Add support for Energy Web Foundation's new chains (#10957)

* add(chain-support): new ewf chains support added

- volta test network
- ewc production chain

* remove(tobalaba): ewf chain tobalaba support removal

- tobalaba is deprecated so not officially supported by ewf any more

ethcore/src/spec/chain.rs

@@ -76,7 +76,8 @@ bundle_release_spec! {
 	"ethereum/poasokol" => new_sokol,
 	"ethereum/rinkeby" => new_rinkeby,
 	"ethereum/ropsten" => new_ropsten,
-	"ethereum/tobalaba" => new_tobalaba
+	"ethereum/volta" => new_volta,
+	"ethereum/ewc" => new_ewc
 }
 
 bundle_test_spec! {

parity/cli/mod.rs

@@ -300,7 +300,7 @@ usage! {
 
 			ARG arg_chain: (String) = "foundation", or |c: &Config| c.parity.as_ref()?.chain.clone(),
 			"--chain=[CHAIN]",
-			"Specify the blockchain type. CHAIN may be either a JSON chain specification file or ethereum, classic, poacore, tobalaba, expanse, musicoin, ellaism, mix, callisto, morden, ropsten, kovan, rinkeby, goerli, kotti, poasokol, testnet, or dev.",
+			"Specify the blockchain type. CHAIN may be either a JSON chain specification file or ethereum, classic, poacore, volta, ewc, expanse, musicoin, ellaism, mix, callisto, morden, ropsten, kovan, rinkeby, goerli, kotti, poasokol, testnet, or dev.",
 
 			ARG arg_keys_path: (String) = "$BASE/keys", or |c: &Config| c.parity.as_ref()?.keys_path.clone(),
 			"--keys-path=[PATH]",

parity/params.rs

@@ -34,7 +34,8 @@ pub enum SpecType {
 	Foundation,
 	Classic,
 	Poanet,
-	Tobalaba,
+	Volta,
+	Ewc,
 	Expanse,
 	Musicoin,
 	Ellaism,
@@ -65,7 +66,8 @@ impl str::FromStr for SpecType {
 			"ethereum" | "frontier" | "homestead" | "byzantium" | "foundation" | "mainnet" => SpecType::Foundation,
 			"classic" | "frontier-dogmatic" | "homestead-dogmatic" => SpecType::Classic,
 			"poanet" | "poacore" => SpecType::Poanet,
-			"tobalaba" => SpecType::Tobalaba,
+			"volta" => SpecType::Volta,
+			"ewc" | "energyweb" => SpecType::Ewc,
 			"expanse" => SpecType::Expanse,
 			"musicoin" => SpecType::Musicoin,
 			"ellaism" => SpecType::Ellaism,
@@ -91,7 +93,8 @@ impl fmt::Display for SpecType {
 			SpecType::Foundation => "foundation",
 			SpecType::Classic => "classic",
 			SpecType::Poanet => "poanet",
-			SpecType::Tobalaba => "tobalaba",
+			SpecType::Volta => "volta",
+			SpecType::Ewc => "energyweb",
 			SpecType::Expanse => "expanse",
 			SpecType::Musicoin => "musicoin",
 			SpecType::Ellaism => "ellaism",
@@ -117,7 +120,8 @@ impl SpecType {
 			SpecType::Foundation => Ok(spec::new_foundation(params)),
 			SpecType::Classic => Ok(spec::new_classic(params)),
 			SpecType::Poanet => Ok(spec::new_poanet(params)),
-			SpecType::Tobalaba => Ok(spec::new_tobalaba(params)),
+			SpecType::Volta => Ok(spec::new_volta(params)),
+			SpecType::Ewc => Ok(spec::new_ewc(params)),
 			SpecType::Expanse => Ok(spec::new_expanse(params)),
 			SpecType::Musicoin => Ok(spec::new_musicoin(params)),
 			SpecType::Ellaism => Ok(spec::new_ellaism(params)),
@@ -372,7 +376,9 @@ mod tests {
 		assert_eq!(SpecType::Classic, "homestead-dogmatic".parse().unwrap());
 		assert_eq!(SpecType::Poanet, "poanet".parse().unwrap());
 		assert_eq!(SpecType::Poanet, "poacore".parse().unwrap());
-		assert_eq!(SpecType::Tobalaba, "tobalaba".parse().unwrap());
+		assert_eq!(SpecType::Volta, "volta".parse().unwrap());
+		assert_eq!(SpecType::Ewc, "ewc".parse().unwrap());
+		assert_eq!(SpecType::Ewc, "energyweb".parse().unwrap());
 		assert_eq!(SpecType::Expanse, "expanse".parse().unwrap());
 		assert_eq!(SpecType::Musicoin, "musicoin".parse().unwrap());
 		assert_eq!(SpecType::Ellaism, "ellaism".parse().unwrap());
@@ -401,7 +407,8 @@ mod tests {
 		assert_eq!(format!("{}", SpecType::Foundation), "foundation");
 		assert_eq!(format!("{}", SpecType::Classic), "classic");
 		assert_eq!(format!("{}", SpecType::Poanet), "poanet");
-		assert_eq!(format!("{}", SpecType::Tobalaba), "tobalaba");
+		assert_eq!(format!("{}", SpecType::Volta), "volta");
+		assert_eq!(format!("{}", SpecType::Ewc), "energyweb");
 		assert_eq!(format!("{}", SpecType::Expanse), "expanse");
 		assert_eq!(format!("{}", SpecType::Musicoin), "musicoin");
 		assert_eq!(format!("{}", SpecType::Ellaism), "ellaism");