update readme

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diff --git a/frozen_deps/mnemonic/mnemonic.py b/frozen_deps/mnemonic/mnemonic.py
deleted file mode 100644
index e45111b..0000000
--- a/frozen_deps/mnemonic/mnemonic.py
+++ /dev/null
@@ -1,284 +0,0 @@
-#
-# Copyright (c) 2013 Pavol Rusnak
-# Copyright (c) 2017 mruddy
-#
-# 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.
-#
-
-import bisect
-import hashlib
-import hmac
-import itertools
-import os
-from typing import AnyStr, List, Optional, Sequence, TypeVar, Union
-import unicodedata
-
-_T = TypeVar("_T")
-PBKDF2_ROUNDS = 2048
-
-
-class ConfigurationError(Exception):
-    pass
-
-
-# From <https://stackoverflow.com/questions/212358/binary-search-bisection-in-python/2233940#2233940>
-def binary_search(
-    a: Sequence[_T],
-    x: _T,
-    lo: int = 0,
-    hi: Optional[int] = None,  # can't use a to specify default for hi
-) -> int:
-    hi = hi if hi is not None else len(a)  # hi defaults to len(a)
-    pos = bisect.bisect_left(a, x, lo, hi)  # find insertion position
-    return pos if pos != hi and a[pos] == x else -1  # don't walk off the end
-
-
-# Refactored code segments from <https://github.com/keis/base58>
-def b58encode(v: bytes) -> str:
-    alphabet = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz"
-
-    p, acc = 1, 0
-    for c in reversed(v):
-        acc += p * c
-        p = p << 8
-
-    string = ""
-    while acc:
-        acc, idx = divmod(acc, 58)
-        string = alphabet[idx : idx + 1] + string
-    return string
-
-
-class Mnemonic(object):
-    def __init__(self, language: str):
-        self.language = language
-        self.radix = 2048
-        with open(
-            "%s/%s.txt" % (self._get_directory(), language), "r", encoding="utf-8"
-        ) as f:
-            self.wordlist = [w.strip() for w in f.readlines()]
-        if len(self.wordlist) != self.radix:
-            raise ConfigurationError(
-                "Wordlist should contain %d words, but it contains %d words."
-                % (self.radix, len(self.wordlist))
-            )
-
-    @staticmethod
-    def _get_directory() -> str:
-        return os.path.join(os.path.dirname(__file__), "wordlist")
-
-    @classmethod
-    def list_languages(cls) -> List[str]:
-        return [
-            f.split(".")[0]
-            for f in os.listdir(cls._get_directory())
-            if f.endswith(".txt")
-        ]
-
-    @staticmethod
-    def normalize_string(txt: AnyStr) -> str:
-        if isinstance(txt, bytes):
-            utxt = txt.decode("utf8")
-        elif isinstance(txt, str):
-            utxt = txt
-        else:
-            raise TypeError("String value expected")
-
-        return unicodedata.normalize("NFKD", utxt)
-
-    @classmethod
-    def detect_language(cls, code: str) -> str:
-        code = cls.normalize_string(code)
-        first = code.split(" ")[0]
-        languages = cls.list_languages()
-
-        for lang in languages:
-            mnemo = cls(lang)
-            if first in mnemo.wordlist:
-                return lang
-
-        raise ConfigurationError("Language not detected")
-
-    def generate(self, strength: int = 128) -> str:
-        if strength not in [128, 160, 192, 224, 256]:
-            raise ValueError(
-                "Strength should be one of the following [128, 160, 192, 224, 256], but it is not (%d)."
-                % strength
-            )
-        return self.to_mnemonic(os.urandom(strength // 8))
-
-    # Adapted from <http://tinyurl.com/oxmn476>
-    def to_entropy(self, words: Union[List[str], str]) -> bytearray:
-        if not isinstance(words, list):
-            words = words.split(" ")
-        if len(words) not in [12, 15, 18, 21, 24]:
-            raise ValueError(
-                "Number of words must be one of the following: [12, 15, 18, 21, 24], but it is not (%d)."
-                % len(words)
-            )
-        # Look up all the words in the list and construct the
-        # concatenation of the original entropy and the checksum.
-        concatLenBits = len(words) * 11
-        concatBits = [False] * concatLenBits
-        wordindex = 0
-        if self.language == "english":
-            use_binary_search = True
-        else:
-            use_binary_search = False
-        for word in words:
-            # Find the words index in the wordlist
-            ndx = (
-                binary_search(self.wordlist, word)
-                if use_binary_search
-                else self.wordlist.index(word)
-            )
-            if ndx < 0:
-                raise LookupError('Unable to find "%s" in word list.' % word)
-            # Set the next 11 bits to the value of the index.
-            for ii in range(11):
-                concatBits[(wordindex * 11) + ii] = (ndx & (1 << (10 - ii))) != 0
-            wordindex += 1
-        checksumLengthBits = concatLenBits // 33
-        entropyLengthBits = concatLenBits - checksumLengthBits
-        # Extract original entropy as bytes.
-        entropy = bytearray(entropyLengthBits // 8)
-        for ii in range(len(entropy)):
-            for jj in range(8):
-                if concatBits[(ii * 8) + jj]:
-                    entropy[ii] |= 1 << (7 - jj)
-        # Take the digest of the entropy.
-        hashBytes = hashlib.sha256(entropy).digest()
-        hashBits = list(
-            itertools.chain.from_iterable(
-                [c & (1 << (7 - i)) != 0 for i in range(8)] for c in hashBytes
-            )
-        )
-        # Check all the checksum bits.
-        for i in range(checksumLengthBits):
-            if concatBits[entropyLengthBits + i] != hashBits[i]:
-                raise ValueError("Failed checksum.")
-        return entropy
-
-    def to_mnemonic(self, data: bytes) -> str:
-        if len(data) not in [16, 20, 24, 28, 32]:
-            raise ValueError(
-                "Data length should be one of the following: [16, 20, 24, 28, 32], but it is not (%d)."
-                % len(data)
-            )
-        h = hashlib.sha256(data).hexdigest()
-        b = (
-            bin(int.from_bytes(data, byteorder="big"))[2:].zfill(len(data) * 8)
-            + bin(int(h, 16))[2:].zfill(256)[: len(data) * 8 // 32]
-        )
-        result = []
-        for i in range(len(b) // 11):
-            idx = int(b[i * 11 : (i + 1) * 11], 2)
-            result.append(self.wordlist[idx])
-        if self.language == "japanese":  # Japanese must be joined by ideographic space.
-            result_phrase = u"\u3000".join(result)
-        else:
-            result_phrase = " ".join(result)
-        return result_phrase
-
-    def check(self, mnemonic: str) -> bool:
-        mnemonic_list = self.normalize_string(mnemonic).split(" ")
-        # list of valid mnemonic lengths
-        if len(mnemonic_list) not in [12, 15, 18, 21, 24]:
-            return False
-        try:
-            idx = map(
-                lambda x: bin(self.wordlist.index(x))[2:].zfill(11), mnemonic_list
-            )
-            b = "".join(idx)
-        except ValueError:
-            return False
-        l = len(b)  # noqa: E741
-        d = b[: l // 33 * 32]
-        h = b[-l // 33 :]
-        nd = int(d, 2).to_bytes(l // 33 * 4, byteorder="big")
-        nh = bin(int(hashlib.sha256(nd).hexdigest(), 16))[2:].zfill(256)[: l // 33]
-        return h == nh
-
-    def expand_word(self, prefix: str) -> str:
-        if prefix in self.wordlist:
-            return prefix
-        else:
-            matches = [word for word in self.wordlist if word.startswith(prefix)]
-            if len(matches) == 1:  # matched exactly one word in the wordlist
-                return matches[0]
-            else:
-                # exact match not found.
-                # this is not a validation routine, just return the input
-                return prefix
-
-    def expand(self, mnemonic: str) -> str:
-        return " ".join(map(self.expand_word, mnemonic.split(" ")))
-
-    @classmethod
-    def to_seed(cls, mnemonic: str, passphrase: str = "") -> bytes:
-        mnemonic = cls.normalize_string(mnemonic)
-        passphrase = cls.normalize_string(passphrase)
-        passphrase = "mnemonic" + passphrase
-        mnemonic_bytes = mnemonic.encode("utf-8")
-        passphrase_bytes = passphrase.encode("utf-8")
-        stretched = hashlib.pbkdf2_hmac(
-            "sha512", mnemonic_bytes, passphrase_bytes, PBKDF2_ROUNDS
-        )
-        return stretched[:64]
-
-    @staticmethod
-    def to_hd_master_key(seed: bytes, testnet: bool = False) -> str:
-        if len(seed) != 64:
-            raise ValueError("Provided seed should have length of 64")
-
-        # Compute HMAC-SHA512 of seed
-        seed = hmac.new(b"Bitcoin seed", seed, digestmod=hashlib.sha512).digest()
-
-        # Serialization format can be found at: https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki#Serialization_format
-        xprv = b"\x04\x88\xad\xe4"  # Version for private mainnet
-        if testnet:
-            xprv = b"\x04\x35\x83\x94"  # Version for private testnet
-        xprv += b"\x00" * 9  # Depth, parent fingerprint, and child number
-        xprv += seed[32:]  # Chain code
-        xprv += b"\x00" + seed[:32]  # Master key
-
-        # Double hash using SHA256
-        hashed_xprv = hashlib.sha256(xprv).digest()
-        hashed_xprv = hashlib.sha256(hashed_xprv).digest()
-
-        # Append 4 bytes of checksum
-        xprv += hashed_xprv[:4]
-
-        # Return base58
-        return b58encode(xprv)
-
-
-def main() -> None:
-    import sys
-
-    if len(sys.argv) > 1:
-        hex_data = sys.argv[1]
-    else:
-        hex_data = sys.stdin.readline().strip()
-    data = bytes.fromhex(hex_data)
-    m = Mnemonic("english")
-    print(m.to_mnemonic(data))
-
-
-if __name__ == "__main__":
-    main()