xahau-patch

packages/xahau-address-codec/src/utils.ts

@@ -0,0 +1,41 @@
+export type ByteArray = number[] | Uint8Array
+
+/**
+ * Check whether two sequences (e.g. Arrays of numbers) are equal.
+ *
+ * @param arr1 - One of the arrays to compare.
+ * @param arr2 - The other array to compare.
+ */
+export function arrayEqual(arr1: ByteArray, arr2: ByteArray): boolean {
+  if (arr1.length !== arr2.length) {
+    return false
+  }
+  return arr1.every((value, index) => value === arr2[index])
+}
+
+/**
+ * Check whether a value is a scalar
+ *
+ * @param val - The value to check.
+ */
+function isScalar(val: ByteArray | number): val is number {
+  return typeof val === 'number'
+}
+
+/**
+ * Concatenate all `arguments` into a single array. Each argument can be either
+ * a single element or a sequence, which has a `length` property and supports
+ * element retrieval via sequence[ix].
+ *
+ * > concatArgs(1, [2, 3], Uint8Array.from([4,5]), new Uint8Array([6, 7]));
+ * [1,2,3,4,5,6,7]
+ *
+ * @param args - Concatenate of these args into a single array.
+ * @returns Array of concatenated arguments
+ */
+
+export function concatArgs(...args: Array<number | ByteArray>): number[] {
+  return args.flatMap((arg) => {
+    return isScalar(arg) ? [arg] : Array.from(arg)
+  })
+}