Paystack.php

<?php
/**
 * Paystack payment service.
 */

namespace App\Payments;


use GuzzleHttp\Client;
use Illuminate\Support\Facades\Log;

class Paystack implements PaymentService
{

    /**
    * @var $client
    */
    protected $client;

  
    /**
    * @var $secretKey
    */
    protected $secretKey;


    public function __construct(Client $client)
    {
        $this->client = $client;
        $this->secretKey = config('paystack.secretKey');
    }


    /**
     * Verifies a transaction
     * @param array $paymentData
     * @return bool|mixed
     * @throws \Exception
     */
    public function verify(array $paymentData)
    {
        //The parameter after verify/ is the transaction reference to be verified
        $verificationUrl = "https://api.paystack.co/transaction/verify/" . @$paymentData['reference'];

        $response = $this->client->get($verificationUrl, [
            'headers' => [
                'Authorization' => "Bearer $this->secretKey"
            ]
        ]);

        $decodedResponse = json_decode($response->getBody()->getContents(), true);


        Log::channel('payments')->info($decodedResponse);


        if (array_key_exists('data', $decodedResponse)
            && array_key_exists('status', $decodedResponse['data']) &&
            ($decodedResponse['data']['status'] === 'success')) {

            return $decodedResponse['data'];
        }

        throw new \Exception("Payment failed");
    }
}