adilallo
21 lines
568 B
TypeScript
21 lines
568 B
TypeScript
/**
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* In-memory rate limiter (per server instance). Sufficient for small deploys;
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* replace with Redis or edge limits if you scale horizontally.
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*/
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const windows = new Map<string, number>();
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export function rateLimitKey(
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key: string,
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minIntervalMs: number,
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): { ok: true } | { ok: false; retryAfterMs: number } {
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const now = Date.now();
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const last = windows.get(key) ?? 0;
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const elapsed = now - last;
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if (elapsed < minIntervalMs) {
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return { ok: false, retryAfterMs: minIntervalMs - elapsed };
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}
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windows.set(key, now);
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return { ok: true };
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}
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