Created
February 20, 2018 09:43
-
-
Save jaymine/367b5b81375d2be39b329f7470e48873 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
#!/usr/bin/python | |
from binascii import unhexlify | |
from hashlib import sha256 | |
import json | |
import urllib2 | |
import sys | |
#convert into little endian format | |
def littleEndian(string): | |
splited = [str(string)[i:i + 2] for i in range(0, len(str(string)), 2)] | |
splited.reverse() | |
return "".join(splited) | |
helpMessage = 'Please give arguments to read the block data\nTo read the block as a json file\n-f <fileName>\nTo read the block from a url as a json body\n-i <url>\n' | |
if (len(sys.argv) < 3): | |
print helpMessage | |
sys.exit() | |
elif sys.argv[1] == '-f': | |
response = json.load(open(sys.argv[2])) | |
elif sys.argv[1] == '-i': | |
response = json.loads(urllib2.urlopen(sys.argv[2]).read()) | |
version = '01000000' | |
little_endian_previousHash = littleEndian(response['prev_block']) | |
little_endian_merkleRoot = littleEndian(response['mrkl_root']) | |
little_endian_time = littleEndian(hex(response['time'])[2:]) | |
little_endian_difficultyBits = littleEndian(hex(response['bits'])[2:]) | |
little_endian_nonce = littleEndian(hex(response['nonce'])[2:]) | |
#append | |
header = version + little_endian_previousHash + little_endian_merkleRoot + little_endian_time + little_endian_difficultyBits + little_endian_nonce | |
header = unhexlify(header) | |
#sent hash by the miner | |
Responsehash = littleEndian(response['hash']) | |
#calculated hash | |
CalculatedHash = sha256(sha256(header).digest()).hexdigest() | |
#verify the hash is smaller than the target | |
solved = 'Hash is smaller than the target' if Responsehash <= little_endian_difficultyBits else 'Hash is larger than the target' | |
print solved | |
#Equality of the calculated and received hashes | |
state = 'Hash of the block is acceptable.' if Responsehash == CalculatedHash else 'Hash of the block is not acceptable.' | |
print state |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment