Created
June 11, 2022 17:15
-
-
Save lumunge/289743aed153dae1e6826828606ebbae to your computer and use it in GitHub Desktop.
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
import hashlib | |
import time | |
# text = "Bitcoin mining uses the SHA256 hashing algorithm" | |
# text_hash = hashlib.sha256(text.encode('utf-8')).hexdigest() | |
# print(text_hash) | |
# def findNonce(text): | |
# for nonce in range(20): | |
# n = text + str(nonce) | |
# hash = hashlib.sha256(n.encode('utf-8')).hexdigest() | |
# print(f'{nonce} : {hash}') | |
# findNonce(text) | |
def proof_of_work(header, difficulty_bits, max_nonce): | |
target = 2 ** (256-difficulty_bits) # difficulty target | |
for nonce in range(max_nonce): | |
to_hash = (str(header) + str(nonce)).encode('utf-8') | |
hashed = hashlib.sha256(to_hash).hexdigest() | |
if int(hashed, 16) < target: # valid result less than target | |
print(f"### SUCCESS ### {nonce}") | |
print(f"Nonce: {nonce}\nHashed Result: {hashed}") | |
return (hashed, nonce) | |
print(f"### FAILED after {nonce} (max_nonce) tries ###") | |
return nonce | |
def solve(nonce, hashed): | |
for difficulty_bits in range(32): # difficulty from 0 - 31 bits | |
difficulty = 2 ** difficulty_bits | |
print("### Mining Started...") | |
print(f"Difficulty: {difficulty} ({difficulty_bits} bits)") | |
start = time.time() | |
block = 'Random test block header with transactions' + hashed | |
max_nonce = 2 ** 32 # 4 billion | |
hashed, nonce = proof_of_work(block, difficulty_bits, max_nonce) # get valid nonce | |
end = time.time() | |
elapsed_time = end - start | |
print(f"Took: {elapsed_time:.4f} seconds") | |
if elapsed_time > 0: | |
hash_power = float(int(nonce) / elapsed_time) # hashes/second | |
print(f"Hashing Power: {hash_power} hashes/second") | |
print() | |
if __name__ == '__main__': | |
solve(0, '') |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment