<Block>>::State as state_machine::Backend>::Error>,
@@ -240,7 +289,7 @@ fn run_until_exit<C>(mut core: reactor::Core, service: service::Service<C>, matc
 				service.client(),
 				chain,
 				service.transaction_pool(),
-				Configuration(config.clone()),
+				sys_conf.clone(),
 			)
 		};
 		(