import { type Invitation, type InvitationState, type ProofOfInvitation } from 'invitation/types.js';
import { type ValidationResult } from 'util/index.js';
export declare const invitationCanBeUsed: (invitation: InvitationState, timeOfUse: number) => ValidationResult;
export declare const validate: (proof: ProofOfInvitation, invitation: Invitation) => ValidationResult;
export declare const fail: (message: string, details?: any) => ValidationResult;
export declare class InvitationValidationError extends Error {
    constructor(message: string, details?: any);
    index?: number;
    details?: any;
}
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