I wrote a contract A that uses msg.sender for authentication: When A creates an item it stores msg.sender in itemsOwners mapping (itemOwners[itemId] = msg.sender;). Later A compares msg.sender to itemOwners[itemId] to check access rights.
Now I have the trouble that I cannot use my contract B to wrap calls to A, because A wrongly assumes that the item owner is the contract B, when B calls A. So it stores a wrong item owner that should be a user, not contract B.
Should I replace msg.sender by tx.origin in A? Or what to do? It was not recommended to use tx.origin. So?
I ask not what is the difference between msg.sender and tx.origin, but what to do?
