A wallet popup shows a contract address, a function name, and a gas estimate. Nothing on that screen tells you what your balances look like after you sign. Most people click approve anyway, because the alternative is reading bytecode. Blind signing is how a large share of onchain losses that weren't protocol bugs actually happened. The user authorized it. They simply had no way to see what they were authorizing. Velora, the reactive DeFi portfolio prototype shown at a recent Rialo Builders Hub, simulates every transaction onchain before the user wallet signs anything. The outcome gets computed first. The signature comes after, against a result the user can inspect. Combined with a hard $2,500 daily cap and automatic blocking of transfers to unauthorized addresses, the agent operates inside walls the user can actually see. What makes pre simulation trustworthy here is that @RialoHQ's execution is deterministic by construction. Programs get canonicalized into identical bytecode across every validator before anything runs, with explicit resource limits assigned upfront. A simulation that cannot diverge from the real execution is a simulation worth reading. Hardware wallets settled the question of who holds the key. Nobody ever settled whether the person holding it understood what they were signing.