interface Keygrip {
    sign(data: any): string;
    verify(data: any, digest: string): boolean;
    index(data: any, digest: string): number;
}

interface KeygripFunction {
    new(keys: readonly string[], algorithm?: string, encoding?: string): Keygrip;
    (keys: readonly string[], algorithm?: string, encoding?: string): Keygrip;
}

declare const Keygrip: KeygripFunction;

export = Keygrip;