1 files changed, 6 insertions, 4 deletions
diff --git a/src/web3_wrapper.ts b/src/web3_wrapper.ts
index 1ed1c0b29..361f28476 100644
--- a/src/web3_wrapper.ts
+++ b/src/web3_wrapper.ts
@@ -11,6 +11,9 @@ export class Web3Wrapper {
         this.web3 = new Web3();
         this.web3.setProvider(web3.currentProvider);
     }
+    public setProvider(provider: Web3.Provider) {
+        this.web3.setProvider(provider);
+    }
     public isAddress(address: string): boolean {
         return this.web3.isAddress(address);
     }
@@ -56,10 +59,9 @@ 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*$/i;
-        const didFindCode = _.isNull(code.match(zeroHexAddressRegex));
-        return didFindCode;
+        // Regex matches 0x0, 0x00, 0x in order to accommodate poorly implemented clients
+        const codeIsEmpty = /^0x0{0,40}$/i.test(code);
+        return !codeIsEmpty;
     }
     public async signTransactionAsync(address: string, message: string): Promise<string> {
         const signData = await promisify(this.web3.eth.sign)(address, message);