Withdrawing assets from the L2

This section explains how to withdraw funds from the L2 through the native bridge.

Prerequisites for L2 withdrawal

• An L2 account with sufficient ETH balance, for developing purpose you can use:
  • Address: 0x8943545177806ed17b9f23f0a21ee5948ecaa776
  • Private Key: 0xbcdf20249abf0ed6d944c0288fad489e33f66b3960d9e6229c1cd214ed3bbe31
• The address of the deployed CommonBridge L2 contract (note here that we are calling the L2 contract instead of the L1 as in the deposit case). If not specified, You can use:
  • CommonBridge L2: 0x000000000000000000000000000000000000ffff
• An Ethereum utility tool like Rex.

Making a withdrawal

Using Rex, we simply run the rex l2 withdraw command, which uses the default CommonBridge address.

# Format: rex l2 withdraw <AMOUNT> <PRIVATE_KEY> [RPC_URL]
rex l2 withdraw 5000 0xbcdf20249abf0ed6d944c0288fad489e33f66b3960d9e6229c1cd214ed3bbe31

If the withdrawal is successful, the hash will be printed like this:

Withdrawal sent: <L2_WITHDRAWAL_TX_HASH>
...

Claiming the withdrawal

After making a withdrawal, it has to be claimed in the L1, through the L1 CommonBridge contract. For that, we can use the Rex command rex l2 claim-withdraw, with the tx hash obtained in the previous step. But first, it is necessary to wait for the block that includes the withdraw to be verified.

# Format: rex l2 claim-withdraw <L2_WITHDRAWAL_TX_HASH> <PRIVATE_KEY> <BRIDGE_ADDRESS> [L1_RPC_URL] [RPC_URL]
rex l2 claim-withdraw <L2_WITHDRAWAL_TX_HASH> 0xbcdf20249abf0ed6d944c0288fad489e33f66b3960d9e6229c1cd214ed3bbe31 0x65dd6dc5df74b7e08e92c910122f91d7b2d5184f

Verifying the withdrawal

Once the withdrawal is made you can verify the balance has decreased in the L2 with:

rex l2 balance 0x8943545177806ed17b9f23f0a21ee5948ecaa776

And also increased in the L1:

rex balance 0x8943545177806ed17b9f23f0a21ee5948ecaa776