mirror of
https://github.com/bitcoinbook/bitcoinbook
synced 2024-12-23 07:08:13 +00:00
Merge pull request #366 from cclauss/patch-1
long(), print(), xrange() for Python 3
This commit is contained in:
Will Binns
GitHub
commit
ce1b4904d6
@ -17,15 +17,15 @@ while (line[0] != "|"):
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line = f.readline()
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while (line[1] == '-'):
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line_num = f.readline()
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line_layer = f.readline()[2:-1]
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line_title = f.readline()[2:-1]
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line_owner = f.readline()[2:-1]
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line_type = f.readline()[2:-1]
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line_num = f.readline()
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line_layer = f.readline()[2:-1]
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line_title = f.readline()[2:-1]
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line_owner = f.readline()[2:-1]
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line_type = f.readline()[2:-1]
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line_status = f.readline()[2:-1]
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line = f.readline()
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line = f.readline()
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while (line[0] != "|"):
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line = f.readline()
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line = f.readline()
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num = regex_num.match(line_num)
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alt_num = regex_altnum.match(line_num)
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@ -34,6 +34,10 @@ while (line[1] == '-'):
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elif alt_num:
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bip_num = alt_num.group(1)
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print "|[[bip-{0}]]https://github.com/bitcoin/bips/blob/master/bip-{0:04d}.mediawiki[BIP-{0}] |{1} |{2} |{3} |{4} ".format(int(bip_num), line_title, line_owner, line_type, line_status)
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print("|[[bip-{0}]]https://github.com/bitcoin/bips/blob/master/bip-{0:04d}"
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".mediawiki[BIP-{0}] |{1} |{2} |{3} |{4} ".format(int(bip_num),
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line_title,
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line_owner,
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line_type,
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line_status))
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f.close()
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@ -25,4 +25,7 @@ resp = requests.get('https://blockchain.info/unspent?active=%s' % address)
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utxo_set = json.loads(resp.text)["unspent_outputs"]
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for utxo in utxo_set:
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print "%s:%d - %ld Satoshis" % (utxo['tx_hash'], utxo['tx_output_n'], utxo['value'])
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print("%s:%d - %ld Satoshis" % (utxo['tx_hash'], utxo['tx_output_n'],
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utxo['value']))
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# Or try...
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# print("{tx_hash}:{tx_output_n} - {value} Satoshis".format(**utxo))
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@ -6,7 +6,7 @@ import hashlib
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text = "I am Satoshi Nakamoto"
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# iterate nonce from 0 to 19
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for nonce in xrange(20):
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for nonce in range(20):
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# add the nonce to the end of the text
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input = text + str(nonce)
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@ -15,4 +15,4 @@ for nonce in xrange(20):
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hash = hashlib.sha256(input).hexdigest()
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# show the input and hash result
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print input, '=>', hash
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print(input, '=>', hash)
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@ -5,45 +5,41 @@ valid_private_key = False
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while not valid_private_key:
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private_key = bitcoin.random_key()
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decoded_private_key = bitcoin.decode_privkey(private_key, 'hex')
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valid_private_key = 0 < decoded_private_key < bitcoin.N
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valid_private_key = 0 < decoded_private_key < bitcoin.N
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print "Private Key (hex) is: ", private_key
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print "Private Key (decimal) is: ", decoded_private_key
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print("Private Key (hex) is: ", private_key)
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print("Private Key (decimal) is: ", decoded_private_key)
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# Convert private key to WIF format
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wif_encoded_private_key = bitcoin.encode_privkey(decoded_private_key, 'wif')
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print "Private Key (WIF) is: ", wif_encoded_private_key
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print("Private Key (WIF) is: ", wif_encoded_private_key)
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# Add suffix "01" to indicate a compressed private key
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compressed_private_key = private_key + '01'
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print "Private Key Compressed (hex) is: ", compressed_private_key
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print("Private Key Compressed (hex) is: ", compressed_private_key)
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# Generate a WIF format from the compressed private key (WIF-compressed)
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wif_compressed_private_key = bitcoin.encode_privkey(
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bitcoin.decode_privkey(compressed_private_key, 'hex'), 'wif')
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print "Private Key (WIF-Compressed) is: ", wif_compressed_private_key
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print("Private Key (WIF-Compressed) is: ", wif_compressed_private_key)
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# Multiply the EC generator point G with the private key to get a public key point
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public_key = bitcoin.fast_multiply(bitcoin.G, decoded_private_key)
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print "Public Key (x,y) coordinates is:", public_key
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print("Public Key (x,y) coordinates is:", public_key)
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# Encode as hex, prefix 04
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hex_encoded_public_key = bitcoin.encode_pubkey(public_key,'hex')
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print "Public Key (hex) is:", hex_encoded_public_key
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hex_encoded_public_key = bitcoin.encode_pubkey(public_key, 'hex')
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print("Public Key (hex) is:", hex_encoded_public_key)
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# Compress public key, adjust prefix depending on whether y is even or odd
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(public_key_x, public_key_y) = public_key
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if (public_key_y % 2) == 0:
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compressed_prefix = '02'
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else:
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compressed_prefix = '03'
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compressed_prefix = '02' if (public_key_y % 2) == 0 else '03'
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hex_compressed_public_key = compressed_prefix + bitcoin.encode(public_key_x, 16)
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print "Compressed Public Key (hex) is:", hex_compressed_public_key
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print("Compressed Public Key (hex) is:", hex_compressed_public_key)
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# Generate bitcoin address from public key
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print "Bitcoin Address (b58check) is:", bitcoin.pubkey_to_address(public_key)
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print("Bitcoin Address (b58check) is:", bitcoin.pubkey_to_address(public_key))
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# Generate compressed bitcoin address from compressed public key
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print "Compressed Bitcoin Address (b58check) is:", \
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bitcoin.pubkey_to_address(hex_compressed_public_key)
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print("Compressed Bitcoin Address (b58check) is:",
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bitcoin.pubkey_to_address(hex_compressed_public_key))
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@ -3,6 +3,7 @@ start_block_reward = 50
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# 210000 is around every 4 years with a 10 minute block interval
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reward_interval = 210000
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def max_money():
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# 50 BTC = 50 0000 0000 Satoshis
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current_reward = 50 * 10**8
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@ -12,5 +13,5 @@ def max_money():
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current_reward /= 2
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return total
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print "Total BTC to ever be created:", max_money(), "Satoshis"
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print("Total BTC to ever be created:", max_money(), "Satoshis")
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@ -4,60 +4,61 @@
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import hashlib
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import time
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max_nonce = 2 ** 32 # 4 billion
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try:
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long # Python 2
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xrange
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except NameError:
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long = int # Python 3
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xrange = range
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max_nonce = 2 ** 32 # 4 billion
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def proof_of_work(header, difficulty_bits):
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# calculate the difficulty target
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target = 2 ** (256-difficulty_bits)
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target = 2 ** (256 - difficulty_bits)
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for nonce in xrange(max_nonce):
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hash_result = hashlib.sha256(str(header)+str(nonce)).hexdigest()
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hash_result = hashlib.sha256(str(header) + str(nonce)).hexdigest()
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# check if this is a valid result, below the target
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if long(hash_result, 16) < target:
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print "Success with nonce %d" % nonce
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print "Hash is %s" % hash_result
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return (hash_result,nonce)
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print "Failed after %d (max_nonce) tries" % nonce
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print("Success with nonce %d" % nonce)
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print("Hash is %s" % hash_result)
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return (hash_result, nonce)
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print("Failed after %d (max_nonce) tries" % nonce)
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return nonce
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if __name__ == '__main__':
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nonce = 0
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hash_result = ''
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# difficulty from 0 to 31 bits
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# difficulty from 0 to 31 bits
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for difficulty_bits in xrange(32):
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difficulty = 2 ** difficulty_bits
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print "Difficulty: %ld (%d bits)" % (difficulty, difficulty_bits)
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print "Starting search..."
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print("Difficulty: %ld (%d bits)" % (difficulty, difficulty_bits))
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print("Starting search...")
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# checkpoint the current time
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start_time = time.time()
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# make a new block which includes the hash from the previous block
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# we fake a block of transactions - just a string
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new_block = 'test block with transactions' + hash_result
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new_block = 'test block with transactions' + hash_result
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# find a valid nonce for the new block
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(hash_result, nonce) = proof_of_work(new_block, difficulty_bits)
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(hash_result, nonce) = proof_of_work(new_block, difficulty_bits)
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# checkpoint how long it took to find a result
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end_time = time.time()
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elapsed_time = end_time - start_time
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print "Elapsed Time: %.4f seconds" % elapsed_time
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print("Elapsed Time: %.4f seconds" % elapsed_time)
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if elapsed_time > 0:
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# estimate the hashes per second
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hash_power = float(long(nonce)/elapsed_time)
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print "Hashing Power: %ld hashes per second" % hash_power
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hash_power = float(long(nonce) / elapsed_time)
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print("Hashing Power: %ld hashes per second" % hash_power)
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@ -2,8 +2,13 @@
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from sys import argv
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class OutputInfo:
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try:
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long # Python 2
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except NameError:
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long = int # Python 3
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class OutputInfo:
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def __init__(self, tx_hash, tx_index, value):
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self.tx_hash = tx_hash
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self.tx_index = tx_index
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@ -13,6 +18,7 @@ class OutputInfo:
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return "<%s:%s with %s Satoshis>" % (self.tx_hash, self.tx_index,
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self.value)
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# Select optimal outputs for a send from unspent outputs list.
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# Returns output list and remaining change to be sent to
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# a change address.
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@ -44,6 +50,7 @@ def select_outputs_greedy(unspent, min_value):
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# No results found.
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return None, 0
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def main():
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unspent = [
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OutputInfo("ebadfaa92f1fd29e2fe296eda702c48bd11ffd52313e986e99ddad9084062167", 1, 8000000),
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@ -54,15 +61,11 @@ def main():
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OutputInfo("12b6a7934c1df821945ee9ee3b3326d07ca7a65fd6416ea44ce8c3db0c078c64", 0, 10000000),
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OutputInfo("7f42eda67921ee92eae5f79bd37c68c9cb859b899ce70dba68c48338857b7818", 0, 16100000),
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]
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if len(argv) > 1:
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target = long(argv[1])
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else:
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target = 55000000
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print "For transaction amount %d Satoshis (%f bitcoin) use: " % (target, target/10.0**8)
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print select_outputs_greedy(unspent, target)
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target = long(argv[1]) if len(argv) > 1 else 55000000
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print("For transaction amount %d Satoshis (%f bitcoin) use: " %
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(target, target / 10.0 ** 8))
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print(select_outputs_greedy(unspent, target))
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if __name__ == "__main__":
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main()
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