/** Register a freshly-issued nonce (called when the alert card is sent). */
export declare function registerOverloadNonce(nonce: string): void;
/**
 * Try to claim `nonce` for `action`. Returns true exactly once per (nonce,
 * action): the two buttons on one card each get one claim, so the owner can
 * click BOTH 清僵尸 and 挂起闲置 on the same alert, but neither twice. Unknown
 * or expired nonce → false (stale card).
 */
export declare function claimOverloadNonce(nonce: string, action: string): boolean;
export declare function _resetOverloadNoncesForTest(): void;
export declare function _overloadNonceCountForTest(): number;
/**
 * Undo a claim for `(nonce, action)` so the button can be retried. Called when
 * the action a claim guarded (the sweep) fails: without this a transient error
 * would permanently burn the button and force the owner to the CLI. No-op if
 * the nonce already expired/pruned.
 */
export declare function releaseOverloadNonce(nonce: string, action: string): void;
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