async def _setup_alice_and_bob_factories(
alice_headerdb=None, bob_headerdb=None,
alice_peer_class=HLSPeer, bob_peer_class=None):
if bob_peer_class is None:
bob_peer_class = alice_peer_class
cancel_token = CancelToken('helios.get_directly_linked_peers_without_handshake')
#
# Alice
#
if alice_headerdb is None:
alice_headerdb = get_fresh_mainnet_headerdb()
alice_context = ChainContext(
headerdb=alice_headerdb,
network_id=1,
vm_configuration=tuple(),
)
if alice_peer_class is HLSPeer:
alice_factory_class = HLSPeerFactory
elif alice_peer_class is LESPeer:
alice_factory_class = LESPeerFactory
else:
raise TypeError(f"Unknown peer class: {alice_peer_class}")
alice_factory = alice_factory_class(
privkey=ecies.generate_privkey(),
context=alice_context,
token=cancel_token,
)
#
# Bob
#
if bob_headerdb is None:
bob_headerdb = get_fresh_mainnet_headerdb()
bob_context = ChainContext(
headerdb=bob_headerdb,
network_id=1,
vm_configuration=tuple(),
)
if bob_peer_class is HLSPeer:
bob_factory_class = HLSPeerFactory
elif bob_peer_class is LESPeer:
bob_factory_class = LESPeerFactory
else:
raise TypeError(f"Unknown peer class: {bob_peer_class}")
bob_factory = bob_factory_class(
privkey=ecies.generate_privkey(),
context=bob_context,
token=cancel_token,
)
return alice_factory, bob_factory
def get_chain_context(base_db, privkey):
chain = FakeAsyncTestnetChain(base_db,
privkey.public_key.to_canonical_address(),
privkey)
chaindb = FakeAsyncChainDB(base_db)
chain_head_db = FakeAsyncChainHeadDB.load_from_saved_root_hash(base_db)
consensus_db = FakeAsyncConsensusDB(chaindb)
chain_config = ChainConfig(network_id=TESTNET_NETWORK_ID)
chain_config._node_private_helios_key = privkey
chain_config.num_chain_processes = 1
network_id = TESTNET_NETWORK_ID
vm_configuration = tuple()
chain_context = ChainContext(
base_db=base_db,
chains=[chain],
chaindb=chaindb,
chain_head_db=chain_head_db,
consensus_db=consensus_db,
chain_config=chain_config,
network_id=network_id,
vm_configuration=vm_configuration,
)
return chain_context
def _test() -> None:
import argparse
import asyncio
import signal
from hvm.chains.ropsten import RopstenChain, ROPSTEN_VM_CONFIGURATION
from hvm.db.backends.level import LevelDB
from hp2p import ecies
from hp2p.kademlia import Node
from helios.protocol.common.constants import DEFAULT_PREFERRED_NODES
from helios.protocol.common.context import ChainContext
from tests.helios.core.integration_test_helpers import (
FakeAsyncChainDB, FakeAsyncRopstenChain, connect_to_peers_loop)
logging.basicConfig(level=logging.INFO,
format='%(asctime)s %(levelname)s: %(message)s')
parser = argparse.ArgumentParser()
parser.add_argument('-db', type=str, required=True)
parser.add_argument('-enode',
type=str,
required=False,
help="The enode we should connect to")
args = parser.parse_args()
chaindb = FakeAsyncChainDB(LevelDB(args.db))
chain = FakeAsyncRopstenChain(chaindb)
network_id = RopstenChain.network_id
privkey = ecies.generate_privkey()
context = ChainContext(headerdb=chaindb,
network_id=network_id,
vm_configuration=ROPSTEN_VM_CONFIGURATION)
peer_pool = HLSPeerPool(privkey=privkey, context=context)
if args.enode:
nodes = tuple([Node.from_uri(args.enode)])
else:
nodes = DEFAULT_PREFERRED_NODES[network_id]
asyncio.ensure_future(peer_pool.run())
peer_pool.run_task(connect_to_peers_loop(peer_pool, nodes))
loop = asyncio.get_event_loop()
syncer = FullNodeSyncer(chain, chaindb, chaindb.db, peer_pool)
sigint_received = asyncio.Event()
for sig in [signal.SIGINT, signal.SIGTERM]:
loop.add_signal_handler(sig, sigint_received.set)
async def exit_on_sigint() -> None:
await sigint_received.wait()
await syncer.cancel()
await peer_pool.cancel()
loop.stop()
loop.set_debug(True)
asyncio.ensure_future(exit_on_sigint())
asyncio.ensure_future(syncer.run())
loop.run_forever()
loop.close()
def chain_context(self):
return ChainContext(
base_db=self.base_db,
chains=self.chains,
chaindb=self.chaindb,
chain_head_db=self.chain_head_db,
consensus_db=self.consensus_db,
chain_config=self.chain_config,
network_id=self.network_id,
vm_configuration=self.chains[0].get_vm_configuration(),
)
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/helios/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)
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(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())
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