@creit.tech/stellar-wallets-kit
Version:
A kit to handle all Stellar Wallets at once
92 lines (91 loc) • 2.86 kB
JavaScript
;
// Copyright 2018-2025 the Deno authors. MIT license.
// Copyright (c) 2014 Jameson Little. MIT License.
// This module is browser compatible.
Object.defineProperty(exports, "__esModule", { value: true });
exports.encodeBase32 = encodeBase32;
exports.decodeBase32 = decodeBase32;
/**
* Utilities for
* {@link https://www.rfc-editor.org/rfc/rfc4648.html#section-6 | base32}
* encoding and decoding.
*
* Modified from {@link https://github.com/beatgammit/base64-js}.
*
* ```ts
* import { encodeBase32, decodeBase32 } from "@std/encoding/base32";
* import { assertEquals } from "@std/assert";
*
* assertEquals(encodeBase32("foobar"), "MZXW6YTBOI======");
*
* assertEquals(
* decodeBase32("MZXW6YTBOI======"),
* new TextEncoder().encode("foobar")
* );
* ```
*
* @module
*/
const _common32_js_1 = require("./_common32.js");
const _common_detach_js_1 = require("./_common_detach.js");
const padding = "=".charCodeAt(0);
const alphabet = new TextEncoder()
.encode("ABCDEFGHIJKLMNOPQRSTUVWXYZ234567");
const rAlphabet = new Uint8Array(128).fill(32); //alphabet.length
alphabet.forEach((byte, i) => rAlphabet[byte] = i);
/**
* Converts data into a base32-encoded string.
*
* @see {@link https://www.rfc-editor.org/rfc/rfc4648.html#section-6}
*
* @param data The data to encode.
* @returns The base32-encoded string.
*
* @example Usage
* ```ts
* import { encodeBase32 } from "@std/encoding/base32";
* import { assertEquals } from "@std/assert";
*
* assertEquals(encodeBase32("6c60c0"), "GZRTMMDDGA======");
* ```
*/
function encodeBase32(data) {
if (typeof data === "string") {
data = new TextEncoder().encode(data);
}
else if (data instanceof ArrayBuffer)
data = new Uint8Array(data).slice();
else
data = data.slice();
const [output, i] = (0, _common_detach_js_1.detach)(data, (0, _common32_js_1.calcSizeBase32)(data.length));
(0, _common32_js_1.encode)(output, i, 0, alphabet, padding);
return new TextDecoder().decode(output);
}
/**
* Decodes a base32-encoded string.
*
* @see {@link https://www.rfc-editor.org/rfc/rfc4648.html#section-6}
*
* @param b32 The base32-encoded string to decode.
* @returns The decoded data.
*
* @example Usage
* ```ts
* import { decodeBase32 } from "@std/encoding/base32";
* import { assertEquals } from "@std/assert";
*
* assertEquals(
* decodeBase32("GZRTMMDDGA======"),
* new TextEncoder().encode("6c60c0"),
* );
* ```
*/
function decodeBase32(b32) {
const output = new TextEncoder().encode(b32);
if (output.length % 8) {
throw new TypeError(`Invalid base32 string: length (${output.length}) must be a multiple of 8`);
}
// deno-lint-ignore no-explicit-any
return new Uint8Array(output.buffer
.transfer((0, _common32_js_1.decode)(output, 0, 0, rAlphabet, padding)));
}