On Wed, Feb 19, 2014 at 9:28 PM, Michael Gronager <grona...@mac.com> wrote: > I think that we could guarantee fewer incidents by making version 1 > transactions unmalleable and then optionally introduce a version 3 that > supported the malleability feature. That way most existing problematic > implementations would be fixed and no doors were closed for people > experimenting with other stuff - tx v 3 would probably then be called > experimental transactions.
Just to be clear: this change is not directly intended to avoid "incidents". It will take way too long to deploy this. Software should deal with malleability. This is a longer-term solution intended to provide non-malleability guarantees for clients that a) are upgraded to use them b) willing to restrict their functionality. As there are several intended use cases for malleable transactions (the sighash flags pretty directly are a way to signify what malleabilities are *wanted*), this is not about outlawing malleability. While we could right now make all these rules non-standard, and schedule a soft fork in a year or so to make them illegal, it would mean removing potential functionality that can only be re-enabled through a hard fork. This is significantly harder, so we should think about it very well in advance. About new transaction and block versions: this allows implementing and automatically scheduling a softfork without waiting for wallets to upgrade. The non-DER signature change was discussed for over two years, and implemented almost a year ago, and we still notice wallets that don't support it. We can't expect every wallet to be instantly modified (what about hardware wallets like the Trezor, for example? they may not just be able to be upgraded). Nor is it necessary: if your software only spends confirmed change, and tracks all debits correctly, there is no need. -- Pieter ------------------------------------------------------------------------------ Managing the Performance of Cloud-Based Applications Take advantage of what the Cloud has to offer - Avoid Common Pitfalls. Read the Whitepaper. http://pubads.g.doubleclick.net/gampad/clk?id=121054471&iu=/4140/ostg.clktrk _______________________________________________ Bitcoin-development mailing list Bitcoin-development@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bitcoin-development
