The blockchain is not only restricted to Bitcoin and crypto-currencies. It's a distributed ledger technology, meaning you can write different things on it, depending on the technology involved. Ethereum is such a blockchain implementation that allows to write code.In this talk, I'll show you how to start coding on Ethereum, how to deploy your code, how to test it and how to call your code from the world outside the blockchain, all based on live demo.After the talk, you'll be able to start your own journey on the blockchain.

1. STARTING ON
ETHEREUM, A
DEVELOPER’S
APPROACH

2. ME, MYSELF AND I
@nicolas_frankel #ethereum #developer
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By day
• Developer
By night
• Teacher
• Book author
• Conference speaker
• Blogger

3. HYBRIS, AN SAP COMPANY
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4. DISCLAIMER
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1. I’m not a FinTech expert
2. I’m not a BlockChain expert
3. I’m not an Ethereum expert
4. I’m just a developer!
5. (You won’t get rich by
attending this presentation)

5. BLOCKCHAIN?
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A chain of blocks 

6. BLOCKCHAIN
• Content: More content
• Hash: 0x445566
• Previous hash: 0x112233
Block 2
• Content: First meaningful content
• Hash: 0x112233
• Previous hash: 0
Block 1
• Content: null
• Hash: 0
Block 0
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7. BLOCKCHAIN PROPERTIES
Immutable
Distributed
Transparent
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8. TOP 10 CRYPTOS BY MARKET CAP
Market cap (as of Apr. 5th 2018)
1 Bitcoin $115,546,442,632
2 Ethereum $37,362,905,045
3 Ripple $19,345,376,207
4 Bitcoin Cash $10,923,911,621
5 Litecoin $6,668,812,205
6 EOS $4,700,080,629
7 Cardano $3,833,135,890
8 Stellar $3,651,361,761
9 NEO $3,059,712,500
10 Monero $2,761,064,420
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Source https://coinmarketcap.com/

9. WHY ETHEREUM?
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1. You can write code
2. Deploy it on the blockchain
3. Call it from outside the
blockchain

10. ETHEREUM VM
“From a practical standpoint, the EVM can be
thought of as a large decentralized computer
containing millions of objects, called "accounts",
which have the ability to maintain an internal
database, execute code and talk to each other.”
--https://github.com/ethereum/wiki/wiki/Ethereum-Development-Tutorial
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11. ACCOUNT TYPES
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Externally owned account
Contract

12. ETHEREUM CONCEPTS
 “[…] the Ethereum execution environment is
lifeless; nothing happens and the state of every
account remains the same.
 However, any user can trigger an action by
sending a transaction from an externally owned
account, setting Ethereum's wheels in motion.
 […] if the destination is a contract, then the
contract in turn activates, and automatically runs
its code.”
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13. ETHEREUM CODE
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Ethereum runs specific
bytecode
Solidity is the language of
choice

14. SOLIDITY
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Influenced by:
• C++, Python and JavaScript
Features
• Statically typed
• Offers inheritance
• Supports libraries
• Allows user-defined types

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16. INTERESTING FACTS
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contract as top-level
block name
Return value can be named
Multiple return values
pure keyword

17. DEVELOPING FOR REAL
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Production network
Test network
• Rinkeby
Your own local

18. ETHEREUM WALLET
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19. @nicolas_frankel #ethereum #developer
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20. INDUSTRIALIZATION
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Testing
• Automated
Deployment

21. TRUFFLE
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Ethereum “framework”
• Dedicated structure
NPM package
Provides a local network

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23. Q&A
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http://blog.frankel.ch/
@nicolas_frankel
https://git.io/vNZ3P