post
https://{project_url}/webservice/rest-api/{api_interface}/{version}/purchases/actions/recommended-best-rewards
Method returns all rewards available for a specific client application (e-commerce, POS, etc.).
The response includes all rewards that are valid at the time of the request. For each reward, a parameter defines the maximum usage per purchase.
If the value of this parameter is zero, the reward cannot be applied.
Rewards are always associated with products via bill items.