Use Kraken and Coinbase market data

.env.example

@@ -5,12 +5,11 @@
 #
 # These four are the Polymarket-traded names. Format:
 #   SYM:Name:coingecko-id[,SYM:Name:id…]
-# Optional 4th field: Binance symbol if it is not SYM+USDT.
+# A legacy fourth field is accepted and reduced to its base symbol.
 #
 # install.sh then asks for extra tickers to chart. It looks each one up on
-# CoinGecko (id + name) and checks Binance for a USDT pair. No pair is fine:
-# the server already serves those from CoinGecko. You can also add tokens later
-# in ⚙ search.
+# CoinGecko (id + name). Runtime prices and candles come from Kraken with
+# Coinbase fallback. You can also add tokens later in ⚙ search.
 
 POLYDISPLAY_ASSETS="BTC:Bitcoin:bitcoin,ETH:Ethereum:ethereum,SOL:Solana:solana,XRP:XRP:ripple"
 
@@ -23,5 +22,5 @@ POLYDISPLAY_ASSETS="BTC:Bitcoin:bitcoin,ETH:Ethereum:ethereum,SOL:Solana:solana,
 # POLYDISPLAY_PIN=000000
 # POLYDISPLAY_TOKEN_SECRET=
 
-# Optional: free CoinGecko demo key for higher rate limits
+# Optional: free CoinGecko demo key used only by asset search
 # CG_DEMO_KEY=

README.md

@@ -11,13 +11,14 @@ a P/L card (the day's profit as polymarket.com reports it, over a 30-day
 sparkline, with the 7d, 30d, and all-time figures), then the open positions
 and recent activity. Right column is charts for a mix of trading and
 monitoring assets. A Go process on the host serves the page and talks to Polymarket,
-Binance, and CoinGecko. Browsers only talk to that process.
+Kraken, and Coinbase. CoinGecko is used only for asset search. Browsers only talk
+to that process.
 
 ```
  ┌────────────┐   http        ┌─────────────────────────────┐   https
  │  pad /     │ ────────────► │  polydisplayd (Go)          │ ──► Polymarket
- │  browser   │  /api/state   │   polls + caches            │ ──► Binance
- │            │ ◄──────────── │   serves the page           │ ──► CoinGecko
+ │  browser   │  /api/state   │   polls + caches            │ ──► Kraken
+ │            │ ◄──────────── │   serves the page           │ ──► Coinbase
  └────────────┘               │   /api/config, /api/search  │
                               └─────────────────────────────┘
 ```
@@ -36,8 +37,8 @@ Default listen port is 8080 (`POLYDISPLAY_PORT`). Dark/light follows the device.
 Downloads Go if needed, asks for a Polymarket public address (`0x...`), writes
 `config.json`, builds `polydisplayd`, and installs a login service: LaunchAgent
 on macOS, systemd user unit on Linux. At the prompt you can add extra tickers;
-those are looked up on CoinGecko. Binance is used at runtime when a USDT pair
-exists, otherwise CoinGecko.
+those are looked up on CoinGecko. Kraken supplies runtime prices and candles,
+with Coinbase as the fallback.
 
 ```bash
 POLYMARKET_WALLET=0x... POLYDISPLAY_EXTRA_ASSETS=FLR,HBAR ./install.sh
@@ -118,7 +119,7 @@ search, or run `./install.sh` again and add them at the prompt.
 
 Port: `POLYDISPLAY_PORT` in `.env`, else `config.json` `port`, else 8080.
 Wallet and candle range: ⚙ or `config.json`. Pad PIN: `POLYDISPLAY_PIN` in
-`.env`. Optional `CG_DEMO_KEY` in `.env` for a higher CoinGecko rate limit.
+`.env`. Optional `CG_DEMO_KEY` in `.env` applies only to asset search.
 
 If ⚙ has saved a `coins` list into `config.json`, that list wins until you
 delete the `coins` key. `config.json` and `.env` are gitignored.
@@ -128,7 +129,8 @@ Logs: `polydisplay.log` in the working directory. Rolled at local midnight to
 
 ## Data
 
-Candles and prices: Binance when a USDT pair exists, otherwise CoinGecko.
+Candles and prices: Kraken, with Coinbase fallback. Kraken ticker prices are
+fetched in one request; OHLC requests are paced to its public API guidance.
 Positions and activity: Polymarket data-api, polled every 30s. Account P/L:
 Polymarket user-pnl-api, 720 hourly points over 30 days, polled every 2 min
 and thinned to 120 points for the sparkline. Gamma market metadata supplies

com.novatechflow.polydisplay.plist

@@ -39,7 +39,7 @@
   <string>/dev/null</string>
   <key>EnvironmentVariables</key>
   <dict>
-    <!-- optional: paste a free CoinGecko demo key for higher rate limits -->
+    <!-- optional: CoinGecko key used only by asset search -->
     <key>CG_DEMO_KEY</key>
     <string></string>
   </dict>

index.html

@@ -20,7 +20,7 @@
 
   polyDisplay - LAN web app: Polymarket positions + crypto watchlist.
   The browser talks ONLY to the local Go server (/api/*): it aggregates
-  Polymarket + crypto (Binance-first, CoinGecko fallback) so the display
+  Polymarket + crypto (Kraken-first, Coinbase fallback) so the display
   never hits an external API, rate limit, or geoblock.
 -->
 <style>
@@ -196,7 +196,7 @@ <h3>Settings</h3>
       <button class="btn primary" id="saveBtn">Save &amp; reload</button>
     </div>
     <button class="btn" id="reloadBtn" style="width:100%;margin-top:10px">Reload app &middot; clear cache</button>
-    <div class="muted" style="margin-top:10px">Saved on the server (config.json). Data source: Binance &rarr; CoinGecko fallback.</div>
+    <div class="muted" style="margin-top:10px">Saved on the server (config.json). Data source: Kraken &rarr; Coinbase fallback.</div>
   </div>
 </div>
 
@@ -564,7 +564,7 @@ <h3>Unlock pad</h3>
   if(!coins.length){ cl='<div class="empty">No assets. Tap &#9881; to add.</div>'; }
   for(var k=0;k<coins.length;k++){
     var c=coins[k];
-    var tag=c.source?('<span class="srctag">'+(c.source==="binance"?"Binance":"CoinGecko")+'</span>'):"";
+    var tag=c.source?('<span class="srctag">'+(c.source==="kraken"?"Kraken":"Coinbase")+'</span>'):"";
     cl+='<div class="coin'+(c.active?' active':'')+'"><div class="top">'+
       '<div><span class="sym">'+esc(c.sym)+'</span><span class="name">'+esc(c.name)+'</span></div>'+
       '<div><span class="val">'+fmtUsd(c.price)+'</span>'+

install.sh

@@ -180,11 +180,11 @@ ensure_auth() {
   echo "Clearing site data on the pad means typing the PIN again."
 }
 
-# CoinGecko search for id+name; Binance ticker tells us if SYM+USDT exists.
-# Prints "SYM:Name:id<TAB>binance|coingecko" or exits non-zero.
+# CoinGecko search supplies a stable id and display name. Runtime market data
+# comes from Kraken with Coinbase fallback.
 resolve_asset() {
   py - "$1" <<'PY'
-import json, sys, urllib.error, urllib.parse, urllib.request
+import json, sys, urllib.parse, urllib.request
 
 q = sys.argv[1].strip()
 if not q:
@@ -217,30 +217,16 @@ name = pick.get("name") or sym
 cid = pick.get("id") or ""
 if not cid:
     sys.exit(4)
-src = "coingecko"
-try:
-    urllib.request.urlopen(
-        urllib.request.Request(
-            "https://api.binance.com/api/v3/ticker/24hr?symbol=" + urllib.parse.quote(sym + "USDT"),
-            headers=ua,
-        ),
-        timeout=10,
-    )
-    src = "binance"
-except urllib.error.HTTPError:
-    pass
-except Exception:
-    pass
-print("%s:%s:%s\t%s" % (sym, name, cid, src))
+print("%s:%s:%s" % (sym, name, cid))
 PY
 }
 
 ask_assets() {
-  local extra raw spec src line
+  local extra raw spec line
   extra="${POLYDISPLAY_EXTRA_ASSETS:-}"
   if [ -z "$extra" ] && [ -t 0 ]; then
     echo "Watchlist starts with BTC, ETH, SOL, XRP (Polymarket)."
-    echo "Extra names are looked up on CoinGecko; Binance is used when a USDT pair exists."
+    echo "Extra names are looked up on CoinGecko; charts use Kraken then Coinbase."
     read -r -p "Additional assets to chart (tickers or names, comma-separated, empty to skip): " extra
   fi
   [ -n "$extra" ] || return 0
@@ -251,9 +237,7 @@ ask_assets() {
     line="$(echo "$line" | sed 's/^[[:space:]]*//;s/[[:space:]]*$//')"
     [ -n "$line" ] || continue
     if spec="$(resolve_asset "$line")"; then
-      src="${spec##*$'\t'}"
-      spec="${spec%%$'\t'*}"
-      echo "   $spec  ($src)"
+      echo "   $spec"
       specs+=("$spec")
     else
       echo "   skip $line (not found on CoinGecko)"