Compile a Rust smart contract module

This guide will show you how to compile smart contract module written in Rust to a Wasm module.

Preparation

Make sure to have Rust and Cargo installed and the wasm32-unknown-unknown target, together with cargo-concordium and the Rust source code for a smart contract module, you wish to compile.

See also

For instructions on how to install the developer tools see Install tools for development.

Compiling to Wasm

To help building smart contract modules and to take advantage of features such as contract schemas, we recommend using the cargo-concordium tool for building Rust smart contracts.

In order to build a smart contract, run:

$cargo concordium build

This uses Cargo for building, but runs further optimizations on the result.

See also

For building the schema for a smart contract module, some further preparation is required.

Note

It is also possible to compile using Cargo directly by running:

$cargo build --target=wasm32-unknown-unknown [--release]

Note that even with --release set, the produced Wasm module includes debug information.