The Payment Service is a crucial component of our system that handles all payment-related operations. It processes payments, manages transactions, and communicates with other services through events. Using an event-driven architecture, it ensures that all actions are asynchronous, decoupled, and scalable.

Core features

Feature	Description
Payment Processing	Processes payments and manages transactions
Event-Driven Architecture	Ensures asynchronous, decoupled, and scalable operations
Integration with Payment Gateways	Interfaces with external payment providers

Messages for this service

Sends messages (2)

Quickly find the message you need by searching for the name, type, or summary.

Events (1)Queries (1)

Name	Version	Type	Summary
Payment Processed	v0.0.1	event	Event is triggered after the payment has been successfully processed
Get order details	v0.0.1	query	GET request that will return detailed information about a specific order, identified by its orderId.

Receives messages (4)

Quickly find the message you need by searching for the name, type, or summary.

Events (3)Queries (1)

Name	Version	Type	Summary
Payment Initiated	v0.0.1	event	Event is triggered when a user initiates a payment through the Payment Service
User subscription started	v0.0.1	event	An event that is triggered when a new user subscription has started
Inventory adjusted	v1.0.1	event	Indicates a change in inventory level
Get payment status	v0.0.1	query	GET request that will return the payment status for a specific order, identified by its orderId.

Infrastructure

The Payment Service is hosted on AWS.

The diagram below shows the infrastructure of the Payment Service. The service is hosted on AWS and uses AWS Lambda to handle the payment requests. The payment is stored in an AWS Aurora database and the payment metadata is stored in an AWS S3 bucket.

You can find more information about the Payment Service infrastructure in the Payment Service documentation.

Key Components

• Payment API: Exposes endpoints for initiating payments and querying payment status.
• Payment Processor: Handles the core payment processing logic.
• Event Bus: Manages the communication between services using events.
• Payment Gateway: Interfaces with external payment providers.
• Transaction Service: Manages transaction records and states.
• Notification Service: Sends notifications related to payment status changes.
• Database: Stores transaction data and payment status.