import type { NodeHttpHandlerOptions } from '@smithy/node-http-handler';
import { AwsCredentialIdentityProvider, Logger } from '@smithy/types';
import { ProxyAgent } from 'proxy-agent';
import type { SdkHttpOptions } from './sdk-provider';
/**
 * Behaviors to match AWS CLI
 *
 * See these links:
 *
 * https://docs.aws.amazon.com/cli/latest/topic/config-vars.html
 * https://docs.aws.amazon.com/cli/latest/userguide/cli-configure-envvars.html
 */
export declare class AwsCliCompatible {
    /**
     * Build an AWS CLI-compatible credential chain provider
     *
     * The credential chain returned by this function is always caching.
     */
    static credentialChainBuilder(options?: CredentialChainOptions): Promise<AwsCredentialIdentityProvider>;
    static requestHandlerBuilder(options?: SdkHttpOptions): NodeHttpHandlerOptions;
    static proxyAgent(options: SdkHttpOptions): ProxyAgent;
    /**
     * Attempts to get the region from a number of sources and falls back to us-east-1 if no region can be found,
     * as is done in the AWS CLI.
     *
     * The order of priority is the following:
     *
     * 1. Environment variables specifying region, with both an AWS prefix and AMAZON prefix
     *    to maintain backwards compatibility, and without `DEFAULT` in the name because
     *    Lambda and CodeBuild set the $AWS_REGION variable.
     * 2. Regions listed in the Shared Ini Files - First checking for the profile provided
     *    and then checking for the default profile.
     * 3. IMDS instance identity region from the Metadata Service.
     * 4. us-east-1
     */
    static region(maybeProfile?: string): Promise<string>;
}
export interface CredentialChainOptions {
    readonly profile?: string;
    readonly httpOptions?: SdkHttpOptions;
    readonly logger?: Logger;
}