Begin Your Cosmos Journey

Developer Portal

Cosmos 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?
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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 Cosmos, dive deeper in the tutorials, and apply your conceptual knowledge in the hands-on exercise chapters.
Getting started
Concept

Introduction to Cosmos

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

Hands-on Exercise

Work with the full Cosmo stack while developing a checkers game blockchain with Ignite CLI and preparing your chain to run in production.
Getting started
Tutorial

Tutorials

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 Cosmos concepts into practice.

Introduction to Cosmos

Discover the Cosmos 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
Tendermint
Cosmos Hub
Concept
Tutorial
Guided Coding
Getting started

What is Cosmos?

Get a fast overview of:
Blockchain technology and Cosmos
The Cosmos Ecosystem
How to get ATOM and stake it
Learn more
Getting started

Cosmos Concepts

This chapter includes an introduction to the main concepts underlying Cosmos SDK:
Blockchain app architecture
Accounts
Transaction, messages, and modules
Protobuf
Multistore and keepers
BaseApp
Queries, events, and context
Migrations
Bridges
Learn more
Getting started

Introduction to IBC

This chapter will give you an understanding of the Inter-Blockchain Communication Protocol including:
What is IBC?
Transport, authentication, and ordering layer - connections, channels, and clients
Fungible token transfer
Interchain accounts
IBC tooling
Learn more

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
Tendermint
Cosmos Hub
Concept
Tutorial
Guided Coding
Getting started
Tutorial

Good-to-know dev terms

From gRPC to Protobuf - a brief overview of dev terms you encounter in the Cosmos Ecosystem.
Getting started
Tutorial
DevOps

Set up your work environment

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

Run a node, API, and CLI

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

Golang introduction

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

IBC Developers

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

Introduction to CosmJS

Want to integrate frontend user interfaces and backend servers with you Cosmos chain? Take a closer look at:
What is CosmJS?
Send tokens with CosmJS
Compose complex transactions
Learn to integrate Keplr
Create custom CosmJS interfaces
Learn more
Getting started

Understand SDK modules

Discover several tutorials on specific SDK modules:
The authz module
The feegrant module
The group module
Learn more

Hands-on Exercise

From zero to hero - work with the full Cosmos 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
Tendermint
Cosmos Hub
Concept
Tutorial
Guided Coding
Getting started

Ignite CLI - Basics

Get started with Ignite CLI and begin developing a checkers blockchain:
Introduction to Ignite CLI
First steps for your checkers blockchain
Make a checkers blockchain
Create custom messages
Create and save a game
Add a way to make a move
Emit game information
Make sure a player can reject a game
Learn more
Getting started

Ignite CLI - Advanced

Continue developing your checkers blockchain with Ignite by:
Putting your games in order
Including a game deadline
Recording the winners
Including auto-expiring of games
Allowing wagers
Incentiving players
Help find correct moves
Preparing to move into production
Learn more
Getting started

CosmJS - Advanced

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
Introduce a leaderboard after production
Learn more
Getting started

IBC - Advanced

Test your IBC knowledge by developing your checkers blockchain further:
Play with cross-chain tokens
Relaying with IBC
Go relayer
Hermes relayer
IBC app development
Make a module IBC-enabled
Add packet and Acknowledgement data
IBC middleware
Create custom IBC middleware
Integrate IBC middleware into a chain
Learn more
Getting started

Run in Production

Prepare your checkers blockchain to run in production:
Overview
Prepare the software
Prepare a validator and keys
Prepare the node start
Prepare and connect to other nodes
Configure, run, and set up a service
Prepare and do migrations
Learn more

Articles

Thursday, August 30

Move From Web2 to Web3 in 7 Weeks With the Interchain Developer Academy

4 minutes read
Friday, May 27

The Mind, Body, and Soul of Cosmos.

6 minutes read
Tuesday, June 28

ELI5: What is IBC?

9 minutes read

Developer Resources

Cosmos SDK
Cosmos SDK
A framework for building public blockchains.
Learn moreDocumentation
Tendermint Core
Tendermint Core
Blockchain consensus engine and application interface.
Learn moreDocumentation
Ignite CLI
Ignite CLI
All-in-one platform to build, launch, and maintain apps on a sovereign and secured blockchain.
Learn moreDocumentation
IBC
IBC
Industry standard protocol for inter-blockchain communication.
Learn moreDocumentation
CosmWasm
CosmWasm
Smart contracting platform built for the Cosmos Ecosystem.
Learn moreDocumentation
Cosmos Hub
Cosmos Hub
Software powering Cosmos Hub, the heart of the Cosmos network, and home of the ATOM token.
Documentation

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Source code on GitHub
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