-
-
Save amankharwal/f61ab2949cac29c227b8bf68a03aae6e 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
from hashlib import sha256 | |
MAX_NONCE = 100000000000 | |
def SHA256(text): | |
return sha256(text.encode("ascii")).hexdigest() | |
def mine(block_number, transactions, previous_hash, prefix_zeros): | |
prefix_str = '0'*prefix_zeros | |
for nonce in range(MAX_NONCE): | |
text = str(block_number) + transactions + previous_hash + str(nonce) | |
new_hash = SHA256(text) | |
if new_hash.startswith(prefix_str): | |
print(f"Yay! Successfully mined bitcoins with nonce value:{nonce}") | |
return new_hash | |
raise BaseException(f"Couldn't find correct has after trying {MAX_NONCE} times") | |
if __name__=='__main__': | |
transactions=''' | |
Kharwal->Aman->20, | |
Amazon->Google->45 | |
''' | |
difficulty=4 # try changing this to higher number and you will see it will take more time for mining as difficulty increases | |
import time | |
start = time.time() | |
print("start mining") | |
new_hash = mine(5,transactions,'0000000xa036944e29568d0cff17edbe038f81208fecf9a66be9a2b8321c6ec7', difficulty) #previous hash of already mined bitcoin | |
total_time = str((time.time() - start)) | |
print(f"end mining. Mining took: {total_time} seconds") | |
print(new_hash) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment