add nostr

cashu/wallet/cli.py

@@ -39,6 +39,9 @@ from cashu.wallet.crud import (
 )
 from cashu.wallet.wallet import Wallet as Wallet
 
+from nostr.client.client import NostrClient
+from nostr.key import PublicKey
+
 
 async def init_wallet(wallet: Wallet):
     """Performs migrations and loads proofs from db."""
@@ -433,3 +436,70 @@ async def info(ctx):
         print(f"Socks proxy: {SOCKS_HOST}:{SOCKS_PORT}")
     print(f"Mint URL: {MINT_URL}")
     return
+
+
+@cli.command("nostr", help="Receive tokens via nostr.")
+@click.pass_context
+@coro
+async def nostr(ctx):
+    wallet: Wallet = ctx.obj["WALLET"]
+    await wallet.load_mint()
+    client = NostrClient(
+        privatekey_hex="bfc6e7b0b998645d45aa451a3b9a3174bfe696fba78e86a86637a16f43e6c683"
+    )
+    print(f"Your nostr public key: {client.public_key.hex()}")
+    await asyncio.sleep(2)
+
+    def get_token_callback(token):
+        try:
+            proofs = [Proof(**p) for p in json.loads(base64.urlsafe_b64decode(token))]
+            wallet: Wallet = ctx.obj["WALLET"]
+            asyncio.run(wallet.redeem(proofs))
+            wallet.status()
+        except Exception as e:
+            pass
+
+    import threading
+
+    t = threading.Thread(
+        target=client.get_dm,
+        args=(
+            client.public_key,
+            get_token_callback,
+        ),
+        name="Nostr DM",
+    )
+    t.start()
+
+
+@cli.command("nostrsend", help="Send tokens via nostr.")
+@click.argument("amount", type=int)
+@click.argument(
+    "pubkey",
+    type=str,
+    default="13395e6d975825cb811549b4b6ba6695c7ea8f75e1f3658d6cee2bee243195c3",
+)
+@click.pass_context
+@coro
+async def nostrsend(ctx, amount: int, pubkey: str):
+    wallet: Wallet = ctx.obj["WALLET"]
+    await wallet.load_mint()
+    wallet.status()
+    _, send_proofs = await wallet.split_to_send(
+        wallet.proofs, amount, set_reserved=True
+    )
+    token = await wallet.serialize_proofs(send_proofs)
+
+    from random import randrange
+
+    # token = f"Token {randrange(1000)}"
+    print(token)
+    wallet.status()
+
+    client = NostrClient(
+        privatekey_hex="bfc6e7b0b598645d45aa451a3b9a3174bfe696fba78e86a86637a16f4ee6d683"
+    )
+    await asyncio.sleep(1)
+    client.dm(token, PublicKey(bytes.fromhex(pubkey)))
+    print("Sent")
+    client.close()

nostr/bech32.py

@@ -0,0 +1,137 @@
+# Copyright (c) 2017, 2020 Pieter Wuille
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+"""Reference implementation for Bech32/Bech32m and segwit addresses."""
+
+
+from enum import Enum
+
+class Encoding(Enum):
+    """Enumeration type to list the various supported encodings."""
+    BECH32 = 1
+    BECH32M = 2
+
+CHARSET = "qpzry9x8gf2tvdw0s3jn54khce6mua7l"
+BECH32M_CONST = 0x2bc830a3
+
+def bech32_polymod(values):
+    """Internal function that computes the Bech32 checksum."""
+    generator = [0x3b6a57b2, 0x26508e6d, 0x1ea119fa, 0x3d4233dd, 0x2a1462b3]
+    chk = 1
+    for value in values:
+        top = chk >> 25
+        chk = (chk & 0x1ffffff) << 5 ^ value
+        for i in range(5):
+            chk ^= generator[i] if ((top >> i) & 1) else 0
+    return chk
+
+
+def bech32_hrp_expand(hrp):
+    """Expand the HRP into values for checksum computation."""
+    return [ord(x) >> 5 for x in hrp] + [0] + [ord(x) & 31 for x in hrp]
+
+
+def bech32_verify_checksum(hrp, data):
+    """Verify a checksum given HRP and converted data characters."""
+    const = bech32_polymod(bech32_hrp_expand(hrp) + data)
+    if const == 1:
+        return Encoding.BECH32
+    if const == BECH32M_CONST:
+        return Encoding.BECH32M
+    return None
+
+def bech32_create_checksum(hrp, data, spec):
+    """Compute the checksum values given HRP and data."""
+    values = bech32_hrp_expand(hrp) + data
+    const = BECH32M_CONST if spec == Encoding.BECH32M else 1
+    polymod = bech32_polymod(values + [0, 0, 0, 0, 0, 0]) ^ const
+    return [(polymod >> 5 * (5 - i)) & 31 for i in range(6)]
+
+
+def bech32_encode(hrp, data, spec):
+    """Compute a Bech32 string given HRP and data values."""
+    combined = data + bech32_create_checksum(hrp, data, spec)
+    return hrp + '1' + ''.join([CHARSET[d] for d in combined])
+
+def bech32_decode(bech):
+    """Validate a Bech32/Bech32m string, and determine HRP and data."""
+    if ((any(ord(x) < 33 or ord(x) > 126 for x in bech)) or
+            (bech.lower() != bech and bech.upper() != bech)):
+        return (None, None, None)
+    bech = bech.lower()
+    pos = bech.rfind('1')
+    if pos < 1 or pos + 7 > len(bech) or len(bech) > 90:
+        return (None, None, None)
+    if not all(x in CHARSET for x in bech[pos+1:]):
+        return (None, None, None)
+    hrp = bech[:pos]
+    data = [CHARSET.find(x) for x in bech[pos+1:]]
+    spec = bech32_verify_checksum(hrp, data)
+    if spec is None:
+        return (None, None, None)
+    return (hrp, data[:-6], spec)
+
+def convertbits(data, frombits, tobits, pad=True):
+    """General power-of-2 base conversion."""
+    acc = 0
+    bits = 0
+    ret = []
+    maxv = (1 << tobits) - 1
+    max_acc = (1 << (frombits + tobits - 1)) - 1
+    for value in data:
+        if value < 0 or (value >> frombits):
+            return None
+        acc = ((acc << frombits) | value) & max_acc
+        bits += frombits
+        while bits >= tobits:
+            bits -= tobits
+            ret.append((acc >> bits) & maxv)
+    if pad:
+        if bits:
+            ret.append((acc << (tobits - bits)) & maxv)
+    elif bits >= frombits or ((acc << (tobits - bits)) & maxv):
+        return None
+    return ret
+
+
+def decode(hrp, addr):
+    """Decode a segwit address."""
+    hrpgot, data, spec = bech32_decode(addr)
+    if hrpgot != hrp:
+        return (None, None)
+    decoded = convertbits(data[1:], 5, 8, False)
+    if decoded is None or len(decoded) < 2 or len(decoded) > 40:
+        return (None, None)
+    if data[0] > 16:
+        return (None, None)
+    if data[0] == 0 and len(decoded) != 20 and len(decoded) != 32:
+        return (None, None)
+    if data[0] == 0 and spec != Encoding.BECH32 or data[0] != 0 and spec != Encoding.BECH32M:
+        return (None, None)
+    return (data[0], decoded)
+
+
+def encode(hrp, witver, witprog):
+    """Encode a segwit address."""
+    spec = Encoding.BECH32 if witver == 0 else Encoding.BECH32M
+    ret = bech32_encode(hrp, [witver] + convertbits(witprog, 8, 5), spec)
+    if decode(hrp, ret) == (None, None):
+        return None
+    return ret

nostr/client/aes.py

@@ -0,0 +1,86 @@
+import base64
+import getpass
+from hashlib import md5
+
+from Cryptodome import Random
+from Cryptodome.Cipher import AES
+
+BLOCK_SIZE = 16
+
+import getpass
+
+
+class AESCipher(object):
+    """This class is compatible with crypto-js/aes.js
+
+    Encrypt and decrypt in Javascript using:
+        import AES from "crypto-js/aes.js";
+        import Utf8 from "crypto-js/enc-utf8.js";
+        AES.encrypt(decrypted, password).toString()
+        AES.decrypt(encrypted, password).toString(Utf8);
+
+    """
+
+    def __init__(self, key=None, description=""):
+        self.key = key
+        self.description = description + " "
+
+    def pad(self, data):
+        length = BLOCK_SIZE - (len(data) % BLOCK_SIZE)
+        return data + (chr(length) * length).encode()
+
+    def unpad(self, data):
+        return data[: -(data[-1] if type(data[-1]) == int else ord(data[-1]))]
+
+    @property
+    def passphrase(self):
+        passphrase = self.key if self.key is not None else None
+        if passphrase is None:
+            passphrase = getpass.getpass(f"Enter {self.description}password:")
+        return passphrase
+
+    def bytes_to_key(self, data, salt, output=48):
+        # extended from https://gist.github.com/gsakkis/4546068
+        assert len(salt) == 8, len(salt)
+        data += salt
+        key = md5(data).digest()
+        final_key = key
+        while len(final_key) < output:
+            key = md5(key + data).digest()
+            final_key += key
+        return final_key[:output]
+
+    def decrypt(self, encrypted: str) -> str:  # type: ignore
+        """Decrypts a string using AES-256-CBC."""
+        passphrase = self.passphrase
+        encrypted = base64.b64decode(encrypted)  # type: ignore
+        assert encrypted[0:8] == b"Salted__"
+        salt = encrypted[8:16]
+        key_iv = self.bytes_to_key(passphrase.encode(), salt, 32 + 16)
+        key = key_iv[:32]
+        iv = key_iv[32:]
+        aes = AES.new(key, AES.MODE_CBC, iv)
+        try:
+            return self.unpad(aes.decrypt(encrypted[16:])).decode()  # type: ignore
+        except UnicodeDecodeError:
+            raise ValueError("Wrong passphrase")
+
+    def encrypt(self, message: bytes) -> str:
+        passphrase = self.passphrase
+        salt = Random.new().read(8)
+        key_iv = self.bytes_to_key(passphrase.encode(), salt, 32 + 16)
+        key = key_iv[:32]
+        iv = key_iv[32:]
+        aes = AES.new(key, AES.MODE_CBC, iv)
+        return base64.b64encode(
+            b"Salted__" + salt + aes.encrypt(self.pad(message))
+        ).decode()
+
+
+# # if this file is executed directly, ask for a macaroon and encrypt it
+# if __name__ == "__main__":
+#     macaroon = input("Enter macaroon: ")
+#     macaroon = load_macaroon(macaroon)
+#     macaroon = AESCipher(description="encryption").encrypt(macaroon.encode())
+#     logger.info("Encrypted macaroon:")
+#     logger.info(macaroon)

nostr/client/cbc.py

@@ -0,0 +1,41 @@
+
+from Cryptodome import Random
+from Cryptodome.Cipher import AES
+
+plain_text = "This is the text to encrypts"
+
+# encrypted = "7mH9jq3K9xNfWqIyu9gNpUz8qBvGwsrDJ+ACExdV1DvGgY8q39dkxVKeXD7LWCDrPnoD/ZFHJMRMis8v9lwHfNgJut8EVTMuJJi8oTgJevOBXl+E+bJPwej9hY3k20rgCQistNRtGHUzdWyOv7S1tg==".encode()
+# iv = "GzDzqOVShWu3Pl2313FBpQ==".encode()
+
+key = bytes.fromhex("3aa925cb69eb613e2928f8a18279c78b1dca04541dfd064df2eda66b59880795")
+
+BLOCK_SIZE = 16
+
+class AESCipher(object):
+    """This class is compatible with crypto.createCipheriv('aes-256-cbc')
+
+    """
+    def __init__(self, key=None):
+        self.key = key
+
+    def pad(self, data):
+        length = BLOCK_SIZE - (len(data) % BLOCK_SIZE)
+        return data + (chr(length) * length).encode()
+
+    def unpad(self, data):
+        return data[: -(data[-1] if type(data[-1]) == int else ord(data[-1]))]
+
+    def encrypt(self, plain_text):
+        cipher = AES.new(self.key, AES.MODE_CBC)
+        b = plain_text.encode("UTF-8")
+        return cipher.iv, cipher.encrypt(self.pad(b))
+
+    def decrypt(self, iv, enc_text):
+        cipher = AES.new(self.key, AES.MODE_CBC, iv=iv)
+        return self.unpad(cipher.decrypt(enc_text).decode("UTF-8"))
+        
+if __name__ == "__main__":
+    aes = AESCipher(key=key)
+    iv, enc_text = aes.encrypt(plain_text)
+    dec_text = aes.decrypt(iv, enc_text)
+    print(dec_text)

nostr/client/client.py

@@ -0,0 +1,165 @@
+from typing import *
+import ssl
+import time
+import json
+import os
+import base64 
+
+from nostr.event import Event
+from nostr.relay_manager import RelayManager
+from nostr.message_type import ClientMessageType
+from nostr.key import PrivateKey, PublicKey
+
+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 aes import AESCipher
+from . import cbc
+
+
+class NostrClient:
+    relays = [
+        "wss://nostr.zebedee.cloud"
+    ]  # ["wss://nostr.oxtr.dev"]  # ["wss://relay.nostr.info"] "wss://nostr-pub.wellorder.net"  "ws://91.237.88.218:2700", "wss://nostrrr.bublina.eu.org", ""wss://nostr-relay.freeberty.net"", , "wss://nostr.oxtr.dev", "wss://relay.nostr.info", "wss://nostr-pub.wellorder.net" , "wss://relayer.fiatjaf.com", "wss://nodestr.fmt.wiz.biz/"
+    relay_manager = RelayManager()
+    private_key: PrivateKey
+    public_key: PublicKey
+
+    def __init__(self, privatekey_hex: str = "", relays: List[str] = []):
+        self.generate_keys(privatekey_hex)
+
+        if len(relays):
+            self.relays = relays
+
+        for relay in self.relays:
+            self.relay_manager.add_relay(relay)
+        self.relay_manager.open_connections(
+            {"cert_reqs": ssl.CERT_NONE}
+        )  # NOTE: This disables ssl certificate verification
+
+    def close(self):
+        self.relay_manager.close_connections()
+
+    def generate_keys(self, privatekey_hex: str = None):
+        pk = bytes.fromhex(privatekey_hex) if privatekey_hex else None
+        self.private_key = PrivateKey(pk)
+        self.public_key = self.private_key.public_key
+        print(f"Private key: {self.private_key.bech32()} ({self.private_key.hex()})")
+        print(f"Public key: {self.public_key.bech32()} ({self.public_key.hex()})")
+
+    def post(self, message: str):
+        event = Event(self.public_key.hex(), message, kind=EventKind.TEXT_NOTE)
+        event.sign(self.private_key.hex())
+        message = json.dumps([ClientMessageType.EVENT, event.to_json_object()])
+        print("Publishing message:")
+        print(message)
+        self.relay_manager.publish_message(message)
+
+    def get_post(self, sender_publickey: PublicKey):
+        filters = Filters(
+            [Filter(authors=[sender_publickey.hex()], kinds=[EventKind.TEXT_NOTE])]
+        )
+        subscription_id = os.urandom(4).hex()
+        self.relay_manager.add_subscription(subscription_id, filters)
+
+        request = [ClientMessageType.REQUEST, subscription_id]
+        request.extend(filters.to_json_array())
+        message = json.dumps(request)
+        print("Subscribing to events:")
+        print(message)
+        self.relay_manager.publish_message(message)
+
+        message_received = False
+        while True:
+            while self.relay_manager.message_pool.has_events():
+                event_msg = self.relay_manager.message_pool.get_event()
+                print(event_msg.event.content)
+                message_received = True
+                break
+            else:
+                time.sleep(0.1)
+
+    def dm(self, message: str, to_pubkey: PublicKey):
+
+        shared_secret = self.private_key.compute_shared_secret(
+            to_pubkey.hex()
+        )
+
+        # print("shared secret: ", shared_secret.hex())
+        # print("plain text:", message)
+        aes = cbc.AESCipher(key=shared_secret)
+        iv, enc_text = aes.encrypt(message)
+        # print("encrypt iv: ", iv)
+        content = f"{base64.b64encode(enc_text).decode('utf-8')}?iv={base64.b64encode(iv).decode('utf-8')}"
+
+
+        event = Event(
+            self.public_key.hex(),
+            content,
+            tags=[["p", to_pubkey.hex()]],
+            kind=EventKind.ENCRYPTED_DIRECT_MESSAGE,
+        )
+        event.sign(self.private_key.hex())
+        event_message = json.dumps([ClientMessageType.EVENT, event.to_json_object()])
+        # print("DM message:")
+        # print(event_message)
+
+        time.sleep(1)
+        self.relay_manager.publish_message(event_message)
+
+    def get_dm(self, sender_publickey: PublicKey, callback_func=None):
+        filters = Filters(
+            [
+                Filter(
+                    kinds=[EventKind.ENCRYPTED_DIRECT_MESSAGE],
+                    tags={"#p": [sender_publickey.hex()]},
+                )
+            ]
+        )
+        subscription_id = os.urandom(4).hex()
+        self.relay_manager.add_subscription(subscription_id, filters)
+
+        request = [ClientMessageType.REQUEST, subscription_id]
+        request.extend(filters.to_json_array())
+        message = json.dumps(request)
+        # print("Subscribing to events:")
+        # print(message)
+        self.relay_manager.publish_message(message)
+
+        while True:
+            while self.relay_manager.message_pool.has_events():
+                event_msg = self.relay_manager.message_pool.get_event()
+                
+                if "?iv=" in event_msg.event.content:
+                    try:
+                        shared_secret = self.private_key.compute_shared_secret(
+                            event_msg.event.public_key
+                        )
+                        # print("shared secret: ", shared_secret.hex())
+                        # print("plain text:", message)
+                        aes = cbc.AESCipher(key=shared_secret)
+                        enc_text_b64, iv_b64 = event_msg.event.content.split("?iv=")
+                        iv = base64.decodebytes(iv_b64.encode("utf-8"))
+                        enc_text = base64.decodebytes(enc_text_b64.encode("utf-8"))
+                        # print("decrypt iv: ", iv)
+                        dec_text = aes.decrypt(iv, enc_text)
+                        print(f"From {event_msg.event.public_key[:5]}...: {dec_text}")
+                        if callback_func:
+                            callback_func(dec_text)
+                    except:
+                        pass
+                else:
+                    print(f"\nFrom {event_msg.event.public_key[:5]}...: {event_msg.event.content}")
+                break
+            time.sleep(0.1)
+
+    async def subscribe(self):
+        while True:
+            while self.relay_manager.message_pool.has_events():
+                event_msg = self.relay_manager.message_pool.get_event()
+                print(event_msg.event.content)
+                break
+            time.sleep(0.1)
+

nostr/event.py

@@ -0,0 +1,65 @@
+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 not id is None else Event.compute_id(public_key, created_at, kind, tags, content)
+        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=(',', ':'), ensure_ascii=False)
+        return data_str.encode()
+
+    @staticmethod
+    def compute_id(public_key: str, created_at: int, kind: int, tags: "list[list[str]]", content: str) -> str:
+        return sha256(Event.serialize(public_key, created_at, kind, tags, content)).hexdigest()
+
+    def sign(self, private_key_hex: str) -> None:
+        sk = PrivateKey(bytes.fromhex(private_key_hex))
+        sig = sk.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)
+        event_id = Event.compute_id(self.public_key, self.created_at, self.kind, self.tags, self.content)
+        return pub_key.schnorr_verify(bytes.fromhex(event_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
+        }

nostr/filter.py

@@ -0,0 +1,81 @@
+from collections import UserList
+from .event import Event
+
+
+class Filter:
+    def __init__(
+        self,
+        ids: "list[str]" = None,
+        kinds: "list[int]" = None,
+        authors: "list[str]" = None,
+        since: int = None,
+        until: int = None,
+        tags: "dict[str, list[str]]" = None,
+        limit: int = None,
+    ) -> None:
+        self.IDs = ids
+        self.kinds = kinds
+        self.authors = authors
+        self.since = since
+        self.until = until
+        self.tags = tags
+        self.limit = limit
+
+    def matches(self, event: Event) -> bool:
+        if self.IDs != None and event.id not in self.IDs:
+            return False
+        if self.kinds != None and event.kind not in self.kinds:
+            return False
+        if self.authors != None and event.public_key not in self.authors:
+            return False
+        if self.since != None and event.created_at < self.since:
+            return False
+        if self.until != None and event.created_at > self.until:
+            return False
+        if self.tags != None and len(event.tags) == 0:
+            return False
+        if self.tags != None:
+            e_tag_identifiers = [e_tag[0] for e_tag in event.tags]
+            for f_tag, f_tag_values in self.tags.items():
+                if f_tag[1:] not in e_tag_identifiers:
+                    return False
+                for e_tag in event.tags:
+                    if e_tag[1] not in f_tag_values:
+                        return False
+
+        return True
+
+    def to_json_object(self) -> dict:
+        res = {}
+        if self.IDs != None:
+            res["ids"] = self.IDs
+        if self.kinds != None:
+            res["kinds"] = self.kinds
+        if self.authors != None:
+            res["authors"] = self.authors
+        if self.since != None:
+            res["since"] = self.since
+        if self.until != None:
+            res["until"] = self.until
+        if self.tags != None:
+            for tag, values in self.tags.items():
+                res[tag] = values
+        if self.limit != None:
+            res["limit"] = self.limit
+
+        return res
+
+
+class Filters(UserList):
+    def __init__(self, initlist: "list[Filter]" = []) -> None:
+        super().__init__(initlist)
+        self.data: "list[Filter]"
+
+    def match(self, event: Event):
+        for filter in self.data:
+            if filter.matches(event):
+                return True
+        return False
+
+    def to_json_array(self) -> list:
+        return [filter.to_json_object() for filter in self.data]

nostr/key.py

@@ -0,0 +1,86 @@
+import secrets
+import base64
+import secp256k1
+from cffi import FFI
+from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
+from cryptography.hazmat.primitives import padding
+from . import bech32
+
+class PublicKey:
+    def __init__(self, raw_bytes: bytes) -> None:
+        self.raw_bytes = raw_bytes
+
+    def bech32(self) -> str:
+        converted_bits = bech32.convertbits(self.raw_bytes, 8, 5)
+        return bech32.bech32_encode("npub", converted_bits, bech32.Encoding.BECH32)
+
+    def hex(self) -> str:
+        return self.raw_bytes.hex()
+
+    def verify_signed_message_hash(self, hash: str, sig: str) -> bool:
+        pk = secp256k1.PublicKey(b"\x02" + self.raw_bytes, True)
+        return pk.schnorr_verify(bytes.fromhex(hash), bytes.fromhex(sig), None, True)
+
+class PrivateKey:
+    def __init__(self, raw_secret: bytes=None) -> None:
+        if not raw_secret is None:
+            self.raw_secret = raw_secret
+        else:
+            self.raw_secret = secrets.token_bytes(32)
+
+        sk = secp256k1.PrivateKey(self.raw_secret)
+        self.public_key = PublicKey(sk.pubkey.serialize()[1:])
+
+    def bech32(self) -> str:
+        converted_bits = bech32.convertbits(self.raw_secret, 8, 5)
+        return bech32.bech32_encode("nsec", converted_bits, bech32.Encoding.BECH32)
+
+    def hex(self) -> str:
+        return self.raw_secret.hex()
+
+    def tweak_add(self, scalar: bytes) -> bytes:
+        sk = secp256k1.PrivateKey(self.raw_secret)
+        return sk.tweak_add(scalar)
+
+    def compute_shared_secret(self, public_key_hex: str) -> bytes:
+        pk = secp256k1.PublicKey(bytes.fromhex("02" + public_key_hex), True)
+        return pk.ecdh(self.raw_secret, hashfn=copy_x)
+
+    def encrypt_message(self, message: str, public_key_hex: str) -> str:
+        padder = padding.PKCS7(128).padder()
+        padded_data = padder.update(message.encode()) + padder.finalize()
+
+        iv = secrets.token_bytes(16)
+        cipher = Cipher(algorithms.AES(self.compute_shared_secret(public_key_hex)), modes.CBC(iv))
+
+        encryptor = cipher.encryptor()
+        encrypted_message = encryptor.update(padded_data) + encryptor.finalize()
+
+        return f"{base64.b64encode(encrypted_message).decode()}?iv={base64.b64encode(iv).decode()}"
+
+    def decrypt_message(self, encoded_message: str, public_key_hex: str) -> str:
+        encoded_data = encoded_message.split('?iv=')
+        encoded_content, encoded_iv = encoded_data[0], encoded_data[1]
+
+        iv = base64.b64decode(encoded_iv)
+        cipher = Cipher(algorithms.AES(self.compute_shared_secret(public_key_hex)), modes.CBC(iv))
+        encrypted_content = base64.b64decode(encoded_content)
+
+        decryptor = cipher.decryptor()
+        decrypted_message = decryptor.update(encrypted_content) + decryptor.finalize()
+
+        unpadder = padding.PKCS7(128).unpadder()
+        unpadded_data = unpadder.update(decrypted_message) + unpadder.finalize()
+
+        return unpadded_data.decode()
+
+    def sign_message_hash(self, hash: bytes) -> str:
+        sk = secp256k1.PrivateKey(self.raw_secret)
+        sig = sk.schnorr_sign(hash, None, raw=True)
+        return sig.hex()
+
+ffi = FFI()
+@ffi.callback("int (unsigned char *, const unsigned char *, const unsigned char *, void *)")
+def copy_x(output, x32, y32, data):
+    ffi.memmove(output, x32, 32)
+    return 1

nostr/message_pool.py

@@ -0,0 +1,78 @@
+import json
+from queue import Queue
+from threading import Lock
+from .message_type import RelayMessageType
+from .event import Event
+
+
+class EventMessage:
+    def __init__(self, event: Event, subscription_id: str, url: str) -> None:
+        self.event = event
+        self.subscription_id = subscription_id
+        self.url = url
+
+
+class NoticeMessage:
+    def __init__(self, content: str, url: str) -> None:
+        self.content = content
+        self.url = url
+
+
+class EndOfStoredEventsMessage:
+    def __init__(self, subscription_id: str, url: str) -> None:
+        self.subscription_id = subscription_id
+        self.url = url
+
+
+class MessagePool:
+    def __init__(self) -> None:
+        self.events: Queue[EventMessage] = Queue()
+        self.notices: Queue[NoticeMessage] = Queue()
+        self.eose_notices: Queue[EndOfStoredEventsMessage] = Queue()
+        self._unique_events: set = set()
+        self.lock: Lock = Lock()
+
+    def add_message(self, message: str, url: str):
+        self._process_message(message, url)
+
+    def get_event(self):
+        return self.events.get()
+
+    def get_notice(self):
+        return self.notices.get()
+
+    def get_eose_notice(self):
+        return self.eose_notices.get()
+
+    def has_events(self):
+        return self.events.qsize() > 0
+
+    def has_notices(self):
+        return self.notices.qsize() > 0
+
+    def has_eose_notices(self):
+        return self.eose_notices.qsize() > 0
+
+    def _process_message(self, message: str, url: str):
+        message_json = json.loads(message)
+        message_type = message_json[0]
+        if message_type == RelayMessageType.EVENT:
+            subscription_id = message_json[1]
+            e = message_json[2]
+            event = Event(
+                e["pubkey"],
+                e["content"],
+                e["created_at"],
+                e["kind"],
+                e["tags"],
+                e["id"],
+                e["sig"],
+            )
+            with self.lock:
+                if not event.id in self._unique_events:
+                    self.events.put(EventMessage(event, subscription_id, url))
+                    self._unique_events.add(event.id)
+        elif message_type == RelayMessageType.NOTICE:
+            self.notices.put(NoticeMessage(message_json[1], url))
+        elif message_type == RelayMessageType.END_OF_STORED_EVENTS:
+            self.eose_notices.put(EndOfStoredEventsMessage(message_json[1], url))

nostr/message_type.py

@@ -0,0 +1,15 @@
+class ClientMessageType:
+    EVENT = "EVENT"
+    REQUEST = "REQ"
+    CLOSE = "CLOSE"
+
+class RelayMessageType:
+    EVENT = "EVENT"
+    NOTICE = "NOTICE"
+    END_OF_STORED_EVENTS = "EOSE"
+
+    @staticmethod
+    def is_valid(type: str) -> bool:
+        if type == RelayMessageType.EVENT or type == RelayMessageType.NOTICE or type == RelayMessageType.END_OF_STORED_EVENTS:
+            return True
+        return False

nostr/nostr/bech32.py

@@ -0,0 +1,137 @@
+# Copyright (c) 2017, 2020 Pieter Wuille
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+"""Reference implementation for Bech32/Bech32m and segwit addresses."""
+
+
+from enum import Enum
+
+class Encoding(Enum):
+    """Enumeration type to list the various supported encodings."""
+    BECH32 = 1
+    BECH32M = 2
+
+CHARSET = "qpzry9x8gf2tvdw0s3jn54khce6mua7l"
+BECH32M_CONST = 0x2bc830a3
+
+def bech32_polymod(values):
+    """Internal function that computes the Bech32 checksum."""
+    generator = [0x3b6a57b2, 0x26508e6d, 0x1ea119fa, 0x3d4233dd, 0x2a1462b3]
+    chk = 1
+    for value in values:
+        top = chk >> 25
+        chk = (chk & 0x1ffffff) << 5 ^ value
+        for i in range(5):
+            chk ^= generator[i] if ((top >> i) & 1) else 0
+    return chk
+
+
+def bech32_hrp_expand(hrp):
+    """Expand the HRP into values for checksum computation."""
+    return [ord(x) >> 5 for x in hrp] + [0] + [ord(x) & 31 for x in hrp]
+
+
+def bech32_verify_checksum(hrp, data):
+    """Verify a checksum given HRP and converted data characters."""
+    const = bech32_polymod(bech32_hrp_expand(hrp) + data)
+    if const == 1:
+        return Encoding.BECH32
+    if const == BECH32M_CONST:
+        return Encoding.BECH32M
+    return None
+
+def bech32_create_checksum(hrp, data, spec):
+    """Compute the checksum values given HRP and data."""
+    values = bech32_hrp_expand(hrp) + data
+    const = BECH32M_CONST if spec == Encoding.BECH32M else 1
+    polymod = bech32_polymod(values + [0, 0, 0, 0, 0, 0]) ^ const
+    return [(polymod >> 5 * (5 - i)) & 31 for i in range(6)]
+
+
+def bech32_encode(hrp, data, spec):
+    """Compute a Bech32 string given HRP and data values."""
+    combined = data + bech32_create_checksum(hrp, data, spec)
+    return hrp + '1' + ''.join([CHARSET[d] for d in combined])
+
+def bech32_decode(bech):
+    """Validate a Bech32/Bech32m string, and determine HRP and data."""
+    if ((any(ord(x) < 33 or ord(x) > 126 for x in bech)) or
+            (bech.lower() != bech and bech.upper() != bech)):
+        return (None, None, None)
+    bech = bech.lower()
+    pos = bech.rfind('1')
+    if pos < 1 or pos + 7 > len(bech) or len(bech) > 90:
+        return (None, None, None)
+    if not all(x in CHARSET for x in bech[pos+1:]):
+        return (None, None, None)
+    hrp = bech[:pos]
+    data = [CHARSET.find(x) for x in bech[pos+1:]]
+    spec = bech32_verify_checksum(hrp, data)
+    if spec is None:
+        return (None, None, None)
+    return (hrp, data[:-6], spec)
+
+def convertbits(data, frombits, tobits, pad=True):
+    """General power-of-2 base conversion."""
+    acc = 0
+    bits = 0
+    ret = []
+    maxv = (1 << tobits) - 1
+    max_acc = (1 << (frombits + tobits - 1)) - 1
+    for value in data:
+        if value < 0 or (value >> frombits):
+            return None
+        acc = ((acc << frombits) | value) & max_acc
+        bits += frombits
+        while bits >= tobits:
+            bits -= tobits
+            ret.append((acc >> bits) & maxv)
+    if pad:
+        if bits:
+            ret.append((acc << (tobits - bits)) & maxv)
+    elif bits >= frombits or ((acc << (tobits - bits)) & maxv):
+        return None
+    return ret
+
+
+def decode(hrp, addr):
+    """Decode a segwit address."""
+    hrpgot, data, spec = bech32_decode(addr)
+    if hrpgot != hrp:
+        return (None, None)
+    decoded = convertbits(data[1:], 5, 8, False)
+    if decoded is None or len(decoded) < 2 or len(decoded) > 40:
+        return (None, None)
+    if data[0] > 16:
+        return (None, None)
+    if data[0] == 0 and len(decoded) != 20 and len(decoded) != 32:
+        return (None, None)
+    if data[0] == 0 and spec != Encoding.BECH32 or data[0] != 0 and spec != Encoding.BECH32M:
+        return (None, None)
+    return (data[0], decoded)
+
+
+def encode(hrp, witver, witprog):
+    """Encode a segwit address."""
+    spec = Encoding.BECH32 if witver == 0 else Encoding.BECH32M
+    ret = bech32_encode(hrp, [witver] + convertbits(witprog, 8, 5), spec)
+    if decode(hrp, ret) == (None, None):
+        return None
+    return ret

nostr/nostr/client/aes.py

@@ -0,0 +1,86 @@
+import base64
+import getpass
+from hashlib import md5
+
+from Cryptodome import Random
+from Cryptodome.Cipher import AES
+
+BLOCK_SIZE = 16
+
+import getpass
+
+
+class AESCipher(object):
+    """This class is compatible with crypto-js/aes.js
+
+    Encrypt and decrypt in Javascript using:
+        import AES from "crypto-js/aes.js";
+        import Utf8 from "crypto-js/enc-utf8.js";
+        AES.encrypt(decrypted, password).toString()
+        AES.decrypt(encrypted, password).toString(Utf8);
+
+    """
+
+    def __init__(self, key=None, description=""):
+        self.key = key
+        self.description = description + " "
+
+    def pad(self, data):
+        length = BLOCK_SIZE - (len(data) % BLOCK_SIZE)
+        return data + (chr(length) * length).encode()
+
+    def unpad(self, data):
+        return data[: -(data[-1] if type(data[-1]) == int else ord(data[-1]))]
+
+    @property
+    def passphrase(self):
+        passphrase = self.key if self.key is not None else None
+        if passphrase is None:
+            passphrase = getpass.getpass(f"Enter {self.description}password:")
+        return passphrase
+
+    def bytes_to_key(self, data, salt, output=48):
+        # extended from https://gist.github.com/gsakkis/4546068
+        assert len(salt) == 8, len(salt)
+        data += salt
+        key = md5(data).digest()
+        final_key = key
+        while len(final_key) < output:
+            key = md5(key + data).digest()
+            final_key += key
+        return final_key[:output]
+
+    def decrypt(self, encrypted: str) -> str:  # type: ignore
+        """Decrypts a string using AES-256-CBC."""
+        passphrase = self.passphrase
+        encrypted = base64.b64decode(encrypted)  # type: ignore
+        assert encrypted[0:8] == b"Salted__"
+        salt = encrypted[8:16]
+        key_iv = self.bytes_to_key(passphrase.encode(), salt, 32 + 16)
+        key = key_iv[:32]
+        iv = key_iv[32:]
+        aes = AES.new(key, AES.MODE_CBC, iv)
+        try:
+            return self.unpad(aes.decrypt(encrypted[16:])).decode()  # type: ignore
+        except UnicodeDecodeError:
+            raise ValueError("Wrong passphrase")
+
+    def encrypt(self, message: bytes) -> str:
+        passphrase = self.passphrase
+        salt = Random.new().read(8)
+        key_iv = self.bytes_to_key(passphrase.encode(), salt, 32 + 16)
+        key = key_iv[:32]
+        iv = key_iv[32:]
+        aes = AES.new(key, AES.MODE_CBC, iv)
+        return base64.b64encode(
+            b"Salted__" + salt + aes.encrypt(self.pad(message))
+        ).decode()
+
+
+# # if this file is executed directly, ask for a macaroon and encrypt it
+# if __name__ == "__main__":
+#     macaroon = input("Enter macaroon: ")
+#     macaroon = load_macaroon(macaroon)
+#     macaroon = AESCipher(description="encryption").encrypt(macaroon.encode())
+#     logger.info("Encrypted macaroon:")
+#     logger.info(macaroon)

nostr/nostr/client/cbc.py

@@ -0,0 +1,41 @@
+
+from Cryptodome import Random
+from Cryptodome.Cipher import AES
+
+plain_text = "This is the text to encrypts"
+
+# encrypted = "7mH9jq3K9xNfWqIyu9gNpUz8qBvGwsrDJ+ACExdV1DvGgY8q39dkxVKeXD7LWCDrPnoD/ZFHJMRMis8v9lwHfNgJut8EVTMuJJi8oTgJevOBXl+E+bJPwej9hY3k20rgCQistNRtGHUzdWyOv7S1tg==".encode()
+# iv = "GzDzqOVShWu3Pl2313FBpQ==".encode()
+
+key = bytes.fromhex("3aa925cb69eb613e2928f8a18279c78b1dca04541dfd064df2eda66b59880795")
+
+BLOCK_SIZE = 16
+
+class AESCipher(object):
+    """This class is compatible with crypto.createCipheriv('aes-256-cbc')
+
+    """
+    def __init__(self, key=None):
+        self.key = key
+
+    def pad(self, data):
+        length = BLOCK_SIZE - (len(data) % BLOCK_SIZE)
+        return data + (chr(length) * length).encode()
+
+    def unpad(self, data):
+        return data[: -(data[-1] if type(data[-1]) == int else ord(data[-1]))]
+
+    def encrypt(self, plain_text):
+        cipher = AES.new(self.key, AES.MODE_CBC)
+        b = plain_text.encode("UTF-8")
+        return cipher.iv, cipher.encrypt(self.pad(b))
+
+    def decrypt(self, iv, enc_text):
+        cipher = AES.new(self.key, AES.MODE_CBC, iv=iv)
+        return self.unpad(cipher.decrypt(enc_text).decode("UTF-8"))
+        
+if __name__ == "__main__":
+    aes = AESCipher(key=key)
+    iv, enc_text = aes.encrypt(plain_text)
+    dec_text = aes.decrypt(iv, enc_text)
+    print(dec_text)

nostr/nostr/client/client.py

@@ -0,0 +1,165 @@
+from typing import *
+import ssl
+import time
+import json
+import os
+import base64 
+
+from nostr.event import Event
+from nostr.relay_manager import RelayManager
+from nostr.message_type import ClientMessageType
+from nostr.key import PrivateKey, PublicKey
+
+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 aes import AESCipher
+from . import cbc
+
+
+class NostrClient:
+    relays = [
+        "wss://nostr.zebedee.cloud"
+    ]  # ["wss://nostr.oxtr.dev"]  # ["wss://relay.nostr.info"] "wss://nostr-pub.wellorder.net"  "ws://91.237.88.218:2700", "wss://nostrrr.bublina.eu.org", ""wss://nostr-relay.freeberty.net"", , "wss://nostr.oxtr.dev", "wss://relay.nostr.info", "wss://nostr-pub.wellorder.net" , "wss://relayer.fiatjaf.com", "wss://nodestr.fmt.wiz.biz/", "wss://no.str.cr"
+    relay_manager = RelayManager()
+    private_key: PrivateKey
+    public_key: PublicKey
+
+    def __init__(self, privatekey_hex: str = "", relays: List[str] = []):
+        self.generate_keys(privatekey_hex)
+
+        if len(relays):
+            self.relays = relays
+
+        for relay in self.relays:
+            self.relay_manager.add_relay(relay)
+        self.relay_manager.open_connections(
+            {"cert_reqs": ssl.CERT_NONE}
+        )  # NOTE: This disables ssl certificate verification
+
+    def close(self):
+        self.relay_manager.close_connections()
+
+    def generate_keys(self, privatekey_hex: str = None):
+        pk = bytes.fromhex(privatekey_hex) if privatekey_hex else None
+        self.private_key = PrivateKey(pk)
+        self.public_key = self.private_key.public_key
+        print(f"Private key: {self.private_key.bech32()} ({self.private_key.hex()})")
+        print(f"Public key: {self.public_key.bech32()} ({self.public_key.hex()})")
+
+    def post(self, message: str):
+        event = Event(self.public_key.hex(), message, kind=EventKind.TEXT_NOTE)
+        event.sign(self.private_key.hex())
+        message = json.dumps([ClientMessageType.EVENT, event.to_json_object()])
+        # print("Publishing message:")
+        # print(message)
+        self.relay_manager.publish_message(message)
+
+    def get_post(self, sender_publickey: PublicKey):
+        filters = Filters(
+            [Filter(authors=[sender_publickey.hex()], kinds=[EventKind.TEXT_NOTE])]
+        )
+        subscription_id = os.urandom(4).hex()
+        self.relay_manager.add_subscription(subscription_id, filters)
+
+        request = [ClientMessageType.REQUEST, subscription_id]
+        request.extend(filters.to_json_array())
+        message = json.dumps(request)
+        # print("Subscribing to events:")
+        # print(message)
+        self.relay_manager.publish_message(message)
+
+        message_received = False
+        while True:
+            while self.relay_manager.message_pool.has_events():
+                event_msg = self.relay_manager.message_pool.get_event()
+                print(event_msg.event.content)
+                message_received = True
+                break
+            else:
+                time.sleep(0.1)
+
+    def dm(self, message: str, to_pubkey: PublicKey):
+
+        shared_secret = self.private_key.compute_shared_secret(
+            to_pubkey.hex()
+        )
+
+        # print("shared secret: ", shared_secret.hex())
+        # print("plain text:", message)
+        aes = cbc.AESCipher(key=shared_secret)
+        iv, enc_text = aes.encrypt(message)
+        # print("encrypt iv: ", iv)
+        content = f"{base64.b64encode(enc_text).decode('utf-8')}?iv={base64.b64encode(iv).decode('utf-8')}"
+
+
+        event = Event(
+            self.public_key.hex(),
+            content,
+            tags=[["p", to_pubkey.hex()]],
+            kind=EventKind.ENCRYPTED_DIRECT_MESSAGE,
+        )
+        event.sign(self.private_key.hex())
+        event_message = json.dumps([ClientMessageType.EVENT, event.to_json_object()])
+        # print("DM message:")
+        # print(event_message)
+
+        time.sleep(1)
+        self.relay_manager.publish_message(event_message)
+
+    def get_dm(self, sender_publickey: PublicKey, callback_func=None):
+        filters = Filters(
+            [
+                Filter(
+                    kinds=[EventKind.ENCRYPTED_DIRECT_MESSAGE],
+                    tags={"#p": [sender_publickey.hex()]},
+                )
+            ]
+        )
+        subscription_id = os.urandom(4).hex()
+        self.relay_manager.add_subscription(subscription_id, filters)
+
+        request = [ClientMessageType.REQUEST, subscription_id]
+        request.extend(filters.to_json_array())
+        message = json.dumps(request)
+        # print("Subscribing to events:")
+        # print(message)
+        self.relay_manager.publish_message(message)
+
+        while True:
+            while self.relay_manager.message_pool.has_events():
+                event_msg = self.relay_manager.message_pool.get_event()
+                
+                if "?iv=" in event_msg.event.content:
+                    try:
+                        shared_secret = self.private_key.compute_shared_secret(
+                            event_msg.event.public_key
+                        )
+                        # print("shared secret: ", shared_secret.hex())
+                        # print("plain text:", message)
+                        aes = cbc.AESCipher(key=shared_secret)
+                        enc_text_b64, iv_b64 = event_msg.event.content.split("?iv=")
+                        iv = base64.decodebytes(iv_b64.encode("utf-8"))
+                        enc_text = base64.decodebytes(enc_text_b64.encode("utf-8"))
+                        # print("decrypt iv: ", iv)
+                        dec_text = aes.decrypt(iv, enc_text)
+                        # print(f"From {event_msg.event.public_key[:5]}...: {dec_text}")
+                        if callback_func:
+                            callback_func(event_msg.event, dec_text)
+                    except:
+                        pass
+                # else:
+                    # print(f"\nFrom {event_msg.event.public_key[:5]}...: {event_msg.event.content}")
+                break
+            time.sleep(0.1)
+
+    async def subscribe(self):
+        while True:
+            while self.relay_manager.message_pool.has_events():
+                event_msg = self.relay_manager.message_pool.get_event()
+                print(event_msg.event.content)
+                break
+            time.sleep(0.1)
+

nostr/nostr/event.py

@@ -0,0 +1,65 @@
+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 not id is None else Event.compute_id(public_key, created_at, kind, tags, content)
+        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=(',', ':'), ensure_ascii=False)
+        return data_str.encode()
+
+    @staticmethod
+    def compute_id(public_key: str, created_at: int, kind: int, tags: "list[list[str]]", content: str) -> str:
+        return sha256(Event.serialize(public_key, created_at, kind, tags, content)).hexdigest()
+
+    def sign(self, private_key_hex: str) -> None:
+        sk = PrivateKey(bytes.fromhex(private_key_hex))
+        sig = sk.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)
+        event_id = Event.compute_id(self.public_key, self.created_at, self.kind, self.tags, self.content)
+        return pub_key.schnorr_verify(bytes.fromhex(event_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
+        }

nostr/nostr/filter.py

@@ -0,0 +1,81 @@
+from collections import UserList
+from .event import Event
+
+
+class Filter:
+    def __init__(
+        self,
+        ids: "list[str]" = None,
+        kinds: "list[int]" = None,
+        authors: "list[str]" = None,
+        since: int = None,
+        until: int = None,
+        tags: "dict[str, list[str]]" = None,
+        limit: int = None,
+    ) -> None:
+        self.IDs = ids
+        self.kinds = kinds
+        self.authors = authors
+        self.since = since
+        self.until = until
+        self.tags = tags
+        self.limit = limit
+
+    def matches(self, event: Event) -> bool:
+        if self.IDs != None and event.id not in self.IDs:
+            return False
+        if self.kinds != None and event.kind not in self.kinds:
+            return False
+        if self.authors != None and event.public_key not in self.authors:
+            return False
+        if self.since != None and event.created_at < self.since:
+            return False
+        if self.until != None and event.created_at > self.until:
+            return False
+        if self.tags != None and len(event.tags) == 0:
+            return False
+        if self.tags != None:
+            e_tag_identifiers = [e_tag[0] for e_tag in event.tags]
+            for f_tag, f_tag_values in self.tags.items():
+                if f_tag[1:] not in e_tag_identifiers:
+                    return False
+                for e_tag in event.tags:
+                    if e_tag[1] not in f_tag_values:
+                        return False
+
+        return True
+
+    def to_json_object(self) -> dict:
+        res = {}
+        if self.IDs != None:
+            res["ids"] = self.IDs
+        if self.kinds != None:
+            res["kinds"] = self.kinds
+        if self.authors != None:
+            res["authors"] = self.authors
+        if self.since != None:
+            res["since"] = self.since
+        if self.until != None:
+            res["until"] = self.until
+        if self.tags != None:
+            for tag, values in self.tags.items():
+                res[tag] = values
+        if self.limit != None:
+            res["limit"] = self.limit
+
+        return res
+
+
+class Filters(UserList):
+    def __init__(self, initlist: "list[Filter]" = []) -> None:
+        super().__init__(initlist)
+        self.data: "list[Filter]"
+
+    def match(self, event: Event):
+        for filter in self.data:
+            if filter.matches(event):
+                return True
+        return False
+
+    def to_json_array(self) -> list:
+        return [filter.to_json_object() for filter in self.data]

nostr/nostr/key.py

@@ -0,0 +1,86 @@
+import secrets
+import base64
+import secp256k1
+from cffi import FFI
+from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
+from cryptography.hazmat.primitives import padding
+from . import bech32
+
+class PublicKey:
+    def __init__(self, raw_bytes: bytes) -> None:
+        self.raw_bytes = raw_bytes
+
+    def bech32(self) -> str:
+        converted_bits = bech32.convertbits(self.raw_bytes, 8, 5)
+        return bech32.bech32_encode("npub", converted_bits, bech32.Encoding.BECH32)
+
+    def hex(self) -> str:
+        return self.raw_bytes.hex()
+
+    def verify_signed_message_hash(self, hash: str, sig: str) -> bool:
+        pk = secp256k1.PublicKey(b"\x02" + self.raw_bytes, True)
+        return pk.schnorr_verify(bytes.fromhex(hash), bytes.fromhex(sig), None, True)
+
+class PrivateKey:
+    def __init__(self, raw_secret: bytes=None) -> None:
+        if not raw_secret is None:
+            self.raw_secret = raw_secret
+        else:
+            self.raw_secret = secrets.token_bytes(32)
+
+        sk = secp256k1.PrivateKey(self.raw_secret)
+        self.public_key = PublicKey(sk.pubkey.serialize()[1:])
+
+    def bech32(self) -> str:
+        converted_bits = bech32.convertbits(self.raw_secret, 8, 5)
+        return bech32.bech32_encode("nsec", converted_bits, bech32.Encoding.BECH32)
+
+    def hex(self) -> str:
+        return self.raw_secret.hex()
+
+    def tweak_add(self, scalar: bytes) -> bytes:
+        sk = secp256k1.PrivateKey(self.raw_secret)
+        return sk.tweak_add(scalar)
+
+    def compute_shared_secret(self, public_key_hex: str) -> bytes:
+        pk = secp256k1.PublicKey(bytes.fromhex("02" + public_key_hex), True)
+        return pk.ecdh(self.raw_secret, hashfn=copy_x)
+
+    def encrypt_message(self, message: str, public_key_hex: str) -> str:
+        padder = padding.PKCS7(128).padder()
+        padded_data = padder.update(message.encode()) + padder.finalize()
+
+        iv = secrets.token_bytes(16)
+        cipher = Cipher(algorithms.AES(self.compute_shared_secret(public_key_hex)), modes.CBC(iv))
+
+        encryptor = cipher.encryptor()
+        encrypted_message = encryptor.update(padded_data) + encryptor.finalize()
+
+        return f"{base64.b64encode(encrypted_message).decode()}?iv={base64.b64encode(iv).decode()}"
+
+    def decrypt_message(self, encoded_message: str, public_key_hex: str) -> str:
+        encoded_data = encoded_message.split('?iv=')
+        encoded_content, encoded_iv = encoded_data[0], encoded_data[1]
+
+        iv = base64.b64decode(encoded_iv)
+        cipher = Cipher(algorithms.AES(self.compute_shared_secret(public_key_hex)), modes.CBC(iv))
+        encrypted_content = base64.b64decode(encoded_content)
+
+        decryptor = cipher.decryptor()
+        decrypted_message = decryptor.update(encrypted_content) + decryptor.finalize()
+
+        unpadder = padding.PKCS7(128).unpadder()
+        unpadded_data = unpadder.update(decrypted_message) + unpadder.finalize()
+
+        return unpadded_data.decode()
+
+    def sign_message_hash(self, hash: bytes) -> str:
+        sk = secp256k1.PrivateKey(self.raw_secret)
+        sig = sk.schnorr_sign(hash, None, raw=True)
+        return sig.hex()
+
+ffi = FFI()
+@ffi.callback("int (unsigned char *, const unsigned char *, const unsigned char *, void *)")
+def copy_x(output, x32, y32, data):
+    ffi.memmove(output, x32, 32)
+    return 1

nostr/nostr/message_pool.py

@@ -0,0 +1,78 @@
+import json
+from queue import Queue
+from threading import Lock
+from .message_type import RelayMessageType
+from .event import Event
+
+
+class EventMessage:
+    def __init__(self, event: Event, subscription_id: str, url: str) -> None:
+        self.event = event
+        self.subscription_id = subscription_id
+        self.url = url
+
+
+class NoticeMessage:
+    def __init__(self, content: str, url: str) -> None:
+        self.content = content
+        self.url = url
+
+
+class EndOfStoredEventsMessage:
+    def __init__(self, subscription_id: str, url: str) -> None:
+        self.subscription_id = subscription_id
+        self.url = url
+
+
+class MessagePool:
+    def __init__(self) -> None:
+        self.events: Queue[EventMessage] = Queue()
+        self.notices: Queue[NoticeMessage] = Queue()
+        self.eose_notices: Queue[EndOfStoredEventsMessage] = Queue()
+        self._unique_events: set = set()
+        self.lock: Lock = Lock()
+
+    def add_message(self, message: str, url: str):
+        self._process_message(message, url)
+
+    def get_event(self):
+        return self.events.get()
+
+    def get_notice(self):
+        return self.notices.get()
+
+    def get_eose_notice(self):
+        return self.eose_notices.get()
+
+    def has_events(self):
+        return self.events.qsize() > 0
+
+    def has_notices(self):
+        return self.notices.qsize() > 0
+
+    def has_eose_notices(self):
+        return self.eose_notices.qsize() > 0
+
+    def _process_message(self, message: str, url: str):
+        message_json = json.loads(message)
+        message_type = message_json[0]
+        if message_type == RelayMessageType.EVENT:
+            subscription_id = message_json[1]
+            e = message_json[2]
+            event = Event(
+                e["pubkey"],
+                e["content"],
+                e["created_at"],
+                e["kind"],
+                e["tags"],
+                e["id"],
+                e["sig"],
+            )
+            with self.lock:
+                if not event.id in self._unique_events:
+                    self.events.put(EventMessage(event, subscription_id, url))
+                    self._unique_events.add(event.id)
+        elif message_type == RelayMessageType.NOTICE:
+            self.notices.put(NoticeMessage(message_json[1], url))
+        elif message_type == RelayMessageType.END_OF_STORED_EVENTS:
+            self.eose_notices.put(EndOfStoredEventsMessage(message_json[1], url))

nostr/nostr/message_type.py

@@ -0,0 +1,15 @@
+class ClientMessageType:
+    EVENT = "EVENT"
+    REQUEST = "REQ"
+    CLOSE = "CLOSE"
+
+class RelayMessageType:
+    EVENT = "EVENT"
+    NOTICE = "NOTICE"
+    END_OF_STORED_EVENTS = "EOSE"
+
+    @staticmethod
+    def is_valid(type: str) -> bool:
+        if type == RelayMessageType.EVENT or type == RelayMessageType.NOTICE or type == RelayMessageType.END_OF_STORED_EVENTS:
+            return True
+        return False

nostr/nostr/relay.py

@@ -0,0 +1,123 @@
+import json
+from threading import Lock
+from websocket import WebSocketApp
+from .event import Event
+from .filter import Filters
+from .message_pool import MessagePool
+from .message_type import RelayMessageType
+from .subscription import Subscription
+
+
+class RelayPolicy:
+    def __init__(self, should_read: bool = True, should_write: bool = True) -> None:
+        self.should_read = should_read
+        self.should_write = should_write
+
+    def to_json_object(self) -> dict[str, bool]:
+        return {"read": self.should_read, "write": self.should_write}
+
+
+class Relay:
+    def __init__(
+        self,
+        url: str,
+        policy: RelayPolicy,
+        message_pool: MessagePool,
+        subscriptions: dict[str, Subscription] = {},
+    ) -> None:
+        self.url = url
+        self.policy = policy
+        self.message_pool = message_pool
+        self.subscriptions = subscriptions
+        self.lock = Lock()
+        self.ws = WebSocketApp(
+            url,
+            on_open=self._on_open,
+            on_message=self._on_message,
+            on_error=self._on_error,
+            on_close=self._on_close,
+        )
+
+    def connect(self, ssl_options: dict = None):
+        self.ws.run_forever(sslopt=ssl_options)
+
+    def close(self):
+        self.ws.close()
+
+    def publish(self, message: str):
+        self.ws.send(message)
+
+    def add_subscription(self, id, filters: Filters):
+        with self.lock:
+            self.subscriptions[id] = Subscription(id, filters)
+
+    def close_subscription(self, id: str) -> None:
+        with self.lock:
+            self.subscriptions.pop(id)
+
+    def update_subscription(self, id: str, filters: Filters) -> None:
+        with self.lock:
+            subscription = self.subscriptions[id]
+            subscription.filters = filters
+
+    def to_json_object(self) -> dict:
+        return {
+            "url": self.url,
+            "policy": self.policy.to_json_object(),
+            "subscriptions": [
+                subscription.to_json_object()
+                for subscription in self.subscriptions.values()
+            ],
+        }
+
+    def _on_open(self, class_obj):
+        pass
+
+    def _on_close(self, class_obj, status_code, message):
+        pass
+
+    def _on_message(self, class_obj, message: str):
+        if self._is_valid_message(message):
+            self.message_pool.add_message(message, self.url)
+
+    def _on_error(self, class_obj, error):
+        pass
+
+    def _is_valid_message(self, message: str) -> bool:
+        message = message.strip("\n")
+        if not message or message[0] != "[" or message[-1] != "]":
+            return False
+
+        message_json = json.loads(message)
+        message_type = message_json[0]
+        if not RelayMessageType.is_valid(message_type):
+            return False
+        if message_type == RelayMessageType.EVENT:
+            if not len(message_json) == 3:
+                return False
+
+            subscription_id = message_json[1]
+            with self.lock:
+                if subscription_id not in self.subscriptions:
+                    return False
+
+            e = message_json[2]
+            event = Event(
+                e["pubkey"],
+                e["content"],
+                e["created_at"],
+                e["kind"],
+                e["tags"],
+                e["id"],
+                e["sig"],
+            )
+            if not event.verify():
+                return False
+
+            with self.lock:
+                subscription = self.subscriptions[subscription_id]
+
+            if not subscription.filters.match(event):
+                return False
+
+        return True

nostr/nostr/relay_manager.py

@@ -0,0 +1,43 @@
+import threading
+from .filter import Filters
+from .message_pool import MessagePool
+from .relay import Relay, RelayPolicy
+
+class RelayManager:
+    def __init__(self) -> None:
+        self.relays: dict[str, Relay] = {}
+        self.message_pool = MessagePool()
+
+    def add_relay(self, url: str, read: bool=True, write: bool=True, subscriptions={}):
+        policy = RelayPolicy(read, write)
+        relay = Relay(url, policy, self.message_pool, subscriptions)
+        self.relays[url] = relay
+
+    def remove_relay(self, url: str):
+        self.relays.pop(url)
+
+    def add_subscription(self, id: str, filters: Filters):
+        for relay in self.relays.values():
+            relay.add_subscription(id, filters)
+
+    def close_subscription(self, id: str):
+        for relay in self.relays.values():
+            relay.close_subscription(id)
+
+    def open_connections(self, ssl_options: dict=None):
+        for relay in self.relays.values():
+            threading.Thread(
+                target=relay.connect,
+                args=(ssl_options,),
+                name=f"{relay.url}-thread"
+            ).start()
+
+    def close_connections(self):
+        for relay in self.relays.values():
+            relay.close()
+
+    def publish_message(self, message: str):
+        for relay in self.relays.values():
+            if relay.policy.should_write:
+                relay.publish(message)
+            

nostr/nostr/subscription.py

@@ -0,0 +1,12 @@
+from .filter import Filters
+
+class Subscription:
+    def __init__(self, id: str, filters: Filters=None) -> None:
+        self.id = id
+        self.filters = filters
+
+    def to_json_object(self):
+        return { 
+            "id": self.id, 
+            "filters": self.filters.to_json_array() 
+        }

nostr/relay.py

@@ -0,0 +1,124 @@
+import json
+from threading import Lock
+from websocket import WebSocketApp
+from .event import Event
+from .filter import Filters
+from .message_pool import MessagePool
+from .message_type import RelayMessageType
+from .subscription import Subscription
+
+
+class RelayPolicy:
+    def __init__(self, should_read: bool = True, should_write: bool = True) -> None:
+        self.should_read = should_read
+        self.should_write = should_write
+
+    def to_json_object(self) -> dict[str, bool]:
+        return {"read": self.should_read, "write": self.should_write}
+
+
+class Relay:
+    def __init__(
+        self,
+        url: str,
+        policy: RelayPolicy,
+        message_pool: MessagePool,
+        subscriptions: dict[str, Subscription] = {},
+    ) -> None:
+        self.url = url
+        self.policy = policy
+        self.message_pool = message_pool
+        self.subscriptions = subscriptions
+        self.lock = Lock()
+        self.ws = WebSocketApp(
+            url,
+            on_open=self._on_open,
+            on_message=self._on_message,
+            on_error=self._on_error,
+            on_close=self._on_close,
+        )
+
+    def connect(self, ssl_options: dict = None):
+        self.ws.run_forever(sslopt=ssl_options)
+
+    def close(self):
+        self.ws.close()
+
+    def publish(self, message: str):
+        self.ws.send(message)
+
+    def add_subscription(self, id, filters: Filters):
+        with self.lock:
+            self.subscriptions[id] = Subscription(id, filters)
+
+    def close_subscription(self, id: str) -> None:
+        with self.lock:
+            self.subscriptions.pop(id)
+
+    def update_subscription(self, id: str, filters: Filters) -> None:
+        with self.lock:
+            subscription = self.subscriptions[id]
+            subscription.filters = filters
+
+    def to_json_object(self) -> dict:
+        return {
+            "url": self.url,
+            "policy": self.policy.to_json_object(),
+            "subscriptions": [
+                subscription.to_json_object()
+                for subscription in self.subscriptions.values()
+            ],
+        }
+
+    def _on_open(self, class_obj):
+        pass
+
+    def _on_close(self, class_obj, status_code, message):
+        pass
+
+    def _on_message(self, class_obj, message: str):
+        if self._is_valid_message(message):
+            self.message_pool.add_message(message, self.url)
+
+    def _on_error(self, class_obj, error):
+        # print(error)
+        pass
+
+    def _is_valid_message(self, message: str) -> bool:
+        message = message.strip("\n")
+        if not message or message[0] != "[" or message[-1] != "]":
+            return False
+
+        message_json = json.loads(message)
+        message_type = message_json[0]
+        if not RelayMessageType.is_valid(message_type):
+            return False
+        if message_type == RelayMessageType.EVENT:
+            if not len(message_json) == 3:
+                return False
+
+            subscription_id = message_json[1]
+            with self.lock:
+                if subscription_id not in self.subscriptions:
+                    return False
+
+            e = message_json[2]
+            event = Event(
+                e["pubkey"],
+                e["content"],
+                e["created_at"],
+                e["kind"],
+                e["tags"],
+                e["id"],
+                e["sig"],
+            )
+            if not event.verify():
+                return False
+
+            with self.lock:
+                subscription = self.subscriptions[subscription_id]
+
+            if not subscription.filters.match(event):
+                return False
+
+        return True

nostr/relay_manager.py

@@ -0,0 +1,43 @@
+import threading
+from .filter import Filters
+from .message_pool import MessagePool
+from .relay import Relay, RelayPolicy
+
+class RelayManager:
+    def __init__(self) -> None:
+        self.relays: dict[str, Relay] = {}
+        self.message_pool = MessagePool()
+
+    def add_relay(self, url: str, read: bool=True, write: bool=True, subscriptions={}):
+        policy = RelayPolicy(read, write)
+        relay = Relay(url, policy, self.message_pool, subscriptions)
+        self.relays[url] = relay
+
+    def remove_relay(self, url: str):
+        self.relays.pop(url)
+
+    def add_subscription(self, id: str, filters: Filters):
+        for relay in self.relays.values():
+            relay.add_subscription(id, filters)
+
+    def close_subscription(self, id: str):
+        for relay in self.relays.values():
+            relay.close_subscription(id)
+
+    def open_connections(self, ssl_options: dict=None):
+        for relay in self.relays.values():
+            threading.Thread(
+                target=relay.connect,
+                args=(ssl_options,),
+                name=f"{relay.url}-thread"
+            ).start()
+
+    def close_connections(self):
+        for relay in self.relays.values():
+            relay.close()
+
+    def publish_message(self, message: str):
+        for relay in self.relays.values():
+            if relay.policy.should_write:
+                relay.publish(message)
+            

nostr/subscription.py

@@ -0,0 +1,12 @@
+from .filter import Filters
+
+class Subscription:
+    def __init__(self, id: str, filters: Filters=None) -> None:
+        self.id = id
+        self.filters = filters
+
+    def to_json_object(self):
+        return { 
+            "id": self.id, 
+            "filters": self.filters.to_json_array() 
+        }

poetry.lock

@@ -133,6 +133,25 @@ tomli = {version = "*", optional = true, markers = "python_full_version <= \"3.1
 [package.extras]
 toml = ["tomli"]
 
+[[package]]
+name = "cryptography"
+version = "38.0.4"
+description = "cryptography is a package which provides cryptographic recipes and primitives to Python developers."
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+cffi = ">=1.12"
+
+[package.extras]
+docs = ["sphinx (>=1.6.5,!=1.8.0,!=3.1.0,!=3.1.1)", "sphinx-rtd-theme"]
+docstest = ["pyenchant (>=1.6.11)", "sphinxcontrib-spelling (>=4.0.1)", "twine (>=1.12.0)"]
+pep8test = ["black", "flake8", "flake8-import-order", "pep8-naming"]
+sdist = ["setuptools-rust (>=0.11.4)"]
+ssh = ["bcrypt (>=3.1.5)"]
+test = ["hypothesis (>=1.11.4,!=3.79.2)", "iso8601", "pretend", "pytest (>=6.2.0)", "pytest-benchmark", "pytest-cov", "pytest-subtests", "pytest-xdist", "pytz"]
+
 [[package]]
 name = "ecdsa"
 version = "0.18.0"
@@ -371,6 +390,14 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
+[[package]]
+name = "pycryptodomex"
+version = "3.16.0"
+description = "Cryptographic library for Python"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+
 [[package]]
 name = "pydantic"
 version = "1.10.2"
@@ -640,6 +667,19 @@ typing-extensions = {version = "*", markers = "python_version < \"3.8\""}
 [package.extras]
 standard = ["colorama (>=0.4)", "httptools (>=0.4.0)", "python-dotenv (>=0.13)", "pyyaml (>=5.1)", "uvloop (>=0.14.0,!=0.15.0,!=0.15.1)", "watchfiles (>=0.13)", "websockets (>=10.0)"]
 
+[[package]]
+name = "websocket-client"
+version = "1.3.3"
+description = "WebSocket client for Python with low level API options"
+category = "main"
+optional = false
+python-versions = ">=3.7"
+
+[package.extras]
+docs = ["Sphinx (>=3.4)", "sphinx-rtd-theme (>=0.5)"]
+optional = ["python-socks", "wsaccel"]
+test = ["websockets"]
+
 [[package]]
 name = "win32-setctime"
 version = "1.1.0"
@@ -666,7 +706,7 @@ testing = ["flake8 (<5)", "func-timeout", "jaraco.functools", "jaraco.itertools"
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.7"
-content-hash = "aa0c3cf3a023b4143939128be203cf0c519341abc7cd7ef0b200694f8b925b78"
+content-hash = "d26c1683860705c1936769b5baade31986d00b3318092971ebaed265a138fb96"
 
 [metadata.files]
 anyio = [
@@ -843,6 +883,34 @@ coverage = [
     {file = "coverage-6.5.0-pp36.pp37.pp38-none-any.whl", hash = "sha256:1431986dac3923c5945271f169f59c45b8802a114c8f548d611f2015133df77a"},
     {file = "coverage-6.5.0.tar.gz", hash = "sha256:f642e90754ee3e06b0e7e51bce3379590e76b7f76b708e1a71ff043f87025c84"},
 ]
+cryptography = [
+    {file = "cryptography-38.0.4-cp36-abi3-macosx_10_10_universal2.whl", hash = "sha256:2fa36a7b2cc0998a3a4d5af26ccb6273f3df133d61da2ba13b3286261e7efb70"},
+    {file = "cryptography-38.0.4-cp36-abi3-macosx_10_10_x86_64.whl", hash = "sha256:1f13ddda26a04c06eb57119caf27a524ccae20533729f4b1e4a69b54e07035eb"},
+    {file = "cryptography-38.0.4-cp36-abi3-manylinux_2_17_aarch64.manylinux2014_aarch64.manylinux_2_24_aarch64.whl", hash = "sha256:2ec2a8714dd005949d4019195d72abed84198d877112abb5a27740e217e0ea8d"},
+    {file = "cryptography-38.0.4-cp36-abi3-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:50a1494ed0c3f5b4d07650a68cd6ca62efe8b596ce743a5c94403e6f11bf06c1"},
+    {file = "cryptography-38.0.4-cp36-abi3-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:a10498349d4c8eab7357a8f9aa3463791292845b79597ad1b98a543686fb1ec8"},
+    {file = "cryptography-38.0.4-cp36-abi3-manylinux_2_24_x86_64.whl", hash = "sha256:10652dd7282de17990b88679cb82f832752c4e8237f0c714be518044269415db"},
+    {file = "cryptography-38.0.4-cp36-abi3-manylinux_2_28_aarch64.whl", hash = "sha256:bfe6472507986613dc6cc00b3d492b2f7564b02b3b3682d25ca7f40fa3fd321b"},
+    {file = "cryptography-38.0.4-cp36-abi3-manylinux_2_28_x86_64.whl", hash = "sha256:ce127dd0a6a0811c251a6cddd014d292728484e530d80e872ad9806cfb1c5b3c"},
+    {file = "cryptography-38.0.4-cp36-abi3-musllinux_1_1_aarch64.whl", hash = "sha256:53049f3379ef05182864d13bb9686657659407148f901f3f1eee57a733fb4b00"},
+    {file = "cryptography-38.0.4-cp36-abi3-musllinux_1_1_x86_64.whl", hash = "sha256:8a4b2bdb68a447fadebfd7d24855758fe2d6fecc7fed0b78d190b1af39a8e3b0"},
+    {file = "cryptography-38.0.4-cp36-abi3-win32.whl", hash = "sha256:1d7e632804a248103b60b16fb145e8df0bc60eed790ece0d12efe8cd3f3e7744"},
+    {file = "cryptography-38.0.4-cp36-abi3-win_amd64.whl", hash = "sha256:8e45653fb97eb2f20b8c96f9cd2b3a0654d742b47d638cf2897afbd97f80fa6d"},
+    {file = "cryptography-38.0.4-pp37-pypy37_pp73-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:ca57eb3ddaccd1112c18fc80abe41db443cc2e9dcb1917078e02dfa010a4f353"},
+    {file = "cryptography-38.0.4-pp37-pypy37_pp73-manylinux_2_24_x86_64.whl", hash = "sha256:c9e0d79ee4c56d841bd4ac6e7697c8ff3c8d6da67379057f29e66acffcd1e9a7"},
+    {file = "cryptography-38.0.4-pp37-pypy37_pp73-manylinux_2_28_x86_64.whl", hash = "sha256:0e70da4bdff7601b0ef48e6348339e490ebfb0cbe638e083c9c41fb49f00c8bd"},
+    {file = "cryptography-38.0.4-pp38-pypy38_pp73-macosx_10_10_x86_64.whl", hash = "sha256:998cd19189d8a747b226d24c0207fdaa1e6658a1d3f2494541cb9dfbf7dcb6d2"},
+    {file = "cryptography-38.0.4-pp38-pypy38_pp73-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:67461b5ebca2e4c2ab991733f8ab637a7265bb582f07c7c88914b5afb88cb95b"},
+    {file = "cryptography-38.0.4-pp38-pypy38_pp73-manylinux_2_24_x86_64.whl", hash = "sha256:4eb85075437f0b1fd8cd66c688469a0c4119e0ba855e3fef86691971b887caf6"},
+    {file = "cryptography-38.0.4-pp38-pypy38_pp73-manylinux_2_28_x86_64.whl", hash = "sha256:3178d46f363d4549b9a76264f41c6948752183b3f587666aff0555ac50fd7876"},
+    {file = "cryptography-38.0.4-pp38-pypy38_pp73-win_amd64.whl", hash = "sha256:6391e59ebe7c62d9902c24a4d8bcbc79a68e7c4ab65863536127c8a9cd94043b"},
+    {file = "cryptography-38.0.4-pp39-pypy39_pp73-macosx_10_10_x86_64.whl", hash = "sha256:78e47e28ddc4ace41dd38c42e6feecfdadf9c3be2af389abbfeef1ff06822285"},
+    {file = "cryptography-38.0.4-pp39-pypy39_pp73-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:2fb481682873035600b5502f0015b664abc26466153fab5c6bc92c1ea69d478b"},
+    {file = "cryptography-38.0.4-pp39-pypy39_pp73-manylinux_2_24_x86_64.whl", hash = "sha256:4367da5705922cf7070462e964f66e4ac24162e22ab0a2e9d31f1b270dd78083"},
+    {file = "cryptography-38.0.4-pp39-pypy39_pp73-manylinux_2_28_x86_64.whl", hash = "sha256:b4cad0cea995af760f82820ab4ca54e5471fc782f70a007f31531957f43e9dee"},
+    {file = "cryptography-38.0.4-pp39-pypy39_pp73-win_amd64.whl", hash = "sha256:80ca53981ceeb3241998443c4964a387771588c4e4a5d92735a493af868294f9"},
+    {file = "cryptography-38.0.4.tar.gz", hash = "sha256:175c1a818b87c9ac80bb7377f5520b7f31b3ef2a0004e2420319beadedb67290"},
+]
 ecdsa = [
     {file = "ecdsa-0.18.0-py2.py3-none-any.whl", hash = "sha256:80600258e7ed2f16b9aa1d7c295bd70194109ad5a30fdee0eaeefef1d4c559dd"},
     {file = "ecdsa-0.18.0.tar.gz", hash = "sha256:190348041559e21b22a1d65cee485282ca11a6f81d503fddb84d5017e9ed1e49"},
@@ -940,6 +1008,34 @@ pycparser = [
     {file = "pycparser-2.21-py2.py3-none-any.whl", hash = "sha256:8ee45429555515e1f6b185e78100aea234072576aa43ab53aefcae078162fca9"},
     {file = "pycparser-2.21.tar.gz", hash = "sha256:e644fdec12f7872f86c58ff790da456218b10f863970249516d60a5eaca77206"},
 ]
+pycryptodomex = [
+    {file = "pycryptodomex-3.16.0-cp27-cp27m-macosx_10_9_x86_64.whl", hash = "sha256:b3d04c00d777c36972b539fb79958790126847d84ec0129fce1efef250bfe3ce"},
+    {file = "pycryptodomex-3.16.0-cp27-cp27m-manylinux2010_i686.whl", hash = "sha256:e5a670919076b71522c7d567a9043f66f14b202414a63c3a078b5831ae342c03"},
+    {file = "pycryptodomex-3.16.0-cp27-cp27m-manylinux2010_x86_64.whl", hash = "sha256:ce338a9703f54b2305a408fc9890eb966b727ce72b69f225898bb4e9d9ed3f1f"},
+    {file = "pycryptodomex-3.16.0-cp27-cp27m-manylinux2014_aarch64.whl", hash = "sha256:a1c0ae7123448ecb034c75c713189cb00ebe2d415b11682865b6c54d200d9c93"},
+    {file = "pycryptodomex-3.16.0-cp27-cp27m-win32.whl", hash = "sha256:8851585ff19871e5d69e1790f4ca5f6fd1699d6b8b14413b472a4c0dbc7ea780"},
+    {file = "pycryptodomex-3.16.0-cp27-cp27m-win_amd64.whl", hash = "sha256:8dd2d9e3c617d0712ed781a77efd84ea579e76c5f9b2a4bc0b684ebeddf868b2"},
+    {file = "pycryptodomex-3.16.0-cp27-cp27mu-manylinux2010_i686.whl", hash = "sha256:2ad9bb86b355b6104796567dd44c215b3dc953ef2fae5e0bdfb8516731df92cf"},
+    {file = "pycryptodomex-3.16.0-cp27-cp27mu-manylinux2010_x86_64.whl", hash = "sha256:e25a2f5667d91795f9417cb856f6df724ccdb0cdd5cbadb212ee9bf43946e9f8"},
+    {file = "pycryptodomex-3.16.0-cp27-cp27mu-manylinux2014_aarch64.whl", hash = "sha256:b0789a8490114a2936ed77c87792cfe77582c829cb43a6d86ede0f9624ba8aa3"},
+    {file = "pycryptodomex-3.16.0-cp35-abi3-macosx_10_9_x86_64.whl", hash = "sha256:0da835af786fdd1c9930994c78b23e88d816dc3f99aa977284a21bbc26d19735"},
+    {file = "pycryptodomex-3.16.0-cp35-abi3-manylinux2014_aarch64.whl", hash = "sha256:22aed0868622d95179217c298e37ed7410025c7b29dac236d3230617d1e4ed56"},
+    {file = "pycryptodomex-3.16.0-cp35-abi3-manylinux_2_5_i686.manylinux1_i686.manylinux_2_12_i686.manylinux2010_i686.whl", hash = "sha256:1619087fb5b31510b0b0b058a54f001a5ffd91e6ffee220d9913064519c6a69d"},
+    {file = "pycryptodomex-3.16.0-cp35-abi3-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_12_x86_64.manylinux2010_x86_64.whl", hash = "sha256:70288d9bfe16b2fd0d20b6c365db614428f1bcde7b20d56e74cf88ade905d9eb"},
+    {file = "pycryptodomex-3.16.0-cp35-abi3-musllinux_1_1_aarch64.whl", hash = "sha256:7993d26dae4d83b8f4ce605bb0aecb8bee330bb3c95475ef06f3694403621e71"},
+    {file = "pycryptodomex-3.16.0-cp35-abi3-musllinux_1_1_i686.whl", hash = "sha256:1cda60207be8c1cf0b84b9138f9e3ca29335013d2b690774a5e94678ff29659a"},
+    {file = "pycryptodomex-3.16.0-cp35-abi3-musllinux_1_1_x86_64.whl", hash = "sha256:04610536921c1ec7adba158ef570348550c9f3a40bc24be9f8da2ef7ab387981"},
+    {file = "pycryptodomex-3.16.0-cp35-abi3-win32.whl", hash = "sha256:daa67f5ebb6fbf1ee9c90decaa06ca7fc88a548864e5e484d52b0920a57fe8a5"},
+    {file = "pycryptodomex-3.16.0-cp35-abi3-win_amd64.whl", hash = "sha256:231dc8008cbdd1ae0e34645d4523da2dbc7a88c325f0d4a59635a86ee25b41dd"},
+    {file = "pycryptodomex-3.16.0-pp27-pypy_73-macosx_10_9_x86_64.whl", hash = "sha256:4dbbe18cc232b5980c7633972ae5417d0df76fe89e7db246eefd17ef4d8e6d7a"},
+    {file = "pycryptodomex-3.16.0-pp27-pypy_73-manylinux2010_x86_64.whl", hash = "sha256:893f8a97d533c66cc3a56e60dd3ed40a3494ddb4aafa7e026429a08772f8a849"},
+    {file = "pycryptodomex-3.16.0-pp27-pypy_73-win32.whl", hash = "sha256:6a465e4f856d2a4f2a311807030c89166529ccf7ccc65bef398de045d49144b6"},
+    {file = "pycryptodomex-3.16.0-pp37-pypy37_pp73-macosx_10_9_x86_64.whl", hash = "sha256:ba57ac7861fd2c837cdb33daf822f2a052ff57dd769a2107807f52a36d0e8d38"},
+    {file = "pycryptodomex-3.16.0-pp37-pypy37_pp73-manylinux_2_5_i686.manylinux1_i686.manylinux_2_12_i686.manylinux2010_i686.whl", hash = "sha256:f2b971a7b877348a27dcfd0e772a0343fb818df00b74078e91c008632284137d"},
+    {file = "pycryptodomex-3.16.0-pp37-pypy37_pp73-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_12_x86_64.manylinux2010_x86_64.whl", hash = "sha256:e2453162f473c1eae4826eb10cd7bce19b5facac86d17fb5f29a570fde145abd"},
+    {file = "pycryptodomex-3.16.0-pp37-pypy37_pp73-win_amd64.whl", hash = "sha256:0ba28aa97cdd3ff5ed1a4f2b7f5cd04e721166bd75bd2b929e2734433882b583"},
+    {file = "pycryptodomex-3.16.0.tar.gz", hash = "sha256:e9ba9d8ed638733c9e95664470b71d624a6def149e2db6cc52c1aca5a6a2df1d"},
+]
 pydantic = [
     {file = "pydantic-1.10.2-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:bb6ad4489af1bac6955d38ebcb95079a836af31e4c4f74aba1ca05bb9f6027bd"},
     {file = "pydantic-1.10.2-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:a1f5a63a6dfe19d719b1b6e6106561869d2efaca6167f84f5ab9347887d78b98"},
@@ -1134,6 +1230,10 @@ uvicorn = [
     {file = "uvicorn-0.18.3-py3-none-any.whl", hash = "sha256:0abd429ebb41e604ed8d2be6c60530de3408f250e8d2d84967d85ba9e86fe3af"},
     {file = "uvicorn-0.18.3.tar.gz", hash = "sha256:9a66e7c42a2a95222f76ec24a4b754c158261c4696e683b9dadc72b590e0311b"},
 ]
+websocket-client = [
+    {file = "websocket-client-1.3.3.tar.gz", hash = "sha256:d58c5f284d6a9bf8379dab423259fe8f85b70d5fa5d2916d5791a84594b122b1"},
+    {file = "websocket_client-1.3.3-py3-none-any.whl", hash = "sha256:5d55652dc1d0b3c734f044337d929aaf83f4f9138816ec680c1aefefb4dc4877"},
+]
 win32-setctime = [
     {file = "win32_setctime-1.1.0-py3-none-any.whl", hash = "sha256:231db239e959c2fe7eb1d7dc129f11172354f98361c4fa2d6d2d7e278baa8aad"},
     {file = "win32_setctime-1.1.0.tar.gz", hash = "sha256:15cf5750465118d6929ae4de4eb46e8edae9a5634350c01ba582df868e932cb2"},

pyproject.toml

@@ -24,6 +24,9 @@ sqlalchemy-aio = "^0.17.0"
 python-bitcoinlib = "^0.11.2"
 h11 = "0.12.0"
 PySocks = "^1.7.1"
+cryptography = "^38.0.4"
+websocket-client = "1.3.3"
+pycryptodomex = "^3.16.0"
 
 [tool.poetry.dev-dependencies]
 black = {version = "^22.8.0", allow-prereleases = true}