1 files changed, 23 insertions, 6 deletions

diff --git a/packages/instant/src/components/buy_button.tsx b/packages/instant/src/components/buy_button.tsx
index 9e06604e0..13c1dc88c 100644
--- a/packages/instant/src/components/buy_button.tsx
+++ b/packages/instant/src/components/buy_button.tsx
@@ -4,6 +4,9 @@ import * as React from 'react';
 
 import { WEB_3_WRAPPER_TRANSACTION_FAILED_ERROR_MSG_PREFIX } from '../constants';
 import { ColorOption } from '../style/theme';
+import { ZeroExInstantError } from '../types';
+import { getBestAddress } from '../util/address';
+import { balanceUtil } from '../util/balance';
 import { util } from '../util/util';
 import { web3Wrapper } from '../util/web3_wrapper';
 
@@ -12,7 +15,8 @@ import { Button, Text } from './ui';
 export interface BuyButtonProps {
     buyQuote?: BuyQuote;
     assetBuyer?: AssetBuyer;
-    onAwaitingSignature: (buyQuote: BuyQuote) => void;
+    onValidationPending: (buyQuote: BuyQuote) => void;
+    onValidationFail: (buyQuote: BuyQuote, errorMessage: AssetBuyerError | ZeroExInstantError) => void;
     onSignatureDenied: (buyQuote: BuyQuote) => void;
     onBuyProcessing: (buyQuote: BuyQuote, txHash: string) => void;
     onBuySuccess: (buyQuote: BuyQuote, txHash: string) => void;
@@ -42,14 +46,27 @@ export class BuyButton extends React.Component<BuyButtonProps> {
             return;
         }
 
+        this.props.onValidationPending(buyQuote);
+        const takerAddress = await getBestAddress();
+
+        const hasSufficentEth = await balanceUtil.hasSufficentEth(takerAddress, buyQuote, web3Wrapper);
+        if (!hasSufficentEth) {
+            this.props.onValidationFail(buyQuote, ZeroExInstantError.InsufficientETH);
+            return;
+        }
+
         let txHash: string | undefined;
-        this.props.onAwaitingSignature(buyQuote);
         try {
-            txHash = await assetBuyer.executeBuyQuoteAsync(buyQuote);
+            txHash = await assetBuyer.executeBuyQuoteAsync(buyQuote, { takerAddress });
         } catch (e) {
-            if (e instanceof Error && e.message === AssetBuyerError.SignatureRequestDenied) {
-                this.props.onSignatureDenied(buyQuote);
-                return;
+            if (e instanceof Error) {
+                if (e.message === AssetBuyerError.SignatureRequestDenied) {
+                    this.props.onSignatureDenied(buyQuote);
+                    return;
+                } else if (e.message === AssetBuyerError.TransactionValueTooLow) {
+                    this.props.onValidationFail(buyQuote, AssetBuyerError.TransactionValueTooLow);
+                    return;
+                }
             }
             throw e;
         }