> 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/gift-cards-gift-boxes-and-loyalty/update-the-reserved-amount-of-an-applied-gift-card.md). # Update the reserved amount of an applied gift card Updates the amount for the reservation identified by `card_number_hash`. The balance is read from cache to avoid a gateway round-trip. The new amount is subject to the same caps as the apply step, with one adjustment: the card's current reserved amount is temporarily added back to the unpaid total so the calculation treats it as if the card were not yet applied. 1. Cannot exceed the cached available balance 2. Cannot exceed the unpaid total (including this card's current amount) 3. Cannot push the cumulative gift card total above `GIFT_CARD_CONFIG.max_amount_per_order` After the update, the previously selected payment method is reset so the payment step is re-evaluated. **Cache expiry**: If the cached balance has expired, the reservation is automatically removed. The response returns an error asking the user to re-add the card. **Required Fields**: * `card_number_hash`: Hash identifying the reservation to update (max 255 chars) * `new_amount`: New desired amount (decimal, must be greater than zero) **Validation**: * `new_amount` must be greater than zero * If the final capped amount resolves to zero, a validation error is returned * If `card_number_hash` is not found among the applied cards, a validation error is returned **Next Pages**: * `EmptyPage` ```json {"openapi":"3.1.0","info":{"title":"Overview","version":"1.0.0"},"tags":[{"name":"Gift Cards, Gift Boxes & Loyalty","description":"# Checkout Gift Cards, Gift Boxes & Loyalty\n\nApply supplementary payment methods and gifting options that adjust the order total or add items to the order.\n\n**Gift Cards** let customers apply a pre-loaded card balance to their order. The flow supports OTP verification, multi-card application (when configured), amount adjustment, and removal.\n\n**Gift Boxes** let customers add gift packaging to their order.\n\n**Loyalty Points** let customers redeem accumulated points as a payment contribution.\n\n**Rewards** present available reward options that the customer can apply to the order.\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\n### GIFT_CARD_CONFIG\nConfiguration for the gift card feature:\n- `multi_card_enabled` — allows more than one gift card per order when enabled.\n- `max_amount_per_order` — maximum cumulative gift card amount per order (zero means no cap).\n- `balance_cache_ttl` — duration in seconds that a fetched card balance is cached.\n- `otp_resend_cooldown` — minimum interval in seconds between OTP resend requests.\n- `void_task_countdown` — delay in seconds before unused reservations are voided.\n\n### LOYALTY_MONEY_ENABLED\nMaster switch for the loyalty money payment feature. When disabled, the loyalty money step is not shown.\n\n### MINIMUM_ORDER_AMOUNT\nMinimum order total required after loyalty points are applied. Redemption is capped so the remaining amount does not fall below this threshold.\n\n### CUSTOMER_LOYALTY_CARD_SERVICE\nConfigures the service used to retrieve loyalty point balances and the optional minimum basket amount required before redemption is available."}],"servers":[{"description":"Akinon Checkout API","url":"https://{commerce_url}","variables":{"commerce_url":{"default":"sandbox.akinon.com"}}}],"paths":{"/orders/checkout/?page=GiftCardUpdateAmountPage":{"post":{"tags":["Gift Cards, Gift Boxes & Loyalty"],"operationId":"submitGiftCardUpdateAmountPage","summary":"Update the reserved amount of an applied gift card","description":"Updates the amount for the reservation identified by `card_number_hash`.\nThe balance is read from cache to avoid a gateway round-trip.\n\nThe new amount is subject to the same caps as the apply step, with one\nadjustment: the card's current reserved amount is temporarily added back\nto the unpaid total so the calculation treats it as if the card were not\nyet applied.\n\n1. Cannot exceed the cached available balance\n2. Cannot exceed the unpaid total (including this card's current amount)\n3. Cannot push the cumulative gift card total above\n `GIFT_CARD_CONFIG.max_amount_per_order`\n\nAfter the update, the previously selected payment method is reset so the\npayment step is re-evaluated.\n\n**Cache expiry**: If the cached balance has expired, the reservation is\nautomatically removed. The response returns an error asking the user to\nre-add the card.\n\n**Required Fields**:\n- `card_number_hash`: Hash identifying the reservation to update (max 255 chars)\n- `new_amount`: New desired amount (decimal, must be greater than zero)\n\n**Validation**:\n- `new_amount` must be greater than zero\n- If the final capped amount resolves to zero, a validation error is returned\n- If `card_number_hash` is not found among the applied cards, a validation\n error is returned\n\n**Next Pages**:\n- `EmptyPage`","parameters":[{"$ref":"#/components/parameters/AjaxRequestHeader"},{"$ref":"#/components/parameters/SessionCookieHeader"}],"requestBody":{"required":true,"content":{"application/x-www-form-urlencoded":{"schema":{"$ref":"#/components/schemas/GiftCardUpdateAmountInput"}}}},"responses":{"200":{"description":"Gift card reservation amount updated","content":{"application/json":{"schema":{"$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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Subject to the same cap rules as the apply step,\nadjusted so the card's current reserved amount is treated as if it\nwere not yet applied."}}},"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/gift-cards-gift-boxes-and-loyalty/update-the-reserved-amount-of-an-applied-gift-card.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. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.