> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://support.mixin.one/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# What to Do If Your Common Wallet Has No Gas Fees?

Mixin’s **Common Wallet** functions like a Web3 wallet. Just like other Web3 wallets, **you must pay blockchain gas fees using the native asset of the chain** when withdrawing crypto. This means your Common Wallet must hold the corresponding chain’s token to cover fees.

### Gas Fee Requirements by Chain
| Blockchain | Required Gas Token |
| ---- |
| Ethereum (ETH) & all ERC20 tokens (e.g., ERC20-USDT, XIN) | ETH |
| Base Chain & all Base tokens | ETH on Base Chain |
| Polygon Chain & all Polygon tokens | POL |
| Binance Smart Chain (BSC) & all BEP20 tokens | BNB (BEP20) |
| Solana Chain & all Solana tokens | SOL |
| Optimist chain& all Optimism token | ETH on Optimism Chian |
| Arbitrum chain& all Arbitrum token | ETH on Arbitrum Chian |
| ✅ Note: ETH on Base is different from ETH on Ethereum Mainnet. Pay attention to the asset labels.

### What Happens When You Lack Gas?
If your wallet doesn’t have enough gas (native chain asset), the **Review button will be greyed out**, and you won’t be able to initiate a withdrawal.

![](https://storage.crisp.chat/users/helpdesk/website/-/7/1/9/9/71991a4db339f000/002_155uf2g.jpeg)

### How to Get the Required Gas Fees

1. Identify the Required Chain and Amount

Mixin will display the exact asset and amount needed for gas on the failed transaction page.

2. Deposit the Required Asset

You can do this in one of two ways:
•	Transfer from an external exchange or wallet to your Common Wallet;
•	Transfer from your Mixin Privacy Wallet to your Common Wallet.

| 🔔 Gas fees fluctuate. It is recommended to deposit slightly more than the displayed fee amount to ensure a smooth transaction.

3. Wait for Confirmation

Once the asset arrives, you’ll be able to proceed with transfers or withdrawals.