Which contract does the swap of bex (https://artio.bex.berachain.com/) correspond to?

I have tried IDexModule.abi.json and IERC20DexModule.abi.json, but I always get an error when I interact with them using ethers.js. In fact, the batchSwap method does not match the information displayed on the blockchain explorer. This is confusing me.
Is there any simple demo for interacting with bex using ethers.js please?