woocommerce-paypal-payments/modules/ppcp-blocks/resources/js/card-fields-config.js

export async function createOrder() {
    const config = wc.wcSettings.getSetting('ppcp-credit-card-gateway_data');

    return fetch(config.scriptData.ajax.create_order.endpoint, {
        method: "POST",
        headers: {
            "Content-Type": "application/json",
        },
        body: JSON.stringify({
            nonce: config.scriptData.ajax.create_order.nonce,
            context: config.scriptData.context,
            payment_method: 'ppcp-credit-card-gateway',
            save_payment_method: localStorage.getItem('ppcp-save-card-payment') === 'true',
        }),
    })
        .then((response) => response.json())
        .then((order) => {
            return order.data.id;
        })
        .catch((err) => {
            console.error(err);
        });
}

export async function onApprove(data) {
    const config = wc.wcSettings.getSetting('ppcp-credit-card-gateway_data');

    return fetch(config.scriptData.ajax.approve_order.endpoint, {
        method: "POST",
        headers: {
            "Content-Type": "application/json",
        },
        body: JSON.stringify({
            order_id: data.orderID,
            nonce: config.scriptData.ajax.approve_order.nonce,
        }),
    })
        .then((response) => response.json())
        .then((data) => {
            localStorage.removeItem('ppcp-save-card-payment');
        })
        .catch((err) => {
            console.error(err);
        });
}