diff --git a/abis/BlockReward_abi.json b/abis/BlockReward_abi.json
index db92f6a..d1ba8dd 100644
--- a/abis/BlockReward_abi.json
+++ b/abis/BlockReward_abi.json
@@ -1,78 +1,99 @@
 [
   {
-    "constant": true,
-    "inputs": [],
-    "name": "DECIMALS",
-    "outputs": [
+    "anonymous": false,
+    "inputs": [
       {
-        "name": "",
+        "indexed": false,
+        "internalType": "address[]",
+        "name": "receivers",
+        "type": "address[]"
+      },
+      {
+        "indexed": false,
+        "internalType": "uint256[]",
+        "name": "rewards",
+        "type": "uint256[]"
+      }
+    ],
+    "name": "Rewarded",
+    "type": "event"
+  },
+  {
+    "anonymous": false,
+    "inputs": [
+      {
+        "indexed": false,
+        "internalType": "uint256",
+        "name": "amount",
         "type": "uint256"
       }
     ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
+    "name": "RewardedOnCycle",
+    "type": "event"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "isInitialized",
+    "name": "BLOCKS_PER_YEAR",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
-        "type": "bool"
+        "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "getRewardedOnCycle",
+    "name": "DECIMALS",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "shouldEmitRewardedOnCycle",
+    "name": "INFLATION",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
-        "type": "bool"
+        "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
+    "inputs": [],
+    "name": "emitRewardedOnCycle",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
     "inputs": [],
     "name": "getBlockRewardAmount",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
+        "internalType": "address",
         "name": "_validator",
         "type": "address"
       }
@@ -80,124 +101,121 @@
     "name": "getBlockRewardAmountPerValidator",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "INFLATION",
+    "name": "getBlocksPerYear",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
-    "stateMutability": "view",
+    "stateMutability": "pure",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "getBlocksPerYear",
+    "name": "getInflation",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
-    "stateMutability": "view",
+    "stateMutability": "pure",
     "type": "function"
   },
   {
-    "constant": false,
     "inputs": [],
-    "name": "onCycleEnd",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
+    "name": "getProxyStorage",
+    "outputs": [
+      {
+        "internalType": "address",
+        "name": "",
+        "type": "address"
+      }
+    ],
+    "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "getTotalSupply",
+    "name": "getRewardedOnCycle",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "BLOCKS_PER_YEAR",
+    "name": "getTotalSupply",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": false,
-    "inputs": [],
-    "name": "emitRewardedOnCycle",
+    "inputs": [
+      {
+        "internalType": "uint256",
+        "name": "_supply",
+        "type": "uint256"
+      }
+    ],
+    "name": "initialize",
     "outputs": [],
-    "payable": false,
     "stateMutability": "nonpayable",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "getInflation",
+    "name": "isInitialized",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
-        "type": "uint256"
+        "type": "bool"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "getProxyStorage",
-    "outputs": [
-      {
-        "name": "",
-        "type": "address"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "view",
+    "name": "onCycleEnd",
+    "outputs": [],
+    "stateMutability": "nonpayable",
     "type": "function"
   },
   {
-    "constant": false,
     "inputs": [
       {
+        "internalType": "address[]",
         "name": "benefactors",
         "type": "address[]"
       },
       {
+        "internalType": "uint16[]",
         "name": "kind",
         "type": "uint16[]"
       }
@@ -205,59 +223,30 @@
     "name": "reward",
     "outputs": [
       {
+        "internalType": "address[]",
         "name": "",
         "type": "address[]"
       },
       {
+        "internalType": "uint256[]",
         "name": "",
         "type": "uint256[]"
       }
     ],
-    "payable": false,
     "stateMutability": "nonpayable",
     "type": "function"
   },
   {
-    "constant": false,
-    "inputs": [
+    "inputs": [],
+    "name": "shouldEmitRewardedOnCycle",
+    "outputs": [
       {
-        "name": "_supply",
-        "type": "uint256"
+        "internalType": "bool",
+        "name": "",
+        "type": "bool"
       }
     ],
-    "name": "initialize",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
+    "stateMutability": "view",
     "type": "function"
-  },
-  {
-    "anonymous": false,
-    "inputs": [
-      {
-        "indexed": false,
-        "name": "receivers",
-        "type": "address[]"
-      },
-      {
-        "indexed": false,
-        "name": "rewards",
-        "type": "uint256[]"
-      }
-    ],
-    "name": "Rewarded",
-    "type": "event"
-  },
-  {
-    "anonymous": false,
-    "inputs": [
-      {
-        "indexed": false,
-        "name": "amount",
-        "type": "uint256"
-      }
-    ],
-    "name": "RewardedOnCycle",
-    "type": "event"
   }
-]
\ No newline at end of file
+]
diff --git a/abis/Consensus_abi.json b/abis/Consensus_abi.json
index 719c831..36f699f 100644
--- a/abis/Consensus_abi.json
+++ b/abis/Consensus_abi.json
@@ -1,279 +1,294 @@
 [
   {
-    "constant": true,
-    "inputs": [],
-    "name": "getLastSnapshotTakenAtBlock",
-    "outputs": [
+    "anonymous": false,
+    "inputs": [
       {
-        "name": "",
-        "type": "uint256"
+        "indexed": false,
+        "internalType": "address[]",
+        "name": "newSet",
+        "type": "address[]"
       }
     ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
+    "name": "ChangeFinalized",
+    "type": "event"
   },
   {
-    "constant": true,
-    "inputs": [],
-    "name": "jailedValidatorsLength",
-    "outputs": [
+    "anonymous": false,
+    "inputs": [
       {
-        "name": "",
-        "type": "uint256"
+        "indexed": true,
+        "internalType": "bytes32",
+        "name": "parentHash",
+        "type": "bytes32"
+      },
+      {
+        "indexed": false,
+        "internalType": "address[]",
+        "name": "newSet",
+        "type": "address[]"
       }
     ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
+    "name": "InitiateChange",
+    "type": "event"
   },
   {
-    "constant": true,
+    "anonymous": false,
     "inputs": [
       {
-        "name": "_p",
+        "indexed": false,
+        "internalType": "uint256",
+        "name": "requiredVersion",
         "type": "uint256"
-      }
-    ],
-    "name": "pendingValidatorsAtPosition",
-    "outputs": [
+      },
       {
-        "name": "",
-        "type": "address"
+        "indexed": false,
+        "internalType": "uint256",
+        "name": "upgradedCount",
+        "type": "uint256"
+      },
+      {
+        "indexed": false,
+        "internalType": "uint256",
+        "name": "totalCount",
+        "type": "uint256"
+      },
+      {
+        "indexed": false,
+        "internalType": "bool",
+        "name": "quorumReached",
+        "type": "bool"
       }
     ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
+    "name": "NodeVersionCheckExecuted",
+    "type": "event"
   },
   {
-    "constant": true,
+    "anonymous": false,
     "inputs": [
       {
-        "name": "_snapshotId",
-        "type": "uint256"
-      }
-    ],
-    "name": "getSnapshotAddresses",
-    "outputs": [
+        "indexed": true,
+        "internalType": "address",
+        "name": "validator",
+        "type": "address"
+      },
       {
-        "name": "",
-        "type": "address[]"
+        "indexed": false,
+        "internalType": "uint256",
+        "name": "version",
+        "type": "uint256"
       }
     ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
+    "name": "NodeVersionReported",
+    "type": "event"
   },
   {
-    "constant": false,
+    "anonymous": false,
     "inputs": [
       {
-        "name": "_newAddress",
-        "type": "address"
+        "indexed": false,
+        "internalType": "uint256",
+        "name": "version",
+        "type": "uint256"
+      },
+      {
+        "indexed": false,
+        "internalType": "uint256",
+        "name": "activationBlock",
+        "type": "uint256"
       }
     ],
-    "name": "setProxyStorage",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
+    "name": "RequiredNodeVersionSet",
+    "type": "event"
   },
   {
-    "constant": true,
+    "anonymous": false,
     "inputs": [],
-    "name": "getMinValidatorFee",
+    "name": "ShouldEmitInitiateChange",
+    "type": "event"
+  },
+  {
+    "stateMutability": "payable",
+    "type": "fallback"
+  },
+  {
+    "inputs": [],
+    "name": "CYCLE_DURATION_BLOCKS",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [
-      {
-        "name": "_address",
-        "type": "address"
-      }
-    ],
-    "name": "isJailed",
+    "inputs": [],
+    "name": "DECIMALS",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
-        "type": "bool"
+        "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [
-      {
-        "name": "_address",
-        "type": "address"
-      },
-      {
-        "name": "_validator",
-        "type": "address"
-      }
-    ],
-    "name": "delegatedAmount",
+    "inputs": [],
+    "name": "DEFAULT_VALIDATOR_FEE",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "SNAPSHOTS_PER_CYCLE",
+    "name": "MAX_STAKE",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "pendingValidatorsLength",
+    "name": "MAX_STRIKE_COUNT",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "newValidatorSetLength",
+    "name": "MAX_VALIDATORS",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "DECIMALS",
+    "name": "MIN_STAKE",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": false,
-    "inputs": [
+    "inputs": [],
+    "name": "SNAPSHOTS_PER_CYCLE",
+    "outputs": [
       {
-        "name": "_amount",
+        "internalType": "uint256",
+        "name": "",
         "type": "uint256"
       }
     ],
-    "name": "withdraw",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
+    "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "isInitialized",
+    "name": "STRIKE_RESET",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
-        "type": "bool"
+        "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": false,
     "inputs": [],
-    "name": "stake",
-    "outputs": [],
-    "payable": true,
-    "stateMutability": "payable",
+    "name": "UPGRADE_QUORUM_BP",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "currentValidatorsLength",
+    "name": "VALIDATOR_PRODUCTIVITY_BP",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": false,
     "inputs": [
       {
-        "name": "_amount",
+        "internalType": "address",
+        "name": "_validator",
+        "type": "address"
+      }
+    ],
+    "name": "blockCounter",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "",
         "type": "uint256"
       }
     ],
-    "name": "setValidatorFee",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
+    "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "getMinStake",
+    "name": "currentValidators",
     "outputs": [
       {
+        "internalType": "address[]",
         "name": "",
-        "type": "uint256"
+        "type": "address[]"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
+        "internalType": "uint256",
         "name": "_p",
         "type": "uint256"
       }
@@ -281,404 +296,481 @@
     "name": "currentValidatorsAtPosition",
     "outputs": [
       {
+        "internalType": "address",
         "name": "",
         "type": "address"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": false,
+    "inputs": [],
+    "name": "currentValidatorsLength",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
     "inputs": [
       {
+        "internalType": "address",
+        "name": "_validator",
+        "type": "address"
+      }
+    ],
+    "name": "cycle",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "inputs": [
+      {
+        "internalType": "address",
         "name": "_validator",
         "type": "address"
       }
     ],
     "name": "delegate",
     "outputs": [],
-    "payable": true,
     "stateMutability": "payable",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [],
-    "name": "newValidatorSet",
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "_address",
+        "type": "address"
+      },
+      {
+        "internalType": "address",
+        "name": "_validator",
+        "type": "address"
+      }
+    ],
+    "name": "delegatedAmount",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
-        "type": "address[]"
+        "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [],
-    "name": "jailedValidators",
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "_validator",
+        "type": "address"
+      }
+    ],
+    "name": "delegators",
     "outputs": [
       {
+        "internalType": "address[]",
         "name": "",
         "type": "address[]"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
+        "internalType": "address",
         "name": "_validator",
         "type": "address"
       },
       {
-        "name": "_rewardAmount",
+        "internalType": "uint256",
+        "name": "_p",
         "type": "uint256"
       }
     ],
-    "name": "getDelegatorsForRewardDistribution",
+    "name": "delegatorsAtPosition",
     "outputs": [
       {
+        "internalType": "address",
         "name": "",
-        "type": "address[]"
-      },
-      {
-        "name": "",
-        "type": "uint256[]"
+        "type": "address"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [],
-    "name": "STRIKE_RESET",
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "_validator",
+        "type": "address"
+      }
+    ],
+    "name": "delegatorsLength",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": false,
     "inputs": [],
-    "name": "maintenance",
+    "name": "emitInitiateChange",
     "outputs": [],
-    "payable": false,
     "stateMutability": "nonpayable",
     "type": "function"
   },
   {
-    "constant": false,
     "inputs": [],
-    "name": "unJail",
+    "name": "finalizeChange",
     "outputs": [],
-    "payable": false,
     "stateMutability": "nonpayable",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "MAX_VALIDATORS",
+    "name": "getCurrentCycleEndBlock",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "VALIDATOR_PRODUCTIVITY_BP",
+    "name": "getCurrentCycleStartBlock",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": false,
     "inputs": [],
-    "name": "finalizeChange",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
+    "name": "getCycleDurationBlocks",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "stateMutability": "pure",
+    "type": "function"
+  },
+  {
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "_validator",
+        "type": "address"
+      },
+      {
+        "internalType": "uint256",
+        "name": "_rewardAmount",
+        "type": "uint256"
+      }
+    ],
+    "name": "getDelegatorsForRewardDistribution",
+    "outputs": [
+      {
+        "internalType": "address[]",
+        "name": "",
+        "type": "address[]"
+      },
+      {
+        "internalType": "uint256[]",
+        "name": "",
+        "type": "uint256[]"
+      }
+    ],
+    "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "getMaxValidators",
+    "name": "getLastSnapshotTakenAtBlock",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [
+    "inputs": [],
+    "name": "getMaxStake",
+    "outputs": [
       {
-        "name": "_validator",
-        "type": "address"
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
       }
     ],
-    "name": "getStrikes",
+    "stateMutability": "pure",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "getMaxValidators",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
-    "stateMutability": "view",
+    "stateMutability": "pure",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [
+    "inputs": [],
+    "name": "getMinStake",
+    "outputs": [
       {
-        "name": "_validator",
-        "type": "address"
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
       }
     ],
-    "name": "blockCounter",
+    "stateMutability": "pure",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "getMinValidatorFee",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
-    "stateMutability": "view",
+    "stateMutability": "pure",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "CYCLE_DURATION_BLOCKS",
+    "name": "getNextSnapshotId",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": false,
     "inputs": [
       {
+        "internalType": "address",
         "name": "_validator",
         "type": "address"
       }
     ],
-    "name": "cycle",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [],
-    "name": "MAX_STRIKE_COUNT",
+    "name": "getNodeVersion",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "getSnapshotsPerCycle",
+    "name": "getNodeVersionActivationBlock",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "requiredSignatures",
+    "name": "getProxyStorage",
     "outputs": [
       {
+        "internalType": "address",
         "name": "",
-        "type": "uint256"
+        "type": "address"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
+        "internalType": "address",
         "name": "_validator",
         "type": "address"
       }
     ],
-    "name": "delegators",
+    "name": "getReleaseBlock",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
-        "type": "address[]"
+        "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "isFinalized",
+    "name": "getRequiredNodeVersion",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
-        "type": "bool"
+        "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
-        "name": "_p",
+        "internalType": "uint256",
+        "name": "_snapshotId",
         "type": "uint256"
       }
     ],
-    "name": "jailedValidatorsAtPosition",
+    "name": "getSnapshotAddresses",
     "outputs": [
       {
+        "internalType": "address[]",
         "name": "",
-        "type": "address"
+        "type": "address[]"
+      }
+    ],
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "getSnapshotsPerCycle",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
       }
     ],
-    "payable": false,
-    "stateMutability": "view",
+    "stateMutability": "pure",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [],
-    "name": "DEFAULT_VALIDATOR_FEE",
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "_validator",
+        "type": "address"
+      }
+    ],
+    "name": "getStrikeReset",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [],
-    "name": "getCurrentCycleStartBlock",
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "_validator",
+        "type": "address"
+      }
+    ],
+    "name": "getStrikes",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": false,
-    "inputs": [],
-    "name": "emitInitiateChange",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "constant": true,
     "inputs": [],
-    "name": "totalStakeAmount",
+    "name": "getValidators",
     "outputs": [
       {
+        "internalType": "address[]",
         "name": "",
-        "type": "uint256"
+        "type": "address[]"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
-        "name": "_validator",
+        "internalType": "address",
+        "name": "_initialValidator",
         "type": "address"
       }
     ],
-    "name": "validatorFee",
-    "outputs": [
-      {
-        "name": "",
-        "type": "uint256"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "view",
+    "name": "initialize",
+    "outputs": [],
+    "stateMutability": "nonpayable",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
+        "internalType": "address",
         "name": "_validator",
         "type": "address"
       },
       {
+        "internalType": "address",
         "name": "_address",
         "type": "address"
       }
@@ -686,375 +778,414 @@
     "name": "isDelegator",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
         "type": "bool"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "currentValidators",
+    "name": "isFinalized",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
-        "type": "address[]"
+        "type": "bool"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "getCycleDurationBlocks",
+    "name": "isInitialized",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
-        "type": "uint256"
+        "type": "bool"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [],
-    "name": "pendingValidators",
-    "outputs": [
+    "inputs": [
       {
-        "name": "",
-        "type": "address[]"
+        "internalType": "address",
+        "name": "_address",
+        "type": "address"
       }
     ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [],
-    "name": "getCurrentCycleEndBlock",
+    "name": "isJailed",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
-        "type": "uint256"
+        "type": "bool"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "getValidators",
+    "name": "isNodeVersionCheckExecuted",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
-        "type": "address[]"
+        "type": "bool"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
+        "internalType": "address",
         "name": "_address",
         "type": "address"
       }
     ],
-    "name": "stakeAmount",
+    "name": "isPendingValidator",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
-        "type": "uint256"
+        "type": "bool"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": false,
     "inputs": [
       {
-        "name": "_initialValidator",
+        "internalType": "address",
+        "name": "_address",
         "type": "address"
       }
     ],
-    "name": "initialize",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [],
-    "name": "MAX_STAKE",
+    "name": "isValidator",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
-        "type": "uint256"
+        "type": "bool"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "MIN_STAKE",
+    "name": "jailedValidators",
     "outputs": [
       {
+        "internalType": "address[]",
         "name": "",
-        "type": "uint256"
+        "type": "address[]"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
-        "name": "_validator",
+        "internalType": "uint256",
+        "name": "_p",
+        "type": "uint256"
+      }
+    ],
+    "name": "jailedValidatorsAtPosition",
+    "outputs": [
+      {
+        "internalType": "address",
+        "name": "",
         "type": "address"
       }
     ],
-    "name": "getStrikeReset",
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "jailedValidatorsLength",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [
+    "inputs": [],
+    "name": "maintenance",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "newValidatorSet",
+    "outputs": [
       {
-        "name": "_validator",
-        "type": "address"
+        "internalType": "address[]",
+        "name": "",
+        "type": "address[]"
       }
     ],
-    "name": "delegatorsLength",
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "newValidatorSetLength",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "getNextSnapshotId",
+    "name": "pendingValidators",
     "outputs": [
       {
+        "internalType": "address[]",
         "name": "",
-        "type": "uint256"
+        "type": "address[]"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
-        "name": "_validator",
-        "type": "address"
-      },
-      {
+        "internalType": "uint256",
         "name": "_p",
         "type": "uint256"
       }
     ],
-    "name": "delegatorsAtPosition",
+    "name": "pendingValidatorsAtPosition",
     "outputs": [
       {
+        "internalType": "address",
         "name": "",
         "type": "address"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "getProxyStorage",
+    "name": "pendingValidatorsLength",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
-        "type": "address"
+        "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
-        "name": "_validator",
-        "type": "address"
+        "internalType": "uint256",
+        "name": "_version",
+        "type": "uint256"
       }
     ],
-    "name": "getReleaseBlock",
+    "name": "reportNodeVersion",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "requiredSignatures",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [],
-    "name": "shouldEmitInitiateChange",
-    "outputs": [
+    "inputs": [
       {
-        "name": "",
-        "type": "bool"
+        "internalType": "address",
+        "name": "_newAddress",
+        "type": "address"
       }
     ],
-    "payable": false,
-    "stateMutability": "view",
+    "name": "setProxyStorage",
+    "outputs": [],
+    "stateMutability": "nonpayable",
     "type": "function"
   },
   {
-    "constant": false,
     "inputs": [
       {
-        "name": "_validator",
-        "type": "address"
+        "internalType": "uint256",
+        "name": "_version",
+        "type": "uint256"
       },
       {
-        "name": "_amount",
+        "internalType": "uint256",
+        "name": "_activationBlock",
         "type": "uint256"
       }
     ],
-    "name": "withdraw",
+    "name": "setRequiredNodeVersion",
     "outputs": [],
-    "payable": false,
     "stateMutability": "nonpayable",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
-        "name": "_address",
-        "type": "address"
+        "internalType": "uint256",
+        "name": "_amount",
+        "type": "uint256"
       }
     ],
-    "name": "isValidator",
+    "name": "setValidatorFee",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "shouldEmitInitiateChange",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
         "type": "bool"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
+    "inputs": [],
+    "name": "stake",
+    "outputs": [],
+    "stateMutability": "payable",
+    "type": "function"
+  },
+  {
     "inputs": [
       {
+        "internalType": "address",
         "name": "_address",
         "type": "address"
       }
     ],
-    "name": "isPendingValidator",
+    "name": "stakeAmount",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
-        "type": "bool"
+        "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "getMaxStake",
+    "name": "totalStakeAmount",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "payable": true,
-    "stateMutability": "payable",
-    "type": "fallback"
+    "inputs": [],
+    "name": "unJail",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
   },
   {
-    "anonymous": false,
     "inputs": [
       {
-        "indexed": false,
-        "name": "newSet",
-        "type": "address[]"
+        "internalType": "address",
+        "name": "_validator",
+        "type": "address"
       }
     ],
-    "name": "ChangeFinalized",
-    "type": "event"
+    "name": "validatorFee",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "stateMutability": "view",
+    "type": "function"
   },
   {
-    "anonymous": false,
-    "inputs": [],
-    "name": "ShouldEmitInitiateChange",
-    "type": "event"
+    "inputs": [
+      {
+        "internalType": "uint256",
+        "name": "_amount",
+        "type": "uint256"
+      }
+    ],
+    "name": "withdraw",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
   },
   {
-    "anonymous": false,
     "inputs": [
       {
-        "indexed": true,
-        "name": "parentHash",
-        "type": "bytes32"
+        "internalType": "address",
+        "name": "_validator",
+        "type": "address"
       },
       {
-        "indexed": false,
-        "name": "newSet",
-        "type": "address[]"
+        "internalType": "uint256",
+        "name": "_amount",
+        "type": "uint256"
       }
     ],
-    "name": "InitiateChange",
-    "type": "event"
+    "name": "withdraw",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "stateMutability": "payable",
+    "type": "receive"
   }
-]
\ No newline at end of file
+]
diff --git a/abis/EternalStorageProxy_abi.json b/abis/EternalStorageProxy_abi.json
index 919894e..9352997 100644
--- a/abis/EternalStorageProxy_abi.json
+++ b/abis/EternalStorageProxy_abi.json
@@ -1,60 +1,26 @@
 [
-  {
-    "constant": true,
-    "inputs": [],
-    "name": "isInitialized",
-    "outputs": [
-      {
-        "name": "",
-        "type": "bool"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
   {
     "inputs": [
       {
+        "internalType": "address",
         "name": "_proxyStorage",
         "type": "address"
       },
       {
+        "internalType": "address",
         "name": "_implementation",
         "type": "address"
       }
     ],
-    "payable": false,
     "stateMutability": "nonpayable",
     "type": "constructor"
   },
-  {
-    "payable": true,
-    "stateMutability": "payable",
-    "type": "fallback"
-  },
-  {
-    "anonymous": false,
-    "inputs": [
-      {
-        "indexed": false,
-        "name": "version",
-        "type": "uint256"
-      },
-      {
-        "indexed": true,
-        "name": "implementation",
-        "type": "address"
-      }
-    ],
-    "name": "Upgraded",
-    "type": "event"
-  },
   {
     "anonymous": false,
     "inputs": [
       {
         "indexed": true,
+        "internalType": "address",
         "name": "previousOwner",
         "type": "address"
       }
@@ -67,11 +33,13 @@
     "inputs": [
       {
         "indexed": true,
+        "internalType": "address",
         "name": "previousOwner",
         "type": "address"
       },
       {
         "indexed": true,
+        "internalType": "address",
         "name": "newOwner",
         "type": "address"
       }
@@ -80,101 +48,134 @@
     "type": "event"
   },
   {
-    "constant": false,
+    "anonymous": false,
     "inputs": [
       {
-        "name": "_newImplementation",
+        "indexed": false,
+        "internalType": "uint256",
+        "name": "version",
+        "type": "uint256"
+      },
+      {
+        "indexed": true,
+        "internalType": "address",
+        "name": "implementation",
         "type": "address"
       }
     ],
-    "name": "upgradeTo",
+    "name": "Upgraded",
+    "type": "event"
+  },
+  {
+    "stateMutability": "payable",
+    "type": "fallback"
+  },
+  {
+    "inputs": [],
+    "name": "getImplementation",
     "outputs": [
       {
+        "internalType": "address",
         "name": "",
-        "type": "bool"
+        "type": "address"
       }
     ],
-    "payable": false,
-    "stateMutability": "nonpayable",
+    "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": false,
     "inputs": [],
-    "name": "renounceOwnership",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "constant": false,
-    "inputs": [
+    "name": "getOwner",
+    "outputs": [
       {
-        "name": "_newOwner",
+        "internalType": "address",
+        "name": "",
         "type": "address"
       }
     ],
-    "name": "transferOwnership",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
+    "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "getOwner",
+    "name": "getProxyStorage",
     "outputs": [
       {
+        "internalType": "address",
         "name": "",
         "type": "address"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
     "name": "getVersion",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "getImplementation",
+    "name": "isInitialized",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
-        "type": "address"
+        "type": "bool"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "getProxyStorage",
+    "name": "renounceOwnership",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "_newOwner",
+        "type": "address"
+      }
+    ],
+    "name": "transferOwnership",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "_newImplementation",
+        "type": "address"
+      }
+    ],
+    "name": "upgradeTo",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
-        "type": "address"
+        "type": "bool"
       }
     ],
-    "payable": false,
-    "stateMutability": "view",
+    "stateMutability": "nonpayable",
     "type": "function"
+  },
+  {
+    "stateMutability": "payable",
+    "type": "receive"
   }
 ]
diff --git a/abis/ProxyStorage_abi.json b/abis/ProxyStorage_abi.json
index 1a3619e..15f3b05 100644
--- a/abis/ProxyStorage_abi.json
+++ b/abis/ProxyStorage_abi.json
@@ -1,33 +1,41 @@
 [
   {
-    "constant": true,
-    "inputs": [],
-    "name": "isInitialized",
-    "outputs": [
+    "anonymous": false,
+    "inputs": [
       {
-        "name": "",
-        "type": "bool"
+        "indexed": false,
+        "internalType": "uint256",
+        "name": "contractType",
+        "type": "uint256"
+      },
+      {
+        "indexed": false,
+        "internalType": "address",
+        "name": "contractAddress",
+        "type": "address"
       }
     ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
+    "name": "AddressSet",
+    "type": "event"
   },
   {
     "anonymous": false,
     "inputs": [
       {
         "indexed": false,
+        "internalType": "address",
         "name": "consensus",
         "type": "address"
       },
       {
         "indexed": false,
+        "internalType": "address",
         "name": "blockReward",
         "type": "address"
       },
       {
         "indexed": false,
+        "internalType": "address",
         "name": "voting",
         "type": "address"
       }
@@ -36,81 +44,92 @@
     "type": "event"
   },
   {
-    "anonymous": false,
-    "inputs": [
+    "inputs": [],
+    "name": "getBlockReward",
+    "outputs": [
       {
-        "indexed": false,
-        "name": "contractType",
-        "type": "uint256"
-      },
+        "internalType": "address",
+        "name": "",
+        "type": "address"
+      }
+    ],
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "getConsensus",
+    "outputs": [
       {
-        "indexed": false,
-        "name": "contractAddress",
+        "internalType": "address",
+        "name": "",
         "type": "address"
       }
     ],
-    "name": "AddressSet",
-    "type": "event"
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "getVoting",
+    "outputs": [
+      {
+        "internalType": "address",
+        "name": "",
+        "type": "address"
+      }
+    ],
+    "stateMutability": "view",
+    "type": "function"
   },
   {
-    "constant": false,
     "inputs": [
       {
+        "internalType": "address",
         "name": "_consensus",
         "type": "address"
       }
     ],
     "name": "initialize",
     "outputs": [],
-    "payable": false,
     "stateMutability": "nonpayable",
     "type": "function"
   },
   {
-    "constant": false,
     "inputs": [
       {
+        "internalType": "address",
         "name": "_blockReward",
         "type": "address"
       },
       {
+        "internalType": "address",
         "name": "_voting",
         "type": "address"
       }
     ],
     "name": "initializeAddresses",
     "outputs": [],
-    "payable": false,
     "stateMutability": "nonpayable",
     "type": "function"
   },
   {
-    "constant": false,
-    "inputs": [
-      {
-        "name": "_contractType",
-        "type": "uint256"
-      },
-      {
-        "name": "_contractAddress",
-        "type": "address"
-      }
-    ],
-    "name": "setContractAddress",
+    "inputs": [],
+    "name": "isInitialized",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
         "type": "bool"
       }
     ],
-    "payable": false,
-    "stateMutability": "nonpayable",
+    "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
+        "internalType": "uint256",
         "name": "_contractType",
         "type": "uint256"
       }
@@ -118,54 +137,36 @@
     "name": "isValidContractType",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
         "type": "bool"
       }
     ],
-    "payable": false,
     "stateMutability": "pure",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [],
-    "name": "getConsensus",
-    "outputs": [
+    "inputs": [
       {
-        "name": "",
-        "type": "address"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [],
-    "name": "getBlockReward",
-    "outputs": [
+        "internalType": "uint256",
+        "name": "_contractType",
+        "type": "uint256"
+      },
       {
-        "name": "",
+        "internalType": "address",
+        "name": "_contractAddress",
         "type": "address"
       }
     ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [],
-    "name": "getVoting",
+    "name": "setContractAddress",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
-        "type": "address"
+        "type": "bool"
       }
     ],
-    "payable": false,
-    "stateMutability": "view",
+    "stateMutability": "nonpayable",
     "type": "function"
   }
 ]
diff --git a/abis/Voting_abi.json b/abis/Voting_abi.json
index 762687b..df7c217 100644
--- a/abis/Voting_abi.json
+++ b/abis/Voting_abi.json
@@ -1,692 +1,792 @@
 [
   {
-    "constant": true,
+    "anonymous": false,
     "inputs": [
       {
-        "name": "_id",
+        "indexed": true,
+        "internalType": "uint256",
+        "name": "id",
         "type": "uint256"
+      },
+      {
+        "indexed": true,
+        "internalType": "address",
+        "name": "creator",
+        "type": "address"
       }
     ],
-    "name": "getStartBlock",
-    "outputs": [
+    "name": "BallotCreated",
+    "type": "event"
+  },
+  {
+    "anonymous": false,
+    "inputs": [
       {
-        "name": "",
+        "indexed": true,
+        "internalType": "uint256",
+        "name": "id",
         "type": "uint256"
       }
     ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
+    "name": "BallotFinalized",
+    "type": "event"
   },
   {
-    "constant": true,
+    "anonymous": false,
     "inputs": [
       {
-        "name": "_id",
+        "indexed": true,
+        "internalType": "uint256",
+        "name": "id",
+        "type": "uint256"
+      },
+      {
+        "indexed": false,
+        "internalType": "uint256",
+        "name": "decision",
         "type": "uint256"
+      },
+      {
+        "indexed": true,
+        "internalType": "address",
+        "name": "voter",
+        "type": "address"
       }
     ],
-    "name": "getQuorumState",
+    "name": "Vote",
+    "type": "event"
+  },
+  {
+    "inputs": [],
+    "name": "DECIMALS",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "MIN_BALLOT_DURATION_CYCLES",
+    "name": "MAX_BALLOT_DURATION_CYCLES",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [
+    "inputs": [],
+    "name": "MAX_LIMIT_OF_BALLOTS",
+    "outputs": [
       {
-        "name": "_id",
+        "internalType": "uint256",
+        "name": "",
         "type": "uint256"
-      },
-      {
-        "name": "_key",
-        "type": "address"
       }
     ],
-    "name": "getVoterChoice",
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "MINIMUM_TURNOUT_BP",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [
+    "inputs": [],
+    "name": "MIN_BALLOT_DURATION_CYCLES",
+    "outputs": [
       {
-        "name": "_id",
+        "internalType": "uint256",
+        "name": "",
         "type": "uint256"
       }
     ],
-    "name": "getAccepted",
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "activeBallots",
     "outputs": [
       {
+        "internalType": "uint256[]",
         "name": "",
-        "type": "uint256"
+        "type": "uint256[]"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
-        "name": "_id",
+        "internalType": "uint256",
+        "name": "_index",
         "type": "uint256"
       }
     ],
-    "name": "getIsFinalized",
+    "name": "activeBallotsAtIndex",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
-        "type": "bool"
+        "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [
-      {
-        "name": "_id",
-        "type": "uint256"
-      }
-    ],
-    "name": "isActiveBallot",
+    "inputs": [],
+    "name": "activeBallotsLength",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
-        "type": "bool"
+        "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
+        "internalType": "uint256",
         "name": "_id",
         "type": "uint256"
       }
     ],
-    "name": "getFinalizeCalled",
+    "name": "canBeFinalized",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
         "type": "bool"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [],
-    "name": "DECIMALS",
+    "inputs": [
+      {
+        "internalType": "uint256",
+        "name": "_id",
+        "type": "uint256"
+      }
+    ],
+    "name": "getAccepted",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [],
-    "name": "MINIMUM_TURNOUT_BP",
+    "inputs": [
+      {
+        "internalType": "uint256",
+        "name": "_id",
+        "type": "uint256"
+      },
+      {
+        "internalType": "address",
+        "name": "_key",
+        "type": "address"
+      }
+    ],
+    "name": "getBallotInfo",
     "outputs": [
       {
-        "name": "",
+        "internalType": "uint256",
+        "name": "startBlock",
+        "type": "uint256"
+      },
+      {
+        "internalType": "uint256",
+        "name": "endBlock",
+        "type": "uint256"
+      },
+      {
+        "internalType": "bool",
+        "name": "isFinalized",
+        "type": "bool"
+      },
+      {
+        "internalType": "address",
+        "name": "proposedValue",
+        "type": "address"
+      },
+      {
+        "internalType": "uint256",
+        "name": "contractType",
+        "type": "uint256"
+      },
+      {
+        "internalType": "address",
+        "name": "creator",
+        "type": "address"
+      },
+      {
+        "internalType": "string",
+        "name": "description",
+        "type": "string"
+      },
+      {
+        "internalType": "bool",
+        "name": "canBeFinalizedNow",
+        "type": "bool"
+      },
+      {
+        "internalType": "bool",
+        "name": "alreadyVoted",
+        "type": "bool"
+      },
+      {
+        "internalType": "bool",
+        "name": "belowTurnOut",
+        "type": "bool"
+      },
+      {
+        "internalType": "uint256",
+        "name": "accepted",
+        "type": "uint256"
+      },
+      {
+        "internalType": "uint256",
+        "name": "rejected",
+        "type": "uint256"
+      },
+      {
+        "internalType": "uint256",
+        "name": "totalStake",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "isInitialized",
+    "name": "getBallotLimitPerValidator",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
-        "type": "bool"
+        "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [],
-    "name": "getNextBallotId",
+    "inputs": [
+      {
+        "internalType": "uint256",
+        "name": "_id",
+        "type": "uint256"
+      }
+    ],
+    "name": "getBallotType",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
+        "internalType": "uint256",
         "name": "_id",
         "type": "uint256"
       }
     ],
-    "name": "getTotalStake",
+    "name": "getBelowTurnOut",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
-        "type": "uint256"
+        "type": "bool"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [],
-    "name": "MAX_BALLOT_DURATION_CYCLES",
+    "inputs": [
+      {
+        "internalType": "uint256",
+        "name": "_id",
+        "type": "uint256"
+      }
+    ],
+    "name": "getContractType",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
+        "internalType": "uint256",
         "name": "_id",
         "type": "uint256"
       }
     ],
-    "name": "getDescription",
+    "name": "getCreator",
     "outputs": [
       {
+        "internalType": "address",
         "name": "",
-        "type": "string"
+        "type": "address"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
+        "internalType": "uint256",
         "name": "_id",
         "type": "uint256"
       }
     ],
-    "name": "getBelowTurnOut",
+    "name": "getDescription",
     "outputs": [
       {
+        "internalType": "string",
         "name": "",
-        "type": "bool"
+        "type": "string"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
+        "internalType": "uint256",
         "name": "_id",
         "type": "uint256"
       }
     ],
-    "name": "getRejected",
+    "name": "getEndBlock",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [],
-    "name": "activeBallotsLength",
+    "inputs": [
+      {
+        "internalType": "uint256",
+        "name": "_id",
+        "type": "uint256"
+      }
+    ],
+    "name": "getFinalizeCalled",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
-        "type": "uint256"
+        "type": "bool"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
-        "name": "_address",
-        "type": "address"
+        "internalType": "uint256",
+        "name": "_id",
+        "type": "uint256"
       }
     ],
-    "name": "isValidVotingKey",
+    "name": "getIndex",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
-        "type": "bool"
+        "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
+        "internalType": "uint256",
         "name": "_id",
         "type": "uint256"
       }
     ],
-    "name": "canBeFinalized",
+    "name": "getIsFinalized",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
         "type": "bool"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "MAX_LIMIT_OF_BALLOTS",
+    "name": "getMaxBallotDurationCycles",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
-    "stateMutability": "view",
+    "stateMutability": "pure",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "getMaxBallotDurationCycles",
+    "name": "getMinBallotDurationCycles",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "pure",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [
-      {
-        "name": "_id",
-        "type": "uint256"
-      }
-    ],
-    "name": "getEndBlock",
+    "inputs": [],
+    "name": "getNextBallotId",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
+        "internalType": "uint256",
         "name": "_id",
         "type": "uint256"
       }
     ],
-    "name": "getIndex",
+    "name": "getProposedActivationBlock",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
+        "internalType": "uint256",
         "name": "_id",
         "type": "uint256"
       }
     ],
-    "name": "getContractType",
+    "name": "getProposedNodeVersion",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
+        "internalType": "uint256",
         "name": "_id",
         "type": "uint256"
-      },
-      {
-        "name": "_key",
-        "type": "address"
       }
     ],
-    "name": "hasAlreadyVoted",
+    "name": "getProposedValue",
     "outputs": [
       {
+        "internalType": "address",
         "name": "",
-        "type": "bool"
+        "type": "address"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "activeBallots",
+    "name": "getProxyStorage",
     "outputs": [
       {
+        "internalType": "address",
         "name": "",
-        "type": "uint256[]"
+        "type": "address"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
+        "internalType": "uint256",
         "name": "_id",
         "type": "uint256"
       }
     ],
-    "name": "getCreator",
+    "name": "getQuorumState",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
-        "type": "address"
+        "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
+        "internalType": "uint256",
         "name": "_id",
         "type": "uint256"
       }
     ],
-    "name": "getProposedValue",
+    "name": "getRejected",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
-        "type": "address"
+        "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
-        "name": "_index",
+        "internalType": "uint256",
+        "name": "_id",
         "type": "uint256"
       }
     ],
-    "name": "activeBallotsAtIndex",
+    "name": "getStartBlock",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [],
-    "name": "getProxyStorage",
+    "inputs": [
+      {
+        "internalType": "uint256",
+        "name": "_id",
+        "type": "uint256"
+      }
+    ],
+    "name": "getTotalStake",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
-        "type": "address"
+        "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
-        "name": "_contractType",
+        "internalType": "uint256",
+        "name": "_id",
         "type": "uint256"
+      },
+      {
+        "internalType": "address",
+        "name": "_key",
+        "type": "address"
       }
     ],
-    "name": "validContractType",
+    "name": "getVoterChoice",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
-        "type": "bool"
+        "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [],
-    "name": "getMinBallotDurationCycles",
+    "inputs": [
+      {
+        "internalType": "uint256",
+        "name": "_id",
+        "type": "uint256"
+      },
+      {
+        "internalType": "address",
+        "name": "_key",
+        "type": "address"
+      }
+    ],
+    "name": "hasAlreadyVoted",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
-        "type": "uint256"
+        "type": "bool"
       }
     ],
-    "payable": false,
-    "stateMutability": "pure",
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "initialize",
+    "outputs": [],
+    "stateMutability": "nonpayable",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
-        "name": "_key",
-        "type": "address"
+        "internalType": "uint256",
+        "name": "_id",
+        "type": "uint256"
       }
     ],
-    "name": "validatorActiveBallots",
+    "name": "isActiveBallot",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
-        "type": "uint256"
+        "type": "bool"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "getBallotLimitPerValidator",
+    "name": "isInitialized",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
-        "type": "uint256"
+        "type": "bool"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "anonymous": false,
     "inputs": [
       {
-        "indexed": true,
-        "name": "id",
-        "type": "uint256"
-      },
-      {
-        "indexed": true,
-        "name": "creator",
+        "internalType": "address",
+        "name": "_address",
         "type": "address"
       }
     ],
-    "name": "BallotCreated",
-    "type": "event"
-  },
-  {
-    "anonymous": false,
-    "inputs": [
-      {
-        "indexed": true,
-        "name": "id",
-        "type": "uint256"
-      }
-    ],
-    "name": "BallotFinalized",
-    "type": "event"
-  },
-  {
-    "anonymous": false,
-    "inputs": [
-      {
-        "indexed": true,
-        "name": "id",
-        "type": "uint256"
-      },
-      {
-        "indexed": false,
-        "name": "decision",
-        "type": "uint256"
-      },
+    "name": "isValidVotingKey",
+    "outputs": [
       {
-        "indexed": true,
-        "name": "voter",
-        "type": "address"
+        "internalType": "bool",
+        "name": "",
+        "type": "bool"
       }
     ],
-    "name": "Vote",
-    "type": "event"
-  },
-  {
-    "constant": false,
-    "inputs": [],
-    "name": "initialize",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
+    "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": false,
     "inputs": [
       {
+        "internalType": "uint256",
         "name": "_startAfterNumberOfCycles",
         "type": "uint256"
       },
       {
+        "internalType": "uint256",
         "name": "_cyclesDuration",
         "type": "uint256"
       },
       {
+        "internalType": "uint256",
         "name": "_contractType",
         "type": "uint256"
       },
       {
+        "internalType": "address",
         "name": "_proposedValue",
         "type": "address"
       },
       {
+        "internalType": "string",
         "name": "_description",
         "type": "string"
       }
@@ -694,114 +794,119 @@
     "name": "newBallot",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "nonpayable",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
-        "name": "_id",
+        "internalType": "uint256",
+        "name": "_startAfterNumberOfCycles",
         "type": "uint256"
       },
       {
-        "name": "_key",
-        "type": "address"
-      }
-    ],
-    "name": "getBallotInfo",
-    "outputs": [
-      {
-        "name": "startBlock",
+        "internalType": "uint256",
+        "name": "_cyclesDuration",
         "type": "uint256"
       },
       {
-        "name": "endBlock",
+        "internalType": "uint256",
+        "name": "_version",
         "type": "uint256"
       },
       {
-        "name": "isFinalized",
-        "type": "bool"
-      },
-      {
-        "name": "proposedValue",
-        "type": "address"
-      },
-      {
-        "name": "contractType",
+        "internalType": "uint256",
+        "name": "_activationBlock",
         "type": "uint256"
       },
       {
-        "name": "creator",
-        "type": "address"
-      },
-      {
-        "name": "description",
+        "internalType": "string",
+        "name": "_description",
         "type": "string"
-      },
-      {
-        "name": "canBeFinalizedNow",
-        "type": "bool"
-      },
-      {
-        "name": "alreadyVoted",
-        "type": "bool"
-      },
-      {
-        "name": "belowTurnOut",
-        "type": "bool"
-      },
+      }
+    ],
+    "name": "newNodeVersionBallot",
+    "outputs": [
       {
-        "name": "accepted",
+        "internalType": "uint256",
+        "name": "",
         "type": "uint256"
-      },
+      }
+    ],
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "inputs": [
       {
-        "name": "rejected",
-        "type": "uint256"
-      },
+        "internalType": "address[]",
+        "name": "validators",
+        "type": "address[]"
+      }
+    ],
+    "name": "onCycleEnd",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "inputs": [
       {
-        "name": "totalStake",
+        "internalType": "uint256",
+        "name": "_contractType",
         "type": "uint256"
       }
     ],
-    "payable": false,
+    "name": "validContractType",
+    "outputs": [
+      {
+        "internalType": "bool",
+        "name": "",
+        "type": "bool"
+      }
+    ],
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": false,
     "inputs": [
       {
-        "name": "_id",
-        "type": "uint256"
-      },
+        "internalType": "address",
+        "name": "_key",
+        "type": "address"
+      }
+    ],
+    "name": "validatorActiveBallots",
+    "outputs": [
       {
-        "name": "_choice",
+        "internalType": "uint256",
+        "name": "",
         "type": "uint256"
       }
     ],
-    "name": "vote",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
+    "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": false,
     "inputs": [
       {
-        "name": "validators",
-        "type": "address[]"
+        "internalType": "uint256",
+        "name": "_id",
+        "type": "uint256"
+      },
+      {
+        "internalType": "uint256",
+        "name": "_choice",
+        "type": "uint256"
       }
     ],
-    "name": "onCycleEnd",
+    "name": "vote",
     "outputs": [],
-    "payable": false,
     "stateMutability": "nonpayable",
     "type": "function"
   }
diff --git a/app/abi/blockReward.json b/app/abi/blockReward.json
index becd4c4..d1ba8dd 100644
--- a/app/abi/blockReward.json
+++ b/app/abi/blockReward.json
@@ -1,244 +1,252 @@
 [
   {
-    "constant": true,
+    "anonymous": false,
+    "inputs": [
+      {
+        "indexed": false,
+        "internalType": "address[]",
+        "name": "receivers",
+        "type": "address[]"
+      },
+      {
+        "indexed": false,
+        "internalType": "uint256[]",
+        "name": "rewards",
+        "type": "uint256[]"
+      }
+    ],
+    "name": "Rewarded",
+    "type": "event"
+  },
+  {
+    "anonymous": false,
+    "inputs": [
+      {
+        "indexed": false,
+        "internalType": "uint256",
+        "name": "amount",
+        "type": "uint256"
+      }
+    ],
+    "name": "RewardedOnCycle",
+    "type": "event"
+  },
+  {
     "inputs": [],
-    "name": "DECIMALS",
+    "name": "BLOCKS_PER_YEAR",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "isInitialized",
+    "name": "DECIMALS",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
-        "type": "bool"
+        "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
     "name": "INFLATION",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "BLOCKS_PER_YEAR",
+    "name": "emitRewardedOnCycle",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "getBlockRewardAmount",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "anonymous": false,
     "inputs": [
       {
-        "indexed": false,
-        "name": "receivers",
-        "type": "address[]"
-      },
-      {
-        "indexed": false,
-        "name": "rewards",
-        "type": "uint256[]"
+        "internalType": "address",
+        "name": "_validator",
+        "type": "address"
       }
     ],
-    "name": "Rewarded",
-    "type": "event"
-  },
-  {
-    "anonymous": false,
-    "inputs": [
+    "name": "getBlockRewardAmountPerValidator",
+    "outputs": [
       {
-        "indexed": false,
-        "name": "amount",
+        "internalType": "uint256",
+        "name": "",
         "type": "uint256"
       }
     ],
-    "name": "RewardedOnCycle",
-    "type": "event"
+    "stateMutability": "view",
+    "type": "function"
   },
   {
-    "constant": false,
-    "inputs": [
+    "inputs": [],
+    "name": "getBlocksPerYear",
+    "outputs": [
       {
-        "name": "_supply",
+        "internalType": "uint256",
+        "name": "",
         "type": "uint256"
       }
     ],
-    "name": "initialize",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
+    "stateMutability": "pure",
     "type": "function"
   },
   {
-    "constant": false,
-    "inputs": [
-      {
-        "name": "benefactors",
-        "type": "address[]"
-      },
-      {
-        "name": "kind",
-        "type": "uint16[]"
-      }
-    ],
-    "name": "reward",
+    "inputs": [],
+    "name": "getInflation",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
-        "type": "address[]"
-      },
-      {
-        "name": "",
-        "type": "uint256[]"
+        "type": "uint256"
       }
     ],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "constant": false,
-    "inputs": [],
-    "name": "onCycleEnd",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "constant": false,
-    "inputs": [],
-    "name": "emitRewardedOnCycle",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
+    "stateMutability": "pure",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "getTotalSupply",
+    "name": "getProxyStorage",
     "outputs": [
       {
+        "internalType": "address",
         "name": "",
-        "type": "uint256"
+        "type": "address"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
     "name": "getRewardedOnCycle",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "getInflation",
+    "name": "getTotalSupply",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
-    "stateMutability": "pure",
+    "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [],
-    "name": "getBlocksPerYear",
-    "outputs": [
+    "inputs": [
       {
-        "name": "",
+        "internalType": "uint256",
+        "name": "_supply",
         "type": "uint256"
       }
     ],
-    "payable": false,
-    "stateMutability": "pure",
+    "name": "initialize",
+    "outputs": [],
+    "stateMutability": "nonpayable",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "getBlockRewardAmount",
+    "name": "isInitialized",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
-        "type": "uint256"
+        "type": "bool"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "getProxyStorage",
+    "name": "onCycleEnd",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "inputs": [
+      {
+        "internalType": "address[]",
+        "name": "benefactors",
+        "type": "address[]"
+      },
+      {
+        "internalType": "uint16[]",
+        "name": "kind",
+        "type": "uint16[]"
+      }
+    ],
+    "name": "reward",
     "outputs": [
       {
+        "internalType": "address[]",
         "name": "",
-        "type": "address"
+        "type": "address[]"
+      },
+      {
+        "internalType": "uint256[]",
+        "name": "",
+        "type": "uint256[]"
       }
     ],
-    "payable": false,
-    "stateMutability": "view",
+    "stateMutability": "nonpayable",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
     "name": "shouldEmitRewardedOnCycle",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
         "type": "bool"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   }
-]
\ No newline at end of file
+]
diff --git a/app/abi/consensus.json b/app/abi/consensus.json
index 0fe7207..36f699f 100644
--- a/app/abi/consensus.json
+++ b/app/abi/consensus.json
@@ -1,232 +1,496 @@
 [
   {
-    "constant": true,
+    "anonymous": false,
+    "inputs": [
+      {
+        "indexed": false,
+        "internalType": "address[]",
+        "name": "newSet",
+        "type": "address[]"
+      }
+    ],
+    "name": "ChangeFinalized",
+    "type": "event"
+  },
+  {
+    "anonymous": false,
+    "inputs": [
+      {
+        "indexed": true,
+        "internalType": "bytes32",
+        "name": "parentHash",
+        "type": "bytes32"
+      },
+      {
+        "indexed": false,
+        "internalType": "address[]",
+        "name": "newSet",
+        "type": "address[]"
+      }
+    ],
+    "name": "InitiateChange",
+    "type": "event"
+  },
+  {
+    "anonymous": false,
+    "inputs": [
+      {
+        "indexed": false,
+        "internalType": "uint256",
+        "name": "requiredVersion",
+        "type": "uint256"
+      },
+      {
+        "indexed": false,
+        "internalType": "uint256",
+        "name": "upgradedCount",
+        "type": "uint256"
+      },
+      {
+        "indexed": false,
+        "internalType": "uint256",
+        "name": "totalCount",
+        "type": "uint256"
+      },
+      {
+        "indexed": false,
+        "internalType": "bool",
+        "name": "quorumReached",
+        "type": "bool"
+      }
+    ],
+    "name": "NodeVersionCheckExecuted",
+    "type": "event"
+  },
+  {
+    "anonymous": false,
+    "inputs": [
+      {
+        "indexed": true,
+        "internalType": "address",
+        "name": "validator",
+        "type": "address"
+      },
+      {
+        "indexed": false,
+        "internalType": "uint256",
+        "name": "version",
+        "type": "uint256"
+      }
+    ],
+    "name": "NodeVersionReported",
+    "type": "event"
+  },
+  {
+    "anonymous": false,
+    "inputs": [
+      {
+        "indexed": false,
+        "internalType": "uint256",
+        "name": "version",
+        "type": "uint256"
+      },
+      {
+        "indexed": false,
+        "internalType": "uint256",
+        "name": "activationBlock",
+        "type": "uint256"
+      }
+    ],
+    "name": "RequiredNodeVersionSet",
+    "type": "event"
+  },
+  {
+    "anonymous": false,
     "inputs": [],
-    "name": "getLastSnapshotTakenAtBlock",
+    "name": "ShouldEmitInitiateChange",
+    "type": "event"
+  },
+  {
+    "stateMutability": "payable",
+    "type": "fallback"
+  },
+  {
+    "inputs": [],
+    "name": "CYCLE_DURATION_BLOCKS",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [
+    "inputs": [],
+    "name": "DECIMALS",
+    "outputs": [
       {
-        "name": "_p",
+        "internalType": "uint256",
+        "name": "",
         "type": "uint256"
       }
     ],
-    "name": "pendingValidatorsAtPosition",
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "DEFAULT_VALIDATOR_FEE",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
-        "type": "address"
+        "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [
+    "inputs": [],
+    "name": "MAX_STAKE",
+    "outputs": [
       {
-        "name": "_snapshotId",
+        "internalType": "uint256",
+        "name": "",
         "type": "uint256"
       }
     ],
-    "name": "getSnapshotAddresses",
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "MAX_STRIKE_COUNT",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
-        "type": "address[]"
+        "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": false,
-    "inputs": [
+    "inputs": [],
+    "name": "MAX_VALIDATORS",
+    "outputs": [
       {
-        "name": "_newAddress",
-        "type": "address"
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
       }
     ],
-    "name": "setProxyStorage",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
+    "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [
-      {
-        "name": "_address",
-        "type": "address"
-      },
+    "inputs": [],
+    "name": "MIN_STAKE",
+    "outputs": [
       {
-        "name": "_validator",
-        "type": "address"
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
       }
     ],
-    "name": "delegatedAmount",
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "SNAPSHOTS_PER_CYCLE",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "SNAPSHOTS_PER_CYCLE",
+    "name": "STRIKE_RESET",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "pendingValidatorsLength",
+    "name": "UPGRADE_QUORUM_BP",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "newValidatorSetLength",
+    "name": "VALIDATOR_PRODUCTIVITY_BP",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [],
-    "name": "DECIMALS",
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "_validator",
+        "type": "address"
+      }
+    ],
+    "name": "blockCounter",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "isInitialized",
+    "name": "currentValidators",
     "outputs": [
       {
+        "internalType": "address[]",
         "name": "",
-        "type": "bool"
+        "type": "address[]"
+      }
+    ],
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [
+      {
+        "internalType": "uint256",
+        "name": "_p",
+        "type": "uint256"
+      }
+    ],
+    "name": "currentValidatorsAtPosition",
+    "outputs": [
+      {
+        "internalType": "address",
+        "name": "",
+        "type": "address"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
     "name": "currentValidatorsLength",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [],
-    "name": "getMinStake",
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "_validator",
+        "type": "address"
+      }
+    ],
+    "name": "cycle",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "_validator",
+        "type": "address"
+      }
+    ],
+    "name": "delegate",
+    "outputs": [],
+    "stateMutability": "payable",
+    "type": "function"
+  },
+  {
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "_address",
+        "type": "address"
+      },
+      {
+        "internalType": "address",
+        "name": "_validator",
+        "type": "address"
+      }
+    ],
+    "name": "delegatedAmount",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
-    "stateMutability": "pure",
+    "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
+        "internalType": "address",
+        "name": "_validator",
+        "type": "address"
+      }
+    ],
+    "name": "delegators",
+    "outputs": [
+      {
+        "internalType": "address[]",
+        "name": "",
+        "type": "address[]"
+      }
+    ],
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "_validator",
+        "type": "address"
+      },
+      {
+        "internalType": "uint256",
         "name": "_p",
         "type": "uint256"
       }
     ],
-    "name": "currentValidatorsAtPosition",
+    "name": "delegatorsAtPosition",
     "outputs": [
       {
+        "internalType": "address",
         "name": "",
         "type": "address"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "_validator",
+        "type": "address"
+      }
+    ],
+    "name": "delegatorsLength",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
     "inputs": [],
-    "name": "newValidatorSet",
+    "name": "emitInitiateChange",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "finalizeChange",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "getCurrentCycleEndBlock",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
-        "type": "address[]"
+        "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
+    "inputs": [],
+    "name": "getCurrentCycleStartBlock",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "getCycleDurationBlocks",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "stateMutability": "pure",
+    "type": "function"
+  },
+  {
     "inputs": [
       {
+        "internalType": "address",
         "name": "_validator",
         "type": "address"
       },
       {
+        "internalType": "uint256",
         "name": "_rewardAmount",
         "type": "uint256"
       }
@@ -234,176 +498,279 @@
     "name": "getDelegatorsForRewardDistribution",
     "outputs": [
       {
+        "internalType": "address[]",
         "name": "",
         "type": "address[]"
       },
       {
+        "internalType": "uint256[]",
         "name": "",
         "type": "uint256[]"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "MAX_VALIDATORS",
+    "name": "getLastSnapshotTakenAtBlock",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
+    "inputs": [],
+    "name": "getMaxStake",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "stateMutability": "pure",
+    "type": "function"
+  },
+  {
     "inputs": [],
     "name": "getMaxValidators",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "pure",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "CYCLE_DURATION_BLOCKS",
+    "name": "getMinStake",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
-    "stateMutability": "view",
+    "stateMutability": "pure",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "getSnapshotsPerCycle",
+    "name": "getMinValidatorFee",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "pure",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "requiredSignatures",
+    "name": "getNextSnapshotId",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
+        "internalType": "address",
         "name": "_validator",
         "type": "address"
       }
     ],
-    "name": "delegators",
+    "name": "getNodeVersion",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "getNodeVersionActivationBlock",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "getProxyStorage",
+    "outputs": [
+      {
+        "internalType": "address",
+        "name": "",
+        "type": "address"
+      }
+    ],
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "_validator",
+        "type": "address"
+      }
+    ],
+    "name": "getReleaseBlock",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "getRequiredNodeVersion",
     "outputs": [
       {
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [
+      {
+        "internalType": "uint256",
+        "name": "_snapshotId",
+        "type": "uint256"
+      }
+    ],
+    "name": "getSnapshotAddresses",
+    "outputs": [
+      {
+        "internalType": "address[]",
         "name": "",
         "type": "address[]"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "isFinalized",
+    "name": "getSnapshotsPerCycle",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "stateMutability": "pure",
+    "type": "function"
+  },
+  {
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "_validator",
+        "type": "address"
+      }
+    ],
+    "name": "getStrikeReset",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
-        "type": "bool"
+        "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [],
-    "name": "DEFAULT_VALIDATOR_FEE",
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "_validator",
+        "type": "address"
+      }
+    ],
+    "name": "getStrikes",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
         "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "getCurrentCycleStartBlock",
+    "name": "getValidators",
     "outputs": [
       {
+        "internalType": "address[]",
         "name": "",
-        "type": "uint256"
+        "type": "address[]"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
-        "name": "_validator",
+        "internalType": "address",
+        "name": "_initialValidator",
         "type": "address"
       }
     ],
-    "name": "validatorFee",
-    "outputs": [
-      {
-        "name": "",
-        "type": "uint256"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "view",
+    "name": "initialize",
+    "outputs": [],
+    "stateMutability": "nonpayable",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
+        "internalType": "address",
         "name": "_validator",
         "type": "address"
       },
       {
+        "internalType": "address",
         "name": "_address",
         "type": "address"
       }
@@ -411,387 +778,414 @@
     "name": "isDelegator",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
         "type": "bool"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "currentValidators",
+    "name": "isFinalized",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
-        "type": "address[]"
+        "type": "bool"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "getCycleDurationBlocks",
+    "name": "isInitialized",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
-        "type": "uint256"
+        "type": "bool"
       }
     ],
-    "payable": false,
-    "stateMutability": "pure",
+    "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [],
-    "name": "pendingValidators",
+    "inputs": [
+      {
+        "internalType": "address",
+        "name": "_address",
+        "type": "address"
+      }
+    ],
+    "name": "isJailed",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
-        "type": "address[]"
+        "type": "bool"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "getCurrentCycleEndBlock",
+    "name": "isNodeVersionCheckExecuted",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
-        "type": "uint256"
+        "type": "bool"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
+        "internalType": "address",
         "name": "_address",
         "type": "address"
       }
     ],
-    "name": "stakeAmount",
-    "outputs": [
-      {
-        "name": "",
-        "type": "uint256"
-      }
-    ],
-    "payable": false,
-    "stateMutability": "view",
-    "type": "function"
-  },
-  {
-    "constant": true,
-    "inputs": [],
-    "name": "MIN_STAKE",
+    "name": "isPendingValidator",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
-        "type": "uint256"
+        "type": "bool"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
-        "name": "_validator",
+        "internalType": "address",
+        "name": "_address",
         "type": "address"
       }
     ],
-    "name": "delegatorsLength",
+    "name": "isValidator",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
-        "type": "uint256"
+        "type": "bool"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "getNextSnapshotId",
+    "name": "jailedValidators",
     "outputs": [
       {
+        "internalType": "address[]",
         "name": "",
-        "type": "uint256"
+        "type": "address[]"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
-        "name": "_validator",
-        "type": "address"
-      },
-      {
+        "internalType": "uint256",
         "name": "_p",
         "type": "uint256"
       }
     ],
-    "name": "delegatorsAtPosition",
+    "name": "jailedValidatorsAtPosition",
     "outputs": [
       {
+        "internalType": "address",
         "name": "",
         "type": "address"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "getProxyStorage",
+    "name": "jailedValidatorsLength",
     "outputs": [
       {
+        "internalType": "uint256",
         "name": "",
-        "type": "address"
+        "type": "uint256"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "shouldEmitInitiateChange",
+    "name": "maintenance",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "newValidatorSet",
     "outputs": [
       {
+        "internalType": "address[]",
         "name": "",
-        "type": "bool"
+        "type": "address[]"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
-    "inputs": [
+    "inputs": [],
+    "name": "newValidatorSetLength",
+    "outputs": [
       {
-        "name": "_address",
-        "type": "address"
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
       }
     ],
-    "name": "isValidator",
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "pendingValidators",
     "outputs": [
       {
+        "internalType": "address[]",
         "name": "",
-        "type": "bool"
+        "type": "address[]"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
       {
-        "name": "_address",
-        "type": "address"
+        "internalType": "uint256",
+        "name": "_p",
+        "type": "uint256"
       }
     ],
-    "name": "isPendingValidator",
+    "name": "pendingValidatorsAtPosition",
     "outputs": [
       {
+        "internalType": "address",
         "name": "",
-        "type": "bool"
+        "type": "address"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "payable": true,
-    "stateMutability": "payable",
-    "type": "fallback"
+    "inputs": [],
+    "name": "pendingValidatorsLength",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "stateMutability": "view",
+    "type": "function"
   },
   {
-    "anonymous": false,
     "inputs": [
       {
-        "indexed": false,
-        "name": "newSet",
-        "type": "address[]"
+        "internalType": "uint256",
+        "name": "_version",
+        "type": "uint256"
       }
     ],
-    "name": "ChangeFinalized",
-    "type": "event"
+    "name": "reportNodeVersion",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
   },
   {
-    "anonymous": false,
     "inputs": [],
-    "name": "ShouldEmitInitiateChange",
-    "type": "event"
+    "name": "requiredSignatures",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "stateMutability": "view",
+    "type": "function"
   },
   {
-    "anonymous": false,
     "inputs": [
       {
-        "indexed": true,
-        "name": "parentHash",
-        "type": "bytes32"
+        "internalType": "address",
+        "name": "_newAddress",
+        "type": "address"
+      }
+    ],
+    "name": "setProxyStorage",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "inputs": [
+      {
+        "internalType": "uint256",
+        "name": "_version",
+        "type": "uint256"
       },
       {
-        "indexed": false,
-        "name": "newSet",
-        "type": "address[]"
+        "internalType": "uint256",
+        "name": "_activationBlock",
+        "type": "uint256"
       }
     ],
-    "name": "InitiateChange",
-    "type": "event"
+    "name": "setRequiredNodeVersion",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
   },
   {
-    "constant": false,
     "inputs": [
       {
-        "name": "_initialValidator",
-        "type": "address"
+        "internalType": "uint256",
+        "name": "_amount",
+        "type": "uint256"
       }
     ],
-    "name": "initialize",
+    "name": "setValidatorFee",
     "outputs": [],
-    "payable": false,
     "stateMutability": "nonpayable",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [],
-    "name": "getValidators",
+    "name": "shouldEmitInitiateChange",
     "outputs": [
       {
+        "internalType": "bool",
         "name": "",
-        "type": "address[]"
+        "type": "bool"
       }
     ],
-    "payable": false,
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": false,
-    "inputs": [],
-    "name": "finalizeChange",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "constant": false,
     "inputs": [],
     "name": "stake",
     "outputs": [],
-    "payable": true,
     "stateMutability": "payable",
     "type": "function"
   },
   {
-    "constant": false,
     "inputs": [
       {
-        "name": "_validator",
+        "internalType": "address",
+        "name": "_address",
         "type": "address"
       }
     ],
-    "name": "delegate",
-    "outputs": [],
-    "payable": true,
-    "stateMutability": "payable",
+    "name": "stakeAmount",
+    "outputs": [
+      {
+        "internalType": "uint256",
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": false,
-    "inputs": [
+    "inputs": [],
+    "name": "totalStakeAmount",
+    "outputs": [
       {
-        "name": "_amount",
+        "internalType": "uint256",
+        "name": "",
         "type": "uint256"
       }
     ],
-    "name": "withdraw",
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "unJail",
     "outputs": [],
-    "payable": false,
     "stateMutability": "nonpayable",
     "type": "function"
   },
   {
-    "constant": false,
     "inputs": [
       {
+        "internalType": "address",
         "name": "_validator",
         "type": "address"
-      },
+      }
+    ],
+    "name": "validatorFee",
+    "outputs": [
       {
-        "name": "_amount",
+        "internalType": "uint256",
+        "name": "",
         "type": "uint256"
       }
     ],
-    "name": "withdraw",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
-    "type": "function"
-  },
-  {
-    "constant": false,
-    "inputs": [],
-    "name": "cycle",
-    "outputs": [],
-    "payable": false,
-    "stateMutability": "nonpayable",
+    "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": false,
-    "inputs": [],
-    "name": "emitInitiateChange",
+    "inputs": [
+      {
+        "internalType": "uint256",
+        "name": "_amount",
+        "type": "uint256"
+      }
+    ],
+    "name": "withdraw",
     "outputs": [],
-    "payable": false,
     "stateMutability": "nonpayable",
     "type": "function"
   },
   {
-    "constant": false,
     "inputs": [
       {
+        "internalType": "address",
+        "name": "_validator",
+        "type": "address"
+      },
+      {
+        "internalType": "uint256",
         "name": "_amount",
         "type": "uint256"
       }
     ],
-    "name": "setValidatorFee",
+    "name": "withdraw",
     "outputs": [],
-    "payable": false,
     "stateMutability": "nonpayable",
     "type": "function"
+  },
+  {
+    "stateMutability": "payable",
+    "type": "receive"
   }
-]
\ No newline at end of file
+]
diff --git a/app/index.js b/app/index.js
index 4295983..1b06657 100644
--- a/app/index.js
+++ b/app/index.js
@@ -70,6 +70,65 @@ function initBlockRewardContract() {
   blockReward = new web3.eth.Contract(require(path.join(cwd, 'abi/blockReward')), process.env.BLOCK_REWARD_ADDRESS)
 }
 
+function encodeNodeVersion(versionString) {
+  // use the last x.y.z component of the version string, so for a client image tag
+  // like 1.29.0-v6.0.3 the spec version (6.0.3) is the one reported
+  const re = /v?(\d+)\.(\d+)\.(\d+)/g
+  let match, last
+  while ((match = re.exec(versionString)) !== null) {
+    last = match
+  }
+  if (!last) {
+    return null
+  }
+  return parseInt(last[1]) * 1e6 + parseInt(last[2]) * 1e3 + parseInt(last[3])
+}
+
+let nodeVersionReported = false
+
+function reportNodeVersion() {
+  return new Promise(async (resolve) => {
+    try {
+      if (nodeVersionReported || !process.env.NODE_VERSION) {
+        return resolve()
+      }
+      const version = encodeNodeVersion(process.env.NODE_VERSION)
+      if (!version) {
+        logger.warn(`could not parse NODE_VERSION "${process.env.NODE_VERSION}", skipping version report`)
+        nodeVersionReported = true
+        return resolve()
+      }
+      const reported = await consensus.methods.getNodeVersion(account).call()
+      if (reported.toString() === version.toString()) {
+        logger.info(`node version ${version} already reported`)
+        nodeVersionReported = true
+        return resolve()
+      }
+      logger.info(`${account} sending reportNodeVersion(${version}) transaction`)
+      let nonce = await getNonce()
+      let gasPrice = await getGasPrice()
+      consensus.methods.reportNodeVersion(version).send({ from: account, gas: process.env.GAS || 1000000, gasPrice: process.env.GAS_PRICE || gasPrice, nonce: nonce })
+        .on('transactionHash', hash => {
+          logger.info(`transactionHash: ${hash}`)
+        })
+        .on('confirmation', (confirmationNumber, receipt) => {
+          if (confirmationNumber == 1) {
+            logger.debug(`receipt: ${JSON.stringify(receipt)}`)
+          }
+          nodeVersionReported = true
+          resolve()
+        })
+        .on('error', error => {
+          logger.error(error); resolve()
+        })
+    } catch (e) {
+      // do not crash the cycle loop if the consensus contract does not support version reporting yet
+      logger.warn(`reportNodeVersion failed: ${e.message}`)
+      resolve()
+    }
+  })
+}
+
 function emitInitiateChange() {
   return new Promise(async (resolve, reject) => {
     try {
@@ -148,6 +207,9 @@ async function runMain() {
     if (!blockReward) {
       initBlockRewardContract()
     }
+    // report the node version before the validator check - a version-jailed validator
+    // is no longer in the current set but must report its new version to be released
+    await reportNodeVersion()
     const isValidator = await consensus.methods.isValidator(web3.utils.toChecksumAddress(account)).call()
     if (!isValidator) {
       logger.warn(`${account} is not a validator, skipping`)
diff --git a/contracts/Consensus.sol b/contracts/Consensus.sol
index 3f8017c..7c475da 100644
--- a/contracts/Consensus.sol
+++ b/contracts/Consensus.sol
@@ -100,6 +100,7 @@ contract Consensus is ConsensusUtils {
       IVoting(ProxyStorage(getProxyStorage()).getVoting()).onCycleEnd(currentValidators());
       _setCurrentCycle();
       _checkJail(currentValidators());
+      _checkNodeVersions(currentValidators());
       address[] memory newSet = pendingValidators();
       if (newSet.length > 0) {
         _setNewValidatorSet(newSet);
@@ -136,9 +137,13 @@ contract Consensus is ConsensusUtils {
 
   /**
   * @dev Function to be called by jailed validator, in order to be released from jail
+  * When a network upgrade is scheduled, running (and reporting) the required node version is a release precondition
   */
   function unJail() external onlyJailedValidator {
     require(getReleaseBlock(msg.sender) <= getCurrentCycleEndBlock());
+    if (getRequiredNodeVersion() != 0) {
+      require(getNodeVersion(msg.sender) >= getRequiredNodeVersion());
+    }
 
     _removeFromJail(msg.sender);
   }
diff --git a/contracts/ConsensusUtils.sol b/contracts/ConsensusUtils.sol
index bd39e79..40864e9 100644
--- a/contracts/ConsensusUtils.sol
+++ b/contracts/ConsensusUtils.sol
@@ -20,6 +20,7 @@ abstract contract ConsensusUtils is EternalStorage, ValidatorSet {
   uint256 public constant VALIDATOR_PRODUCTIVITY_BP = 3000; // 30%
   uint256 public constant MAX_STRIKE_COUNT = 5;
   uint256 public constant STRIKE_RESET = 50; // reset strikes after 50 clean cycles
+  uint256 public constant UPGRADE_QUORUM_BP = 6600; // node version jailing only kicks in once more than 66% of validators have upgraded
 
   /**
   * @dev This event will be emitted after a change to the validator set has been finalized
@@ -32,6 +33,29 @@ abstract contract ConsensusUtils is EternalStorage, ValidatorSet {
   */
   event ShouldEmitInitiateChange();
 
+  /**
+  * @dev This event will be emitted when a validator reports the node version it is running
+  * @param validator the reporting validator
+  * @param version the reported version (encoded as major * 1e6 + minor * 1e3 + patch)
+  */
+  event NodeVersionReported(address indexed validator, uint256 version);
+
+  /**
+  * @dev This event will be emitted when a network upgrade is scheduled
+  * @param version minimum node version required for the upgrade (0 means the scheduled upgrade was cleared)
+  * @param activationBlock block at which the new spec activates
+  */
+  event RequiredNodeVersionSet(uint256 version, uint256 activationBlock);
+
+  /**
+  * @dev This event will be emitted when the node version check has run on the last cycle boundary before an upgrade
+  * @param requiredVersion minimum node version required
+  * @param upgradedCount number of current validators which reported the required version (or higher)
+  * @param totalCount total number of current validators
+  * @param quorumReached whether more than 66% of validators have upgraded (outdated validators only get jailed if true)
+  */
+  event NodeVersionCheckExecuted(uint256 requiredVersion, uint256 upgradedCount, uint256 totalCount, bool quorumReached);
+
   /**
   * @dev This modifier verifies that the change initiated has not been finalized yet
   */
@@ -64,6 +88,14 @@ abstract contract ConsensusUtils is EternalStorage, ValidatorSet {
     _;
   }
 
+  /**
+  * @dev This modifier verifies that msg.sender is the voting contract
+  */
+  modifier onlyVoting() {
+    require(msg.sender == ProxyStorage(getProxyStorage()).getVoting());
+    _;
+  }
+
   /**
   * @dev This modifier verifies that msg.sender is a validator
   */
@@ -95,6 +127,9 @@ abstract contract ConsensusUtils is EternalStorage, ValidatorSet {
   bytes32 internal constant SHOULD_EMIT_INITIATE_CHANGE = keccak256(abi.encodePacked("shouldEmitInitiateChange"));
   bytes32 internal constant TOTAL_STAKE_AMOUNT = keccak256(abi.encodePacked("totalStakeAmount"));
   bytes32 internal constant JAILED_VALIDATORS = keccak256(abi.encodePacked("jailedValidators"));
+  bytes32 internal constant REQUIRED_NODE_VERSION = keccak256(abi.encodePacked("requiredNodeVersion"));
+  bytes32 internal constant NODE_VERSION_ACTIVATION_BLOCK = keccak256(abi.encodePacked("nodeVersionActivationBlock"));
+  bytes32 internal constant NODE_VERSION_CHECK_EXECUTED = keccak256(abi.encodePacked("nodeVersionCheckExecuted"));
 
   function _delegate(address _staker, uint256 _amount, address _validator) internal {
     require(_staker != address(0));
@@ -240,6 +275,94 @@ abstract contract ConsensusUtils is EternalStorage, ValidatorSet {
     }
   }
 
+  /**
+  * @dev Function to be called by validators (their node app) to report the node/spec version they are running
+  * @param _version the version encoded as major * 1e6 + minor * 1e3 + patch (e.g. 6.0.3 => 6000003)
+  */
+  function reportNodeVersion(uint256 _version) external {
+    require(_version != 0);
+    uintStorage[keccak256(abi.encodePacked("nodeVersion", msg.sender))] = _version;
+    emit NodeVersionReported(msg.sender, _version);
+  }
+
+  function getNodeVersion(address _validator) public view returns(uint256) {
+    return uintStorage[keccak256(abi.encodePacked("nodeVersion", _validator))];
+  }
+
+  /**
+  * @dev Function to be called by the voting contract (on an accepted node version ballot) to schedule
+  * a network upgrade. On the last cycle boundary before _activationBlock, current validators which
+  * have not reported at least _version are jailed, provided more than 66% of the current validator
+  * set has upgraded.
+  * Should be scheduled at least 2 cycles before the new spec activates.
+  * Calling with _version == 0 clears a scheduled upgrade.
+  * @param _version minimum required node version (encoded as major * 1e6 + minor * 1e3 + patch)
+  * @param _activationBlock block at which the new spec activates
+  */
+  function setRequiredNodeVersion(uint256 _version, uint256 _activationBlock) external onlyVoting {
+    _setRequiredNodeVersion(_version, _activationBlock);
+  }
+
+  function _setRequiredNodeVersion(uint256 _version, uint256 _activationBlock) internal {
+    if (_version != 0) {
+      require(_activationBlock > block.number);
+      uintStorage[REQUIRED_NODE_VERSION] = _version;
+      uintStorage[NODE_VERSION_ACTIVATION_BLOCK] = _activationBlock;
+    } else {
+      uintStorage[REQUIRED_NODE_VERSION] = 0;
+      uintStorage[NODE_VERSION_ACTIVATION_BLOCK] = 0;
+    }
+    boolStorage[NODE_VERSION_CHECK_EXECUTED] = false;
+    emit RequiredNodeVersionSet(_version, _activationBlock);
+  }
+
+  function getRequiredNodeVersion() public view returns(uint256) {
+    return uintStorage[REQUIRED_NODE_VERSION];
+  }
+
+  function getNodeVersionActivationBlock() public view returns(uint256) {
+    return uintStorage[NODE_VERSION_ACTIVATION_BLOCK];
+  }
+
+  function isNodeVersionCheckExecuted() public view returns(bool) {
+    return boolStorage[NODE_VERSION_CHECK_EXECUTED];
+  }
+
+  /**
+  * Internal function called on cycle end (after _setCurrentCycle), so getCurrentCycleEndBlock() is the
+  * end of the upcoming cycle. The check fires once, on the last cycle boundary before the scheduled
+  * activation block, so outdated validators are excluded from the validator set which is active when
+  * the new spec comes in.
+  */
+  function _checkNodeVersions(address[] memory _validatorSet) internal {
+    uint256 required = uintStorage[REQUIRED_NODE_VERSION];
+    if (required == 0 || boolStorage[NODE_VERSION_CHECK_EXECUTED]) {
+      return;
+    }
+    if (getCurrentCycleEndBlock() < uintStorage[NODE_VERSION_ACTIVATION_BLOCK]) {
+      // the upcoming cycle ends before the upgrade activates - too early to check
+      return;
+    }
+
+    uint256 upgradedCount = 0;
+    for (uint256 i = 0; i < _validatorSet.length; i++) {
+      if (getNodeVersion(_validatorSet[i]) >= required) {
+        upgradedCount++;
+      }
+    }
+
+    bool quorumReached = upgradedCount * 10000 > _validatorSet.length * UPGRADE_QUORUM_BP;
+    if (quorumReached) {
+      for (uint256 i = 0; i < _validatorSet.length; i++) {
+        if (getNodeVersion(_validatorSet[i]) < required) {
+          _jailValidator(_validatorSet[i]);
+        }
+      }
+    }
+    boolStorage[NODE_VERSION_CHECK_EXECUTED] = true;
+    emit NodeVersionCheckExecuted(required, upgradedCount, _validatorSet.length, quorumReached);
+  }
+
   function getCurrentCycleStartBlock() external view returns(uint256) {
     return uintStorage[CURRENT_CYCLE_START_BLOCK];
   }
diff --git a/contracts/Voting.sol b/contracts/Voting.sol
index 2f95289..943fee9 100644
--- a/contracts/Voting.sol
+++ b/contracts/Voting.sol
@@ -29,11 +29,33 @@ contract Voting is VotingUtils {
     require(_proposedValue != address(0));
     require(validContractType(_contractType));
     uint256 ballotId = _createBallot(_startAfterNumberOfCycles, _cyclesDuration, _description);
+    _setBallotType(ballotId, uint256(BallotTypes.ContractAddress));
     _setProposedValue(ballotId, _proposedValue);
     _setContractType(ballotId, _contractType);
     return ballotId;
   }
 
+  /**
+  * @dev Function to create a new ballot for scheduling a network upgrade. If accepted, validators which
+  * have not reported at least the proposed node version get jailed on the last cycle boundary before the
+  * activation block (see Consensus.setRequiredNodeVersion)
+  * @param _startAfterNumberOfCycles number of cycles after which the ballot should open for voting
+  * @param _cyclesDuration number of cycles the ballot will remain open for voting
+  * @param _version minimum required node version (encoded as major * 1e6 + minor * 1e3 + patch). 0 proposes cancelling a scheduled upgrade
+  * @param _activationBlock block at which the new spec activates
+  * @param _description ballot text description
+  */
+  function newNodeVersionBallot(uint256 _startAfterNumberOfCycles, uint256 _cyclesDuration, uint256 _version, uint256 _activationBlock, string calldata _description) external onlyValidVotingKey(msg.sender) onlyValidDuration(_startAfterNumberOfCycles, _cyclesDuration) returns(uint256) {
+    if (_version != 0) {
+      require(_activationBlock > block.number);
+    }
+    uint256 ballotId = _createBallot(_startAfterNumberOfCycles, _cyclesDuration, _description);
+    _setBallotType(ballotId, uint256(BallotTypes.NodeVersion));
+    _setProposedNodeVersion(ballotId, _version);
+    _setProposedActivationBlock(ballotId, _activationBlock);
+    return ballotId;
+  }
+
   /**
   * @dev Function to get specific ballot info along with voters involvment on it
   * @param _id ballot id to get info of
diff --git a/contracts/VotingUtils.sol b/contracts/VotingUtils.sol
index 9660648..e0f24fc 100644
--- a/contracts/VotingUtils.sol
+++ b/contracts/VotingUtils.sol
@@ -136,6 +136,30 @@ abstract contract VotingUtils is EternalStorage, VotingBase {
     uintStorage[keccak256(abi.encodePacked("votingState", _id, "contractType"))] = _value;
   }
 
+  function getBallotType(uint256 _id) public view returns(uint256) {
+    return uintStorage[keccak256(abi.encodePacked("votingState", _id, "ballotType"))];
+  }
+
+  function _setBallotType(uint256 _id, uint256 _value) internal {
+    uintStorage[keccak256(abi.encodePacked("votingState", _id, "ballotType"))] = _value;
+  }
+
+  function getProposedNodeVersion(uint256 _id) public view returns(uint256) {
+    return uintStorage[keccak256(abi.encodePacked("votingState", _id, "proposedNodeVersion"))];
+  }
+
+  function _setProposedNodeVersion(uint256 _id, uint256 _value) internal {
+    uintStorage[keccak256(abi.encodePacked("votingState", _id, "proposedNodeVersion"))] = _value;
+  }
+
+  function getProposedActivationBlock(uint256 _id) public view returns(uint256) {
+    return uintStorage[keccak256(abi.encodePacked("votingState", _id, "proposedActivationBlock"))];
+  }
+
+  function _setProposedActivationBlock(uint256 _id, uint256 _value) internal {
+    uintStorage[keccak256(abi.encodePacked("votingState", _id, "proposedActivationBlock"))] = _value;
+  }
+
   /**
   * @dev This function is used to create a ballot
   * @param _startAfterNumberOfCycles number of cycles after which the ballot should open for voting
@@ -206,6 +230,15 @@ abstract contract VotingUtils is EternalStorage, VotingBase {
   }
 
   function _finalizeBallot(uint256 _id) internal returns(bool) {
+    if (getBallotType(_id) == uint256(BallotTypes.NodeVersion)) {
+      // try/catch so a ballot which can no longer be applied (e.g. stale activation block)
+      // does not revert onCycleEnd, which would break the cycle/reward flow
+      try IConsensus(ProxyStorage(getProxyStorage()).getConsensus()).setRequiredNodeVersion(getProposedNodeVersion(_id), getProposedActivationBlock(_id)) {
+        return true;
+      } catch {
+        return false;
+      }
+    }
     return ProxyStorage(getProxyStorage()).setContractAddress(getContractType(_id), getProposedValue(_id));
   }
 
diff --git a/contracts/abstracts/VotingBase.sol b/contracts/abstracts/VotingBase.sol
index d3d0ee1..eb2f5c5 100644
--- a/contracts/abstracts/VotingBase.sol
+++ b/contracts/abstracts/VotingBase.sol
@@ -30,6 +30,18 @@ abstract contract VotingBase {
     Reject
   }
 
+  /**
+  * @dev Possible ballot types
+  * @param ContractAddress - ballot to change a network contract implementation (see ProxyStorage.ContractTypes)
+  * @param NodeVersion - ballot to schedule a network upgrade (required node version + activation block)
+  * Note: ballots created before ballot types were introduced have type Invalid (0) and are treated as ContractAddress
+  */
+  enum BallotTypes {
+    Invalid,
+    ContractAddress,
+    NodeVersion
+  }
+
   /**
   * @dev This event will be emitted every time a new ballot is created
   * @param id ballot id
diff --git a/contracts/interfaces/IConsensus.sol b/contracts/interfaces/IConsensus.sol
index 68d9098..643f4c0 100644
--- a/contracts/interfaces/IConsensus.sol
+++ b/contracts/interfaces/IConsensus.sol
@@ -12,4 +12,5 @@ interface IConsensus {
     function isFinalized() external view returns(bool);
     function stakeAmount(address _address) external view returns(uint256);
     function totalStakeAmount() external view returns(uint256);
+    function setRequiredNodeVersion(uint256 _version, uint256 _activationBlock) external;
 }
diff --git a/contracts/test/ConsensusMock.sol b/contracts/test/ConsensusMock.sol
index 5bab90c..4350d50 100644
--- a/contracts/test/ConsensusMock.sol
+++ b/contracts/test/ConsensusMock.sol
@@ -91,4 +91,8 @@ contract ConsensusMock is Consensus {
   function setBlockCounterMock(address _val, uint256 counter) public {
     uintStorage[keccak256(abi.encodePacked("blockCounter", _val))] = counter;
   }
+
+  function setRequiredNodeVersionMock(uint256 _version, uint256 _activationBlock) public {
+    _setRequiredNodeVersion(_version, _activationBlock);
+  }
 }
diff --git a/nethermind/quickstart.sh b/nethermind/quickstart.sh
index bb258a4..597b975 100755
--- a/nethermind/quickstart.sh
+++ b/nethermind/quickstart.sh
@@ -621,6 +621,7 @@ EOF
             --net container:$CONTAINER_NAME \
             --volume $KEYSTORE_DIR:/config/keys/FuseNetwork \
             --volume $KEYSTORE_DIR/pass.pwd:/config/pass.pwd \
+            --env NODE_VERSION=$FUSE_CLIENT_DOCKER_IMAGE_VERSION \
             --restart always \
             $VALIDATOR_DOCKER_IMAGE
 
diff --git a/test/consensus.test.js b/test/consensus.test.js
index 5fe9e16..a256897 100644
--- a/test/consensus.test.js
+++ b/test/consensus.test.js
@@ -3366,6 +3366,209 @@ contract("Consensus", async (accounts) => {
     });
   });
 
+  describe("NodeVersion", async () => {
+    const SPEC_VERSION = toBN(6000003); // 6.0.3
+    let candidates;
+
+    beforeEach(async () => {
+      await consensus.initialize(initialValidator);
+      await consensus.setProxyStorage(proxyStorage.address);
+      candidates = [firstCandidate, secondCandidate, thirdCandidate];
+    });
+
+    const stakeAndActivate = async () => {
+      for (let candidate of candidates) {
+        await consensus.sendTransaction({
+          from: candidate,
+          value: MIN_STAKE,
+        }).should.be.fulfilled;
+      }
+      await mockEoC();
+      let currentValidators = await consensus.getValidators();
+      currentValidators.length.should.be.equal(3);
+    };
+
+    const setFullProductivity = async () => {
+      for (let candidate of candidates) {
+        await consensus.setBlockCounterMock(candidate, CYCLE_DURATION_BLOCKS);
+      }
+    };
+
+    const advanceToCycleEnd = async () => {
+      let currentBlockNumber = await web3.eth.getBlockNumber();
+      let currentCycleEndBlock = await consensus.getCurrentCycleEndBlock();
+      let blocksToAdvance =
+        currentCycleEndBlock.toNumber() - currentBlockNumber;
+      if (blocksToAdvance > 0) {
+        await advanceBlocks(blocksToAdvance);
+      }
+      true.should.be.equal(await consensus.hasCycleEnded());
+    };
+
+    it("validators can report their node version", async () => {
+      ZERO.should.be.bignumber.equal(
+        await consensus.getNodeVersion(firstCandidate)
+      );
+      let { logs } = await consensus.reportNodeVersion(SPEC_VERSION, {
+        from: firstCandidate,
+      }).should.be.fulfilled;
+      logs[0].event.should.be.equal("NodeVersionReported");
+      logs[0].args["validator"].should.be.equal(firstCandidate);
+      logs[0].args["version"].should.be.bignumber.equal(SPEC_VERSION);
+      SPEC_VERSION.should.be.bignumber.equal(
+        await consensus.getNodeVersion(firstCandidate)
+      );
+      await consensus
+        .reportNodeVersion(ZERO, { from: firstCandidate })
+        .should.be.rejectedWith(ERROR_MSG);
+    });
+
+    it("scheduling a required node version is only allowed via the voting contract", async () => {
+      let currentBlockNumber = await web3.eth.getBlockNumber();
+      let activationBlock = toBN(currentBlockNumber + 1000);
+      // direct calls are rejected (even from the owner) - scheduling goes through a voting ballot
+      await consensus
+        .setRequiredNodeVersion(SPEC_VERSION, activationBlock, {
+          from: owner,
+        })
+        .should.be.rejectedWith(ERROR_MSG);
+      await consensus
+        .setRequiredNodeVersion(SPEC_VERSION, activationBlock, {
+          from: nonOwner,
+        })
+        .should.be.rejectedWith(ERROR_MSG);
+      // activation block must be in the future
+      await consensus
+        .setRequiredNodeVersionMock(SPEC_VERSION, toBN(currentBlockNumber))
+        .should.be.rejectedWith(ERROR_MSG);
+      await consensus.setRequiredNodeVersionMock(SPEC_VERSION, activationBlock).should.be.fulfilled;
+      SPEC_VERSION.should.be.bignumber.equal(
+        await consensus.getRequiredNodeVersion()
+      );
+      activationBlock.should.be.bignumber.equal(
+        await consensus.getNodeVersionActivationBlock()
+      );
+      false.should.be.equal(await consensus.isNodeVersionCheckExecuted());
+      // clearing a scheduled upgrade
+      await consensus.setRequiredNodeVersionMock(ZERO, ZERO).should.be
+        .fulfilled;
+      ZERO.should.be.bignumber.equal(
+        await consensus.getRequiredNodeVersion()
+      );
+      ZERO.should.be.bignumber.equal(
+        await consensus.getNodeVersionActivationBlock()
+      );
+    });
+
+    it("jails outdated validators on the cycle boundary before activation when more than 66% upgraded", async () => {
+      await stakeAndActivate();
+      // 2 out of 3 validators (66.7% > 66%) report the required version
+      await consensus.reportNodeVersion(SPEC_VERSION, { from: firstCandidate });
+      await consensus.reportNodeVersion(SPEC_VERSION, {
+        from: secondCandidate,
+      });
+
+      // new spec activates in the middle of the upcoming cycle
+      let currentCycleEndBlock = await consensus.getCurrentCycleEndBlock();
+      let activationBlock = currentCycleEndBlock.addn(50);
+      await consensus.setRequiredNodeVersionMock(SPEC_VERSION, activationBlock).should.be.fulfilled;
+
+      await setFullProductivity();
+      await advanceToCycleEnd();
+      await blockReward.cycleMock({ from: owner }).should.be.fulfilled;
+
+      true.should.be.equal(await consensus.isNodeVersionCheckExecuted());
+      true.should.be.equal(await consensus.isJailed(thirdCandidate));
+      false.should.be.equal(await consensus.isPendingValidator(thirdCandidate));
+      false.should.be.equal(await consensus.isJailed(firstCandidate));
+      false.should.be.equal(await consensus.isJailed(secondCandidate));
+      true.should.be.equal(await consensus.isPendingValidator(firstCandidate));
+      true.should.be.equal(await consensus.isPendingValidator(secondCandidate));
+    });
+
+    it("does not jail anybody when the 66% upgrade quorum is not met", async () => {
+      await stakeAndActivate();
+      // only 1 out of 3 validators (33%) reports the required version
+      await consensus.reportNodeVersion(SPEC_VERSION, { from: firstCandidate });
+
+      let currentCycleEndBlock = await consensus.getCurrentCycleEndBlock();
+      let activationBlock = currentCycleEndBlock.addn(50);
+      await consensus.setRequiredNodeVersionMock(SPEC_VERSION, activationBlock).should.be.fulfilled;
+
+      await setFullProductivity();
+      await advanceToCycleEnd();
+      await blockReward.cycleMock({ from: owner }).should.be.fulfilled;
+
+      true.should.be.equal(await consensus.isNodeVersionCheckExecuted());
+      false.should.be.equal(await consensus.isJailed(secondCandidate));
+      false.should.be.equal(await consensus.isJailed(thirdCandidate));
+      true.should.be.equal(await consensus.isPendingValidator(secondCandidate));
+      true.should.be.equal(await consensus.isPendingValidator(thirdCandidate));
+    });
+
+    it("does not run the check before the cycle preceding activation", async () => {
+      await stakeAndActivate();
+      await consensus.reportNodeVersion(SPEC_VERSION, { from: firstCandidate });
+      await consensus.reportNodeVersion(SPEC_VERSION, {
+        from: secondCandidate,
+      });
+
+      // activation is several cycles away
+      let currentCycleEndBlock = await consensus.getCurrentCycleEndBlock();
+      let activationBlock = currentCycleEndBlock.addn(
+        3 * CYCLE_DURATION_BLOCKS
+      );
+      await consensus.setRequiredNodeVersionMock(SPEC_VERSION, activationBlock).should.be.fulfilled;
+
+      await setFullProductivity();
+      await advanceToCycleEnd();
+      await blockReward.cycleMock({ from: owner }).should.be.fulfilled;
+
+      // upcoming cycle still ends before activation - no check yet
+      false.should.be.equal(await consensus.isNodeVersionCheckExecuted());
+      false.should.be.equal(await consensus.isJailed(thirdCandidate));
+
+      // keep cycling until the boundary before activation is reached
+      for (let i = 0; i < 3; i++) {
+        await setFullProductivity();
+        await advanceToCycleEnd();
+        await blockReward.cycleMock({ from: owner }).should.be.fulfilled;
+      }
+
+      true.should.be.equal(await consensus.isNodeVersionCheckExecuted());
+      true.should.be.equal(await consensus.isJailed(thirdCandidate));
+      false.should.be.equal(await consensus.isJailed(firstCandidate));
+      false.should.be.equal(await consensus.isJailed(secondCandidate));
+    });
+
+    it("outdated validator can only be released from jail after reporting the required version", async () => {
+      await stakeAndActivate();
+      await consensus.reportNodeVersion(SPEC_VERSION, { from: firstCandidate });
+      await consensus.reportNodeVersion(SPEC_VERSION, {
+        from: secondCandidate,
+      });
+
+      let currentCycleEndBlock = await consensus.getCurrentCycleEndBlock();
+      let activationBlock = currentCycleEndBlock.addn(50);
+      await consensus.setRequiredNodeVersionMock(SPEC_VERSION, activationBlock).should.be.fulfilled;
+
+      await setFullProductivity();
+      await advanceToCycleEnd();
+      await blockReward.cycleMock({ from: owner }).should.be.fulfilled;
+      true.should.be.equal(await consensus.isJailed(thirdCandidate));
+
+      // release block has passed, but the validator has not upgraded yet
+      await consensus
+        .unJail({ from: thirdCandidate })
+        .should.be.rejectedWith(ERROR_MSG);
+
+      await consensus.reportNodeVersion(SPEC_VERSION, { from: thirdCandidate });
+      await consensus.unJail({ from: thirdCandidate }).should.be.fulfilled;
+      false.should.be.equal(await consensus.isJailed(thirdCandidate));
+      true.should.be.equal(await consensus.isPendingValidator(thirdCandidate));
+    });
+  });
+
   describe("upgradeTo", async () => {
     let consensusOldImplementation, consensusNew;
     let proxyStorageStub = accounts[3];
diff --git a/test/voting.test.js b/test/voting.test.js
index 70d1c36..178a95b 100644
--- a/test/voting.test.js
+++ b/test/voting.test.js
@@ -301,6 +301,176 @@ contract("Voting", async (accounts) => {
     });
   });
 
+  describe("newNodeVersionBallot", async () => {
+    const SPEC_VERSION = toBN(6000003); // 6.0.3
+    const BALLOT_TYPES = { INVALID: 0, CONTRACT_ADDRESS: 1, NODE_VERSION: 2 };
+
+    beforeEach(async () => {
+      await voting.initialize().should.be.fulfilled;
+      voteStartAfterNumberOfCycles = 1;
+      voteCyclesDuration = 2;
+    });
+
+    const newNodeVersionBallot = async (version, activationBlock, from) => {
+      let id = await voting.getNextBallotId();
+      await voting.newNodeVersionBallot(
+        voteStartAfterNumberOfCycles,
+        voteCyclesDuration,
+        version,
+        activationBlock,
+        "network upgrade",
+        { from }
+      ).should.be.fulfilled;
+      return id;
+    };
+
+    const voteAndFinalize = async (id, choices) => {
+      let currentValidators = await consensus.getValidators();
+      let currentBlock = toBN(await web3.eth.getBlockNumber());
+      let voteStartBlock = await voting.getStartBlock(id);
+      await advanceBlocks(voteStartBlock.sub(currentBlock).toNumber() + 1);
+      for (let [validator, choice] of choices) {
+        await voting.vote(id, choice, { from: validator }).should.be.fulfilled;
+      }
+      currentBlock = toBN(await web3.eth.getBlockNumber());
+      let voteEndBlock = await voting.getEndBlock(id);
+      await advanceBlocks(voteEndBlock.sub(currentBlock).add(toBN(1)).toNumber());
+      await voting.setConsensusMock(owner);
+      await voting.onCycleEnd(currentValidators).should.be.fulfilled;
+    };
+
+    it("should be successful", async () => {
+      let currentBlock = toBN(await web3.eth.getBlockNumber());
+      let activationBlock = currentBlock.addn(10000);
+      let id = await newNodeVersionBallot(
+        SPEC_VERSION,
+        activationBlock,
+        validators[0]
+      );
+      toBN(BALLOT_TYPES.NODE_VERSION).should.be.bignumber.equal(
+        await voting.getBallotType(id)
+      );
+      SPEC_VERSION.should.be.bignumber.equal(
+        await voting.getProposedNodeVersion(id)
+      );
+      activationBlock.should.be.bignumber.equal(
+        await voting.getProposedActivationBlock(id)
+      );
+    });
+
+    it("should fail if not called by valid voting key", async () => {
+      let currentBlock = toBN(await web3.eth.getBlockNumber());
+      await voting
+        .newNodeVersionBallot(
+          voteStartAfterNumberOfCycles,
+          voteCyclesDuration,
+          SPEC_VERSION,
+          currentBlock.addn(10000),
+          "network upgrade",
+          { from: owner }
+        )
+        .should.be.rejectedWith(ERROR_MSG);
+    });
+
+    it("should fail if activation block is not in the future", async () => {
+      let currentBlock = toBN(await web3.eth.getBlockNumber());
+      await voting
+        .newNodeVersionBallot(
+          voteStartAfterNumberOfCycles,
+          voteCyclesDuration,
+          SPEC_VERSION,
+          currentBlock,
+          "network upgrade",
+          { from: validators[0] }
+        )
+        .should.be.rejectedWith(ERROR_MSG);
+    });
+
+    it("accepted ballot should set the required node version on consensus", async () => {
+      let currentBlock = toBN(await web3.eth.getBlockNumber());
+      let activationBlock = currentBlock.addn(10000);
+      let id = await newNodeVersionBallot(
+        SPEC_VERSION,
+        activationBlock,
+        validators[0]
+      );
+      await voteAndFinalize(id, [
+        [validators[0], ACTION_CHOICES.ACCEPT],
+        [validators[1], ACTION_CHOICES.ACCEPT],
+        [validators[2], ACTION_CHOICES.REJECT],
+      ]);
+      true.should.be.equal(await voting.getIsFinalized(id));
+      toBN(QUORUM_STATES.ACCEPTED).should.be.bignumber.equal(
+        await voting.getQuorumState(id)
+      );
+      SPEC_VERSION.should.be.bignumber.equal(
+        await consensus.getRequiredNodeVersion()
+      );
+      activationBlock.should.be.bignumber.equal(
+        await consensus.getNodeVersionActivationBlock()
+      );
+    });
+
+    it("rejected ballot should not set the required node version on consensus", async () => {
+      let currentBlock = toBN(await web3.eth.getBlockNumber());
+      let id = await newNodeVersionBallot(
+        SPEC_VERSION,
+        currentBlock.addn(10000),
+        validators[0]
+      );
+      await voteAndFinalize(id, [
+        [validators[0], ACTION_CHOICES.ACCEPT],
+        [validators[1], ACTION_CHOICES.REJECT],
+        [validators[2], ACTION_CHOICES.REJECT],
+      ]);
+      true.should.be.equal(await voting.getIsFinalized(id));
+      toBN(QUORUM_STATES.REJECTED).should.be.bignumber.equal(
+        await voting.getQuorumState(id)
+      );
+      toBN(0).should.be.bignumber.equal(
+        await consensus.getRequiredNodeVersion()
+      );
+    });
+
+    it("ballot below turnout should not set the required node version on consensus", async () => {
+      let currentBlock = toBN(await web3.eth.getBlockNumber());
+      let id = await newNodeVersionBallot(
+        SPEC_VERSION,
+        currentBlock.addn(10000),
+        validators[0]
+      );
+      // only 1 of 8 validators votes (12.5% < 20% turnout)
+      await voteAndFinalize(id, [[validators[0], ACTION_CHOICES.ACCEPT]]);
+      true.should.be.equal(await voting.getIsFinalized(id));
+      toBN(QUORUM_STATES.REJECTED).should.be.bignumber.equal(
+        await voting.getQuorumState(id)
+      );
+      true.should.be.equal(await voting.getBelowTurnOut(id));
+      toBN(0).should.be.bignumber.equal(
+        await consensus.getRequiredNodeVersion()
+      );
+    });
+
+    it("accepted ballot with stale activation block should not revert onCycleEnd", async () => {
+      let currentBlock = toBN(await web3.eth.getBlockNumber());
+      // activation block passes before the ballot can be finalized (start + duration is ~3 cycles away)
+      let id = await newNodeVersionBallot(
+        SPEC_VERSION,
+        currentBlock.addn(10),
+        validators[0]
+      );
+      await voteAndFinalize(id, [
+        [validators[0], ACTION_CHOICES.ACCEPT],
+        [validators[1], ACTION_CHOICES.ACCEPT],
+      ]);
+      // the consensus call failed gracefully - ballot is left unfinalized and nothing was scheduled
+      false.should.be.equal(await voting.getIsFinalized(id));
+      toBN(0).should.be.bignumber.equal(
+        await consensus.getRequiredNodeVersion()
+      );
+    });
+  });
+
   describe("vote", async () => {
     let id, proposedValue, contractType;
     beforeEach(async () => {