How to test OFAC sanctions screening

Testing procedure: (1) Use a known sanctioned wallet address (Tornado Cash: 0x098B716B8Aaf21512996dC57EB0615e2383E2f96). (2) Call your screening function with this address. (3) Confirm the result is clean: false. (4) Test that your payment function BLOCKS (not just logs) on match. (5) Repeat with a clean wallet to confirm normal payments still work.