#!/usr/bin/env python # Copyright (c) 2014-2015 Daniel Kraft # Distributed under the MIT software license, see the accompanying # file COPYING or http://www.opensource.org/licenses/mit-license.php. # Test the "getauxblock" merge-mining RPC interface. from test_framework.test_framework import BitcoinTestFramework from test_framework.util import * from test_framework import auxpow class GetAuxBlockTest (BitcoinTestFramework): def run_test (self): BitcoinTestFramework.run_test (self) # Generate a block so that we are not "downloading blocks". self.nodes[0].generate (1) # Compare basic data of getauxblock to getblocktemplate. auxblock = self.nodes[0].getauxblock () blocktemplate = self.nodes[0].getblocktemplate () assert_equal (auxblock['coinbasevalue'], blocktemplate['coinbasevalue']) assert_equal (auxblock['bits'], blocktemplate['bits']) assert_equal (auxblock['height'], blocktemplate['height']) assert_equal (auxblock['previousblockhash'], blocktemplate['previousblockhash']) # Compare target and take byte order into account. target = auxblock['_target'] reversedTarget = auxpow.reverseHex (target) assert_equal (reversedTarget, blocktemplate['target']) # Verify data that can be found in another way. assert_equal (auxblock['chainid'], 1) assert_equal (auxblock['height'], self.nodes[0].getblockcount () + 1) assert_equal (auxblock['previousblockhash'], self.nodes[0].getblockhash (auxblock['height'] - 1)) # Calling again should give the same block. auxblock2 = self.nodes[0].getauxblock () assert_equal (auxblock2, auxblock) # If we receive a new block, the old hash will be replaced. self.sync_all () self.nodes[1].generate (1) self.sync_all () auxblock2 = self.nodes[0].getauxblock () assert auxblock['hash'] != auxblock2['hash'] try: self.nodes[0].getauxblock (auxblock['hash'], "x") raise AssertionError ("invalid block hash accepted") except JSONRPCException as exc: assert_equal (exc.error['code'], -8) # Invalid format for auxpow. try: self.nodes[0].getauxblock (auxblock2['hash'], "x") raise AssertionError ("malformed auxpow accepted") except JSONRPCException as exc: assert_equal (exc.error['code'], -1) # Invalidate the block again, send a transaction and query for the # auxblock to solve that contains the transaction. self.nodes[0].generate (1) addr = self.nodes[1].getnewaddress () txid = self.nodes[0].sendtoaddress (addr, 1) self.sync_all () assert_equal (self.nodes[1].getrawmempool (), [txid]) auxblock = self.nodes[0].getauxblock () blocktemplate = self.nodes[0].getblocktemplate () target = blocktemplate['target'] # Compute invalid auxpow. apow = auxpow.computeAuxpow (auxblock['hash'], target, False) res = self.nodes[0].getauxblock (auxblock['hash'], apow) assert not res # Compute and submit valid auxpow. apow = auxpow.computeAuxpow (auxblock['hash'], target, True) res = self.nodes[0].getauxblock (auxblock['hash'], apow) assert res # Make sure that the block is indeed accepted. self.sync_all () assert_equal (self.nodes[1].getrawmempool (), []) height = self.nodes[1].getblockcount () assert_equal (height, auxblock['height']) assert_equal (self.nodes[1].getblockhash (height), auxblock['hash']) # Call getblock and verify the auxpow field. data = self.nodes[1].getblock (auxblock['hash']) assert 'auxpow' in data auxJson = data['auxpow'] assert_equal (auxJson['index'], 0) assert_equal (auxJson['parentblock'], apow[-160:]) # Check that previous blocks don't have 'auxpow' in their getblock JSON. oldHash = self.nodes[1].getblockhash (100) data = self.nodes[1].getblock (oldHash) assert 'auxpow' not in data # Check that it paid correctly to the first node. t = self.nodes[0].listtransactions ("", 1) assert_equal (len (t), 1) t = t[0] assert_equal (t['category'], "immature") assert_equal (t['blockhash'], auxblock['hash']) assert t['generated'] assert t['amount'] >= Decimal ("25") assert_equal (t['confirmations'], 1) # Verify the coinbase script. Ensure that it includes the block height # to make the coinbase tx unique. The expected block height is around # 200, so that the serialisation of the CScriptNum ends in an extra 00. # The vector has length 2, which makes up for 02XX00 as the serialised # height. Check this. blk = self.nodes[1].getblock (auxblock['hash']) tx = self.nodes[1].getrawtransaction (blk['tx'][0], 1) coinbase = tx['vin'][0]['coinbase'] assert_equal ("02%02x00" % auxblock['height'], coinbase[0 : 6]) if __name__ == '__main__': GetAuxBlockTest ().main ()