/**
 * Product/env defaults are set only on `new Ductape({ accessKey, product, env })`.
 */
export interface IRuntimeDefaults {
    default_product?: string;
    default_env?: string;
}
export interface IProductEnvFields {
    product?: string;
    env?: string;
}
export declare function mergeProductEnv<T extends IProductEnvFields>(options: T, defaults: IRuntimeDefaults, context?: IProductEnvFields | null): T & {
    product: string;
    env: string;
};
/** Resolves product/env from call payload, connection context, then constructor defaults. */
export declare class ProductEnvResolver {
    private readonly defaults;
    constructor(defaults?: IRuntimeDefaults);
    resolve<T extends IProductEnvFields>(options: T, context?: IProductEnvFields | null): T & {
        product: string;
        env: string;
    };
}
export declare function runtimeDefaultsFromConfig(config: {
    default_product?: string;
    default_env?: string;
}): IRuntimeDefaults;