Function getRateLimitMessage

packages/core/src/utils/errorParsing.ts:59–101

(
  authType?: AuthType,
  error?: unknown,
  userTier?: UserTierId,
  currentModel?: string,
  fallbackModel?: string,
)

  `\nPossible quota limitations in place or slow response times detected. Switching to the ${fallbackModel} model for the rest of this session.`;

function getRateLimitMessage(
  authType?: AuthType,
  error?: unknown,
  userTier?: UserTierId,
  currentModel?: string,
  fallbackModel?: string,
): string {
  switch (authType) {
    case AuthType.LOGIN_WITH_GOOGLE: {
      // Determine if user is on a paid tier (Legacy or Standard) - default to FREE if not specified
      const isPaidTier =
        userTier === UserTierId.LEGACY || userTier === UserTierId.STANDARD;

      if (isProQuotaExceededError(error)) {
        return isPaidTier
          ? getRateLimitErrorMessageGoogleProQuotaPaid(
              currentModel || DEFAULT_PRIMARY_MODEL,
              fallbackModel,
            )
          : getRateLimitErrorMessageGoogleProQuotaFree(
              currentModel || DEFAULT_PRIMARY_MODEL,
              fallbackModel,
            );
      } else if (isGenericQuotaExceededError(error)) {
        return isPaidTier
          ? getRateLimitErrorMessageGoogleGenericQuotaPaid(
              currentModel || DEFAULT_PRIMARY_MODEL,
            )
          : getRateLimitErrorMessageGoogleGenericQuotaFree();
      } else {
        return isPaidTier
          ? getRateLimitErrorMessageGooglePaid(fallbackModel)
          : getRateLimitErrorMessageGoogleFree(fallbackModel);
      }
    }
    case AuthType.USE_GROK:
      return getRateLimitErrorMessageDefault(fallbackModel);
    case AuthType.USE_VERTEX_AI:
      return RATE_LIMIT_ERROR_MESSAGE_VERTEX;
    default:
      return getRateLimitErrorMessageDefault(fallbackModel);
  }
}

export function parseAndFormatApiError(
  error: unknown,