Add testnet configs and helpers

Author: jflatow

networks/kovan-abi.json

@@ -40,6 +40,7 @@
     "StdComptrollerG2": "0xd026627b0D6326dbA5f3c9ecbca1545dB8CD3486",
     "Base200bps_Slope2000bps_Jump20000bps_Kink90_bad": "0xC0421A129E775680BD22Af5143098075eD6B85d5",
     "Base200bps_Slope2000bps_Jump20000bps_Kink90_bad_2": "0x059965e18ae254954b500f198876bd43afc1ddec",
+    "StdComptrollerG4": "0x35cf8e1f268680db66119dae1bffea136491939a",
     "Comptroller": "0x5eAe89DC1C671724A672ff0630122ee834098657",
     "PriceOracleProxy": "0x37ac0cb24b5DA520B653A5D94cFF26EB08d4Dc02"
   },
@@ -80,7 +81,8 @@
     "cDAI": 18751182,
     "StdComptrollerG2": 18958731,
     "Base200bps_Slope2000bps_Jump20000bps_Kink90_bad": 18746562,
-    "Base200bps_Slope2000bps_Jump20000bps_Kink90_bad_2": 18746562
+    "Base200bps_Slope2000bps_Jump20000bps_Kink90_bad_2": 18746562,
+    "StdComptrollerG4": 19266981
   },
   "PriceOracle": {
     "description": "SimplePriceOracle",
@@ -115,6 +117,11 @@
       "address": "0xd026627b0D6326dbA5f3c9ecbca1545dB8CD3486",
       "contract": "ComptrollerG2",
       "description": "Comptroller Description"
+    },
+    "StdComptrollerG4": {
+      "address": "0x35cf8e1f268680db66119dae1bffea136491939a",
+      "contract": "ComptrollerKovan",
+      "description": "Comptroller Description"
     }
   },
   "Timelock": {
@@ -161,7 +168,8 @@
     "cDAI": "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",
     "StdComptrollerG2": "0x",
     "Base200bps_Slope2000bps_Jump20000bps_Kink90_bad": "0x00000000000000000000000000000000000000000000000000470de4df82000000000000000000000000000000000000000000000000000002c68af0bb1400000000000000000000000000000000000000000000000000001bc16d674ec80000000000000000000000000000000000000000000000000000000000000000005a",
-    "Base200bps_Slope2000bps_Jump20000bps_Kink90_bad_2": "0x00000000000000000000000000000000000000000000000000470de4df82000000000000000000000000000000000000000000000000000002c68af0bb1400000000000000000000000000000000000000000000000000001bc16d674ec80000000000000000000000000000000000000000000000000000000000000000005a"
+    "Base200bps_Slope2000bps_Jump20000bps_Kink90_bad_2": "0x00000000000000000000000000000000000000000000000000470de4df82000000000000000000000000000000000000000000000000000002c68af0bb1400000000000000000000000000000000000000000000000000001bc16d674ec80000000000000000000000000000000000000000000000000000000000000000005a",
+    "StdComptrollerG4": "0x"
   },
   "Tokens": {
     "COMP": {