Add Klarna Adapter #59
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Einswilli
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Einswilli
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Thanks for contributoins!
easyswitch/integrators/klarna.py
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| def validate_credentials(self) -> bool: | ||
| """Validate Klarna API credentials.""" | ||
| return bool(self.config.api_key and getattr(self.config, "api_username", None)) |
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i think api_username must be in the extra attr.
self.config here is an instance of ProviderConfig so it'd be better to have api_username and other aggregator specific config attrs in extra...
easyswitch/integrators/klarna.py
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| """Validate Klarna webhook signature (if provided).""" | ||
| # Klarna allows optional signature validation via HMAC | ||
| signature = headers.get("klarna-signature") | ||
| secret = getattr(self.config, "webhook_secret", None) |
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Put webhook_secret in self.contiig.extra.
| "locale": "en-SE", | ||
| "order_amount": int(transaction.amount * 100), | ||
| "order_tax_amount": 0, | ||
| "order_lines": [ |
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Plase can you explain this section to me??? :-)
easyswitch/integrators/klarna.py
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| } | ||
| ], | ||
| "merchant_urls": { | ||
| "confirmation": transaction.callback_url or "https://example.com/confirm", |
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use transaction.callback_url or self.config.callback_url.
easyswitch/integrators/klarna.py
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| transaction_id=data.get("session_id"), | ||
| reference=transaction.reference, | ||
| provider=self.provider_name(), | ||
| status=TransactionStatus.PENDING.value, |
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No need unnecessary .value here.
easyswitch/integrators/klarna.py
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| raw_response=data, | ||
| ) | ||
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| async def cancel_transaction(self, transaction_id: str) -> None: |
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cancel_transaction must return a boolean.
| @pytest.fixture | ||
| def klarna_config(): | ||
| return { | ||
| "api_username": "test_user", |
| "api_username": "test_user", | ||
| "api_key": "test_key", | ||
| "environment": "sandbox", | ||
| "webhook_secret": "secret123", |
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I think you'll need to refractor tests based on the adapter changes...
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I have done the changes, please check once |
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Hey @Einswilli Can you please accept the pr, if the changes are correct? |
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Hi @Sakshi146-eng can you please provide a screenshot of the tests??? |
2 participants
Klarna Payment Adapter Integration
This PR introduces a new payment adapter for Klarna, enabling global “Pay Later” and “Pay Now” transactions via the EasySwitch SDK.
Addresses issue #58
✨ What's New
New Adapter:
KlarnaIntegratorfollowing the EasySwitchBaseAdapterinterfaceGlobal Support: Integration with Klarna’s REST API covering EU, US, and APAC regions
Flexible Payment Options: Supports deferred, installment, and direct payment methods
HMAC Webhook Security: Validates all incoming webhook signatures securely
Comprehensive Unit Tests & Documentation: Ensures full coverage and integration clarity
🌍 Supported Regions & Currencies
🔒 Webhook Security
Uses HMAC-SHA256 with the configured
webhook_secretValidates signature through
validate_webhook()Parses payload and normalizes status via
parse_webhook()Raises
PaymentErrorfor invalid or tampered webhooks🏗️ Architecture
Inherits from
BaseAdapterImplements all core abstract methods:
send_payment()check_status()refund()cancel_transaction()get_transaction_detail()Registered via
@AdaptersRegistry.register("klarna")Returns unified response types (
TransactionResult,WebhookEvent)Consistent exception handling through
PaymentError🧪 Tests
Unit Tests:
tests/test_klarna.pyCoverage includes:
Credential validation
Header generation (Base64 Auth)
Webhook parsing and signature validation
Transaction formatting and sending
Error handling for failed requests
Run with:
🚫 Unsupported / Not Implemented
❌ Partial refund operations (currently under evaluation)
❌ Currency conversion between unsupported Klarna markets