1 files changed, 270 insertions, 0 deletions
diff --git a/ui/app/selectors/custom-gas.js b/ui/app/selectors/custom-gas.js
new file mode 100644
index 000000000..59f240f9c
--- /dev/null
+++ b/ui/app/selectors/custom-gas.js
@@ -0,0 +1,270 @@
+import { pipe, partialRight } from 'ramda'
+import {
+  conversionUtil,
+  multiplyCurrencies,
+} from '../conversion-util'
+import {
+  getCurrentCurrency,
+} from '../selectors'
+import {
+  formatCurrency,
+} from '../helpers/confirm-transaction/util'
+import {
+  decEthToConvertedCurrency as ethTotalToConvertedCurrency,
+} from '../helpers/conversions.util'
+import {
+  formatETHFee,
+} from '../helpers/formatters'
+import {
+  calcGasTotal,
+} from '../components/send/send.utils'
+import { addHexPrefix } from 'ethereumjs-util'
+
+const selectors = {
+  formatTimeEstimate,
+  getAveragePriceEstimateInHexWEI,
+  getFastPriceEstimateInHexWEI,
+  getBasicGasEstimateLoadingStatus,
+  getBasicGasEstimateBlockTime,
+  getCustomGasErrors,
+  getCustomGasLimit,
+  getCustomGasPrice,
+  getCustomGasTotal,
+  getDefaultActiveButtonIndex,
+  getEstimatedGasPrices,
+  getEstimatedGasTimes,
+  getGasEstimatesLoadingStatus,
+  getPriceAndTimeEstimates,
+  getRenderableBasicEstimateData,
+  getRenderableEstimateDataForSmallButtonsFromGWEI,
+  priceEstimateToWei,
+}
+
+module.exports = selectors
+
+const NUMBER_OF_DECIMALS_SM_BTNS = 5
+
+function getCustomGasErrors (state) {
+  return state.gas.errors
+}
+
+function getCustomGasLimit (state) {
+  return state.gas.customData.limit
+}
+
+function getCustomGasPrice (state) {
+  return state.gas.customData.price
+}
+
+function getCustomGasTotal (state) {
+  return state.gas.customData.total
+}
+
+function getBasicGasEstimateLoadingStatus (state) {
+  return state.gas.basicEstimateIsLoading
+}
+
+function getGasEstimatesLoadingStatus (state) {
+  return state.gas.gasEstimatesLoading
+}
+
+function getPriceAndTimeEstimates (state) {
+  return state.gas.priceAndTimeEstimates
+}
+
+function getEstimatedGasPrices (state) {
+  return getPriceAndTimeEstimates(state).map(({ gasprice }) => gasprice)
+}
+
+function getEstimatedGasTimes (state) {
+  return getPriceAndTimeEstimates(state).map(({ expectedTime }) => expectedTime)
+}
+
+function getAveragePriceEstimateInHexWEI (state) {
+  const averagePriceEstimate = state.gas.basicEstimates.average
+  return getGasPriceInHexWei(averagePriceEstimate || '0x0')
+}
+
+function getFastPriceEstimateInHexWEI (state) {
+  const fastPriceEstimate = state.gas.basicEstimates.fast
+  return getGasPriceInHexWei(fastPriceEstimate || '0x0')
+}
+
+function getDefaultActiveButtonIndex (gasButtonInfo, customGasPriceInHex, gasPrice) {
+  return gasButtonInfo.findIndex(({ priceInHexWei }) => {
+    return priceInHexWei === addHexPrefix(customGasPriceInHex || gasPrice)
+  })
+}
+
+function getBasicGasEstimateBlockTime (state) {
+  return state.gas.basicEstimates.blockTime
+}
+
+function basicPriceEstimateToETHTotal (estimate, gasLimit, numberOfDecimals = 9) {
+  return conversionUtil(calcGasTotal(gasLimit, estimate), {
+    fromNumericBase: 'hex',
+    toNumericBase: 'dec',
+    fromDenomination: 'GWEI',
+    numberOfDecimals,
+  })
+}
+
+function getRenderableEthFee (estimate, gasLimit, numberOfDecimals = 9) {
+  return pipe(
+    x => conversionUtil(x, { fromNumericBase: 'dec', toNumericBase: 'hex' }),
+    partialRight(basicPriceEstimateToETHTotal, [gasLimit, numberOfDecimals]),
+    formatETHFee
+  )(estimate, gasLimit)
+}
+
+
+function getRenderableConvertedCurrencyFee (estimate, gasLimit, convertedCurrency, conversionRate) {
+  return pipe(
+    x => conversionUtil(x, { fromNumericBase: 'dec', toNumericBase: 'hex' }),
+    partialRight(basicPriceEstimateToETHTotal, [gasLimit]),
+    partialRight(ethTotalToConvertedCurrency, [convertedCurrency, conversionRate]),
+    partialRight(formatCurrency, [convertedCurrency])
+  )(estimate, gasLimit, convertedCurrency, conversionRate)
+}
+
+function getTimeEstimateInSeconds (blockWaitEstimate) {
+  return multiplyCurrencies(blockWaitEstimate, 60, {
+    toNumericBase: 'dec',
+    multiplicandBase: 10,
+    multiplierBase: 10,
+    numberOfDecimals: 1,
+  })
+}
+
+function formatTimeEstimate (totalSeconds, greaterThanMax, lessThanMin) {
+  const minutes = Math.floor(totalSeconds / 60)
+  const seconds = Math.floor(totalSeconds % 60)
+
+  if (!minutes && !seconds) {
+    return '...'
+  }
+
+  let symbol = '~'
+  if (greaterThanMax) {
+    symbol = '< '
+  } else if (lessThanMin) {
+    symbol = '> '
+  }
+
+  const formattedMin = `${minutes ? minutes + ' min' : ''}`
+  const formattedSec = `${seconds ? seconds + ' sec' : ''}`
+  const formattedCombined = formattedMin && formattedSec
+    ? `${symbol}${formattedMin} ${formattedSec}`
+    : symbol + [formattedMin, formattedSec].find(t => t)
+
+  return formattedCombined
+}
+
+function getRenderableTimeEstimate (blockWaitEstimate) {
+  return pipe(
+    getTimeEstimateInSeconds,
+    formatTimeEstimate
+  )(blockWaitEstimate)
+}
+
+function priceEstimateToWei (priceEstimate) {
+  return conversionUtil(priceEstimate, {
+    fromNumericBase: 'hex',
+    toNumericBase: 'hex',
+    fromDenomination: 'GWEI',
+    toDenomination: 'WEI',
+    numberOfDecimals: 9,
+  })
+}
+
+function getGasPriceInHexWei (price) {
+  return pipe(
+    x => conversionUtil(x, { fromNumericBase: 'dec', toNumericBase: 'hex' }),
+    priceEstimateToWei,
+    addHexPrefix
+  )(price)
+}
+
+function getRenderableBasicEstimateData (state) {
+  if (getBasicGasEstimateLoadingStatus(state)) {
+    return []
+  }
+  const gasLimit = state.metamask.send.gasLimit || getCustomGasLimit(state)
+  const conversionRate = state.metamask.conversionRate
+  const currentCurrency = getCurrentCurrency(state)
+  const {
+    gas: {
+      basicEstimates: {
+        safeLow,
+        fast,
+        fastest,
+        safeLowWait,
+        fastestWait,
+        fastWait,
+      },
+    },
+  } = state
+
+  return [
+    {
+      labelKey: 'fastest',
+      feeInPrimaryCurrency: getRenderableConvertedCurrencyFee(fastest, gasLimit, currentCurrency, conversionRate),
+      feeInSecondaryCurrency: getRenderableEthFee(fastest, gasLimit),
+      timeEstimate: fastestWait && getRenderableTimeEstimate(fastestWait),
+      priceInHexWei: getGasPriceInHexWei(fastest),
+    },
+    {
+      labelKey: 'fast',
+      feeInPrimaryCurrency: getRenderableConvertedCurrencyFee(fast, gasLimit, currentCurrency, conversionRate),
+      feeInSecondaryCurrency: getRenderableEthFee(fast, gasLimit),
+      timeEstimate: fastWait && getRenderableTimeEstimate(fastWait),
+      priceInHexWei: getGasPriceInHexWei(fast),
+    },
+    {
+      labelKey: 'slow',
+      feeInPrimaryCurrency: getRenderableConvertedCurrencyFee(safeLow, gasLimit, currentCurrency, conversionRate),
+      feeInSecondaryCurrency: getRenderableEthFee(safeLow, gasLimit),
+      timeEstimate: safeLowWait && getRenderableTimeEstimate(safeLowWait),
+      priceInHexWei: getGasPriceInHexWei(safeLow),
+    },
+  ]
+}
+
+function getRenderableEstimateDataForSmallButtonsFromGWEI (state) {
+  if (getBasicGasEstimateLoadingStatus(state)) {
+    return []
+  }
+  const gasLimit = state.metamask.send.gasLimit || getCustomGasLimit(state)
+  const conversionRate = state.metamask.conversionRate
+  const currentCurrency = getCurrentCurrency(state)
+  const {
+    gas: {
+      basicEstimates: {
+        safeLow,
+        fast,
+        fastest,
+      },
+    },
+  } = state
+
+  return [
+    {
+      labelKey: 'fastest',
+      feeInSecondaryCurrency: getRenderableConvertedCurrencyFee(fastest, gasLimit, currentCurrency, conversionRate),
+      feeInPrimaryCurrency: getRenderableEthFee(fastest, gasLimit, NUMBER_OF_DECIMALS_SM_BTNS, true),
+      priceInHexWei: getGasPriceInHexWei(fastest, true),
+    },
+    {
+      labelKey: 'fast',
+      feeInSecondaryCurrency: getRenderableConvertedCurrencyFee(fast, gasLimit, currentCurrency, conversionRate),
+      feeInPrimaryCurrency: getRenderableEthFee(fast, gasLimit, NUMBER_OF_DECIMALS_SM_BTNS, true),
+      priceInHexWei: getGasPriceInHexWei(fast, true),
+    },
+    {
+      labelKey: 'slow',
+      feeInSecondaryCurrency: getRenderableConvertedCurrencyFee(safeLow, gasLimit, currentCurrency, conversionRate),
+      feeInPrimaryCurrency: getRenderableEthFee(safeLow, gasLimit, NUMBER_OF_DECIMALS_SM_BTNS, true),
+      priceInHexWei: getGasPriceInHexWei(safeLow, true),
+    },
+  ]
+}