eth-withdraw

Tutorial: withdraw Ether or native token

eth-withdraw shows how to move Ether (or your chain's native token if you're using a custom gas token) from an Arbitrum or Orbit chain into its parent chain.

Note that this repo covers initiating a withdrawal. For a demo on releasing the funds from the Outbox, see outbox-execute

How it works (under the hood)

To withdraw Ether (or your chain's native token) from an Arbitrum chain, a client creates an outgoing / child to parent message using the ArbSys precompile that later lets them release the asset from its escrow in the parent chain's Bridge contract. For more info, see this page of the Arbitrum documentation.

Using the Arbitrum SDK

Our Arbitrum SDK provides a simply convenience method for withdrawing Ether (or your chain's native token), abstracting away the need for the client to connect to any contracts manually.

See ./exec.js for inline explanation.

Set environment variables

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., PRIVATE_KEY, CHAIN_RPC and PARENT_CHAIN_RPC.

Note that you can also set the environment variables in an .env file in the root of the monorepo, which will be available in all tutorials.

Run

yarn run withdrawETH

Note: Executing scripts will require your account be funded with .000001 Eth in the child chain.