Merge pull request #130 from 0xProject/addProxyAddressMethod

Add public TokenTransferProxy address getter

CHANGELOG.md

@@ -4,15 +4,16 @@ v0.9.4 - _TBD_
 ------------------------
     * Add clear error message when checksummed address is passed to a public method (#124)
     * Fixes the description of `shouldThrowOnInsufficientBalanceOrAllowance` in docs (#127)
+    * Add `zeroEx.proxy.getContractAddressAsync` to public interface (#130)
 
 v0.9.3 - _Aug 22, 2017_
 ------------------------
-    * Update contract artifacts to include latest Kovan and Mainnet deploys.
+    * Update contract artifacts to include latest Kovan and Mainnet deploys (#118)
 
 v0.9.2 - _Aug 21, 2017_
 ------------------------
     * *This version was unpublished because of a publishing issue.*
-    * Update contract artifacts to include latest Kovan and Mainnet deploys.
+    * Update contract artifacts to include latest Kovan and Mainnet deploys (#118)
 
 v0.9.1 - _Aug. 16, 2017_
 ------------------------

src/contract_wrappers/exchange_wrapper.ts

@@ -623,7 +623,8 @@ export class ExchangeWrapper extends ContractWrapper {
      */
     public async getContractAddressAsync(): Promise<string> {
         const exchangeInstance = await this._getExchangeContractAsync();
-        return exchangeInstance.address;
+        const exchangeAddress = exchangeInstance.address;
+        return exchangeAddress;
     }
     private async _invalidateContractInstancesAsync(): Promise<void> {
         await this.stopWatchingAllEventsAsync();

src/contract_wrappers/token_transfer_proxy_wrapper.ts

@@ -27,6 +27,16 @@ export class TokenTransferProxyWrapper extends ContractWrapper {
         const authorizedAddresses = await tokenTransferProxyContractInstance.getAuthorizedAddresses.call();
         return authorizedAddresses;
     }
+    /**
+     * Retrieves the Ethereum address of the TokenTransferProxy contract deployed on the network
+     * that the user-passed web3 provider is connected to.
+     * @returns The Ethereum address of the TokenTransferProxy contract being used.
+     */
+    public async getContractAddressAsync(): Promise<string> {
+        const proxyInstance = await this._getTokenTransferProxyContractAsync();
+        const proxyAddress = proxyInstance.address;
+        return proxyAddress;
+    }
     private _invalidateContractInstance(): void {
         delete this._tokenTransferProxyContractIfExists;
     }