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#!/usr/bin/env python3

# Copyright (C) 2013-2014 The python-bitcoinlib developers

#

# This file is part of python-bitcoinlib.

#

# It is subject to the license terms in the LICENSE file found in the top-level

# directory of this distribution.

#

# No part of python-bitcoinlib, including this file, may be copied, modified,

# propagated, or distributed except according to the terms contained in the

# LICENSE file.

"""Make a boostrap.dat file by getting the blocks from the RPC interface."""

import bitcoin

import bitcoin.rpc

import struct

import sys

import time

try:

if len(sys.argv) not in (2, 3):

raise Exception

n = int(sys.argv[1])

if len(sys.argv) == 3:

bitcoin.SelectParams(sys.argv[2])

except Exception as ex:

print('Usage: %s <block-height> [network=(mainnet|testnet|regtest)] > bootstrap.dat' % sys.argv[0], file=sys.stderr)

sys.exit(1)

proxy = bitcoin.rpc.Proxy()

total_bytes = 0

start_time = time.time()

fd = sys.stdout.buffer

for i in range(n + 1):

block = proxy.getblock(proxy.getblockhash(i))

block_bytes = block.serialize()

total_bytes += len(block_bytes)

print('%.2f KB/s, height %d, %d bytes' %

((total_bytes / 1000) / (time.time() - start_time),

i, len(block_bytes)),

file=sys.stderr)

fd.write(bitcoin.params.MESSAGE_START)

fd.write(struct.pack('<i', len(block_bytes)))

fd.write(block_bytes)