PriceStrategy overwriting cart unit_price

[dennisrb2]

Hi, i'm trying to create a product with a single variant.

I created a custom service to calculate the price based on the selected height and width of the customer. When adding the item to the cart, i call a custom API route with the variant id, height and width, and add the cart item with the correct calculated unit_price.

I use generateLineItem for this and the cartService to add it. I can confirm through a simple db query that the unit_price has been set correctly.

Calling the cart API route directly also shows the correct unit_price.

However, using the nextjs-starter project, when i refresh the page, I suspect the priceStrategy service gets called and overrides the unit_price.

I tried implementing a custom priceStrategy to calculate the unit_price on the fly, but this service also calculates stuff for the product page. I also cannot inject the product and cart dependencies (cyclic dependency injection).

Any ideas? How can i tell the engine to not overwrite my unit_price with a variant?