/**
 * @class Env
 * @description This class is used to determine the environment variables
 * @param {Record<string, string>} envObj - The environment object from process.env
 */
declare class Env<T = unknown> {
    private value;
    private parsed;
    constructor(envObj?: Record<string, string>);
    get isProduction(): boolean;
    get isDevelopment(): boolean;
    get isStaging(): boolean;
    get isTest(): boolean;
    get(this: Env): T;
    key<K = string>(key: keyof typeof Env.prototype.value, factor: true): Env<K>;
    key<K = string>(key: keyof typeof Env.prototype.value, factor?: false): Env<K | undefined>;
    key<K = string>(key: keyof typeof Env.prototype.value, factor: K): Env<K>;
    private checkBoolean;
    bool(this: Env): Env<boolean>;
    email(this: Env): Env<string>;
    url(this: Env, options?: {
        ipv6?: boolean;
    }): Env<string>;
    private checkNumber;
    integer(this: Env): Env<number>;
    float(this: Env): Env<number>;
    unsigned(this: Env): Env<number>;
    signed(this: Env): Env<number>;
}

export { Env as default };