1)  File name : cartflows-pro\classes\class-cartflows-pro-frontend.php
    Line Number : 377
    Details : Ignore Gateways checkout processed for upsell
        old code : if ( 'ppec_paypal' === $order_gateway ) {
        New code : if ( 'ppec_paypal' === $order_gateway || 'paypal_express' === $order_gateway) {


2)  File name : cartflows-pro\classes\class-cartflows-pro-gateways.php
    Line number : 50
    Details : Add new action for Angelleye Express checkout token

        add_action( 'wp_ajax_nopriv_cartflows_front_create_paypal_express_angelleye_checkout_token', array( $this, 'generate_angelleye_express_checkout_token' ), 10 );
        ad_action( 'wp_ajax_cartflows_front_create_paypal_express_angelleye_checkout_token', array( $this, 'generate_angelleye_express_checkout_token' ), 10 );


3)  File name : cartflows-pro\classes\class-cartflows-pro-gateways.php
    Line number : 62
    Details : Add new action/filter for Handles angelleye paypal_express API call.

        /**
         * Angelleye Paypal Express API calls response and process billing agreement creation
         */
        add_action( 'woocommerce_api_cartflows_paypal_express', array( $this, 'maybe_handle_paypal_express_api_call' ) );

        /**
         * Angelleye Disable Skip Final Review
         */
        add_filter( 'angelleye_ec_force_to_display_checkout_page', array($this, 'angelleye_express_checkout_cartflow'));
        add_filter( 'angelleye_paypal_payflow_allow_default_order_status', '__return_false');



4)  File name : cartflows-pro\classes\class-cartflows-pro-gateways.php
    Line number : 144
    Details : Add new function for Generates angelleye express checkout token.

        /**
         * Generates angelleye express checkout token
         */
        function generate_angelleye_express_checkout_token() {
            $this->load_gateway( 'paypal_express' )->generate_express_checkout_token();
        }


5)  File name : cartflows-pro\classes\class-cartflows-pro-gateways.php
    Line number : 175
    Details : modify existing array in get_supported_gateways function for Gateways Supported.

        'paypal_express' => array(
                'file'  => 'paypal-express-angelleye.php',
                'class' => 'Cartflows_Pro_Gateway_Paypal_Express_Angelleye',
        ),
                    'paypal_pro' => array(
            'file'  => 'paypal-pro-angelleye.php',
            'class' => 'Cartflows_Pro_Gateway_PayPal_Pro_AngellEYE',
        ),
                    'paypal_pro_payflow' => array(
            'file'  => 'paypal-pro-payflow-angelleye.php',
            'class' => 'Cartflows_Pro_Gateway_PayPal_Pro_PayFlow_AngellEYE',
        ),
                    'braintree' => array(
            'file'  => 'braintree-angelleye.php',
            'class' => 'Cartflows_Pro_Gateway_Braintree_AngellEYE',
        )


6)  File name : cartflows-pro\classes\class-cartflows-pro-gateways.php
    Line number : 217
    Details : Add new function for Handles angelleye paypal_express API call.

        /**
         * Handles angelleye paypal_express API call
         */
        function maybe_handle_paypal_express_api_call() {
            $this->load_gateway( 'paypal_express' )->create_billing_agreement();
            $this->load_gateway( 'paypal_express' )->process_api_calls();
        }



7)  File name : cartflows-pro\classes\class-cartflows-pro-gateways.php
    Line number : 217
    Details : Add new function for Handles angelleye Display checkout page or not.

        function angelleye_express_checkout_cartflow($bool) {
            $post_data = WC()->session->get('post_data');
            if(!empty($post_data)) {
                if( !empty($post_data['_wcf_flow_id'] ) ) {
                    $order_bump         = get_post_meta( $post_data['_wcf_checkout_id'], 'wcf-pre-checkout-offer', true );
                    if ( 'yes' == $order_bump ) {
                        return true;
                    } else {
                        return false;
                    }

                }
            }
            return $bool;
        }


8)  Add new php file : cartflows-pro\modules\gateways\class-cartflows-pro-gateway-braintree-angelleye.php
9)  Add new php file : cartflows-pro\modules\gateways\class-cartflows-pro-gateway-paypal-express-angelleye.php
10)  Add new php file : cartflows-pro\modules\gateways\class-cartflows-pro-gateway-paypal-pro-angelleye.php
11)  Add new php file : cartflows-pro\modules\gateways\class-cartflows-pro-gateway-paypal-pro-payflow-angelleye.php

12)  File name : cartflows-pro\modules\offer\classes\class-cartflows-pro-base-offer-markup.php
     Line Number : 92
     Details : Offer script, skip offer when reference transaction disable, same as PayPal and express.
        old code : if ( ( 'paypal' === $payment_method || 'ppec_paypal' === $payment_method ) && ! wcf_pro()->utils->is_reference_transaction() && ! wcf_pro()->utils->is_zero_value_offered_product() ) {
        New code : if ( ( 'paypal' === $payment_method || 'ppec_paypal' === $payment_method || 'paypal_express' === $payment_method) && ! wcf_pro()->utils->is_reference_transaction() && ! wcf_pro()->utils->is_zero_value_offered_product() ) {


13)  File name : cartflows-pro\modules\offer\classes\class-cartflows-pro-base-offer-shortcodes.php
     Line Number : 105
     Details : add angelleye paypal_express compatibility for Offer shortcode markup same as PayPal and express.
        old code : if ( ( 'paypal' === $payment_method || 'ppec_paypal' === $payment_method ) && ! wcf_pro()->utils->is_reference_transaction() ) {
        New code : if ( ( 'paypal' === $payment_method || 'ppec_paypal' === $payment_method || 'paypal_express' === $payment_method) && ! wcf_pro()->utils->is_reference_transaction() ) {


14)  File name : cartflows-pro\modules\offer\classes\class-cartflows-pro-base-offer-shortcodes.php
     Line Number : 219
     Details : Offer shortcode markup, add angelleye paypal_express compatibility for Offer shortcode markup same as PayPal and express.
        old code : if ( ( 'paypal' === $payment_method || 'ppec_paypal' === $payment_method ) && ! wcf_pro()->utils->is_reference_transaction() ) {
        New code : if ( ( 'paypal' === $payment_method || 'ppec_paypal' === $payment_method || 'paypal_express' === $payment_method ) && ! wcf_pro()->utils->is_reference_transaction() ) {