diff --git a/.github/workflows/github_master.yml b/.github/workflows/github_master.yml
index 6dfb67e..e08c5bd 100644
--- a/.github/workflows/github_master.yml
+++ b/.github/workflows/github_master.yml
@@ -13,9 +13,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@v5
       with:
         python-version: '3.x'
 
diff --git a/.github/workflows/github_pull_request.yml b/.github/workflows/github_pull_request.yml
index f29c2ed..45fea81 100644
--- a/.github/workflows/github_pull_request.yml
+++ b/.github/workflows/github_pull_request.yml
@@ -14,12 +14,12 @@ jobs:
 
     strategy:
       matrix:
-        python-version: ['3.12', '3.13', '3.14']
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
diff --git a/iyzipay/__init__.py b/iyzipay/__init__.py
index 72a1583..ed315d6 100644
--- a/iyzipay/__init__.py
+++ b/iyzipay/__init__.py
@@ -21,6 +21,7 @@
     Payment,
     ThreedsInitialize,
     ThreedsPayment,
+    ThreedsV2Payment,
     Cancel,
     Refund,
     Card,
@@ -49,11 +50,19 @@
     BasicBkmInitialize,
     RetrievePaymentDetails,
     RetrieveTransactions,
+    ReportingScrollTransaction,
     IyziLinkProduct,
     IyziFileBase64Encoder,
-    RetrieveLoyalty)
+    RetrieveLoyalty,
+    PayWithIyzico,
+    SubscriptionProduct,
+    SubscriptionPricingPlan,
+    SubscriptionCheckoutForm,
+    Subscription,
+    SubscriptionCardUpdate,
+    SubscriptionCustomer
+)
 
 from iyzipay.pki_builder import (  # noqa
     PKIBuilder,
 )
-
diff --git a/iyzipay/iyzipay_resource.py b/iyzipay/iyzipay_resource.py
index 6cd4ce9..4788287 100644
--- a/iyzipay/iyzipay_resource.py
+++ b/iyzipay/iyzipay_resource.py
@@ -5,13 +5,15 @@
 import json
 import random
 import string
+from urllib.parse import urlencode
 
 import iyzipay
 
+
 class IyzipayResource:
     RANDOM_STRING_SIZE = 8
     header = {
-        "Accept": "application/json", 
+        "Accept": "application/json",
         "Content-type": "application/json",
         'x-iyzi-client-version': 'iyzipay-python-1.0.45'
     }
@@ -19,49 +21,45 @@ class IyzipayResource:
     def __init__(self):
         self.httplib = importlib.import_module('http.client')
 
-    def strip_zero(self, number):
-        has_zero = number.endswith('.0')
-        return number.replace('.0', '') if has_zero else number
-
-    def calculate_hmac_sha256_signature(self, params, secret_key):
-        secret_key = bytes(secret_key.encode('utf-8'))
-        msg = ':'.join(params).encode('utf-8')
-
-        hmac_obj = hmac.new(secret_key, digestmod=hashlib.sha256)
-        hmac_obj.update(msg)
-        return hmac_obj.hexdigest()
-
     def verify_signature(self, params, secret_key, signature):
         calculated_signature = self.calculate_hmac_sha256_signature(params, secret_key)
         verified = signature == calculated_signature
         print('Signature verified:', verified)
 
-    def connect(self, method, url, options, request_body_dict=None, pki=None):
+    def connect(self, method, url, options, request_body_dict=None):
         connection = self.httplib.HTTPSConnection(options['base_url'])
         body_str = json.dumps(request_body_dict)
-        header = self.get_http_header(url, options, body_str, pki)
+        header = self.get_http_header(url, options, body_str)
         connection.request(method, url, body_str, header)
         return connection.getresponse()
 
-    def get_http_header(self, url, options=None, body_str=None, pki_string=None):
+    def get_http_header(self, url, options=None, body_str=None):
         random_str = self.generate_random_string(self.RANDOM_STRING_SIZE)
         self.header.update({'x-iyzi-rnd': random_str})
-        self.get_http_header_v1(options, pki_string, random_str)
         return self.get_http_header_v2(url, options, random_str, body_str)
 
-    def get_http_header_v1(self, options, pki_string, random_str=None):
-        if pki_string is not None:
-            self.header.update(
-                {'Authorization_Fallback': self.prepare_auth_string(options, random_str, pki_string)})
-        return self.header
-
     def get_http_header_v2(self, url, options, random_str, body_str):
         url = url.split('?')[0]
         hashed_v2_str = self.generate_v2_hash(options['api_key'], url, options['secret_key'], random_str, body_str)
         self.header.update({'Authorization': 'IYZWSv2 %s' % hashed_v2_str})
         return self.header
 
-    def generate_v2_hash(self, api_key, url, secret_key, random_str, body_str):
+    @staticmethod
+    def strip_zero(number):
+        has_zero = number.endswith('.0')
+        return number.replace('.0', '') if has_zero else number
+
+    @staticmethod
+    def calculate_hmac_sha256_signature(params, secret_key):
+        secret_key = bytes(secret_key.encode('utf-8'))
+        msg = ':'.join(params).encode('utf-8')
+
+        hmac_obj = hmac.new(secret_key, digestmod=hashlib.sha256)
+        hmac_obj.update(msg)
+        return hmac_obj.hexdigest()
+
+    @staticmethod
+    def generate_v2_hash(api_key, url, secret_key, random_str, body_str):
         secret_key = bytes(secret_key.encode('utf-8'))
         msg = (random_str + url + body_str).encode('utf-8')
 
@@ -75,78 +73,16 @@ def generate_v2_hash(self, api_key, url, secret_key, random_str, body_str):
         ]
         return base64.b64encode('&'.join(authorization_params).encode()).decode()
 
-    def get_plain_http_header(self, options):
-        return self.get_http_header_v1(None, options)
-
-    def prepare_auth_string(self, options, random_str, pki_string):
-        hashed = self.generate_hash(options['api_key'], options['secret_key'], random_str, pki_string)
-        return self.format_header_string(options['api_key'], hashed)
-
-    def generate_random_string(self, size):
-        return "".join(
-                random.SystemRandom().choice(string.ascii_letters + string.digits) for _ in
-                range(size))
-
-    @staticmethod
-    def generate_hash(api_key, secret_key, random_string, pki_string):
-        hash_str = api_key + random_string + secret_key + pki_string
-        hex_dig = hashlib.sha1(hash_str.encode()).digest()
-
-        return base64.b64encode(hex_dig)
-
     @staticmethod
-    def format_header_string(api_key, hashed):
-        hashed = hashed.decode('utf-8')
-        return 'IYZWS %s:%s' % (api_key, hashed)
+    def generate_random_string(size):
+        return "".join(
+            random.SystemRandom().choice(string.ascii_letters + string.digits) for _ in
+            range(size))
 
     @staticmethod
     def resource_pki(request):
-        return 'locale=' + request.get('locale') + (',conversationId=' + request.get('conversationId') + ',' if request.get('conversationId') else ',')
-
-    @staticmethod
-    def buyer_pki(buyer):
-        pki_builder = iyzipay.PKIBuilder('')
-        pki_builder.append('id', buyer.get('id'))
-        pki_builder.append('name', buyer.get('name'))
-        pki_builder.append('surname', buyer.get('surname'))
-        pki_builder.append('identityNumber', buyer.get('identityNumber'))
-        pki_builder.append('email', buyer.get('email'))
-        pki_builder.append('gsmNumber', buyer.get('gsmNumber'))
-        pki_builder.append('registrationDate', buyer.get('registrationDate'))
-        pki_builder.append('lastLoginDate', buyer.get('lastLoginDate'))
-        pki_builder.append('registrationAddress', buyer.get('registrationAddress'))
-        pki_builder.append('city', buyer.get('city'))
-        pki_builder.append('country', buyer.get('country'))
-        pki_builder.append('zipCode', buyer.get('zipCode'))
-        pki_builder.append('ip', buyer.get('ip'))
-        return pki_builder.get_request_string()
-
-    @staticmethod
-    def address_pki(address):
-        pki_builder = iyzipay.PKIBuilder('')
-        pki_builder.append('address', address.get('address'))
-        pki_builder.append('zipCode', address.get('zipCode'))
-        pki_builder.append('contactName', address.get('contactName'))
-        pki_builder.append('city', address.get('city'))
-        pki_builder.append('country', address.get('country'))
-        return pki_builder.get_request_string()
-
-    @staticmethod
-    def basket_pki(basket_items):
-        basket_items_pki = []
-        for item in basket_items:
-            pki_builder = iyzipay.PKIBuilder('')
-            pki_builder.append('id', item.get('id'))
-            pki_builder.append_price('price', item.get('price'))
-            pki_builder.append('name', item.get('name'))
-            pki_builder.append('category1', item.get('category1'))
-            pki_builder.append('category2', item.get('category2'))
-            pki_builder.append('itemType', item.get('itemType'))
-            pki_builder.append('subMerchantKey', item.get('subMerchantKey'))
-            pki_builder.append_price('subMerchantPrice', item.get('subMerchantPrice'))
-            pki_builder.append_price('withholdingTax', item.get('withholdingTax'))
-            basket_items_pki.append(pki_builder.get_request_string())
-        return basket_items_pki
+        return 'locale=' + request.get('locale') + (
+            ',conversationId=' + request.get('conversationId') + ',' if request.get('conversationId') else ',')
 
     @staticmethod
     def payment_card_pki(payment_card):
@@ -162,43 +98,6 @@ def payment_card_pki(payment_card):
         pki_builder.append('cardUserKey', payment_card.get('cardUserKey'))
         return pki_builder.get_request_string()
 
-    @staticmethod
-    def installment_details_pki(installment_details):
-        installments_pki = []
-        for item in installment_details:
-            pki_builder = iyzipay.PKIBuilder('')
-            pki_builder.append('bankId', item.get('bankId'))
-            pki_builder.append_array('installmentPrices',
-                                     IyzipayResource.installment_prices_pki(item.get('installmentPrices')))
-            installments_pki.append(pki_builder.get_request_string())
-        return installments_pki
-
-    @staticmethod
-    def installment_prices_pki(installment_prices):
-        installments_pki = []
-        for item in installment_prices:
-            pki_builder = iyzipay.PKIBuilder('')
-            pki_builder.append('installmentNumber', item.get('installmentNumber'))
-            pki_builder.append_price('totalPrice', item.get('totalPrice'))
-            installments_pki.append(pki_builder.get_request_string())
-        return installments_pki
-
-    @staticmethod
-    def card_pki(card):
-        pki_builder = iyzipay.PKIBuilder('')
-        pki_builder.append('cardAlias', card.get('cardAlias'))
-        pki_builder.append('cardNumber', card.get('cardNumber'))
-        pki_builder.append('expireYear', card.get('expireYear'))
-        pki_builder.append('expireMonth', card.get('expireMonth'))
-        pki_builder.append('cardHolderName', card.get('cardHolderName'))
-        return pki_builder.get_request_string()
-
-    @staticmethod
-    def reward_usage_pki(reward_usage):
-        pki_builder = iyzipay.PKIBuilder('')
-        pki_builder.append('rewardAmount', reward_usage.get('rewardAmount'))
-        pki_builder.append('rewardUsage', reward_usage.get('rewardUsage'))
-        return pki_builder.get_request_string()
 
 class ApiTest(IyzipayResource):
     def retrieve(self, options):
@@ -207,656 +106,216 @@ def retrieve(self, options):
 
 class BinNumber(IyzipayResource):
     def retrieve(self, request, options):
-        pki = self.to_pki_string(request)
-        return self.connect('POST', '/payment/bin/check', options, request, pki)
-
-    def to_pki_string(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append('binNumber', request.get('binNumber'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/payment/bin/check', options, request)
 
 
 class InstallmentInfo(IyzipayResource):
     def retrieve(self, request, options):
-        pki = self.to_pki_string(request)
-        return self.connect('POST', '/payment/iyzipos/installment', options, request, pki)
-
-    def to_pki_string(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append('binNumber', request.get('binNumber'))
-        pki_builder.append_price('price', request.get('price'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/payment/iyzipos/installment', options, request)
 
 
 class Approval(IyzipayResource):
     def create(self, request, options):
-        pki = self.to_pki_string(request)
-        return self.connect('POST', '/payment/iyzipos/item/approve', options, request, pki)
-
-    def to_pki_string(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append('paymentTransactionId', request.get('paymentTransactionId'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/payment/iyzipos/item/approve', options, request)
 
 
 class Disapproval(IyzipayResource):
     def create(self, request, options):
-        pki = self.to_pki_string(request)
-        return self.connect('POST', '/payment/iyzipos/item/disapprove', options, request, pki)
-
-    def to_pki_string(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append('paymentTransactionId', request.get('paymentTransactionId'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/payment/iyzipos/item/disapprove', options, request)
 
 
 class CheckoutFormInitialize(IyzipayResource):
     def create(self, request, options):
-        pki = self.to_pki_string(request)
-        return self.connect('POST', '/payment/iyzipos/checkoutform/initialize/ecom', options, request, pki)
-
-    def to_pki_string(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append_price('price', request.get('price'))
-        pki_builder.append('basketId', request.get('basketId'))
-        pki_builder.append('paymentGroup', request.get('paymentGroup'))
-        pki_builder.append('buyer', self.buyer_pki(request.get('buyer')))
-        pki_builder.append('shippingAddress', self.address_pki(request.get('shippingAddress')))
-        pki_builder.append('billingAddress', self.address_pki(request.get('billingAddress')))
-        pki_builder.append_array('basketItems', self.basket_pki(request.get('basketItems')))
-        pki_builder.append('callbackUrl', request.get('callbackUrl'))
-        pki_builder.append('paymentSource', request.get('paymentSource'))
-        pki_builder.append('currency', request.get('currency'))
-        pki_builder.append('posOrderId', request.get('posOrderId'))
-        pki_builder.append_price('paidPrice', request.get('paidPrice'))
-        pki_builder.append('forceThreeDS', request.get('forceThreeDS'))
-        pki_builder.append('cardUserKey', request.get('cardUserKey'))
-        pki_builder.append_array('enabledInstallments', request.get('enabledInstallments'))
-        pki_builder.append('debitCardAllowed', request.get('debitCardAllowed'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/payment/iyzipos/checkoutform/initialize/ecom', options, request)
 
 
 class CheckoutForm(IyzipayResource):
     def retrieve(self, request, options):
-        pki = self.to_pki_string(request)
-        return self.connect('POST', '/payment/iyzipos/checkoutform/auth/ecom/detail', options, request, pki)
-
-    def to_pki_string(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append('token', request.get('token'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/payment/iyzipos/checkoutform/auth/ecom/detail', options, request)
 
 
 class Payment(IyzipayResource):
     def create(self, request, options):
-        pki = self.to_pki_string_create(request)
-        return self.connect('POST', '/payment/auth', options, request, pki)
+        return self.connect('POST', '/payment/auth', options, request)
 
     def retrieve(self, request, options):
-        pki = self.to_pki_string_retrieve(request)
-        return self.connect('POST', '/payment/detail', options, request, pki)
-
-    def to_pki_string_create(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append_price('price', request.get('price'))
-        pki_builder.append_price('paidPrice', request.get('paidPrice'))
-        pki_builder.append('installment', request.get('installment'))
-        pki_builder.append('paymentChannel', request.get('paymentChannel'))
-        pki_builder.append('basketId', request.get('basketId'))
-        pki_builder.append('paymentGroup', request.get('paymentGroup'))
-        pki_builder.append('paymentCard', self.payment_card_pki(request.get('paymentCard')))
-        pki_builder.append('buyer', self.buyer_pki(request.get('buyer')))
-        pki_builder.append('shippingAddress', self.address_pki(request.get('shippingAddress')))
-        pki_builder.append('billingAddress', self.address_pki(request.get('billingAddress')))
-        pki_builder.append_array('basketItems', self.basket_pki(request.get('basketItems')))
-        pki_builder.append('paymentSource', request.get('paymentSource'))
-        pki_builder.append('currency', request.get('currency'))
-        pki_builder.append('posOrderId', request.get('posOrderId'))
-        pki_builder.append('connectorName', request.get('connectorName'))
-        pki_builder.append('plusInstallmentUsage', request.get('plusInstallmentUsage'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/payment/detail', options, request)
 
-    def to_pki_string_retrieve(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append('paymentId', request.get('paymentId'))
-        pki_builder.append('paymentConversationId', request.get('paymentConversationId'))
-        return pki_builder.get_request_string()
+    def refund(self, request, options):
+        return self.connect('POST', '/v2/payment/refund', options, request)
 
 
 class ThreedsInitialize(IyzipayResource):
     def create(self, request, options):
-        pki = self.to_pki_string(request)
-        return self.connect('POST', '/payment/3dsecure/initialize', options, request, pki)
-
-    def to_pki_string(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append_price('price', request.get('price'))
-        pki_builder.append_price('paidPrice', request.get('paidPrice'))
-        pki_builder.append('installment', request.get('installment'))
-        pki_builder.append('paymentChannel', request.get('paymentChannel'))
-        pki_builder.append('basketId', request.get('basketId'))
-        pki_builder.append('paymentGroup', request.get('paymentGroup'))
-        pki_builder.append('paymentCard', self.payment_card_pki(request.get('paymentCard')))
-        pki_builder.append('buyer', self.buyer_pki(request.get('buyer')))
-        pki_builder.append('shippingAddress', self.address_pki(request.get('shippingAddress')))
-        pki_builder.append('billingAddress', self.address_pki(request.get('billingAddress')))
-        pki_builder.append_array('basketItems', self.basket_pki(request.get('basketItems')))
-        pki_builder.append('paymentSource', request.get('paymentSource'))
-        pki_builder.append('currency', request.get('currency'))
-        pki_builder.append('posOrderId', request.get('posOrderId'))
-        pki_builder.append('connectorName', request.get('connectorName'))
-        pki_builder.append('plusInstallmentUsage', request.get('plusInstallmentUsage'))
-        pki_builder.append('callbackUrl', request.get('callbackUrl'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/payment/3dsecure/initialize', options, request)
 
 
 class ThreedsPayment(IyzipayResource):
     def create(self, request, options):
-        pki = self.to_pki_string_create(request)
-        return self.connect('POST', '/payment/3dsecure/auth', options, request, pki)
+        return self.connect('POST', '/payment/3dsecure/auth', options, request)
 
     def retrieve(self, request, options):
-        pki = self.to_pki_string_retrieve(request)
-        return self.connect('POST', '/payment/detail', options, request, pki)
+        return self.connect('POST', '/payment/detail', options, request)
 
-    def to_pki_string_create(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append('paymentId', request.get('paymentId'))
-        pki_builder.append('conversationData', request.get('conversationData'))
-        return pki_builder.get_request_string()
 
-    def to_pki_string_retrieve(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append('paymentId', request.get('paymentId'))
-        pki_builder.append('paymentConversationId', request.get('paymentConversationId'))
-        return pki_builder.get_request_string()
+class ThreedsV2Payment(IyzipayResource):
+    def create(self, request, options):
+        return self.connect('POST', '/payment/v2/3dsecure/auth', options, request)
 
 
 class Cancel(IyzipayResource):
     def create(self, request, options):
-        pki = self.to_pki_string(request)
-        return self.connect('POST', '/payment/cancel', options, request, pki)
-
-    def to_pki_string(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append('paymentId', request.get('paymentId'))
-        pki_builder.append('ip', request.get('ip'))
-        pki_builder.append('reason', request.get('reason'))
-        pki_builder.append('description', request.get('description'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/payment/cancel', options, request)
 
 
 class Refund(IyzipayResource):
     def create(self, request, options):
-        pki = self.to_pki_string(request)
-        return self.connect('POST', '/payment/refund', options, request, pki)
-
-    def to_pki_string(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append('paymentTransactionId', request.get('paymentTransactionId'))
-        pki_builder.append_price('price', request.get('price'))
-        pki_builder.append('ip', request.get('ip'))
-        pki_builder.append('currency', request.get('currency'))
-        pki_builder.append('reason', request.get('reason'))
-        pki_builder.append('description', request.get('description'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/payment/refund', options, request)
 
 
 class Card(IyzipayResource):
     def create(self, request, options):
-        pki = self.to_pki_string_create(request)
-        return self.connect('POST', '/cardstorage/card', options, request, pki)
+        return self.connect('POST', '/cardstorage/card', options, request)
 
     def delete(self, request, options):
-        pki = self.to_pki_string_delete(request)
-        return self.connect('DELETE', '/cardstorage/card', options, request, pki)
-
-    def to_pki_string_create(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append('externalId', request.get('externalId'))
-        pki_builder.append('email', request.get('email'))
-        pki_builder.append('cardUserKey', request.get('cardUserKey'))
-        pki_builder.append('card', self.card_pki(request.get('card')))
-        return pki_builder.get_request_string()
-
-    def to_pki_string_delete(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append('cardUserKey', request.get('cardUserKey'))
-        pki_builder.append('cardToken', request.get('cardToken'))
-        return pki_builder.get_request_string()
+        return self.connect('DELETE', '/cardstorage/card', options, request)
 
 
 class CardList(IyzipayResource):
     def retrieve(self, request, options):
-        pki = self.to_pki_string(request)
-        return self.connect('POST', '/cardstorage/cards', options, request, pki)
-
-    def to_pki_string(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append('cardUserKey', request.get('cardUserKey'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/cardstorage/cards', options, request)
 
 
 class Bkm(IyzipayResource):
     def retrieve(self, request, options):
-        pki = self.to_pki_string(request)
-        return self.connect('POST', '/payment/bkm/auth/detail', options, request, pki)
-
-    def to_pki_string(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append('token', request.get('token'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/payment/bkm/auth/detail', options, request)
 
 
 class BkmInitialize(IyzipayResource):
     def create(self, request, options):
-        pki = self.to_pki_string(request)
-        return self.connect('POST', '/payment/bkm/initialize', options, request, pki)
-
-    def to_pki_string(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append_price('price', request.get('price'))
-        pki_builder.append('basketId', request.get('basketId'))
-        pki_builder.append('paymentGroup', request.get('paymentGroup'))
-        pki_builder.append('buyer', self.buyer_pki(request.get('buyer')))
-        pki_builder.append('shippingAddress', self.address_pki(request.get('shippingAddress')))
-        pki_builder.append('billingAddress', self.address_pki(request.get('billingAddress')))
-        pki_builder.append_array('basketItems', self.basket_pki(request.get('basketItems')))
-        pki_builder.append('callbackUrl', request.get('callbackUrl'))
-        pki_builder.append('paymentSource', request.get('paymentSource'))
-        pki_builder.append_array('enabledInstallments', request.get('enabledInstallments'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/payment/bkm/initialize', options, request)
 
 
 class PeccoInitialize(IyzipayResource):
     def create(self, request, options):
-        pki = self.to_pki_string(request)
-        return self.connect('POST', '/payment/pecco/initialize', options, request, pki)
-
-    def to_pki_string(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append_price('price', request.get('price'))
-        pki_builder.append('basketId', request.get('basketId'))
-        pki_builder.append('paymentGroup', request.get('paymentGroup'))
-        pki_builder.append('buyer', self.buyer_pki(request.get('buyer')))
-        pki_builder.append('shippingAddress', self.address_pki(request.get('shippingAddress')))
-        pki_builder.append('billingAddress', self.address_pki(request.get('billingAddress')))
-        pki_builder.append_array('basketItems', self.basket_pki(request.get('basketItems')))
-        pki_builder.append('callbackUrl', request.get('callbackUrl'))
-        pki_builder.append('paymentSource', request.get('paymentSource'))
-        pki_builder.append('currency', request.get('currency'))
-        pki_builder.append_price('paidPrice', request.get('paidPrice'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/payment/pecco/initialize', options, request)
 
 
 class PeccoPayment(IyzipayResource):
     def create(self, request, options):
-        pki = self.to_pki_string(request)
-        return self.connect('POST', '/payment/pecco/auth', options, request, pki)
-
-    def to_pki_string(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append('token', request.get('token'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/payment/pecco/auth', options, request)
 
 
 class CheckoutFormInitializePreAuth(IyzipayResource):
     def create(self, request, options):
-        pki = self.to_pki_string(request)
-        return self.connect('POST', '/payment/iyzipos/checkoutform/initialize/preauth/ecom', options, request, pki)
-
-    def to_pki_string(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append_price('price', request.get('price'))
-        pki_builder.append('basketId', request.get('basketId'))
-        pki_builder.append('paymentGroup', request.get('paymentGroup'))
-        pki_builder.append('buyer', self.buyer_pki(request.get('buyer')))
-        pki_builder.append('shippingAddress', self.address_pki(request.get('shippingAddress')))
-        pki_builder.append('billingAddress', self.address_pki(request.get('billingAddress')))
-        pki_builder.append_array('basketItems', self.basket_pki(request.get('basketItems')))
-        pki_builder.append('callbackUrl', request.get('callbackUrl'))
-        pki_builder.append('paymentSource', request.get('paymentSource'))
-        pki_builder.append('currency', request.get('currency'))
-        pki_builder.append('posOrderId', request.get('posOrderId'))
-        pki_builder.append_price('paidPrice', request.get('paidPrice'))
-        pki_builder.append('forceThreeDS', request.get('forceThreeDS'))
-        pki_builder.append('cardUserKey', request.get('cardUserKey'))
-        pki_builder.append_array('enabledInstallments', request.get('enabledInstallments'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/payment/iyzipos/checkoutform/initialize/preauth/ecom', options, request)
 
 
 class PaymentPreAuth(IyzipayResource):
     def create(self, request, options):
-        pki = self.to_pki_string_create(request)
-        return self.connect('POST', '/payment/preauth', options, request, pki)
+        return self.connect('POST', '/payment/preauth', options, request)
 
     def retrieve(self, request, options):
-        pki = self.to_pki_string_retrieve(request)
-        return self.connect('POST', '/payment/detail', options, request, pki)
-
-    def to_pki_string_create(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append_price('price', request.get('price'))
-        pki_builder.append_price('paidPrice', request.get('paidPrice'))
-        pki_builder.append('installment', request.get('installment'))
-        pki_builder.append('paymentChannel', request.get('paymentChannel'))
-        pki_builder.append('basketId', request.get('basketId'))
-        pki_builder.append('paymentGroup', request.get('paymentGroup'))
-        pki_builder.append('paymentCard', self.payment_card_pki(request.get('paymentCard')))
-        pki_builder.append('buyer', self.buyer_pki(request.get('buyer')))
-        pki_builder.append('shippingAddress', self.address_pki(request.get('shippingAddress')))
-        pki_builder.append('billingAddress', self.address_pki(request.get('billingAddress')))
-        pki_builder.append_array('basketItems', self.basket_pki(request.get('basketItems')))
-        pki_builder.append('paymentSource', request.get('paymentSource'))
-        pki_builder.append('currency', request.get('currency'))
-        return pki_builder.get_request_string()
-
-    def to_pki_string_retrieve(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append('paymentId', request.get('paymentId'))
-        pki_builder.append('paymentConversationId', request.get('paymentConversationId'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/payment/detail', options, request)
 
 
 class PaymentPostAuth(IyzipayResource):
     def create(self, request, options):
-        pki = self.to_pki_string_create(request)
-        return self.connect('POST', '/payment/postauth', options, request, pki)
-
-    def to_pki_string_create(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append('paymentId', request.get('paymentId'))
-        pki_builder.append('ip', request.get('ip'))
-        pki_builder.append_price('paidPrice', request.get('paidPrice'))
-        pki_builder.append('currency', request.get('currency'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/payment/postauth', options, request)
 
 
 class ThreedsInitializePreAuth(IyzipayResource):
     def create(self, request, options):
-        pki = self.to_pki_string(request)
-        return self.connect('POST', '/payment/3dsecure/initialize/preauth', options, request, pki)
-
-    def to_pki_string(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append_price('price', request.get('price'))
-        pki_builder.append_price('paidPrice', request.get('paidPrice'))
-        pki_builder.append('installment', request.get('installment'))
-        pki_builder.append('paymentChannel', request.get('paymentChannel'))
-        pki_builder.append('basketId', request.get('basketId'))
-        pki_builder.append('paymentGroup', request.get('paymentGroup'))
-        pki_builder.append('paymentCard', self.payment_card_pki(request.get('paymentCard')))
-        pki_builder.append('buyer', self.buyer_pki(request.get('buyer')))
-        pki_builder.append('shippingAddress', self.address_pki(request.get('shippingAddress')))
-        pki_builder.append('billingAddress', self.address_pki(request.get('billingAddress')))
-        pki_builder.append_array('basketItems', self.basket_pki(request.get('basketItems')))
-        pki_builder.append('paymentSource', request.get('paymentSource'))
-        pki_builder.append('currency', request.get('currency'))
-        pki_builder.append('callbackUrl', request.get('callbackUrl'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/payment/3dsecure/initialize/preauth', options, request)
 
 
 class RefundChargedFromMerchant(IyzipayResource):
     def create(self, request, options):
-        pki = self.to_pki_string(request)
-        return self.connect('POST', '/payment/iyzipos/refund/merchant/charge', options, request, pki)
-
-    def to_pki_string(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append('paymentTransactionId', request.get('paymentTransactionId'))
-        pki_builder.append_price('price', request.get('price'))
-        pki_builder.append('ip', request.get('ip'))
-        pki_builder.append('currency', request.get('currency'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/payment/iyzipos/refund/merchant/charge', options, request)
 
 
 class PayoutCompletedTransactionList(IyzipayResource):
     def retrieve(self, request, options):
-        pki = self.to_pki_string(request)
-        return self.connect('POST', '/reporting/settlement/payoutcompleted', options, request, pki)
-
-    def to_pki_string(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append('date', request.get('date'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/reporting/settlement/payoutcompleted', options, request)
 
 
 class BouncedBankTransferList(IyzipayResource):
     def retrieve(self, request, options):
-        pki = self.to_pki_string(request)
-        return self.connect('POST', '/reporting/settlement/bounced', options, request, pki)
-
-    def to_pki_string(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append('date', request.get('date'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/reporting/settlement/bounced', options, request)
 
 
 class SubMerchant(IyzipayResource):
     def create(self, request, options):
-        pki = self.to_pki_string_create(request)
-        return self.connect('POST', '/onboarding/submerchant', options, request, pki)
+        return self.connect('POST', '/onboarding/submerchant', options, request)
 
     def update(self, request, options):
-        pki = self.to_pki_string_update(request)
-        return self.connect('PUT', '/onboarding/submerchant', options, request, pki)
+        return self.connect('PUT', '/onboarding/submerchant', options, request)
 
-    def retrieve(self, request, options):
-        pki = self.to_pki_string_retrieve(request)
-        return self.connect('POST', '/onboarding/submerchant/detail', options, request, pki)
+    def update_item(self, request, options):
+        return self.connect('PUT', '/payment/item', options, request)
 
-    def to_pki_string_create(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append('name', request.get('name'))
-        pki_builder.append('email', request.get('email'))
-        pki_builder.append('gsmNumber', request.get('gsmNumber'))
-        pki_builder.append('address', request.get('address'))
-        pki_builder.append('iban', request.get('iban'))
-        pki_builder.append('taxOffice', request.get('taxOffice'))
-        pki_builder.append('contactName', request.get('contactName'))
-        pki_builder.append('contactSurname', request.get('contactSurname'))
-        pki_builder.append('legalCompanyTitle', request.get('legalCompanyTitle'))
-        pki_builder.append('swiftCode', request.get('swiftCode'))
-        pki_builder.append('currency', request.get('currency'))
-        pki_builder.append('subMerchantExternalId', request.get('subMerchantExternalId'))
-        pki_builder.append('identityNumber', request.get('identityNumber'))
-        pki_builder.append('taxNumber', request.get('taxNumber'))
-        pki_builder.append('subMerchantType', request.get('subMerchantType'))
-        return pki_builder.get_request_string()
-
-    def to_pki_string_update(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append('name', request.get('name'))
-        pki_builder.append('email', request.get('email'))
-        pki_builder.append('gsmNumber', request.get('gsmNumber'))
-        pki_builder.append('address', request.get('address'))
-        pki_builder.append('iban', request.get('iban'))
-        pki_builder.append('taxOffice', request.get('taxOffice'))
-        pki_builder.append('contactName', request.get('contactName'))
-        pki_builder.append('contactSurname', request.get('contactSurname'))
-        pki_builder.append('legalCompanyTitle', request.get('legalCompanyTitle'))
-        pki_builder.append('swiftCode', request.get('swiftCode'))
-        pki_builder.append('currency', request.get('currency'))
-        pki_builder.append('subMerchantKey', request.get('subMerchantKey'))
-        pki_builder.append('identityNumber', request.get('identityNumber'))
-        pki_builder.append('taxNumber', request.get('taxNumber'))
-        return pki_builder.get_request_string()
-
-    def to_pki_string_retrieve(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append('subMerchantExternalId', request.get('subMerchantExternalId'))
-        return pki_builder.get_request_string()
+    def retrieve(self, request, options):
+        return self.connect('POST', '/onboarding/submerchant/detail', options, request)
 
 
 class CrossBookingToSubMerchant(IyzipayResource):
     def create(self, request, options):
-        pki = self.to_pki_string(request)
-        return self.connect('POST', '/crossbooking/send', options, request, pki)
-
-    def to_pki_string(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append('subMerchantKey', request.get('subMerchantKey'))
-        pki_builder.append_price('price', request.get('price'))
-        pki_builder.append('reason', request.get('reason'))
-        pki_builder.append('currency', request.get('currency'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/crossbooking/send', options, request)
 
 
 class CrossBookingFromSubMerchant(IyzipayResource):
     def create(self, request, options):
-        pki = self.to_pki_string(request)
-        return self.connect('POST', '/crossbooking/receive', options, request, pki)
-
-    def to_pki_string(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append('subMerchantKey', request.get('subMerchantKey'))
-        pki_builder.append_price('price', request.get('price'))
-        pki_builder.append('reason', request.get('reason'))
-        pki_builder.append('currency', request.get('currency'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/crossbooking/receive', options, request)
 
 
 class BasicPayment(IyzipayResource):
     def create(self, request, options):
-        pki = self.to_pki_string(request)
-        return self.connect('POST', '/payment/auth/basic', options, request, pki)
-
-    def to_pki_string(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append_price('price', request.get('price'))
-        pki_builder.append_price('paidPrice', request.get('paidPrice'))
-        pki_builder.append('installment', request.get('installment'))
-        pki_builder.append('buyerEmail', request.get('buyerEmail'))
-        pki_builder.append('buyerId', request.get('buyerId'))
-        pki_builder.append('buyerIp', request.get('buyerIp'))
-        pki_builder.append('posOrderId', request.get('posOrderId'))
-        pki_builder.append('paymentCard', self.payment_card_pki(request.get('paymentCard')))
-        pki_builder.append('currency', request.get('currency'))
-        pki_builder.append('connectorName', request.get('connectorName'))
-        pki_builder.append('callbackUrl', request.get('callbackUrl'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/payment/auth/basic', options, request)
 
 
 class BasicPaymentPreAuth(IyzipayResource):
     def create(self, request, options):
-        pki = self.to_pki_string(request)
-        return self.connect('POST', '/payment/preauth/basic', options, request, pki)
-
-    def to_pki_string(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append_price('price', request.get('price'))
-        pki_builder.append_price('paidPrice', request.get('paidPrice'))
-        pki_builder.append('installment', request.get('installment'))
-        pki_builder.append('buyerEmail', request.get('buyerEmail'))
-        pki_builder.append('buyerId', request.get('buyerId'))
-        pki_builder.append('buyerIp', request.get('buyerIp'))
-        pki_builder.append('posOrderId', request.get('posOrderId'))
-        pki_builder.append('paymentCard', self.payment_card_pki(request.get('paymentCard')))
-        pki_builder.append('currency', request.get('currency'))
-        pki_builder.append('connectorName', request.get('connectorName'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/payment/preauth/basic', options, request)
 
 
 class BasicPaymentPostAuth(IyzipayResource):
     def create(self, request, options):
-        pki = self.to_pki_string_create(request)
-        return self.connect('POST', '/payment/postauth/basic', options, request, pki)
-
-    def to_pki_string_create(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append('paymentId', request.get('paymentId'))
-        pki_builder.append('ip', request.get('ip'))
-        pki_builder.append_price('paidPrice', request.get('paidPrice'))
-        pki_builder.append('currency', request.get('currency'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/payment/postauth/basic', options, request)
 
 
 class BasicThreedsInitialize(IyzipayResource):
     def create(self, request, options):
-        pki = self.to_pki_string(request)
-        return self.connect('POST', '/payment/3dsecure/initialize/basic', options, request, pki)
-
-    def to_pki_string(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append_price('price', request.get('price'))
-        pki_builder.append_price('paidPrice', request.get('paidPrice'))
-        pki_builder.append('installment', request.get('installment'))
-        pki_builder.append('buyerEmail', request.get('buyerEmail'))
-        pki_builder.append('buyerId', request.get('buyerId'))
-        pki_builder.append('buyerIp', request.get('buyerIp'))
-        pki_builder.append('posOrderId', request.get('posOrderId'))
-        pki_builder.append('paymentCard', self.payment_card_pki(request.get('paymentCard')))
-        pki_builder.append('currency', request.get('currency'))
-        pki_builder.append('connectorName', request.get('connectorName'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/payment/3dsecure/initialize/basic', options, request)
 
 
 class BasicThreedsInitializePreAuth(IyzipayResource):
     def create(self, request, options):
-        pki = self.to_pki_string(request)
-        return self.connect('POST', '/payment/iyziconnect/initialize3ds/preauth', options, request, pki)
-
-    def to_pki_string(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append_price('price', request.get('price'))
-        pki_builder.append_price('paidPrice', request.get('paidPrice'))
-        pki_builder.append('installment', request.get('installment'))
-        pki_builder.append('buyerEmail', request.get('buyerEmail'))
-        pki_builder.append('buyerId', request.get('buyerId'))
-        pki_builder.append('buyerIp', request.get('buyerIp'))
-        pki_builder.append('posOrderId', request.get('posOrderId'))
-        pki_builder.append('paymentCard', self.payment_card_pki(request.get('paymentCard')))
-        pki_builder.append('currency', request.get('currency'))
-        pki_builder.append('connectorName', request.get('connectorName'))
-        pki_builder.append('callbackUrl', request.get('callbackUrl'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/payment/iyziconnect/initialize3ds/preauth', options, request)
 
 
 class BasicThreedsPayment(IyzipayResource):
     def create(self, request, options):
-        pki = self.to_pki_string(request)
-        return self.connect('POST', '/payment/3dsecure/auth/basic', options, request, pki)
-
-    def to_pki_string(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append('paymentId', request.get('paymentId'))
-        pki_builder.append('conversationData', request.get('conversationData'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/payment/3dsecure/auth/basic', options, request)
 
 
 class BasicBkm(IyzipayResource):
     def retrieve(self, request, options):
-        pki = self.to_pki_string(request)
-        return self.connect('POST', '/payment/bkm/auth/detail/basic', options, request, pki)
-
-    def to_pki_string(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append('token', request.get('token'))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/payment/bkm/auth/detail/basic', options, request)
 
 
 class BasicBkmInitialize(IyzipayResource):
     def create(self, request, options):
-        pki = self.to_pki_string(request)
-        return self.connect('POST', '/payment/bkm/initialize/basic', options, request, pki)
-
-    def to_pki_string(self, request):
-        pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
-        pki_builder.append('connectorName', request.get('connectorName'))
-        pki_builder.append_price('price', request.get('price'))
-        pki_builder.append('callbackUrl', request.get('callbackUrl'))
-        pki_builder.append('buyerEmail', request.get('buyerEmail'))
-        pki_builder.append('buyerId', request.get('buyerId'))
-        pki_builder.append('buyerIp', request.get('buyerIp'))
-        pki_builder.append('posOrderId', request.get('posOrderId'))
-        pki_builder.append_array('installmentDetails', self.installment_details_pki(request.get('installmentDetails')))
-        return pki_builder.get_request_string()
+        return self.connect('POST', '/payment/bkm/initialize/basic', options, request)
 
 
 class RetrievePaymentDetails(IyzipayResource):
     def retrieve(self, request, options):
+        payment_id = str(request.get('paymentId'))
         payment_conversation_id = str(request.get('paymentConversationId'))
-        return self.connect('GET', '/v2/reporting/payment/details?paymentConversationId=' + payment_conversation_id, options)
+        param_name = 'paymentId' if payment_id else 'paymentConversationId'
+        param_value = payment_id if payment_id else payment_conversation_id
+        param = param_name + '=' + param_value
+        return self.connect('GET', '/v2/reporting/payment/details?' + param, options)
 
 
 class RetrieveTransactions(IyzipayResource):
@@ -867,6 +326,16 @@ def retrieve(self, request, options):
         return self.connect('GET', '/v2/reporting/payment/transactions?' + query_params, options)
 
 
+class ReportingScrollTransaction(IyzipayResource):
+    def retrieve(self, request, options):
+        transaction_date = request.get('transactionDate')
+        document_scrolling_vo_sort_order = request.get('documentScrollVoSortingOrder')
+        last_id = request.get('lastId')
+        conversation_id = request.get('conversationId')
+        params = 'transactionDate=' + transaction_date + '&documentScrollVoSortingOrder=' + document_scrolling_vo_sort_order + '&lastId=' + last_id + '&conversationId=' + conversation_id
+        return self.connect('GET', '/v2/reporting/payment/scroll-transactions?' + params, options)
+
+
 class IyziFileBase64Encoder:
     @staticmethod
     def encode(file_path):
@@ -876,8 +345,12 @@ def encode(file_path):
 
 class IyziLinkProduct(IyzipayResource):
     def create(self, request, options):
-        return self.connect('POST', '/v2/iyzilink/products/', options, request)
-    
+        return self.connect('POST', '/v2/iyzilink/products', options, request)
+
+    def fast_link(self, request, options):
+        locale = str(request.get('locale', 'tr'))
+        return self.connect('POST', '/v2/iyzilink/fast-link/products?locale=' + locale, options, request)
+
     def retrieve(self, request, options):
         if request.get('token') is None:
             raise Exception('token must be in request')
@@ -894,7 +367,16 @@ def update(self, request, options):
             raise Exception('token must be in request')
         token = str(request.get('token'))
         return self.connect('PUT', '/v2/iyzilink/products/' + token, options, request)
-    
+
+    def update_product_status(self, request, options):
+        if request.get('token') is None:
+            raise Exception('token must be in request')
+        token = str(request.get('token'))
+        if request.get('status') is None:
+            raise Exception('status must be in request')
+        status = str(request.get('status'))
+        return self.connect('PATCH', '/v2/iyzilink/products/' + token + '/status/' + status, options)
+
     def delete(self, request, options):
         if request.get('token') is None:
             raise Exception('token must be in request')
@@ -904,11 +386,147 @@ def delete(self, request, options):
 
 class RetrieveLoyalty(IyzipayResource):
     def retrieve(self, request, options):
-        pki = self.to_pki_string_create(request)
-        return self.connect('POST', '/payment/loyalty/inquire', options, request, pki)
+        return self.connect('POST', '/payment/loyalty/inquire', options, request)
 
     def to_pki_string_create(self, request):
         pki_builder = iyzipay.PKIBuilder(self.resource_pki(request))
         pki_builder.append('paymentCard', self.payment_card_pki(request.get('paymentCard')))
         pki_builder.append('currency', request.get('currency'))
         return pki_builder.get_request_string()
+
+
+class PayWithIyzico(IyzipayResource):
+    def create(self, request, options):
+        return self.connect('POST', '/payment/pay-with-iyzico/initialize', options, request)
+
+
+class SubscriptionProduct(IyzipayResource):
+    url = '/v2/subscription/products'
+
+    def create(self, request, options):
+        return self.connect('POST', self.url, options, request)
+
+    def list(self, options):
+        return self.connect('GET', self.url, options)
+
+    def retrieve(self, request, options):
+        product_reference_code = str(request.get('product_reference_code'))
+        return self.connect('GET', self.url + '/' + product_reference_code, options)
+
+    def delete(self, request, options):
+        product_reference_code = str(request.get('product_reference_code'))
+        return self.connect('DELETE', self.url + '/' + product_reference_code, options)
+
+    def update(self, request, options):
+        product_reference_code = str(request.get('product_reference_code'))
+        return self.connect('POST', self.url + '/' + product_reference_code, options, request)
+
+
+class SubscriptionPricingPlan(IyzipayResource):
+    product_url = '/v2/subscription/products/'
+    pricing_plan_url = '/v2/subscription/pricing-plans/'
+
+    def create(self, request, options):
+        product_reference_code = str(request.get('product_reference_code'))
+        return self.connect('POST', self.product_url + product_reference_code + '/pricing-plans', options, request)
+
+    def list(self, request, options):
+        product_reference_code = str(request.get('product_reference_code'))
+        return self.connect('GET', self.product_url + product_reference_code + '/pricing-plans', options)
+
+    def update(self, request, options):
+        pricing_plan_reference_code = str(request.get('pricing_plan_reference_code'))
+        return self.connect('POST', self.pricing_plan_url + pricing_plan_reference_code, options, request)
+
+    def retrieve(self, request, options):
+        pricing_plan_reference_code = str(request.get('pricing_plan_reference_code'))
+        return self.connect('GET', self.pricing_plan_url + pricing_plan_reference_code, options)
+
+    def delete(self, request, options):
+        pricing_plan_reference_code = str(request.get('pricing_plan_reference_code'))
+        return self.connect('DELETE', self.pricing_plan_url + pricing_plan_reference_code, options)
+
+
+class SubscriptionCheckoutForm(IyzipayResource):
+    url = '/v2/subscription/checkoutform'
+
+    def create(self, request, options):
+        return self.connect('POST', self.url + '/initialize', options, request)
+
+    def retrieve(self, request, options):
+        token = str(request.get('token'))
+        return self.connect('GET', self.url + '/' + token, options, request)
+
+
+class Subscription(IyzipayResource):
+    url = '/v2/subscription'
+
+    def retrieve(self, options):
+        return self.connect('GET', self.url + '/subscriptions', options)
+
+    def initialize(self, request, options):
+        return self.connect('POST', self.url + '/initialize', options, request)
+
+    def initialize_with_customer(self, request, options):
+        return self.connect('POST', self.url + '/initialize/with-customer', options, request)
+
+    def list(self, request, options):
+        query = urlencode({k: v for k, v in (request or {}).items() if v is not None}, doseq=True)
+        list_url = self.url + '/subscriptions'
+        if query:
+            list_url += '?' + query
+        return self.connect('GET', list_url, options)
+
+    def activate(self, request, options):
+        subscription_reference_code = str(request.get('referenceCode'))
+        activate_url = '/subscriptions/' + subscription_reference_code + '/activate'
+        return self.connect('POST', self.url + activate_url, options, request)
+
+    def retry(self, request, options):
+        return self.connect('POST', self.url + '/operation/retry', options, request)
+
+    def cancel(self, request, options):
+        subscription_reference_code = str(request.get('subscriptionReferenceCode'))
+        cancel_url = '/subscriptions/' + subscription_reference_code + '/cancel'
+        return self.connect('POST', self.url + cancel_url, options, request)
+
+    def upgrade(self, request, options):
+        subscription_reference_code = str(request.get('subscriptionReferenceCode'))
+        upgrade_url = '/subscriptions/' + subscription_reference_code + '/upgrade'
+        return self.connect('POST', self.url + upgrade_url, options, request)
+
+
+class SubscriptionCardUpdate(IyzipayResource):
+    url = "/v2/subscription/card-update/checkoutform/initialize"
+
+    def initialize(self, request, options):
+        return self.connect('POST', self.url, options, request)
+
+    def initialize_with_subscription(self, request, options):
+        return self.connect('POST', self.url + '/with-subscription', options, request)
+
+
+class SubscriptionCustomer(IyzipayResource):
+    url = "/v2/subscription/customers"
+
+    def create(self, request, options):
+        return self.connect('POST', self.url, options, request)
+
+    def update(self, request, options):
+        customer_reference_code = str(request.get('customerReferenceCode'))
+        return self.connect('POST', self.url + '/' + customer_reference_code, options, request)
+
+    def retrieve(self, request, options):
+        customer_reference_code = str(request.get('customerReferenceCode'))
+        return self.connect('GET', self.url + '/' + customer_reference_code, options)
+
+    def delete(self, request, options):
+        customer_reference_code = str(request.get('customerReferenceCode'))
+        return self.connect('POST', self.url + '/delete/' + customer_reference_code, options)
+
+    def list(self, request, options):
+        query = urlencode({k: v for k, v in (request or {}).items() if v is not None}, doseq=True)
+        list_url = self.url
+        if query:
+            list_url += '?' + query
+        return self.connect('GET', list_url, options)
diff --git a/samples/api_test.py b/samples/api_test.py
index f55c7a1..59e25c4 100644
--- a/samples/api_test.py
+++ b/samples/api_test.py
@@ -1,7 +1,9 @@
 import iyzipay
 
 options = {
-    'base_url': iyzipay.base_url
+    'secret_key': iyzipay.secret_key,
+    'api_key': iyzipay.api_key,
+    'base_url': iyzipay.base_url,
 }
 
 api_test = iyzipay.ApiTest().retrieve(options)
diff --git a/samples/create_threeds_v2_payment.py b/samples/create_threeds_v2_payment.py
new file mode 100644
index 0000000..4ad9bc3
--- /dev/null
+++ b/samples/create_threeds_v2_payment.py
@@ -0,0 +1,33 @@
+import json
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+request = {
+    'locale': 'tr',
+    'conversationId': '123456789',
+    'paymentId': '1',
+    'paidPrice': 1.2,
+    'basketId': 'B67832',
+    'currency': 'TRY'
+}
+
+threeds_payment = iyzipay.ThreedsV2Payment()
+threeds_payment_result = threeds_payment.create(request, options)
+threeds_payment_response = json.load(threeds_payment_result)
+print('response:', threeds_payment_response)
+
+if threeds_payment_response['status'] == 'success':
+    secret_key = options['secret_key']
+    paymentId = threeds_payment_response['paymentId']
+    currency = threeds_payment_response['currency']
+    basketId = threeds_payment_response['basketId']
+    conversationId = threeds_payment_response['conversationId']
+    paidPrice = threeds_payment.strip_zero(str(threeds_payment_response['paidPrice']))
+    price = threeds_payment.strip_zero(str(threeds_payment_response['price']))
+    signature = threeds_payment_response['signature']
+    threeds_payment.verify_signature([paymentId, currency, basketId, conversationId, paidPrice, price], secret_key, signature)
diff --git a/samples/images/image.png b/samples/images/image.png
new file mode 100644
index 0000000..0397e50
Binary files /dev/null and b/samples/images/image.png differ
diff --git a/samples/initialize_pay_with_iyzico.py b/samples/initialize_pay_with_iyzico.py
new file mode 100644
index 0000000..11764aa
--- /dev/null
+++ b/samples/initialize_pay_with_iyzico.py
@@ -0,0 +1,61 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+buyer = {
+    "id": "buyerID",
+    "name": "buyerName",
+    "surname": "buyerSurname",
+    "identityNumber": "11111",
+    "email": "test@gmail.com",
+    "gsmNumber": "+905554443322",
+    "registrationAddress": "Burhaniye Mahallesi Atilla Sokak No:7 Üsküdar",
+    "city": "Istanbul",
+    "country": "Turkey",
+    "ip": "85.34.78.112"
+}
+
+address = {
+    "address": "Burhaniye Mahallesi Atilla Sokak No:7 Üsküdar",
+    "contactName": "Contact Name",
+    "city": "Istanbul",
+    "country": "Turkey"
+}
+
+basket_items = [
+    {
+        "id": "ItemID",
+        "price": "1000.0",
+        "name": "IPHONE 11 64GB WHITE NON ACC Beden:KK06 ,Renk:Beyaz",
+        "category1": "IPHONE 11",
+        "itemType": "PHYSICAL",
+        "chargedFromMerchant": "True"
+    }
+]
+
+request = {
+    "locale": "tr",
+    "conversationId": "conversationID",
+    "price": "1000.0",
+    "basketId": "B67832",
+    "paymentGroup": "PRODUCT",
+    "callbackUrl": "https://callback.requestcatcher.com/test",
+    "currency": "TRY",
+    "cancelUrl": "https://www.cancelUrl.com/",
+    "paidPrice": "30.0",
+    "enabledInstallments": [
+        1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
+    ],
+    'buyer': buyer,
+    'shippingAddress': address,
+    'billingAddress': address,
+    'basketItems': basket_items
+}
+
+report = iyzipay.PayWithIyzico().create(request, options)
+
+print(report.read().decode('utf-8'))
diff --git a/samples/iyzilink_create_product.py b/samples/iyzilink_create_product.py
index 1e52c1a..436f6fb 100644
--- a/samples/iyzilink_create_product.py
+++ b/samples/iyzilink_create_product.py
@@ -11,7 +11,7 @@
   "conversationId": "123456789",
   "currencyCode": "TRY",
   "description": "test product new",
-  "encodedImageFile": iyzipay.IyziFileBase64Encoder.encode("image.png"),
+  "encodedImageFile": iyzipay.IyziFileBase64Encoder.encode("./images/image.png"),
   "installmentRequested": False,
   "locale": "tr",
   "name": "awsome product",
diff --git a/samples/iyzilink_fast_link.py b/samples/iyzilink_fast_link.py
new file mode 100644
index 0000000..0d388d1
--- /dev/null
+++ b/samples/iyzilink_fast_link.py
@@ -0,0 +1,19 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+request = {
+    "description": "ft-description-fast-link",
+    "price": 10,
+    "currencyCode": "TRY",
+    "sourceType": "WEB",
+    "locale": "tr",
+    "conversationId": "123456789"
+}
+
+report = iyzipay.IyziLinkProduct().fast_link(request, options)
+print(report.read().decode('utf-8'))
diff --git a/samples/iyzilink_update_product.py b/samples/iyzilink_update_product.py
index fcc0f01..4fb9fc1 100644
--- a/samples/iyzilink_update_product.py
+++ b/samples/iyzilink_update_product.py
@@ -11,7 +11,7 @@
   "conversationId": "123456789",
   "currencyCode": "TRY",
   "description": "iyzi product name",
-  "encodedImageFile": iyzipay.IyziFileBase64Encoder.encode("image.png"),
+  "encodedImageFile": iyzipay.IyziFileBase64Encoder.encode("./images/image.png"),
   "installmentRequested": False,
   "locale": "tr",
   "name": "iyzi product",
diff --git a/samples/iyzilink_update_product_status.py b/samples/iyzilink_update_product_status.py
new file mode 100644
index 0000000..ad0a998
--- /dev/null
+++ b/samples/iyzilink_update_product_status.py
@@ -0,0 +1,17 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+request = {
+    "conversationId": "123456789",
+    "locale": "tr",
+    "token": "WxI",
+    "status": "PASSIVE"
+}
+
+report = iyzipay.IyziLinkProduct().update_product_status(request, options)
+print(report.read().decode('utf-8'))
diff --git a/samples/refund_payment.py b/samples/refund_payment.py
new file mode 100644
index 0000000..f073cec
--- /dev/null
+++ b/samples/refund_payment.py
@@ -0,0 +1,19 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+request = {
+    "locale": "tr",
+    "conversationId": "conversationId",
+    "paymentId": "2921546163",
+    "price": "3.0",
+    "ip": "85.34.78.112"
+}
+
+sub_merchant = iyzipay.Payment().refund(request, options)
+
+print(sub_merchant.read().decode('utf-8'))
diff --git a/samples/retrieve_payment_detail.py b/samples/retrieve_payment_detail.py
index 8d6e544..4759c76 100644
--- a/samples/retrieve_payment_detail.py
+++ b/samples/retrieve_payment_detail.py
@@ -7,8 +7,10 @@
 }
 
 request = {
-    'paymentConversationId': '123456s789'
+    'paymentConversationId': '123456s789',
+    'paymentId': 1
 }
+# Both parameters are not mandatory; one of two is enough
+
 report = iyzipay.RetrievePaymentDetails().retrieve(request, options)
 print(report.read().decode('utf-8'))
-
diff --git a/samples/subscriptions/subscription_activate.py b/samples/subscriptions/subscription_activate.py
new file mode 100644
index 0000000..bcc5e6f
--- /dev/null
+++ b/samples/subscriptions/subscription_activate.py
@@ -0,0 +1,15 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+request = {
+    "referenceCode": "a2077643-bab7-4b73-85a5-7676c78d7c66"
+}
+
+subscription = iyzipay.Subscription().activate(request, options)
+
+print(subscription.read().decode('utf-8'))
diff --git a/samples/subscriptions/subscription_cancel.py b/samples/subscriptions/subscription_cancel.py
new file mode 100644
index 0000000..488ef5a
--- /dev/null
+++ b/samples/subscriptions/subscription_cancel.py
@@ -0,0 +1,15 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+request = {
+    "subscriptionReferenceCode": "a2077643-bab7-4b73-85a5-7676c78d7c66"
+}
+
+subscription = iyzipay.Subscription().cancel(request, options)
+
+print(subscription.read().decode('utf-8'))
diff --git a/samples/subscriptions/subscription_card_update_init.py b/samples/subscriptions/subscription_card_update_init.py
new file mode 100644
index 0000000..ab3d862
--- /dev/null
+++ b/samples/subscriptions/subscription_card_update_init.py
@@ -0,0 +1,17 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+request = {
+    "locale": "tr",
+    "callbackUrl": "https://www.merchant.com/callback",
+    "customerReferenceCode": "7d96e96c-7850-4c63-9ae0-1c9d359e6565"
+}
+
+subscription = iyzipay.SubscriptionCardUpdate().initialize(request, options)
+
+print(subscription.read().decode('utf-8'))
diff --git a/samples/subscriptions/subscription_card_update_init_with_subscription.py b/samples/subscriptions/subscription_card_update_init_with_subscription.py
new file mode 100644
index 0000000..d410ca3
--- /dev/null
+++ b/samples/subscriptions/subscription_card_update_init_with_subscription.py
@@ -0,0 +1,18 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+request = {
+    "locale": "tr",
+    "conversationId": "123456",
+    "callbackUrl": "https://www.merchant.com/callback",
+    "subscriptionReferenceCode": "7d96e96c-7850-4c63-9ae0-1c9d359e6565"
+}
+
+subscription = iyzipay.SubscriptionCardUpdate().initialize_with_subscription(request, options)
+
+print(subscription.read().decode('utf-8'))
diff --git a/samples/subscriptions/subscription_checkout_form_initialize.py b/samples/subscriptions/subscription_checkout_form_initialize.py
new file mode 100644
index 0000000..97d583e
--- /dev/null
+++ b/samples/subscriptions/subscription_checkout_form_initialize.py
@@ -0,0 +1,39 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+request = {
+    "callbackUrl": "http://localhost",
+    "pricingPlanReferenceCode": "36fcd8e3-f99b-4b19-9dc4-f7c30d7f0cd4",
+    "subscriptionInitialStatus": "ACTIVE",
+    "conversationId": "123456789",
+    "customer": {
+        "name": "John",
+        "surname": "Stone",
+        "email": "john@gmail.com",
+        "gsmNumber": "+905545545512",
+        "identityNumber": "1234567890",
+        "billingAddress": {
+            "address": "Altunizade Mah. İnci Çıkmazı Sokak No: 3 İç Kapı No: 10 Üsküdar İstanbul",
+            "zipCode": "34345",
+            "contactName": "contactName",
+            "city": "Istanbul",
+            "country": "Türkiye"
+        },
+        "shippingAddress": {
+            "address": "Altunizade Mah. İnci Çıkmazı Sokak No: 3 İç Kapı No: 10 Üsküdar İstanbul",
+            "zipCode": "34345",
+            "contactName": "contactName",
+            "city": "Istanbul",
+            "country": "Türkiye"
+        }
+    }
+}
+
+checkout_form = iyzipay.SubscriptionCheckoutForm().create(request, options)
+
+print(checkout_form.read().decode('utf-8'))
diff --git a/samples/subscriptions/subscription_checkout_form_retrieve.py b/samples/subscriptions/subscription_checkout_form_retrieve.py
new file mode 100644
index 0000000..500428a
--- /dev/null
+++ b/samples/subscriptions/subscription_checkout_form_retrieve.py
@@ -0,0 +1,15 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+token = {
+    'token': 'b94c27b3-e65f-4e87-880c-54720174d970'
+}
+
+checkout_form = iyzipay.SubscriptionCheckoutForm().retrieve(token, options)
+
+print(checkout_form.read().decode('utf-8'))
diff --git a/samples/subscriptions/subscription_customer_create.py b/samples/subscriptions/subscription_customer_create.py
new file mode 100644
index 0000000..304c79e
--- /dev/null
+++ b/samples/subscriptions/subscription_customer_create.py
@@ -0,0 +1,34 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+request = {
+    "locale": "tr",
+    "name": "Orhan",
+    "surname": "Test",
+    "email": "test@mail.com",
+    "gsmNumber": "+905064728758",
+    "identityNumber": "111111",
+    "billingAddress": {
+        "address": "address1",
+        "zipCode": "zipCode1",
+        "contactName": "contactName1",
+        "city": "city1",
+        "country": "country1"
+    },
+    "shippingAddress": {
+        "address": "address",
+        "zipCode": "zipCode",
+        "contactName": "contactName",
+        "city": "city",
+        "country": "country"
+    }
+}
+
+subscription = iyzipay.SubscriptionCustomer().create(request, options)
+
+print(subscription.read().decode('utf-8'))
diff --git a/samples/subscriptions/subscription_customer_delete.py b/samples/subscriptions/subscription_customer_delete.py
new file mode 100644
index 0000000..61e80e0
--- /dev/null
+++ b/samples/subscriptions/subscription_customer_delete.py
@@ -0,0 +1,15 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+request = {
+    'customerReferenceCode': '994cbfca-2858-42cb-b2f0-5cc81b1f658c'
+}
+
+subscription = iyzipay.SubscriptionCustomer().delete(request, options)
+
+print(subscription.read().decode('utf-8'))
diff --git a/samples/subscriptions/subscription_customer_list.py b/samples/subscriptions/subscription_customer_list.py
new file mode 100644
index 0000000..f74e097
--- /dev/null
+++ b/samples/subscriptions/subscription_customer_list.py
@@ -0,0 +1,16 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+request = {
+    'page': 1,
+    'count': 10,
+}
+
+subscription = iyzipay.SubscriptionCustomer().list(request, options)
+
+print(subscription.read().decode('utf-8'))
diff --git a/samples/subscriptions/subscription_customer_retrieve.py b/samples/subscriptions/subscription_customer_retrieve.py
new file mode 100644
index 0000000..a8315f8
--- /dev/null
+++ b/samples/subscriptions/subscription_customer_retrieve.py
@@ -0,0 +1,15 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+request = {
+    'customerReferenceCode': '994cbfca-2858-42cb-b2f0-5cc81b1f658c'
+}
+
+subscription = iyzipay.SubscriptionCustomer().retrieve(request, options)
+
+print(subscription.read().decode('utf-8'))
diff --git a/samples/subscriptions/subscription_customer_update.py b/samples/subscriptions/subscription_customer_update.py
new file mode 100644
index 0000000..53aa4e3
--- /dev/null
+++ b/samples/subscriptions/subscription_customer_update.py
@@ -0,0 +1,35 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+request = {
+    "customerReferenceCode": "994cbfca-2858-42cb-b2f0-5cc81b1f658c",
+    "name": "John",
+    "surname": "Doe",
+    "email": "email@gmail.com",
+    "gsmNumber": "+905554443333",
+    "identityNumber": "11111111111",
+    "billingAddress": {
+        "address": "address1",
+        "zipCode": "34940",
+        "contactName": "John Doe",
+        "city": "Istanbul",
+        "district": "District",
+        "country": "Turkey"
+    },
+    "shippingAddress": {
+        "address": "address",
+        "zipCode": "34940",
+        "contactName": "John Doe",
+        "city": "Istanbul",
+        "country": "Turkey"
+    }
+}
+
+subscription = iyzipay.SubscriptionCustomer().update(request, options)
+
+print(subscription.read().decode('utf-8'))
diff --git a/samples/subscriptions/subscription_initialize.py b/samples/subscriptions/subscription_initialize.py
new file mode 100644
index 0000000..4651e7d
--- /dev/null
+++ b/samples/subscriptions/subscription_initialize.py
@@ -0,0 +1,45 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+request = {
+    "locale": "tr",
+    "pricingPlanReferenceCode": "36fcd8e3-f99b-4b19-9dc4-f7c30d7f0cd4",
+    "conversationId": "conv-1001",
+    "subscriptionInitialStatus": "ACTIVE",
+    "customer": {
+        "name": "John",
+        "surname": "Stone",
+        "email": "john@gmail.com",
+        "gsmNumber": "+905545545512",
+        "identityNumber": "1234567890",
+        "billingAddress": {
+            "address": "Altunizade Mah. İnci Çıkmazı Sokak No: 3 İç Kapı No: 10 Üsküdar İstanbul",
+            "contactName": "contactName",
+            "city": "Istanbul",
+            "country": "Türkiye"
+        },
+        "shippingAddress": {
+            "address": "address",
+            "zipCode": "zipCode",
+            "contactName": "contactName",
+            "city": "city",
+            "country": "country"
+        }
+    },
+    "paymentCard": {
+        "cardHolderName": "John Doe",
+        "cardNumber": "5528790000000008",
+        "expireMonth": "12",
+        "expireYear": "2030",
+        "cvc": "123"
+    }
+}
+
+subscription = iyzipay.Subscription().initialize(request, options)
+
+print(subscription.read().decode('utf-8'))
diff --git a/samples/subscriptions/subscription_initialize_for_customer.py b/samples/subscriptions/subscription_initialize_for_customer.py
new file mode 100644
index 0000000..0ad2f38
--- /dev/null
+++ b/samples/subscriptions/subscription_initialize_for_customer.py
@@ -0,0 +1,17 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+request = {
+    'subscriptionInitialStatus': 'ACTIVE',
+    'pricingPlanReferenceCode': '36fcd8e3-f99b-4b19-9dc4-f7c30d7f0cd4',
+    'customerReferenceCode': 'c9fba719-bf17-45fa-9cc7-8fbb70321023'
+}
+
+subscription = iyzipay.Subscription().initialize_with_customer(request, options)
+
+print(subscription.read().decode('utf-8'))
diff --git a/samples/subscriptions/subscription_list.py b/samples/subscriptions/subscription_list.py
new file mode 100644
index 0000000..d188470
--- /dev/null
+++ b/samples/subscriptions/subscription_list.py
@@ -0,0 +1,22 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+request = {
+    "page": "1",
+    "count": "10",
+    "subscriptionStatus": "ACTIVE",
+    "subscriptionReferenceCode": "c8ab43da-f4b3-40d2-b1ef-620da93ece9",
+    "customerReferenceCode": "566b2e1a-5046-4438-9b62-c8cf761f6d1",
+    "pricingPlanReferenceCode": "c1d489b6-9adc-42fa-88ae-47ea2e5db1e",
+    "parentReferenceCode": "f219267d-ce05-4039-a773-225ea44aad1",
+    "startDate": "2026-01-01 08:00:00",
+    "endDate": "2025-08-24 20:00:00",
+}
+subscription_list = iyzipay.Subscription().list(request, options)
+
+print(subscription_list.read().decode('utf-8'))
diff --git a/samples/subscriptions/subscription_pricing_plan_create.py b/samples/subscriptions/subscription_pricing_plan_create.py
new file mode 100644
index 0000000..36041fe
--- /dev/null
+++ b/samples/subscriptions/subscription_pricing_plan_create.py
@@ -0,0 +1,25 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+pricing_plan = {
+    'locale': 'tr',
+    'conversationId': 'conv-001',
+    'name': 'Aylık Plan',
+    'recurrenceCount': 12,
+    'planPaymentType': 'RECURRING',
+    'trialPeriodDays': 0,
+    'paymentIntervalCount': 1,
+    'paymentInterval': 'MONTHLY',
+    'currencyCode': 'TRY',
+    'price': 99.99,
+    'product_reference_code': 'fe7b7a27-4192-45da-964e-7a5934b3a6ef'
+}
+
+subscription_pricing_plan = iyzipay.SubscriptionPricingPlan().create(pricing_plan, options)
+
+print(subscription_pricing_plan.read().decode('utf-8'))
diff --git a/samples/subscriptions/subscription_pricing_plan_delete.py b/samples/subscriptions/subscription_pricing_plan_delete.py
new file mode 100644
index 0000000..f9b4830
--- /dev/null
+++ b/samples/subscriptions/subscription_pricing_plan_delete.py
@@ -0,0 +1,15 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+request = {
+    'pricing_plan_reference_code': 'e0b8e566-5c6c-430f-8b6e-281c44215bbf'
+}
+
+subscription_pricing_plan_delete = iyzipay.SubscriptionPricingPlan().delete(request, options)
+
+print(subscription_pricing_plan_delete.read().decode('utf-8'))
diff --git a/samples/subscriptions/subscription_pricing_plan_list.py b/samples/subscriptions/subscription_pricing_plan_list.py
new file mode 100644
index 0000000..6c634fd
--- /dev/null
+++ b/samples/subscriptions/subscription_pricing_plan_list.py
@@ -0,0 +1,19 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+request = {
+    'locale': 'tr',
+    'conversationId': '123456789',
+    'page': 1,
+    'count': 10,
+    'product_reference_code': 'fe7b7a27-4192-45da-964e-7a5934b3a6ef'
+}
+
+subscription_pricing_plan_list = iyzipay.SubscriptionPricingPlan().list(request, options)
+
+print(subscription_pricing_plan_list.read().decode('utf-8'))
diff --git a/samples/subscriptions/subscription_pricing_plan_retrieve.py b/samples/subscriptions/subscription_pricing_plan_retrieve.py
new file mode 100644
index 0000000..17f66a4
--- /dev/null
+++ b/samples/subscriptions/subscription_pricing_plan_retrieve.py
@@ -0,0 +1,15 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+request = {
+    'pricing_plan_reference_code': 'e0b8e566-5c6c-430f-8b6e-281c44215bbf'
+}
+
+subscription_pricing_plan = iyzipay.SubscriptionPricingPlan().retrieve(request, options)
+
+print(subscription_pricing_plan.read().decode('utf-8'))
diff --git a/samples/subscriptions/subscription_pricing_plan_update.py b/samples/subscriptions/subscription_pricing_plan_update.py
new file mode 100644
index 0000000..a473111
--- /dev/null
+++ b/samples/subscriptions/subscription_pricing_plan_update.py
@@ -0,0 +1,17 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+request = {
+    'name': 'Aylık Yeni Plan',
+    'trialPeriodDays': 5,
+    'pricing_plan_reference_code': 'e0b8e566-5c6c-430f-8b6e-281c44215bbf'
+}
+
+subscription_pricing_plan = iyzipay.SubscriptionPricingPlan().update(request, options)
+
+print(subscription_pricing_plan.read().decode('utf-8'))
diff --git a/samples/subscriptions/subscription_product_create.py b/samples/subscriptions/subscription_product_create.py
new file mode 100644
index 0000000..8fc0a8a
--- /dev/null
+++ b/samples/subscriptions/subscription_product_create.py
@@ -0,0 +1,18 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+product = {
+    'locale': 'tr',
+    'conversationId': '123456789',
+    'name': 'Coffee Pack',
+    'description': 'Turkish Coffee'
+}
+
+subscription_product = iyzipay.SubscriptionProduct().create(product, options)
+
+print(subscription_product.read().decode('utf-8'))
diff --git a/samples/subscriptions/subscription_product_delete.py b/samples/subscriptions/subscription_product_delete.py
new file mode 100644
index 0000000..71f03e3
--- /dev/null
+++ b/samples/subscriptions/subscription_product_delete.py
@@ -0,0 +1,15 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+request = {
+    'product_reference_code': '9f7cbae3-bb85-4649-981c-707ac034ca4d'
+}
+
+subscription_product_delete = iyzipay.SubscriptionProduct().delete(request, options)
+
+print(subscription_product_delete.read().decode('utf-8'))
diff --git a/samples/subscriptions/subscription_product_list.py b/samples/subscriptions/subscription_product_list.py
new file mode 100644
index 0000000..1e67bc4
--- /dev/null
+++ b/samples/subscriptions/subscription_product_list.py
@@ -0,0 +1,11 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+subscription_product = iyzipay.SubscriptionProduct().list(options)
+
+print(subscription_product.read().decode('utf-8'))
diff --git a/samples/subscriptions/subscription_product_retrieve.py b/samples/subscriptions/subscription_product_retrieve.py
new file mode 100644
index 0000000..6f336a3
--- /dev/null
+++ b/samples/subscriptions/subscription_product_retrieve.py
@@ -0,0 +1,15 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+request = {
+    'product_reference_code': '9f7cbae3-bb85-4649-981c-707ac034ca4d'
+}
+
+subscription_product = iyzipay.SubscriptionProduct().retrieve(request, options)
+
+print(subscription_product.read().decode('utf-8'))
diff --git a/samples/subscriptions/subscription_product_update.py b/samples/subscriptions/subscription_product_update.py
new file mode 100644
index 0000000..b1faa65
--- /dev/null
+++ b/samples/subscriptions/subscription_product_update.py
@@ -0,0 +1,19 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+product = {
+    'locale': 'tr',
+    'conversationId': '123456789',
+    'name': 'New Coffee Pack',
+    'description': 'Delicious Turkish Coffee',
+    'product_reference_code': 'fdb7bc8b-c7a7-44a0-a143-1ce3a6aaeb41'
+}
+
+subscription_product = iyzipay.SubscriptionProduct().update(product, options)
+
+print(subscription_product.read().decode('utf-8'))
diff --git a/samples/subscriptions/subscription_retrieve.py b/samples/subscriptions/subscription_retrieve.py
new file mode 100644
index 0000000..5e9e3d5
--- /dev/null
+++ b/samples/subscriptions/subscription_retrieve.py
@@ -0,0 +1,12 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+
+subscription_list = iyzipay.Subscription().retrieve(options)
+
+print(subscription_list.read().decode('utf-8'))
diff --git a/samples/subscriptions/subscription_retry.py b/samples/subscriptions/subscription_retry.py
new file mode 100644
index 0000000..62029c5
--- /dev/null
+++ b/samples/subscriptions/subscription_retry.py
@@ -0,0 +1,15 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+request = {
+    "referenceCode": "a2077643-bab7-4b73-85a5-7676c78d7c66"
+}
+
+subscription = iyzipay.Subscription().retry(request, options)
+
+print(subscription.read().decode('utf-8'))
diff --git a/samples/subscriptions/subscription_upgrade.py b/samples/subscriptions/subscription_upgrade.py
new file mode 100644
index 0000000..983bd84
--- /dev/null
+++ b/samples/subscriptions/subscription_upgrade.py
@@ -0,0 +1,19 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+request = {
+    "subscriptionReferenceCode": "a2077643-bab7-4b73-85a5-7676c78d7c66",
+    "newPricingPlanReferenceCode": "dbffa857-40f5-48d1-9179-e9326ffb942d",
+    "upgradePeriod": "NEXT_PERIOD",
+    "useTrial": False,
+    "resetRecurrenceCount": True
+}
+
+subscription = iyzipay.Subscription().upgrade(request, options)
+
+print(subscription.read().decode('utf-8'))
diff --git a/samples/update_sub_merchant_item.py b/samples/update_sub_merchant_item.py
new file mode 100644
index 0000000..47877d3
--- /dev/null
+++ b/samples/update_sub_merchant_item.py
@@ -0,0 +1,19 @@
+import iyzipay
+
+options = {
+    'api_key': iyzipay.api_key,
+    'secret_key': iyzipay.secret_key,
+    'base_url': iyzipay.base_url
+}
+
+request = {
+    "locale": "tr",
+    "conversationId": "123456789",
+    "paymentTransactionId": "20947104",
+    "subMerchantKey": "favC6OGPAVHb97HwXG5GPKd4KuE=",
+    "subMerchantPrice": "11.0"
+}
+
+sub_merchant_item = iyzipay.SubMerchant().update_item(request, options)
+
+print(sub_merchant_item.read().decode('utf-8'))
diff --git a/setup.py b/setup.py
index d315e4f..b1d4816 100755
--- a/setup.py
+++ b/setup.py
@@ -34,13 +34,11 @@
         "License :: OSI Approved :: MIT License",
         "Operating System :: OS Independent",
         "Programming Language :: Python",
-        "Programming Language :: Python :: 3.6",
-        "Programming Language :: Python :: 3.7",
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",
+        "Programming Language :: Python :: 3.13",
         "Programming Language :: Python :: Implementation :: PyPy",
         "Topic :: Software Development :: Libraries :: Python Modules",
     ],