export interface UlsApiKeyResolverConfig {
    /** ULS token endpoint URL (e.g. https://test.oauth.my.tomtom.com/token) */
    ulsTokenEndpoint: string;
    /** Client ID identifying this app to ULS */
    clientId: string;
    /** Target resource for the resolved API key */
    resource: string;
}
/**
 * Resolves a TomTom API key by exchanging a user's JWT via the ULS token exchange endpoint.
 *
 * Uses RFC 8693 Token Exchange:
 * - grant_type: urn:ietf:params:oauth:grant-type:token-exchange
 * - subject_token_type: urn:ietf:params:oauth:token-type:jwt
 * - requested_token_type: urn:tomtom:uls:params:oauth:token-type:api_key
 */
export declare class UlsApiKeyResolver {
    private readonly ulsTokenEndpoint;
    private readonly clientId;
    private readonly resource;
    constructor(config: UlsApiKeyResolverConfig);
    resolveApiKey(bearerToken: string): Promise<string | null>;
}