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submission_str = create_submission_str(block_template) | |
# Define parameters for the RPC. | |
parameters = { | |
"host": "127.0.0.1", | |
"port": "8332", | |
"rpcuser": "Your Username", | |
"rpcpass": "Your Password", | |
"rpcurl": "http://127.0.0.1:8332" | |
} |
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def create_submission_str(block: Dict) -> str: | |
submission = ( | |
calc_block_header(block).hex() | |
+ get_le_var_hex(len(block['transactions'])) | |
) | |
for tx in block['transactions']: | |
submission += tx['data'] | |
return submission |
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block_template['merkleroot'] = calc_merkle_root( | |
[transaction['hash'] for transaction in block_template['transactions']] | |
) | |
block_template['nonce'] = 0 | |
block_header = calc_block_header(block_template) | |
block_hash = sha256_double_hash(block_header) | |
block_hash < target_hash |
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def calc_block_header(block: Dict) -> bytes: | |
return ( | |
struct.pack("<L", block["version"]) | |
+ bytes.fromhex(block["previousblockhash"])[::-1] | |
+ bytes.fromhex(block["merkleroot"])[::-1] | |
+ struct.pack("<L", block["curtime"]) | |
+ bytes.fromhex(block["bits"])[::-1] | |
+ struct.pack("<L", block["nonce"]) | |
) |
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def calc_merkle_root(transactions: List[str]) -> str: | |
# Convert transactions into big-endian bytes. | |
be_hashes = [ | |
bytes.fromhex(transaction)[::-1] | |
for transaction in transactions | |
] | |
# We combine the hashes pairwise until there is only 1 left. | |
while len(be_hashes) > 1: |
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from essential_generators import DocumentGenerator | |
import hashlib | |
def sha256_double_hash(target: str) -> str: | |
return hashlib.sha256( | |
hashlib.sha256(target).digest() | |
).digest()[::-1] |
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def get_le_hex(value: int, width: int) -> str: | |
return value.to_bytes(width, byteorder='little').hex() | |
def get_le_var_hex(value: int) -> str: | |
if value < 0xfd: | |
return get_le_hex(value, 1) | |
if value <= 0xffff: | |
return "fd" + get_le_hex(value, 2) | |
if value <= 0xffffffff: |
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def calc_target(bits: str) -> bytes: | |
""" | |
Decompress the target from a compact format. | |
""" | |
bits = bytes.fromhex(bits) | |
# Extract the parts. | |
byte_length = bits[0] - 3 | |
significand = bits[1:] |
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import base64 | |
import json | |
import random | |
import urllib.request | |
import urllib.error | |
import urllib.parse | |
# Define parameters for the RPC. | |
parameters = { | |
"host": "127.0.0.1", |
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git clone git@github.com:bitcoin/bitcoin.git | |
cd bitcoin/share/rpcauth | |
rpcauth.py [Your Username] [Your Password] |
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