feat(instant): add default gasPrice of 6 gwei to transactions

2 files changed, 5 insertions, 2 deletions

diff --git a/packages/instant/src/components/buy_button.tsx b/packages/instant/src/components/buy_button.tsx
index 129aedaf3..e65e62e47 100644
--- a/packages/instant/src/components/buy_button.tsx
+++ b/packages/instant/src/components/buy_button.tsx
@@ -2,7 +2,7 @@ import { AssetBuyer, AssetBuyerError, BuyQuote } from '@0x/asset-buyer';
 import * as _ from 'lodash';
 import * as React from 'react';
 
-import { WEB_3_WRAPPER_TRANSACTION_FAILED_ERROR_MSG_PREFIX } from '../constants';
+import { DEFAULT_GAS_PRICE, WEB_3_WRAPPER_TRANSACTION_FAILED_ERROR_MSG_PREFIX } from '../constants';
 import { ColorOption } from '../style/theme';
 import { ZeroExInstantError } from '../types';
 import { getBestAddress } from '../util/address';
@@ -57,7 +57,8 @@ export class BuyButton extends React.Component<BuyButtonProps> {
 
         let txHash: string | undefined;
         try {
-            txHash = await assetBuyer.executeBuyQuoteAsync(buyQuote, { takerAddress });
+            const gasPrice = DEFAULT_GAS_PRICE;
+            txHash = await assetBuyer.executeBuyQuoteAsync(buyQuote, { gasPrice, takerAddress });
         } catch (e) {
             if (e instanceof Error) {
                 if (e.message === AssetBuyerError.SignatureRequestDenied) {
diff --git a/packages/instant/src/constants.ts b/packages/instant/src/constants.ts
index e4281d54a..47cb2eaeb 100644
--- a/packages/instant/src/constants.ts
+++ b/packages/instant/src/constants.ts
@@ -3,3 +3,5 @@ export const BIG_NUMBER_ZERO = new BigNumber(0);
 export const ETH_DECIMALS = 18;
 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);