ANTOOZA-BACKEND/Application/Abstractions/RateLimit/IRateLimiter.cs

namespace Application.Abstractions.RateLimit;

/// <summary>
/// Sliding window rate limiter abstraction (구현은 Redis).
/// </summary>
public interface IRateLimiter
{
    Task<RateLimitResult> CheckAsync(string key, int limit, TimeSpan window, CancellationToken ct = default);
}

public sealed record RateLimitResult(bool Allowed, int Limit, int Remaining, DateTime ResetAt);