import React from "react";
export interface TotpDisplayProps {
    /** Base32-encoded TOTP secret. Empty string disables the display. */
    secret: string;
    /**
     * Pure function that computes the current TOTP code from `secret`.
     * Apps inject their own implementation so this widget stays decoupled
     * from the crypto module — e.g. vault wires
     * `@vault/shared/crypto/totp.computeTotpCode`.
     */
    computeCode: (secret: string) => string;
    /** TOTP step period in seconds. Defaults to 30. */
    period?: number;
    /** Optional callback fired after a successful clipboard write. */
    onCopy?: (code: string) => void;
}
/**
 * TOTP code display with a circular countdown ring. Recomputes the code
 * on each 30s window boundary; ticks the remaining-seconds value once
 * per second to drive the ring animation.
 */
export declare function TotpDisplay({ secret, computeCode, period, onCopy, }: TotpDisplayProps): React.JSX.Element | null;
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