/**
 * Convert the binary string to base64 string and sanitize it.
 *
 * @param val
 */
export declare function toBase64(val: string): string;
/**
 * Hex encode an array of bytes
 *
 * @param array the bytes
 * @returns the hex encoded string
 */
export declare function hexEncode(array: Uint8Array): string;
/**
 * Hex decode to an array of bytes
 *
 * @param hexString the hex encoded string
 * @returns the decoded array of bytes
 */
export declare function hexDecode(hexString: string): Uint8Array;
/**
 * Convert a u32 represented as a 4-bytes value in big endian to a u32 value
 *
 * @param bytes this a 4-bytes value representing an u32 in big endian
 * @returns the u32 value
 */
export declare function fromBeBytes(bytes: Uint8Array): number;
/**
 * Convert a u32 value to a u32 represented as a 4-bytes value in big endian
 *
 * @param myNumber a u32 value
 * @returns the u32 represented as a 4-bytes value in big endian
 */
export declare function toBeBytes(myNumber: number): Uint8Array;
/**
 * Deserialize Uint8Array as a list of Uint8Array
 *
 * @param serializedItems Uint8Array of serialized data
 * @returns an array of deserialized items
 */
export declare function deserializeList(serializedItems: Uint8Array): Uint8Array[];
/**
 * Deserialize Uint8Array as an array of objects with key and value
 *
 * @param serializedItems Uint8Array of serialized data
 * @returns an array of objects with key and value properties as Uint8Array
 */
export declare function deserializeHashMap(serializedItems: Uint8Array): Array<{
    uid: Uint8Array;
    value: Uint8Array;
}>;
/**
 * Serialize a list of Uint8Array as a Uint8Array
 *
 * @param list an array of deserialized item
 * @returns Uint8Array of serialized data
 */
export declare function serializeList(list: Uint8Array[]): Uint8Array;
/**
 * Serialize an array of uids and values as a Uint8Array
 *
 * @param data an array of objects containing uids and values
 * @returns Uint8Array of serialized data
 */
export declare function serializeHashMap(data: Array<{
    uid: Uint8Array;
    value: Uint8Array;
}>): Uint8Array;
/**
 * Remove accents and uppercase to query word
 *
 * @param str string to sanitize
 * @returns string initial string without accents and uppercase
 */
export declare function sanitizeString(str: string): string;
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