Lottery as a Smart Contract: The Business Logic

Lottery as a Smart Contract: The Business Logic

Writing a lottery contract is a great way to learn important Smart Contract concepts such as State, Event and Visibility. In this 3 part series, I will describe the logic and codes behind a Lottery Smart Contract. In developing my Lottery Contract, I used Oraclize, a data carrier service that executes external JSON web services.

Motivation

Escrow Service as a Smart Contract: The Business Logic

Escrow Service as a Smart Contract: The Business Logic

An area of Smart Contract development that has consistently intrigued me is its real world usage to disintermediate the middleman. There's one gem of a Smart Contract that achieves this in the Solidity documentation called Safe Remote Purchase.  This is the first blog post of a 2-parter where I will document how to execute Safe Remote Purchase using a combination of Remix and MetaMask.

A DApp to capture supper expenses for buddies

Going Dutch - A Dapp to capture supper expenses for buddies

This is a continuation of the Going Dutch Smart Contract project that I started on 2nd Sep 2017. It has been a month, which is probably the equivalent of a year if you count in blockchain-time. Geth has gone from 1.6.7 to 1.7.2 and after upgrading my setup, I had to let it run overnight (in fast mode!) to sync my node to the block again.

Objective

Running DApp on a mobile device with Status

Running DApp on a mobile device with Status

This is a continuation of my post about Ethereum on the Cloud and Smart Contract execution with MetaMask. MetaMask is a Google Chrome extension and runs only on desktops. I wanted to execute Dapps on a mobile device on the go. Enters Status. Status is a mobile application on Android and iPhone. It allows you to run Decentralized apps, stores your ETH in a wallet and send/receive ETH from another person. It also runs like chatbot.

Installing Status