all the refactor

internal/ucp/cart_test.go

@@ -12,6 +12,7 @@ import (
 	"git.k6n.net/mats/go-cart-actor/pkg/cart"
 	"git.k6n.net/mats/go-cart-actor/pkg/actor"
 	messages "git.k6n.net/mats/go-cart-actor/proto/cart"
+	"git.k6n.net/mats/platform/money"
 	"google.golang.org/protobuf/proto"
 )
 
@@ -230,7 +231,7 @@ func TestCartResponse_Conversion(t *testing.T) {
 
 func mustPrice(incVat int64, totalVat int64) *cart.Price {
 	return &cart.Price{
-		IncVat: incVat,
-		VatRates: map[float32]int64{25: totalVat},
+		IncVat:   money.Cents(incVat),
+		VatRates: map[int]money.Cents{2500: money.Cents(totalVat)}, // 25% in basis points
 	}
 }