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']]
  37
  38     def run_test(self):
  39         self._test_getchaintxstats()
  40         self._test_gettxoutsetinfo()
  41         self._test_getblockheader()
  42         self._test_getdifficulty()
  43         self._test_getnetworkhashps()
  44         self._test_stopatheight()
  45         assert self.nodes[0].verifychain(4, 0)
  46
  47     def _test_getchaintxstats(self):
  48         chaintxstats = self.nodes[0].getchaintxstats(1)
  49         # 200 txs plus genesis tx
  50         assert_equal(chaintxstats['txcount'], 201)
  51         # tx rate should be 1 per 10 minutes, or 1/600
  52         # we have to round because of binary math
  53         assert_equal(round(chaintxstats['txrate'] * 600, 10), Decimal(1))
  54
  55     def _test_gettxoutsetinfo(self):
  56         node = self.nodes[0]
  57         res = node.gettxoutsetinfo()
  58
  59         assert_equal(res['total_amount'], Decimal('8725.00000000'))
  60         assert_equal(res['transactions'], 200)
  61         assert_equal(res['height'], 200)
  62         assert_equal(res['txouts'], 200)
  63         assert_equal(res['bogosize'], 17000),
  64         assert_equal(res['bestblock'], node.getblockhash(200))
  65         size = res['disk_size']
  66         assert size > 6400
  67         assert size < 64000
  68         assert_equal(len(res['bestblock']), 64)
  69         assert_equal(len(res['hash_serialized_2']), 64)
  70
  71         self.log.info("Test that gettxoutsetinfo() works for blockchain with just the genesis block")
  72         b1hash = node.getblockhash(1)
  73         node.invalidateblock(b1hash)
  74
  75         res2 = node.gettxoutsetinfo()
  76         assert_equal(res2['transactions'], 0)
  77         assert_equal(res2['total_amount'], Decimal('0'))
  78         assert_equal(res2['height'], 0)
  79         assert_equal(res2['txouts'], 0)
  80         assert_equal(res2['bogosize'], 0),
  81         assert_equal(res2['bestblock'], node.getblockhash(0))
  82         assert_equal(len(res2['hash_serialized_2']), 64)
  83
  84         self.log.info("Test that gettxoutsetinfo() returns the same result after invalidate/reconsider block")
  85         node.reconsiderblock(b1hash)
  86
  87         res3 = node.gettxoutsetinfo()
  88         assert_equal(res['total_amount'], res3['total_amount'])
  89         assert_equal(res['transactions'], res3['transactions'])
  90         assert_equal(res['height'], res3['height'])
  91         assert_equal(res['txouts'], res3['txouts'])
  92         assert_equal(res['bogosize'], res3['bogosize'])
  93         assert_equal(res['bestblock'], res3['bestblock'])
  94         assert_equal(res['hash_serialized_2'], res3['hash_serialized_2'])
  95
  96     def _test_getblockheader(self):
  97         node = self.nodes[0]
  98
  99         assert_raises_jsonrpc(-5, "Block not found",
 100                               node.getblockheader, "nonsense")
 101
 102         besthash = node.getbestblockhash()
 103         secondbesthash = node.getblockhash(199)
 104         header = node.getblockheader(besthash)
 105
 106         assert_equal(header['hash'], besthash)
 107         assert_equal(header['height'], 200)
 108         assert_equal(header['confirmations'], 1)
 109         assert_equal(header['previousblockhash'], secondbesthash)
 110         assert_is_hex_string(header['chainwork'])
 111         assert_is_hash_string(header['hash'])
 112         assert_is_hash_string(header['previousblockhash'])
 113         assert_is_hash_string(header['merkleroot'])
 114         assert_is_hash_string(header['bits'], length=None)
 115         assert isinstance(header['time'], int)
 116         assert isinstance(header['mediantime'], int)
 117         assert isinstance(header['nonce'], int)
 118         assert isinstance(header['version'], int)
 119         assert isinstance(int(header['versionHex'], 16), int)
 120         assert isinstance(header['difficulty'], Decimal)
 121
 122     def _test_getdifficulty(self):
 123         difficulty = self.nodes[0].getdifficulty()
 124         # 1 hash in 2 should be valid, so difficulty should be 1/2**31
 125         # binary => decimal => binary math is why we do this check
 126         assert abs(difficulty * 2**31 - 1) < 0.0001
 127
 128     def _test_getnetworkhashps(self):
 129         hashes_per_second = self.nodes[0].getnetworkhashps()
 130         # This should be 2 hashes every 10 minutes or 1/300
 131         assert abs(hashes_per_second * 300 - 1) < 0.0001
 132
 133     def _test_stopatheight(self):
 134         assert_equal(self.nodes[0].getblockcount(), 200)
 135         self.nodes[0].generate(6)
 136         assert_equal(self.nodes[0].getblockcount(), 206)
 137         self.log.debug('Node should not stop at this height')
 138         assert_raises(subprocess.TimeoutExpired, lambda: self.nodes[0].process.wait(timeout=3))
 139         try:
 140             self.nodes[0].generate(1)
 141         except (ConnectionError, http.client.BadStatusLine):
 142             pass  # The node already shut down before response
 143         self.log.debug('Node should stop at this height...')
 144         self.nodes[0].wait_until_stopped()
 145         self.start_node(0)
 146         assert_equal(self.nodes[0].getblockcount(), 207)
 147
 148
 149 if __name__ == '__main__':
 150     BlockchainTest().main()