import { AwsCredentialIdentity, AwsCredentialIdentityProvider } from "@aws-sdk/types";
import { MapAuthHelper, SDKAuthHelper } from "./types";
/**
 * Creates a transformRequest function that signs Amazon Location Service URLs using SigV4.
 *
 * @param region AWS region used for signing.
 * @param getCredentials Function that returns the current credentials.
 */
export declare function createTransformRequest(region: string, getCredentials: () => AwsCredentialIdentity): (url: string, resourceType?: string) => {
    url: string;
};
/**
 * Sets up automatic credential refresh. Credentials are refreshed 1 minute before expiration, or every hour if no
 * expiration is provided.
 *
 * @param credentialProvider Function that fetches fresh credentials.
 * @returns A function that returns the current credentials after the initial fetch.
 */
export declare function setupCredentialRefresh(credentialProvider: AwsCredentialIdentityProvider): Promise<() => AwsCredentialIdentity>;
/**
 * Builds a complete MapAuthHelper & SDKAuthHelper from a credentials provider and region.
 *
 * @param credentialProvider Function that fetches AWS credentials.
 * @param region AWS region for signing and client config.
 */
export declare function buildAuthHelper(credentialProvider: AwsCredentialIdentityProvider, region: string): Promise<MapAuthHelper & SDKAuthHelper>;