On Tue, Dec 8, 2015 at 4:58 AM, Anthony Towns via bitcoin-dev <bitcoin-dev@lists.linuxfoundation.org> wrote: > Having a cost function rather than separate limits does make it easier to > build blocks (approximately) optimally, though (ie, just divide the fee by > (base_bytes+witness_bytes/4) and sort). Are there any other benefits?
Actually being able to compute fees for your transaction: If there are multiple limits that are "at play" then how you need to pay would depend on the entire set of other candidate transactions, which is unknown to you. Avoiding the need for a fancy solver in the miner is also virtuous, because requiring software complexity there can make for centralization advantages or divert development/maintenance cycles in open source software off to other ends... The multidimensional optimization is harder to accommodate for improved relay schemes, this is the same as the "build blocks" but much more critical both because of the need for consistency and the frequency in which you do it. These don't, however, apply all that strongly if only one limit is likely to be the limiting limit... though I am unsure about counting on that; after all if the other limits wouldn't be limiting, why have them? > That seems kinda backwards. It can seem that way, but all limiting schemes have pathological cases where someone runs up against the limit in the most costly way. Keep in mind that casual pathological behavior can be suppressed via IsStandard like rules without baking them into consensus; so long as the candidate attacker isn't miners themselves. Doing so where possible can help avoid cases like the current sigops limiting which is just ... pretty broken. _______________________________________________ bitcoin-dev mailing list bitcoin-dev@lists.linuxfoundation.org https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
