export interface CacheData {
    slot: number;
    isVyper: boolean;
    ts: number;
    expiresAt?: number;
}
export interface NegativeCacheData {
    negative: true;
    reason: NegativeLayoutReason;
    ts: number;
    expiresAt: number;
    maxSlots?: number;
}
export type CacheMapType = Map<string, CacheData | NegativeCacheData>;
export type StorageLayoutKind = "balance" | "approval";
export interface VerifiedStorageLayout {
    slot: number;
    isVyper: boolean;
    verifiedAt: number;
}
export type NegativeLayoutReason = "zero-allowance" | "no-balance" | "not-found";
export interface NegativeStorageLayout {
    status: "unverifiable";
    reason: NegativeLayoutReason;
    failedAt: number;
    expiresAt?: number;
    maxSlots?: number;
}
export type StoredStorageLayout = VerifiedStorageLayout | NegativeStorageLayout;
export interface StorageLayoutCacheAdapter {
    get(key: string): Promise<StoredStorageLayout | null | undefined>;
    set(key: string, value: StoredStorageLayout, ttlSeconds: number): Promise<void>;
}
export type StorageLayoutCacheEventType = "local_hit" | "external_hit" | "negative_hit" | "verified" | "discovery_failed" | "cache_error";
export interface StorageLayoutCacheEvent {
    type: StorageLayoutCacheEventType;
    kind: StorageLayoutKind;
    chainId: number;
    tokenAddress: string;
    reason?: NegativeLayoutReason;
}
export interface StorageLayoutCacheOptions {
    cache?: StorageLayoutCacheAdapter;
    chainId?: number;
    cacheTtlSeconds?: number;
    cacheTimeoutMs?: number;
    negativeCacheTtlSeconds?: number;
    onCacheEvent?: (event: StorageLayoutCacheEvent) => void | Promise<void>;
}
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