1. Blockchain and Cryptocurrencies
Hands-On Lab: Playing with Wallets and Transactions
Ethereum
Svetlin Nakov
Inspiration Manager
Software University
© Software University Foundation –
This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike license.

2. About Svetlin Nakov
Software engineer, trainer, entrepreneur, author of books, blockchain expert
Portfolio of 3 successful training initiatives:
National Academy for Software Development (NASD)
Telerik Software Academy
SoftUni (the Software University)

3. What is Blockchain? Distributed ledger Decentralized
(no owner)
Peer-to-Peer network
Nodes hold ledger of facts + history of updates
Secure
Transactions are verified by the entire network
Immutable

4. Blockchain == Chain of Data Blocks
timestamp
block_hash
all_transactions_hash
transaction #1
hash
transaction #2
transaction #3 …
Block #0 (genesis block)
prev_hash
nonce
timestamp
block_hash
all_transactions_hash
transaction #1
hash
transaction #2
transaction #3 …
Block #1
nonce
prev_hash
timestamp
block_hash
all_transactions_hash
transaction #1
hash
transaction #2
transaction #3 …
Block #3
prev_hash
nonce
Demo:

5. Blockchain Applications
Decentralized applications
Removing the middlemen
Cryptocurrencies
Digital money with no central bank
Digital investments
Fund raising / ICO / token sales

6. Blockchain Platforms https://coinmarketcap.com Litecoin Bitcoin
The first famous blockchain cryptocurrency
Ethereum
The first famous smart contracts platform
Litecoin
Ripple
Dash
Monero

7. Wallets Cryptocurrency wallets: Software wallets Hardware wallets
Store securely the private keys of your blockchain assets
Hold multiple addresses + private keys
May hold BTC, ETH, ERC20 tokens, etc.
Software wallets
Hardware wallets
Online wallets

8. Play with Jaxx Wallet and Ethereum
Practice
Play with Jaxx Wallet and Ethereum

9. Install the Jaxx Wallet
Desktop / Mobile

10. Enable the Ethereum Testnet (ETHt)

11. Share Your Wallet Address with Us
#jaxx

12. Send ETHt to the People Around You

13. Ethereum Testnet Faucets
Request test ethers (ETHt) from the Faucets

14. Blockchain and Cryptocurrencies
© Software University Foundation –
This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike license.

15. License
This course (slides, examples, demos, videos, homework, etc.) is licensed under the "Creative Commons Attribution- NonCommercial-ShareAlike 4.0 International" license
© Software University Foundation –
This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike license.

16. Trainings @ Software University (SoftUni)
Software University – High-Quality Education, Profession and Job for Software Developers
softuni.bg
Software University Foundation
Software Facebook
facebook.com/SoftwareUniversity
Software University Forums
forum.softuni.bg
© Software University Foundation –
This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike license.