def test_null_locators(self, test_node, inv_node):
tip = self.nodes[0].getblockheader(self.nodes[0].generatetoaddress(
1, self.nodes[0].get_deterministic_priv_key().address)[0])
tip_hash = int(tip["hash"], 16)
final_tx = get_final_tx_info(self.nodes[0])
inv_node.check_last_inv_announcement(inv=[tip_hash])
test_node.check_last_inv_announcement(inv=[tip_hash])
self.log.info(
"Verify getheaders with null locator and valid hashstop returns headers."
)
test_node.clear_block_announcements()
test_node.send_get_headers(locator=[], hashstop=tip_hash)
test_node.check_last_headers_announcement(headers=[tip_hash])
self.log.info(
"Verify getheaders with null locator and invalid hashstop does not return headers."
)
block = create_block(int(tip["hash"], 16),
create_coinbase(tip["height"] + 1),
tip["mediantime"] + 1)
final_tx = add_final_tx(final_tx, block)
block.solve()
test_node.send_header_for_blocks([block])
test_node.clear_block_announcements()
test_node.send_get_headers(locator=[], hashstop=int(block.hash, 16))
test_node.sync_with_ping()
assert_equal(test_node.block_announced, False)
inv_node.clear_block_announcements()
test_node.send_message(msg_block(block))
inv_node.check_last_inv_announcement(inv=[int(block.hash, 16)])
def submit_block_with_tx(node, tx):
ctx = CTransaction()
ctx.deserialize(io.BytesIO(hex_str_to_bytes(tx)))
tip = node.getbestblockhash()
height = node.getblockcount() + 1
block_time = node.getblockheader(tip)["mediantime"] + 1
block = create_block(int(tip, 16), create_coinbase(height), block_time)
block.vtx.append(ctx)
if height > 100:
add_final_tx(get_final_tx_info(node), block)
block.rehash()
block.hashMerkleRoot = block.calc_merkle_root()
add_witness_commitment(block)
block.solve()
node.submitblock(bytes_to_hex_str(block.serialize(True)))
return block
def test_bip68_not_consensus(self):
assert (get_bip9_status(self.nodes[0], 'locktime')['status'] !=
'active')
txid = self.nodes[0].sendtoaddress(self.nodes[0].getnewaddress(), 2)
tx1 = FromHex(CTransaction(), self.nodes[0].getrawtransaction(txid))
tx1.rehash()
# Make an anyone-can-spend transaction
tx2 = CTransaction()
tx2.nVersion = 1
tx2.vin = [CTxIn(COutPoint(tx1.sha256, 0), nSequence=0)]
tx2.vout = [
CTxOut(int(tx1.vout[0].nValue - self.relayfee * COIN),
CScript([b'a']))
]
# sign tx2
tx2_raw = self.nodes[0].signrawtransactionwithwallet(ToHex(tx2))["hex"]
tx2 = FromHex(tx2, tx2_raw)
tx2.rehash()
self.nodes[0].sendrawtransaction(ToHex(tx2))
# Now make an invalid spend of tx2 according to BIP68
sequence_value = 100 # 100 block relative locktime
tx3 = CTransaction()
tx3.nVersion = 2
tx3.vin = [CTxIn(COutPoint(tx2.sha256, 0), nSequence=sequence_value)]
tx3.vout = [
CTxOut(int(tx2.vout[0].nValue - self.relayfee * COIN),
CScript([b'a' * 35]))
]
tx3.rehash()
assert_raises_rpc_error(-26, NOT_FINAL_ERROR,
self.nodes[0].sendrawtransaction, ToHex(tx3))
# make a block that violates bip68; ensure that the tip updates
tip = int(self.nodes[0].getbestblockhash(), 16)
final_tx = get_final_tx_info(self.nodes[0])
block = create_block(
tip, create_coinbase(self.nodes[0].getblockcount() + 1))
block.nVersion = 3
block.vtx.extend([tx1, tx2, tx3])
final_tx = add_final_tx(final_tx, block)
block.hashMerkleRoot = block.calc_merkle_root()
block.rehash()
add_witness_commitment(block)
block.solve()
self.nodes[0].submitblock(bytes_to_hex_str(block.serialize(True)))
assert_equal(self.nodes[0].getbestblockhash(), block.hash)
def run_test(self):
node = self.nodes[0] # alias
node.add_p2p_connection(P2PStoreTxInvs())
self.log.info("Create a new transaction and wait until it's broadcast")
txid = int(node.sendtoaddress(node.getnewaddress(), 1), 16)
# Can take a few seconds due to transaction trickling
wait_until(lambda: node.p2p.tx_invs_received[txid] >= 1,
lock=mininode_lock)
# Add a second peer since txs aren't rebroadcast to the same peer (see filterInventoryKnown)
node.add_p2p_connection(P2PStoreTxInvs())
self.log.info("Create a block")
# Create and submit a block without the transaction.
# Transactions are only rebroadcast if there has been a block at least five minutes
# after the last time we tried to broadcast. Use mocktime and give an extra minute to be sure.
block_time = int(time.time()) + 6 * 60
node.setmocktime(block_time)
block = create_block(
int(node.getbestblockhash(), 16),
create_coinbase(node.getblockchaininfo()['blocks'] + 1),
block_time)
add_final_tx(get_final_tx_info(node), block)
block.nVersion = 3
block.rehash()
block.solve()
node.submitblock(ToHex(block))
# Transaction should not be rebroadcast
node.p2ps[1].sync_with_ping()
assert_equal(node.p2ps[1].tx_invs_received[txid], 0)
self.log.info("Transaction should be rebroadcast after 30 minutes")
# Use mocktime and give an extra 5 minutes to be sure.
rebroadcast_time = int(time.time()) + 41 * 60
node.setmocktime(rebroadcast_time)
wait_until(lambda: node.p2ps[1].tx_invs_received[txid] >= 1,
lock=mininode_lock)
def create_test_block(self, txs, version=536870912):
block = create_block(self.tip, create_coinbase(self.tipheight + 1),
self.last_block_time + 600)
block.nVersion = version
block.vtx.extend(txs)
self.next_final_tx = self.final_tx
if self.tipheight >= 100:
self.next_final_tx = add_final_tx(self.final_tx, block)
block.hashMerkleRoot = block.calc_merkle_root()
block.rehash()
block.solve()
return block
def send_blocks_with_version(self, peer, numblocks, version):
"""Send numblocks blocks to peer with version set"""
tip = self.nodes[0].getbestblockhash()
height = self.nodes[0].getblockcount()
block_time = self.nodes[0].getblockheader(tip)["time"] + 1
tip = int(tip, 16)
final_tx = False
for _ in range(numblocks):
block = create_block(tip, create_coinbase(height + 1), block_time)
block.nVersion = version
if height >= 100:
if not final_tx:
final_tx = get_final_tx_info(self.nodes[0])
final_tx = add_final_tx(final_tx, block)
block.solve()
peer.send_message(msg_block(block))
block_time += 1
height += 1
tip = block.sha256
peer.sync_with_ping()
def run_test(self):
self.nodes[0].add_p2p_connection(P2PInterface())
self.log.info("Mining %d blocks", DERSIG_HEIGHT - 2)
self.coinbase_txids = [
self.nodes[0].getblock(b)['tx'][0]
for b in self.nodes[0].generate(DERSIG_HEIGHT - 2)
]
self.nodeaddress = self.nodes[0].getnewaddress()
self.log.info(
"Test that a transaction with non-DER signature can still appear in a block"
)
final_tx = get_final_tx_info(self.nodes[0])
spendtx = create_transaction(self.nodes[0],
self.coinbase_txids[0],
self.nodeaddress,
amount=1.0)
unDERify(spendtx)
spendtx.rehash()
tip = self.nodes[0].getbestblockhash()
block_time = self.nodes[0].getblockheader(tip)['mediantime'] + 1
block = create_block(int(tip, 16), create_coinbase(DERSIG_HEIGHT - 1),
block_time)
final_tx = add_final_tx(final_tx, block)
block.nVersion = 2
block.vtx.insert(-1, spendtx)
block.hashMerkleRoot = block.calc_merkle_root()
block.rehash()
block.solve()
self.nodes[0].p2p.send_and_ping(msg_block(block))
assert_equal(self.nodes[0].getbestblockhash(), block.hash)
self.log.info("Test that blocks must now be at least version 3")
tip = block.sha256
block_time += 1
block = create_block(tip, create_coinbase(DERSIG_HEIGHT), block_time)
final_tx = add_final_tx(final_tx, block)
block.nVersion = 2
block.rehash()
block.solve()
with self.nodes[0].assert_debug_log(expected_msgs=[
'{}, bad-version(0x00000002)'.format(block.hash)
]):
self.nodes[0].p2p.send_and_ping(msg_block(block))
assert_equal(int(self.nodes[0].getbestblockhash(), 16), tip)
self.nodes[0].p2p.sync_with_ping()
self.log.info(
"Test that transactions with non-DER signatures cannot appear in a block"
)
block.nVersion = 3
spendtx = create_transaction(self.nodes[0],
self.coinbase_txids[1],
self.nodeaddress,
amount=1.0)
unDERify(spendtx)
spendtx.rehash()
# First we show that this tx is valid except for DERSIG by getting it
# rejected from the mempool for exactly that reason.
assert_equal([{
'txid':
spendtx.hash,
'allowed':
False,
'reject-reason':
'64: non-mandatory-script-verify-flag (Non-canonical DER signature)'
}],
self.nodes[0].testmempoolaccept(
rawtxs=[bytes_to_hex_str(spendtx.serialize())],
allowhighfees=True))
# Now we verify that a block with this transaction is also invalid.
block.vtx.insert(-1, spendtx)
block.hashMerkleRoot = block.calc_merkle_root()
block.rehash()
block.solve()
with self.nodes[0].assert_debug_log(expected_msgs=[
'CheckInputs on {} failed with non-mandatory-script-verify-flag (Non-canonical DER signature)'
.format(block.vtx[-2].hash)
]):
self.nodes[0].p2p.send_and_ping(msg_block(block))
assert_equal(int(self.nodes[0].getbestblockhash(), 16), tip)
self.nodes[0].p2p.sync_with_ping()
wait_until(lambda: "reject" in self.nodes[0].p2p.last_message.keys(),
lock=mininode_lock)
with mininode_lock:
assert self.nodes[0].p2p.last_message["reject"].code in [
REJECT_INVALID, REJECT_NONSTANDARD
]
assert_equal(self.nodes[0].p2p.last_message["reject"].data,
block.sha256)
assert b'Non-canonical DER signature' in self.nodes[
0].p2p.last_message["reject"].reason
self.log.info(
"Test that a version 3 block with a DERSIG-compliant transaction is accepted"
)
block.vtx[1] = create_transaction(self.nodes[0],
self.coinbase_txids[1],
self.nodeaddress,
amount=1.0)
block.hashMerkleRoot = block.calc_merkle_root()
block.rehash()
block.solve()
self.nodes[0].p2p.send_and_ping(msg_block(block))
assert_equal(int(self.nodes[0].getbestblockhash(), 16), block.sha256)
def test_nonnull_locators(self, test_node, inv_node):
tip = int(self.nodes[0].getbestblockhash(), 16)
# PART 1
# 1. Mine a block; expect inv announcements each time
self.log.info(
"Part 1: headers don't start before sendheaders message...")
for i in range(4):
self.log.debug("Part 1.{}: starting...".format(i))
old_tip = tip
tip = self.mine_blocks(1)
final_tx = get_final_tx_info(self.nodes[0])
inv_node.check_last_inv_announcement(inv=[tip])
test_node.check_last_inv_announcement(inv=[tip])
# Try a few different responses; none should affect next announcement
if i == 0:
# first request the block
test_node.send_get_data([tip])
test_node.wait_for_block(tip)
elif i == 1:
# next try requesting header and block
test_node.send_get_headers(locator=[old_tip], hashstop=tip)
test_node.send_get_data([tip])
test_node.wait_for_block(tip)
test_node.clear_block_announcements(
) # since we requested headers...
elif i == 2:
# this time announce own block via headers
inv_node.clear_block_announcements()
height = self.nodes[0].getblockcount()
last_time = self.nodes[0].getblock(
self.nodes[0].getbestblockhash())['time']
block_time = last_time + 1
new_block = create_block(tip, create_coinbase(height + 1),
block_time)
final_tx = add_final_tx(final_tx, new_block)
new_block.solve()
test_node.send_header_for_blocks([new_block])
test_node.wait_for_getdata([new_block.sha256])
test_node.send_message(msg_block(new_block))
test_node.sync_with_ping() # make sure this block is processed
wait_until(lambda: inv_node.block_announced,
timeout=60,
lock=mininode_lock)
inv_node.clear_block_announcements()
test_node.clear_block_announcements()
self.log.info("Part 1: success!")
self.log.info(
"Part 2: announce blocks with headers after sendheaders message..."
)
# PART 2
# 2. Send a sendheaders message and test that headers announcements
# commence and keep working.
test_node.send_message(msg_sendheaders())
prev_tip = int(self.nodes[0].getbestblockhash(), 16)
test_node.send_get_headers(locator=[prev_tip], hashstop=0)
test_node.sync_with_ping()
# Now that we've synced headers, headers announcements should work
tip = self.mine_blocks(1)
final_tx = get_final_tx_info(self.nodes[0])
inv_node.check_last_inv_announcement(inv=[tip])
test_node.check_last_headers_announcement(headers=[tip])
height = self.nodes[0].getblockcount() + 1
block_time += 10 # Advance far enough ahead
for i in range(10):
self.log.debug("Part 2.{}: starting...".format(i))
# Mine i blocks, and alternate announcing either via
# inv (of tip) or via headers. After each, new blocks
# mined by the node should successfully be announced
# with block header, even though the blocks are never requested
for j in range(2):
self.log.debug("Part 2.{}.{}: starting...".format(i, j))
blocks = []
for b in range(i + 1):
block = create_block(tip, create_coinbase(height),
block_time)
final_tx = add_final_tx(final_tx, block)
blocks.append(block)
blocks[-1].solve()
tip = blocks[-1].sha256
block_time += 1
height += 1
if j == 0:
# Announce via inv
test_node.send_block_inv(tip)
test_node.wait_for_getheaders()
# Should have received a getheaders now
test_node.send_header_for_blocks(blocks)
# Test that duplicate inv's won't result in duplicate
# getdata requests, or duplicate headers announcements
[inv_node.send_block_inv(x.sha256) for x in blocks]
test_node.wait_for_getdata([x.sha256 for x in blocks])
inv_node.sync_with_ping()
else:
# Announce via headers
test_node.send_header_for_blocks(blocks)
test_node.wait_for_getdata([x.sha256 for x in blocks])
# Test that duplicate headers won't result in duplicate
# getdata requests (the check is further down)
inv_node.send_header_for_blocks(blocks)
inv_node.sync_with_ping()
[test_node.send_message(msg_block(x)) for x in blocks]
test_node.sync_with_ping()
inv_node.sync_with_ping()
# This block should not be announced to the inv node (since it also
# broadcast it)
assert "inv" not in inv_node.last_message
assert "headers" not in inv_node.last_message
tip = self.mine_blocks(1)
final_tx = get_final_tx_info(self.nodes[0])
inv_node.check_last_inv_announcement(inv=[tip])
test_node.check_last_headers_announcement(headers=[tip])
height += 1
block_time += 1
self.log.info("Part 2: success!")
self.log.info(
"Part 3: headers announcements can stop after large reorg, and resume after headers/inv from peer..."
)
# PART 3. Headers announcements can stop after large reorg, and resume after
# getheaders or inv from peer.
for j in range(2):
self.log.debug("Part 3.{}: starting...".format(j))
# First try mining a reorg that can propagate with header announcement
new_block_hashes = self.mine_reorg(length=7)
tip = new_block_hashes[-1]
inv_node.check_last_inv_announcement(inv=[tip])
test_node.check_last_headers_announcement(headers=new_block_hashes)
block_time += 8
# Mine a too-large reorg, which should be announced with a single inv
new_block_hashes = self.mine_reorg(length=8)
tip = new_block_hashes[-1]
inv_node.check_last_inv_announcement(inv=[tip])
test_node.check_last_inv_announcement(inv=[tip])
block_time += 9
fork_point = self.nodes[0].getblock(
"%064x" % new_block_hashes[0])["previousblockhash"]
fork_point = int(fork_point, 16)
# Use getblocks/getdata
test_node.send_getblocks(locator=[fork_point])
test_node.check_last_inv_announcement(inv=new_block_hashes)
test_node.send_get_data(new_block_hashes)
test_node.wait_for_block(new_block_hashes[-1])
for i in range(3):
self.log.debug("Part 3.{}.{}: starting...".format(j, i))
# Mine another block, still should get only an inv
tip = self.mine_blocks(1)
inv_node.check_last_inv_announcement(inv=[tip])
test_node.check_last_inv_announcement(inv=[tip])
if i == 0:
# Just get the data -- shouldn't cause headers announcements to resume
test_node.send_get_data([tip])
test_node.wait_for_block(tip)
elif i == 1:
# Send a getheaders message that shouldn't trigger headers announcements
# to resume (best header sent will be too old)
test_node.send_get_headers(locator=[fork_point],
hashstop=new_block_hashes[1])
test_node.send_get_data([tip])
test_node.wait_for_block(tip)
elif i == 2:
# This time, try sending either a getheaders to trigger resumption
# of headers announcements, or mine a new block and inv it, also
# triggering resumption of headers announcements.
test_node.send_get_data([tip])
test_node.wait_for_block(tip)
if j == 0:
test_node.send_get_headers(locator=[tip], hashstop=0)
test_node.sync_with_ping()
else:
test_node.send_block_inv(tip)
test_node.sync_with_ping()
# New blocks should now be announced with header
tip = self.mine_blocks(1)
inv_node.check_last_inv_announcement(inv=[tip])
test_node.check_last_headers_announcement(headers=[tip])
self.log.info("Part 3: success!")
self.log.info("Part 4: Testing direct fetch behavior...")
tip = self.mine_blocks(1)
height = self.nodes[0].getblockcount() + 1
last_time = self.nodes[0].getblock(
self.nodes[0].getbestblockhash())['time']
block_time = last_time + 1
final_tx = get_final_tx_info(self.nodes[0])
# Create 2 blocks. Send the blocks, then send the headers.
blocks = []
for b in range(2):
block = create_block(tip, create_coinbase(height), block_time)
final_tx = add_final_tx(final_tx, block)
blocks.append(block)
blocks[-1].solve()
tip = blocks[-1].sha256
block_time += 1
height += 1
inv_node.send_message(msg_block(blocks[-1]))
inv_node.sync_with_ping() # Make sure blocks are processed
test_node.last_message.pop("getdata", None)
test_node.send_header_for_blocks(blocks)
test_node.sync_with_ping()
# should not have received any getdata messages
with mininode_lock:
assert "getdata" not in test_node.last_message
# This time, direct fetch should work
blocks = []
for b in range(3):
block = create_block(tip, create_coinbase(height), block_time)
final_tx = add_final_tx(final_tx, block)
if not blocks:
old_final_tx = final_tx
blocks.append(block)
blocks[-1].solve()
tip = blocks[-1].sha256
block_time += 1
height += 1
test_node.send_header_for_blocks(blocks)
test_node.sync_with_ping()
test_node.wait_for_getdata([x.sha256 for x in blocks],
timeout=DIRECT_FETCH_RESPONSE_TIME)
[test_node.send_message(msg_block(x)) for x in blocks]
test_node.sync_with_ping()
# Now announce a header that forks the last two blocks
tip = blocks[0].sha256
height -= 2
blocks = []
final_tx = old_final_tx
# Create extra blocks for later
for b in range(20):
block = create_block(tip, create_coinbase(height), block_time)
final_tx = add_final_tx(final_tx, block)
blocks.append(block)
blocks[-1].solve()
tip = blocks[-1].sha256
block_time += 1
height += 1
# Announcing one block on fork should not trigger direct fetch
# (less work than tip)
test_node.last_message.pop("getdata", None)
test_node.send_header_for_blocks(blocks[0:1])
test_node.sync_with_ping()
with mininode_lock:
assert "getdata" not in test_node.last_message
# Announcing one more block on fork should trigger direct fetch for
# both blocks (same work as tip)
test_node.send_header_for_blocks(blocks[1:2])
test_node.sync_with_ping()
test_node.wait_for_getdata([x.sha256 for x in blocks[0:2]],
timeout=DIRECT_FETCH_RESPONSE_TIME)
# Announcing 16 more headers should trigger direct fetch for 14 more
# blocks
test_node.send_header_for_blocks(blocks[2:18])
test_node.sync_with_ping()
test_node.wait_for_getdata([x.sha256 for x in blocks[2:16]],
timeout=DIRECT_FETCH_RESPONSE_TIME)
# Announcing 1 more header should not trigger any response
test_node.last_message.pop("getdata", None)
test_node.send_header_for_blocks(blocks[18:19])
test_node.sync_with_ping()
with mininode_lock:
assert "getdata" not in test_node.last_message
self.log.info("Part 4: success!")
# Now deliver all those blocks we announced.
[test_node.send_message(msg_block(x)) for x in blocks]
self.log.info("Part 5: Testing handling of unconnecting headers")
# First we test that receipt of an unconnecting header doesn't prevent
# chain sync.
for i in range(10):
self.log.debug("Part 5.{}: starting...".format(i))
test_node.last_message.pop("getdata", None)
blocks = []
# Create two more blocks.
for j in range(2):
block = create_block(tip, create_coinbase(height), block_time)
final_tx = add_final_tx(final_tx, block)
blocks.append(block)
blocks[-1].solve()
tip = blocks[-1].sha256
block_time += 1
height += 1
# Send the header of the second block -> this won't connect.
with mininode_lock:
test_node.last_message.pop("getheaders", None)
test_node.send_header_for_blocks([blocks[1]])
test_node.wait_for_getheaders()
test_node.send_header_for_blocks(blocks)
test_node.wait_for_getdata([x.sha256 for x in blocks])
[test_node.send_message(msg_block(x)) for x in blocks]
test_node.sync_with_ping()
assert_equal(int(self.nodes[0].getbestblockhash(), 16),
blocks[1].sha256)
blocks = []
# Now we test that if we repeatedly don't send connecting headers, we
# don't go into an infinite loop trying to get them to connect.
MAX_UNCONNECTING_HEADERS = 10
for j in range(MAX_UNCONNECTING_HEADERS + 1):
block = create_block(tip, create_coinbase(height), block_time)
final_tx = add_final_tx(final_tx, block)
blocks.append(block)
blocks[-1].solve()
tip = blocks[-1].sha256
block_time += 1
height += 1
for i in range(1, MAX_UNCONNECTING_HEADERS):
# Send a header that doesn't connect, check that we get a getheaders.
with mininode_lock:
test_node.last_message.pop("getheaders", None)
test_node.send_header_for_blocks([blocks[i]])
test_node.wait_for_getheaders()
# Next header will connect, should re-set our count:
test_node.send_header_for_blocks([blocks[0]])
# Remove the first two entries (blocks[1] would connect):
blocks = blocks[2:]
# Now try to see how many unconnecting headers we can send
# before we get disconnected. Should be 5*MAX_UNCONNECTING_HEADERS
for i in range(5 * MAX_UNCONNECTING_HEADERS - 1):
# Send a header that doesn't connect, check that we get a getheaders.
with mininode_lock:
test_node.last_message.pop("getheaders", None)
test_node.send_header_for_blocks([blocks[i % len(blocks)]])
test_node.wait_for_getheaders()
# Eventually this stops working.
test_node.send_header_for_blocks([blocks[-1]])
# Should get disconnected
test_node.wait_for_disconnect()
self.log.info("Part 5: success!")
# Finally, check that the inv node never received a getdata request,
# throughout the test
assert "getdata" not in inv_node.last_message
def run_test(self):
# Add p2p connection to node0
node = self.nodes[0] # convenience reference to the node
node.add_p2p_connection(P2PDataStore())
# Let freicoind handle the block-final initial output logic
self.nodes[0].generate(1)
best_block = node.getblock(node.getbestblockhash())
tip = int(node.getbestblockhash(), 16)
height = best_block["height"] + 1
block_time = best_block["time"] + 1
self.log.info("Create a new block with an anyone-can-spend coinbase")
height = self.nodes[0].getblockcount() + 1
block = create_block(tip, create_coinbase(height), block_time)
block.solve()
# Save the coinbase for later
block1 = block
tip = block.sha256
node.p2p.send_blocks_and_test([block1], node, success=True)
self.log.info("Mature the block.")
node.generatetoaddress(100, node.get_deterministic_priv_key().address)
best_block = node.getblock(node.getbestblockhash())
tip = int(node.getbestblockhash(), 16)
height = best_block["height"] + 1
block_time = best_block["time"] + 1
final_tx = get_final_tx_info(node)
# Use merkle-root malleability to generate an invalid block with
# same blockheader.
# Manufacture a block with 3 transactions (coinbase, spend of prior
# coinbase, spend of that spend). Duplicate the 3rd transaction to
# leave merkle root and blockheader unchanged but invalidate the block.
self.log.info("Test merkle root malleability.")
block2 = create_block(tip, create_coinbase(height), block_time)
block_time += 1
# b'0x51' is OP_TRUE
tx1 = create_tx_with_script(block1.vtx[0], 0, script_sig=b'\x51', amount=50 * COIN)
tx2 = create_tx_with_script(tx1, 0, script_sig=b'\x51', amount=50 * COIN)
block2.vtx.extend([tx1])
block2.hashMerkleRoot = block2.calc_merkle_root()
add_final_tx(final_tx, block2)
block2.rehash()
block2.solve()
orig_hash = block2.sha256
block2_orig = copy.deepcopy(block2)
# Mutate block 2
block2.vtx.append(block2.vtx[-1])
assert_equal(block2.hashMerkleRoot, block2.calc_merkle_root())
assert_equal(orig_hash, block2.rehash())
assert block2_orig.vtx != block2.vtx
node.p2p.send_blocks_and_test([block2], node, success=False, reject_reason='bad-txns-duplicate')
# Check transactions for duplicate inputs
self.log.info("Test duplicate input block.")
block2_orig.vtx[1].vin.append(block2_orig.vtx[1].vin[0])
block2_orig.vtx[1].rehash()
block2_orig.hashMerkleRoot = block2_orig.calc_merkle_root()
block2_orig.rehash()
block2_orig.solve()
node.p2p.send_blocks_and_test([block2_orig], node, success=False, reject_reason='bad-txns-inputs-duplicate')
self.log.info("Test very broken block.")
block3 = create_block(tip, create_coinbase(height), block_time)
block_time += 1
block3.vtx[0].vout[0].nValue = 1000000 * COIN # Too high!
block3.vtx[0].sha256 = None
block3.vtx[0].calc_sha256()
block3.hashMerkleRoot = block3.calc_merkle_root()
final_tx = add_final_tx(final_tx, block3)
block3.rehash()
block3.solve()
node.p2p.send_blocks_and_test([block3], node, success=False, reject_reason='bad-cb-amount')
def run_test(self):
self.mine_chain()
node = self.nodes[0]
def assert_submitblock(block, result_str_1, result_str_2=None):
block.solve()
result_str_2 = result_str_2 or 'duplicate-invalid'
assert_equal(result_str_1, node.submitblock(hexdata=b2x(block.serialize())))
assert_equal(result_str_2, node.submitblock(hexdata=b2x(block.serialize())))
self.log.info('getmininginfo')
mining_info = node.getmininginfo()
assert_equal(mining_info['blocks'], 200)
assert_equal(mining_info['chain'], 'regtest')
assert 'currentblocktx' not in mining_info
assert 'currentblockweight' not in mining_info
assert_equal(mining_info['difficulty'], Decimal('4.656542373906925E-10'))
assert_equal(mining_info['networkhashps'], Decimal('0.003333333333333334'))
assert_equal(mining_info['pooledtx'], 0)
# Mine a block to leave initial block download
node.generatetoaddress(1, node.get_deterministic_priv_key().address)
tmpl = node.getblocktemplate({'rules': ['segwit','auxpow']})
self.log.info("getblocktemplate: Test capability advertised")
assert 'proposal' in tmpl['capabilities']
assert 'coinbasetxn' not in tmpl
next_height = int(tmpl["height"])
coinbase_tx = create_coinbase(height=next_height)
# sequence numbers must not be max for nLockTime to have effect
coinbase_tx.vin[0].nSequence = 2 ** 32 - 2
coinbase_tx.rehash()
# round-trip the encoded bip34 block height commitment
assert_equal(CScriptNum.decode(coinbase_tx.vin[0].scriptSig), next_height)
# round-trip negative and multi-byte CScriptNums to catch python regression
assert_equal(CScriptNum.decode(CScriptNum.encode(CScriptNum(1500))), 1500)
assert_equal(CScriptNum.decode(CScriptNum.encode(CScriptNum(-1500))), -1500)
assert_equal(CScriptNum.decode(CScriptNum.encode(CScriptNum(-1))), -1)
block = CBlock()
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]
if 'finaltx' in tmpl and 'prevout' in tmpl['finaltx']:
add_final_tx(tmpl['finaltx']['prevout'], block)
self.log.info("getblocktemplate: segwit rule must be set")
assert_raises_rpc_error(-8, "getblocktemplate must be called with the segwit rule set", node.getblocktemplate)
self.log.info("getblocktemplate: Test valid block")
assert_template(node, block, None)
self.log.info("submitblock: Test block decode failure")
assert_raises_rpc_error(-22, "Block decode failed", node.submitblock, b2x(block.serialize()[:-15]))
self.log.info("getblocktemplate: Test bad input hash for coinbase transaction")
bad_block = copy.deepcopy(block)
bad_block.vtx[0].vin[0].prevout.hash += 1
bad_block.vtx[0].rehash()
assert_template(node, bad_block, 'bad-cb-missing')
self.log.info("submitblock: Test invalid coinbase transaction")
assert_raises_rpc_error(-22, "Block does not start with a coinbase", node.submitblock, b2x(bad_block.serialize()))
self.log.info("getblocktemplate: Test truncated final transaction")
assert_raises_rpc_error(-22, "Block decode failed", node.getblocktemplate, {'data': b2x(block.serialize()[:-1]), 'mode': 'proposal', 'rules': ['segwit']})
self.log.info("getblocktemplate: Test duplicate transaction")
bad_block = copy.deepcopy(block)
bad_block.vtx.insert(-1, bad_block.vtx[0])
assert_template(node, bad_block, 'bad-txns-duplicate')
assert_submitblock(bad_block, 'bad-txns-duplicate', 'bad-txns-duplicate')
self.log.info("getblocktemplate: Test invalid transaction")
bad_block = copy.deepcopy(block)
bad_tx = copy.deepcopy(bad_block.vtx[0])
bad_tx.vin[0].prevout.hash = 255
bad_tx.rehash()
bad_block.vtx.insert(-1, bad_tx)
assert_template(node, bad_block, 'bad-txns-inputs-missingorspent')
assert_submitblock(bad_block, 'bad-txns-inputs-missingorspent')
self.log.info("getblocktemplate: Test nonfinal transaction")
bad_block = copy.deepcopy(block)
bad_block.vtx[0].nLockTime = 2 ** 32 - 1
bad_block.vtx[0].rehash()
assert_template(node, bad_block, 'bad-txns-nonfinal')
assert_submitblock(bad_block, 'bad-txns-nonfinal')
self.log.info("getblocktemplate: Test bad tx count")
# The tx count is immediately after the block header
bad_block_sn = bytearray(block.serialize())
assert_equal(bad_block_sn[BLOCK_HEADER_SIZE], 2)
bad_block_sn[BLOCK_HEADER_SIZE] += 1
assert_raises_rpc_error(-22, "Block decode failed", node.getblocktemplate, {'data': b2x(bad_block_sn), 'mode': 'proposal', 'rules': ['segwit', 'auxpow']})
self.log.info("getblocktemplate: Test bad bits")
bad_block = copy.deepcopy(block)
bad_block.nBits = 469762303 # impossible in the real world
assert_template(node, bad_block, 'bad-diffbits')
self.log.info("getblocktemplate: Test bad merkle root")
bad_block = copy.deepcopy(block)
bad_block.hashMerkleRoot += 1
assert_template(node, bad_block, 'bad-txnmrklroot', False)
assert_submitblock(bad_block, 'bad-txnmrklroot', 'bad-txnmrklroot')
self.log.info("getblocktemplate: Test bad timestamps")
bad_block = copy.deepcopy(block)
bad_block.nTime = 2 ** 31 - 1
assert_template(node, bad_block, 'time-too-new')
assert_submitblock(bad_block, 'time-too-new', 'time-too-new')
bad_block.nTime = 0
assert_template(node, bad_block, 'time-too-old')
assert_submitblock(bad_block, 'time-too-old', 'time-too-old')
self.log.info("getblocktemplate: Test not best block")
bad_block = copy.deepcopy(block)
bad_block.hashPrevBlock = 123
assert_template(node, bad_block, 'inconclusive-not-best-prevblk')
assert_submitblock(bad_block, 'prev-blk-not-found', 'prev-blk-not-found')
self.log.info('submitheader tests')
assert_raises_rpc_error(-22, 'Block header decode failed', lambda: node.submitheader(hexdata='xx' * BLOCK_HEADER_SIZE))
assert_raises_rpc_error(-22, 'Block header decode failed', lambda: node.submitheader(hexdata='ff' * (BLOCK_HEADER_SIZE-2)))
assert_raises_rpc_error(-25, 'Must submit previous header', lambda: node.submitheader(hexdata=b2x(super(CBlock, bad_block).serialize())))
block.nTime += 1
block.solve()
def chain_tip(b_hash, *, status='headers-only', branchlen=1):
return {'hash': b_hash, 'height': 202, 'branchlen': branchlen, 'status': status}
assert chain_tip(block.hash) not in node.getchaintips()
node.submitheader(hexdata=b2x(block.serialize()))
assert chain_tip(block.hash) in node.getchaintips()
node.submitheader(hexdata=b2x(CBlockHeader(block).serialize())) # Noop
assert chain_tip(block.hash) in node.getchaintips()
bad_block_root = copy.deepcopy(block)
bad_block_root.hashMerkleRoot += 2
bad_block_root.solve()
assert chain_tip(bad_block_root.hash) not in node.getchaintips()
node.submitheader(hexdata=b2x(CBlockHeader(bad_block_root).serialize()))
assert chain_tip(bad_block_root.hash) in node.getchaintips()
# Should still reject invalid blocks, even if we have the header:
assert_equal(node.submitblock(hexdata=b2x(bad_block_root.serialize())), 'bad-txnmrklroot')
assert_equal(node.submitblock(hexdata=b2x(bad_block_root.serialize())), 'bad-txnmrklroot')
assert chain_tip(bad_block_root.hash) in node.getchaintips()
# We know the header for this invalid block, so should just return early without error:
node.submitheader(hexdata=b2x(CBlockHeader(bad_block_root).serialize()))
assert chain_tip(bad_block_root.hash) in node.getchaintips()
bad_block_lock = copy.deepcopy(block)
bad_block_lock.vtx[0].nLockTime = 2**32 - 1
bad_block_lock.vtx[0].rehash()
bad_block_lock.hashMerkleRoot = bad_block_lock.calc_merkle_root()
bad_block_lock.solve()
assert_equal(node.submitblock(hexdata=b2x(bad_block_lock.serialize())), 'bad-txns-nonfinal')
assert_equal(node.submitblock(hexdata=b2x(bad_block_lock.serialize())), 'duplicate-invalid')
# Build a "good" block on top of the submitted bad block
bad_block2 = copy.deepcopy(block)
bad_block2.hashPrevBlock = bad_block_lock.sha256
bad_block2.solve()
assert_raises_rpc_error(-25, 'bad-prevblk', lambda: node.submitheader(hexdata=b2x(CBlockHeader(bad_block2).serialize())))
# Should reject invalid header right away
bad_block_time = copy.deepcopy(block)
bad_block_time.nTime = 1
bad_block_time.solve()
assert_raises_rpc_error(-25, 'time-too-old', lambda: node.submitheader(hexdata=b2x(CBlockHeader(bad_block_time).serialize())))
# Should ask for the block from a p2p node, if they announce the header as well:
node.add_p2p_connection(P2PDataStore())
node.p2p.wait_for_getheaders(timeout=5) # Drop the first getheaders
node.p2p.send_blocks_and_test(blocks=[block], node=node)
# Must be active now:
assert chain_tip(block.hash, status='active', branchlen=0) in node.getchaintips()
# Building a few blocks should give the same results
node.generatetoaddress(10, node.get_deterministic_priv_key().address)
assert_raises_rpc_error(-25, 'time-too-old', lambda: node.submitheader(hexdata=b2x(CBlockHeader(bad_block_time).serialize())))
assert_raises_rpc_error(-25, 'bad-prevblk', lambda: node.submitheader(hexdata=b2x(CBlockHeader(bad_block2).serialize())))
node.submitheader(hexdata=b2x(CBlockHeader(block).serialize()))
node.submitheader(hexdata=b2x(CBlockHeader(bad_block_root).serialize()))
assert_equal(node.submitblock(hexdata=b2x(block.serialize())), 'duplicate') # valid
def run_test(self):
p2p0 = self.nodes[0].add_p2p_connection(BaseNode())
# Build the blockchain
self.tip = int(self.nodes[0].getbestblockhash(), 16)
self.block_time = self.nodes[0].getblock(
self.nodes[0].getbestblockhash())['time'] + 1
self.blocks = []
# Get a pubkey for the coinbase TXO
coinbase_key = ECKey()
coinbase_key.generate()
coinbase_pubkey = coinbase_key.get_pubkey().get_bytes()
# Create the first block with a coinbase output to our key
height = 1
block = create_block(self.tip, create_coinbase(height,
coinbase_pubkey),
self.block_time)
block.vtx[0].vout.insert(0, CTxOut(0, CScript([OP_TRUE])))
block.vtx[0].rehash()
final_tx = [{
'txid': block.vtx[0].hash,
'vout': 0,
'amount': 0,
}]
block.hashMerkleRoot = block.calc_merkle_root()
block.rehash()
self.blocks.append(block)
self.block_time += 1
block.solve()
# Save the coinbase for later
self.block1 = block
self.tip = block.sha256
height += 1
# Bury the block 100 deep so the coinbase output is spendable
for i in range(100):
block = create_block(self.tip, create_coinbase(height),
self.block_time)
if height > 100:
final_tx = add_final_tx(final_tx, block)
block.solve()
self.blocks.append(block)
self.tip = block.sha256
self.block_time += 1
height += 1
# Create a transaction spending the coinbase output with an invalid (null) signature
tx = CTransaction()
tx.vin.append(
CTxIn(COutPoint(self.block1.vtx[0].sha256, 1), scriptSig=b""))
tx.vout.append(CTxOut(49 * 100000000, CScript([OP_TRUE])))
tx.calc_sha256()
block102 = create_block(self.tip, create_coinbase(height),
self.block_time)
self.block_time += 1
block102.vtx.extend([tx])
final_tx = add_final_tx(final_tx, block102)
block102.hashMerkleRoot = block102.calc_merkle_root()
block102.rehash()
block102.solve()
self.blocks.append(block102)
self.tip = block102.sha256
self.block_time += 1
height += 1
# Bury the assumed valid block 2100 deep
for i in range(2100):
block = create_block(self.tip, create_coinbase(height),
self.block_time)
final_tx = add_final_tx(final_tx, block)
block.nVersion = 4
block.solve()
self.blocks.append(block)
self.tip = block.sha256
self.block_time += 1
height += 1
self.nodes[0].disconnect_p2ps()
# Start node1 and node2 with assumevalid so they accept a block with a bad signature.
self.start_node(1, extra_args=["-assumevalid=" + hex(block102.sha256)])
self.start_node(2, extra_args=["-assumevalid=" + hex(block102.sha256)])
p2p0 = self.nodes[0].add_p2p_connection(BaseNode())
p2p1 = self.nodes[1].add_p2p_connection(BaseNode())
p2p2 = self.nodes[2].add_p2p_connection(BaseNode())
# send header lists to all three nodes
p2p0.send_header_for_blocks(self.blocks[0:2000])
p2p0.send_header_for_blocks(self.blocks[2000:])
p2p1.send_header_for_blocks(self.blocks[0:2000])
p2p1.send_header_for_blocks(self.blocks[2000:])
p2p2.send_header_for_blocks(self.blocks[0:200])
# Send blocks to node0. Block 102 will be rejected.
self.send_blocks_until_disconnected(p2p0)
self.assert_blockchain_height(self.nodes[0], 101)
# Send all blocks to node1. All blocks will be accepted.
for i in range(2202):
p2p1.send_message(msg_block(self.blocks[i]))
# Syncing 2200 blocks can take a while on slow systems. Give it plenty of time to sync.
p2p1.sync_with_ping(200)
assert_equal(
self.nodes[1].getblock(self.nodes[1].getbestblockhash())['height'],
2202)
# Send blocks to node2. Block 102 will be rejected.
self.send_blocks_until_disconnected(p2p2)
self.assert_blockchain_height(self.nodes[2], 101)
def test_sequence_lock_unconfirmed_inputs(self):
# Store height so we can easily reset the chain at the end of the test
cur_height = self.nodes[0].getblockcount()
# Create a mempool tx.
txid = self.nodes[0].sendtoaddress(self.nodes[0].getnewaddress(), 2)
tx1 = FromHex(CTransaction(), self.nodes[0].getrawtransaction(txid))
tx1.rehash()
# Anyone-can-spend mempool tx.
# Sequence lock of 0 should pass.
tx2 = CTransaction()
tx2.nVersion = 2
tx2.vin = [CTxIn(COutPoint(tx1.sha256, 0), nSequence=0)]
tx2.vout = [
CTxOut(int(tx1.vout[0].nValue - self.relayfee * COIN),
CScript([b'a']))
]
tx2_raw = self.nodes[0].signrawtransactionwithwallet(ToHex(tx2))["hex"]
tx2 = FromHex(tx2, tx2_raw)
tx2.rehash()
self.nodes[0].sendrawtransaction(tx2_raw)
# Create a spend of the 0th output of orig_tx with a sequence lock
# of 1, and test what happens when submitting.
# orig_tx.vout[0] must be an anyone-can-spend output
def test_nonzero_locks(orig_tx, node, relayfee, use_height_lock):
sequence_value = 1
if not use_height_lock:
sequence_value |= SEQUENCE_LOCKTIME_TYPE_FLAG
tx = CTransaction()
tx.nVersion = 2
tx.vin = [
CTxIn(COutPoint(orig_tx.sha256, 0), nSequence=sequence_value)
]
tx.vout = [
CTxOut(int(orig_tx.vout[0].nValue - relayfee * COIN),
CScript([b'a' * 35]))
]
tx.rehash()
if (orig_tx.hash in node.getrawmempool()):
# sendrawtransaction should fail if the tx is in the mempool
assert_raises_rpc_error(-26, NOT_FINAL_ERROR,
node.sendrawtransaction, ToHex(tx))
else:
# sendrawtransaction should succeed if the tx is not in the mempool
node.sendrawtransaction(ToHex(tx))
return tx
test_nonzero_locks(tx2,
self.nodes[0],
self.relayfee,
use_height_lock=True)
test_nonzero_locks(tx2,
self.nodes[0],
self.relayfee,
use_height_lock=False)
# Now mine some blocks, but make sure tx2 doesn't get mined.
# Use prioritisetransaction to lower the effective feerate to 0
self.nodes[0].prioritisetransaction(txid=tx2.hash,
fee_delta=int(-self.relayfee *
COIN))
cur_time = int(time.time())
for i in range(10):
self.nodes[0].setmocktime(cur_time + 600)
self.nodes[0].generate(1)
cur_time += 600
assert (tx2.hash in self.nodes[0].getrawmempool())
test_nonzero_locks(tx2,
self.nodes[0],
self.relayfee,
use_height_lock=True)
test_nonzero_locks(tx2,
self.nodes[0],
self.relayfee,
use_height_lock=False)
# Save the block-final tx info for later reorg
final_tx = get_final_tx_info(self.nodes[0])
# Mine tx2, and then try again
self.nodes[0].prioritisetransaction(txid=tx2.hash,
fee_delta=int(self.relayfee *
COIN))
# Advance the time on the node so that we can test timelocks
self.nodes[0].setmocktime(cur_time + 600)
self.nodes[0].generate(1)
assert (tx2.hash not in self.nodes[0].getrawmempool())
# Now that tx2 is not in the mempool, a sequence locked spend should
# succeed
tx3 = test_nonzero_locks(tx2,
self.nodes[0],
self.relayfee,
use_height_lock=False)
assert (tx3.hash in self.nodes[0].getrawmempool())
self.nodes[0].generate(1)
assert (tx3.hash not in self.nodes[0].getrawmempool())
# One more test, this time using height locks
tx4 = test_nonzero_locks(tx3,
self.nodes[0],
self.relayfee,
use_height_lock=True)
assert (tx4.hash in self.nodes[0].getrawmempool())
# Now try combining confirmed and unconfirmed inputs
tx5 = test_nonzero_locks(tx4,
self.nodes[0],
self.relayfee,
use_height_lock=True)
assert (tx5.hash not in self.nodes[0].getrawmempool())
utxos = self.nodes[0].listunspent()
tx5.vin.append(
CTxIn(COutPoint(int(utxos[0]["txid"], 16), utxos[0]["vout"]),
nSequence=1))
tx5.vout[0].nValue += int(utxos[0]["amount"] * COIN)
raw_tx5 = self.nodes[0].signrawtransactionwithwallet(ToHex(tx5))["hex"]
assert_raises_rpc_error(-26, NOT_FINAL_ERROR,
self.nodes[0].sendrawtransaction, raw_tx5)
# Test mempool-BIP68 consistency after reorg
#
# State of the transactions in the last blocks:
# ... -> [ tx2 ] -> [ tx3 ]
# tip-1 tip
# And currently tx4 is in the mempool.
#
# If we invalidate the tip, tx3 should get added to the mempool, causing
# tx4 to be removed (fails sequence-lock).
self.nodes[0].invalidateblock(self.nodes[0].getbestblockhash())
assert (tx4.hash not in self.nodes[0].getrawmempool())
assert (tx3.hash in self.nodes[0].getrawmempool())
# Now mine 2 empty blocks to reorg out the current tip (labeled tip-1 in
# diagram above).
# This would cause tx2 to be added back to the mempool, which in turn causes
# tx3 to be removed.
tip = int(
self.nodes[0].getblockhash(self.nodes[0].getblockcount() - 1), 16)
height = self.nodes[0].getblockcount()
for i in range(2):
block = create_block(tip, create_coinbase(height), cur_time)
final_tx = add_final_tx(final_tx, block)
block.nVersion = 3
block.rehash()
block.solve()
tip = block.sha256
height += 1
self.nodes[0].submitblock(ToHex(block))
cur_time += 1
mempool = self.nodes[0].getrawmempool()
assert (tx3.hash not in mempool)
assert (tx2.hash in mempool)
# Reset the chain and get rid of the mocktimed-blocks
self.nodes[0].setmocktime(0)
self.nodes[0].invalidateblock(self.nodes[0].getblockhash(cur_height +
1))
self.nodes[0].generate(10)
def run_test(self):
# Setup the p2p connections
# test_node connects to node0 (not whitelisted)
test_node = self.nodes[0].add_p2p_connection(P2PInterface())
# min_work_node connects to node1 (whitelisted)
min_work_node = self.nodes[1].add_p2p_connection(P2PInterface())
# 1. Have nodes mine a block (leave IBD)
[
n.generatetoaddress(1,
n.get_deterministic_priv_key().address)
for n in self.nodes
]
tips = [int("0x" + n.getbestblockhash(), 0) for n in self.nodes]
# 2. Send one block that builds on each tip.
# This should be accepted by node0
blocks_h2 = [] # the height 2 blocks on each node's chain
block_time = int(time.time()) + 1
for i in range(2):
blocks_h2.append(
create_block(tips[i], create_coinbase(2), block_time))
blocks_h2[i].solve()
block_time += 1
test_node.send_message(msg_block(blocks_h2[0]))
min_work_node.send_message(msg_block(blocks_h2[1]))
for x in [test_node, min_work_node]:
x.sync_with_ping()
assert_equal(self.nodes[0].getblockcount(), 2)
assert_equal(self.nodes[1].getblockcount(), 1)
self.log.info(
"First height 2 block accepted by node0; correctly rejected by node1"
)
# 3. Send another block that builds on genesis.
block_h1f = create_block(int("0x" + self.nodes[0].getblockhash(0), 0),
create_coinbase(1), block_time)
block_time += 1
block_h1f.solve()
test_node.send_message(msg_block(block_h1f))
test_node.sync_with_ping()
tip_entry_found = False
for x in self.nodes[0].getchaintips():
if x['hash'] == block_h1f.hash:
assert_equal(x['status'], "headers-only")
tip_entry_found = True
assert (tip_entry_found)
assert_raises_rpc_error(-1, "Block not found on disk",
self.nodes[0].getblock, block_h1f.hash)
# 4. Send another two block that build on the fork.
block_h2f = create_block(block_h1f.sha256, create_coinbase(2),
block_time)
block_time += 1
block_h2f.solve()
test_node.send_message(msg_block(block_h2f))
test_node.sync_with_ping()
# Since the earlier block was not processed by node, the new block
# can't be fully validated.
tip_entry_found = False
for x in self.nodes[0].getchaintips():
if x['hash'] == block_h2f.hash:
assert_equal(x['status'], "headers-only")
tip_entry_found = True
assert (tip_entry_found)
# But this block should be accepted by node since it has equal work.
self.nodes[0].getblock(block_h2f.hash)
self.log.info("Second height 2 block accepted, but not reorg'ed to")
# 4b. Now send another block that builds on the forking chain.
block_h3 = create_block(block_h2f.sha256, create_coinbase(3),
block_h2f.nTime + 1)
block_h3.solve()
test_node.send_message(msg_block(block_h3))
test_node.sync_with_ping()
# Since the earlier block was not processed by node, the new block
# can't be fully validated.
tip_entry_found = False
for x in self.nodes[0].getchaintips():
if x['hash'] == block_h3.hash:
assert_equal(x['status'], "headers-only")
tip_entry_found = True
assert (tip_entry_found)
self.nodes[0].getblock(block_h3.hash)
# But this block should be accepted by node since it has more work.
self.nodes[0].getblock(block_h3.hash)
self.log.info("Unrequested more-work block accepted")
# 4c. Now mine 288 more blocks and deliver; all should be processed but
# the last (height-too-high) on node (as long as it is not missing any headers)
tip = block_h3
final_tx = [{
'txid': block_h1f.vtx[0].hash,
'vout': 0,
'amount': 0,
}]
all_blocks = []
for i in range(288):
height = i + 4
next_block = create_block(tip.sha256, create_coinbase(height),
tip.nTime + 1)
if height > 100:
final_tx = add_final_tx(final_tx, next_block)
next_block.solve()
all_blocks.append(next_block)
tip = next_block
# Now send the block at height 5 and check that it wasn't accepted (missing header)
test_node.send_message(msg_block(all_blocks[1]))
test_node.sync_with_ping()
assert_raises_rpc_error(-5, "Block not found", self.nodes[0].getblock,
all_blocks[1].hash)
assert_raises_rpc_error(-5, "Block not found",
self.nodes[0].getblockheader,
all_blocks[1].hash)
# The block at height 5 should be accepted if we provide the missing header, though
headers_message = msg_headers()
headers_message.headers.append(CBlockHeader(all_blocks[0]))
test_node.send_message(headers_message)
test_node.send_message(msg_block(all_blocks[1]))
test_node.sync_with_ping()
self.nodes[0].getblock(all_blocks[1].hash)
# Now send the blocks in all_blocks
for i in range(288):
test_node.send_message(msg_block(all_blocks[i]))
test_node.sync_with_ping()
# Blocks 1-287 should be accepted, block 288 should be ignored because it's too far ahead
for x in all_blocks[:-1]:
self.nodes[0].getblock(x.hash)
assert_raises_rpc_error(-1, "Block not found on disk",
self.nodes[0].getblock, all_blocks[-1].hash)
# 5. Test handling of unrequested block on the node that didn't process
# Should still not be processed (even though it has a child that has more
# work).
# The node should have requested the blocks at some point, so
# disconnect/reconnect first
self.nodes[0].disconnect_p2ps()
self.nodes[1].disconnect_p2ps()
test_node = self.nodes[0].add_p2p_connection(P2PInterface())
test_node.send_message(msg_block(block_h1f))
test_node.sync_with_ping()
assert_equal(self.nodes[0].getblockcount(), 2)
self.log.info(
"Unrequested block that would complete more-work chain was ignored"
)
# 6. Try to get node to request the missing block.
# Poke the node with an inv for block at height 3 and see if that
# triggers a getdata on block 2 (it should if block 2 is missing).
with mininode_lock:
# Clear state so we can check the getdata request
test_node.last_message.pop("getdata", None)
test_node.send_message(msg_inv([CInv(2, block_h3.sha256)]))
test_node.sync_with_ping()
with mininode_lock:
getdata = test_node.last_message["getdata"]
# Check that the getdata includes the right block
assert_equal(getdata.inv[0].hash, block_h1f.sha256)
self.log.info("Inv at tip triggered getdata for unprocessed block")
# 7. Send the missing block for the third time (now it is requested)
test_node.send_message(msg_block(block_h1f))
test_node.sync_with_ping()
assert_equal(self.nodes[0].getblockcount(), 290)
self.nodes[0].getblock(all_blocks[286].hash)
assert_equal(self.nodes[0].getbestblockhash(), all_blocks[286].hash)
assert_raises_rpc_error(-1, "Block not found on disk",
self.nodes[0].getblock, all_blocks[287].hash)
self.log.info(
"Successfully reorged to longer chain from non-whitelisted peer")
# 8. Create a chain which is invalid at a height longer than the
# current chain, but which has more blocks on top of that
block_289f = create_block(all_blocks[284].sha256, create_coinbase(289),
all_blocks[284].nTime + 1)
block_289f.solve()
block_290f = create_block(block_289f.sha256, create_coinbase(290),
block_289f.nTime + 1)
block_290f.solve()
block_291 = create_block(block_290f.sha256, create_coinbase(291),
block_290f.nTime + 1)
# block_291 spends a coinbase below maturity!
block_291.vtx.append(
create_tx_with_script(block_290f.vtx[0],
0,
script_sig=b"42",
amount=1))
block_291.hashMerkleRoot = block_291.calc_merkle_root()
block_291.solve()
block_292 = create_block(block_291.sha256, create_coinbase(292),
block_291.nTime + 1)
block_292.solve()
# Now send all the headers on the chain and enough blocks to trigger reorg
headers_message = msg_headers()
headers_message.headers.append(CBlockHeader(block_289f))
headers_message.headers.append(CBlockHeader(block_290f))
headers_message.headers.append(CBlockHeader(block_291))
headers_message.headers.append(CBlockHeader(block_292))
test_node.send_message(headers_message)
test_node.sync_with_ping()
tip_entry_found = False
for x in self.nodes[0].getchaintips():
if x['hash'] == block_292.hash:
assert_equal(x['status'], "headers-only")
tip_entry_found = True
assert (tip_entry_found)
assert_raises_rpc_error(-1, "Block not found on disk",
self.nodes[0].getblock, block_292.hash)
test_node.send_message(msg_block(block_289f))
test_node.send_message(msg_block(block_290f))
test_node.sync_with_ping()
self.nodes[0].getblock(block_289f.hash)
self.nodes[0].getblock(block_290f.hash)
test_node.send_message(msg_block(block_291))
# At this point we've sent an obviously-bogus block, wait for full processing
# without assuming whether we will be disconnected or not
try:
# Only wait a short while so the test doesn't take forever if we do get
# disconnected
test_node.sync_with_ping(timeout=1)
except AssertionError:
test_node.wait_for_disconnect()
self.nodes[0].disconnect_p2ps()
test_node = self.nodes[0].add_p2p_connection(P2PInterface())
# We should have failed reorg and switched back to 290 (but have block 291)
assert_equal(self.nodes[0].getblockcount(), 290)
assert_equal(self.nodes[0].getbestblockhash(), all_blocks[286].hash)
assert_equal(self.nodes[0].getblock(block_291.hash)["confirmations"],
-1)
# Now send a new header on the invalid chain, indicating we're forked off, and expect to get disconnected
block_293 = create_block(block_292.sha256, create_coinbase(293),
block_292.nTime + 1)
block_293.solve()
headers_message = msg_headers()
headers_message.headers.append(CBlockHeader(block_293))
test_node.send_message(headers_message)
test_node.wait_for_disconnect()
# 9. Connect node1 to node0 and ensure it is able to sync
connect_nodes(self.nodes[0], 1)
sync_blocks([self.nodes[0], self.nodes[1]])
self.log.info("Successfully synced nodes 1 and 0")
