Riga Dev Days - Starting on Ethereum, a developer's perspective

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You might have heard about the Blockchain. You might have even heard about the Bitcoin. You dream of getting rich by using them. Forget that, you're a developer! Let's see how we can use the blockchain technology to code and deploy an app on the blockchain.

Software

STARTING ON ETHEREUM
A DEVELOPER’S
APPROACH

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

DISCLAIMER
@nicolas_frankel #ethereum #developer
3
I’m not a FinTech expert
I’m not a BlockChain expert
I’m not an Ethereum expert
I’m just a developer!
(You won’t get rich by attending this
presentation)

BLOCKCHAIN?
@nicolas_frankel #ethereum #developer
4
A chain of blocks 

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
@nicolas_frankel #ethereum #developer
5

BLOCKCHAIN PROPERTIES
Immutable
Distributed
Transparent
@nicolas_frankel #ethereum #developer
6

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
@nicolas_frankel #ethereum #developer
7
Source https://coinmarketcap.com/

WHY ETHEREUM?
@nicolas_frankel #ethereum #developer
8
1. You can write code
2. Deploy it on the blockchain
3. Call it from outside the blockchain

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
@nicolas_frankel #ethereum #developer
9

ACCOUNT TYPES
@nicolas_frankel #ethereum #developer
10
Externally owned account
Contract

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.”
@nicolas_frankel #ethereum #developer
11

ETHEREUM CODE
@nicolas_frankel #ethereum #developer
12
Ethereum runs specific bytecode
Solidity is the language of choice

SOLIDITY
@nicolas_frankel #ethereum #developer
13
Statically typed
Offers inheritance
Supports libraries
Allows user-defined types

@nicolas_frankel #ethereum #developer
14

INTERESTING BITS
@nicolas_frankel #ethereum #developer
15
Language version header
contract as top-level block name
Return value can be named
Multiple return values
pure keyword

BEYOND THE SANDBOX
@nicolas_frankel #ethereum #developer
16
Your own local network
Test network
• Rinkeby
Production network

ETHEREUM WALLET
@nicolas_frankel #ethereum #developer
17

INDUSTRIALIZATION
@nicolas_frankel #ethereum #developer
18
Testing
• Automated
Deployment

TRUFFLE
@nicolas_frankel #ethereum #developer
19
Ethereum “framework”
• Dedicated structure
NPM package
Provides a local network

THANKS!
@nicolas_frankel #ethereum #developer
20
http://blog.frankel.ch/
@nicolas_frankel
https://git.io/vNZ3P

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Gáspár Nagy

Choosing the right Recruitment Management Software can be difficult considering how many are available. Let us begin by describing what a recruitment management system is. In simplified terms, Recruitment Management Software refers to a comprehensive suite of tools designed to effectively oversee and streamline an organisation's recruitment process. To know more information here: https://sites.google.com/view/nyggs-recruitment-management/home

What is a Recruitment Management Software?

NYGGS Automation Suite

These are the slides of my OpenSIPS Summit 2024 presentation about automating your test calls. It dives into why automated call testing is crucial, how to integrate it into your CI/CD pipeline and how to extend testing of single calls into load testing and testing of other protocols. The presentation also provides details how open source components such as sipp, asterisk and rtpengine are used to implement agents to generate test calls for SIP, Fax and WebRTC at scale.

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Riga Dev Days - Starting on Ethereum, a developer's perspective

1. STARTING ON ETHEREUM A DEVELOPER’S APPROACH

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

3. DISCLAIMER @nicolas_frankel #ethereum #developer 3 I’m not a FinTech expert I’m not a BlockChain expert I’m not an Ethereum expert I’m just a developer! (You won’t get rich by attending this presentation)

4. BLOCKCHAIN? @nicolas_frankel #ethereum #developer 4 A chain of blocks 

5. 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 @nicolas_frankel #ethereum #developer 5

6. BLOCKCHAIN PROPERTIES Immutable Distributed Transparent @nicolas_frankel #ethereum #developer 6

7. 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 @nicolas_frankel #ethereum #developer 7 Source https://coinmarketcap.com/

8. WHY ETHEREUM? @nicolas_frankel #ethereum #developer 8 1. You can write code 2. Deploy it on the blockchain 3. Call it from outside the blockchain

9. 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 @nicolas_frankel #ethereum #developer 9

10. ACCOUNT TYPES @nicolas_frankel #ethereum #developer 10 Externally owned account Contract

11. 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.” @nicolas_frankel #ethereum #developer 11

12. ETHEREUM CODE @nicolas_frankel #ethereum #developer 12 Ethereum runs specific bytecode Solidity is the language of choice

13. SOLIDITY @nicolas_frankel #ethereum #developer 13 Statically typed Offers inheritance Supports libraries Allows user-defined types

14. @nicolas_frankel #ethereum #developer 14

15. INTERESTING BITS @nicolas_frankel #ethereum #developer 15 Language version header contract as top-level block name Return value can be named Multiple return values pure keyword

16. BEYOND THE SANDBOX @nicolas_frankel #ethereum #developer 16 Your own local network Test network • Rinkeby Production network

17. ETHEREUM WALLET @nicolas_frankel #ethereum #developer 17

18. INDUSTRIALIZATION @nicolas_frankel #ethereum #developer 18 Testing • Automated Deployment

19. TRUFFLE @nicolas_frankel #ethereum #developer 19 Ethereum “framework” • Dedicated structure NPM package Provides a local network

20. THANKS! @nicolas_frankel #ethereum #developer 20 http://blog.frankel.ch/ @nicolas_frankel https://git.io/vNZ3P