import { Command as $Command } from "@smithy/smithy-client";
import type { MetadataBearer as __MetadataBearer } from "@smithy/types";
import type { ChimeSDKMessagingClientResolvedConfig, ServiceInputTypes, ServiceOutputTypes } from "../ChimeSDKMessagingClient";
import type { DescribeChannelRequest, DescribeChannelResponse } from "../models/models_0";
/**
 * @public
 */
export type { __MetadataBearer };
export { $Command };
/**
 * @public
 *
 * The input for {@link DescribeChannelCommand}.
 */
export interface DescribeChannelCommandInput extends DescribeChannelRequest {
}
/**
 * @public
 *
 * The output of {@link DescribeChannelCommand}.
 */
export interface DescribeChannelCommandOutput extends DescribeChannelResponse, __MetadataBearer {
}
declare const DescribeChannelCommand_base: {
    new (input: DescribeChannelCommandInput): import("@smithy/smithy-client").CommandImpl<DescribeChannelCommandInput, DescribeChannelCommandOutput, ChimeSDKMessagingClientResolvedConfig, ServiceInputTypes, ServiceOutputTypes>;
    new (input: DescribeChannelCommandInput): import("@smithy/smithy-client").CommandImpl<DescribeChannelCommandInput, DescribeChannelCommandOutput, ChimeSDKMessagingClientResolvedConfig, ServiceInputTypes, ServiceOutputTypes>;
    getEndpointParameterInstructions(): import("@smithy/middleware-endpoint").EndpointParameterInstructions;
};
/**
 * <p>Returns the full details of a channel in an Amazon Chime
 *          <code>AppInstance</code>.</p>
 *          <note>
 *             <p>The <code>x-amz-chime-bearer</code> request header is mandatory. Use the
 *             ARN of the <code>AppInstanceUser</code> or <code>AppInstanceBot</code> that makes the API call as the value in
 *             the header.</p>
 *          </note>
 * @example
 * Use a bare-bones client and the command you need to make an API call.
 * ```javascript
 * import { ChimeSDKMessagingClient, DescribeChannelCommand } from "@aws-sdk/client-chime-sdk-messaging"; // ES Modules import
 * // const { ChimeSDKMessagingClient, DescribeChannelCommand } = require("@aws-sdk/client-chime-sdk-messaging"); // CommonJS import
 * // import type { ChimeSDKMessagingClientConfig } from "@aws-sdk/client-chime-sdk-messaging";
 * const config = {}; // type is ChimeSDKMessagingClientConfig
 * const client = new ChimeSDKMessagingClient(config);
 * const input = { // DescribeChannelRequest
 *   ChannelArn: "STRING_VALUE", // required
 *   ChimeBearer: "STRING_VALUE", // required
 * };
 * const command = new DescribeChannelCommand(input);
 * const response = await client.send(command);
 * // { // DescribeChannelResponse
 * //   Channel: { // Channel
 * //     Name: "STRING_VALUE",
 * //     ChannelArn: "STRING_VALUE",
 * //     Mode: "UNRESTRICTED" || "RESTRICTED",
 * //     Privacy: "PUBLIC" || "PRIVATE",
 * //     Metadata: "STRING_VALUE",
 * //     CreatedBy: { // Identity
 * //       Arn: "STRING_VALUE",
 * //       Name: "STRING_VALUE",
 * //     },
 * //     CreatedTimestamp: new Date("TIMESTAMP"),
 * //     LastMessageTimestamp: new Date("TIMESTAMP"),
 * //     LastUpdatedTimestamp: new Date("TIMESTAMP"),
 * //     ChannelFlowArn: "STRING_VALUE",
 * //     ElasticChannelConfiguration: { // ElasticChannelConfiguration
 * //       MaximumSubChannels: Number("int"), // required
 * //       TargetMembershipsPerSubChannel: Number("int"), // required
 * //       MinimumMembershipPercentage: Number("int"), // required
 * //     },
 * //     ExpirationSettings: { // ExpirationSettings
 * //       ExpirationDays: Number("int"), // required
 * //       ExpirationCriterion: "CREATED_TIMESTAMP" || "LAST_MESSAGE_TIMESTAMP", // required
 * //     },
 * //   },
 * // };
 *
 * ```
 *
 * @param DescribeChannelCommandInput - {@link DescribeChannelCommandInput}
 * @returns {@link DescribeChannelCommandOutput}
 * @see {@link DescribeChannelCommandInput} for command's `input` shape.
 * @see {@link DescribeChannelCommandOutput} for command's `response` shape.
 * @see {@link ChimeSDKMessagingClientResolvedConfig | config} for ChimeSDKMessagingClient's `config` shape.
 *
 * @throws {@link BadRequestException} (client fault)
 *  <p>The input parameters don't match the service's restrictions.</p>
 *
 * @throws {@link ForbiddenException} (client fault)
 *  <p>The client is permanently forbidden from making the request.</p>
 *
 * @throws {@link ServiceFailureException} (server fault)
 *  <p>The service encountered an unexpected error.</p>
 *
 * @throws {@link ServiceUnavailableException} (server fault)
 *  <p>The service is currently unavailable.</p>
 *
 * @throws {@link ThrottledClientException} (client fault)
 *  <p>The client exceeded its request rate limit.</p>
 *
 * @throws {@link UnauthorizedClientException} (client fault)
 *  <p>The client is not currently authorized to make the request.</p>
 *
 * @throws {@link ChimeSDKMessagingServiceException}
 * <p>Base exception class for all service exceptions from ChimeSDKMessaging service.</p>
 *
 *
 * @public
 */
export declare class DescribeChannelCommand extends DescribeChannelCommand_base {
    /** @internal type navigation helper, not in runtime. */
    protected static __types: {
        api: {
            input: DescribeChannelRequest;
            output: DescribeChannelResponse;
        };
        sdk: {
            input: DescribeChannelCommandInput;
            output: DescribeChannelCommandOutput;
        };
    };
}