/**
 * @file esm-auth.types.ts
 * @description Authentication configuration for private npm registries and esm.sh CDN.
 */
/**
 * Authentication configuration for accessing private npm registries.
 * Used both for version resolution (npm registry API) and ESM bundle fetching.
 */
export interface EsmRegistryAuth {
    /**
     * Custom registry URL (e.g., 'https://npm.pkg.github.com').
     * If not provided, defaults to 'https://registry.npmjs.org'.
     */
    registryUrl?: string;
    /**
     * Bearer token for authentication.
     * Mutually exclusive with `tokenEnvVar`.
     */
    token?: string;
    /**
     * Environment variable name containing the bearer token.
     * Resolved at runtime for security (avoids storing tokens in config).
     * Mutually exclusive with `token`.
     */
    tokenEnvVar?: string;
}
/**
 * Zod schema for EsmRegistryAuth validation.
 */
export declare const esmRegistryAuthSchema: import("@frontmcp/lazy-zod").ZodObject<{
    registryUrl: import("@frontmcp/lazy-zod").ZodOptional<import("@frontmcp/lazy-zod").ZodString>;
    token: import("@frontmcp/lazy-zod").ZodOptional<import("@frontmcp/lazy-zod").ZodString>;
    tokenEnvVar: import("@frontmcp/lazy-zod").ZodOptional<import("@frontmcp/lazy-zod").ZodString>;
}, import("zod/v4/core").$strip>;
/**
 * Default npm registry URL.
 */
export declare const DEFAULT_NPM_REGISTRY = "https://registry.npmjs.org";
/**
 * Resolve the bearer token from an EsmRegistryAuth configuration.
 * Handles both direct tokens and environment variable references.
 *
 * @param auth - Registry auth configuration (optional)
 * @returns The resolved token, or undefined if no auth configured
 * @throws Error if tokenEnvVar is specified but the environment variable is not set
 */
export declare function resolveRegistryToken(auth?: EsmRegistryAuth): string | undefined;
/**
 * Get the registry URL from auth configuration, falling back to default.
 */
export declare function getRegistryUrl(auth?: EsmRegistryAuth): string;
//# sourceMappingURL=esm-auth.types.d.ts.map