On 1 October 2016 at 08:02, Luke Dashjr via bitcoin-dev < bitcoin-dev@lists.linuxfoundation.org> wrote:
> On Saturday, October 01, 2016 4:01:04 AM Rusty Russell wrote: > > > - Otherwise <bits> of hash is compared to lower <bits> of blockhash. > > Lower in what endian? Why only that endian? Why only lower? I can see a > possible use case where one wants to look at only the high bits to ensure > their transaction is only valid in a block with at least a certain > difficulty... Why not use segwit versioning for all this stuff? That lets you re-enable the bitwise operations like OP_AND, permitting arbitrary bit-masks. Further, the "at least a certain difficulty" problem suggests a solution by extending the validity of opcodes like OP_LESSTHAN etc. to 256-bit inputs.
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