Part 1

Extending Bitcoin to get Ethereum
How to break/improve Ethereum
Healthcare and Rights Management

The Blockchain

The Merkle Tree

What if we put code...

on the blockchain?

Bitcoin vs bitcoin

Ethereum vs Ether vs Gas

Real Applications

MedRec and MTonomy

Part 2

Looking at code
Reading some code
Writing some code

• Web3 - https://web3js.readthedocs.io/en/1.0/index.html

Interacting with contracts 

• Types https://solidity.readthedocs.io/en/develop/types.html -just skim this

• constructors and functionshttps://solidity.readthedocs.io/en/develop/structure-of-a-contract.html#functions

special solidity calls https://solidity.readthedocs.io/en/develop/units-and-global-variables.html#special-variables-and-functions -just skim this

Writing contracts

Types

• boolean
  • true or false
• int and uint
  • represent 256 bit signed and unsigned numbers respectively
• address
  • holds a 20 byte ethereum address
• bytes1 - bytes32
  • fixed size byte array
• struct
  • fixed size byte array
• string
  • variable size byte array

Contract Structure

pragma solidity ^0.4.0;

contract SimpleStorage {
    uint storedData;

  function constructor() {
    // ...
  }

  function bid() payable { // Function
    // ...
    }

  }

}

Special Operations

• msg.sender
  • the ethereum address that directly called the contract
• msg.value
  • value of the calling transaction
• block.number
  • current blocknumber
• sha256 and sha3
  • hash functions
• selfdestruct(<address>)
  • kill self and send money to an address
• wei, finney, szabo, ether
  • currency denominations

Contract walkthrough

put link here

Part 3

Write contracts

Development Time

Tasks:

A) redo the solidity tutorial videos

B) do some of these challenges

http://shoutkey.com/three

More Stuff

Proof of Stake and Authority

Context of Smart Contracts

Race to Empty

 Blockchain Projects

Contact