Easypaisa Payment Gateway for ERPNext

ECOSIRE builds a proper Frappe app (its own module, not a pile of loose server scripts) that registers Easypaisa as a first-class payment method inside ERPNext. We add an Easypaisa Settings single DocType to hold your Store ID, credentials, and hashing secret (encrypted via Frappe's Password fieldtype), and an Easypaisa Transaction DocType that logs every order token, amount, status, and raw IPN payload for a full audit trail. The checkout flow uses the Payment Gateway / Payment Request abstraction so it slots into the Web Shop, the Payment Request email link, and portal checkout without you re-plumbing anything: the customer is redirected to Easypaisa's hosted checkout, pays via mobile account (MA), card, or OTC, and Easypaisa posts back to a whitelisted callback endpoint.

Technically, the integration is wired through hooks.py — whitelisted methods (@frappe.whitelist(allow_guest=True)) expose the initiation and IPN callback URLs, and doc_events hook the Payment Request and Sales Invoice lifecycle. Every inbound callback is verified against the signature/hash Easypaisa returns before anything is trusted, so a spoofed or replayed callback cannot mark an invoice paid. On a verified success we create and submit a Payment Entry against the referenced Sales Invoice, set the reference number to the Easypaisa transaction ID, and settle the invoice atomically. A scheduler event (registered in scheduler_events) polls pending transactions on an interval to catch callbacks that never arrived — the classic reconciliation gap — and a client script surfaces payment status on the invoice for your team. Role-based permissions restrict the settings and transaction logs to a finance role profile, and the Frappe REST API endpoints stay available for your own automation.

Because this is build-to-order, nothing is installed until we agree on scope. We start with a short scoping call, confirm your Easypaisa merchant product (MA collections, card, OTC), your Frappe/ERPNext version (v15 or v16), and your checkout surfaces. We build and test on a staging bench, run UAT with your real sandbox credentials, then install on production with a rollback plan and hand over the git repository. Typical delivery is 2-4 weeks from confirmed scope.