import { CanActivate, ExecutionContext } from "@nestjs/common";
import { Reflector } from "@nestjs/core";
import { ClsService } from "nestjs-cls";
import { OAuthTokenService } from "../services/oauth.token.service";
/**
 * OAuth Token Guard
 *
 * Protects endpoints using OAuth2 Bearer tokens.
 * Validates the token and checks required scopes.
 *
 * Usage:
 * @UseGuards(OAuthTokenGuard)
 * @OAuthScopes('photographs:read')
 * async getPhotographs() { ... }
 */
export declare class OAuthTokenGuard implements CanActivate {
    private readonly tokenService;
    private readonly reflector;
    private readonly cls;
    constructor(tokenService: OAuthTokenService, reflector: Reflector, cls: ClsService);
    canActivate(context: ExecutionContext): Promise<boolean>;
    /**
     * Extracts the Bearer token from the Authorization header.
     */
    private extractToken;
    /**
     * Checks if the token's scopes include all required scopes.
     */
    private hasRequiredScopes;
}
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