Pakistani merchants and service businesses running ERPNext hit the same wall: JazzCash is how their customers actually pay, but ERPNext core ships no JazzCash Payment Gateway. Teams end up taking wallet and card payments outside the system, then keying Payment Entries in by hand and hoping the bank statement matches at month end. Reconciliation drifts, gateway fees get lost in "other charges," and finance spends days chasing which order a settlement belonged to. ERPNext's generic Payment Gateway and Payment Request framework is genuinely good — it just has no JazzCash provider to plug into, and the hosted/aggregator connectors on the Frappe marketplace rarely map JazzCash's HS/HTTP transaction API, mobile-wallet MPIN flow, and commission structure the way a real Pakistani merchant account needs.

ECOSIRE builds a proper Frappe app — its own module, DocTypes, and hooks.py doc events — that registers JazzCash as a first-class integration inside ERPNext. We add a JazzCash Settings single DocType for your Merchant ID, Password, Integrity Salt, and sandbox/live toggle (secrets stored via Frappe's encrypted password fieldtype, never in plaintext), and a JazzCash Transaction DocType that logs every request and response for audit. Checkout works through ERPNext's native Payment Request: a whitelisted method (@frappe.whitelist()) builds the signed pp_ payload with the correct HMAC-SHA256 secure hash over the sorted field set, then hands off to JazzCash mobile-wallet or card checkout. Customers can also be sent a hosted payment link generated from a Sales Invoice or Sales Order.

Confirmation is webhook-first, not trust-the-redirect. An inbound endpoint validates the returned secure hash before doing anything, so a spoofed browser redirect can never mark an invoice paid. On a verified pp_ResponseCode success the app creates and submits a Payment Entry against the source invoice, sets the reference number to the JazzCash pp_TxnRefNo, and maps the deducted MDR/commission to a configurable fee account so your bank rec actually ties out. Refunds are handled through JazzCash's refund transaction and written back as a linked negative/return entry. A scheduler event (registered in scheduler_events) sweeps any pending or ambiguous transactions on an interval and re-queries JazzCash status, so a dropped webhook self-heals instead of leaving a stuck invoice. Client scripts surface transaction status and a "Retry / Reconcile" action right on the invoice form, and access is gated by a dedicated role profile so only finance users can touch gateway settings or trigger refunds.

Because this is build-to-order, nothing ships until we agree on scope. We start with a short scoping call, confirm your JazzCash merchant account type (wallet, card, or both), your ERPNext version (v15 or v16), your invoice/fee-account structure and any multi-company needs, then build against that. You get the work on a staging site first for UAT, a rollback plan, and the full git repository at handover — no black box. Typical delivery is one working week from confirmed scope, and every method is written to the current Frappe REST/whitelisted-method conventions so it survives your next bench update.