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     - getnetworkhashps
  14     - verifychain
  15
  16 Tests correspond to code in rpc/blockchain.cpp.
  17 """
  18
  19 from decimal import Decimal
  20
  21 from test_framework.test_framework import BitcoinTestFramework
  22 from test_framework.util import (
  23     assert_equal,
  24     assert_raises_jsonrpc,
  25     assert_is_hex_string,
  26     assert_is_hash_string,
  27 )
  28
  29
  30 class BlockchainTest(BitcoinTestFramework):
  31
  32     def __init__(self):
  33         super().__init__()
  34         self.setup_clean_chain = False
  35         self.num_nodes = 1
  36
  37     def run_test(self):
  38         self._test_gettxoutsetinfo()
  39         self._test_getblockheader()
  40         self._test_getdifficulty()
  41         self._test_getnetworkhashps()
  42         self.nodes[0].verifychain(4, 0)
  43
  44     def _test_gettxoutsetinfo(self):
  45         node = self.nodes[0]
  46         res = node.gettxoutsetinfo()
  47
  48         assert_equal(res['total_amount'], Decimal('8725.00000000'))
  49         assert_equal(res['transactions'], 200)
  50         assert_equal(res['height'], 200)
  51         assert_equal(res['txouts'], 200)
  52         assert_equal(res['bestblock'], node.getblockhash(200))
  53         size = res['disk_size']
  54         assert size > 6400
  55         assert size < 64000
  56         assert_equal(len(res['bestblock']), 64)
  57         assert_equal(len(res['hash_serialized_2']), 64)
  58
  59         self.log.info("Test that gettxoutsetinfo() works for blockchain with just the genesis block")
  60         b1hash = node.getblockhash(1)
  61         node.invalidateblock(b1hash)
  62
  63         res2 = node.gettxoutsetinfo()
  64         assert_equal(res2['transactions'], 0)
  65         assert_equal(res2['total_amount'], Decimal('0'))
  66         assert_equal(res2['height'], 0)
  67         assert_equal(res2['txouts'], 0)
  68         assert_equal(res2['bestblock'], node.getblockhash(0))
  69         assert_equal(len(res2['hash_serialized_2']), 64)
  70
  71         self.log.info("Test that gettxoutsetinfo() returns the same result after invalidate/reconsider block")
  72         node.reconsiderblock(b1hash)
  73
  74         res3 = node.gettxoutsetinfo()
  75         assert_equal(res['total_amount'], res3['total_amount'])
  76         assert_equal(res['transactions'], res3['transactions'])
  77         assert_equal(res['height'], res3['height'])
  78         assert_equal(res['txouts'], res3['txouts'])
  79         assert_equal(res['bestblock'], res3['bestblock'])
  80         assert_equal(res['hash_serialized_2'], res3['hash_serialized_2'])
  81
  82     def _test_getblockheader(self):
  83         node = self.nodes[0]
  84
  85         assert_raises_jsonrpc(-5, "Block not found",
  86                               node.getblockheader, "nonsense")
  87
  88         besthash = node.getbestblockhash()
  89         secondbesthash = node.getblockhash(199)
  90         header = node.getblockheader(besthash)
  91
  92         assert_equal(header['hash'], besthash)
  93         assert_equal(header['height'], 200)
  94         assert_equal(header['confirmations'], 1)
  95         assert_equal(header['previousblockhash'], secondbesthash)
  96         assert_is_hex_string(header['chainwork'])
  97         assert_is_hash_string(header['hash'])
  98         assert_is_hash_string(header['previousblockhash'])
  99         assert_is_hash_string(header['merkleroot'])
 100         assert_is_hash_string(header['bits'], length=None)
 101         assert isinstance(header['time'], int)
 102         assert isinstance(header['mediantime'], int)
 103         assert isinstance(header['nonce'], int)
 104         assert isinstance(header['version'], int)
 105         assert isinstance(int(header['versionHex'], 16), int)
 106         assert isinstance(header['difficulty'], Decimal)
 107
 108     def _test_getdifficulty(self):
 109         difficulty = self.nodes[0].getdifficulty()
 110         # 1 hash in 2 should be valid, so difficulty should be 1/2**31
 111         # binary => decimal => binary math is why we do this check
 112         assert abs(difficulty * 2**31 - 1) < 0.0001
 113
 114     def _test_getnetworkhashps(self):
 115         hashes_per_second = self.nodes[0].getnetworkhashps()
 116         # This should be 2 hashes every 10 minutes or 1/300
 117         assert abs(hashes_per_second * 300 - 1) < 0.0001
 118
 119 if __name__ == '__main__':
 120     BlockchainTest().main()