class FakeEvent:
event_id = attr.ib()
room_id = attr.ib()
auth_events = attr.ib()
type = "foo"
state_key = "foo"
internal_metadata = _EventInternalMetadata({})
def auth_event_ids(self):
return self.auth_events
def is_state(self):
return True
class EventBuilder:
"""A format independent event builder used to build up the event content
before signing the event.
(Note that while objects of this class are frozen, the
content/unsigned/internal_metadata fields are still mutable)
Attributes:
room_version: Version of the target room
room_id
type
sender
content
unsigned
internal_metadata
_state
_auth
_store
_clock
_hostname: The hostname of the server creating the event
_signing_key: The signing key to use to sign the event as the server
"""
_state = attr.ib(type=StateHandler)
_auth = attr.ib(type=Auth)
_store = attr.ib(type=DataStore)
_clock = attr.ib(type=Clock)
_hostname = attr.ib(type=str)
_signing_key = attr.ib(type=SigningKey)
room_version = attr.ib(type=RoomVersion)
room_id = attr.ib(type=str)
type = attr.ib(type=str)
sender = attr.ib(type=str)
content = attr.ib(default=attr.Factory(dict), type=JsonDict)
unsigned = attr.ib(default=attr.Factory(dict), type=JsonDict)
# These only exist on a subset of events, so they raise AttributeError if
# someone tries to get them when they don't exist.
_state_key = attr.ib(default=None, type=Optional[str])
_redacts = attr.ib(default=None, type=Optional[str])
_origin_server_ts = attr.ib(default=None, type=Optional[int])
internal_metadata = attr.ib(
default=attr.Factory(lambda: _EventInternalMetadata({})),
type=_EventInternalMetadata,
)
@property
def state_key(self):
if self._state_key is not None:
return self._state_key
raise AttributeError("state_key")
def is_state(self):
return self._state_key is not None
async def build(
self,
prev_event_ids: List[str],
auth_event_ids: Optional[List[str]],
) -> EventBase:
"""Transform into a fully signed and hashed event
Args:
prev_event_ids: The event IDs to use as the prev events
auth_event_ids: The event IDs to use as the auth events.
Should normally be set to None, which will cause them to be calculated
based on the room state at the prev_events.
Returns:
The signed and hashed event.
"""
if auth_event_ids is None:
state_ids = await self._state.get_current_state_ids(
self.room_id, prev_event_ids
)
auth_event_ids = self._auth.compute_auth_events(self, state_ids)
format_version = self.room_version.event_format
if format_version == EventFormatVersions.V1:
# The types of auth/prev events changes between event versions.
auth_events = await self._store.add_event_hashes(
auth_event_ids
) # type: Union[List[str], List[Tuple[str, Dict[str, str]]]]
prev_events = await self._store.add_event_hashes(
prev_event_ids
) # type: Union[List[str], List[Tuple[str, Dict[str, str]]]]
else:
auth_events = auth_event_ids
prev_events = prev_event_ids
old_depth = await self._store.get_max_depth_of(prev_event_ids)
depth = old_depth + 1
# we cap depth of generated events, to ensure that they are not
# rejected by other servers (and so that they can be persisted in
# the db)
depth = min(depth, MAX_DEPTH)
event_dict = {
"auth_events": auth_events,
"prev_events": prev_events,
"type": self.type,
"room_id": self.room_id,
"sender": self.sender,
"content": self.content,
"unsigned": self.unsigned,
"depth": depth,
"prev_state": [],
} # type: Dict[str, Any]
if self.is_state():
event_dict["state_key"] = self._state_key
if self._redacts is not None:
event_dict["redacts"] = self._redacts
if self._origin_server_ts is not None:
event_dict["origin_server_ts"] = self._origin_server_ts
return create_local_event_from_event_dict(
clock=self._clock,
hostname=self._hostname,
signing_key=self._signing_key,
room_version=self.room_version,
event_dict=event_dict,
internal_metadata_dict=self.internal_metadata.get_dict(),
)
class EventBuilder(object):
"""A format independent event builder used to build up the event content
before signing the event.
(Note that while objects of this class are frozen, the
content/unsigned/internal_metadata fields are still mutable)
Attributes:
room_version: Version of the target room
room_id (str)
type (str)
sender (str)
content (dict)
unsigned (dict)
internal_metadata (_EventInternalMetadata)
_state (StateHandler)
_auth (synapse.api.Auth)
_store (DataStore)
_clock (Clock)
_hostname (str): The hostname of the server creating the event
_signing_key: The signing key to use to sign the event as the server
"""
_state = attr.ib()
_auth = attr.ib()
_store = attr.ib()
_clock = attr.ib()
_hostname = attr.ib()
_signing_key = attr.ib()
room_version = attr.ib(type=RoomVersion)
room_id = attr.ib()
type = attr.ib()
sender = attr.ib()
content = attr.ib(default=attr.Factory(dict))
unsigned = attr.ib(default=attr.Factory(dict))
# These only exist on a subset of events, so they raise AttributeError if
# someone tries to get them when they don't exist.
_state_key = attr.ib(default=None)
_redacts = attr.ib(default=None)
_origin_server_ts = attr.ib(default=None)
internal_metadata = attr.ib(
default=attr.Factory(lambda: _EventInternalMetadata({})))
@property
def state_key(self):
if self._state_key is not None:
return self._state_key
raise AttributeError("state_key")
def is_state(self):
return self._state_key is not None
@defer.inlineCallbacks
def build(self, prev_event_ids):
"""Transform into a fully signed and hashed event
Args:
prev_event_ids (list[str]): The event IDs to use as the prev events
Returns:
Deferred[FrozenEvent]
"""
state_ids = yield self._state.get_current_state_ids(
self.room_id, prev_event_ids)
auth_ids = yield self._auth.compute_auth_events(self, state_ids)
format_version = self.room_version.event_format
if format_version == EventFormatVersions.V1:
auth_events = yield self._store.add_event_hashes(auth_ids)
prev_events = yield self._store.add_event_hashes(prev_event_ids)
else:
auth_events = auth_ids
prev_events = prev_event_ids
old_depth = yield self._store.get_max_depth_of(prev_event_ids)
depth = old_depth + 1
# we cap depth of generated events, to ensure that they are not
# rejected by other servers (and so that they can be persisted in
# the db)
depth = min(depth, MAX_DEPTH)
event_dict = {
"auth_events": auth_events,
"prev_events": prev_events,
"type": self.type,
"room_id": self.room_id,
"sender": self.sender,
"content": self.content,
"unsigned": self.unsigned,
"depth": depth,
"prev_state": [],
}
if self.is_state():
event_dict["state_key"] = self._state_key
if self._redacts is not None:
event_dict["redacts"] = self._redacts
if self._origin_server_ts is not None:
event_dict["origin_server_ts"] = self._origin_server_ts
return create_local_event_from_event_dict(
clock=self._clock,
hostname=self._hostname,
signing_key=self._signing_key,
room_version=self.room_version,
event_dict=event_dict,
internal_metadata_dict=self.internal_metadata.get_dict(),
)
class EventBuilder:
"""A format independent event builder used to build up the event content
before signing the event.
(Note that while objects of this class are frozen, the
content/unsigned/internal_metadata fields are still mutable)
Attributes:
room_version: Version of the target room
room_id
type
sender
content
unsigned
internal_metadata
_state
_auth
_store
_clock
_hostname: The hostname of the server creating the event
_signing_key: The signing key to use to sign the event as the server
"""
_state: StateHandler
_event_auth_handler: "EventAuthHandler"
_store: DataStore
_clock: Clock
_hostname: str
_signing_key: SigningKey
room_version: RoomVersion
room_id: str
type: str
sender: str
content: JsonDict = attr.Factory(dict)
unsigned: JsonDict = attr.Factory(dict)
# These only exist on a subset of events, so they raise AttributeError if
# someone tries to get them when they don't exist.
_state_key: Optional[str] = None
_redacts: Optional[str] = None
_origin_server_ts: Optional[int] = None
internal_metadata: _EventInternalMetadata = attr.Factory(
lambda: _EventInternalMetadata({}))
@property
def state_key(self) -> str:
if self._state_key is not None:
return self._state_key
raise AttributeError("state_key")
def is_state(self) -> bool:
return self._state_key is not None
async def build(
self,
prev_event_ids: List[str],
auth_event_ids: Optional[List[str]],
depth: Optional[int] = None,
) -> EventBase:
"""Transform into a fully signed and hashed event
Args:
prev_event_ids: The event IDs to use as the prev events
auth_event_ids: The event IDs to use as the auth events.
Should normally be set to None, which will cause them to be calculated
based on the room state at the prev_events.
depth: Override the depth used to order the event in the DAG.
Should normally be set to None, which will cause the depth to be calculated
based on the prev_events.
Returns:
The signed and hashed event.
"""
if auth_event_ids is None:
state_ids = await self._state.get_current_state_ids(
self.room_id, prev_event_ids)
auth_event_ids = self._event_auth_handler.compute_auth_events(
self, state_ids)
format_version = self.room_version.event_format
# The types of auth/prev events changes between event versions.
prev_events: Union[List[str], List[Tuple[str, Dict[str, str]]]]
auth_events: Union[List[str], List[Tuple[str, Dict[str, str]]]]
if format_version == EventFormatVersions.V1:
auth_events = await self._store.add_event_hashes(auth_event_ids)
prev_events = await self._store.add_event_hashes(prev_event_ids)
else:
auth_events = auth_event_ids
prev_events = prev_event_ids
# Otherwise, progress the depth as normal
if depth is None:
(
_,
most_recent_prev_event_depth,
) = await self._store.get_max_depth_of(prev_event_ids)
depth = most_recent_prev_event_depth + 1
# we cap depth of generated events, to ensure that they are not
# rejected by other servers (and so that they can be persisted in
# the db)
depth = min(depth, MAX_DEPTH)
event_dict: Dict[str, Any] = {
"auth_events": auth_events,
"prev_events": prev_events,
"type": self.type,
"room_id": self.room_id,
"sender": self.sender,
"content": self.content,
"unsigned": self.unsigned,
"depth": depth,
"prev_state": [],
}
if self.is_state():
event_dict["state_key"] = self._state_key
if self._redacts is not None:
event_dict["redacts"] = self._redacts
if self._origin_server_ts is not None:
event_dict["origin_server_ts"] = self._origin_server_ts
return create_local_event_from_event_dict(
clock=self._clock,
hostname=self._hostname,
signing_key=self._signing_key,
room_version=self.room_version,
event_dict=event_dict,
internal_metadata_dict=self.internal_metadata.get_dict(),
)
