Luke,

- Definitely agree with most of your suggestions on the practical side; several clarification could be made.
- The power to decrease the hard limit appears riskier long term in my analysis.  This is mitigated somewhat by the ease at which miners may locally or collectively lower the block size at any time, without a vote.


On Wed, Sep 2, 2015 at 8:17 PM, Luke Dashjr <luke@dashjr.org> wrote:
On Wednesday, September 02, 2015 11:58:54 PM Jeff Garzik via bitcoin-dev
wrote:
> The repo: https://github.com/jgarzik/bip100

What is the purpose of the newly added 1 MB floor? It seems clear from the
current information available that 1 MB is presently too high for the limit,
and it is entirely one-sided to only allow increases when decreases are much
more likely to be needed in the short term.

Must the new size limit votes use 11 bytes of coinbase? Why not just use a
numeric value pushed after height? Since this is a hardfork, I suggest
increasing the coinbase length to allow for 100 bytes *in addition* to the
pushed height and size-vote.

I suggest combining 2 & 4 into a single rule lifting the 1 MB limit to 32 MB
(or whatever value is deemed appropriate) to make it clear that the limit
remains a part of the consensus protocol and p2p protocol limits are not to
have an effect on consensus rules.

Furthermore, I suggest modifying the voting to require 50% to set the limit
floor. This has the effect of merely coordinating what miners can already
effectively do today by rejecting blocks larger than some collusion-
determined limit.

Thoughts?

Luke