I believe you can use nLockTime[0] to construct and broadcast a transaction that... | Hacker News

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		unlimited_power on Dec 5, 2013 \| parent \| context \| favorite \| on: Stop Saying Bitcoin Transactions Aren’t Reversible I believe you can use nLockTime[0] to construct and broadcast a transaction that cannot be accepted into a block at least until a particular time. Before that time is reached, you should be able to broadcast a conflicting transaction if so desired that is included in a block sooner, thus invalidating the previously broadcast transaction. [0] https://en.bitcoin.it/wiki/NLockTime

nwh on Dec 5, 2013 [–]

That's right. You have to keep broadcasting it though, the transaction won't be retained in the nodes storage for a long period of time.

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