From d36acc7ec740b0dd98eb3994c240b261eeeeb40b Mon Sep 17 00:00:00 2001
From: Jacob Evans <jacob@dekz.net>
Date: Tue, 30 Jun 2020 17:41:52 +1000
Subject: [PATCH] fix: asset-swapper EthGasStation proxy url (#2614)

---
 packages/asset-swapper/CHANGELOG.json               | 13 +++++++++++++
 packages/asset-swapper/src/constants.ts             |  5 ++---
 .../asset-swapper/src/utils/protocol_fee_utils.ts   |  2 +-
 3 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/packages/asset-swapper/CHANGELOG.json b/packages/asset-swapper/CHANGELOG.json
index cd1850d347..51b5e66081 100644
--- a/packages/asset-swapper/CHANGELOG.json
+++ b/packages/asset-swapper/CHANGELOG.json
@@ -1,4 +1,17 @@
 [
+    {
+        "version": "4.6.0",
+        "changes": [
+            {
+                "note": "Use internal Eth Gas Station proxy",
+                "pr": 2614
+            },
+            {
+                "note": "Renamed RFQT request parameters",
+                "pr": 2582
+            }
+        ]
+    },
     {
         "version": "4.5.0",
         "changes": [
diff --git a/packages/asset-swapper/src/constants.ts b/packages/asset-swapper/src/constants.ts
index c556a3c4b2..4c2dd3ebd3 100644
--- a/packages/asset-swapper/src/constants.ts
+++ b/packages/asset-swapper/src/constants.ts
@@ -11,10 +11,9 @@ import {
     SwapQuoteRequestOpts,
     SwapQuoterOpts,
 } from './types';
-
 import { DEFAULT_GET_MARKET_ORDERS_OPTS } from './utils/market_operation_utils/constants';
 
-const ETH_GAS_STATION_API_BASE_URL = 'https://ethgasstation.info';
+const ETH_GAS_STATION_API_URL = 'https://ethgasstation.api.0x.org/api/ethgasAPI.json';
 const NULL_BYTES = '0x';
 const NULL_ERC20_ASSET_DATA = '0xf47261b00000000000000000000000000000000000000000000000000000000000000000';
 const NULL_ADDRESS = '0x0000000000000000000000000000000000000000';
@@ -72,7 +71,7 @@ const DEFAULT_RFQT_REQUEST_OPTS: Partial<RfqtRequestOpts> = {
 };
 
 export const constants = {
-    ETH_GAS_STATION_API_BASE_URL,
+    ETH_GAS_STATION_API_URL,
     PROTOCOL_FEE_MULTIPLIER,
     NULL_BYTES,
     ZERO_AMOUNT: new BigNumber(0),
diff --git a/packages/asset-swapper/src/utils/protocol_fee_utils.ts b/packages/asset-swapper/src/utils/protocol_fee_utils.ts
index 11c42cae9b..0bcaba2522 100644
--- a/packages/asset-swapper/src/utils/protocol_fee_utils.ts
+++ b/packages/asset-swapper/src/utils/protocol_fee_utils.ts
@@ -35,7 +35,7 @@ export class ProtocolFeeUtils {
     // tslint:disable-next-line: prefer-function-over-method
     private async _getGasPriceFromGasStationOrThrowAsync(): Promise<BigNumber> {
         try {
-            const res = await fetch(`${constants.ETH_GAS_STATION_API_BASE_URL}/json/ethgasAPI.json`);
+            const res = await fetch(constants.ETH_GAS_STATION_API_URL);
             const gasInfo = await res.json();
             // Eth Gas Station result is gwei * 10
             // tslint:disable-next-line:custom-no-magic-numbers