async def test_light_syncer(request, event_loop, chaindb_fresh, chaindb_20):
client_peer, server_peer = await get_directly_linked_peers(
request,
event_loop,
alice_peer_class=LESPeer,
alice_headerdb=FakeAsyncHeaderDB(chaindb_fresh.db),
bob_headerdb=FakeAsyncHeaderDB(chaindb_20.db))
client = LightChainSyncer(ByzantiumTestChain(chaindb_fresh.db),
chaindb_fresh,
MockPeerPoolWithConnectedPeers([client_peer]))
server_peer_pool = MockPeerPoolWithConnectedPeers([server_peer])
server_request_handler = LightRequestServer(
FakeAsyncHeaderDB(chaindb_20.db), server_peer_pool)
asyncio.ensure_future(server_request_handler.run())
server_peer.logger.info("%s is serving 20 blocks", server_peer)
client_peer.logger.info("%s is syncing up 20", client_peer)
def finalizer():
event_loop.run_until_complete(client.cancel())
# Yield control so that client/server.run() returns, otherwise asyncio will complain.
event_loop.run_until_complete(asyncio.sleep(0.1))
request.addfinalizer(finalizer)
asyncio.ensure_future(client.run())
await wait_for_head(chaindb_fresh, chaindb_20.get_canonical_head())
async def test_lightchain_integration(request, event_loop, caplog,
geth_ipc_path, enode, geth_process):
"""Test LightChainSyncer/LightPeerChain against a running geth instance.
In order to run this manually, you can use `tox -e py36-lightchain_integration` or:
pytest --integration --capture=no tests/integration/test_lightchain_integration.py
The fixture for this test was generated with:
geth --testnet --syncmode full
It only needs the first 11 blocks for this test to succeed.
"""
if not pytest.config.getoption("--integration"):
pytest.skip("Not asked to run integration tests")
# will almost certainly want verbose logging in a failure
caplog.set_level(logging.DEBUG)
# make sure geth has been launched
wait_for_socket(geth_ipc_path)
remote = Node.from_uri(enode)
base_db = AtomicDB()
chaindb = FakeAsyncChainDB(base_db)
chaindb.persist_header(ROPSTEN_GENESIS_HEADER)
headerdb = FakeAsyncHeaderDB(base_db)
context = ChainContext(
headerdb=headerdb,
network_id=ROPSTEN_NETWORK_ID,
vm_configuration=ROPSTEN_VM_CONFIGURATION,
)
peer_pool = LESPeerPool(
privkey=ecies.generate_privkey(),
context=context,
)
chain = FakeAsyncRopstenChain(base_db)
syncer = LightChainSyncer(chain, chaindb, peer_pool)
syncer.min_peers_to_sync = 1
peer_chain = LightPeerChain(headerdb, peer_pool)
server_request_handler = LightRequestServer(headerdb, peer_pool)
asyncio.ensure_future(peer_pool.run())
asyncio.ensure_future(connect_to_peers_loop(peer_pool, tuple([remote])))
asyncio.ensure_future(peer_chain.run())
asyncio.ensure_future(server_request_handler.run())
asyncio.ensure_future(syncer.run())
await asyncio.sleep(
0) # Yield control to give the LightChainSyncer a chance to start
def finalizer():
event_loop.run_until_complete(peer_pool.cancel())
event_loop.run_until_complete(peer_chain.cancel())
event_loop.run_until_complete(syncer.cancel())
event_loop.run_until_complete(server_request_handler.cancel())
request.addfinalizer(finalizer)
n = 11
# Wait for the chain to sync a few headers.
async def wait_for_header_sync(block_number):
while headerdb.get_canonical_head().block_number < block_number:
await asyncio.sleep(0.1)
await asyncio.wait_for(wait_for_header_sync(n), 5)
# https://ropsten.etherscan.io/block/11
header = headerdb.get_canonical_block_header_by_number(n)
body = await peer_chain.coro_get_block_body_by_hash(header.hash)
assert len(body['transactions']) == 15
receipts = await peer_chain.coro_get_receipts(header.hash)
assert len(receipts) == 15
assert encode_hex(keccak(rlp.encode(receipts[0]))) == (
'0xf709ed2c57efc18a1675e8c740f3294c9e2cb36ba7bb3b89d3ab4c8fef9d8860')
assert len(peer_pool) == 1
peer = peer_pool.highest_td_peer
head = await peer_chain.coro_get_block_header_by_hash(peer.head_hash)
# In order to answer queries for contract code, geth needs the state trie entry for the block
# we specify in the query, but because of fast sync we can only assume it has that for recent
# blocks, so we use the current head to lookup the code for the contract below.
# https://ropsten.etherscan.io/address/0x95a48dca999c89e4e284930d9b9af973a7481287
contract_addr = decode_hex('0x8B09D9ac6A4F7778fCb22852e879C7F3B2bEeF81')
contract_code = await peer_chain.coro_get_contract_code(
head.hash, contract_addr)
assert encode_hex(contract_code) == '0x600060006000600060006000356000f1'
account = await peer_chain.coro_get_account(head.hash, contract_addr)
assert account.code_hash == keccak(contract_code)
assert account.balance == 0