Subversion Repositories SmartDukaan

Last modification

• Rev 37538 2026-09-05 05:56:43
• Author: amit

• Log message:

  gstpro: a shipped delivery challan is a return, not a cancellation
  
  Movement becomes the single discriminator for both document types. Nothing has
  left the warehouse, so nothing happened and the document can be withdrawn; once
  the goods have shipped the document records a movement that really occurred, and
  the only honest reversal is an opposing document - a credit note through finance.
  
  The clock is the only thing that differs. A tax invoice must also be inside its
  24h IRN window, because past that NIC will not cancel the IRN. A delivery challan
  has no IRN and no acknowledgement - every DC row carries a placeholder irn and a
  null ack_date - so no clock applies to it: an unshipped challan stays withdrawable
  whatever its age, and its e-way bill is cancelled on that path since nothing moved
  under it.
  
  Previously a DC short-circuited to cancellable regardless of shipping, which would
  have voided challans whose goods were already in transit.