def calc_sha256(self):
if self.sha256 is None or self.powHash is None:
r = b""
r += struct.pack("<i", self.nVersion)
r += ser_uint256(self.hashPrevBlock)
r += ser_uint256(self.hashMerkleRoot)
r += struct.pack("<I", self.nTime)
r += struct.pack("<I", self.nBits)
r += struct.pack("<I", self.nNonce)
self.sha256 = uint256_from_str(hash256(r))
self.powHash = uint256_from_str(powhash.forHeader('neoscrypt', r))
self.hash = encode(hash256(r)[::-1], 'hex_codec').decode('ascii')
def neoscrypt (hexStr):
rawData = codecs.decode (hexStr, 'hex_codec')
rawHash = bytearray (powhash.forHeader ('neoscrypt', rawData))
rawHash.reverse ()
return codecs.encode (rawHash, 'hex_codec')
