Discover cosmos/sdk-tutorials Open Source project by COSMOS (@cosmos)

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Cosmos SDK

A framework for building public blockchains.

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Learn more	https://v1.cosmos.network/sdk

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Documentation	https://docs.cosmos.network/

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CometBFT

Blockchain consensus engine using the Tendermint algorithm.

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Learn more	https://docs.cometbft.com/v0.37/

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Documentation	https://docs.cometbft.com/v0.37/core/

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Ignite CLI

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

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Learn more	https://ignite.com/cli

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Documentation	https://docs.ignite.com

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IBC

Industry standard protocol for inter-blockchain communication.

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Learn more	https://ibcprotocol.org/

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Documentation	https://ibc.cosmos.network/

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CosmWasm

Smart contracting platform built for the Interchain Ecosystem.

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Learn more	https://cosmwasm.com/

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Documentation	https://docs.cosmwasm.com/docs

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Cosmos Hub

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

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Documentation	https://hub.cosmos.network/

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Move From Web2 to Web3 in 7 Weeks With the Interchain Developer Academy	Thursday, August 30	4	https://blog.cosmos.network/join-the-interchain-developer-academy-and-master-cosmos-in-7-weeks-e28a47896e0f	/article-banner-02.png

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The Mind, Body, and Soul of Cosmos.	Friday, May 27	6	https://blog.cosmos.network/the-mind-body-and-soul-of-cosmos-140ee7cec0cd	/article-banner-01.png

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ELI5: What is IBC?	Tuesday, Nov 15	7	https://medium.com/the-interchain-foundation/eli5-what-is-ibc-def44d7b5b4c	/article-banner-04.jpg

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Begin Your Interchain Journey

Developer Portal

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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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Start	/academy/1-what-is-cosmos/index.html

This is a beta version of the Developer Portal that will help you take your first steps with the Cosmos SDK. We would be grateful for your feedback. At the end of each are three icons to rate the page and a small box where you can give us feedback about things to improve. Enjoy your journey through the portal and good luck with the HackAtom!

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Frequently Asked Questions

FAQ

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Is this portal for me?	This portal offers an overview of the Interchain Stack (the Cosmos SDK, Ignite, CosmJS, etc.), as well as examples and exercises to help developers get a quick start.

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How should I go through the portal?

The portal content unfolds the Interchain universe, beginning with a big-picture perspective and getting into how to create your application-specific blockchain with the Cosmos SDK. The introductory chapters give you a solid overview of the Cosmos SDK, its concepts, and dApps built on the Interchain Stack, while the hands-on exercises put theory into practice – showcasing how to address application concerns when developing such as managing gas fees, working with Ignite CLI, running a node, and making a chain IBC-enabled. A look into all chapters is recommended, as a basic understanding helps when things get tricky. You can follow your own path or go through the content chronologically. To follow your own path, select the tags for the subjects you are interested in and all the chapters and sections relating to that subject will be displayed. Additionally, you can select a version of the portal if you want to explore the content in a specific Interchain Stack version. For more information on which stack version is used in the different versions of the portal, please <a href="/versions.html">go to the page on Platform Versions</a>. In general, we do recommend using the most current version.

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What do I need to know?	For the conceptual, high-level sections, you should have a solid understanding of blockchain technology and be familiar with decentralized applications. The deep dives are specially designed for experienced developers.

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How long will it take?	With the concept sections, you will gain a solid understanding of Cosmos and the Interchain Stack. This might be a matter of just a couple of hours. The time you spend on the other chapters and the hands-on exercise depends on you – there are endless possibilities to discover. <br/><br/> Welcome to the Interchain!

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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.

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Blockchain app architecture

/academy/2-cosmos-concepts/1-architecture.html

concepts

cometbft

cosmos-sdk

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Accounts	/academy/2-cosmos-concepts/2-accounts.html

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Transaction, messages, and modules	/academy/2-cosmos-concepts/3-transactions.html

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Protobuf	/academy/2-cosmos-concepts/6-protobuf.html

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Multistore and keepers	/academy/2-cosmos-concepts/7-multistore-keepers.html

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BaseApp	/academy/2-cosmos-concepts/8-base-app.html

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Queries, events, and context	/academy/2-cosmos-concepts/9-queries.html

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Testing	/academy/2-cosmos-concepts/12-testing.html

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Relaying with IBC	/academy/2-cosmos-concepts/13-relayer-intro.html

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Interchain Security	/academy/2-cosmos-concepts/14-interchain-security.html

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Bridges	/academy/2-cosmos-concepts/15-bridges.html

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Migrations	/academy/2-cosmos-concepts/16-migrations.html

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Introduction to IBC

/academy/3-ibc/

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

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What is IBC?	/academy/3-ibc/1-what-is-ibc.html

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IBC/TAO - connections, channels, and clients	/academy/3-ibc/2-connections.html

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Light client development	/academy/3-ibc/5-light-client-dev.html

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Solo machine client	/academy/3-ibc/6-solomachine.html

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IBC token transfer	/academy/3-ibc/7-token-transfer.html

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Interchain accounts	/academy/3-ibc/8-ica.html

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IBC middleware	/academy/3-ibc/9-ibc-mw-intro.html

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IBC tooling	/academy/3-ibc/12-ibc-tooling.html

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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.

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	Good-to-know dev terms	/tutorials/1-tech-terms/	From gRPC to Protobuf - a brief overview of dev terms you encounter in the Interchain Ecosystem.

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	Set up your work environment	/tutorials/2-setup/	Find out what you should install on your machine to work with the Cosmos SDK and work on the hands-on exercises.

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	Run a node, API, and CLI	/tutorials/3-run-node/	Take your first steps with simapp and get your first node for a Cosmos blockchain running.

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	Golang introduction	/tutorials/4-golang-intro/	Take your first steps with Go to discover the basics, including a look at Go interfaces, structures, arrays, slices, and much more.

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	Docker introduction	/tutorials/5-docker-intro/	Learn enough about Docker so as to conveniently do the hands-on exercises.

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	IBC developers	/tutorials/6-ibc-dev/	Want to become an IBC developer? Take a closer look at IBC denoms.

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Introduction to CosmJS

/tutorials/7-cosmjs/

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

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What is CosmJS?	/tutorials/7-cosmjs/1-cosmjs-intro.html

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Your first CosmJS actions	/tutorials/7-cosmjs/2-first-steps.html

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Compose complex transactions	/tutorials/7-cosmjs/3-multi-msg.html

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Learn to integrate Keplr	/tutorials/7-cosmjs/4-with-keplr.html

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Create custom CosmJS interfaces	/tutorials/7-cosmjs/5-create-custom.html

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Understand SDK modules

/tutorials/8-understand-sdk-modules/

Discover several tutorials on specific SDK modules:

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The authz module	/tutorials/8-understand-sdk-modules/1-authz.html

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The feegrant module	/tutorials/8-understand-sdk-modules/2-feegrant.html

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The group module	/tutorials/8-understand-sdk-modules/3-group.html

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The gov module	/tutorials/8-understand-sdk-modules/4-gov.html

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The Path to Production

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Prepare your blockchain to run in production:

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Run in production	/tutorials/9-path-to-prod/1-overview.html

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Prepare the software to run	/tutorials/9-path-to-prod/2-software.html

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Prepare a validator and keys	/tutorials/9-path-to-prod/3-keys.html

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Prepare where the node starts	/tutorials/9-path-to-prod/4-genesis.html

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Prepare and connect to other nodes	/tutorials/9-path-to-prod/5-network.html

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Configure, run, and set up a service	/tutorials/9-path-to-prod/6-run.html

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Prepare and do migrations	/tutorials/9-path-to-prod/7-migration.html

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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.

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Ignite CLI - Basics

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

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Introduction to Ignite CLI	/hands-on-exercise/1-ignite-cli/1-ignitecli.html

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First steps for your checkers blockchain	/hands-on-exercise/1-ignite-cli/2-exercise-intro.html

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Store object	/hands-on-exercise/1-ignite-cli/3-stored-game.html

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Create custom messages	/hands-on-exercise/1-ignite-cli/4-create-message.html

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Create and save a game	/hands-on-exercise/1-ignite-cli/5-create-handling.html

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Add a way to make a move	/hands-on-exercise/1-ignite-cli/6-play-game.html

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Emit game information	/hands-on-exercise/1-ignite-cli/7-events.html

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Record the winners	/hands-on-exercise/1-ignite-cli/8-game-winner.html

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Ignite CLI - Advanced

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Continue developing your checkers blockchain with Ignite by:

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Keep an up-to-date game deadline	/hands-on-exercise/2-ignite-cli-adv/1-game-deadline.html

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Keep track of moves being played	/hands-on-exercise/2-ignite-cli-adv/2-move-count.html

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Put your games in order	/hands-on-exercise/2-ignite-cli-adv/3-game-fifo.html

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Enforce auto-expiring of games	/hands-on-exercise/2-ignite-cli-adv/4-game-forfeit.html

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Let players set a wager	/hands-on-exercise/2-ignite-cli-adv/5-game-wager.html

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Handle wager payments	/hands-on-exercise/2-ignite-cli-adv/6-payment-winning.html

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Integration tests	/hands-on-exercise/2-ignite-cli-adv/7-integration-tests.html

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Incentivize players	/hands-on-exercise/2-ignite-cli-adv/8-gas-meter.html

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Help find a correct move	/hands-on-exercise/2-ignite-cli-adv/9-can-play.html

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Play with cross-chain tokens	hands-on-exercise/2-ignite-cli-adv/10-wager-denom.html

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CosmJS - Advanced

/hands-on-exercise/3-cosmjs-adv/

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

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Create custom objects	/hands-on-exercise/3-cosmjs-adv/1-cosmjs-objects.html

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Create custom messages	/hands-on-exercise/3-cosmjs-adv/2-cosmjs-messages.html

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Get an external GUI	/hands-on-exercise/3-cosmjs-adv/3-external-gui.html

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Integrate CosmJS and Keplr	/hands-on-exercise/3-cosmjs-adv/4-cosmjs-gui.html

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Use CosmJS for game indexing	/hands-on-exercise/3-cosmjs-adv/5-server-side.html

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From Code to MVP to Production

/hands-on-exercise/4-run-in-prod/

Show your checkers blockchain to investors and progressively the world:

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Simulate a production setup with Docker Compose	/hands-on-exercise/4-run-in-prod/1-run-prod-docker.html

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Tally player info after production	/hands-on-exercise/4-run-in-prod/2-migration-info.html

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Add a leaderboard as a module	/hands-on-exercise/4-run-in-prod/3-add-leaderboard.html

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Migrate the leaderboard module after production	/hands-on-exercise/4-run-in-prod/4-migration-leaderboard.html

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Simulate a migration in production with Docker Compose	/hands-on-exercise/4-run-in-prod/5-migration-prod.html

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IBC - Advanced

/hands-on-exercise/5-ibc-adv/

Test your IBC knowledge by developing your checkers blockchain further:

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Go relayer	/hands-on-exercise/5-ibc-adv/1-go-relayer.html

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Hermes relayer	/hands-on-exercise/5-ibc-adv/2-hermes-relayer.html

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IBC app development introduction	/hands-on-exercise/5-ibc-adv/3-ibc-app-intro.html

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Make a module IBC-enabled	/hands-on-exercise/5-ibc-adv/4-ibc-app-steps.html

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Add packet and acknowledgement data	/hands-on-exercise/5-ibc-adv/5-ibc-app-packets.html

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Extend the checkers game with a leaderboard	/hands-on-exercise/5-ibc-adv/6-ibc-app-checkers.html

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Create a leaderboard chain	/hands-on-exercise/5-ibc-adv/7-ibc-app-leaderboard.html

This repo contains the code and content for the Developer Portal and the Interchain Developer Academy.

Note: The layout metadata at the top of the README.md file controls how the tutorial page is published. Write permissions are limited to preserve the structure and contents.

These tutorials guide you through actionable steps and walk-throughs to teach you how to use the Interchain Stack. The Interchain Stack is the world’s most popular framework for building application-specific blockchains, it consists of several products:

Cosmos SDK, a modular framework to build blockchain applications
IBC, the Inter-Blockchain Communication protocol that allows blockchains to communicate
Tendermint, the algorithm that provides the consensus and networking layer for your blockchain application through CometBFT

The Developer Portal contains three types of content:

Concepts, informational content explaining the how the Interchain Stack functions
Individual Tutorials, short tutorials to get you up to speed with individual components
Checkers Game, a modular tutorial that covers the full stack and teaches you every element from set-up to launching in production with a front-end application attached.

Going through the entire content will teach you about:

Blockchain technology and cryptography
Developing with the Cosmos SDK & Ignite CLI
The CometBFT consensus algorithm
The Inter-Blockchain Communication Protocol
Building front- and backends with CosmJS
Integrating wallets such as Keplr
Relaying in the Interchain network

The code and docs for each tutorial are based on a specific version of the software. Be sure to follow the tutorial instructions to download and use the right version.

Use the tutorials landing page as your entry point to articles on Interchain blog, videos on Interchain YouTube, and ways to get help and support.

This repo manages and publishes the developer platform. If you would like to contribute, please take a look at our CONTRIBUTION GUIDELINES and /sdk-tutorials/TECHNICAL-SETUP documents.

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