← Practice range
Signature replayTricky 35 XP
The coupon with no expiry
A contract pays out to anyone presenting a valid signed “coupon”. The signed data is just the amount — no nonce, no expiry, no chain id. What goes wrong?
Pick one option.
A contract pays out to anyone presenting a valid signed “coupon”. The signed data is just the amount — no nonce, no expiry, no chain id. What goes wrong?