Hey Nadav, that’s a good call as it’s not particularly intuitive when you try to read it. I’ll try to add to it if I can. Thanks!
Ugam From: Nadav Kohen <na...@suredbits.com> Sent: Wednesday, June 5, 2019 10:08 PM To: Ugam Kamat <ugamkam...@gmail.com> Cc: Pierre <pm+li...@acinq.fr>; lightning-dev <lightning-dev@lists.linuxfoundation.org> Subject: Re: [Lightning-dev] BOLT #3: Shouldn't timeout be included in the script of "Offered HTLC Outputs" for the local node? Hi Ugam, I also ran into an issue understanding this a while back, here's a PR I opened to try and make things more clear: https://github.com/lightningnetwork/lightning-rfc/pull/601 Feel free to add to it or comment if you think things could be improved :) Best, Nadav On Wed, Jun 5, 2019 at 11:33 AM Ugam Kamat <ugamkam...@gmail.com <mailto:ugamkam...@gmail.com> > wrote: Ah, now I see what you mean, it is locked with absolute timelock and hence I cannot broadcast that transaction. My apologies and thanks for the help! Ugam From: Ugam Kamat <ugamkam...@gmail.com <mailto:ugamkam...@gmail.com> > Sent: Wednesday, June 5, 2019 10:00 PM To: 'Pierre' <pm+li...@acinq.fr <mailto:pm%2bli...@acinq.fr> > Cc: 'lightning-dev' <lightning-dev@lists.linuxfoundation.org <mailto:lightning-dev@lists.linuxfoundation.org> > Subject: RE: [Lightning-dev] BOLT #3: Shouldn't timeout be included in the script of "Offered HTLC Outputs" for the local node? Hey Pierre, That’s what I am having a hard time understanding. Although it is timelocked in the second stage HTLC-timeout, I can still spend the original commitment transaction although after some time. This is what my thought process is: * Offer the Htlc output and sign the commitment transactions * Broadcast the commitment transaction containing the offered HTLC outputs to the main chain. The outputs of commitment tx are: (1) to remote; (2) to local with to_self_delay and (3) to P2WSH (the script I pasted earlier) * Commitment transaction gets mined * Spend the third output using 0 <remotehtlcsig> <localhtlcsig> 0 in the witness stack which will send the outputs to <local_delayed_pubkey> using to_self_delay Now I think when you say the HTLC time out transaction is timelocked, you are referring the to the to_self_delay when spending the htlc-timeout. But although there is that timeout, the commitment transaction is already broadcasted, and the P2WSH output is already sent to my public key (although with a delay I can still spend that without my counterparty’s assent). Now, my counterparty on the other hand when he gets the pre-image, does not have the P2WSH output to claim his bitcoins with the pre-image because it has been already locked with my <local_delayed_pubkey> which I can spend when the to_senf_delay` is over Ugam From: Pierre <pm+li...@acinq.fr <mailto:pm+li...@acinq.fr> > Sent: Wednesday, June 5, 2019 9:35 PM To: Ugam Kamat <ugamkam...@gmail.com <mailto:ugamkam...@gmail.com> > Cc: lightning-dev <lightning-dev@lists.linuxfoundation.org <mailto:lightning-dev@lists.linuxfoundation.org> > Subject: Re: [Lightning-dev] BOLT #3: Shouldn't timeout be included in the script of "Offered HTLC Outputs" for the local node? Hello Ugam, The HTLC-Timeout transaction <https://github.com/lightningnetwork/lightning-rfc/blob/master/03-transactions.md#htlc-timeout-and-htlc-success-transactions> is timelocked (with locktime=cltv_expiry). Cheers, Pierre _______________________________________________ Lightning-dev mailing list Lightning-dev@lists.linuxfoundation.org <mailto:Lightning-dev@lists.linuxfoundation.org> https://lists.linuxfoundation.org/mailman/listinfo/lightning-dev
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