Ever had a customer ""double-dip"" on discounts and accidentally kill your margins? 📉
@shopify just released a major update to Shopify Functions in the v2026-04 API that gives you total control.
What’s new?
Your custom checkout logic can now ""see"" every discount applied at the Cart, Line Item, and Delivery levels. No more operating in a vacuum.
Why it matters for Merchants:
✅ Stop Margin Bleed: Prevent unwanted stacking (e.g., no BOGO if a 20% code is active).
✅ Complex Logic: Create sophisticated ""Gift with Purchase"" rules based on real-time cart totals.
✅ Smoother Checkout: A more predictable experience for your customers and your bottom line.
The Catch? Your functions must execute after discounts are applied to see this data. If you’re still relying on old workarounds, this is your cue to move to Functions.