The honest window
The terminal rechecks a submitted transaction within seconds and keeps watching until the chain gives a final answer. Solana can land a transaction up to its blockhash expiry, about 2 minutes, so a “dropped” transaction that sneaks in late is still caught and reported as the trade it is. Protected Sec trades land as bundles, which can confirm late by design. Their watch window is longer for exactly that reason: nothing gets falsely declared dead.Failed transactions
What failure means, what it costs (nothing), and the fix for each cause.