Merge branch 'master' of github.com:0xProject/0x.js

# Conflicts:
#	src/ts/0x.js.ts
#	src/ts/utils/utils.ts

15 files changed, 3199 insertions, 25 deletions

diff --git a/src/artifacts/EtherToken.json b/src/artifacts/EtherToken.json
new file mode 100644
index 000000000..0593cdc95
--- /dev/null
+++ b/src/artifacts/EtherToken.json
@@ -0,0 +1,339 @@
+{
+  "contract_name": "EtherToken",
+  "abi": [
+    {
+      "constant": true,
+      "inputs": [],
+      "name": "name",
+      "outputs": [
+        {
+          "name": "",
+          "type": "string"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "_spender",
+          "type": "address"
+        },
+        {
+          "name": "_value",
+          "type": "uint256"
+        }
+      ],
+      "name": "approve",
+      "outputs": [
+        {
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [],
+      "name": "totalSupply",
+      "outputs": [
+        {
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "_from",
+          "type": "address"
+        },
+        {
+          "name": "_to",
+          "type": "address"
+        },
+        {
+          "name": "_value",
+          "type": "uint256"
+        }
+      ],
+      "name": "transferFrom",
+      "outputs": [
+        {
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "amount",
+          "type": "uint256"
+        }
+      ],
+      "name": "withdraw",
+      "outputs": [],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [],
+      "name": "decimals",
+      "outputs": [
+        {
+          "name": "",
+          "type": "uint8"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [
+        {
+          "name": "_owner",
+          "type": "address"
+        }
+      ],
+      "name": "balanceOf",
+      "outputs": [
+        {
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [],
+      "name": "symbol",
+      "outputs": [
+        {
+          "name": "",
+          "type": "string"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "_to",
+          "type": "address"
+        },
+        {
+          "name": "_value",
+          "type": "uint256"
+        }
+      ],
+      "name": "transfer",
+      "outputs": [
+        {
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": false,
+      "inputs": [],
+      "name": "deposit",
+      "outputs": [],
+      "payable": true,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [
+        {
+          "name": "_owner",
+          "type": "address"
+        },
+        {
+          "name": "_spender",
+          "type": "address"
+        }
+      ],
+      "name": "allowance",
+      "outputs": [
+        {
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "name": "_from",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "name": "_to",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "name": "_value",
+          "type": "uint256"
+        }
+      ],
+      "name": "Transfer",
+      "type": "event"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "name": "_owner",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "name": "_spender",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "name": "_value",
+          "type": "uint256"
+        }
+      ],
+      "name": "Approval",
+      "type": "event"
+    }
+  ],
+  "unlinked_binary": "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",
+  "networks": {
+    "42": {
+      "links": {},
+      "events": {
+        "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": true,
+              "name": "_from",
+              "type": "address"
+            },
+            {
+              "indexed": true,
+              "name": "_to",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "name": "_value",
+              "type": "uint256"
+            }
+          ],
+          "name": "Transfer",
+          "type": "event"
+        },
+        "0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": true,
+              "name": "_owner",
+              "type": "address"
+            },
+            {
+              "indexed": true,
+              "name": "_spender",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "name": "_value",
+              "type": "uint256"
+            }
+          ],
+          "name": "Approval",
+          "type": "event"
+        }
+      },
+      "updated_at": 1495042008609,
+      "address": "0xd5cbb5c0d14718a844b1e4cd141878a0e2a71760"
+    },
+    "50": {
+      "links": {},
+      "events": {
+        "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": true,
+              "name": "_from",
+              "type": "address"
+            },
+            {
+              "indexed": true,
+              "name": "_to",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "name": "_value",
+              "type": "uint256"
+            }
+          ],
+          "name": "Transfer",
+          "type": "event"
+        },
+        "0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": true,
+              "name": "_owner",
+              "type": "address"
+            },
+            {
+              "indexed": true,
+              "name": "_spender",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "name": "_value",
+              "type": "uint256"
+            }
+          ],
+          "name": "Approval",
+          "type": "event"
+        }
+      },
+      "updated_at": 1495030736786,
+      "address": "0x48bacb9266a570d521063ef5dd96e61686dbe788"
+    }
+  },
+  "schema_version": "0.0.5",
+  "updated_at": 1495042008609
+}
\ No newline at end of file
diff --git a/src/artifacts/Exchange.json b/src/artifacts/Exchange.json
new file mode 100644
index 000000000..2c02bda11
--- /dev/null
+++ b/src/artifacts/Exchange.json
@@ -0,0 +1,985 @@
+{
+  "contract_name": "Exchange",
+  "abi": [
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "orderAddresses",
+          "type": "address[5]"
+        },
+        {
+          "name": "orderValues",
+          "type": "uint256[6]"
+        },
+        {
+          "name": "cancelValueT",
+          "type": "uint256"
+        }
+      ],
+      "name": "cancel",
+      "outputs": [
+        {
+          "name": "cancelledValueT",
+          "type": "uint256"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [
+        {
+          "name": "denominator",
+          "type": "uint256"
+        },
+        {
+          "name": "numerator",
+          "type": "uint256"
+        },
+        {
+          "name": "target",
+          "type": "uint256"
+        }
+      ],
+      "name": "isRoundingError",
+      "outputs": [
+        {
+          "name": "isError",
+          "type": "bool"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [
+        {
+          "name": "",
+          "type": "bytes32"
+        }
+      ],
+      "name": "filled",
+      "outputs": [
+        {
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [
+        {
+          "name": "",
+          "type": "bytes32"
+        }
+      ],
+      "name": "cancelled",
+      "outputs": [
+        {
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [
+        {
+          "name": "value",
+          "type": "uint256"
+        },
+        {
+          "name": "fillValue",
+          "type": "uint256"
+        },
+        {
+          "name": "target",
+          "type": "uint256"
+        }
+      ],
+      "name": "getPartialValue",
+      "outputs": [
+        {
+          "name": "partialValue",
+          "type": "uint256"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "orderAddresses",
+          "type": "address[5][]"
+        },
+        {
+          "name": "orderValues",
+          "type": "uint256[6][]"
+        },
+        {
+          "name": "cancelValuesT",
+          "type": "uint256[]"
+        }
+      ],
+      "name": "batchCancel",
+      "outputs": [
+        {
+          "name": "success",
+          "type": "bool"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "orderAddresses",
+          "type": "address[5][]"
+        },
+        {
+          "name": "orderValues",
+          "type": "uint256[6][]"
+        },
+        {
+          "name": "fillValueT",
+          "type": "uint256"
+        },
+        {
+          "name": "shouldCheckTransfer",
+          "type": "bool"
+        },
+        {
+          "name": "v",
+          "type": "uint8[]"
+        },
+        {
+          "name": "r",
+          "type": "bytes32[]"
+        },
+        {
+          "name": "s",
+          "type": "bytes32[]"
+        }
+      ],
+      "name": "fillUpTo",
+      "outputs": [
+        {
+          "name": "filledValueT",
+          "type": "uint256"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [
+        {
+          "name": "a",
+          "type": "uint256"
+        },
+        {
+          "name": "b",
+          "type": "uint256"
+        }
+      ],
+      "name": "min",
+      "outputs": [
+        {
+          "name": "min",
+          "type": "uint256"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [
+        {
+          "name": "pubKey",
+          "type": "address"
+        },
+        {
+          "name": "hash",
+          "type": "bytes32"
+        },
+        {
+          "name": "v",
+          "type": "uint8"
+        },
+        {
+          "name": "r",
+          "type": "bytes32"
+        },
+        {
+          "name": "s",
+          "type": "bytes32"
+        }
+      ],
+      "name": "isValidSignature",
+      "outputs": [
+        {
+          "name": "isValid",
+          "type": "bool"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "orderAddresses",
+          "type": "address[5]"
+        },
+        {
+          "name": "orderValues",
+          "type": "uint256[6]"
+        },
+        {
+          "name": "fillValueT",
+          "type": "uint256"
+        },
+        {
+          "name": "shouldCheckTransfer",
+          "type": "bool"
+        },
+        {
+          "name": "v",
+          "type": "uint8"
+        },
+        {
+          "name": "r",
+          "type": "bytes32"
+        },
+        {
+          "name": "s",
+          "type": "bytes32"
+        }
+      ],
+      "name": "fill",
+      "outputs": [
+        {
+          "name": "filledValueT",
+          "type": "uint256"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "orderAddresses",
+          "type": "address[5][]"
+        },
+        {
+          "name": "orderValues",
+          "type": "uint256[6][]"
+        },
+        {
+          "name": "fillValuesT",
+          "type": "uint256[]"
+        },
+        {
+          "name": "shouldCheckTransfer",
+          "type": "bool"
+        },
+        {
+          "name": "v",
+          "type": "uint8[]"
+        },
+        {
+          "name": "r",
+          "type": "bytes32[]"
+        },
+        {
+          "name": "s",
+          "type": "bytes32[]"
+        }
+      ],
+      "name": "batchFill",
+      "outputs": [
+        {
+          "name": "success",
+          "type": "bool"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "orderAddresses",
+          "type": "address[5][]"
+        },
+        {
+          "name": "orderValues",
+          "type": "uint256[6][]"
+        },
+        {
+          "name": "fillValuesT",
+          "type": "uint256[]"
+        },
+        {
+          "name": "v",
+          "type": "uint8[]"
+        },
+        {
+          "name": "r",
+          "type": "bytes32[]"
+        },
+        {
+          "name": "s",
+          "type": "bytes32[]"
+        }
+      ],
+      "name": "batchFillOrKill",
+      "outputs": [
+        {
+          "name": "success",
+          "type": "bool"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [],
+      "name": "PROXY",
+      "outputs": [
+        {
+          "name": "",
+          "type": "address"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [
+        {
+          "name": "orderHash",
+          "type": "bytes32"
+        }
+      ],
+      "name": "getUnavailableValueT",
+      "outputs": [
+        {
+          "name": "unavailableValueT",
+          "type": "uint256"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [
+        {
+          "name": "orderAddresses",
+          "type": "address[5]"
+        },
+        {
+          "name": "orderValues",
+          "type": "uint256[6]"
+        }
+      ],
+      "name": "getOrderHash",
+      "outputs": [
+        {
+          "name": "orderHash",
+          "type": "bytes32"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [],
+      "name": "ZRX",
+      "outputs": [
+        {
+          "name": "",
+          "type": "address"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "orderAddresses",
+          "type": "address[5]"
+        },
+        {
+          "name": "orderValues",
+          "type": "uint256[6]"
+        },
+        {
+          "name": "fillValueT",
+          "type": "uint256"
+        },
+        {
+          "name": "v",
+          "type": "uint8"
+        },
+        {
+          "name": "r",
+          "type": "bytes32"
+        },
+        {
+          "name": "s",
+          "type": "bytes32"
+        }
+      ],
+      "name": "fillOrKill",
+      "outputs": [
+        {
+          "name": "success",
+          "type": "bool"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "name": "_zrx",
+          "type": "address"
+        },
+        {
+          "name": "_proxy",
+          "type": "address"
+        }
+      ],
+      "payable": false,
+      "type": "constructor"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "name": "maker",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "name": "taker",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "name": "feeRecipient",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "name": "tokenM",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "name": "tokenT",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "name": "filledBy",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "name": "valueM",
+          "type": "uint256"
+        },
+        {
+          "indexed": false,
+          "name": "valueT",
+          "type": "uint256"
+        },
+        {
+          "indexed": false,
+          "name": "feeM",
+          "type": "uint256"
+        },
+        {
+          "indexed": false,
+          "name": "feeT",
+          "type": "uint256"
+        },
+        {
+          "indexed": false,
+          "name": "expiration",
+          "type": "uint256"
+        },
+        {
+          "indexed": false,
+          "name": "filledValueT",
+          "type": "uint256"
+        },
+        {
+          "indexed": true,
+          "name": "tokens",
+          "type": "bytes32"
+        },
+        {
+          "indexed": false,
+          "name": "orderHash",
+          "type": "bytes32"
+        }
+      ],
+      "name": "LogFill",
+      "type": "event"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "name": "maker",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "name": "feeRecipient",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "name": "tokenM",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "name": "tokenT",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "name": "valueM",
+          "type": "uint256"
+        },
+        {
+          "indexed": false,
+          "name": "valueT",
+          "type": "uint256"
+        },
+        {
+          "indexed": false,
+          "name": "feeM",
+          "type": "uint256"
+        },
+        {
+          "indexed": false,
+          "name": "feeT",
+          "type": "uint256"
+        },
+        {
+          "indexed": false,
+          "name": "expiration",
+          "type": "uint256"
+        },
+        {
+          "indexed": false,
+          "name": "cancelledValueT",
+          "type": "uint256"
+        },
+        {
+          "indexed": true,
+          "name": "tokens",
+          "type": "bytes32"
+        },
+        {
+          "indexed": false,
+          "name": "orderHash",
+          "type": "bytes32"
+        }
+      ],
+      "name": "LogCancel",
+      "type": "event"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "name": "errorId",
+          "type": "uint8"
+        },
+        {
+          "indexed": true,
+          "name": "orderHash",
+          "type": "bytes32"
+        }
+      ],
+      "name": "LogError",
+      "type": "event"
+    }
+  ],
+  "unlinked_binary": 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+      },
+      "updated_at": 1495042008606,
+      "address": "0x9ce1a5e2311f9b8b8e6b40ed20b5b090de4a4c4d"
+    },
+    "50": {
+      "links": {},
+      "events": {
+        "0xcf8bd4f6ec4f39997290cf18413805f1f190eebd60e32ffc174b56d07a355beb": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": true,
+              "name": "maker",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "name": "taker",
+              "type": "address"
+            },
+            {
+              "indexed": true,
+              "name": "feeRecipient",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "name": "tokenM",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "name": "tokenT",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "name": "filledBy",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "name": "valueM",
+              "type": "uint256"
+            },
+            {
+              "indexed": false,
+              "name": "valueT",
+              "type": "uint256"
+            },
+            {
+              "indexed": false,
+              "name": "feeM",
+              "type": "uint256"
+            },
+            {
+              "indexed": false,
+              "name": "feeT",
+              "type": "uint256"
+            },
+            {
+              "indexed": false,
+              "name": "expiration",
+              "type": "uint256"
+            },
+            {
+              "indexed": false,
+              "name": "filledValueT",
+              "type": "uint256"
+            },
+            {
+              "indexed": true,
+              "name": "tokens",
+              "type": "bytes32"
+            },
+            {
+              "indexed": false,
+              "name": "orderHash",
+              "type": "bytes32"
+            }
+          ],
+          "name": "LogFill",
+          "type": "event"
+        },
+        "0x4565177cd5184f550db0ab57b1d5bc808f8e8ba0adcb13fb257f1e7cf019a2b6": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": true,
+              "name": "maker",
+              "type": "address"
+            },
+            {
+              "indexed": true,
+              "name": "feeRecipient",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "name": "tokenM",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "name": "tokenT",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "name": "valueM",
+              "type": "uint256"
+            },
+            {
+              "indexed": false,
+              "name": "valueT",
+              "type": "uint256"
+            },
+            {
+              "indexed": false,
+              "name": "feeM",
+              "type": "uint256"
+            },
+            {
+              "indexed": false,
+              "name": "feeT",
+              "type": "uint256"
+            },
+            {
+              "indexed": false,
+              "name": "expiration",
+              "type": "uint256"
+            },
+            {
+              "indexed": false,
+              "name": "cancelledValueT",
+              "type": "uint256"
+            },
+            {
+              "indexed": true,
+              "name": "tokens",
+              "type": "bytes32"
+            },
+            {
+              "indexed": false,
+              "name": "orderHash",
+              "type": "bytes32"
+            }
+          ],
+          "name": "LogCancel",
+          "type": "event"
+        },
+        "0x36d86c59e00bd73dc19ba3adfe068e4b64ac7e92be35546adeddf1b956a87e90": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": true,
+              "name": "errorId",
+              "type": "uint8"
+            },
+            {
+              "indexed": true,
+              "name": "orderHash",
+              "type": "bytes32"
+            }
+          ],
+          "name": "LogError",
+          "type": "event"
+        }
+      },
+      "updated_at": 1495030736784,
+      "address": "0xb69e673309512a9d726f87304c6984054f87a93b"
+    }
+  },
+  "schema_version": "0.0.5",
+  "updated_at": 1495042008606
+}
diff --git a/src/artifacts/Mintable.json b/src/artifacts/Mintable.json
new file mode 100644
index 000000000..026f294f2
--- /dev/null
+++ b/src/artifacts/Mintable.json
@@ -0,0 +1,189 @@
+{
+  "contract_name": "Mintable",
+  "abi": [
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "_spender",
+          "type": "address"
+        },
+        {
+          "name": "_value",
+          "type": "uint256"
+        }
+      ],
+      "name": "approve",
+      "outputs": [
+        {
+          "name": "success",
+          "type": "bool"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [],
+      "name": "totalSupply",
+      "outputs": [
+        {
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "_from",
+          "type": "address"
+        },
+        {
+          "name": "_to",
+          "type": "address"
+        },
+        {
+          "name": "_value",
+          "type": "uint256"
+        }
+      ],
+      "name": "transferFrom",
+      "outputs": [
+        {
+          "name": "success",
+          "type": "bool"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [
+        {
+          "name": "_owner",
+          "type": "address"
+        }
+      ],
+      "name": "balanceOf",
+      "outputs": [
+        {
+          "name": "balance",
+          "type": "uint256"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "_value",
+          "type": "uint256"
+        }
+      ],
+      "name": "mint",
+      "outputs": [],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "_to",
+          "type": "address"
+        },
+        {
+          "name": "_value",
+          "type": "uint256"
+        }
+      ],
+      "name": "transfer",
+      "outputs": [
+        {
+          "name": "success",
+          "type": "bool"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [
+        {
+          "name": "_owner",
+          "type": "address"
+        },
+        {
+          "name": "_spender",
+          "type": "address"
+        }
+      ],
+      "name": "allowance",
+      "outputs": [
+        {
+          "name": "remaining",
+          "type": "uint256"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "name": "_from",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "name": "_to",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "name": "_value",
+          "type": "uint256"
+        }
+      ],
+      "name": "Transfer",
+      "type": "event"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "name": "_owner",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "name": "_spender",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "name": "_value",
+          "type": "uint256"
+        }
+      ],
+      "name": "Approval",
+      "type": "event"
+    }
+  ],
+  "unlinked_binary": "0x606060405234610000575b6104e7806100196000396000f300606060405236156100675763ffffffff60e060020a600035041663095ea7b3811461006c57806318160ddd1461009c57806323b872dd146100bb57806370a08231146100f1578063a0712d681461011c578063a9059cbb1461012e578063dd62ed3e1461015e575b610000565b3461000057610088600160a060020a036004351660243561018f565b604080519115158252519081900360200190f35b34610000576100a96101fa565b60408051918252519081900360200190f35b3461000057610088600160a060020a0360043581169060243516604435610200565b604080519115158252519081900360200190f35b34610000576100a9600160a060020a036004351661030d565b60408051918252519081900360200190f35b346100005761012c60043561032c565b005b3461000057610088600160a060020a0360043516602435610393565b604080519115158252519081900360200190f35b34610000576100a9600160a060020a0360043581169060243516610456565b60408051918252519081900360200190f35b600160a060020a03338116600081815260016020908152604080832094871680845294825280832086905580518681529051929493927f8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925929181900390910190a35060015b92915050565b60025481565b600160a060020a0383166000908152602081905260408120548290108015906102505750600160a060020a0380851660009081526001602090815260408083203390941683529290522054829010155b80156102755750600160a060020a038316600090815260208190526040902054828101115b1561030157600160a060020a0380841660008181526020818152604080832080548801905588851680845281842080548990039055600183528184203390961684529482529182902080548790039055815186815291519293927fddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef9281900390910190a3506001610305565b5060005b5b9392505050565b600160a060020a0381166000908152602081905260409020545b919050565b68056bc75e2d6310000081111561034257610000565b600160a060020a033316600090815260208190526040902054610366908290610483565b600160a060020a03331660009081526020819052604090205560025461038c9082610483565b6002555b50565b600160a060020a0333166000908152602081905260408120548290108015906103d55750600160a060020a038316600090815260208190526040902054828101115b1561044757600160a060020a0333811660008181526020818152604080832080548890039055938716808352918490208054870190558351868152935191937fddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef929081900390910190a35060016101f4565b5060006101f4565b5b92915050565b600160a060020a038083166000908152600160209081526040808320938516835292905220545b92915050565b60008282016104a084821080159061049b5750838210155b6104ab565b8091505b5092915050565b80151561039057610000565b5b505600a165627a7a72305820cf19b2935b2a852369d6ff6508a8c5c3b184b660a7d117af9fd1c7224bdb1d2f0029",
+  "networks": {},
+  "schema_version": "0.0.5",
+  "updated_at": 1495030728122
+}
\ No newline at end of file
diff --git a/src/artifacts/Proxy.json b/src/artifacts/Proxy.json
new file mode 100644
index 000000000..0d6faef35
--- /dev/null
+++ b/src/artifacts/Proxy.json
@@ -0,0 +1,267 @@
+{
+  "contract_name": "Proxy",
+  "abi": [
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "token",
+          "type": "address"
+        },
+        {
+          "name": "from",
+          "type": "address"
+        },
+        {
+          "name": "to",
+          "type": "address"
+        },
+        {
+          "name": "value",
+          "type": "uint256"
+        }
+      ],
+      "name": "transferFrom",
+      "outputs": [
+        {
+          "name": "success",
+          "type": "bool"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "target",
+          "type": "address"
+        }
+      ],
+      "name": "addAuthorizedAddress",
+      "outputs": [
+        {
+          "name": "success",
+          "type": "bool"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [
+        {
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "name": "authorities",
+      "outputs": [
+        {
+          "name": "",
+          "type": "address"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "target",
+          "type": "address"
+        }
+      ],
+      "name": "removeAuthorizedAddress",
+      "outputs": [
+        {
+          "name": "success",
+          "type": "bool"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [],
+      "name": "owner",
+      "outputs": [
+        {
+          "name": "",
+          "type": "address"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [
+        {
+          "name": "",
+          "type": "address"
+        }
+      ],
+      "name": "authorized",
+      "outputs": [
+        {
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [],
+      "name": "getAuthorizedAddresses",
+      "outputs": [
+        {
+          "name": "",
+          "type": "address[]"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "newOwner",
+          "type": "address"
+        }
+      ],
+      "name": "transferOwnership",
+      "outputs": [],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "name": "target",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "name": "caller",
+          "type": "address"
+        }
+      ],
+      "name": "LogAuthorizedAddressAdded",
+      "type": "event"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "name": "target",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "name": "caller",
+          "type": "address"
+        }
+      ],
+      "name": "LogAuthorizedAddressRemoved",
+      "type": "event"
+    }
+  ],
+  "unlinked_binary": "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",
+  "networks": {
+    "42": {
+      "links": {},
+      "events": {
+        "0x94bb87f4c15c4587ff559a7584006fa01ddf9299359be6b512b94527aa961aca": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": true,
+              "name": "target",
+              "type": "address"
+            },
+            {
+              "indexed": true,
+              "name": "caller",
+              "type": "address"
+            }
+          ],
+          "name": "LogAuthorizedAddressAdded",
+          "type": "event"
+        },
+        "0xf5b347a1e40749dd050f5f07fbdbeb7e3efa9756903044dd29401fd1d4bb4a1c": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": true,
+              "name": "target",
+              "type": "address"
+            },
+            {
+              "indexed": true,
+              "name": "caller",
+              "type": "address"
+            }
+          ],
+          "name": "LogAuthorizedAddressRemoved",
+          "type": "event"
+        }
+      },
+      "updated_at": 1495042008598,
+      "address": "0x72a2820f45b3e977897a63f2a726c21754f3730d"
+    },
+    "50": {
+      "links": {},
+      "events": {
+        "0x94bb87f4c15c4587ff559a7584006fa01ddf9299359be6b512b94527aa961aca": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": true,
+              "name": "target",
+              "type": "address"
+            },
+            {
+              "indexed": true,
+              "name": "caller",
+              "type": "address"
+            }
+          ],
+          "name": "LogAuthorizedAddressAdded",
+          "type": "event"
+        },
+        "0xf5b347a1e40749dd050f5f07fbdbeb7e3efa9756903044dd29401fd1d4bb4a1c": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": true,
+              "name": "target",
+              "type": "address"
+            },
+            {
+              "indexed": true,
+              "name": "caller",
+              "type": "address"
+            }
+          ],
+          "name": "LogAuthorizedAddressRemoved",
+          "type": "event"
+        }
+      },
+      "updated_at": 1495030736781,
+      "address": "0x871dd7c2b4b25e1aa18728e9d5f2af4c4e431f5c"
+    }
+  },
+  "schema_version": "0.0.5",
+  "updated_at": 1495042008598
+}
\ No newline at end of file
diff --git a/src/artifacts/Token.json b/src/artifacts/Token.json
new file mode 100644
index 000000000..3bbcead41
--- /dev/null
+++ b/src/artifacts/Token.json
@@ -0,0 +1,176 @@
+{
+  "contract_name": "Token",
+  "abi": [
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "_spender",
+          "type": "address"
+        },
+        {
+          "name": "_value",
+          "type": "uint256"
+        }
+      ],
+      "name": "approve",
+      "outputs": [
+        {
+          "name": "success",
+          "type": "bool"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [],
+      "name": "totalSupply",
+      "outputs": [
+        {
+          "name": "supply",
+          "type": "uint256"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "_from",
+          "type": "address"
+        },
+        {
+          "name": "_to",
+          "type": "address"
+        },
+        {
+          "name": "_value",
+          "type": "uint256"
+        }
+      ],
+      "name": "transferFrom",
+      "outputs": [
+        {
+          "name": "success",
+          "type": "bool"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [
+        {
+          "name": "_owner",
+          "type": "address"
+        }
+      ],
+      "name": "balanceOf",
+      "outputs": [
+        {
+          "name": "balance",
+          "type": "uint256"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "_to",
+          "type": "address"
+        },
+        {
+          "name": "_value",
+          "type": "uint256"
+        }
+      ],
+      "name": "transfer",
+      "outputs": [
+        {
+          "name": "success",
+          "type": "bool"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [
+        {
+          "name": "_owner",
+          "type": "address"
+        },
+        {
+          "name": "_spender",
+          "type": "address"
+        }
+      ],
+      "name": "allowance",
+      "outputs": [
+        {
+          "name": "remaining",
+          "type": "uint256"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "name": "_from",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "name": "_to",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "name": "_value",
+          "type": "uint256"
+        }
+      ],
+      "name": "Transfer",
+      "type": "event"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "name": "_owner",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "name": "_spender",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "name": "_value",
+          "type": "uint256"
+        }
+      ],
+      "name": "Approval",
+      "type": "event"
+    }
+  ],
+  "unlinked_binary": "0x606060405234610000575b6101d1806100196000396000f3006060604052361561005c5763ffffffff60e060020a600035041663095ea7b3811461006157806318160ddd1461009157806323b872dd146100b057806370a08231146100e6578063a9059cbb14610061578063dd62ed3e14610141575b610000565b346100005761007d600160a060020a0360043516602435610172565b604080519115158252519081900360200190f35b346100005761009e61017b565b60408051918252519081900360200190f35b346100005761007d600160a060020a0360043581169060243516604435610181565b604080519115158252519081900360200190f35b346100005761009e600160a060020a036004351661018b565b60408051918252519081900360200190f35b346100005761007d600160a060020a0360043516602435610172565b604080519115158252519081900360200190f35b346100005761009e600160a060020a0360043581169060243516610172565b60408051918252519081900360200190f35b60005b92915050565b60005b90565b60005b9392505050565b60005b919050565b60005b92915050565b60005b929150505600a165627a7a7230582031ad84562e693d05c7c6f36cc87a07055903923d08faf214a07c4e7c3b2d4a8f0029",
+  "networks": {},
+  "schema_version": "0.0.5",
+  "updated_at": 1495030728125
+}
\ No newline at end of file
diff --git a/src/artifacts/TokenRegistry.json b/src/artifacts/TokenRegistry.json
new file mode 100644
index 000000000..f9f4fafbc
--- /dev/null
+++ b/src/artifacts/TokenRegistry.json
@@ -0,0 +1,1002 @@
+{
+  "contract_name": "TokenRegistry",
+  "abi": [
+    {
+      "constant": true,
+      "inputs": [
+        {
+          "name": "_name",
+          "type": "string"
+        }
+      ],
+      "name": "getTokenAddressByName",
+      "outputs": [
+        {
+          "name": "tokenAddress",
+          "type": "address"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "_token",
+          "type": "address"
+        },
+        {
+          "name": "_ipfsHash",
+          "type": "bytes32"
+        }
+      ],
+      "name": "setTokenIpfsHash",
+      "outputs": [],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [
+        {
+          "name": "_symbol",
+          "type": "string"
+        }
+      ],
+      "name": "getTokenAddressBySymbol",
+      "outputs": [
+        {
+          "name": "tokenAddress",
+          "type": "address"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "_token",
+          "type": "address"
+        }
+      ],
+      "name": "removeToken",
+      "outputs": [],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [
+        {
+          "name": "_token",
+          "type": "address"
+        }
+      ],
+      "name": "getTokenMetaData",
+      "outputs": [
+        {
+          "name": "tokenAddress",
+          "type": "address"
+        },
+        {
+          "name": "name",
+          "type": "string"
+        },
+        {
+          "name": "symbol",
+          "type": "string"
+        },
+        {
+          "name": "url",
+          "type": "string"
+        },
+        {
+          "name": "decimals",
+          "type": "uint8"
+        },
+        {
+          "name": "ipfsHash",
+          "type": "bytes32"
+        },
+        {
+          "name": "swarmHash",
+          "type": "bytes32"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [],
+      "name": "owner",
+      "outputs": [
+        {
+          "name": "",
+          "type": "address"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "_token",
+          "type": "address"
+        },
+        {
+          "name": "_url",
+          "type": "string"
+        }
+      ],
+      "name": "setTokenUrl",
+      "outputs": [],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "_token",
+          "type": "address"
+        },
+        {
+          "name": "_name",
+          "type": "string"
+        },
+        {
+          "name": "_symbol",
+          "type": "string"
+        },
+        {
+          "name": "_url",
+          "type": "string"
+        },
+        {
+          "name": "_decimals",
+          "type": "uint8"
+        },
+        {
+          "name": "_ipfsHash",
+          "type": "bytes32"
+        },
+        {
+          "name": "_swarmHash",
+          "type": "bytes32"
+        }
+      ],
+      "name": "addToken",
+      "outputs": [],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "_token",
+          "type": "address"
+        },
+        {
+          "name": "_name",
+          "type": "string"
+        }
+      ],
+      "name": "setTokenName",
+      "outputs": [],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [
+        {
+          "name": "",
+          "type": "address"
+        }
+      ],
+      "name": "tokens",
+      "outputs": [
+        {
+          "name": "token",
+          "type": "address"
+        },
+        {
+          "name": "name",
+          "type": "string"
+        },
+        {
+          "name": "symbol",
+          "type": "string"
+        },
+        {
+          "name": "url",
+          "type": "string"
+        },
+        {
+          "name": "decimals",
+          "type": "uint8"
+        },
+        {
+          "name": "ipfsHash",
+          "type": "bytes32"
+        },
+        {
+          "name": "swarmHash",
+          "type": "bytes32"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [
+        {
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "name": "tokenAddresses",
+      "outputs": [
+        {
+          "name": "",
+          "type": "address"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [
+        {
+          "name": "_name",
+          "type": "string"
+        }
+      ],
+      "name": "getTokenByName",
+      "outputs": [
+        {
+          "name": "tokenAddress",
+          "type": "address"
+        },
+        {
+          "name": "name",
+          "type": "string"
+        },
+        {
+          "name": "symbol",
+          "type": "string"
+        },
+        {
+          "name": "url",
+          "type": "string"
+        },
+        {
+          "name": "decimals",
+          "type": "uint8"
+        },
+        {
+          "name": "ipfsHash",
+          "type": "bytes32"
+        },
+        {
+          "name": "swarmHash",
+          "type": "bytes32"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "_token",
+          "type": "address"
+        },
+        {
+          "name": "_swarmHash",
+          "type": "bytes32"
+        }
+      ],
+      "name": "setTokenSwarmHash",
+      "outputs": [],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [],
+      "name": "getTokenAddresses",
+      "outputs": [
+        {
+          "name": "",
+          "type": "address[]"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": true,
+      "inputs": [
+        {
+          "name": "_symbol",
+          "type": "string"
+        }
+      ],
+      "name": "getTokenBySymbol",
+      "outputs": [
+        {
+          "name": "tokenAddress",
+          "type": "address"
+        },
+        {
+          "name": "name",
+          "type": "string"
+        },
+        {
+          "name": "symbol",
+          "type": "string"
+        },
+        {
+          "name": "url",
+          "type": "string"
+        },
+        {
+          "name": "decimals",
+          "type": "uint8"
+        },
+        {
+          "name": "ipfsHash",
+          "type": "bytes32"
+        },
+        {
+          "name": "swarmHash",
+          "type": "bytes32"
+        }
+      ],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "_token",
+          "type": "address"
+        },
+        {
+          "name": "_symbol",
+          "type": "string"
+        }
+      ],
+      "name": "setTokenSymbol",
+      "outputs": [],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "constant": false,
+      "inputs": [
+        {
+          "name": "newOwner",
+          "type": "address"
+        }
+      ],
+      "name": "transferOwnership",
+      "outputs": [],
+      "payable": false,
+      "type": "function"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": false,
+          "name": "token",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "name": "name",
+          "type": "string"
+        },
+        {
+          "indexed": false,
+          "name": "symbol",
+          "type": "string"
+        },
+        {
+          "indexed": false,
+          "name": "url",
+          "type": "string"
+        },
+        {
+          "indexed": false,
+          "name": "decimals",
+          "type": "uint8"
+        },
+        {
+          "indexed": false,
+          "name": "ipfsHash",
+          "type": "bytes32"
+        },
+        {
+          "indexed": false,
+          "name": "swarmHash",
+          "type": "bytes32"
+        }
+      ],
+      "name": "LogAddToken",
+      "type": "event"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": false,
+          "name": "token",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "name": "name",
+          "type": "string"
+        },
+        {
+          "indexed": false,
+          "name": "symbol",
+          "type": "string"
+        },
+        {
+          "indexed": false,
+          "name": "url",
+          "type": "string"
+        },
+        {
+          "indexed": false,
+          "name": "decimals",
+          "type": "uint8"
+        },
+        {
+          "indexed": false,
+          "name": "ipfsHash",
+          "type": "bytes32"
+        },
+        {
+          "indexed": false,
+          "name": "swarmHash",
+          "type": "bytes32"
+        }
+      ],
+      "name": "LogRemoveToken",
+      "type": "event"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": false,
+          "name": "token",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "name": "oldName",
+          "type": "string"
+        },
+        {
+          "indexed": false,
+          "name": "newName",
+          "type": "string"
+        }
+      ],
+      "name": "LogTokenNameChange",
+      "type": "event"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": false,
+          "name": "token",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "name": "oldSymbol",
+          "type": "string"
+        },
+        {
+          "indexed": false,
+          "name": "newSymbol",
+          "type": "string"
+        }
+      ],
+      "name": "LogTokenSymbolChange",
+      "type": "event"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": false,
+          "name": "token",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "name": "oldUrl",
+          "type": "string"
+        },
+        {
+          "indexed": false,
+          "name": "newUrl",
+          "type": "string"
+        }
+      ],
+      "name": "LogTokenUrlChange",
+      "type": "event"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": false,
+          "name": "token",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "name": "oldIpfsHash",
+          "type": "bytes32"
+        },
+        {
+          "indexed": false,
+          "name": "newIpfsHash",
+          "type": "bytes32"
+        }
+      ],
+      "name": "LogTokenIpfsHashChange",
+      "type": "event"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": false,
+          "name": "token",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "name": "oldSwarmHash",
+          "type": "bytes32"
+        },
+        {
+          "indexed": false,
+          "name": "newSwarmHash",
+          "type": "bytes32"
+        }
+      ],
+      "name": "LogTokenSwarmHashChange",
+      "type": "event"
+    }
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+        },
+        "0x53d878a6530e56c9bc96548fa0a8cae4f1d1f49c86b0e934c086b992ebb6998f": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": false,
+              "name": "token",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "name": "oldSymbol",
+              "type": "string"
+            },
+            {
+              "indexed": false,
+              "name": "newSymbol",
+              "type": "string"
+            }
+          ],
+          "name": "LogTokenSymbolChange",
+          "type": "event"
+        },
+        "0x6b45310c970f5d74814e429bdacd69c748dcb086cd38b6ddb7c2029be609e168": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": false,
+              "name": "token",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "name": "oldUrl",
+              "type": "string"
+            },
+            {
+              "indexed": false,
+              "name": "newUrl",
+              "type": "string"
+            }
+          ],
+          "name": "LogTokenUrlChange",
+          "type": "event"
+        },
+        "0xe46a8f26cfc48c12e40cf50c1063e5913b2a17da6aa396f9b008b2dfd6f273b5": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": false,
+              "name": "token",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "name": "oldIpfsHash",
+              "type": "bytes32"
+            },
+            {
+              "indexed": false,
+              "name": "newIpfsHash",
+              "type": "bytes32"
+            }
+          ],
+          "name": "LogTokenIpfsHashChange",
+          "type": "event"
+        },
+        "0xa9fd216856477e73d11c1a9140fa3d425fce2e10a5475a996440b31c2e8f1ea4": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": false,
+              "name": "token",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "name": "oldSwarmHash",
+              "type": "bytes32"
+            },
+            {
+              "indexed": false,
+              "name": "newSwarmHash",
+              "type": "bytes32"
+            }
+          ],
+          "name": "LogTokenSwarmHashChange",
+          "type": "event"
+        }
+      },
+      "updated_at": 1495042008599,
+      "address": "0xbfa86463a4faa2598bbe177debac62f4c8a3a294"
+    },
+    "50": {
+      "links": {},
+      "events": {
+        "0x469f18a43061267ac6162ca1cec0c14a425189c7a19f52d6dc04419f3c12bb24": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": false,
+              "name": "token",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "name": "name",
+              "type": "string"
+            },
+            {
+              "indexed": false,
+              "name": "symbol",
+              "type": "string"
+            },
+            {
+              "indexed": false,
+              "name": "url",
+              "type": "string"
+            },
+            {
+              "indexed": false,
+              "name": "decimals",
+              "type": "uint8"
+            },
+            {
+              "indexed": false,
+              "name": "ipfsHash",
+              "type": "bytes32"
+            },
+            {
+              "indexed": false,
+              "name": "swarmHash",
+              "type": "bytes32"
+            }
+          ],
+          "name": "LogAddToken",
+          "type": "event"
+        },
+        "0xc9ec69d3b744b4ec70f035ed0a15ed7029e668bfb9f326e657878b2b38a90da2": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": false,
+              "name": "token",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "name": "name",
+              "type": "string"
+            },
+            {
+              "indexed": false,
+              "name": "symbol",
+              "type": "string"
+            },
+            {
+              "indexed": false,
+              "name": "url",
+              "type": "string"
+            },
+            {
+              "indexed": false,
+              "name": "decimals",
+              "type": "uint8"
+            },
+            {
+              "indexed": false,
+              "name": "ipfsHash",
+              "type": "bytes32"
+            },
+            {
+              "indexed": false,
+              "name": "swarmHash",
+              "type": "bytes32"
+            }
+          ],
+          "name": "LogRemoveToken",
+          "type": "event"
+        },
+        "0x4a6dbfc867b179991dec22ff19960f0a94d8d9d891fc556f547764670340e8ae": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": false,
+              "name": "token",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "name": "oldName",
+              "type": "string"
+            },
+            {
+              "indexed": false,
+              "name": "newName",
+              "type": "string"
+            }
+          ],
+          "name": "LogTokenNameChange",
+          "type": "event"
+        },
+        "0x53d878a6530e56c9bc96548fa0a8cae4f1d1f49c86b0e934c086b992ebb6998f": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": false,
+              "name": "token",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "name": "oldSymbol",
+              "type": "string"
+            },
+            {
+              "indexed": false,
+              "name": "newSymbol",
+              "type": "string"
+            }
+          ],
+          "name": "LogTokenSymbolChange",
+          "type": "event"
+        },
+        "0x6b45310c970f5d74814e429bdacd69c748dcb086cd38b6ddb7c2029be609e168": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": false,
+              "name": "token",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "name": "oldUrl",
+              "type": "string"
+            },
+            {
+              "indexed": false,
+              "name": "newUrl",
+              "type": "string"
+            }
+          ],
+          "name": "LogTokenUrlChange",
+          "type": "event"
+        },
+        "0xe46a8f26cfc48c12e40cf50c1063e5913b2a17da6aa396f9b008b2dfd6f273b5": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": false,
+              "name": "token",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "name": "oldIpfsHash",
+              "type": "bytes32"
+            },
+            {
+              "indexed": false,
+              "name": "newIpfsHash",
+              "type": "bytes32"
+            }
+          ],
+          "name": "LogTokenIpfsHashChange",
+          "type": "event"
+        },
+        "0xa9fd216856477e73d11c1a9140fa3d425fce2e10a5475a996440b31c2e8f1ea4": {
+          "anonymous": false,
+          "inputs": [
+            {
+              "indexed": false,
+              "name": "token",
+              "type": "address"
+            },
+            {
+              "indexed": false,
+              "name": "oldSwarmHash",
+              "type": "bytes32"
+            },
+            {
+              "indexed": false,
+              "name": "newSwarmHash",
+              "type": "bytes32"
+            }
+          ],
+          "name": "LogTokenSwarmHashChange",
+          "type": "event"
+        }
+      },
+      "updated_at": 1495030736781,
+      "address": "0x0b1ba0af832d7c05fd64161e0db78e85978e8082"
+    }
+  },
+  "schema_version": "0.0.5",
+  "updated_at": 1495042008599
+}
\ No newline at end of file
diff --git a/src/ts/0x.js.ts b/src/ts/0x.js.ts
index 67e7c2fdd..1ebafc604 100644
--- a/src/ts/0x.js.ts
+++ b/src/ts/0x.js.ts
@@ -1,25 +1,22 @@
+import * as _ from 'lodash';
 import * as BigNumber from 'bignumber.js';
 import * as ethUtil from 'ethereumjs-util';
+import contract = require('truffle-contract');
+import * as Web3 from 'web3';
 import * as ethABI from 'ethereumjs-abi';
-import * as _ from 'lodash';
+import {Web3Wrapper} from './web3_wrapper';
 import {constants} from './utils/constants';
 import {utils} from './utils/utils';
 import {assert} from './utils/assert';
+import {ExchangeWrapper} from './contract_wrappers/exchange_wrapper';
 import {ECSignatureSchema} from './schemas/ec_signature_schema';
-import {SolidityTypes} from './types';
-
-/**
- * Elliptic Curve signature
- */
-export interface ECSignature {
-    v: number;
-    r: string;
-    s: string;
-}
+import {SolidityTypes, ECSignature} from './types';
 
 const MAX_DIGITS_IN_UNSIGNED_256_INT = 78;
 
 export class ZeroEx {
+    public web3Wrapper: Web3Wrapper;
+    public exchange: ExchangeWrapper;
     /**
      * Computes the orderHash given the order parameters and returns it as a hex encoded string.
      */
@@ -74,7 +71,8 @@ export class ZeroEx {
         const dataBuff = ethUtil.toBuffer(dataHex);
         const msgHashBuff = ethUtil.hashPersonalMessage(dataBuff);
         try {
-            const pubKey = ethUtil.ecrecover(msgHashBuff,
+            const pubKey = ethUtil.ecrecover(
+                msgHashBuff,
                 signature.v,
                 ethUtil.toBuffer(signature.r),
                 ethUtil.toBuffer(signature.s));
@@ -129,4 +127,8 @@ export class ZeroEx {
         const baseUnitAmount = amount.times(unit);
         return baseUnitAmount;
     }
+    constructor(web3: Web3) {
+        this.web3Wrapper = new Web3Wrapper(web3);
+        this.exchange = new ExchangeWrapper(this.web3Wrapper);
+    }
 }
diff --git a/src/ts/contract_wrappers/contract_wrapper.ts b/src/ts/contract_wrappers/contract_wrapper.ts
new file mode 100644
index 000000000..9f4cd8039
--- /dev/null
+++ b/src/ts/contract_wrappers/contract_wrapper.ts
@@ -0,0 +1,48 @@
+import * as _ from 'lodash';
+import contract = require('truffle-contract');
+import {Web3Wrapper} from '../web3_wrapper';
+import {ZeroExError} from '../types';
+import {utils} from '../utils/utils';
+
+export class ContractWrapper {
+    public web3Wrapper: Web3Wrapper;
+    constructor(web3Wrapper: Web3Wrapper) {
+        this.web3Wrapper = web3Wrapper;
+    }
+    protected async instantiateContractIfExistsAsync(artifact: Artifact, address?: string): Promise<ContractInstance> {
+        const c = await contract(artifact);
+        const providerObj = this.web3Wrapper.getCurrentProvider();
+        c.setProvider(providerObj);
+
+        const networkIdIfExists = await this.web3Wrapper.getNetworkIdIfExistsAsync();
+        const artifactNetworkConfigs = _.isUndefined(networkIdIfExists) ?
+                                       undefined :
+                                       artifact.networks[networkIdIfExists];
+        let contractAddress;
+        if (!_.isUndefined(address)) {
+            contractAddress = address;
+        } else if (!_.isUndefined(artifactNetworkConfigs)) {
+            contractAddress = artifactNetworkConfigs.address;
+        }
+
+        if (!_.isUndefined(contractAddress)) {
+            const doesContractExist = await this.web3Wrapper.doesContractExistAtAddressAsync(contractAddress);
+            if (!doesContractExist) {
+                throw new Error(ZeroExError.CONTRACT_DOES_NOT_EXIST);
+            }
+        }
+
+        try {
+            const contractInstance = _.isUndefined(address) ? await c.deployed() : await c.at(address);
+            return contractInstance;
+        } catch (err) {
+            const errMsg = `${err}`;
+            if (_.includes(errMsg, 'not been deployed to detected network')) {
+                throw new Error(ZeroExError.CONTRACT_DOES_NOT_EXIST);
+            } else {
+                utils.consoleLog(`Notice: Error encountered: ${err} ${err.stack}`);
+                throw new Error(ZeroExError.UNHANDLED_ERROR);
+            }
+        }
+    }
+}
diff --git a/src/ts/contract_wrappers/exchange_wrapper.ts b/src/ts/contract_wrappers/exchange_wrapper.ts
new file mode 100644
index 000000000..38043dd55
--- /dev/null
+++ b/src/ts/contract_wrappers/exchange_wrapper.ts
@@ -0,0 +1,37 @@
+import * as _ from 'lodash';
+import {Web3Wrapper} from '../web3_wrapper';
+import {ECSignature, ZeroExError, ExchangeContract} from '../types';
+import {assert} from '../utils/assert';
+import {ContractWrapper} from './contract_wrapper';
+import * as ExchangeArtifacts from '../../artifacts/Exchange.json';
+import {ECSignatureSchema} from '../schemas/ec_signature_schema';
+
+export class ExchangeWrapper extends ContractWrapper {
+    constructor(web3Wrapper: Web3Wrapper) {
+        super(web3Wrapper);
+    }
+    public async isValidSignatureAsync(dataHex: string, ecSignature: ECSignature,
+                                       signerAddressHex: string): Promise<boolean> {
+        assert.isHexString('dataHex', dataHex);
+        assert.doesConformToSchema('ecSignature', ecSignature, ECSignatureSchema);
+        assert.isETHAddressHex('signerAddressHex', signerAddressHex);
+
+        const senderAddressIfExists = await this.web3Wrapper.getSenderAddressIfExistsAsync();
+        assert.assert(!_.isUndefined(senderAddressIfExists), ZeroExError.USER_HAS_NO_ASSOCIATED_ADDRESSES);
+
+        const contractInstance = await this.instantiateContractIfExistsAsync((ExchangeArtifacts as any));
+        const exchangeInstance = contractInstance as ExchangeContract;
+
+        const isValidSignature = await exchangeInstance.isValidSignature.call(
+            signerAddressHex,
+            dataHex,
+            ecSignature.v,
+            ecSignature.r,
+            ecSignature.s,
+            {
+                from: senderAddressIfExists,
+            },
+        );
+        return isValidSignature;
+    }
+}
diff --git a/src/ts/globals.d.ts b/src/ts/globals.d.ts
index 99baf593f..dee957f2f 100644
--- a/src/ts/globals.d.ts
+++ b/src/ts/globals.d.ts
@@ -1,5 +1,8 @@
 declare module 'chai-bignumber';
 declare module 'bn.js';
+declare module 'request-promise-native';
+declare module 'web3-provider-engine';
+declare module 'web3-provider-engine/subproviders/rpc';
 
 declare interface Schema {
     id: string;
@@ -12,10 +15,18 @@ declare interface Schema {
 declare namespace Chai {
     interface Assertion {
         bignumber: Assertion;
+        eventually: Assertion;
     }
 }
 /* tslint:enable */
 
+declare module '*.json' {
+    const json: any;
+    /* tslint:disable */
+    export default json;
+    /* tslint:enable */
+}
+
 declare module 'ethereumjs-util' {
     const toBuffer: (dataHex: string) => Buffer;
     const hashPersonalMessage: (msg: Buffer) => Buffer;
@@ -23,6 +34,28 @@ declare module 'ethereumjs-util' {
     const ecrecover: (msgHashBuff: Buffer, v: number, r: Buffer, s: Buffer) => string;
     const pubToAddress: (pubKey: string) => Buffer;
     const isValidAddress: (address: string) => boolean;
+    const bufferToInt: (buffer: Buffer) => number;
+}
+
+// truffle-contract declarations
+declare interface ContractInstance {}
+declare interface ContractFactory {
+    setProvider: (providerObj: any) => void;
+    deployed: () => ContractInstance;
+    at: (address: string) => ContractInstance;
+}
+declare interface Artifact {
+    networks: {[networkId: number]: any};
+}
+declare function contract(artifacts: Artifact): ContractFactory;
+declare module 'truffle-contract' {
+    export = contract;
+}
+
+// es6-promisify declarations
+declare function promisify(original: any, settings?: any): ((...arg: any[]) => Promise<any>);
+declare module 'es6-promisify' {
+    export = promisify;
 }
 
 declare module 'ethereumjs-abi' {
diff --git a/src/ts/types.ts b/src/ts/types.ts
index 04902cca6..4da03a4d3 100644
--- a/src/ts/types.ts
+++ b/src/ts/types.ts
@@ -1,5 +1,4 @@
 import * as _ from 'lodash';
-import * as BigNumber from 'bignumber.js';
 
 // Utility function to create a K:V from a list of strings
 // Adapted from: https://basarat.gitbooks.io/typescript/content/docs/types/literal-types.html
@@ -10,6 +9,26 @@ function strEnum(values: string[]): {[key: string]: string} {
     }, Object.create(null));
 }
 
+export const ZeroExError = strEnum([
+  'CONTRACT_DOES_NOT_EXIST',
+  'UNHANDLED_ERROR',
+  'USER_HAS_NO_ASSOCIATED_ADDRESSES',
+]);
+export type ZeroExError = keyof typeof ZeroExError;
+
+/**
+ * Elliptic Curve signature
+ */
+export interface ECSignature {
+    v: number;
+    r: string;
+    s: string;
+}
+
+export interface ExchangeContract {
+    isValidSignature: any;
+}
+
 export const SolidityTypes = strEnum([
     'address',
     'uint256',
diff --git a/src/ts/utils/assert.ts b/src/ts/utils/assert.ts
index 2f52c6a3b..1baf572d1 100644
--- a/src/ts/utils/assert.ts
+++ b/src/ts/utils/assert.ts
@@ -1,30 +1,33 @@
 import * as _ from 'lodash';
 import * as BigNumber from 'bignumber.js';
-import Web3 = require('web3');
+import * as Web3 from 'web3';
 import {SchemaValidator} from './schema_validator';
 
 const HEX_REGEX = /^0x[0-9A-F]*$/i;
 
 export const assert = {
-    isBigNumber(variableName: string, value: BigNumber.BigNumber) {
+    isBigNumber(variableName: string, value: BigNumber.BigNumber): void {
         const isBigNumber = _.isObject(value) && value.isBigNumber;
         this.assert(isBigNumber, this.typeAssertionMessage(variableName, 'BigNumber', value));
     },
-    isString(variableName: string, value: string) {
+    isUndefined(value: any, variableName?: string): void {
+        this.assert(_.isUndefined(value), this.typeAssertionMessage(variableName, 'undefined', value));
+    },
+    isString(variableName: string, value: string): void {
         this.assert(_.isString(value), this.typeAssertionMessage(variableName, 'string', value));
     },
-    isHexString(variableName: string, value: string) {
+    isHexString(variableName: string, value: string): void {
         this.assert(_.isString(value) && HEX_REGEX.test(value),
             this.typeAssertionMessage(variableName, 'HexString', value));
     },
-    isETHAddressHex(variableName: string, value: string) {
+    isETHAddressHex(variableName: string, value: string): void {
         const web3 = new Web3();
         this.assert(web3.isAddress(value), this.typeAssertionMessage(variableName, 'ETHAddressHex', value));
     },
-    isNumber(variableName: string, value: number) {
+    isNumber(variableName: string, value: number): void {
         this.assert(_.isFinite(value), this.typeAssertionMessage(variableName, 'number', value));
     },
-    doesConformToSchema(variableName: string, value: object, schema: Schema) {
+    doesConformToSchema(variableName: string, value: object, schema: Schema): void {
         const schemaValidator = new SchemaValidator();
         const validationResult = schemaValidator.validate(value, schema);
         const hasValidationErrors = validationResult.errors.length > 0;
@@ -33,12 +36,12 @@ Encountered: ${JSON.stringify(value, null, '\t')}
 Validation errors: ${validationResult.errors.join(', ')}`;
         this.assert(!hasValidationErrors, msg);
     },
-    assert(condition: boolean, message: string) {
+    assert(condition: boolean, message: string): void {
         if (!condition) {
             throw new Error(message);
         }
     },
-    typeAssertionMessage(variableName: string, type: string, value: any) {
+    typeAssertionMessage(variableName: string, type: string, value: any): string {
         return `Expected ${variableName} to be of type ${type}, encountered: ${value}`;
     },
 };
diff --git a/src/ts/utils/constants.ts b/src/ts/utils/constants.ts
index 60af7b674..ec2fe744a 100644
--- a/src/ts/utils/constants.ts
+++ b/src/ts/utils/constants.ts
@@ -1,3 +1,3 @@
 export const constants = {
     NULL_ADDRESS: '0x0000000000000000000000000000000000000000',
-}
+};
diff --git a/src/ts/utils/utils.ts b/src/ts/utils/utils.ts
index bde1e7aba..b514b702d 100644
--- a/src/ts/utils/utils.ts
+++ b/src/ts/utils/utils.ts
@@ -3,11 +3,16 @@ import * as BN from 'bn.js';
 export const utils = {
     /**
      * Converts BigNumber instance to BN
-     * The only we convert to BN is to remain compatible with `ethABI. soliditySHA3 ` that
-     * expects values of Solidity type `uint` to be of type `BN`.
+     * The only reason we convert to BN is to remain compatible with `ethABI. soliditySHA3` that
+     * expects values of Solidity type `uint` to be passed as type `BN`.
      * We do not use BN anywhere else in the codebase.
      */
     bigNumberToBN(value: BigNumber.BigNumber) {
         return new BN(value.toString(), 10);
     },
+    consoleLog(message: string): void {
+        /* tslint:disable */
+        console.log(message);
+        /* tslint:enable */
+    },
 };
diff --git a/src/ts/web3_wrapper.ts b/src/ts/web3_wrapper.ts
new file mode 100644
index 000000000..3b460e4da
--- /dev/null
+++ b/src/ts/web3_wrapper.ts
@@ -0,0 +1,69 @@
+import * as _ from 'lodash';
+import * as Web3 from 'web3';
+import * as BigNumber from 'bignumber.js';
+import promisify = require('es6-promisify');
+
+export class Web3Wrapper {
+    private web3: Web3;
+    constructor(web3: Web3) {
+        this.web3 = new Web3();
+        this.web3.setProvider(web3.currentProvider);
+    }
+    public isAddress(address: string): boolean {
+        return this.web3.isAddress(address);
+    }
+    public async getSenderAddressIfExistsAsync(): Promise<string|undefined> {
+        const defaultAccount = this.web3.eth.defaultAccount;
+        if (!_.isUndefined(defaultAccount)) {
+            return defaultAccount;
+        }
+        const firstAccount = await this.getFirstAddressIfExistsAsync();
+        return firstAccount;
+    }
+    public async getFirstAddressIfExistsAsync(): Promise<string|undefined> {
+        const addresses = await promisify(this.web3.eth.getAccounts)();
+        if (_.isEmpty(addresses)) {
+            return undefined;
+        }
+        return (addresses as string[])[0];
+    }
+    public async getNodeVersionAsync(): Promise<string> {
+        const nodeVersion = await promisify(this.web3.version.getNode)();
+        return nodeVersion;
+    }
+    public getCurrentProvider(): Web3.Provider {
+        return this.web3.currentProvider;
+    }
+    public async getNetworkIdIfExistsAsync(): Promise<number|undefined> {
+        try {
+            const networkId = await this.getNetworkAsync();
+            return Number(networkId);
+        } catch (err) {
+            return undefined;
+        }
+    }
+    public async getBalanceInEthAsync(owner: string): Promise<BigNumber.BigNumber> {
+        const balanceInWei = await promisify(this.web3.eth.getBalance)(owner);
+        const balanceEth = this.web3.fromWei(balanceInWei, 'ether');
+        return balanceEth;
+    }
+    public async doesContractExistAtAddressAsync(address: string): Promise<boolean> {
+        const code = await promisify(this.web3.eth.getCode)(address);
+        // Regex matches 0x0, 0x00, 0x in order to accomodate poorly implemented clients
+        const zeroHexAddressRegex = /^0x0\{0,40\}$/i;
+        const didFindCode = _.isNull(code.match(zeroHexAddressRegex));
+        return didFindCode;
+    }
+    public async signTransactionAsync(address: string, message: string): Promise<string> {
+        const signData = await promisify(this.web3.eth.sign)(address, message);
+        return signData;
+    }
+    public async getBlockTimestampAsync(blockHash: string): Promise<number> {
+        const {timestamp} = await promisify(this.web3.eth.getBlock)(blockHash);
+        return timestamp;
+    }
+    private async getNetworkAsync(): Promise<number> {
+        const networkId = await promisify(this.web3.version.getNetwork)();
+        return networkId;
+    }
+}