import { OAuth2Client, type Credentials, type OAuth2ClientOptions } from "google-auth-library";
export type GoogleOAuthTokens = {
    access_token: string;
    refresh_token?: string;
    expires_at?: number;
    token_type?: string;
    scope?: string;
};
type OAuthEndpoints = NonNullable<OAuth2ClientOptions["endpoints"]>;
export type GoogleOAuthFlowOptions = {
    clientId?: string;
    clientSecret?: string;
    endpoints?: OAuthEndpoints;
    openBrowser?: (url: string) => Promise<void>;
    timeoutMs?: number;
    callbackServer?: CallbackServer;
    exchangeCode?: (params: {
        client: OAuth2Client;
        code: string;
        codeVerifier: string;
        redirectUri: string;
    }) => Promise<Credentials>;
};
export declare const GOOGLE_OAUTH_CLIENT_ID = "677504568055-6vlq85ca3lulc17vmc9mlk1q4818e2d4.apps.googleusercontent.com";
export declare const GOOGLE_OAUTH_CLIENT_SECRET = "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";
export declare function runGoogleOAuthFlow(options?: GoogleOAuthFlowOptions): Promise<GoogleOAuthTokens>;
export declare function loadGoogleOAuthTokens(): GoogleOAuthTokens | null;
export declare function hasGoogleOAuthTokens(): boolean;
export declare function saveGoogleOAuthTokens(tokens: GoogleOAuthTokens): void;
export declare function createGoogleOAuthClient(tokens: GoogleOAuthTokens, onTokens?: (tokens: GoogleOAuthTokens) => void): OAuth2Client;
export declare function refreshGoogleOAuthCredentials(client: OAuth2Client, onTokens?: (tokens: GoogleOAuthTokens) => void): Promise<GoogleOAuthTokens>;
export declare class GoogleOAuthReauthRequiredError extends Error {
    readonly status = 401;
    constructor(message: string);
}
export type CallbackServer = {
    redirectUri: string;
    waitForCode: (expectedState: string) => Promise<{
        code: string;
    }>;
    close: () => Promise<void>;
};
export {};
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