Impersonate accounts on `forge script --broadcast` to Anvil

[ThomasdenH]

Component

Forge

Describe the feature you would like

Anvil currently has the functionality to impersonate accounts (anvil_impersonatingAccount). However, (I think) it's currently impossible to impersonate accounts from forge script. For example, for deploying a contract you may need approval from some existing admin contract. Currently vm.broadcast(adminContractAddress) fails because the contract is not unlocked.

Additional context

No response

[emo-eth]

+1, would be very useful for integration tests that fork mainnet

[Alexintosh]

would be super useful!

[jordaniza]

+1 to keep scripts consistent across tests and forks!

[zaqk]

+1 this would be extremely helpful

[ethanhunsaker]

+1 would love this feature

[mattsse]

sorry for ignoring this for so long.

looks like this is a highly requested feature. I'll add support for this.

[rpedroni]

Extremely useful :)
Current workaround is impersonating through anvil, updating the contract I interact with the script to give my calling pk the required privileges and then running forge

[ZrowGz]

+1 this would be amazing. The impersonate account doesn't quite work as optimally as it could and this would be very powerful for creating functional deployments on anvil. Would be important for the impersonated interactions to be persistent unlike vm.startBroadcast(impersonated-account);