import { BigNumberish, Uint256 } from "starknet";
import { ProjectivePoint, CipherBalance } from "./types.js";
export declare function bytesOrNumToBigInt(x: BigNumberish | Uint8Array): bigint;
export declare function isUint256(x: number | bigint | Uint256): x is Uint256;
export declare function castBigInt(x: number | bigint | Uint256): bigint;
export declare function createCipherBalance(y: ProjectivePoint, amount: bigint, random: bigint): CipherBalance;
/**
 * Decipher the given cipher balance with the given secret key.
 * This function has to bruteforce for `b` in `g^b`. It starts at `b = 0` and
 * ends in `b = 2^32`.
 * @param {bigint} x - The secret key
 * @param {ProjectivePoint} L - The left point of the cipher balance
 * @param {ProjectivePoint} R - The right point of the cipher balance
 * @returns {bigint} The deciphered balance
 * @throws {Error} If decryption fails
 * @todo Parametrize bit size
 */
export declare function decipherBalance(x: bigint, L: ProjectivePoint, R: ProjectivePoint): bigint;
/**
 * Asserts that the given CipherBalance is a correct encryption for the public
 * key of the given private key x and the given balance.
 * @param {bigint} x - The private key
 * @param {bigint} balance - The expected balance
 * @param {ProjectivePoint} L - The left point of the cipher balance
 * @param {ProjectivePoint} R - The right point of the cipher balance
 * @returns {boolean} True if the assertion passes, false otherwise
 */
export declare function assertBalance(x: bigint, balance: bigint, L: ProjectivePoint, R: ProjectivePoint): boolean;
export declare function pubKeyFromSecret(secret: bigint): import("./types.js").StarkPoint;