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Multi-vendor marketplace
MarketHub lets independent vendors list products, manage orders, and track performance from their own dashboard, while shoppers get a single unified storefront.
Payments are handled through a dedicated service with idempotent processing, and vendors get real-time order notifications.
Duplicate payment webhooks from the provider occasionally double-credited vendor balances.
Made every webhook handler idempotent by keying on the provider's event ID and storing processed IDs, so retries are safely ignored.
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