Improved UX for sweeping accounts (#6488)

* Changed max button to checkbox, disabled input if max mode is on, recalculate price according to gas fee if max mode is on

* Disabled insufficient funds message in the modal if max mode is on, displays proper amounts in modal when max mode is on, sets the send amount according to custom gas price after gas modal save, resets the send amount after resetting custom gas price

* Disabled max mode checkbox if gas buttons are loading, refactored gas-modal-page-container

* Implemented new max button & max mode message. Moved insufficient funds error to underneath the send amount field

* Fixed existing integration test to pass, created new tests to ensure send amount field is disabled when max button is clicked and the amount changes when the gas price is changed. Refactored some components

test/integration/lib/send-new-ui.js

@@ -71,11 +71,29 @@ async function runSendFlowTest (assert) {
   assert.equal(sendToAccountAddress, '0x2f8D4a878cFA04A6E60D46362f5644DeAb66572D', 'send to dropdown selects the correct address')
 
   const sendAmountField = await queryAsync($, '.send-v2__form-row:eq(3)')
-  sendAmountField.find('.unit-input')[0].click()
-
   const sendAmountFieldInput = await findAsync(sendAmountField, '.unit-input__input')
+
+  const amountMaxButton = await queryAsync($, '.send-v2__amount-max')
+  amountMaxButton.click()
+  reactTriggerChange(sendAmountField.find('input')[1])
+  assert.equal(sendAmountFieldInput.is(':disabled'), true, 'disabled the send amount input when max mode is on')
+
+  const gasPriceButtonGroup = await queryAsync($, '.gas-price-button-group--small')
+  const gasPriceButton = await gasPriceButtonGroup.find('button')[0]
+  const valueBeforeGasPriceChange = sendAmountFieldInput.prop('value')
+  gasPriceButton.click()
+  reactTriggerChange(sendAmountField.find('input')[1])
+
+  await timeout(1000)
+
+  assert.notEqual(valueBeforeGasPriceChange, sendAmountFieldInput.prop('value'), 'send amount value changes when gas price changes')
+
+  amountMaxButton.click()
+  reactTriggerChange(sendAmountField.find('input')[1])
+
+  sendAmountField.find('.unit-input').click()
   sendAmountFieldInput.val('5.1')
-  reactTriggerChange(sendAmountField.find('input')[0])
+  reactTriggerChange(sendAmountField.find('input')[1])
 
   let errorMessage = await queryAsync($, '.send-v2__error')
   assert.equal(errorMessage[0].textContent, 'Insufficient funds.', 'send should render an insufficient fund error message')

ui/app/components/app/gas-customization/gas-modal-page-container/gas-modal-page-container.container.js

@@ -7,6 +7,8 @@ import {
   setGasPrice,
   createSpeedUpTransaction,
   hideSidebar,
+  updateSendAmount,
+  setGasTotal,
 } from '../../../../store/actions'
 import {
   setCustomGasPrice,
@@ -18,6 +20,7 @@ import {
 } from '../../../../ducks/gas/gas.duck'
 import {
   hideGasButtonGroup,
+  updateSendErrors,
 } from '../../../../ducks/send/send.duck'
 import {
   updateGasAndCalculate,
@@ -45,6 +48,9 @@ import {
   getBasicGasEstimateBlockTime,
   isCustomPriceSafe,
 } from '../../../../selectors/custom-gas'
+import {
+  getTokenBalance,
+} from '../../../../pages/send/send.selectors'
 import {
   submittedPendingTransactionsSelector,
 } from '../../../../selectors/transactions'
@@ -53,6 +59,7 @@ import {
 } from '../../../../helpers/utils/confirm-tx.util'
 import {
   addHexWEIsToDec,
+  subtractHexWEIsToDec,
   decEthToConvertedCurrency as ethTotalToConvertedCurrency,
   decGWEIToHexWEI,
   hexWEIToDecGWEI,
@@ -66,6 +73,8 @@ import {
 } from '../../../../pages/send/send.utils'
 import { addHexPrefix } from 'ethereumjs-util'
 import { getAdjacentGasPrices, extrapolateY } from '../gas-price-chart/gas-price-chart.utils'
+import { getMaxModeOn } from '../../../../pages/send/send-content/send-amount-row/amount-max-button/amount-max-button.selectors'
+import { calcMaxAmount } from '../../../../pages/send/send-content/send-amount-row/amount-max-button/amount-max-button.utils'
 
 const mapStateToProps = (state, ownProps) => {
   const { transaction = {} } = ownProps
@@ -75,8 +84,6 @@ const mapStateToProps = (state, ownProps) => {
   const { gasPrice: currentGasPrice, gas: currentGasLimit, value } = getTxParams(state, transaction.id)
   const customModalGasPriceInHex = getCustomGasPrice(state) || currentGasPrice
   const customModalGasLimitInHex = getCustomGasLimit(state) || currentGasLimit
-  const gasTotal = calcGasTotal(customModalGasLimitInHex, customModalGasPriceInHex)
-
   const customGasTotal = calcGasTotal(customModalGasLimitInHex, customModalGasPriceInHex)
 
   const gasButtonInfo = getRenderableBasicEstimateData(state, customModalGasLimitInHex)
@@ -90,6 +97,8 @@ const mapStateToProps = (state, ownProps) => {
 
   const customGasPrice = calcCustomGasPrice(customModalGasPriceInHex)
 
+  const maxModeOn = getMaxModeOn(state)
+
   const gasPrices = getEstimatedGasPrices(state)
   const estimatedTimes = getEstimatedGasTimes(state)
   const balance = getCurrentEthBalance(state)
@@ -98,9 +107,13 @@ const mapStateToProps = (state, ownProps) => {
   const isMainnet = getIsMainnet(state)
   const showFiat = Boolean(isMainnet || showFiatInTestnets)
 
-  const insufficientBalance = !isBalanceSufficient({
+  const newTotalEth = maxModeOn ? addHexWEIsToRenderableEth(balance, '0x0') : addHexWEIsToRenderableEth(value, customGasTotal)
+
+  const sendAmount = maxModeOn ? subtractHexWEIsFromRenderableEth(balance, customGasTotal) : addHexWEIsToRenderableEth(value, '0x0')
+
+  const insufficientBalance = maxModeOn ? false : !isBalanceSufficient({
     amount: value,
-    gasTotal,
+    gasTotal: customGasTotal,
     balance,
     conversionRate,
   })
@@ -112,10 +125,12 @@ const mapStateToProps = (state, ownProps) => {
     customModalGasLimitInHex,
     customGasPrice,
     customGasLimit: calcCustomGasLimit(customModalGasLimitInHex),
+    customGasTotal,
     newTotalFiat,
     currentTimeEstimate: getRenderableTimeEstimate(customGasPrice, gasPrices, estimatedTimes),
     blockTime: getBasicGasEstimateBlockTime(state),
     customPriceIsSafe: isCustomPriceSafe(state),
+    maxModeOn,
     gasPriceButtonGroupProps: {
       buttonDataLoading,
       defaultActiveButtonIndex: getDefaultActiveButtonIndex(gasButtonInfo, customModalGasPriceInHex),
@@ -129,12 +144,12 @@ const mapStateToProps = (state, ownProps) => {
       estimatedTimesMax: estimatedTimes[0],
     },
     infoRowProps: {
-      originalTotalFiat: addHexWEIsToRenderableFiat(value, gasTotal, currentCurrency, conversionRate),
-      originalTotalEth: addHexWEIsToRenderableEth(value, gasTotal),
+      originalTotalFiat: addHexWEIsToRenderableFiat(value, customGasTotal, currentCurrency, conversionRate),
+      originalTotalEth: addHexWEIsToRenderableEth(value, customGasTotal),
       newTotalFiat: showFiat ? newTotalFiat : '',
-      newTotalEth: addHexWEIsToRenderableEth(value, customGasTotal),
+      newTotalEth,
       transactionFee: addHexWEIsToRenderableEth('0x0', customGasTotal),
-      sendAmount: addHexWEIsToRenderableEth(value, '0x0'),
+      sendAmount,
     },
     isSpeedUp: transaction.status === 'submitted',
     txId: transaction.id,
@@ -142,6 +157,9 @@ const mapStateToProps = (state, ownProps) => {
     gasEstimatesLoading,
     isMainnet,
     isEthereumNetwork: isEthereumNetwork(state),
+    selectedToken: getSelectedToken(state),
+    balance,
+    tokenBalance: getTokenBalance(state),
   }
 }
 
@@ -174,11 +192,16 @@ const mapDispatchToProps = dispatch => {
     hideSidebar: () => dispatch(hideSidebar()),
     fetchGasEstimates: (blockTime) => dispatch(fetchGasEstimates(blockTime)),
     fetchBasicGasAndTimeEstimates: () => dispatch(fetchBasicGasAndTimeEstimates()),
+    setGasTotal: (total) => dispatch(setGasTotal(total)),
+    setAmountToMax: (maxAmountDataObject) => {
+      dispatch(updateSendErrors({ amount: null }))
+      dispatch(updateSendAmount(calcMaxAmount(maxAmountDataObject)))
+    },
   }
 }
 
 const mergeProps = (stateProps, dispatchProps, ownProps) => {
-  const { gasPriceButtonGroupProps, isConfirm, txId, isSpeedUp, insufficientBalance, customGasPrice } = stateProps
+  const { gasPriceButtonGroupProps, isConfirm, txId, isSpeedUp, insufficientBalance, maxModeOn, customGasPrice, customGasTotal, balance, selectedToken, tokenBalance} = stateProps
   const {
     updateCustomGasPrice: dispatchUpdateCustomGasPrice,
     hideGasButtonGroup: dispatchHideGasButtonGroup,
@@ -188,6 +211,7 @@ const mergeProps = (stateProps, dispatchProps, ownProps) => {
     hideSidebar: dispatchHideSidebar,
     cancelAndClose: dispatchCancelAndClose,
     hideModal: dispatchHideModal,
+    setAmountToMax: dispatchSetAmountToMax,
     ...otherDispatchProps
   } = dispatchProps
 
@@ -208,6 +232,14 @@ const mergeProps = (stateProps, dispatchProps, ownProps) => {
         dispatchHideGasButtonGroup()
         dispatchCancelAndClose()
       }
+      if (maxModeOn) {
+        dispatchSetAmountToMax({
+          balance,
+          gasTotal: customGasTotal,
+          selectedToken,
+          tokenBalance,
+        })
+      }
     },
     gasPriceButtonGroupProps: {
       ...gasPriceButtonGroupProps,
@@ -258,6 +290,13 @@ function addHexWEIsToRenderableEth (aHexWEI, bHexWEI) {
   )(aHexWEI, bHexWEI)
 }
 
+function subtractHexWEIsFromRenderableEth (aHexWEI, bHexWei) {
+  return pipe(
+    subtractHexWEIsToDec,
+    formatETHFee
+  )(aHexWEI, bHexWei)
+}
+
 function addHexWEIsToRenderableFiat (aHexWEI, bHexWEI, convertedCurrency, conversionRate) {
   return pipe(
     addHexWEIsToDec,

ui/app/components/app/gas-customization/gas-modal-page-container/tests/gas-modal-page-container-container.test.js

@@ -46,6 +46,10 @@ proxyquire('../gas-modal-page-container.container.js', {
   '../../../../ducks/send/send.duck': sendActionSpies,
   '../../../../selectors/selectors.js': {
     getCurrentEthBalance: (state) => state.metamask.balance || '0x0',
+    getSelectedToken: () => null,
+  },
+  '../../../../pages/send/send.selectors': {
+    getTokenBalance: (state) => state.metamask.send.tokenBalance || '0x0',
   },
 })
 
@@ -68,6 +72,7 @@ describe('gas-modal-page-container container', () => {
             gasLimit: '16',
             gasPrice: '32',
             amount: '64',
+            maxModeOn: false,
           },
           currentCurrency: 'abc',
           conversionRate: 50,
@@ -106,6 +111,7 @@ describe('gas-modal-page-container container', () => {
         },
       }
       const baseExpectedResult = {
+        balance: '0x0',
         isConfirm: true,
         customGasPrice: 4.294967295,
         customGasLimit: 2863311530,
@@ -114,6 +120,7 @@ describe('gas-modal-page-container container', () => {
         blockTime: 12,
         customModalGasLimitInHex: 'aaaaaaaa',
         customModalGasPriceInHex: 'ffffffff',
+        customGasTotal: 'aaaaaaa955555556',
         customPriceIsSafe: true,
         gasChartProps: {
           'currentPrice': 4.294967295,
@@ -142,6 +149,9 @@ describe('gas-modal-page-container container', () => {
         txId: 34,
         isEthereumNetwork: true,
         isMainnet: true,
+        maxModeOn: false,
+        selectedToken: null,
+        tokenBalance: '0x0',
       }
       const baseMockOwnProps = { transaction: { id: 34 } }
       const tests = [
@@ -150,7 +160,7 @@ describe('gas-modal-page-container container', () => {
           mockState: Object.assign({}, baseMockState, {
             metamask: { ...baseMockState.metamask, balance: '0xfffffffffffffffffffff' },
           }),
-          expectedResult: Object.assign({}, baseExpectedResult, { insufficientBalance: false }),
+          expectedResult: Object.assign({}, baseExpectedResult, { balance: '0xfffffffffffffffffffff', insufficientBalance: false }),
           mockOwnProps: baseMockOwnProps,
         },
         {

ui/app/components/ui/currency-input/currency-input.component.js

@@ -18,6 +18,7 @@ export default class CurrencyInput extends PureComponent {
   static propTypes = {
     conversionRate: PropTypes.number,
     currentCurrency: PropTypes.string,
+    maxModeOn: PropTypes.bool,
     nativeCurrency: PropTypes.string,
     onChange: PropTypes.func,
     onBlur: PropTypes.func,
@@ -136,7 +137,7 @@ export default class CurrencyInput extends PureComponent {
   }
 
   render () {
-    const { fiatSuffix, nativeSuffix, ...restProps } = this.props
+    const { fiatSuffix, nativeSuffix, maxModeOn, ...restProps } = this.props
     const { decimalValue } = this.state
 
     return (
@@ -146,6 +147,7 @@ export default class CurrencyInput extends PureComponent {
           onChange={this.handleChange}
           onBlur={this.handleBlur}
           value={decimalValue}
+          maxModeOn={maxModeOn}
           actionComponent={(
             <div
               className="currency-input__swap-component"

ui/app/components/ui/currency-input/currency-input.container.js

@@ -1,18 +1,21 @@
 import { connect } from 'react-redux'
 import CurrencyInput from './currency-input.component'
 import { ETH } from '../../../helpers/constants/common'
+import { getMaxModeOn } from '../../../pages/send/send-content/send-amount-row/amount-max-button/amount-max-button.selectors'
 import {getIsMainnet, preferencesSelector} from '../../../selectors/selectors'
 
 const mapStateToProps = state => {
   const { metamask: { nativeCurrency, currentCurrency, conversionRate } } = state
   const { showFiatInTestnets } = preferencesSelector(state)
   const isMainnet = getIsMainnet(state)
+  const maxModeOn = getMaxModeOn(state)
 
   return {
     nativeCurrency,
     currentCurrency,
     conversionRate,
     hideFiat: (!isMainnet && !showFiatInTestnets),
+    maxModeOn,
   }
 }
 

ui/app/components/ui/currency-input/tests/currency-input.container.test.js

@@ -30,6 +30,9 @@ describe('CurrencyInput container', () => {
             provider: {
               type: 'mainnet',
             },
+            send: {
+              maxModeOn: false,
+            },
           },
         },
         expected: {
@@ -37,6 +40,7 @@ describe('CurrencyInput container', () => {
           currentCurrency: 'usd',
           nativeCurrency: 'ETH',
           hideFiat: false,
+          maxModeOn: false,
         },
       },
       // Test # 2
@@ -53,6 +57,9 @@ describe('CurrencyInput container', () => {
             provider: {
               type: 'rinkeby',
             },
+            send: {
+              maxModeOn: false,
+            },
           },
         },
         expected: {
@@ -60,6 +67,7 @@ describe('CurrencyInput container', () => {
           currentCurrency: 'usd',
           nativeCurrency: 'ETH',
           hideFiat: true,
+          maxModeOn: false,
         },
       },
       // Test # 3
@@ -76,6 +84,9 @@ describe('CurrencyInput container', () => {
             provider: {
               type: 'rinkeby',
             },
+            send: {
+              maxModeOn: false,
+            },
           },
         },
         expected: {
@@ -83,6 +94,7 @@ describe('CurrencyInput container', () => {
           currentCurrency: 'usd',
           nativeCurrency: 'ETH',
           hideFiat: false,
+          maxModeOn: false,
         },
       },
       // Test # 4
@@ -99,6 +111,9 @@ describe('CurrencyInput container', () => {
             provider: {
               type: 'mainnet',
             },
+            send: {
+              maxModeOn: false,
+            },
           },
         },
         expected: {
@@ -106,6 +121,7 @@ describe('CurrencyInput container', () => {
           currentCurrency: 'usd',
           nativeCurrency: 'ETH',
           hideFiat: false,
+          maxModeOn: false,
         },
       },
     ]

ui/app/components/ui/unit-input/index.scss

@@ -42,6 +42,10 @@
     max-width: 22ch;
     height: 16px;
     line-height: 18px;
+
+    &__disabled {
+      background-color: rgb(222, 222, 222);
+    }
   }
 
   &__input-container {
@@ -59,4 +63,9 @@
   &--error {
     border-color: $red;
   }
+
+  &__disabled {
+    background-color: #F2F3F4;
+  }
+
 }

ui/app/components/ui/unit-input/unit-input.component.js

@@ -13,6 +13,7 @@ export default class UnitInput extends PureComponent {
     children: PropTypes.node,
     actionComponent: PropTypes.node,
     error: PropTypes.bool,
+    maxModeOn: PropTypes.bool,
     onBlur: PropTypes.func,
     onChange: PropTypes.func,
     placeholder: PropTypes.string,
@@ -71,25 +72,26 @@ export default class UnitInput extends PureComponent {
   }
 
   render () {
-    const { error, placeholder, suffix, actionComponent, children } = this.props
+    const { error, placeholder, suffix, actionComponent, children, maxModeOn } = this.props
     const { value } = this.state
 
     return (
       <div
-        className={classnames('unit-input', { 'unit-input--error': error })}
-        onClick={this.handleFocus}
+        className={classnames('unit-input', { 'unit-input--error': error }, { 'unit-input__disabled': maxModeOn })}
+        onClick={maxModeOn ? null : this.handleFocus}
       >
         <div className="unit-input__inputs">
           <div className="unit-input__input-container">
             <input
               type="number"
-              className="unit-input__input"
+              className={classnames('unit-input__input', { 'unit-input__disabled': maxModeOn })}
               value={value}
               placeholder={placeholder}
               onChange={this.handleChange}
               onBlur={this.handleBlur}
               style={{ width: this.getInputWidth(value) }}
               ref={ref => { this.unitInput = ref }}
+              disabled={maxModeOn}
             />
             {
               suffix && (

ui/app/css/itcss/components/send.scss

@@ -520,6 +520,10 @@
     color: $red;
   }
 
+  &__error-amount {
+    margin-top: 5px;
+  }
+
   &__warning {
     font-size: 12px;
     line-height: 12px;
@@ -557,6 +561,12 @@
     justify-content: space-between;
   }
 
+  &__form-field-container {
+    display: flex;
+    flex-direction: column;
+    width: 277px;
+  }
+
   &__form-field {
     flex: 1 1 auto;
     min-width: 0;
@@ -817,12 +827,47 @@
   }
 
   &__amount-max {
-    color: $curious-blue;
     font-family: Roboto;
     font-size: 12px;
-    left: 8px;
-    border: none;
+    position: relative;
+    display: inline-block;
+    width: 56px;
+    height: 20px;
+    margin-top: 5px;
+
+    &__button {
+      width: 56px;
+      height: 20px;
+      position: absolute;
+      border: 2px solid #B0D7F2;
+      border-radius: 6px;
       cursor: pointer;
+      top: 0;
+      left: 0;
+      right: 0;
+      bottom: 0;
+      display: flex;
+      align-items: center;
+      justify-content: center;
+      color: #2f9ae0;
+
+      &__disabled {
+        color: #B0D7F2;
+        cursor: auto;
+      }
+    }
+
+    input:checked + &__button {
+      background-color: #037DD6;
+      border: 2px solid #037DD6;
+      color: #fff;
+    }
+  }
+
+  &__amount-max input {
+    opacity: 0;
+    width: 0;
+    height: 0;
   }
 
   &__gas-fee-display {
@@ -1077,7 +1122,7 @@
   font-size: 14px;
   color: #2f9ae0;
   cursor: pointer;
-  margin-top: 16px;
+  margin-top: 5px;
 }
 
 .sliders-icon-container {

ui/app/helpers/utils/conversions.util.js

@@ -1,6 +1,6 @@
 import ethUtil from 'ethereumjs-util'
 import { ETH, GWEI, WEI } from '../constants/common'
-import { conversionUtil, addCurrencies } from './conversion-util'
+import { conversionUtil, addCurrencies, subtractCurrencies } from './conversion-util'
 
 export function bnToHex (inputBn) {
   return ethUtil.addHexPrefix(inputBn.toString(16))
@@ -92,6 +92,15 @@ export function addHexWEIsToDec (aHexWEI, bHexWEI) {
   })
 }
 
+export function subtractHexWEIsToDec (aHexWEI, bHexWEI) {
+  return subtractCurrencies(aHexWEI, bHexWEI, {
+    aBase: 16,
+    bBase: 16,
+    fromDenomination: 'WEI',
+    numberOfDecimals: 6,
+  })
+}
+
 export function decEthToConvertedCurrency (ethTotal, convertedCurrency, conversionRate) {
   return conversionUtil(ethTotal, {
     fromNumericBase: 'dec',

ui/app/pages/send/send-content/send-amount-row/amount-max-button/amount-max-button.component.js

@@ -1,16 +1,21 @@
 import React, { Component } from 'react'
 import PropTypes from 'prop-types'
+import classnames from 'classnames'
 
 export default class AmountMaxButton extends Component {
 
   static propTypes = {
     balance: PropTypes.string,
+    buttonDataLoading: PropTypes.bool,
+    clearMaxAmount: PropTypes.func,
+    inError: PropTypes.bool,
     gasTotal: PropTypes.string,
     maxModeOn: PropTypes.bool,
     selectedToken: PropTypes.object,
     setAmountToMax: PropTypes.func,
     setMaxModeTo: PropTypes.func,
     tokenBalance: PropTypes.string,
+
   }
 
   static contextTypes = {
@@ -36,7 +41,7 @@ export default class AmountMaxButton extends Component {
   }
 
   onMaxClick = (event) => {
-    const { setMaxModeTo } = this.props
+    const { setMaxModeTo, clearMaxAmount, maxModeOn } = this.props
     const { metricsEvent } = this.context
 
     metricsEvent({
@@ -46,25 +51,25 @@ export default class AmountMaxButton extends Component {
         name: 'Clicked "Amount Max"',
       },
     })
-
-    event.preventDefault()
+    if (!maxModeOn) {
       setMaxModeTo(true)
       this.setMaxAmount()
+    } else {
+      setMaxModeTo(false)
+      clearMaxAmount()
+    }
   }
 
   render () {
-    return this.props.maxModeOn
-      ? null
-      : (
-        <div>
-          <span
-            className="send-v2__amount-max"
-            onClick={this.onMaxClick}
-          >
+    const { maxModeOn, buttonDataLoading, inError } = this.props
+
+    return (
+          <div className={'send-v2__amount-max'} onClick={buttonDataLoading || inError ? null : this.onMaxClick}>
+            <input type="checkbox" checked={maxModeOn} />
+            <div className={classnames('send-v2__amount-max__button', { 'send-v2__amount-max__button__disabled': buttonDataLoading || inError })}>
                 {this.context.t('max')}
-          </span>
+            </div>
           </div>
       )
   }
-
 }

ui/app/pages/send/send-content/send-amount-row/amount-max-button/amount-max-button.container.js

@@ -5,6 +5,7 @@ import {
   getSendFromBalance,
   getTokenBalance,
 } from '../../../send.selectors.js'
+import { getBasicGasEstimateLoadingStatus } from '../../../../../selectors/custom-gas'
 import { getMaxModeOn } from './amount-max-button.selectors.js'
 import { calcMaxAmount } from './amount-max-button.utils.js'
 import {
@@ -22,6 +23,7 @@ function mapStateToProps (state) {
 
   return {
     balance: getSendFromBalance(state),
+    buttonDataLoading: getBasicGasEstimateLoadingStatus(state),
     gasTotal: getGasTotal(state),
     maxModeOn: getMaxModeOn(state),
     selectedToken: getSelectedToken(state),
@@ -35,6 +37,9 @@ function mapDispatchToProps (dispatch) {
       dispatch(updateSendErrors({ amount: null }))
       dispatch(updateSendAmount(calcMaxAmount(maxAmountDataObject)))
     },
+    clearMaxAmount: () => {
+      dispatch(updateSendAmount('0'))
+    },
     setMaxModeTo: bool => dispatch(setMaxModeTo(bool)),
   }
 }

ui/app/pages/send/send-content/send-amount-row/amount-max-button/tests/amount-max-button-component.test.js

@@ -65,7 +65,7 @@ describe('AmountMaxButton Component', function () {
       assert(wrapper.exists('.send-v2__amount-max'))
     })
 
-    it('should call setMaxModeTo and setMaxAmount when the send-v2__amount-max div is clicked', () => {
+    it('should call setMaxModeTo and setMaxAmount when the checkbox is checked', () => {
       const {
         onClick,
       } = wrapper.find('.send-v2__amount-max').props()
@@ -81,11 +81,6 @@ describe('AmountMaxButton Component', function () {
       )
     })
 
-    it('should not render anything when maxModeOn is true', () => {
-      wrapper.setProps({ maxModeOn: true })
-      assert.ok(!wrapper.exists('.send-v2__amount-max'))
-    })
-
     it('should render the expected text when maxModeOn is false', () => {
       wrapper.setProps({ maxModeOn: false })
       assert.equal(wrapper.find('.send-v2__amount-max').text(), 'max_t')

ui/app/pages/send/send-content/send-amount-row/amount-max-button/tests/amount-max-button-container.test.js

@@ -29,6 +29,7 @@ proxyquire('../amount-max-button.container.js', {
   },
   './amount-max-button.selectors.js': { getMaxModeOn: (s) => `mockMaxModeOn:${s}` },
   './amount-max-button.utils.js': { calcMaxAmount: (mockObj) => mockObj.val + 1 },
+  '../../../../../selectors/custom-gas': { getBasicGasEstimateLoadingStatus: (s) => `mockButtonDataLoading:${s}`},
   '../../../../../store/actions': actionSpies,
   '../../../../../ducks/send/send.duck': duckActionSpies,
 })
@@ -40,6 +41,7 @@ describe('amount-max-button container', () => {
     it('should map the correct properties to props', () => {
       assert.deepEqual(mapStateToProps('mockState'), {
         balance: 'mockBalance:mockState',
+        buttonDataLoading: 'mockButtonDataLoading:mockState',
         gasTotal: 'mockGasTotal:mockState',
         maxModeOn: 'mockMaxModeOn:mockState',
         selectedToken: 'mockSelectedToken:mockState',

ui/app/pages/send/send-content/send-amount-row/send-amount-row.component.js

@@ -110,7 +110,7 @@ export default class SendAmountRow extends Component {
         showError={inError}
         errorType={'amount'}
       >
-        {!inError && gasTotal && <AmountMaxButton />}
+        {gasTotal && <AmountMaxButton inError={inError} />}
         { this.renderInput() }
       </SendRowWrapper>
     )

ui/app/pages/send/send-content/send-gas-row/send-gas-row.component.js

@@ -8,14 +8,19 @@ import AdvancedGasInputs from '../../../../components/app/gas-customization/adva
 export default class SendGasRow extends Component {
 
   static propTypes = {
+    balance: PropTypes.string,
     conversionRate: PropTypes.number,
     convertedCurrency: PropTypes.string,
     gasFeeError: PropTypes.bool,
     gasLoadingError: PropTypes.bool,
     gasTotal: PropTypes.string,
+    maxModeOn: PropTypes.bool,
     showCustomizeGasModal: PropTypes.func,
+    selectedToken: PropTypes.object,
+    setAmountToMax: PropTypes.func,
     setGasPrice: PropTypes.func,
     setGasLimit: PropTypes.func,
+    tokenBalance: PropTypes.string,
     gasPriceButtonGroupProps: PropTypes.object,
     gasButtonGroupShown: PropTypes.bool,
     advancedInlineGasShown: PropTypes.bool,
@@ -47,6 +52,23 @@ export default class SendGasRow extends Component {
     </div>
   }
 
+  setMaxAmount () {
+    const {
+      balance,
+      gasTotal,
+      selectedToken,
+      setAmountToMax,
+      tokenBalance,
+    } = this.props
+
+    setAmountToMax({
+      balance,
+      gasTotal,
+      selectedToken,
+      tokenBalance,
+    })
+  }
+
   renderContent () {
     const {
       conversionRate,
@@ -57,6 +79,7 @@ export default class SendGasRow extends Component {
       gasPriceButtonGroupProps,
       gasButtonGroupShown,
       advancedInlineGasShown,
+      maxModeOn,
       resetGasButtons,
       setGasPrice,
       setGasLimit,
@@ -71,7 +94,7 @@ export default class SendGasRow extends Component {
           className="gas-price-button-group--small"
           showCheck={false}
           {...gasPriceButtonGroupProps}
-          handleGasPriceSelection={(...args) => {
+          handleGasPriceSelection={async (...args) => {
             metricsEvent({
               eventOpts: {
                 category: 'Transactions',
@@ -79,7 +102,10 @@ export default class SendGasRow extends Component {
                 name: 'Changed Gas Button',
               },
             })
-            gasPriceButtonGroupProps.handleGasPriceSelection(...args)
+            await gasPriceButtonGroupProps.handleGasPriceSelection(...args)
+            if (maxModeOn) {
+              this.setMaxAmount()
+            }
           }}
         />
         { this.renderAdvancedOptionsButton() }
@@ -89,7 +115,12 @@ export default class SendGasRow extends Component {
       convertedCurrency={convertedCurrency}
       gasLoadingError={gasLoadingError}
       gasTotal={gasTotal}
-      onReset={resetGasButtons}
+      onReset={() => {
+        resetGasButtons()
+        if (maxModeOn) {
+          this.setMaxAmount()
+        }
+      }}
       onClick={() => showCustomizeGasModal()}
     />
     const advancedGasInputs = <div>

ui/app/pages/send/send-content/send-gas-row/send-gas-row.container.js

@@ -6,11 +6,17 @@ import {
   getGasPrice,
   getGasLimit,
   getSendAmount,
+  getSendFromBalance,
+  getTokenBalance,
 } from '../../send.selectors.js'
+import {
+  getMaxModeOn,
+} from '../send-amount-row/amount-max-button/amount-max-button.selectors'
 import {
   isBalanceSufficient,
   calcGasTotal,
 } from '../../send.utils.js'
+import { calcMaxAmount } from '../send-amount-row/amount-max-button/amount-max-button.utils'
 import {
   getBasicGasEstimateLoadingStatus,
   getRenderableEstimateDataForSmallButtonsFromGWEI,
@@ -18,6 +24,7 @@ import {
 } from '../../../../selectors/custom-gas'
 import {
   showGasButtonGroup,
+  updateSendErrors,
 } from '../../../../ducks/send/send.duck'
 import {
   resetCustomData,
@@ -25,10 +32,11 @@ import {
   setCustomGasLimit,
 } from '../../../../ducks/gas/gas.duck'
 import { getGasLoadingError, gasFeeIsInError, getGasButtonGroupShown } from './send-gas-row.selectors.js'
-import { showModal, setGasPrice, setGasLimit, setGasTotal } from '../../../../store/actions'
+import { showModal, setGasPrice, setGasLimit, setGasTotal, updateSendAmount } from '../../../../store/actions'
 import { getAdvancedInlineGasShown, getCurrentEthBalance, getSelectedToken } from '../../../../selectors/selectors'
 import SendGasRow from './send-gas-row.component'
 
+
 export default connect(mapStateToProps, mapDispatchToProps, mergeProps)(SendGasRow)
 
 function mapStateToProps (state) {
@@ -49,6 +57,7 @@ function mapStateToProps (state) {
   })
 
   return {
+    balance: getSendFromBalance(state),
     conversionRate,
     convertedCurrency: getCurrentCurrency(state),
     gasTotal,
@@ -65,6 +74,9 @@ function mapStateToProps (state) {
     gasPrice,
     gasLimit,
     insufficientBalance,
+    maxModeOn: getMaxModeOn(state),
+    selectedToken: getSelectedToken(state),
+    tokenBalance: getTokenBalance(state),
   }
 }
 
@@ -85,6 +97,10 @@ function mapDispatchToProps (dispatch) {
         dispatch(setGasTotal(calcGasTotal(newLimit, gasPrice)))
       }
     },
+    setAmountToMax: maxAmountDataObject => {
+      dispatch(updateSendErrors({ amount: null }))
+      dispatch(updateSendAmount(calcMaxAmount(maxAmountDataObject)))
+    },
     showGasButtonGroup: () => dispatch(showGasButtonGroup()),
     resetCustomData: () => dispatch(resetCustomData()),
   }

ui/app/pages/send/send-content/send-gas-row/tests/send-gas-row-container.test.js

@@ -44,6 +44,11 @@ proxyquire('../send-gas-row.container.js', {
     getGasPrice: (s) => `mockGasPrice:${s}`,
     getGasLimit: (s) => `mockGasLimit:${s}`,
     getSendAmount: (s) => `mockSendAmount:${s}`,
+    getSendFromBalance: (s) => `mockBalance:${s}`,
+    getTokenBalance: (s) => `mockTokenBalance:${s}`,
+  },
+  '../send-amount-row/amount-max-button/amount-max-button.selectors': {
+    getMaxModeOn: (s) => `mockMaxModeOn:${s}`,
   },
   '../../send.utils.js': {
     isBalanceSufficient: ({
@@ -75,6 +80,7 @@ describe('send-gas-row container', () => {
 
     it('should map the correct properties to props', () => {
       assert.deepEqual(mapStateToProps('mockState'), {
+        balance: 'mockBalance:mockState',
         conversionRate: 'mockConversionRate:mockState',
         convertedCurrency: 'mockConvertedCurrency:mockState',
         gasTotal: 'mockGasTotal:mockState',
@@ -91,6 +97,9 @@ describe('send-gas-row container', () => {
         gasLimit: 'mockGasLimit:mockState',
         gasPrice: 'mockGasPrice:mockState',
         insufficientBalance: false,
+        maxModeOn: 'mockMaxModeOn:mockState',
+        selectedToken: false,
+        tokenBalance: 'mockTokenBalance:mockState',
       })
     })
 

ui/app/pages/send/send-content/send-row-wrapper/send-row-error-message/send-row-error-message.component.js

@@ -1,5 +1,6 @@
 import React, { Component } from 'react'
 import PropTypes from 'prop-types'
+import classnames from 'classnames'
 
 export default class SendRowErrorMessage extends Component {
 
@@ -19,7 +20,7 @@ export default class SendRowErrorMessage extends Component {
 
     return (
       errorMessage
-        ? <div className="send-v2__error">{this.context.t(errorMessage)}</div>
+        ? <div className={classnames('send-v2__error', {'send-v2__error-amount': errorType === 'amount'})}>{this.context.t(errorMessage)}</div>
         : null
     )
   }

ui/app/pages/send/send-content/send-row-wrapper/send-row-wrapper.component.js

@@ -18,7 +18,7 @@ export default class SendRowWrapper extends Component {
     t: PropTypes.func,
   };
 
-  render () {
+  renderAmountFormRow () {
     const {
       children,
       errorType = '',
@@ -30,6 +30,38 @@ export default class SendRowWrapper extends Component {
     const formField = Array.isArray(children) ? children[1] || children[0] : children
     const customLabelContent = children.length > 1 ? children[0] : null
 
+    return (
+      <div className="send-v2__form-row">
+        <div className="send-v2__form-label">
+          {label}
+          {customLabelContent}
+        </div>
+        <div className="send-v2__form-field-container">
+          <div className="send-v2__form-field">
+            {formField}
+          </div>
+          <div>
+            {showError && <SendRowErrorMessage errorType={errorType} />}
+            {!showError && showWarning && <SendRowWarningMessage warningType={warningType} />}
+          </div>
+        </div>
+      </div>
+    )
+  }
+
+  renderFormRow () {
+    const {
+      children,
+      errorType = '',
+      label,
+      showError = false,
+      showWarning = false,
+      warningType = '',
+    } = this.props
+
+    const formField = Array.isArray(children) ? children[1] || children[0] : children
+    const customLabelContent = (Array.isArray(children) && children.length) > 1 ? children[0] : null
+
     return (
       <div className="send-v2__form-row">
         <div className="send-v2__form-label">
@@ -45,4 +77,14 @@ export default class SendRowWrapper extends Component {
     )
   }
 
+  render () {
+    const {
+      errorType = '',
+    } = this.props
+
+    return (
+      errorType === 'amount' ? this.renderAmountFormRow() : this.renderFormRow()
+    )
+  }
+
 }