2 files changed, 11 insertions, 4 deletions
diff --git a/src/contract_wrappers/exchange_wrapper.ts b/src/contract_wrappers/exchange_wrapper.ts
index 2353c826a..fa4b5904b 100644
--- a/src/contract_wrappers/exchange_wrapper.ts
+++ b/src/contract_wrappers/exchange_wrapper.ts
@@ -297,8 +297,8 @@ export class ExchangeWrapper extends ContractWrapper {
      *                                  Must be available via the supplied Web3.Provider passed to 0x.js.
      */
     @decorators.contractCallErrorHandler
-    public async batchFillOrderAsync(orderFillRequests: OrderFillRequest[],
-                                     shouldCheckTransfer: boolean, takerAddress: string): Promise<void> {
+    public async batchFillOrdersAsync(orderFillRequests: OrderFillRequest[],
+                                      shouldCheckTransfer: boolean, takerAddress: string): Promise<void> {
         assert.doesConformToSchema('orderFillRequests', orderFillRequests, orderFillRequestsSchema);
         const exchangeContractAddresses = _.map(
             orderFillRequests,
@@ -520,7 +520,7 @@ export class ExchangeWrapper extends ContractWrapper {
      *                                      interface.
      */
     @decorators.contractCallErrorHandler
-    public async batchCancelOrderAsync(orderCancellationRequests: OrderCancellationRequest[]): Promise<void> {
+    public async batchCancelOrdersAsync(orderCancellationRequests: OrderCancellationRequest[]): Promise<void> {
         assert.doesConformToSchema('orderCancellationRequests', orderCancellationRequests,
                                    orderCancellationRequestsSchema);
         const exchangeContractAddresses = _.map(
diff --git a/src/web3_wrapper.ts b/src/web3_wrapper.ts
index 630f0bef3..61bac45c9 100644
--- a/src/web3_wrapper.ts
+++ b/src/web3_wrapper.ts
@@ -5,11 +5,13 @@ import promisify = require('es6-promisify');
 
 export class Web3Wrapper {
     private web3: Web3;
+    private networkIdIfExists?: number;
     constructor(provider: Web3.Provider) {
         this.web3 = new Web3();
         this.web3.setProvider(provider);
     }
     public setProvider(provider: Web3.Provider) {
+        delete this.networkIdIfExists;
         this.web3.setProvider(provider);
     }
     public isAddress(address: string): boolean {
@@ -27,9 +29,14 @@ export class Web3Wrapper {
         return this.web3.currentProvider;
     }
     public async getNetworkIdIfExistsAsync(): Promise<number|undefined> {
+        if (!_.isUndefined(this.networkIdIfExists)) {
+          return this.networkIdIfExists;
+        }
+
         try {
             const networkId = await this.getNetworkAsync();
-            return Number(networkId);
+            this.networkIdIfExists = Number(networkId);
+            return this.networkIdIfExists;
         } catch (err) {
             return undefined;
         }