# Swap WAVES ⇌ USDN
Waves.Exchange provides service for swapping WAVES to USDN or USDN to WAVES at any time. The swapping process and the exchange rate is regulated by the smart contract (opens new window). The service allows swapping any amount not less than 1 asset.
Important: WAVES to USDN swap transaction is instant (takes effect from the next block). USDN to WAVES swap transaction takes 1,440 blocks (about 24 hours) to complete. Swap transaction cannot be cancelled. You can have only one active swap transaction at a time.
You can access the swapping service from USDN staking (opens new window) page.
# Swap WAVES to USDN
On the Swap WAVES ⇌ USDN page open WAVES to USDN tab.
This tab allows to swap WAVES to USDN.
Note: If you need to buy more WAVES or USDN, click Buy with Card ( 
) next to the asset that you want to buy for quick access to the asset buying page and proceed with the payment method selection.
Enter the amount of WAVES that you want to swap to USDN in the I send field. In the I receive field the amount of USDN that you will receive will be displayed. The current exchange rate will be displayed below the fields.
Select the Transaction Fee Options checkbox to specify the asset that you want to use to pay the transaction fee.
Click Exchange to USDN via Smart Contract to continue.
# Swap USDN to WAVES
On the Swap WAVES ⇌ USDN page open USDN to WAVES tab.
This tab allows to exchange USDN to WAVES.
Note: If you need to buy more WAVES or USDN, click Buy with Card ( ) next to the asset that you want to buy for quick access to the asset buying page and proceed with the payment method selection.
Enter the amount of USDN that you want to swap to WAVES in the I send field. In the I receive field the amount of WAVES that you will receive will be displayed. The current exchange rate will be displayed below the fields.
Select the Transaction Fee Options checkbox to specify the asset that you want to use to pay the transaction fee.
Click Exchange to WAVES via Smart Contract to continue.
Note: While the USDN to WAVES swap transaction is in progress (1,440 blocks or about 24 hours) the Swap WAVES ⇌ USDN page will be inactive.
See more articles in the Asset Management chapter.
If you have difficulties with Waves.Exchange, please create a support (opens new window) ticket or write a question on our forum (opens new window).