Connect the gas-button-group component to redux and a live api.

ui/app/components/button-group/button-group.component.js

@@ -5,6 +5,7 @@ import classnames from 'classnames'
 export default class ButtonGroup extends PureComponent {
   static propTypes = {
     defaultActiveButtonIndex: PropTypes.number,
+    noButtonActiveByDefault: PropTypes.bool,
     disabled: PropTypes.bool,
     children: PropTypes.array,
     className: PropTypes.string,
@@ -16,7 +17,9 @@ export default class ButtonGroup extends PureComponent {
   }
 
   state = {
-    activeButtonIndex: this.props.defaultActiveButtonIndex || 0,
+    activeButtonIndex: this.props.noButtonActiveByDefault
+      ? null
+      : this.props.defaultActiveButtonIndex || 0,
   }
 
   handleButtonClick (activeButtonIndex) {

ui/app/components/gas-customization/gas-modal-page-container/basic-tab-content/basic-tab-content.component.js

@@ -15,7 +15,13 @@ export default class BasicTabContent extends Component {
     return (
       <div className="basic-tab-content">
         <div className="basic-tab-content__title">Suggest gas fee increases</div>
-        <GasPriceButtonGroup {...this.props.gasPriceButtonGroupProps} />
+        <GasPriceButtonGroup
+          {...this.props.gasPriceButtonGroupProps}
+          className="gas-price-button-group"
+          noButtonActiveByDefault={true}
+          showCheck={true}
+          handleGasPriceSelection={(newPrice) => console.log('New Price:', newPrice)}
+        />
       </div>
     )
   }

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

@@ -23,7 +23,9 @@ export default class GasModalPageContainer extends Component {
 
   renderBasicTabContent () {
     return (
-      <BasicTabContent gasPriceButtonGroupProps={this.props.gasPriceButtonGroupProps} />
+      <BasicTabContent
+        gasPriceButtonGroupProps={this.props.gasPriceButtonGroupProps}
+      />
     )
   }
 

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

@@ -4,45 +4,23 @@ import { hideModal } from '../../../actions'
 import {
   setCustomGasPrice,
   setCustomGasLimit,
-} from '../../../ducks/custom-gas'
+} from '../../../ducks/gas.duck'
 import {
   getCustomGasPrice,
   getCustomGasLimit,
+  getRenderableBasicEstimateData,
+  getBasicGasEstimateLoadingStatus,
 } from '../../../selectors/custom-gas'
 
-const mockGasPriceButtonGroupProps = {
-  buttonDataLoading: false,
-  className: 'gas-price-button-group',
-  gasButtonInfo: [
-    {
-      feeInPrimaryCurrency: '$0.52',
-      feeInSecondaryCurrency: '0.0048 ETH',
-      timeEstimate: '~ 1 min 0 sec',
-      priceInHexWei: '0xa1b2c3f',
-    },
-    {
-      feeInPrimaryCurrency: '$0.39',
-      feeInSecondaryCurrency: '0.004 ETH',
-      timeEstimate: '~ 1 min 30 sec',
-      priceInHexWei: '0xa1b2c39',
-    },
-    {
-      feeInPrimaryCurrency: '$0.30',
-      feeInSecondaryCurrency: '0.00354 ETH',
-      timeEstimate: '~ 2 min 1 sec',
-      priceInHexWei: '0xa1b2c30',
-    },
-  ],
-  handleGasPriceSelection: newPrice => console.log('NewPrice: ', newPrice),
-  noButtonActiveByDefault: true,
-  showCheck: true,
-}
-
 const mapStateToProps = state => {
+  const buttonDataLoading = getBasicGasEstimateLoadingStatus(state)
   return {
     customGasPrice: getCustomGasPrice(state),
     customGasLimit: getCustomGasLimit(state),
-    gasPriceButtonGroupProps: mockGasPriceButtonGroupProps,
+    gasPriceButtonGroupProps: {
+      buttonDataLoading,
+      gasButtonInfo: getRenderableBasicEstimateData(state),
+    },
   }
 }
 
@@ -51,6 +29,7 @@ const mapDispatchToProps = dispatch => {
     hideModal: () => dispatch(hideModal()),
     updateCustomGasPrice: (newPrice) => dispatch(setCustomGasPrice(newPrice)),
     updateCustomGasLimit: (newLimit) => dispatch(setCustomGasLimit(newLimit)),
+    handleGasPriceSelection: newPrice => console.log('NewPrice: ', newPrice),
   }
 }
 

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

@@ -25,9 +25,11 @@ proxyquire('../gas-modal-page-container.container.js', {
   '../../../selectors/custom-gas': {
     getCustomGasPrice: (s) => `mockGasPrice:${s}`,
     getCustomGasLimit: (s) => `mockGasLimit:${s}`,
+    getBasicGasEstimateLoadingStatus: (s) => `mockBasicGasEstimateLoadingStatus:${s}`,
+    getRenderableBasicEstimateData: (s) => `mockRenderableBasicEstimateData:${s}`,
   },
   '../../../actions': actionSpies,
-  '../../../ducks/custom-gas': customGasActionSpies,
+  '../../../ducks/gas.duck': customGasActionSpies,
 })
 
 describe('gas-modal-page-container container', () => {
@@ -37,6 +39,8 @@ describe('gas-modal-page-container container', () => {
     it('should map the correct properties to props', () => {
       assert.equal(mapStateToProps('mockState').customGasPrice, 'mockGasPrice:mockState')
       assert.equal(mapStateToProps('mockState').customGasLimit, 'mockGasLimit:mockState')
+      assert.equal(mapStateToProps('mockState').gasPriceButtonGroupProps.buttonDataLoading, 'mockBasicGasEstimateLoadingStatus:mockState')
+      assert.equal(mapStateToProps('mockState').gasPriceButtonGroupProps.gasButtonInfo, 'mockRenderableBasicEstimateData:mockState')
     })
 
   })

ui/app/components/gas-customization/gas.selectors.js

@@ -0,0 +1,14 @@
+const selectors = {
+  getCurrentBlockTime,
+  getBasicGasEstimateLoadingStatus,
+}
+
+module.exports = selectors
+
+function getCurrentBlockTime (state) {
+  return state.gas.currentBlockTime
+}
+
+function getBasicGasEstimateLoadingStatus (state) {
+  return state.gas.basicEstimateIsLoading
+}

ui/app/components/send/send.component.js

@@ -162,6 +162,10 @@ export default class SendTransactionScreen extends PersistentForm {
     }
   }
 
+  componentDidMount () {
+    this.props.fetchGasEstimates()
+  }
+
   componentWillMount () {
     const {
       from: { address },

ui/app/components/send/send.container.js

@@ -36,6 +36,9 @@ import {
   resetSendState,
   updateSendErrors,
 } from '../../ducks/send.duck'
+import {
+  fetchGasEstimates,
+} from '../../ducks/gas.duck'
 import {
   calcGasTotal,
 } from './send.utils.js'
@@ -104,5 +107,6 @@ function mapDispatchToProps (dispatch) {
     scanQrCode: () => dispatch(showQrScanner(SEND_ROUTE)),
     qrCodeDetected: (data) => dispatch(qrCodeDetected(data)),
     updateSendTo: (to, nickname) => dispatch(updateSendTo(to, nickname)),
+    fetchGasEstimates: () => dispatch(fetchGasEstimates()),
   }
 }

ui/app/components/send/tests/send-component.test.js

@@ -13,6 +13,7 @@ const propsMethodSpies = {
   updateSendErrors: sinon.spy(),
   updateSendTokenBalance: sinon.spy(),
   resetSendState: sinon.spy(),
+  fetchGasEstimates: sinon.spy(),
 }
 const utilsMethodStubs = {
   getAmountErrorObject: sinon.stub().returns({ amount: 'mockAmountError' }),
@@ -37,6 +38,7 @@ describe('Send Component', function () {
       blockGasLimit={'mockBlockGasLimit'}
       conversionRate={10}
       editingTransactionId={'mockEditingTransactionId'}
+      fetchGasEstimates={propsMethodSpies.fetchGasEstimates}
       from={ { address: 'mockAddress', balance: 'mockBalance' } }
       gasLimit={'mockGasLimit'}
       gasPrice={'mockGasPrice'}
@@ -63,6 +65,7 @@ describe('Send Component', function () {
     utilsMethodStubs.doesAmountErrorRequireUpdate.resetHistory()
     utilsMethodStubs.getAmountErrorObject.resetHistory()
     utilsMethodStubs.getGasFeeErrorObject.resetHistory()
+    propsMethodSpies.fetchGasEstimates.resetHistory()
     propsMethodSpies.updateAndSetGasTotal.resetHistory()
     propsMethodSpies.updateSendErrors.resetHistory()
     propsMethodSpies.updateSendTokenBalance.resetHistory()
@@ -82,6 +85,15 @@ describe('Send Component', function () {
     })
   })
 
+  describe('componentDidMount', () => {
+    it('should call props.fetchGasEstimates', () => {
+      propsMethodSpies.fetchGasEstimates.resetHistory()
+      assert.equal(propsMethodSpies.fetchGasEstimates.callCount, 0)
+      wrapper.instance().componentDidMount()
+      assert.equal(propsMethodSpies.fetchGasEstimates.callCount, 1)
+    })
+  })
+
   describe('componentWillUnmount', () => {
     it('should call this.props.resetSendState', () => {
       propsMethodSpies.resetSendState.resetHistory()

ui/app/ducks/custom-gas.js

@@ -1,67 +0,0 @@
-import extend from 'xtend'
-
-// Actions
-const SET_CUSTOM_GAS_PRICE = 'metamask/custom-gas/SET_CUSTOM_GAS_PRICE'
-const SET_CUSTOM_GAS_LIMIT = 'metamask/custom-gas/SET_CUSTOM_GAS_LIMIT'
-const SET_CUSTOM_GAS_ERRORS = 'metamask/custom-gas/SET_CUSTOM_GAS_ERRORS'
-const RESET_CUSTOM_GAS_STATE = 'metamask/custom-gas/RESET_CUSTOM_GAS_STATE'
-
-// TODO: determine if this approach to initState is consistent with conventional ducks pattern
-const initState = {
-  price: 0,
-  limit: 21000,
-  errors: {},
-}
-
-// Reducer
-export default function reducer ({ customGas: customGasState = initState }, action = {}) {
-  const newState = extend({}, customGasState)
-
-  switch (action.type) {
-    case SET_CUSTOM_GAS_PRICE:
-      return extend(newState, {
-        price: action.value,
-      })
-    case SET_CUSTOM_GAS_LIMIT:
-      return extend(newState, {
-        limit: action.value,
-      })
-    case SET_CUSTOM_GAS_ERRORS:
-      return extend(newState, {
-        errors: {
-          ...newState.errors,
-          ...action.value,
-        },
-      })
-    case RESET_CUSTOM_GAS_STATE:
-      return extend({}, initState)
-    default:
-      return newState
-  }
-}
-
-// Action Creators
-export function setCustomGasPrice (newPrice) {
-  return {
-    type: SET_CUSTOM_GAS_PRICE,
-    value: newPrice,
-  }
-}
-
-export function setCustomGasLimit (newLimit) {
-  return {
-    type: SET_CUSTOM_GAS_LIMIT,
-    value: newLimit,
-  }
-}
-
-export function setCustomGasErrors (newErrors) {
-  return {
-    type: SET_CUSTOM_GAS_ERRORS,
-    value: newErrors,
-  }
-}
-
-export function resetCustomGasState () {
-  return { type: RESET_CUSTOM_GAS_STATE }
-}

ui/app/ducks/gas.duck.js

@@ -0,0 +1,189 @@
+import { clone } from 'ramda'
+
+// Actions
+const BASIC_GAS_ESTIMATE_LOADING_FINISHED = 'metamask/gas/BASIC_GAS_ESTIMATE_LOADING_FINISHED'
+const BASIC_GAS_ESTIMATE_LOADING_STARTED = 'metamask/gas/BASIC_GAS_ESTIMATE_LOADING_STARTED'
+const RESET_CUSTOM_GAS_STATE = 'metamask/gas/RESET_CUSTOM_GAS_STATE'
+const SET_BASIC_GAS_ESTIMATE_DATA = 'metamask/gas/SET_BASIC_GAS_ESTIMATE_DATA'
+const SET_CUSTOM_GAS_ERRORS = 'metamask/gas/SET_CUSTOM_GAS_ERRORS'
+const SET_CUSTOM_GAS_LIMIT = 'metamask/gas/SET_CUSTOM_GAS_LIMIT'
+const SET_CUSTOM_GAS_PRICE = 'metamask/gas/SET_CUSTOM_GAS_PRICE'
+const SET_CUSTOM_GAS_TOTAL = 'metamask/gas/SET_CUSTOM_GAS_TOTAL'
+
+// TODO: determine if this approach to initState is consistent with conventional ducks pattern
+const initState = {
+  customData: {
+    price: 0,
+    limit: 21000,
+  },
+  basicEstimates: {
+    average: null,
+    fastestWait: null,
+    fastWait: null,
+    fast: null,
+    safeLowWait: null,
+    blockNum: null,
+    avgWait: null,
+    blockTime: null,
+    speed: null,
+    fastest: null,
+    safeLow: null,
+  },
+  basicEstimateIsLoading: true,
+  errors: {},
+}
+
+// Reducer
+export default function reducer ({ gas: gasState = initState }, action = {}) {
+  const newState = clone(gasState)
+
+  switch (action.type) {
+    case BASIC_GAS_ESTIMATE_LOADING_STARTED:
+      return {
+        ...newState,
+        basicEstimateIsLoading: true,
+      }
+    case BASIC_GAS_ESTIMATE_LOADING_FINISHED:
+      return {
+        ...newState,
+        basicEstimateIsLoading: false,
+      }
+    case SET_BASIC_GAS_ESTIMATE_DATA:
+      return {
+        ...newState,
+        basicEstimates: action.value,
+      }
+    case SET_CUSTOM_GAS_PRICE:
+      return {
+        ...newState,
+        customData: {
+          ...newState.customData,
+          price: action.value,
+        },
+      }
+    case SET_CUSTOM_GAS_LIMIT:
+      return {
+        ...newState,
+        customData: {
+          ...newState.customData,
+          limit: action.value,
+        },
+      }
+    case SET_CUSTOM_GAS_TOTAL:
+      return {
+        ...newState,
+        customData: {
+          ...newState.customData,
+          total: action.value,
+        },
+      }
+    case SET_CUSTOM_GAS_ERRORS:
+      return {
+        ...newState,
+        errors: {
+          ...newState.errors,
+          ...action.value,
+        },
+      }
+    case RESET_CUSTOM_GAS_STATE:
+      return clone(initState)
+    default:
+      return newState
+  }
+}
+
+// Action Creators
+export function basicGasEstimatesLoadingStarted () {
+  return {
+    type: BASIC_GAS_ESTIMATE_LOADING_STARTED,
+  }
+}
+
+export function basicGasEstimatesLoadingFinished () {
+  return {
+    type: BASIC_GAS_ESTIMATE_LOADING_FINISHED,
+  }
+}
+
+export function fetchGasEstimates () {
+  return (dispatch) => {
+    dispatch(basicGasEstimatesLoadingStarted())
+
+    return fetch('https://ethgasstation.info/json/ethgasAPI.json', {
+      'headers': {},
+      'referrer': 'http://ethgasstation.info/json/',
+      'referrerPolicy': 'no-referrer-when-downgrade',
+      'body': null,
+      'method': 'GET',
+      'mode': 'cors'}
+    )
+      .then(r => r.json())
+      .then(({
+        average,
+        avgWait,
+        block_time: blockTime,
+        blockNum,
+        fast,
+        fastest,
+        fastestWait,
+        fastWait,
+        safeLow,
+        safeLowWait,
+        speed,
+      }) => {
+        dispatch(setBasicGasEstimateData({
+          average,
+          avgWait,
+          blockTime,
+          blockNum,
+          fast,
+          fastest,
+          fastestWait,
+          fastWait,
+          safeLow,
+          safeLowWait,
+          speed,
+        }))
+        dispatch(basicGasEstimatesLoadingFinished())
+      })
+  }
+}
+
+export function setBasicGasEstimateData (basicGasEstimateData) {
+  return {
+    type: SET_BASIC_GAS_ESTIMATE_DATA,
+    value: basicGasEstimateData,
+  }
+}
+
+export function setCustomGasPrice (newPrice) {
+  return {
+    type: SET_CUSTOM_GAS_PRICE,
+    value: newPrice,
+  }
+}
+
+export function setCustomGasLimit (newLimit) {
+  return {
+    type: SET_CUSTOM_GAS_LIMIT,
+    value: newLimit,
+  }
+}
+
+export function setCustomGasTotal (newTotal) {
+  return {
+    type: SET_CUSTOM_GAS_TOTAL,
+    value: newTotal,
+  }
+}
+
+export function setCustomGasErrors (newErrors) {
+  return {
+    type: SET_CUSTOM_GAS_ERRORS,
+    value: newErrors,
+  }
+}
+
+export function resetCustomGasState () {
+  return { type: RESET_CUSTOM_GAS_STATE }
+}

ui/app/helpers/confirm-transaction/util.js

@@ -95,7 +95,7 @@ export function formatCurrency (value, currencyCode) {
   const upperCaseCurrencyCode = currencyCode.toUpperCase()
 
   return currencies.find(currency => currency.code === upperCaseCurrencyCode)
-    ? currencyFormatter.format(Number(value), { code: upperCaseCurrencyCode })
+    ? currencyFormatter.format(Number(value), { code: upperCaseCurrencyCode, style: 'currency' })
     : value
 }
 

ui/app/reducers.js

@@ -10,7 +10,7 @@ const reduceApp = require('./reducers/app')
 const reduceLocale = require('./reducers/locale')
 const reduceSend = require('./ducks/send.duck').default
 import reduceConfirmTransaction from './ducks/confirm-transaction.duck'
-import reduceCustomGas from './ducks/custom-gas'
+import reduceGas from './ducks/gas.duck'
 
 window.METAMASK_CACHED_LOG_STATE = null
 
@@ -50,7 +50,7 @@ function rootReducer (state, action) {
 
   state.confirmTransaction = reduceConfirmTransaction(state, action)
 
-  state.customGas = reduceCustomGas(state, action)
+  state.gas = reduceGas(state, action)
 
   window.METAMASK_CACHED_LOG_STATE = state
   return state

ui/app/selectors/custom-gas.js

@@ -1,19 +1,191 @@
+import { pipe, partialRight } from 'ramda'
+import {
+  getConversionRate,
+  getGasLimit,
+} from '../components/send/send.selectors'
+import {
+  conversionUtil,
+  multiplyCurrencies,
+} from '../conversion-util'
+import {
+  getCurrentCurrency,
+} from '../selectors'
+import {
+  formatCurrency,
+} from '../helpers/confirm-transaction/util'
+import {
+  calcGasTotal,
+} from '../components/send/send.utils'
+import { addHexPrefix } from 'ethereumjs-util'
+
 const selectors = {
-  getCustomGasPrice,
-  getCustomGasLimit,
   getCustomGasErrors,
+  getCustomGasLimit,
+  getCustomGasPrice,
+  getCustomGasTotal,
+  getRenderableBasicEstimateData,
+  getBasicGasEstimateLoadingStatus,
 }
 
 module.exports = selectors
 
-function getCustomGasPrice (state) {
-  return state.customGas.price
+function getCustomGasErrors (state) {
+  return state.gas.errors
 }
 
 function getCustomGasLimit (state) {
-  return state.customGas.limit
+  return state.gas.customData.limit
 }
 
-function getCustomGasErrors (state) {
-  return state.customGas.errors
+function getCustomGasPrice (state) {
+  return state.gas.customData.price
+}
+
+function getCustomGasTotal (state) {
+  return state.gas.customData.total
+}
+
+function getBasicGasEstimateLoadingStatus (state) {
+  return state.gas.basicEstimateIsLoading
+}
+
+
+function apiEstimateModifiedToGWEI (estimate) {
+  return multiplyCurrencies(estimate, 0.10, {
+    toNumericBase: 'hex',
+    multiplicandBase: 10,
+    multiplierBase: 10,
+    numberOfDecimals: 9,
+  })
+}
+
+function basicPriceEstimateToETHTotal (estimate, gasLimit) {
+  return conversionUtil(calcGasTotal(gasLimit, estimate), {
+    fromNumericBase: 'hex',
+    toNumericBase: 'dec',
+    fromDenomination: 'GWEI',
+    numberOfDecimals: 9,
+  })
+}
+
+function ethTotalToConvertedCurrency (ethTotal, convertedCurrency, conversionRate) {
+  return conversionUtil(ethTotal, {
+    fromNumericBase: 'dec',
+    toNumericBase: 'dec',
+    fromCurrency: 'ETH',
+    toCurrency: convertedCurrency,
+    numberOfDecimals: 2,
+    conversionRate,
+  })
+}
+
+function formatETHFee (ethFee) {
+  return ethFee + ' ETH'
+}
+
+function getRenderableEthFee (estimate, gasLimit) {
+  return pipe(
+    apiEstimateModifiedToGWEI,
+    partialRight(basicPriceEstimateToETHTotal, [gasLimit]),
+    formatETHFee
+  )(estimate, gasLimit)
+}
+
+function getRenderableConvertedCurrencyFee (estimate, gasLimit, convertedCurrency, conversionRate) {
+  return pipe(
+    apiEstimateModifiedToGWEI,
+    partialRight(basicPriceEstimateToETHTotal, [gasLimit]),
+    partialRight(ethTotalToConvertedCurrency, [convertedCurrency, conversionRate]),
+    partialRight(formatCurrency, [convertedCurrency])
+  )(estimate, gasLimit, convertedCurrency, conversionRate)
+}
+
+function getTimeEstimateInSeconds (blockWaitEstimate, currentBlockTime) {
+  return multiplyCurrencies(blockWaitEstimate, currentBlockTime, {
+    toNumericBase: 'dec',
+    multiplicandBase: 10,
+    multiplierBase: 10,
+    numberOfDecimals: 1,
+  })
+}
+
+function formatTimeEstimate (totalSeconds) {
+  const minutes = Math.floor(totalSeconds / 60)
+  const seconds = Math.floor(totalSeconds % 60)
+  const formattedMin = `${minutes ? minutes + ' min' : ''}`
+  const formattedSec = `${seconds ? seconds + ' sec' : ''}`
+  const formattedCombined = formattedMin && formattedSec
+    ? `~${formattedMin} ${formattedSec}`
+    : '~' + [formattedMin, formattedSec].find(t => t)
+
+  return formattedCombined
+}
+
+function getRenderableTimeEstimate (blockWaitEstimate, currentBlockTime) {
+  return pipe(
+    getTimeEstimateInSeconds,
+    formatTimeEstimate
+  )(blockWaitEstimate, currentBlockTime)
+}
+
+function priceEstimateToWei (priceEstimate) {
+  return conversionUtil(priceEstimate, {
+    fromNumericBase: 'hex',
+    toNumericBase: 'hex',
+    fromDenomination: 'GWEI',
+    toDenomination: 'WEI',
+    numberOfDecimals: 9,
+  })
+}
+
+function getGasPriceInHexWei (price) {
+  return pipe(
+    apiEstimateModifiedToGWEI,
+    priceEstimateToWei,
+    addHexPrefix
+  )(price)
+}
+
+function getRenderableBasicEstimateData (state) {
+  if (getBasicGasEstimateLoadingStatus(state)) {
+    return []
+  }
+
+  const gasLimit = getGasLimit(state)
+  const conversionRate = getConversionRate(state)
+  const currentCurrency = getCurrentCurrency(state)
+  const {
+    gas: {
+      basicEstimates: {
+        safeLow,
+        average,
+        fast,
+        blockTime,
+        safeLowWait,
+        avgWait,
+        fastWait,
+      },
+    },
+  } = state
+
+  return [
+    {
+      feeInPrimaryCurrency: getRenderableConvertedCurrencyFee(fast, gasLimit, currentCurrency, conversionRate),
+      feeInSecondaryCurrency: getRenderableEthFee(fast, gasLimit),
+      timeEstimate: getRenderableTimeEstimate(fastWait, blockTime),
+      priceInHexWei: getGasPriceInHexWei(fast),
+    },
+    {
+      feeInPrimaryCurrency: getRenderableConvertedCurrencyFee(average, gasLimit, currentCurrency, conversionRate),
+      feeInSecondaryCurrency: getRenderableEthFee(average, gasLimit),
+      timeEstimate: getRenderableTimeEstimate(avgWait, blockTime),
+      priceInHexWei: getGasPriceInHexWei(average),
+    },
+    {
+      feeInPrimaryCurrency: getRenderableConvertedCurrencyFee(safeLow, gasLimit, currentCurrency, conversionRate),
+      feeInSecondaryCurrency: getRenderableEthFee(safeLow, gasLimit),
+      timeEstimate: getRenderableTimeEstimate(safeLowWait, blockTime),
+      priceInHexWei: getGasPriceInHexWei(safeLow),
+    },
+  ]
 }

ui/app/selectors/tests/custom-gas.test.js

@@ -0,0 +1,140 @@
+import assert from 'assert'
+import proxyquire from 'proxyquire'
+
+const {
+  getCustomGasErrors,
+  getCustomGasLimit,
+  getCustomGasPrice,
+  getCustomGasTotal,
+  getRenderableBasicEstimateData,
+} = proxyquire('../custom-gas', {})
+
+describe('custom-gas selectors', () => {
+
+  describe('getCustomGasPrice()', () => {
+    it('should return gas.customData.price', () => {
+      const mockState = { gas: { customData: { price: 'mockPrice' } } }
+      assert.equal(getCustomGasPrice(mockState), 'mockPrice')
+    })
+  })
+
+  describe('getCustomGasLimit()', () => {
+    it('should return gas.customData.limit', () => {
+      const mockState = { gas: { customData: { limit: 'mockLimit' } } }
+      assert.equal(getCustomGasLimit(mockState), 'mockLimit')
+    })
+  })
+
+  describe('getCustomGasTotal()', () => {
+    it('should return gas.customData.total', () => {
+      const mockState = { gas: { customData: { total: 'mockTotal' } } }
+      assert.equal(getCustomGasTotal(mockState), 'mockTotal')
+    })
+  })
+
+  describe('getCustomGasErrors()', () => {
+    it('should return gas.errors', () => {
+      const mockState = { gas: { errors: 'mockErrors' } }
+      assert.equal(getCustomGasErrors(mockState), 'mockErrors')
+    })
+  })
+
+  describe('getRenderableBasicEstimateData()', () => {
+    const tests = [
+      {
+        expectedResult: [
+          {
+            feeInPrimaryCurrency: '$0.05',
+            feeInSecondaryCurrency: '0.00021 ETH',
+            timeEstimate: '~7 sec',
+            priceInHexWei: '0x2540be400',
+          },
+          {
+            feeInPrimaryCurrency: '$0.03',
+            feeInSecondaryCurrency: '0.000105 ETH',
+            timeEstimate: '~46 sec',
+            priceInHexWei: '0x12a05f200',
+          },
+          {
+            feeInPrimaryCurrency: '$0.01',
+            feeInSecondaryCurrency: '0.0000525 ETH',
+            timeEstimate: '~1 min 33 sec',
+            priceInHexWei: '0x9502f900',
+          },
+        ],
+        mockState: {
+          metamask: {
+            conversionRate: 255.71,
+            currentCurrency: 'usd',
+            send: {
+              gasLimit: '0x5208',
+            },
+          },
+          gas: {
+            basicEstimates: {
+              blockTime: 14.16326530612245,
+              safeLow: 25,
+              safeLowWait: 6.6,
+              average: 50,
+              avgWait: 3.3,
+              fast: 100,
+              fastWait: 0.5,
+            },
+          },
+        },
+      },
+      {
+        expectedResult: [
+          {
+            feeInPrimaryCurrency: '$1.07',
+            feeInSecondaryCurrency: '0.00042 ETH',
+            timeEstimate: '~14 sec',
+            priceInHexWei: '0x4a817c800',
+          },
+          {
+            feeInPrimaryCurrency: '$0.54',
+            feeInSecondaryCurrency: '0.00021 ETH',
+            timeEstimate: '~1 min 33 sec',
+            priceInHexWei: '0x2540be400',
+          },
+          {
+            feeInPrimaryCurrency: '$0.27',
+            feeInSecondaryCurrency: '0.000105 ETH',
+            timeEstimate: '~3 min 7 sec',
+            priceInHexWei: '0x12a05f200',
+          },
+        ],
+        mockState: {
+          metamask: {
+            conversionRate: 2557.1,
+            currentCurrency: 'usd',
+            send: {
+              gasLimit: '0x5208',
+            },
+          },
+          gas: {
+            basicEstimates: {
+              blockTime: 14.16326530612245,
+              safeLow: 50,
+              safeLowWait: 13.2,
+              average: 100,
+              avgWait: 6.6,
+              fast: 200,
+              fastWait: 1.0,
+            },
+          },
+        },
+      },
+    ]
+    it('should return renderable data about basic estimates', () => {
+      tests.forEach(test => {
+        assert.deepEqual(
+          getRenderableBasicEstimateData(test.mockState),
+          test.expectedResult
+        )
+      })
+    })
+
+  })
+
+})