$ composer require mkurc1/wallet-bundle

<?php
// app/AppKernel.php

public function registerBundles()
{
    $bundles = array(
        // ...
        new WalletBundle\WalletBundle(),
        // ...
    );
}

<?php

namespace AppBundle\Entity;

use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\ORM\Mapping as ORM;
use WalletBundle\Entity\Wallet as BaseWallet;

/**
 * @ORM\Entity
 * @ORM\Table(name="wallet")
 */
class Wallet extends BaseWallet
{
    /**
     * @var integer
     *
     * @ORM\Id
     * @ORM\Column(type="integer")
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    protected $id;
    
    /**
     * @var ArrayCollection
     *
     * @ORM\OneToMany(targetEntity="AppBundle\Entity\WalletHistory", mappedBy="wallet", cascade={"persist"}, orphanRemoval=true)
     * @ORM\OrderBy({"createdAt"="DESC"})
     */
    protected $histories;

    public function __construct()
    {
        parent::__construct();
        // your own logic
    }
}

<?php

namespace AppBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use WalletBundle\Entity\WalletInterface;
use WalletBundle\Entity\WalletHistory as BaseWalletHistory;

/**
 * @ORM\Entity
 * @ORM\Table(name="wallet_history")
 */
class WalletHistory extends BaseWalletHistory
{
    /**
     * @var integer
     *
     * @ORM\Id
     * @ORM\Column(type="integer")
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    protected $id;
    
    /**
     * @var WalletInterface
     *
     * @ORM\ManyToOne(targetEntity="AppBundle\Entity\Wallet", inversedBy="histories")
     * @ORM\JoinColumn(nullable=false)
     */
    protected $wallet;
    
    public function __construct($type = null)
    {
        parent::__construct($type);
        // your own logic
    }
}

<?php

namespace AppBundle\Entity;

use WalletBundle\Entity\WalletInterface;
use WalletBundle\Entity\UserWalletInterface;

class User implement UserWalletInterface
{
    // your user entity logic
    
    /**
     * @var WalletInterface
     *
     * @ORM\OneToOne(targetEntity="AppBundle\Entity\Wallet", cascade={"persist"})
     */
    protected $wallet;
    
    /**
     * @return WalletInterface
     */
    public function getWallet()
    {
        return $this->wallet;
    }

    /**
     * @param WalletInterface $wallet
     * @return User
     */
    public function setWallet($wallet)
    {
        $this->wallet = $wallet;
        return $this;
    }
    
    public function __construct()
    {
        parent::__construct($type);
        $this->wallet = new Wallet();
        // your own logic
    }
}

# app/config/config.yml
wallet:
    classes:
        wallet: AppBundle\Entity\Wallet # your wallet class
        wallet_history: AppBundle\Entity\WalletHistory # your wallet history class

$ php app/console doctrine:schema:update --force

<?php

$entityManager = $this->container->get('doctrine.orm.entity_manager');
$userRepository = $entityManager->getRepository('AppBundle:User');
$transaction = $this->container->get('wallet.transaction');

// add money to user account
$user = $userRepository->findOneByName('foo');
$amount = 199;
$transactionName = 'Bonus for your activity'
$transaction->addMoney($user, $amount, $transactionName);

// subtract money from user account
$user = $userRepository->findOneByName('foo');
$amount = 400;
$transactionName = 'Payment for subscription'
$transaction->subMoney($user, $amount, $transactionName);
// if account don't have enough money, method throw exception WalletBundle\Exception\NotEnoughMoneyException

// freeze money on user account (account don't need to have enough money to freeze it)
$user = $userRepository->findOneByName('foo');
$amount = 50;
$transactionName = 'Reclamation'
$transaction->freezeMoney($user, $amount, $transactionName);

// move freeze money to another user account
$fromUser = $userRepository->findOneByName('foo');
$toUser = $userRepository->findOneByName('bar');
$amount = 50;
$transactionName = 'Refund'
$transaction->moveFreezeMoneyToUser($fromUser, $toUser, $amount, $transactionName);
// if account don't have enough freeze money in wallet, method throw exception WalletBundle\Exception\NotEnoughMoneyException