feat: In band inventory updates (#311)

Co-authored-by: olivermrbl <oliver@mrbltech.com>

packages/medusa-core-utils/src/errors.js

@@ -12,6 +12,11 @@ export const MedusaErrorTypes = {
   NOT_ALLOWED: "not_allowed",
 }
 
+export const MedusaErrorCodes = {
+  INSUFFICIENT_INVENTORY: "insufficient_inventory",
+  CART_INCOMPATIBLE_STATE: "cart_incompatible_state",
+}
+
 /**
  * Standardized error to be used across Medusa project.
  * @extends Error
@@ -22,19 +27,22 @@ class MedusaError extends Error {
    * @param type {MedusaErrorType} - the type of error.
    * @param params {Array} - Error params.
    */
-  constructor(name, message, ...params) {
+  constructor(type, message, code, ...params) {
     super(...params)
 
     if (Error.captureStackTrace) {
       Error.captureStackTrace(this, MedusaError)
     }
 
-    this.name = name
+    this.type = type
+    this.name = type
+    this.code = code
     this.message = message
     this.date = new Date()
   }
 }
 
 MedusaError.Types = MedusaErrorTypes
+MedusaError.Codes = MedusaErrorCodes
 
 export default MedusaError