Ash Tewari

blockchain

ato2022-poap

Get an NFT at All Things Open 2022

tewari

You can get a free commemorative NFT if you met me at All Things Open Conference in Raleigh, NC. DM me at @ashtewari for the code to redeem your POAP NFT Visit https://app.poap.xyz/claim/ and enter your code Enter your Ethereum address (or ENS/Email) Check [Free minting on Gnosis] for free minting of NFT on xDAI chain If you uncheck this box you can migrate to Ethereum mainnet now but you will have to pay for that transaction. You can also migrate to mainnet later if you wish. Click on Mint POAP button Your NFT will be confirmed after the minting is complete. POAPs are Non Fungible Tokens (NFT) issued on the blockchain. Learn more of POAPs here : https://poap.xyz/

Security Analysis of Etheruem Smart Contracts with Mythril

tewari

Mythril is an open-source security analysis tool for EVM bytecode, courtesy of ConsenSys. It is also a component of their Security Analysis Service – Mythx. Mythril detects security vulnerabilities in smart contracts built for Ethereum and other EVM-compatible blockchains. Vulnerabilities found by Mythril are reported with reference to the weaknesses listed on the Smart Contract Weakness Classification Registry (SWC Registry). I will use two entries from SWC Registry for the examples in this article: SWC-106 – Due to missing or insufficient access controls, malicious parties can self-destruct the contract. SWC-107 – One of the major dangers of calling external contracts is that they can take over the control flow. In the reentrancy attack (a.k.a. recursive call attack), a malicious contract […]

KHEL Coin on Ethereum

tewari

KhelCoin (KHEL) is an ERC-20 token available on Ethereum blockchain. It is a Smart Contract created with Solidity, OpenZeppelin, Truffle, Ganache, Remix, web3.js and VSCode. It is currently available on Rinkeby test network. It will be launched on the Mainnet in the near future. You can get KHEL coins from this website – KHEL Coin ICO Head over to the ICO website. You will be prompted to install Metamask and connect to your account on Rinkeby testnet. Click on “Buy KHEL Coins” button to get your own coins! Source code is on github – https://github.com/ashtewari/khelcoin Puzzle Icon Credit: https://www.flaticon.com/free-icons/puzzle

Getting started with Blockchain

tewari

Washington DC – May 2019 In this session, we will introduce you to the world of Blockchain technology. We will start with the fundamentals and explain the characteristics and use cases of Blockchains and Decentralized applications. We will explain public Blockchains as well as permissioned Blockchains – with examples from Ethereum and Hyperledger. You will learn how to create a private blockchain to get started. You will learn about Ethereum and how to program Smart Contracts for Ethereum Blockchain. We will also share best practices for secure and effective Smart Contracts development. Image Credit: Davidstankiewicz, Blockchain Illustration 2, CC BY-SA 4.0

TRINUG – Programming Smart Contracts on Ethereum Blockchain

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TRINUG – Main Meeting : Programming Smart Contracts on Ethereum Blockchain – August 2018 In this session, Ash will introduce you to the world of Blockchain programming. You will learn about Ethereum and how to program Smart Contracts for Ethereum Blockchain. You will learn how to deploy and test your Contracts on a public Ethereum Testnet. Ash will share best practices for Smart Contract development. You will be able to participate in a hands-on walk-through in the latter half of the session.

Charlotte IOT – Programming Smart Contracts on Ethereum Blockchain

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Charlotte IOT – July 2018 You will not want to miss this chance to learn about Blockchain, a technology enabling an entire IoT ecosystem! It has a distributed database for all the transactions, which eliminates the need for the third party to authenticate the transactions. The database ledger is a continuously growing list of records, called blocks, which are linked and secured using cryptography. Charlotte IoT wants to thank Ash Tewari for traveling from Raleigh to share his extensive knowledge and experience around Blockchain. In this session, Ash will introduce you to the world of Blockchain programming. You will learn about Ethereum and how to program Smart Contracts on Ethereum Blockchain. You will learn how to deploy and test your code on a public Ethereum […]