feat: added tpv app

2024-03-22 00:44:49 +01:00
parent a13eb6c9d9
commit b8562b3d7b
27 changed files with 1153 additions and 7 deletions
@@ -0,0 +1,105 @@
+import base64
+import json
+
+from django.conf import settings
+from django.urls import reverse
+from tpv.models import PaymentTPV
+from tpv.utils import compute_signature
+
+
+class TransactionTypes:
+    AUTHORIZATION = 0
+    PREAUTHORIZATION = 1
+    REPLACEMENT_PREAUTHORIZATION = 11
+    CONFIRMATION = 2
+    REFUND = 3
+    SEPARATED_CONFIRMATION = 8
+    CANCELED = 9
+    PAYGOLD = 15
+    PUCE_AUTHENTICATION = 17
+    REFUND_WITHOUT_ORIGINAL = 34
+    BET_PRICE = 37
+    PAYMENT_CANCELED = 45
+    REFUND_CANCELED = 46
+    SEPARATED_CONFIRMATION_CANCELED = 47
+    LINK_EXPIRATION_CHANGED_FOR_PAYGOLD = 51
+
+
+class RedsysClient:
+    DEBUG_ENVIRONMENT_URL = "https://sis-t.redsys.es:25443/sis/realizarPago"
+    PROD_ENVIRONMENT_URL = ""
+
+    def get_target_url(self):
+        if settings.DEBUG:
+            return self.DEBUG_ENVIRONMENT_URL
+        return self.PROD_ENVIRONMENT_URL
+
+    def get_merchant_code(self) -> str:
+        return settings.REDSYS_MERCHANT_CODE
+
+    def get_terminal(self) -> str:
+        return settings.REDSYS_TERMINAL
+
+    def get_currency_code(self) -> str:
+        return settings.REDSYS_CURRENCY_CODE
+
+    def get_merchant_url_ok_for_order(self, order: PaymentTPV) -> str:
+        path = reverse("tpv:ok", kwargs={"order": order.hash})
+        return f"{settings.REDSYS_TPV_DOMAIN}{path}"
+
+    def get_merchant_url_ko_for_order(self, order: PaymentTPV) -> str:
+        path = reverse("tpv:ko", kwargs={"order": order.hash})
+        return f"{settings.REDSYS_TPV_DOMAIN}{path}"
+
+    def get_webhook_url_for_order(self, order: PaymentTPV) -> str:
+        path = reverse("tpv:webhook", kwargs={"order": order.hash})
+        return f"{settings.REDSYS_TPV_DOMAIN}{path}"
+
+    def get_shared_secret(self) -> str:
+        return settings.REDSYS_SHARED_SECRET
+
+    def get_signature(self, hash, payload: str):
+        key = self.get_shared_secret()
+        return compute_signature(str(hash), payload, key).decode()
+
+    def get_merchant_parameters_for_order(
+        self, order: PaymentTPV, transaction_type: int = TransactionTypes.AUTHORIZATION
+    ) -> dict:
+        merchant_code = self.get_merchant_code()
+
+        return {
+            "DS_MERCHANT_AMOUNT": str(order.amount_integer),
+            "DS_MERCHANT_CURRENCY": self.get_currency_code(),
+            "DS_MERCHANT_MERCHANTCODE": merchant_code,
+            "DS_MERCHANT_MERCHANTURL": self.get_webhook_url_for_order(order),  # Webhook
+            "DS_MERCHANT_ORDER": order.hash.hex,
+            "DS_MERCHANT_TERMINAL": self.get_terminal(),
+            "DS_MERCHANT_TRANSACTIONTYPE": transaction_type,
+            "DS_MERCHANT_URLKO": self.get_merchant_url_ko_for_order(
+                order
+            ),  # Página informativa al usuario - Pago erróneo
+            "DS_MERCHANT_URLOK": self.get_merchant_url_ok_for_order(
+                order
+            ),  # Página informativa al usuario - Pago confirmado
+        }
+
+    def get_encoded_merchant_parameters_for_order(
+        self, order: PaymentTPV, transaction_type: int = TransactionTypes.AUTHORIZATION
+    ) -> str:
+        body = self.get_merchant_parameters_for_order(order, transaction_type)
+        stringified_body = json.dumps(body)
+        return base64.b64encode(stringified_body.encode()).decode("utf-8")
+
+    def get_body_for_order(
+        self, order: PaymentTPV, transaction_type: int = TransactionTypes.AUTHORIZATION
+    ) -> dict:
+        merchant_parameters = self.get_encoded_merchant_parameters_for_order(
+            order, transaction_type
+        )
+        signature = self.get_signature(order.hash.hex, merchant_parameters)
+
+        return {
+            "Ds_MerchantParameters": merchant_parameters,
+            "Ds_SignatureVersion": "HMAC_SHA256_V1",
+            "Ds_Signature": signature,
+        }