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python-nostr's Introduction

python-nostr

A Python library for making Nostr clients

Usage

Generate a key

from nostr.key import PrivateKey

private_key = PrivateKey()
public_key = private_key.public_key
print(f"Private key: {private_key.bech32()}")
print(f"Public key: {public_key.bech32()}")

Connect to relays

import json
import ssl
import time
from nostr.relay_manager import RelayManager

relay_manager = RelayManager()
relay_manager.add_relay("wss://nostr-pub.wellorder.net")
relay_manager.add_relay("wss://relay.damus.io")
relay_manager.open_connections({"cert_reqs": ssl.CERT_NONE}) # NOTE: This disables ssl certificate verification
time.sleep(1.25) # allow the connections to open

while relay_manager.message_pool.has_notices():
  notice_msg = relay_manager.message_pool.get_notice()
  print(notice_msg.content)

relay_manager.close_connections()

Publish to relays

import json
import ssl
import time
from nostr.event import Event
from nostr.relay_manager import RelayManager
from nostr.message_type import ClientMessageType
from nostr.key import PrivateKey

relay_manager = RelayManager()
relay_manager.add_relay("wss://nostr-pub.wellorder.net")
relay_manager.add_relay("wss://relay.damus.io")
relay_manager.open_connections({"cert_reqs": ssl.CERT_NONE}) # NOTE: This disables ssl certificate verification
time.sleep(1.25) # allow the connections to open

private_key = PrivateKey()

event = Event(private_key.public_key.hex(), "Hello Nostr")
event.sign(private_key.hex())

message = json.dumps([ClientMessageType.EVENT, event.to_json_object()])
relay_manager.publish_message(message)
time.sleep(1) # allow the messages to send

relay_manager.close_connections()

Receive events from relays

import json
import ssl
import time
from nostr.filter import Filter, Filters
from nostr.event import Event, EventKind
from nostr.relay_manager import RelayManager
from nostr.message_type import ClientMessageType

filters = Filters([Filter(authors=[<a nostr pubkey in hex>], kinds=[EventKind.TEXT_NOTE])])
subscription_id = <a string to identify a subscription>
request = [ClientMessageType.REQUEST, subscription_id]
request.extend(filters.to_json_array())

relay_manager = RelayManager()
relay_manager.add_relay("wss://nostr-pub.wellorder.net")
relay_manager.add_relay("wss://relay.damus.io")
relay_manager.add_subscription(subscription_id, filters)
relay_manager.open_connections({"cert_reqs": ssl.CERT_NONE}) # NOTE: This disables ssl certificate verification
time.sleep(1.25) # allow the connections to open

message = json.dumps(request)
relay_manager.publish_message(message)
time.sleep(1) # allow the messages to send

while relay_manager.message_pool.has_events():
  event_msg = relay_manager.message_pool.get_event()
  print(event_msg.event.content)

relay_manager.close_connections()

Installation

pip install nostr

Note: I wrote this with Python 3.9.5.

Running tests

Install tox

pip install tox

Run tests

tox

Disclaimer

  • This library is in very early development.
  • It might have some bugs.
  • I need to add more tests.

Please feel free to add issues, add PRs, or provide any feedback!

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