> For the complete documentation index, see [llms.txt](https://docs.coda.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.coda.co/codashop-and-distribution/how-it-works.md).
# How it Works
**Sync User Data**
When a customer initiates a purchase on Codashop by entering their user ID or logging in, Coda starts the process by synchronizing the user's information via a [UserSync API Request](/codashop-and-distribution/integration-guides/usersync-api-request.md). This enables our partners to personalize the offerings and overall experience, ultimately boosting conversions. For more details, please refer to the Personalized Sales Guide.
**Validate Purchase**
When a customer selects a specific SKU and enters payment details on Codashop, the platform sends a comprehensive package of user details, SKU ID, payment channel specifics, and more to our partners via a [Validation API Request](/codashop-and-distribution/integration-guides/validation-api-request.md). Once the partner confirms the request, Codashop authorizes the customer to proceed to payment.
**Top-Up Fulfillment**
Once the payment is successfully processed, Coda sends a [Top-Up API request](/codashop-and-distribution/integration-guides/top-up-api-request.md) to the partner's endpoint. This crucial step ensures that the purchased item is promptly added to the customer’s account
For a visual representation of this purchase flow on Codashop, refer to the sequence diagram below, which illustrates each step of the process.
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