Intro to Blockchain and Ethereum NIColas Cardenas - - PowerPoint PPT Presentation

Intro to Blockchain and Ethereum

NIColas Cardenas nic247365@gmail.com

Images of bank notes: http://banknotes.resbank.co.za/banknotes. Accessed 2016-06-11 Image of Alice: http://jojoesart.deviantart.com/art/Alice-in-Wonderland-301425862. Accessed 2016-06-11 Image of coin: http://www.coinzoo.net/africa-world-coin-collection/item/south-africa-5-rand-km492. Accessed 2016-06-11

• Transaction Number: Transaction #1
• Transaction inputs: R20 note and R10 note from me
• Transaction outputs: R25 to Alice and R5 back to me as

change

• Transaction contract: “I Nic reserve the

aforementioned amount for Alice, who has to present her signature as ID to claim the funds”

• Signature: Nicolas I. Cardenas
• We make duplicates for both of our record keeping

IOU image: https://bestmobileappawards.com/app-submission/iou-pro-debt-manager. Accessed 2016-06-11

• Transaction Number: Transaction #2
• Transaction inputs: R25 owed to Alice from transaction #1
• Transaction outputs: R10 to Bob and R15 back to Alice as

change.

• Transaction contract: “I Alice reserve the aforementioned

amount for Bob, who has to present his signature as ID to claim the funds”

• Signature: Alice Liddell
• Make duplicates of all transactions so they have a paper

trail of the transfer of funds

Image of Bob Marley: http://www.hunter.cuny.edu/afprl. Accessed 2016-06-11

Image of Charlie Chaplin: https://meatgrinder.co/colour-charlie-chaplin-301823.html. Accessed 2016-06-11

Transaction #1 Transaction #2

• Bob gives the transactions to our mutual friend Charlie to

verify

• Charlie checks that Alice has enough listed against her

name to pay Bob, and further more that I have enough to pay Alice

• Charlie checks that each time value is transferred, the

person transferring the money has signed to prove it is indeed them unlocking the funds

Nic’s unspent amounts: R5 from Transaction #1 Alice’s unspent amounts: R15 from Transaction #2 Bob’s unspent amounts: R10 from Transaction #2

Image of distributed network: http://anet.sourceforge.net/docs/user/userIntro.html. Accessed 2016-06-11

N

Miner image: https://www.cryptocoinsnews.com/kncminer-ditches-customers-favor-mining-bitcoin-litecoin-themselves/ Accessed 2016-06-12

Block

 Now how does one get the entire network

to come to a consensus on who verified the TXs?? Can’t use a timestamp.

Crossword image: http://www.animationoptions.com/photobphi/empty-crossword-template. Accessed 2016-06-12

A puzzle

Block

Block header

Block

Block header

Blockchain image: http://alexgorale.com/how-to-program-block-chain-explorers-with-python-part-1. Accessed 2016-06-12

Calculator image: http://calculator.citizen-europe.com/. Accessed 2016-06-12 Cell phone image: http://www.notebookcheck.net/Sony-Xperia-Z5-Compact.150067.0.html. Accessed 2016-06-12

 So the miners process the code in each

• transaction. They will only do it though if there

is enough money tied to that contract to pay to process code.

 The advantage of this is that programs can

be executed on a distributed network where no one can tamper because it is running on every miner simultaneously.

 If there isn’t enough money, the miner just

won’t run ones code.

Use cases for Ethereum

 ..\..\..\Desktop\Slock.it - Ethereum

Blockchain + IoT.mp4

 ..\..\..\Desktop\Augur - How A

Decentralized Prediction Market Works (Narrated by Shooter Jennings).mp4

 ..\..\..\Desktop\TransActive Grid

Intro.mp4

 Mastering Bitcoin – Andreas Antonopolous  Coursera – Bitcoin and Cryptocurrency

technologies

 Bitcoin Academy – 3 courses  Bitcoin whitepaper by Satoshi Nakamoto  Ethereum whitepaper

Questions?