export type RandomBytes = (length: number) => Uint8Array;
export type Parts = Record<string, Uint8Array>;
/**
 * Calculates f(partIdx) of the given points using Lagrangian interpolation.
 * @param  {Uint8Array} points The supplied point.
 * @param  {Number} partIdx The index to interpolate at.
 */
export declare function interpolate(points: Uint8Array[], partIdx?: number): number;
/**
 * Generates a random polynomal of the correct degree and sets x as the first coefficient.
 * @param  {(number) => Uint8Array} randomBytes Takes a length and returns a
 * Uint8Array of that length.
 * @param  {number} d The degree of the polynomial driven by the number shares and join threshold.
 * @param {number} x The point to hide.
 * @return {Uint8Array} The random polynomial with x as the fist coefficient.
 */
export declare function generate(randomBytes: RandomBytes, d: number, x: number): Uint8Array;
/**
 * Evaluates a polynomal at point x using Horner's method.
 * @param  {Uint8Array} p The polynomial
 * @return {Number} x The point to evaluate.
 */
export declare function evaluate(p: Uint8Array, x: number): number;