EPF Update 10 - HackMD

--- tags: Ethereum Protocol Fellowship --- # EPF Update 10 ## Summary 1. Review [Vid's pr](https://github.com/Vid201/aa-bundler/pull/28) 2. Add a [new RPC debug_traceCall API pr](https://github.com/foundry-rs/foundry/pull/3990) for [foundry-rs](https://github.com/foundry-rs/foundry) ## Submit a pr to add debug_traceCall API In the Vid's pr, there is a request that the execution client needs `debug_traceCall` api which run the `simulateValidation` before executing the UserOperation. But sadly, the test node Anvil doesn't support the `debug_traceCall` api and it is not a standard exectution api which only [GETH supports](https://geth.ethereum.org/docs/interacting-with-geth/rpc/ns-debug#debug_tracecall) that(There might be some other clients support that.I am not 100% sure.) Because of that, I spend time submitting a [pr](https://github.com/foundry-rs/foundry/pull/3990) to add the API to the anvil node. It is already merged. Hopefully, this could help.