# Transaction Speed Up and Cancellation When a transaction cannot be completed due to low gas fees, users can use the speed-up or cancellation feature. Please note this feature is only available for **BTC and ETH-based** cryptocurrencies. ## **ETH Series** ### **Transaction Speed Up** Click "**Speed Up**" in the pending transaction.

After clicking, if the token has more than one pending transaction, a transaction speed-up list page will pop up. Operate in order from the smallest Nonce to the largest by clicking "Speed Up." If the token has only one pending transaction, skip this step.

Clicking "Speed Up" will expand the transaction details and provide options for the speed-up gas fee. Click to choose from different gas fee options. Users can also customize the gas fee.

Custom gas fee settings are divided into **Advanced Mode** and **Standard Mode**: * **Advanced Mode**: Uses the **EIP-1559 protocol**, which applies a new fee calculation method to accelerate transaction confirmation. This mode theoretically reduces gas fees compared to Standard Mode. In Advanced Mode, users can customize the Max Fee and Max Priority Fee, allowing precise control to ensure transaction priority. This mode is particularly suitable for users who need high-priority confirmation while aiming to save on fees. * **Standard Mode**: Based on the traditional gas fee structure, users can set the Gas Price and Gas Limit to determine the transaction fee. Although this mode is gradually being replaced by the EIP-1559 protocol, it remains suitable for users who are unfamiliar with the new mode or prefer traditional fee settings.

Once the setup is complete, proceed with identity verification.

After authentication is complete, you will see a "Speeding Up" tag.

After the speed-up is complete, you will see an "Sped Up" tag.

### Transaction Cancellation Click "**Cancel"** within a pending transaction.

After clicking, if the token has more than one pending transaction, a transaction cancellation list page will pop up. Operate in order from the smallest Nonce to the largest by clicking "Cancel." If the token has only one pending transaction, skip this step.

Clicking "Cancel" will expand the transaction details and provide options for the cancellation gas fee. Click to choose from different gas fee options. Users can also customize the gas fee. Since canceling a transaction involves resending a transaction with an amount of $0, the sending amount here is displayed as 0.

After completing the setup, proceed with identity verification.

After successful cancellation, the user interface will show two transaction records. The one with an amount of 0 is the record for the cancellation transaction, while the previous record will have a "Cancelled" tag. ## BTC Series ### **Transaction Speed Up** Click "**Speed Up**" in the pending transaction.

Once clicked, transaction details will expand with an option to increase the gas fee. Users can choose from different gas fee options or customize the fee.

CUsers can set the Gas Price and Gas Limit when customizing the gas fee. The system will automatically estimate the gas fee as a reference.

After completing the setup, click "Confirm" and proceed with identity verification.

Once verification is successful, a "Speeding Up" tag will appear. If the waiting time is too long, users can choose to accelerate again by adjusting the gas fee.

After the acceleration is complete, an "Speed up" tag will be displayed.

### **Transaction Cancellation** In the pending transaction, click "**Cancel**".

Clicking will expand the transaction details, showing an option to set the gas fee for cancellation. Users can choose from various gas fee options or customize the fee. For BTC cancellations, the Replace-by-Fee (RBF) method is used, which sends a new transaction with the same UTXO as the original. As a result, the transaction amount is **displayed as $0.**

After completing the setup, proceed with identity verification.

Upon successful cancellation, the user interface will display two transaction records: one with an amount of $0, representing the cancellation request, and the earlier record will show a "Cancelled" tag.