nostrdvm/utils/nostr_utils.py
2023-11-27 10:35:58 +01:00

100 lines
3.3 KiB
Python

import json
import typing
from datetime import timedelta
from nostr_sdk import Filter, Client, Alphabet, EventId, Event, PublicKey, Tag, Keys, nip04_decrypt, EventBuilder
def get_event_by_id(event_id: str, client: Client, config=None) -> Event | None:
split = event_id.split(":")
if len(split) == 3:
pk = PublicKey.from_hex(split[1])
id_filter = Filter().author(pk).custom_tag(Alphabet.D, [split[2]])
events = client.get_events_of([id_filter], timedelta(seconds=config.RELAY_TIMEOUT))
else:
if str(event_id).startswith('note'):
event_id = EventId.from_bech32(event_id)
else:
event_id = EventId.from_hex(event_id)
id_filter = Filter().id(event_id).limit(1)
events = client.get_events_of([id_filter], timedelta(seconds=config.RELAY_TIMEOUT))
if len(events) > 0:
return events[0]
else:
return None
def get_referenced_event_by_id(event_id, client, dvm_config, kinds) -> Event | None:
if kinds is None:
kinds = []
if len(kinds) > 0:
job_id_filter = Filter().kinds(kinds).event(EventId.from_hex(event_id)).limit(1)
else:
job_id_filter = Filter().event(EventId.from_hex(event_id)).limit(1)
events = client.get_events_of([job_id_filter], timedelta(seconds=dvm_config.RELAY_TIMEOUT))
if len(events) > 0:
return events[0]
else:
return None
def send_event(event: Event, client: Client, dvm_config) -> EventId:
relays = []
for tag in event.tags():
if tag.as_vec()[0] == 'relays':
relays = tag.as_vec()[1].split(',')
for relay in relays:
if relay not in dvm_config.RELAY_LIST:
client.add_relay(relay)
event_id = client.send_event(event)
for relay in relays:
if relay not in dvm_config.RELAY_LIST:
client.remove_relay(relay)
return event_id
def check_and_decrypt_tags(event, dvm_config):
try:
tags = []
is_encrypted = False
p = ""
sender = event.pubkey()
for tag in event.tags():
if tag.as_vec()[0] == 'encrypted':
is_encrypted = True
elif tag.as_vec()[0] == 'p':
p = tag.as_vec()[1]
if is_encrypted:
if p != Keys.from_sk_str(dvm_config.PRIVATE_KEY).public_key().to_hex():
print("[" + dvm_config.NIP89.name + "] Task encrypted and not addressed to this DVM, "
"skipping..")
return None
elif p == Keys.from_sk_str(dvm_config.PRIVATE_KEY).public_key().to_hex():
print("encrypted")
#encrypted_tag = Tag.parse(["encrypted"])
#p_tag = Tag.parse(["p", p])
tags_str = nip04_decrypt(Keys.from_sk_str(dvm_config.PRIVATE_KEY).secret_key(),
event.pubkey(), event.content())
#TODO add outer p tag so it doesnt have to be sent twice
params = json.loads(tags_str)
eventasjson = json.loads(event.as_json())
eventasjson['tags'] = params
eventasjson['content'] = ""
event = Event.from_json(json.dumps(eventasjson))
print(event.as_json())
except Exception as e:
print(e)
return event