MyCrypto/common/containers/Tabs/BroadcastTx/index.tsx

import React, { Component } from 'react';
import { connect } from 'react-redux';
import { AppState } from 'reducers';
import TabSection from 'containers/TabSection';
import { translateRaw } from 'translations';
import { broadcastTx as dBroadcastTx, TBroadcastTx } from 'actions/wallet';
import { QRCode } from 'components/ui';
import './index.scss';
import {
  BroadcastTransactionStatus,
  getTransactionFields
} from 'libs/transaction';
import EthTx from 'ethereumjs-tx';
import { ConfirmationModal } from 'containers/Tabs/SendTransaction/components';
import classnames from 'classnames';

interface Props {
  broadcastTx: TBroadcastTx;
  transactions: BroadcastTransactionStatus[];
}

interface State {
  signedTx: string;
  showConfirmationModal: boolean;
  disabled: boolean;
}

const initialState: State = {
  showConfirmationModal: false,
  signedTx: '',
  disabled: true
};

class BroadcastTx extends Component<Props, State> {
  public state = initialState;

  public ensureValidSignedTxInputOnUpdate() {
    try {
      const tx = new EthTx(this.state.signedTx);
      getTransactionFields(tx);
      if (this.state.disabled) {
        this.setState({ disabled: false });
      }
    } catch (e) {
      if (!this.state.disabled) {
        this.setState({ disabled: true });
      }
    }
  }

  public componentDidUpdate() {
    this.ensureValidSignedTxInputOnUpdate();
  }

  public render() {
    const { signedTx, disabled, showConfirmationModal } = this.state;

    const inputClasses = classnames({
      'form-control': true,
      'is-valid': !disabled,
      'is-invalid': disabled
    });

    return (
      <TabSection>
        <div className="Tab-content-pane row block text-center">
          <div className="col-md-6">
            <div className="col-md-12 BroadcastTx-title">
              <h2>Broadcast Signed Transaction</h2>
            </div>
            <p>
              Paste a signed transaction and press the "SEND TRANSACTION"
              button.
            </p>
            <label>{translateRaw('SEND_signed')}</label>
            <textarea
              className={inputClasses}
              rows={7}
              value={signedTx}
              onChange={this.handleChange}
            />
            <button
              className="btn btn-primary"
              disabled={disabled || signedTx === ''}
              onClick={this.handleBroadcastTx}
            >
              {translateRaw('SEND_trans')}
            </button>
          </div>

          <div className="col-md-6" style={{ marginTop: '70px' }}>
            <div
              className="qr-code text-center"
              style={{
                maxWidth: '15rem',
                margin: '1rem auto',
                width: '100%'
              }}
            >
              {signedTx && <QRCode data={signedTx} />}
            </div>
          </div>
        </div>
        {showConfirmationModal && (
          <ConfirmationModal
            signedTx={signedTx}
            onClose={this.handleClose}
            onConfirm={this.handleConfirm}
          />
        )}
      </TabSection>
    );
  }

  public handleClose = () => {
    this.setState({ showConfirmationModal: false });
  };

  public handleBroadcastTx = () => {
    this.setState({ showConfirmationModal: true });
  };

  public handleConfirm = () => {
    this.props.broadcastTx(this.state.signedTx);
  };

  protected handleChange = event => {
    this.setState({ signedTx: event.target.value });
  };
}

function mapStateToProps(state: AppState) {
  return {
    transactions: state.wallet.transactions
  };
}

export default connect(mapStateToProps, { broadcastTx: dBroadcastTx })(
  BroadcastTx
);