import { ValidatorSpec, bool, cleanEnv, email, host, json, num, port, str, url } from "envalid";
/**
 * Validation types, default + custom
 */
export declare const envalidValidationTypes: {
    readonly str: typeof str;
    readonly email: typeof email;
    readonly json: typeof json;
    readonly bool: typeof bool;
    readonly host: typeof host;
    readonly num: typeof num;
    readonly port: typeof port;
    readonly url: typeof url;
    readonly base64String: (spec?: import("envalid").Spec<string> | undefined) => ValidatorSpec<string>;
    readonly base64Json: (spec?: import("envalid").Spec<any> | undefined) => ValidatorSpec<any>;
};
interface ICustomEnvValidators {
    base64JsonValidator: () => ValidatorSpec<any>;
    base64StringValidator: () => ValidatorSpec<any>;
}
/**
 * Custom validators
 */
export declare const customEnvValidators: ICustomEnvValidators;
/**
 * Validates and returns clean env
 *
 * Example:
 *
    ```
    import { str, json } from 'envalid'
    import {validateProjectEnvironment, customValidators} from './src/validators'

    validateProjectEnvironment(process.env, {
        FIREBASE_CREDENTIALS_BASE64: customValidators.base64JsonValidator(),
        TEST_STRING_ENV: str(),
        TEST_JSON_ENV: json()
    })

    ```
    Read more: https://www.npmjs.com/package/envalid
 */
export declare const validateProjectEnvironment: typeof cleanEnv;
export {};