export interface OtpEmailContext {
    ip?: string | null;
    userAgent?: string | null;
}
export declare function buildOtpDigitBoxes(otp: string): string;
export declare function parseClientFromUserAgent(userAgent?: string | null): {
    browser: string;
    os: string;
};
export declare function formatOtpRequestDate(date?: Date): string;
export declare function maskIpAddress(ip?: string | null): string;
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