export interface ApiKeyData {
    id: number;
    apiKey: string;
    userId: string;
    name?: string;
    description?: string;
    createdAt: number;
    updatedAt: number;
    lastUsedAt?: number;
    isActive: boolean;
    rateLimitRpm?: number;
    rateLimitTpm?: number;
    usageCount: number;
    billingTier?: string;
    balanceTokens?: number;
    monthlyQuotaTokens?: number;
    metadata?: string;
}
export interface ProviderKeyData {
    id: number;
    apiKeyId: number;
    provider: string;
    encryptedKey: string;
    isActive: boolean;
    createdAt: number;
    updatedAt: number;
}
export interface CreateApiKeyRequest {
    userId: string;
    name?: string;
    description?: string;
    providerKeys?: Record<string, string>;
    rateLimitRpm?: number;
    rateLimitTpm?: number;
    metadata?: Record<string, any>;
}
export interface UsageLog {
    apiKeyId: number;
    provider: string;
    model: string;
    promptTokens?: number;
    completionTokens?: number;
    totalTokens?: number;
    latencyMs?: number;
    success: boolean;
    errorMessage?: string;
}
export declare class ApiKeyManager {
    private db;
    private encryptionKey;
    constructor(db: D1Database, encryptionKey: string);
    generateApiKey(): string;
    isValidApiKeyFormat(apiKey: string): boolean;
    createApiKey(request: CreateApiKeyRequest): Promise<ApiKeyData>;
    getApiKey(apiKey: string): Promise<ApiKeyData | null>;
    getApiKeyById(id: number): Promise<ApiKeyData | null>;
    getApiKeysByUser(userId: string): Promise<ApiKeyData[]>;
    updateLastUsed(apiKey: string): Promise<void>;
    revokeApiKey(apiKey: string, userId: string): Promise<boolean>;
    deleteApiKey(apiKey: string, userId: string): Promise<boolean>;
    addProviderKey(apiKeyId: number, provider: string, providerApiKey: string): Promise<void>;
    getProviderKeys(apiKey: string): Promise<Record<string, string>>;
    removeProviderKey(apiKey: string, provider: string, userId: string): Promise<boolean>;
    logUsage(log: UsageLog): Promise<void>;
    getUsageStats(apiKey: string, startTime?: number, endTime?: number): Promise<any>;
    private encryptKey;
    private decryptKey;
    private mapApiKeyResult;
}