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

9 files changed, 73 insertions, 26 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;
         }
diff --git a/packages/instant/src/components/buy_order_state_buttons.tsx b/packages/instant/src/components/buy_order_state_buttons.tsx
index 758eabcb7..d01e9ff57 100644
--- a/packages/instant/src/components/buy_order_state_buttons.tsx
+++ b/packages/instant/src/components/buy_order_state_buttons.tsx
@@ -1,4 +1,4 @@
-import { AssetBuyer, BuyQuote } from '@0x/asset-buyer';
+import { AssetBuyer, AssetBuyerError, BuyQuote } from '@0x/asset-buyer';
 import * as React from 'react';
 
 import { BuyButton } from '../components/buy_button';
@@ -7,7 +7,7 @@ import { Flex } from '../components/ui/flex';
 
 import { PlacingOrderButton } from '../components/placing_order_button';
 import { ColorOption } from '../style/theme';
-import { OrderProcessState } from '../types';
+import { OrderProcessState, ZeroExInstantError } from '../types';
 
 import { Button } from './ui/button';
 import { Text } from './ui/text';
@@ -17,7 +17,8 @@ export interface BuyOrderStateButtonProps {
     buyOrderProcessingState: OrderProcessState;
     assetBuyer?: AssetBuyer;
     onViewTransaction: () => void;
-    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;
@@ -45,7 +46,7 @@ export const BuyOrderStateButtons: React.StatelessComponent<BuyOrderStateButtonP
         props.buyOrderProcessingState === OrderProcessState.PROCESSING
     ) {
         return <SecondaryButton onClick={props.onViewTransaction}>View Transaction</SecondaryButton>;
-    } else if (props.buyOrderProcessingState === OrderProcessState.AWAITING_SIGNATURE) {
+    } else if (props.buyOrderProcessingState === OrderProcessState.VALIDATING) {
         return <PlacingOrderButton />;
     }
 
@@ -53,7 +54,8 @@ export const BuyOrderStateButtons: React.StatelessComponent<BuyOrderStateButtonP
         <BuyButton
             buyQuote={props.buyQuote}
             assetBuyer={props.assetBuyer}
-            onAwaitingSignature={props.onAwaitingSignature}
+            onValidationPending={props.onValidationPending}
+            onValidationFail={props.onValidationFail}
             onSignatureDenied={props.onSignatureDenied}
             onBuyProcessing={props.onBuyProcessing}
             onBuySuccess={props.onBuySuccess}
diff --git a/packages/instant/src/constants.ts b/packages/instant/src/constants.ts
index 48d0d4aa2..e4281d54a 100644
--- a/packages/instant/src/constants.ts
+++ b/packages/instant/src/constants.ts
@@ -1,5 +1,5 @@
 import { BigNumber } from '@0x/utils';
 export const BIG_NUMBER_ZERO = new BigNumber(0);
-export const ethDecimals = 18;
+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';
diff --git a/packages/instant/src/containers/selected_asset_buy_order_state_buttons.ts b/packages/instant/src/containers/selected_asset_buy_order_state_buttons.ts
index 10734df96..500d6b88a 100644
--- a/packages/instant/src/containers/selected_asset_buy_order_state_buttons.ts
+++ b/packages/instant/src/containers/selected_asset_buy_order_state_buttons.ts
@@ -1,17 +1,16 @@
-import { AssetBuyer, BuyQuote } from '@0x/asset-buyer';
+import { AssetBuyer, AssetBuyerError, BuyQuote } from '@0x/asset-buyer';
 import * as _ from 'lodash';
 import * as React from 'react';
 import { connect } from 'react-redux';
 import { Dispatch } from 'redux';
 
+import { BuyOrderStateButtons } from '../components/buy_order_state_buttons';
 import { Action, actions } from '../redux/actions';
 import { State } from '../redux/reducer';
-import { OrderProcessState, OrderState } from '../types';
+import { OrderProcessState, OrderState, ZeroExInstantError } from '../types';
 import { errorFlasher } from '../util/error_flasher';
 import { etherscanUtil } from '../util/etherscan';
 
-import { BuyOrderStateButtons } from '../components/buy_order_state_buttons';
-
 interface ConnectedState {
     buyQuote?: BuyQuote;
     buyOrderProcessingState: OrderProcessState;
@@ -20,12 +19,13 @@ interface ConnectedState {
 }
 
 interface ConnectedDispatch {
-    onAwaitingSignature: (buyQuote: BuyQuote) => void;
+    onValidationPending: (buyQuote: BuyQuote) => void;
     onSignatureDenied: (buyQuote: BuyQuote) => void;
     onBuyProcessing: (buyQuote: BuyQuote, txHash: string) => void;
     onBuySuccess: (buyQuote: BuyQuote, txHash: string) => void;
     onBuyFailure: (buyQuote: BuyQuote, txHash: string) => void;
     onRetry: () => void;
+    onValidationFail: (buyQuote: BuyQuote, errorMessage: AssetBuyerError | ZeroExInstantError) => void;
 }
 export interface SelectedAssetBuyOrderStateButtons {}
 const mapStateToProps = (state: State, _ownProps: SelectedAssetBuyOrderStateButtons): ConnectedState => ({
@@ -55,8 +55,8 @@ const mapDispatchToProps = (
     dispatch: Dispatch<Action>,
     ownProps: SelectedAssetBuyOrderStateButtons,
 ): ConnectedDispatch => ({
-    onAwaitingSignature: (buyQuote: BuyQuote) => {
-        const newOrderState: OrderState = { processState: OrderProcessState.AWAITING_SIGNATURE };
+    onValidationPending: (buyQuote: BuyQuote) => {
+        const newOrderState: OrderState = { processState: OrderProcessState.VALIDATING };
         dispatch(actions.updateBuyOrderState(newOrderState));
     },
     onBuyProcessing: (buyQuote: BuyQuote, txHash: string) => {
@@ -72,6 +72,15 @@ const mapDispatchToProps = (
         const errorMessage = 'You denied this transaction';
         errorFlasher.flashNewErrorMessage(dispatch, errorMessage);
     },
+    onValidationFail: (buyQuote, error) => {
+        dispatch(actions.updateBuyOrderState({ processState: OrderProcessState.NONE }));
+        if (error === ZeroExInstantError.InsufficientETH) {
+            const errorMessage = "You don't have enough ETH";
+            errorFlasher.flashNewErrorMessage(dispatch, errorMessage);
+        } else {
+            errorFlasher.flashNewErrorMessage(dispatch);
+        }
+    },
     onRetry: () => {
         dispatch(actions.resetAmount());
     },
diff --git a/packages/instant/src/containers/selected_erc20_asset_amount_input.ts b/packages/instant/src/containers/selected_erc20_asset_amount_input.ts
index 1e93a6deb..4767b15d4 100644
--- a/packages/instant/src/containers/selected_erc20_asset_amount_input.ts
+++ b/packages/instant/src/containers/selected_erc20_asset_amount_input.ts
@@ -7,6 +7,7 @@ import * as React from 'react';
 import { connect } from 'react-redux';
 import { Dispatch } from 'redux';
 
+import { ERC20AssetAmountInput } from '../components/erc20_asset_amount_input';
 import { Action, actions } from '../redux/actions';
 import { State } from '../redux/reducer';
 import { ColorOption } from '../style/theme';
@@ -15,8 +16,6 @@ import { assetUtils } from '../util/asset';
 import { BigNumberInput } from '../util/big_number_input';
 import { errorFlasher } from '../util/error_flasher';
 
-import { ERC20AssetAmountInput } from '../components/erc20_asset_amount_input';
-
 export interface SelectedERC20AssetAmountInputProps {
     fontColor?: ColorOption;
     startingFontSizePx: number;
diff --git a/packages/instant/src/types.ts b/packages/instant/src/types.ts
index e02a815f9..336465e43 100644
--- a/packages/instant/src/types.ts
+++ b/packages/instant/src/types.ts
@@ -10,14 +10,14 @@ export enum AsyncProcessState {
 
 export enum OrderProcessState {
     NONE = 'None',
-    AWAITING_SIGNATURE = 'Awaiting Signature',
+    VALIDATING = 'Validating',
     PROCESSING = 'Processing',
     SUCCESS = 'Success',
     FAILURE = 'Failure',
 }
 
 interface OrderStatePreTx {
-    processState: OrderProcessState.NONE | OrderProcessState.AWAITING_SIGNATURE;
+    processState: OrderProcessState.NONE | OrderProcessState.VALIDATING;
 }
 interface OrderStatePostTx {
     processState: OrderProcessState.PROCESSING | OrderProcessState.SUCCESS | OrderProcessState.FAILURE;
@@ -72,4 +72,5 @@ export enum Network {
 
 export enum ZeroExInstantError {
     AssetMetaDataNotAvailable = 'ASSET_META_DATA_NOT_AVAILABLE',
+    InsufficientETH = 'INSUFFICIENT_ETH',
 }
diff --git a/packages/instant/src/util/address.ts b/packages/instant/src/util/address.ts
new file mode 100644
index 000000000..14d42d8c0
--- /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 | undefined> => {
+    const addresses = await web3Wrapper.getAvailableAddressesAsync();
+    return addresses[0];
+};
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;
+    },
+};
diff --git a/packages/instant/src/util/format.ts b/packages/instant/src/util/format.ts
index ca7c01359..4a48dec9d 100644
--- a/packages/instant/src/util/format.ts
+++ b/packages/instant/src/util/format.ts
@@ -2,7 +2,7 @@ import { BigNumber } from '@0x/utils';
 import { Web3Wrapper } from '@0x/web3-wrapper';
 import * as _ from 'lodash';
 
-import { ethDecimals } from '../constants';
+import { ETH_DECIMALS } from '../constants';
 
 export const format = {
     ethBaseAmount: (
@@ -13,7 +13,7 @@ export const format = {
         if (_.isUndefined(ethBaseAmount)) {
             return defaultText;
         }
-        const ethUnitAmount = Web3Wrapper.toUnitAmount(ethBaseAmount, ethDecimals);
+        const ethUnitAmount = Web3Wrapper.toUnitAmount(ethBaseAmount, ETH_DECIMALS);
         return format.ethUnitAmount(ethUnitAmount, decimalPlaces);
     },
     ethUnitAmount: (
@@ -36,7 +36,7 @@ export const format = {
         if (_.isUndefined(ethBaseAmount) || _.isUndefined(ethUsdPrice)) {
             return defaultText;
         }
-        const ethUnitAmount = Web3Wrapper.toUnitAmount(ethBaseAmount, ethDecimals);
+        const ethUnitAmount = Web3Wrapper.toUnitAmount(ethBaseAmount, ETH_DECIMALS);
         return format.ethUnitAmountInUsd(ethUnitAmount, ethUsdPrice, decimalPlaces);
     },
     ethUnitAmountInUsd: (