V2.5.12 stable (#11336)

* Enable EIP-2384 for ice age hard fork (#11281)
* ethcore/res: activate agharta on classic 9573000 (#11331)
* Istanbul HF in xDai (2019-12-12) (#11299)
* Istanbul HF in POA Core (2019-12-19) (#11298)
* Istanbul HF in POA Sokol (2019-12-05) (#11282)
* Activate ecip-1061 on kotti and mordor (#11338)
* Enable basic verification of local transactions (#11332)
* Disallow EIP-86 style null signatures for transactions outside tests (#11335)

json/src/spec/builtin.rs

@@ -203,6 +203,28 @@ mod tests {
 		]);
 	}
 
+	#[test]
+	fn deserialization_alt_bn128_const_operations() {
+		let s = r#"{
+			"name": "alt_bn128_mul",
+			"pricing": {
+				"100500": {
+					"price": { "alt_bn128_const_operations": { "price": 123 }}
+				}
+			}
+		}"#;
+		let builtin: Builtin = serde_json::from_str::<BuiltinCompat>(s).unwrap().into();
+		assert_eq!(builtin.name, "alt_bn128_mul");
+		assert_eq!(builtin.pricing, map![
+			100500 => PricingAt {
+				info: None,
+				price: Pricing::AltBn128ConstOperations(AltBn128ConstOperations { 
+					price: 123,
+				}),
+			}
+		]);
+	}
+
 	#[test]
 	fn activate_at() {
 		let s = r#"{