# Mainnet Bridges Overview

_Learn about using and accessing bridges on Mezo Mainnet for seamless asset movement._

_Source: https://mezo.org/docs/users/mainnet/bridges_

You can deposit and withdraw assets to and from Mezo using the Mezo Native Bridge.
# Deposits

## Mezo Native Bridge Deposits

The Mezo app includes a native bridge where you can deposit several assets from Ethereum to Mezo Mainnet. See the [Deposit Assets](/docs/users/getting-started/deposit-assets) guide to learn how the process works, or go directly to [mezo.org/overview](https://mezo.org/overview), sign in with an EVM wallet, and click **Deposit** to get started.

> **Note:**
>
> All transactions on Mezo Mainnet are paid in BTC. tBTC deposited from Ethereum arrives as BTC on Mezo, so it's recommended to fund your account with tBTC to ensure you have gas to pay for transactions.

## Native BTC Bridge-in (ended)

As of October 13, 2026, the Native BTC Bridge-in is closed and the Mezo app no longer accepts deposits from Bitcoin wallets. Bridge-outs directly to BTC remain available (see [Bridging to Bitcoin](#bridging-to-bitcoin-for-native-btc-only)). To bring BTC to Mezo, deposit tBTC from Ethereum instead. It settles in minutes and has no minimum. See [Deposit Assets](/docs/users/getting-started/deposit-assets).

If you hold BTC in a Bitcoin wallet, create a Mezo account with an EVM wallet and manage deposits from there. If you started a native deposit before October 13, see [Track Your Native Bitcoin Deposit](/docs/users/mainnet/track-your-native-bitcoin-deposit).

Accounts that sign in with a Bitcoin wallet (UniSat, OKX, Xverse) can move their assets to an EVM wallet on Mezo under **Transact > Send** in the Mezo app (see [Send Assets](/docs/users/passport/send-assets)), then deposit and manage everything from that wallet. They can also still [withdraw BTC to Bitcoin](#bridging-to-bitcoin-for-native-btc-only). Bitcoin wallets use the following address types:

| Name           | Script Type | Address Prefix |
| -------------- | ----------- | -------------- |
| Legacy         | P2PKH       | 1              |
| Native SegWit  | P2WPKH      | bc1q           |
| Nested SegWit  | P2SH-P2WPKH | 3              |

# Withdrawals 

## Moving Your Assets from Mezo to Other Networks

*Last updated: September 2026*

This guide explains how to bridge your assets out of Mezo back to the Ethereum or Bitcoin networks. We'll cover what you can bridge, how to do it, the bridges used, fees involved, and what to expect during the process. Currently, the minimum required amount to bridge is 0.01 BTC for withrawing to native Bitcoin, 0.0002 BTC for withdrawing BTC to Ethereum, 20 of the token for USD tokens bridged via Native Bridge (USDC, USDT, USDe, DAI), 0.01 of the token for tokens bridged via Wormhole Bridge (MEZO, MUSD, sUSDat), and 1,500 T for T token. See more details [here.](#bridging-to-ethereum)

### From Mezo to Other Networks

| Your Asset on Mezo | Destination Network | What You'll Receive | Notes |
|-------------------|-------------------|-------------------|--------|
| **BTC** | Ethereum | tBTC (ERC-20 token) | You always receive tBTC on Ethereum, not WBTC or other wrapped versions |
| **BTC** | Bitcoin | Native BTC | Real Bitcoin sent to your Bitcoin wallet |
| **mERC-20 tokens** | Ethereum | Original ERC-20 token | Get back the same tokens you originally bridged in (like USDC, USDT, etc.) |
| **MUSD** | Ethereum, Base | MUSD | Bridge as little as 0.01 MUSD between Mezo, Base, and Ethereum. Bridge powered by Wormhole. |
| **MEZO** | Ethereum, Base, BSC, Solana | MEZO | Bridge powered by Wormhole NTT. See the [MEZO Bridge guide](/docs/users/mezo/mezo-bridge) for details. |
| **mERC-20 tokens** | Bitcoin | Not available | ERC-20 tokens can't be sent to Bitcoin |

> **Key Points:**
>
> - You can bridge your assets between Mezo and Bitcoin mainnet, Ethereum, and Base network.
> - BTC can go to Ethereum (as tBTC) or to Bitcoin (as native BTC).
> - Tokens like USDC or T (represented as m-tokens on Mezo) can only go back to Ethereum.
> - MEZO and MUSD can be bridged to and from Base network via [Wormhole NTT](/docs/users/mezo/mezo-bridge).
> - MEZO tokens can also be bridged to BSC and Solana via [Wormhole NTT](/docs/users/mezo/mezo-bridge).
> - Bitcoin Taproot addresses (starting with `bc1p`) aren't supported yet.

## How to Bridge Out

### Bridging to Ethereum (for tBTC or ERC-20 tokens)

1. **Click the 'Withdraw' button** in the top right of the Mezo App.

2. **Choose your asset:**
   - Select BTC to receive tBTC on Ethereum.
   - Select any mERC-20 token to receive the original token on Ethereum.

3. **Enter the amount** you want to bridge.

4. **Review the fees** displayed on screen.

5. **Confirm and submit** the transaction.

6. **If bridging mERC-20 tokens**, you may need to approve the transaction first.

### Bridging to Bitcoin (for native BTC only)

1. **Click the 'Withdraw' button** in the top right of the Mezo App.

2. **Choose BTC** as your asset.

3. **Select Bitcoin** as your destination network.

4. **Enter the amount** to bridge.

5. **Paste your Bitcoin address** - supported formats:
   - Legacy addresses (starting with `1`)
   - SegWit addresses (starting with `3` or `bc1q`)
   - **Not supported:** Taproot addresses (starting with `bc1p`)

6. **Review the fees** and confirm.

7. **Submit** the transaction.

## Understanding Bridge Routes

When withdrawing assets from Mezo, the system automatically determines which bridge to use. This information appears on the "Bridge" line in your withdrawal modal.

-   **Mezo Native Bridge:** Used for all standard withdrawals of assets like BTC and mERC-20 tokens.
-   **Wormhole Bridge:** A third-party bridge used for MUSD withdrawals to Ethereum and [MEZO token transfers](/docs/users/mezo/mezo-bridge) to Ethereum, Base, BSC, and Solana.
-   **Super Bridge (Coming Soon):** A Mezo native bridge that will support deposits and withdrawals for smaller denominations of assets.

Fees will be accurately displayed in the app depending on the bridge route used for your specific transaction.

## Understanding Fees

When bridging out, you pay fees for the bridging service and network operations. All fees are clearly displayed before you confirm any transaction.

### Native Bridge's Fee Structure (v2)

Withdrawals from Mezo include a simple fee:

- Flat fee — a fixed amount equal to about $3 USD in that token's value.

#### Bridging to Ethereum

Minimum Withdrawal Amounts

- BTC-based tokens (BTC, mcbBTC, mFBTC, mSolvBTC, mswBTC, mxSolvBTC): 0.0002
- USD-based tokens bridged via Native Bridge (mUSDC, mUSDT, mDAI, mUSDe): 20
- mT tokens: 1,500

Fees

- Mezo Bridge Service Fee: ≈ $3 USD (computed in the target token)
- Network Fee (Gas): Paid in BTC, varies with network conditions

Example:

Withdrawing 1,000 USDC → $3 Service Fee + variable Gas Fee → receive ~997 USDC.

#### Bridging to Bitcoin

Minimum Withdrawal Amount: 0.01 BTC

Fees

- Network Fee (Gas): Paid in BTC, varies
- Mezo Bridge Service Fee: ≈ 0.000027 BTC
- tBTC Bridge Service Fee: 0.2% (after Mezo Bridge Service Fee)
- tBTC Bridge Maximum Network Fee: up to 0.001 BTC (though usually < $1)

##### Example:

Withdraw amount: 1 BTC

Fees:
  - 0.000027 BTC (Mezo Bridge Service Fee)
  - 0.001999946 BTC (tBTC Bridge Service Fee)
  - variable tBTC Bridge Network Fee and Gas Fee

Received amount: ~0.997973 BTC.

## What Happens After You Submit

Once you initiate a bridge-out transaction, here's the process:

1. **Validation:** The system verifies your request meets all requirements.

2. **Token Burn:** Your tokens on Mezo are burned (permanently removed from circulation).

3. **Attestation:** Mezo validators confirm your withdrawal request.

4. **Delivery:** Your assets are sent to your destination address.

### Timeline and Status Updates

Your bridge transaction will show these status updates:

-   **Created:** Your request has been recorded.
-   **Attesting:** Validators are confirming your withdrawal.
-   **Ready to Withdraw:** Confirmations complete, assets are being sent.
-   **Withdrawn/Redeemed:** Assets successfully delivered to your destination address.

You can track your transaction using the transaction hash provided in the interface.

## Important Address Requirements

### For Ethereum Destinations
-   Must be a valid Ethereum address (`0x` followed by 40 characters).
-   Can be a regular wallet or a smart contract that accepts standard token transfers.
-   Exchange deposit addresses work if they accept direct token transfers.

### For Bitcoin Destinations
Supported address types:
-   Legacy addresses (starting with `1`)
-   SegWit wrapped addresses (starting with `3`)
-   Native SegWit addresses (starting with `bc1q`)

**Not supported:** Taproot addresses (starting with `bc1p`)

## Safety Reminders

Before confirming any bridge transaction:

-   ✅ **Double-check the destination address** - transactions can't be reversed.
-   ✅ **Verify you've selected the correct network** (Ethereum vs Bitcoin).
-   ✅ **Confirm the fee amount** shown in the app.
-   ✅ **Remember that bridge-outs cannot be cancelled** once submitted.
-   ✅ **Ensure your destination address format is supported.**

> **Warning:**
>
> If you send funds to an incorrect but validly formatted address, your funds will be permanently lost. Always copy-paste addresses and verify them carefully.

### Troubleshooting Common Issues

#### "Approval Required" Message
**For mERC-20 tokens:** You need to approve the bridge contract to spend your tokens first. Click "Approve" when prompted, confirm the transaction, and then you can proceed with the bridge.

#### "Unsupported Asset for Destination"
Remember:
-   mERC-20 tokens and MUSD can only go to Ethereum.
-   BTC can go to either Ethereum (as tBTC) or Bitcoin.

#### "Invalid Recipient Address"
Check that:
-   Ethereum addresses start with `0x` and have 42 total characters.
-   Bitcoin addresses use supported formats (no `bc1p` Taproot addresses).
-   You're not using a testnet address for a mainnet transaction.

#### Transaction Seems Stuck
Check the status in your transaction history:
-   If showing "Created" or "Attesting" - validators are still processing.
-   If showing "Ready to Withdraw" - the transfer is in progress on the destination network.
-   Contact support with your transaction ID if it has been pending for an unusually long time.

### Frequently Asked Questions

**Q: What's the difference between BTC on Mezo and tBTC on Ethereum?**
A: When you bridge BTC from Mezo to Ethereum, it becomes tBTC, an ERC-20 token that represents Bitcoin on the Ethereum network. tBTC is backed 1:1 by native Bitcoin and can be redeemed for it.

**Q: Can I bridge my mERC-20 tokens to Bitcoin?**
A: No, ERC-20 tokens are native to Ethereum-compatible networks. You can only bridge them back to Ethereum.

**Q: Why can't I use my Taproot Bitcoin address?**
A: The bridge currently supports standard Bitcoin address formats. Taproot (`bc1p`) support is planned for a future update.

**Q: Can I cancel a bridge transaction?**
A: No, once submitted, bridge transactions cannot be cancelled. Your Mezo tokens are immediately burned as part of the process.

**Q: How long does bridging take?**
A: Most transactions bridging funds to Ethereum via Native Bridge complete within 30-60 minutes, depending on network conditions and validator attestation speed. Withdrawals routed via Wormhole Bridge typically take around 5 minutes to process. Transactions withdrawing funds to Bitcoin usually take a couple of hours to finalize.

**Q: What networks can I bridge to?**
A: Assets can be bridged between Ethereum, Mezo, Base, and Bitcoin. Additional network support will be added in the future.

**Q: Can I still deposit BTC from a Bitcoin wallet?**
A: No. The Native BTC Bridge-in closed on October 13, 2026. Deposit tBTC from Ethereum with an EVM wallet instead. See [Deposit Assets](/docs/users/getting-started/deposit-assets). Bridge-outs directly to BTC remain available.

**Q: A native Bitcoin deposit I started before October 13 hasn't appeared yet. How do I check its status?**
A: See [Track Your Native Bitcoin Deposit](/docs/users/mainnet/track-your-native-bitcoin-deposit) for a step-by-step guide on using tBTCScan to verify your deposit status.

**Q: Who pays for the gas on the destination network?**
A: For Ethereum, the bridge system handles the final delivery gas costs. For Bitcoin, the tBTC Bridge Network Fee covers the cost of the on-chain transaction.

## Security Model

Your bridge transaction requires approval from at least two-thirds of Mezo's bridge validators before your assets are released. This multi-signature approach ensures no single party can authorize withdrawals, keeping your funds secure throughout the bridging process.

## Need Help?

If you experience issues not covered in this guide:

1. Note your transaction ID or unlock sequence number.

2. Take a screenshot of any error messages.

3. Contact Mezo support with these details.

Remember: Always verify addresses carefully and understand the fees before confirming any bridge transaction.

## Deposit Portal

Deposits that are still in the portal as part of the early deposit program can be withdrawn back to the user's BTC wallet. The withdrawal fees from the portal for BTC will depend on the parameters set in the tBTC bridge. Currently, tBTC charges a 0.2% tBTC Bridge Service Fee and up to 0.001 BTC (typically significantly less) tBTC Bridge Network Fee, and these parameters are governance-controlled and can be viewed in the [tBTC fees documentation](https://docs.threshold.network/tbtc-v2#fees).