Buying products

• Users can buy active products only within available balance.
• The requested quantity must be available in admin stock at the time of purchase.
• After purchase, user balance is reduced and user product holding is increased.

Selling products

• Users can sell only product quantity available in their own holdings.
• Quantity reserved for delivery cannot be sold while the delivery request is processing.
• After selling, product quantity is deducted from user holdings and the sale value is added to user balance.

Price updates

Admin may update product prices after market review. Buy and sell actions use the current listed price at the time of the action.

Record keeping

Balance changes, product actions, and admin actions are recorded in the transaction ledger and audit log where applicable.