$accountConfig = new \Nikapps\BazaarApiPhp\Configs\AccountConfig();

$accountConfig->setClientId('your_client_id')
              ->setClientSecret('your_client_secret')
              ->setRefreshToken('your_refresh_token');

//for getting refresh-token
$accountConfig->setCode('your_returned_code')
              ->setRedirectUri('your_redirect_uri');

$bazaarApi = new \Nikapps\BazaarApiPhp\BazaarApi($accountConfig);

$authorizationRequest = new \Nikapps\BazaarApiPhp\Models\Requests\AuthorizationRequest();

$fetchRefreshToken = $bazaarApi->fetchRefreshToken($authorizationRequest);

//echo refresh token
echo $fetchRefreshToken->getRefreshToken();

//creating token manager based on file
$tokenManager = new \Nikapps\BazaarApiPhp\TokenManagers\FileTokenManager();
$tokenManager->setPath('/path/to/stored/token.json');

$bazaarApi = new \Nikapps\BazaarApiPhp\BazaarApi($accountConfig);
$bazaarApi->setTokenManager($tokenManager);

//creating purchase request model
$purchaseRequest = new \Nikapps\BazaarApiPhp\Models\Requests\PurchaseStatusRequest();
$purchaseRequest->setPackage('com.package.name');
$purchaseRequest->setProductId('product_id');
$purchaseRequest->setPurchaseToken('purchase_token');

//get purchase status
$purchase = $bazaarApi->getPurchase($purchaseRequest);

echo "Developer Payload: " . $purchase->getDeveloperPayload();
echo "PurchaseTime: " . $purchase->getPurchaseTime(); //instance of Carbon
echo "Consumption State: " . $purchase->getConsumptionState();
echo "Purchase State: " . $purchase->getPurchaseState();

//creating token manager based on file
$tokenManager = new \Nikapps\BazaarApiPhp\TokenManagers\FileTokenManager();
$tokenManager->setPath('/path/to/stored/token.json');

$bazaarApi = new \Nikapps\BazaarApiPhp\BazaarApi($accountConfig);
$bazaarApi->setTokenManager($tokenManager);

//creating subscription request model
$subscriptionRequest = new \Nikapps\BazaarApiPhp\Models\Requests\SubscriptionStatusRequest();
$subscriptionRequest->setPackage('com.package.name');
$subscriptionRequest->setSubscriptionId('subscription_id');
$subscriptionRequest->setPurchaseToken('purchase_token');

//get subscription status
$subscription = $bazaarApi->getSubscription($subscriptionRequest);

echo "Initiation Time: " . $subscription->getInitiationTime(); // instance of Carbon
echo "Expiration Time: " . $subscription->getExpirationTime(); // instance of Carbon
echo "Auto Renewing: " . $subscription->isAutoRenewing(); // boolean

//creating token manager based on file
$tokenManager = new \Nikapps\BazaarApiPhp\TokenManagers\FileTokenManager();
$tokenManager->setPath('/path/to/stored/token.json');

$bazaarApi = new \Nikapps\BazaarApiPhp\BazaarApi($accountConfig);
$bazaarApi->setTokenManager($tokenManager);

//creating cancel subscription request model
$cancelSubscriptionRequest = new \Nikapps\BazaarApiPhp\Models\Requests\CancelSubscriptionRequest();
$cancelSubscriptionRequest->setPackage('com.package.name');
$cancelSubscriptionRequest->setSubscriptionId('subscription_id');
$cancelSubscriptionRequest->setPurchaseToken('purchase_token');

//cancel subscription
$cancelSubscription = $bazaarApi->cancelSubscription($cancelSubscriptionRequest);

echo "Is Cancelled: " . $cancelSubscription->isCancelled();

$bazaarApi = new \Nikapps\BazaarApiPhp\BazaarApi($accountConfig);

$refreshTokenRequest = new \Nikapps\BazaarApiPhp\Models\Requests\RefreshTokenRequest();
$refreshToken = $bazaarApi->refreshToken($refreshTokenRequest);

echo "Access Token: " . $refreshToken->getAccessToken();

class CustomTokenManager implements \Nikapps\BazaarApiPhp\TokenManagers\TokenManagerInterface{

    /**
     * when access token is received from CafeBazaar, this method will be called.
     *
     * @param string $accessToken access-token
     * @param int $ttl number of seconds remaining until the token expires
     * @return mixed
     */
    public function storeToken($accessToken, $ttl) {
        // TODO: Implement storeToken() method.
    }

    /**
     * when access token is needed, this method will be called.
     *
     * @return string
     */
    public function loadToken() {
        // TODO: Implement loadToken() method.
    }

    /**
     * should we refresh token? (based on ttl)
     *
     * @return bool
     */
    public function isTokenExpired() {
        // TODO: Implement isTokenExpired() method.
    }

}

$bazaarApi = new \Nikapps\BazaarApiPhp\BazaarApi($accountConfig);

$customTokenManager = new CustomTokenManager();
$bazaarApi->setTokenManager($customTokenManager);

<?php
use Nikapps\BazaarApiPhp\BazaarApi;
use Nikapps\BazaarApiPhp\Configs\AccountConfig;
use Nikapps\BazaarApiPhp\Exceptions\NotFoundException;
use Nikapps\BazaarApiPhp\Models\Requests\PurchaseStatusRequest;
use Nikapps\BazaarApiPhp\Models\Responses\Purchase;
use Nikapps\BazaarApiPhp\TokenManagers\FileTokenManager;

//load composer autoloader
require_once __DIR__ . '/vendor/autoload.php';


//set account config
$accountConfig = new AccountConfig();

$accountConfig->setClientId('your_client_id')
    ->setClientSecret('your_client_secret')
    ->setRefreshToken('your_refresh_token');

//set file token manager
$fileTokenManager = new FileTokenManager();
$fileTokenManager->setPath(__DIR__ . '/somewhere/safe/token.json');

//initializing BazaarApi
$bazaarApi = new BazaarApi();
$bazaarApi->setAccountConfig($accountConfig);
$bazaarApi->setTokenManager($fileTokenManager);

//creating a purchase status request
$purchaseStatusRequest = new PurchaseStatusRequest();
$purchaseStatusRequest->setPackage('com.package.name')
    ->setProductId('product_id')
    ->setPurchaseToken('purchase_token');

//REQUESTING:
try {
    //get purchase status from cafe bazaar
    $purchase = $bazaarApi->getPurchase($purchaseStatusRequest);

    if ($purchase->getConsumptionState() == Purchase::CONSUMPTION_STATUS_CONSUMED) {
        // purchase is consumed
    }

    if ($purchase->getPurchaseState() == Purchase::PURCHASE_STATUS_PURCHASED) {
        // purchased
    }

    echo "Purchase Time: " . $purchase->getPurchaseTime();

} catch (NotFoundException $e) {
    // purchase is not found!

} catch (Exception $e) {

    /*
     * Other exceptions:
     *
     * @throws Exceptions\ExpiredAccessTokenException
     * @throws Exceptions\InvalidPackageNameException
     * @throws Exceptions\InvalidTokenException
     * @throws Exceptions\NetworkErrorException
     * @throws Exceptions\InvalidJsonException
     */

}