visual-identity/app/components/erc20token.js

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JavaScript
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2018-05-13 04:31:01 +00:00
import EmbarkJS from 'Embark/EmbarkJS';
import ERC20Token from 'Embark/contracts/ERC20Token';
import React from 'react';
import { Form, FormGroup, FormControl, HelpBlock, Button } from 'react-bootstrap';
class ERC20TokenUI extends React.Component {
constructor(props) {
super(props);
this.state = {
balanceOf: 0,
transferTo: "",
transferAmount: 0,
logs: []
}
}
contractAddress(e){
e.preventDefault();
var tokenAddress = e.target.value;
ERC20Token.options.address = tokenAddress;
}
update_transferTo(e){
this.setState({transferTo: e.target.value});
}
update_transferAmount(e){
this.setState({transferAmount: e.target.value});
}
transfer(e){
var to = this.state.transferTo;
var amount = this.state.transferAmount;
var tx = ERC20Token.methods.transfer(to, amount).send({from: web3.eth.defaultAccount});
this._addToLog(ERC20Token.options.address+".transfer(" + to + ", "+amount+")");
}
approve(e){
var to = this.state.transferTo;
var amount = this.state.transferAmount;
var tx = ERC20Token.methods.approve(to, amount).send({from: web3.eth.defaultAccount});
this._addToLog(ERC20Token.options.address+".approve(" + to + ", "+amount+")");
}
balanceOf(e){
e.preventDefault();
var who = e.target.value;
if (EmbarkJS.isNewWeb3()) {
ERC20Token.methods.balanceOf(who).call()
.then(_value => this.setState({balanceOf: _value}))
} else {
ERC20Token.balanceOf(who)
.then(_value => this.x({balanceOf: _value}));
}
this._addToLog(ERC20Token.options.address+".balanceOf(" + who + ")");
}
_addToLog(txt){
this.state.logs.push(txt);
this.setState({logs: this.state.logs});
}
render(){
return (<React.Fragment>
<h2> Set token contract address</h2>
<Form inline>
<FormGroup>
<FormControl
type="text"
onChange={(e) => this.contractAddress(e)} />
</FormGroup>
</Form>
<h3> Read account token balance</h3>
<Form inline>
<FormGroup>
<label>
Of:
<FormControl
type="text"
defaultValue={this.state.accountB}
onChange={(e) => this.balanceOf(e)} />
</label>
<label>
<HelpBlock><span className="balanceOf">{this.state.balanceOf}</span></HelpBlock>
</label>
</FormGroup>
</Form>
<h3> Transfer/Approve token balance</h3>
<Form inline>
<FormGroup>
<label>
To:
<FormControl
type="text"
defaultValue={this.state.transferTo}
onChange={(e) => this.update_transferTo(e) } />
</label>
<label>
Amount:
<FormControl
type="text"
defaultValue={this.state.transferAmount}
onChange={(e) => this.update_transferAmount(e) } />
</label>
<Button bsStyle="primary" onClick={(e) => this.transfer(e)}>Transfer</Button>
<Button bsStyle="primary" onClick={(e) => this.approve(e)}>Approve</Button>
</FormGroup>
</Form>
<h3> Contract Calls </h3>
<p>Javascript calls being made: </p>
<div className="logs">
{
this.state.logs.map((item, i) => <p key={i}>{item}</p>)
}
</div>
</React.Fragment>
);
}
}
export default ERC20TokenUI;