Graphical gas price selection (#2898)

* Added gasPriceStatistics

* WIP graph fas price stats (#2142)

* Chart to select gas price in Extra Tx (#2142)

* Gas Selection UI

* Gas Price Selection: better UI (right octiles, point on graph) (#2142)

* Gas Price Selection chart update using D3 (#2142)

* Working UI, more fluid... (#2142)

* Using the new gasPriceHistogram Call: display histogram (#2142)

* Code Clean

* Updated gas Selection explaination

* PR grumble // Gas Price Selector (#2898)

* Fixing linting issues

js/package.json

@@ -113,6 +113,7 @@
     "bignumber.js": "^2.3.0",
     "blockies": "0.0.2",
     "bytes": "^2.4.0",
+    "chart.js": "^2.3.0",
     "es6-promise": "^3.2.1",
     "file-saver": "^1.3.3",
     "format-json": "^1.0.3",
@@ -128,12 +129,14 @@
     "qs": "^6.3.0",
     "react": "^15.2.1",
     "react-addons-css-transition-group": "^15.2.1",
+    "react-chartjs-2": "^1.5.0",
     "react-dom": "^15.2.1",
     "react-redux": "^4.4.5",
     "react-router": "^2.6.1",
     "react-router-redux": "^4.0.5",
     "react-tap-event-plugin": "^1.0.0",
     "react-tooltip": "^2.0.3",
+    "recharts": "^0.15.2",
     "redux": "^3.5.2",
     "redux-actions": "^0.10.1",
     "redux-thunk": "^2.1.0",

js/src/modals/Transfer/Extras/extras.js

@@ -17,6 +17,7 @@
 import React, { Component, PropTypes } from 'react';
 
 import Form, { Input } from '../../../ui/Form';
+import GasPriceSelector from '../GasPriceSelector';
 
 import styles from '../transfer.css';
 
@@ -28,50 +29,83 @@ export default class Extras extends Component {
     gas: PropTypes.string,
     gasEst: PropTypes.string,
     gasError: PropTypes.string,
-    gasPrice: PropTypes.string,
+    gasPrice: PropTypes.oneOfType([
+      PropTypes.string,
+      PropTypes.object
+    ]),
     gasPriceDefault: PropTypes.string,
     gasPriceError: PropTypes.string,
+    gasPriceHistogram: PropTypes.object,
     total: PropTypes.string,
     totalError: PropTypes.string,
     onChange: PropTypes.func.isRequired
   }
 
   render () {
-    const { gas, gasError, gasEst, gasPrice, gasPriceDefault, gasPriceError, total, totalError } = this.props;
+    const { gas, gasPrice, gasError, gasEst, gasPriceDefault, gasPriceError, gasPriceHistogram, total, totalError } = this.props;
+
     const gasLabel = `gas amount (estimated: ${gasEst})`;
     const priceLabel = `gas price (current: ${gasPriceDefault})`;
 
     return (
       <Form>
+
         { this.renderData() }
+
         <div className={ styles.columns }>
-          <div>
+          <div style={ { flex: 65 } }>
-            <Input
+            <GasPriceSelector
-              label={ gasLabel }
+              gasPriceHistogram={ gasPriceHistogram }
-              hint='the amount of gas to use for the transaction'
+              gasPrice={ gasPrice }
-              error={ gasError }
+              onChange={ this.onEditGasPrice }
-              value={ gas }
+            />
-              onChange={ this.onEditGas } />
           </div>
-          <div>
+
-            <Input
+          <div
-              label={ priceLabel }
+            className={ styles.row }
-              hint='the price of gas to use for the transaction'
+            style={ {
-              error={ gasPriceError }
+              flex: 35, paddingLeft: '1rem',
-              value={ gasPrice }
+              justifyContent: 'space-around',
-              onChange={ this.onEditGasPrice } />
+              paddingBottom: 12
+            } }
+          >
+            <div className={ styles.row }>
+              <Input
+                label={ gasLabel }
+                hint='the amount of gas to use for the transaction'
+                error={ gasError }
+                value={ gas }
+                onChange={ this.onEditGas } />
+
+              <Input
+                label={ priceLabel }
+                hint='the price of gas to use for the transaction'
+                error={ gasPriceError }
+                value={ (gasPrice || '').toString() }
+                onChange={ this.onEditGasPrice } />
+            </div>
+
+            <div className={ styles.row }>
+              <Input
+                disabled
+                label='total transaction amount'
+                hint='the total amount of the transaction'
+                error={ totalError }
+                value={ `${total} ETH` } />
+            </div>
           </div>
         </div>
-        <div className={ styles.columns }>
+
-          <div>
+        <div>
-            <Input
+          <p className={ styles.gasPriceDesc }>
-              disabled
+            You can choose the gas price based on the
-              label='total transaction amount'
+            distribution of recent included transactions' gas prices.
-              hint='the total amount of the transaction'
+            The lower the gas price is, the cheaper the transaction will
-              error={ totalError }
+            be. The higher the gas price is, the faster it should
-              value={ `${total} ETH` } />
+            get mined by the network.
-          </div>
+          </p>
         </div>
+
       </Form>
     );
   }
@@ -99,8 +133,8 @@ export default class Extras extends Component {
     this.props.onChange('gas', event.target.value);
   }
 
-  onEditGasPrice = (event) => {
+  onEditGasPrice = (event, value) => {
-    this.props.onChange('gasPrice', event.target.value);
+    this.props.onChange('gasPrice', value);
   }
 
   onEditData = (event) => {

js/src/modals/Transfer/GasPriceSelector/gasPriceSelector.css

@@ -0,0 +1,17 @@
+/* Copyright 2015, 2016 Ethcore (UK) Ltd.
+/* This file is part of Parity.
+/*
+/* Parity is free software: you can redistribute it and/or modify
+/* it under the terms of the GNU General Public License as published by
+/* the Free Software Foundation, either version 3 of the License, or
+/* (at your option) any later version.
+/*
+/* Parity is distributed in the hope that it will be useful,
+/* but WITHOUT ANY WARRANTY; without even the implied warranty of
+/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+/* GNU General Public License for more details.
+/*
+/* You should have received a copy of the GNU General Public License
+/* along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+*/
+

js/src/modals/Transfer/GasPriceSelector/gasPriceSelector.js

@@ -0,0 +1,556 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+import React, { Component, PropTypes } from 'react';
+
+import {
+  Bar, BarChart,
+  Rectangle,
+  Scatter, ScatterChart,
+  Tooltip,
+  XAxis, YAxis,
+  Dot,
+  ResponsiveContainer
+} from 'recharts';
+
+import Slider from 'material-ui/Slider';
+import BigNumber from 'bignumber.js';
+
+import componentStyles from './gasPriceSelector.css';
+import mainStyles from '../transfer.css';
+
+const styles = Object.assign({}, mainStyles, componentStyles);
+
+const COLORS = {
+  default: 'rgba(255, 99, 132, 0.2)',
+  selected: 'rgba(255, 99, 132, 0.5)',
+  hover: 'rgba(255, 99, 132, 0.15)',
+  grid: 'rgba(255, 99, 132, 0.5)',
+  line: 'rgb(255, 99, 132)',
+  intersection: '#fff'
+};
+
+const countModifier = (count) => {
+  const val = count.toNumber ? count.toNumber() : count;
+  return Math.log10(val + 1) + 0.1;
+};
+
+class CustomCursor extends Component {
+  static propTypes = {
+    x: PropTypes.number,
+    y: PropTypes.number,
+    width: PropTypes.number,
+    height: PropTypes.number,
+    onClick: PropTypes.func,
+    getIndex: PropTypes.func,
+    counts: PropTypes.array,
+    yDomain: PropTypes.array
+  }
+
+  render () {
+    const { x, y, width, height, getIndex, counts, yDomain } = this.props;
+
+    const index = getIndex();
+
+    if (index === -1) {
+      return null;
+    }
+
+    const count = countModifier(counts[index]);
+    const barHeight = (count / yDomain[1]) * (y + height);
+
+    return (
+      <g>
+        <Rectangle
+          x={ x }
+          y={ 0 }
+          width={ width }
+          height={ height + y }
+          fill='transparent'
+          onClick={ this.onClick }
+        />
+        <Rectangle
+          x={ x }
+          y={ y + (height - barHeight) }
+          width={ width }
+          height={ barHeight }
+          fill={ COLORS.hover }
+          onClick={ this.onClick }
+        />
+      </g>
+    );
+  }
+
+  onClick = () => {
+    const { onClick, getIndex } = this.props;
+    const index = getIndex();
+    onClick({ index });
+  }
+}
+
+class CustomBar extends Component {
+  static propTypes = {
+    selected: PropTypes.number,
+    x: PropTypes.number,
+    y: PropTypes.number,
+    width: PropTypes.number,
+    height: PropTypes.number,
+    index: PropTypes.number,
+    onClick: PropTypes.func
+  }
+
+  render () {
+    const { x, y, selected, index, width, height, onClick } = this.props;
+
+    const fill = selected === index
+      ? COLORS.selected
+      : COLORS.default;
+
+    const borderWidth = 0.5;
+    const borderColor = 'rgba(255, 255, 255, 0.5)';
+
+    return (
+      <g>
+        <Rectangle
+          x={ x - borderWidth }
+          y={ y }
+          width={ borderWidth }
+          height={ height }
+          fill={ borderColor }
+        />
+        <Rectangle
+          x={ x + width }
+          y={ y }
+          width={ borderWidth }
+          height={ height }
+          fill={ borderColor }
+        />
+        <Rectangle
+          x={ x - borderWidth }
+          y={ y - borderWidth }
+          width={ width + borderWidth * 2 }
+          height={ borderWidth }
+          fill={ borderColor }
+        />
+        <Rectangle
+          x={ x }
+          y={ y }
+          width={ width }
+          height={ height }
+          fill={ fill }
+          onClick={ onClick }
+        />
+      </g>
+    );
+  }
+}
+
+class CustomizedShape extends Component {
+  static propTypes = {
+    showValue: PropTypes.number.isRequired,
+    cx: PropTypes.number,
+    cy: PropTypes.number,
+    payload: PropTypes.object
+  }
+
+  render () {
+    const { cx, cy, showValue, payload } = this.props;
+
+    if (showValue !== payload.y) {
+      return null;
+    }
+
+    return (
+      <g>
+        <Dot
+          style={ { fill: 'white' } }
+          cx={ cx }
+          cy={ cy }
+          r={ 5 }
+        />
+        <Dot
+          style={ { fill: 'rgb(255, 99, 132)' } }
+          cx={ cx }
+          cy={ cy }
+          r={ 3 }
+        />
+      </g>
+    );
+  }
+}
+
+class CustomTooltip extends Component {
+  static propTypes = {
+    gasPriceHistogram: PropTypes.shape({
+      bucketBounds: PropTypes.array.isRequired,
+      counts: PropTypes.array.isRequired
+    }).isRequired,
+    type: PropTypes.string,
+    payload: PropTypes.array,
+    label: PropTypes.number,
+    active: PropTypes.bool
+  }
+
+  render () {
+    const { active, label, gasPriceHistogram } = this.props;
+
+    if (!active) {
+      return null;
+    }
+
+    const index = label;
+
+    const count = gasPriceHistogram.counts[index];
+    const minGasPrice = gasPriceHistogram.bucketBounds[index];
+    const maxGasPrice = gasPriceHistogram.bucketBounds[index + 1];
+
+    return (
+      <div>
+        <p className='label'>
+          { count.toNumber() } transactions
+          with gas price set from
+          <span> { minGasPrice.toFormat(0) } </span>
+          to
+          <span> { maxGasPrice.toFormat(0) } </span>
+        </p>
+      </div>
+    );
+  }
+}
+
+export default class GasPriceSelector extends Component {
+  static propTypes = {
+    gasPriceHistogram: PropTypes.shape({
+      bucketBounds: PropTypes.array.isRequired,
+      counts: PropTypes.array.isRequired
+    }).isRequired,
+    onChange: PropTypes.func.isRequired,
+
+    gasPrice: PropTypes.oneOfType([
+      PropTypes.string,
+      PropTypes.object
+    ])
+  }
+
+  state = {
+    gasPrice: null,
+    sliderValue: 0.5,
+    selectedIndex: 0,
+
+    chartData: {
+      values: [],
+      xDomain: [],
+      yDomain: [],
+      N: 0
+    }
+  }
+
+  componentWillMount () {
+    this.computeCharts();
+    this.setGasPrice();
+  }
+
+  componentWillReceiveProps (nextProps) {
+    if (nextProps.gasPrice !== this.props.gasPrice) {
+      this.setGasPrice(nextProps);
+    }
+  }
+
+  componentWillUpdate (nextProps, nextState) {
+    if (Math.floor(nextState.sliderValue) !== Math.floor(this.state.sliderValue)) {
+      this.updateSelectedBarChart(nextState);
+    }
+  }
+
+  render () {
+    return (
+      <div>
+        { this.renderChart() }
+        { this.renderSlider() }
+      </div>
+    );
+  }
+
+  renderSlider () {
+    const { sliderValue } = this.state;
+
+    return (<div className={ styles.columns }>
+      <Slider
+        min={ 0 }
+        max={ 1 }
+        value={ sliderValue }
+        onChange={ this.onEditGasPriceSlider }
+        style={ {
+          flex: 1,
+          padding: '0 0.3em'
+        } }
+        sliderStyle={ {
+          marginBottom: 12
+        } }
+      />
+    </div>);
+  }
+
+  renderChart () {
+    const { gasPriceHistogram } = this.props;
+    const { chartData, sliderValue, selectedIndex } = this.state;
+
+    if (chartData.values.length === 0) {
+      return null;
+    }
+
+    const height = 300;
+    const countIndex = Math.max(0, Math.min(selectedIndex, gasPriceHistogram.counts.length - 1));
+    const selectedCount = countModifier(gasPriceHistogram.counts[countIndex]);
+
+    return (<div className={ styles.columns }>
+      <div style={ { flex: 1, height } }>
+        <div className={ styles.chart }>
+          <ResponsiveContainer
+            height={ height }
+          >
+            <ScatterChart
+              margin={ { top: 0, right: 0, left: 0, bottom: 0 } }
+            >
+              <Scatter
+                data={ [
+                  { x: sliderValue, y: 0 },
+                  { x: sliderValue, y: selectedCount },
+                  { x: sliderValue, y: chartData.yDomain[1] }
+                ] }
+                shape={ <CustomizedShape showValue={ selectedCount } /> }
+                line
+                isAnimationActive={ false }
+              />
+
+              <XAxis
+                hide
+                height={ 0 }
+                dataKey='x'
+                domain={ [0, 1] }
+              />
+              <YAxis
+                hide
+                width={ 0 }
+                dataKey='y'
+                domain={ chartData.yDomain }
+              />
+            </ScatterChart>
+          </ResponsiveContainer>
+        </div>
+
+        <div className={ styles.chart }>
+          <ResponsiveContainer
+            height={ height }
+          >
+            <BarChart
+              data={ chartData.values }
+              margin={ { top: 0, right: 0, left: 0, bottom: 0 } }
+              barCategoryGap={ 1 }
+              ref='barChart'
+            >
+              <Bar
+                dataKey='value'
+                stroke={ COLORS.line }
+                onClick={ this.onClickGasPrice }
+                shape={ <CustomBar selected={ selectedIndex } onClick={ this.onClickGasPrice } /> }
+              />
+
+              <Tooltip
+                wrapperStyle={ {
+                  backgroundColor: 'rgba(0, 0, 0, 0.75)',
+                  padding: '0 0.5em',
+                  fontSize: '0.9em'
+                } }
+                cursor={ this.renderCustomCursor() }
+                content={ <CustomTooltip gasPriceHistogram={ gasPriceHistogram } /> }
+              />
+
+              <XAxis
+                hide
+                dataKey='index'
+                type='category'
+                domain={ chartData.xDomain }
+              />
+              <YAxis
+                hide
+                type='number'
+                domain={ chartData.yDomain }
+              />
+            </BarChart>
+          </ResponsiveContainer>
+        </div>
+      </div>
+    </div>);
+  }
+
+  renderCustomCursor = () => {
+    const { gasPriceHistogram } = this.props;
+    const { chartData } = this.state;
+
+    return (
+      <CustomCursor
+        getIndex={ this.getBarHoverIndex }
+        onClick={ this.onClickGasPrice }
+        counts={ gasPriceHistogram.counts }
+        yDomain={ chartData.yDomain }
+      />
+    );
+  }
+
+  getBarHoverIndex = () => {
+    const { barChart } = this.refs;
+
+    if (!barChart || !barChart.state) {
+      return -1;
+    }
+
+    return barChart.state.activeTooltipIndex;
+  }
+
+  computeChartsData () {
+    const { gasPriceChartData } = this.state;
+    const { gasPriceHistogram } = this.props;
+
+    const values = gasPriceChartData
+      .map((value, index) => ({ value, index }));
+
+    const N = values.length - 1;
+    const maxGasCounts = countModifier(
+      gasPriceHistogram
+        .counts
+        .reduce((max, count) => count.greaterThan(max) ? count : max, 0)
+    );
+
+    const xDomain = [0, N];
+    const yDomain = [0, maxGasCounts * 1.1];
+
+    const chartData = {
+      values, N,
+      xDomain, yDomain
+    };
+
+    this.setState({ chartData }, () => {
+      this.updateSelectedBarChart();
+    });
+  }
+
+  computeCharts (props = this.props) {
+    const { gasPriceHistogram } = props;
+
+    const gasPriceChartData = gasPriceHistogram
+      .counts
+      .map(count => countModifier(count));
+
+    this.setState(
+      { gasPriceChartData },
+      () => this.computeChartsData()
+    );
+  }
+
+  updateSelectedBarChart (state = this.state) {
+  }
+
+  setGasPrice (props = this.props) {
+    const { gasPrice, gasPriceHistogram } = props;
+
+    // If no gas price yet...
+    if (!gasPrice) {
+      return this.setSliderValue(0.5);
+    }
+
+    const bnGasPrice = (typeof gasPrice === 'string')
+      ? new BigNumber(gasPrice)
+      : gasPrice;
+
+    // If gas price hasn't changed
+    if (this.state.gasPrice && bnGasPrice.equals(this.state.gasPrice)) {
+      return;
+    }
+
+    const gasPrices = gasPriceHistogram.bucketBounds;
+    const startIndex = gasPrices
+      .findIndex(price => price.greaterThan(bnGasPrice)) - 1;
+
+    // gasPrice Lower than the max in histogram
+    if (startIndex === -1) {
+      return this.setSliderValue(0, bnGasPrice);
+    }
+
+    // gasPrice Greater than the max in histogram
+    if (startIndex === -2) {
+      return this.setSliderValue(1, bnGasPrice);
+    }
+
+    const priceA = gasPrices[startIndex];
+    const priceB = gasPrices[startIndex + 1];
+
+    const sliderValueDec = bnGasPrice
+      .minus(priceA)
+      .dividedBy(priceB.minus(priceA))
+      .toNumber();
+
+    const sliderValue = (startIndex + sliderValueDec) / (gasPrices.length - 1);
+    this.setSliderValue(sliderValue, bnGasPrice);
+  }
+
+  setSliderValue (value, gasPrice = this.state.gasPrice) {
+    const { gasPriceHistogram } = this.props;
+
+    const N = gasPriceHistogram.bucketBounds.length - 1;
+
+    const sliderValue = Math.max(0, Math.min(value, 1));
+    const selectedIndex = Math.floor(sliderValue * N);
+
+    this.setState({ sliderValue, gasPrice, selectedIndex });
+  }
+
+  onBarChartMouseUp = (event) => {
+    console.log(event);
+  }
+
+  onClickGasPrice = (bar) => {
+    const { index } = bar;
+
+    const ratio = (index + 0.5) / (this.state.chartData.N + 1);
+
+    this.onEditGasPriceSlider(null, ratio);
+  }
+
+  onEditGasPriceSlider = (event, sliderValue) => {
+    const { gasPriceHistogram } = this.props;
+
+    const gasPrices = gasPriceHistogram.bucketBounds;
+    const N = gasPrices.length - 1;
+    const gasPriceAIdx = Math.floor(sliderValue * N);
+    const gasPriceBIdx = gasPriceAIdx + 1;
+
+    if (gasPriceBIdx === N + 1) {
+      const gasPrice = gasPrices[gasPriceAIdx];
+      this.props.onChange(event, gasPrice);
+      return;
+    }
+
+    const gasPriceA = gasPrices[gasPriceAIdx];
+    const gasPriceB = gasPrices[gasPriceBIdx];
+
+    const mult = Math.round((sliderValue % 1) * 100) / 100;
+    const gasPrice = gasPriceA.plus(gasPriceB.minus(gasPriceA).times(mult));
+
+    this.setSliderValue(sliderValue, gasPrice);
+    this.props.onChange(event, gasPrice);
+  }
+}

js/src/modals/Transfer/GasPriceSelector/index.js

@@ -0,0 +1,17 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+export default from './gasPriceSelector';

js/src/modals/Transfer/transfer.css

@@ -25,6 +25,13 @@
   position: relative;
 }
 
+.row {
+  display: flex;
+  flex-wrap: wrap;
+  position: relative;
+  flex-direction: column;
+}
+
 .columns>div {
   flex: 0 1 50%;
   width: 50%;
@@ -131,3 +138,16 @@
 .inputoverride {
   padding-top: 24px !important;
 }
+
+.contentTitle {
+  font-size: 1.2rem;
+}
+
+.chart {
+  position: absolute;
+  width: 100%;
+}
+
+.gasPriceDesc {
+  font-size: 0.9em;
+}

js/src/modals/Transfer/transfer.js

@@ -62,6 +62,7 @@ export default class Transfer extends Component {
     gasEst: '0',
     gasError: null,
     gasPrice: DEFAULT_GASPRICE,
+    gasPriceHistogram: {},
     gasPriceError: null,
     recipient: '',
     recipientError: ERRORS.requireRecipient,
@@ -89,7 +90,9 @@ export default class Transfer extends Component {
         current={ stage }
         steps={ extras ? STAGES_EXTRA : STAGES_BASIC }
         waiting={ extras ? [2] : [1] }
-        visible>
+        visible
+        scroll
+      >
         { this.renderPage() }
       </Modal>
     );
@@ -169,6 +172,10 @@ export default class Transfer extends Component {
   }
 
   renderExtrasPage () {
+    if (!this.state.gasPriceHistogram) {
+      return null;
+    }
+
     return (
       <Extras
         isEth={ this.state.isEth }
@@ -180,6 +187,7 @@ export default class Transfer extends Component {
         gasPrice={ this.state.gasPrice }
         gasPriceDefault={ this.state.gasPriceDefault }
         gasPriceError={ this.state.gasPriceError }
+        gasPriceHistogram={ this.state.gasPriceHistogram }
         total={ this.state.total }
         totalError={ this.state.totalError }
         onChange={ this.onUpdateDetails } />
@@ -581,12 +589,16 @@ export default class Transfer extends Component {
   getDefaults = () => {
     const { api } = this.context;
 
-    api.eth
+    Promise
-      .gasPrice()
+      .all([
-      .then((gasPrice) => {
+        api.ethcore.gasPriceHistogram(),
+        api.eth.gasPrice()
+      ])
+      .then(([gasPriceHistogram, gasPrice]) => {
         this.setState({
           gasPrice: gasPrice.toString(),
-          gasPriceDefault: gasPrice.toFormat()
+          gasPriceDefault: gasPrice.toFormat(),
+          gasPriceHistogram
         }, this.recalculate);
       })
       .catch((error) => {

js/src/views/Account/account.js

@@ -81,11 +81,18 @@ class Account extends Component {
   }
 
   renderActionbar () {
+    const { address } = this.props.params;
+    const { balances } = this.props;
+    const balance = balances[address];
+
+    const showTransferButton = !!(balance && balance.tokens);
+
     const buttons = [
       <Button
         key='transferFunds'
         icon={ <ContentSend /> }
         label='transfer'
+        disabled={ !showTransferButton }
         onClick={ this.onTransferClick } />,
       <Button
         key='shapeshift'