MyCrypto/common/components/CurrentCustomMessage.tsx

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import React, { PureComponent } from 'react';
import { connect } from 'react-redux';
import { AppState } from 'reducers';
import { getCurrentTo, ICurrentTo } from 'selectors/transaction';
import { getAllTokens } from 'selectors/config';
import { getWalletInst } from 'selectors/wallet';
import { getAddressMessage } from 'config';
import { Address } from 'components/ui';
import { Token } from 'types/network';
interface ReduxProps {
currentTo: ICurrentTo;
tokens: Token[];
wallet: AppState['wallet']['inst'];
}
type Props = ReduxProps;
interface State {
walletAddress: string | null;
}
class CurrentCustomMessageClass extends PureComponent<Props, State> {
public state: State = {
walletAddress: null
};
public async componentDidMount() {
this.setAddressState(this.props);
}
public UNSAFE_componentWillReceiveProps(nextProps: Props) {
if (this.props.wallet !== nextProps.wallet) {
this.setAddressState(nextProps);
}
}
public render() {
const message = this.getMessage();
if (message) {
return (
<div className="clearfix form-group">
<div className={`alert alert-${message.severity} col-xs-12`}>{message.message}</div>
</div>
);
} else {
return null;
}
}
private setAddressState(props: Props) {
if (props.wallet) {
const walletAddress = props.wallet.getAddressString();
this.setState({ walletAddress });
} else {
this.setState({ walletAddress: '' });
}
}
private getMessage() {
const { currentTo, tokens } = this.props;
const { walletAddress } = this.state;
// Make sure all comparisons are lower-cased.
const address = currentTo.raw.toLowerCase();
let message;
let severity;
// First check against our hard-coded messages
const msg = getAddressMessage(address);
if (msg) {
message = (
<React.Fragment>
<p>
<small>
A message regarding{' '}
<strong>
<Address address={address} />
</strong>:
</small>
</p>
<p>{msg.msg}</p>
</React.Fragment>
);
severity = msg.severity || 'info';
}
// Otherwise check if any of our tokens match the address
if (!message) {
const token = tokens.find(tk => tk.address.toLowerCase() === address);
if (token) {
message = `
Youre currently sending to the ${token.symbol} contract. If you
wanted to send ${token.symbol} to an address, change the To Address to
where you want it to go, make sure you have a positive ${token.symbol}
balance in your wallet, and select it from the dropdown next to the
Amount field.
`;
severity = 'warning';
}
}
// Finally check if they're sending to themselves (lol)
if (walletAddress === address) {
message = 'Youre sending to yourself. Are you sure you want to do that?';
severity = 'warning';
}
if (message) {
return {
message,
severity
};
}
}
}
export const CurrentCustomMessage = connect((state: AppState): ReduxProps => ({
currentTo: getCurrentTo(state),
tokens: getAllTokens(state),
wallet: getWalletInst(state)
}))(CurrentCustomMessageClass);