@metamask/snaps-utils/dist/base64.cjs

A collection of utilities for MetaMask Snaps

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.decodeBase64 = exports.encodeBase64 = void 0;
const utils_1 = require("@metamask/utils");
const bytes_1 = require("./bytes.cjs");
/**
 * Provides fast, asynchronous base64 encoding.
 *
 * @param input - The input value, assumed to be coercable to bytes.
 * @returns A base64 string.
 */
async function encodeBase64(input) {
    const bytes = (0, bytes_1.getBytes)(input);
    // In the browser, FileReader is much faster than bytesToBase64.
    if ('FileReader' in globalThis) {
        return await new Promise((resolve, reject) => {
            const reader = Object.assign(new FileReader(), {
                onload: () => resolve(reader.result.replace('data:application/octet-stream;base64,', '')),
                onerror: () => reject(reader.error),
            });
            reader.readAsDataURL(new File([bytes], '', { type: 'application/octet-stream' }));
        });
    }
    return (0, utils_1.bytesToBase64)(bytes);
}
exports.encodeBase64 = encodeBase64;
/**
 * Provides fast, asynchronous base64 decoding.
 *
 * @param base64 - A base64 string.
 * @returns A Uint8Array of bytes.
 */
async function decodeBase64(base64) {
    const response = await fetch(`data:application/octet-stream;base64,${base64}`);
    return new Uint8Array(await response.arrayBuffer());
}
exports.decodeBase64 = decodeBase64;
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