3 files changed, 46 insertions, 46 deletions

diff --git a/packages/website/ts/utils/backend_client.ts b/packages/website/ts/utils/backend_client.ts
index fdbb3e03a..63e06fda7 100644
--- a/packages/website/ts/utils/backend_client.ts
+++ b/packages/website/ts/utils/backend_client.ts
@@ -1,16 +1,8 @@
-import { BigNumber, logUtils } from '@0xproject/utils';
 import * as _ from 'lodash';
-import * as queryString from 'query-string';
 
-import {
-    ArticlesBySection,
-    ItemByAddress,
-    WebsiteBackendGasInfo,
-    WebsiteBackendPriceInfo,
-    WebsiteBackendRelayerInfo,
-} from 'ts/types';
+import { ArticlesBySection, WebsiteBackendGasInfo, WebsiteBackendPriceInfo, WebsiteBackendRelayerInfo } from 'ts/types';
 import { configs } from 'ts/utils/configs';
-import { errorReporter } from 'ts/utils/error_reporter';
+import { fetchUtils } from 'ts/utils/fetch_utils';
 
 const ETH_GAS_STATION_ENDPOINT = '/eth_gas_station';
 const PRICES_ENDPOINT = '/prices';
@@ -19,52 +11,26 @@ const WIKI_ENDPOINT = '/wiki';
 
 export const backendClient = {
     async getGasInfoAsync(): Promise<WebsiteBackendGasInfo> {
-        const result = await requestAsync(ETH_GAS_STATION_ENDPOINT);
+        const result = await fetchUtils.requestAsync(configs.BACKEND_BASE_URL, ETH_GAS_STATION_ENDPOINT);
         return result;
     },
-    async getPriceInfosAsync(tokenAddresses: string[]): Promise<WebsiteBackendPriceInfo[]> {
-        if (_.isEmpty(tokenAddresses)) {
-            return [];
+    async getPriceInfoAsync(tokenSymbols: string[]): Promise<WebsiteBackendPriceInfo> {
+        if (_.isEmpty(tokenSymbols)) {
+            return {};
         }
-        const joinedTokenAddresses = tokenAddresses.join(',');
+        const joinedTokenSymbols = tokenSymbols.join(',');
         const queryParams = {
-            tokens: joinedTokenAddresses,
+            tokens: joinedTokenSymbols,
         };
-        const result = await requestAsync(PRICES_ENDPOINT, queryParams);
+        const result = await fetchUtils.requestAsync(configs.BACKEND_BASE_URL, PRICES_ENDPOINT, queryParams);
         return result;
     },
     async getRelayerInfosAsync(): Promise<WebsiteBackendRelayerInfo[]> {
-        const result = await requestAsync(RELAYERS_ENDPOINT);
+        const result = await fetchUtils.requestAsync(configs.BACKEND_BASE_URL, RELAYERS_ENDPOINT);
         return result;
     },
     async getWikiArticlesBySectionAsync(): Promise<ArticlesBySection> {
-        const result = await requestAsync(WIKI_ENDPOINT);
+        const result = await fetchUtils.requestAsync(configs.BACKEND_BASE_URL, WIKI_ENDPOINT);
         return result;
     },
 };
-
-async function requestAsync(endpoint: string, queryParams?: object): Promise<any> {
-    const query = queryStringFromQueryParams(queryParams);
-    const url = `${configs.BACKEND_BASE_URL}${endpoint}${query}`;
-    const response = await fetch(url);
-    if (response.status !== 200) {
-        const errorText = `Error requesting url: ${url}, ${response.status}: ${response.statusText}`;
-        logUtils.log(errorText);
-        const error = Error(errorText);
-        // tslint:disable-next-line:no-floating-promises
-        errorReporter.reportAsync(error);
-        throw error;
-    }
-    const result = await response.json();
-    return result;
-}
-
-function queryStringFromQueryParams(queryParams?: object): string {
-    // if params are undefined or empty, return an empty string
-    if (_.isUndefined(queryParams) || _.isEmpty(queryParams)) {
-        return '';
-    }
-    // stringify the formatted object
-    const stringifiedParams = queryString.stringify(queryParams);
-    return `?${stringifiedParams}`;
-}
diff --git a/packages/website/ts/utils/fetch_utils.ts b/packages/website/ts/utils/fetch_utils.ts
new file mode 100644
index 000000000..d2e902db5
--- /dev/null
+++ b/packages/website/ts/utils/fetch_utils.ts
@@ -0,0 +1,33 @@
+import { logUtils } from '@0xproject/utils';
+import * as _ from 'lodash';
+import * as queryString from 'query-string';
+
+import { errorReporter } from 'ts/utils/error_reporter';
+
+export const fetchUtils = {
+    async requestAsync(baseUrl: string, path: string, queryParams?: object): Promise<any> {
+        const query = queryStringFromQueryParams(queryParams);
+        const url = `${baseUrl}${path}${query}`;
+        const response = await fetch(url);
+        if (response.status !== 200) {
+            const errorText = `Error requesting url: ${url}, ${response.status}: ${response.statusText}`;
+            logUtils.log(errorText);
+            const error = Error(errorText);
+            // tslint:disable-next-line:no-floating-promises
+            errorReporter.reportAsync(error);
+            throw error;
+        }
+        const result = await response.json();
+        return result;
+    },
+};
+
+function queryStringFromQueryParams(queryParams?: object): string {
+    // if params are undefined or empty, return an empty string
+    if (_.isUndefined(queryParams) || _.isEmpty(queryParams)) {
+        return '';
+    }
+    // stringify the formatted object
+    const stringifiedParams = queryString.stringify(queryParams);
+    return `?${stringifiedParams}`;
+}
diff --git a/packages/website/ts/utils/utils.ts b/packages/website/ts/utils/utils.ts
index 53d60b3ce..0d77b9e72 100644
--- a/packages/website/ts/utils/utils.ts
+++ b/packages/website/ts/utils/utils.ts
@@ -1,4 +1,5 @@
 import { ECSignature, ExchangeContractErrs, ZeroEx, ZeroExError } from '0x.js';
+import { OrderError } from '@0xproject/order-utils';
 import { constants as sharedConstants, EtherscanLinkSuffixes, Networks } from '@0xproject/react-shared';
 import { Provider } from '@0xproject/types';
 import { BigNumber } from '@0xproject/utils';
@@ -202,7 +203,7 @@ export const utils = {
             [ZeroExError.ZRXContractDoesNotExist]: 'ZRX contract does not exist',
             [ZeroExError.UnhandledError]: 'Unhandled error occured',
             [ZeroExError.UserHasNoAssociatedAddress]: 'User has no addresses available',
-            [ZeroExError.InvalidSignature]: 'Order signature is not valid',
+            [OrderError.InvalidSignature]: 'Order signature is not valid',
             [ZeroExError.ContractNotDeployedOnNetwork]: 'Contract is not deployed on the detected network',
             [ZeroExError.InvalidJump]: 'Invalid jump occured while executing the transaction',
             [ZeroExError.OutOfGas]: 'Transaction ran out of gas',