/**
 * AWS IAM Authentication Provider
 *
 * Handles AWS authentication using IAM credentials.
 * Supports credential chains, environment variables, and profiles.
 */
import { AuthProvider, AuthResult, AWSIamConfig } from './index.js';
export declare class AWSIamProvider implements AuthProvider<AWSIamConfig> {
    readonly type: "aws_iam";
    authenticate(config: AWSIamConfig): Promise<AuthResult>;
    refresh(config: AWSIamConfig): Promise<AuthResult>;
    clear(config: AWSIamConfig): Promise<void>;
    validate(config: AWSIamConfig): Promise<boolean>;
    /**
     * Get AWS credentials from various sources
     */
    private getCredentials;
    /**
     * Get credentials from environment variables
     */
    private getFromEnv;
    /**
     * Get credentials from AWS profile file
     */
    private getFromProfile;
    /**
     * Get credentials from AWS SDK v3
     */
    private getFromSDK;
    /**
     * Get AMZ date format for AWS signing
     */
    private getAmzDate;
    private getCacheKey;
}