refactored ./src/types/path-set (#84)

Refactored PathSet, Path, and Hop types. Constructing these types with Buffers, and using class instead of makeClass.

packages/ripple-binary-codec/src/serdes/binary-parser.ts

@@ -16,6 +16,16 @@ class BinaryParser {
     this.bytes = Buffer.from(hexBytes, "hex");
   }
 
+  /**
+   * Peek the first byte of the BinaryParser
+   *
+   * @returns The first byte of the BinaryParser
+   */
+  peek(): number {
+    assert(this.bytes.byteLength !== 0);
+    return this.bytes[0];
+  }
+
   /**
    * Consume the first n bytes of the BinaryParser
    *
@@ -33,7 +43,10 @@ class BinaryParser {
    * @return The bytes
    */
   read(n: number): Buffer {
-    assert(n <= this.bytes.byteLength, n + " greater than " + this.bytes.byteLength);
+    assert(
+      n <= this.bytes.byteLength,
+      n + " greater than " + this.bytes.byteLength
+    );
 
     const slice = this.bytes.slice(0, n);
     this.skip(n);