import { Command as $Command } from "@smithy/smithy-client";
import type { MetadataBearer as __MetadataBearer } from "@smithy/types";
import type { ECRClientResolvedConfig, ServiceInputTypes, ServiceOutputTypes } from "../ECRClient";
import type { GetDownloadUrlForLayerRequest, GetDownloadUrlForLayerResponse } from "../models/models_0";
/**
 * @public
 */
export type { __MetadataBearer };
export { $Command };
/**
 * @public
 *
 * The input for {@link GetDownloadUrlForLayerCommand}.
 */
export interface GetDownloadUrlForLayerCommandInput extends GetDownloadUrlForLayerRequest {
}
/**
 * @public
 *
 * The output of {@link GetDownloadUrlForLayerCommand}.
 */
export interface GetDownloadUrlForLayerCommandOutput extends GetDownloadUrlForLayerResponse, __MetadataBearer {
}
declare const GetDownloadUrlForLayerCommand_base: {
    new (input: GetDownloadUrlForLayerCommandInput): import("@smithy/smithy-client").CommandImpl<GetDownloadUrlForLayerCommandInput, GetDownloadUrlForLayerCommandOutput, ECRClientResolvedConfig, ServiceInputTypes, ServiceOutputTypes>;
    new (input: GetDownloadUrlForLayerCommandInput): import("@smithy/smithy-client").CommandImpl<GetDownloadUrlForLayerCommandInput, GetDownloadUrlForLayerCommandOutput, ECRClientResolvedConfig, ServiceInputTypes, ServiceOutputTypes>;
    getEndpointParameterInstructions(): import("@smithy/middleware-endpoint").EndpointParameterInstructions;
};
/**
 * <p>Retrieves the pre-signed Amazon S3 download URL corresponding to an image layer. You can
 *             only get URLs for image layers that are referenced in an image.</p>
 *          <p>When an image is pulled, the GetDownloadUrlForLayer API is called once per image layer
 *             that is not already cached.</p>
 *          <note>
 *             <p>This operation is used by the Amazon ECR proxy and is not generally used by
 *         customers for pulling and pushing images. In most cases, you should use the <code>docker</code> CLI to pull, tag, and push images.</p>
 *          </note>
 * @example
 * Use a bare-bones client and the command you need to make an API call.
 * ```javascript
 * import { ECRClient, GetDownloadUrlForLayerCommand } from "@aws-sdk/client-ecr"; // ES Modules import
 * // const { ECRClient, GetDownloadUrlForLayerCommand } = require("@aws-sdk/client-ecr"); // CommonJS import
 * // import type { ECRClientConfig } from "@aws-sdk/client-ecr";
 * const config = {}; // type is ECRClientConfig
 * const client = new ECRClient(config);
 * const input = { // GetDownloadUrlForLayerRequest
 *   registryId: "STRING_VALUE",
 *   repositoryName: "STRING_VALUE", // required
 *   layerDigest: "STRING_VALUE", // required
 * };
 * const command = new GetDownloadUrlForLayerCommand(input);
 * const response = await client.send(command);
 * // { // GetDownloadUrlForLayerResponse
 * //   downloadUrl: "STRING_VALUE",
 * //   layerDigest: "STRING_VALUE",
 * // };
 *
 * ```
 *
 * @param GetDownloadUrlForLayerCommandInput - {@link GetDownloadUrlForLayerCommandInput}
 * @returns {@link GetDownloadUrlForLayerCommandOutput}
 * @see {@link GetDownloadUrlForLayerCommandInput} for command's `input` shape.
 * @see {@link GetDownloadUrlForLayerCommandOutput} for command's `response` shape.
 * @see {@link ECRClientResolvedConfig | config} for ECRClient's `config` shape.
 *
 * @throws {@link InvalidParameterException} (client fault)
 *  <p>The specified parameter is invalid. Review the available parameters for the API
 *             request.</p>
 *
 * @throws {@link LayerInaccessibleException} (client fault)
 *  <p>The specified layer is not available because it is not associated with an image.
 *             Unassociated image layers may be cleaned up at any time.</p>
 *
 * @throws {@link LayersNotFoundException} (client fault)
 *  <p>The specified layers could not be found, or the specified layer is not valid for this
 *             repository.</p>
 *
 * @throws {@link RepositoryNotFoundException} (client fault)
 *  <p>The specified repository could not be found. Check the spelling of the specified
 *             repository and ensure that you are performing operations on the correct registry.</p>
 *
 * @throws {@link ServerException} (server fault)
 *  <p>These errors are usually caused by a server-side issue.</p>
 *
 * @throws {@link UnableToGetUpstreamLayerException} (client fault)
 *  <p>There was an issue getting the upstream layer matching the pull through cache
 *             rule.</p>
 *
 * @throws {@link ECRServiceException}
 * <p>Base exception class for all service exceptions from ECR service.</p>
 *
 *
 * @public
 */
export declare class GetDownloadUrlForLayerCommand extends GetDownloadUrlForLayerCommand_base {
    /** @internal type navigation helper, not in runtime. */
    protected static __types: {
        api: {
            input: GetDownloadUrlForLayerRequest;
            output: GetDownloadUrlForLayerResponse;
        };
        sdk: {
            input: GetDownloadUrlForLayerCommandInput;
            output: GetDownloadUrlForLayerCommandOutput;
        };
    };
}