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Say we have txA and txB, and txB contains an input that redeems an output from txA.

In order for a block containing both txA and txB to be valid, is it necessary that txB be after txA in the list of transactions for that block?

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  • Related: bitcoin.stackexchange.com/questions/35719/…
    – morsecoder
    Aug 25 '15 at 20:39
  • While I agree that the question is the same, the answer to the other question is simply a long-winded "yes", without any references or sources. How can I mark an answer as correct if I can't judge whether it's correct or not?
    – runeks
    Aug 28 '15 at 12:17