Developer Portal
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Developer Portal
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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?
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Frequently Asked Questions

FAQ

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How should I go through the portal?
What do I need to know?
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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.
Getting started
Concept

Introduction to the Interchain

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.
Getting started
Guided Coding

Hands-on Exercise

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.
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 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
Getting started

What is the Interchain?

Get a fast overview of:
Blockchain technology and the Interchain
The Interchain Ecosystem
Getting ATOM and staking it
Learn more
Getting started

Interchain Concepts

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
Testing
Relaying with IBC
Interchain Security
Bridges
Migrations
Learn more
Getting started

Introduction to IBC

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
Solo machine client
IBC token transfer
Interchain accounts
IBC middleware
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
CometBFT
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 Interchain 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

Docker introduction

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

Understand SDK modules

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

The Path to Production

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
Learn more

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
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
Store object
Create custom messages
Create and save a game
Add a way to make a move
Emit game information
Record the winners
Learn more
Getting started

Ignite CLI - Advanced

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
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
Learn more
Getting started

From Code to MVP to Production

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
Learn more
Getting started

IBC - Advanced

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
Learn more

Articles

Sunday, June 4

How-to Cosmos Pt. 4- Building your first application with CosmJS

8 minutes read
Friday, May 27

The Mind, Body, and Soul of Cosmos.

6 minutes read
Tuesday, Nov 15

ELI5: What is IBC?

7 minutes read

Developer Resources

Cosmos SDK
Cosmos SDK
A framework for building public blockchains.
Learn moreDocumentation
CometBFT
CometBFT
Blockchain consensus engine using the Tendermint algorithm.
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 Interchain Ecosystem.
Learn moreDocumentation
Cosmos Hub
Cosmos Hub
Software powering Cosmos Hub, the heart of the Interchain network, and home of the ATOM token.
Documentation

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