A federal appellate court entered a scathing opinion that rebuked a Texas district court decision, ruling that the U.S. Department of the Treasury “overstepped” its authority under the International Emergency Economic Powers Act when it sanctioned crypto company Tornado Cash’s immutable smart contracts.

“IEEPA grants the President broad powers to regulate a variety of economic transactions, but its language is not limitless,” U.S. Court of Appeals for the Fifth Circuit Judge Don R. Willett ruled in the 34-page opinion on behalf of a three-judge panel. “Mending a statute’s blind spots or smoothing its disruptive effects falls outside our lane. We decline the Department’s invitation to judicial lawmaking—revising Congress’s handiwork under the guise of interpreting it. Legislating is Congress’s job—and Congress’s alone.”