Okay, I can do that --- but for a PR to make any sense, sifcoin-hash needs to be available to install from PyPi (which it now is).

TBH, I really doubt whether the PR will ever get merged because it proposes to add a Chain subclass with a known unmanaged dependency (i.e. sifcoin-hash) for which the requirement kicks at runtime and it's a showstopper for what would be reasonably expected to be a supported configuration.

I think this is why most algo-specific Abe variants inhabit their own fork, it allows the maintainer to include the specific supported hash function as a subdir, thus enabling the dependency to be advertised and imposed at install time.

Whatever, the edited bitcoin-abe fork is https://github.com/gjhiggins/bitcoin-abe, PR is https://github.com/bitcoin-abe/bitcoin-abe/pull/155

The supporting sifcoin-hash module is https://github.com/gjhiggins/sifcoin-hash and on PyPi: https://pypi.python.org/pypi/sifcoin-hash/1.0.2


Sifcoin's innovation of using a folklore hash combiner makes it one of the more notable members of the altcoin technical engineering heritage.


Cheers

Graham