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Ignite and Scaffolding the Wordle Chain


Ignite is an amazing CLI tool to help us get started building our own blockchains for cosmos-sdk apps. It provides lots of power toolings and scaffoldings for adding messages, types, and modules with a host of cosmos-sdk libraries provided.

You can read more about Ignite here.

To install Ignite, you can run this command in your terminal:

curl | bash
sudo mv ignite /usr/local/bin/

This installs Ignite CLI in your local machine. This tutorial uses a MacOS but it should work for Windows. For Windows users, check out the Ignite docs on installation for Windows machines.

Now, refresh your terminal using source or open a new terminal session for the change to take place.

If you run the following:

ignite --help

You should see an output of help commands meaning Ignite was installed successfully!

Scaffolding the Wordle Chain

Now, comes the fun part, creating a new blockchain! With Ignite, the process is pretty easy and straightforward.

Ignite CLI comes with several scaffolding commands that are designed to make development more straightforward by creating everything you need to build your blockchain.

First, we will use Ignite CLI to build the foundation of a fresh Cosmos SDK blockchain. Ignite minimizes how much blockchain code you must write yourself. If you are coming from the EVM-world, think of Ignite as a Cosmos-SDK version of Foundry or Hardhat but specifically designed to build blockchains.

We first run the following command to setup our project for our new blockchain, Wordle.

ignite scaffold chain --no-module

This command scaffolds a new chain directory called wordle in your local directory from which you ran the command. Notice that we passed the --no-module flag, this is because we will be creating the module after.

Wordle Directory

Now, it’s time to enter the directory:

cd wordle

Inside you will see several directories and architecture for your cosmos-sdk blockchain.

app/Files that wire together the blockchain. The most important file is app.go that contains type definition of the blockchain and functions to create and initialize it.
cmd/The main package responsible for the CLI of compiled binary.
docs/Directory for project documentation. By default, an OpenAPI spec is generated.
proto/Protocol buffer files describing the data structure.
testutil/Helper functions for testing.
vue/A Vue 3 web app template.
x/Cosmos SDK modules and custom modules.
config.ymlA configuration file for customizing a chain in development.
readme.mdA readme file for your sovereign application-specific blockchain project.

Going over each one is outside the scope of this guide, but we encourage you to read about it here.

Most of the tutorial work will happen inside the x directory.