Patch for paypal partial payment

_paypal_partial_payment.php

add_filter('woocommerce_paypal_args', 'woocommerce_paypal_args_callback', 10, 2);

function woocommerce_paypal_args_callback($args, $order) {
    if (isset($args['shipping_1']) && get_post_meta($order->get_id(), '_via_wallet_payment', true)) {
        $_original_order_amount = get_post_meta($order->get_id(), '_original_order_amount', true);
        $_via_wallet_payment = get_post_meta($order->get_id(), '_via_wallet_payment', true);
        $via_paypal = $_original_order_amount - $_via_wallet_payment;
        if ($args['shipping_1'] > $via_paypal) {
            $args['shipping_1'] = $via_paypal;
            $item_name = _get_order_item_names($order);
            if (!isset($args['item_name_1'])) {
                $args['item_name_1'] = html_entity_decode(wc_trim_string($item_name ? $item_name : __('Item', 'woocommerce'), 127), ENT_NOQUOTES, 'UTF-8');
                $args['quantity_1'] = 1;
                $args['amount_1'] = 0;
                $args['item_number_1'] = '';
            }
        }
    }
    return $args;
}

function _get_order_item_names($order) {
    $item_names = array();

    foreach ($order->get_items() as $item) {
        $item_name = $item->get_name();
        $item_meta = strip_tags(wc_display_item_meta($item, array(
            'before' => "",
            'separator' => ", ",
            'after' => "",
            'echo' => false,
            'autop' => false,
        )));

        if ($item_meta) {
            $item_name .= ' (' . $item_meta . ')';
        }

        $item_names[] = $item_name . ' x ' . $item->get_quantity();
    }

    return implode(', ', $item_names);
}