Act on a verdict

def decide(result, context="inbox"):
    """Map a Bewary answer to an action. context: inbox, signup or link."""
    verdict = result["verdict"]
    if context == "signup":                # a throwaway address answers suspicious
        return "reject" if verdict in ("scam", "suspicious") else "accept"
    if verdict == "scam":
        return "block"
    if verdict == "safe":
        return "allow"
    return "warn"            # suspicious or unknown

import type { Envelope } from "./bewary"

export function decide(r: Envelope, context: "inbox" | "signup" | "link" = "inbox") {
  if (context === "signup") return r.verdict === "scam" || r.verdict === "suspicious" ? "reject" : "accept"
  if (r.verdict === "scam") return "block"
  if (r.verdict === "safe") return "allow"
  return "warn"              // suspicious or unknown
}

import time, requests

def bewary(method, path, timeout=10, max_wait=5, **kwargs):
    """One API call with the retries the API supports. max_wait is the longest Retry-After
    worth waiting for: keep it short in a request a person is waiting on."""
    r = None
    for attempt in range(3):
        try:
            r = requests.request(method, "https://api.bewary.app" + path, timeout=timeout, **kwargs)
        except (requests.Timeout, requests.ConnectionError):
            if attempt == 2:
                raise
            continue
        retry_after = r.headers.get("Retry-After", "")
        wait = int(retry_after) if retry_after.isdigit() else 2
        if r.status_code in (429, 503) and attempt < 2 and wait <= max_wait:
            time.sleep(wait)               # a daily-limit 429 waits hours: it is returned instead
            continue
        if r.status_code >= 500 and r.status_code != 503 and attempt == 0:
            continue                       # our failure: retry once
        return r
    return r