Smart Contracts

A Brief Introduction

Presentation by: Mick de Graaf

Mick de Graaf

Co-Founder CryptoPepes.io

Twitter: @MickdeG010

What is a smart contract?

First described by Nick Szabo in 1994

Why so special?

• Not only about currency
• Can replace traditional contracts
• Trustless alternatives for internet services
• Cannot go down
• Fuck banks and notaries

No more blackbox

Everyone can verify what happens on a blockchain. For instance an online casino can no longer cheat the player with skewed odds. The code is law.

Smart Contracts

have an address

Smart Contracts have code

Smart Contracts can store data

Smart Contracts can have funds

Smart Contracts will change the world

Ok nice some examples?

• Games
• Crowdfunding
• Last Wills
• Savings accounts
• Market places
• Tokens

Smart Contract platforms

• Ethereum
• Aeternity
• Neo
• RSK
• And more...

Today we'll talk Ethereum

Solidity

Programming language influenced by C++, Python and JavaScript

Targets the Ethereum Virtual Machine

Lets Buidl

A Last Will

What We'll need

• A way to notify the smart contract you are no longer alive
• Be able to appoint someone who gets the funds upon death
• A way of putting in funds
• A way of pulling out funds before death

How does the smart contract know I'm dead?

Simple! I will no longer be telling I'm alive

Variables

• beneficiary(address)
• owner(address)
• withdrawTime(uint256)

Functions

• signOfLife
• withdrawWhenAlive
• withdrawUponDeath
• getBalance

That wasn't that hard?

Thanks
Any

Questions?