The L2Bridge is a cross-layer-2 protocol that provides asset transfer between existing L2 networks. The main idea is based on Vitalik's idea in https://notes.ethereum.org/@vbuterin/cross_layer_2_bridges and further illustrated at https://medium.com/@qizhou_63115/cross-l2-bridge-hashed-timelock-contract-vs-delayed-proved-timelock-contract-7e738dd2094e.
The main features of the bridges are:
- Almost instant user asset transfer;
- Single user operation (compared to two-step operations in HTLC);
- Does not rely on additional security assumption (e.g., 3rd party), i.e., only assuming L1/L2 security;
- No off-chain LP matching (instead, using a reverse fee auction).
L2BridgeSource.sol: source bridge for user to deposit the source token and for LP to withdraw the source tokenL2BridgeDestination.sol: destination bridge for LP to buy user's source tokenOptimismL1Bridge.sol: Layer1 bridge that sync the status between source and destination bridge on Layer 2
| Name | Address |
|---|---|
| L1 Bridge | 0x34Fb74842eFd8f43EaB03DE3c713868D0ba6dC0c |
| Name | Address |
|---|---|
| L2 Source Bridge | 0x524867916F136b56083b7b1F071d228361A6600E |
| L2 Destination Bridge | 0x0AD853E840cCa279F24c59698751aD2635E5c533 |
| L2 Source Token (USDC) | 0xF495b9DE9143e9CB81087880d089aA161Bb6B82B |
| L2 Destination Token (USDT) | 0x352ad2db4b7695B2919e0926FF7659FEa16d7f5C |
You can deploy and run the app locally, or reuse the contracts and app with the demo. You can mint the Source and Destination token from the contract for test.