Function checkMockFastModeRateLimit

src/services/mockRateLimits.ts:848–883

(
  isFastModeActive?: boolean,
)

}

export function checkMockFastModeRateLimit(
  isFastModeActive?: boolean,
): MockHeaders | null {
  if (mockFastModeRateLimitDurationMs === null) {
    return null
  }

  // Only throw when fast mode is active
  if (!isFastModeActive) {
    return null
  }

  // Check if the rate limit has expired
  if (
    mockFastModeRateLimitExpiresAt !== null &&
    Date.now() >= mockFastModeRateLimitExpiresAt
  ) {
    clearMockHeaders()
    return null
  }

  // Set expiry on first error (not when scenario is configured)
  if (mockFastModeRateLimitExpiresAt === null) {
    mockFastModeRateLimitExpiresAt =
      Date.now() + mockFastModeRateLimitDurationMs
  }

  // Compute dynamic retry-after based on remaining time
  const remainingMs = mockFastModeRateLimitExpiresAt - Date.now()
  const headersToSend = { ...mockHeaders }
  headersToSend['retry-after'] = String(
    Math.max(1, Math.ceil(remainingMs / 1000)),
  )

  return headersToSend
}