Magento – Magento 2 – how to set final price for product on view page

From my understanding, seem that you want to custom price on your shop. We should see some useful methods for customizing price.

vendor/magento/module-directory/Model/Currency.php

 public function formatPrecision(
        $price,
        $precision,
        $options = [],
        $includeContainer = true,
        $addBrackets = false
    ) {
       ......
    }

vendor/magento/module-directory/Model/PriceCurrency.php

 public function format(
            $amount,
            $includeContainer = true,
            $precision = self::DEFAULT_PRECISION,
            $scope = null,
            $currency = null
        ) {
            ......
        }

 public function convertAndRound($amount, $scope = null, $currency = null, $precision = self::DEFAULT_PRECISION)
 {
        ......
 }

vendor/magento/framework/Locale/Format.php

 public function getPriceFormat($localeCode = null, $currencyCode = null)
 {
   ......
 }

For sample di.xml:

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <type name="Magento\Directory\Model\Currency">
        <plugin name="modify_around_precision" type="Vendor\YourModule\Model\Directory\Plugin\Precision" />
    </type>
    <type name="Magento\Directory\Model\PriceCurrency">
        <plugin name="modify_around_format" type="Vendor\YourModule\Model\Directory\Plugin\Format" />
        <plugin name="modify_around_round" type="Vendor\YourModule\Model\Directory\Plugin\PriceRound" />
    </type>
    <type name="Magento\Framework\Locale\Format">
        <plugin name="modify_around_price_format" type="Vendor\YourModule\Model\Locale\Plugin\ModifyPriceFormat" />
    </type>
</config>