A friend of mine was doing business with Company A, and asked a lawyer to draft a contract saying that if Company A failed to perform, my friend would be able to take possession of Asset X (the critical asset), as an indemnity so that he could do the job himself. The lawyer drafted a contract with Asset Y (a totally different Asset) as indemnity. Further, he attached several Exhibits to the contract that don't clearly relate to either Asset X or Y, and only confuse the picture.
Company A failed to perform, but won't hand over Asset X, and my friend doesn't have the indemnity that he envisioned because of the way the contract was drafted. (A first year law student could probably have done better.) That's the causation. The harm comes from the fact that my friend now has to sue Company A, which might not be necessary if the contract was solid. The breach of duty comes from the disregard of instructions to "securitize" Asset X.
Does this constitute legal malpractice, and if so, what are the remedies? These questions relate to New York State.