[Bitcoin-development] replace-by-fee v0.10.0rc4

[Justus Ranvier]

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On 02/12/2015 05:24 PM, Oleg Andreev wrote:
> 
>> I think that is a misdirection on your part. The point of
>> replace-by-fee is to make 0-confirms reliably unreliable.
>> Currently people can "get away" with 0-confirms but it's only
>> because most people arent actively double spending, and when they
>> do it is for higher value targets. Double spend attacks are
>> happening a lot more frequently than is being admitted here,
>> according to Peter from work with various clients.
>> 
>> Like single address reuse, people have gotten used to something
>> which is bad. Generally accepting 0-conf is also a bad idea(tm)
>> and instant confirmation solutions should be sought elsewhere.
>> There are already interesting solutions and concepts:
>> greenaddress for example, and CHECKLOCKTIMEVERIFY micropayment
>> channels for example. Rather than supporting and promoting risky
>> 0-confirms, we need to spend time on better alternative solutions
>> that will work for everyone and not during the honeymoon phase
>> where attackers are fewer.
> 
> Here's value-free assessment of the issue here:
> 
> 1. Zero-conf txs are unsafe. 2. We'd all want to have a safer
> instant payments solution if possible. 3. As a social artifact,
> today zeroconf txs happen to work for some people in some
> situations. 4. Replace-by-fee will break #3 and probably hasten
> development of #2.
> 
> The discussion boils down to whether we should make #2 happen
> sooner by breaking remnants of #3 sooner.
> 
> I personally would rather not break anything, but work as fast as
> possible on #2 so no matter when and how #3 becomes utterly broken,
> we have a better solution. This implies that I also don't want to
> waste time debating with Peter Todd and others. I want to be ready
> with a working tool when zeroconf completely fails (with that patch
> or for some other reasons).
> 
> TL;DR: those who are against the patch are better off building a
> decentralized clearing network rather than wasting time on debates.
> When we have such network, we might all want this patch to be used
> for all the reasons Peter has already outlined.

You've left out of the discussion that many (or all) proposed
solutions for 2 either reduce privacy, or security, or both.

That fact should not be ignored or swept under the rug.

There's also no mention of the degree to which child-pays-for-parent
achieves the stated aims of the original proposal (clearing mempool of
stuck transactions, increasing payee assurance of conformation)
without introducing incentives to double spend or forcing people into
privacy/security sacrifices.


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