Edit.js

...
class Edit extends Component {
...
  handleSubmit = (event) => {
    this.contracts.SimpleStorage.methods.set.cacheSend(this.state.newVal);
    event.preventDefault();
  }

  componentDidUpdate(prevProps) {
    const { onRedirectToHomeDone } = this.props;
    if (this.props.redirectToHome && this.props.redirectToHome !== prevProps.redirectToHome) {
      this.props.history.push('/');
      onRedirectToHomeDone();
    }
  }
...
  render() {
    const { onMetaMaskCheckDone, onTxErrorDone } = this.props;
    return (
      <div>
        <form onSubmit={this.handleSubmit}>
          <FormControl margin="normal" required fullWidth>
            <InputLabel htmlFor="contractDataInput">New Value:</InputLabel>
            <Input onChange={this.handleChange} id="contractDataInput" name="contractDataInput" autoFocus />
          </FormControl>
          <Button type="submit" variant="contained" color="primary">
            Set
          </Button>
        </form>
        <Dialog
          open={this.props.checkMetaMask}
          onClose={onMetaMaskCheckDone}
...
        >
          <DialogTitle id="alert-dialog-title">{"It's time to check your metamask extension"}
...
        </Dialog>
        <Snackbar
          anchorOrigin={{ 'vertical': 'bottom', 'horizontal': 'right'} }
          open={this.props.metaMaskReject}
          autoHideDuration={6000}
          onClose={onTxErrorDone}
...
          message={<span id="message-id">You rejected the TX</span>}
...
        />
      </div>
    );
  }
}
...
const mapStateToProps = state => {
  return {
    checkMetaMask: state.dappReducer.checkMetaMask,
    metaMaskReject: state.dappReducer.metaMaskReject,
    redirectToHome: state.dappReducer.redirectToHome
  }
}

const mapDispatchToProps = dispatch => {
  return {
    onMetaMaskCheckDone: () => dispatch({ type: "CHECK_METAMASK_DONE" }),
    onTxErrorDone: () => dispatch({ type: "TX_ERROR_METAMASK_DONE" }),
    onRedirectToHomeDone: () => dispatch({ type: "REDIRECT_TO_HOME_DONE"})
  };
};

export default drizzleConnect(Edit, mapStateToProps, mapDispatchToProps);