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
  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 class BlockchainTest(BitcoinTestFramework):
  34     def set_test_params(self):
  35         self.num_nodes = 1
  36         self.extra_args = [['-stopatheight=207', '-prune=1']]
  37
  38     def run_test(self):
  39         self._test_getblockchaininfo()
  40         self._test_getchaintxstats()
  41         self._test_gettxoutsetinfo()
  42         self._test_getblockheader()
  43         self._test_getdifficulty()
  44         self._test_getnetworkhashps()
  45         self._test_stopatheight()
  46         assert self.nodes[0].verifychain(4, 0)
  47
  48     def _test_getblockchaininfo(self):
  49         self.log.info("Test getblockchaininfo")
  50
  51         keys = [
  52             'bestblockhash',
  53             'bip9_softforks',
  54             'blocks',
  55             'chain',
  56             'chainwork',
  57             'difficulty',
  58             'headers',
  59             'mediantime',
  60             'pruned',
  61             'softforks',
  62             'verificationprogress',
  63             'warnings',
  64         ]
  65         res = self.nodes[0].getblockchaininfo()
  66         # result should have pruneheight and default keys if pruning is enabled
  67         assert_equal(sorted(res.keys()), sorted(['pruneheight'] + keys))
  68         # pruneheight should be greater or equal to 0
  69         assert res['pruneheight'] >= 0
  70
  71         self.restart_node(0, ['-stopatheight=207'])
  72         res = self.nodes[0].getblockchaininfo()
  73         # should have exact keys
  74         assert_equal(sorted(res.keys()), keys)
  75
  76     def _test_getchaintxstats(self):
  77         chaintxstats = self.nodes[0].getchaintxstats(1)
  78         # 200 txs plus genesis tx
  79         assert_equal(chaintxstats['txcount'], 201)
  80         # tx rate should be 1 per 10 minutes, or 1/600
  81         # we have to round because of binary math
  82         assert_equal(round(chaintxstats['txrate'] * 600, 10), Decimal(1))
  83
  84         b1 = self.nodes[0].getblock(self.nodes[0].getblockhash(1))
  85         b200 = self.nodes[0].getblock(self.nodes[0].getblockhash(200))
  86         time_diff = b200['mediantime'] - b1['mediantime']
  87
  88         chaintxstats = self.nodes[0].getchaintxstats()
  89         assert_equal(chaintxstats['time'], b200['time'])
  90         assert_equal(chaintxstats['txcount'], 201)
  91         assert_equal(chaintxstats['window_block_count'], 199)
  92         assert_equal(chaintxstats['window_tx_count'], 199)
  93         assert_equal(chaintxstats['window_interval'], time_diff)
  94         assert_equal(round(chaintxstats['txrate'] * time_diff, 10), Decimal(199))
  95
  96         chaintxstats = self.nodes[0].getchaintxstats(blockhash=b1['hash'])
  97         assert_equal(chaintxstats['time'], b1['time'])
  98         assert_equal(chaintxstats['txcount'], 2)
  99         assert_equal(chaintxstats['window_block_count'], 0)
 100         assert('window_tx_count' not in chaintxstats)
 101         assert('window_interval' not in chaintxstats)
 102         assert('txrate' not in chaintxstats)
 103
 104         assert_raises_jsonrpc(-8, "Invalid block count: should be between 0 and the block's height - 1", self.nodes[0].getchaintxstats, 201)
 105
 106     def _test_gettxoutsetinfo(self):
 107         node = self.nodes[0]
 108         res = node.gettxoutsetinfo()
 109
 110         assert_equal(res['total_amount'], Decimal('8725.00000000'))
 111         assert_equal(res['transactions'], 200)
 112         assert_equal(res['height'], 200)
 113         assert_equal(res['txouts'], 200)
 114         assert_equal(res['bogosize'], 17000),
 115         assert_equal(res['bestblock'], node.getblockhash(200))
 116         size = res['disk_size']
 117         assert size > 6400
 118         assert size < 64000
 119         assert_equal(len(res['bestblock']), 64)
 120         assert_equal(len(res['hash_serialized_2']), 64)
 121
 122         self.log.info("Test that gettxoutsetinfo() works for blockchain with just the genesis block")
 123         b1hash = node.getblockhash(1)
 124         node.invalidateblock(b1hash)
 125
 126         res2 = node.gettxoutsetinfo()
 127         assert_equal(res2['transactions'], 0)
 128         assert_equal(res2['total_amount'], Decimal('0'))
 129         assert_equal(res2['height'], 0)
 130         assert_equal(res2['txouts'], 0)
 131         assert_equal(res2['bogosize'], 0),
 132         assert_equal(res2['bestblock'], node.getblockhash(0))
 133         assert_equal(len(res2['hash_serialized_2']), 64)
 134
 135         self.log.info("Test that gettxoutsetinfo() returns the same result after invalidate/reconsider block")
 136         node.reconsiderblock(b1hash)
 137
 138         res3 = node.gettxoutsetinfo()
 139         assert_equal(res['total_amount'], res3['total_amount'])
 140         assert_equal(res['transactions'], res3['transactions'])
 141         assert_equal(res['height'], res3['height'])
 142         assert_equal(res['txouts'], res3['txouts'])
 143         assert_equal(res['bogosize'], res3['bogosize'])
 144         assert_equal(res['bestblock'], res3['bestblock'])
 145         assert_equal(res['hash_serialized_2'], res3['hash_serialized_2'])
 146
 147     def _test_getblockheader(self):
 148         node = self.nodes[0]
 149
 150         assert_raises_jsonrpc(-5, "Block not found",
 151                               node.getblockheader, "nonsense")
 152
 153         besthash = node.getbestblockhash()
 154         secondbesthash = node.getblockhash(199)
 155         header = node.getblockheader(besthash)
 156
 157         assert_equal(header['hash'], besthash)
 158         assert_equal(header['height'], 200)
 159         assert_equal(header['confirmations'], 1)
 160         assert_equal(header['previousblockhash'], secondbesthash)
 161         assert_is_hex_string(header['chainwork'])
 162         assert_is_hash_string(header['hash'])
 163         assert_is_hash_string(header['previousblockhash'])
 164         assert_is_hash_string(header['merkleroot'])
 165         assert_is_hash_string(header['bits'], length=None)
 166         assert isinstance(header['time'], int)
 167         assert isinstance(header['mediantime'], int)
 168         assert isinstance(header['nonce'], int)
 169         assert isinstance(header['version'], int)
 170         assert isinstance(int(header['versionHex'], 16), int)
 171         assert isinstance(header['difficulty'], Decimal)
 172
 173     def _test_getdifficulty(self):
 174         difficulty = self.nodes[0].getdifficulty()
 175         # 1 hash in 2 should be valid, so difficulty should be 1/2**31
 176         # binary => decimal => binary math is why we do this check
 177         assert abs(difficulty * 2**31 - 1) < 0.0001
 178
 179     def _test_getnetworkhashps(self):
 180         hashes_per_second = self.nodes[0].getnetworkhashps()
 181         # This should be 2 hashes every 10 minutes or 1/300
 182         assert abs(hashes_per_second * 300 - 1) < 0.0001
 183
 184     def _test_stopatheight(self):
 185         assert_equal(self.nodes[0].getblockcount(), 200)
 186         self.nodes[0].generate(6)
 187         assert_equal(self.nodes[0].getblockcount(), 206)
 188         self.log.debug('Node should not stop at this height')
 189         assert_raises(subprocess.TimeoutExpired, lambda: self.nodes[0].process.wait(timeout=3))
 190         try:
 191             self.nodes[0].generate(1)
 192         except (ConnectionError, http.client.BadStatusLine):
 193             pass  # The node already shut down before response
 194         self.log.debug('Node should stop at this height...')
 195         self.nodes[0].wait_until_stopped()
 196         self.start_node(0)
 197         assert_equal(self.nodes[0].getblockcount(), 207)
 198
 199
 200 if __name__ == '__main__':
 201     BlockchainTest().main()