I don't have enough knowledge to know if this correct but I asked GPT4 the following:

"Give me code for a Nostr client using the information below ......" I then copied and pasted the NIP-01 documentation from this page: https://github.com/nostr-protocol/nips/blob/master/01.md

It replied with this:

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Here's a Python implementation of a Nostr client based on the information you provided:

"import json

import hashlib

import websocket

from typing import List, Dict, Union

class NostrClient:

def __init__(self, url: str):

self.url = url

self.ws = websocket.WebSocket()

def connect(self):

self.ws.connect(self.url)

def disconnect(self):

self.ws.close()

def publish_event(self, event: Dict[str, Union[str, int, List[List[str]]]]):

self.ws.send(json.dumps(["EVENT", event]))

def request_events(self, subscription_id: str, filters: List[Dict[str, Union[int, List[str]]]]):

self.ws.send(json.dumps(["REQ", subscription_id, *filters]))

def close_subscription(self, subscription_id: str):

self.ws.send(json.dumps(["CLOSE", subscription_id]))

def receive_message(self) -> List[Union[str, Dict[str, Union[str, int, List[List[str]]]]]]:

return json.loads(self.ws.recv())

def sha256_hex(data: str) -> str:

return hashlib.sha256(data.encode('utf-8')).hexdigest()

def serialize_event(event: Dict[str, Union[str, int, List[List[str]]]]) -> str:

serialized = [

0,

event["pubkey"],

event["created_at"],

event["kind"],

event["tags"],

event["content"]

]

return json.dumps(serialized, separators=(',', ':'))

def create_event_id(event: Dict[str, Union[str, int, List[List[str]]]]) -> str:

serialized = serialize_event(event)

return sha256_hex(serialized)

def sign_event(event: Dict[str, Union[str, int, List[List[str]]]], private_key: bytes):

# Implement your own signing function here.

pass

This code provides a basic NostrClient class to connect to a Nostr relay, send and receive messages as described in the NIP-01 protocol. You can create an instance of this class and connect to a relay by providing the relay URL, and then use the publish_event, request_events, and close_subscription methods to interact with the relay.

Note that the sign_event function is a placeholder for signing the event using the secp256k1 curve and Schnorr signatures, which should be implemented according to your specific requirements.

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