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On 6 August 2014 09:31:24 GMT-07:00, Mark Friedenbach <m...@monetize.io> wrote: >I highly doubt that is the best approach. > >If this nExpiry field is a consensus rule, then the Merkle tree or the >appropriate paths through needs to be included with the transaction as >part of the network and on-disk data structures, so that proper >validation can be done. This would be both more disruptive and less >efficient than simply adding an nExpiry field to the transaction >format, >as we do in Freimarkets. The general case doesn't require transmission of any merkle data; it is derived from the tx data. Equally changing a data format is certainly: note how Freimarkets has no third-party library support because you've made it incompatible with the standard Bitcoin data structures. Merkle radix tree formatting OTOH is just a cryptographically committed extension of the tag-value concept seen in protobuf, among others. re: efficiency, we need fundamental improvements in efficiency, not little micro-optimisations everywhere done at high cost to maintainability. re: validation, note how the merkle radix tree meets that need by allowing the absence of data to be proven. >If the field is pre-consensus (a mempool gentleman's agreement), then >it >has no business in the transaction structure at all and should be >packaged in some sort of envelope container. It's also rather useless without consensus. Expiry is only useful if it is a guarantee, if not you might as well just implement tx replacement directly. -----BEGIN PGP SIGNATURE----- Version: APG v1.1.1 iQFQBAEBCAA6BQJT4mPZMxxQZXRlciBUb2RkIChsb3cgc2VjdXJpdHkga2V5KSA8 cGV0ZUBwZXRlcnRvZGQub3JnPgAKCRAZnIM7qOfwhcbKCACz/Qh3wm7ud9iwbvm3 Hzib36/fixk2++z6xlxh8G8afUaAe7ADCoz/TLK7RNIhUnr2hlsPO+Id2XvVBSm1 gXavj4iDxq8TpWsC8zPs5vyyY/dVwQ0RbidQFSpncmdW6EYVpIQp9nP3sSnBv1M8 c7BVidg708tc44uYiM9jeTzh6amP5yD0+G9FYYmy36BAQj8+4iD1ZCkiye1y5WUL 9MSN8LOxRFEwWQJmySXmJ1I9V81l1NSRQcQtfLVCzEIWLJXrZ0xwOq0SryEObg73 72NZKc2u8la3CPDoCG773ENbGHl+mGJW9M5ypV0s2RdkdZMgaFNnl/SBrWAcPd43 FkLr =OMOy -----END PGP SIGNATURE----- ------------------------------------------------------------------------------ Infragistics Professional Build stunning WinForms apps today! Reboot your WinForms applications with our WinForms controls. Build a bridge from your legacy apps to the future. http://pubads.g.doubleclick.net/gampad/clk?id=153845071&iu=/4140/ostg.clktrk _______________________________________________ Bitcoin-development mailing list Bitcoin-development@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bitcoin-development
