Double spend detection is by definition best-effort. The purpose of bitcoin is to provide security (confirmations) to otherwise insecure, possibly double spent transactions. On Fri, Jun 19, 2015 at 2:05 PM, Frank Flores wrote: > Has anyone from Mycelium weighed in on this? Is their doublespend attack > detection broken with this kind of irresponsible behavior? > > On Fri, Jun 19, 2015 at 3:39 PM, Matt Whitlock > wrote: > >> On Friday, 19 June 2015, at 9:18 am, Adrian Macneil wrote: >> > If full-RBF sees any significant adoption by miners, then it will >> actively >> > harm bitcoin adoption by reducing or removing the ability for online or >> POS >> > merchants to accept bitcoin payments at all. >> >> Retail POS merchants probably should not be accepting vanilla Bitcoin >> payments, as Bitcoin alone does not (and cannot) guarantee the >> irreversibility of a transaction until it has been buried several blocks >> deep in the chain. Retail merchants should be requiring a co-signature from >> a mutually trusted co-signer that vows never to sign a double-spend. The >> reason we don't yet see such technology permeating the ecosystem is >> because, to date, zero-conf transactions have been irreversible "enough," >> but this has only been a happy accident; it was never promised, and it >> should not be relied upon. >> >> >> ------------------------------------------------------------------------------ >> _______________________________________________ >> Bitcoin-development mailing list >> Bitcoin-development@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/bitcoin-development >> > > > > -- > *MONEY IS OVER!* > IF YOU WANT IT > > ===================================================== > The causes of my servitude can be traced to the tyranny of money. > -Serj Tankian > > > ------------------------------------------------------------------------------ > > _______________________________________________ > Bitcoin-development mailing list > Bitcoin-development@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bitcoin-development > > -- Jeff Garzik Bitcoin core developer and open source evangelist BitPay, Inc. https://bitpay.com/