import { IClientResponse, IPending2WTxDetails, IResult } from '../interfaces';
type TypedArray = Int8Array | Uint8Array | Uint8ClampedArray | Int16Array | Uint16Array | Int32Array | Uint32Array | Float32Array | Float64Array;
/**
 * Cast `status` received from 2 Way network to lowercase string variant
 *
 * TODO: There's probably already a built-in function for this?
 *
 * @export
 * @param {('Success' | 'Error' | 'InProgress' | 'Unknown')} status
 * @return {*}  {('success' | 'error' | 'pending' | 'unknown')}
 */
export declare function castAPIStatus(status: 'Success' | 'Error' | 'InProgress' | 'Unknown'): 'success' | 'error' | 'pending' | 'unknown';
/**
 * Converts a string into a byte array for handling by nacl
 *
 * @param msg {string}
 * @returns
 */
export declare function getStringBytes(msg: string): Uint8Array;
/**
 * Converts a HEX string into a byte array
 *
 * @returns
 * @param hexString - HEX string to obtain byte array from
 */
export declare function getHexStringBytes(hexString: string): Uint8Array;
/**
 * Converts a sequence of bytes into a HEX string
 *
 * @param bytes {Uint8Array}
 * @returns
 */
export declare function getBytesHexString(bytes: Uint8Array): string;
/**
 * Formats a token balance for display
 *
 * @param balance {number}
 * @param fraction - Optional fraction to divide the balance by
 * @returns
 */
export declare function formatBalance(balance: number, fraction?: number): string;
/**
 * Converts a byte array into a utf-8 string
 *
 * @param bytes {Uint8Array}
 * @returns
 */
export declare function getBytesString(bytes: Uint8Array): string;
/**
 * Truncates string to a specified number of bytes
 *
 * @param chars {string}
 * @param n {number}
 * @returns
 */
export declare function truncateByBytesUTF8(chars: string, n: number): string;
export declare function typedArrayToBuffer(array: Uint8Array): ArrayBuffer;
/**
 * Concatenates two typed arrays, as long as they are of the same type
 *
 * @param a {Uint8Array}
 * @param b {Uint8Array}
 * @returns
 */
export declare function concatTypedArrays<T extends TypedArray>(a: T, b: T): T;
/**
 * Filter out `value` from `IResult` containing possible errors,
 * if an error occurs, throw an exception
 *
 * @export
 * @template T
 * @return {*}
 * @param result - Result wrapper
 */
export declare function throwIfErr<T>(result: IResult<T>): T;
/**
 * Throws an error if there's a client API-level error.
 *
 *
 * @export
 * @param {IClientResponse} result
 * @return {*}  {IClientResponse}
 */
export declare function throwIfIClientError(result: IClientResponse): IClientResponse;
/**
 * Calculate the nonce value required to provide valid PoW
 * for a specified ID (challenge) and target (difficulty)
 *
 * @export
 * @param {number} target
 * @param {string} id
 * @return {*}  {number}
 */
export declare function calculateNonceForId(target: number, id: string): number;
/**
 * Create a unique ID as well as the required nonce for PoW
 *
 * @export
 * @param {number} [difficulty]
 * @return {*}  {{
 *     headers: { 'x-cache-id': string; 'x-nonce': number };
 * }}
 */
export declare function createIdAndNonceHeaders(difficulty?: number): {
    headers: {
        'x-cache-id': string;
        'x-nonce': number;
    };
};
/**
 * Generate a unique ID
 *
 * @export
 * @return {*}  {string}
 */
export declare const getUniqueID: () => string;
/**
 * Adds sensible defaults to asset structures for receiving and sending in 2 way transactions. Ensures
 * error handling for missing fields.
 *
 * @param {IPending2WTxDetails} txStructure
 * @return {*}  {IResult<IPending2WTxDetails>}
 */
export declare const formatAssetStructures: (txStructure: IPending2WTxDetails) => IResult<IPending2WTxDetails>;
export {};