Connection of payment system on Yii2 project

There is a small project on Yii2
We have found a payment solution and want to implement it to us.

Deposit
The essence is simple: an iframe is inserted
When replenishing the account, we receive a POST-request with information about the deposit. This POST request needs to be processed.

Inference
You should also implement withdrawals. The user orders a payout. We send the information to the payment system.

Please write only to those who are currently free and ready to start work immediately.