Bridge Assets

Bridging is how developers move assets across networks, bringing liquidity from your settlement chain (e.g. Ethereum or Base) into your appchain and letting users exit back when needed. Use it to fund system wallets, seed liquidity, and build smooth cross-network product experiences.

Deposits follow the canonical bridge flow; withdrawals use Syndicate’s fast, secure withdrawal path.

Bridge UI Walkthrough

1. Access the Bridge: Open Arbitrum Bridge.
2. Connect Your Wallet: Use MetaMask or another supported wallet.
3. Add Your Appchain (once): In the destination network selector, choose “Add custom chain” and provide your appchain details (Chain ID, Name, RPC URL, Explorer URL).
4. Select Networks: Choose the source (e.g., Ethereum/Base) and destination (your appchain) networks.
5. Choose Asset and Amount: Select the token and enter the amount you want to bridge.
6. Submit Transaction: Review details and confirm the transaction in your wallet.

Deposit Process (Parent Chain → Appchain)

+----------------------------------+   +-------------------+   +-------------------------+
| Grant Token Allowance (ERC-20)   |-->| Submit Deposit    |-->| Receive Bridged Funds   |
+----------------------------------+   +-------------------+   +-------------------------+

1. Grant Token Allowance (ERC-20 only): In your wallet, approve the bridge contract to spend the selected token - For native assets (e.g., ETH), no allowance is needed.
2. Submit Deposit: Enter the amount, review details, and confirm the deposit transaction on the source network.
3. Receive Bridged Funds: After confirmations, the bridged asset appears on your appchain within a few minutes.

Withdrawal Process (Appchain → Parent Chain)

+-----------------------+   +------------------+   +---------------------------+
| Submit Withdrawal     |-->| Fast Validation  |-->| Finalize on Parent Chain  |
+-----------------------+   +------------------+   +---------------------------+

Withdrawals are powered by Syndicate's custom system for speed and security:

1. Submit Withdrawal: On your appchain, select the asset and amount, then confirm the withdrawal transaction.
2. Fast Validation: The system validates your request using TEE and ZKVM attestation for speed and security.
3. Finalize on Parent Chain: After the challenge period on the canonical bridge ends, you must manually finalize/claim the withdrawal on the parent chain using your wallet. Funds are not transferred automatically.

For a deeper understanding, see the Asset Withdrawal core concept.

Developer Security Best Practices

• Monitor bridge activity and set up alerts for unusual patterns
• Implement rate limiting and value caps appropriate for your use case
• Regularly review and audit bridge contract configurations
• Have emergency response procedures in place for potential security incidents
• Test bridge functionality thoroughly on testnets before mainnet deployment

Bridging SYND Tokens to Base

You can bridge SYND tokens from Ethereum mainnet to Base using Superbridge, a user-friendly bridging interface.

Using Superbridge

1. Access the bridge UI: Navigate to Superbridge with the pre-configured SYND token parameters.

2. Connect your wallet: Ensure your wallet is connected to Ethereum mainnet.

3. Add the SYND token: In the token search bar, paste the SYND token address:

   • SYND on Base network: 0x11dC28D01984079b7efE7763b533e6ed9E3722B9

4. Import the token: If you encounter issues finding the token, you may also need to paste the SYND address on ETH mainnet(0x1bAB804803159aD84b8854581AA53AC72455614E).

5. Complete the bridge: Follow the standard bridging process to transfer your SYND tokens to Base.

Token Addresses

• SYND on Ethereum: 0x1bAB804803159aD84b8854581AA53AC72455614E
• SYND on Base: 0x11dC28D01984079b7efE7763b533e6ed9E3722B9