Developer Portal

Begin Your Interchain Journey

Developer Portal

The Interchain is a network of interoperable blockchains built on BFT consensus.

The ever-expanding ecosystem provides an SDK, tokens, wallets, applications, and services. Discover the Cosmos SDK to develop application-specific blockchains.

Ready to begin your journey?

Start Resources

Frequently Asked Questions

FAQ

Is this portal for me?

How should I go through the portal?

What do I need to know?

How long will it take?

All there is to discover

The portal has three different sections, with content to take you through the fundamentals of the Interchain, dive deeper in the tutorials, and apply your conceptual knowledge in the hands-on exercise chapters.

From a high-level overview of the Interchain Ecosystem to the main concepts of the Cosmos SDK and IBC, take a look at these more conceptual introductions to begin your journey.

Work with the full Interchain Stack while developing a checkers game blockchain with Ignite CLI, CosmJS and IBC, and preparing your chain to run in production.

Dive into these tutorials to help get you started and to take a more detailed look at IBC, CosmJS, and some of the other SDK modules. The tutorials walk you through code examples to translate Interchain concepts into practice.

Introduction to the Interchain

Discover the Interchain Ecosystem, Cosmos SDK, and IBC. Feel free to start with the first chapter, or select one or more tags to filter the available content.

DevOps

Cosmos SDK

IBC

CosmJS

CosmWasm

CometBFT

Cosmos Hub

Concept

Tutorial

Guided Coding

Get a fast overview of:

Blockchain technology and the Interchain

The Interchain Ecosystem

Getting ATOM and staking it

This chapter includes an introduction to the main concepts underlying the Interchain Stack and Cosmos SDK:

Blockchain app architecture

Accounts

Transaction, messages, and modules

Protobuf

Multistore and keepers

BaseApp

Queries, events, and context

This chapter will give you an understanding of the Inter-Blockchain Communication Protocol including:

What is IBC?

IBC/TAO - connections, channels, and clients

Light client development

Tutorials

Get started and explore IBC, CosmJS, and Cosmos SDK modules. Feel free to start with the first chapter, or select one or more tags to filter the available content.

DevOps

Cosmos SDK

IBC

CosmJS

CosmWasm

CometBFT

Cosmos Hub

Concept

Tutorial

Guided Coding

From gRPC to Protobuf - a brief overview of dev terms you encounter in the Interchain Ecosystem.

Find out what you should install on your machine to work with the Cosmos SDK and work on the hands-on exercises.

Take your first steps with simapp and get your first node for a Cosmos blockchain running.

Take your first steps with Go to discover the basics, including a look at Go interfaces, structures, arrays, slices, and much more.

Learn enough about Docker so as to conveniently do the hands-on exercises.

Want to become an IBC developer? Take a closer look at IBC denoms.

Want to integrate frontend user interfaces and backend servers with your Cosmos chain? Take a closer look at:

What is CosmJS?

Your first CosmJS actions

Compose complex transactions

Learn to integrate Keplr

Create custom CosmJS interfaces

Discover several tutorials on specific SDK modules:

Prepare your blockchain to run in production:

Run in production

Prepare the software to run

Prepare a validator and keys

Prepare where the node starts

Prepare and connect to other nodes

Configure, run, and set up a service

Prepare and do migrations

Hands-on Exercise

From zero to hero - work with the full Interchain Stack while developing a checkers game blockchain. Feel free to start with the first chapter, or select one or more tags to filter the available content.

DevOps

Cosmos SDK

IBC

CosmJS

CosmWasm

CometBFT

Cosmos Hub

Concept

Tutorial

Guided Coding

Get started with Ignite CLI and begin developing a checkers blockchain:

Introduction to Ignite CLI

First steps for your checkers blockchain

Store object

Create custom messages

Create and save a game

Add a way to make a move

Emit game information

Record the winners

Continue developing your checkers blockchain with Ignite by:

Keep an up-to-date game deadline

Keep track of moves being played

Put your games in order

Enforce auto-expiring of games

Let players set a wager

Handle wager payments

Integration tests

Incentivize players

Help find a correct move

Play with cross-chain tokens

Apply your knowledge of CosmJS to the checkers blockchain exercise. You will:

Create custom objects

Create custom messages

Get an external GUI

Integrate CosmJS and Keplr

Use CosmJS for game indexing

Show your checkers blockchain to investors and progressively the world:

Simulate a production setup with Docker Compose

Tally player info after production

Add a leaderboard as a module

Migrate the leaderboard module after production

Simulate a migration in production with Docker Compose

Test your IBC knowledge by developing your checkers blockchain further:

Go relayer

Hermes relayer

IBC app development introduction

Make a module IBC-enabled

Add packet and acknowledgement data

Extend the checkers game with a leaderboard

Create a leaderboard chain

Developer Resources

Cosmos SDK

A framework for building public blockchains.

Learn more Documentation

CometBFT

Blockchain consensus engine using the Tendermint algorithm.

Learn more Documentation

Ignite CLI

All-in-one platform to build, launch, and maintain apps on a sovereign and secured blockchain.

Learn more Documentation

IBC

Industry standard protocol for inter-blockchain communication.

Learn more Documentation

CosmWasm

Smart contracting platform built for the Interchain Ecosystem.

Learn more Documentation

Cosmos Hub

Software powering Cosmos Hub, the heart of the Interchain network, and home of the ATOM token.

Documentation

Get Cosmos updates

Unsubscribe at any time. Privacy Policy

Documentation

Cosmos SDK Cosmos Hub CometBFT IBC Protocol

Community

Interchain blog Forum Discord

Contributing

Source code on GitHub

Developer Portal

Dark mode

† This website is maintained by the Interchain Foundation (ICF). The contents and opinions of this website are those of the ICF. The ICF provides links to cryptocurrency exchanges as a service to the public. The ICF does not warrant that the information provided by these websites is correct, complete, and up-to-date. The ICF is not responsible for their content and expressly rejects any liability for damages of any kind resulting from the use, reference to, or reliance on any information contained within these websites.

Cosmos is a registered trademark of the Interchain Foundation.Privacy