feat(instant): Show message if user doesn't have enough ETH

2 files changed, 10 insertions, 1 deletions

diff --git a/packages/instant/src/util/address.ts b/packages/instant/src/util/address.ts
new file mode 100644
index 000000000..97ed30a00
--- /dev/null
+++ b/packages/instant/src/util/address.ts
@@ -0,0 +1,6 @@
+import { web3Wrapper } from '../util/web3_wrapper';
+
+export const getBestAddress = async (): Promise<string> => {
+    const addresses = await web3Wrapper.getAvailableAddressesAsync();
+    return addresses[0];
+};
diff --git a/packages/instant/src/util/error.ts b/packages/instant/src/util/error.ts
index 64c1f4885..5db0c66d2 100644
--- a/packages/instant/src/util/error.ts
+++ b/packages/instant/src/util/error.ts
@@ -2,7 +2,7 @@ import { AssetBuyerError } from '@0x/asset-buyer';
 import { Dispatch } from 'redux';
 
 import { Action, actions } from '../redux/actions';
-import { Asset } from '../types';
+import { Asset, ZeroExInstantError } from '../types';
 
 import { assetUtils } from './asset';
 
@@ -49,6 +49,9 @@ const humanReadableMessageForError = (error: Error, asset?: Asset): string | und
     if (error.message === AssetBuyerError.SignatureRequestDenied) {
         return 'You denied this transaction';
     }
+    if (error.message === ZeroExInstantError.InsufficientBalance) {
+        return "You don't have enough ETH";
+    }
 
     return undefined;
 };