Key Features (for every marketplace): Order Sync (pull): cron pulls recent orders, maps customer + lines, resolves products by barcode / stock code / seller code / merchant SKU, creates sale.order with optional auto-confirm. One combined cron fetches all configured marketplaces; a per-order-form button fetches on demand. Product Push: push Odoo products to Trendyol, Hepsiburada and Çiçeksepeti (create/import). n11 stock & price registration per seller code. Per-Category Mandatory-Attribute Mapping with Per-Value Translation: map each category's mandatory attributes once per product across all four marketplaces, then translate each Odoo attribute value to the marketplace category's specific accepted value. Marketplace enum attributes accept a category-specific value (numeric attributeValueId for Trendyol / n11 / Çiçeksepeti, accepted value name for Hepsiburada) and the accepted values differ per category — the per-value map pins the exact value each Odoo value resolves to. The push is blocked with a clear, itemised message listing any required attribute that does not resolve, so listings are never silently rejected by the marketplace. Categories auto-sync their real attribute definitions on push (Hepsiburada base listing fields are excluded — they are filled automatically from the product, not mapped). Variant Management: every push emits one entry PER product variant (product.product) with its own barcode / SKU / seller code, per-variant stock and price (incl. attribute price_extra), and the variant's attributes mapped to each marketplace's schema (Trendyol/Çiçeksepeti attributes array, Hepsiburada variantGroupId + attributes, n11 item-level attributes). Order import resolves the EXACT variant from barcode/SKU plus the order line's variant attributes, never silently collapsing to the template's first variant. One shared variant-mapping helper backs all four marketplace code paths. Stock & Price Sync: manual button + hourly cron, batched up to 1000 items where the marketplace supports it. Full Pagination: order import walks every page on all four marketplaces, so high-volume sellers never lose orders beyond the first page. Idempotent Push: re-pushing a listed product updates it (price/stock or listing) instead of creating a duplicate listing on Trendyol, Hepsiburada and Çiçeksepeti; n11's stock-by-code endpoint is idempotent by nature. Multi-Warehouse Stock: quantity is read from the configured warehouse, not the company-wide total. Currency Conversion: prices are converted to a per-marketplace configurable currency (default TRY) using Odoo rates before push. Rate-Limit Handling: honors HTTP 429/503 with Retry-After and bounded backoff across REST and SOAP clients. Batch / Import Polling: Trendyol & Çiçeksepeti batch requests and Hepsiburada import batches are polled and their status recorded. Shipment Tracking (push): send tracking numbers (and cargo company / order item) back to the marketplace once cargo is dispatched. Sandbox Mode: per-marketplace staging toggle. Test Connection: one button per marketplace validates credentials with a real, lightweight API call. Unified API Log: every call logged with marketplace, status, duration and error excerpt for troubleshooting. Resilience: REST clients ship urllib3 Retry on 5xx for idempotent verbs, 30s timeouts and structured logging.