343 lines
10 KiB
JavaScript
343 lines
10 KiB
JavaScript
const inherits = require('util').inherits
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const Component = require('react').Component
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const classnames = require('classnames')
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const h = require('react-hyperscript')
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const connect = require('react-redux').connect
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const Fuse = require('fuse.js')
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const contractMap = require('eth-contract-metadata')
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const TokenBalance = require('./components/token-balance')
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const Identicon = require('./components/identicon')
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const contractList = Object.entries(contractMap).map(([ _, tokenData]) => tokenData)
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const fuse = new Fuse(contractList, {
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shouldSort: true,
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threshold: 0.45,
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location: 0,
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distance: 100,
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maxPatternLength: 32,
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minMatchCharLength: 1,
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keys: ['address', 'name', 'symbol'],
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})
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const actions = require('./actions')
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const ethUtil = require('ethereumjs-util')
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const abi = require('human-standard-token-abi')
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const Eth = require('ethjs-query')
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const EthContract = require('ethjs-contract')
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const emptyAddr = '0x0000000000000000000000000000000000000000'
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module.exports = connect(mapStateToProps, mapDispatchToProps)(AddTokenScreen)
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function mapStateToProps (state) {
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return {
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identities: state.metamask.identities,
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}
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}
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function mapDispatchToProps (dispatch) {
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return {
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goHome: () => dispatch(actions.goHome()),
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addTokens: tokens => dispatch(actions.addTokens(tokens)),
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}
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}
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inherits(AddTokenScreen, Component)
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function AddTokenScreen () {
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this.state = {
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isShowingConfirmation: false,
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customAddress: '',
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customSymbol: '',
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customDecimals: 0,
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searchQuery: '',
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isCollapsed: true,
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selectedTokens: {},
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errors: {},
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}
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this.tokenAddressDidChange = this.tokenAddressDidChange.bind(this)
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this.onNext = this.onNext.bind(this)
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Component.call(this)
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}
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AddTokenScreen.prototype.componentWillMount = function () {
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if (typeof global.ethereumProvider === 'undefined') return
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this.eth = new Eth(global.ethereumProvider)
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this.contract = new EthContract(this.eth)
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this.TokenContract = this.contract(abi)
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}
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AddTokenScreen.prototype.toggleToken = function (address, token) {
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const { selectedTokens, errors } = this.state
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const { [address]: selectedToken } = selectedTokens
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this.setState({
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selectedTokens: {
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...selectedTokens,
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[address]: selectedToken ? null : token,
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},
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errors: {
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...errors,
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tokenSelector: null,
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},
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})
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}
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AddTokenScreen.prototype.onNext = function () {
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const { isValid, errors } = this.validate()
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return !isValid
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? this.setState({ errors })
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: this.setState({ isShowingConfirmation: true })
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}
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AddTokenScreen.prototype.tokenAddressDidChange = function (e) {
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const customAddress = e.target.value.trim()
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this.setState({ customAddress })
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if (ethUtil.isValidAddress(customAddress) && customAddress !== emptyAddr) {
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this.attemptToAutoFillTokenParams(customAddress)
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} else {
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this.setState({
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customSymbol: '',
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customDecimals: 0,
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})
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}
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}
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AddTokenScreen.prototype.validate = function () {
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const errors = {}
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const identitiesList = Object.keys(this.props.identities)
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const { customAddress, customSymbol, customDecimals, selectedTokens } = this.state
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const standardAddress = ethUtil.addHexPrefix(customAddress).toLowerCase()
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if (customAddress) {
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const validAddress = ethUtil.isValidAddress(customAddress)
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if (!validAddress) {
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errors.customAddress = 'Address is invalid. '
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}
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const validDecimals = customDecimals >= 0 && customDecimals < 36
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if (!validDecimals) {
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errors.customDecimals = 'Decimals must be at least 0, and not over 36.'
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}
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const symbolLen = customSymbol.trim().length
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const validSymbol = symbolLen > 0 && symbolLen < 10
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if (!validSymbol) {
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errors.customSymbol = 'Symbol must be between 0 and 10 characters.'
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}
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const ownAddress = identitiesList.includes(standardAddress)
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if (ownAddress) {
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errors.customAddress = 'Personal address detected. Input the token contract address.'
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}
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} else if (
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Object.entries(selectedTokens)
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.reduce((isEmpty, [ symbol, isSelected ]) => (
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isEmpty && !isSelected
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), true)
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) {
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errors.tokenSelector = 'Must select at least 1 token.'
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}
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return {
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isValid: !Object.keys(errors).length,
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errors,
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}
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}
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AddTokenScreen.prototype.attemptToAutoFillTokenParams = async function (address) {
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const contract = this.TokenContract.at(address)
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const results = await Promise.all([
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contract.symbol(),
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contract.decimals(),
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])
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const [ symbol, decimals ] = results
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if (symbol && decimals) {
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this.setState({
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customSymbol: symbol[0],
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customDecimals: decimals[0].toString(),
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})
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}
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}
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AddTokenScreen.prototype.renderCustomForm = function () {
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const { customAddress, customSymbol, customDecimals, errors } = this.state
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return !this.state.isCollapsed && (
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h('div.add-token__add-custom-form', [
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h('div', {
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className: classnames('add-token__add-custom-field', {
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'add-token__add-custom-field--error': errors.customAddress,
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}),
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}, [
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h('div.add-token__add-custom-label', 'Token Address'),
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h('input.add-token__add-custom-input', {
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type: 'text',
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onChange: this.tokenAddressDidChange,
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value: customAddress,
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}),
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h('div.add-token__add-custom-error-message', errors.customAddress),
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]),
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h('div', {
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className: classnames('add-token__add-custom-field', {
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'add-token__add-custom-field--error': errors.customSymbol,
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}),
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}, [
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h('div.add-token__add-custom-label', 'Token Symbol'),
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h('input.add-token__add-custom-input', {
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type: 'text',
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value: customSymbol,
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disabled: true,
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}),
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h('div.add-token__add-custom-error-message', errors.customSymbol),
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]),
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h('div', {
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className: classnames('add-token__add-custom-field', {
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'add-token__add-custom-field--error': errors.customDecimals,
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}),
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}, [
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h('div.add-token__add-custom-label', 'Decimals of Precision'),
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h('input.add-token__add-custom-input', {
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type: 'number',
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value: customDecimals,
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disabled: true,
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}),
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h('div.add-token__add-custom-error-message', errors.customDecimals),
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]),
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])
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)
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}
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AddTokenScreen.prototype.renderTokenList = function () {
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const { searchQuery = '', selectedTokens } = this.state
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const results = searchQuery
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? fuse.search(searchQuery) || []
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: contractList
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return Array(6).fill(undefined)
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.map((_, i) => {
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const { logo, symbol, name, address } = results[i] || {}
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return Boolean(logo || symbol || name) && (
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h('div.add-token__token-wrapper', {
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className: classnames('add-token__token-wrapper', {
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'add-token__token-wrapper--selected': selectedTokens[address],
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}),
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onClick: () => this.toggleToken(address, results[i]),
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}, [
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h('div.add-token__token-icon', {
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style: {
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backgroundImage: `url(images/contract/${logo})`,
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},
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}),
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h('div.add-token__token-data', [
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h('div.add-token__token-symbol', symbol),
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h('div.add-token__token-name', name),
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]),
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])
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)
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})
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}
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AddTokenScreen.prototype.renderConfirmation = function () {
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const {
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customAddress: address,
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customSymbol: symbol,
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customDecimals: decimals,
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selectedTokens,
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} = this.state
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const { addTokens, goHome } = this.props
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const customToken = {
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address,
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symbol,
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decimals,
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}
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const tokens = address && symbol && decimals
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? { ...selectedTokens, [address]: customToken }
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: selectedTokens
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return (
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h('div.add-token', [
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h('div.add-token__wrapper', [
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h('div.add-token__title-container.add-token__confirmation-title', [
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h('div.add-token__title', 'Add Token'),
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h('div.add-token__description', 'Would you like to add these tokens?'),
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]),
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h('div.add-token__content-container.add-token__confirmation-content', [
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h('div.add-token__description.add-token__confirmation-description', 'Your balances'),
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h('div.add-token__confirmation-token-list',
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Object.entries(tokens)
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.map(([ address, token ]) => (
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h('span.add-token__confirmation-token-list-item', [
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h(Identicon, {
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className: 'add-token__confirmation-token-icon',
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diameter: 75,
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address,
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}),
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h(TokenBalance, { token }),
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])
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))
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),
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]),
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]),
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h('div.add-token__buttons', [
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h('button.btn-secondary', {
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onClick: () => addTokens(tokens).then(goHome),
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}, 'Add Tokens'),
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h('button.btn-tertiary', {
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onClick: () => this.setState({ isShowingConfirmation: false }),
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}, 'Back'),
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]),
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])
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)
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}
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AddTokenScreen.prototype.render = function () {
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const { isCollapsed, errors, isShowingConfirmation } = this.state
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const { goHome } = this.props
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return isShowingConfirmation
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? this.renderConfirmation()
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: (
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h('div.add-token', [
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h('div.add-token__wrapper', [
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h('div.add-token__title-container', [
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h('div.add-token__title', 'Add Token'),
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h('div.add-token__description', 'Keep track of the tokens you’ve bought with your MetaMask account. If you bought tokens using a different account, those tokens will not appear here.'),
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h('div.add-token__description', 'Search for tokens or select from our list of popular tokens.'),
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]),
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h('div.add-token__content-container', [
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h('div.add-token__input-container', [
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h('input.add-token__input', {
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type: 'text',
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placeholder: 'Search',
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onChange: e => this.setState({ searchQuery: e.target.value }),
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}),
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h('div.add-token__search-input-error-message', errors.tokenSelector),
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]),
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h(
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'div.add-token__token-icons-container',
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this.renderTokenList(),
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),
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]),
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h('div.add-token__footers', [
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h('div.add-token__add-custom', {
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onClick: () => this.setState({ isCollapsed: !isCollapsed }),
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}, 'Add custom token'),
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this.renderCustomForm(),
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]),
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]),
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h('div.add-token__buttons', [
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h('button.btn-secondary', {
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onClick: this.onNext,
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}, 'Next'),
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h('button.btn-tertiary', {
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onClick: goHome,
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}, 'Cancel'),
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]),
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])
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)
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}
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