inscriboor/extension/injected.js

(() => {
  if (window.inscriboor) return;
  const pending = new Map();
  window.addEventListener("message", event => {
    if (event.source !== window || event.data?.source !== "inscriboor-extension") return;
    const request = pending.get(event.data.id);
    if (!request) return;
    pending.delete(event.data.id);
    event.data.error ? request.reject(new Error(event.data.error)) : request.resolve(event.data.result);
  });
  const provider = Object.freeze({
    isInscriboor: true,
    request({ method, params = {} } = {}) {
      if (typeof method !== "string" || !method) return Promise.reject(new Error("A provider method is required."));
      const id = crypto.randomUUID();
      return new Promise((resolve, reject) => {
        pending.set(id, { resolve, reject });
        window.postMessage({ source: "inscriboor-page", id, method, params }, "*");
        setTimeout(() => {
          if (!pending.has(id)) return;
          pending.delete(id);
          reject(new Error("Inscriboor request timed out."));
        }, 120000);
      });
    }
  });
  Object.defineProperty(window, "inscriboor", { value: provider, configurable: false, writable: false });
  window.dispatchEvent(new Event("inscriboor#initialized"));
})();