import { ErrorUnion, OkUnion } from '../outputs';
/**
 * Sets the result of a pre-checkout query; for bots only
 * @param {Object} params
 * @param {string} [params.preCheckoutQueryId] - Identifier of the pre-checkout query
 * @param {string} [params.errorMessage] - An error message, empty on success
 * @param {Object} state
 * @returns {OkUnion | ErrorUnion}
 */
export declare type AnswerPreCheckoutQueryMethod = <ResponseT = OkUnion>(params: AnswerPreCheckoutQueryParams, state?: Record<string, any>) => Promise<ResponseT | ErrorUnion>;
export interface AnswerPreCheckoutQueryParams {
    /** Identifier of the pre-checkout query */
    preCheckoutQueryId?: string;
    /** An error message, empty on success */
    errorMessage?: string;
}