ethers.js doesn't yet support parsing anonymous events: https://github.com/ethers-io/ethers.js/blob/master/packages/abi/lib.esm/interface.js#L466 <img width="978" alt="Screen Shot 2563-11-02 at 23 51 07" src="https://user-images.githubusercontent.com/930603/97895374-4798d480-1d66-11eb-855c-27bc87fd9d4c.png"> Ask in their support group how it can be done with ethers.js.