export interface NonceInfo {
    nonce: number;
    timestamp: number;
    apiKeyIndex: number;
}
export declare class NonceCache {
    private fetchNonceCallback;
    private cache;
    private batchSize;
    private maxCacheAge;
    private lastFetch;
    private fetchPromise;
    constructor(fetchNonceCallback: (apiKeyIndex: number, count: number) => Promise<number[]>);
    getNextNonce(apiKeyIndex: number): Promise<number>;
    getNextNonces(apiKeyIndex: number, count: number): Promise<number[]>;
    refreshNonces(apiKeyIndex: number): Promise<void>;
    private doRefreshNonces;
    private isCacheExpired;
    preWarmCache(apiKeyIndices: number[]): Promise<void>;
    clearCache(apiKeyIndex: number): void;
    clearAllCache(): void;
    getCacheStats(): Record<number, {
        count: number;
        oldest: number;
        newest: number;
    }>;
    isHealthy(): boolean;
    /**
     * Acknowledge failure and rollback nonce
     */
    acknowledgeFailure(apiKeyIndex: number): void;
    /**
     * Hard refresh nonce from API (used when invalid nonce error occurs)
     */
    hardRefreshNonce(apiKeyIndex: number): Promise<void>;
}
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