woocommerce-paypal-payments/modules.local/ppcp-wc-gateway/extensions.php

<?php

declare(strict_types=1);

namespace Inpsyde\PayPalCommerce\WcGateway;

use Inpsyde\Woocommerce\Logging\Logger\NullLogger;
use Inpsyde\Woocommerce\Logging\Logger\WooCommerceLogger;
use Psr\Container\ContainerInterface;
use Psr\Log\LoggerInterface;

return [

    'api.merchant_email' => static function (ContainerInterface $container): string {
        $settings = $container->get('wcgateway.settings');
        return $settings->has('merchant_email') ? (string) $settings->get('merchant_email') : '';
    },
    'api.merchant_id' => static function (ContainerInterface $container): string {
        $settings = $container->get('wcgateway.settings');
        return $settings->has('merchant_id') ? (string) $settings->get('merchant_id') : '';
    },
    'api.partner_merchant_id' => static function (): string {
        // ToDo: Replace with the real merchant id of platform
        return 'KQ8FCM66JFGDL';
    },
    'api.key' => static function (ContainerInterface $container): string {
        $settings = $container->get('wcgateway.settings');
        $key = $settings->has('client_id') ? (string) $settings->get('client_id') : '';
        return $key;
    },
    'api.secret' => static function (ContainerInterface $container): string {
        $settings = $container->get('wcgateway.settings');
        return $settings->has('client_secret') ? (string) $settings->get('client_secret') : '';
    },
    'woocommerce.logger.woocommerce' => function (ContainerInterface $container): LoggerInterface {
        $settings = $container->get('wcgateway.settings');
        if (! $settings->has('logging_enabled') || ! $settings->get('logging_enabled')) {
            return new NullLogger();
        }

        $source = $container->get('woocommerce.logger.source');
        return new WooCommerceLogger(
            wc_get_logger(),
            $source
        );
    },
];