zny_yespower_python

python module for pow verification

introduction

yespower is a proof-of-work (PoW) focused fork of yescrypt, which in turn builds upon scrypt. While yescrypt is a password-based key derivation function (KDF) and password hashing scheme, and thus is meant for processing passwords, yespower is meant for processing trial inputs such as block headers (including nonces) in PoW-based blockchains.

yespower versions

yespower includes optimized and specialized re-implementation of the obsolete yescrypt 0.5 (based off its first submission to Password Hashing Competition back in 2014) now re-released as yespower 0.5, and brand new proof-of-work specific variation known as yespower 1.0.

yespower 0.5 is intended as a compatible upgrade for cryptocurrencies that already use yescrypt 0.5 (providing a few percent speedup), and yespower 1.0 may be used as a further upgrade or a new choice of PoW by those and other cryptocurrencies and other projects.

There are many significant differences between yespower 0.5 and 1.0 under the hood, but the main user visible difference is yespower 1.0 greatly improving on GPU-unfriendliness in light of improvements seen in modern GPUs (up to and including NVIDIA Volta) and GPU implementations of yescrypt 0.5. This is achieved mostly through greater use of CPUs' L2 cache.

The version of algorithm to use is requested through parameters, allowing for both algorithms to co-exist in client and miner implementations (such as in preparation for a cryptocurrency hard-fork and/or supporting multiple cryptocurrencies in one program).

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FOR DEV ONLY

If you do not know what you are doing, please do not try. This software is never guaranteed.

installation:

WARNING using sudo.
--record files.txt is for uninstallation.

python setup.py build && \
sudo python setup.py install --record files.txt && \
sudo chown $USER:$USER files.txt

(OPTION) rebuild & reinstall:

WARNING using sudo.
--record files.txt is for uninstallation.

rm -rf build/ & \
python setup.py build && \
sudo python setup.py install --record files.txt && \
sudo chown $USER:$USER files.txt

uninstall

WARNING using sudo & rm.

cat files.txt | sudo xargs rm -rf

testing:

command

python block.py

result

$ python block.py
010000000000000000000000000000000000000000000000000000000000000000000000d6583f75558751197a8e8a2760d4f9b08ba0a40e6e49d456c69f8046c3b85447f0ae0a5bf0ff071f68020000

0007fff000000000000000000000000000000000000000000000000000000000
00058f19d7aac0b35a4d14af96be446ade0d1c4fab889ec29626c1a5517a2802

hash is lower than target (good)

note: libssl1.0 required (libssl1.1 may wont work)