export interface AzureTokenResponse {
    token_type: string;
    expires_in: number;
    ext_expires_in?: number;
    access_token: string;
}
interface Options {
    /**
     *
     * Whether to log debug messages & tokens during the token retrieval process.
     * Useful for troubleshooting and understanding the flow of operations.
     *
     * Use with Caution, this could leak secrets!
     */
    debugMode?: boolean;
    /**
     * Whether to skip any token caching and force fresh retrievals
     *
     */
    forceFreshAuth?: boolean;
    /**
     * Treat token as expired if it has less than this many seconds remaining.
     * Helps avoid clock skew / in-flight expiry. (Default 30 secs)
     */
    expirySkewSeconds?: number;
}
export declare class AwsOIDCAzureTokenClient {
    private readonly tenantId;
    private readonly clientId;
    private readonly tokenDurationSeconds;
    private readonly options;
    private static accessToken;
    private static readonly stsClient;
    /**
     * Create a new instance of the AwsToAzureFederatedCredentials class
     * @param tenantId - The Azure AD tenant ID
     * @param clientId - The Azure AD application (client) ID
     * @param tokenDurationSeconds - Duration for the AWS token (default: 300)
     * @param options - Credentials options
     */
    constructor(tenantId: string, clientId: string, tokenDurationSeconds?: number, options?: Options);
    /**
     * Returns an Azure AD access token for the configured application.
     *
     * Uses an in-memory cached token when it’s still valid; otherwise it obtains a fresh token
     * by exchanging an AWS OIDC web identity JWT against the Azure v2 token endpoint.
     *
     * @returns {Promise<string>} - The Azure access token
     */
    getAccessToken(): Promise<string>;
    /**
     * Fetch the AWS JWT and exchange it for an Azure token
     * @returns {Promise<AzureTokenResponse>} - The Azure token response
     * @internal
     */
    private fetchFederatedCredentials;
    /**
     * Check if the access token is expired
     * @returns {boolean} - Whether the access token is expired
     * @internal
     */
    private static isAccessTokenExpired;
}
export {};