Re: [Bitcoin-development] Proposed alternatives to the 20MB step function

2015-05-29 Thread insecurity
Are you really that pig headed that you are going to try and blow up the 
entire system just to get your way? A bunch of ignorant redditors do not 
make consensus, mercifully.


On 2015-05-29 12:39, Gavin Andresen wrote:
 What do other people think?
 
 If we can't come to an agreement soon, then I'll ask for help
 reviewing/submitting patches to Mike's Bitcoin-Xt project that
 implement a big increase now that grows over time so we may never have
 to go through all this rancor and debate again.
 
 I'll then ask for help lobbying the merchant services and exchanges
 and hosted wallet companies and other bitcoind-using-infrastructure
 companies (and anybody who agrees with me that we need bigger blocks
 sooner rather than later) to run Bitcoin-Xt instead of Bitcoin Core,
 and state that they are running it. We'll be able to see uptake on the
 network by monitoring client versions.
 
 Perhaps by the time that happens there will be consensus bigger blocks
 are needed sooner rather than later; if so, great! The early
 deployment will just serve as early testing, and all of the software
 already deployed will ready for bigger blocks.
 
 But if there is still no consensus among developers but the bigger
 blocks now movement is successful, I'll ask for help getting big
 miners to do the same, and use the soft-fork block version voting
 mechanism to (hopefully) get a majority and then a super-majority
 willing to produce bigger blocks. The purpose of that process is to
 prove to any doubters that they'd better start supporting bigger
 blocks or they'll be left behind, and to give them a chance to upgrade
 before that happens.
 
 Because if we can't come to consensus here, the ultimate authority for
 determining consensus is what code the majority of merchants and
 exchanges and miners are running.
 
 --
 
 --
 Gavin Andresen
 
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Re: [Bitcoin-development] Reducing the block rate instead of increasing the maximum block size

2015-05-11 Thread insecurity
 So if the server pushes new block
 header candidates to clients, then the problem boils down to increasing
 bandwidth of the servers to achieve a tenfold increase in work
 distribution.

Most Stratum pools already do multiple updates of the header every block 
period,
bandwidth is really inconsequential, it's the latency that kills. At the 
present
time you are looking up to 15 seconds between the first and last pools 
to push
headers to their clients for the latest block. It's sort of 
inconsequential with
a 10 minute block time, but it cuts into a 1 minute one very heavily.

Some pools already don't do their own validation of blocks, but simply 
mirror
other pools, pushing them to be even more latency focused will just make 
this an
epidemic of invalidity rather than a solution.


 There are several proof-of-work cryptocurrencies in existence
 that have lower than 1 minute block intervals and they work just fine.
 First there was Bitcoin with a 10 minute interval, then was LiteCoin
 using a 2.5 interval, then was DogeCoin with 1 minute, and then
 QuarkCoin with just 30 seconds.

You can't really use these as examples of things going just fine. None 
of these
networks see anything approaching the Bitcoin transaction volume and 
none have
even remotely the same network size. Some Bitcoin forks use floats in 
consensus
critical code and work just fine, for the moment. We can't justify 
poor
decisions with but the altcoins are doing it.

Is there even a single study of the stale rates within these networks?

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Re: [Bitcoin-development] Reducing the block rate instead of increasing the maximum block size

2015-05-11 Thread insecurity
On 2015-05-11 10:34, Peter Todd wrote:
 How do you see that blacklisting actually being done?

Same way ghash.io was banned from the network when used Finney attacks
against BetCoin Dice.

As Andreas Antonopoulos says, if any of the miners do anything bad, we
just ban them from mining. Any sort of attack like this only lasts 10
minutes as a result. Stop worrying so much.

https://youtu.be/ncPyMUfNyVM?t=20s



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Re: [Bitcoin-development] Long-term mining incentives

2015-05-11 Thread insecurity
On 2015-05-11 16:28, Thomas Voegtlin wrote:
 My problem is that this seems to lacks a vision. If the maximal block
 size is increased only to buy time, or because some people think that 7
 tps is not enough to compete with VISA, then I guess it would be
 healthier to try and develop off-chain infrastructure first, such as 
 the
 Lightning network.

If your end goal is compete with VISA you might as well just give up
and go home right now. There's lots of terrible proposals where people
try to demonstrate that so many hundred thousand transactions a second
are possible if we just make the block size 500GB. In the real world
with physical limits, you literally can not verify more than a few
thousand ECDSA signatures a second on a CPU core. The tradeoff taken
in Bitcoin is that the signatures are pretty small, but they are also
slow to verify on any sort of scale. There's no way competing with a
centralised entity using on-chain transactions is even a sane goal.

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