import type { CloudFormationValue } from "./common";
export declare const FN_BASE64 = "Fn::Base64";
export declare type Base64Key = typeof FN_BASE64;
export interface Base64 {
    'Fn::Base64': CloudFormationValue;
}
export declare const isBase64: import("@altostra/type-validations").ObjectOfTypeValidation<Base64>;
export declare function mkBase64(value: CloudFormationValue): Base64;