/**
 * Generate a UUIDv7 identifier
 * UUIDv7 provides time-ordered, sortable UUIDs for better database performance
 */
export declare function generateId(): string;
/**
 * Generate a short, unique key with prefix for external reference
 * Example: "sub_a1b2c3d4" for subscriptions, "plan_x9y8z7" for plans
 */
export declare function generateKey(prefix: string): string;
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