import type { CacheInterface } from './types/index.js';
export declare const createInMemoryCache: () => CacheInterface;
export declare const cacheClear: (cache: CacheInterface | null, epoch: number) => Promise<void>;
export declare const cacheFullKey: (namespace: string, key: string) => string;
export declare const cacheGet: (cache: CacheInterface | null, namespace: string, epoch: number, key: string) => Promise<unknown | null>;
export declare const cacheSet: (cache: CacheInterface | null, namespace: string, epoch: number, key: string, value: unknown) => Promise<void>;
export declare const cacheDelete: (cache: CacheInterface | null, namespace: string, epoch: number, key: string) => Promise<void>;
export declare const cacheGetTyped: <T>(cache: CacheInterface | null, namespace: string, epoch: number, key: string, guard: (v: unknown) => v is T) => Promise<T | null>;
export type CacheNamespaceAccessor = {
    get: (epoch: number, key: string) => Promise<unknown | null>;
    getTyped: <T>(epoch: number, key: string, guard: (v: unknown) => v is T) => Promise<T | null>;
    set: (epoch: number, key: string, value: unknown) => Promise<void>;
    delete: (epoch: number, key: string) => Promise<void>;
};
export declare const createCacheNamespace: (cache: CacheInterface | null, namespace: string) => CacheNamespaceAccessor;
export type CacheEpochTracker = {
    noteEpoch: (epoch: number) => Promise<void>;
    noteEpochs: (epochs: readonly number[]) => Promise<void>;
};
export declare const createCacheEpochTracker: (cache: CacheInterface | null, options: {
    maxSavedEpochs: number;
    persistentEpoch?: number;
}) => CacheEpochTracker;
export declare const pruneMap: <K, V>(map: Map<K, V>, maxEntries: number) => void;
export declare const buildSettlementStatusKey: (settlements: readonly {
    chainId: number;
    address: string;
}[]) => string;
export declare const buildSettlementKey: (settlement: {
    chainId: number;
    address: string;
}) => string;
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