Implement level rewards

src/main/java/emu/nebula/util/Bitset.java

@@ -39,6 +39,19 @@ public class Bitset {
         this.data[longArrayOffset] |= (1L << bytePosition);
     }
     
+    public void unsetBit(int index) {
+        int longArrayOffset = (int) Math.floor((index - 1) / 64D);
+        int bytePosition = ((index - 1) % 64);
+        
+        if (longArrayOffset >= this.data.length) {
+            var oldData = this.data;
+            this.data = new long[longArrayOffset + 1];
+            System.arraycopy(oldData, 0, this.data, 0, oldData.length);
+        }
+        
+        this.data[longArrayOffset] &= (1L << bytePosition);
+    }
+    
     public byte[] toByteArray() {
         byte[] array = new byte[this.getData().length * 8];
 
@@ -53,4 +66,19 @@ public class Bitset {
         
         return array;
     }
+    
+    public byte[] toBigEndianByteArray() {
+        byte[] array = new byte[this.getData().length * 8];
+
+        for (int i = 0; i < this.getData().length; i++) {
+            long value = this.getData()[i];
+            
+            for (int x = 0; x <= 7; x++) {
+                array[(i * 8) + x] = (byte) (value & 0xFF);
+                value >>= Byte.SIZE;
+            }
+        }
+        
+        return array;
+    }
 }