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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
- verifychain
Tests correspond to code in rpc/blockchain.cpp.
"""
from decimal import Decimal
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import (
assert_equal,
assert_raises_jsonrpc,
assert_is_hex_string,
assert_is_hash_string,
start_nodes,
connect_nodes_bi,
)
class BlockchainTest(BitcoinTestFramework):
def __init__(self):
super().__init__()
self.setup_clean_chain = False
self.num_nodes = 2
def setup_network(self, split=False):
self.nodes = start_nodes(self.num_nodes, self.options.tmpdir)
connect_nodes_bi(self.nodes, 0, 1)
self.is_network_split = False
self.sync_all()
def run_test(self):
self._test_gettxoutsetinfo()
self._test_getblockheader()
self._test_getdifficulty()
self.nodes[0].verifychain(4, 0)
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['bytes_serialized'], 13924),
assert_equal(len(res['bestblock']), 64)
assert_equal(len(res['hash_serialized']), 64)
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
if __name__ == '__main__':
BlockchainTest().main()
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