import { CloudFormationClient } from '@aws-sdk/client-cloudformation';
import { BackendOutput, BackendOutputRetrievalStrategy, MainStackNameResolver } from '@aws-amplify/plugin-types';
/**
 * Gets Amplify backend outputs from stack metadata and outputs
 */
export declare class StackMetadataBackendOutputRetrievalStrategy implements BackendOutputRetrievalStrategy {
    private readonly cfnClient;
    private readonly stackNameResolver;
    /**
     * Instantiate with a CloudFormationClient and a StackNameResolver
     */
    constructor(cfnClient: CloudFormationClient, stackNameResolver: MainStackNameResolver);
    /**
     * Resolves the stackName, then queries CFN for the stack metadata and outputs
     *
     * It combines the metadata and outputs to reconstruct the data object that was provided by the Amplify constructs when writing the output.
     * Except now the data contains the resolved values of the deployed resources rather than CFN references
     */
    fetchBackendOutput: () => Promise<BackendOutput>;
    /**
     * Filter out stack metadata entries that do not pertain to backend outputs
     */
    private filterBackendOutputEntryStackMetadata;
    /**
     * Type predicate to determine if stack metadata entry is like a backend output entry.
     * Zod parsing validation will handle stricter type checking
     */
    private isBackendOutputEntryStackMetadata;
}
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