fix: type issue after ts5.7 (#14)

Author: himself65

src/base32.ts

@@ -1,6 +1,6 @@
 //inspired by oslo implementation by pilcrowonpaper: https://github.com/pilcrowonpaper/oslo/blob/main/src/encoding/base32.ts
 
-import type { TypedArray } from "./type";
+import type { TypedArray, Uint8Array_ } from "./type";
 
 /**
  * Returns the Base32 alphabet based on the encoding type.
@@ -34,7 +34,7 @@ function createDecodeMap(alphabet: string): Map<string, number> {
  * @returns The Base32 encoded string.
  */
 function base32Encode(
-	data: Uint8Array,
+	data: Uint8Array_,
 	alphabet: string,
 	padding: boolean,
 ): string {
@@ -69,7 +69,7 @@ function base32Encode(
  * @param alphabet - The Base32 alphabet to use.
  * @returns The decoded Uint8Array.
  */
-function base32Decode(data: string, alphabet: string): Uint8Array {
+function base32Decode(data: string, alphabet: string): Uint8Array_ {
 	const decodeMap = createDecodeMap(alphabet);
 	const result: number[] = [];
 	let buffer = 0;
@@ -120,7 +120,7 @@ export const base32 = {
 	 * @param data - The Base32 encoded string or ArrayBuffer/TypedArray.
 	 * @returns The decoded Uint8Array.
 	 */
-	decode(data: string | ArrayBuffer | TypedArray): Uint8Array {
+	decode(data: string | ArrayBuffer | TypedArray): Uint8Array_ {
 		if (typeof data !== "string") {
 			data = new TextDecoder().decode(data);
 		}
@@ -156,7 +156,7 @@ export const base32hex = {
 	 * @param data - The Base32hex encoded string.
 	 * @returns The decoded Uint8Array.
 	 */
-	decode(data: string): Uint8Array {
+	decode(data: string): Uint8Array_ {
 		const alphabet = getAlphabet(true);
 		return base32Decode(data, alphabet);
 	},

src/base64.ts

@@ -1,6 +1,6 @@
 //inspired by oslo implementation by pilcrowonpaper: https://github.com/pilcrowonpaper/oslo/blob/main/src/encoding/base64.ts
 
-import type { TypedArray } from "./type";
+import type { TypedArray, Uint8Array_ } from "./type";
 
 function getAlphabet(urlSafe: boolean): string {
 	return urlSafe
@@ -9,7 +9,7 @@ function getAlphabet(urlSafe: boolean): string {
 }
 
 function base64Encode(
-	data: Uint8Array,
+	data: Uint8Array_,
 	alphabet: string,
 	padding: boolean,
 ): string {
@@ -38,7 +38,7 @@ function base64Encode(
 	return result;
 }
 
-function base64Decode(data: string, alphabet: string): Uint8Array {
+function base64Decode(data: string, alphabet: string): Uint8Array_ {
 	const decodeMap = new Map<string, number>();
 	for (let i = 0; i < alphabet.length; i++) {
 		decodeMap.set(alphabet[i]!, i);

src/type.ts

@@ -10,6 +10,22 @@ export type TypedArray =
 	| BigInt64Array
 	| BigUint64Array;
 
+/**
+ * Equivalent to `Uint8Array` before TypeScript 5.7, and `Uint8Array<ArrayBuffer>` in TypeScript 5.7
+ * and beyond.
+ *
+ * **Context**
+ *
+ * `Uint8Array` became a generic type in TypeScript 5.7, requiring types defined simply as
+ * `Uint8Array` to be refactored to `Uint8Array<ArrayBuffer>` starting in Deno 2.2. `Uint8Array` is
+ * _not_ generic in Deno 2.1.x and earlier, though, so this type helps bridge this gap.
+ *
+ * Inspired by Deno's std library:
+ *
+ * https://github.com/denoland/std/blob/b5a5fe4f96b91c1fe8dba5cc0270092dd11d3287/bytes/_types.ts#L11
+ */
+export type Uint8Array_ = ReturnType<Uint8Array["slice"]>;
+
 export type SHAFamily = "SHA-1" | "SHA-256" | "SHA-384" | "SHA-512";
 export type EncodingFormat =
 	| "hex"