import { type Express, type Request as ExpressRequest } from 'express';
import { createBetterAuthConfig } from '../../config/index.js';
import { PkceFlowOrchestrator } from '../auth/pkce-flow-orchestrator.js';
/**
 * Proxies Better Auth requests and completes social login flow.
 */
export declare class BetterAuthProxyHandler {
    private readonly auth;
    private readonly pkceFlowOrchestrator;
    private static readonly BETTER_AUTH_ERROR_PATH;
    private static readonly CUSTOM_AUTH_ERROR_PATH;
    private readonly logger;
    constructor(auth: Awaited<ReturnType<typeof createBetterAuthConfig>>, pkceFlowOrchestrator: PkceFlowOrchestrator);
    setupBetterAuthHandler(expressApp: Express): void;
    private tryRedirectToCustomErrorPage;
    private isBetterAuthErrorPath;
    private getSessionTokenFromResponse;
    private escapeRegex;
    private tryCompleteAuthFlow;
    private isJsonRequest;
    private resolveCallbackProviderId;
    convertExpressToFetchRequest(req: ExpressRequest): globalThis.Request;
}
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