5 files changed, 45 insertions, 20 deletions
diff --git a/packages/contract-wrappers/CHANGELOG.json b/packages/contract-wrappers/CHANGELOG.json
index a8572e968..1c9af4971 100644
--- a/packages/contract-wrappers/CHANGELOG.json
+++ b/packages/contract-wrappers/CHANGELOG.json
@@ -9,6 +9,15 @@
         ]
     },
     {
+        "version": "1.0.4",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ],
+        "timestamp": 1537541580
+    },
+    {
         "version": "1.0.3",
         "changes": [
             {
diff --git a/packages/contract-wrappers/CHANGELOG.md b/packages/contract-wrappers/CHANGELOG.md
index 69561213e..3757bd6ba 100644
--- a/packages/contract-wrappers/CHANGELOG.md
+++ b/packages/contract-wrappers/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v1.0.4 - _September 21, 2018_
+
+    * Dependencies updated
+
 ## v1.0.3 - _September 19, 2018_
 
     * Drastically reduce the bundle size by removing unused parts of included contract artifacts.
diff --git a/packages/contract-wrappers/package.json b/packages/contract-wrappers/package.json
index 4ec93928c..8f60759f6 100644
--- a/packages/contract-wrappers/package.json
+++ b/packages/contract-wrappers/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0xproject/contract-wrappers",
-    "version": "1.0.3",
+    "version": "1.0.4",
     "description": "Smart TS wrappers for 0x smart contracts",
     "keywords": [
         "0xproject",
@@ -41,14 +41,14 @@
         "node": ">=6.0.0"
     },
     "devDependencies": {
-        "@0xproject/abi-gen": "^1.0.8",
-        "@0xproject/dev-utils": "^1.0.7",
-        "@0xproject/migrations": "^1.0.9",
-        "@0xproject/subproviders": "^2.0.2",
+        "@0xproject/abi-gen": "^1.0.9",
+        "@0xproject/dev-utils": "^1.0.8",
+        "@0xproject/migrations": "^1.0.10",
+        "@0xproject/subproviders": "^2.0.3",
         "@0xproject/tslint-config": "^1.0.7",
         "@types/lodash": "4.14.104",
         "@types/mocha": "^2.2.42",
-        "@types/node": "^8.0.53",
+        "@types/node": "*",
         "@types/sinon": "^2.2.2",
         "@types/uuid": "^3.4.2",
         "@types/web3-provider-engine": "^14.0.0",
@@ -72,16 +72,16 @@
         "web3-provider-engine": "14.0.6"
     },
     "dependencies": {
-        "@0xproject/assert": "^1.0.8",
-        "@0xproject/base-contract": "^2.0.2",
-        "@0xproject/fill-scenarios": "^1.0.2",
-        "@0xproject/json-schemas": "^1.0.1",
-        "@0xproject/order-utils": "^1.0.2",
-        "@0xproject/types": "^1.0.1",
-        "@0xproject/typescript-typings": "^2.0.0",
-        "@0xproject/utils": "^1.0.8",
-        "@0xproject/web3-wrapper": "^2.0.2",
-        "ethereum-types": "^1.0.6",
+        "@0xproject/assert": "^1.0.9",
+        "@0xproject/base-contract": "^2.0.3",
+        "@0xproject/fill-scenarios": "^1.0.3",
+        "@0xproject/json-schemas": "^1.0.2",
+        "@0xproject/order-utils": "^1.0.3",
+        "@0xproject/types": "^1.0.2",
+        "@0xproject/typescript-typings": "^2.0.1",
+        "@0xproject/utils": "^1.0.9",
+        "@0xproject/web3-wrapper": "^2.0.3",
+        "ethereum-types": "^1.0.7",
         "ethereumjs-blockstream": "6.0.0",
         "ethereumjs-util": "^5.1.1",
         "ethers": "3.0.22",
diff --git a/packages/contract-wrappers/src/contract_wrappers/contract_wrapper.ts b/packages/contract-wrappers/src/contract_wrappers/contract_wrapper.ts
index 19de17c0a..19a882712 100644
--- a/packages/contract-wrappers/src/contract_wrappers/contract_wrapper.ts
+++ b/packages/contract-wrappers/src/contract_wrappers/contract_wrapper.ts
@@ -2,6 +2,7 @@ import { AbiDecoder, intervalUtils, logUtils } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import {
     BlockParamLiteral,
+    BlockWithoutTransactionData,
     ContractAbi,
     ContractArtifact,
     FilterObject,
@@ -174,7 +175,7 @@ export abstract class ContractWrapper {
             throw new Error(ContractWrappersError.SubscriptionAlreadyPresent);
         }
         this._blockAndLogStreamerIfExists = new BlockAndLogStreamer(
-            this._web3Wrapper.getBlockAsync.bind(this._web3Wrapper),
+            this._getBlockOrNullAsync.bind(this),
             this._web3Wrapper.getLogsAsync.bind(this._web3Wrapper),
             ContractWrapper._onBlockAndLogStreamerError.bind(this, isVerbose),
         );
@@ -194,6 +195,14 @@ export abstract class ContractWrapper {
             this._onLogStateChanged.bind(this, isRemoved),
         );
     }
+    // This method only exists in order to comply with the expected interface of Blockstream's constructor
+    private async _getBlockOrNullAsync(): Promise<BlockWithoutTransactionData | null> {
+        const blockIfExists = await this._web3Wrapper.getBlockIfExistsAsync.bind(this._web3Wrapper);
+        if (_.isUndefined(blockIfExists)) {
+            return null;
+        }
+        return blockIfExists;
+    }
     // HACK: This should be a package-scoped method (which doesn't exist in TS)
     // We don't want this method available in the public interface for all classes
     // who inherit from ContractWrapper, and it is only used by the internal implementation
@@ -212,11 +221,14 @@ export abstract class ContractWrapper {
         delete this._blockAndLogStreamerIfExists;
     }
     private async _reconcileBlockAsync(): Promise<void> {
-        const latestBlock = await this._web3Wrapper.getBlockAsync(BlockParamLiteral.Latest);
+        const latestBlockIfExists = await this._web3Wrapper.getBlockIfExistsAsync(BlockParamLiteral.Latest);
+        if (_.isUndefined(latestBlockIfExists)) {
+            return; // noop
+        }
         // We need to coerce to Block type cause Web3.Block includes types for mempool blocks
         if (!_.isUndefined(this._blockAndLogStreamerIfExists)) {
             // If we clear the interval while fetching the block - this._blockAndLogStreamer will be undefined
-            await this._blockAndLogStreamerIfExists.reconcileNewBlock((latestBlock as any) as Block);
+            await this._blockAndLogStreamerIfExists.reconcileNewBlock((latestBlockIfExists as any) as Block);
         }
     }
 }
diff --git a/packages/contract-wrappers/test/subscription_test.ts b/packages/contract-wrappers/test/subscription_test.ts
index 81b9012bd..68ef7225e 100644
--- a/packages/contract-wrappers/test/subscription_test.ts
+++ b/packages/contract-wrappers/test/subscription_test.ts
@@ -61,7 +61,7 @@ describe('SubscriptionTest', () => {
                     callback,
                 );
                 stubs = [
-                    Sinon.stub((contractWrappers as any)._web3Wrapper, 'getBlockAsync').throws(
+                    Sinon.stub((contractWrappers as any)._web3Wrapper, 'getBlockIfExistsAsync').throws(
                         new Error('JSON RPC error'),
                     ),
                 ];