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:

#![allow(unused)]
fn main() {
    counter.upload()?;
    counter.instantiate(&InstantiateMsg { count: 0 }, None, 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.

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 --optional cw-orch

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

[dependencies]
cw-orch = {version = "0.17.0", optional = true } # Latest version at time of writing

Now that we have added cw-orch as an optional dependency we will want to enable it through a feature-flag. This ensures that the code added by cw-orch is not included in the wasm artifact of the contract.

To do this add an interface feature to the Cargo.toml and enable cw-orch when it is enabled like so:

[features]
interface = ["dep:cw-orch"] # Enables cw-orch when the feature is enabled

NOTE: If you are using rust-analyzer, you can add the following two lines in your settings.json to make sure the features get taken into account when checking the project:
 "rust-analyzer.cargo.features": "all",
 "rust-analyzer.check.features": "all",

Creating an Interface

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. Don’t forget to feature-flag the module in order to be able to use cw-orch inside it.

#![allow(unused)]
fn main() {
#[cfg(feature = "interface")]
mod interface;
}

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

#![allow(unused)]
fn main() {
use cw_orch::{interface, prelude::*};

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

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

impl<Chain: CwEnv> Uploadable for CounterContract<Chain> {
    /// Return the path to the wasm file corresponding to the contract
    fn wasm(&self) -> WasmPath {
        artifacts_dir_from_workspace!()
            .find_wasm_path("counter_contract")
            .unwrap()
    }
    /// Returns a CosmWasm contract wrapper
    fn wrapper(&self) -> 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(feature = "interface")]
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:

#![allow(unused)]
fn main() {
#[cw_serde]
#[cfg_attr(feature = "interface", 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]
#[cfg_attr(feature = "interface", 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,
}
}

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):
#[cfg(feature = "interface")]
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, with the interface feature enabled. Depending on your use-case this will be in [dependencies] or [dev-dependencies]:

counter-contract = { path = "../counter-contract", features = ["interface"] }

You can now use:

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

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 rt = Runtime::new()?;
    let network = networks::LOCAL_JUNO;
    let chain = DaemonBuilder::default()
        .handle(rt.handle())
        .chain(network)
        .build()?;


    let counter = CounterContract::new("counter_contract", chain);

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

When using workspaces, you need to do the 2 following actions on all crates that include ExecuteMsg and QueryMsg used in your contracts:

Add cw-orch as an optional dependency
Add an interface feature (ensures cw-orch is not compiled into your wasm contract)

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. Don’t forget to activate the interface feature to be able to use the cw_orch functionalities.

cargo add cw20-base --path ../contracts/cw20-base/ --features=interface
cargo add cw20 --path ../packages/cw20 --features=interface

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