Marketplace merchandisers run promotions in a dozen seller consoles at once — a Prime-Day lightning deal here, a percent-off coupon there, a storewide banner sale somewhere else — and none of it lives in Odoo. The result is double-discounting on the same SKU, deals that quietly sink below cost, oversold flash-sale inventory, and a spreadsheet reconciliation every Monday to guess whether any of it actually worked. Odoo's native promotions (loyalty.program, loyalty.rule, loyalty.reward in the Sales/eCommerce coupon engine) are excellent for your own webshop, but they have no concept of an external channel, no scheduled push to Amazon Seller Central or the eBay/Walmart promotion APIs, no margin floor enforced across channels, and no per-channel uplift reporting. That is exactly the gap this module fills.

ECOSIRE builds a dedicated marketplace.promotion model (with marketplace.promotion.line for per-SKU/per-channel targeting) that sits alongside — not on top of — Odoo's coupon engine, so your storefront promotions and your marketplace promotions share one calendar and one product catalog. Each promotion carries channel bindings, a schedule window, discount mechanics (percent, fixed, coupon code, tiered/BOGO), and computed fields such as discounted_price, projected_margin and margin_ok via @api.depends on cost, list price and the discount rule. A margin guardrail record rule and a server-side constraint block any line that would breach the configured floor, so no lightning deal ever ships below the number you set. Channel adapters (Amazon SP-API, eBay Marketing/Promotions API, Walmart Promotions API) run as queued automated actions that create, activate, pause and expire deals where each marketplace's API allows it, and write back the external promotion ID, live status and any rejection reason onto the promotion line for full auditability. For lightning deals and flash sales, the module schedules the activation window and places a soft inventory hold (a reserved quantity tracked against stock.quant availability) so a flash sale cannot oversell your on-hand stock.

Reporting closes the loop. The module snapshots baseline sales velocity before each promotion window and compares it to in-window and post-window performance, surfacing uplift percentage, incremental units, realized discount cost and effective margin per channel in a pivot/graph view plus a QWeb PDF wrap-up report your merchandising lead can circulate. Everything is exposed over Odoo's XML-RPC/JSON-RPC API and secured with ir.model.access.csv plus record rules so channel managers only see their own marketplaces. It targets Odoo 17.0, 18.0 and 19.0, works on Community or Enterprise (marketplace connectors and outbound API calls are pure Python/requests, so no Enterprise dependency is forced), and is packaged as a clean, versioned module with a proper __manifest__.py, OWL/XML views and automated tests.

Because this is build-to-order, we start from your actual channel mix and promotion playbook, not a generic template. After a scoping call we confirm which marketplaces you sell on, which of their promotion APIs are in scope, your margin floors and approval workflow, then build, test on a staging database against sandbox/seller credentials, and hand over installable source with a git repository and documentation. Typical delivery is one working week from confirmed scope depending on how many channel adapters and mechanics you need — there is no instant download; ECOSIRE builds, installs and supports it for you.