[wip] now display user's camera

next tricky thing is connecting users
have call box
2026-02-24 10:40:43 -08:00 · 2026-02-12 20:54:58 -08:00 · 2026-02-12 20:32:34 -08:00 · 2026-02-12 19:31:08 -08:00 · 2026-02-12 18:01:37 -08:00 · 2026-02-12 18:01:29 -08:00
30 changed files with 791 additions and 1545 deletions
@@ -1,9 +1,3 @@
-2026-02-25(PRH):
-    grids: instead of spying the chain for a tx, let's use dead drop
-
-    - so for "generate", need to form tx for the user to sign
-    - make dead drop -> have process that knows each tx and the dead drop location
-
 OPEN LOOPS - 2025-11-12
    - websockets
        - separate websocket handling from websocket parsing/sending
@@ -1,43 +1,9 @@
-fewd = front end web dev
-=====================================================================
+# fewd = front end web dev

 this is me (PRH) trying to learn some front end web dev because pixels are
 important despite my wishes.

-Building/Running
---------------------------------------------------------------------
+# notes

-### Prereqs
+## goal queue

-1. [Install Erlang and ZX](https://git.qpq.swiss/QPQ-AG/research-megadoc/wiki/Installing-Erlang-and-zx)
-2. **DEV ONLY**: `apt install node-typescript` (Devuan Excalibur)
-
-   This is needed if you want to **edit** the `.ts` files found in
-   `/priv/static/js/ts/*.ts`. The built JS files are under version control and can
-   be found in `/priv/static/js/dist/`
-
-### Building/Running HTTP Server
-
-If you are only changing the Erlang or simply just want to run the program
-without developing it, then just run
-
-```
-zxh runlocal
-```
-
-### Building TS->JS
-
-**This is only necessary if you edited the `.ts` files and want to transpile
-them over to JS.**
-
-This requires you installed `tsc` as above.
-
-```
-make tsc
-```
-
-If you're doing development you may want
-
-```
-make watch
-```
@@ -1,9 +0,0 @@
-/**
- * Title:           Title
- * Description:     Description
- * Author:          Peter Harpending <peterharpending@qpq.swiss>
- * Date:            YYYY-MM-DD
- * Last-Updated:    YYYY-MM-DD
- *
- * @module
- */
@@ -1,60 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-    <meta charset="utf-8">
-    <title>Basic GRIDS Demo</title>
-    <link rel="stylesheet" href="/css/default.css">
-</head>
-<body>
-    <div id="titlebar">
-        <div class="content">
-            <a href="/" class="tb-home">Home</a>
-        </div>
-    </div>
-
-    <div class="content">
-        <h1 class="content-title">FEWD: GRIDS DEMO</h1>
-
-
-        <h2>Making a Spend</h2>
-
-        <label for="grids-n">Network ID:</label>
-        <input type  = "text"
-               id    = "grids-n"
-               value = "groot.testnet"
-               disabled>
-        <br>
-
-        <label for="grids-r">Recipient:</label>
-        <input type  = "text"
-               id    = "grids-r"
-               value = "ak_n6aVQ6PkBdVdv7kRRcfnzDVmBsH6hqEwVWSB6UAEb3kkjrPMe"
-               disabled>
-        <br>
-
-        <label for="grids-a">Amount (P):</label>
-        <input type  = "number"
-               id    = "grids-a"
-               value = "69"
-               disabled>
-        <br>
-
-        <label for="grids-p">Payload:</label>
-        <input type  = "text"
-               id    = "grids-p"
-               disabled>
-        <br>
-
-        <input type  = "button"
-               id    = "grids-submit"
-               value = "Generate">
-        <br>
-
-        <textarea disabled id="grids-url" hidden></textarea>
-        <br>
-        <img id="grids-png" hidden>
-    </div>
-
-    <script src="/js/dist/grids-basic.js"></script>
-</body>
-</html>
@@ -17,7 +17,7 @@

        <ul>
            <li><a href="/echo.html">Echo</a></li>
-            <li><a href="/grids-basic.html">GRIDS: Basic Demo</a></li>
+            <li><a href="/webrtc.html">WebRTC</a></li>
            <li><a href="/wfc.html">WFC</a></li>
        </ul>
    </div>
@@ -1,29 +0,0 @@
-/**
- * Title:           GRIDS Basic Page Script
- * Description:     Page Script for /grids-basic.html
- * Author:          Peter Harpending <peterharpending@qpq.swiss>
- * Date:            2025-12-29
- * Last-Updated:    2025-12-29
- *
- * @module
- */
-/**
- * Runs on page load
- */
-declare function main(): Promise<void>;
-declare function on_submit(n_input: HTMLInputElement, r_input: HTMLInputElement, a_input: HTMLInputElement, p_input: HTMLInputElement, grids_url_elt: HTMLTextAreaElement, grids_png_elt: HTMLImageElement): Promise<void>;
-type Safe<t> = {
-    ok: true;
-    result: t;
-} | {
-    ok: false;
-    error: string;
-};
-type GridsResult = {
-    url: string;
-    png_base64: string;
-};
-/**
- * gets the grids url
- */
-declare function grids_request(net_id: string, recipient: string, amount: number, payload: string): Promise<Safe<GridsResult>>;
@@ -1,87 +0,0 @@
-"use strict";
-/**
- * Title:           GRIDS Basic Page Script
- * Description:     Page Script for /grids-basic.html
- * Author:          Peter Harpending <peterharpending@qpq.swiss>
- * Date:            2025-12-29
- * Last-Updated:    2025-12-29
- *
- * @module
- */
-main();
-/**
- * Runs on page load
- */
-async function main() {
-    let n_input = document.getElementById('grids-n');
-    let r_input = document.getElementById('grids-r');
-    let a_input = document.getElementById('grids-a');
-    let p_input = document.getElementById('grids-p');
-    let submit_btn = document.getElementById('grids-submit');
-    let grids_url_elt = document.getElementById('grids-url');
-    let grids_png_elt = document.getElementById('grids-png');
-    let rand_data = new Uint8Array(32);
-    window.crypto.getRandomValues(rand_data);
-    let hex = rand_data.toHex().toUpperCase();
-    p_input.value = 'text payload ' + hex;
-    // Page initialization
-    submit_btn.addEventListener('click', async function (e) {
-        await on_submit(n_input, r_input, a_input, p_input, grids_url_elt, grids_png_elt);
-    });
-    // enable buttons
-    submit_btn.disabled = false;
-}
-async function on_submit(n_input, r_input, a_input, p_input, grids_url_elt, grids_png_elt) {
-    // pull out values
-    let network_id = n_input.value;
-    let recipient = r_input.value;
-    let amount = parseInt(a_input.value);
-    let payload = p_input.value;
-    let result = await grids_request(network_id, recipient, amount, payload);
-    // show url field and png
-    if (result.ok) {
-        let url = result.result.url;
-        let png_base64 = result.result.png_base64;
-        let src_prefix = 'data:image/png;base64,';
-        let src = src_prefix + png_base64;
-        grids_url_elt.innerText = url;
-        grids_png_elt.src = src;
-        grids_url_elt.hidden = false;
-        grids_png_elt.hidden = false;
-    }
-    else {
-        alert('ERROR: ' + result.error);
-    }
-}
-/**
- * gets the grids url
- */
-async function grids_request(net_id, recipient, amount, payload) {
-    // format for network transmission
-    let obj = { 'network_id': net_id,
-        'recipient': recipient,
-        'amount': amount,
-        'payload': payload };
-    let obj_text = JSON.stringify(obj, undefined, 4);
-    let url = '/grids-mkdd';
-    let req_options = { method: 'POST',
-        headers: { 'content-type': 'application/json' },
-        body: obj_text };
-    let result = { ok: false,
-        error: 'IT DO BE LIKE THAT MISTA STANCIL' };
-    try {
-        let response = await fetch(url, req_options);
-        if (response.ok)
-            result = await response.json();
-        else {
-            console.log('bad http response:', response);
-            result = { ok: false, error: 'BAD HTTP RESPONSE' };
-        }
-    }
-    catch (x) {
-        console.log('network error:', x);
-        result = { ok: false, error: 'NETWORK ERROR' };
-    }
-    return result;
-}
-//# sourceMappingURL=grids-basic.js.map
@@ -1 +0,0 @@
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@@ -1 +1 @@
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+{"version":3,"file":"libfewd.js","sourceRoot":"","sources":["../ts/libfewd.ts"],"names":[],"mappings":"AAAA;;;;GAIG;AAEH,OAAO,EACH,WAAW,EACX,qBAAqB,EACxB,CAAC;AAGF,SACA,WAAW,CACN,gBAAmC,EACnC,cAAsC,EACtC,UAAyB;IAG1B,+DAA+D;IAC/D,IAAI,gBAAgB,CAAC,OAAO,EAAE;QAC1B,IAAI,aAAa,GAAW,cAAc,CAAC,YAAY,CAAC;QACxD,sCAAsC;QACtC,IAAI,aAAa,GAAG,UAAU;YAC1B,cAAc,CAAC,KAAK,CAAC,MAAM,GAAG,MAAM,CAAC,aAAa,CAAC,GAAG,IAAI,CAAC;;YAE3D,cAAc,CAAC,KAAK,CAAC,MAAM,GAAG,MAAM,CAAC,UAAU,CAAC,GAAG,IAAI,CAAC;KAC/D;AACL,CAAC;AAGD,SACA,qBAAqB,CAChB,gBAAmC,EACnC,cAAsC;IAGvC,IAAI,gBAAgB,CAAC,OAAO,EAAE;QAC1B,mBAAmB;QACnB,cAAc,CAAC,SAAS,GAAG,cAAc,CAAC,YAAY,CAAC;KAC1D;AACL,CAAC"}
@@ -0,0 +1,22 @@
+/**
+ * webrtc page script
+ *
+ * Author: Peter Harpending <peterharpending@qpq.swiss>
+ * Date: 2026-02-04
+ * Copyright: Copyright (c) 2026 QPQ AG
+ *
+ * Reference: https://git.qpq.swiss/QPQ-AG/research-megadoc/src/commit/c7c4592d4b21ad120145ef63334471a1a7ec1e60/paste/2026-02/grok-webrtc.html
+ *
+ * @module
+ */
+declare function main(): Promise<void>;
+/**
+ * Try to get the user's camera
+ *
+ * tries to get screenshare if user camera not available for whatever reason
+ *
+ * chimps out if
+ * - not on https
+ * - user says no
+ */
+declare function getUserCamera(): Promise<MediaStream>;
@@ -0,0 +1,41 @@
+"use strict";
+/**
+ * webrtc page script
+ *
+ * Author: Peter Harpending <peterharpending@qpq.swiss>
+ * Date: 2026-02-04
+ * Copyright: Copyright (c) 2026 QPQ AG
+ *
+ * Reference: https://git.qpq.swiss/QPQ-AG/research-megadoc/src/commit/c7c4592d4b21ad120145ef63334471a1a7ec1e60/paste/2026-02/grok-webrtc.html
+ *
+ * @module
+ */
+main();
+async function main() {
+    console.log('peepy');
+    let video = await getUserCamera();
+    console.log('poopy');
+    console.log('poopu');
+    let moi = document.getElementById('me');
+    moi.srcObject = video;
+    console.log('poopa');
+}
+/**
+ * Try to get the user's camera
+ *
+ * tries to get screenshare if user camera not available for whatever reason
+ *
+ * chimps out if
+ * - not on https
+ * - user says no
+ */
+async function getUserCamera() {
+    if (!(navigator.mediaDevices)) {
+        console.error('navigator.mediaDevices is null; user not on https or something');
+    }
+    let availableDevices = await navigator.mediaDevices.enumerateDevices();
+    console.log(availableDevices);
+    return await navigator.mediaDevices.getUserMedia({ video: true, audio: false });
+    // return await navigator.mediaDevices.getDisplayMedia();
+}
+//# sourceMappingURL=webrtc.js.map
@@ -0,0 +1 @@
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@@ -1 +1 @@
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@@ -1,136 +0,0 @@
-/**
- * Title:           GRIDS Basic Page Script
- * Description:     Page Script for /grids-basic.html
- * Author:          Peter Harpending <peterharpending@qpq.swiss>
- * Date:            2025-12-29
- * Last-Updated:    2025-12-29
- *
- * @module
- */
-
-main();
-
-
-/**
- * Runs on page load
- */
-async function
-main
-    ()
-{
-    let n_input    = document.getElementById('grids-n')      as HTMLInputElement;
-    let r_input    = document.getElementById('grids-r')      as HTMLInputElement;
-    let a_input    = document.getElementById('grids-a')      as HTMLInputElement;
-    let p_input    = document.getElementById('grids-p')      as HTMLInputElement;
-    let submit_btn = document.getElementById('grids-submit') as HTMLInputElement;
-
-    let grids_url_elt = document.getElementById('grids-url') as HTMLTextAreaElement;
-    let grids_png_elt = document.getElementById('grids-png') as HTMLImageElement;
-
-    let rand_data : Uint8Array = new Uint8Array(32);
-    window.crypto.getRandomValues(rand_data);
-    let hex : string = rand_data.toHex().toUpperCase();
-    p_input.value = 'text payload ' + hex;
-
-    // Page initialization
-    submit_btn.addEventListener(
-        'click',
-        async function(e) {
-            await on_submit(n_input, r_input, a_input, p_input, grids_url_elt, grids_png_elt)
-        }
-    );
-
-    // enable buttons
-    submit_btn.disabled = false;
-}
-
-async function
-on_submit
-    (n_input       : HTMLInputElement,
-     r_input       : HTMLInputElement,
-     a_input       : HTMLInputElement,
-     p_input       : HTMLInputElement,
-     grids_url_elt : HTMLTextAreaElement,
-     grids_png_elt : HTMLImageElement)
-    : Promise<void>
-{
-    // pull out values
-    let network_id : string = n_input.value;
-    let recipient  : string = r_input.value;
-    let amount     : number = parseInt(a_input.value);
-    let payload    : string = p_input.value;
-
-    let result: Safe<GridsResult> = await grids_request(network_id, recipient, amount, payload);
-
-    // show url field and png
-    if (result.ok) {
-        let url        : string = result.result.url;
-        let png_base64 : string = result.result.png_base64;
-
-        let src_prefix : string = 'data:image/png;base64,'
-
-        let src = src_prefix + png_base64;
-
-        grids_url_elt.innerText = url;
-        grids_png_elt.src       = src;
-
-        grids_url_elt.hidden = false;
-        grids_png_elt.hidden = false;
-    }
-    else {
-        alert('ERROR: ' + result.error);
-    }
-}
-
-
-type Safe<t> = {ok: true,  result: t}
-             | {ok: false, error: string};
-
-type GridsResult = {url       : string,
-                    png_base64: string};
-
-/**
- * gets the grids url
- */
-async function
-grids_request
-    (net_id    : string,
-     recipient : string,
-     amount    : number,
-     payload   : string)
-    : Promise<Safe<GridsResult>>
-{
-    // format for network transmission
-    let obj      : object = {'network_id' : net_id,
-                             'recipient'  : recipient,
-                             'amount'     : amount,
-                             'payload'    : payload};
-    let obj_text : string = JSON.stringify(obj, undefined, 4);
-
-
-    let url = '/grids-mkdd';
-    let req_options  = {method:  'POST',
-                        headers: {'content-type': 'application/json'},
-                        body:    obj_text};
-
-
-    let result: Safe<GridsResult> =
-            {ok    : false,
-             error : 'IT DO BE LIKE THAT MISTA STANCIL'};
-
-    try {
-        let response : Response = await fetch(url, req_options);
-        if (response.ok)
-            result = await response.json() as Safe<GridsResult>;
-        else {
-            console.log('bad http response:', response);
-            result = {ok: false, error: 'BAD HTTP RESPONSE'};
-        }
-    }
-    catch (x: any) {
-        console.log('network error:', x);
-        result = {ok: false, error: 'NETWORK ERROR'};
-    }
-
-    return result;
-}
@@ -0,0 +1,54 @@
+/**
+ * webrtc page script
+ *
+ * Author: Peter Harpending <peterharpending@qpq.swiss>
+ * Date: 2026-02-04
+ * Copyright: Copyright (c) 2026 QPQ AG
+ *
+ * Reference: https://git.qpq.swiss/QPQ-AG/research-megadoc/src/commit/c7c4592d4b21ad120145ef63334471a1a7ec1e60/paste/2026-02/grok-webrtc.html
+ *
+ * @module
+ */
+
+main();
+
+async function
+main
+    ()
+    : Promise<void>
+{
+    console.log('peepy');
+    let video : MediaStream      = await getUserCamera();
+    console.log('poopy');
+    console.log('poopu');
+    let moi = document.getElementById('me') as HTMLVideoElement;
+    moi.srcObject = video;
+    console.log('poopa');
+}
+
+
+/**
+ * Try to get the user's camera
+ *
+ * tries to get screenshare if user camera not available for whatever reason
+ *
+ * chimps out if
+ * - not on https
+ * - user says no
+ */
+async function
+getUserCamera
+    ()
+    : Promise<MediaStream>
+{
+    if (!(navigator.mediaDevices)) {
+        console.error('navigator.mediaDevices is null; user not on https or something');
+    }
+
+    let availableDevices: Array<MediaDeviceInfo> =
+        await navigator.mediaDevices.enumerateDevices();
+    console.log(availableDevices);
+
+    return await navigator.mediaDevices.getUserMedia({video: true, audio: false});
+    // return await navigator.mediaDevices.getDisplayMedia();
+}
@@ -2,7 +2,7 @@
 <html lang="en">
 <head>
    <meta charset="utf-8">
-    <title>FIXME</title>
+    <title>FEWD: voice chat demo</title>
    <link rel="stylesheet" href="/css/default.css">
 </head>
 <body>
@@ -13,8 +13,15 @@
    </div>

    <div class="content">
-        <h1 class="content-title">FEWD: FIXME</h1>
+        <h1 class="content-title">FEWD: webrtc demo</h1>

+        <div class="content-body">
+            <textarea disabled id="wfc-output"></textarea>
+
+            <video id="me" autoplay muted></video>
+        </div>
    </div>
+
+    <script src="/js/dist/webrtc.js"></script>
 </body>
 </html>
@@ -0,0 +1,166 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8" />
+  <title>Super Simple WebRTC – Manual Signaling</title>
+  <style>
+    body { font-family: sans-serif; margin: 20px; }
+    textarea { width: 100%; height: 90px; font-family: monospace; }
+    button { margin: 6px 0; padding: 8px 16px; }
+    video { max-width: 320px; border: 1px solid #444; margin: 8px; background: #000; }
+  </style>
+</head>
+<body>
+
+<h2>WebRTC 1:1 test (copy-paste signaling)</h2>
+
+<div>
+  <button id="btnCreateOffer">1. Create Offer (Peer A)</button>
+  <button id="btnSetRemoteOffer">2. Paste offer → Set remote description</button><br>
+  <textarea id="offerSdp" placeholder="Offer SDP will appear here (Peer A) or paste offer here (Peer B)"></textarea>
+</div>
+
+<div style="margin-top: 24px;">
+  <button id="btnCreateAnswer">3. Create Answer (Peer B)</button>
+  <button id="btnSetRemoteAnswer">4. Paste answer → Set remote description</button><br>
+  <textarea id="answerSdp" placeholder="Answer SDP will appear here (Peer B) or paste answer here (Peer A)"></textarea>
+</div>
+
+<div style="margin-top: 20px;">
+  <button id="btnAddIce">Add ICE candidate manually (if needed)</button><br>
+  <textarea id="iceInput" placeholder="Paste remote ICE candidate here"></textarea>
+  <div id="iceLog"></div>
+</div>
+
+<div style="margin-top: 20px;">
+  <video id="localVideo" autoplay playsinline muted></video>
+  <video id="remoteVideo" autoplay playsinline></video>
+</div>
+
+<pre id="status">Status: ready</pre>
+
+<script>
+// ────────────────────────────────────────────────
+const $ = s => document.querySelector(s);
+const status = $('pre#status');
+const offerArea  = $('#offerSdp');
+const answerArea = $('#answerSdp');
+const iceInput   = $('#iceInput');
+const iceLog     = $('#iceLog');
+
+let pc = null;
+let localStream = null;
+
+// ────────────────────────────────────────────────
+async function initPeerConnection() {
+  if (pc) pc.close();
+
+  pc = new RTCPeerConnection({
+    iceServers: [
+      { urls: "stun:stun.l.google.com:19302" },
+      { urls: "stun:stun.stunprotocol.org" }
+    ]
+  });
+
+  pc.onicecandidate = e => {
+    if (e.candidate) {
+      console.log("New ICE candidate:", e.candidate);
+      iceLog.innerHTML += "<div style='color:#c33'>→ " + e.candidate.candidate + "</div>";
+    }
+  };
+
+  pc.oniceconnectionstatechange = () => {
+    status.textContent = "ICE state: " + pc.iceConnectionState;
+  };
+
+  pc.ontrack = e => {
+    console.log("ontrack", e);
+    const remoteVideo = $('#remoteVideo');
+    remoteVideo.srcObject = e.streams[0];
+    status.textContent = "ICE state: " + pc.iceConnectionState + " (receiving media!)";
+  };
+
+  // Add local stream if we have camera/mic
+  if (localStream) {
+    localStream.getTracks().forEach(track => {
+      pc.addTrack(track, localStream);
+    });
+  }
+}
+
+// ────────────────────────────────────────────────
+async function startLocalCamera() {
+  try {
+    localStream = await navigator.mediaDevices.getUserMedia({
+      video: true,
+      audio: false    // change to true if you want audio too
+    });
+    $('#localVideo').srcObject = localStream;
+  } catch (err) {
+    console.error("Camera access failed", err);
+    status.textContent = "Camera access failed: " + err.message;
+  }
+}
+
+// ────────────────────────────────────────────────
+$('#btnCreateOffer').onclick = async () => {
+  await initPeerConnection();
+  await startLocalCamera();
+
+  const offer = await pc.createOffer();
+  await pc.setLocalDescription(offer);
+
+  offerArea.value = JSON.stringify(pc.localDescription, null, 2);
+  status.textContent = "Offer created – copy and send to peer B";
+};
+
+// ────────────────────────────────────────────────
+$('#btnCreateAnswer').onclick = async () => {
+  await initPeerConnection();
+  await startLocalCamera();
+
+  const offer = JSON.parse(offerArea.value);
+  await pc.setRemoteDescription(offer);
+
+  const answer = await pc.createAnswer();
+  await pc.setLocalDescription(answer);
+
+  answerArea.value = JSON.stringify(pc.localDescription, null, 2);
+  status.textContent = "Answer created – copy and send to peer A";
+};
+
+// ────────────────────────────────────────────────
+$('#btnSetRemoteOffer').onclick = async () => {
+  if (!pc) await initPeerConnection();
+
+  const remote = JSON.parse(offerArea.value);
+  await pc.setRemoteDescription(remote);
+  status.textContent = "Remote offer set";
+};
+
+// ────────────────────────────────────────────────
+$('#btnSetRemoteAnswer').onclick = async () => {
+  const remote = JSON.parse(answerArea.value);
+  await pc.setRemoteDescription(remote);
+  status.textContent = "Remote answer set – waiting for ICE/media";
+};
+
+// ────────────────────────────────────────────────
+$('#btnAddIce').onclick = async () => {
+  if (!iceInput.value.trim()) return;
+  try {
+    const candidate = new RTCIceCandidate(JSON.parse(iceInput.value));
+    await pc.addIceCandidate(candidate);
+    iceLog.innerHTML += "<div style='color:#3a3'>← added ICE candidate</div>";
+    iceInput.value = "";
+  } catch (err) {
+    console.error("Bad ICE candidate", err);
+  }
+};
+
+// Optional: auto-start camera when page loads
+// startLocalCamera();
+
+</script>
+</body>
+</html>
@@ -0,0 +1,127 @@
+/**
+ * webrtc page script
+ *
+ * Author: Peter Harpending <peterharpending@qpq.swiss>
+ * Date: 2026-02-04
+ * Copyright: Copyright (c) 2026 QPQ AG
+ *
+ * Reference: https://git.qpq.swiss/QPQ-AG/research-megadoc/src/commit/c7c4592d4b21ad120145ef63334471a1a7ec1e60/paste/2026-02/grok-webrtc.html
+ *
+ * @module
+ */
+
+type state =
+    {whoami: string,
+     roster: Array<string>};
+
+let st: state =
+    {whoami: "",
+     roster: []};
+
+main();
+
+async function
+main
+    ()
+    : Promise<void>
+{
+    // start websocket immediately
+    let ws: WebSocket;
+    let init = document.getElementById('init') as HTMLDivElement;
+    let init_join = document.getElementById('init-join') as HTMLButtonElement;
+
+    // handle button click
+    init_join.addEventListener('click',
+        function() {
+            init.hidden = true;
+            document.getElementById('run')!.hidden = false;
+            ws = new WebSocket('/ws/webrtc');
+            ws.onopen    = function(e) { console.log('ws open'); };
+            ws.onclose   = function(e) { console.warn('ws closed'); };
+            ws.onerror   = function(e) { console.error('ws error:', e); };
+            ws.onmessage =
+                function(e) {
+                    // console.log('ws message:', e.data);
+                    let message = JSON.parse(e.data) as ws_msg;
+                    handle_ws_msg(message);
+                };
+        }
+    );
+}
+
+type ws_msg = ["whoami", string]
+            | ["roster", Array<string>];
+
+function
+handle_ws_msg
+    (message: ws_msg)
+    : void
+{
+    console.log('message from server:', message);
+    switch(message[0]) {
+        case "whoami":
+            st.whoami = message[1];
+            break;
+        case "roster":
+            st.roster = (message[1] as Array<string>);
+            break;
+        default:
+            console.warn("unknown message", message);
+    }
+
+    render_state();
+}
+
+
+
+function
+ws_send_json
+    (ws : WebSocket,
+     x  : any)
+    : void
+{
+    let s: string = JSON.stringify(x, undefined, 4);
+    console.log('sending:\n', s);
+
+    ws.send(s);
+}
+
+
+
+function
+render_state
+    ()
+    : void
+{
+    console.log('st', st);
+    // whoami
+    document.getElementById('whoami')!.innerText = st.whoami;
+    //
+    let roster_ul = document.getElementById('roster-ul') as HTMLUListElement;
+    let newChildren : Array<HTMLElement> = [];
+    for (let nick of st.roster) {
+        if (!(nick === st.whoami)) {
+            let li = nickkk(nick);
+            newChildren.push(li);
+        }
+    }
+    roster_ul.replaceChildren(...newChildren);
+}
+
+function
+nickkk
+    (nick: string)
+    : HTMLElement
+{
+    let li = document.createElement('li');
+
+    li.innerText += nick;
+    li.innerText += ' ';
+
+    let call_a = document.createElement('button');
+    call_a.innerText = 'call';
+
+    li.appendChild(call_a);
+
+    return li;
+}
@@ -1,150 +0,0 @@
-% @doc grids cache
-module(fd_gridsd).
-vsn("0.2.0").
-
-behavior(gen_server).
-
-export_type([
-]).
-
-export([
-    %% caller context
-    mkdd/4,
-
-    %% api
-    start_link/0,
-
-    %% process context
-    init/1, handle_call/3, handle_cast/2, handle_info/2,
-    code_change/3, terminate/2
-]).
-
-include("$zx_include/zx_logger.hrl").
-
-type hex() :: binary().
-define(SEC, 1).
-define(MIN, 60*SEC).
-define(DEAD_DROP_TTL, 30*MIN).
-
-record(dd,
-        {created_at :: integer(),
-         payload    :: string()}).
-type dd()  :: #dd{}.
-
-record(s,
-        {drops = #{} :: #{hex() := dd()}}).
-
-type state() :: #s{}.
-
-
-%%-----------------------------------------------------------------------------
-%% caller context
-%%-----------------------------------------------------------------------------
-
-spec mkdd(NetworkId, Recipient, Amount, Payload) -> Result
-    when NetworkId :: string(),
-         Recipient :: string(),
-         Amount    :: non_neg_integer(),
-         Payload   :: binary(),
-         Result    :: {ok, URL, QR_PNG}
-                    | {error, string()},
-         URL       :: string(),
-         QR_PNG    :: binary().
-% @doc
-% make a dead drop
-
-mkdd(NetworkId, Recipient, Amount, Payload) ->
-    gen_server:call(?MODULE, {mkdd, NetworkId, Recipient, Amount, Payload}).
-
-
-%% gen_server callbacks
-start_link() ->
-    gen_server:start_link({local, ?MODULE}, ?MODULE, none, []).
-
-
-%%-----------------------------------------------------------------------------
-%% process context below this line
-%%-----------------------------------------------------------------------------
-
-%% gen_server callbacks
-
-init(none) ->
-    tell("starting fd_gridsd"),
-    InitState = #s{},
-    {ok, InitState}.
-
-
-handle_call({mkdd, NetworkId, Recipient, Amount, Payload}, From, State) ->
-    case do_mkdd(NetworkId, Recipient, Amount, Payload, State) of
-        {ok, URL, PNG, NewState} -> {reply, {ok, URL, PNG}, NewState};
-        Error                    -> {reply, Error, State}
-    end;
-handle_call(Unexpected, From, State) ->
-    tell("~tp: unexpected call from ~tp: ~tp", [?MODULE, Unexpected, From]),
-    {noreply, State}.
-
-
-handle_cast(Unexpected, State) ->
-    tell("~tp: unexpected cast: ~tp", [?MODULE, Unexpected]),
-    {noreply, State}.
-
-
-handle_info(Unexpected, State) ->
-    tell("~tp: unexpected info: ~tp", [?MODULE, Unexpected]),
-    {noreply, State}.
-
-
-code_change(_, State, _) ->
-    {ok, State}.
-
-terminate(_, _) ->
-    ok.
-
-
-%%-----------------------------------------------------------------------------
-%% internals
-%%-----------------------------------------------------------------------------
-
-spec do_mkdd(NetworkId, Recipient, Amount, Payload, State) -> Result
-    when NetworkId :: string(),
-         Recipient :: string(),
-         Amount    :: pos_integer(),
-         Payload   :: binary(),
-         State     :: state(),
-         Result    :: {ok, URL, QR_PNG, NewState}
-                    | {error, Reason},
-         URL      :: string(),
-         QR_PNG   :: binary(),
-         NewState :: state(),
-         Reason   :: any().
-
-do_mkdd(NetId, Recipient, Amount, Payload, State = #s{drops = Drops}) ->
-    HexStr    = rand_hex(),
-    CreatedAt = now_sec(),
-    TxStr     = form_txstr(NetId, Recipient, Amount, Payload),
-    DD        = #dd{created_at = CreatedAt, payload = TxStr},
-    URL       = dd_url(HexStr),
-    PNG       = qr:encode_png(unicode:characters_to_binary(URL)),
-    NewDrops  = maps:put(HexStr, DD, Drops),
-    NewState  = State#s{drops = NewDrops},
-    {ok, URL, PNG, NewState}.
-
-now_sec() ->
-    calendar:datetime_to_gregorian_seconds(calendar:universal_time()).
-
-
-spec rand_hex() -> hex().
-rand_hex() ->
-    unicode:characters_to_binary(hexify(rand:bytes(10))).
-
-hexify(<<B:8, Rest/binary>>) when B < 16#10 -> ["0", integer_to_list(B, 16), hexify(Rest)];
-hexify(<<B:8, Rest/binary>>)                -> [integer_to_list(B, 16), hexify(Rest)];
-hexify(<<>>)                                -> [].
-
-dd_url(HexStr) ->
-    unicode:characters_to_list(["grids://", fewd:host(), "/1/d/", HexStr]).
-
-
-% ref
-form_txstr(_NetId, _Recipient, _Amount, _Payload) ->
-    "foobar".
@@ -23,6 +23,12 @@ start_link() ->

 init([]) ->
    RestartStrategy = {one_for_one, 1, 60},
+    WebRTC    = {fd_httpd_webrtc,
+                 {fd_httpd_webrtc, start_link, []},
+                 permanent,
+                 5000,
+                 worker,
+                 [fd_httpd_webrtc]},
    FileCache = {fd_httpd_sfc,
                 {fd_httpd_sfc, start_link, []},
                 permanent,
@@ -35,5 +41,6 @@ init([]) ->
                 5000,
                 supervisor,
                 [fd_httpd_clients]},
-    Children  = [FileCache, Clients],
+    Children  = [WebRTC, FileCache, Clients],
+    %Children  = [FileCache, Clients],
    {ok, {RestartStrategy, Children}}.
@@ -135,9 +135,19 @@ loop(Parent, Debug, State = #s{socket = Socket, next = Next0}) ->
            Received = <<Next0/binary, Message/binary>>,
            case qhl:parse(Socket, Received) of
                {ok, Req, Next1} ->
-                    Next2 = handle_request(Socket, Req, Next1),
+                    %% FIXME: unfuck received logic here
+                    %% handle_request should eventually call back into
+                    %% loop/3 or close the socket
+                    %%
+                    %% also loop/3 should be loop/1, because we need to pass
+                    %% the state down the callchains
+                    Next2 =
+                        case Next1 of
+                            none -> <<>>;
+                            Bin  -> Bin
+                        end,
                    NewState = State#s{next = Next2},
-                    loop(Parent, Debug, NewState);
+                    handle_request(Req, Parent, Debug, NewState);
                Error ->
                    %% should trigger bad request
                    tell(error, "~p QHL parse error: ~tp", [?LINE, Error]),
@@ -210,41 +220,44 @@ system_replace_state(StateFun, State) ->

 %%% http request handling

-spec handle_request(Sock, Request, Received) -> NewReceived
-    when Sock        :: gen_tcp:socket(),
-         Request     :: request(),
-         Received    :: binary(),
-         NewReceived :: binary().
+-spec handle_request(Request, Parent, Debug, State) -> no_return()
+    when Request :: request(),
+         Parent  :: pid(),
+         Debug   :: [sys:dbg_opt()],
+         State   :: state().

-handle_request(Sock, R = #request{method = M, path = P}, Received) when M =/= undefined, P =/= undefined ->
-    tell("~tp ~tp ~ts", [self(), M, P]),
-    route(Sock, M, P, R, Received).
+handle_request(Req = #request{method = Method, path = Path}, Parent, Debug, State)
+        when Method =/= undefined,
+             Path   =/= undefined ->
+    tell("~tp ~tp ~ts", [self(), Method, Path]),
+    route(Method, Path, Req, Parent, Debug, State).


-
-spec route(Sock, Method, Route, Request, Received) -> NewReceived
-    when Sock        :: gen_tcp:socket(),
-         Method      :: get | post,
-         Route       :: binary(),
-         Request     :: request(),
-         Received    :: binary(),
-         NewReceived :: binary().
-
-route(Sock, get, Route, Request, Received) ->
+% hardcode routes first
+route(get, Route, Request, P, D, S = #s{socket = Sock}) ->
    case Route of
-         <<"/ws/echo">>   -> ws_echo(Sock, Request)                 , Received;
-         <<"/">>          -> route_static(Sock, <<"/index.html">>)  , Received;
-         _                -> route_static(Sock, Route)              , Received
+         <<"/ws/echo">>   -> ws_echo(Sock, Request);
+         <<"/ws/webrtc">> ->
+            ws_webrtc(Request, S);
+         <<"/">> ->
+            route_static(Sock, <<"/index.html">>),
+            loop(P, D, S);
+         _ ->
+            route_static(Sock, Route),
+            loop(P, D, S)
    end;
-route(Sock, post, Route, Request, Received) ->
+route(post, Route, Request, P, D, S = #s{socket = Sock}) ->
    case Route of
-         <<"/grids-mkdd">> -> grids_mkdd(Sock, Request) , Received;
-         <<"/wfcin">>      -> wfcin(Sock, Request) , Received;
-         _                 -> fd_httpd_utils:http_err(Sock, 404)  , Received
+         <<"/wfcin">> ->
+            wfcin(Sock, Request),
+            loop(P, D, S);
+         _ ->
+            fd_httpd_utils:http_err(Sock, 404),
+            loop(P, D, S)
    end;
-route(Sock, _, _, _, Received) ->
+route(_, _, _, P, D, S = #s{socket = Sock}) ->
    fd_httpd_utils:http_err(Sock, 404),
-    Received.
+    loop(P, D, S).



@@ -280,6 +293,69 @@ respond_static(Sock, not_found) ->
    fd_httpd_utils:http_err(Sock, 404).


+%% ------------------------------
+%% webrtc
+%% ------------------------------
+
+ws_webrtc(Request, State = #s{socket = Sock}) ->
+    try
+        case qhl_ws:handshake(Request) of
+            {ok, Response} ->
+                fd_httpd_utils:respond(Sock, Response),
+                % wait for username
+                ok = fd_httpd_webrtc:join(),
+                ws_webrtc_loop(State);
+            Error ->
+                tell("ws_webrtc: error: ~tp", [Error]),
+                fd_httpd_utils:http_err(Sock, 400),
+                exit(bad_request)
+        end
+    catch
+        exit:Y:Z ->
+            tell("~tp ws_webrtc: dying peacefully: ~tp:~tp", [self(), Y, Z]),
+            gen_tcp:close(Sock);
+        error:Y:Z ->
+            tell(error, "~tp ws_webrtc: ERROR ~tp:~tp", [self(), Y, Z]),
+            fd_httpd_utils:http_err(Sock, 500),
+            error(internal_server_error)
+    end.
+
+
+-spec ws_webrtc_loop(state()) -> no_return().
+
+% we have no tcp bytes waiting to be parsed
+ws_webrtc_loop(State = #s{socket = Socket, next = <<>>}) ->
+    ok = inet:setopts(Socket, [{active, once}]),
+    receive
+        {tcp, Socket, Message} ->
+            NewState = State#s{next = Message},
+            ws_webrtc_loop(NewState);
+        {webrtc, Message} ->
+            ok = ws_webrtc_relay(Socket, s2c, Message),
+            ws_webrtc_loop(State);
+        {tcp_closed, Socket} ->
+            ok = tell("~p Socket closed, retiring.~n", [self()]),
+            exit(normal)
+    end;
+% we have TCP bytes sitting and waiting to be parsed
+ws_webrtc_loop(State = #s{socket = Sock, next = Recv}) ->
+    {ok, Message, NewRecv} = qhl_ws:recv_json(Sock, Recv, 5000),
+    ok = ws_webrtc_relay(Sock, c2s, Message),
+    ws_webrtc_loop(State#s{next = NewRecv}).
+
+
+% relay
+% message is a zj:value()
+ws_webrtc_relay(Socket, Direction, ZJValue) ->
+    tell("~p ws_webrtc_relay ~p: ~p", [self(), Direction, ZJValue]),
+    case Direction of
+        c2s -> fd_httpd_webrtc:hi(ZJValue);
+        s2c -> qhl_ws:send_json(Socket, ZJValue)
+    end,
+    ok.
+
+
+
 %% ------------------------------
 %% echo
 %% ------------------------------
@@ -320,36 +396,6 @@ ws_echo_loop(Sock, Frames, Received) ->
            error(Error)
    end.

-%% ------------------------------
-%% grids
-%% ------------------------------
-
-grids_mkdd(Sock, #request{enctype = json,
-                          body = B = #{"network_id" := NetId,
-                                       "recipient"  := Recipient,
-                                       "amount"     := Amount,
-                                       "payload"    := Payload}}) ->
-    tell("grids_mkdd good request: ~tp", [B]),
-    RespObj =
-        case fd_gridsd:mkdd(NetId, Recipient, Amount, unicode:characters_to_binary(Payload)) of
-            {ok, URL, PNG} ->
-                #{"ok"         => true,
-                  "result"     => #{"url"        => URL,
-                                    "png_base64" => unicode:characters_to_list(base64:encode(PNG))}};
-            {error, String} ->
-                #{"ok"    => false,
-                  "error" => String}
-        end,
-    Body = zj:encode(RespObj),
-    % update cache with new context
-    Response = #response{headers = [{"content-type", "application/json"}],
-                         body    = Body},
-    fd_httpd_utils:respond(Sock, Response);
-grids_mkdd(Sock, Request) ->
-    tell("grids_mkdd: bad request: ~tp", [Request]),
-    fd_httpd_utils:http_err(Sock, 400).
-
-

 %% ------------------------------
 %% wfc
@@ -0,0 +1,165 @@
+% @doc webrtc peer pool
+-module(fd_httpd_webrtc).
+
+-behavior(gen_server).
+
+%% api (caller context)
+-export([
+    join/0, hi/1
+]).
+
+% startup/gen_server callbacks
+-export([
+    % caller context
+    start_link/0,
+    % process context
+    init/1, handle_call/3, handle_cast/2, handle_info/2,
+    code_change/3, terminate/2
+]).
+
+-include("$zx_include/zx_logger.hrl").
+
+
+-record(u, {pid :: pid()}).
+-type user() :: #u{}.
+
+-record(s, {roster = [] :: [user()]}).
+-type state() :: #s{}.
+
+
+%%-----------------------------------------------------------------------------
+%% caller context
+%%-----------------------------------------------------------------------------
+
+
+start_link() ->
+    gen_server:start_link({local, ?MODULE}, ?MODULE, none, []).
+
+
+
+-spec join() -> ok | {error, any()}.
+
+join() ->
+    gen_server:call(?MODULE, join).
+
+
+
+-spec hi(Message) -> ok
+    when Message :: zj:value().
+
+hi(Message) ->
+    gen_server:cast(?MODULE, {hi, self(), Message}).
+
+
+
+%%-----------------------------------------------------------------------------
+%% process context
+%%-----------------------------------------------------------------------------
+
+%% gen_server callbacks
+
+init(none) ->
+    tell("starting fd_httpd_webrtc", []),
+    InitState = #s{},
+    {ok, InitState}.
+
+
+handle_call(join, _From = {PID, _Tag}, State) ->
+    {Reply, NewState} = do_join(PID, State),
+    {reply, Reply, NewState};
+handle_call(Unexpected, From, State) ->
+    tell("~tp: unexpected call from ~tp: ~tp", [?MODULE, Unexpected, From]),
+    {noreply, State}.
+
+
+handle_cast(Unexpected, State) ->
+    tell("~tp: unexpected cast: ~tp", [?MODULE, Unexpected]),
+    {noreply, State}.
+
+
+handle_info({'DOWN', _Ref, process, PID, _Reason}, State) ->
+    NewState = do_down(PID, State),
+    {noreply, NewState};
+handle_info(Unexpected, State) ->
+    tell("~tp: unexpected info: ~tp", [?MODULE, Unexpected]),
+    {noreply, State}.
+
+
+code_change(_, State, _) ->
+    {ok, State}.
+
+terminate(_, _) ->
+    ok.
+
+
+%%---------------------
+%% doers
+%%---------------------
+
+-spec do_join(PID, State) -> {Reply, NewState}
+    when PID      :: pid(),
+         State    :: state(),
+         Reply    :: ok
+                   | {error, any()},
+         NewState :: state().
+% @private join a user to a pool
+
+do_join(PID, State = #s{roster = Users}) ->
+    % see if pid is already there
+    case lists:keymember(PID, #u.pid, Users) of
+        true -> {error, already_joined};
+        false -> do_join2(PID, State)
+    end.
+
+do_join2(PID, State = #s{roster = Users}) ->
+    monitor(process, PID),
+    NewUser = #u{pid = PID},
+    NewRoster = usort([NewUser | Users]),
+    NewState  = State#s{roster = NewRoster},
+    ok = whisper(whoami, PID),
+    ok = gossip(roster, NewState),
+    {ok, NewState}.
+
+usort(Users) ->
+    lists:keysort(#u.pid, Users).
+
+
+-spec do_down(PID, State) -> NewState
+    when PID      :: pid(),
+         State    :: state(),
+         NewState :: state().
+% @private handle a user dying
+
+do_down(PID, State = #s{roster = Users}) ->
+    % remove from roster
+    NewUsers = lists:keydelete(PID, #u.pid, Users),
+    NewState = State#s{roster = NewUsers},
+    % broadcast username
+    ok = gossip(roster, NewState),
+    NewState.
+
+
+% @doc send a message to a specific person
+whisper(whoami, PID) ->
+    PID ! {webrtc, ["whoami", pidstr(PID)]},
+    ok.
+
+
+% @doc send a message to everyone
+gossip(roster, State = #s{roster = Us}) ->
+    Pids = [pidstr(PID) || #u{pid = PID} <- Us],
+    gossip_json(["roster", Pids], State).
+
+pidstr(PID) ->
+    unicode:characters_to_list(io_lib:format("~tp", [PID])).
+
+
+-spec gossip_json(zj:value(), state()) -> ok.
+% @private gossip a message to everyone
+
+gossip_json(Message, #s{roster = Users}) ->
+    GossipTo =
+        fun(#u{pid = PID}) ->
+            PID ! {webrtc, Message}
+        end,
+    lists:foreach(GossipTo, Users).
@@ -1,84 +0,0 @@
-% @doc hz helper functions
-module(fd_hz).
-
-export_type([
-]).
-
-export([
-    txs_current/0,
-    txs_since_height/1,
-    txs_minus/1,
-    txs_from_to/2,
-    current_height/0,
-    txs_of_height/1,
-    mhs_of_height/1,
-    txs_of_mh/1,
-    filter_spends/1,
-    filter_spend/1,
-    spend_info/1,
-    test/0
-]).
-
-
-spec test() -> no_return().
-
-test() ->
-    io:format("~tp~n", [hz:gen_current()]),
-    io:format("~tp~n", [hz:kb_current()]),
-    ok.
-
-
-
-txs_current() ->
-    H = current_height(),
-    txs_of_height(H).
-
-
-txs_since_height(H) ->
-    txs_from_to(H, current_height()).
-
-
-txs_minus(N) ->
-    H = current_height(),
-    L = H - N,
-    txs_from_to(L, H).
-
-
-txs_from_to(Min, Max) when Min =< Max ->
-    lists:append([txs_of_height(H) || H <- lists:seq(Min, Max)]);
-txs_from_to(Min, Max) when Min > Max ->
-    [].
-
-
-current_height() ->
-    {ok, H} = hz:kb_current_height(),
-    H.
-
-
-txs_of_height(Height) ->
-    lists:append([txs_of_mh(MH) || MH <- mhs_of_height(Height)]).
-
-
-spec mhs_of_height(Height :: pos_integer()) -> term().
-mhs_of_height(Height) ->
-    {ok, #{"micro_blocks" := MHs}} = hz:gen_by_height(Height),
-    MHs.
-
-
-txs_of_mh(MH) ->
-    {ok, TXs} = hz:mb_txs(MH),
-    TXs.
-
-
-filter_spends(TXs) ->
-    lists:filtermap(fun filter_spend/1, TXs).
-
-filter_spend(#{"tx" := TX = #{"type" := "SpendTx"}}) -> {true, spend_info(TX)};
-filter_spend(_)                                      -> false.
-
-
-spend_info(#{"type" := "SpendTx",
-             "recipient_id" := Recipient,
-             "amount" := Amount,
-             "payload" := Payload}) ->
-    {sp, Recipient, Amount, Payload}.
@@ -1,213 +0,0 @@
-% @doc spy: knows constraints {recipient, amount, payload}
-%
-% spies the chain for transactions that satisfy that constraint
-%
-module(fd_spy).
-vsn("0.2.0").
-
-% MVP: register search patterns
-% simply print to console when one of them is found
-
-behavior(gen_server).
-
-export_type([
-]).
-
-export([
-    %% caller context
-    reg/3,
-
-    %% api
-    start_link/0,
-
-    %% process context
-    init/1, handle_call/3, handle_cast/2, handle_info/2,
-    code_change/3, terminate/2
-]).
-
-% recipient is a string
-type pubkey32() :: <<_:256>>.
-
-record(sp,
-        {recipient  :: pubkey32(),
-         amount     :: pos_integer(),
-         payload    :: binary()}).
-type search_pattern() :: #sp{}.
-
-record(s,
-        {last_height_seen = none :: none | integer(),
-         searching_for    = []   :: [search_pattern()]}).
-
-type state() :: #s{}.
-
-include("$zx_include/zx_logger.hrl").
-
-%%-----------------------------------------------------------------------------
-%% caller context
-%%-----------------------------------------------------------------------------
-
-spec reg(Recipient, Amount, Payload) -> ok | {error, Reason}
-    when Recipient :: pubkey32(),
-         Amount    :: pos_integer(),
-         Payload   :: binary(),
-         Reason    :: any().
-
-reg(R, A, P) when is_binary(R), byte_size(R) =:= 32,
-                  is_integer(A), A >= 0,
-                  is_binary(P) ->
-    gen_server:call(?MODULE, {reg, R, A, P}).
-
-
-
-%% gen_server callbacks
-start_link() ->
-    gen_server:start_link({local, ?MODULE}, ?MODULE, none, []).
-
-
-%%-----------------------------------------------------------------------------
-%% process context below this line
-%%-----------------------------------------------------------------------------
-
-%% gen_server callbacks
-
-spec init(none) -> {ok, state()}.
-
-init(none) ->
-    tell("starting fd_spy"),
-    hz:chain_nodes(fewd:chain_nodes()),
-    erlang:send_after(1000, self(), check_chain),
-    InitState = #s{},
-    {ok, InitState}.
-
-
-
-spec handle_call(Msg, From, State) -> Result
-    when Msg      :: any(),
-         From     :: {pid(), reference()},
-         State    :: state(),
-         Result   :: {reply, Reply, NewState}
-                   | {noreply, NewState},
-         Reply    :: any(),
-         NewState :: state().
-
-handle_call({reg, Recipient, Amount, Payload}, _From, State) ->
-    {Reply, NewState} = do_reg(Recipient, Amount, Payload, State),
-    {reply, Reply, NewState};
-handle_call(Unexpected, From, State) ->
-    tell("~tp: unexpected call from ~tp: ~tp", [?MODULE, Unexpected, From]),
-    {noreply, State}.
-
-
-
-handle_cast(Unexpected, State) ->
-    tell("~tp: unexpected cast: ~tp", [?MODULE, Unexpected]),
-    {noreply, State}.
-
-
-
-handle_info(check_chain, State) ->
-    NewState = do_check_chain(State),
-    erlang:send_after(1000, self(), check_chain),
-    {noreply, NewState};
-handle_info(Unexpected, State) ->
-    tell("~tp: unexpected info: ~tp", [?MODULE, Unexpected]),
-    {noreply, State}.
-
-
-
-code_change(_, State, _) ->
-    {ok, State}.
-
-
-
-terminate(_, _) ->
-    ok.
-
-
-
-%%-----------------------------------------------------------------------------
-%% internals
-%%-----------------------------------------------------------------------------
-
-do_check_chain(State = #s{last_height_seen = none}) ->
-    case hz:kb_current_height() of
-        {ok, Max} ->
-            hh(Max-1, Max, State);
-        Error     ->
-            tell("~tp hz error: ~tp", [?MODULE, Error]),
-            State
-    end;
-do_check_chain(State = #s{last_height_seen = Min}) ->
-    case hz:kb_current_height() of
-        {ok, Max} ->
-            hh(Min, Max, State);
-        Error     ->
-            tell("~tp hz error: ~tp", [?MODULE, Error]),
-            State
-    end.
-
-% handle height
-hh(PrevHeight, NewHeight, State) when PrevHeight < NewHeight ->
-    tell("~tp cool: PrevHeight=~tp, NewHeight=~tp", [?MODULE, PrevHeight, NewHeight]),
-    Spends = fd_hz:filter_spends(fd_hz:txs_from_to(PrevHeight + 1, NewHeight)),
-    tell("~tp spends: ~tp", [?MODULE, Spends]),
-    NewState = State#s{last_height_seen = NewHeight},
-    NewState;
-hh(PrevHeight, NewHeight, State) when PrevHeight >= NewHeight ->
-    log(info, "~tp lame: PrevHeight=~tp, NewHeight=~tp", [?MODULE, PrevHeight, NewHeight]),
-    State.
-
-
-spec do_reg(Recipient, Amount, Payload, State) -> {Reply, NewState}
-    when Recipient :: pubkey32(),
-         Amount    :: pos_integer(),
-         Payload   :: binary(),
-         State     :: state(),
-         Reply     :: ok
-                    | {error, Reason},
-         Reason    :: any(),
-         NewState  :: state().
-
-do_reg(Recipient, Amount, Payload, State) ->
-    case already_registered(Recipient, Payload, State) of
-        true  -> {error, already_registered};
-        false -> really_register(Recipient, Amount, Payload, State)
-    end.
-
-
-
-spec already_registered(Recipient, Payload, State) -> boolean()
-    when Recipient :: pubkey32(),
-         Payload   :: binary(),
-         State     :: state().
-
-already_registered(Recipient, Payload, _State = #s{searching_for = SPs}) ->
-    ar(Recipient, Payload, SPs).
-
-ar(Recipient, Payload, [#sp{recipient=Recipient, payload=Payload} | _]) ->
-    true;
-ar(Recipient, Payload, [_ | Rest]) ->
-    ar(Recipient, Payload, Rest);
-ar(_, _, []) ->
-    false.
-
-
-
-spec really_register(Recipient, Amount, Payload, State) -> {Reply, NewState}
-    when Recipient :: pubkey32(),
-         Amount    :: pos_integer(),
-         Payload   :: binary(),
-         State     :: state(),
-         Reply     :: ok
-                    | {error, Reason},
-         Reason    :: any(),
-         NewState  :: state().
-
-really_register(R, A, P, State = #s{searching_for = SPs}) ->
-    NewSearchPattern = #sp{recipient = R,
-                           amount    = A,
-                           payload   = P},
-    tell("~tp: really_register(~tp,~tp,~tp)", [?MODULE, R, A, P]),
-    NewSearchPatterns = [NewSearchPattern | SPs],
-    NewState = State#s{searching_for = NewSearchPatterns},
-    {reply, ok, NewState}.
@@ -36,18 +36,6 @@ start_link() ->

 init([]) ->
    RestartStrategy = {one_for_one, 1, 60},
-    Spy       = {fd_spy,
-                 {fd_spy, start_link, []},
-                 permanent,
-                 5000,
-                 worker,
-                 [fd_spy]},
-    GridsD    = {fd_gridsd,
-                 {fd_gridsd, start_link, []},
-                 permanent,
-                 5000,
-                 worker,
-                 [fd_gridsd]},
    WFCd      = {fd_wfcd,
                 {fd_wfcd, start_link, []},
                 permanent,
@@ -60,5 +48,5 @@ init([]) ->
                 5000,
                 supervisor,
                 [fd_httpd]},
-    Children  = [Spy, GridsD, WFCd, Httpd],
+    Children  = [WFCd, Httpd],
    {ok, {RestartStrategy, Children}}.
@@ -9,34 +9,12 @@
 -copyright("Peter Harpending <peterharpending@qpq.swiss>").
 -license("BSD-2-Clause-FreeBSD").

-export([chain_nodes/0, url/0, host/0, network_id/0, pubkey/0, akstr/0]).
 -export([listen/1, ignore/0]).
 -export([start/2, stop/1]).

 -include("$zx_include/zx_logger.hrl").


-%% for testing: use mainnet
-%chain_nodes() ->
-%    [{"tsuriai.jp", 3013}].
-chain_nodes() ->
-    [{"tsuriai.jp", 4013}].
-
-url()        -> "http://" ++ host().
-host()       -> "localhost:8000".
-network_id() -> "groot.testnet".
-pubkey()     -> pad32(<<"fewd demo">>).
-akstr()      -> gmgrids:akstr(pubkey()).
-
-
-pad32(Bytes) ->
-    BS = byte_size(Bytes),
-    Spaces = << <<" ">>
-             || _ <- lists:seq(BS, 31)
-             >>,
-    <<Bytes/bytes, Spaces/bytes>>.
-
-
 -spec listen(PortNum) -> Result
    when PortNum :: inet:port_num(),
         Result  :: ok
@@ -64,7 +42,6 @@ ignore() ->
 %% See: http://erlang.org/doc/apps/kernel/application.html

 start(normal, _Args) ->
-    ok = application:ensure_started(hakuzaru),
    Result = fd_sup:start_link(),
    ok = listen(8000),
    Result.
@@ -1,618 +0,0 @@
-% @doc
-% GRIDS library: grids
-%
-% This module simply handles encoding and decoding of GRIDS URLs.
-%
-% For documentation on GRIDS see
-%
-%    https://git.qpq.swiss/QPQ-AG/research-megadoc/wiki/GRIDS
-% @end
-module(gmgrids).
-vsn("0.2.0").
-author("Peter Harpending <peterharpending@qpq.swiss>").
-copyright("2025 QPQ AG").
-license("MIT").
-
-% TODONE:
-%
-% TODO:
-%
-% - possibly input types should be iolists. I think for
-%   binaries it's fine
-% - change the types... don't need 3 different record types
-
-
-% FIXEDME:
-%
-% FIXME:
-
-export_type([
-    % field types
-    host/0,
-    target/0, akstr/0, pubkey/0,
-
-    % record types
-    grids/0
-]).
-
-export([
-    % convenience functions
-    %% currency granularities
-    p/0, kp/0, mp/0, gp/0, tp/0, pp/0,
-    g/0, kg/0, mg/0, gg/0, tg/0,
-    %% type fuckery
-    target_to_path/1, akstr/1, unakstr/1,
-    dummy_target/0,
-    %% convenience encoders
-    encode/2,
-
-    % "primitives"
-    %% record constructor
-    mk_grids/2,
-    %% primitive encoders
-    encode/1, encode/7, percent_encode/1,
-    %% decoder
-    decode/1
-]).
-
-
-%%-------------------------------------------------------------------
-%% API: TYPES
-%%-------------------------------------------------------------------
-
-% @doc Future-proofing... later this could be inet:addr() or whatever, or maybe
-% {Host, Port}. Keeping it simple for now
-type host() :: string().
-
-% @doc ak_... string
-type akstr() :: string().
-
-% @doc 32-byte public key
-type pubkey() :: <<_:256>>.
-
-% @doc later might want this to be flexible, "ak_..." etc
-%
-% FIXME: add support for all the different api keys: ak_..., ct_..., etc
-type target() :: pubkey()
-                | akstr().
-
-record(grids,
-        {secure      = true :: boolean(),
-         host               :: host(),
-         version     =   1  :: integer(),
-         instruction        :: dead_drop | spend | transfer,
-         path               :: string(),
-         amount      = none :: none | {value, integer()},
-         payload     = none :: none | {value, binary()}}).
-
-type grids() :: #grids{}.
-
-
-%%-------------------------------------------------------------------
-%% API: CONVENIENCE FUNCTIONS
-%%-------------------------------------------------------------------
-
-%% currency granularities
-p()  -> 1.
-kp() -> 1_000.
-mp() -> 1_000_000.
-gp() -> 1_000_000_000.
-tp() -> 1_000_000_000_000.
-pp() -> 1_000_000_000_000_000.
-g()  -> 1_000_000_000_000_000_000.
-kg() -> 1_000_000_000_000_000_000_000.
-mg() -> 1_000_000_000_000_000_000_000_000.
-gg() -> 1_000_000_000_000_000_000_000_000_000.
-tg() -> 1_000_000_000_000_000_000_000_000_000_000.
-
-
-spec target_to_path(Target) -> Path
-    when Target :: target(),
-         Path   :: string().
-% @doc
-% Internal function exported for convenience purposes
-%
-% If `Target' is an "ak_..." string, leave as-is. If it's a 32 byte public key
-% encode as an ak_... string
-
-target_to_path(Target) ->
-    i_ttp(iolist_to_binary(Target)).
-
-i_ttp(ApiStr = <<"ak_", _/binary>>) -> ApiStr;
-i_ttp(Pubkey = <<_:32/bytes>>)      -> akstr(Pubkey);
-i_ttp(BadTarget)                    -> error({invalid_target, BadTarget}).
-
-
-%% akstr/unakstr
-spec akstr(Pubkey) -> AkStr
-    when Pubkey :: pubkey(),
-         AkStr  :: akstr().
-% @doc
-% convert a 32-byte public key into an ak_... string
-
-akstr(PK) ->
-    unicode:characters_to_list(gmser_api_encoder:encode(account_pubkey, PK)).
-
-
-
-spec unakstr(AkStr) -> Pubkey
-    when Pubkey :: pubkey(),
-         AkStr  :: string().
-% @doc
-% convert an ak_... string into a 32-byte public key
-
-unakstr(Akstr) ->
-    {_, PK} = gmser_api_encoder:decode(unicode:characters_to_binary(Akstr)),
-    PK.
-
-
-
-spec dummy_target() -> akstr().
-% @doc Make a dummy public key. For testing purposes. NOT secure!
-
-dummy_target() ->
-    akstr(rand:bytes(32)).
-
-
-spec encode(Args, Options) -> URL
-    when Args      :: {dead_drop, Host, Path}
-                    | {spend, NetworkId, Recipient}
-                    | {transfer, Host, Path},
-         Host      :: iolist(),
-         Path      :: iolist(),
-         NetworkId :: iolist(),
-         Recipient :: target(),
-         Options   :: [Opt],
-         Opt       :: {secure, boolean()}
-                    | {version, integer()}
-                    | {amount, Amount}
-                    | {payload, Payload},
-         Amount     :: integer() | none | {value, integer()},
-         Payload    :: iolist()  | none | {value, iolist()},
-         URL        :: string().
-
-encode(Args, Opts) ->
-    encode(mk_grids(Args, Opts)).
-
-
-%%-------------------------------------------------------------------
-%% API: RECORD CONSTRUCTORS
-%%-------------------------------------------------------------------
-
-record(o,
-        {secure  = true :: boolean(),
-         version =   1  :: integer(),
-         amount  = none :: none | {value, integer()},
-         payload = none :: none | {value, binary()}}).
-
-spec mk_grids(Args, Options) -> Grids
-    when Args      :: {dead_drop, Host, Path}
-                    | {spend, NetworkId, Recipient}
-                    | {transfer, Host, Path},
-         Host      :: iolist(),
-         Path      :: iolist(),
-         NetworkId :: iolist(),
-         Recipient :: target(),
-         Options   :: [Opt],
-         Opt       :: {secure, boolean()}
-                    | {version, integer()}
-                    | {amount, Amount}
-                    | {payload, Payload},
-         Amount     :: integer() | none | {value, integer()},
-         Payload    :: iolist()  | none | {value, iolist()},
-         Grids      :: #grids{}.
-
-mk_grids(Args, Options) ->
-    #o{secure  = Secure,
-       version = Version,
-       amount  = MaybeAmount,
-       payload = MaybePayload} = i_valid_opts(Options),
-    {Instruction, HostStr, Path} =
-        case Args of
-            {dead_drop, H0, P0} ->
-                H1 = unicode:characters_to_list(H0),
-                P1 = unicode:characters_to_list(P0),
-                {dead_drop, H1, P1};
-            {spend, NetId0, Recip0} ->
-                NetId1 = unicode:characters_to_list(NetId0),
-                Recip1 = target_to_path(Recip0),
-                {spend, NetId1, Recip1};
-            {transfer, H0, P0} ->
-                H1 = unicode:characters_to_list(H0),
-                P1 = unicode:characters_to_list(P0),
-                {transfer, H1, P1}
-        end,
-    #grids{secure      = Secure,
-           host        = HostStr,
-           version     = Version,
-           instruction = Instruction,
-           path        = Path,
-           amount      = MaybeAmount,
-           payload     = MaybePayload}.
-
-
-i_valid_opts(Options) ->
-    Secure =
-        case proplists:get_value(secure, Options, true) of
-            S when is_boolean(S) -> S;
-            W                    -> error({invalid_option, {secure, W}})
-        end,
-    Version =
-        case proplists:get_value(version, Options, 1) of
-            V when is_integer(V) -> V;
-            X                    -> error({invalid_option, {version, X}})
-        end,
-    Amount =
-        case proplists:get_value(amount, Options, none) of
-            none                          -> none;
-            {value, N} when is_integer(N) -> {value, N};
-            N          when is_integer(N) -> {value, N};
-            Y                             -> error({invalid_option, {amount, Y}})
-        end,
-    Payload =
-        case proplists:get_value(payload, Options, none) of
-            none       -> none;
-            {value, P} -> {value, iolist_to_binary(P)};
-            P          -> {value, iolist_to_binary(P)}
-        end,
-    #o{secure     = Secure,
-       version    = Version,
-       amount     = Amount,
-       payload    = Payload}.
-
-
-
-
-%%-------------------------------------------------------------------
-%% API: ENCODING (Record -> URL)
-%%-------------------------------------------------------------------
-
-spec encode(GRIDS) -> URL
-    when GRIDS :: grids(),
-         URL   :: string().
-% @doc
-% Encode a grids record type
-% @end
-
-encode(#grids{secure      = Secure,
-              host        = Host,
-              version     = Vsn,
-              instruction = Instruction,
-              path        = Path,
-              amount      = Amt,
-              payload     = Payload}) ->
-    encode(Secure, Host, Vsn, Instruction, Path, Amt, Payload).
-
-
-spec encode(Secure, Host, Version, Instruction, Path, Amount, Payload) -> URL
-    when Secure      :: boolean(),
-         Host        :: host(),
-         Version     :: integer(),
-         Instruction :: dead_drop | spend | transfer,
-         Path        :: string(),
-         Amount      :: none | {value, integer()},
-         Payload     :: none | {value, binary()},
-         URL         :: string().
-% @doc
-% internal encode that's more verbose
-
-encode(Secure, Host, Version, Instruction, Path, Amount, Payload) ->
-    unicode:characters_to_list(
-        ["grid", i_encode_secure(Secure),
-         "://", i_encode_host(Host),
-         "/", integer_to_list(Version),
-         "/", i_encode_instruction(Instruction),
-         "/", Path,
-         i_encode_qstr(Amount, Payload)]
-    ).
-
-i_encode_secure(true)  -> "s";
-i_encode_secure(false) -> "".
-
-% future-proofing against more complicated host arguments
-i_encode_host(Host) -> Host.
-
-i_encode_instruction(dead_drop) -> "d";
-i_encode_instruction(spend)     -> "s";
-i_encode_instruction(transfer)  -> "t".
-
-i_encode_qstr(none, none) ->
-    "";
-i_encode_qstr({value, Amt}, none) ->
-    ["?a=", integer_to_list(Amt)];
-i_encode_qstr(none, {value, Payload}) ->
-    ["?p=", percent_encode(Payload)];
-i_encode_qstr({value, Amt}, {value, Payload}) ->
-    ["?a=", integer_to_list(Amt),
-     "&p=", percent_encode(Payload)].
-
-
-spec percent_encode(Payload) -> PercentEncoded
-    when Payload        :: binary(),
-         PercentEncoded :: iolist().
-% @doc
-% internal function to percent-encode binary payload
-% exported for convenience
-%
-% See: https://en.wikipedia.org/wiki/Percent-encoding
-
-percent_encode(Payload) when is_binary(Payload) ->
-    i_percent_encode(Payload, []).
-
-% unreserved characters
-i_percent_encode(<<C:8, Rest/binary>>, Acc)
-        when ($A =< C andalso C =< $Z) orelse
-             ($a =< C andalso C =< $z) orelse
-             ($0 =< C andalso C =< $9) orelse
-             (C =:= $-) orelse
-             (C =:= $_) orelse
-             (C =:= $~) orelse
-             (C =:= $.) ->
-    i_percent_encode(Rest, [Acc, C]);
-i_percent_encode(<<B:8, Rest/binary>>, Acc) ->
-    i_percent_encode(Rest, [Acc, i_pe_byte(B)]);
-i_percent_encode(<<>>, Result) ->
-    Result.
-
-% single hex digit
-i_pe_byte(B) when 16#00 =< B, B =< 16#0F -> ["%0", integer_to_list(B, 16)];
-i_pe_byte(B) when 16#10 =< B, B =< 16#FF -> ["%", integer_to_list(B, 16)].
-
-
-
-%%---------------------------------------------------------
-%% API: DECODING
-%%---------------------------------------------------------
-
-record(dt,
-        {secure      = undefined :: undefined | boolean(),
-         host        = undefined :: undefined | iolist(),
-         version     = undefined :: undefined | integer(),
-         instruction = undefined :: undefined | spend | transfer | dead_drop,
-         path        = undefined :: undefined | iolist(),
-         amount      = undefined :: undefined | none | {value, integer()},
-         payload     = undefined :: undefined | none | {value, binary()}}).
-
-% -type decode_target() :: #dt{}.
-
-
-spec decode(URL) -> Result
-    when URL    :: string(),
-         Result :: {ok, grids(), Remainder :: string()}
-                 | {error, Reason},
-         Reason :: term().
-
-decode(URL) ->
-    case i_decode(unicode:characters_to_binary(URL)) of
-        {ok, DT, Remainder} ->
-            {ok, i_decode_dt(DT), unicode:characters_to_list(Remainder)};
-        Error ->
-            Error
-    end.
-
-i_decode_dt(#dt{secure      = S,
-                host        = H,
-                version     = V,
-                path        = P,
-                instruction = Instruction,
-                amount      = A,
-                payload     = L}) ->
-    HStr = unicode:characters_to_list(H),
-    PStr = unicode:characters_to_list(P),
-    #grids{secure      = S,
-           host        = HStr,
-           version     = V,
-           path        = PStr,
-           instruction = Instruction,
-           amount      = A,
-           payload     = L}.
-
-
-i_decode(URL) ->
-    i_pipeline([fun i_decode_secure/2,
-                fun i_decode_host/2,
-                fun i_decode_version/2,
-                fun i_decode_instruction/2,
-                fun i_decode_path/2,
-                fun i_decode_qstr/2],
-                {ok, #dt{}, URL}).
-
-
-i_pipeline([Fun | Funs], Acc) ->
-    case Acc of
-        {ok, DT, URL} -> i_pipeline(Funs, Fun(DT, URL));
-        Error         -> Error
-    end;
-i_pipeline([], Result) ->
-    Result.
-
-
-i_decode_secure(DT = #dt{secure = undefined},
-                <<"grid://", Rest/binary>>) ->
-    {ok, DT#dt{secure = false}, Rest};
-i_decode_secure(DT = #dt{secure = undefined},
-                <<"grids://", Rest/binary>>) ->
-    {ok, DT#dt{secure = true}, Rest};
-i_decode_secure(_, URL) ->
-    {error, {bad_protocol, URL}}.
-
-
-
-i_decode_host(DT = #dt{host = undefined}, URL) ->
-    case idh2([], URL) of
-        {ok, Host, Rest} -> {ok, DT#dt{host = Host}, Rest};
-        Error            -> Error
-    end.
-
-% eliminate empty hosts and hosts not followed by /
-idh2([],   <<$/:8, _/binary>>)      -> {error, empty_host};
-idh2([],   <<>>)                    -> {error, empty_host};
-idh2(Host, <<>>)                    -> {error, {bad_host, Host}};
-idh2(Host, <<$/:8, Rest/binary>>)   -> {ok, Host, Rest};
-idh2(Acc,  <<Char:8, Rest/binary>>) -> idh2([Acc, Char], Rest).
-
-
-i_decode_version(DT = #dt{version = undefined}, URL) ->
-    case idv2([], URL) of
-        {ok, VStr, Rest} ->
-            Version = list_to_integer(unicode:characters_to_list(VStr)),
-            NewDT = DT#dt{version = Version},
-            {ok, NewDT, Rest};
-        Error ->
-            Error
-    end.
-
-idv2([],   <<$/:8, _/binary>>)    -> {error, empty_host};
-idv2([],   <<>>)                  -> {error, empty_host};
-idv2(Vstr, <<>>)                  -> {error, {bad_version, iolist_to_binary(Vstr)}};
-idv2(Vstr, <<$/:8, Rest/binary>>) -> {ok, Vstr, Rest};
-idv2(Acc,  <<N:8, Rest/binary>>)  ->
-    case ($0 =< N) andalso (N =< $9) of
-        true  -> idv2([Acc, N], Rest);
-        false -> {error, {illegal_version_char, [N]}}
-    end.
-
-i_decode_instruction(DT = #dt{instruction = undefined}, <<"s/", Rest/binary>>) ->
-    {ok, DT#dt{instruction = spend}, Rest};
-i_decode_instruction(DT = #dt{instruction = undefined}, <<"t/", Rest/binary>>) ->
-    {ok, DT#dt{instruction = transfer}, Rest};
-i_decode_instruction(DT = #dt{instruction = undefined}, <<"d/", Rest/binary>>) ->
-    {ok, DT#dt{instruction = dead_drop}, Rest};
-i_decode_instruction(_ = #dt{instruction = undefined}, Bad) ->
-    {error, {illegal_instruction, Bad}}.
-
-
-i_decode_path(DT = #dt{path = undefined}, URL) ->
-    {Path, Rest} = idp([], URL),
-    {ok, DT#dt{path = Path}, Rest}.
-
-% consume until we get to end of string or ?
-idp(Path, <<"?", Rest/binary>>) -> {Path, Rest};
-idp(Path, <<>>)                 -> {Path, <<>>};
-idp(Path, <<C:8, Rest/binary>>) -> idp([Path, C], Rest).
-
-
-i_decode_qstr(DT = #dt{amount = undefined, payload = undefined}, URL) ->
-    case idq([], URL) of
-        {ok, Proplist, Remainder} ->
-            Amount  = proplists:get_value(amount, Proplist, none),
-            Payload = proplists:get_value(payload, Proplist, none),
-            NewDT   = DT#dt{amount = Amount, payload = Payload},
-            {ok, NewDT, Remainder};
-        Error ->
-            Error
-    end.
-
-
-spec idq(Proplist, URL) -> Result
-    when URL        :: binary(),
-         Result     :: {ok, Proplist, Remainder}
-                     | {error, ParseError},
-         Proplist   :: [Prop],
-         Prop       :: {amount, {value, integer()}}
-                     | {payload, {value, binary()}},
-         ParseError :: any(),
-         Remainder  :: binary().
-
-idq(Params, <<"a=", Rest/binary>>) ->
-    case i_parse_amt(none, Rest) of
-        {ok, Amt, NewRest} ->
-            NewParams = [{amount, {value, Amt}} | Params],
-            idq(NewParams, NewRest);
-        Error ->
-            Error
-    end;
-idq(Params, <<"p=", Rest/binary>>) ->
-    case i_parse_payload(none, Rest) of
-        {ok, Payload, NewRest} ->
-            NewParams = [{payload, {value, Payload}} | Params],
-            idq(NewParams, NewRest);
-        Error ->
-            Error
-    end;
-idq(Params, Rest) ->
-    {ok, Params, Rest}.
-
-
-spec i_parse_amt(MaybeAmount, URL) -> Result
-    when URL         :: binary(),
-         Result      :: {ok, MaybeAmount, Rest}
-                      | {error, term()},
-         MaybeAmount :: none | {value, integer()},
-         Rest        :: binary().
-% @private context here is we have an a= and we're parsing what comes after
-% that
-%
-% we can error on empty amounts
-
-i_parse_amt(Acc, <<DigitChar:8, Rest/binary>>)
-        when $0 =< DigitChar, DigitChar =< $9 ->
-    DigitInt = DigitChar - $0,
-    NewAcc =
-        case Acc of
-            none       -> {value, DigitInt};
-            {value, N} -> {value, N*10 + DigitInt}
-        end,
-    i_parse_amt(NewAcc, Rest);
-% either end of string or non-digit char
-i_parse_amt(Acc, <<"&", Rest/binary>>) ->
-    case Acc of
-        {value, Amount} -> {ok, Amount, Rest};
-        none            -> {error, empty_amount}
-    end;
-i_parse_amt(Acc, Rest) ->
-    case Acc of
-        {value, Amount} -> {ok, Amount, Rest};
-        none            -> {error, empty_amount}
-    end.
-
-
-
-define(IS_HEX_CHAR(P), ((($0 =< P) andalso (P =< $9)) orelse
-                         (($A =< P) andalso (P =< $F)))).
-
-spec i_parse_payload(MaybePayload, URL) -> Result
-    when URL          :: binary(),
-         Result       :: {ok, MaybePayload, Rest}
-                       | {error, term()},
-         MaybePayload :: none | {value, binary()},
-         Rest         :: binary().
-
-% unreserved chars
-i_parse_payload(Acc, <<C:8, Rest/binary>>)
-        when ($A =< C andalso C =< $Z) orelse
-             ($a =< C andalso C =< $z) orelse
-             ($0 =< C andalso C =< $9) orelse
-             (C =:= $-) orelse
-             (C =:= $_) orelse
-             (C =:= $~) orelse
-             (C =:= $.) ->
-    NewAcc =
-        case Acc of
-            none           -> {value, <<C:8>>};
-            {value, Bytes} -> {value, <<Bytes/bytes, C:8>>}
-        end,
-    i_parse_payload(NewAcc, Rest);
-% percent char
-i_parse_payload(Acc, <<"%", A:8, B:8, Rest/binary>>)
-        when ?IS_HEX_CHAR(A), ?IS_HEX_CHAR(B) ->
-    AInt = list_to_integer([A], 16),
-    BInt = list_to_integer([B], 16),
-    NewByte = AInt*16 + BInt,
-    NewAcc =
-        case Acc of
-            none           -> {value, <<NewByte:8>>};
-            {value, Bytes} -> {value, <<Bytes/binary, NewByte:8>>}
-        end,
-    i_parse_payload(NewAcc, Rest);
-% random char
-i_parse_payload(Acc, <<"&", Rest/binary>>) ->
-    case Acc of
-        none             -> {error, empty_payload};
-        {value, Payload} -> {ok, Payload, Rest}
-    end;
-i_parse_payload(Acc, Rest) ->
-    case Acc of
-        none             -> {error, {illegal_payload, Rest}};
-        {value, Payload} -> {ok, Payload, Rest}
-    end.
@@ -16,7 +16,9 @@
    %% porcelain
    handshake/1,
    recv/3, recv/4,
-    send/2
+    recv_strict/3, recv_json/3,
+    send/2,
+    send_dwim/2, send_json/2
 ]).

 -include("http.hrl").
@@ -259,6 +261,54 @@ response_token(ChallengeToken) when is_binary(ChallengeToken) ->
    base64:encode(Sha1).


+-spec recv_json(Socket, Received, TimeoutMS) -> Result
+    when Socket    :: gen_tcp:socket(),
+         Received  :: binary(),
+         TimeoutMS :: non_neg_integer(),
+         Result    :: {ok, zj:value(), Remainder}
+                    | {error, Reason},
+         Remainder :: binary(),
+         Reason    :: any().
+% @doc
+% asserts response is text
+
+recv_json(Sock, Recv, TimeoutMS) ->
+    case recv_strict(Sock, Recv, TimeoutMS) of
+        {ok, {Type, Payload}, NewRecv} when Type =:= text orelse
+                                            Type =:= binary ->
+            case zj:decode(Payload) of
+                {ok, Value} ->
+                    io:format("~p value: ~p~n", [self(), Value]),
+                    {ok, Value, NewRecv};
+                Error       -> {error, {zj_decode, Error}}
+            end;
+        Error ->
+            Error
+    end.
+
+
+-spec recv_strict(Socket, Received, TimeoutMS) -> Result
+    when Socket    :: gen_tcp:socket(),
+         Received  :: binary(),
+         TimeoutMS :: non_neg_integer(),
+         Result    :: {ok, Message, Remainder}
+                    | {error, Reason},
+         Message   :: ws_msg(),
+         Remainder :: binary(),
+         Reason    :: any().
+% @doc
+% Almost equivalent to recv/3, but asserts resulting frames are empty
+
+recv_strict(Sock, Recv, TimeoutMS) ->
+    case recv(Sock, Recv, TimeoutMS) of
+        {ok, Message, [], Remainder} ->
+            {ok, Message, Remainder};
+        Illegal = {ok, _, _NonEmptyFrames, _} ->
+            {error, {bad_frame_stack, Illegal}};
+        Error ->
+            Error
+    end.
+

 -spec recv(Socket, Received, TimeoutMS) -> Result
    when Socket    :: gen_tcp:socket(),
@@ -604,10 +654,15 @@ recv_frame(Frame = #frame{payload_length = Len, payload = none}, Sock, Received,

 %% factoring this out into a function to reduce repetition
 recv_frame_await(Frame, Sock, Received, Timeout) ->
+    io:format("~p called: recv_frame_await(~p, ~p, ~p, ~p)~n",
+              [self(), Frame, Sock, Received, Timeout]),
    case inet:setopts(Sock, [{active, once}]) of
        ok ->
            receive
-                {tcp, Sock, Bin}          -> recv_frame(Frame, Sock, <<Received/bits, Bin/binary>>, Timeout);
+                {tcp, Sock, Bin}          ->
+                    io:format("~p calling: recv_frame(~p, ~p, ~p, ~p)~n",
+                        [self(),Frame, Sock, <<Received/bits, Bin/binary>>, Timeout]),
+                    recv_frame(Frame, Sock, <<Received/bits, Bin/binary>>, Timeout);
                {tcp_closed, Sock}        -> {error, tcp_closed};
                {tcp_error, Sock, Reason} -> {error, {tcp_error, Reason}}
            after Timeout ->
@@ -618,6 +673,34 @@ recv_frame_await(Frame, Sock, Received, Timeout) ->
    end.


+send_json(Socket, X) ->
+    send_dwim(Socket, {json, X}).
+
+
+-spec send_dwim(Socket, Message) -> Result
+    when Socket  :: gen_tcp:socket(),
+         Message :: string()
+                  | binary()
+                  | {json, zj:value()}
+                  | ws_msg(),
+         Result  :: ok
+                  | {error, Reason},
+         Reason  :: any().
+% @doc
+% equivalent to send/2 but assumes iolists/strings are meant to be `text`, and
+% naked binaries are meant to be `binary`
+%
+% lists are assumed to be unicode iolists and are converted to strings via
+% unicode:characters_to_list
+%
+% json is encoded as text and sent as such
+% @end
+
+send_dwim(Socket, X) when is_list(X)   -> send(Socket, {text, X});
+send_dwim(Socket, X) when is_binary(X) -> send(Socket, {binary, X});
+send_dwim(Socket, {json, X})           -> send(Socket, {text, zj:encode(X)});
+send_dwim(Socket, {Type, Payload})     -> send(Socket, {Type, Payload}).
+

 -spec send(Socket, Message) -> Result
    when Socket  :: gen_tcp:socket(),
@@ -5,18 +5,7 @@
 {prefix,"fd"}.
 {desc,"Front End Web Dev in Erlang stuff"}.
 {package_id,{"otpr","fewd",{0,2,0}}}.
-{deps,[{"otpr","hakuzaru",{0,8,3}},
-            {"otpr","sophia",{9,0,0}},
-            {"otpr","gmserialization",{0,1,3}},
-                {"otpr","eblake2",{1,0,1}},
-                {"otpr","base58",{0,1,1}},
-            {"otpr","gmbytecode",{3,4,1}},
-            {"otpr","base58",{0,1,1}},
-            {"otpr","eblake2",{1,0,1}},
-            {"otpr","ec_utils",{1,0,0}},
-            {"otpr","zj",{1,1,2}},
-            {"otpr","getopt",{1,0,2}},
-       {"otpr","qr",{0,1,0}}]}.
+{deps,[{"otpr","zj",{1,1,2}}]}.
 {key_name,none}.
 {a_email,"peterharpending@qpq.swiss"}.
 {c_email,"peterharpending@qpq.swiss"}.
Author	SHA1	Message	Date
pharpend	079009a13e	[wip] now display user's camera next tricky thing is connecting users	2026-02-24 10:40:43 -08:00
pharpend	484eea92e4	have call box	2026-02-12 20:54:58 -08:00
pharpend	08c0119ae0	have a roster and a whoami	2026-02-12 20:32:34 -08:00
pharpend	db6d244cb6	finished code surgery patient is comatose and is missing both testicles and eyeballs but is legally alive	2026-02-12 19:31:08 -08:00
Peter Harpending	4a0e221790	Merge remote-tracking branch 'refs/remotes/origin/f-webrtc' into f-webrtc	2026-02-12 18:01:37 -08:00
Peter Harpending	d348fe7cd1	Merge remote-tracking branch 'refs/remotes/origin/f-webrtc' into f-webrtc	2026-02-12 18:01:29 -08:00
pharpend	ad5df4f550	merging	2026-02-12 17:57:29 -08:00
Peter Harpending	b63130a061	stash	2026-02-12 10:14:16 -08:00
pharpend	b871968f8c	roster kind of sort of works	2026-02-09 21:11:53 -08:00
pharpend	6028bb5850	roster is broadcast	2026-02-09 20:48:43 -08:00
pharpend	25a775ee96	webrtc frontend can request username from backend	2026-02-09 16:24:33 -08:00
Peter Harpending	b6436c84ee	wip	2026-02-09 14:48:47 -08:00
pharpend	cc95fc5829	webrtc	2026-02-09 12:54:45 -08:00
pharpend	ce7b8a1ccd	add webrtc grok demo	2026-02-04 21:59:37 -08:00
				`@@ -1 +0,0 @@`
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				`@@ -0,0 +1 @@`
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