mirror of
https://github.com/aljazceru/python-nostr.git
synced 2025-12-19 15:24:19 +01:00
61 lines
2.0 KiB
Python
61 lines
2.0 KiB
Python
import time
|
|
import json
|
|
from enum import IntEnum
|
|
from secp256k1 import PrivateKey, PublicKey
|
|
from hashlib import sha256
|
|
|
|
class EventKind(IntEnum):
|
|
SET_METADATA = 0
|
|
TEXT_NOTE = 1
|
|
RECOMMEND_RELAY = 2
|
|
CONTACTS = 3
|
|
ENCRYPTED_DIRECT_MESSAGE = 4
|
|
DELETE = 5
|
|
|
|
class Event():
|
|
def __init__(
|
|
self,
|
|
public_key: str,
|
|
content: str,
|
|
created_at: int=int(time.time()),
|
|
kind: int=EventKind.TEXT_NOTE,
|
|
tags: "list[list[str]]"=[],
|
|
id: str=None,
|
|
signature: str=None) -> None:
|
|
if not isinstance(content, str):
|
|
raise TypeError("Argument 'content' must be of type str")
|
|
|
|
self.id = id if id != None else sha256(Event.serialize(public_key, created_at, kind, tags, content)).hexdigest()
|
|
self.public_key = public_key
|
|
self.content = content
|
|
self.created_at = created_at
|
|
self.kind = kind
|
|
self.tags = tags
|
|
self.signature = signature
|
|
|
|
@staticmethod
|
|
def serialize(public_key: str, created_at: int, kind: int, tags: "list[list[str]]", content: str) -> bytes:
|
|
data = [0, public_key, created_at, kind, tags, content]
|
|
data_str = json.dumps(data, separators=(',', ':'))
|
|
return data_str.encode()
|
|
|
|
def sign(self, sk: str) -> None:
|
|
private_key = PrivateKey(bytes.fromhex(sk))
|
|
sig = private_key.schnorr_sign(bytes.fromhex(self.id), None, raw=True)
|
|
self.signature = sig.hex()
|
|
|
|
def verify(self) -> bool:
|
|
pub_key = PublicKey(bytes.fromhex("02" + self.public_key), True) # add 02 for schnorr (bip340)
|
|
return pub_key.schnorr_verify(bytes.fromhex(self.id), bytes.fromhex(self.signature), None, raw=True)
|
|
|
|
def to_json_object(self) -> dict:
|
|
return {
|
|
"id": self.id,
|
|
"pubkey": self.public_key,
|
|
"created_at": self.created_at,
|
|
"kind": self.kind,
|
|
"tags": self.tags,
|
|
"content": self.content,
|
|
"sig": self.signature
|
|
}
|