Filterable attributes, Int64 entity

js/entity/Integer64Entity.js

@@ -0,0 +1,29 @@
+import IEntity from "./IEntity"
+
+export default class Integer64Entity extends IEntity {
+
+    static attributes = {
+        ...super.attributes,
+        value: {
+            value: 0n,
+            predicate: v => v >= -(1n << 63n) && v < 1n << 63n,
+        },
+    }
+
+    static {
+        this.cleanupAttributes(this.attributes)
+    }
+
+    constructor(value = 0) {
+        super(value)
+        /** @type {Number} */ this.value
+    }
+
+    valueOf() {
+        return this.value
+    }
+
+    toString() {
+        return this.value.toString()
+    }
+}