**Klarna**(Europe)

Tasks / Implementation Steps

Create Adapter Class

• File: easyswitch/integrators/klarna.py
• Class: KlarnaAdapter(BaseAdapter)
• Register with AdaptersRegistry.

Core Functionalities

• validate_credentials() → Validate Klarna API credentials (username, password, or API key).
• _get_access_token() → Implement authentication using Klarna’s OAuth or Basic Auth API.
• send_payment() → Initiate payment via Klarna’s /payments/v1/authorizations or similar endpoint.
• check_status() → Query payment status using Klarna’s /payments/v1/orders/{order_id} endpoint.
• refund() → Handle full/partial refunds using Klarna’s /payments/v1/orders/{order_id}/captures/{capture_id}/refunds.
• validate_webhook() and parse_webhook() → Validate and parse Klarna webhook events (signature validation and event parsing).

Transaction Normalization

• Map Klarna’s payment states (AUTHORIZED, CAPTURED, CANCELLED, REFUNDED, etc.) to EasySwitch’s TransactionStatus enum.
• Ensure consistent PaymentResponse, TransactionDetail, and TransactionStatusResponse structures.
• Currency & Region Support
• Add supported currencies such as EUR, USD, GBP, SEK, NOK, DKK.
• Define minimum and maximum transaction limits per currency.

Expected Outcome

• KlarnaAdapter integrates seamlessly with the EasySwitch SDK.
• Supports payment, status check, and refund workflows.
• Fully validated and documented according to the EasySwitch adapter pattern.

Can you please assign this task under Hacktoberfest?