#!/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 - getchaintxstats - getnetworkhashps - verifychain Tests correspond to code in rpc/blockchain.cpp. """ from decimal import Decimal import http.client import subprocess from test_framework.test_framework import BitcoinTestFramework from test_framework.util import ( assert_equal, assert_raises, assert_raises_rpc_error, assert_is_hex_string, assert_is_hash_string, ) class BlockchainTest(BitcoinTestFramework): def set_test_params(self): self.num_nodes = 1 self.extra_args = [['-stopatheight=207', '-prune=1']] def run_test(self): self._test_getblockchaininfo() self._test_getchaintxstats() self._test_gettxoutsetinfo() self._test_getblockheader() self._test_getdifficulty() self._test_getnetworkhashps() self._test_stopatheight() assert self.nodes[0].verifychain(4, 0) def _test_getblockchaininfo(self): self.log.info("Test getblockchaininfo") keys = [ 'bestblockhash', 'bip9_softforks', 'blocks', 'chain', 'chainwork', 'difficulty', 'headers', 'mediantime', 'pruned', 'softforks', 'verificationprogress', 'warnings', ] res = self.nodes[0].getblockchaininfo() # result should have pruneheight and default keys if pruning is enabled assert_equal(sorted(res.keys()), sorted(['pruneheight'] + keys)) # pruneheight should be greater or equal to 0 assert res['pruneheight'] >= 0 self.restart_node(0, ['-stopatheight=207']) res = self.nodes[0].getblockchaininfo() # should have exact keys assert_equal(sorted(res.keys()), keys) def _test_getchaintxstats(self): chaintxstats = self.nodes[0].getchaintxstats(1) # 200 txs plus genesis tx assert_equal(chaintxstats['txcount'], 201) # tx rate should be 1 per ~2.6 minutes (156 seconds), or 1/156 # we have to round because of binary math assert_equal(round(chaintxstats['txrate'] * 156, 10), Decimal(1)) b1 = self.nodes[0].getblock(self.nodes[0].getblockhash(1)) b200 = self.nodes[0].getblock(self.nodes[0].getblockhash(200)) time_diff = b200['mediantime'] - b1['mediantime'] chaintxstats = self.nodes[0].getchaintxstats() assert_equal(chaintxstats['time'], b200['time']) assert_equal(chaintxstats['txcount'], 201) assert_equal(chaintxstats['window_block_count'], 199) assert_equal(chaintxstats['window_tx_count'], 199) assert_equal(chaintxstats['window_interval'], time_diff) assert_equal(round(chaintxstats['txrate'] * time_diff, 10), Decimal(199)) chaintxstats = self.nodes[0].getchaintxstats(blockhash=b1['hash']) assert_equal(chaintxstats['time'], b1['time']) assert_equal(chaintxstats['txcount'], 2) assert_equal(chaintxstats['window_block_count'], 0) assert('window_tx_count' not in chaintxstats) assert('window_interval' not in chaintxstats) assert('txrate' not in chaintxstats) assert_raises_jsonrpc(-8, "Invalid block count: should be between 0 and the block's height - 1", self.nodes[0].getchaintxstats, 201) def _test_gettxoutsetinfo(self): node = self.nodes[0] res = node.gettxoutsetinfo() assert_equal(res['total_amount'], Decimal('98214.28571450')) assert_equal(res['transactions'], 200) assert_equal(res['height'], 200) assert_equal(res['txouts'], 200) assert_equal(res['bogosize'], 17000), size = res['disk_size'] assert size > 6400 assert size < 64000 assert_equal(len(res['bestblock']), 64) assert_equal(len(res['hash_serialized_2']), 64) self.log.info("Test that gettxoutsetinfo() works for blockchain with just the genesis block") b1hash = node.getblockhash(1) node.invalidateblock(b1hash) res2 = node.gettxoutsetinfo() assert_equal(res2['transactions'], 0) assert_equal(res2['total_amount'], Decimal('0')) assert_equal(res2['height'], 0) assert_equal(res2['txouts'], 0) assert_equal(res2['bogosize'], 0), assert_equal(res2['bestblock'], node.getblockhash(0)) assert_equal(len(res2['hash_serialized_2']), 64) self.log.info("Test that gettxoutsetinfo() returns the same result after invalidate/reconsider block") node.reconsiderblock(b1hash) res3 = node.gettxoutsetinfo() assert_equal(res['total_amount'], res3['total_amount']) assert_equal(res['transactions'], res3['transactions']) assert_equal(res['height'], res3['height']) assert_equal(res['txouts'], res3['txouts']) assert_equal(res['bogosize'], res3['bogosize']) assert_equal(res['bestblock'], res3['bestblock']) assert_equal(res['hash_serialized_2'], res3['hash_serialized_2']) def _test_getblockheader(self): node = self.nodes[0] assert_raises_rpc_error(-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 def _test_getnetworkhashps(self): hashes_per_second = self.nodes[0].getnetworkhashps() # This should be 2 hashes every 2.6 minutes (156 seconds) or 1/78 assert abs(hashes_per_second * 78 - 1) < 0.0001 def _test_stopatheight(self): assert_equal(self.nodes[0].getblockcount(), 200) self.nodes[0].generate(6) assert_equal(self.nodes[0].getblockcount(), 206) self.log.debug('Node should not stop at this height') assert_raises(subprocess.TimeoutExpired, lambda: self.nodes[0].process.wait(timeout=3)) try: self.nodes[0].generate(1) except (ConnectionError, http.client.BadStatusLine): pass # The node already shut down before response self.log.debug('Node should stop at this height...') self.nodes[0].wait_until_stopped() self.start_node(0) assert_equal(self.nodes[0].getblockcount(), 207) if __name__ == '__main__': BlockchainTest().main()