Use ByteArray for map key, fix auth loops

common/src/main/java/io/bitsquare/common/ByteArray.java

@@ -0,0 +1,32 @@
+package io.bitsquare.common;
+
+import io.bitsquare.app.Version;
+
+import java.io.Serializable;
+import java.util.Arrays;
+
+public class ByteArray implements Serializable {
+    // That object is sent over the wire, so we need to take care of version compatibility.
+    private static final long serialVersionUID = Version.NETWORK_PROTOCOL_VERSION;
+
+    public final byte[] bytes;
+
+    public ByteArray(byte[] bytes) {
+        this.bytes = bytes;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof ByteArray)) return false;
+
+        ByteArray byteArray = (ByteArray) o;
+
+        return Arrays.equals(bytes, byteArray.bytes);
+    }
+
+    @Override
+    public int hashCode() {
+        return bytes != null ? Arrays.hashCode(bytes) : 0;
+    }
+}