1 files changed, 179 insertions, 7 deletions
diff --git a/ui/app/selectors/custom-gas.js b/ui/app/selectors/custom-gas.js
index 97280190f..ff2fd0e05 100644
--- a/ui/app/selectors/custom-gas.js
+++ b/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),
+    },
+  ]
 }