Proof of concept to explore and benchmark how to deposit funds from a CEX to a L2 wallet without the need to have a L1 wallet.
Combines ideas from:
- https://github.com/ricmoo/will-o-the-wisp
- https://github.com/0age/metamorphic
- https://github.com/optionality/clone-factory
We consider 3 options:
The permanent forwarder:
- The counterfactual address of a forwarder is obtained by calling
factory.getForwarder(_wallet) - The forwarder is a minimal-proxy delegating to a fixed implementation (EIP 1167)
- The forwarder is deployed separately after the first deposit by calling
factory.deployForwarder(_wallet) - For each deposit the funds can be forwarded by calling the
forwarder.forward(_token) - deployment: 90709 gas, forward ETH: 30814 gas
The transient forwarder:
- The counterfactual address of a forwarder is obtained by calling
factory.getForwarder(_wallet) - The forwarder is a minimal-proxy delegating to a fixed implementation (EIP 1167)
- For each deposit the forwarder is deployed, the funds are forwarded and the forwarder is destructed in a single transaction by calling
factory.forward(_wallet, _token) - forward ETH: 58901 gas
The flexible forwarder:
- The counterfactual address of a forwarder is obtained by calling
factory.getForwarder(_wallet) - The forwarder can have a different implementation on every transaction and e.g. target a different L2
- For each deposit the forwarder is deployed, the funds are forwarded and the forwarder is destructed in a single transaction by calling
factory.forward(_wallet, _token) - forward ETH: 115708 gas
NOTE: If needed the transient forwarder and flexible forwarder patterns can be combined to enable 1 forwarder address per user capable to forward funds to multiple L2 at reduced cost.