AoX: Arbitrum on GC

Arbitrum Optimistic Rollup Deployment

Arbitrum has been deployed to Gnosis Chain called AoX! This unofficial instance was deployed for research and development purposes, cultivating a broad ecosystem for developers and users.

We are currently working on configs and bridge installation, Blockscout is already configured for AoX. Look for more info and instructions coming soon.

For information on Arbitrum and usage basics, see the Arbitrum docs. Note that AoX is still being finalized, and some functionality is not yet available.

Basic Info

Item	Value
RPC	https://arbitrum.xdaichain.com/
WSS	wss://arbitrum.xdaichain.com/wss
Chain ID	200
Explorer	https://blockscout.com/xdai/aox/
Rollup Contract	0xB17F1CaF8aceA14B9Bb877E67EAAde785E7D6F39
Inbox Contract	0x9ab4bf8a231854ce5983c5fd69664859f717359d
Outbox Contract	0xD4319f5F233d907382911c5c3Ceea3cc68921c20
Contracts version	7897c3
Arb OS version	48
Sequencer/Validator docker image	v1.0.0-2b628f8

MetaMask Custom Network

Deposits to AoX

Simple deposit functionality for users / bridge implementation is still in development. Devs can use the following ABI to call the depositEth method. Use 0 for maxSubmissionCost and attach an amount of xDai tokens to the transaction. It may take several minutes for execution finalization.

• Deposit Example Transaction
• ABI ⬇️

[
  {
    "inputs":[
      {
        "internalType":"uint256",
        "name":"maxSubmissionCost",
        "type":"uint256"
      }
    ],
    "name":"depositEth",
    "outputs":[
      {
        "internalType":"uint256",
        "name":"",
        "type":"uint256"
      }
    ],
    "stateMutability":"payable",
    "type":"function"
  }
]

BlockScout Deposit Example

1. Connect your wallet to blockscout.

2. Go to the Write Proxy tab in the AoX Inbox contract
3. In the depositEth method

   1. Enter 0 for maxSubmissionCost field

   2. Enter the amount of xDai to deposit

   3. Click Write and confirm in MetaMask

Once completed, it may take several minutes for the transaction to arrive at your address on the rollup. Switch to Arbitrum on xDai in Metamask to view the deposit.

Withdrawals

Instructions in process

Contract Deployment

Hardhat

To adjust deployment, simply use the xDai Arbitrum RPC url in your hardhat.config.ts:

module.exports = {
  solidity: '0.7.3',
  networks: {
    arbitrum: {
      url: 'https://arbitrum.xdaichain.com/',
      gasPrice: 0,
    },
  },
}

For more info on Arbitrum and usage basics, please see the Arbitrum docs. You can work with Arbitrum on xDai as you would on Ethereum.