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Payone ERPNext Payment Integration

A NestJS middleware service connecting the Payone payment gateway directly with ERPNext accounting flows for automated invoice reconciliation.

2024
01 / PROBLEM

A fragmented workflow was slowing the whole system.

Manual invoice payment recording in ERPNext created operational friction, accounting delays, and potential reconciliation errors across sales transactions.

02 / SOLUTION

One product model, expressed clearly at every layer.

Developed a dedicated NestJS integration microservice that securely handles Payone gateway webhooks, settles sales invoices automatically, and updates ERPNext ledgers in real time.

03 / CHALLENGES OVERCOME

Complexity moved behind durable boundaries.

Ensuring strict transaction idempotency, validating Payone security signatures, and preventing duplicate ledger postings during webhook retries.

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