added node modules back to the example bot, so it exports with the required modules

node_modules/b4a/lib/hex.js

@@ -0,0 +1,51 @@
+function byteLength (string) {
+  return string.length >>> 1
+}
+
+function toString (buffer) {
+  const len = buffer.byteLength
+
+  buffer = new DataView(buffer.buffer, buffer.byteOffset, len)
+
+  let result = ''
+  let i = 0
+
+  for (let n = len - (len % 4); i < n; i += 4) {
+    result += buffer.getUint32(i).toString(16).padStart(8, '0')
+  }
+
+  for (; i < len; i++) {
+    result += buffer.getUint8(i).toString(16).padStart(2, '0')
+  }
+
+  return result
+}
+
+function write (buffer, string, offset = 0, length = byteLength(string)) {
+  const len = Math.min(length, buffer.byteLength - offset)
+
+  for (let i = 0; i < len; i++) {
+    const a = hexValue(string.charCodeAt(i * 2))
+    const b = hexValue(string.charCodeAt(i * 2 + 1))
+
+    if (a === undefined || b === undefined) {
+      return buffer.subarray(0, i)
+    }
+
+    buffer[offset + i] = (a << 4) | b
+  }
+
+  return len
+}
+
+module.exports = {
+  byteLength,
+  toString,
+  write
+}
+
+function hexValue (char) {
+  if (char >= 0x30 && char <= 0x39) return char - 0x30
+  if (char >= 0x41 && char <= 0x46) return char - 0x41 + 10
+  if (char >= 0x61 && char <= 0x66) return char - 0x61 + 10
+}