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