Secure payment with paypal

I am trying to implement a secure payment option with react-paypal-express-checkout... but I saw that user can easily change the amount with chrome dev tools ... shouldn't I make the API request to paypal from my server and validate the amount with my DB? I didn't saw any option to do that with paypal...

here is my code:

import React, { Component } from 'react';
import { connect } from 'react-redux';
import 'react-credit-cards/es/styles-compiled.css'
import './checkout.css';
import PaypalExpressBtn from 'react-paypal-express-checkout';

class CheckOut extends Component {
    constructor(props) {
        super(props);

        this.state = {
            amount: 40
        }
    }

    render() {
        const client = {
            sandbox: 'XXXX',
            production: 'Your-Production-Client-ID',
        }
        return (
                <PaypalExpressBtn client={client} currency={'USD'} total={this.state.amount} />
        );
    }
}


export default connect(CheckOut);

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