/// <reference types="node" />
import { EncodingType } from "../types";
/**
 * assert if string contains digits only
 * "123" // ok.  "12+2" // error.
 * @param val : string
 */
export declare function assertOnlyDigits(val: string, line: number): void;
/**
 * assert that a line has given number of words
 * @param val Comparsion result
 * @param expected expected result
 * @param line Line number in TEAL file
 */
export declare function assertLen(val: number, expected: number, line: number): void;
/**
 * Checks if string is base64
 * @param str : string that needs to be checked
 * @param line : line number in TEAL file
 */
export declare function assertBase64(str: string, line: number): void;
/**
 * Checks if string is base32
 * @param str : string that needs to be checked
 * @param line : line number in TEAL file
 */
export declare function assertBase32(str: string, line: number): void;
/**
 * returns key as bytes
 * @param key : key in a stateful key-value pair
 */
export declare function keyToBytes(key: Uint8Array | string): Uint8Array;
export declare function stringToBytes(s: string): Uint8Array;
export declare function convertToString(u: Uint8Array | Buffer): string;
/**
 * Description : converts string into buffer as per encoding type
 * @param s : string to be converted
 * @param encoding : encoding type
 */
export declare function convertToBuffer(s: string, encoding?: EncodingType): Buffer;
/**
 * Converts 64 bit unsigned integer to bytes in big endian.
 */
export declare function uint64ToBigEndian(x: number | bigint): Uint8Array;
/**
 * Takes an Algorand address in string form and decodes it into a Uint8Array (as public key)
 * @param addr : algorand address
 */
export declare function addressToPk(addr: string): Uint8Array;
/**
 * Parses appArgs to bytes if arguments passed to SSC are similar to goal ('int:1', 'str:hello'..)
 * https://developer.algorand.org/docs/features/asc1/stateful/#passing-arguments-to-stateful-smart-contracts
 * eg. "int:1" => new Uint8Aarray([0, 0, 0, 0, 0, 0, 0, 1])
 * NOTE: parseSSCAppArgs returns undefined to handle the case when application args passed to
 * stateful smart contract is undefined
 * @param appArgs : arguments to stateful smart contract
 */
export declare function parseSSCAppArgs(appArgs?: Array<Uint8Array | string>): Uint8Array[] | undefined;
/**
 * returns encodingtype (base32, base64, utf8, hex) and the encoded string from words list
 * eg. base64 "dfc/==" => returns [dfc/==, EncodingType.BASE64]
 *     0xadkjka => returns [adkjka, EncodingType.HEX] (removing 0x)
 *     "hello" => returns [hello, EncodingType.UTF8] (removing quotes "")
 * @param args : words list for base64 and base32
 * @param line line number
 */
export declare function getEncoding(args: string[], line: number): [string, EncodingType];