add purchase resource in model catalog

models/resources/storage.go

@@ -2,6 +2,7 @@ package resources
 
 import (
 	"errors"
+	"fmt"
 	"time"
 
 	"cloud.o-forge.io/core/oc-lib/models/common/enum"
@@ -161,6 +162,7 @@ func (r *PricedStorageResource) GetType() tools.DataType {
 }
 
 func (r *PricedStorageResource) GetPrice() (float64, error) {
+	fmt.Println("GetPrice", r.UsageStart, r.UsageEnd)
 	if r.UsageStart == nil || r.UsageEnd == nil {
 		return 0, errors.New("usage start and end must be set")
 	}