Merge branch 'development' into feature/instant/fixed-orders-in-render-method

* development:
  Has Sufficient Funds/Balance -> Has Sufficient ETH
  When transaction too low, treat as validation error. also modify callback: errorMessage could be AssetBuyError as well
  onPendingValidation -> onValidationPending
  linting
  Simpler way of validaitng has enough eth
  questionmark syntax instead of '| undefined'
  Validate enough ETH when user clicks buy
  acccount for no address
  move funct into util
  move imports
  yarn.lock changes
  feat(instant): Show message if user doesn't have enough ETH
  ethDecimals -> ETH_DECIMALS

1 files changed, 13 insertions, 0 deletions

diff --git a/packages/instant/src/util/balance.ts b/packages/instant/src/util/balance.ts
new file mode 100644
index 000000000..533656858
--- /dev/null
+++ b/packages/instant/src/util/balance.ts
@@ -0,0 +1,13 @@
+import { BuyQuote } from '@0x/asset-buyer';
+import { Web3Wrapper } from '@0x/web3-wrapper';
+import * as _ from 'lodash';
+
+export const balanceUtil = {
+    hasSufficentEth: async (takerAddress: string | undefined, buyQuote: BuyQuote, web3Wrapper: Web3Wrapper) => {
+        if (_.isUndefined(takerAddress)) {
+            return false;
+        }
+        const balanceWei = await web3Wrapper.getBalanceInWeiAsync(takerAddress);
+        return balanceWei >= buyQuote.worstCaseQuoteInfo.totalEthAmount;
+    },
+};