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Commit 0b4631c

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Merge pull request avinashkranjan#605 from NEERAJAP2001/Bitcoin_Mining
Create Bitcoin mining Script
2 parents 2afe21c + 168ee46 commit 0b4631c

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‎BitCoin Mining/BitCoin_Mining.py

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# INPUT : Transactions = '''Neeraj->Zara->50,Nandu->Allu->5''' , difficulty=2 ,
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# Previous_hash = a7sdxa036944e29568d0cff17edbe038f81208fecf9a66be9a2b8321c6ec7
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# OUTPUT : Successfully mined bitcoins with nonce value:336 end mining. Mining took: 12.207852363586426 seconds
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# 006f74cef9d071afa15c58b38198be14f9b4aabb4cd6f7a44afffd9f6968efcd
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# Import the sha256 function
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from hashlib import sha256
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# Nonce value
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MAX_NONCE = 10000
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# Function for encoding text to a 64 bit hexadecimal value
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def SHA256(text):
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return sha256(text.encode("ascii")).hexdigest()
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# function for guessing nonce value
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def mine(block_number, transactions, previous_hash, prefix_zeros):
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# string with difficulty zeroes
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prefix_str = '0'*prefix_zeros
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# nonce is the value we want
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for nonce in range(MAX_NONCE):
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# concatinating the string and encoding it
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text = str(block_number) + transactions + previous_hash + str(nonce)
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new_hash = SHA256(text)
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# if matched the mined successfully
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if new_hash.startswith(prefix_str):
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print(f"Successfully mined bitcoins with nonce value:{nonce}")
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return new_hash
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# might raise exception due to hardware issues etc
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raise BaseException(f"Couldn't find correct has after trying {MAX_NONCE} times")
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# Driver Code
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if __name__=='__main__':
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# Transactions string
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transactions=input('Enter Transactions : ')
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# Number of prefix zeroes
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difficulty=int(input('Enter Difficulty level : '))
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# For knowing time taken for mining
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import time
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start = time.time()
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print("start mining")
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previous_hash=input('Enter Previous has value : ')
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# Calling mine function with all required parameters
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new_hash = mine(5,transactions,previous_hash, difficulty)
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# total time for refrence
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total_time = str((time.time() - start))
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print(f"end mining. Mining took: {total_time} seconds")
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print(new_hash)

‎BitCoin Mining/README.md

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# What Is Bitcoin Mining?
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Bitcoin mining is performed by high-powered computers that solve complex computational math problems , these problems are so complex that they cannot be solved by hand and are complicated enough to tax even incredibly powerful computers.
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# Terminology :
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1. Transaction : An transaction is a transfer of Bitcoin value and are collected in Blocks
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2. SHA256: a function which can generate an almost-unique 256-bit (32-byte) signature(Hexa-Decimal) for a text.
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3. Block: Blocks are files where data pertaining to the Bitcoin network are permanently recorded
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4. Nonce : Miners have to guess this number which will reward them Btc , A nonce is an abbreviation for "number only used once," which is a number added to a hashed—or encrypted—block in a blockchain that, when rehashed, meets the difficulty level restrictions.
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5. Difficulty Level : Number of prefix Contagiuos Zeroes
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# Theory :
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Btc will be rewarded if Nonce gives us string with prefix of Zeroes the difficult number of times. sounds confusing?
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So,Let's take example :
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1. Let's assume we have difficulty level = 20
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2. Now, Let's again assume that we have previous hash as : 'a5x208fecf9a66be9a2bc7...'
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3. Now we create text as : text = str(block_number) + transactions + previous_hash + str(nonce)
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4. Now we pass text to SHA256 Function to generate hash
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5. Finally, that hash prefix must be equal to number of zeroes as difficulty level.
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6. And Boom!! You have mined succesfully.
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# Draw Backs:
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The script has no drawbacks but due to increase in miners , the difficultly level increases and hence we'd require best hardware as fastest wins.
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# Refrences:
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https://www.investopedia.com/terms/b/bitcoin.asp
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https://www.youtube.com/watch?v=wTC31ZI6QM4
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https://www.youtube.com/watch?v=ZhnJ1bkIWWk&t=143s
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