The U.S. Federal Reserve is expected on Wednesday to propose an official review of the fees banks can charge retailers for debit card transactions, setting up a battle between the two industries that could result in a court challenge. The scheduled Fed board meeting will mark the first time in over a decade that the central bank has proposed revising the fees, which generated around $24.31 billion for lenders in 2019, the most recent Fed data shows. The Fed has not said how it plans to change the fees, which have long been criticized by retailers as disproportionately high, and a spokesman for the central bank declined to comment.