108 lines
3.3 KiB
JavaScript
108 lines
3.3 KiB
JavaScript
import React, { Fragment, PureComponent } from 'react';
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import { Tooltip, OverlayTrigger } from 'react-bootstrap';
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import web3 from "Embark/web3"
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import Toggle from 'react-toggle';
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import { BigNumber } from './utils'
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import "react-toggle/style.css";
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// We set an allowance to be "unlimited" by setting it to
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// it's maximum possible value -- namely, 2^256 - 1.
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const unlimitedAllowance = new BigNumber(2).pow(256).sub(1);
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const getDefaultAccount = () => web3.eth.defaultAccount;
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const SUPPORTED_TOKENS = ['SNT'];
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const commaize = (str) => Number(str).toLocaleString();
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const balanceTooltip = (balance, approved) => (
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<Tooltip id="balanceTooltip">
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{`Your balance of ${commaize(balance)} is ${approved ? 'approved' : 'not approved'} for spending by the contract`}
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</Tooltip>
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);
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class TokenHandle extends PureComponent {
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constructor(props){
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super(props);
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this.state = { balance: 0, approved: 0 };
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}
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componentDidMount() {
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setTimeout(() => {
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this.getBalance();
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this.getAllowance();
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}, 1000)
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}
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getBalance = () => {
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this.props.methods.balanceOf(getDefaultAccount())
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.call()
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.then(balance => { this.setState({ ...this.state, balance }) });
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}
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getAllowance = () => {
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const { methods, spender } = this.props;
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methods.allowance(getDefaultAccount(), spender)
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.call()
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.then(approved => {
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this.setState({ ...this.state, approved })
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})
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}
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toggleApproved = () => {
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const { approved } = this.state;
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const { methods: { approve }, spender } = this.props;
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const isApproved = !!Number(approved);
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let amountToApprove = isApproved ? 0 : unlimitedAllowance;
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console.log("approve(\""+spender+"\",\"" +amountToApprove +"\")")
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approve(
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spender,
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amountToApprove
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)
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.send()
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.then(approval => {
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const { events: { Approval: { returnValues: { _value, _amount } } } } = approval
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console.log('value',_value, approval)
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this.setState({ ...this.state, approved: _value || _amount })
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}).catch(err => {
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console.log("Approve failed: " + err);
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})
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}
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render() {
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const { symbol } = this.props;
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const { balance, approved } = this.state;
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const balanceTooltip = (
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<Tooltip id="balanceTooltip">
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{`Your balance of ${commaize(balance)} is ${approved ? 'approved' : 'not approved'} for spending by the contract`}
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</Tooltip>
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);
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return (
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<OverlayTrigger placement="top" overlay={balanceTooltip}>
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<div style={{ display: 'flex' }}>
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<Toggle
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checked={!!Number(approved)}
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name={symbol}
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onChange={this.toggleApproved} />
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<label style={{ margin: '2px 0px 0px 10px', fontWeight: 400 }}>{`${Number(balance).toLocaleString()} ${symbol.toUpperCase()}`}</label>
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</div>
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</OverlayTrigger>
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)
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}
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}
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const tooltip = (
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<Tooltip id="tooltip">
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Turn on permissions for a token to enable its use with the ENS subdomain registry.
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</Tooltip>
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);
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const TokenPermissions = (props) => (
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<Fragment>
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<OverlayTrigger placement="right" overlay={tooltip}>
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<h3>Token Permissions</h3>
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</OverlayTrigger>
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<hr/>
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<TokenHandle {...props} />
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</Fragment>
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)
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export default TokenPermissions;
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