DEX Aggregator based on LayerZero Cross-Chain Communication

This project is a DEX aggregator and SDK that leverages LayerZero's cross-chain communication capabilities to enable swapping of tokens across multiple chains using preferred synth routes.

Overview

The core swap process consists of three components:

1. Swap into the synthetic asset (syAsset) on the source chain
2. Cross-chain or same-chain SYNTH SWAP
3. Swap out of the synthetic asset on the destination chain

Components

The project consists of two main smart contracts:

1. SourceChainUA.sol - Handles the swap on the source chain, converting the input token into its synthetic counterpart (syAsset).
2. DestinationChainUA.sol - Handles the swap on the destination chain, converting the synthetic asset back into the desired token.

Both contracts inherit from NonblockingLzApp, which facilitates cross-chain communication using LayerZero.

Cross-chain communication

The cross-chain communication is handled using LayerZero's _lzSend and _nonblockingLzReceive functions, enabling the swap to be executed across different blockchains seamlessly.

Setup

1. Install dependencies:

npm install

2. Compile the smart contracts:

npx hardhat compile

3. Run tests (if any):

npx hardhat test

Deployment

1. Modify the hardhat.config.js file with the appropriate network configurations and API keys.

2. Deploy the contracts using Hardhat:

npx hardhat run --network <network_name> scripts/deploy.js

Usage

To interact with the deployed contracts, you can use any Ethereum-compatible library (e.g., Web3.js or Ethers.js).

1. Connect to the appropriate network using a provider (e.g., MetaMask or Infura).

2. Create a contract instance for both SourceChainUA and DestinationChainUA using their respective ABI and deployed addresses.

3. Call the swapToSyAsset function in the SourceChainUA contract to initiate the swap on the source chain.

4. Call the crossChainSwap function in the SourceChainUA contract to send cross-chain messages.

5. The _nonblockingLzReceive function in the DestinationChainUA contract will automatically handle the received message, and the contract will initiate the swap on the destination chain.

6. Call the swapSyAssetToBaseAsset function in the DestinationChainUA contract to complete the swap process on the destination chain.

License

This project is licensed under the MIT License.