Tracedb interface && cli (#997)

* traces cli and jsonrpc api

* missing if in docs

* adding traces to modules

parity/cli.rs

@@ -69,7 +69,7 @@ API and Console Options:
   --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].
+                           [default: web3,eth,net,personal,ethcore,traces].
   -w --webapp              Enable the web applications server (e.g.
                            status page).
   --webapp-port PORT       Specify the port portion of the WebApps server
@@ -103,6 +103,11 @@ Sealing/Mining Options:
                            be included in next block) [default: 1024].
 
 Footprint Options:
+  --tracing BOOL           Indicates if full transaction tracing should be
+                           enabled. Works only if client had been fully synced with
+                           tracing enabled. BOOL may be one of auto, on, off.
+                           auto uses last used value of this option (off if it does
+                           not exist) [default: auto].
   --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.
@@ -164,6 +169,7 @@ pub struct Args {
 	pub flag_bootnodes: Option<String>,
 	pub flag_network_id: Option<String>,
 	pub flag_pruning: String,
+	pub flag_tracing: String,
 	pub flag_port: u16,
 	pub flag_peers: usize,
 	pub flag_no_discovery: bool,

parity/configuration.rs

@@ -26,7 +26,7 @@ use die::*;
 use util::*;
 use util::keys::store::AccountService;
 use util::network_settings::NetworkSettings;
-use ethcore::client::{append_path, get_db_path, ClientConfig};
+use ethcore::client::{append_path, get_db_path, ClientConfig, Switch};
 use ethcore::ethereum;
 use ethcore::spec::Spec;
 use ethsync::SyncConfig;
@@ -207,6 +207,12 @@ impl Configuration {
 				client_config.blockchain.max_cache_size = self.args.flag_cache_max_size;
 			}
 		}
+		client_config.tracing.enabled = match self.args.flag_tracing.as_str() {
+			"auto" => Switch::Auto,
+			"on" => Switch::On,
+			"off" => Switch::Off,
+			_ => { die!("Invalid tracing method given!") }
+		};
 		client_config.pruning = match self.args.flag_pruning.as_str() {
 			"archive" => journaldb::Algorithm::Archive,
 			"light" => journaldb::Algorithm::EarlyMerge,

parity/rpc.rs

@@ -99,7 +99,7 @@ pub fn setup_rpc_server(
 				server.add_delegate(Web3Client::new().to_delegate());
 			},
 			"net" => {
-				modules.insert("web3".to_owned(), "1.0".to_owned());
+				modules.insert("net".to_owned(), "1.0".to_owned());
 				server.add_delegate(NetClient::new(&deps.sync).to_delegate());
 			},
 			"eth" => {
@@ -115,6 +115,10 @@ pub fn setup_rpc_server(
 				// not adding to modules, since `ethcore` is not supported in geth
 				server.add_delegate(EthcoreClient::new(&deps.miner, deps.logger.clone(), deps.settings.clone()).to_delegate())
 			},
+			"traces" => {
+				modules.insert("traces".to_owned(), "1.0".to_owned());
+				server.add_delegate(TracesClient::new(&deps.client).to_delegate())
+			},
 			_ => {
 				die!("{}: Invalid API name to be enabled.", api);
 			},