import { hexstring, P2P } from '@shardeum-foundation/lib-types';
export declare let cycles: P2P.CycleCreatorTypes.CycleRecord[];
export declare let cyclesByMarker: {
    [marker: string]: P2P.CycleCreatorTypes.CycleRecord;
};
export declare let oldest: P2P.CycleCreatorTypes.CycleRecord;
export declare let newest: P2P.CycleCreatorTypes.CycleRecord;
/** FUNCTIONS */
export declare function init(): void;
export declare function reset(): void;
export declare function getNewest(): P2P.CycleCreatorTypes.CycleRecord;
export declare function append(cycle: P2P.CycleCreatorTypes.CycleRecord): void;
export declare function prepend(cycle: P2P.CycleCreatorTypes.CycleRecord): void;
export declare function validate(prev: P2P.CycleCreatorTypes.CycleRecord, next: P2P.CycleCreatorTypes.CycleRecord): boolean;
export declare function getCycleChain(start: any, end?: any): P2P.CycleCreatorTypes.CycleRecord[];
/**
 * Find a stored cycle with a timestamp.
 * This will fail if a timestamp is newer or older than cycles stored on this node
 * getCycleNumberFromTimestamp() will allow for predictions about future or past cycles.
 * @param timestamp
 */
export declare function getStoredCycleByTimestamp(timestamp: any): P2P.CycleCreatorTypes.CycleRecord;
/**
 * Get a cycle from a timestamp.
 * Future timestamps are allowed. Timestamps for cycles older than stored are allow if the allowOlder flag is set
 * @param timestamp timestamp of the TX.  NOTE by default the sync settle time will be added.  set addSyncSettleTime = false to avoid this
 * @param allowOlder this allows calculating a cycle number for a cycle that is not stored.
 * @param addSyncSettleTime add in the sync settle time to the request.
 */
export declare function getCycleNumberFromTimestamp(timestamp: number, allowOlder?: boolean, addSyncSettleTime?: boolean): number;
export declare function prune(keep: number): void;
/** HELPER FUNCTIONS */
export declare function computeCycleMarker(fields: any): string;
export declare function getDebug(): string;
/** Returns the last appended cycle's marker. */
export declare function getCurrentCycleMarker(): hexstring;
/**
 * this gets the most recently finished cycle and puts it in a logs str wth message and time
 * this cycle is never the most current one as we start working on the next as soon as we update
 * newest
 * @param msg
 * @returns
 */
export declare function getNewestCycleInfoLogStr(msg: string): string;