[Beta] Aura eip155 validation transition (#5363)

* add eip155 validation

* add transition block

json/src/spec/authority_round.rs

@@ -40,6 +40,12 @@ pub struct AuthorityRoundParams {
 	/// To be used for testing only.
 	#[serde(rename="startStep")]
 	pub start_step: Option<Uint>,
+	/// Block at which score validation should start.
+	#[serde(rename="validateScoreTransition")]
+	pub validate_score_transition: Option<Uint>,
+	/// See main AuthorityRoundParams docs.
+	#[serde(rename="eip155Transition")]
+	pub eip155_transition: Option<Uint>,
 }
 
 /// Authority engine deserialization.
@@ -64,7 +70,8 @@ mod tests {
 					"list" : ["0xc6d9d2cd449a754c494264e1809c50e34d64562b"]
 				},
 				"blockReward": "0x50",
-				"startStep" : 24
+				"startStep" : 24,
+				"eip155Transition": "0x42"
 			}
 		}"#;