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"""Wrapper for libequihash library
Copyright (c) 2021, Marsiske Stefan.
All rights reserved.
This file is part of libequihash
libequihash is free software: you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public License
as published by the Free Software Foundation, either version 3 of
the License, or (at your option) any later version.
libequihash is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with libequihash If not, see <http://www.gnu.org/licenses/>.
"""
import ctypes
import ctypes.util
from ctypes import sizeof, c_uint16, c_uint8, c_size_t, c_uint32
equihashlib = ctypes.cdll.LoadLibrary(ctypes.util.find_library('equihash') or ctypes.util.find_library('libequihash'))
if not equihashlib._name:
raise ValueError('Unable to find libequihash')
def __check(code):
if code == 0:
raise ValueError
def solsize(n,k):
return equihashlib.solsize(n,k)
def solve(n, k, seed):
sol_len = equihashlib.solsize(n,k)
sol = ctypes.create_string_buffer(sol_len)
__check(equihashlib.solve(n,k,seed,len(seed),sol,sol_len))
return sol.raw
def verify(n,k,seed,sol):
return equihashlib.verify(n,k,seed,len(seed),sol,len(sol)) == 1
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