# How to use USDD to pay for Tron network fees

### <mark style="color:blue;">How to use USDD to pay Tron network fees</mark>

1. Open **TokenPocket**, select the token you want to transfer, such as **USDD**, and click \[Transfer] at the bottom left of the token interface.

<figure><img src="https://2634619309-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F3qtItoZih7cEdFc6kPNk%2Fuploads%2F929YgwHkg6DME6rDgaKK%2F1%20%E6%8B%B7%E8%B4%9D.png?alt=media&#x26;token=61088895-33a2-41b1-a14e-acda6c867d34" alt=""><figcaption></figcaption></figure>

2. On the transfer interface, the default payment method is **TRX**. If using TRX for payment, make sure to enable the energy rental feature. Click \[Pay With] and choose **USDD** as the payment method. Currently, there is a limited-time subsidy, making the transfer fees very affordable.

<figure><img src="https://2634619309-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F3qtItoZih7cEdFc6kPNk%2Fuploads%2FE18NxvcmWXAgwfgh354G%2F2%20%E6%8B%B7%E8%B4%9D.png?alt=media&#x26;token=6baa3d66-9818-41e3-bc89-2b9039b9ce30" alt=""><figcaption></figcaption></figure>

3. After selecting the **USDD payment method**, you will see a detailed fee interface, which includes bandwidth and energy rental parameters. You can also opt to purchase **20 TRX**. Once confirmed, in the transaction details interface, you will see that the network fee has changed to **USDD**. Finally, click \[Confirm Payment] to execute the on-chain transaction.

<figure><img src="https://2634619309-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F3qtItoZih7cEdFc6kPNk%2Fuploads%2Fbnivh5vFAnnggGFVqs7D%2F3%20%E6%8B%B7%E8%B4%9D.png?alt=media&#x26;token=b7602c90-2607-405d-a949-50aee803a392" alt=""><figcaption></figcaption></figure>

<mark style="color:blue;">**The USDD network fee payment feature is supported in the latest iOS and Android versions (2.8.0 or above). If your app is not updated, it is recommended to upgrade to the latest version.**</mark>

### <mark style="color:blue;">USDT Lossless Exchange to USDD Tutorial</mark>

The TRON PSM protocol (Peg Stability Module) is a mechanism introduced by TRON DAO Reserve. It allows users to exchange USDD for USDT or TRX at a fixed 1:1 ratio, leveraging arbitrage to regulate supply and demand, ensuring the price stability of USDD. This also supports efficient asset management and transactions within the TRON DeFi ecosystem.

1. Open TokenPocket and select the token you want to exchange, USDT. Click \[Swap] at the bottom right of the interface.

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2. Choose USDT as the token to exchange out, and select USDD as the token to exchange in. Set the amount you want to exchange and click \[Approve USDT]. Since this is the first time calling USDT, there will be two steps: first, authorize the token and then proceed with the exchange.

<figure><img src="https://2634619309-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F3qtItoZih7cEdFc6kPNk%2Fuploads%2FZ26fnlthgJ83b7E2BFvg%2F2%20%E6%8B%B7%E8%B4%9D.png?alt=media&#x26;token=ddccf4d1-10ab-4baa-9aad-8683c09a0a33" alt=""><figcaption></figcaption></figure>

3. During the process, pay attention to the network fee. You can click on the network fee and select the energy deduction or USDT payment option to execute the transaction. Once the exchange is complete, you will see the USDD tokens.

<figure><img src="https://2634619309-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F3qtItoZih7cEdFc6kPNk%2Fuploads%2FGAq5DnbIlyOl8gFeHiwU%2Fimage.png?alt=media&#x26;token=f11bdb3c-9f03-4749-a6c9-b4831d0ca931" alt=""><figcaption></figcaption></figure>