import type { MetadataBearer as __MetadataBearer } from "@smithy/types";
import type { GetRetainedMessageRequest, GetRetainedMessageResponse } from "../models/models_0";
/**
 * @public
 */
export type { __MetadataBearer };
/**
 * @public
 *
 * The input for {@link GetRetainedMessageCommand}.
 */
export interface GetRetainedMessageCommandInput extends GetRetainedMessageRequest {
}
/**
 * @public
 *
 * The output of {@link GetRetainedMessageCommand}.
 */
export interface GetRetainedMessageCommandOutput extends GetRetainedMessageResponse, __MetadataBearer {
}
declare const GetRetainedMessageCommand_base: {
    new (input: GetRetainedMessageCommandInput): import("@smithy/core/client").CommandImpl<GetRetainedMessageCommandInput, GetRetainedMessageCommandOutput, import("..").IoTDataPlaneClientResolvedConfig, import("..").ServiceInputTypes, import("..").ServiceOutputTypes>;
    new (input: GetRetainedMessageCommandInput): import("@smithy/core/client").CommandImpl<GetRetainedMessageCommandInput, GetRetainedMessageCommandOutput, import("..").IoTDataPlaneClientResolvedConfig, import("..").ServiceInputTypes, import("..").ServiceOutputTypes>;
    getEndpointParameterInstructions(): import("@smithy/types").EndpointParameterInstructions;
};
/**
 * <p>Gets the details of a single retained message for the specified topic.</p>
 *          <p>This action returns the message payload of the retained message, which can
 *       incur messaging costs. To list only the topic names of the retained messages, call
 *       <a href="https://docs.aws.amazon.com/iot/latest/apireference/API_iotdata_ListRetainedMessages.html">ListRetainedMessages</a>.</p>
 *          <p>Requires permission to access the <a href="https://docs.aws.amazon.com/service-authorization/latest/reference/list_awsiot.html">GetRetainedMessage</a> action.</p>
 *          <p>For more information about messaging costs, see <a href="http://aws.amazon.com/iot-core/pricing/#Messaging">Amazon Web Services IoT Core
 *       pricing - Messaging</a>.</p>
 * @example
 * Use a bare-bones client and the command you need to make an API call.
 * ```javascript
 * import { IoTDataPlaneClient, GetRetainedMessageCommand } from "@aws-sdk/client-iot-data-plane"; // ES Modules import
 * // const { IoTDataPlaneClient, GetRetainedMessageCommand } = require("@aws-sdk/client-iot-data-plane"); // CommonJS import
 * // import type { IoTDataPlaneClientConfig } from "@aws-sdk/client-iot-data-plane";
 * const config = {}; // type is IoTDataPlaneClientConfig
 * const client = new IoTDataPlaneClient(config);
 * const input = { // GetRetainedMessageRequest
 *   topic: "STRING_VALUE", // required
 * };
 * const command = new GetRetainedMessageCommand(input);
 * const response = await client.send(command);
 * // { // GetRetainedMessageResponse
 * //   topic: "STRING_VALUE",
 * //   payload: new Uint8Array(),
 * //   qos: Number("int"),
 * //   lastModifiedTime: Number("long"),
 * //   userProperties: new Uint8Array(),
 * // };
 *
 * ```
 *
 * @param GetRetainedMessageCommandInput - {@link GetRetainedMessageCommandInput}
 * @returns {@link GetRetainedMessageCommandOutput}
 * @see {@link GetRetainedMessageCommandInput} for command's `input` shape.
 * @see {@link GetRetainedMessageCommandOutput} for command's `response` shape.
 * @see {@link IoTDataPlaneClientResolvedConfig | config} for IoTDataPlaneClient's `config` shape.
 *
 * @throws {@link InternalFailureException} (server fault)
 *  <p>An unexpected error has occurred.</p>
 *
 * @throws {@link InvalidRequestException} (client fault)
 *  <p>The request is not valid.</p>
 *
 * @throws {@link MethodNotAllowedException} (client fault)
 *  <p>The specified combination of HTTP verb and URI is not supported.</p>
 *
 * @throws {@link ResourceNotFoundException} (client fault)
 *  <p>The specified resource does not exist.</p>
 *
 * @throws {@link ServiceUnavailableException} (server fault)
 *  <p>The service is temporarily unavailable.</p>
 *
 * @throws {@link ThrottlingException} (client fault)
 *  <p>The rate exceeds the limit.</p>
 *
 * @throws {@link UnauthorizedException} (client fault)
 *  <p>You are not authorized to perform this operation.</p>
 *
 * @throws {@link IoTDataPlaneServiceException}
 * <p>Base exception class for all service exceptions from IoTDataPlane service.</p>
 *
 *
 * @public
 */
export declare class GetRetainedMessageCommand extends GetRetainedMessageCommand_base {
    /** @internal type navigation helper, not in runtime. */
    protected static __types: {
        api: {
            input: GetRetainedMessageRequest;
            output: GetRetainedMessageResponse;
        };
        sdk: {
            input: GetRetainedMessageCommandInput;
            output: GetRetainedMessageCommandOutput;
        };
    };
}