x/wasm hooks

[jhernandezb]

For a couple of months I've been thinking about a cosmwasm system where there can be namespaces: ability to upload codes to a namespace where they can interact each other but also open permissions to other namespaces you can think of like linux namespaces and a firewall.

First I thought just playing around with a fork but then I think that this could also be achieved if another module had access to hooks like

BeforeInstantiate()
BeforeExecute()
BeforeStore()
BeforeMigrate()

then anx/namespace module can just subscribe to hooks and apply whatever logic.

This is just an idea but not sure if others would find this interesting our useful

[alpe]

Thanks for bringing this topic up. I am happy to see new ideas and use cases rising.
We could replace the keeper instance with an interface in msg_server so that you can play around without the need for a fork for now.

[jhernandezb]

Thanks for bringing this topic up. I am happy to see new ideas and use cases rising. We could replace the keeper instance with an interface in msg_server so that you can play around without the need for a fork for now.

Are intra contract calls routed through msg_server? If so that would help me with exactly what I want

[alpe]

Are intra contract calls routed through msg_server?

yes, you can find all the message handling in https://github.com/CosmWasm/wasmd/blob/v0.44.0/x/wasm/keeper/handler_plugin.go#L54

The wasm keeper has private functions to not mess with the authorization system but we could provide some adapter here to help you out