Why Idempotency Matters in iGaming APIs
The industry’s modern platforms receive millions of API requests every day from affiliate platforms to process registrations, payments, and more.
However, there are instances when the API requests arrive twice due to network problems or other issues.
The duplicate API requests can result in duplicate entries for affiliate commissions and players, incorrect reports, and incorrect data regarding player financial activity.
Engineering teams can avoid these issues by implementing idempotency into their APIs. This will ensure that their platforms are both reliable and protect the integrity of the players’ data.
What Is Idempotency?
Idempotency ensures that if a request is made twice, the outcome of the request is the same as if it had only been made once.
If there are duplicate affiliate conversion requests, for example, idempotency will ensure only one record is created.
Idempotency ensures that a system remains consistent regardless of network issues between software platforms.
Why Duplicate API Requests Happen
Duplicate API requests are much more common than many software engineers would like to admit.
API requests can become duplicated for a variety of reasons, including:
Timeout errors on the API
Requests sent by clients twice
Webhooks sent more than once
Server errors
Load balancer issues
All of these can happen on any deployed API system.
Protecting Affiliate Commission Tracking
Affiliate platforms often receive requests from multiple third-party partners.
Without proper request validation, this could result in duplicate commissions being assigned to the affiliate, incorrect balances in their payment system, incorrect reporting software, and more.
Request validation will protect the affiliate platforms and their financial systems from discrepancies in the recorded data.
Improve Payment Processing
The world of iGaming involves a lot of money changing hands.
Duplicate API requests in the payment system could mean that money is transferred twice, leading to financial issues for both the platforms and the players.
By placing idempotency into these APIs, the information will remain accurate and reliable.
Simplify Webhook Handling
Third-party software will often send webhooks to announce specific events on the API.
These webhooks are sent until the API returns an acknowledgment of the request.
Therefore, engineers must allow webhooks to be sent multiple times.
Examples of the information sent in these webhooks may include:
Confirmation of player deposits
Registration of new players
Updates to gaming campaign data
Fraud alerts
All of these can occur multiple times during the operation of an iGaming platform.
Generating Unique Request Keys
One of the most common methods of ensuring idempotency is through the use of unique keys for each request.
These keys allow the API to recognize if a request has already been processed.
If the request has already been processed, the request is automatically discarded. This ensures no duplicate API requests are processed for the same task.
Improve Distributed Systems
The majority of iGaming platforms use distributed systems made up of numerous microservices to handle requests.
By using idempotent APIs for these distributed systems, errors in communication between services will not result in duplicated requests being made.
Engineers can take this further by implementing retries between the distributed systems. Idempotent APIs make this possible.
This will improve the reliability of the distributed systems.
Strengthen User Experience
Currently, users must be concerned about accidentally performing an action twice on the gaming platform.
Idempotency will make sure this does not happen.
It can prevent the issues of:
Creating duplicate registrations for users
Selling the same product twice
Performing the same action twice
Reporting errors performing the same action twice
A good user experience is ensured by implementing idempotency.
Monitor Duplicate API Requests
Monitoring duplicate API requests will allow engineers to understand how often these requests happen on the system.
Tracking these statistics will allow engineers to monitor the following stats:
Number of failed API requests (often the cause of duplicate requests)
Number of duplicate requests
Number of processed idempotency keys
Number of failed validations of requests
Number of API requests made with a certain timeout
These statistics will allow engineers to identify any issues with the APIs before they impact the production environment.
Design Clear API Documentation
Any developer that integrates with the iGaming API must understand how the API handles duplicate requests.
The API documentation should include information about:
Which API endpoints support idempotency
What request headers are required
For how long will the idempotency key be valid
How often should developers retry their requests
This will ensure developers do not have to contact the engineers should they encounter an issue with the API.
AI Can Improve API Request Analysis
Artificial intelligence systems can assist in understanding if the API requests are succeeding or failing.
AI systems can analyze the requests and automatically detect:
Abnormal retry behaviors from different developers or third-party services
Duplicate requests from specific sources
Possible infrastructure failures
Need for adjustments in API request timeouts
Anomalies in API requests
Having this information available to engineers will allow them to better manage the API requests and improve them.
Common Engineering Mistakes
Many iGaming platforms have errors in their API requests that create the same issues as duplicate requests.
Common engineering mistakes include:
Not considering how requests might be retried
Using non-unique request identifiers
Processing webhooks that have already been processed
Not validating requests from third-party services
Not monitoring the APIs for duplicate requests
By addressing these weaknesses in the current API infrastructure, engineering teams can significantly improve the platform’s functionality.
Best Practices
To build reliable APIs that handle many iGaming platform functions without issues due to duplicate requests, developers and engineers should follow these best practices:
Ensure that each request has a unique request key
Store records of which requests have already been processed
Ensure that failed requests can be automatically retried
Validate webhooks before taking any action regarding them
Monitor the API for duplicate requests
Include documentation of API requirements
Include tests to handle failed requests
Regularly review the API request logs
These will significantly improve the software’s reliability.
Looking Ahead
With the industry moving towards distributed systems, the importance of idempotency for APIs will only grow in the future.
Future innovations will include the following:
Automated retry management between distributed systems
Better request deduplication algorithms
AI-assisted validation of API requests
Self-healing distributed system communication
Better failure recovery between distributed systems
These future technologies will significantly aid the software engineers in creating more reliable distributed systems.
Final Thoughts
Idempotency is one of the most valuable engineering principles that will help create reliable iGaming platforms.
By ensuring that duplicate API requests result in the same outcome as if the request had only been made once, engineering teams can protect the integrity of affiliate platforms’ data and statistics, player data, and financial data for both the platforms and the players.
Idempotency will remain one of the most important aspects of the industry’s software engineering as platforms become even more distributed in the future.