async def process_sub_proto_handshake(self, cmd: Command,
msg: _DecodedMsgType) -> None:
if not isinstance(cmd, Status):
await self.disconnect(DisconnectReason.subprotocol_error)
raise HandshakeFailure(
f"Expected a ETH Status msg, got {cmd}, disconnecting")
msg = cast(Dict[str, Any], msg)
self.head_td = msg['td']
self.head_hash = msg['best_hash']
self.network_id = msg['network_id']
self.genesis_hash = msg['genesis_hash']
if msg['network_id'] != self.local_network_id:
await self.disconnect(DisconnectReason.useless_peer)
raise WrongNetworkFailure(
f"{self} network ({msg['network_id']}) does not match ours "
f"({self.local_network_id}), disconnecting")
local_genesis_hash = await self._get_local_genesis_hash()
if msg['genesis_hash'] != local_genesis_hash:
await self.disconnect(DisconnectReason.useless_peer)
raise WrongGenesisFailure(
f"{self} genesis ({encode_hex(msg['genesis_hash'])}) does not "
f"match ours ({local_genesis_hash}), disconnecting")
async def process_sub_proto_handshake(self, cmd: CommandAPI,
msg: Payload) -> None:
if not isinstance(cmd, (Status, StatusV2)):
await self.disconnect(DisconnectReason.subprotocol_error)
raise HandshakeFailure(
f"Expected a LES Status msg, got {cmd}, disconnecting")
msg = cast(Dict[str, Any], msg)
self.head_td = msg['headTd']
self.head_hash = msg['headHash']
self.head_number = msg['headNum']
self.network_id = msg['networkId']
self.genesis_hash = msg['genesisHash']
if msg['networkId'] != self.local_network_id:
await self.disconnect(DisconnectReason.useless_peer)
raise WrongNetworkFailure(
f"{self} network ({msg['networkId']}) does not match ours "
f"({self.local_network_id}), disconnecting")
local_genesis_hash = await self._get_local_genesis_hash()
if msg['genesisHash'] != local_genesis_hash:
await self.disconnect(DisconnectReason.useless_peer)
raise WrongGenesisFailure(
f"{self} genesis ({encode_hex(msg['genesisHash'])}) does not "
f"match ours ({local_genesis_hash}), disconnecting")
# Eventually we might want to keep connections to peers where we are the only side serving
# data, but right now both our chain syncer and the Peer.boot() method expect the remote
# to reply to header requests, so if they don't we simply disconnect here.
if 'serveHeaders' not in msg:
await self.disconnect(DisconnectReason.useless_peer)
raise HandshakeFailure(
f"{self} doesn't serve headers, disconnecting")
def validate_base_receipt(
remote: NodeAPI, receipt: Union[ETHV63HandshakeReceipt,
ETHHandshakeReceipt],
handshake_params: Union[StatusV63Payload, StatusPayload]) -> None:
if receipt.handshake_params.network_id != handshake_params.network_id:
raise WrongNetworkFailure(
f"{remote} network "
f"({receipt.handshake_params.network_id}) does not match ours "
f"({handshake_params.network_id}), disconnecting")
if receipt.handshake_params.genesis_hash != handshake_params.genesis_hash:
raise WrongGenesisFailure(
f"{remote} genesis "
f"({encode_hex(receipt.handshake_params.genesis_hash)}) does "
f"not match ours ({encode_hex(handshake_params.genesis_hash)}), "
f"disconnecting")
async def do_handshake(
self, multiplexer: MultiplexerAPI,
protocol: Union[LESProtocolV1,
LESProtocolV2]) -> LESHandshakeReceipt:
"""Perform the handshake for the sub-protocol agreed with the remote peer.
Raises HandshakeFailure if the handshake is not successful.
"""
protocol.send(protocol.status_command_type(self.handshake_params))
async for cmd in multiplexer.stream_protocol_messages(protocol):
if not isinstance(cmd, (StatusV1, StatusV2)):
raise HandshakeFailure(
f"Expected a LES Status msg, got {cmd}, disconnecting")
if cmd.payload.network_id != self.handshake_params.network_id:
raise WrongNetworkFailure(
f"{multiplexer.remote} network "
f"({cmd.payload.network_id}) does not match ours "
f"({self.handshake_params.network_id}), disconnecting")
if cmd.payload.genesis_hash != self.handshake_params.genesis_hash:
raise WrongGenesisFailure(
f"{multiplexer.remote} genesis "
f"({encode_hex(cmd.payload.genesis_hash)}) does "
f"not match ours "
f"({encode_hex(self.handshake_params.genesis_hash)}), "
f"disconnecting")
# Eventually we might want to keep connections to peers where we
# are the only side serving data, but right now both our chain
# syncer and the Peer.boot() method expect the remote to reply to
# header requests, so if they don't we simply disconnect here.
if cmd.payload.serve_headers is False:
raise HandshakeFailure(
f"{multiplexer.remote} doesn't serve headers, disconnecting"
)
receipt = LESHandshakeReceipt(protocol, cmd.payload)
break
else:
raise HandshakeFailure(
"Message stream exited before finishing handshake")
return receipt
async def do_handshake(self,
multiplexer: MultiplexerAPI,
protocol: ProtocolAPI) -> ETHHandshakeReceipt:
"""Perform the handshake for the sub-protocol agreed with the remote peer.
Raises HandshakeFailure if the handshake is not successful.
"""
protocol = cast(ETHProtocol, protocol)
protocol.send_handshake(self.handshake_params)
async for cmd, msg in multiplexer.stream_protocol_messages(protocol):
if not isinstance(cmd, Status):
raise HandshakeFailure(f"Expected a ETH Status msg, got {cmd}, disconnecting")
msg = cast(Dict[str, Any], msg)
remote_params = ETHHandshakeParams(
version=msg['protocol_version'],
network_id=msg['network_id'],
total_difficulty=msg['td'],
head_hash=msg['best_hash'],
genesis_hash=msg['genesis_hash'],
)
receipt = ETHHandshakeReceipt(protocol, remote_params)
if receipt.handshake_params.network_id != self.handshake_params.network_id:
raise WrongNetworkFailure(
f"{multiplexer.remote} network "
f"({receipt.handshake_params.network_id}) does not match ours "
f"({self.handshake_params.network_id}), disconnecting"
)
if receipt.handshake_params.genesis_hash != self.handshake_params.genesis_hash:
raise WrongGenesisFailure(
f"{multiplexer.remote} genesis "
f"({encode_hex(receipt.handshake_params.genesis_hash)}) does "
f"not match ours ({encode_hex(self.handshake_params.genesis_hash)}), "
f"disconnecting"
)
break
else:
raise HandshakeFailure("Message stream exited before finishing handshake")
return receipt
async def do_handshake(self,
multiplexer: MultiplexerAPI,
protocol: ProtocolAPI) -> LESHandshakeReceipt:
"""Perform the handshake for the sub-protocol agreed with the remote peer.
Raises HandshakeFailure if the handshake is not successful.
"""
protocol = cast(AnyLESProtocol, protocol)
protocol.send_handshake(self.handshake_params)
async for cmd, msg in multiplexer.stream_protocol_messages(protocol):
if not isinstance(cmd, (Status, StatusV2)):
raise HandshakeFailure(f"Expected a LES Status msg, got {cmd}, disconnecting")
msg = cast(Dict[str, Any], msg)
remote_params = LESHandshakeParams(
version=msg['protocolVersion'],
network_id=msg['networkId'],
head_td=msg['headTd'],
head_hash=msg['headHash'],
head_num=msg['headNum'],
genesis_hash=msg['genesisHash'],
serve_headers=('serveHeaders' in msg),
serve_chain_since=msg.get('serveChainSince'),
serve_state_since=msg.get('serveStateSince'),
serve_recent_chain=msg.get('serveRecentChain'),
serve_recent_state=msg.get('serveRecentState'),
tx_relay=('txRelay' in msg),
flow_control_bl=msg.get('flowControl/BL'),
flow_control_mcr=msg.get('flowControl/MRC'),
flow_control_mrr=msg.get('flowControl/MRR'),
announce_type=msg.get('announceType'), # TODO: only in StatusV2
)
if remote_params.network_id != self.handshake_params.network_id:
raise WrongNetworkFailure(
f"{multiplexer.remote} network "
f"({remote_params.network_id}) does not match ours "
f"({self.handshake_params.network_id}), disconnecting"
)
if remote_params.genesis_hash != self.handshake_params.genesis_hash:
raise WrongGenesisFailure(
f"{multiplexer.remote} genesis "
f"({encode_hex(remote_params.genesis_hash)}) does "
f"not match ours "
f"({encode_hex(self.handshake_params.genesis_hash)}), "
f"disconnecting"
)
# Eventually we might want to keep connections to peers where we
# are the only side serving data, but right now both our chain
# syncer and the Peer.boot() method expect the remote to reply to
# header requests, so if they don't we simply disconnect here.
if remote_params.serve_headers is False:
raise HandshakeFailure(f"{multiplexer.remote} doesn't serve headers, disconnecting")
receipt = LESHandshakeReceipt(protocol, remote_params)
break
else:
raise HandshakeFailure("Message stream exited before finishing handshake")
return receipt
