Bridging In (and Out)

Bridging value "in" and "out" of Facet will resemble experiences you are familiar with on other rollups. We'll demonstrate end-to-end flow of bridging L1 ether (ETH) into Facet as Facet-Wrapped ETH (WETH) using FacetSwap.com, a DEX built on Facet Protocol.

Bridging Into Facet (From L1)

1

Navigate to FacetSwap.com/bridge

Start the bridging process by heading to the FacetSwap bridge page. This is where you’ll initiate transferring assets from Ethereum mainnet to Facet.

2

Connect your Ethereum Wallet

Connect your Ethereum wallet (such as MetaMask or OKX Wallet) to the site. This will allow the bridge to access your Ethereum account to transfer assets securely. Make sure your wallet is set to the Ethereum network.

3

Specify the Amount to Bridge In

Enter the amount of ETH or WETH you want to bridge from Ethereum mainnet to Facet. This amount will determine the assets that get transferred and accessible on the Facet network.

4

Click "Bridge In" at Bottom

Click the "Bridge In" button to confirm the details of your transaction and begin the transfer process. This action will prompt your wallet to request confirmation, so double-check the amount before proceeding.

5

Confirm the Transaction in your Wallet

Approve the transaction within your wallet. This step authorizes the smart contract to transfer the specified amount from your Ethereum account into the bridge. Once confirmed, your transaction will be processed, and your assets will be moved from Ethereum mainnet to Facet.

After confirming the transaction in your wallet, a "success" notification appears within the app. You'll now see an updated Facet balance (e.g., 0.15 WETH) reflecting the recently bridged asset now available within Facet network. You can now execute other Facet trades on FacetSwap using this WETH balance.

Bridging Out of Facet (to L1)

Now let's bridge some of that Facet-wrapped ETH (WETH) back out to L1 Ethereum.

1

Select "Bridge Out"

Initiate the process to withdraw WETH from Facet to Ethereum by selecting the "Bridge Out" option.

2

Specify the Amount of WETH to Bridge Out

Enter the amount of WETH you want to move from Facet to Ethereum mainnet.

3

Click "Bridge Out" at Bottom

Click the "Bridge Out" button to proceed with your withdrawal request.

4

Confirm the Transaction in your Wallet

Approve the transaction within your wallet to officially initiate the bridging process.

5

Withdrawal Status = "Waiting for state root"

At this stage, your withdrawal is waiting for a state root to be posted on the Ethereum mainnet. State roots are snapshots of the rollup network's state, allowing Facet transactions to be verified on Ethereum. This is a common mechanism across many rollup networks to ensure that state transitions on the rollup are verifiable on Ethereum. State roots are typically posted once a day, so you may need to wait until the next batch update.

6

Withdrawal Status = "Ready to prove" - Click Step 1: "Prove"

At this point, the system is ready to generate a proof for your transaction, which serves as cryptographic evidence that your withdrawal is valid and can be trusted. By clicking "Prove," you're initiating the process to confirm that your withdrawal aligns with the network’s state and rules. This proof helps prevent any unauthorized withdrawals from being processed.

7

Confirm the Transaction in your Wallet

Approve this step in your wallet to authorize the proof generation, ensuring that the transaction can progress to the next phase.

8

Withdrawal Status = "In challenge period"

Once the proof is generated, your transaction enters a challenge period. This period gives other network participants the opportunity to review the withdrawal proof and contest it if it appears invalid. The challenge period is a standard security feature on rollup networks, designed to protect the network and users from potential fraud by giving the community time to verify the legitimacy of the withdrawal. The challenge period of FacetSwap.com is less than 1 minute.

9

Withdrawal Status = "Ready for relay" - Click Step 2: "Finalize"

After the challenge period ends (< 1 minute) without any disputes, your withdrawal becomes ready for relay to Ethereum. By clicking "Finalize," you're triggering the last step in the process, which will transfer your WETH from Facet to your Ethereum wallet.

10

Confirm the Transaction in your Wallet

Approve the final transaction in your wallet to complete the transfer.

Once the process is fully complete, check your balances. You should see an increase in your ETH balance on Ethereum and a decrease in your WETH balance on Facet, confirming that the bridge-out was successful and your funds have been received.