def from_target_upper_bound(cls, target):
n = bases.natural_to_string(target)
if n and ord(n[0]) >= 128:
n = '\x00' + n
bits2 = (chr(len(n)) + (n + 3*chr(0))[:3])[::-1]
bits = struct.unpack('<I', bits2)[0]
return cls(bits)
def from_target_upper_bound(cls, target):
n = bases.natural_to_string(target)
if n and ord(n[0]) >= 128:
n = '\x00' + n
bits2 = (chr(len(n)) + (n + 3 * chr(0))[:3])[::-1]
bits = struct.unpack('<I', bits2)[0]
return cls(bits)
def test_all(self):
for i in xrange(10):
alphabet = generate_alphabet()
for i in xrange(100):
n = random.randrange(100000000000000000000000000000)
s = bases.natural_to_string(n, alphabet)
n2 = bases.string_to_natural(s, alphabet)
#print n, s.encode('hex'), n2
self.assertEquals(n, n2)
def test_all(self):
for i in xrange(10):
alphabet = generate_alphabet()
for i in xrange(100):
n = random.randrange(100000000000000000000000000000)
s = bases.natural_to_string(n, alphabet)
n2 = bases.string_to_natural(s, alphabet)
#print n, s.encode('hex'), n2
self.assertEquals(n, n2)
def _target_to_bits(self, target, _check=True):
n = bases.natural_to_string(target)
if n and ord(n[0]) >= 128:
n = '\x00' + n
bits2 = (chr(len(n)) + (n + 3*chr(0))[:3])[::-1]
bits = struct.unpack('<I', bits2)[0]
if _check:
if self._bits_to_target(bits) != target:
raise ValueError(repr((target, self._bits_to_target(bits, _check=False))))
return bits
def base58_decode(b58data):
b58data2 = b58data.lstrip(base58_alphabet[0])
return chr(0)*(len(b58data) - len(b58data2)) + bases.natural_to_string(bases.string_to_natural(b58data2, base58_alphabet))
def base58_encode(bindata):
bindata2 = bindata.lstrip(chr(0))
return base58_alphabet[0]*(len(bindata) - len(bindata2)) + bases.natural_to_string(bases.string_to_natural(bindata2), base58_alphabet)
def base58_decode(data):
return chr(0)*(len(data) - len(data.lstrip(base58_alphabet[0]))) + bases.natural_to_string(bases.string_to_natural(data, base58_alphabet))
def base58_encode(data):
return base58_alphabet[0]*(len(data) - len(data.lstrip(chr(0)))) + bases.natural_to_string(bases.string_to_natural(data), base58_alphabet)