Intro to

Blockchain and

EthereumNIColas 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 fundsImage 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?