From nicolas.dorier at gmail.com Wed Feb 8 04:16:25 2017 From: nicolas.dorier at gmail.com (Nicolas Dorier) Date: Wed, 8 Feb 2017 13:16:25 +0900 Subject: [Lightning-dev] Anchor transaction for no expiration channels without segwit In-Reply-To: References: Message-ID: With this solution, is there any problem left without Segwit outside no third party channel monitoring and channel establishment which need to wait Bob bounty expiration ? On Tue, Feb 7, 2017 at 9:02 PM, Tier Nolan wrote: > On Tue, Feb 7, 2017 at 2:39 AM, Nicolas Dorier > wrote: > >> Good point, actually, a simpler way to do it, is for TX2 to be >> nTimelocked after bounty's expiration. >> > > That works too and keeps the transaction smaller. > > I think a symmetrically funded channel needs 4 1BTC outputs, so it is > pretty much two single funded channels. It would be slightly smaller than > 2 transactions to open the channel. > > TX1 > > Input > 2 from Alice > 2 from Bob > > Output > 1: (Alice + Bob) OR (Bob + AliceSecret) > 1: (Alice + Bob) OR (Alice + BobSecret) > 1: (Bob + timeout(now + T)) OR (Alice + AliceSecret) > 1: (Alice + timeout(now + T)) OR (Bob + BobSecret) > > TX2 > locktime: now + 2T > > Input > TX1/0: signed by (Alice + Bob) > TX1/1: signed by (Alice + Bob) > Output > Initial channel paying Alice & Bob 1BTC each > > --------------------------------------- > > Alice and Bob create TX1, sign it and share the result. > > Alice and Bob create TX2, sign it and share the result. > > Abort for those 2 steps: > * If one signs and the other doesn't then the signer should spend their > inputs to be safe. > * If TX1 is broadcast, then they can both spend their timeouts to recover > their funds, so it is safe. > > Once they both have signed versions of TX1 and TX2, they should broadcast > TX1. This initializes the channel. > > If TX1 is mutated, then they should both abort and spend their timeouts > and recover their funds. > > _______________________________________________ > Lightning-dev mailing list > Lightning-dev at lists.linuxfoundation.org > https://lists.linuxfoundation.org/mailman/listinfo/lightning-dev > > -------------- next part -------------- An HTML attachment was scrubbed... URL: