def test_getblocktxn_requests(self, node, test_node, version):
with_witness = (version == 2)
def test_getblocktxn_response(compact_block, peer, expected_result):
msg = msg_cmpctblock(compact_block.to_p2p())
peer.send_and_ping(msg)
with mininode_lock:
assert ("getblocktxn" in peer.last_message)
absolute_indexes = peer.last_message[
"getblocktxn"].block_txn_request.to_absolute()
assert_equal(absolute_indexes, expected_result)
def test_tip_after_message(node, peer, msg, tip):
peer.send_and_ping(msg)
assert_equal(int(node.getbestblockhash(), 16), tip)
# First try announcing compactblocks that won't reconstruct, and verify
# that we receive getblocktxn messages back.
utxo = self.utxos.pop(0)
block = self.build_block_with_transactions(node, utxo, 5)
self.utxos.append(
[block.vtx[-1].sha256, 0, block.vtx[-1].vout[0].nValue])
comp_block = HeaderAndShortIDs()
comp_block.initialize_from_block(block, use_witness=with_witness)
test_getblocktxn_response(comp_block, test_node, [1, 2, 3, 4, 5])
msg_bt = msg_blocktxn()
if with_witness:
msg_bt = msg_witness_blocktxn() # serialize with witnesses
msg_bt.block_transactions = BlockTransactions(block.sha256,
block.vtx[1:])
test_tip_after_message(node, test_node, msg_bt, block.sha256)
utxo = self.utxos.pop(0)
block = self.build_block_with_transactions(node, utxo, 5)
self.utxos.append(
[block.vtx[-1].sha256, 0, block.vtx[-1].vout[0].nValue])
# Now try interspersing the prefilled transactions
comp_block.initialize_from_block(block,
prefill_list=[0, 1, 5],
use_witness=with_witness)
test_getblocktxn_response(comp_block, test_node, [2, 3, 4])
msg_bt.block_transactions = BlockTransactions(block.sha256,
block.vtx[2:5])
test_tip_after_message(node, test_node, msg_bt, block.sha256)
# Now try giving one transaction ahead of time.
utxo = self.utxos.pop(0)
block = self.build_block_with_transactions(node, utxo, 5)
self.utxos.append(
[block.vtx[-1].sha256, 0, block.vtx[-1].vout[0].nValue])
test_node.send_and_ping(msg_tx(block.vtx[1]))
assert (block.vtx[1].hash in node.getrawmempool())
# Prefill 4 out of the 6 transactions, and verify that only the one
# that was not in the mempool is requested.
comp_block.initialize_from_block(block,
prefill_list=[0, 2, 3, 4],
use_witness=with_witness)
test_getblocktxn_response(comp_block, test_node, [5])
msg_bt.block_transactions = BlockTransactions(block.sha256,
[block.vtx[5]])
test_tip_after_message(node, test_node, msg_bt, block.sha256)
# Now provide all transactions to the node before the block is
# announced and verify reconstruction happens immediately.
utxo = self.utxos.pop(0)
block = self.build_block_with_transactions(node, utxo, 10)
self.utxos.append(
[block.vtx[-1].sha256, 0, block.vtx[-1].vout[0].nValue])
for tx in block.vtx[1:]:
test_node.send_message(msg_tx(tx))
test_node.sync_with_ping()
# Make sure all transactions were accepted.
mempool = node.getrawmempool()
for tx in block.vtx[1:]:
assert (tx.hash in mempool)
# Clear out last request.
with mininode_lock:
test_node.last_message.pop("getblocktxn", None)
# Send compact block
comp_block.initialize_from_block(block,
prefill_list=[0],
use_witness=with_witness)
test_tip_after_message(node, test_node,
msg_cmpctblock(comp_block.to_p2p()),
block.sha256)
with mininode_lock:
# Shouldn't have gotten a request for any transaction
assert ("getblocktxn" not in test_node.last_message)
def test_incorrect_blocktxn_response(self, node, test_node, version):
if (len(self.utxos) == 0):
self.make_utxos()
utxo = self.utxos.pop(0)
block = self.build_block_with_transactions(node, utxo, 10)
self.utxos.append(
[block.vtx[-1].sha256, 0, block.vtx[-1].vout[0].nValue])
# Relay the first 5 transactions from the block in advance
for tx in block.vtx[1:6]:
test_node.send_message(msg_tx(tx))
test_node.sync_with_ping()
# Make sure all transactions were accepted.
mempool = node.getrawmempool()
for tx in block.vtx[1:6]:
assert (tx.hash in mempool)
# Send compact block
comp_block = HeaderAndShortIDs()
comp_block.initialize_from_block(block,
prefill_list=[0],
use_witness=(version == 2))
test_node.send_and_ping(msg_cmpctblock(comp_block.to_p2p()))
absolute_indexes = []
with mininode_lock:
assert ("getblocktxn" in test_node.last_message)
absolute_indexes = test_node.last_message[
"getblocktxn"].block_txn_request.to_absolute()
assert_equal(absolute_indexes, [6, 7, 8, 9, 10])
# Now give an incorrect response.
# Note that it's possible for bitcoind to be smart enough to know we're
# lying, since it could check to see if the shortid matches what we're
# sending, and eg disconnect us for misbehavior. If that behavior
# change was made, we could just modify this test by having a
# different peer provide the block further down, so that we're still
# verifying that the block isn't marked bad permanently. This is good
# enough for now.
msg = msg_blocktxn()
if version == 2:
msg = msg_witness_blocktxn()
msg.block_transactions = BlockTransactions(
block.sha256, [block.vtx[5]] + block.vtx[7:])
test_node.send_and_ping(msg)
# Tip should not have updated
assert_equal(int(node.getbestblockhash(), 16), block.hashPrevBlock)
# We should receive a getdata request
wait_until(lambda: "getdata" in test_node.last_message,
timeout=10,
lock=mininode_lock)
assert_equal(len(test_node.last_message["getdata"].inv), 1)
assert (test_node.last_message["getdata"].inv[0].type == 2
or test_node.last_message["getdata"].inv[0].type
== 2 | MSG_WITNESS_FLAG)
assert_equal(test_node.last_message["getdata"].inv[0].hash,
block.sha256)
# Deliver the block
if version == 2:
test_node.send_and_ping(msg_witness_block(block))
else:
test_node.send_and_ping(msg_block(block))
assert_equal(int(node.getbestblockhash(), 16), block.sha256)
def test_compactblocks_not_at_tip(self, test_node):
node = self.nodes[0]
# Test that requesting old compactblocks doesn't work.
MAX_CMPCTBLOCK_DEPTH = 5
new_blocks = []
for _ in range(MAX_CMPCTBLOCK_DEPTH + 1):
test_node.clear_block_announcement()
new_blocks.append(node.generate(1)[0])
test_node.wait_until(test_node.received_block_announcement,
timeout=30)
test_node.clear_block_announcement()
test_node.send_message(
msg_getdata([CInv(MSG_CMPCT_BLOCK, int(new_blocks[0], 16))]))
test_node.wait_until(lambda: "cmpctblock" in test_node.last_message,
timeout=30)
test_node.clear_block_announcement()
node.generate(1)
test_node.wait_until(test_node.received_block_announcement, timeout=30)
test_node.clear_block_announcement()
with p2p_lock:
test_node.last_message.pop("block", None)
test_node.send_message(
msg_getdata([CInv(MSG_CMPCT_BLOCK, int(new_blocks[0], 16))]))
test_node.wait_until(lambda: "block" in test_node.last_message,
timeout=30)
with p2p_lock:
test_node.last_message["block"].block.calc_sha256()
assert_equal(test_node.last_message["block"].block.sha256,
int(new_blocks[0], 16))
# Generate an old compactblock, and verify that it's not accepted.
cur_height = node.getblockcount()
hashPrevBlock = int(node.getblockhash(cur_height - 5), 16)
block = self.build_block_on_tip(node)
block.hashPrevBlock = hashPrevBlock
block.solve()
comp_block = HeaderAndShortIDs()
comp_block.initialize_from_block(block)
test_node.send_and_ping(msg_cmpctblock(comp_block.to_p2p()))
tips = node.getchaintips()
found = False
for x in tips:
if x["hash"] == block.hash:
assert_equal(x["status"], "headers-only")
found = True
break
assert found
# Requesting this block via getblocktxn should silently fail
# (to avoid fingerprinting attacks).
msg = msg_getblocktxn()
msg.block_txn_request = BlockTransactionsRequest(block.sha256, [0])
with p2p_lock:
test_node.last_message.pop("blocktxn", None)
test_node.send_and_ping(msg)
with p2p_lock:
assert "blocktxn" not in test_node.last_message
def test_compactblock_construction(self, node, test_node, version,
use_witness_address):
# Generate a bunch of transactions.
node.generate(1010)
num_transactions = 25
address = node.getnewaddress()
if use_witness_address:
# Want at least one segwit spend, so move all funds to
# a witness address.
address = node.addwitnessaddress(address)
value_to_send = node.getbalance()
node.sendtoaddress(address,
satoshi_round(value_to_send - Decimal(0.1)))
node.generate(1)
segwit_tx_generated = False
for i in range(num_transactions):
txid = node.sendtoaddress(address, 0.1)
hex_tx = node.gettransaction(txid)["hex"]
tx = FromHex(CTransaction(), hex_tx)
if not tx.wit.is_null():
segwit_tx_generated = True
if use_witness_address:
assert (segwit_tx_generated) # check that our test is not broken
# Wait until we've seen the block announcement for the resulting tip
tip = int(node.getbestblockhash(), 16)
test_node.wait_for_block_announcement(tip)
# Make sure we will receive a fast-announce compact block
self.request_cb_announcements(test_node, node, version)
# Now mine a block, and look at the resulting compact block.
test_node.clear_block_announcement()
block_hash = int(node.generate(1)[0], 16)
# Store the raw block in our internal format.
block = FromHex(CBlock(), node.getblock("%02x" % block_hash, False))
for tx in block.vtx:
tx.calc_sha256()
block.rehash()
# Wait until the block was announced (via compact blocks)
wait_until(test_node.received_block_announcement,
timeout=60,
lock=mininode_lock)
# Now fetch and check the compact block
header_and_shortids = None
with mininode_lock:
assert ("cmpctblock" in test_node.last_message)
# Convert the on-the-wire representation to absolute indexes
header_and_shortids = HeaderAndShortIDs(
test_node.last_message["cmpctblock"].header_and_shortids)
self.check_compactblock_construction_from_block(
version, header_and_shortids, block_hash, block)
# Now fetch the compact block using a normal non-announce getdata
with mininode_lock:
test_node.clear_block_announcement()
inv = CInv(4, block_hash) # 4 == "CompactBlock"
test_node.send_message(msg_getdata([inv]))
wait_until(test_node.received_block_announcement,
timeout=30,
lock=mininode_lock)
# Now fetch and check the compact block
header_and_shortids = None
with mininode_lock:
assert ("cmpctblock" in test_node.last_message)
# Convert the on-the-wire representation to absolute indexes
header_and_shortids = HeaderAndShortIDs(
test_node.last_message["cmpctblock"].header_and_shortids)
self.check_compactblock_construction_from_block(
version, header_and_shortids, block_hash, block)
def test_compactblock_construction(self, node, test_node):
# Generate a bunch of transactions.
node.generate(101)
num_transactions = 25
address = node.getnewaddress()
for i in range(num_transactions):
txid = node.sendtoaddress(address, 0.1)
hex_tx = node.gettransaction(txid)["hex"]
tx = FromHex(CTransaction(), hex_tx)
# Wait until we've seen the block announcement for the resulting tip
tip = int(node.getbestblockhash(), 16)
test_node.wait_for_block_announcement(tip)
# Make sure we will receive a fast-announce compact block
self.request_cb_announcements(test_node, node)
# Now mine a block, and look at the resulting compact block.
test_node.clear_block_announcement()
block_hash = int(node.generate(1)[0], 16)
# Store the raw block in our internal format.
block = FromHex(CBlock(), node.getblock(
"{:02x}".format(block_hash), False))
for tx in block.vtx:
tx.calc_sha256()
block.rehash()
# Wait until the block was announced (via compact blocks)
wait_until(test_node.received_block_announcement,
timeout=30, lock=mininode_lock)
# Now fetch and check the compact block
header_and_shortids = None
with mininode_lock:
assert("cmpctblock" in test_node.last_message)
# Convert the on-the-wire representation to absolute indexes
header_and_shortids = HeaderAndShortIDs(
test_node.last_message["cmpctblock"].header_and_shortids)
self.check_compactblock_construction_from_block(
header_and_shortids, block_hash, block)
# Now fetch the compact block using a normal non-announce getdata
with mininode_lock:
test_node.clear_block_announcement()
inv = CInv(4, block_hash) # 4 == "CompactBlock"
test_node.send_message(msg_getdata([inv]))
wait_until(test_node.received_block_announcement,
timeout=30, lock=mininode_lock)
# Now fetch and check the compact block
header_and_shortids = None
with mininode_lock:
assert("cmpctblock" in test_node.last_message)
# Convert the on-the-wire representation to absolute indexes
header_and_shortids = HeaderAndShortIDs(
test_node.last_message["cmpctblock"].header_and_shortids)
self.check_compactblock_construction_from_block(
header_and_shortids, block_hash, block)
def test_compactblock_construction(self,
test_node,
use_witness_address=True):
version = test_node.cmpct_version
node = self.nodes[0]
# Generate a bunch of transactions.
node.generate(101)
num_transactions = 25
address = node.getnewaddress()
segwit_tx_generated = False
for _ in range(num_transactions):
txid = node.sendtoaddress(address, 0.1)
hex_tx = node.gettransaction(txid)["hex"]
tx = FromHex(CTransaction(), hex_tx)
if not tx.wit.is_null():
segwit_tx_generated = True
if use_witness_address:
assert segwit_tx_generated # check that our test is not broken
# Wait until we've seen the block announcement for the resulting tip
tip = int(node.getbestblockhash(), 16)
test_node.wait_for_block_announcement(tip)
# Make sure we will receive a fast-announce compact block
self.request_cb_announcements(test_node)
# Now mine a block, and look at the resulting compact block.
test_node.clear_block_announcement()
block_hash = int(node.generate(1)[0], 16)
# Store the raw block in our internal format.
block = FromHex(CBlock(), node.getblock("%064x" % block_hash, False))
for tx in block.vtx:
tx.calc_sha256()
block.rehash()
# Wait until the block was announced (via compact blocks)
test_node.wait_until(lambda: "cmpctblock" in test_node.last_message,
timeout=30)
# Now fetch and check the compact block
header_and_shortids = None
with p2p_lock:
# Convert the on-the-wire representation to absolute indexes
header_and_shortids = HeaderAndShortIDs(
test_node.last_message["cmpctblock"].header_and_shortids)
self.check_compactblock_construction_from_block(
version, header_and_shortids, block_hash, block)
# Now fetch the compact block using a normal non-announce getdata
test_node.clear_block_announcement()
inv = CInv(MSG_CMPCT_BLOCK, block_hash)
test_node.send_message(msg_getdata([inv]))
test_node.wait_until(lambda: "cmpctblock" in test_node.last_message,
timeout=30)
# Now fetch and check the compact block
header_and_shortids = None
with p2p_lock:
# Convert the on-the-wire representation to absolute indexes
header_and_shortids = HeaderAndShortIDs(
test_node.last_message["cmpctblock"].header_and_shortids)
self.check_compactblock_construction_from_block(
version, header_and_shortids, block_hash, block)
# Store the raw block in our internal format.
block = FromHex(CBlock(), node.getblock("%02x" % block_hash, False))
for tx in block.vtx:
tx.calc_sha256()
block.rehash()
# Wait until the block was announced (via compact blocks)
wait_until(test_node.received_block_announcement, timeout=30, lock=mininode_lock)
# Now fetch and check the compact block
header_and_shortids = None
with mininode_lock:
assert "cmpctblock" in test_node.last_message
# Convert the on-the-wire representation to absolute indexes
header_and_shortids = HeaderAndShortIDs(test_node.last_message["cmpctblock"].header_and_shortids)
self.check_compactblock_construction_from_block(version, header_and_shortids, block_hash, block)
# Now fetch the compact block using a normal non-announce getdata
with mininode_lock:
test_node.clear_block_announcement()
inv = CInv(4, block_hash) # 4 == "CompactBlock"
test_node.send_message(msg_getdata([inv]))
wait_until(test_node.received_block_announcement, timeout=30, lock=mininode_lock)
# Now fetch and check the compact block
header_and_shortids = None
with mininode_lock:
assert "cmpctblock" in test_node.last_message
# Convert the on-the-wire representation to absolute indexes
def run_test(self):
node = self.nodes[0]
default_p2p = node.add_p2p_connection(P2PDataStore())
test_p2p = node.add_p2p_connection(TestP2PConn())
# Set the blocksize to 2MB as initial condition
node.setexcessiveblock(self.excessive_block_size)
self.genesis_hash = int(node.getbestblockhash(), 16)
self.block_heights[self.genesis_hash] = 0
spendable_outputs = []
# save the current tip so it can be spent by a later block
def save_spendable_output():
spendable_outputs.append(self.tip)
# get an output that we previously marked as spendable
def get_spendable_output():
return PreviousSpendableOutput(spendable_outputs.pop(0).vtx[0], 0)
# move the tip back to a previous block
def tip(number):
self.tip = self.blocks[number]
# shorthand for functions
block = self.next_block
# Create a new block
block(0)
save_spendable_output()
default_p2p.send_blocks_and_test([self.tip], node)
# Now we need that block to mature so we can spend the coinbase.
maturity_blocks = []
for i in range(99):
block(5000 + i)
maturity_blocks.append(self.tip)
save_spendable_output()
# Get to one block of the May 15, 2018 HF activation
for i in range(6):
block(5100 + i)
maturity_blocks.append(self.tip)
# Send it all to the node at once.
default_p2p.send_blocks_and_test(maturity_blocks, node)
# collect spendable outputs now to avoid cluttering the code later on
out = []
for i in range(100):
out.append(get_spendable_output())
# Check that compact block also work for big blocks
# Wait for SENDCMPCT
def received_sendcmpct():
return (test_p2p.last_sendcmpct != None)
wait_until(received_sendcmpct, timeout=30)
sendcmpct = msg_sendcmpct()
sendcmpct.version = 1
sendcmpct.announce = True
test_p2p.send_and_ping(sendcmpct)
# Exchange headers
def received_getheaders():
return (test_p2p.last_getheaders != None)
wait_until(received_getheaders, timeout=30)
# Return the favor
test_p2p.send_message(test_p2p.last_getheaders)
# Wait for the header list
def received_headers():
return (test_p2p.last_headers != None)
wait_until(received_headers, timeout=30)
# It's like we know about the same headers !
test_p2p.send_message(test_p2p.last_headers)
# Send a block
b1 = block(1, spend=out[0], block_size=ONE_MEGABYTE + 1)
default_p2p.send_blocks_and_test([self.tip], node)
# Checks the node to forward it via compact block
def received_block():
return (test_p2p.last_cmpctblock != None)
wait_until(received_block, timeout=30)
# Was it our block ?
cmpctblk_header = test_p2p.last_cmpctblock.header_and_shortids.header
cmpctblk_header.calc_sha256()
assert cmpctblk_header.sha256 == b1.sha256
# Send a large block with numerous transactions.
test_p2p.clear_block_data()
b2 = block(2,
spend=out[1],
extra_txns=70000,
block_size=self.excessive_block_size - 1000)
default_p2p.send_blocks_and_test([self.tip], node)
# Checks the node forwards it via compact block
wait_until(received_block, timeout=30)
# Was it our block ?
cmpctblk_header = test_p2p.last_cmpctblock.header_and_shortids.header
cmpctblk_header.calc_sha256()
assert cmpctblk_header.sha256 == b2.sha256
# In order to avoid having to resend a ton of transactions, we invalidate
# b2, which will send all its transactions in the mempool. Note that this
# assumes reorgs will insert low-fee transactions back into the mempool.
node.invalidateblock(node.getbestblockhash())
# Let's send a compact block and see if the node accepts it.
# Let's modify b2 and use it so that we can reuse the mempool.
tx = b2.vtx[0]
tx.vout.append(CTxOut(0, CScript([random.randint(0, 256), OP_RETURN])))
tx.rehash()
b2.vtx[0] = tx
b2.hashMerkleRoot = b2.calc_merkle_root()
b2.solve()
# Now we create the compact block and send it
comp_block = HeaderAndShortIDs()
comp_block.initialize_from_block(b2)
test_p2p.send_and_ping(msg_cmpctblock(comp_block.to_p2p()))
# Check that compact block is received properly
assert int(node.getbestblockhash(), 16) == b2.sha256
def test_getblocktxn_requests(self, node, test_node):
def test_tip_after_message(node, peer, msg, tip):
peer.send_and_ping(msg)
assert_equal(int(node.getbestblockhash(), 16), tip)
# First try announcing compactblocks that won't reconstruct, and verify
# that we receive getblocktxn messages back.
utxo = self.utxos.pop(0)
block = self.build_block_with_transactions(node, utxo, 5)
self.utxos.append(
[block.unspent_tx.sha256, 0, block.unspent_tx.vout[0].nValue])
comp_block = HeaderAndShortIDs()
comp_block.initialize_from_block(block)
test_getblocktxn_response(block, comp_block, test_node, block.vtx[1:])
msg_bt = msg_blocktxn() # serialize with witnesses
msg_bt.block_transactions = BlockTransactions(block.sha256,
block.vtx[1:])
test_tip_after_message(node, test_node, msg_bt, block.sha256)
utxo = self.utxos.pop(0)
block = self.build_block_with_transactions(node, utxo, 5)
self.utxos.append(
[block.unspent_tx.sha256, 0, block.unspent_tx.vout[0].nValue])
# Now try interspersing the prefilled transactions
comp_block.initialize_from_block(block,
[block.first_tx, block.unspent_tx])
test_getblocktxn_response(block, comp_block, test_node,
block.middle_txs)
msg_bt.block_transactions = BlockTransactions(
block.sha256, sorted(block.middle_txs, key=lambda tx: tx.hash))
test_tip_after_message(node, test_node, msg_bt, block.sha256)
# Now try giving one transaction ahead of time.
utxo = self.utxos.pop(0)
block = self.build_block_with_transactions(node, utxo, 5)
self.utxos.append(
[block.unspent_tx.sha256, 0, block.unspent_tx.vout[0].nValue])
test_node.send_and_ping(msg_tx(block.first_tx))
assert block.first_tx.hash in node.getrawmempool()
# Prefill 4 out of the 6 transactions, and verify that only the one
# that was not in the mempool is requested.
comp_block.initialize_from_block(block, block.middle_txs)
test_getblocktxn_response(block, comp_block, test_node,
[block.unspent_tx])
msg_bt.block_transactions = BlockTransactions(block.sha256,
[block.unspent_tx])
test_tip_after_message(node, test_node, msg_bt, block.sha256)
# Now provide all transactions to the node before the block is
# announced and verify reconstruction happens immediately.
utxo = self.utxos.pop(0)
block = self.build_block_with_transactions(node, utxo, 10)
self.utxos.append(
[block.unspent_tx.sha256, 0, block.unspent_tx.vout[0].nValue])
for tx in block.vtx[1:]:
test_node.send_message(msg_tx(tx))
test_node.sync_with_ping()
# Make sure all transactions were accepted.
mempool = node.getrawmempool()
for tx in block.vtx[1:]:
assert tx.hash in mempool
# Clear out last request.
with mininode_lock:
test_node.last_message.pop("getblocktxn", None)
# Send compact block
comp_block.initialize_from_block(block)
test_tip_after_message(node, test_node,
msg_cmpctblock(comp_block.to_p2p()),
block.sha256)
with mininode_lock:
# Shouldn't have gotten a request for any transaction
assert "getblocktxn" not in test_node.last_message
def test_compactblock_construction(self, node, test_node,
use_witness_address):
# Generate a bunch of transactions.
node.generate(101)
num_transactions = 25
address = node.getnewaddress()
segwit_tx_generated = False
if use_witness_address:
# Want at least one segwit spend, so move some funds to
# a witness address.
address = node.addwitnessaddress(address)
value_to_send = 1000
segwit_txid = node.sendtoaddress(address,
satoshi_round(value_to_send))
segwit_tx = node.getrawtransaction(segwit_txid, 1)
vout = next(
filter(lambda vout: int(vout['value']) == 1000,
segwit_tx['vout']))
node.generate(1)
segwit_spend_txid = node.sendtypeto(
'', '', [{
'address': address,
'amount': 0.1
}], '', '', False,
{'inputs': [{
'tx': segwit_txid,
'n': vout['n']
}]})
segwit_spend_tx = node.gettransaction(segwit_spend_txid)
segwit_spend = FromHex(CTransaction(), segwit_spend_tx["hex"])
if not segwit_spend.wit.is_null():
segwit_tx_generated = True
num_transactions -= 1
for i in range(num_transactions):
node.sendtoaddress(address, 0.1)
if use_witness_address:
assert segwit_tx_generated # check that our test is not broken
# Wait until we've seen the block announcement for the resulting tip
tip = int(node.getbestblockhash(), 16)
test_node.wait_for_block_announcement(tip)
# Make sure we will receive a fast-announce compact block
self.request_cb_announcements(test_node, node)
# Now mine a block, and look at the resulting compact block.
test_node.clear_block_announcement()
block_hash = int(node.generate(1)[0], 16)
# Store the raw block in our internal format.
block = FromHex(CBlock(), node.getblock("%02x" % block_hash, False))
for tx in block.vtx:
tx.calc_sha256()
block.rehash()
# Wait until the block was announced (via compact blocks)
wait_until(test_node.received_block_announcement,
timeout=30,
lock=mininode_lock)
# Now fetch and check the compact block
header_and_shortids = None
with mininode_lock:
assert_in("cmpctblock", test_node.last_message)
# Convert the on-the-wire representation to absolute indexes
header_and_shortids = HeaderAndShortIDs(
test_node.last_message["cmpctblock"].header_and_shortids)
self.check_compactblock_construction_from_block(
header_and_shortids, block_hash, block)
# Now fetch the compact block using a normal non-announce getdata
with mininode_lock:
test_node.clear_block_announcement()
inv = CInv(4, block_hash) # 4 == "CompactBlock"
test_node.send_message(msg_getdata([inv]))
wait_until(test_node.received_block_announcement,
timeout=30,
lock=mininode_lock)
# Now fetch and check the compact block
header_and_shortids = None
with mininode_lock:
assert "cmpctblock" in test_node.last_message
# Convert the on-the-wire representation to absolute indexes
header_and_shortids = HeaderAndShortIDs(
test_node.last_message["cmpctblock"].header_and_shortids)
self.check_compactblock_construction_from_block(
header_and_shortids, block_hash, block)
def get_tests(self):
self.genesis_hash = int(self.nodes[0].getbestblockhash(), 16)
self.block_heights[self.genesis_hash] = 0
spendable_outputs = []
# save the current tip so it can be spent by a later block
def save_spendable_output():
spendable_outputs.append(self.tip)
# get an output that we previously marked as spendable
def get_spendable_output():
return PreviousSpendableOutput(spendable_outputs.pop(0).vtx[0], 0)
# returns a test case that asserts that the current tip was accepted
def accepted():
return TestInstance([[self.tip, True]])
# returns a test case that asserts that the current tip was rejected
def rejected(reject=None):
if reject is None:
return TestInstance([[self.tip, False]])
else:
return TestInstance([[self.tip, reject]])
# move the tip back to a previous block
def tip(number):
self.tip = self.blocks[number]
# shorthand for functions
block = self.next_block
# Create a new block
block(0)
save_spendable_output()
yield accepted()
# Now we need that block to mature so we can spend the coinbase.
test = TestInstance(sync_every_block=False)
for i in range(99):
block(5000 + i)
test.blocks_and_transactions.append([self.tip, True])
save_spendable_output()
# Get to one block of the May 15, 2018 HF activation
for i in range(6):
block(5100 + i)
test.blocks_and_transactions.append([self.tip, True])
# Send it all to the node at once.
yield test
# collect spendable outputs now to avoid cluttering the code later on
out = []
for i in range(100):
out.append(get_spendable_output())
# There can be only one network thread running at a time.
# Adding a new P2P connection here will try to start the network thread
# at init, which will throw an assertion because it's already running.
# This requires a few steps to avoid this:
# 1/ Disconnect all the TestManager nodes
# 2/ Terminate the network thread
# 3/ Add the new P2P connection
# 4/ Reconnect all the TestManager nodes
# 5/ Restart the network thread
# Disconnect all the TestManager nodes
[n.disconnect_node() for n in self.test.p2p_connections]
self.test.wait_for_disconnections()
self.test.clear_all_connections()
# Wait for the network thread to terminate
network_thread_join()
# Add the new connection
node = self.nodes[0]
node.add_p2p_connection(TestNode())
# Reconnect TestManager nodes
self.test.add_all_connections(self.nodes)
# Restart the network thread
network_thread_start()
# Wait for connection to be etablished
peer = node.p2p
peer.wait_for_verack()
# Check that compact block also work for big blocks
# Wait for SENDCMPCT
def received_sendcmpct():
return (peer.last_sendcmpct != None)
wait_until(received_sendcmpct, timeout=30)
sendcmpct = msg_sendcmpct()
sendcmpct.version = 1
sendcmpct.announce = True
peer.send_and_ping(sendcmpct)
# Exchange headers
def received_getheaders():
return (peer.last_getheaders != None)
wait_until(received_getheaders, timeout=30)
# Return the favor
peer.send_message(peer.last_getheaders)
# Wait for the header list
def received_headers():
return (peer.last_headers != None)
wait_until(received_headers, timeout=30)
# It's like we know about the same headers !
peer.send_message(peer.last_headers)
# Send a block
b1 = block(1, spend=out[0], block_size=ONE_MEGABYTE + 1)
yield accepted()
# Checks the node to forward it via compact block
def received_block():
return (peer.last_cmpctblock != None)
wait_until(received_block, timeout=30)
# Was it our block ?
cmpctblk_header = peer.last_cmpctblock.header_and_shortids.header
cmpctblk_header.calc_sha256()
assert (cmpctblk_header.sha256 == b1.sha256)
# Send a large block with numerous transactions.
peer.clear_block_data()
b2 = block(2,
spend=out[1],
extra_txns=70000,
block_size=self.excessive_block_size - 1000)
yield accepted()
# Checks the node forwards it via compact block
wait_until(received_block, timeout=30)
# Was it our block ?
cmpctblk_header = peer.last_cmpctblock.header_and_shortids.header
cmpctblk_header.calc_sha256()
assert (cmpctblk_header.sha256 == b2.sha256)
# In order to avoid having to resend a ton of transactions, we invalidate
# b2, which will send all its transactions in the mempool.
node.invalidateblock(node.getbestblockhash())
# Let's send a compact block and see if the node accepts it.
# Let's modify b2 and use it so that we can reuse the mempool.
tx = b2.vtx[0]
tx.vout.append(CTxOut(0, CScript([random.randint(0, 256), OP_RETURN])))
tx.rehash()
b2.vtx[0] = tx
b2.hashMerkleRoot = b2.calc_merkle_root()
b2.solve()
# Now we create the compact block and send it
comp_block = HeaderAndShortIDs()
comp_block.initialize_from_block(b2)
peer.send_and_ping(msg_cmpctblock(comp_block.to_p2p()))
# Check that compact block is received properly
assert (int(node.getbestblockhash(), 16) == b2.sha256)
