igneum/site/wallet-provider.js

/* The Igneum Wallet's page provider (8 October 2026): an EIP-1193 provider for a page when the Igneum Wallet runs on
 * the same machine. The wallet's engine listens on 127.0.0.1:26811 (its page bridge, app/igneum-wallet/src/bridge.rs);
 * this file POSTs JSON-RPC there with the X-Igneum-Bridge header (so the browser sends a CORS preflight the bridge
 * answers for the page's origin) and polls a request the wallet window has to answer (connect, send, sign) until the
 * person decides there. Nothing is signed on the page; the wallet shows the facts and asks in its own window.
 *
 *   <script src="/wallet-provider.js"></script>   before the page's own script
 *
 * Rules: a page that already has window.ethereum (MetaMask) keeps it; the Igneum provider is then window.igneum and is
 * announced through EIP-6963 (rdns network.igneum.wallet) so a wallet picker can list it. Without an injected wallet,
 * the Igneum provider is window.ethereum. A request while the wallet is not open rejects with code 4900. Errors come
 * back as {code, message} (EIP-1193 codes: 4001 declined, 4100 not connected, 4200 not offered, 4902 another chain).
 * Tests: site/wallet-provider.test.mjs. */
(function (win) {
  var BASE = 'http://127.0.0.1:26811', POLL_MS = 800, TICK_MS = 4000;
  var seq = 0, hello = null, helloAt = 0, listeners = {}, lastAccounts = '', lastChain = '';
  function err(code, message) { var e = new Error(message); e.code = code; return e; }
  function emit(ev, arg) { (listeners[ev] || []).slice().forEach(function (f) { try { f(arg); } catch (e) { } }); }
  function probe() {
    var now = Date.now();
    if (hello && now - helloAt < 10000) return Promise.resolve(hello);
    return fetch(BASE + '/bridge/hello', { method: 'GET', cache: 'no-store' }).then(function (r) { return r.json(); }).then(function (j) {
      if (!j || !j.ok || j.wallet !== 'igneum') throw err(4900, 'The Igneum Wallet is not open on this computer');
      hello = j; helloAt = Date.now(); return j;
    }).catch(function (e) { hello = null; throw e.code ? e : err(4900, 'The Igneum Wallet is not open on this computer. Open it, then try again.'); });
  }
  function rpc(method, params) {
    var id = ++seq;
    return fetch(BASE + '/bridge/rpc', { method: 'POST', headers: { 'Content-Type': 'application/json', 'X-Igneum-Bridge': '1' }, body: JSON.stringify({ jsonrpc: '2.0', id: id, method: method, params: params || [] }), cache: 'no-store' })
      .then(function (r) { return r.json(); }, function () { throw err(4900, 'The Igneum Wallet stopped answering. Open it, then try again.'); });
  }
  function settle(j) {
    if (j && j.error) throw err(typeof j.error.code === 'number' ? j.error.code : -32603, j.error.message || 'the wallet refused');
    return j ? j.result : null;
  }
  function wait(id) {
    return new Promise(function (resolve, reject) {
      function again() {
        rpc('igneum_poll', [id]).then(function (j) {
          if (j && j.pending) { win.setTimeout(again, POLL_MS); return; }
          try { resolve(settle(j)); } catch (e) { reject(e); }
        }, reject);
      }
      win.setTimeout(again, POLL_MS);
    });
  }
  var provider = {
    isIgneum: true,
    isConnected: function () { return !!hello; },
    selectedAddress: null,
    chainId: null,
    request: function (args) {
      if (!args || typeof args.method !== 'string') return Promise.reject(err(-32602, 'request({method, params})'));
      var method = args.method, params = args.params || [];
      return probe().then(function () { return rpc(method, params); }).then(function (j) {
        if (j && j.pending) return wait(j.pending);
        return settle(j);
      }).then(function (result) {
        if (method === 'eth_requestAccounts' || method === 'eth_accounts') { provider.selectedAddress = Array.isArray(result) && result.length ? result[0] : null; }
        if (method === 'eth_chainId' && typeof result === 'string') provider.chainId = result;
        return result;
      });
    },
    on: function (ev, f) { (listeners[ev] = listeners[ev] || []).push(f); return provider; },
    removeListener: function (ev, f) { listeners[ev] = (listeners[ev] || []).filter(function (g) { return g !== f; }); return provider; },
    // the poll behind accountsChanged and chainChanged (tests call it directly)
    _tick: function () {
      return (hello ? Promise.resolve() : probe()).then(function () { return rpc('eth_accounts', []); }).then(function (j) {
        var acc = (j && !j.error && Array.isArray(j.result)) ? j.result : [];
        var key = acc.join(',');
        if (lastAccounts !== '' || key !== '') { if (key !== lastAccounts) { lastAccounts = key; provider.selectedAddress = acc[0] || null; emit('accountsChanged', acc); } } else lastAccounts = key;
        return rpc('eth_chainId', []);
      }).then(function (j) {
        var c = j && !j.error && typeof j.result === 'string' ? j.result : '';
        if (c && lastChain && c !== lastChain) emit('chainChanged', c);
        if (c) { lastChain = c; provider.chainId = c; }
      }).catch(function () { });
    },
    // legacy shapes some libraries still call
    enable: function () { return provider.request({ method: 'eth_requestAccounts' }); },
    send: function (method, params) { return provider.request(typeof method === 'string' ? { method: method, params: params } : method); },
    sendAsync: function (payload, cb) { provider.request(payload).then(function (r) { cb(null, { id: payload.id, jsonrpc: '2.0', result: r }); }, function (e) { cb(e); }); }
  };
  var ICON = 'data:image/svg+xml;utf8,' + encodeURIComponent('<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><rect width="100" height="100" rx="22" fill="#0C0C0E"/><path d="M50 10 L78 50 L50 90 L22 50 Z M50 36 L61 50 L50 64 L39 50 Z" fill="#F2541B" fill-rule="evenodd"/></svg>');
  var info = { uuid: 'c0b3a5a6-6b2e-4a0a-9d0e-igneumwallet1', name: 'Igneum Wallet', icon: ICON, rdns: 'network.igneum.wallet' };
  function announce() { try { win.dispatchEvent(new CustomEvent('eip6963:announceProvider', { detail: Object.freeze({ info: info, provider: provider }) })); } catch (e) { } }
  win.igneum = provider;
  if (!win.ethereum) win.ethereum = provider;
  announce();
  win.addEventListener('eip6963:requestProvider', announce);
  // the first probe tells the page whether the wallet is here; the tick keeps accountsChanged honest
  probe().then(function () { provider._tick(); }, function () { });
  win.setInterval(function () { if (hello) provider._tick(); else probe().catch(function () { }); }, TICK_MS);
})(typeof window !== 'undefined' ? window : this);