293 lines
No EOL
10 KiB
Python
293 lines
No EOL
10 KiB
Python
import json
|
|
import time
|
|
from typing import Any, Awaitable, Callable, List, Optional, Tuple
|
|
|
|
from fastapi import WebSocket
|
|
from loguru import logger
|
|
|
|
from .crud import (
|
|
create_event,
|
|
delete_events,
|
|
get_config_for_all_active_relays,
|
|
get_event,
|
|
get_events,
|
|
get_prunable_events,
|
|
get_storage_for_public_key,
|
|
mark_events_deleted,
|
|
prune_old_events,
|
|
)
|
|
from .models import ClientConfig, NostrEvent, NostrEventType, NostrFilter, RelayConfig
|
|
|
|
|
|
class NostrClientManager:
|
|
def __init__(self: "NostrClientManager"):
|
|
self._clients: dict = {}
|
|
self._active_relays: dict = {}
|
|
self._is_ready = False
|
|
|
|
async def add_client(self, c: "NostrClientConnection") -> bool:
|
|
if not self._is_ready:
|
|
await self.init_relays()
|
|
|
|
if not (await self._allow_client(c)):
|
|
return False
|
|
|
|
self._set_client_callbacks(c)
|
|
self.clients(c.relay_id).append(c)
|
|
|
|
return True
|
|
|
|
|
|
def remove_client(self, c: "NostrClientConnection"):
|
|
self.clients(c.relay_id).remove(c)
|
|
|
|
async def broadcast_event(self, source: "NostrClientConnection", event: NostrEvent):
|
|
for client in self.clients(source.relay_id):
|
|
await client.notify_event(event)
|
|
|
|
async def init_relays(self):
|
|
self._active_relays = await get_config_for_all_active_relays()
|
|
self._is_ready = True
|
|
|
|
async def enable_relay(self, relay_id: str, config: RelayConfig):
|
|
self._is_ready = True
|
|
self._active_relays[relay_id] = config
|
|
|
|
async def disable_relay(self, relay_id: str):
|
|
await self._stop_clients_for_relay(relay_id)
|
|
if relay_id in self._active_relays:
|
|
del self._active_relays[relay_id]
|
|
|
|
def get_relay_config(self, relay_id: str) -> RelayConfig:
|
|
return self._active_relays[relay_id]
|
|
|
|
def clients(self, relay_id: str) -> List["NostrClientConnection"]:
|
|
if relay_id not in self._clients:
|
|
self._clients[relay_id] = []
|
|
return self._clients[relay_id]
|
|
|
|
async def _stop_clients_for_relay(self, relay_id: str):
|
|
for client in self.clients(relay_id):
|
|
if client.relay_id == relay_id:
|
|
await client.stop(reason=f"Relay '{relay_id}' has been deactivated.")
|
|
|
|
async def _allow_client(self, c: "NostrClientConnection") -> bool:
|
|
if c.relay_id not in self._active_relays:
|
|
await c.stop(reason=f"Relay '{c.relay_id}' is not active")
|
|
return False
|
|
#todo: NIP-42: AUTH
|
|
return True
|
|
|
|
def _set_client_callbacks(self, client):
|
|
setattr(client, "broadcast_event", self.broadcast_event)
|
|
def get_client_config() -> ClientConfig:
|
|
return self.get_relay_config(client.relay_id)
|
|
setattr(client, "get_client_config", get_client_config)
|
|
|
|
class NostrClientConnection:
|
|
|
|
def __init__(self, relay_id: str, websocket: WebSocket):
|
|
self.websocket = websocket
|
|
self.relay_id = relay_id
|
|
self.filters: List[NostrFilter] = []
|
|
self.broadcast_event: Optional[Callable[[NostrClientConnection, NostrEvent], Awaitable[None]]] = None
|
|
self.get_client_config: Optional[Callable[[], ClientConfig]] = None
|
|
|
|
self._last_event_timestamp = 0 # in seconds
|
|
self._event_count_per_timestamp = 0
|
|
|
|
async def start(self):
|
|
await self.websocket.accept()
|
|
while True:
|
|
json_data = await self.websocket.receive_text()
|
|
try:
|
|
data = json.loads(json_data)
|
|
|
|
resp = await self._handle_message(data)
|
|
for r in resp:
|
|
await self._send_msg(r)
|
|
except Exception as e:
|
|
logger.warning(e)
|
|
|
|
async def stop(self, reason: Optional[str]):
|
|
message = reason if reason else "Server closed webocket"
|
|
try:
|
|
await self._send_msg(["NOTICE", message])
|
|
except:
|
|
pass
|
|
|
|
try:
|
|
await self.websocket.close(reason=reason)
|
|
except:
|
|
pass
|
|
|
|
async def notify_event(self, event: NostrEvent) -> bool:
|
|
for filter in self.filters:
|
|
if filter.matches(event):
|
|
resp = event.serialize_response(filter.subscription_id)
|
|
await self._send_msg(resp)
|
|
return True
|
|
return False
|
|
|
|
async def _broadcast_event(self, e: NostrEvent):
|
|
if self.broadcast_event:
|
|
await self.broadcast_event(self, e)
|
|
|
|
async def _handle_message(self, data: List) -> List:
|
|
if len(data) < 2:
|
|
return []
|
|
|
|
message_type = data[0]
|
|
if message_type == NostrEventType.EVENT:
|
|
await self._handle_event(NostrEvent.parse_obj(data[1]))
|
|
return []
|
|
if message_type == NostrEventType.REQ:
|
|
if len(data) != 3:
|
|
return []
|
|
return await self._handle_request(data[1], NostrFilter.parse_obj(data[2]))
|
|
if message_type == NostrEventType.CLOSE:
|
|
self._handle_close(data[1])
|
|
|
|
return []
|
|
|
|
async def _handle_event(self, e: NostrEvent):
|
|
resp_nip20: List[Any] = ["OK", e.id]
|
|
|
|
valid, message = self._validate_event(e)
|
|
if not valid:
|
|
resp_nip20 + [valid, message]
|
|
await self._send_msg(resp_nip20)
|
|
return None
|
|
|
|
valid, message = await self._validate_storage(e)
|
|
if not valid:
|
|
resp_nip20 += [valid, message]
|
|
await self._send_msg(resp_nip20)
|
|
return None
|
|
|
|
try:
|
|
if e.is_replaceable_event():
|
|
await delete_events(
|
|
self.relay_id, NostrFilter(kinds=[e.kind], authors=[e.pubkey])
|
|
)
|
|
await create_event(self.relay_id, e)
|
|
await self._broadcast_event(e)
|
|
|
|
if e.is_delete_event():
|
|
await self._handle_delete_event(e)
|
|
resp_nip20 += [True, ""]
|
|
except Exception as ex:
|
|
logger.debug(ex)
|
|
event = await get_event(self.relay_id, e.id)
|
|
# todo: handle NIP20 in detail
|
|
message = "error: failed to create event"
|
|
resp_nip20 += [event != None, message]
|
|
|
|
await self._send_msg(resp_nip20)
|
|
|
|
|
|
@property
|
|
def client_config(self) -> ClientConfig:
|
|
if not self.get_client_config:
|
|
raise Exception("Client not ready!")
|
|
return self.get_client_config()
|
|
|
|
async def _send_msg(self, data: List):
|
|
await self.websocket.send_text(json.dumps(data))
|
|
|
|
async def _handle_delete_event(self, event: NostrEvent):
|
|
# NIP 09
|
|
filter = NostrFilter(authors=[event.pubkey])
|
|
filter.ids = [t[1] for t in event.tags if t[0] == "e"]
|
|
events_to_delete = await get_events(self.relay_id, filter, False)
|
|
ids = [e.id for e in events_to_delete if not e.is_delete_event()]
|
|
await mark_events_deleted(self.relay_id, NostrFilter(ids=ids))
|
|
|
|
async def _handle_request(self, subscription_id: str, filter: NostrFilter) -> List:
|
|
filter.subscription_id = subscription_id
|
|
self._remove_filter(subscription_id)
|
|
if self._can_add_filter():
|
|
return [["NOTICE", f"Maximum number of filters ({self.client_config.max_client_filters}) exceeded."]]
|
|
|
|
filter.enforce_limit(self.client_config.limit_per_filter)
|
|
self.filters.append(filter)
|
|
events = await get_events(self.relay_id, filter)
|
|
serialized_events = [
|
|
event.serialize_response(subscription_id) for event in events
|
|
]
|
|
resp_nip15 = ["EOSE", subscription_id]
|
|
serialized_events.append(resp_nip15)
|
|
return serialized_events
|
|
|
|
def _remove_filter(self, subscription_id: str):
|
|
self.filters = [f for f in self.filters if f.subscription_id != subscription_id]
|
|
|
|
def _handle_close(self, subscription_id: str):
|
|
self._remove_filter(subscription_id)
|
|
|
|
def _can_add_filter(self) -> bool:
|
|
return self.client_config.max_client_filters != 0 and len(self.filters) >= self.client_config.max_client_filters
|
|
|
|
def _validate_event(self, e: NostrEvent)-> Tuple[bool, str]:
|
|
if self._exceeded_max_events_per_second():
|
|
return False, f"Exceeded max events per second limit'!"
|
|
|
|
if not self.client_config.is_author_allowed(e.pubkey):
|
|
return False, f"Public key '{e.pubkey}' is not allowed in relay '{self.relay_id}'!"
|
|
|
|
try:
|
|
e.check_signature()
|
|
except ValueError:
|
|
return False, "invalid: wrong event `id` or `sig`"
|
|
|
|
in_range, message = self._created_at_in_range(e.created_at)
|
|
if not in_range:
|
|
return False, message
|
|
|
|
return True, ""
|
|
|
|
async def _validate_storage(self, e: NostrEvent) -> Tuple[bool, str]:
|
|
if self.client_config.free_storage_value == 0:
|
|
if not self.client_config.is_paid_relay:
|
|
return False, "Cannot write event, relay is read-only"
|
|
# todo: handeld paid paid plan
|
|
return True, "Temp OK"
|
|
|
|
|
|
stored_bytes = await get_storage_for_public_key(self.relay_id, e.pubkey)
|
|
if self.client_config.is_paid_relay:
|
|
# todo: handeld paid paid plan
|
|
return True, "Temp OK"
|
|
|
|
if (stored_bytes + e.size_bytes) <= self.client_config.free_storage_bytes_value:
|
|
return True, ""
|
|
|
|
if self.client_config.full_storage_action == "block":
|
|
return False, f"Cannot write event, no more storage available for public key: '{e.pubkey}'"
|
|
|
|
await prune_old_events(self.relay_id, e.pubkey, e.size_bytes)
|
|
|
|
return True, ""
|
|
|
|
def _exceeded_max_events_per_second(self) -> bool:
|
|
if self.client_config.max_events_per_second == 0:
|
|
return False
|
|
|
|
current_time = round(time.time())
|
|
if self._last_event_timestamp == current_time:
|
|
self._event_count_per_timestamp += 1
|
|
else:
|
|
self._last_event_timestamp = current_time
|
|
self._event_count_per_timestamp = 0
|
|
|
|
return self._event_count_per_timestamp > self.client_config.max_events_per_second
|
|
|
|
def _created_at_in_range(self, created_at: int) -> Tuple[bool, str]:
|
|
current_time = round(time.time())
|
|
if self.client_config.created_at_in_past != 0:
|
|
if created_at < (current_time - self.client_config.created_at_in_past):
|
|
return False, "created_at is too much into the past"
|
|
if self.client_config.created_at_in_future != 0:
|
|
if created_at > (current_time + self.client_config.created_at_in_future):
|
|
return False, "created_at is too much into the future"
|
|
return True, "" |