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+```mermaid
+flowchart TB
+    consumer["Consumer App"]
+    marketplace["Marketplace"]
+    pricing["Pricing API"]
+    merchant["Merchant Service<br/>(Through Merchant Caching)"]
+    mongo[(Mongo DB)]
+    cnp["CNP Service"]
+    sales[(Sales Details Table<br/>(Subscriber DB))]
+
+    consumer -->|1. Create Carts with Product & Select payment Method| marketplace
+    marketplace -->|7. Display Transaction Fee Amount| consumer
+
+    marketplace -->|2. Request Fee Details| pricing
+    pricing -->|6. Compute Fee amounts| marketplace
+
+    pricing -->|3. Request Fee Rates based on payment method type & merchant Id| merchant
+    merchant -->|5. Send respective fees| pricing
+    mongo -->|4. Send stored fee rates in merchant collection| merchant
+
+    marketplace -->|8. Send Payment| cnp
+    cnp -->|9. Payment confirmation| marketplace
+
+    marketplace -->|10. Store Platform Fee after checkout| sales
+```