import jwt
import time
import requests
import json

with open("your/path/to/jwt.hex", "r") as f:
    secret_hex = f.read().strip()
secret = bytes.fromhex(secret_hex)

payload = {
    "iat": int(time.time()),
    "exp": int(time.time()) + 60, 
    "iss": "engine-api"
}

token = jwt.encode(payload, secret, algorithm="HS256").decode("utf-8")

headers = {
    "Content-Type": "application/json",
    "Authorization": f"Bearer {token}"
}

data = {
    "jsonrpc": "2.0",
    "method": "engine_exchangeTransitionConfigurationV1",
    "params": [
        {
            "terminalTotalDifficulty": "0x0", # 0 
            "terminalBlockHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
            "terminalBlockNumber": "0x1",
        }
    ],
    "id": 0,
}


response = requests.post("http://localhost:8551", headers=headers, data=json.dumps(data))

print(f"Status Code: {response.status_code}")

print(f"Response:{response.text}")