add a cli flag

parity/cli/config.full.toml

@@ -61,6 +61,7 @@ pass = "test_pass"
 
 [mining]
 author = "0xdeadbeefcafe0000000000000000000000000001"
+consensus_signer = "0xdeadbeefcafe0000000000000000000000000001"
 force_sealing = true
 reseal_on_txs = "all"
 reseal_min_period = 4000

parity/cli/config.toml

@@ -40,6 +40,7 @@ pass = "password"
 
 [mining]
 author = "0xdeadbeefcafe0000000000000000000000000001"
+consensus_signer = "0xdeadbeefcafe0000000000000000000000000001"
 force_sealing = true
 reseal_on_txs = "all"
 reseal_min_period = 4000

parity/cli/mod.rs

@@ -178,6 +178,8 @@ usage! {
 		// -- Sealing/Mining Options
 		flag_author: Option<String> = None,
 			or |c: &Config| otry!(c.mining).author.clone().map(Some),
+		flag_engine_signer: Option<String> = None,
+			or |c: &Config| otry!(c.mining).consensus_signer.clone().map(Some),
 		flag_force_sealing: bool = false,
 			or |c: &Config| otry!(c.mining).force_sealing.clone(),
 		flag_reseal_on_txs: String = "own",
@@ -367,6 +369,7 @@ struct Dapps {
 #[derive(Default, Debug, PartialEq, RustcDecodable)]
 struct Mining {
 	author: Option<String>,
+	consensus_signer: Option<String>,
 	force_sealing: Option<bool>,
 	reseal_on_txs: Option<String>,
 	reseal_min_period: Option<u64>,
@@ -569,6 +572,7 @@ mod tests {
 
 			// -- Sealing/Mining Options
 			flag_author: Some("0xdeadbeefcafe0000000000000000000000000001".into()),
+			flag_engine_signer: Some("0xdeadbeefcafe0000000000000000000000000001".into()),
 			flag_force_sealing: true,
 			flag_reseal_on_txs: "all".into(),
 			flag_reseal_min_period: 4000u64,
@@ -738,6 +742,7 @@ mod tests {
 			}),
 			mining: Some(Mining {
 				author: Some("0xdeadbeefcafe0000000000000000000000000001".into()),
+				consensus_signer: Some("0xdeadbeefcafe0000000000000000000000000001".into()),
 				force_sealing: Some(true),
 				reseal_on_txs: Some("all".into()),
 				reseal_min_period: Some(4000),

parity/cli/usage.txt

@@ -149,6 +149,10 @@ Sealing/Mining Options:
                            for sending block rewards from sealed blocks.
                            NOTE: MINING WILL NOT WORK WITHOUT THIS OPTION.
                            (default: {flag_author:?})
+  --engine-signer ADDRESS  Specify the address which should be used to
+                           sign consensus messages and issue blocks.
+                           Relevant only to non-PoW chains.
+                           (default: {flag_engine_signer:?})
   --force-sealing          Force the node to author new blocks as if it were
                            always sealing/mining.
                            (default: {flag_force_sealing})