- [1 Installation](#1-installation)
- [2 Usage](#2-usage)
+ - [2.1 Create entropy](#21-create-entropy)
+ - [Create mnemonics](#create-mnemonics)
Python3 implementation of the Bytom protocol.
## 2 Usage
+### 2.1 Create entropy
+
+get_entropy() create 128bits entropy.
+
+```python
+>>> from pybtm import key
+>>> key.get_entropy()
+'100e2704b431f914e3262926bdba6fce'
+```
+
+### Create mnemonics
+
+```python
+
+```
\ No newline at end of file
import random
+import hashlib
def get_entropy():
entropy = random.randint(0, 2**128)
entropy_hexstr = entropy.to_bytes(16, byteorder='big').hex()
- return entropy_hexstr
\ No newline at end of file
+ return entropy_hexstr
+
+
+# get_mnemonic create mnemonic from 128 bits entropy(the entropy_hexstr length is 32)
+# return 12 mnemonics
+# You can get more test data from: https://gist.github.com/zcc0721/63aeb5143807950f7b7051fadc08cef0
+# test data 1:
+# entropy_hexstr: 1db8b283eb4623e749732a341396e0c9
+# mnemonic_str: buffalo sheriff path story giraffe victory chair grab cross original return napkin
+# test data 2:
+# entropy_hexstr: 4d33735a9e92f634d22aecbb4044038d
+# mnemonic_str: essay oppose stove diamond control bounce emerge frown robust acquire abstract brick
+# test data 3:
+# entropy_hexstr: 089fe9bf0cac76760bc4b131d938669e
+# mnemonic_str: ancient young hurt bone shuffle deposit congress normal crack six boost despair
+def get_mnemonic(entropy_hexstr=None):
+ if entropy_hexstr is None:
+ entropy_hexstr = get_entropy()
+ mnemonic_str = ""
+ mnemonic_length = 12
+
+ # create a 12 elements mnemonic_list
+ mnemonic_list = []
+ for _ in range(mnemonic_length):
+ mnemonic_list.append('')
+
+ entropy_bytes = bytes.fromhex(entropy_hexstr[:32])
+ checksum = hashlib.sha256(entropy_bytes).hexdigest()[:1]
+ new_entropy_str = "0" + entropy_hexstr[:32] + checksum
+ new_entropy_bytes = bytes.fromhex(new_entropy_str)
+ new_entropy_int = int.from_bytes(new_entropy_bytes, byteorder='big')
+
+ file = open('english_mnemonic.txt', mode='r')
+ word_list = file.readlines()
+ file.close()
+
+ for i in range(11, -1, -1):
+ word_index = new_entropy_int % 2048
+ new_entropy_int = new_entropy_int >> 11
+ mnemonic_list[i] = word_list[word_index]
+
+ for i in range(12):
+ mnemonic_str += mnemonic_list[i][:-1]
+ mnemonic_str += " "
+ return mnemonic_str[:-1]
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