import { authly } from "authly";
import { Payload } from "./Payload";
export declare class Signer {
    private readonly key?;
    constructor(key?: {
        public?: string;
        private?: string;
    } | undefined);
    sign(data: Payload.Creatable, duration?: number | "infinite"): Promise<string | undefined>;
    static open(key?: {
        public?: string;
        private?: string;
    }): Signer;
}
export declare namespace Signer {
    function create<T extends authly.Payload>(options: {
        key?: {
            public?: string;
            private?: string;
        };
        duration?: number;
    }): authly.Issuer<T> | undefined;
}