Win back abandoned carts by email, then text

from google.oauth2.credentials import Credentials
from googleapiclient.discovery import build
from twilio.rest import Client
import base64, time
from clickruntime import on_event, on_trigger, credentials, http, state

FROM = "+15005550006"

def sms(to, body):
    return Client(credentials.secret("TWILIO_ACCOUNT_SID"), credentials.secret("TWILIO_AUTH_TOKEN")).messages.create(to=to, from_=FROM, body=body)
gmail = lambda: build("gmail", "v1", credentials=Credentials(credentials.connection("google", "work")), cache_discovery=False).users()

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

@on_event
def handle(event):
    c, carts = event.json or {}, state.get("carts") or {}
    carts.pop(c.get("id"), None)
    if c.get("status") != "paid" and c.get("email"):
        carts[c["id"]] = {"email": c["email"], "phone": c.get("phone") if c.get("sms_ok") else None, "url": c.get("url"), "at": time.time(), "step": 0}
    state.set("carts", carts)
    return {"open": len(carts)}

@on_trigger
def run(event):
    carts = state.get("carts") or {}
    for cid, c in list(carts.items()):
        age = time.time() - c["at"]
        if c["step"] == 0 and age > 3600:
            send_email(c["email"], "You left something in your basket", f"Your basket is saved here: {c['url']}"); c["step"] = 1
        elif c["step"] == 1 and age > 86400:
            if c["phone"]: sms(c["phone"], f"Still thinking it over? Your basket is waiting: {c['url']}")
            carts.pop(cid)
    state.set("carts", carts)
    return {"open": len(carts)}