Install Prerequisites
In this section, we will set up our machine and install the prerequisites for developing, deploying and interacting with smart contracts on MANTRA Chain.
Go
You can set up Go following the official documentation. The latest versions of mantrachaind require go version v1.18+.
Rust
Assuming you have never worked with Rust, you will first need to install some tooling.
The standard approach is to use rustup to maintain dependencies and handle updating multiple versions of cargo and rustc, which you will be using.
Installing Rust in Linux and Mac
First, install rustup. Once installed, make sure you have the wasm32 target:
wasm32-unknown-unknown states the target specification, and is called "target triple" consisting of three strings separated by hyphens.
Strings represent architecture, vendor, and operating system respectively. unknown means there is no specifications for the target and the application is more flexible.
Read the rust docs for a more detailed explanation.
Installing Rust in Windows 10
First, download and execute rustup-init.exe from rustup.rs or rust-lang.org.
If requested, manually download and install Visual C++ Build Tools 2019, from https://visualstudio.microsoft.com/visual-cpp-build-tools/ . Make sure "Windows 10 SDK" and "English language pack" are selected.
Continue running rustup-init.exe, and proceed with the installation.
Optionally:
Download and install gvim, and modify the environment variables to add \<gvim folder> to the PATH.
Download and install git for windows. Modify the environment variables to add \<git folder>\bin to PATH.
Turn on Developer Mode (Settings -> Update and Security: For Developers) and enable Device Discovery, to be able to access the Windows 10 server through ssh (https://www.ctrl.blog/entry/how-to-win10-ssh-service.html#section-mssshserv-enabl).
Install the wasm32 target:
Docker
Docker is essential for setting up and running applications in isolated environments. You can install Docker by following the instructions on the official Docker website for your respective operating system. If you are a Windows user, make sure to activate the WSL integration in Docker Desktop settings.
Install cargo-generate package
Cargo-generate is a command-line tool used in Rust programming for generating new Rust projects from predefined templates. It allows developers to quickly set up a new project with a specific structure, dependencies, and configuration.
mantrachaind
mantrachaind is the backbone of the CosmWasm platform for MANTRA Hongbai Chain. During Testnet Phase 2 the binary is pre-built for both Linux and MacOS clients.
You can find all the pre-built binaries on the MANTRA GitHub Repo.
On Linux:
On MacOS:
You should see the following output, or similar, after executing the mantrachaind command.
if you receive the following error: mantrachaind: error while loading shared libraries: libwasmvm.x86_64.so: cannot open shared object file: No such file or directory you will need to install the CosmWasm library libwasmvm.x86_64.so (see below).
Install CosmWasm library
More information can be found in here: https://github.com/CosmWasm/wasmvm
If you are on a x86_64 system:
On arm64 (i.e. Apple silicon chips):
Setting up jq
jq is a lightweight and flexible command-line JSON processor. It helps us to slice and filter and map and transform structured JSON data.
Installation will vary depending on your operating system (i.e. Linux, MacOS or Windows).
Linux (Ubuntu / Debian):
MacOS:
Windows:
Alternatively, see the 'Download jq' site for other options.
Git
Git is a free and open-source version control system that allows you to track changes made to code, collaborate with others, and maintain different versions of your project. It's primarily used for source code management, but it can be used to track changes in any set of files.
Linux (Ubuntu / Debian):
MacOS:
Windows:
Go to the official Git download page and download the latest version of Git for Windows.
Setting up your IDE
We will need a good IDE for developing smart contracts with Rust. The following development environments are highly recommended and coupling them with the corresponding Rust plugins will help you learn the syntax, especially if you have no prior experience.
VSCode offers great support for Rust, especially when coupled with the rust-analyzer extension. This extension makes use of the rust compiler to type-check all your code as you save. This gives the same error messages as the actual compiler would and highlights the errors, but it can be a bit slow to respond (as it runs the compiler). It is a solid option, particularly if you are used to VSCode.
Another option is RustRover, Jetbrains’ IDE specifically designed for Rust development. It offers a robust suite of features to streamline the development process, including intelligent code completion, real-time error detection, and powerful refactoring tools. RustRover enhances productivity with its customizable interface, seamless integration with version control systems, and comprehensive debugging capabilities. It is highly recommended, more so, if you are coming from another Jetbrain product (eg. Goland).
There are other editors out there with varying degrees of Rust support. However, unless you have a strong preference for another editor (e.g., Sublime, Emacs, Vim) , trying one of the two above is recommended, especially if you are new to Rust. Once you are confident in the language, you can always use another editor and customize it to your liking.
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