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#!/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 scrypt_auxpow as auxpow
class GetAuxBlockTest (BitcoinTestFramework):
def 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'], 98)
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.computeAuxpowWithChainId (auxblock['hash'], target, "98", False)
res = self.nodes[0].getauxblock (auxblock['hash'], apow)
assert not res
# Compute and submit valid auxpow.
apow = auxpow.computeAuxpowWithChainId (auxblock['hash'], target, "98", 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 ("500000")
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 ("01%02x01" % auxblock['height'], coinbase[0 : 6]) # DIS: We mine less blocks in these tests
if __name__ == '__main__':
GetAuxBlockTest ().main ()
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