Introduce constants for eth gas station and coinbase

3 files changed, 9 insertions, 7 deletions

diff --git a/packages/instant/src/constants.ts b/packages/instant/src/constants.ts
index 47cb2eaeb..424f35ecb 100644
--- a/packages/instant/src/constants.ts
+++ b/packages/instant/src/constants.ts
@@ -5,3 +5,5 @@ export const DEFAULT_ZERO_EX_CONTAINER_SELECTOR = '#zeroExInstantContainer';
 export const WEB_3_WRAPPER_TRANSACTION_FAILED_ERROR_MSG_PREFIX = 'Transaction failed';
 export const GWEI_IN_WEI = new BigNumber(1000000000);
 export const DEFAULT_GAS_PRICE = GWEI_IN_WEI.mul(6);
+export const ETH_GAS_STATION_API_BASE_URL = 'https://ethgasstation.info';
+export const COINBASE_API_BASE_URL = 'https://api.coinbase.com/v2';
diff --git a/packages/instant/src/util/coinbase_api.ts b/packages/instant/src/util/coinbase_api.ts
index 080421f98..32401e423 100644
--- a/packages/instant/src/util/coinbase_api.ts
+++ b/packages/instant/src/util/coinbase_api.ts
@@ -1,9 +1,10 @@
 import { BigNumber } from '@0x/utils';
 
-const baseEndpoint = 'https://api.coinbase.com/v2';
+import { COINBASE_API_BASE_URL } from '../constants';
+
 export const coinbaseApi = {
     getEthUsdPrice: async (): Promise<BigNumber> => {
-        const res = await fetch(`${baseEndpoint}/prices/ETH-USD/buy`);
+        const res = await fetch(`${COINBASE_API_BASE_URL}/prices/ETH-USD/buy`);
         const resJson = await res.json();
         return new BigNumber(resJson.data.amount);
     },
diff --git a/packages/instant/src/util/gas_price_estimator.ts b/packages/instant/src/util/gas_price_estimator.ts
index 9eccfe510..818bf6f92 100644
--- a/packages/instant/src/util/gas_price_estimator.ts
+++ b/packages/instant/src/util/gas_price_estimator.ts
@@ -1,8 +1,8 @@
 import { BigNumber } from '@0x/utils';
 
-import { DEFAULT_GAS_PRICE } from '../constants';
+import { DEFAULT_GAS_PRICE, ETH_GAS_STATION_API_BASE_URL } from '../constants';
 
-interface GasStationResult {
+interface EthGasStationResult {
     average: number;
     fastestWait: number;
     fastWait: number;
@@ -16,10 +16,9 @@ interface GasStationResult {
     safeLow: number;
 }
 
-const endpointUrl = 'https://ethgasstation.info/json/ethgasAPI.json';
 const fetchFastAmountInWei = async () => {
-    const res = await fetch(endpointUrl);
-    const gasInfo = (await res.json()) as GasStationResult;
+    const res = await fetch(`${ETH_GAS_STATION_API_BASE_URL}/json/ethgasAPI.json`);
+    const gasInfo = (await res.json()) as EthGasStationResult;
     const gasPriceInGwei = new BigNumber(gasInfo.fast / 10);
     return gasPriceInGwei.mul(1000000000);
 };