32 files changed, 192 insertions, 120 deletions

diff --git a/package.json b/package.json
index e15ee9239..e6230bf18 100644
--- a/package.json
+++ b/package.json
@@ -10,13 +10,14 @@
         "lerna:publish": "yarn install; lerna run clean; lerna run build; lerna publish --registry=https://registry.npmjs.org/"
     },
     "config": {
-      "mnemonic": "concert load couple harbor equip island argue ramp clarify fence smart topic"
+        "mnemonic": "concert load couple harbor equip island argue ramp clarify fence smart topic"
     },
     "devDependencies": {
-        "lerna": "^2.5.1",
+        "@0xproject/utils": "^0.1.0",
         "async-child-process": "^1.1.1",
-        "semver-sort": "^0.0.4",
+        "ethereumjs-testrpc": "6.0.3",
+        "lerna": "^2.5.1",
         "publish-release": "0xproject/publish-release",
-        "ethereumjs-testrpc": "6.0.3"
+        "semver-sort": "^0.0.4"
     }
 }
diff --git a/packages/0x.js/src/contract_wrappers/contract_wrapper.ts b/packages/0x.js/src/contract_wrappers/contract_wrapper.ts
index d56b8632d..5caf06db2 100644
--- a/packages/0x.js/src/contract_wrappers/contract_wrapper.ts
+++ b/packages/0x.js/src/contract_wrappers/contract_wrapper.ts
@@ -34,7 +34,7 @@ export class ContractWrapper {
     protected _web3Wrapper: Web3Wrapper;
     private _networkId: number;
     private _abiDecoder?: AbiDecoder;
-    private _blockAndLogStreamer: BlockAndLogStreamer|undefined;
+    private _blockAndLogStreamerIfExists: BlockAndLogStreamer|undefined;
     private _blockAndLogStreamInterval: NodeJS.Timer;
     private _filters: {[filterToken: string]: Web3.FilterObject};
     private _filterCallbacks: {[filterToken: string]: EventCallback<ContractEventArgs>};
@@ -46,7 +46,7 @@ export class ContractWrapper {
         this._abiDecoder = abiDecoder;
         this._filters = {};
         this._filterCallbacks = {};
-        this._blockAndLogStreamer = undefined;
+        this._blockAndLogStreamerIfExists = undefined;
         this._onLogAddedSubscriptionToken = undefined;
         this._onLogRemovedSubscriptionToken = undefined;
     }
@@ -77,7 +77,7 @@ export class ContractWrapper {
         address: string, eventName: ContractEvents, indexFilterValues: IndexedFilterValues, abi: Web3.ContractAbi,
         callback: EventCallback<ArgsType>): string {
         const filter = filterUtils.getFilter(address, eventName, indexFilterValues, abi);
-        if (_.isUndefined(this._blockAndLogStreamer)) {
+        if (_.isUndefined(this._blockAndLogStreamerIfExists)) {
             this._startBlockAndLogStream();
         }
         const filterToken = filterUtils.generateUUID();
@@ -146,39 +146,43 @@ export class ContractWrapper {
         });
     }
     private _startBlockAndLogStream(): void {
-        this._blockAndLogStreamer = new BlockAndLogStreamer(
+        if (!_.isUndefined(this._blockAndLogStreamerIfExists)) {
+            throw new Error(ZeroExError.SubscriptionAlreadyPresent);
+        }
+        this._blockAndLogStreamerIfExists = new BlockAndLogStreamer(
             this._web3Wrapper.getBlockAsync.bind(this._web3Wrapper),
             this._web3Wrapper.getLogsAsync.bind(this._web3Wrapper),
         );
         const catchAllLogFilter = {};
-        this._blockAndLogStreamer.addLogFilter(catchAllLogFilter);
+        this._blockAndLogStreamerIfExists.addLogFilter(catchAllLogFilter);
         this._blockAndLogStreamInterval = intervalUtils.setAsyncExcludingInterval(
             this._reconcileBlockAsync.bind(this), constants.DEFAULT_BLOCK_POLLING_INTERVAL,
         );
         let isRemoved = false;
-        this._onLogAddedSubscriptionToken = this._blockAndLogStreamer.subscribeToOnLogAdded(
+        this._onLogAddedSubscriptionToken = this._blockAndLogStreamerIfExists.subscribeToOnLogAdded(
             this._onLogStateChanged.bind(this, isRemoved),
         );
         isRemoved = true;
-        this._onLogRemovedSubscriptionToken = this._blockAndLogStreamer.subscribeToOnLogRemoved(
+        this._onLogRemovedSubscriptionToken = this._blockAndLogStreamerIfExists.subscribeToOnLogRemoved(
             this._onLogStateChanged.bind(this, isRemoved),
         );
     }
     private _stopBlockAndLogStream(): void {
-        (this._blockAndLogStreamer as BlockAndLogStreamer).unsubscribeFromOnLogAdded(
-            this._onLogAddedSubscriptionToken as string);
-        (this._blockAndLogStreamer as BlockAndLogStreamer).unsubscribeFromOnLogRemoved(
-            this._onLogRemovedSubscriptionToken as string);
+        if (_.isUndefined(this._blockAndLogStreamerIfExists)) {
+            throw new Error(ZeroExError.SubscriptionNotFound);
+        }
+        this._blockAndLogStreamerIfExists.unsubscribeFromOnLogAdded(this._onLogAddedSubscriptionToken as string);
+        this._blockAndLogStreamerIfExists.unsubscribeFromOnLogRemoved(this._onLogRemovedSubscriptionToken as string);
         intervalUtils.clearAsyncExcludingInterval(this._blockAndLogStreamInterval);
-        delete this._blockAndLogStreamer;
+        delete this._blockAndLogStreamerIfExists;
     }
     private async _reconcileBlockAsync(): Promise<void> {
         try {
             const latestBlock = await this._web3Wrapper.getBlockAsync(BlockParamLiteral.Latest);
             // We need to coerce to Block type cause Web3.Block includes types for mempool blocks
-            if (!_.isUndefined(this._blockAndLogStreamer)) {
+            if (!_.isUndefined(this._blockAndLogStreamerIfExists)) {
                 // If we clear the interval while fetching the block - this._blockAndLogStreamer will be undefined
-                await this._blockAndLogStreamer.reconcileNewBlock(latestBlock as any as Block);
+                await this._blockAndLogStreamerIfExists.reconcileNewBlock(latestBlock as any as Block);
             }
         } catch (err) {
             const filterTokens = _.keys(this._filterCallbacks);
diff --git a/packages/abi-gen/CHANGELOG.md b/packages/abi-gen/CHANGELOG.md
new file mode 100644
index 000000000..b4cce6be0
--- /dev/null
+++ b/packages/abi-gen/CHANGELOG.md
@@ -0,0 +1,4 @@
+# CHANGELOG
+
+vx.x.x
+------------------------
diff --git a/packages/abi-gen/scripts/postpublish.js b/packages/abi-gen/scripts/postpublish.js
new file mode 100644
index 000000000..7fa452b08
--- /dev/null
+++ b/packages/abi-gen/scripts/postpublish.js
@@ -0,0 +1,14 @@
+const postpublish_utils = require('../../../scripts/postpublish_utils');
+const packageJSON = require('../package.json');
+
+const subPackageName = packageJSON.name;
+
+postpublish_utils.getLatestTagAndVersionAsync(subPackageName)
+    .then(function(result) {
+        const releaseName = postpublish_utils.getReleaseName(subPackageName, result.version);
+        const assets = [];
+        return postpublish_utils.publishReleaseNotes(result.tag, releaseName, assets);
+    })
+    .catch (function(err) {
+        throw err;
+    });
diff --git a/packages/contracts/build/contracts/DummyToken.json b/packages/contracts/build/contracts/DummyToken.json
index 2698a1e17..6ed9daeed 100644
--- a/packages/contracts/build/contracts/DummyToken.json
+++ b/packages/contracts/build/contracts/DummyToken.json
@@ -286,7 +286,7 @@
       "type": "event"
     }
   ],
-  "unlinked_binary": "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",
+  "unlinked_binary": "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",
   "networks": {
     "50": {
       "links": {},
@@ -336,9 +336,9 @@
           "type": "event"
         }
       },
-      "updated_at": 1502391794392
+      "updated_at": 1513088404208
     }
   },
   "schema_version": "0.0.5",
-  "updated_at": 1502391794392
+  "updated_at": 1513088404208
 }
\ No newline at end of file
diff --git a/packages/contracts/build/contracts/EtherToken.json b/packages/contracts/build/contracts/EtherToken.json
index f46e256ca..64e144e20 100644
--- a/packages/contracts/build/contracts/EtherToken.json
+++ b/packages/contracts/build/contracts/EtherToken.json
@@ -233,9 +233,9 @@
       "type": "event"
     }
   ],
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   "networks": {
-    "50": {
+    "1": {
       "links": {},
       "events": {
         "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef": {
@@ -283,8 +283,8 @@
           "type": "event"
         }
       },
-      "updated_at": 1502391794392,
-      "address": "0x6eead871b92e216b0368f596e751a25841f65bec"
+      "updated_at": 1502488087000,
+      "address": "0x2956356cd2a2bf3202f771f50d3d14a367b48070"
     },
     "42": {
       "links": {},
@@ -337,7 +337,7 @@
       "updated_at": 1502391794392,
       "address": "0x05d090b51c40b020eab3bfcb6a2dff130df22e9c"
     },
-    "1": {
+    "50": {
       "links": {},
       "events": {
         "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef": {
@@ -385,10 +385,10 @@
           "type": "event"
         }
       },
-      "updated_at": 1502488087000,
-      "address": "0x2956356cd2a2bf3202f771f50d3d14a367b48070"
+      "updated_at": 1513088404209,
+      "address": "0x48bacb9266a570d521063ef5dd96e61686dbe788"
     }
   },
   "schema_version": "0.0.5",
-  "updated_at": 1502391794392
-}
+  "updated_at": 1513088404209
+}
\ No newline at end of file
diff --git a/packages/contracts/build/contracts/Exchange.json b/packages/contracts/build/contracts/Exchange.json
index 245b8e86c..3e2308f8f 100644
--- a/packages/contracts/build/contracts/Exchange.json
+++ b/packages/contracts/build/contracts/Exchange.json
@@ -590,9 +590,9 @@
       "type": "event"
     }
   ],
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   "networks": {
-    "50": {
+    "1": {
       "links": {},
       "events": {
         "0x0d0b9391970d9a25552f37d436d2aae2925e2bfe1b2a923754bada030c498cb3": {
@@ -722,8 +722,8 @@
           "type": "event"
         }
       },
-      "updated_at": 1502391794390,
-      "address": "0x38024cc964e6f2745672c86ecf45f5965efe6310"
+      "updated_at": 1502480340000,
+      "address": "0x12459C951127e0c374FF9105DdA097662A027093"
     },
     "42": {
       "links": {},
@@ -858,7 +858,7 @@
       "updated_at": 1502391794390,
       "address": "0x90fe2af704b34e0224bf2299c838e04d4dcf1364"
     },
-    "1": {
+    "50": {
       "links": {},
       "events": {
         "0x0d0b9391970d9a25552f37d436d2aae2925e2bfe1b2a923754bada030c498cb3": {
@@ -988,10 +988,10 @@
           "type": "event"
         }
       },
-      "updated_at": 1502480340000,
-      "address": "0x12459C951127e0c374FF9105DdA097662A027093"
+      "updated_at": 1513088404206,
+      "address": "0xb69e673309512a9d726f87304c6984054f87a93b"
     }
   },
   "schema_version": "0.0.5",
-  "updated_at": 1502391794390
-}
+  "updated_at": 1513088404206
+}
\ No newline at end of file
diff --git a/packages/contracts/build/contracts/MaliciousToken.json b/packages/contracts/build/contracts/MaliciousToken.json
index 61c48f26a..fc8c8faeb 100644
--- a/packages/contracts/build/contracts/MaliciousToken.json
+++ b/packages/contracts/build/contracts/MaliciousToken.json
@@ -169,7 +169,7 @@
       "type": "event"
     }
   ],
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   "networks": {
     "50": {
       "links": {},
@@ -219,9 +219,9 @@
           "type": "event"
         }
       },
-      "updated_at": 1502391794396
+      "updated_at": 1513088404210
     }
   },
   "schema_version": "0.0.5",
-  "updated_at": 1502391794396
+  "updated_at": 1513088404210
 }
\ No newline at end of file
diff --git a/packages/contracts/build/contracts/Migrations.json b/packages/contracts/build/contracts/Migrations.json
index e421c8130..a0643bb6c 100644
--- a/packages/contracts/build/contracts/Migrations.json
+++ b/packages/contracts/build/contracts/Migrations.json
@@ -64,9 +64,9 @@
     "50": {
       "links": {},
       "events": {},
-      "updated_at": 1502391794384
+      "updated_at": 1513088404203
     }
   },
   "schema_version": "0.0.5",
-  "updated_at": 1502391794384
+  "updated_at": 1513088404203
 }
\ No newline at end of file
diff --git a/packages/contracts/build/contracts/Mintable.json b/packages/contracts/build/contracts/Mintable.json
index 157d49a44..3d89194a0 100644
--- a/packages/contracts/build/contracts/Mintable.json
+++ b/packages/contracts/build/contracts/Mintable.json
@@ -182,8 +182,8 @@
       "type": "event"
     }
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   "networks": {},
   "schema_version": "0.0.5",
-  "updated_at": 1502391449723
+  "updated_at": 1513088402049
 }
\ No newline at end of file
diff --git a/packages/contracts/build/contracts/MultiSigWallet.json b/packages/contracts/build/contracts/MultiSigWallet.json
index cb6be0217..931c8100d 100644
--- a/packages/contracts/build/contracts/MultiSigWallet.json
+++ b/packages/contracts/build/contracts/MultiSigWallet.json
@@ -510,8 +510,8 @@
       "type": "event"
     }
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   "networks": {},
   "schema_version": "0.0.5",
-  "updated_at": 1502391449722
+  "updated_at": 1513088402049
 }
\ No newline at end of file
diff --git a/packages/contracts/build/contracts/MultiSigWalletWithTimeLock.json b/packages/contracts/build/contracts/MultiSigWalletWithTimeLock.json
index 8bab88188..a44d63919 100644
--- a/packages/contracts/build/contracts/MultiSigWalletWithTimeLock.json
+++ b/packages/contracts/build/contracts/MultiSigWalletWithTimeLock.json
@@ -587,7 +587,7 @@
       "type": "event"
     }
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   "networks": {
     "50": {
       "links": {},
@@ -745,10 +745,10 @@
           "type": "event"
         }
       },
-      "updated_at": 1502391794388,
-      "address": "0x6488c866dd2a8528c2f5a9009a9fcde6fe2a3736"
+      "updated_at": 1513088404204,
+      "address": "0x1d7022f5b17d2f8b695918fb48fa1089c9f85401"
     }
   },
   "schema_version": "0.0.5",
-  "updated_at": 1502391794388
+  "updated_at": 1513088404204
 }
\ No newline at end of file
diff --git a/packages/contracts/build/contracts/MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress.json b/packages/contracts/build/contracts/MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress.json
index a83a284e3..454c07961 100644
--- a/packages/contracts/build/contracts/MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress.json
+++ b/packages/contracts/build/contracts/MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress.json
@@ -635,7 +635,7 @@
       "type": "event"
     }
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   "networks": {
     "50": {
       "links": {},
@@ -793,9 +793,9 @@
           "type": "event"
         }
       },
-      "updated_at": 1502391794394
+      "updated_at": 1513088404209
     }
   },
   "schema_version": "0.0.5",
-  "updated_at": 1502391794394
+  "updated_at": 1513088404209
 }
\ No newline at end of file
diff --git a/packages/contracts/build/contracts/Ownable.json b/packages/contracts/build/contracts/Ownable.json
index ebe5a1804..d0e73d497 100644
--- a/packages/contracts/build/contracts/Ownable.json
+++ b/packages/contracts/build/contracts/Ownable.json
@@ -33,8 +33,8 @@
       "type": "constructor"
     }
   ],
-  "unlinked_binary": "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",
+  "unlinked_binary": "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",
   "networks": {},
   "schema_version": "0.0.5",
-  "updated_at": 1502391792217
+  "updated_at": 1513088402049
 }
\ No newline at end of file
diff --git a/packages/contracts/build/contracts/SafeMath.json b/packages/contracts/build/contracts/SafeMath.json
index 86782f47a..fe15df18b 100644
--- a/packages/contracts/build/contracts/SafeMath.json
+++ b/packages/contracts/build/contracts/SafeMath.json
@@ -1,8 +1,8 @@
 {
   "contract_name": "SafeMath",
   "abi": [],
-  "unlinked_binary": "0x60606040523415600b57fe5b5b60338060196000396000f30060606040525bfe00a165627a7a723058201f432ae32cd7cc9a0efb0b70b25524cf42d165202875a497f8b0122d77a6a5ba0029",
+  "unlinked_binary": "0x60606040523415600b57fe5b5b60338060196000396000f30060606040525bfe00a165627a7a72305820becdc80300a4dbf834bb9ab115616eb459f82b51a9133d360eb1e6e5402072eb0029",
   "networks": {},
   "schema_version": "0.0.5",
-  "updated_at": 1502391792217
+  "updated_at": 1513088402049
 }
\ No newline at end of file
diff --git a/packages/contracts/build/contracts/StandardToken.json b/packages/contracts/build/contracts/StandardToken.json
index 4f67b8772..3f3f3921f 100644
--- a/packages/contracts/build/contracts/StandardToken.json
+++ b/packages/contracts/build/contracts/StandardToken.json
@@ -169,8 +169,8 @@
       "type": "event"
     }
   ],
-  "unlinked_binary": "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",
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   "networks": {},
   "schema_version": "0.0.5",
-  "updated_at": 1502391449723
+  "updated_at": 1513088402049
 }
\ No newline at end of file
diff --git a/packages/contracts/build/contracts/Token.json b/packages/contracts/build/contracts/Token.json
index 9487c0782..c16f36d98 100644
--- a/packages/contracts/build/contracts/Token.json
+++ b/packages/contracts/build/contracts/Token.json
@@ -169,8 +169,8 @@
       "type": "event"
     }
   ],
-  "unlinked_binary": "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",
+  "unlinked_binary": "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",
   "networks": {},
   "schema_version": "0.0.5",
-  "updated_at": 1502391792217
+  "updated_at": 1513088402049
 }
\ No newline at end of file
diff --git a/packages/contracts/build/contracts/TokenRegistry.json b/packages/contracts/build/contracts/TokenRegistry.json
index f7989ef8f..1dda2dc74 100644
--- a/packages/contracts/build/contracts/TokenRegistry.json
+++ b/packages/contracts/build/contracts/TokenRegistry.json
@@ -527,9 +527,9 @@
       "type": "event"
     }
   ],
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-      "address": "0xf7c37d12f3355d052ef9ca60131118af615f5653"
+      "updated_at": 1502488442000,
+      "address": "0x926a74c5c36adf004c87399e65f75628b0f98d2c"
     },
     "42": {
       "links": {},
@@ -867,7 +867,7 @@
       "updated_at": 1502391794385,
       "address": "0xf18e504561f4347bea557f3d4558f559dddbae7f"
     },
-    "1": {
+    "50": {
       "links": {},
       "events": {
         "0xd8d928b0b50ca11d9dc273236b46f3526515b03602f71f3a6af4f45bd9fa9144": {
@@ -1033,10 +1033,10 @@
           "type": "event"
         }
       },
-      "updated_at": 1502488442000,
-      "address": "0x926a74c5c36adf004c87399e65f75628b0f98d2c"
+      "updated_at": 1513088404203,
+      "address": "0x0b1ba0af832d7c05fd64161e0db78e85978e8082"
     }
   },
   "schema_version": "0.0.5",
-  "updated_at": 1502391794385
-}
+  "updated_at": 1513088404203
+}
\ No newline at end of file
diff --git a/packages/contracts/build/contracts/TokenTransferProxy.json b/packages/contracts/build/contracts/TokenTransferProxy.json
index dc2c13f0c..4dd37f0bc 100644
--- a/packages/contracts/build/contracts/TokenTransferProxy.json
+++ b/packages/contracts/build/contracts/TokenTransferProxy.json
@@ -167,9 +167,9 @@
       "type": "event"
     }
   ],
-  "unlinked_binary": "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",
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   "networks": {
-    "50": {
+    "1": {
       "links": {},
       "events": {
         "0x94bb87f4c15c4587ff559a7584006fa01ddf9299359be6b512b94527aa961aca": {
@@ -207,8 +207,8 @@
           "type": "event"
         }
       },
-      "updated_at": 1502391794384,
-      "address": "0x168ead2eadb6b3b8f47d6ae0ff418451c1087239"
+      "updated_at": 1502478966000,
+      "address": "0x8da0d80f5007ef1e431dd2127178d224e32c2ef4"
     },
     "42": {
       "links": {},
@@ -251,7 +251,7 @@
       "updated_at": 1502391794384,
       "address": "0x087Eed4Bc1ee3DE49BeFbd66C662B434B15d49d4"
     },
-    "1": {
+    "50": {
       "links": {},
       "events": {
         "0x94bb87f4c15c4587ff559a7584006fa01ddf9299359be6b512b94527aa961aca": {
@@ -289,10 +289,10 @@
           "type": "event"
         }
       },
-      "updated_at": 1502478966000,
-      "address": "0x8da0d80f5007ef1e431dd2127178d224e32c2ef4"
+      "updated_at": 1513088404202,
+      "address": "0x871dd7c2b4b25e1aa18728e9d5f2af4c4e431f5c"
     }
   },
   "schema_version": "0.0.5",
-  "updated_at": 1502391794384
-}
+  "updated_at": 1513088404202
+}
\ No newline at end of file
diff --git a/packages/contracts/build/contracts/ZRXToken.json b/packages/contracts/build/contracts/ZRXToken.json
index 3aac50ace..37a576c93 100644
--- a/packages/contracts/build/contracts/ZRXToken.json
+++ b/packages/contracts/build/contracts/ZRXToken.json
@@ -213,9 +213,9 @@
       "type": "event"
     }
   ],
-  "unlinked_binary": "0x60606040526b033b2e3c9fd0803ce8000000600355341561001c57fe5b5b600354600160a060020a0333166000908152602081905260409020555b5b6106198061004a6000396000f3006060604052361561007d5763ffffffff60e060020a60003504166306fdde03811461007f578063095ea7b31461010f57806318160ddd1461014257806323b872dd14610164578063313ce5671461019d57806370a08231146101c357806395d89b41146101f1578063a9059cbb14610281578063dd62ed3e146102b4575bfe5b341561008757fe5b61008f6102e8565b6040805160208082528351818301528351919283929083019185019080838382156100d5575b8051825260208311156100d557601f1990920191602091820191016100b5565b505050905090810190601f1680156101015780820380516001836020036101000a031916815260200191505b509250505060405180910390f35b341561011757fe5b61012e600160a060020a0360043516602435610316565b604080519115158252519081900360200190f35b341561014a57fe5b610152610381565b60408051918252519081900360200190f35b341561016c57fe5b61012e600160a060020a0360043581169060243516604435610387565b604080519115158252519081900360200190f35b34156101a557fe5b6101ad6104aa565b6040805160ff9092168252519081900360200190f35b34156101cb57fe5b610152600160a060020a03600435166104af565b60408051918252519081900360200190f35b34156101f957fe5b61008f6104ce565b6040805160208082528351818301528351919283929083019185019080838382156100d5575b8051825260208311156100d557601f1990920191602091820191016100b5565b505050905090810190601f1680156101015780820380516001836020036101000a031916815260200191505b509250505060405180910390f35b341561028957fe5b61012e600160a060020a03600435166024356104ee565b604080519115158252519081900360200190f35b34156102bc57fe5b610152600160a060020a03600435811690602435166105a0565b60408051918252519081900360200190f35b6040805180820190915260118152607960020a70183c10283937ba37b1b7b6102a37b5b2b702602082015281565b600160a060020a03338116600081815260016020908152604080832094871680845294825280832086905580518681529051929493927f8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925929181900390910190a35060015b92915050565b60035481565b600160a060020a03808416600081815260016020908152604080832033909516835293815283822054928252819052918220548390108015906103ca5750828110155b80156103f05750600160a060020a03841660009081526020819052604090205483810110155b1561049c57600160a060020a038085166000908152602081905260408082208054870190559187168152208054849003905560001981101561045a57600160a060020a03808616600090815260016020908152604080832033909416835292905220805484900390555b83600160a060020a031685600160a060020a03166000805160206105ce833981519152856040518082815260200191505060405180910390a3600191506104a1565b600091505b5b509392505050565b601281565b600160a060020a0381166000908152602081905260409020545b919050565b604080518082019091526003815260eb60020a620b4a4b02602082015281565b600160a060020a0333166000908152602081905260408120548290108015906105315750600160a060020a03831660009081526020819052604090205482810110155b1561059157600160a060020a0333811660008181526020818152604080832080548890039055938716808352918490208054870190558351868152935191936000805160206105ce833981519152929081900390910190a350600161037b565b50600061037b565b5b92915050565b600160a060020a038083166000908152600160209081526040808320938516835292905220545b929150505600ddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3efa165627a7a72305820c3b32a51a49bb8e7b08cb40d70b018590761113b8e17709dace660ef94b069e30029",
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   "networks": {
-    "50": {
+    "1": {
       "links": {},
       "events": {
         "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef": {
@@ -263,7 +263,8 @@
           "type": "event"
         }
       },
-      "updated_at": 1502391794391
+      "updated_at": 1502477311000,
+      "address": "0xe41d2489571d322189246dafa5ebde1f4699f498"
     },
     "42": {
       "links": {},
@@ -315,8 +316,8 @@
       },
       "updated_at": 1502391794391,
       "address": "0x6ff6c0ff1d68b964901f986d4c9fa3ac68346570"
-   },
-    "1": {
+    },
+    "50": {
       "links": {},
       "events": {
         "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef": {
@@ -364,10 +365,9 @@
           "type": "event"
         }
       },
-      "updated_at": 1502477311000,
-      "address": "0xe41d2489571d322189246dafa5ebde1f4699f498"
+      "updated_at": 1513088404207
     }
   },
   "schema_version": "0.0.5",
-  "updated_at": 1502391794391
-}
+  "updated_at": 1513088404207
+}
\ No newline at end of file
diff --git a/packages/subproviders/CHANGELOG.md b/packages/subproviders/CHANGELOG.md
new file mode 100644
index 000000000..b4cce6be0
--- /dev/null
+++ b/packages/subproviders/CHANGELOG.md
@@ -0,0 +1,4 @@
+# CHANGELOG
+
+vx.x.x
+------------------------
diff --git a/packages/subproviders/scripts/postpublish.js b/packages/subproviders/scripts/postpublish.js
new file mode 100644
index 000000000..7fa452b08
--- /dev/null
+++ b/packages/subproviders/scripts/postpublish.js
@@ -0,0 +1,14 @@
+const postpublish_utils = require('../../../scripts/postpublish_utils');
+const packageJSON = require('../package.json');
+
+const subPackageName = packageJSON.name;
+
+postpublish_utils.getLatestTagAndVersionAsync(subPackageName)
+    .then(function(result) {
+        const releaseName = postpublish_utils.getReleaseName(subPackageName, result.version);
+        const assets = [];
+        return postpublish_utils.publishReleaseNotes(result.tag, releaseName, assets);
+    })
+    .catch (function(err) {
+        throw err;
+    });
diff --git a/packages/types/CHANGELOG.md b/packages/types/CHANGELOG.md
new file mode 100644
index 000000000..b4cce6be0
--- /dev/null
+++ b/packages/types/CHANGELOG.md
@@ -0,0 +1,4 @@
+# CHANGELOG
+
+vx.x.x
+------------------------
diff --git a/packages/types/scripts/postpublish.js b/packages/types/scripts/postpublish.js
new file mode 100644
index 000000000..7fa452b08
--- /dev/null
+++ b/packages/types/scripts/postpublish.js
@@ -0,0 +1,14 @@
+const postpublish_utils = require('../../../scripts/postpublish_utils');
+const packageJSON = require('../package.json');
+
+const subPackageName = packageJSON.name;
+
+postpublish_utils.getLatestTagAndVersionAsync(subPackageName)
+    .then(function(result) {
+        const releaseName = postpublish_utils.getReleaseName(subPackageName, result.version);
+        const assets = [];
+        return postpublish_utils.publishReleaseNotes(result.tag, releaseName, assets);
+    })
+    .catch (function(err) {
+        throw err;
+    });
diff --git a/packages/utils/CHANGELOG.md b/packages/utils/CHANGELOG.md
new file mode 100644
index 000000000..b4cce6be0
--- /dev/null
+++ b/packages/utils/CHANGELOG.md
@@ -0,0 +1,4 @@
+# CHANGELOG
+
+vx.x.x
+------------------------
diff --git a/packages/utils/scripts/postpublish.js b/packages/utils/scripts/postpublish.js
new file mode 100644
index 000000000..7fa452b08
--- /dev/null
+++ b/packages/utils/scripts/postpublish.js
@@ -0,0 +1,14 @@
+const postpublish_utils = require('../../../scripts/postpublish_utils');
+const packageJSON = require('../package.json');
+
+const subPackageName = packageJSON.name;
+
+postpublish_utils.getLatestTagAndVersionAsync(subPackageName)
+    .then(function(result) {
+        const releaseName = postpublish_utils.getReleaseName(subPackageName, result.version);
+        const assets = [];
+        return postpublish_utils.publishReleaseNotes(result.tag, releaseName, assets);
+    })
+    .catch (function(err) {
+        throw err;
+    });
diff --git a/packages/web3-wrapper/CHANGELOG.md b/packages/web3-wrapper/CHANGELOG.md
new file mode 100644
index 000000000..b4cce6be0
--- /dev/null
+++ b/packages/web3-wrapper/CHANGELOG.md
@@ -0,0 +1,4 @@
+# CHANGELOG
+
+vx.x.x
+------------------------
diff --git a/packages/web3-wrapper/scripts/postpublish.js b/packages/web3-wrapper/scripts/postpublish.js
new file mode 100644
index 000000000..7fa452b08
--- /dev/null
+++ b/packages/web3-wrapper/scripts/postpublish.js
@@ -0,0 +1,14 @@
+const postpublish_utils = require('../../../scripts/postpublish_utils');
+const packageJSON = require('../package.json');
+
+const subPackageName = packageJSON.name;
+
+postpublish_utils.getLatestTagAndVersionAsync(subPackageName)
+    .then(function(result) {
+        const releaseName = postpublish_utils.getReleaseName(subPackageName, result.version);
+        const assets = [];
+        return postpublish_utils.publishReleaseNotes(result.tag, releaseName, assets);
+    })
+    .catch (function(err) {
+        throw err;
+    });
diff --git a/packages/website/package.json b/packages/website/package.json
index 9b261c76c..f005668f8 100644
--- a/packages/website/package.json
+++ b/packages/website/package.json
@@ -18,7 +18,7 @@
   "author": "Fabio Berger",
   "license": "Apache-2.0",
   "dependencies": {
-    "0x.js": "0xproject/0x.js/packages/0x.js#0x.js@0.27.1",
+    "0x.js": "0.27.1",
     "@0xproject/subproviders": "^0.1.0",
     "accounting": "^0.4.1",
     "basscss": "^8.0.3",
diff --git a/packages/website/ts/blockchain.ts b/packages/website/ts/blockchain.ts
index 76640a072..172ba6b52 100644
--- a/packages/website/ts/blockchain.ts
+++ b/packages/website/ts/blockchain.ts
@@ -468,8 +468,7 @@ export class Blockchain {
     public destroy() {
         clearInterval(this.zrxPollIntervalId);
         this.web3Wrapper.destroy();
-        // tslint:disable-next-line:no-floating-promises
-        this.stopWatchingExchangeLogFillEventsAsync(); // fire and forget
+        this.stopWatchingExchangeLogFillEvents();
     }
     private async showEtherScanLinkAndAwaitTransactionMinedAsync(
         txHash: string): Promise<TransactionReceiptWithDecodedLogs> {
@@ -485,7 +484,7 @@ export class Blockchain {
     }
     private async rehydrateStoreWithContractEvents() {
         // Ensure we are only ever listening to one set of events
-        await this.stopWatchingExchangeLogFillEventsAsync();
+        this.stopWatchingExchangeLogFillEvents();
 
         if (!this.doesUserAddressExist()) {
             return; // short-circuit
@@ -517,8 +516,6 @@ export class Blockchain {
                 // to rollbar and stop watching when one occurs
                 // tslint:disable-next-line:no-floating-promises
                 errorReporter.reportAsync(err); // fire and forget
-                // tslint:disable-next-line:no-floating-promises
-                this.stopWatchingExchangeLogFillEventsAsync(); // fire and forget
                 return;
             } else {
                 const decodedLog = decodedLogEvent.log;
@@ -593,7 +590,7 @@ export class Blockchain {
             tradeHistoryStorage.setFillsLatestBlock(this.userAddress, this.networkId, blockNumberToSet);
         }
     }
-    private async stopWatchingExchangeLogFillEventsAsync() {
+    private stopWatchingExchangeLogFillEvents(): void {
         this.zeroEx.exchange.unsubscribeAll();
     }
     private async getTokenRegistryTokensByAddressAsync(): Promise<TokenByAddress> {
diff --git a/scripts/postpublish_utils.js b/scripts/postpublish_utils.js
index e9563a51c..c4ca917da 100644
--- a/scripts/postpublish_utils.js
+++ b/scripts/postpublish_utils.js
@@ -1,7 +1,7 @@
 const execAsync = require('async-child-process').execAsync;
 const semverSort = require('semver-sort');
-import {promisify} from '@0xproject/utils';
 const publishRelease = require('publish-release');
+const promisify = require('@0xproject/utils').promisify;
 
 const publishReleaseAsync = promisify(publishRelease);
 const githubPersonalAccessToken = process.env.GITHUB_PERSONAL_ACCESS_TOKEN_0X_JS;
@@ -37,7 +37,7 @@ module.exports = {
             repo: '0x.js',
             tag: tag,
             name: releaseName,
-            notes: 'TODO',
+            notes: 'N/A',
             draft: false,
             prerelease: false,
             reuseRelease: true,
diff --git a/yarn.lock b/yarn.lock
index be7824c93..1eec4f122 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -9,26 +9,6 @@
     jsonschema "^1.2.0"
     lodash.values "^4.3.0"
 
-"0x.js@0xproject/0x.js/packages/0x.js#0x.js@0.27.1":
-  version "0.27.1"
-  resolved "https://registry.yarnpkg.com/0x.js/-/0x.js-0.27.1.tgz#e0dff70e257efbb7f54dddb55dddf2dce0b971ab"
-  dependencies:
-    "@0xproject/assert" "^0.0.6"
-    "@0xproject/json-schemas" "^0.6.9"
-    bignumber.js "~4.1.0"
-    bintrees "^1.0.2"
-    bn.js "4.11.8"
-    compare-versions "^3.0.1"
-    es6-promisify "^5.0.0"
-    ethereumjs-abi "^0.6.4"
-    ethereumjs-blockstream "^2.0.6"
-    ethereumjs-util "^5.1.1"
-    find-versions "^2.0.0"
-    js-sha3 "^0.6.1"
-    lodash "^4.17.4"
-    uuid "^3.1.0"
-    web3 "^0.20.0"
-
 "0x.js@^0.22.6":
   version "0.22.6"
   resolved "https://registry.yarnpkg.com/0x.js/-/0x.js-0.22.6.tgz#bc3ff79b6d71f8cf7fae3c78b2c776cfa79c193a"
@@ -1365,7 +1345,7 @@ bn.js@4.11.7:
   version "4.11.7"
   resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.11.7.tgz#ddb048e50d9482790094c13eb3fcfc833ce7ab46"
 
-bn.js@4.11.8, bn.js@^4.0.0, bn.js@^4.1.0, bn.js@^4.1.1, bn.js@^4.10.0, bn.js@^4.11.3, bn.js@^4.11.6, bn.js@^4.11.7, bn.js@^4.11.8, bn.js@^4.4.0, bn.js@^4.8.0:
+bn.js@^4.0.0, bn.js@^4.1.0, bn.js@^4.1.1, bn.js@^4.10.0, bn.js@^4.11.3, bn.js@^4.11.6, bn.js@^4.11.7, bn.js@^4.11.8, bn.js@^4.4.0, bn.js@^4.8.0:
   version "4.11.8"
   resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.11.8.tgz#2cde09eb5ee341f484746bb0309b3253b1b1442f"