import { VerifyResponseOptions } from '../../interfaces/verify-response-decorator-options';
import { ScoreValidator } from '../../types';
import { RecaptchaVerificationResult } from '../../models/recaptcha-verification-result';
import { RecaptchaConfigRef } from '../../models/recaptcha-config-ref';
export declare abstract class AbstractGoogleRecaptchaValidator<Res> {
    protected readonly options: RecaptchaConfigRef;
    protected constructor(options: RecaptchaConfigRef);
    abstract validate(options: VerifyResponseOptions): Promise<RecaptchaVerificationResult<Res>>;
    protected isValidAction(action: string, options?: VerifyResponseOptions): boolean;
    protected isValidScore(score: number, validator?: ScoreValidator): boolean;
}