feat: automate access token generation via TOTP and PIN (#41, #24)

.gitignore

@@ -1,2 +1,5 @@
 # Ignore .pyc files
-*.pyc
+*.pyc
+
+# Ignore environment files
+.env

v3/python/.simple.env

@@ -0,0 +1,11 @@
+user_id=""
+client_id = ""
+secret_key = ""
+redirect_uri = "https://fyers.in/"
+response_type = "code"  
+totp_key=""
+pin1=''
+pin2=''
+pin3=''
+pin4=''
+access_token=''

v3/python/login/automate_access_token.py

@@ -0,0 +1,58 @@
+import os
+import pyotp
+import requests
+from urllib.parse import parse_qs, urlparse
+from fyers_apiv3 import fyersModel
+from dotenv import load_dotenv, set_key
+
+# Load environment variables from .simple.env in the parent directory
+env_path = os.path.join(os.path.dirname(os.path.dirname(__file__)), '.env')
+load_dotenv(env_path)
+
+def access_token_generator():
+    # Fetch credentials from environment
+    client_id = os.getenv("client_id")
+    app_id = client_id.split('-')[0]
+    app_type = client_id.split('-')[1] if '-' in client_id else "200"
+    fy_id = os.getenv("user_id", "").upper()
+    totp_key = os.getenv("totp_key")
+    pin = f"{os.getenv('pin1')}{os.getenv('pin2')}{os.getenv('pin3')}{os.getenv('pin4')}"
+    redirect_uri = os.getenv("redirect_uri")
+    secret_key = os.getenv("secret_key")
+
+    req = requests.Session()
+    BASE_2 = "https://api-t2.fyers.in/vagator/v2"
+    BASE_3 = "https://api-t1.fyers.in/api/v3"
+
+    try:
+        # 1. Send Login OTP
+        res = req.post(f"{BASE_2}/send_login_otp", json={"fy_id": fy_id, "app_id": "2"}).json()
+
+        # 2. Verify TOTP
+        res = req.post(f"{BASE_2}/verify_otp", json={"request_key": res["request_key"], "otp": pyotp.TOTP(totp_key).now()}).json()
+
+        # 3. Verify PIN
+        res = req.post(f"{BASE_2}/verify_pin", json={"request_key": res["request_key"], "identity_type": "pin", "identifier": pin}).json()
+        temp_token = res["data"]["access_token"]
+
+        # 4. Get Auth Code
+        payload = {"fyers_id": fy_id, "app_id": app_id, "redirect_uri": redirect_uri, "appType": app_type, "code_challenge": "", "state": "sample_state", "scope": "", "nonce": "", "response_type": "code", "create_cookie": True}
+        res = req.post(f"{BASE_3}/token", json=payload, headers={'Authorization': f'Bearer {temp_token}'})
+        auth_code = parse_qs(urlparse(res.json()["Url"]).query)['auth_code'][0]
+
+        # 5. Get Access Token
+        session = fyersModel.SessionModel(client_id=client_id, secret_key=secret_key, redirect_uri=redirect_uri, response_type='code', grant_type='authorization_code')
+        session.set_token(auth_code)
+        access_token = session.generate_token()["access_token"]
+
+        # 6. Save to .simple.env
+        set_key(env_path, "access_token", access_token)
+        print("Access token successfully generated and saved to .simple.env")
+        return access_token
+
+    except Exception as e:
+        print(f"Error generating token: {e}")
+        return None
+
+if __name__ == "__main__":
+    access_token_generator()