import { Command as $Command } from "@smithy/core/client";
import type { MetadataBearer as __MetadataBearer } from "@smithy/types";
import type { SendTaskHeartbeatInput, SendTaskHeartbeatOutput } from "../models/models_0";
import type { ServiceInputTypes, ServiceOutputTypes, SFNClientResolvedConfig } from "../SFNClient";
/**
 * @public
 */
export type { __MetadataBearer };
export { $Command };
/**
 * @public
 *
 * The input for {@link SendTaskHeartbeatCommand}.
 */
export interface SendTaskHeartbeatCommandInput extends SendTaskHeartbeatInput {
}
/**
 * @public
 *
 * The output of {@link SendTaskHeartbeatCommand}.
 */
export interface SendTaskHeartbeatCommandOutput extends SendTaskHeartbeatOutput, __MetadataBearer {
}
declare const SendTaskHeartbeatCommand_base: {
    new (input: SendTaskHeartbeatCommandInput): import("@smithy/core/client").CommandImpl<SendTaskHeartbeatCommandInput, SendTaskHeartbeatCommandOutput, SFNClientResolvedConfig, ServiceInputTypes, ServiceOutputTypes>;
    new (input: SendTaskHeartbeatCommandInput): import("@smithy/core/client").CommandImpl<SendTaskHeartbeatCommandInput, SendTaskHeartbeatCommandOutput, SFNClientResolvedConfig, ServiceInputTypes, ServiceOutputTypes>;
    getEndpointParameterInstructions(): {
        [x: string]: unknown;
    };
};
/**
 * <p>Used by activity workers and Task states using the <a href="https://docs.aws.amazon.com/step-functions/latest/dg/connect-to-resource.html#connect-wait-token">callback</a>
 *       pattern, and optionally Task states using the <a href="https://docs.aws.amazon.com/step-functions/latest/dg/connect-to-resource.html#connect-sync">job run</a> pattern to report to Step Functions that the task represented by the specified
 *         <code>taskToken</code> is still making progress. This action resets the
 *         <code>Heartbeat</code> clock. The <code>Heartbeat</code> threshold is specified in the state
 *       machine's Amazon States Language definition (<code>HeartbeatSeconds</code>). This action does not in itself
 *       create an event in the execution history. However, if the task times out, the execution
 *       history contains an <code>ActivityTimedOut</code> entry for activities, or a
 *         <code>TaskTimedOut</code> entry for tasks using the <a href="https://docs.aws.amazon.com/step-functions/latest/dg/connect-to-resource.html#connect-sync">job run</a> or
 *         <a href="https://docs.aws.amazon.com/step-functions/latest/dg/connect-to-resource.html#connect-wait-token">callback</a>
 *       pattern.</p>
 *          <note>
 *             <p>The <code>Timeout</code> of a task, defined in the state machine's Amazon States Language definition, is
 *         its maximum allowed duration, regardless of the number of <a>SendTaskHeartbeat</a> requests received. Use <code>HeartbeatSeconds</code> to configure the timeout interval
 *         for heartbeats.</p>
 *          </note>
 * @example
 * Use a bare-bones client and the command you need to make an API call.
 * ```javascript
 * import { SFNClient, SendTaskHeartbeatCommand } from "@aws-sdk/client-sfn"; // ES Modules import
 * // const { SFNClient, SendTaskHeartbeatCommand } = require("@aws-sdk/client-sfn"); // CommonJS import
 * // import type { SFNClientConfig } from "@aws-sdk/client-sfn";
 * const config = {}; // type is SFNClientConfig
 * const client = new SFNClient(config);
 * const input = { // SendTaskHeartbeatInput
 *   taskToken: "STRING_VALUE", // required
 * };
 * const command = new SendTaskHeartbeatCommand(input);
 * const response = await client.send(command);
 * // {};
 *
 * ```
 *
 * @param SendTaskHeartbeatCommandInput - {@link SendTaskHeartbeatCommandInput}
 * @returns {@link SendTaskHeartbeatCommandOutput}
 * @see {@link SendTaskHeartbeatCommandInput} for command's `input` shape.
 * @see {@link SendTaskHeartbeatCommandOutput} for command's `response` shape.
 * @see {@link SFNClientResolvedConfig | config} for SFNClient's `config` shape.
 *
 * @throws {@link InvalidToken} (client fault)
 *  <p>The provided token is not valid.</p>
 *
 * @throws {@link TaskDoesNotExist} (client fault)
 *  <p>The activity does not exist.</p>
 *
 * @throws {@link TaskTimedOut} (client fault)
 *  <p>The task token has either expired or the task associated with the token has already been closed.</p>
 *
 * @throws {@link SFNServiceException}
 * <p>Base exception class for all service exceptions from SFN service.</p>
 *
 *
 * @public
 */
export declare class SendTaskHeartbeatCommand extends SendTaskHeartbeatCommand_base {
    /** @internal type navigation helper, not in runtime. */
    protected static __types: {
        api: {
            input: SendTaskHeartbeatInput;
            output: {};
        };
        sdk: {
            input: SendTaskHeartbeatCommandInput;
            output: SendTaskHeartbeatCommandOutput;
        };
    };
}