Python — Transaction Polling

import os, time, requests

API   = os.environ["AF_API"]
TOKEN = os.environ["AF_TOKEN"]

def wait_for(transaction_id, *, timeout=120, interval=2):
    deadline = time.time() + timeout
    while time.time() < deadline:
        r = requests.get(f"{API}/v1/transactions/{transaction_id}", timeout=5)
        r.raise_for_status()
        body = r.json()
        if body["is_complete"]:
            return body
        time.sleep(interval)
    raise TimeoutError(f"transaction {transaction_id} did not finalize")