setCheapestPriceRule example

$cheapestPriceRule = $product->getPriceRules()[0];
                $displayFromPrice = $product->displayFromPrice();
            } else {
                $cheapestPriceRule = $cheapestPriceData[$number]['price'];
                $displayFromPrice = $cheapestPriceData[$number]['different_price_count'] > 1;
            }

            if ($product->isPriceGroupActive()) {
                $cheapestPriceRule = $this->calculatePriceGroupDiscounts($product, $cheapestPriceRule, $context);
            }

            $product->setCheapestPriceRule($cheapestPriceRule);
            $this->priceCalculationService->calculateProduct($product, $context);

            $product->setListingPrice($product->getCheapestUnitPrice());
            if ($this->config->get('calculateCheapestPriceWithMinPurchase') && $product->getCheapestPrice() instanceof Price) {
                $product->setListingPrice($product->getCheapestPrice());
            }

            $product->setDisplayFromPrice($displayFromPrice);
        }
    }

    

$product->setMinStock($listProduct->getMinStock());
        $product->setReleaseDate($listProduct->getReleaseDate());
        $product->setShippingTime($listProduct->getShippingTime());
        $product->setShortDescription($listProduct->getShortDescription());
        $product->setStock($listProduct->getStock());
        $product->setWeight($listProduct->getWeight());
        $product->setWidth($listProduct->getWidth());
        $product->setPriceGroup($listProduct->getPriceGroup());
        $product->setCreatedAt($listProduct->getCreatedAt());
        $product->setUpdatedAt($listProduct->getUpdatedAt());
        $product->setPriceRules($listProduct->getPriceRules());
        $product->setCheapestPriceRule($listProduct->getCheapestPriceRule());
        $product->setManufacturerNumber($listProduct->getManufacturerNumber());
        $product->setMetaTitle($listProduct->getMetaTitle());
        $product->setTemplate($listProduct->getTemplate());
        $product->setHasConfigurator($listProduct->hasConfigurator());
        $product->setSales($listProduct->getSales());
        $product->setHasEsd($listProduct->hasEsd());
        $product->setEsd($listProduct->getEsd());
        $product->setIsPriceGroupActive($listProduct->isPriceGroupActive());
        $product->setBlockedCustomerGroupIds($listProduct->getBlockedCustomerGroupIds());
        $product->setVoteAverage($listProduct->getVoteAverage());
        $product->setHasAvailableVariant($listProduct->hasAvailableVariant());
        

$product = $products[$number];

            if (isset($covers[$number])) {
                $product->setCover($covers[$number]);
            }

            if (isset($graduatedPrices[$number])) {
                $product->setPriceRules($graduatedPrices[$number]);
            }

            if (isset($cheapestPrices[$number])) {
                $product->setCheapestPriceRule($cheapestPrices[$number]);
            }

            if (isset($voteAverages[$number])) {
                $product->setVoteAverage($voteAverages[$number]);
            }

            if (isset($categories[$number])) {
                $product->setCategories($categories[$number]);
            }

            if ($product->getManufacturer() && isset($manufacturerCovers[$product->getManufacturer()->getCoverId()])) {
                

$rules = $product->getPriceRules();

        $prices = [];
        foreach ($rules as $rule) {
            $prices[] = $this->calculatePriceStruct($rule, $tax, $context);
        }

        $product->setPrices($prices);

        $rules = $product->getPriceRules();
        if (!$product->getCheapestPriceRule() && !empty($rules)) {
            $product->setCheapestPriceRule(clone $rules[0]);
        }

        if ($product->getCheapestPriceRule()) {
            /** * Calculation with considering min purchase */
            $rule = clone $product->getCheapestPriceRule();
            $product->setCheapestPrice(
                $this->calculateCheapestAvailablePrice($product, $rule, $context)
            );

            

            $product->addAttributes(
                $this->parseAttributes($product->getAttributes())
            );

            $product->setCreatedAt(null);
            $product->setUpdatedAt(null);

            $product->setReleaseDate(null);
            $product->setPrices(null);
            $product->setPriceRules(null);
            $product->setCheapestPriceRule(null);
            $product->setCheapestPrice(null);
            $product->setCheapestUnitPrice(null);
            $product->setAvailableCombinations(null);
            $product->setFullConfiguration(null);
            $product->resetStates();

            if (!$this->isValid($shop, $product)) {
                continue;
            }
            $result[$number] = $product;
        }