import type { MetadataBearer as __MetadataBearer } from "@smithy/types";
import type { StartEngagementRequest, StartEngagementResult } from "../models/models_0";
/**
 * @public
 */
export type { __MetadataBearer };
/**
 * @public
 *
 * The input for {@link StartEngagementCommand}.
 */
export interface StartEngagementCommandInput extends StartEngagementRequest {
}
/**
 * @public
 *
 * The output of {@link StartEngagementCommand}.
 */
export interface StartEngagementCommandOutput extends StartEngagementResult, __MetadataBearer {
}
declare const StartEngagementCommand_base: {
    new (input: StartEngagementCommandInput): import("@smithy/core/client").CommandImpl<StartEngagementCommandInput, StartEngagementCommandOutput, import("..").SSMContactsClientResolvedConfig, import("..").ServiceInputTypes, import("..").ServiceOutputTypes>;
    new (input: StartEngagementCommandInput): import("@smithy/core/client").CommandImpl<StartEngagementCommandInput, StartEngagementCommandOutput, import("..").SSMContactsClientResolvedConfig, import("..").ServiceInputTypes, import("..").ServiceOutputTypes>;
    getEndpointParameterInstructions(): import("@smithy/types").EndpointParameterInstructions;
};
/**
 * <p>Starts an engagement to a contact or escalation plan. The engagement engages each
 *          contact specified in the incident.</p>
 * @example
 * Use a bare-bones client and the command you need to make an API call.
 * ```javascript
 * import { SSMContactsClient, StartEngagementCommand } from "@aws-sdk/client-ssm-contacts"; // ES Modules import
 * // const { SSMContactsClient, StartEngagementCommand } = require("@aws-sdk/client-ssm-contacts"); // CommonJS import
 * // import type { SSMContactsClientConfig } from "@aws-sdk/client-ssm-contacts";
 * const config = {}; // type is SSMContactsClientConfig
 * const client = new SSMContactsClient(config);
 * const input = { // StartEngagementRequest
 *   ContactId: "STRING_VALUE", // required
 *   Sender: "STRING_VALUE", // required
 *   Subject: "STRING_VALUE", // required
 *   Content: "STRING_VALUE", // required
 *   PublicSubject: "STRING_VALUE",
 *   PublicContent: "STRING_VALUE",
 *   IncidentId: "STRING_VALUE",
 *   IdempotencyToken: "STRING_VALUE",
 * };
 * const command = new StartEngagementCommand(input);
 * const response = await client.send(command);
 * // { // StartEngagementResult
 * //   EngagementArn: "STRING_VALUE", // required
 * // };
 *
 * ```
 *
 * @param StartEngagementCommandInput - {@link StartEngagementCommandInput}
 * @returns {@link StartEngagementCommandOutput}
 * @see {@link StartEngagementCommandInput} for command's `input` shape.
 * @see {@link StartEngagementCommandOutput} for command's `response` shape.
 * @see {@link SSMContactsClientResolvedConfig | config} for SSMContactsClient's `config` shape.
 *
 * @throws {@link AccessDeniedException} (client fault)
 *  <p>You don't have sufficient access to perform this operation.</p>
 *
 * @throws {@link DataEncryptionException} (client fault)
 *  <p>The operation failed to due an encryption key error.</p>
 *
 * @throws {@link InternalServerException} (server fault)
 *  <p>Unexpected error occurred while processing the request.</p>
 *
 * @throws {@link ResourceNotFoundException} (client fault)
 *  <p>Request references a resource that doesn't exist.</p>
 *
 * @throws {@link ThrottlingException} (client fault)
 *  <p>The request was denied due to request throttling.</p>
 *
 * @throws {@link ValidationException} (client fault)
 *  <p>The input fails to satisfy the constraints specified by an Amazon Web Services
 *          service.</p>
 *
 * @throws {@link SSMContactsServiceException}
 * <p>Base exception class for all service exceptions from SSMContacts service.</p>
 *
 *
 * @public
 */
export declare class StartEngagementCommand extends StartEngagementCommand_base {
    /** @internal type navigation helper, not in runtime. */
    protected static __types: {
        api: {
            input: StartEngagementRequest;
            output: StartEngagementResult;
        };
        sdk: {
            input: StartEngagementCommandInput;
            output: StartEngagementCommandOutput;
        };
    };
}