Python Bitcoin Address Generator Compressed Keys

15.12.2020

Python Bitcoin Address Generator Compressed Keys Rating: 7,4/10 5907 reviews

Jul 16, 2018 What we get is 17JsmEygbbEUEpvt4PFtYaTeSqfb9ki1F1, a compressed Bitcoin wallet address. The wallet key generation process can be split into four steps: creating a public key with ECDSA; encrypting the key with SHA-256 and RIPEMD-160; calculating the checksum with double SHA-256; encoding the key with Base58.

bitwalletrecover.py - recover compressed private keys from your bitcoin wallet. Requires python3, pycoin (https://pypi.python.org/pypi/pycoin), and base58 (https://pypi.python.org/pypi/base58).

I wanted to learn how to create a Bitcoin wallet in code. I used as reference this guide which has code examples in JavaScript. I wrote my implementation in Python. Here is the resulting code: #!.
Bitcoin Key Compression Tool. This tool converts between compressed and uncompressed bitcoin keys. The main purpose is as a diagnostic tool.

bitwalletrecover.py

importre

importhashlib

importbase58

frompycoin.ecdsaimportgenerator_secp256k1, public_pair_for_secret_exponent

defbytetohex(byteStr):

return'.join( [ '%02X'%xforxinbyteStr ] ).strip()

litecoin= [b'x30', b'xb0']

bitcoin= [b'x00', b'x80']

cointype=litecoin

walletHandle=open('C:/Users/alex/Downloads/litecoin-0.8.5.1-win32-setup/data/wallet.dat', 'rb')

wallet=walletHandle.read()

privKeys=set(re.findall(b'x70x6Fx6Fx6C(.{52})', wallet))

print('Found %d privKeys'%len(privKeys))

forkeyinprivKeys:

key=key[20:]

public_x, public_y=public_pair_for_secret_exponent(generator_secp256k1, int(bytetohex(key), 16))

compressed_public_key=bytes.fromhex('%02x%064x'% (2+ (public_y&1), public_x))

#https://en.bitcoin.it/wiki/Technical_background_of_Bitcoin_addresses

m=hashlib.new('ripemd160')

m.update(hashlib.sha256(compressed_public_key).digest())

ripe=m.digest() # Step 2 & 3

extRipe=cointype[0] +ripe# Step 4

chksum=hashlib.sha256(hashlib.sha256(extRipe).digest()).digest()[:4] # Step 5-7

addr=extRipe+chksum# Step 8

print('Address:', base58.b58encode(addr))

# compressed wallet import format http://sourceforge.net/mailarchive/forum.php?thread_name=CAPg%2BsBhDFCjAn1tRRQhaudtqwsh4vcVbxzm%2BAA2OuFxN71fwUA%40mail.gmail.com&forum_name=bitcoin-development

key=cointype[1] +key+b'x01'

chksum=hashlib.sha256(hashlib.sha256(key).digest()).digest()[:4]

addr=key+chksum# Step 8

print('Private Key:', base58.b58encode(addr),'n')

walletHandle.close()

Bitcoin Wallet Address Generator

This is a simple Bitcoin wallet address generator coded in Python 3.It generates a Private Key in different formats (hex, wif and compressed wif) and corresponding Public Addresses, raw, P2WPKH addresses starting with prefix 1, P2SH addresses starting with prefix 3 as part of Segwit soft fork and Bech32 addresses with prefix bc1 P2WPKH and P2WSH.

Installation

Usage

Example 1

Output:

Example 2