> ## Documentation Index
> Fetch the complete documentation index at: https://docs.b3.fun/llms.txt
> Use this file to discover all available pages before exploring further.

# Bridge to B3 Testnet

> Easily bridge from Base Sepolia (Base Testnet) to B3 Sepolia (B3 Testnet) by following the steps below!

<Note>
  This bridge is specifically for testnet purposes. Use free testnet ETH to test your applications before deploying to mainnet.
</Note>

## How to Bridge

<Steps>
  <Step title="Visit the Testnet Bridge">
    Go to [testnet.bridge.b3.fun](https://testnet.bridge.b3.fun) to access the official testnet bridge interface.
  </Step>

  <Step title="Connect your Wallet">
    Connect your wallet (MetaMask, Coinbase Wallet, etc.) to the bridge interface.

    <Tip>
      Make sure your wallet is connected to either Base Sepolia or B3 Testnet depending on which direction you want to bridge.
    </Tip>
  </Step>

  <Step title="Choose Bridge Direction">
    Select whether you want to:

    * **Deposit**: Bring funds from Base Sepolia → B3 Testnet
    * **Withdraw**: Bridge back from B3 Testnet → Base Sepolia

    Click either the **Deposit** or **Withdraw** tabs accordingly.
  </Step>

  <Step title="Enter Amount">
    Enter the amount of ETH you want to bridge.

    <Card title="Need Base Sepolia ETH?" icon="faucet" href="https://docs.base.org/base-chain/tools/network-faucets" cta="Get Base Testnet ETH" horizontal>
      If you need Base Sepolia ETH, use a Base Sepolia faucet to get free testnet tokens
    </Card>
  </Step>

  <Step title="Confirm Transaction">
    Click "Deposit" (or "Withdraw") and confirm the transaction prompt that appears in your wallet.

    <Warning>
      Double-check that you're on the correct testnet and using testnet ETH, not mainnet funds.
    </Warning>
  </Step>

  <Step title="Wait for Completion">
    Wait a few minutes for the bridge process to complete. You can check the status in your "History" tab.

    <Check>
      Your testnet ETH will appear in your wallet on the destination network within a few minutes.
    </Check>
  </Step>
</Steps>

## Network Information

<CardGroup cols={2}>
  <Card title="Base Sepolia Testnet">
    **Chain ID**: 84532\
    **RPC**: [https://sepolia.base.org](https://sepolia.base.org)\
    **Explorer**: [https://sepolia.basescan.org](https://sepolia.basescan.org)
  </Card>

  <Card title="B3 Sepolia Testnet">
    **Chain ID**: 1993\
    **RPC**: [https://testnet-rpc.b3.fun](https://testnet-rpc.b3.fun)\
    **Explorer**: [https://testnet-explorer.b3.fun](https://testnet-explorer.b3.fun)
  </Card>
</CardGroup>

## Testnet Resources

<CardGroup cols={2}>
  <Card title="Testnet Bridge" icon="bridge" href="https://testnet.bridge.b3.fun" cta="Bridge Now">
    Official bridge for moving assets between Base Sepolia and B3 Testnet
  </Card>

  <Card title="B3 Testnet Faucet" icon="faucet" href="https://testnet-faucet.b3.fun" cta="Get Test ETH">
    Get free B3 testnet ETH for development and testing
  </Card>
</CardGroup>

## Additional Faucets

If you need testnet ETH for development, here are some reliable faucet options:

<AccordionGroup>
  <Accordion title="Base Sepolia Faucets">
    * [Coinbase Base Faucet](https://coinbase.com/faucets/base-ethereum-sepolia-faucet) - Official Coinbase faucet
    * [Alchemy Base Sepolia Faucet](https://sepoliafaucet.com) - Reliable faucet for Base Sepolia ETH
    * [QuickNode Base Faucet](https://faucet.quicknode.com/base/sepolia) - Multiple testnet support
  </Accordion>

  <Accordion title="B3 Testnet Faucet">
    * [B3 Testnet Faucet](https://testnet-faucet.b3.fun) - Official B3 testnet faucet
    * Get free B3 testnet ETH directly without bridging
  </Accordion>
</AccordionGroup>

## Troubleshooting

<AccordionGroup>
  <Accordion title="Bridge transaction stuck">
    * Check the transaction status on the block explorer
    * Verify you're connected to the correct testnet
    * Try increasing gas fees if the transaction is pending
    * Contact support if the bridge has been pending for over 30 minutes
  </Accordion>

  <Accordion title="Wallet not connecting">
    * Ensure your wallet supports the testnet networks
    * Try refreshing the page and reconnecting
    * Check that you're on the correct network in your wallet
    * Clear your browser cache if issues persist
  </Accordion>

  <Accordion title="Insufficient funds for gas">
    * Make sure you have enough ETH to pay for gas fees
    * Use a faucet to get more testnet ETH
    * Try bridging a smaller amount to conserve gas
  </Accordion>
</AccordionGroup>

## Development Workflow

<Steps>
  <Step title="Get Base Sepolia ETH">
    Use a Base Sepolia faucet to get free testnet ETH.
  </Step>

  <Step title="Bridge to B3 Testnet">
    Use the testnet bridge to move ETH from Base Sepolia to B3 Testnet.
  </Step>

  <Step title="Deploy and Test">
    Deploy your contracts and test your applications on B3 Testnet.
  </Step>

  <Step title="Ready for Mainnet">
    When testing is complete, deploy to B3 Mainnet using the [mainnet bridge](/protocol/bridge).
  </Step>
</Steps>