export declare function b64ToUtf8(str: string): string;
export declare function base64ToArrayBuffer(str: string): ArrayBuffer;
/**Converted string to Base64, `isSafe` indicates URL safe */
export declare function utf8ToB64(str: string, isSafe?: boolean): string;
export declare function arrayBufferToBase64(arrayBuffer: ArrayBufferLike, isSafe?: boolean): string;
/**Must be async */
export declare function hash(strOrAb: string | ArrayBuffer, options?: 'string'): Promise<string>;
export declare function hash(strOrAb: string | ArrayBuffer, output: 'arrayBuffer'): Promise<ArrayBuffer>;
/**Simple hash, output int */
export declare function fnv1a(str: string): number;
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