Across

How to verify Across Bundles

Step 1: Install Required Dependencies:

git:

• Documentation: https://github.com/git-guides/install-git

yarn:

• Documentation: https://classic.yarnpkg.com/lang/en/docs/install/#mac-stable

node.js

• Documentation: https://nodejs.org/en/download

• Run the following command to check what version of node you are running: node -v Make sure it is greater than 16.18.0.

redis:

• Documentation: https://redis.io/docs/getting-started/installation/

• Note: Follow the relayer-v2 README instructions

ts-node

• You can use the following to install globally: npm install -g ts-node

Nvm (optional)

• Documentation: https://github.com/nvm-sh/nvm#installing-and-updating

• Note: Optional, but nvm allows you to easily install and switch between node versions

VS Code (optional)

• Highly recommend using a code editor like VS code.

Step 2: Clone the relayer-v2 repo:

• If using VS code, open the terminal and run the following command:

git clone https://github.com/across-protocol/relayer-v2

Step 3: Run Redis

Open a terminal window and run:

redis-server
From the README, run the three commands:
cd relayer-v2
yarn install
yarn build

Step 4: Environment Variables

• Change the .env.example file to .env

• In line 8 and 9, uncomment either the MNEMONIC or PRIVATE_KEY and input a private key that has no money on it.

  • I used https://vanity-eth.tk/ to create a private key to use for the demo but again, do not use one that has any money on it as it is an unnecessary risk.

• Sign up for an Infura account https://www.infura.io/ and click ‘Create New API Key’. After you create the key, you should see a list of endpoints for each network.

• In the .env file, update the following env variables to the URL for your infura account. The underscore number at the end of the variable represents the chain ID. So RPC_PROVIDER_ALCHEMY_1 is mainnet.

  • You can use https://chainlist.org/ to find the ID by network.

  • Include the NODE_URL_324 for zksync below even though it hasn’t been added to the .env.example file yet:

RPC_PROVIDER_ALCHEMY_1=https://eth-mainnet.g.alchemy.com/v2/{API_KEY}
RPC_PROVIDER_ALCHEMY_10=https://opt-mainnet.g.alchemy.com/v2/{API_KEY}
RPC_PROVIDER_ALCHEMY_137=https://polygon-mainnet.g.alchemy.com/v2/{API_KEY}
RPC_PROVIDER_ALCHEMY_42161=https://arb-mainnet.g.alchemy.com/v2/{API_KEY}
NODE_URL_324=https://mainnet.era.zksync.io

Step 5: Run the script

The below is an example, however the two changes that need to be made based on the request are:

• REQUEST_TIME=CHANGE_THIS_TO_THE_TIMESTAMP

• I used privateKey for the below, however, if you used mnemonic in your env variables, it should be changed to –wallet mnemonic

Note: The first time you run this, it is going to take a long time.

REQUEST_TIME=1692110627 ts-node ./src/scripts/validateRootBundle.ts --wallet privateKey

When the script finishes running, check the Validation results as shown below. The below shows an example of an invalid bundle as it shows “valid”: false:

{
  "at": "RootBundleValidator",
  "message": "Validation results",
  "rootBundle": {
    "poolRebalanceRoot": "0x7005c47a8e476a2551d5325a6c53cd5b71f308b2ac670742ad7cceb8078a193f",
    "relayerRefundRoot": "0x9edefc2fc000e71fa1ea1c6ce666a0f8cb2d6da422c45a372585da5e3b738713",
    "slowRelayRoot": "0x0000000000000000000000000000000000000000000000000000000000000000",
    "proposer": "0xf7bAc63fc7CEaCf0589F25454Ecf5C2ce904997c",
    "unclaimedPoolRebalanceLeafCount": 5,
    "challengePeriodEndTimestamp": 1692117191,
    "bundleEvaluationBlockNumbers": [
      17920824,
      108255396,
      46338509,
      977154,
      121659934,
      11305323
    ],
    "proposalBlockNumber": 17920860
  },
  "valid": false,
  "invalidReason": "Disputed pending root bundle:\n.....
// removed the rest of the invalidReason for the example

Appendix

For additional documentation on Across root bundles, visit:

https://docs.across.to/v/developer-docs/how-across-works/overview/disputing-root-bundles https://docs.across.to/v/developer-docs/how-across-works/overview/validating-root-bundles