import { secp256k1 } from '@noble/curves/secp256k1.js';
import BN from 'bn.js';
export { secp256k1 };
/** A point on the secp256k1 curve (noble-curves projective point). */
export type ECPoint = typeof secp256k1.Point.BASE;
/** Curve order n and field prime p, as native bigint values. */
export declare const CURVE_N: bigint;
export declare const CURVE_P: bigint;
export declare const G: import("@noble/curves/abstract/weierstrass").WeierstrassPoint<bigint>;
/** BN form of the curve order, for arithmetic that stays in bn.js. */
export declare const N_BN: BN;
export declare function bnToBigint(b: BN): bigint;
export declare function bigintToBn(x: bigint): BN;
/** Encode a coordinate (x or y) as a fixed-width 32-byte big-endian buffer. */
export declare function coordToBuffer(x: bigint): Buffer;
/**
 * Construct a curve point from an x coordinate plus the parity of y,
 * mirroring elliptic's curve.pointFromX. Throws when x is not on the curve.
 */
export declare function pointFromX(x: bigint, isYOdd: boolean): ECPoint;