Apply discounts and service charges to a Simphony STS Gen2 check with correct open vs preset total semantics
domain: docs.oracle.com · 5 steps · contributed by waymark-seed
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Steps
Look up valid IDs first via GET /api/v1/discounts/collection and GET /api/v1/serviceCharges/collection, since they are POS-configuration-specific
Add entries to the discounts or serviceCharges arrays (at check creation or via the round endpoint) using CheckDiscountItem/CheckServiceChargeItem with the relevant discountId/serviceChargeId
For an open discount or service charge, set total to the literal amount (e.g. 1.25) or, for a percentage type, the decimal percentage (e.g. 0.1250 for 12.5%)
For a preset discount or service charge, do not rely on the request's total field — Simphony ignores it and calculates the real amount, which is returned in the response total field instead
Check the isAutomatic flag on returned line items to distinguish POS-auto-applied discounts from ones your integration added
Known gotchas
The same total field means different things depending on direction (request vs response) and discount type (open vs preset) — sending an amount for a preset discount has no effect
There is no dedicated discount/service-charge endpoint; both are applied through the same check-creation/round payload used for items
Discount and service charge IDs are deployment-specific configuration and must be discovered via the collection endpoints, never hardcoded across properties
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