> For the complete documentation index, see [llms.txt](https://apidocs.akinon.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://apidocs.akinon.com/commerce-openapis/checkout/masterpass-payment/apply-selected-reward-amounts-to-the-masterpass-rest-order.md). # Apply selected reward amounts to the Masterpass REST order Accepts the user's reward amount selections and stores them in `pre_order.selected_rewards`. The request body is dynamic — each field name corresponds to a `RewardType` value present in the `rewards` list returned by `MasterpassRestRewardListPage`. Each value is a decimal amount the user chooses to apply, between `0` and the maximum available for that type. This is an **independent** page — submitting it does not advance the main checkout flow. **Dynamic Fields**: * One field per reward type (e.g., `general`, `special`). * Field type: decimal with up to 12 digits and 2 decimal places. * Minimum value: `0` * Maximum value: the `amount` value for that reward type from the pre-order state. **Validation**: * The sum of all selected reward amounts must not exceed the order total (`pre_order.get_total_amount_with_interest()`). If it does, a validation error is returned: `"Selected reward amount cannot be higher than total amount."`. **State Update**: * On success, `pre_order.selected_rewards` is populated with the chosen amounts keyed by `RewardType` enum values. **Backward Navigation**: * When navigating backward, `pre_order.selected_rewards` is reset to `null`. **Next Pages**: * No further checkout page (`EmptyPage`) ```json {"openapi":"3.1.0","info":{"title":"Overview","version":"1.0.0"},"tags":[{"name":"Masterpass Payment","description":"# Checkout Masterpass Payment\n\nIntegrate the Masterpass digital wallet into your checkout. The flow covers both the standard Masterpass integration and the Masterpass REST variant, including BIN lookup, installment selection, order number assignment, remote installment options, reward selection, and payment completion.\n\n## Authentication\n\nThese endpoints support both authenticated and anonymous sessions.\n\n- **Authenticated users**: Session cookie (`sessionid`) tracks checkout progress.\n- **Anonymous users**: Guest checkout is available when the `CAN_GUEST_PURCHASE` setting is enabled.\n## Request Format\n\nInclude the following header in all checkout requests:\n\n- **x-requested-with**: `XMLHttpRequest`\n\n## Dynamic Settings\n\nThe following settings are managed at runtime through the admin interface and do not require a server restart.\n\n### THREE_D_SECURE_ENABLED\nMaster switch for 3D Secure verification. When disabled, 3D Secure is skipped regardless of other rules.\n\n### THREE_D_SECURE_RULES\nRule-based conditions that determine when 3D Secure is required. When enabled, an amount-based rule is available specifically for Masterpass transactions.\n\n### INSTALLMENT_FILTERS\nFilters that restrict which installment options are presented. Applied during both standard and REST installment selection.\n\n## Static Settings\n\nThe following settings are configured in the server environment and require a restart to take effect.\n\n### DEFAULT_CARD_SLUG\nFallback card identifier used when a BIN number lookup returns no match. Defaults to `other`."}],"servers":[{"description":"Akinon Checkout API","url":"https://{commerce_url}","variables":{"commerce_url":{"default":"sandbox.akinon.com"}}}],"paths":{"/orders/checkout/?page=MasterpassRestRewardSelectionPage":{"post":{"tags":["Masterpass Payment"],"operationId":"submitMasterpassRestRewardSelectionPage","summary":"Apply selected reward amounts to the Masterpass REST order","description":"Accepts the user's reward amount selections and stores them in\n`pre_order.selected_rewards`. The request body is dynamic — each field\nname corresponds to a `RewardType` value present in the `rewards` list\nreturned by `MasterpassRestRewardListPage`. Each value is a decimal\namount the user chooses to apply, between `0` and the maximum available\nfor that type.\n\nThis is an **independent** page — submitting it does not advance the\nmain checkout flow.\n\n**Dynamic Fields**:\n- One field per reward type (e.g., `general`, `special`).\n- Field type: decimal with up to 12 digits and 2 decimal places.\n- Minimum value: `0`\n- Maximum value: the `amount` value for that reward type from the\n pre-order state.\n\n**Validation**:\n- The sum of all selected reward amounts must not exceed the order\n total (`pre_order.get_total_amount_with_interest()`). If it does, a\n validation error is returned:\n `\"Selected reward amount cannot be higher than total amount.\"`.\n\n**State Update**:\n- On success, `pre_order.selected_rewards` is populated with the chosen\n amounts keyed by `RewardType` enum values.\n\n**Backward Navigation**:\n- When navigating backward, `pre_order.selected_rewards` is reset to\n `null`.\n\n**Next Pages**:\n- No further checkout page (`EmptyPage`)","parameters":[{"$ref":"#/components/parameters/AjaxRequestHeader"},{"$ref":"#/components/parameters/SessionCookieHeader"}],"requestBody":{"required":true,"content":{"application/x-www-form-urlencoded":{"schema":{"$ref":"#/components/schemas/RewardSelectionPageInput"}}}},"responses":{"200":{"description":"Rewards applied or validation error","content":{"application/json":{"schema":{"$ref":"#/components/schemas/CheckoutResponse"}}}}}}}},"components":{"parameters":{"AjaxRequestHeader":{"name":"x-requested-with","in":"header","required":true,"description":"Required header for AJAX requests. 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Between 0 and the maximum available\nfor this type (12 digits, 2 decimal places)."}},"CheckoutResponse":{"type":"object","properties":{"context_list":{"type":"array","items":{"$ref":"#/components/schemas/PageContext"}},"pre_order":{"$ref":"#/components/schemas/PreOrder"},"errors":{"oneOf":[{"type":"object","additionalProperties":{"type":"array","items":{"type":"string"}}},{"type":"null"},{"type":"array","items":{"type":"string"}}]},"template_name":{"type":"string"}}},"PageContext":{"type":"object","properties":{"page_name":{"type":"string","description":"Class name of the page (e.g., \"IndexPage\", \"AddressSelectionPage\")"},"page_slug":{"type":"string","description":"URL-friendly slug for the page"},"page_context":{"type":"object","description":"Page-specific context data","additionalProperties":true}}},"PreOrder":{"type":"object","description":"Pre-order state containing basket, addresses, shipping, payment 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shipping option with calculated amount","properties":{"pk":{"type":"integer"},"name":{"type":"string"},"slug":{"type":"string"},"logo":{"oneOf":[{"type":"string","format":"uri"},{"type":"null"}]},"shipping_amount":{"type":"string","pattern":"^\\d+\\.\\d{2}$"},"description":{"oneOf":[{"type":"string"},{"type":"null"}]},"kwargs":{"type":"object","additionalProperties":true}}},"PaymentOptionDetail":{"type":"object","description":"Detailed payment option with type information","properties":{"pk":{"type":"integer"},"name":{"type":"string"},"slug":{"type":"string"},"payment_type":{"type":"string","enum":["credit_card","funds_transfer","bkm_express","loyalty_money","cash_register","gpay","redirection","stored_card","masterpass","masterpass_rest","credit_payment","pay_later","saved_card","confirmation","b2b","wallet","pay_on_delivery"]},"payment_type_label":{"type":"string"}}},"Installment":{"type":"object","properties":{"pk":{"type":"integer"},"installment_count":{"type":"integer"},"label":{"type":"string"},"price_with_accrued_interest":{"type":"string","pattern":"^\\d+\\.\\d{2}$"},"monthly_price_with_accrued_interest":{"type":"string","pattern":"^\\d+\\.\\d{2}$"}}},"DeliveryOption":{"type":"object","properties":{"pk":{"type":"integer"},"name":{"type":"string"},"delivery_option_type":{"type":"string","enum":["customer","retail_store","pickup_location"]},"is_active":{"type":"boolean"}}},"RetailStore":{"type":"object","properties":{"pk":{"type":"integer"},"name":{"type":"string"},"erp_code":{"type":"string"},"township":{"$ref":"#/components/schemas/Township"},"click_and_collect":{"type":"boolean"},"is_active":{"type":"boolean"}}},"BankAccount":{"type":"object","description":"Bank account for funds transfer payments","properties":{"pk":{"type":"integer"},"bank_name":{"type":"string","description":"Name of the bank"},"account_holder":{"type":"string","description":"Account holder name"},"iban":{"type":"string","description":"International Bank Account Number"},"currency":{"type":"string","description":"Currency code (e.g., \"USD\", \"EUR\", \"TRY\")"},"is_active":{"type":"boolean"}}},"PaymentChoice":{"type":"object","properties":{"value":{"type":"string"},"label":{"type":"string"},"price":{"type":"string","pattern":"^\\d+\\.\\d{2}$"}}},"DataSourceShippingOptionDetail":{"type":"object","description":"Data source shipping option for multi-vendor shipping","properties":{"pk":{"type":"integer"},"shipping_amount":{"type":"string","pattern":"^\\d+\\.\\d{2}$"},"shipping_option_name":{"type":"string"},"shipping_option_logo":{"oneOf":[{"type":"string","format":"uri"},{"type":"null"}]},"data_source":{"type":"object","properties":{"pk":{"type":"integer"},"title":{"type":"string"}}},"description":{"oneOf":[{"type":"string"},{"type":"null"}]}}},"PreOrderAttributeBasedShippingOption":{"type":"object","description":"Attribute-based shipping option selected for a product group","properties":{"pk":{"type":"integer"},"shipping_option_name":{"type":"string"},"shipping_option_logo":{"oneOf":[{"type":"string","format":"uri"},{"type":"null"}]},"shipping_amount":{"type":"string","pattern":"^\\d+\\.\\d{2}$"},"product_ids":{"type":"array","items":{"type":"integer"}},"attribute_value":{"type":"string"},"attribute_key":{"oneOf":[{"type":"array","items":{"type":"string"}},{"type":"null"}]}}}}}} ``` --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://apidocs.akinon.com/commerce-openapis/checkout/masterpass-payment/apply-selected-reward-amounts-to-the-masterpass-rest-order.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. 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