import { Request } from 'express';
import { Strategy } from 'passport-strategy';
import { MinAuthProof } from '../common/proof.js';
import { Logger } from '../plugin/logger.js';
/**
 * A result of a proof verification.
 */
type VerificationResult = {
    __tag: 'success';
    output: unknown;
} | {
    __tag: 'failed';
    error: string;
};
export type AuthenticationResponse = {
    plugin: string;
    output: unknown;
};
export interface MinAuthStrategyConfig {
    logger: Logger;
    verifierUrl: string;
}
/**
 * Minauth's integration with passport.js.
 * This implementation uses the plugin server to verify the proof.
 */
declare class MinAuthStrategy extends Strategy {
    name: string;
    readonly verifyProof: (_: MinAuthProof) => Promise<VerificationResult>;
    readonly log: Logger;
    constructor(config: MinAuthStrategyConfig);
    authenticate(req: Request): Promise<void>;
}
export default MinAuthStrategy;