declare module 'elliptic' {
    export interface BN {
        length: number;
        negative: number;
        words: Uint8Array;
        toString(format: string?): string;
    }

    export interface Point {
        x: BN;
        y: BN;
    }

    export interface KeyPair {
        getPrivate(): BN;
        getPublic(): Point;
        sign(message: Buffer, options: any): {
            r: BN,
            s: BN,
            recoveryParam: number
        };
    }

    export class ec {
        constructor(curveName: string);
        genKeyPair(): KeyPair;
        keyFromPrivate(priv: any, enc?: any): KeyPair;
        keyFromPublic(priv: any, enc: any): KeyPair;
    }
}