Merge branch 'master' into fillOrderAsync

package.json

@@ -29,7 +29,8 @@
     "build:commonjs:dev": "tsc; copyfiles -u 2 ./src/artifacts/*.json ../0x.js/lib/src/artifacts;",
     "test:commonjs": "run-s build:commonjs:dev run_mocha",
     "pretest:umd": "run-s clean build:*:dev",
-    "substitute_umd_bundle": "shx rm -rf lib/src && shx mv _bundles lib/src",
+    "substitute_umd_bundle": "npm run remove_src_files_not_used_by_tests; shx mv _bundles/* lib/src",
+    "remove_src_files_not_used_by_tests": "find ./lib/src \\( -path ./lib/src/utils -o -path ./lib/src/schemas -o -path \"./lib/src/types.*\" \\) -prune -o -type f -print | xargs rm",
     "run_mocha": "mocha lib/test/**/*_test.js"
   },
   "config": {

src/web3_wrapper.ts

@@ -57,7 +57,7 @@ export class Web3Wrapper {
     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\}$/i;
+        const zeroHexAddressRegex = /^0x0*$/i;
         const didFindCode = _.isNull(code.match(zeroHexAddressRegex));
         return didFindCode;
     }