Get each new Stripe sale by email and WhatsApp

from google.oauth2.credentials import Credentials
from googleapiclient.discovery import build
import base64
from clickruntime import on_event, credentials, http, verify, state

ME_EMAIL = "me@example.com"
MY_PHONE = "447700900123"
WA = "https://graph.facebook.com/v20.0/your-phone-number-id/messages"

def wa(to, text):
    http.post(WA, headers={"Authorization": f"Bearer {credentials.secret('WHATSAPP_TOKEN')}"},
              json={"messaging_product": "whatsapp", "to": to, "type": "text", "text": {"body": text}}).raise_for_status()
gmail = lambda: build("gmail", "v1", credentials=Credentials(credentials.connection("google", "work")), cache_discovery=False).users()

def send_email(to, subject, text):
    raw = base64.urlsafe_b64encode(f"To: {to}\r\nSubject: {subject}\r\n\r\n{text}".encode()).decode()
    gmail().messages().send(userId="me", body={"raw": raw}).execute()

@on_event
def handle(event):
    if not verify.stripe(event.body, event.header("Stripe-Signature"), credentials.secret("STRIPE_WEBHOOK_SECRET")):
        return {"skipped": "bad signature"}
    s = event.json["data"]["object"]
    if event.json["type"] != "checkout.session.completed" or state.get(s["id"]):
        return {"skipped": True}
    amount = f"{s['amount_total'] / 100:,.2f} {s['currency'].upper()}"
    who = (s.get("customer_details") or {}).get("email", "unknown")
    send_email(ME_EMAIL, f"New sale: {amount}", f"Customer: {who}\nSession: {s['id']}")
    wa(MY_PHONE, f"💰 New sale {amount} from {who}")
    state.set(s["id"], True)
    return {"sale": s["id"]}