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https://github.com/jeffthibault/python-nostr

A Python library for Nostr
https://github.com/jeffthibault/python-nostr

nostr python

Last synced: 3 months ago
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A Python library for Nostr

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README 

        
# python-nostr

A Python library for making [Nostr](https://github.com/nostr-protocol/nostr) clients



## Usage

**Generate a key**

```python

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**

```python

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**

```python

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("Hello Nostr")

private_key.sign_event(event)



relay_manager.publish_event(event)

time.sleep(1) # allow the messages to send



relay_manager.close_connections()

```



**Reply to a note**

```python

from nostr.event import Event



reply = Event(

  content="Hey, that's a great point!",

)



# create 'e' tag reference to the note you're replying to

reply.add_event_ref(original_note_id)



# create 'p' tag reference to the pubkey you're replying to

reply.add_pubkey_ref(original_note_author_pubkey)



private_key.sign_event(reply)

relay_manager.publish_event(reply)

```



**Send a DM**

```python

from nostr.event import EncryptedDirectMessage



dm = EncryptedDirectMessage(

  recipient_pubkey=recipient_pubkey,

  cleartext_content="Secret message!"

)

private_key.sign_event(dm)

relay_manager.publish_event(dm)

```



**Receive events from relays**

```python

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=[], kinds=[EventKind.TEXT_NOTE])])

subscription_id = 

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()

```



**NIP-26 delegation**

```python

from nostr.delegation import Delegation

from nostr.event import EventKind, Event

from nostr.key import PrivateKey



# Load your "identity" PK that you'd like to keep safely offline

identity_pk = PrivateKey.from_nsec("nsec1...")



# Create a new, disposable PK as the "delegatee" that can be "hot" in a Nostr client

delegatee_pk = PrivateKey()



# the "identity" PK will authorize "delegatee" to sign TEXT_NOTEs on its behalf for the next month

delegation = Delegation(

    delegator_pubkey=identity_pk.public_key.hex(),

    delegatee_pubkey=delegatee_pk.public_key.hex(),

    event_kind=EventKind.TEXT_NOTE,

    duration_secs=30*24*60*60

)



identity_pk.sign_delegation(delegation)



event = Event(

    "Hello, NIP-26!",

    tags=[delegation.get_tag()],

)

delegatee_pk.sign_event(event)



# ...normal broadcast steps...

```



The resulting delegation tag can be stored as plaintext and reused as-is by the "delegatee" PK until the delegation token expires. There is no way to revoke a signed delegation, so current best practice is to keep the expiration time relatively short.



Hopefully clients will include an optional field to store the delegation tag. That would allow the "delegatee" PK to seamlessly post messages on the "identity" key's behalf, while the "identity" key stays safely offline in cold storage.



## Installation

```bash

pip install nostr

```



Note: I wrote this with Python 3.9.5.



## Test Suite

See the [Test Suite README](test/README.md)



## 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!