/** * Decodes a multibase-encoded string. * * Throws an exception if the encoding isn't base64 or one of its variants. */export declare function multibaseBase64Decode(input: string): Uint8Array;/** * Decodes a base64-encoded string into bytes using the original alphabet from RFC4648. * * See <https://datatracker.ietf.org/doc/html/rfc4648#section-4>. */export declare function classicDecode(input: string): Uint8Array;/** * Decodes a base64-encoded string into bytes using the URL-safe alphabet. * * See <https://datatracker.ietf.org/doc/html/rfc4648#section-5>. */export declare function urlSafeDecode(input: string): Uint8Array;/** * Decodes a base64-encoded string into bytes using the given alphabet. */export declare function base64Decode(input: string, alphabet: Map<string, number>): Uint8Array;