/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
/**
 * Interface for MCP OAuth tokens.
 */
export interface MCPOAuthToken {
    accessToken: string;
    refreshToken?: string;
    expiresAt?: number;
    tokenType: string;
    scope?: string;
}
/**
 * Interface for stored MCP OAuth credentials.
 */
export interface MCPOAuthCredentials {
    serverName: string;
    token: MCPOAuthToken;
    clientId?: string;
    tokenUrl?: string;
    mcpServerUrl?: string;
    updatedAt: number;
}
/**
 * Abstract base class for MCP OAuth token storage.
 * This provides a provider-agnostic interface for storing and retrieving
 * MCP OAuth tokens that can be used across different AI providers.
 */
export declare abstract class BaseTokenStore {
    /**
     * Load all stored MCP OAuth tokens.
     *
     * @returns A map of server names to credentials
     */
    abstract loadTokens(): Promise<Map<string, MCPOAuthCredentials>>;
    /**
     * Save a token for a specific MCP server.
     *
     * @param serverName The name of the MCP server
     * @param token The OAuth token to save
     * @param clientId Optional client ID used for this token
     * @param tokenUrl Optional token URL used for this token
     * @param mcpServerUrl Optional MCP server URL
     */
    abstract saveToken(serverName: string, token: MCPOAuthToken, clientId?: string, tokenUrl?: string, mcpServerUrl?: string): Promise<void>;
    /**
     * Get a token for a specific MCP server.
     *
     * @param serverName The name of the MCP server
     * @returns The stored credentials or null if not found
     */
    abstract getToken(serverName: string): Promise<MCPOAuthCredentials | null>;
    /**
     * Remove a token for a specific MCP server.
     *
     * @param serverName The name of the MCP server
     */
    abstract removeToken(serverName: string): Promise<void>;
    /**
     * Clear all stored MCP OAuth tokens.
     */
    abstract clearAllTokens(): Promise<void>;
    /**
     * Check if a token is expired.
     * This is a utility method that can be used by implementations.
     *
     * @param token The token to check
     * @returns True if the token is expired
     */
    static isTokenExpired(token: MCPOAuthToken): boolean;
    /**
     * Validate that a token has the required fields.
     *
     * @param token The token to validate
     * @throws Error if the token is invalid
     */
    protected validateToken(token: MCPOAuthToken): void;
    /**
     * Validate that server name is valid.
     *
     * @param serverName The server name to validate
     * @throws Error if the server name is invalid
     */
    protected validateServerName(serverName: string): void;
    /**
     * Create a credentials object from the provided parameters.
     *
     * @param serverName The name of the MCP server
     * @param token The OAuth token
     * @param clientId Optional client ID
     * @param tokenUrl Optional token URL
     * @param mcpServerUrl Optional MCP server URL
     * @returns The credentials object
     */
    protected createCredentials(serverName: string, token: MCPOAuthToken, clientId?: string, tokenUrl?: string, mcpServerUrl?: string): MCPOAuthCredentials;
}