It's also important to point out that this is impossible on Hive because operations on Hive do actually expire quite quickly (after like a couple hours). This is due to the ref_blocknum variables that all Hive operations have.
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I remember reading about the time limit on Hive transactions and I'm confused when anyone mentions cold wallets and offline signing of transactions. Apparently there is plenty of time for moving the transaction in and out of the signing station.