EtherWorld's weekly: April 08, 2019

Elon Musk says "Paper money is going away; PayPal and its first blockchain investment; Ethereum Name Service AMA and more......

Reading Ethereum Geth database (LEVELDB)

Geth stores all blockchain data in LevelDB database that stores value in key-value pair. We normally do not need to access these data files because geth provides many utilities to interact with underlying data structure. But, just to understand how geth stores data, let's hack a little bit....

EtherWorld's weekly: April 01, 2019

Dear Reader, With immense pleasure, I welcome you to join us in the celebration of 100th edition of EtherWorld's Blockchain Weekly. Looking back at Edition 01, EtherWorld started with a mission of creating awareness about the blockchain technology and brought a lot of learning for myself (as an individual) too. We've been sharing blockchain technical articles, news and project updates for about 2 years. We've been trying to contribute to the community within our capacity...

ÐΞVp2p Wire Protocol (Kademlia Distributed Hash Table)

This article is an attempt to look into Ethereum ÐΞVp2p protocol. I will break this into multiple parts. In this article I am going to cover Kademlia Distributed Hash Table. Kademlia distributed hash table was designed by Petar Maymounkov and David Mazières in 2002 for decentralized peer-to-peer computer networks. Ethereum ÐΞVp2p uses Kadmelia distributed hash table to maintain a list of peers. Following are some details of Kadmealia DHT which will help you understand the...

Web3 subscription APIs and watching birth of CryptoKitty

Web3 provides some very useful APIs by which you can subscribe to the events on Ethereum blockchain. Web3 is a JavaScript library which interact with Ethereum node over RPC. Let's walk through a couple of subscription APIs. Watching Events Web3 can be used on browser as well as server side. This example is going to use Nodejs on server side. Also, I've used Ubuntu to do this example but it should be valid for Windows...

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