Retrieve applied coupon code + discounted price via API

Hi there,

Is there any way to get the applied coupon code and total discounted amount via any API which applied in the checkout. I guess there is an abandoned checkout API however, I am not getting any data since the checkout just initiated.

https://monosnap.com/file/T2qmBzlqif2GpDcOQyp84uHwJA3Zmf