Quick-Start Guide

Get ready to change the way you interact with contracts. The following steps will allow you to write clean code such as:

    counter.upload()?;
    counter.instantiate(&InstantiateMsg { count: 0 }, None, &[])?;

    counter.increment()?;

    let count = counter.get_count()?;
    assert_eq!(count.count, 1);

In this quick-start guide, we will review the necessary steps in order to integrate cw-orch into a simple contract crate. We review integration of rust-workspaces (multiple contracts) at the end of this page.

NOTE: Additional content

If you’re moving quicker than everybody else, we suggest looking at a before-after review of this example integration. This will help you catch the additions you need to make to your contract to be able to interact with it using cw-orchestrator.

Video Workshop

If you prefer watching a video, you can follow the workshop below:

Single Contract Integration

Adding `cw-orch` to your `Cargo.toml` file

To use cw-orchestrator, you need to add cw-orch to your contract’s TOML file. Run the command below in your contract’s directory:

cargo add cw-orch

Alternatively, you can add it manually in your Cargo.toml file as shown below:

[dependencies]
cw-orch = {version = "0.21.2" } # Latest version at time of writing

NOTE: Even if you include cw-orch in your dependencies here, it won’t be included in your wasm contract. Learn more about this behavior in the section about Wasm Compilation

When using a single contract, we advise creating an interface.rs file inside your contract’s directory. You then need to add this module to your lib.rs file. This file should not be included inside you final wasm. In order to do that, you need to add #[cfg(not(target_arch = "wasm32"))] when importing the file.

#[cfg(not(target_arch = "wasm32"))]
mod interface;

Then, inside that interface.rs file, you can define the interface for your contract:

use cw_orch::{interface, prelude::*};

use crate::msg::{ExecuteMsg, InstantiateMsg, MigrateMsg, QueryMsg};

pub const CONTRACT_ID: &str = "counter_contract";

#[interface(InstantiateMsg, ExecuteMsg, QueryMsg, MigrateMsg, id = CONTRACT_ID)]
pub struct CounterContract;

impl<Chain> Uploadable for CounterContract<Chain> {
    /// Return the path to the wasm file corresponding to the contract
    fn wasm(_chain: &ChainInfoOwned) -> WasmPath {
        artifacts_dir_from_workspace!()
            .find_wasm_path("counter_contract")
            .unwrap()
    }
    /// Returns a CosmWasm contract wrapper
    fn wrapper() -> Box<dyn MockContract<Empty>> {
        Box::new(
            ContractWrapper::new_with_empty(
                crate::contract::execute,
                crate::contract::instantiate,
                crate::contract::query,
            )
            .with_migrate(crate::contract::migrate),
        )
    }
}

Learn more about the content of the interface creation specifics on the interface page

NOTE: It can be useful to re-export this struct to simplify usage (in lib.rs):
#[cfg(not(target_arch = "wasm32"))]
pub use crate::interface::CounterContract;

Interaction helpers

cw-orchestrator provides a additional macros that simplify contract calls and queries. The macro implements functions on the interface for each variant of the contract’s ExecuteMsg and QueryMsg.

Enabling this functionality is very straightforward. Find your ExecuteMsg and QueryMsg definitions (in msg.rs in our example) and add the ExecuteFns and QueryFns derive macros to them like below:

#[cw_serde]
#[derive(cw_orch::ExecuteFns)] // Function generation
/// Execute methods for counter
pub enum ExecuteMsg {
    /// Increment count by one
    Increment {},
    /// Reset count
    Reset {
        /// Count value after reset
        count: i32,
    },
}

#[cw_serde]
#[derive(cw_orch::QueryFns)] // Function generation
#[derive(QueryResponses)]
/// Query methods for counter
pub enum QueryMsg {
    /// GetCount returns the current count as a json-encoded number
    #[returns(GetCountResponse)]
    GetCount {},
}

// Custom response for the query
#[cw_serde]
/// Response from get_count query
pub struct GetCountResponse {
    /// Current count in the state
    pub count: i32,
}

Make sure to derive the #[derive(cosmwasm_schema::QueryResponses)] macro on your query messages !

Find out more about the interaction helpers on the interface page

NOTE: Again, it can be useful to re-export these generated traits to simplify usage (in lib.rs):
pub use crate::msg::{ExecuteMsgFns as CounterExecuteMsgFns, QueryMsgFns as CounterQueryMsgFns};

Using the integration

Now that all the setup is done, you can use your contract in tests, integration-tests or scripts.

Start by importing your crate, in your [dev-dependencies] for instance:

counter-contract = { path = "../counter-contract"}

You can now use:

use counter_contract::{
    msg::InstantiateMsg, CounterContract, CounterExecuteMsgFns, CounterQueryMsgFns,
};
use cw_orch::{anyhow, prelude::*};

// From https://github.com/CosmosContracts/juno/blob/32568dba828ff7783aea8cb5bb4b8b5832888255/docker/test-user.env#L2
const LOCAL_MNEMONIC: &str = "clip hire initial neck maid actor venue client foam budget lock catalog sweet steak waste crater broccoli pipe steak sister coyote moment obvious choose";
pub fn main() -> anyhow::Result<()> {
    std::env::set_var("LOCAL_MNEMONIC", LOCAL_MNEMONIC);
    dotenv::dotenv().ok(); // Used to load the `.env` file if any
    pretty_env_logger::init(); // Used to log contract and chain interactions

    let network = networks::LOCAL_JUNO;
    let chain = DaemonBuilder::new(network).build()?;

    let counter = CounterContract::new(chain);

    counter.upload()?;
    counter.instantiate(&InstantiateMsg { count: 0 }, None, &[])?;

    counter.increment()?;

    let count = counter.get_count()?;
    assert_eq!(count.count, 1);

    Ok(())
}

Integration in a workspace

In this paragraph, we will use the cw-plus repository as an example. You can review:

The full integration code with cw-orch added
The complete diff that shows you all integration spots (if you want to go fast)

Handling dependencies

When using workspaces, you need to add cw-orch as a dependency on all crates that include ExecuteMsg and QueryMsg used in your contracts. You then add the #[derive(ExecuteFns)] and #[derive(QueryFns)] macros to those messages.

Refer above to Adding cw-orch to your Cargo.toml file for more details on how to do that.

For instance, for the cw20_base contract, you need to execute those 2 steps on the cw20-base contract (where the QueryMsg are defined) as well as on the cw20 package (where the ExecuteMsg are defined).

Creating an interface crate

When using workspace, we advise you to create a new crate inside your workspace for defining your contract’s interfaces. In order to do that, use:

cargo new interface --lib
cargo add cw-orch --package interface

Add the interface package to your workspace Cargo.toml file

[workspace]
members = ["packages/*", "contracts/*", "interface"]

Inside this interface crate, we advise to integrate all your contracts 1 by 1 in separate files. Here is the structure of the cw-plus integration for reference:

interface (interface collection)
├── Cargo.toml
└── src
    ├── cw1_subkeys.rs
    ├── cw1_whitelist.rs
    ├── cw20_base.rs
    ├── cw20_ics20.rs
    └── ..

When importing your crates to get the messages types, you can use the following command in the interface folder.

cargo add cw20-base --path ../contracts/cw20-base/
cargo add cw20 --path ../packages/cw20

Integrating single contracts

Now that you workspace is setup, you can integrate with single contracts using the above section

More examples and scripts

You can find more example interactions on the counter-contract example directly in the cw-orchestrator repo:

Some examples showcase interacting with live chains.
Some other examples show how to use the library for testing your contracts.

FINAL ADVICE: Continue to explore those docs to learn more about cw-orch. Why not go directly to environment variables?

cw-orchestrator documentation