All cleaned up and working perfectly.

Fixed a bug in the bitcoinjs lib that was breaking the link to your wallet on the win page.

docs/index.html

@@ -348,6 +348,7 @@ <h2 style="margin-block-start:0.2em;">CONNECTION LOST</h2>
     // Our wallet info, generated once on page load
     window.testmode = false;            // Test or Main. Set if URL contains "TESTMODE".
     window.keyPair;                     // User's keypair
+    window.network;
 
     // Info on current round, based on data received over the websocket
     // TODO: Package this block stuff into an object to keep it neat
@@ -702,24 +703,23 @@ <h2 style="margin-block-start:0.2em;">CONNECTION LOST</h2>
 
 <script>
 
-    function getAddressFromKeyPair( kp ) {
-        bitcoinjs.payments.p2pkh({ pubkey: kp.publicKey ,  network  }).address;
-    }
-
-    let network;
-
     if (testmode) {
-        network = bitcoinjs.networks.testnet;
+        window.network = bitcoinjs.networks.testnet;
     } else {
-        network = bitcoinjs.networks.main;
+        window.network = bitcoinjs.networks.bitcoin;
     }
 
-    window.keyPair = bitcoinjs.ECPair.makeRandom( {network: network} );
+    window.keyPair = bitcoinjs.ECPair.makeRandom( {network: window.network} );
 
     console.log( "Prize redemption key (do not tell to ANYONE or they can claim your prizes!):"+ window.keyPair.toWIF());
     // You can test WIFs at http://gobittest.appspot.com/PrivateKey or import them into bitcoin-core
     // with the commmand "importprivkey [key] [name for key in wallet]"
 
+    // (This was not working due to a bug in this version of bitcoinjs, but now it does thanks to ChatGPT!)
+    function getAddressFromKeyPair( kp ) {
+        return bitcoinjs.payments.p2pkh({ pubkey: kp.publicKey }).address;
+    }
+
 </script>
 
 <!--- MEAT OF THE CODE RUNS HERE WHENEVER A KENO CELL IS CLICKED. WE UPDATE THE EXTRANONCE, GENERATE A BLOCK, AND CHECK THE NEW HASH FOR A WIN. --->
@@ -992,9 +992,9 @@ <h2 style="margin-block-start:0.2em;">CONNECTION LOST</h2>
         document.writeln("   your prize. Do not share it with anyone who you do not 100% trust since anyone");
         document.writeln("   with this code can claim your prize. </p>");
         document.writeln("<h2>Status check links</h2>");
-        document.writeln("<a target='_blank' href='https://btc.com/"+blockHeaderHashHexString+"'>Check if solution was accepted by the network</a>");
+        document.writeln("<a target='_blank' href='https://explorer.btc.com/btc/search/"+blockHeaderHashHexString+"'>Check if solution was accepted by the network</a>");
         document.writeln("<br>");
-        document.writeln("<a target='_blank' href='https://btc.com/"+getAddressFromKeyPair(window.keyPair)+"'>Check if prize is available to be claimed</a>");
+        document.writeln("<a target='_blank' href='https://explorer.btc.com/btc/search/"+getAddressFromKeyPair(window.keyPair)+"'>Check if prize is available to be claimed</a>");
 
         document.writeln("<h2>Live Submision Updates Here</h2>");
 

docs/info.html

@@ -111,7 +111,8 @@ <h1>FAQ</h1>
 </p>
 
 <p><B>Q: What does the blinking green HASHHUNT logo mean?</b><br>
-    A: This is a visual indication that you are still connected to the server. It should blink about once every 15 seconds.
+    A: This is a visual indication that you are still connected to the server. It should blink green about once every 15 seconds while
+    connected, or turn red if the connection is lost.
 </p>
 
 <p id="why-http"><b>Q: Why does Hash Hunt only run over http and not https?</b><br>

node-server/index.js

@@ -322,6 +322,29 @@ function starupNewWsConnection( ws , lastBlockBuffer ) {
 
 }
 
+// Convert difficulty that we get from `bitcoin-cli difficulty` to nbits that we can efficiently send to the client
+// https://bitcoin.stackexchange.com/a/80974/113175
+function difficulty2bits(difficulty) {
+    if (difficulty < 0) throw 'difficulty cannot be negative';
+    if (!isFinite(difficulty)) throw 'difficulty cannot be infinite';
+    for (var shiftBytes = 1; true; shiftBytes++) {
+        var word = (0x00ffff * Math.pow(0x100, shiftBytes)) / difficulty;
+        if (word >= 0xffff) break;
+    }
+    word &= 0xffffff; // convert to int < 0xffffff
+    var size = 0x1d - shiftBytes;
+    // the 0x00800000 bit denotes the sign, so if it is already set, divide the
+    // mantissa by 0x100 and increase the size by a byte
+    if (word & 0x800000) {
+        word >>= 8;
+        size++;
+    }
+    if ((word & ~0x007fffff) != 0) throw 'the \'bits\' \'word\' is out of bounds';
+    if (size > 0xff) throw 'the \'bits\' \'size\' is out of bounds';
+    var bits = (size << 24) | word;
+    return bits;
+}
+
 // Whenever bitcoin-core gets a new block, then calls the `blocknotify` batch file, which then makes
 // a `curl` call to us with the new blockhash and difficulty.
 // nbits and height are numbers, blockhash and lastBlockBuffer are buffers