Quote from: jonytk on May 09, 2013, 08:05:04 PM

okay so let me understand, this problem already exist and can be triggered by bad miners,

but don't you think you are overreaching, you were ask to do a way to take transactions out of limbo.
I know very well that because i have one of those chain games, and i time i configured it under .0001 btc and
the transactions that didn't include fee never arrived, yet still pending.

Don't be naive, the coding you are doing is exactly what the bad miner needs,
if i give you 1000$ will you code me an alt-coin and an exchange for me?
Because i'm in...

A few days ago i saw a thread "how to make a genesisblock" by some kid from 4chan trying to do a noob-coin...
if you see a new alt-coin every 4 hours now you know why...

PD: i'm not questioning retep nor do i have shares on SD. Just want this discussed further before he releases any of the code.

This patch makes the best case the same as the worst case: zero-confirmation transactions can be "overridden" if another transaction with a higher fee is broadcast before it makes it into a block. We are arguing that this unquestionably how miners will operate in the future, anyway, so we change the default now to prevent any further adaptation to a false sense of security/reality. i.e. users currently experience transactions not being replaced so readily, so they build around an assumption that zero-conf are okay for zero-trust situations. They're not.

I agree this is not inline with the original intention of the software, but I don't think there's a way around it. Miners will do this eventually, even if most of them aren't, yet. Let's not pretend they won't.

Plus, this patch comes with the nice benefit that "stuck" tx can be easily fixed. Though, I do agree that a non-deterministic "undo" button is a bad idea. It would be unreliable in many ways, and would also give a false sense of reality to users. Instead, I'd like to see a button/dialog that says "This transaction has been waiting more than one hour without being accepted. Would you like to increase the fee to try to speed up its acceptance?"