eth-withdraw shows how to move Ether from Arbitrum (Layer 2) into the Ethereum (Layer 1) chain.
Note that this repo covers initiating and Ether withdrawal; for a demo on (later) releasing the funds from the Outbox, see outbox-execute
To withdraw Ether from Arbitrum, a client creates an outgoing / L2 to L1 message using the ArbSys interface that later lets them release Ether from its escrow in the L1 Bridge.sol contract. For more info, see Outgoing messages documentation.
In this repo we show 3 different examples of how a client may trigger an Ether withdrawal.
Note: Executing scripts will require your L2 account be funded with .000001 Eth.
ArbSys is a pre-compiled contract that exists in every Arbitrum Chain at address 0x0000000000000000000000000000000000000064. Its interface includes a withdrawEth method that can be called on L2 to initiate an Ether-withdrawal outgoing message (sendTxToL1 can also be used to withdraw Ether).
See ./exec-viaArbSys.js for inline explanation.
To run:
yarn run withdraw:arbsys
Withdraw.sol is an L2 contract that itself can make an external call to trigger a withdrawal. Our script connects to it and uses it to trigger an Ether withdrawal.
See ./exec-viaDApp.js for inline explanation.
To run:
yarn run withdraw:dapp
Finally, our arb-ts provides a simply convenience method for withdrawing Ether, abstracting away the need for the client to connect to any contracts manually.
See ./exec-viaLib.js for inline explanation.
To run:
yarn run withdraw:arb-ts
Set the values shown in .env-sample as environmental variables. To copy it into a .env file:
cp .env-sample .env(you'll still need to edit some variables, i.e., DEVNET_PRIVKEY)
Once the script is successfully executed, you can go to the Arbitrum block explorer, enter your address and see the amount of ETH has been deducted from your Layer 2 balance. Note that your Layer 1 balance will only be updated after rollup's confirmation period is over.
