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[tests] don't build blocks manually in getblocktemplate test

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This commit is contained in:
John Newbery 2017-04-11 16:42:12 -04:00
parent f82c709fbe
commit 82dc59706e
1 changed files with 57 additions and 92 deletions
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149
test/functional/getblocktemplate_proposals.py
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@ -4,66 +4,21 @@
# file COPYING or http://www.opensource.org/licenses/mit-license.php. # file COPYING or http://www.opensource.org/licenses/mit-license.php.
"""Test block proposals with getblocktemplate.""" """Test block proposals with getblocktemplate."""
from binascii import a2b_hex, b2a_hex from binascii import b2a_hex
from hashlib import sha256 import copy
from struct import pack
from test_framework.blocktools import create_coinbase from test_framework.blocktools import create_coinbase
from test_framework.test_framework import BitcoinTestFramework from test_framework.test_framework import BitcoinTestFramework
from test_framework.mininode import CBlock
from test_framework.util import * from test_framework.util import *
def b2x(b): def b2x(b):
return b2a_hex(b).decode('ascii') return b2a_hex(b).decode('ascii')
# NOTE: This does not work for signed numbers (set the high bit) or zero (use b'\0') def assert_template(node, block, expect, rehash=True):
def encodeUNum(n): if rehash:
s = bytearray(b'\1') block.hashMerkleRoot = block.calc_merkle_root()
while n > 127: rsp = node.getblocktemplate({'data': b2x(block.serialize()), 'mode': 'proposal'})
s[0] += 1
s.append(n % 256)
n //= 256
s.append(n)
return bytes(s)
def varlenEncode(n):
if n < 0xfd:
return pack('<B', n)
if n <= 0xffff:
return b'\xfd' + pack('<H', n)
if n <= 0xffffffff:
return b'\xfe' + pack('<L', n)
return b'\xff' + pack('<Q', n)
def dblsha(b):
return sha256(sha256(b).digest()).digest()
def genmrklroot(leaflist):
cur = leaflist
while len(cur) > 1:
n = []
if len(cur) & 1:
cur.append(cur[-1])
for i in range(0, len(cur), 2):
n.append(dblsha(cur[i] + cur[i + 1]))
cur = n
return cur[0]
def template_to_bytearray(tmpl, txlist):
blkver = pack('<L', tmpl['version'])
mrklroot = genmrklroot(list(dblsha(a) for a in txlist))
timestamp = pack('<L', tmpl['curtime'])
nonce = b'\0\0\0\0'
blk = blkver + a2b_hex(tmpl['previousblockhash'])[::-1] + mrklroot + timestamp + a2b_hex(tmpl['bits'])[::-1] + nonce
blk += varlenEncode(len(txlist))
for tx in txlist:
blk += tx
return bytearray(blk)
def template_to_hex(tmpl, txlist):
return b2x(template_to_bytearray(tmpl, txlist))
def assert_template(node, tmpl, txlist, expect):
rsp = node.getblocktemplate({'data': template_to_hex(tmpl, txlist), 'mode': 'proposal'})
assert_equal(rsp, expect) assert_equal(rsp, expect)
class GetBlockTemplateProposalTest(BitcoinTestFramework): class GetBlockTemplateProposalTest(BitcoinTestFramework):
@ -78,74 +33,84 @@ class GetBlockTemplateProposalTest(BitcoinTestFramework):
# Mine a block to leave initial block download # Mine a block to leave initial block download
node.generate(1) node.generate(1)
tmpl = node.getblocktemplate() tmpl = node.getblocktemplate()
self.log.info("getblocktemplate: Test capability advertised")
assert 'proposal' in tmpl['capabilities']
assert 'coinbasetxn' not in tmpl assert 'coinbasetxn' not in tmpl
coinbase_tx = create_coinbase(height=int(tmpl["height"]) + 1) coinbase_tx = create_coinbase(height=int(tmpl["height"]) + 1)
# sequence numbers must not be max for nLockTime to have effect # sequence numbers must not be max for nLockTime to have effect
coinbase_tx.vin[0].nSequence = 2 ** 32 - 2 coinbase_tx.vin[0].nSequence = 2 ** 32 - 2
tmpl['coinbasetxn'] = {'data': coinbase_tx.serialize()} coinbase_tx.rehash()
txlist = [bytearray(coinbase_tx.serialize())]
self.log.info("getblocktemplate: Test capability advertised") block = CBlock()
assert 'proposal' in tmpl['capabilities'] block.nVersion = tmpl["version"]
block.hashPrevBlock = int(tmpl["previousblockhash"], 16)
block.nTime = tmpl["curtime"]
block.nBits = int(tmpl["bits"], 16)
block.nNonce = 0
block.vtx = [coinbase_tx]
self.log.info("getblocktemplate: Test bad input hash for coinbase transaction") self.log.info("getblocktemplate: Test bad input hash for coinbase transaction")
txlist[0][4 + 1] += 1 bad_block = copy.deepcopy(block)
assert_template(node, tmpl, txlist, 'bad-cb-missing') bad_block.vtx[0].vin[0].prevout.hash += 1
txlist[0][4 + 1] -= 1 bad_block.vtx[0].rehash()
assert_template(node, bad_block, 'bad-cb-missing')
self.log.info("getblocktemplate: Test truncated final transaction") self.log.info("getblocktemplate: Test truncated final transaction")
lastbyte = txlist[-1].pop() assert_raises_jsonrpc(-22, "Block decode failed", node.getblocktemplate, {'data': b2x(block.serialize()[:-1]), 'mode': 'proposal'})
assert_raises_jsonrpc(-22, "Block decode failed", assert_template, node, tmpl, txlist, 'n/a')
txlist[-1].append(lastbyte)
self.log.info("getblocktemplate: Test duplicate transaction") self.log.info("getblocktemplate: Test duplicate transaction")
txlist.append(txlist[0]) bad_block = copy.deepcopy(block)
assert_template(node, tmpl, txlist, 'bad-txns-duplicate') bad_block.vtx.append(bad_block.vtx[0])
txlist.pop() assert_template(node, bad_block, 'bad-txns-duplicate')
self.log.info("getblocktemplate: Test invalid transaction") self.log.info("getblocktemplate: Test invalid transaction")
txlist.append(bytearray(txlist[0])) bad_block = copy.deepcopy(block)
txlist[-1][4 + 1] = 0xff bad_tx = copy.deepcopy(bad_block.vtx[0])
assert_template(node, tmpl, txlist, 'bad-txns-inputs-missingorspent') bad_tx.vin[0].prevout.hash = 255
txlist.pop() bad_tx.rehash()
bad_block.vtx.append(bad_tx)
assert_template(node, bad_block, 'bad-txns-inputs-missingorspent')
self.log.info("getblocktemplate: Test nonfinal transaction") self.log.info("getblocktemplate: Test nonfinal transaction")
txlist[0][-4:] = b'\xff\xff\xff\xff' bad_block = copy.deepcopy(block)
assert_template(node, tmpl, txlist, 'bad-txns-nonfinal') bad_block.vtx[0].nLockTime = 2 ** 32 - 1
txlist[0][-4:] = b'\0\0\0\0' bad_block.vtx[0].rehash()
assert_template(node, bad_block, 'bad-txns-nonfinal')
self.log.info("getblocktemplate: Test bad tx count") self.log.info("getblocktemplate: Test bad tx count")
txlist.append(b'') # The tx count is immediately after the block header
assert_raises_jsonrpc(-22, 'Block decode failed', assert_template, node, tmpl, txlist, 'n/a') TX_COUNT_OFFSET = 80
txlist.pop() bad_block_sn = bytearray(block.serialize())
assert_equal(bad_block_sn[TX_COUNT_OFFSET], 1)
bad_block_sn[TX_COUNT_OFFSET] += 1
assert_raises_jsonrpc(-22, "Block decode failed", node.getblocktemplate, {'data': b2x(bad_block_sn), 'mode': 'proposal'})
self.log.info("getblocktemplate: Test bad bits") self.log.info("getblocktemplate: Test bad bits")
realbits = tmpl['bits'] bad_block = copy.deepcopy(block)
tmpl['bits'] = '1c0000ff' # impossible in the real world bad_block.nBits = 469762303 # impossible in the real world
assert_template(node, tmpl, txlist, 'bad-diffbits') assert_template(node, bad_block, 'bad-diffbits')
tmpl['bits'] = realbits
self.log.info("getblocktemplate: Test bad merkle root") self.log.info("getblocktemplate: Test bad merkle root")
rawtmpl = template_to_bytearray(tmpl, txlist) bad_block = copy.deepcopy(block)
rawtmpl[4 + 32] = (rawtmpl[4 + 32] + 1) % 0x100 bad_block.hashMerkleRoot += 1
rsp = node.getblocktemplate({'data': b2x(rawtmpl), 'mode': 'proposal'}) assert_template(node, bad_block, 'bad-txnmrklroot', False)
assert_equal(rsp, 'bad-txnmrklroot')
self.log.info("getblocktemplate: Test bad timestamps") self.log.info("getblocktemplate: Test bad timestamps")
realtime = tmpl['curtime'] bad_block = copy.deepcopy(block)
tmpl['curtime'] = 0x7fffffff bad_block.nTime = 2 ** 31 - 1
assert_template(node, tmpl, txlist, 'time-too-new') assert_template(node, bad_block, 'time-too-new')
tmpl['curtime'] = 0 bad_block.nTime = 0
assert_template(node, tmpl, txlist, 'time-too-old') assert_template(node, bad_block, 'time-too-old')
tmpl['curtime'] = realtime
self.log.info("getblocktemplate: Test valid block") self.log.info("getblocktemplate: Test valid block")
assert_template(node, tmpl, txlist, None) assert_template(node, block, None)
self.log.info("getblocktemplate: Test not best block") self.log.info("getblocktemplate: Test not best block")
tmpl['previousblockhash'] = 'ff00' * 16 bad_block = copy.deepcopy(block)
assert_template(node, tmpl, txlist, 'inconclusive-not-best-prevblk') bad_block.hashPrevBlock = 123
assert_template(node, bad_block, 'inconclusive-not-best-prevblk')
if __name__ == '__main__': if __name__ == '__main__':
GetBlockTemplateProposalTest().main() GetBlockTemplateProposalTest().main()