Set gas price allows for WEI precision.

ui/app/components/customize-gas-modal/index.js

@@ -73,6 +73,8 @@ function getOriginalState (props) {
     gasLimit,
     gasTotal,
     error: null,
+    priceSigZeros: '',
+    priceSigDec: '',
   }
 }
 
@@ -167,7 +169,15 @@ CustomizeGasModal.prototype.convertAndSetGasLimit = function (newGasLimit) {
 }
 
 CustomizeGasModal.prototype.convertAndSetGasPrice = function (newGasPrice) {
-  const { gasLimit } = this.state
+  const { gasLimit, priceSigZeros } = this.state
+  const priceStrLength = newGasPrice.length
+  const sigZeros = String(newGasPrice).match(/^\d+[.]\d*?(0+)$/)
+  const sigDec = String(newGasPrice).match(/^\d+([.])0*$/)
+
+  this.setState({
+    priceSigZeros: sigZeros && sigZeros[1] || '',
+    priceSigDec: sigDec && sigDec[1] || '',
+  })
 
   const gasPrice = conversionUtil(newGasPrice, {
     fromNumericBase: 'dec',
@@ -189,15 +199,17 @@ CustomizeGasModal.prototype.convertAndSetGasPrice = function (newGasPrice) {
 
 CustomizeGasModal.prototype.render = function () {
   const { hideModal } = this.props
-  const { gasPrice, gasLimit, gasTotal, error } = this.state
+  const { gasPrice, gasLimit, gasTotal, error, priceSigZeros, priceSigDec } = this.state
 
-  const convertedGasPrice = conversionUtil(gasPrice, {
+  let convertedGasPrice = conversionUtil(gasPrice, {
     fromNumericBase: 'hex',
     toNumericBase: 'dec',
     fromDenomination: 'WEI',
     toDenomination: 'GWEI',
   })
 
+  convertedGasPrice += convertedGasPrice.match(/[.]/) ? priceSigZeros : `${priceSigDec}${priceSigZeros}`
+
   const convertedGasLimit = conversionUtil(gasLimit, {
     fromNumericBase: 'hex',
     toNumericBase: 'dec',
@@ -222,7 +234,7 @@ CustomizeGasModal.prototype.render = function () {
           value: convertedGasPrice,
           min: MIN_GAS_PRICE_GWEI,
           // max: 1000,
-          step: MIN_GAS_PRICE_GWEI,
+          step: multiplyCurrencies(MIN_GAS_PRICE_GWEI, 10),
           onChange: value => this.convertAndSetGasPrice(value),
           title: 'Gas Price (GWEI)',
           copy: 'We calculate the suggested gas prices based on network success rates.',

ui/app/components/input-number.js

@@ -5,6 +5,7 @@ const {
   addCurrencies,
   conversionGTE,
   conversionLTE,
+  subtractCurrencies,
   toNegative,
 } = require('../conversion-util')
 
@@ -17,18 +18,24 @@ function InputNumber () {
   this.setValue = this.setValue.bind(this)
 }
 
+function isValidInput (text) {
+  const re = /^([1-9]\d*|0)(\.|\.\d*)?$/
+  return re.test(text)
+}
+
 InputNumber.prototype.setValue = function (newValue) {
+  if (newValue && !isValidInput(newValue)) return
   const { fixed, min = -1, max = Infinity, onChange } = this.props
 
-  newValue = Number(fixed ? newValue.toFixed(4) : newValue)
+  newValue = fixed ? newValue.toFixed(4) : newValue
 
   const newValueGreaterThanMin = conversionGTE(
-    { value: newValue, fromNumericBase: 'dec' },
+    { value: newValue || '0', fromNumericBase: 'dec' },
     { value: min, fromNumericBase: 'hex' },
   )
 
   const newValueLessThanMax = conversionLTE(
-    { value: newValue, fromNumericBase: 'dec' },
+    { value: newValue || '0', fromNumericBase: 'dec' },
     { value: max, fromNumericBase: 'hex' },
   )
   if (newValueGreaterThanMin && newValueLessThanMax) {
@@ -46,8 +53,8 @@ InputNumber.prototype.render = function () {
   return h('div.customize-gas-input-wrapper', {}, [
     h('input.customize-gas-input', {
       placeholder,
-      type: 'number',
       value,
+      step,
       onChange: (e) => this.setValue(e.target.value),
     }),
     h('span.gas-tooltip-input-detail', {}, [unitLabel]),
@@ -57,7 +64,7 @@ InputNumber.prototype.render = function () {
       }),
       h('i.fa.fa-angle-down', {
         style: { cursor: 'pointer' },
-        onClick: () => this.setValue(addCurrencies(value, toNegative(step))),
+        onClick: () => this.setValue(subtractCurrencies(value, step)),
       }),
     ]),
   ])

ui/app/components/send/send-constants.js

@@ -11,6 +11,7 @@ const MIN_GAS_PRICE_GWEI = ethUtil.addHexPrefix(conversionUtil(MIN_GAS_PRICE_HEX
   toDenomination: 'GWEI',
   fromNumericBase: 'hex',
   toNumericBase: 'hex',
+  numberOfDecimals: 1,
 }))
 
 const MIN_GAS_TOTAL = multiplyCurrencies(MIN_GAS_LIMIT_HEX, MIN_GAS_PRICE_HEX, {

ui/app/conversion-util.js

@@ -53,7 +53,7 @@ const toNormalizedDenomination = {
 }
 const toSpecifiedDenomination = {
   WEI: bigNumber => bigNumber.times(BIG_NUMBER_WEI_MULTIPLIER).round(),
-  GWEI: bigNumber => bigNumber.times(BIG_NUMBER_GWEI_MULTIPLIER).round(1),
+  GWEI: bigNumber => bigNumber.times(BIG_NUMBER_GWEI_MULTIPLIER).round(9),
 }
 const baseChange = {
   hex: n => n.toString(16),