/**
 * Validation utilities for user endpoint request bodies.
 *
 * Requirements: 9.1, 9.2, 9.3, 9.4
 */
export interface IValidationError {
    field: string;
    message: string;
}
export interface IValidationResult {
    valid: boolean;
    errors: IValidationError[];
}
/**
 * Validates a registration request body.
 * - username: non-empty, alphanumeric/hyphens/underscores only
 * - email: valid email format, not from a disallowed domain
 * - password: minimum 8 characters
 */
export declare function validateRegistration(body: unknown, disallowedEmailDomains?: string[]): IValidationResult;
/**
 * Validates a login request body.
 * - username: non-empty
 * - password: non-empty
 */
export declare function validateLogin(body: unknown): IValidationResult;
/**
 * Validates a password change request body.
 * - currentPassword: non-empty string
 * - newPassword: minimum 8 characters
 *
 * Requirements: 1.3, 5.7
 */
export declare function validatePasswordChange(body: unknown): IValidationResult;
/**
 * Validates a mnemonic recovery request body.
 * - email: valid email format
 * - mnemonic: non-empty string
 * - newPassword (optional): if present, minimum 8 characters
 *
 * Requirements: 5.7
 */
export declare function validateRecovery(body: unknown): IValidationResult;
//# sourceMappingURL=userValidation.d.ts.map