# Withdrawals

For **L2 to L1 withdrawals**, the process begins when a user interacts with the **`L2BaseToken.sol`** system contract on the **Via chain** to **burn their assets**. During this transaction, the user specifies the **L1 recipient address**, and the contract logs the withdrawal request within the **L1 batch** by emitting a **`Withdrawal` event**.

Once the **L1 batch** reaches **finality**, the **Verifier Network** extracts all **withdrawal requests** from the logged batch data and initiates a [withdrawal session](https://docs.vianetwork.xyz/verifier-network#withdrawals)

#### Withdrawal Process and Fees

Users **do not need to manually claim their BTC** on the Bitcoin chain. When a withdrawal is processed, the **verifier network** automatically sends the BTC to the wallet specified by the user during the withdrawal transaction on Via Network.

To prevent network spam, the verifier network charges a **withdrawal fee**. This fee is calculated based on the **current network gas price** and the **number of withdrawals processed in a batch** the more withdrawals included in a batch, the lower the individual withdrawal fee.

#### Withdrawal Processing Condition

A withdrawal can only be processed if the **amount being withdrawn is sufficient to cover the transaction cost**. If the requested withdrawal is smaller than the calculated fee, the verifier network will not process it until the amount is sufficient or combined with other withdrawals in a batch to cover costs.