101 lines
3.0 KiB
Python
101 lines
3.0 KiB
Python
import hashlib
|
|
import binascii
|
|
|
|
Hash = lambda x: hashlib.sha256(hashlib.sha256(x).digest()).digest()
|
|
|
|
def hash_160(public_key):
|
|
md = hashlib.new('ripemd160')
|
|
md.update(hashlib.sha256(public_key).digest())
|
|
return md.digest()
|
|
|
|
|
|
def hash_160_to_bc_address(h160, address_type):
|
|
vh160 = chr(address_type) + h160
|
|
h = Hash(vh160)
|
|
addr = vh160 + h[0:4]
|
|
return b58encode(addr)
|
|
|
|
def compress_pubkey(public_key):
|
|
if public_key[0] == '\x04':
|
|
return chr((ord(public_key[64]) & 1) + 2) + public_key[1:33]
|
|
raise Exception("Pubkey is already compressed")
|
|
|
|
def public_key_to_bc_address(public_key, address_type, compress=True):
|
|
if public_key[0] == '\x04' and compress:
|
|
public_key = compress_pubkey(public_key)
|
|
|
|
h160 = hash_160(public_key)
|
|
return hash_160_to_bc_address(h160, address_type)
|
|
|
|
__b58chars = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'
|
|
__b58base = len(__b58chars)
|
|
|
|
def b58encode(v):
|
|
""" encode v, which is a string of bytes, to base58."""
|
|
|
|
long_value = 0L
|
|
for (i, c) in enumerate(v[::-1]):
|
|
long_value += (256 ** i) * ord(c)
|
|
|
|
result = ''
|
|
while long_value >= __b58base:
|
|
div, mod = divmod(long_value, __b58base)
|
|
result = __b58chars[mod] + result
|
|
long_value = div
|
|
result = __b58chars[long_value] + result
|
|
|
|
# Bitcoin does a little leading-zero-compression:
|
|
# leading 0-bytes in the input become leading-1s
|
|
nPad = 0
|
|
for c in v:
|
|
if c == '\0':
|
|
nPad += 1
|
|
else:
|
|
break
|
|
|
|
return (__b58chars[0] * nPad) + result
|
|
|
|
def b58decode(v, length):
|
|
""" decode v into a string of len bytes."""
|
|
long_value = 0L
|
|
for (i, c) in enumerate(v[::-1]):
|
|
long_value += __b58chars.find(c) * (__b58base ** i)
|
|
|
|
result = ''
|
|
while long_value >= 256:
|
|
div, mod = divmod(long_value, 256)
|
|
result = chr(mod) + result
|
|
long_value = div
|
|
result = chr(long_value) + result
|
|
|
|
nPad = 0
|
|
for c in v:
|
|
if c == __b58chars[0]:
|
|
nPad += 1
|
|
else:
|
|
break
|
|
|
|
result = chr(0) * nPad + result
|
|
if length is not None and len(result) != length:
|
|
return None
|
|
|
|
return result
|
|
|
|
def monkeypatch_google_protobuf_text_format():
|
|
# monkeypatching: text formatting of protobuf messages
|
|
import google.protobuf.text_format
|
|
import google.protobuf.descriptor
|
|
|
|
_oldPrintFieldValue = google.protobuf.text_format.PrintFieldValue
|
|
|
|
def _customPrintFieldValue(field, value, out, indent=0, as_utf8=False, as_one_line=False):
|
|
if field.cpp_type == google.protobuf.descriptor.FieldDescriptor.CPPTYPE_STRING and \
|
|
str(field.GetOptions()).strip() == '[binary]:': # binary option set
|
|
_oldPrintFieldValue(field, 'hex(%s) str(%s)' % (binascii.hexlify(value), value), out, indent, as_utf8, as_one_line)
|
|
|
|
else:
|
|
_oldPrintFieldValue(field, value, out, indent, as_utf8, as_one_line)
|
|
|
|
google.protobuf.text_format.PrintFieldValue = _customPrintFieldValue
|
|
|