MyCrypto/common/containers/Tabs/SignAndVerifyMessage/components/VerifyMessage/index.tsx

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import React, { Component } from 'react';
import { connect } from 'react-redux';
import translate from 'translations';
import { showNotification, TShowNotification } from 'actions/notifications';
import { verifySignedMessage, ISignedMessage } from 'libs/signing';
import './index.scss';
import { TextArea } from 'components/ui';
interface Props {
showNotification: TShowNotification;
}
interface State {
signature: string;
verifiedAddress?: string;
verifiedMessage?: string;
}
const initialState: State = {
signature: ''
};
const signatureExample: ISignedMessage = {
address: '0x7cB57B5A97eAbe94205C07890BE4c1aD31E486A8',
msg: 'asdfasdfasdf',
sig: '0x4771d78f13ba...',
version: '2'
};
const signaturePlaceholder = JSON.stringify(signatureExample, null, 2);
export class VerifyMessage extends Component<Props, State> {
public state: State = initialState;
public render() {
const { verifiedAddress, verifiedMessage, signature } = this.state;
return (
<div>
<div className="Tab-content-pane">
<div className="input-group-wrapper ">
<label className="input-group">
<div className="input-group-header">{translate('MSG_signature')}</div>
<TextArea
className={`VerifyMessage-inputBox ${signature ? 'is-valid' : 'is-invalid'}`}
placeholder={signaturePlaceholder}
value={signature}
onChange={this.handleSignatureChange}
onPaste={this.handleSignaturePaste}
/>
</label>
</div>
<button
className="VerifyMessage-sign btn btn-primary btn-lg"
onClick={this.handleVerifySignedMessage}
disabled={false}
>
{translate('MSG_verify')}
</button>
{!!verifiedAddress &&
!!verifiedMessage && (
<div className="VerifyMessage-success alert alert-success">
<strong>{verifiedAddress}</strong> did sign the message{' '}
<strong>{verifiedMessage}</strong>.
</div>
)}
</div>
</div>
);
}
private clearVerifiedData = () =>
this.setState({
verifiedAddress: '',
verifiedMessage: ''
});
private handleVerifySignedMessage = () => {
try {
const parsedSignature: ISignedMessage = JSON.parse(this.state.signature);
if (!verifySignedMessage(parsedSignature)) {
throw Error();
}
const { address, msg } = parsedSignature;
this.setState({
verifiedAddress: address,
verifiedMessage: msg
});
this.props.showNotification('success', translate('SUCCESS_7'));
} catch (err) {
this.clearVerifiedData();
this.props.showNotification('danger', translate('ERROR_12'));
}
};
private handleSignatureChange = (e: React.FormEvent<HTMLTextAreaElement>) => {
const signature = e.currentTarget.value;
this.setState({ signature });
};
private handleSignaturePaste = (e: React.ClipboardEvent<HTMLTextAreaElement>) => {
const text = e.clipboardData.getData('Text');
if (text) {
try {
const signature = JSON.stringify(JSON.parse(text), null, 2);
this.setState({ signature });
e.preventDefault();
} catch (err) {
// Do nothing, it wasn't json they pasted
}
}
};
}
export default connect(null, {
showNotification
})(VerifyMessage);