Get an email for every eBay sale

from datetime import datetime, timedelta, timezone
from clickruntime import on_trigger, credentials, http, state, notify, report_fetched

@on_trigger
def run(event):
    now = datetime.now(timezone.utc)
    since = state.get("since") or (now - timedelta(minutes=10)).strftime("%Y-%m-%dT%H:%M:%S.000Z")
    resp = http.get("https://api.ebay.com/sell/fulfillment/v1/order",
                    headers={"Authorization": f"Bearer {credentials.connection('ebay', 'seller')}"},
                    params={"filter": f"creationdate:[{since}..]", "limit": 50})
    resp.raise_for_status()
    seen = set(state.get("seen") or [])
    orders = [o for o in resp.json().get("orders", []) if o["orderId"] not in seen]
    report_fetched(len(orders))
    if not orders:
        return {"new": 0}
    for o in orders:
        for item in o["lineItems"]:
            notify.email_me(f"eBay sale: {item['title'][:80]}",
                            f"{item['quantity']}× {item['title']}\n"
                            f"Price: {item['total']['currency']} {item['total']['value']}\nBuyer: {o['buyer']['username']}")
    state.set("seen", (list(seen) + [o["orderId"] for o in orders])[-500:])
    state.set("since", max(o["creationDate"] for o in orders))
    return {"new": len(orders)}