Developer Portal

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

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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.

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.

Work with the full Cosmos stack while developing a checkers game blockchain with Ignite CLI 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 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

Get a fast overview of:

Blockchain technology and Cosmos

The Cosmos Ecosystem

How to get ATOM and stake it

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

Testing

Migrations

Bridges

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

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

From gRPC to Protobuf - a brief overview of dev terms you encounter in the Cosmos 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 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

Discover several tutorials on specific SDK modules:

Prepare your blockchain to run in production:

Overview

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 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

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

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

Including a wager

Handling wager payments

Incentiving players

Help find correct moves

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

Introduce a leaderboard after production

Test your IBC knowledge by developing your checkers blockchain further:

Make a module IBC-enabled

Add packet and acknowledgment data

Extend the checkers game with a leaderboard

Create a leaderboard chain

IBC middleware

Create custom IBC middleware

Integrate IBC middleware into a chain

Developer Resources

Cosmos SDK

A framework for building public blockchains.

Learn more Documentation

Tendermint Core

Blockchain consensus engine and application interface.

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 Cosmos Ecosystem.

Learn more Documentation

Cosmos Hub

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

Documentation

Get Cosmos updates

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Documentation

Cosmos SDK Cosmos Hub Tendermint Core IBC Protocol

Community

Cosmos blog Forum Discord

Contributing

Source code on GitHub

Developer Portal

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