async def test_tx_sending(request, event_loop):
# This test covers the communication end to end whereas the previous
# focusses on the rules of the transaction pool on when to send tx to whom
peer1, peer2 = await get_directly_linked_peers(
request,
event_loop,
peer1_class=ETHPeer,
peer2_class=ETHPeer,
)
peer2_subscriber = asyncio.Queue()
peer2.add_subscriber(peer2_subscriber)
pool = TxPool(MockPeerPoolWithConnectedPeers([peer1, peer2]))
asyncio.ensure_future(pool.run())
def finalizer():
event_loop.run_until_complete(pool.cancel())
request.addfinalizer(finalizer)
txs = [create_random_tx()]
peer1.sub_proto.send_transactions(txs)
# Ensure that peer2 gets the transactions
peer, cmd, msg = await asyncio.wait_for(
peer2_subscriber.get(),
timeout=0.1,
)
assert peer == peer2
assert isinstance(cmd, Transactions)
assert msg[0].hash == txs[0].hash
async def test_syncer_proposing(request, event_loop):
# setup a-b topology
peer_a_b, peer_b_a = await get_directly_linked_sharding_peers(
request, event_loop)
peer_a_b_subscriber = asyncio.Queue()
peer_a_b.add_subscriber(peer_a_b_subscriber)
peer_pool_b = MockPeerPoolWithConnectedPeers([peer_b_a])
# setup shard dbs at b
shard_db = ShardDB(MemoryDB())
shard = Shard(shard_db, 0)
# start shard syncer
syncer = ShardSyncer(shard, peer_pool_b)
asyncio.ensure_future(syncer.run())
def finalizer():
event_loop.run_until_complete(syncer.cancel())
request.addfinalizer(finalizer)
# propose at b and check that it announces its proposal
await syncer.propose()
peer, cmd, msg = await asyncio.wait_for(
peer_a_b_subscriber.get(),
timeout=1,
)
assert peer == peer_a_b
assert isinstance(cmd, NewCollationHashes)
assert len(msg["collation_hashes_and_periods"]) == 1
proposed_hash = msg["collation_hashes_and_periods"][0][0]
# test that the collation has been added to the shard
shard.get_collation_by_hash(proposed_hash)
async def test_tx_propagation(monkeypatch, request, event_loop):
peer1, peer2 = await get_directly_linked_peers(
request,
event_loop,
peer1_class=ETHPeer,
peer2_class=ETHPeer,
)
# We intercept sub_proto.send_transactions to record detailed information
# about which peer received what and was invoked how often.
peer1_txs_recorder = create_tx_recorder(monkeypatch, peer1)
peer2_txs_recorder = create_tx_recorder(monkeypatch, peer2)
pool = TxPool(MockPeerPoolWithConnectedPeers([peer1, peer2]))
asyncio.ensure_future(pool.run())
def finalizer():
event_loop.run_until_complete(pool.cancel())
request.addfinalizer(finalizer)
txs_broadcasted_by_peer1 = [create_random_tx()]
# Peer1 sends some txs
await pool._handle_tx(peer1, txs_broadcasted_by_peer1)
# Check that we don't send the txs back to peer1 where they came from
assert peer1_txs_recorder.send_count == 0
# Check that Peer2 receives them
assert len(peer2_txs_recorder.recorded_tx) == 1
assert peer2_txs_recorder.recorded_tx[0].hash == txs_broadcasted_by_peer1[
0].hash
# Peer1 sends same txs again
await pool._handle_tx(peer1, txs_broadcasted_by_peer1)
# Check that Peer2 doesn't receive them again
assert peer2_txs_recorder.send_count == 1
# Peer2 sends exact same txs back
await pool._handle_tx(peer2, txs_broadcasted_by_peer1)
# Check that Peer1 won't get them as that is where they originally came from
assert len(peer1_txs_recorder.recorded_tx) == 0
# Also ensure, we don't even call send_transactions with an empty tx list
assert peer1_txs_recorder.send_count == 0
# Peer2 sends old + new tx
txs_broadcasted_by_peer2 = [
create_random_tx(), txs_broadcasted_by_peer1[0]
]
await pool._handle_tx(peer2, txs_broadcasted_by_peer2)
# Check that Peer1 receives only the one tx that it didn't know about
assert len(peer1_txs_recorder.recorded_tx) == 1
assert peer1_txs_recorder.recorded_tx[0].hash == txs_broadcasted_by_peer2[
0].hash
assert peer1_txs_recorder.send_count == 1
async def test_syncer_requests_new_collations(request, event_loop):
# setup a-b topology
peer_a_b, peer_b_a = await get_directly_linked_sharding_peers(
request, event_loop)
peer_a_b_subscriber = asyncio.Queue()
peer_a_b.add_subscriber(peer_a_b_subscriber)
peer_pool_b = MockPeerPoolWithConnectedPeers([peer_b_a])
# setup shard dbs at b
shard_db = ShardDB(MemoryDB())
shard = Shard(shard_db, 0)
# start shard syncer
syncer = ShardSyncer(shard, peer_pool_b)
asyncio.ensure_future(syncer.run())
def finalizer():
event_loop.run_until_complete(syncer.cancel())
request.addfinalizer(finalizer)
# notify b about new hashes at a and check that it requests them
hashes_and_periods = ((b"\xaa" * 32, 0), )
peer_a_b.sub_proto.send_new_collation_hashes(hashes_and_periods)
peer, cmd, msg = await asyncio.wait_for(
peer_a_b_subscriber.get(),
timeout=1,
)
assert peer == peer_a_b
assert isinstance(cmd, GetCollations)
assert msg["collation_hashes"] == (hashes_and_periods[0][0], )
async def test_shard_syncer(connections, request, event_loop):
peers_by_server = {}
for server_id1, server_id2 in connections:
peer1, peer2 = await get_directly_linked_sharding_peers(
request, event_loop)
peers_by_server.setdefault(server_id1, []).append(peer1)
peers_by_server.setdefault(server_id2, []).append(peer2)
syncers = []
for _, peers in sorted(peers_by_server.items()):
peer_pool = MockPeerPoolWithConnectedPeers(peers)
shard_db = ShardDB(MemoryDB())
syncer = ShardSyncer(Shard(shard_db, 0), peer_pool)
syncers.append(syncer)
asyncio.ensure_future(syncer.run())
def finalizer():
event_loop.run_until_complete(
asyncio.gather(*[syncer.cancel() for syncer in syncers]))
request.addfinalizer(finalizer)
# let each node propose and check that collation appears at all other nodes
for proposer in syncers:
collation = proposer.propose()
await asyncio.wait_for(asyncio.gather(*[
syncer.collations_received_event.wait() for syncer in syncers
if syncer != proposer
]),
timeout=2)
for syncer in syncers:
assert syncer.shard.get_collation_by_hash(
collation.hash) == collation
async def bootstrap_test_setup(monkeypatch, request, event_loop, chain, tx_validator):
peer1, peer2 = await get_directly_linked_peers(
request,
event_loop,
peer1_class=ETHPeer,
peer2_class=ETHPeer,
)
# We intercept sub_proto.send_transactions to record detailed information
# about which peer received what and was invoked how often.
peer1_txs_recorder = create_tx_recorder(monkeypatch, peer1)
peer2_txs_recorder = create_tx_recorder(monkeypatch, peer2)
pool = TxPool(
MockPeerPoolWithConnectedPeers([peer1, peer2]),
tx_validator
)
asyncio.ensure_future(pool.run())
def finalizer():
event_loop.run_until_complete(pool.cancel())
request.addfinalizer(finalizer)
return peer1, peer1_txs_recorder, peer2, peer2_txs_recorder, pool
async def test_new_collations_notification(request, event_loop):
# setup a-b-c topology
peer_a_b, peer_b_a = await get_directly_linked_sharding_peers(
request, event_loop)
peer_b_c, peer_c_b = await get_directly_linked_sharding_peers(
request, event_loop)
peer_c_b_subscriber = asyncio.Queue()
peer_c_b.add_subscriber(peer_c_b_subscriber)
peer_pool_b = MockPeerPoolWithConnectedPeers([peer_b_a, peer_b_c])
# setup shard dbs at b
shard_db = ShardDB(MemoryDB())
shard = Shard(shard_db, 0)
# start shard syncer
syncer = ShardSyncer(shard, peer_pool_b)
asyncio.ensure_future(syncer.run())
def finalizer():
event_loop.run_until_complete(syncer.cancel())
request.addfinalizer(finalizer)
# send collation from a to b and check that c gets notified
c1 = next(collations)
peer_a_b.sub_proto.send_collations(0, [c1])
peer, cmd, msg = await asyncio.wait_for(
peer_c_b_subscriber.get(),
timeout=1,
)
assert peer == peer_c_b
assert isinstance(cmd, NewCollationHashes)
assert msg["collation_hashes_and_periods"] == ((c1.hash, c1.period), )
# check that c won't be notified about c1 again
c2 = next(collations)
peer_a_b.sub_proto.send_collations(0, [c1, c2])
peer, cmd, msg = await asyncio.wait_for(
peer_c_b_subscriber.get(),
timeout=1,
)
assert peer == peer_c_b
assert isinstance(cmd, NewCollationHashes)
assert msg["collation_hashes_and_periods"] == ((c2.hash, c2.period), )
async def test_collation_requests(request, event_loop):
# setup two peers
sender, receiver = await get_directly_linked_sharding_peers(
request, event_loop)
receiver_peer_pool = MockPeerPoolWithConnectedPeers([receiver])
# setup shard db for request receiving node
receiver_db = ShardDB(MemoryDB())
receiver_shard = Shard(receiver_db, 0)
# create three collations and add two to the shard of the receiver
# body is shared to avoid unnecessary chunk root calculation
body = zpad_right(b"body", COLLATION_SIZE)
chunk_root = calc_chunk_root(body)
c1 = Collation(
CollationHeader(0, chunk_root, 0, zpad_right(b"proposer1", 20)), body)
c2 = Collation(
CollationHeader(0, chunk_root, 1, zpad_right(b"proposer2", 20)), body)
c3 = Collation(
CollationHeader(0, chunk_root, 2, zpad_right(b"proposer3", 20)), body)
for collation in [c1, c2]:
receiver_shard.add_collation(collation)
# start shard syncer
receiver_syncer = ShardSyncer(receiver_shard, receiver_peer_pool)
asyncio.ensure_future(receiver_syncer.run())
def finalizer():
event_loop.run_until_complete(receiver_syncer.cancel())
request.addfinalizer(finalizer)
cancel_token = CancelToken("test")
# request single collation
received_collations = await asyncio.wait_for(
sender.get_collations([c1.hash], cancel_token),
timeout=1,
)
assert received_collations == set([c1])
# request multiple collations
received_collations = await asyncio.wait_for(
sender.get_collations([c1.hash, c2.hash], cancel_token),
timeout=1,
)
assert received_collations == set([c1, c2])
# request no collations
received_collations = await asyncio.wait_for(
sender.get_collations([], cancel_token),
timeout=1,
)
assert received_collations == set()
# request unknown collation
received_collations = await asyncio.wait_for(
sender.get_collations([c3.hash], cancel_token),
timeout=1,
)
assert received_collations == set()
# request multiple collations, including unknown one
received_collations = await asyncio.wait_for(
sender.get_collations([c1.hash, c2.hash, c3.hash], cancel_token),
timeout=1,
)
assert received_collations == set([c1, c2])