forked from ahmedbodi/p2pool-vert-dev
-
Notifications
You must be signed in to change notification settings - Fork 51
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Merge pull request #30 from deluxes/master
Bech32 + P2SH Address support
Showing
11 changed files
with
221 additions
and
45 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,123 @@ | ||
# Copyright (c) 2017 Pieter Wuille | ||
# | ||
# Permission is hereby granted, free of charge, to any person obtaining a copy | ||
# of this software and associated documentation files (the "Software"), to deal | ||
# in the Software without restriction, including without limitation the rights | ||
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
# copies of the Software, and to permit persons to whom the Software is | ||
# furnished to do so, subject to the following conditions: | ||
# | ||
# The above copyright notice and this permission notice shall be included in | ||
# all copies or substantial portions of the Software. | ||
# | ||
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
# THE SOFTWARE. | ||
|
||
"""Reference implementation for Bech32 and segwit addresses.""" | ||
|
||
|
||
CHARSET = "qpzry9x8gf2tvdw0s3jn54khce6mua7l" | ||
|
||
|
||
def bech32_polymod(values): | ||
"""Internal function that computes the Bech32 checksum.""" | ||
generator = [0x3b6a57b2, 0x26508e6d, 0x1ea119fa, 0x3d4233dd, 0x2a1462b3] | ||
chk = 1 | ||
for value in values: | ||
top = chk >> 25 | ||
chk = (chk & 0x1ffffff) << 5 ^ value | ||
for i in range(5): | ||
chk ^= generator[i] if ((top >> i) & 1) else 0 | ||
return chk | ||
|
||
|
||
def bech32_hrp_expand(hrp): | ||
"""Expand the HRP into values for checksum computation.""" | ||
return [ord(x) >> 5 for x in hrp] + [0] + [ord(x) & 31 for x in hrp] | ||
|
||
|
||
def bech32_verify_checksum(hrp, data): | ||
"""Verify a checksum given HRP and converted data characters.""" | ||
return bech32_polymod(bech32_hrp_expand(hrp) + data) == 1 | ||
|
||
|
||
def bech32_create_checksum(hrp, data): | ||
"""Compute the checksum values given HRP and data.""" | ||
values = bech32_hrp_expand(hrp) + data | ||
polymod = bech32_polymod(values + [0, 0, 0, 0, 0, 0]) ^ 1 | ||
return [(polymod >> 5 * (5 - i)) & 31 for i in range(6)] | ||
|
||
|
||
def bech32_encode(hrp, data): | ||
"""Compute a Bech32 string given HRP and data values.""" | ||
combined = data + bech32_create_checksum(hrp, data) | ||
return hrp + '1' + ''.join([CHARSET[d] for d in combined]) | ||
|
||
|
||
def bech32_decode(bech): | ||
"""Validate a Bech32 string, and determine HRP and data.""" | ||
if ((any(ord(x) < 33 or ord(x) > 126 for x in bech)) or | ||
(bech.lower() != bech and bech.upper() != bech)): | ||
return (None, None) | ||
bech = bech.lower() | ||
pos = bech.rfind('1') | ||
if pos < 1 or pos + 7 > len(bech) or len(bech) > 90: | ||
return (None, None) | ||
if not all(x in CHARSET for x in bech[pos+1:]): | ||
return (None, None) | ||
hrp = bech[:pos] | ||
data = [CHARSET.find(x) for x in bech[pos+1:]] | ||
if not bech32_verify_checksum(hrp, data): | ||
return (None, None) | ||
return (hrp, data[:-6]) | ||
|
||
|
||
def convertbits(data, frombits, tobits, pad=True): | ||
"""General power-of-2 base conversion.""" | ||
acc = 0 | ||
bits = 0 | ||
ret = [] | ||
maxv = (1 << tobits) - 1 | ||
max_acc = (1 << (frombits + tobits - 1)) - 1 | ||
for value in data: | ||
if value < 0 or (value >> frombits): | ||
return None | ||
acc = ((acc << frombits) | value) & max_acc | ||
bits += frombits | ||
while bits >= tobits: | ||
bits -= tobits | ||
ret.append((acc >> bits) & maxv) | ||
if pad: | ||
if bits: | ||
ret.append((acc << (tobits - bits)) & maxv) | ||
elif bits >= frombits or ((acc << (tobits - bits)) & maxv): | ||
return None | ||
return ret | ||
|
||
|
||
def decode(hrp, addr): | ||
"""Decode a segwit address.""" | ||
hrpgot, data = bech32_decode(addr) | ||
if hrpgot != hrp: | ||
return (None, None) | ||
decoded = convertbits(data[1:], 5, 8, False) | ||
if decoded is None or len(decoded) < 2 or len(decoded) > 40: | ||
return (None, None) | ||
if data[0] > 16: | ||
return (None, None) | ||
if data[0] == 0 and len(decoded) != 20 and len(decoded) != 32: | ||
return (None, None) | ||
return (data[0], decoded) | ||
|
||
|
||
def encode(hrp, witver, witprog): | ||
"""Encode a segwit address.""" | ||
ret = bech32_encode(hrp, [witver] + convertbits(witprog, 8, 5)) | ||
if decode(hrp, ret) == (None, None): | ||
return None | ||
return ret |
Oops, something went wrong.