test/functional/blockchain.py

   1 #!/usr/bin/env python3
   2 # Copyright (c) 2014-2016 The Bitcoin Core developers
   3 # Distributed under the MIT software license, see the accompanying
   4 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
   5 """Test RPCs related to blockchainstate.
   6
   7 Test the following RPCs:
   8     - gettxoutsetinfo
   9     - getdifficulty
  10     - getbestblockhash
  11     - getblockhash
  12     - getblockheader
  13     - getchaintxstats
  14     - getnetworkhashps
  15     - verifychain
  16
  17 Tests correspond to code in rpc/blockchain.cpp.
  18 """
  19
  20 from decimal import Decimal
  21 import http.client
  22 import subprocess
  23
  24 from test_framework.test_framework import (BitcoinTestFramework, BITCOIND_PROC_WAIT_TIMEOUT)
  25 from test_framework.util import (
  26     assert_equal,
  27     assert_raises,
  28     assert_raises_jsonrpc,
  29     assert_is_hex_string,
  30     assert_is_hash_string,
  31 )
  32
  33
  34 class BlockchainTest(BitcoinTestFramework):
  35
  36     def __init__(self):
  37         super().__init__()
  38         self.setup_clean_chain = False
  39         self.num_nodes = 1
  40         self.extra_args = [['-stopatheight=207']]
  41
  42     def run_test(self):
  43         self._test_getchaintxstats()
  44         self._test_gettxoutsetinfo()
  45         self._test_getblockheader()
  46         self._test_getdifficulty()
  47         self._test_getnetworkhashps()
  48         self._test_stopatheight()
  49         assert self.nodes[0].verifychain(4, 0)
  50
  51     def _test_getchaintxstats(self):
  52         chaintxstats = self.nodes[0].getchaintxstats(1)
  53         # 200 txs plus genesis tx
  54         assert_equal(chaintxstats['txcount'], 201)
  55         # tx rate should be 1 per 10 minutes, or 1/600
  56         # we have to round because of binary math
  57         assert_equal(round(chaintxstats['txrate'] * 600, 10), Decimal(1))
  58
  59     def _test_gettxoutsetinfo(self):
  60         node = self.nodes[0]
  61         res = node.gettxoutsetinfo()
  62
  63         assert_equal(res['total_amount'], Decimal('8725.00000000'))
  64         assert_equal(res['transactions'], 200)
  65         assert_equal(res['height'], 200)
  66         assert_equal(res['txouts'], 200)
  67         assert_equal(res['bogosize'], 17000),
  68         assert_equal(res['bestblock'], node.getblockhash(200))
  69         size = res['disk_size']
  70         assert size > 6400
  71         assert size < 64000
  72         assert_equal(len(res['bestblock']), 64)
  73         assert_equal(len(res['hash_serialized_2']), 64)
  74
  75         self.log.info("Test that gettxoutsetinfo() works for blockchain with just the genesis block")
  76         b1hash = node.getblockhash(1)
  77         node.invalidateblock(b1hash)
  78
  79         res2 = node.gettxoutsetinfo()
  80         assert_equal(res2['transactions'], 0)
  81         assert_equal(res2['total_amount'], Decimal('0'))
  82         assert_equal(res2['height'], 0)
  83         assert_equal(res2['txouts'], 0)
  84         assert_equal(res2['bogosize'], 0),
  85         assert_equal(res2['bestblock'], node.getblockhash(0))
  86         assert_equal(len(res2['hash_serialized_2']), 64)
  87
  88         self.log.info("Test that gettxoutsetinfo() returns the same result after invalidate/reconsider block")
  89         node.reconsiderblock(b1hash)
  90
  91         res3 = node.gettxoutsetinfo()
  92         assert_equal(res['total_amount'], res3['total_amount'])
  93         assert_equal(res['transactions'], res3['transactions'])
  94         assert_equal(res['height'], res3['height'])
  95         assert_equal(res['txouts'], res3['txouts'])
  96         assert_equal(res['bogosize'], res3['bogosize'])
  97         assert_equal(res['bestblock'], res3['bestblock'])
  98         assert_equal(res['hash_serialized_2'], res3['hash_serialized_2'])
  99
 100     def _test_getblockheader(self):
 101         node = self.nodes[0]
 102
 103         assert_raises_jsonrpc(-5, "Block not found",
 104                               node.getblockheader, "nonsense")
 105
 106         besthash = node.getbestblockhash()
 107         secondbesthash = node.getblockhash(199)
 108         header = node.getblockheader(besthash)
 109
 110         assert_equal(header['hash'], besthash)
 111         assert_equal(header['height'], 200)
 112         assert_equal(header['confirmations'], 1)
 113         assert_equal(header['previousblockhash'], secondbesthash)
 114         assert_is_hex_string(header['chainwork'])
 115         assert_is_hash_string(header['hash'])
 116         assert_is_hash_string(header['previousblockhash'])
 117         assert_is_hash_string(header['merkleroot'])
 118         assert_is_hash_string(header['bits'], length=None)
 119         assert isinstance(header['time'], int)
 120         assert isinstance(header['mediantime'], int)
 121         assert isinstance(header['nonce'], int)
 122         assert isinstance(header['version'], int)
 123         assert isinstance(int(header['versionHex'], 16), int)
 124         assert isinstance(header['difficulty'], Decimal)
 125
 126     def _test_getdifficulty(self):
 127         difficulty = self.nodes[0].getdifficulty()
 128         # 1 hash in 2 should be valid, so difficulty should be 1/2**31
 129         # binary => decimal => binary math is why we do this check
 130         assert abs(difficulty * 2**31 - 1) < 0.0001
 131
 132     def _test_getnetworkhashps(self):
 133         hashes_per_second = self.nodes[0].getnetworkhashps()
 134         # This should be 2 hashes every 10 minutes or 1/300
 135         assert abs(hashes_per_second * 300 - 1) < 0.0001
 136
 137     def _test_stopatheight(self):
 138         assert_equal(self.nodes[0].getblockcount(), 200)
 139         self.nodes[0].generate(6)
 140         assert_equal(self.nodes[0].getblockcount(), 206)
 141         self.log.debug('Node should not stop at this height')
 142         assert_raises(subprocess.TimeoutExpired, lambda: self.bitcoind_processes[0].wait(timeout=3))
 143         try:
 144             self.nodes[0].generate(1)
 145         except (ConnectionError, http.client.BadStatusLine):
 146             pass  # The node already shut down before response
 147         self.log.debug('Node should stop at this height...')
 148         self.bitcoind_processes[0].wait(timeout=BITCOIND_PROC_WAIT_TIMEOUT)
 149         self.nodes[0] = self.start_node(0, self.options.tmpdir)
 150         assert_equal(self.nodes[0].getblockcount(), 207)
 151
 152
 153 if __name__ == '__main__':
 154     BlockchainTest().main()