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Add automatic docstring formatter and apply

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This commit is contained in:
Dominik Muhs 2019-10-24 08:41:10 +02:00
parent 30aeb35122
commit eef505f2d9
74 changed files with 565 additions and 760 deletions
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1
Makefile
View File

@ -9,6 +9,7 @@ all: protobufs
format:
black $(FILES_TO_LINT)
isort --recursive $(FILES_TO_LINT)
docformatter -ir $(FILES_TO_LINT)
lintroll:
mypy -p libp2p -p examples --config-file mypy.ini

16
libp2p/__init__.py
View File

@ -25,9 +25,7 @@ from libp2p.typing import TProtocol
async def cleanup_done_tasks() -> None:
"""
clean up asyncio done tasks to free up resources
"""
"""clean up asyncio done tasks to free up resources."""
while True:
for task in asyncio.all_tasks():
if task.done():
@ -50,8 +48,8 @@ def generate_peer_id_from(key_pair: KeyPair) -> ID:
def initialize_default_kademlia_router(
ksize: int = 20, alpha: int = 3, id_opt: ID = None, storage: IStorage = None
) -> KadmeliaPeerRouter:
"""
initialize kadmelia router when no kademlia router is passed in
"""initialize kadmelia router when no kademlia router is passed in.
:param ksize: The k parameter from the paper
:param alpha: The alpha parameter from the paper
:param id_opt: optional id for host
@ -80,8 +78,8 @@ def initialize_default_swarm(
peerstore_opt: IPeerStore = None,
disc_opt: IPeerRouting = None,
) -> Swarm:
"""
initialize swarm when no swarm is passed in
"""initialize swarm when no swarm is passed in.
:param id_opt: optional id for host
:param transport_opt: optional choice of transport upgrade
:param muxer_opt: optional choice of stream muxer
@ -120,8 +118,8 @@ async def new_node(
peerstore_opt: IPeerStore = None,
disc_opt: IPeerRouting = None,
) -> IHost:
"""
create new libp2p node
"""create new libp2p node.
:param key_pair: key pair for deriving an identity
:param swarm_opt: optional swarm
:param id_opt: optional id for host

9
libp2p/crypto/authenticated_encryption.py
View File

@ -61,12 +61,9 @@ class MacAndCipher:
def initialize_pair(
cipher_type: str, hash_type: str, secret: bytes
) -> Tuple[EncryptionParameters, EncryptionParameters]:
"""
Return a pair of ``Keys`` for use in securing a
communications channel with authenticated encryption
derived from the ``secret`` and using the
requested ``cipher_type`` and ``hash_type``.
"""
"""Return a pair of ``Keys`` for use in securing a communications channel
with authenticated encryption derived from the ``secret`` and using the
requested ``cipher_type`` and ``hash_type``."""
if cipher_type != "AES-128":
raise NotImplementedError()
if hash_type != "SHA256":

11
libp2p/crypto/ecc.py
View File

@ -6,10 +6,8 @@ from libp2p.crypto.keys import KeyPair, KeyType, PrivateKey, PublicKey
def infer_local_type(curve: str) -> curve_types.Curve:
"""
converts a ``str`` representation of some elliptic curve to
a representation understood by the backend of this module.
"""
"""converts a ``str`` representation of some elliptic curve to a
representation understood by the backend of this module."""
if curve == "P-256":
return curve_types.P256
else:
@ -63,9 +61,8 @@ class ECCPrivateKey(PrivateKey):
def create_new_key_pair(curve: str) -> KeyPair:
"""
Return a new ECC keypair with the requested ``curve`` type, e.g. "P-256".
"""
"""Return a new ECC keypair with the requested ``curve`` type, e.g.
"P-256"."""
private_key = ECCPrivateKey.new(curve)
public_key = private_key.get_public_key()
return KeyPair(private_key, public_key)

6
libp2p/crypto/exceptions.py
View File

@ -6,9 +6,7 @@ class CryptographyError(BaseLibp2pError):
class MissingDeserializerError(CryptographyError):
"""
Raise if the requested deserialization routine is missing for
some type of cryptographic key.
"""
"""Raise if the requested deserialization routine is missing for some type
of cryptographic key."""
pass

4
libp2p/crypto/key_exchange.py
View File

@ -9,9 +9,7 @@ SharedKeyGenerator = Callable[[bytes], bytes]
def create_ephemeral_key_pair(curve_type: str) -> Tuple[PublicKey, SharedKeyGenerator]:
"""
Facilitates ECDH key exchange.
"""
"""Facilitates ECDH key exchange."""
if curve_type != "P-256":
raise NotImplementedError()

41
libp2p/crypto/keys.py
View File

@ -15,22 +15,16 @@ class KeyType(Enum):
class Key(ABC):
"""
A ``Key`` represents a cryptographic key.
"""
"""A ``Key`` represents a cryptographic key."""
@abstractmethod
def to_bytes(self) -> bytes:
"""
Returns the byte representation of this key.
"""
"""Returns the byte representation of this key."""
...
@abstractmethod
def get_type(self) -> KeyType:
"""
Returns the ``KeyType`` for ``self``.
"""
"""Returns the ``KeyType`` for ``self``."""
...
def __eq__(self, other: object) -> bool:
@ -40,30 +34,23 @@ class Key(ABC):
class PublicKey(Key):
"""
A ``PublicKey`` represents a cryptographic public key.
"""
"""A ``PublicKey`` represents a cryptographic public key."""
@abstractmethod
def verify(self, data: bytes, signature: bytes) -> bool:
"""
Verify that ``signature`` is the cryptographic signature of the hash of ``data``.
"""
"""Verify that ``signature`` is the cryptographic signature of the hash
of ``data``."""
...
def _serialize_to_protobuf(self) -> protobuf.PublicKey:
"""
Return the protobuf representation of this ``Key``.
"""
"""Return the protobuf representation of this ``Key``."""
key_type = self.get_type().value
data = self.to_bytes()
protobuf_key = protobuf.PublicKey(key_type=key_type, data=data)
return protobuf_key
def serialize(self) -> bytes:
"""
Return the canonical serialization of this ``Key``.
"""
"""Return the canonical serialization of this ``Key``."""
return self._serialize_to_protobuf().SerializeToString()
@classmethod
@ -72,9 +59,7 @@ class PublicKey(Key):
class PrivateKey(Key):
"""
A ``PrivateKey`` represents a cryptographic private key.
"""
"""A ``PrivateKey`` represents a cryptographic private key."""
@abstractmethod
def sign(self, data: bytes) -> bytes:
@ -85,18 +70,14 @@ class PrivateKey(Key):
...
def _serialize_to_protobuf(self) -> protobuf.PrivateKey:
"""
Return the protobuf representation of this ``Key``.
"""
"""Return the protobuf representation of this ``Key``."""
key_type = self.get_type().value
data = self.to_bytes()
protobuf_key = protobuf.PrivateKey(key_type=key_type, data=data)
return protobuf_key
def serialize(self) -> bytes:
"""
Return the canonical serialization of this ``Key``.
"""
"""Return the canonical serialization of this ``Key``."""
return self._serialize_to_protobuf().SerializeToString()
@classmethod

7
libp2p/crypto/rsa.py
View File

@ -56,9 +56,10 @@ class RSAPrivateKey(PrivateKey):
def create_new_key_pair(bits: int = 2048, e: int = 65537) -> KeyPair:
"""
Returns a new RSA keypair with the requested key size (``bits``) and the given public
exponent ``e``. Sane defaults are provided for both values.
"""Returns a new RSA keypair with the requested key size (``bits``) and the
given public exponent ``e``.
Sane defaults are provided for both values.
"""
private_key = RSAPrivateKey.new(bits, e)
public_key = private_key.get_public_key()

6
libp2p/crypto/secp256k1.py
View File

@ -61,9 +61,9 @@ class Secp256k1PrivateKey(PrivateKey):
def create_new_key_pair(secret: bytes = None) -> KeyPair:
"""
Returns a new Secp256k1 keypair derived from the provided ``secret``,
a sequence of bytes corresponding to some integer between 0 and the group order.
"""Returns a new Secp256k1 keypair derived from the provided ``secret``, a
sequence of bytes corresponding to some integer between 0 and the group
order.
A valid secret is created if ``None`` is passed.
"""

4
libp2p/exceptions.py
View File

@ -3,9 +3,7 @@ class BaseLibp2pError(Exception):
class ValidationError(BaseLibp2pError):
"""
Raised when something does not pass a validation check.
"""
"""Raised when something does not pass a validation check."""
class ParseError(BaseLibp2pError):

21
libp2p/host/basic_host.py
View File

@ -27,9 +27,10 @@ logger = logging.getLogger("libp2p.network.basic_host")
class BasicHost(IHost):
"""
BasicHost is a wrapper of a `INetwork` implementation. It performs protocol negotiation
on a stream with multistream-select right after a stream is initialized.
"""BasicHost is a wrapper of a `INetwork` implementation.
It performs protocol negotiation on a stream with multistream-select
right after a stream is initialized.
"""
_network: INetwork
@ -86,8 +87,8 @@ class BasicHost(IHost):
def set_stream_handler(
self, protocol_id: TProtocol, stream_handler: StreamHandlerFn
) -> None:
"""
set stream handler for given `protocol_id`
"""set stream handler for given `protocol_id`
:param protocol_id: protocol id used on stream
:param stream_handler: a stream handler function
"""
@ -118,11 +119,11 @@ class BasicHost(IHost):
return net_stream
async def connect(self, peer_info: PeerInfo) -> None:
"""
connect ensures there is a connection between this host and the peer with
given `peer_info.peer_id`. connect will absorb the addresses in peer_info into its internal
peerstore. If there is not an active connection, connect will issue a
dial, and block until a connection is opened, or an error is returned.
"""connect ensures there is a connection between this host and the peer
with given `peer_info.peer_id`. connect will absorb the addresses in
peer_info into its internal peerstore. If there is not an active
connection, connect will issue a dial, and block until a connection is
opened, or an error is returned.
:param peer_info: peer_info of the peer we want to connect to
:type peer_info: peer.peerinfo.PeerInfo

4
libp2p/host/exceptions.py
View File

@ -2,9 +2,7 @@ from libp2p.exceptions import BaseLibp2pError
class HostException(BaseLibp2pError):
"""
A generic exception in `IHost`.
"""
"""A generic exception in `IHost`."""
class ConnectionFailure(HostException):

14
libp2p/host/host_interface.py
View File

@ -40,8 +40,8 @@ class IHost(ABC):
def set_stream_handler(
self, protocol_id: TProtocol, stream_handler: StreamHandlerFn
) -> None:
"""
set stream handler for host
"""set stream handler for host.
:param protocol_id: protocol id used on stream
:param stream_handler: a stream handler function
"""
@ -60,11 +60,11 @@ class IHost(ABC):
@abstractmethod
async def connect(self, peer_info: PeerInfo) -> None:
"""
connect ensures there is a connection between this host and the peer with
given peer_info.peer_id. connect will absorb the addresses in peer_info into its internal
peerstore. If there is not an active connection, connect will issue a
dial, and block until a connection is opened, or an error is returned.
"""connect ensures there is a connection between this host and the peer
with given peer_info.peer_id. connect will absorb the addresses in
peer_info into its internal peerstore. If there is not an active
connection, connect will issue a dial, and block until a connection is
opened, or an error is returned.
:param peer_info: peer_info of the peer we want to connect to
:type peer_info: peer.peerinfo.PeerInfo

6
libp2p/host/routed_host.py
View File

@ -15,9 +15,9 @@ class RoutedHost(BasicHost):
self._router = router
async def connect(self, peer_info: PeerInfo) -> None:
"""
connect ensures there is a connection between this host and the peer with
given `peer_info.peer_id`. See (basic_host).connect for more information.
"""connect ensures there is a connection between this host and the peer
with given `peer_info.peer_id`. See (basic_host).connect for more
information.
RoutedHost's Connect differs in that if the host has no addresses for a
given peer, it will use its routing system to try to find some.

4
libp2p/io/exceptions.py
View File

@ -6,9 +6,7 @@ class IOException(BaseLibp2pError):
class IncompleteReadError(IOException):
"""
Fewer bytes were read than requested.
"""
"""Fewer bytes were read than requested."""
class MsgioException(IOException):

3
libp2p/io/msgio.py
View File

@ -1,5 +1,4 @@
"""
``msgio`` is an implementation of `https://github.com/libp2p/go-msgio`.
"""``msgio`` is an implementation of `https://github.com/libp2p/go-msgio`.
from that repo: "a simple package to r/w length-delimited slices."

6
libp2p/kademlia/__init__.py
View File

@ -1,5 +1,3 @@
"""
Kademlia is a Python implementation of the Kademlia protocol which
utilizes the asyncio library.
"""
"""Kademlia is a Python implementation of the Kademlia protocol which utilizes
the asyncio library."""
__version__ = "2.0"

49
libp2p/kademlia/crawling.py
View File

@ -8,13 +8,10 @@ log = logging.getLogger(__name__)
class SpiderCrawl:
"""
Crawl the network and look for given 160-bit keys.
"""
"""Crawl the network and look for given 160-bit keys."""
def __init__(self, protocol, node, peers, ksize, alpha):
"""
Create a new C{SpiderCrawl}er.
"""Create a new C{SpiderCrawl}er.
Args:
protocol: A :class:`~kademlia.protocol.KademliaProtocol` instance.
@ -35,8 +32,7 @@ class SpiderCrawl:
self.nearest.push(peers)
async def _find(self, rpcmethod):
"""
Get either a value or list of nodes.
"""Get either a value or list of nodes.
Args:
rpcmethod: The protocol's callfindValue or call_find_node.
@ -75,15 +71,11 @@ class ValueSpiderCrawl(SpiderCrawl):
self.nearest_without_value = KadPeerHeap(self.node, 1)
async def find(self):
"""
Find either the closest nodes or the value requested.
"""
"""Find either the closest nodes or the value requested."""
return await self._find(self.protocol.call_find_value)
async def _nodes_found(self, responses):
"""
Handle the result of an iteration in _find.
"""
"""Handle the result of an iteration in _find."""
toremove = []
found_values = []
for peerid, response in responses.items():
@ -106,11 +98,11 @@ class ValueSpiderCrawl(SpiderCrawl):
return await self.find()
async def _handle_found_values(self, values):
"""
We got some values! Exciting. But let's make sure
they're all the same or freak out a little bit. Also,
make sure we tell the nearest node that *didn't* have
the value to store it.
"""We got some values!
Exciting. But let's make sure they're all the same or freak out
a little bit. Also, make sure we tell the nearest node that
*didn't* have the value to store it.
"""
value_counts = Counter(values)
if len(value_counts) != 1:
@ -127,15 +119,11 @@ class ValueSpiderCrawl(SpiderCrawl):
class NodeSpiderCrawl(SpiderCrawl):
async def find(self):
"""
Find the closest nodes.
"""
"""Find the closest nodes."""
return await self._find(self.protocol.call_find_node)
async def _nodes_found(self, responses):
"""
Handle the result of an iteration in _find.
"""
"""Handle the result of an iteration in _find."""
toremove = []
for peerid, response in responses.items():
response = RPCFindResponse(response)
@ -152,8 +140,7 @@ class NodeSpiderCrawl(SpiderCrawl):
class RPCFindResponse:
def __init__(self, response):
"""
A wrapper for the result of a RPC find.
"""A wrapper for the result of a RPC find.
Args:
response: This will be a tuple of (<response received>, <value>)
@ -163,9 +150,7 @@ class RPCFindResponse:
self.response = response
def happened(self):
"""
Did the other host actually respond?
"""
"""Did the other host actually respond?"""
return self.response[0]
def has_value(self):
@ -175,9 +160,9 @@ class RPCFindResponse:
return self.response[1]["value"]
def get_node_list(self):
"""
Get the node list in the response. If there's no value, this should
be set.
"""Get the node list in the response.
If there's no value, this should be set.
"""
nodelist = self.response[1] or []
return [create_kad_peerinfo(*nodeple) for nodeple in nodelist]

27
libp2p/kademlia/kad_peerinfo.py
View File

@ -30,9 +30,7 @@ class KadPeerInfo(PeerInfo):
return sorted(self.addrs) == sorted(node.addrs)
def distance_to(self, node):
"""
Get the distance between this node and another.
"""
"""Get the distance between this node and another."""
return self.xor_id ^ node.xor_id
def __iter__(self):
@ -56,13 +54,10 @@ class KadPeerInfo(PeerInfo):
class KadPeerHeap:
"""
A heap of peers ordered by distance to a given node.
"""
"""A heap of peers ordered by distance to a given node."""
def __init__(self, node, maxsize):
"""
Constructor.
"""Constructor.
@param node: The node to measure all distnaces from.
@param maxsize: The maximum size that this heap can grow to.
@ -73,12 +68,13 @@ class KadPeerHeap:
self.maxsize = maxsize
def remove(self, peers):
"""
Remove a list of peer ids from this heap. Note that while this
heap retains a constant visible size (based on the iterator), it's
actual size may be quite a bit larger than what's exposed. Therefore,
removal of nodes may not change the visible size as previously added
nodes suddenly become visible.
"""Remove a list of peer ids from this heap.
Note that while this heap retains a constant visible size (based
on the iterator), it's actual size may be quite a bit larger
than what's exposed. Therefore, removal of nodes may not change
the visible size as previously added nodes suddenly become
visible.
"""
peers = set(peers)
if not peers:
@ -108,8 +104,7 @@ class KadPeerHeap:
return heapq.heappop(self.heap)[1] if self else None
def push(self, nodes):
"""
Push nodes onto heap.
"""Push nodes onto heap.
@param nodes: This can be a single item or a C{list}.
"""

73
libp2p/kademlia/network.py
View File

@ -1,6 +1,4 @@
"""
Package for interacting on the network at a high level.
"""
"""Package for interacting on the network at a high level."""
import asyncio
import logging
import pickle
@ -15,16 +13,17 @@ log = logging.getLogger(__name__)
class KademliaServer:
"""
High level view of a node instance. This is the object that should be
created to start listening as an active node on the network.
"""High level view of a node instance.
This is the object that should be created to start listening as an
active node on the network.
"""
protocol_class = KademliaProtocol
def __init__(self, ksize=20, alpha=3, node_id=None, storage=None):
"""
Create a server instance. This will start listening on the given port.
"""Create a server instance. This will start listening on the given
port.
Args:
ksize (int): The k parameter from the paper
@ -56,8 +55,7 @@ class KademliaServer:
return self.protocol_class(self.node, self.storage, self.ksize)
async def listen(self, port, interface="0.0.0.0"):
"""
Start listening on the given port.
"""Start listening on the given port.
Provide interface="::" to accept ipv6 address
"""
@ -77,10 +75,8 @@ class KademliaServer:
self.refresh_loop = loop.call_later(3600, self.refresh_table)
async def _refresh_table(self):
"""
Refresh buckets that haven't had any lookups in the last hour
(per section 2.3 of the paper).
"""
"""Refresh buckets that haven't had any lookups in the last hour (per
section 2.3 of the paper)."""
results = []
for node_id in self.protocol.get_refresh_ids():
node = create_kad_peerinfo(node_id)
@ -98,8 +94,7 @@ class KademliaServer:
await self.set_digest(dkey, value)
def bootstrappable_neighbors(self):
"""
Get a :class:`list` of (ip, port) :class:`tuple` pairs suitable for
"""Get a :class:`list` of (ip, port) :class:`tuple` pairs suitable for
use as an argument to the bootstrap method.
The server should have been bootstrapped
@ -111,8 +106,8 @@ class KademliaServer:
return [tuple(n)[-2:] for n in neighbors]
async def bootstrap(self, addrs):
"""
Bootstrap the server by connecting to other known nodes in the network.
"""Bootstrap the server by connecting to other known nodes in the
network.
Args:
addrs: A `list` of (ip, port) `tuple` pairs. Note that only IP
@ -132,8 +127,7 @@ class KademliaServer:
return create_kad_peerinfo(result[1], addr[0], addr[1]) if result[0] else None
async def get(self, key):
"""
Get a key if the network has it.
"""Get a key if the network has it.
Returns:
:class:`None` if not found, the value otherwise.
@ -153,9 +147,7 @@ class KademliaServer:
return await spider.find()
async def set(self, key, value):
"""
Set the given string key to the given value in the network.
"""
"""Set the given string key to the given value in the network."""
if not check_dht_value_type(value):
raise TypeError("Value must be of type int, float, bool, str, or bytes")
log.info("setting '%s' = '%s' on network", key, value)
@ -163,9 +155,7 @@ class KademliaServer:
return await self.set_digest(dkey, value)
async def provide(self, key):
"""
publish to the network that it provides for a particular key
"""
"""publish to the network that it provides for a particular key."""
neighbors = self.protocol.router.find_neighbors(self.node)
return [
await self.protocol.call_add_provider(n, key, self.node.peer_id_bytes)
@ -173,17 +163,13 @@ class KademliaServer:
]
async def get_providers(self, key):
"""
get the list of providers for a key
"""
"""get the list of providers for a key."""
neighbors = self.protocol.router.find_neighbors(self.node)
return [await self.protocol.call_get_providers(n, key) for n in neighbors]
async def set_digest(self, dkey, value):
"""
Set the given SHA1 digest key (bytes) to the given value in the
network.
"""
"""Set the given SHA1 digest key (bytes) to the given value in the
network."""
node = create_kad_peerinfo(dkey)
nearest = self.protocol.router.find_neighbors(node)
@ -204,10 +190,8 @@ class KademliaServer:
return any(await asyncio.gather(*results))
def save_state(self, fname):
"""
Save the state of this node (the alpha/ksize/id/immediate neighbors)
to a cache file with the given fname.
"""
"""Save the state of this node (the alpha/ksize/id/immediate neighbors)
to a cache file with the given fname."""
log.info("Saving state to %s", fname)
data = {
"ksize": self.ksize,
@ -223,10 +207,8 @@ class KademliaServer:
@classmethod
def load_state(cls, fname):
"""
Load the state of this node (the alpha/ksize/id/immediate neighbors)
from a cache file with the given fname.
"""
"""Load the state of this node (the alpha/ksize/id/immediate neighbors)
from a cache file with the given fname."""
log.info("Loading state from %s", fname)
with open(fname, "rb") as file:
data = pickle.load(file)
@ -236,8 +218,7 @@ class KademliaServer:
return svr
def save_state_regularly(self, fname, frequency=600):
"""
Save the state of node with a given regularity to the given
"""Save the state of node with a given regularity to the given
filename.
Args:
@ -253,9 +234,7 @@ class KademliaServer:
def check_dht_value_type(value):
"""
Checks to see if the type of the value is a valid type for
placing in the dht.
"""
"""Checks to see if the type of the value is a valid type for placing in
the dht."""
typeset = [int, float, bool, str, bytes]
return type(value) in typeset

46
libp2p/kademlia/protocol.py
View File

@ -11,15 +11,11 @@ log = logging.getLogger(__name__)
class KademliaProtocol(RPCProtocol):
"""
There are four main RPCs in the Kademlia protocol
PING, STORE, FIND_NODE, FIND_VALUE
PING probes if a node is still online
STORE instructs a node to store (key, value)
FIND_NODE takes a 160-bit ID and gets back
(ip, udp_port, node_id) for k closest nodes to target
FIND_VALUE behaves like FIND_NODE unless a value is stored
"""
"""There are four main RPCs in the Kademlia protocol PING, STORE,
FIND_NODE, FIND_VALUE PING probes if a node is still online STORE instructs
a node to store (key, value) FIND_NODE takes a 160-bit ID and gets back
(ip, udp_port, node_id) for k closest nodes to target FIND_VALUE behaves
like FIND_NODE unless a value is stored."""
def __init__(self, source_node, storage, ksize):
RPCProtocol.__init__(self)
@ -28,9 +24,7 @@ class KademliaProtocol(RPCProtocol):
self.source_node = source_node
def get_refresh_ids(self):
"""
Get ids to search for to keep old buckets up to date.
"""
"""Get ids to search for to keep old buckets up to date."""
ids = []
for bucket in self.router.lonely_buckets():
rid = random.randint(*bucket.range).to_bytes(20, byteorder="big")
@ -75,12 +69,10 @@ class KademliaProtocol(RPCProtocol):
return {"value": value}
def rpc_add_provider(self, sender, nodeid, key, provider_id):
"""
rpc when receiving an add_provider call
should validate received PeerInfo matches sender nodeid
if it does, receipient must store a record in its datastore
we store a map of content_id to peer_id (non xor)
"""
"""rpc when receiving an add_provider call should validate received
PeerInfo matches sender nodeid if it does, receipient must store a
record in its datastore we store a map of content_id to peer_id (non
xor)"""
if nodeid == provider_id:
log.info(
"adding provider %s for key %s in local table", provider_id, str(key)
@ -90,11 +82,9 @@ class KademliaProtocol(RPCProtocol):
return False
def rpc_get_providers(self, sender, key):
"""
rpc when receiving a get_providers call
should look up key in data store and respond with records
plus a list of closer peers in its routing table
"""
"""rpc when receiving a get_providers call should look up key in data
store and respond with records plus a list of closer peers in its
routing table."""
providers = []
record = self.storage.get(key, None)
@ -147,8 +137,7 @@ class KademliaProtocol(RPCProtocol):
return self.handle_call_response(result, node_to_ask)
def welcome_if_new(self, node):
"""
Given a new node, send it all the keys/values it should be storing,
"""Given a new node, send it all the keys/values it should be storing,
then add it to the routing table.
@param node: A new node that just joined (or that we just found out
@ -177,9 +166,10 @@ class KademliaProtocol(RPCProtocol):
self.router.add_contact(node)
def handle_call_response(self, result, node):
"""
If we get a response, add the node to the routing table. If
we get no response, make sure it's removed from the routing table.
"""If we get a response, add the node to the routing table.
If we get no response, make sure it's removed from the routing
table.
"""
if not result[0]:
log.warning("no response from %s, removing from router", node)

29
libp2p/kademlia/routing.py
View File

@ -8,13 +8,10 @@ from .utils import OrderedSet, bytes_to_bit_string, shared_prefix
class KBucket:
"""
each node keeps a list of (ip, udp_port, node_id)
for nodes of distance between 2^i and 2^(i+1)
this list that every node keeps is a k-bucket
each k-bucket implements a last seen eviction
policy except that live nodes are never removed
"""
"""each node keeps a list of (ip, udp_port, node_id) for nodes of distance
between 2^i and 2^(i+1) this list that every node keeps is a k-bucket each
k-bucket implements a last seen eviction policy except that live nodes are
never removed."""
def __init__(self, rangeLower, rangeUpper, ksize):
self.range = (rangeLower, rangeUpper)
@ -55,9 +52,8 @@ class KBucket:
return node.peer_id_bytes not in self.nodes
def add_node(self, node):
"""
Add a C{Node} to the C{KBucket}. Return True if successful,
False if the bucket is full.
"""Add a C{Node} to the C{KBucket}. Return True if successful, False
if the bucket is full.
If the bucket is full, keep track of node in a replacement list,
per section 4.1 of the paper.
@ -100,9 +96,7 @@ class TableTraverser:
return self
def __next__(self):
"""
Pop an item from the left subtree, then right, then left, etc.
"""
"""Pop an item from the left subtree, then right, then left, etc."""
if self.current_nodes:
return self.current_nodes.pop()
@ -140,10 +134,7 @@ class RoutingTable:
self.buckets.insert(index + 1, two)
def lonely_buckets(self):
"""
Get all of the buckets that haven't been updated in over
an hour.
"""
"""Get all of the buckets that haven't been updated in over an hour."""
hrago = time.monotonic() - 3600
return [b for b in self.buckets if b.last_updated < hrago]
@ -172,9 +163,7 @@ class RoutingTable:
asyncio.ensure_future(self.protocol.call_ping(bucket.head()))
def get_bucket_for(self, node):
"""
Get the index of the bucket that the given node would fall into.
"""
"""Get the index of the bucket that the given node would fall into."""
for index, bucket in enumerate(self.buckets):
if node.xor_id < bucket.range[1]:
return index

36
libp2p/kademlia/storage.py
View File

@ -6,48 +6,44 @@ import time
class IStorage(ABC):
"""
Local storage for this node.
IStorage implementations of get must return the same type as put in by set
"""Local storage for this node.
IStorage implementations of get must return the same type as put in
by set
"""
@abstractmethod
def __setitem__(self, key, value):
"""
Set a key to the given value.
"""
"""Set a key to the given value."""
@abstractmethod
def __getitem__(self, key):
"""
Get the given key. If item doesn't exist, raises C{KeyError}
"""Get the given key.
If item doesn't exist, raises C{KeyError}
"""
@abstractmethod
def get(self, key, default=None):
"""
Get given key. If not found, return default.
"""Get given key.
If not found, return default.
"""
@abstractmethod
def iter_older_than(self, seconds_old):
"""
Return the an iterator over (key, value) tuples for items older
than the given seconds_old.
"""
"""Return the an iterator over (key, value) tuples for items older than
the given seconds_old."""
@abstractmethod
def __iter__(self):
"""
Get the iterator for this storage, should yield tuple of (key, value)
"""
"""Get the iterator for this storage, should yield tuple of (key,
value)"""
class ForgetfulStorage(IStorage):
def __init__(self, ttl=604800):
"""
By default, max age is a week.
"""
"""By default, max age is a week."""
self.data = OrderedDict()
self.ttl = ttl

11
libp2p/kademlia/utils.py
View File

@ -1,6 +1,4 @@
"""
General catchall for functions that don't make sense as methods.
"""
"""General catchall for functions that don't make sense as methods."""
import asyncio
import hashlib
import operator
@ -19,8 +17,8 @@ def digest(string):
class OrderedSet(list):
"""
Acts like a list in all ways, except in the behavior of the
"""Acts like a list in all ways, except in the behavior of the.
:meth:`push` method.
"""
@ -35,8 +33,7 @@ class OrderedSet(list):
def shared_prefix(args):
"""
Find the shared prefix between the strings.
"""Find the shared prefix between the strings.
For instance:

9
libp2p/network/connection/raw_connection.py
View File

@ -24,9 +24,7 @@ class RawConnection(IRawConnection):
self._drain_lock = asyncio.Lock()
async def write(self, data: bytes) -> None:
"""
Raise `RawConnError` if the underlying connection breaks
"""
"""Raise `RawConnError` if the underlying connection breaks."""
try:
self.writer.write(data)
except ConnectionResetError as error:
@ -41,9 +39,8 @@ class RawConnection(IRawConnection):
raise RawConnError(error)
async def read(self, n: int = -1) -> bytes:
"""
Read up to ``n`` bytes from the underlying stream.
This call is delegated directly to the underlying ``self.reader``.
"""Read up to ``n`` bytes from the underlying stream. This call is
delegated directly to the underlying ``self.reader``.
Raise `RawConnError` if the underlying connection breaks
"""

4
libp2p/network/connection/raw_connection_interface.py
View File

@ -2,8 +2,6 @@ from libp2p.io.abc import ReadWriteCloser
class IRawConnection(ReadWriteCloser):
"""
A Raw Connection provides a Reader and a Writer
"""
"""A Raw Connection provides a Reader and a Writer."""
initiator: bool

7
libp2p/network/network_interface.py
View File

@ -29,8 +29,7 @@ class INetwork(ABC):
@abstractmethod
async def dial_peer(self, peer_id: ID) -> INetConn:
"""
dial_peer try to create a connection to peer_id
"""dial_peer try to create a connection to peer_id.
:param peer_id: peer if we want to dial
:raises SwarmException: raised when an error occurs
@ -47,9 +46,7 @@ class INetwork(ABC):
@abstractmethod
def set_stream_handler(self, stream_handler: StreamHandlerFn) -> None:
"""
Set the stream handler for all incoming streams.
"""
"""Set the stream handler for all incoming streams."""
@abstractmethod
async def listen(self, *multiaddrs: Sequence[Multiaddr]) -> bool:

12
libp2p/network/stream/net_stream.py
View File

@ -38,8 +38,8 @@ class NetStream(INetStream):
self.protocol_id = protocol_id
async def read(self, n: int = -1) -> bytes:
"""
reads from stream
"""reads from stream.
:param n: number of bytes to read
:return: bytes of input
"""
@ -51,8 +51,8 @@ class NetStream(INetStream):
raise StreamReset from error
async def write(self, data: bytes) -> int:
"""
write to stream
"""write to stream.
:return: number of bytes written
"""
try:
@ -61,9 +61,7 @@ class NetStream(INetStream):
raise StreamClosed from error
async def close(self) -> None:
"""
close stream
"""
"""close stream."""
await self.muxed_stream.close()
async def reset(self) -> None:

4
libp2p/network/stream/net_stream_interface.py
View File

@ -23,6 +23,4 @@ class INetStream(ReadWriteCloser):
@abstractmethod
async def reset(self) -> None:
"""
Close both ends of the stream.
"""
"""Close both ends of the stream."""

16
libp2p/network/swarm.py
View File

@ -69,8 +69,8 @@ class Swarm(INetwork):
self.common_stream_handler = stream_handler
async def dial_peer(self, peer_id: ID) -> INetConn:
"""
dial_peer try to create a connection to peer_id
"""dial_peer try to create a connection to peer_id.
:param peer_id: peer if we want to dial
:raises SwarmException: raised when an error occurs
:return: muxed connection
@ -254,10 +254,9 @@ class Swarm(INetwork):
logger.debug("successfully close the connection to peer %s", peer_id)
async def add_conn(self, muxed_conn: IMuxedConn) -> SwarmConn:
"""
Add a `IMuxedConn` to `Swarm` as a `SwarmConn`, notify "connected",
and start to monitor the connection for its new streams and disconnection.
"""
"""Add a `IMuxedConn` to `Swarm` as a `SwarmConn`, notify "connected",
and start to monitor the connection for its new streams and
disconnection."""
swarm_conn = SwarmConn(muxed_conn, self)
# Store muxed_conn with peer id
self.connections[muxed_conn.peer_id] = swarm_conn
@ -267,9 +266,8 @@ class Swarm(INetwork):
return swarm_conn
def remove_conn(self, swarm_conn: SwarmConn) -> None:
"""
Simply remove the connection from Swarm's records, without closing the connection.
"""
"""Simply remove the connection from Swarm's records, without closing
the connection."""
peer_id = swarm_conn.muxed_conn.peer_id
if peer_id not in self.connections:
return

17
libp2p/peer/addrbook_interface.py
View File

@ -12,8 +12,8 @@ class IAddrBook(ABC):
@abstractmethod
def add_addr(self, peer_id: ID, addr: Multiaddr, ttl: int) -> None:
"""
Calls add_addrs(peer_id, [addr], ttl)
"""Calls add_addrs(peer_id, [addr], ttl)
:param peer_id: the peer to add address for
:param addr: multiaddress of the peer
:param ttl: time-to-live for the address (after this time, address is no longer valid)
@ -21,10 +21,11 @@ class IAddrBook(ABC):
@abstractmethod
def add_addrs(self, peer_id: ID, addrs: Sequence[Multiaddr], ttl: int) -> None:
"""
Adds addresses for a given peer all with the same time-to-live. If one of the
addresses already exists for the peer and has a longer TTL, no operation should take place.
If one of the addresses exists with a shorter TTL, extend the TTL to equal param ttl.
"""Adds addresses for a given peer all with the same time-to-live. If
one of the addresses already exists for the peer and has a longer TTL,
no operation should take place. If one of the addresses exists with a
shorter TTL, extend the TTL to equal param ttl.
:param peer_id: the peer to add address for
:param addr: multiaddresses of the peer
:param ttl: time-to-live for the address (after this time, address is no longer valid
@ -39,8 +40,8 @@ class IAddrBook(ABC):
@abstractmethod
def clear_addrs(self, peer_id: ID) -> None:
"""
Removes all previously stored addresses
"""Removes all previously stored addresses.
:param peer_id: peer to remove addresses of
"""

2
libp2p/peer/peerdata.py
View File

@ -44,4 +44,4 @@ class PeerData(IPeerData):
class PeerDataError(KeyError):
"""Raised when a key is not found in peer metadata"""
"""Raised when a key is not found in peer metadata."""

4
libp2p/peer/peerdata_interface.py
View File

@ -39,9 +39,7 @@ class IPeerData(ABC):
@abstractmethod
def clear_addrs(self) -> None:
"""
Clear all addresses
"""
"""Clear all addresses."""
@abstractmethod
def put_metadata(self, key: str, val: Any) -> None:

9
libp2p/peer/peerstore.py
View File

@ -17,10 +17,9 @@ class PeerStore(IPeerStore):
self.peer_map = {}
def __create_or_get_peer(self, peer_id: ID) -> PeerData:
"""
Returns the peer data for peer_id or creates a new
peer data (and stores it in peer_map) if peer
data for peer_id does not yet exist
"""Returns the peer data for peer_id or creates a new peer data (and
stores it in peer_map) if peer data for peer_id does not yet exist.
:param peer_id: peer ID
:return: peer data
"""
@ -93,4 +92,4 @@ class PeerStore(IPeerStore):
class PeerStoreError(KeyError):
"""Raised when peer ID is not found in peer store"""
"""Raised when peer ID is not found in peer store."""

6
libp2p/protocol_muxer/exceptions.py
View File

@ -2,12 +2,12 @@ from libp2p.exceptions import BaseLibp2pError
class MultiselectCommunicatorError(BaseLibp2pError):
"""Raised when an error occurs during read/write via communicator"""
"""Raised when an error occurs during read/write via communicator."""
class MultiselectError(BaseLibp2pError):
"""Raised when an error occurs in multiselect process"""
"""Raised when an error occurs in multiselect process."""
class MultiselectClientError(BaseLibp2pError):
"""Raised when an error occurs in protocol selection process"""
"""Raised when an error occurs in protocol selection process."""

24
libp2p/protocol_muxer/multiselect.py
View File

@ -11,11 +11,9 @@ PROTOCOL_NOT_FOUND_MSG = "na"
class Multiselect(IMultiselectMuxer):
"""
Multiselect module that is responsible for responding to
a multiselect client and deciding on
a specific protocol and handler pair to use for communication
"""
"""Multiselect module that is responsible for responding to a multiselect
client and deciding on a specific protocol and handler pair to use for
communication."""
handlers: Dict[TProtocol, StreamHandlerFn]
@ -23,8 +21,8 @@ class Multiselect(IMultiselectMuxer):
self.handlers = {}
def add_handler(self, protocol: TProtocol, handler: StreamHandlerFn) -> None:
"""
Store the handler with the given protocol
"""Store the handler with the given protocol.
:param protocol: protocol name
:param handler: handler function
"""
@ -33,8 +31,8 @@ class Multiselect(IMultiselectMuxer):
async def negotiate(
self, communicator: IMultiselectCommunicator
) -> Tuple[TProtocol, StreamHandlerFn]:
"""
Negotiate performs protocol selection
"""Negotiate performs protocol selection.
:param stream: stream to negotiate on
:return: selected protocol name, handler function
:raise MultiselectError: raised when negotiation failed
@ -65,8 +63,8 @@ class Multiselect(IMultiselectMuxer):
raise MultiselectError(error)
async def handshake(self, communicator: IMultiselectCommunicator) -> None:
"""
Perform handshake to agree on multiselect protocol
"""Perform handshake to agree on multiselect protocol.
:param communicator: communicator to use
:raise MultiselectError: raised when handshake failed
"""
@ -88,8 +86,8 @@ class Multiselect(IMultiselectMuxer):
def validate_handshake(handshake_contents: str) -> bool:
"""
Determine if handshake is valid and should be confirmed
"""Determine if handshake is valid and should be confirmed.
:param handshake_contents: contents of handshake message
:return: true if handshake is complete, false otherwise
"""

24
libp2p/protocol_muxer/multiselect_client.py
View File

@ -11,15 +11,13 @@ PROTOCOL_NOT_FOUND_MSG = "na"
class MultiselectClient(IMultiselectClient):
"""
Client for communicating with receiver's multiselect
module in order to select a protocol id to communicate over
"""
"""Client for communicating with receiver's multiselect module in order to
select a protocol id to communicate over."""
async def handshake(self, communicator: IMultiselectCommunicator) -> None:
"""
Ensure that the client and multiselect
are both using the same multiselect protocol
"""Ensure that the client and multiselect are both using the same
multiselect protocol.
:param stream: stream to communicate with multiselect over
:raise MultiselectClientError: raised when handshake failed
"""
@ -39,10 +37,10 @@ class MultiselectClient(IMultiselectClient):
async def select_one_of(
self, protocols: Sequence[TProtocol], communicator: IMultiselectCommunicator
) -> TProtocol:
"""
For each protocol, send message to multiselect selecting protocol
"""For each protocol, send message to multiselect selecting protocol
and fail if multiselect does not return same protocol. Returns first
protocol that multiselect agrees on (i.e. that multiselect selects)
:param protocol: protocol to select
:param stream: stream to communicate with multiselect over
:return: selected protocol
@ -62,8 +60,8 @@ class MultiselectClient(IMultiselectClient):
async def try_select(
self, communicator: IMultiselectCommunicator, protocol: TProtocol
) -> TProtocol:
"""
Try to select the given protocol or raise exception if fails
"""Try to select the given protocol or raise exception if fails.
:param communicator: communicator to use to communicate with counterparty
:param protocol: protocol to select
:raise MultiselectClientError: raised when protocol negotiation failed
@ -87,8 +85,8 @@ class MultiselectClient(IMultiselectClient):
def validate_handshake(handshake_contents: str) -> bool:
"""
Determine if handshake is valid and should be confirmed
"""Determine if handshake is valid and should be confirmed.
:param handshake_contents: contents of handshake message
:return: true if handshake is complete, false otherwise
"""

20
libp2p/protocol_muxer/multiselect_client_interface.py
View File

@ -8,15 +8,13 @@ from libp2p.typing import TProtocol
class IMultiselectClient(ABC):
"""
Client for communicating with receiver's multiselect
module in order to select a protocol id to communicate over
"""
"""Client for communicating with receiver's multiselect module in order to
select a protocol id to communicate over."""
async def handshake(self, communicator: IMultiselectCommunicator) -> None:
"""
Ensure that the client and multiselect
are both using the same multiselect protocol
"""Ensure that the client and multiselect are both using the same
multiselect protocol.
:param stream: stream to communicate with multiselect over
:raise Exception: multiselect protocol ID mismatch
"""
@ -25,10 +23,10 @@ class IMultiselectClient(ABC):
async def select_one_of(
self, protocols: Sequence[TProtocol], communicator: IMultiselectCommunicator
) -> TProtocol:
"""
For each protocol, send message to multiselect selecting protocol
"""For each protocol, send message to multiselect selecting protocol
and fail if multiselect does not return same protocol. Returns first
protocol that multiselect agrees on (i.e. that multiselect selects)
:param protocol: protocol to select
:param stream: stream to communicate with multiselect over
:return: selected protocol
@ -37,8 +35,8 @@ class IMultiselectClient(ABC):
async def try_select(
self, communicator: IMultiselectCommunicator, protocol: TProtocol
) -> TProtocol:
"""
Try to select the given protocol or raise exception if fails
"""Try to select the given protocol or raise exception if fails.
:param communicator: communicator to use to communicate with counterparty
:param protocol: protocol to select
:raise Exception: error in protocol selection

16
libp2p/protocol_muxer/multiselect_communicator_interface.py
View File

@ -2,21 +2,17 @@ from abc import ABC, abstractmethod
class IMultiselectCommunicator(ABC):
"""
Communicator helper class that ensures both the client
and multistream module will follow the same multistream protocol,
which is necessary for them to work
"""
"""Communicator helper class that ensures both the client and multistream
module will follow the same multistream protocol, which is necessary for
them to work."""
@abstractmethod
async def write(self, msg_str: str) -> None:
"""
Write message to stream
"""Write message to stream.
:param msg_str: message to write
"""
@abstractmethod
async def read(self) -> str:
"""
Reads message from stream until EOF
"""
"""Reads message from stream until EOF."""

16
libp2p/protocol_muxer/multiselect_muxer_interface.py
View File

@ -7,18 +7,16 @@ from .multiselect_communicator_interface import IMultiselectCommunicator
class IMultiselectMuxer(ABC):
"""
Multiselect module that is responsible for responding to
a multiselect client and deciding on
a specific protocol and handler pair to use for communication
"""
"""Multiselect module that is responsible for responding to a multiselect
client and deciding on a specific protocol and handler pair to use for
communication."""
handlers: Dict[TProtocol, StreamHandlerFn]
@abstractmethod
def add_handler(self, protocol: TProtocol, handler: StreamHandlerFn) -> None:
"""
Store the handler with the given protocol
"""Store the handler with the given protocol.
:param protocol: protocol name
:param handler: handler function
"""
@ -27,8 +25,8 @@ class IMultiselectMuxer(ABC):
async def negotiate(
self, communicator: IMultiselectCommunicator
) -> Tuple[TProtocol, StreamHandlerFn]:
"""
Negotiate performs protocol selection
"""Negotiate performs protocol selection.
:param stream: stream to negotiate on
:return: selected protocol name, handler function
:raise Exception: negotiation failed exception

42
libp2p/pubsub/floodsub.py
View File

@ -31,36 +31,35 @@ class FloodSub(IPubsubRouter):
return self.protocols
def attach(self, pubsub: Pubsub) -> None:
"""
Attach is invoked by the PubSub constructor to attach the router to a
freshly initialized PubSub instance.
"""Attach is invoked by the PubSub constructor to attach the router to
a freshly initialized PubSub instance.
:param pubsub: pubsub instance to attach to
"""
self.pubsub = pubsub
def add_peer(self, peer_id: ID, protocol_id: TProtocol) -> None:
"""
Notifies the router that a new peer has been connected
"""Notifies the router that a new peer has been connected.
:param peer_id: id of peer to add
"""
def remove_peer(self, peer_id: ID) -> None:
"""
Notifies the router that a peer has been disconnected
"""Notifies the router that a peer has been disconnected.
:param peer_id: id of peer to remove
"""
async def handle_rpc(self, rpc: rpc_pb2.RPC, sender_peer_id: ID) -> None:
"""
Invoked to process control messages in the RPC envelope.
It is invoked after subscriptions and payload messages have been processed
"""Invoked to process control messages in the RPC envelope. It is
invoked after subscriptions and payload messages have been processed.
:param rpc: rpc message
"""
async def publish(self, msg_forwarder: ID, pubsub_msg: rpc_pb2.Message) -> None:
"""
Invoked to forward a new message that has been validated.
This is where the "flooding" part of floodsub happens
"""Invoked to forward a new message that has been validated. This is
where the "flooding" part of floodsub happens.
With flooding, routing is almost trivial: for each incoming message,
forward to all known peers in the topic. There is a bit of logic,
@ -88,25 +87,24 @@ class FloodSub(IPubsubRouter):
await stream.write(encode_varint_prefixed(rpc_msg.SerializeToString()))
async def join(self, topic: str) -> None:
"""
Join notifies the router that we want to receive and
forward messages in a topic. It is invoked after the
subscription announcement
"""Join notifies the router that we want to receive and forward
messages in a topic. It is invoked after the subscription announcement.
:param topic: topic to join
"""
async def leave(self, topic: str) -> None:
"""
Leave notifies the router that we are no longer interested in a topic.
It is invoked after the unsubscription announcement.
"""Leave notifies the router that we are no longer interested in a
topic. It is invoked after the unsubscription announcement.
:param topic: topic to leave
"""
def _get_peers_to_send(
self, topic_ids: Iterable[str], msg_forwarder: ID, origin: ID
) -> Iterable[ID]:
"""
Get the eligible peers to send the data to.
"""Get the eligible peers to send the data to.
:param msg_forwarder: peer ID of the peer who forwards the message to us.
:param origin: peer id of the peer the message originate from.
:return: a generator of the peer ids who we send data to.

71
libp2p/pubsub/gossipsub.py
View File

@ -94,9 +94,9 @@ class GossipSub(IPubsubRouter):
return self.protocols
def attach(self, pubsub: Pubsub) -> None:
"""
Attach is invoked by the PubSub constructor to attach the router to a
freshly initialized PubSub instance.
"""Attach is invoked by the PubSub constructor to attach the router to
a freshly initialized PubSub instance.
:param pubsub: pubsub instance to attach to
"""
self.pubsub = pubsub
@ -108,8 +108,8 @@ class GossipSub(IPubsubRouter):
asyncio.ensure_future(self.heartbeat())
def add_peer(self, peer_id: ID, protocol_id: TProtocol) -> None:
"""
Notifies the router that a new peer has been connected
"""Notifies the router that a new peer has been connected.
:param peer_id: id of peer to add
:param protocol_id: router protocol the peer speaks, e.g., floodsub, gossipsub
"""
@ -129,8 +129,8 @@ class GossipSub(IPubsubRouter):
self.peers_to_protocol[peer_id] = protocol_id
def remove_peer(self, peer_id: ID) -> None:
"""
Notifies the router that a peer has been disconnected
"""Notifies the router that a peer has been disconnected.
:param peer_id: id of peer to remove
"""
logger.debug("removing peer %s", peer_id)
@ -144,9 +144,9 @@ class GossipSub(IPubsubRouter):
del self.peers_to_protocol[peer_id]
async def handle_rpc(self, rpc: rpc_pb2.RPC, sender_peer_id: ID) -> None:
"""
Invoked to process control messages in the RPC envelope.
It is invoked after subscriptions and payload messages have been processed
"""Invoked to process control messages in the RPC envelope. It is
invoked after subscriptions and payload messages have been processed.
:param rpc: RPC message
:param sender_peer_id: id of the peer who sent the message
"""
@ -167,9 +167,7 @@ class GossipSub(IPubsubRouter):
await self.handle_prune(prune, sender_peer_id)
async def publish(self, msg_forwarder: ID, pubsub_msg: rpc_pb2.Message) -> None:
"""
Invoked to forward a new message that has been validated.
"""
"""Invoked to forward a new message that has been validated."""
self.mcache.put(pubsub_msg)
peers_gen = self._get_peers_to_send(
@ -191,8 +189,8 @@ class GossipSub(IPubsubRouter):
def _get_peers_to_send(
self, topic_ids: Iterable[str], msg_forwarder: ID, origin: ID
) -> Iterable[ID]:
"""
Get the eligible peers to send the data to.
"""Get the eligible peers to send the data to.
:param msg_forwarder: the peer id of the peer who forwards the message to me.
:param origin: peer id of the peer the message originate from.
:return: a generator of the peer ids who we send data to.
@ -233,10 +231,9 @@ class GossipSub(IPubsubRouter):
async def join(self, topic: str) -> None:
# Note: the comments here are the near-exact algorithm description from the spec
"""
Join notifies the router that we want to receive and
forward messages in a topic. It is invoked after the
subscription announcement
"""Join notifies the router that we want to receive and forward
messages in a topic. It is invoked after the subscription announcement.
:param topic: topic to join
"""
logger.debug("joining topic %s", topic)
@ -271,9 +268,9 @@ class GossipSub(IPubsubRouter):
async def leave(self, topic: str) -> None:
# Note: the comments here are the near-exact algorithm description from the spec
"""
Leave notifies the router that we are no longer interested in a topic.
It is invoked after the unsubscription announcement.
"""Leave notifies the router that we are no longer interested in a
topic. It is invoked after the unsubscription announcement.
:param topic: topic to leave
"""
logger.debug("leaving topic %s", topic)
@ -289,8 +286,8 @@ class GossipSub(IPubsubRouter):
# Heartbeat
async def heartbeat(self) -> None:
"""
Call individual heartbeats.
"""Call individual heartbeats.
Note: the heartbeats are called with awaits because each heartbeat depends on the
state changes in the preceding heartbeat
"""
@ -453,9 +450,8 @@ class GossipSub(IPubsubRouter):
async def handle_ihave(
self, ihave_msg: rpc_pb2.ControlIHave, sender_peer_id: ID
) -> None:
"""
Checks the seen set and requests unknown messages with an IWANT message.
"""
"""Checks the seen set and requests unknown messages with an IWANT
message."""
# Get list of all seen (seqnos, from) from the (seqno, from) tuples in seen_messages cache
seen_seqnos_and_peers = [
seqno_and_from for seqno_and_from in self.pubsub.seen_messages.keys()
@ -477,9 +473,8 @@ class GossipSub(IPubsubRouter):
async def handle_iwant(
self, iwant_msg: rpc_pb2.ControlIWant, sender_peer_id: ID
) -> None:
"""
Forwards all request messages that are present in mcache to the requesting peer.
"""
"""Forwards all request messages that are present in mcache to the
requesting peer."""
# FIXME: Update type of message ID
# FIXME: Find a better way to parse the msg ids
msg_ids: List[Any] = [literal_eval(msg) for msg in iwant_msg.messageIDs]
@ -536,9 +531,7 @@ class GossipSub(IPubsubRouter):
# RPC emitters
async def emit_ihave(self, topic: str, msg_ids: Any, to_peer: ID) -> None:
"""
Emit ihave message, sent to to_peer, for topic and msg_ids
"""
"""Emit ihave message, sent to to_peer, for topic and msg_ids."""
ihave_msg: rpc_pb2.ControlIHave = rpc_pb2.ControlIHave()
ihave_msg.messageIDs.extend(msg_ids)
@ -550,9 +543,7 @@ class GossipSub(IPubsubRouter):
await self.emit_control_message(control_msg, to_peer)
async def emit_iwant(self, msg_ids: Any, to_peer: ID) -> None:
"""
Emit iwant message, sent to to_peer, for msg_ids
"""
"""Emit iwant message, sent to to_peer, for msg_ids."""
iwant_msg: rpc_pb2.ControlIWant = rpc_pb2.ControlIWant()
iwant_msg.messageIDs.extend(msg_ids)
@ -563,9 +554,7 @@ class GossipSub(IPubsubRouter):
await self.emit_control_message(control_msg, to_peer)
async def emit_graft(self, topic: str, to_peer: ID) -> None:
"""
Emit graft message, sent to to_peer, for topic
"""
"""Emit graft message, sent to to_peer, for topic."""
graft_msg: rpc_pb2.ControlGraft = rpc_pb2.ControlGraft()
graft_msg.topicID = topic
@ -576,9 +565,7 @@ class GossipSub(IPubsubRouter):
await self.emit_control_message(control_msg, to_peer)
async def emit_prune(self, topic: str, to_peer: ID) -> None:
"""
Emit graft message, sent to to_peer, for topic
"""
"""Emit graft message, sent to to_peer, for topic."""
prune_msg: rpc_pb2.ControlPrune = rpc_pb2.ControlPrune()
prune_msg.topicID = topic

25
libp2p/pubsub/mcache.py
View File

@ -13,8 +13,8 @@ class CacheEntry:
"""
def __init__(self, mid: Tuple[bytes, bytes], topics: Sequence[str]) -> None:
"""
Constructor.
"""Constructor.
:param mid: (seqno, from_id) of the msg
:param topics: list of topics this message was sent on
"""
@ -32,8 +32,8 @@ class MessageCache:
history: List[List[CacheEntry]]
def __init__(self, window_size: int, history_size: int) -> None:
"""
Constructor.
"""Constructor.
:param window_size: Size of the window desired.
:param history_size: Size of the history desired.
:return: the MessageCache
@ -49,8 +49,8 @@ class MessageCache:
self.history = [[] for _ in range(history_size)]
def put(self, msg: rpc_pb2.Message) -> None:
"""
Put a message into the mcache.
"""Put a message into the mcache.
:param msg: The rpc message to put in. Should contain seqno and from_id
"""
mid: Tuple[bytes, bytes] = (msg.seqno, msg.from_id)
@ -59,8 +59,8 @@ class MessageCache:
self.history[0].append(CacheEntry(mid, msg.topicIDs))
def get(self, mid: Tuple[bytes, bytes]) -> Optional[rpc_pb2.Message]:
"""
Get a message from the mcache.
"""Get a message from the mcache.
:param mid: (seqno, from_id) of the message to get.
:return: The rpc message associated with this mid
"""
@ -70,8 +70,8 @@ class MessageCache:
return None
def window(self, topic: str) -> List[Tuple[bytes, bytes]]:
"""
Get the window for this topic.
"""Get the window for this topic.
:param topic: Topic whose message ids we desire.
:return: List of mids in the current window.
"""
@ -86,9 +86,8 @@ class MessageCache:
return mids
def shift(self) -> None:
"""
Shift the window over by 1 position, dropping the last element of the history.
"""
"""Shift the window over by 1 position, dropping the last element of
the history."""
last_entries: List[CacheEntry] = self.history[len(self.history) - 1]
for entry in last_entries:

79
libp2p/pubsub/pubsub.py
View File

@ -81,12 +81,14 @@ class Pubsub:
def __init__(
self, host: IHost, router: "IPubsubRouter", my_id: ID, cache_size: int = None
) -> None:
"""
Construct a new Pubsub object, which is responsible for handling all
"""Construct a new Pubsub object, which is responsible for handling all
Pubsub-related messages and relaying messages as appropriate to the
Pubsub router (which is responsible for choosing who to send messages to).
Pubsub router (which is responsible for choosing who to send messages
to).
Since the logic for choosing peers to send pubsub messages to is
in the router, the same Pubsub impl can back floodsub, gossipsub, etc.
in the router, the same Pubsub impl can back floodsub,
gossipsub, etc.
"""
self.host = host
self.router = router
@ -136,10 +138,8 @@ class Pubsub:
asyncio.ensure_future(self.handle_peer_queue())
def get_hello_packet(self) -> rpc_pb2.RPC:
"""
Generate subscription message with all topics we are subscribed to
only send hello packet if we have subscribed topics
"""
"""Generate subscription message with all topics we are subscribed to
only send hello packet if we have subscribed topics."""
packet = rpc_pb2.RPC()
for topic_id in self.my_topics:
packet.subscriptions.extend(
@ -148,9 +148,9 @@ class Pubsub:
return packet
async def continuously_read_stream(self, stream: INetStream) -> None:
"""
Read from input stream in an infinite loop. Process
messages from other nodes
"""Read from input stream in an infinite loop. Process messages from
other nodes.
:param stream: stream to continously read from
"""
peer_id = stream.muxed_conn.peer_id
@ -207,8 +207,9 @@ class Pubsub:
def set_topic_validator(
self, topic: str, validator: ValidatorFn, is_async_validator: bool
) -> None:
"""
Register a validator under the given topic. One topic can only have one validtor.
"""Register a validator under the given topic. One topic can only have
one validtor.
:param topic: the topic to register validator under
:param validator: the validator used to validate messages published to the topic
:param is_async_validator: indicate if the validator is an asynchronous validator
@ -216,16 +217,16 @@ class Pubsub:
self.topic_validators[topic] = TopicValidator(validator, is_async_validator)
def remove_topic_validator(self, topic: str) -> None:
"""
Remove the validator from the given topic.
"""Remove the validator from the given topic.
:param topic: the topic to remove validator from
"""
if topic in self.topic_validators:
del self.topic_validators[topic]
def get_msg_validators(self, msg: rpc_pb2.Message) -> Tuple[TopicValidator, ...]:
"""
Get all validators corresponding to the topics in the message.
"""Get all validators corresponding to the topics in the message.
:param msg: the message published to the topic
"""
return tuple(
@ -235,9 +236,9 @@ class Pubsub:
)
async def stream_handler(self, stream: INetStream) -> None:
"""
Stream handler for pubsub. Gets invoked whenever a new stream is created
on one of the supported pubsub protocols.
"""Stream handler for pubsub. Gets invoked whenever a new stream is
created on one of the supported pubsub protocols.
:param stream: newly created stream
"""
try:
@ -290,10 +291,10 @@ class Pubsub:
def handle_subscription(
self, origin_id: ID, sub_message: rpc_pb2.RPC.SubOpts
) -> None:
"""
Handle an incoming subscription message from a peer. Update internal
"""Handle an incoming subscription message from a peer. Update internal
mapping to mark the peer as subscribed or unsubscribed to topics as
defined in the subscription message
defined in the subscription message.
:param origin_id: id of the peer who subscribe to the message
:param sub_message: RPC.SubOpts
"""
@ -310,8 +311,8 @@ class Pubsub:
# FIXME(mhchia): Change the function name?
async def handle_talk(self, publish_message: rpc_pb2.Message) -> None:
"""
Put incoming message from a peer onto my blocking queue
"""Put incoming message from a peer onto my blocking queue.
:param publish_message: RPC.Message format
"""
@ -324,8 +325,8 @@ class Pubsub:
await self.my_topics[topic].put(publish_message)
async def subscribe(self, topic_id: str) -> "asyncio.Queue[rpc_pb2.Message]":
"""
Subscribe ourself to a topic
"""Subscribe ourself to a topic.
:param topic_id: topic_id to subscribe to
"""
@ -354,8 +355,8 @@ class Pubsub:
return self.my_topics[topic_id]
async def unsubscribe(self, topic_id: str) -> None:
"""
Unsubscribe ourself from a topic
"""Unsubscribe ourself from a topic.
:param topic_id: topic_id to unsubscribe from
"""
@ -380,8 +381,8 @@ class Pubsub:
await self.router.leave(topic_id)
async def message_all_peers(self, raw_msg: bytes) -> None:
"""
Broadcast a message to peers
"""Broadcast a message to peers.
:param raw_msg: raw contents of the message to broadcast
"""
@ -391,8 +392,8 @@ class Pubsub:
await stream.write(encode_varint_prefixed(raw_msg))
async def publish(self, topic_id: str, data: bytes) -> None:
"""
Publish data to a topic
"""Publish data to a topic.
:param topic_id: topic which we are going to publish the data to
:param data: data which we are publishing
"""
@ -411,8 +412,8 @@ class Pubsub:
logger.debug("successfully published message %s", msg)
async def validate_msg(self, msg_forwarder: ID, msg: rpc_pb2.Message) -> None:
"""
Validate the received message
"""Validate the received message.
:param msg_forwarder: the peer who forward us the message.
:param msg: the message.
"""
@ -440,8 +441,8 @@ class Pubsub:
raise ValidationError(f"Validation failed for msg={msg}")
async def push_msg(self, msg_forwarder: ID, msg: rpc_pb2.Message) -> None:
"""
Push a pubsub message to others.
"""Push a pubsub message to others.
:param msg_forwarder: the peer who forward us the message.
:param msg: the message we are going to push out.
"""
@ -481,9 +482,7 @@ class Pubsub:
await self.router.publish(msg_forwarder, msg)
def _next_seqno(self) -> bytes:
"""
Make the next message sequence id.
"""
"""Make the next message sequence id."""
self.counter += 1
return self.counter.to_bytes(8, "big")

7
libp2p/pubsub/pubsub_notifee.py
View File

@ -30,9 +30,10 @@ class PubsubNotifee(INotifee):
pass
async def connected(self, network: INetwork, conn: INetConn) -> None:
"""
Add peer_id to initiator_peers_queue, so that this peer_id can be used to
create a stream and we only want to have one pubsub stream with each peer.
"""Add peer_id to initiator_peers_queue, so that this peer_id can be
used to create a stream and we only want to have one pubsub stream with
each peer.
:param network: network the connection was opened on
:param conn: connection that was opened
"""

31
libp2p/pubsub/pubsub_router_interface.py
View File

@ -19,23 +19,23 @@ class IPubsubRouter(ABC):
@abstractmethod
def attach(self, pubsub: "Pubsub") -> None:
"""
Attach is invoked by the PubSub constructor to attach the router to a
freshly initialized PubSub instance.
"""Attach is invoked by the PubSub constructor to attach the router to
a freshly initialized PubSub instance.
:param pubsub: pubsub instance to attach to
"""
@abstractmethod
def add_peer(self, peer_id: ID, protocol_id: TProtocol) -> None:
"""
Notifies the router that a new peer has been connected
"""Notifies the router that a new peer has been connected.
:param peer_id: id of peer to add
"""
@abstractmethod
def remove_peer(self, peer_id: ID) -> None:
"""
Notifies the router that a peer has been disconnected
"""Notifies the router that a peer has been disconnected.
:param peer_id: id of peer to remove
"""
@ -53,25 +53,24 @@ class IPubsubRouter(ABC):
# FIXME: Should be changed to type 'peer.ID'
@abstractmethod
async def publish(self, msg_forwarder: ID, pubsub_msg: rpc_pb2.Message) -> None:
"""
Invoked to forward a new message that has been validated
"""Invoked to forward a new message that has been validated.
:param msg_forwarder: peer_id of message sender
:param pubsub_msg: pubsub message to forward
"""
@abstractmethod
async def join(self, topic: str) -> None:
"""
Join notifies the router that we want to receive and
forward messages in a topic. It is invoked after the
subscription announcement
"""Join notifies the router that we want to receive and forward
messages in a topic. It is invoked after the subscription announcement.
:param topic: topic to join
"""
@abstractmethod
async def leave(self, topic: str) -> None:
"""
Leave notifies the router that we are no longer interested in a topic.
It is invoked after the unsubscription announcement.
"""Leave notifies the router that we are no longer interested in a
topic. It is invoked after the unsubscription announcement.
:param topic: topic to leave
"""

4
libp2p/pubsub/validators.py
View File

@ -1,7 +1,7 @@
# FIXME: Replace the type of `pubkey` with a custom type `Pubkey`
def signature_validator(pubkey: bytes, msg: bytes) -> bool:
"""
Verify the message against the given public key.
"""Verify the message against the given public key.
:param pubkey: the public key which signs the message.
:param msg: the message signed.
"""

22
libp2p/routing/interfaces.py
View File

@ -8,25 +8,21 @@ from libp2p.peer.peerinfo import PeerInfo
class IContentRouting(ABC):
@abstractmethod
def provide(self, cid: bytes, announce: bool = True) -> None:
"""
Provide adds the given cid to the content routing system. If announce is True,
it also announces it, otherwise it is just kept in the local
accounting of which objects are being provided.
"""Provide adds the given cid to the content routing system.
If announce is True, it also announces it, otherwise it is just
kept in the local accounting of which objects are being
provided.
"""
@abstractmethod
def find_provider_iter(self, cid: bytes, count: int) -> Iterable[PeerInfo]:
"""
Search for peers who are able to provide a given key
returns an iterator of peer.PeerInfo
"""
"""Search for peers who are able to provide a given key returns an
iterator of peer.PeerInfo."""
class IPeerRouting(ABC):
@abstractmethod
async def find_peer(self, peer_id: ID) -> PeerInfo:
"""
Find specific Peer
FindPeer searches for a peer with given peer_id, returns a peer.PeerInfo
with relevant addresses.
"""
"""Find specific Peer FindPeer searches for a peer with given peer_id,
returns a peer.PeerInfo with relevant addresses."""

15
libp2p/routing/kademlia/kademlia_content_router.py
View File

@ -6,16 +6,15 @@ from libp2p.routing.interfaces import IContentRouting
class KadmeliaContentRouter(IContentRouting):
def provide(self, cid: bytes, announce: bool = True) -> None:
"""
Provide adds the given cid to the content routing system. If announce is True,
it also announces it, otherwise it is just kept in the local
accounting of which objects are being provided.
"""Provide adds the given cid to the content routing system.
If announce is True, it also announces it, otherwise it is just
kept in the local accounting of which objects are being
provided.
"""
# the DHT finds the closest peers to `key` using the `FIND_NODE` RPC
# then sends a `ADD_PROVIDER` RPC with its own `PeerInfo` to each of these peers.
def find_provider_iter(self, cid: bytes, count: int) -> Iterable[PeerInfo]:
"""
Search for peers who are able to provide a given key
returns an iterator of peer.PeerInfo
"""
"""Search for peers who are able to provide a given key returns an
iterator of peer.PeerInfo."""

4
libp2p/routing/kademlia/kademlia_peer_router.py
View File

@ -15,8 +15,8 @@ class KadmeliaPeerRouter(IPeerRouting):
self.server = dht_server
async def find_peer(self, peer_id: ID) -> PeerInfo:
"""
Find a specific peer
"""Find a specific peer.
:param peer_id: peer to search for
:return: PeerInfo of specified peer
"""

6
libp2p/security/base_session.py
View File

@ -6,10 +6,8 @@ from libp2p.security.secure_conn_interface import ISecureConn
class BaseSession(ISecureConn):
"""
``BaseSession`` is not fully instantiated from its abstract classes as it
is only meant to be used in clases that derive from it.
"""
"""``BaseSession`` is not fully instantiated from its abstract classes as
it is only meant to be used in clases that derive from it."""
local_peer: ID
local_private_key: PrivateKey

11
libp2p/security/base_transport.py
View File

@ -11,13 +11,12 @@ def default_secure_bytes_provider(n: int) -> bytes:
class BaseSecureTransport(ISecureTransport):
"""
``BaseSecureTransport`` is not fully instantiated from its abstract classes as it
is only meant to be used in clases that derive from it.
"""``BaseSecureTransport`` is not fully instantiated from its abstract
classes as it is only meant to be used in clases that derive from it.
Clients can provide a strategy to get cryptographically secure bytes of a given length.
A default implementation is provided using the ``secrets`` module from the
standard library.
Clients can provide a strategy to get cryptographically secure bytes
of a given length. A default implementation is provided using the
``secrets`` module from the standard library.
"""
def __init__(

25
libp2p/security/insecure/transport.py
View File

@ -45,9 +45,7 @@ class InsecureSession(BaseSession):
await self.conn.close()
async def run_handshake(self) -> None:
"""
Raise `HandshakeFailure` when handshake failed
"""
"""Raise `HandshakeFailure` when handshake failed."""
msg = make_exchange_message(self.local_private_key.get_public_key())
msg_bytes = msg.SerializeToString()
encoded_msg_bytes = encode_fixedint_prefixed(msg_bytes)
@ -101,15 +99,15 @@ class InsecureSession(BaseSession):
class InsecureTransport(BaseSecureTransport):
"""
``InsecureTransport`` provides the "identity" upgrader for a ``IRawConnection``,
i.e. the upgraded transport does not add any additional security.
"""
"""``InsecureTransport`` provides the "identity" upgrader for a
``IRawConnection``, i.e. the upgraded transport does not add any additional
security."""
async def secure_inbound(self, conn: IRawConnection) -> ISecureConn:
"""
Secure the connection, either locally or by communicating with opposing node via conn,
for an inbound connection (i.e. we are not the initiator)
"""Secure the connection, either locally or by communicating with
opposing node via conn, for an inbound connection (i.e. we are not the
initiator)
:return: secure connection object (that implements secure_conn_interface)
"""
session = InsecureSession(self.local_peer, self.local_private_key, conn, False)
@ -117,9 +115,10 @@ class InsecureTransport(BaseSecureTransport):
return session
async def secure_outbound(self, conn: IRawConnection, peer_id: ID) -> ISecureConn:
"""
Secure the connection, either locally or by communicating with opposing node via conn,
for an inbound connection (i.e. we are the initiator)
"""Secure the connection, either locally or by communicating with
opposing node via conn, for an inbound connection (i.e. we are the
initiator)
:return: secure connection object (that implements secure_conn_interface)
"""
session = InsecureSession(

6
libp2p/security/secio/exceptions.py
View File

@ -6,10 +6,8 @@ class SecioException(HandshakeFailure):
class SelfEncryption(SecioException):
"""
Raised to indicate that a host is attempting to encrypt communications
with itself.
"""
"""Raised to indicate that a host is attempting to encrypt communications
with itself."""
pass

35
libp2p/security/secio/transport.py
View File

@ -136,10 +136,8 @@ class SecureSession(BaseSession):
@dataclass(frozen=True)
class Proposal:
"""
A ``Proposal`` represents the set of session parameters one peer in a pair of
peers attempting to negotiate a `secio` channel prefers.
"""
"""A ``Proposal`` represents the set of session parameters one peer in a
pair of peers attempting to negotiate a `secio` channel prefers."""
nonce: bytes
public_key: PublicKey
@ -396,11 +394,10 @@ async def create_secure_session(
conn: IRawConnection,
remote_peer: PeerID = None,
) -> ISecureConn:
"""
Attempt the initial `secio` handshake with the remote peer.
If successful, return an object that provides secure communication to the
``remote_peer``.
Raise `SecioException` when `conn` closed.
"""Attempt the initial `secio` handshake with the remote peer.
If successful, return an object that provides secure communication
to the ``remote_peer``. Raise `SecioException` when `conn` closed.
Raise `InconsistentNonce` when handshake failed
"""
msg_io = MsgIOReadWriter(conn)
@ -431,18 +428,17 @@ async def create_secure_session(
class Transport(BaseSecureTransport):
"""
``Transport`` provides a security upgrader for a ``IRawConnection``,
following the `secio` protocol defined in the libp2p specs.
"""
"""``Transport`` provides a security upgrader for a ``IRawConnection``,
following the `secio` protocol defined in the libp2p specs."""
def get_nonce(self) -> bytes:
return self.secure_bytes_provider(NONCE_SIZE)
async def secure_inbound(self, conn: IRawConnection) -> ISecureConn:
"""
Secure the connection, either locally or by communicating with opposing node via conn,
for an inbound connection (i.e. we are not the initiator)
"""Secure the connection, either locally or by communicating with
opposing node via conn, for an inbound connection (i.e. we are not the
initiator)
:return: secure connection object (that implements secure_conn_interface)
"""
local_nonce = self.get_nonce()
@ -456,9 +452,10 @@ class Transport(BaseSecureTransport):
async def secure_outbound(
self, conn: IRawConnection, peer_id: PeerID
) -> ISecureConn:
"""
Secure the connection, either locally or by communicating with opposing node via conn,
for an inbound connection (i.e. we are the initiator)
"""Secure the connection, either locally or by communicating with
opposing node via conn, for an inbound connection (i.e. we are the
initiator)
:return: secure connection object (that implements secure_conn_interface)
"""
local_nonce = self.get_nonce()

14
libp2p/security/secure_transport_interface.py
View File

@ -16,16 +16,18 @@ Relevant go repo: https://github.com/libp2p/go-conn-security/blob/master/interfa
class ISecureTransport(ABC):
@abstractmethod
async def secure_inbound(self, conn: IRawConnection) -> ISecureConn:
"""
Secure the connection, either locally or by communicating with opposing node via conn,
for an inbound connection (i.e. we are not the initiator)
"""Secure the connection, either locally or by communicating with
opposing node via conn, for an inbound connection (i.e. we are not the
initiator)
:return: secure connection object (that implements secure_conn_interface)
"""
@abstractmethod
async def secure_outbound(self, conn: IRawConnection, peer_id: ID) -> ISecureConn:
"""
Secure the connection, either locally or by communicating with opposing node via conn,
for an inbound connection (i.e. we are the initiator)
"""Secure the connection, either locally or by communicating with
opposing node via conn, for an inbound connection (i.e. we are the
initiator)
:return: secure connection object (that implements secure_conn_interface)
"""

32
libp2p/security/security_multistream.py
View File

@ -21,8 +21,8 @@ Relevant go repo: https://github.com/libp2p/go-conn-security/blob/master/interfa
class SecurityMultistream(ABC):
"""
SSMuxer is a multistream stream security transport multiplexer.
"""SSMuxer is a multistream stream security transport multiplexer.
Go implementation: github.com/libp2p/go-conn-security-multistream/ssms.go
"""
@ -40,10 +40,10 @@ class SecurityMultistream(ABC):
self.add_transport(protocol, transport)
def add_transport(self, protocol: TProtocol, transport: ISecureTransport) -> None:
"""
Add a protocol and its corresponding transport to multistream-select(multiselect).
The order that a protocol is added is exactly the precedence it is negotiated in
multiselect.
"""Add a protocol and its corresponding transport to multistream-
select(multiselect). The order that a protocol is added is exactly the
precedence it is negotiated in multiselect.
:param protocol: the protocol name, which is negotiated in multiselect.
:param transport: the corresponding transportation to the ``protocol``.
"""
@ -56,9 +56,10 @@ class SecurityMultistream(ABC):
self.multiselect.add_handler(protocol, None)
async def secure_inbound(self, conn: IRawConnection) -> ISecureConn:
"""
Secure the connection, either locally or by communicating with opposing node via conn,
for an inbound connection (i.e. we are not the initiator)
"""Secure the connection, either locally or by communicating with
opposing node via conn, for an inbound connection (i.e. we are not the
initiator)
:return: secure connection object (that implements secure_conn_interface)
"""
transport = await self.select_transport(conn, False)
@ -66,9 +67,10 @@ class SecurityMultistream(ABC):
return secure_conn
async def secure_outbound(self, conn: IRawConnection, peer_id: ID) -> ISecureConn:
"""
Secure the connection, either locally or by communicating with opposing node via conn,
for an inbound connection (i.e. we are the initiator)
"""Secure the connection, either locally or by communicating with
opposing node via conn, for an inbound connection (i.e. we are the
initiator)
:return: secure connection object (that implements secure_conn_interface)
"""
transport = await self.select_transport(conn, True)
@ -78,9 +80,9 @@ class SecurityMultistream(ABC):
async def select_transport(
self, conn: IRawConnection, initiator: bool
) -> ISecureTransport:
"""
Select a transport that both us and the node on the
other end of conn support and agree on
"""Select a transport that both us and the node on the other end of
conn support and agree on.
:param conn: conn to choose a transport over
:param initiator: true if we are the initiator, false otherwise
:return: selected secure transport

29
libp2p/stream_muxer/abc.py
View File

@ -14,8 +14,8 @@ class IMuxedConn(ABC):
@abstractmethod
def __init__(self, conn: ISecureConn, peer_id: ID) -> None:
"""
create a new muxed connection
"""create a new muxed connection.
:param conn: an instance of secured connection
for new muxed streams
:param peer_id: peer_id of peer the connection is to
@ -28,29 +28,25 @@ class IMuxedConn(ABC):
@abstractmethod
async def close(self) -> None:
"""
close connection
"""
"""close connection."""
@abstractmethod
def is_closed(self) -> bool:
"""
check connection is fully closed
"""check connection is fully closed.
:return: true if successful
"""
@abstractmethod
async def open_stream(self) -> "IMuxedStream":
"""
creates a new muxed_stream
"""creates a new muxed_stream.
:return: a new ``IMuxedStream`` stream
"""
@abstractmethod
async def accept_stream(self) -> "IMuxedStream":
"""
accepts a muxed stream opened by the other end
"""
"""accepts a muxed stream opened by the other end."""
class IMuxedStream(ReadWriteCloser):
@ -59,14 +55,11 @@ class IMuxedStream(ReadWriteCloser):
@abstractmethod
async def reset(self) -> None:
"""
closes both ends of the stream
tells this remote side to hang up
"""
"""closes both ends of the stream tells this remote side to hang up."""
@abstractmethod
def set_deadline(self, ttl: int) -> bool:
"""
set deadline for muxed stream
"""set deadline for muxed stream.
:return: a new stream
"""

45
libp2p/stream_muxer/mplex/mplex.py
View File

@ -41,8 +41,8 @@ class Mplex(IMuxedConn):
_tasks: List["asyncio.Future[Any]"]
def __init__(self, secured_conn: ISecureConn, peer_id: ID) -> None:
"""
create a new muxed connection
"""create a new muxed connection.
:param secured_conn: an instance of ``ISecureConn``
:param generic_protocol_handler: generic protocol handler
for new muxed streams
@ -72,9 +72,7 @@ class Mplex(IMuxedConn):
return self.secured_conn.initiator
async def close(self) -> None:
"""
close the stream muxer and underlying secured connection
"""
"""close the stream muxer and underlying secured connection."""
if self.event_shutting_down.is_set():
return
# Set the `event_shutting_down`, to allow graceful shutdown.
@ -84,15 +82,15 @@ class Mplex(IMuxedConn):
await self.event_closed.wait()
def is_closed(self) -> bool:
"""
check connection is fully closed
"""check connection is fully closed.
:return: true if successful
"""
return self.event_closed.is_set()
def _get_next_channel_id(self) -> int:
"""
Get next available stream id
"""Get next available stream id.
:return: next available stream id for the connection
"""
next_id = self.next_channel_id
@ -106,8 +104,8 @@ class Mplex(IMuxedConn):
return stream
async def open_stream(self) -> IMuxedStream:
"""
creates a new muxed_stream
"""creates a new muxed_stream.
:return: a new ``MplexStream``
"""
channel_id = self._get_next_channel_id()
@ -135,9 +133,7 @@ class Mplex(IMuxedConn):
return task_coro.result()
async def accept_stream(self) -> IMuxedStream:
"""
accepts a muxed stream opened by the other end
"""
"""accepts a muxed stream opened by the other end."""
return await self._wait_until_shutting_down_or_closed(
self.new_stream_queue.get()
)
@ -145,8 +141,8 @@ class Mplex(IMuxedConn):
async def send_message(
self, flag: HeaderTags, data: Optional[bytes], stream_id: StreamID
) -> int:
"""
sends a message over the connection
"""sends a message over the connection.
:param header: header to use
:param data: data to send in the message
:param stream_id: stream the message is in
@ -164,8 +160,8 @@ class Mplex(IMuxedConn):
)
async def write_to_stream(self, _bytes: bytes) -> int:
"""
writes a byte array to a secured connection
"""writes a byte array to a secured connection.
:param _bytes: byte array to write
:return: length written
"""
@ -173,9 +169,8 @@ class Mplex(IMuxedConn):
return len(_bytes)
async def handle_incoming(self) -> None:
"""
Read a message off of the secured connection and add it to the corresponding message buffer
"""
"""Read a message off of the secured connection and add it to the
corresponding message buffer."""
while True:
try:
@ -189,8 +184,8 @@ class Mplex(IMuxedConn):
await self._cleanup()
async def read_message(self) -> Tuple[int, int, bytes]:
"""
Read a single message off of the secured connection
"""Read a single message off of the secured connection.
:return: stream_id, flag, message contents
"""
@ -215,8 +210,8 @@ class Mplex(IMuxedConn):
return channel_id, flag, message
async def _handle_incoming_message(self) -> None:
"""
Read and handle a new incoming message.
"""Read and handle a new incoming message.
:raise MplexUnavailable: `Mplex` encounters fatal error or is shutting down.
"""
channel_id, flag, message = await self._wait_until_shutting_down_or_closed(

39
libp2p/stream_muxer/mplex/mplex_stream.py
View File

@ -34,8 +34,8 @@ class MplexStream(IMuxedStream):
_buf: bytearray
def __init__(self, name: str, stream_id: StreamID, muxed_conn: "Mplex") -> None:
"""
create new MuxedStream in muxer
"""create new MuxedStream in muxer.
:param stream_id: stream id of this stream
:param muxed_conn: muxed connection of this muxed_stream
"""
@ -112,10 +112,10 @@ class MplexStream(IMuxedStream):
return bytes(payload)
async def read(self, n: int = -1) -> bytes:
"""
Read up to n bytes. Read possibly returns fewer than `n` bytes,
if there are not enough bytes in the Mplex buffer.
If `n == -1`, read until EOF.
"""Read up to n bytes. Read possibly returns fewer than `n` bytes, if
there are not enough bytes in the Mplex buffer. If `n == -1`, read
until EOF.
:param n: number of bytes to read
:return: bytes actually read
"""
@ -141,8 +141,8 @@ class MplexStream(IMuxedStream):
return bytes(payload)
async def write(self, data: bytes) -> int:
"""
write to stream
"""write to stream.
:return: number of bytes written
"""
if self.event_local_closed.is_set():
@ -155,10 +155,8 @@ class MplexStream(IMuxedStream):
return await self.muxed_conn.send_message(flag, data, self.stream_id)
async def close(self) -> None:
"""
Closing a stream closes it for writing and closes the remote end for reading
but allows writing in the other direction.
"""
"""Closing a stream closes it for writing and closes the remote end for
reading but allows writing in the other direction."""
# TODO error handling with timeout
async with self.close_lock:
@ -182,10 +180,7 @@ class MplexStream(IMuxedStream):
del self.muxed_conn.streams[self.stream_id]
async def reset(self) -> None:
"""
closes both ends of the stream
tells this remote side to hang up
"""
"""closes both ends of the stream tells this remote side to hang up."""
async with self.close_lock:
# Both sides have been closed. No need to event_reset.
if self.event_remote_closed.is_set() and self.event_local_closed.is_set():
@ -217,8 +212,8 @@ class MplexStream(IMuxedStream):
# TODO deadline not in use
def set_deadline(self, ttl: int) -> bool:
"""
set deadline for muxed stream
"""set deadline for muxed stream.
:return: True if successful
"""
self.read_deadline = ttl
@ -226,16 +221,16 @@ class MplexStream(IMuxedStream):
return True
def set_read_deadline(self, ttl: int) -> bool:
"""
set read deadline for muxed stream
"""set read deadline for muxed stream.
:return: True if successful
"""
self.read_deadline = ttl
return True
def set_write_deadline(self, ttl: int) -> bool:
"""
set write deadline for muxed stream
"""set write deadline for muxed stream.
:return: True if successful
"""
self.write_deadline = ttl

18
libp2p/stream_muxer/muxer_multistream.py
View File

@ -16,8 +16,8 @@ DEFAULT_NEGOTIATE_TIMEOUT = 60
class MuxerMultistream:
"""
MuxerMultistream is a multistream stream muxed transport multiplexer.
"""MuxerMultistream is a multistream stream muxed transport multiplexer.
go implementation: github.com/libp2p/go-stream-muxer-multistream/multistream.go
"""
@ -34,10 +34,10 @@ class MuxerMultistream:
self.add_transport(protocol, transport)
def add_transport(self, protocol: TProtocol, transport: TMuxerClass) -> None:
"""
Add a protocol and its corresponding transport to multistream-select(multiselect).
The order that a protocol is added is exactly the precedence it is negotiated in
multiselect.
"""Add a protocol and its corresponding transport to multistream-
select(multiselect). The order that a protocol is added is exactly the
precedence it is negotiated in multiselect.
:param protocol: the protocol name, which is negotiated in multiselect.
:param transport: the corresponding transportation to the ``protocol``.
"""
@ -48,9 +48,9 @@ class MuxerMultistream:
self.multiselect.add_handler(protocol, None)
async def select_transport(self, conn: IRawConnection) -> TMuxerClass:
"""
Select a transport that both us and the node on the
other end of conn support and agree on
"""Select a transport that both us and the node on the other end of
conn support and agree on.
:param conn: conn to choose a transport over
:return: selected muxer transport
"""

14
libp2p/transport/listener_interface.py
View File

@ -7,22 +7,20 @@ from multiaddr import Multiaddr
class IListener(ABC):
@abstractmethod
async def listen(self, maddr: Multiaddr) -> bool:
"""
put listener in listening mode and wait for incoming connections
"""put listener in listening mode and wait for incoming connections.
:param maddr: multiaddr of peer
:return: return True if successful
"""
@abstractmethod
def get_addrs(self) -> List[Multiaddr]:
"""
retrieve list of addresses the listener is listening on
"""retrieve list of addresses the listener is listening on.
:return: return list of addrs
"""
@abstractmethod
async def close(self) -> None:
"""
close the listener such that no more connections
can be open on this transport instance
"""
"""close the listener such that no more connections can be open on this
transport instance."""

24
libp2p/transport/tcp/tcp.py
View File

@ -22,8 +22,8 @@ class TCPListener(IListener):
self.handler = handler_function
async def listen(self, maddr: Multiaddr) -> bool:
"""
put listener in listening mode and wait for incoming connections
"""put listener in listening mode and wait for incoming connections.
:param maddr: maddr of peer
:return: return True if successful
"""
@ -38,18 +38,16 @@ class TCPListener(IListener):
return True
def get_addrs(self) -> List[Multiaddr]:
"""
retrieve list of addresses the listener is listening on
"""retrieve list of addresses the listener is listening on.
:return: return list of addrs
"""
# TODO check if server is listening
return self.multiaddrs
async def close(self) -> None:
"""
close the listener such that no more connections
can be open on this transport instance
"""
"""close the listener such that no more connections can be open on this
transport instance."""
if self.server is None:
return
self.server.close()
@ -59,8 +57,8 @@ class TCPListener(IListener):
class TCP(ITransport):
async def dial(self, maddr: Multiaddr) -> IRawConnection:
"""
dial a transport to peer listening on multiaddr
"""dial a transport to peer listening on multiaddr.
:param maddr: multiaddr of peer
:return: `RawConnection` if successful
:raise OpenConnectionError: raised when failed to open connection
@ -76,10 +74,10 @@ class TCP(ITransport):
return RawConnection(reader, writer, True)
def create_listener(self, handler_function: THandler) -> TCPListener:
"""
create listener on transport
"""create listener on transport.
:param handler_function: a function called when a new connection is received
that takes a connection as argument which implements interface-connection
that takes a connection as argument which implements interface-connection
:return: a listener object that implements listener_interface.py
"""
return TCPListener(handler_function)

10
libp2p/transport/transport_interface.py
View File

@ -11,8 +11,8 @@ from .typing import THandler
class ITransport(ABC):
@abstractmethod
async def dial(self, maddr: Multiaddr) -> IRawConnection:
"""
dial a transport to peer listening on multiaddr
"""dial a transport to peer listening on multiaddr.
:param multiaddr: multiaddr of peer
:param self_id: peer_id of the dialer (to send to receiver)
:return: list of multiaddrs
@ -20,9 +20,9 @@ class ITransport(ABC):
@abstractmethod
def create_listener(self, handler_function: THandler) -> IListener:
"""
create listener on transport
"""create listener on transport.
:param handler_function: a function called when a new conntion is received
that takes a connection as argument which implements interface-connection
that takes a connection as argument which implements interface-connection
:return: a listener object that implements listener_interface.py
"""

12
libp2p/transport/upgrader.py
View File

@ -26,18 +26,14 @@ class TransportUpgrader:
self.muxer_multistream = MuxerMultistream(muxer_transports_by_protocol)
def upgrade_listener(self, transport: ITransport, listeners: IListener) -> None:
"""
Upgrade multiaddr listeners to libp2p-transport listeners
"""
"""Upgrade multiaddr listeners to libp2p-transport listeners."""
# TODO: Figure out what to do with this function.
pass
async def upgrade_security(
self, raw_conn: IRawConnection, peer_id: ID, initiator: bool
) -> ISecureConn:
"""
Upgrade conn to a secured connection
"""
"""Upgrade conn to a secured connection."""
try:
if initiator:
return await self.security_multistream.secure_outbound(
@ -54,9 +50,7 @@ class TransportUpgrader:
) from error
async def upgrade_connection(self, conn: ISecureConn, peer_id: ID) -> IMuxedConn:
"""
Upgrade secured connection to a muxed connection
"""
"""Upgrade secured connection to a muxed connection."""
try:
return await self.muxer_multistream.new_conn(conn, peer_id)
except (MultiselectError, MultiselectClientError) as error:

6
libp2p/utils.py
View File

@ -19,7 +19,7 @@ SHIFT_64_BIT_MAX = int(math.ceil(64 / 7)) * 7
def encode_uvarint(number: int) -> bytes:
"""Pack `number` into varint bytes"""
"""Pack `number` into varint bytes."""
buf = b""
while True:
towrite = number & 0x7F
@ -33,9 +33,7 @@ def encode_uvarint(number: int) -> bytes:
async def decode_uvarint_from_stream(reader: Reader) -> int:
"""
https://en.wikipedia.org/wiki/LEB128
"""
"""https://en.wikipedia.org/wiki/LEB128."""
res = 0
for shift in itertools.count(0, 7):
if shift > SHIFT_64_BIT_MAX:

2
setup.py
View File

@ -16,7 +16,7 @@ extras_require = {
"isort==4.3.21",
"flake8>=3.7.7,<4.0.0",
],
"dev": ["tox>=3.13.2,<4.0.0"],
"dev": ["tox>=3.13.2,<4.0.0", "docformatter"],
}
extras_require["dev"] = (

1
tests/factories.py
View File

@ -2,7 +2,6 @@ import asyncio
from typing import Dict, Tuple
import factory
from libp2p import generate_new_rsa_identity, initialize_default_swarm
from libp2p.crypto.keys import KeyPair
from libp2p.host.basic_host import BasicHost

5
tests/network/test_notify.py
View File

@ -1,6 +1,5 @@
"""
Test Notify and Notifee by ensuring that the proper events get
called, and that the stream passed into opened_stream is correct
"""Test Notify and Notifee by ensuring that the proper events get called, and
that the stream passed into opened_stream is correct.
Note: Listen event does not get hit because MyNotifee is passed
into network after network has already started listening

46
tests/pubsub/dummy_account_node.py
View File

@ -20,10 +20,11 @@ CRYPTO_TOPIC = "ethereum"
class DummyAccountNode:
"""
Node which has an internal balance mapping, meant to serve as
a dummy crypto blockchain. There is no actual blockchain, just a simple
map indicating how much crypto each user in the mappings holds
"""Node which has an internal balance mapping, meant to serve as a dummy
crypto blockchain.
There is no actual blockchain, just a simple map indicating how much
crypto each user in the mappings holds
"""
libp2p_node: IHost
@ -40,9 +41,8 @@ class DummyAccountNode:
@classmethod
async def create(cls):
"""
Create a new DummyAccountNode and attach a libp2p node, a floodsub, and a pubsub
instance to this new node
"""Create a new DummyAccountNode and attach a libp2p node, a floodsub,
and a pubsub instance to this new node.
We use create as this serves as a factory function and allows us
to use async await, unlike the init function
@ -53,9 +53,7 @@ class DummyAccountNode:
return cls(libp2p_node=pubsub.host, pubsub=pubsub, floodsub=pubsub.router)
async def handle_incoming_msgs(self):
"""
Handle all incoming messages on the CRYPTO_TOPIC from peers
"""
"""Handle all incoming messages on the CRYPTO_TOPIC from peers."""
while True:
incoming = await self.q.get()
msg_comps = incoming.data.decode("utf-8").split(",")
@ -66,17 +64,16 @@ class DummyAccountNode:
self.handle_set_crypto(msg_comps[1], int(msg_comps[2]))
async def setup_crypto_networking(self):
"""
Subscribe to CRYPTO_TOPIC and perform call to function that handles
all incoming messages on said topic
"""
"""Subscribe to CRYPTO_TOPIC and perform call to function that handles
all incoming messages on said topic."""
self.q = await self.pubsub.subscribe(CRYPTO_TOPIC)
asyncio.ensure_future(self.handle_incoming_msgs())
async def publish_send_crypto(self, source_user, dest_user, amount):
"""
Create a send crypto message and publish that message to all other nodes
"""Create a send crypto message and publish that message to all other
nodes.
:param source_user: user to send crypto from
:param dest_user: user to send crypto to
:param amount: amount of crypto to send
@ -85,8 +82,9 @@ class DummyAccountNode:
await self.pubsub.publish(CRYPTO_TOPIC, msg_contents.encode())
async def publish_set_crypto(self, user, amount):
"""
Create a set crypto message and publish that message to all other nodes
"""Create a set crypto message and publish that message to all other
nodes.
:param user: user to set crypto for
:param amount: amount of crypto
"""
@ -94,8 +92,8 @@ class DummyAccountNode:
await self.pubsub.publish(CRYPTO_TOPIC, msg_contents.encode())
def handle_send_crypto(self, source_user, dest_user, amount):
"""
Handle incoming send_crypto message
"""Handle incoming send_crypto message.
:param source_user: user to send crypto from
:param dest_user: user to send crypto to
:param amount: amount of crypto to send
@ -111,16 +109,16 @@ class DummyAccountNode:
self.balances[dest_user] = amount
def handle_set_crypto(self, dest_user, amount):
"""
Handle incoming set_crypto message
"""Handle incoming set_crypto message.
:param dest_user: user to set crypto for
:param amount: amount of crypto
"""
self.balances[dest_user] = amount
def get_balance(self, user):
"""
Get balance in crypto for a particular user
"""Get balance in crypto for a particular user.
:param user: user to get balance for
:return: balance of user
"""

6
tests/pubsub/test_dummyaccount_demo.py
View File

@ -16,9 +16,9 @@ def create_setup_in_new_thread_func(dummy_node):
async def perform_test(num_nodes, adjacency_map, action_func, assertion_func):
"""
Helper function to allow for easy construction of custom tests for dummy account nodes
in various network topologies
"""Helper function to allow for easy construction of custom tests for dummy
account nodes in various network topologies.
:param num_nodes: number of nodes in the test
:param adjacency_map: adjacency map defining each node and its list of neighbors
:param action_func: function to execute that includes actions by the nodes,

4
tests/pubsub/utils.py
View File

@ -7,8 +7,8 @@ from tests.utils import connect
def message_id_generator(start_val):
"""
Generate a unique message id
"""Generate a unique message id.
:param start_val: value to start generating messages at
:return: message id
"""

4
tests/utils.py
View File

@ -21,9 +21,7 @@ async def connect_swarm(swarm_0, swarm_1):
async def connect(node1, node2):
"""
Connect node1 to node2
"""
"""Connect node1 to node2."""
addr = node2.get_addrs()[0]
info = info_from_p2p_addr(addr)
await node1.connect(info)

7
tests_interop/daemon.py
View File

@ -19,9 +19,10 @@ TIMEOUT_DURATION = 30
async def try_until_success(coro_func, timeout=TIMEOUT_DURATION):
"""
Keep running ``coro_func`` until either it succeed or time is up.
All arguments of ``coro_func`` should be filled, i.e. it should be called without arguments.
"""Keep running ``coro_func`` until either it succeed or time is up.
All arguments of ``coro_func`` should be filled, i.e. it should be
called without arguments.
"""
t_start = time.monotonic()
while True: