Hi all! I’m Brendan from PoolTogether. We also had a need for a chain-agnostic bridging standard. We didn’t want to write bespoke code for every single bridge, so we worked with others to design an ERC to standardize the call structure.
ERC-5164: Cross-Chain Execution was developed in partnership with Hop Protocol and others. This ERC is designed to be a bridge-agnostic standard for communicating with smart contracts across bridges.
PoolTogether has written ERC-5164 wrappers for:
- Optimism
- Arbitrum
- Polygon
The implementation was audited by C4. Check out pooltogether/ERC5164 on Github.
Hop Protocol V2 will be launching soon and will include ERC-5164 messaging. I believe V2 will support messaging between 15 different chains. Binance Smart Chain may be one of them; but I don’t know. Edit: I’ll ping the team
No matter what cross-chain execution solution Uniswap opts for, it would be great for us to rally around ERC-5164 so that we can leverage each other’s efforts and avoid vendor lock-in. Ideally the Uniswap engineers or bridges can build ERC-5164 adapters.