70 lines
2.9 KiB
Markdown
70 lines
2.9 KiB
Markdown
# Wormhole bridge - ETH
|
|
|
|
These smart contracts allow to use Ethereum as foreign chain in the Wormhole protocol.
|
|
|
|
The `Wormhole` contract is the bridge contract and allows tokens to be transferred out of ETH and VAAs to be submitted
|
|
to transfer tokens in or change configuration settings.
|
|
|
|
The `WrappedAsset` is a ERC-20 token contract that holds metadata about a wormhole asset on ETH. Wormhole assets are all
|
|
wrapped non-ETH assets that are currently held on ETH.
|
|
|
|
### Deploying
|
|
|
|
To deploy the bridge on Ethereum you first need to compile all smart contracts:
|
|
`npx truffle compile`
|
|
|
|
To deploy you can either use the bytecode from the `build/contracts` folder or the oz cli `oz deploy <Contract>`
|
|
([Documentation](https://docs.openzeppelin.com/learn/deploying-and-interacting)).
|
|
|
|
You first need to deploy one `Wrapped Asset` and initialize it using dummy data.
|
|
|
|
Then deploy the `Wormhole` using the initial guardian key (`key_x,y_parity,0`) and the address of the previously deployed
|
|
`WrappedAsset`. The wrapped asset contract will be used as proxy library to all the creation of cheap proxy wrapped
|
|
assets.
|
|
|
|
### Testing
|
|
|
|
For each test run:
|
|
|
|
Run `npx ganache-cli --deterministic --time "1970-01-01T00:00:00+00:00"` to start a chain.
|
|
|
|
Run the all ethereum tests using `make test`
|
|
|
|
Run a specific test file using `npx truffle test test/wormhole.js`
|
|
|
|
Run a specific test file while skipping compile `npx truffle test test/wormhole.js --compile-none`
|
|
|
|
### User methods
|
|
|
|
`submitVAA(bytes vaa)` can be used to execute a VAA.
|
|
|
|
`lockAssets(address asset, uint256 amount, bytes32 recipient, uint8 target_chain)` can be used
|
|
to transfer any ERC20 compliant asset out of ETH to any recipient on another chain that is connected to the Wormhole
|
|
protocol. `asset` is the asset to be transferred, `amount` is the amount to transfer (this must be <= the allowance that
|
|
you have previously given to the bridge smart contract if the token is not a wormhole token), `recipient` is the foreign
|
|
chain address of the recipient, `target_chain` is the id of the chain to transfer to.
|
|
|
|
`lockETH(bytes32 recipient, uint8 target_chain)` is a convenience function to wrap the Ether sent with the function call
|
|
and transfer it as described in `lockAssets`.
|
|
|
|
|
|
### Forge
|
|
|
|
Some tests and scripts use [Foundry](https://getfoundry.sh/). It can be installed via the official installer, or by running
|
|
|
|
``` sh
|
|
wormhole/ethereum $ ../scripts/install-foundry
|
|
```
|
|
|
|
The installer script installs foundry and the appropriate solc version to build the contracts.
|
|
|
|
### Batched VAAs
|
|
|
|
To send a transaction that will create multiple VAAs, invoke the `sendMultipleMessages` method of [ethereum/contracts/mock/MockBatchedVAASender.sol](./contracts/mock/MockBatchedVAASender.sol) with the truffle script:
|
|
|
|
npx truffle exec scripts/send_batched_vaa.js
|
|
|
|
or invoke the same script in the tilt devnet:
|
|
|
|
minikube kubectl -- exec -n wormhole eth-devnet-0 -c tests -- npx truffle exec scripts/send_batched_vaa.js
|