/**
* Construct adds New Transaction to memory
*
* @param string $id is a long specifying a new transaction
* @param string $amount is a double specifying the amount{@from body}
* @param string $type is a string specifying a type of the transaction.{@from body}
* @param string $parent_id is an optional long that may specify the parent transaction of this transaction.{@from body}
*
*/
function __construct($id = null, $amount = null, $type = null, $parent_id = null)
{
$this->id = $id;
$this->amount = $amount;
$this->type = $type;
$this->parent_id = $parent_id;
$this->memory = new Memory('Transactions');
if ($this->id != null) {
$this->memory->save($id, $this);
}
}