We require a shopify app / extension that allows us to offer credit limits to individual customers, as well as 'Pay Later' option.
- Track customer credit limits and remaining balances
- Allow a payment type 'Pay Later' ONLY if customer has remaining balance
- Present a payment option if customer balance < total_cart_amount
- Do not allow 'Pay Later' for customers that don't have credit limit, or customers that don't have login
- 'Pay later' can just save a draft order for processing from admin backend manually