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version.py
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version.py
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import hashlib
import time
# payload
version = (int(70015)).to_bytes(4, byteorder="little", signed=True)
services = (int(0)).to_bytes(8, byteorder="little", signed=False)
timestamp = (int(time.time())).to_bytes(8, byteorder="little", signed=True)
addr_recv_services = (int(0)).to_bytes(8, byteorder="little", signed=False)
addr_recv_ip = bytes.fromhex("127.0.0.1".encode("utf-8").hex() + ("00")*7)
addr_recv_port = (int(8333)).to_bytes(2, byteorder="big", signed=False)
addr_send_services = (int(0)).to_bytes(8, byteorder="little", signed=False)
addr_send_ip = bytes.fromhex("127.0.0.1".encode("utf-8").hex() + ("00")*7)
addr_send_port = (int(8333)).to_bytes(2, byteorder="big", signed=False)
nonce = (int(0)).to_bytes(8, byteorder="little", signed=False)
user_agent_bytes = (int(0)).to_bytes(1, byteorder="little", signed=False)
start_height = (int(0)).to_bytes(4, byteorder="little", signed=False)
relay = b'0x00'
payload = (
version
+ services
+ timestamp
+ addr_recv_services
+ addr_recv_ip
+ addr_recv_port
+ addr_send_services
+ addr_send_ip
+ addr_send_port
+ nonce
+ user_agent_bytes
+ start_height
+ relay
)
# header
magic_number = bytes.fromhex("f9beb4d9")
command_name = bytes.fromhex("version".encode("utf-8").hex() + ("00")*5)
payload_size = (int(len(payload))).to_bytes(4, byteorder="little", signed=False)
checksum = hashlib.sha256(hashlib.sha256(payload).digest()).digest()[:4]
final_msg = (
magic_number
+ command_name
+ payload_size
+ checksum
+ payload
)
print(final_msg.hex())