simplify max IP check

Author: zefir-git

src/IPv4.ts

@@ -17,7 +17,8 @@ export class IPv4 extends IPAddress {
 
     public constructor(value: number | bigint) {
         const int = BigInt(value);
-        if (int < 0n || int > 0xFFFFFFFFn) throw new TypeError("Expected 32-bit unsigned integer, got " + int.constructor.name + " " + int.toString(10));
+        if (int < 0n || int > (1n << BigInt(IPv4.bitLength)) - 1n)
+            throw new TypeError("Expected 32-bit unsigned integer, got " + int.constructor.name + " " + int.toString(10));
         super(int);
     }
 

src/IPv6.ts

@@ -10,7 +10,7 @@ export class IPv6 extends IPAddress {
      * Create new IPv6 address instance
      */
     public constructor(value: bigint) {
-        if (value < 0n || value > 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFn)
+        if (value < 0n || value > ((1n << BigInt(IPv6.bitLength)) - 1n))
             throw new TypeError("Expected 128-bit unsigned integer, got " + value.constructor.name + " 0x" + value.toString(16));
         super(value);
     }