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blockchain.py
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blockchain.py
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#!/usr/bin/env python3
# Copyright (c) 2014-2016 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
"""Test RPCs related to blockchainstate.
Test the following RPCs:
- gettxoutsetinfo
- getdifficulty
- getbestblockhash
- getblockhash
- getblockheader
- getchaintxstats
- getnetworkhashps
- verifychain
Tests correspond to code in rpc/blockchain.cpp.
"""
from decimal import Decimal
import http.client
import subprocess
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import (
assert_equal,
assert_raises,
assert_raises_jsonrpc,
assert_is_hex_string,
assert_is_hash_string,
)
class BlockchainTest(BitcoinTestFramework):
def set_test_params(self):
self.num_nodes = 1
self.extra_args = [['-stopatheight=207']]
def run_test(self):
self._test_getchaintxstats()
self._test_gettxoutsetinfo()
self._test_getblockheader()
self._test_getdifficulty()
self._test_getnetworkhashps()
self._test_stopatheight()
assert self.nodes[0].verifychain(4, 0)
def _test_getchaintxstats(self):
chaintxstats = self.nodes[0].getchaintxstats(1)
# 200 txs plus genesis tx
assert_equal(chaintxstats['txcount'], 201)
# tx rate should be 1 per 10 minutes, or 1/600
# we have to round because of binary math
assert_equal(round(chaintxstats['txrate'] * 600, 10), Decimal(1))
def _test_gettxoutsetinfo(self):
node = self.nodes[0]
res = node.gettxoutsetinfo()
assert_equal(res['total_amount'], Decimal('8725.00000000'))
assert_equal(res['transactions'], 200)
assert_equal(res['height'], 200)
assert_equal(res['txouts'], 200)
assert_equal(res['bogosize'], 17000),
assert_equal(res['bestblock'], node.getblockhash(200))
size = res['disk_size']
assert size > 6400
assert size < 64000
assert_equal(len(res['bestblock']), 64)
assert_equal(len(res['hash_serialized_2']), 64)
self.log.info("Test that gettxoutsetinfo() works for blockchain with just the genesis block")
b1hash = node.getblockhash(1)
node.invalidateblock(b1hash)
res2 = node.gettxoutsetinfo()
assert_equal(res2['transactions'], 0)
assert_equal(res2['total_amount'], Decimal('0'))
assert_equal(res2['height'], 0)
assert_equal(res2['txouts'], 0)
assert_equal(res2['bogosize'], 0),
assert_equal(res2['bestblock'], node.getblockhash(0))
assert_equal(len(res2['hash_serialized_2']), 64)
self.log.info("Test that gettxoutsetinfo() returns the same result after invalidate/reconsider block")
node.reconsiderblock(b1hash)
res3 = node.gettxoutsetinfo()
assert_equal(res['total_amount'], res3['total_amount'])
assert_equal(res['transactions'], res3['transactions'])
assert_equal(res['height'], res3['height'])
assert_equal(res['txouts'], res3['txouts'])
assert_equal(res['bogosize'], res3['bogosize'])
assert_equal(res['bestblock'], res3['bestblock'])
assert_equal(res['hash_serialized_2'], res3['hash_serialized_2'])
def _test_getblockheader(self):
node = self.nodes[0]
assert_raises_jsonrpc(-5, "Block not found",
node.getblockheader, "nonsense")
besthash = node.getbestblockhash()
secondbesthash = node.getblockhash(199)
header = node.getblockheader(besthash)
assert_equal(header['hash'], besthash)
assert_equal(header['height'], 200)
assert_equal(header['confirmations'], 1)
assert_equal(header['previousblockhash'], secondbesthash)
assert_is_hex_string(header['chainwork'])
assert_is_hash_string(header['hash'])
assert_is_hash_string(header['previousblockhash'])
assert_is_hash_string(header['merkleroot'])
assert_is_hash_string(header['bits'], length=None)
assert isinstance(header['time'], int)
assert isinstance(header['mediantime'], int)
assert isinstance(header['nonce'], int)
assert isinstance(header['version'], int)
assert isinstance(int(header['versionHex'], 16), int)
assert isinstance(header['difficulty'], Decimal)
def _test_getdifficulty(self):
difficulty = self.nodes[0].getdifficulty()
# 1 hash in 2 should be valid, so difficulty should be 1/2**31
# binary => decimal => binary math is why we do this check
assert abs(difficulty * 2**31 - 1) < 0.0001
def _test_getnetworkhashps(self):
hashes_per_second = self.nodes[0].getnetworkhashps()
# This should be 2 hashes every 10 minutes or 1/300
assert abs(hashes_per_second * 300 - 1) < 0.0001
def _test_stopatheight(self):
assert_equal(self.nodes[0].getblockcount(), 200)
self.nodes[0].generate(6)
assert_equal(self.nodes[0].getblockcount(), 206)
self.log.debug('Node should not stop at this height')
assert_raises(subprocess.TimeoutExpired, lambda: self.nodes[0].process.wait(timeout=3))
try:
self.nodes[0].generate(1)
except (ConnectionError, http.client.BadStatusLine):
pass # The node already shut down before response
self.log.debug('Node should stop at this height...')
self.nodes[0].wait_until_stopped()
self.start_node(0)
assert_equal(self.nodes[0].getblockcount(), 207)
if __name__ == '__main__':
BlockchainTest().main()