HypurrScan Auto Wallet in Market URL

gistfile1.txt

// ==UserScript==
// @name         HypurrScan Auto Wallet in Market URL
// @namespace    hypurrscan-wallet-url
// @version      3.0
// @description  Remembers the address from /address/0x... pages and appends it to /market/TICKER pages
// @match        https://hypurrscan.io/*
// @grant        GM_setValue
// @grant        GM_getValue
// @run-at       document-idle
// ==/UserScript==

(function () {
  'use strict';

  const DEBUG = true; // set to false once it's working
  const log = (...args) => DEBUG && console.log('[hypurrscan-wallet]', ...args);

  const ADDR_KEY = 'hypurrscan_last_address';
  const ADDR_REGEX = /^0x[a-fA-F0-9]{40}$/;

  function extractAddressFromPath(pathname) {
    const parts = pathname.split('/').filter(Boolean);
    if (parts.length >= 2 && parts[0] === 'address' && ADDR_REGEX.test(parts[1])) {
      return parts[1];
    }
    return null;
  }

  function isBareMarketPath(pathname) {
    const parts = pathname.split('/').filter(Boolean);
    return parts.length === 2 && parts[0] === 'market' ? parts[1] : null;
  }

  async function handleUrlChange() {
    const pathname = window.location.pathname;
    log('checking path:', pathname);

    const addr = extractAddressFromPath(pathname);
    if (addr) {
      await GM_setValue(ADDR_KEY, addr);
      log('stored address:', addr);
      return;
    }

    const token = isBareMarketPath(pathname);
    if (token) {
      const savedAddr = await GM_getValue(ADDR_KEY, null);
      log('bare market path for', token, '- saved address is', savedAddr);
      if (savedAddr) {
        const newUrl = `${window.location.origin}/market/${token}/${savedAddr}${window.location.hash || ''}`;
        log('redirecting to', newUrl);
        window.location.replace(newUrl);
      } else {
        log('no saved address yet — visit an /address/0x... page first');
      }
    }
  }

  // Run once immediately
  handleUrlChange();

  // Method 1: patch history API (works for most SPA routers)
  function patch(fn) {
    return function (...args) {
      const result = fn.apply(this, args);
      window.dispatchEvent(new Event('hypurrscan-locationchange'));
      return result;
    };
  }
  history.pushState = patch(history.pushState);
  history.replaceState = patch(history.replaceState);
  window.addEventListener('popstate', handleUrlChange);
  window.addEventListener('hypurrscan-locationchange', handleUrlChange);

  // Method 2: polling fallback (catches routers our patch might miss)
  let lastPath = window.location.pathname;
  setInterval(() => {
    if (window.location.pathname !== lastPath) {
      lastPath = window.location.pathname;
      log('poll detected path change ->', lastPath);
      handleUrlChange();
    }
  }, 400);
})();