2 Representation of a getwork request/reply
5 from __future__ import division
7 from . import data as bitcoin_data
13 return ''.join(s[x:x+4][::-1] for x in xrange(0, len(s), 4))
15 class BlockAttempt(object):
16 def __init__(self, version, previous_block, merkle_root, timestamp, block_target, share_target):
17 self.version, self.previous_block, self.merkle_root, self.timestamp, self.block_target, self.share_target = version, previous_block, merkle_root, timestamp, block_target, share_target
20 return hash((self.version, self.previous_block, self.merkle_root, self.timestamp, self.block_target, self.share_target))
22 def __eq__(self, other):
23 if not isinstance(other, BlockAttempt):
24 raise ValueError('comparisons only valid with other BlockAttempts')
25 return self.__dict__ == other.__dict__
27 def __ne__(self, other):
28 return not (self == other)
31 return 'BlockAttempt(%s)' % (', '.join('%s=%r' % (k, v) for k, v in self.__dict__.iteritems()),)
33 def getwork(self, _check=False, **extra):
34 if 'data' in extra or 'hash1' in extra or 'target' in extra or 'midstate' in extra:
37 block_data = bitcoin_data.block_header_type.pack(dict(
39 previous_block=self.previous_block,
40 merkle_root=self.merkle_root,
41 timestamp=self.timestamp,
42 target=self.block_target,
47 'data': _swap4(block_data).encode('hex') + '000000800000000000000000000000000000000000000000000000000000000000000000000000000000000080020000',
48 'hash1': '00000000000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000010000',
49 'target': bitcoin_data.HashType().pack(self.share_target).encode('hex'),
50 'midstate': _swap4(sha256.process(block_data[:64])).encode('hex'),
54 self_check = self.__class__.from_getwork(getwork, _check=False)
55 if self_check != self:
56 raise AssertionError('failed check - input invalid or implementation error')
58 getwork = dict(getwork)
64 def from_getwork(cls, getwork, _check=True):
65 attrs = decode_data(getwork['data'])
68 version=attrs['version'],
69 previous_block=attrs['previous_block'],
70 merkle_root=attrs['merkle_root'],
71 timestamp=attrs['timestamp'],
72 block_target=attrs['target'],
73 share_target=bitcoin_data.HashType().unpack(getwork['target'].decode('hex')),
78 del extra['data'], extra['hash1'], extra['target']
79 extra.pop('midstate', None)
80 getwork_check = ba.getwork(_check=False, **extra)
81 if getwork_check != getwork and dict((k, v) for k, v in getwork_check.iteritems() if k != 'midstate') != getwork:
82 raise AssertionError('failed check - input invalid or implementation error')
86 def update(self, **kwargs):
87 d = self.__dict__.copy()
89 return self.__class__(**d)
91 def decode_data(data):
92 return bitcoin_data.block_header_type.unpack(_swap4(data.decode('hex'))[:80])
94 if __name__ == '__main__':
95 BlockAttempt.from_getwork({
96 'target': '0000000000000000000000000000000000000000000000f2b944000000000000',
97 'midstate': '5982f893102dec03e374b472647c4f19b1b6d21ae4b2ac624f3d2f41b9719404',
98 'hash1': '00000000000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000010000',
99 'data': '0000000163930d52a5ffca79b29b95a659a302cd4e1654194780499000002274000000002e133d9e51f45bc0886d05252038e421e82bff18b67dc14b90d9c3c2f422cd5c4dd4598e1a44b9f200000000000000800000000000000000000000000000000000000000000000000000000000000000000000000000000080020000'
101 BlockAttempt.from_getwork({
102 'midstate' : 'f4a9b048c0cb9791bc94b13ee0eec21e713963d524fd140b58bb754dd7b0955f',
103 'data' : '000000019a1d7342fb62090bda686b22d90f9f73d0f5c418b9c980cd0000011a00000000680b07c8a2f97ecd831f951806857e09f98a3b81cdef1fa71982934fef8dc3444e18585d1a0abbcf00000000000000800000000000000000000000000000000000000000000000000000000000000000000000000000000080020000',
104 'hash1' : '00000000000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000010000',
105 'target' : '0000000000000000000000000000000000000000000000cfbb0a000000000000',
108 BlockAttempt.from_getwork({
109 'data' : '000000019a1d7342fb62090bda686b22d90f9f73d0f5c418b9c980cd0000011a00000000680b07c8a2f97ecd831f951806857e09f98a3b81cdef1fa71982934fef8dc3444e18585d1a0abbcf00000000000000800000000000000000000000000000000000000000000000000000000000000000000000000000000080020000',
110 'hash1' : '00000000000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000010000',
111 'target' : '0000000000000000000000000000000000000000000000cfbb0a000000000000',
116 0x148135e10208db85abb62754341a392eab1f186aab077a831cf7,
117 0x534ea08be1ab529f484369344b6d5423ef5a0767db9b3ebb4e182bbb67962520,
119 bitcoin_data.FloatingInteger.from_target_upper_bound(0x44b9f20000000000000000000000000000000000000000000000),
120 0x44b9f20000000000000000000000000000000000000000000000,
125 0x148135e10208db85abb62754341a392eab1f186aab077a831cf7,
126 0x534ea08be1ab529f484369344b6d5423ef5a0767db9b3ebb4e182bbb67962520,
128 bitcoin_data.FloatingInteger.from_target_upper_bound(0x44b9f20000000000000000000000000000000000000000000000),
134 0x148135e10208db85abb62754341a392eab1f186aab077a831cf7,
135 0x534ea08be1ab529f484369344b6d5423ef5a0767db9b3ebb4e182bbb67962520,
137 bitcoin_data.FloatingInteger.from_target_upper_bound(0x44b9f20000000000000000000000000000000000000000000000),
142 ba.getwork(_check=100)
143 ba.update(previous_block=ba.previous_block - 10).getwork(_check=100, ident="hi")