user custom private key

__init__.py

@@ -12,8 +12,21 @@ from loguru import logger
 
 from .nostr.event import Event
 from .nostr.key import PrivateKey, PublicKey
+from environs import Env
 
-nostr_privatekey = PrivateKey()
+
+def generate_keys(private_key: str = ""):
+    if private_key.startswith("nsec"):
+        return PrivateKey.from_nsec(private_key)
+    elif private_key:
+        return PrivateKey(bytes.fromhex(private_key))
+    else:
+        return PrivateKey()  # generate random key
+
+
+env = Env()
+env.read_env()
+nostr_privatekey = generate_keys(env.str("LNURLP_ZAP_NOSTR_PRIVATEKEY", default=""))
 nostr_publickey: PublicKey = nostr_privatekey.public_key
 logger.debug(f"LNURLP Zaps Nostr pubkey: {nostr_publickey.hex()}")