Does the government's suppression of an informant's identity and impeachment evidence in a sting operation violate Rovario v. United States, Smith v. Illinois, and Brady v. Maryland?

question presented is this: Does the government’s suppression of an informant’s identity and impeachment evidence in a sting operation violate Rovario v. United States, 353 U.S. 53 (1957), Smith v. Illinois, 390 U.S. 129, 131 (1968), and Brady v. Maryland, 373 U.S. 83 (1963)? 2. After Rehaif v. United States, 139 S.Ct. 2191 (2019), may the government prove a defendant violated 18 U.S.C. § 922(g)(1) (possession of firearm by someone convicted of a crime punishable by more than a year in prison) or § 922(d)(1) (sale to a prohibited person) merely by the statement that one has a “felony” conviction when the words “felon” or “felony” do not appear anywhere in the statutes?