Ashish Mishra

/**
 * Force WooCommerce PayPal Payments to charge only partial/deposit amount.
 */

add_filter(
    'woocommerce_paypal_payments_simulate_cart_enabled',
    '__return_false',
    999
);

/**
 * Disable PayPal item breakdown so custom amount does not mismatch.
 */
add_filter(
    'ppcp_ditch_items_breakdown',
    '__return_true',
    999
);

/**
 * Get deposit amount from partial payment plugin session.
 */
function nygold_get_paypal_partial_amount() {

    if ( ! function_exists( 'WC' ) || ! WC()->session ) {
        return false;
    }

    $partial_selected = WC()->session->get( 'pi_partial_payment' );

    if ( empty( $partial_selected ) ) {
        return false;
    }

    $advance_amount = WC()->session->get( 'pi_advance_amount' );

    if ( empty( $advance_amount ) || (float) $advance_amount <= 0 ) {
        return false;
    }

    return number_format(
        (float) $advance_amount,
        2,
        '.',
        ''
    );
}

/**
 * Override PayPal create order amount.
 */
add_filter( 'ppcp_create_order_request_body_data', function( $data ) {

    $partial_amount = nygold_get_paypal_partial_amount();

    if ( ! $partial_amount ) {
        return $data;
    }

    if ( isset( $data['purchase_units'][0]['amount'] ) ) {

        $currency = $data['purchase_units'][0]['amount']['currency_code'] ?? get_woocommerce_currency();

        $data['purchase_units'][0]['amount'] = array(
            'currency_code' => $currency,
            'value'         => $partial_amount,
        );
    }

    if ( isset( $data['purchase_units'][0]['items'] ) ) {
        unset( $data['purchase_units'][0]['items'] );
    }

    return $data;

}, 999 );

/**
 * Override PayPal patched amount too.
 * PayPal may patch totals after create order.
 */
add_filter( 'ppcp_patch_order_request_body_data', function( $patches ) {

    $partial_amount = nygold_get_paypal_partial_amount();

    if ( ! $partial_amount ) {
        return $patches;
    }

    foreach ( $patches as $key => $patch ) {

        if ( isset( $patch['value']['amount'] ) ) {

            $currency = $patch['value']['amount']['currency_code'] ?? get_woocommerce_currency();

            $patches[ $key ]['value']['amount'] = array(
                'currency_code' => $currency,
                'value'         => $partial_amount,
            );
        }

        if ( isset( $patch['value']['items'] ) ) {
            unset( $patches[ $key ]['value']['items'] );
        }
    }

    return $patches;

}, 999 );

This fixes the issue

https://ww.wp.xz.cn/plugins/woocommerce-paypal-payments/

Please ensure that your UPS User ID, Password, Access Key, and Account Number are correctly entered in the plugin settings. If these are correct, the disconnection could be due to a temporary server issue or a restriction on your UPS account.

I am not able to find the place where to add these details.

https://prnt.sc/4ouNv9FnahP5

In above screenshot i can only see authorize button when i click on it i enter the credentails and after successful login it redirects me back to the woocommerce settings page in url it says success as status but when i go back and check it says authentication error.