woocommerce-paypal-payments/modules/ppcp-googlepay/resources/js/Helper/UpdatePaymentData.js

class UpdatePaymentData {

    constructor(config) {
        this.config = config;
    }

    update(paymentData) {
        return new Promise((resolve, reject) => {
            fetch(
                this.config.endpoint,
                {
                    method: 'POST',
                    headers: {
                        'Content-Type': 'application/json'
                    },
                    credentials: 'same-origin',
                    body: JSON.stringify({
                        nonce: this.config.nonce,
                        paymentData: paymentData,
                    })

                }
            )
                .then(result => result.json())
                .then(result => {
                    if (!result.success) {
                        return;
                    }

                    resolve(result.data);
                });
        });
    }

}

export default UpdatePaymentData;