On Saturday, October 01, 2016 4:01:04 AM Rusty Russell wrote:
> Prefer a three-arg version (gbits-to-compare, blocknum, hash):
> - If is 0 or > 256, invalid.
> - If the hash length is not ( + 7) / 8, invalid.
This means zero padding on-chain, which would be undesirable.
Rather "at most" and have
Luke Dashjr via bitcoin-dev writes:
> This BIP describes a new opcode (OP_CHECKBLOCKATHEIGHT) for the Bitcoin
> scripting system to address reissuing bitcoin transactions when the coins
> they
> spend have been conflicted/double-spent.
>
> https://github.com/luke-jr/bips/blob/bip-cbah/bip-cbah
A new BIP is proposed to prevent excessive O(n^2) SignatureHash operation.
https://github.com/jl2012/bips/blob/sighash/bip-sighash.mediawiki
https://github.com/bitcoin/bitcoin/pull/8755 (Tight estimation)
https://github.com/bitcoin/bitcoin/pull/8756 (Loose estimation)
Two methods of sighash size
