Hi ZmnSCPxj, Christian, list,
the paper is a bit confusing regarding the setup transaction, as it is
not described formally. There also seems to be a mixup of "setup
transaction" and "funding transaction", also named T_{u,0} without
showing it in the diagrams.In 3.1 the funding transaction is described as funding "to a multisig address". In the description of trigger transactions the change is described as "The output from the setup transaction is changed into a simple 2-of-2 multisig output" - which it already is? As far as I understand the situation, the trigger transaction is needed because the broadcasted initial/funding/setup transaction includes an OP_CLV, which then starts the timer and could lead to premature settlement. Removing OP_CLV (and having in a transaction that is only published later when it is needed), i.e. by changing it to a simple multisig output, seems to solve this issue. Could you (Christian?) explain how the "setup transaction" is supposed to look like without the changes described in section 4.2? I like the idea proposed by ZmnSCPxj, but I'm not able to weigh the pro/cons of both approaches. For a direct unilateral close both peers would need to know the first update transaction and an attached settlement transaction, which is comparable to the approach presented in the paper (trigger transaction and settlement transaction). The main advantage of getting rid of the trigger transaction seems to be that only two transactions (latest update and settlement) have to be committed to the blockchain in the unilateral case, compared to three (trigger, latest update, settlement) in the approach presented in the paper. As a minor advantage the peers do not need to remember the trigger transaction. Bye, Carsten -- andrena objects ag Ganghoferstraße 70 80339 München http://www.andrena.de Vorstand: Hagen Buchwald, Dr. Dieter Kuhn, Stefan Schürle Aufsichtsratsvorsitzender: Rolf Hetzelberger Sitz der Gesellschaft: Karlsruhe Amtsgericht Mannheim, HRB 109694 USt-IdNr. DE174314824 Bitte beachten Sie auch unsere anstehenden Veranstaltungen: http://www.andrena.de/events
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