python-nostr/README.md

python-nostr

A Python library for making Nostr clients

Usage

Generate a key

from nostr.key import generate_private_key, get_public_key

private_key = generate_private_key()
public_key = get_public_key(private_key)

Connect to relays

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 time
from nostr.event import Event
from nostr.relay_manager import RelayManager
from nostr.message_type import ClientMessageType
from nostr.key import generate_private_key, get_public_key

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 = generate_private_key()
public_key = get_public_key(private_key)

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

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 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
from nostr.key import generate_private_key, get_public_key

filters = Filters([Filter(authors=[<a nostr pubkey in hex>], kinds=[EventKind.TEXT_NOTE])])
subscription_id = <a string to represent 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

1. Clone repository
   git clone https://github.com/jeffthibault/python-nostr.git
2. Install dependencies in repo
   python -m venv venv
pip install -r requirements.txt

Note: If the pip install fails, you might need to install wheel. Try pip install wheel then pip install -r requirements.txt

Dependencies

• websocket-client for websocket operations
• secp256k1 for key generation, signing, and verifying
• cryptography for encrypting and decrypting direct messages

Note: I wrote this with Python 3.9.5.

Disclaimer

• This library is in very early development and still a WIP.
• It might have some bugs.
• I need to add tests.
• I will try to publish this as a PyPI package at some point.

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