update frozen deps

3 files changed, 178 insertions, 0 deletions

diff --git a/frozen_deps/base58/__init__.py b/frozen_deps/base58/__init__.py
new file mode 100644
index 0000000..ff2fa18
--- /dev/null
+++ b/frozen_deps/base58/__init__.py
@@ -0,0 +1,130 @@
+'''Base58 encoding
+
+Implementations of Base58 and Base58Check encodings that are compatible
+with the bitcoin network.
+'''
+
+# This module is based upon base58 snippets found scattered over many bitcoin
+# tools written in python. From what I gather the original source is from a
+# forum post by Gavin Andresen, so direct your praise to him.
+# This module adds shiny packaging and support for python3.
+
+from hashlib import sha256
+from typing import Union
+
+__version__ = '2.0.1'
+
+# 58 character alphabet used
+BITCOIN_ALPHABET = \
+    b'123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'
+RIPPLE_ALPHABET = b'rpshnaf39wBUDNEGHJKLM4PQRST7VWXYZ2bcdeCg65jkm8oFqi1tuvAxyz'
+
+# Retro compatibility
+alphabet = BITCOIN_ALPHABET
+
+
+def scrub_input(v: Union[str, bytes]) -> bytes:
+    if isinstance(v, str):
+        v = v.encode('ascii')
+
+    return v
+
+
+def b58encode_int(
+    i: int, default_one: bool = True, alphabet: bytes = BITCOIN_ALPHABET
+) -> bytes:
+    """
+    Encode an integer using Base58
+    """
+    if not i and default_one:
+        return alphabet[0:1]
+    string = b""
+    while i:
+        i, idx = divmod(i, 58)
+        string = alphabet[idx:idx+1] + string
+    return string
+
+
+def b58encode(
+    v: Union[str, bytes], alphabet: bytes = BITCOIN_ALPHABET
+) -> bytes:
+    """
+    Encode a string using Base58
+    """
+    v = scrub_input(v)
+
+    nPad = len(v)
+    v = v.lstrip(b'\0')
+    nPad -= len(v)
+
+    p, acc = 1, 0
+    for c in reversed(v):
+        acc += p * c
+        p = p << 8
+    result = b58encode_int(acc, default_one=False, alphabet=alphabet)
+    return alphabet[0:1] * nPad + result
+
+
+def b58decode_int(
+    v: Union[str, bytes], alphabet: bytes = BITCOIN_ALPHABET
+) -> int:
+    """
+    Decode a Base58 encoded string as an integer
+    """
+    v = v.rstrip()
+    v = scrub_input(v)
+
+    decimal = 0
+    for char in v:
+        decimal = decimal * 58 + alphabet.index(char)
+    return decimal
+
+
+def b58decode(
+    v: Union[str, bytes], alphabet: bytes = BITCOIN_ALPHABET
+) -> bytes:
+    """
+    Decode a Base58 encoded string
+    """
+    v = v.rstrip()
+    v = scrub_input(v)
+
+    origlen = len(v)
+    v = v.lstrip(alphabet[0:1])
+    newlen = len(v)
+
+    acc = b58decode_int(v, alphabet=alphabet)
+
+    result = []
+    while acc > 0:
+        acc, mod = divmod(acc, 256)
+        result.append(mod)
+
+    return b'\0' * (origlen - newlen) + bytes(reversed(result))
+
+
+def b58encode_check(
+    v: Union[str, bytes], alphabet: bytes = BITCOIN_ALPHABET
+) -> bytes:
+    """
+    Encode a string using Base58 with a 4 character checksum
+    """
+    v = scrub_input(v)
+
+    digest = sha256(sha256(v).digest()).digest()
+    return b58encode(v + digest[:4], alphabet=alphabet)
+
+
+def b58decode_check(
+    v: Union[str, bytes], alphabet: bytes = BITCOIN_ALPHABET
+) -> bytes:
+    '''Decode and verify the checksum of a Base58 encoded string'''
+
+    result = b58decode(v, alphabet=alphabet)
+    result, check = result[:-4], result[-4:]
+    digest = sha256(sha256(result).digest()).digest()
+
+    if check != digest[:4]:
+        raise ValueError("Invalid checksum")
+
+    return result
diff --git a/frozen_deps/base58/__main__.py b/frozen_deps/base58/__main__.py
new file mode 100644
index 0000000..b76fdad
--- /dev/null
+++ b/frozen_deps/base58/__main__.py
@@ -0,0 +1,47 @@
+import argparse
+import sys
+
+from base58 import b58decode, b58decode_check, b58encode, b58encode_check
+
+
+def main():
+    '''Base58 encode or decode FILE, or standard input, to standard output.'''
+
+    stdout = sys.stdout.buffer
+
+    parser = argparse.ArgumentParser(description=main.__doc__)
+    parser.add_argument(
+        'file',
+        metavar='FILE',
+        nargs='?',
+        type=argparse.FileType('r'),
+        default='-')
+    parser.add_argument(
+        '-d', '--decode',
+        action='store_true',
+        help='decode data')
+    parser.add_argument(
+        '-c', '--check',
+        action='store_true',
+        help='append a checksum before encoding')
+
+    args = parser.parse_args()
+    fun = {
+        (False, False): b58encode,
+        (False, True): b58encode_check,
+        (True, False): b58decode,
+        (True, True): b58decode_check
+    }[(args.decode, args.check)]
+
+    data = args.file.buffer.read()
+
+    try:
+        result = fun(data)
+    except Exception as e:
+        sys.exit(e)
+
+    stdout.write(result)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/frozen_deps/base58/py.typed b/frozen_deps/base58/py.typed
new file mode 100644
index 0000000..e5aff4f
--- /dev/null
+++ b/frozen_deps/base58/py.typed
@@ -0,0 +1 @@
+# Marker file for PEP 561.
\ No newline at end of file