aboutsummaryrefslogtreecommitdiffstats
path: root/ui/app/add-token.js
blob: f21184270ac3a85c292f66f1270a06aaef3f3d53 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
const inherits = require('util').inherits
const Component = require('react').Component
const h = require('react-hyperscript')
const connect = require('react-redux').connect
const actions = require('./actions')

const ethUtil = require('ethereumjs-util')
const abi = require('human-standard-token-abi')
const Eth = require('ethjs-query')
const EthContract = require('ethjs-contract')

const emptyAddr = '0x0000000000000000000000000000000000000000'

module.exports = connect(mapStateToProps)(AddTokenScreen)

function mapStateToProps (state) {
  return {
  }
}

inherits(AddTokenScreen, Component)
function AddTokenScreen () {
  this.state = {
    warning: null,
    address: null,
    symbol: 'TOKEN',
    decimals: 18,
  }
  Component.call(this)
}

AddTokenScreen.prototype.render = function () {
  const state = this.state
  const props = this.props
  const { warning, symbol, decimals } = state

  return (
    h('.flex-column.flex-grow', [

      // subtitle and nav
      h('.section-title.flex-row.flex-center', [
        h('i.fa.fa-arrow-left.fa-lg.cursor-pointer', {
          onClick: (event) => {
            props.dispatch(actions.goHome())
          },
        }),
        h('h2.page-subtitle', 'Add Token'),
      ]),

      h('.error', {
        style: {
          display: warning ? 'block' : 'none',
          padding: '0 20px',
          textAlign: 'center',
        },
      }, warning),

      // conf view
      h('.flex-column.flex-justify-center.flex-grow.select-none', [
        h('.flex-space-around', {
          style: {
            padding: '20px',
          },
        }, [

          h('div', [
            h('span', {
              style: { fontWeight: 'bold', paddingRight: '10px'},
            }, 'Token Address'),
          ]),

          h('section.flex-row.flex-center', [
            h('input#token-address', {
              name: 'address',
              placeholder: 'Token Address',
              onChange: this.tokenAddressDidChange.bind(this),
              style: {
                width: 'inherit',
                flex: '1 0 auto',
                height: '30px',
                margin: '8px',
              },
            }),
          ]),

          h('div', [
            h('span', {
              style: { fontWeight: 'bold', paddingRight: '10px'},
            }, 'Token Sybmol'),
          ]),

          h('div', { style: {display: 'flex'} }, [
            h('input#token_symbol', {
              placeholder: `Like "ETH"`,
              value: symbol,
              style: {
                width: 'inherit',
                flex: '1 0 auto',
                height: '30px',
                margin: '8px',
              },
              onChange: (event) => {
                var element = event.target
                var symbol = element.value
                this.setState({ symbol })
              },
            }),
          ]),

          h('div', [
            h('span', {
              style: { fontWeight: 'bold', paddingRight: '10px'},
            }, 'Decimals of Precision'),
          ]),

          h('div', { style: {display: 'flex'} }, [
            h('input#token_decimals', {
              value: decimals,
              type: 'number',
              min: 0,
              max: 36,
              style: {
                width: 'inherit',
                flex: '1 0 auto',
                height: '30px',
                margin: '8px',
              },
              onChange: (event) => {
                var element = event.target
                var decimals = element.value.trim()
                this.setState({ decimals })
              },
            }),
          ]),

          h('button', {
            style: {
              alignSelf: 'center',
            },
            onClick: (event) => {
              const valid = this.validateInputs()
              if (!valid) return

              const { address, symbol, decimals } = this.state
              this.checkIfToken(address.trim())
              .then(() => {
                this.props.dispatch(actions.addToken(address.trim(), symbol.trim(), decimals))
              })
              .catch((reason) => {
                this.setState({ warning: 'Not a valid token address.' })
              })
            },
          }, 'Add'),
        ]),
      ]),
    ])
  )
}

AddTokenScreen.prototype.componentWillMount = function () {
  if (typeof global.ethereumProvider === 'undefined') return

  this.eth = new Eth(global.ethereumProvider)
  this.contract = new EthContract(this.eth)
  this.TokenContract = this.contract(abi)
}

AddTokenScreen.prototype.tokenAddressDidChange = function (event) {
  const el = event.target
  const address = el.value.trim()
  if (ethUtil.isValidAddress(address) && address !== emptyAddr) {
    this.setState({ address })
    this.attemptToAutoFillTokenParams(address)
  }
}

AddTokenScreen.prototype.validateInputs = function () {
  let msg = ''
  const state = this.state
  const { address, symbol, decimals } = state

  const validAddress = ethUtil.isValidAddress(address)
  if (!validAddress) {
    msg += 'Address is invalid. '
  }

  const validDecimals = decimals >= 0 && decimals < 36
  if (!validDecimals) {
    msg += 'Decimals must be at least 0, and not over 36. '
  }

  const symbolLen = symbol.trim().length
  const validSymbol = symbolLen > 0 && symbolLen < 10
  if (!validSymbol) {
    msg += 'Symbol must be between 0 and 10 characters.'
  }

  const isValid = validAddress && validDecimals

  if (!isValid) {
    this.setState({
      warning: msg,
    })
  } else {
    this.setState({ warning: null })
  }

  return isValid
}

AddTokenScreen.prototype.checkIfToken = async function (address) {
  const contract = this.TokenContract.at(address)
  const result = await contract.balance(address)
  return result[0].toString()
}

AddTokenScreen.prototype.attemptToAutoFillTokenParams = async function (address) {
  const contract = this.TokenContract.at(address)

  const results = await Promise.all([
    contract.symbol(),
    contract.decimals(),
  ])

  const [ symbol, decimals ] = results
  if (symbol && decimals) {
    console.log('SETTING SYMBOL AND DECIMALS', { symbol, decimals })
    this.setState({ symbol: symbol[0], decimals: decimals[0].toString() })
  }
}