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2. Intermediate Course

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  1. 1. What is Layer 0 in Blockchain technology?
  2. 2. What is layer 1 in Blockchain?
  3. 3. Second layer (layer 2) - what is it? 
  4. 4. Blockchain and its layers - What is layer three in Blockchain (L3)?
  5. 5. Ethereum 2.0 - What is it? 
  6. 6. Ethereum Proof-of-Stake (PoS) - what should you know?
  7. 7. Ethereum London Hard Fork - what is it ? 
  8. 8. What is the Ethereum Name Service (ENS) and how does it work?
  9. 9. Arbitrum: Ethereum scaling solution - everything you need to know
  10. 10. Polygon 2.0 - the value layer for the Internet
  11. 11. Ethereum ERC-4337 - what is it and how does this standard work?
  12. 12. What is an ERC20 token and how is it created?
  13. 13. The ERC-721X VS ERC-721 Standard – Key Differences!
  14. 14. What is cryptocurrency burning?
  15. 15. Examples of the use of WEB3 on the blockchain
  16. 16. What is Web5? 
  17. 17. Blockchain Oracle - what are oracles? 
  18. 18. Polkadot - Decentralized blockchain and DOT cryptocurrency
  19. 19. Polkadot Parachain - Next-generation blockchain
  20. 20. Interoperability in the world of cryptocurrencies and blockchain
  21. 21. What is Blockchain sharding?
  22. 22. Mainnet versus Testnet on the Blockchain. The complete guide!
  23. 23. MINA Protocol: the lightest blockchain in the world!
  24. 24. Sustainable Blockchain - Proof of Useful Work & Flux
  25. 25. Cosmos SDK: Building the Blockchain Ecosystem
  26. 26. What is cross-chain interoperability in Blockchain technology?
  27. 27. Blockchain trilemma - explanation of the problem. What is the impact on cryptocurrency payments?
  28. 28. Non-fungible tokens and NFT exchanges
  29. 29. How to make money with NFT?
  30. 30. What is the NFT licence fee?
  31. 31. NFT Gas Fee - what is it? How can you reduce your gas fee?
  32. 32. The main differences between static NFT and dynamic NFT
  33. 33. What is minting an NFT?
  34. 34. What are NFT Ordinals? A guide to Bitcoin NFT.
  35. 35. What is KnowOrigin NFT, and how does it work?
  36. 36. ERC-6551 - the new NFT standard. What does it bring to the non-exchangeable token sector?
  37. 37. What is NFT Lending all about? An innovative solution in the world of cryptocurrencies!
  38. 38. The Metaverse – a new virtual world
  39. 39. Metaverse – TOP 15 virtual reality projects
  40. 40. Technical analysis – is it worth using?
  41. 41. Trading order types: stop loss, trailing stop loss, LIMIT
  42. 42. Market Cap versus Fully Diluted Market Cap - the most important differences you should know!
  43. 43. Set up of Stop Loss and Take Profit orders
  44. 44. What are DeFi liquidity pools?
  45. 45. Real Yield in DeFi - what is this trend? What does it consist of?
  46. 46. Vampire Attacks in Decentralized Finance (DeFi): Explanation and Examples
  47. 47. What are wrapped tokens 
  48. 48. What are security tokens?
  49. 49. What are Social Tokens? 
  50. 50. Liquidity Provider Tokens (LPs). What are they, and why are they so important?
  51. 51. What is the Lightning Network, and how does it work?
  52. 52. What is Play-to-Earn (P2E) and how does it work?
  53. 53. Cryptocurrency steps - What is move to earn M2E?
  54. 54. Segregated Witness - what is Segwit Bitcoin all about?
  55. 55. What are Decentralized Cryptocurrency DEX Exchanges?
  56. 56. What is Curve Finance?
  57. 57. What is GameFi and how does it work?
  58. 58. What is Proof of Reserves (PoR)? How does it work?
  59. 59. DAO Investment: A revolution in the world of finance and investment
  60. 60. What is MakerDAO and DAI Stablecoin?
  61. 61. What is the SubDAO protocol, and how does it work?
  62. 62. How to Create Your Own Decentralized Autonomous Organization (DAO)?
  63. 63. Atomic Swap: What is an atomic swap, and how does it work with cryptocurrencies?
  64. 64. What Is Cryptocurrency Vesting? What Are Its Advantages?
  65. 65. What Is the Metaplex Candy Machine Protocol? How Does It Work?
  66. 66. What Is the BNB Greenfield Ecosystem?
  67. 67. What Is Slashing in Cryptocurrencies?
  68. 68. Royalties – What Are They? How Does This Type of Licensing Fee Work?
  69. 69. What is TradFi? The importance for cryptocurrencies!
  70. 70. What is the Real World Asset (RWA) trend in cryptocurrencies? Explanation and examples!
  71. 71. Pyth Network: a powerful oracle harnessing the power of Solana!
  72. 72. What are stables in the world of cryptocurrencies?
  73. 73. What Is Binance Oracle?
  74. 74. Shibarium: A new era in the Shiba Inu ecosystem?
  75. 75. What is an ETF? How will an exchange-traded fund on bitcoin work?
  76. 76. Symmetric and asymmetric encryption - key cryptography techniques!
  77. 77. Hedging in cryptocurrencies - great portfolio protection against risk!
  78. 78. How to create your own cryptocurrency? 
  79. 79. What is a Dusting Attack in cryptocurrencies? How to protect against it?
  80. 80. What is a Black Swan?
Lesson 25 of 80
In Progress

25. Cosmos SDK: Building the Blockchain Ecosystem

Blockchain is a technology that has revolutionized the way we think about storing value and conducting online transactions. 

It has given rise to cryptocurrencies, smart contracts, and many other innovations that have influenced the way the global economy, particularly the financial economy, operates. However, while blockchain is extremely promising, its full potential is still being explored and developed. 

It is in this context that the Cosmos SDK, a tool that aims to simplify the process of creating and managing your own blockchains, is emerging. 

In today’s lesson, we will take a closer look at what the Cosmos SDK is, how it works, and its applications in the blockchain technology sector.

What is the Cosmos ecosystem?

The Cosmos ecosystem is a decentralized network of independent and parallel blockchains. Each can scale and communicate with the others. Interestingly and just as importantly, each chain is powered by the Tendermint consensus algorithm. 

The Cosmos platform is a developer’s paradise. It allows them to build their blockchains that process transactions very quickly, are independent, and can work with other chains. This is all thanks to the use of Tendermint, the Cosmos SDK framework, and IBC.

What is Tendermint and IBC?

To understand how the Cosmos SDK works, we first need to understand how Tendermint and IBC work.

Tendermint is an algorithm of consensus used by chains in the Cosmos network. In practice, it is software used to replicate applications securely and consistently across multiple computers. Tendermint works even when most of the computers on a given network have failed. Moreover, the machines are consistent, meaning that each machine sees the transaction log and calculates the same state.

So you have already noticed that Tendermint has the ability to tolerate errors and machine failures. This concept is familiar to you – for we are talking about Byzantine Fault Tolerance (BFT).

Tendermint has been designed so that no chain splitting (fork) occurs under any circumstances. Transactions are acknowledged immediately as soon as they are in a block. This action reduces the time required for developers to create a new chain of blocks.

IBC, or Inter-Blockchain Communication, is the protocol responsible for communication between chains in the Cosmos network. It facilitates the transfer of data or even tokens between chains. 

Importantly, IBC works despite the differences that may exist between chains. Not surprisingly, achieving compatibility with it is relatively easy.

So what is the Cosmos SDK?

The Cosmos SDK is based on the Go programming language and is designed to facilitate the process of creating your own blockchain. The tool provides ready-made modules that can be combined and customized to meet the specific needs of a project. These modules include features such as account management, rate delegation, Proof-of-Stake, smart contracts, and much more.

Thanks to the modular design of the Cosmos SDK, developers can create blockchains that are precisely tailored to their goals. There is no need to write everything from scratch, significantly speeding up the process of creating new blockchain projects. This makes the Cosmos SDK an attractive tool for both experienced blockchain developers and those who are just starting out with blockchain technology.

The Cosmos SDK has one goal: to enable developers to easily create custom, interoperable blockchain applications across the Cosmos ecosystem, without having to recreate common blockchain functionality. So, imagine that the Cosmos SDK is such a framework for creating secure blockchain applications on top of Tendermint.

Cosmos SDK optimizes flexibility and security. The solution is designed to allow other applications to adapt to current needs. The Cosmos SDK is based on two main pillars:

  1. Composability: Anyone can create a module for the Cosmos SDK. Implementing the created modules is as simple as importing them into the blockchain application.
  2. Security: Any developer who wants to use the functionality of the Cosmos SDK will need to access other companies’ modules when creating their own. In practice, this means that we do not need to access checklists for other modules, as each module implements its own maintainer. This means that if module A is passed to module B, module B will be able to call a specific set of functions of module A.

At the moment, the Cosmos SDK tool only works on the Golang network. This means that developers can only develop their modules there. Of course, in the near future, the Cosmos SDK will be implemented in other programming languages.


The Cosmos SDK is a tool that contributes to the development of blockchain technology and the ecosystem based on it. With its modular design and IBC protocol, the Cosmos SDK enables the creation of independent blockchains that can work together within the Cosmos ecosystem. 

This opens up many opportunities for application developers and projects to use different blockchains in their solutions. As blockchain technology continues to evolve, the Cosmos SDK remains one of the leading tools to help develop it and realize its potential.

Complete today’s lesson!

  1. What is PoS and what is PoW?
  2. What is Tendermint and how does it work?
  3. Scalability of blockchain technology – what is it?
  4. What is Byzantine fault tolerance in blockchain technology?