[Research] prost on osmosis proto

[iboss-ptk]

Generate rust types from osmosis proto to create StargateMsg for cosmwasm to call osmosis specific stuffs

• copy/paste the generated type and test with StargateMsg

[iboss-ptk]

Working examaple

// >> Msg definition

/// MsgCreateDenom is the sdk.Msg type for allowing an account to create
/// a new denom. It requires a sender address and a subdenomination.
/// The (sender_address, sub_denomination) pair must be unique and cannot be
/// re-used. The resulting denom created is `factory/{creator
/// address}/{subdenom}`. The resultant denom's admin is originally set to be the
/// creator, but this can be changed later. The token denom does not indicate the
/// current admin.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct MsgCreateDenom {
    #[prost(string, tag = "1")]
    pub sender: ::prost::alloc::string::String,
    /// subdenom can be up to 44 "alphanumeric" characters long.
    #[prost(string, tag = "2")]
    pub subdenom: ::prost::alloc::string::String,
}

// >> Extention for conversion
// maybe deriving / code gen `impl From<prost::Message> for CosmosMsg::Stargate` instead

pub trait MessageExt: prost::Message {
    /// Serialize this protobuf message as a byte vector.
    fn to_bytes(&self) -> Result<cosmwasm_std::Binary, ContractError>;
}

impl<M> MessageExt for M
where
    M: prost::Message,
{
    fn to_binary(&self) -> Result<cosmwasm_std::Binary, From<Box<dyn Error>>> {
        let mut bytes = Vec::new();
        prost::Message::encode(self, &mut bytes)?

        Ok(cosmwasm_std::Binary(bytes))
    }
}


let msg = CosmosMsg::Stargate {
    type_url: "/osmosis.tokenfactory.v1beta1.MsgCreateDenom".to_string(),
    value: MsgCreateDenom {
        sender: contract_addr,
        subdenom,
    }
    .to_binary()?,
}

[nicolaslara]

I've had issues getting prost types deployed on the chains as they depend on floats (which aren't supported by the wasmvm because of indeterminism). When I tried something similar to this, it worked on the tests but not the real chains.

@iboss-ptk is there something I'm missing here? Are you using any specific compilation flags?

[iboss-ptk]

@nicolaslara I have tested it on LocalOsmosis, it does not complain anything about nondeterminism and there is no specific compiler flags. Do you have the code, I might miss something and cause problems later so I would like to see it. Here is my working example

https://github.com/iboss-ptk/osmosis-cosmwasm-stargate-example

[nicolaslara]

I had tried something similar on Juno, but I'll try a version of your working example to see what my issue was. If this all works, I can use it to build a simple API for https://github.com/osmosis-labs/bindings

[nicolaslara]

Reviewed this now. The non-determinism issue I mentioned was not related to this. That happened because I was also using serde_json as a workaround when the StargateQuery didn't work (I tried this a few months ago, so didn't remember the details).

And the reason the StargateQuery was failing on juno is because (duh) StargateQueries are disabled on juno 🤦. I just didn't see the proper error until now because CosmWasm/cosmwasm#1299 didn't exist when I tried this last time.

Anyway. This all seems to work :) Now the fun part (of making protos easy to use for cosmwasm devs) starts. Thanks for all the good work @iboss-ptk !

[iboss-ptk]

Thanks for your kind words @nicolaslara !