September 5, 2019

(Part 7/18 updated) Introduction to Web3.js 1.2 (Latest version) – Beginners Tutorial

When you develop an Ethereum Dapp, once you have the frontend and the smart contract, you need to connect them together. This is not easy. Fortunately, Web3 is here to save you! Wait... not so fast... Actually, it's not that easy to learn how to use Web3: Many Web3 tutorials…

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June 23, 2019

Alternatives to web3.js

Web3.js is the leading client library for Ethereum. Personally, I am fine with it, but I know that some developers don't like it because of the beta that never ends, and some random regressions happening between in recent releases. In anycase, it's always good to know some alternatives so that…

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June 17, 2019

Which version of web3 should you use?

TLDR: web3-beta 1.0.0-beta.55 npm install web3@1.0.0-beta.35 If you have worked with web3 before, you might have noticed a few.... glitches to say the least. The most annoying thing is that some features tend to break randomly from one release to the other. How can we deal with this, and which…

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June 16, 2019

Call vs transaction API in Ethereum

In Ethereum, there are 2 APIs to interact with a smart contract: Calls (eth_call) Transactions (eth_sendTransactions) In Solidity (the language for writing Ethereum smart contracts), there are 2 kind of functions: view functions, which don't modify state variables non-view functions, which DO modify state variables Which Ethereum API to use…

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September 3, 2018

ToDo List Ethereum Dapp (Step5) | Build a smart contract client with Truffle Contract

This tutorial is part of the series ToDo List Ethereum Dapp. It is the Step 5. Tutorials already published: (more…)

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August 12, 2018

ToDo List Ethereum Dapp (Step4) | Setup The Frontend & Read Account Data This tutorial is part of the series ToDo List Ethereum Dapp. It is the Step 4. Tutorials already published: Intro Step 1: Writing The ToDo Smart contracts- beginning Step 2: Writing The ToDo Smart contracts - end Step 3: Writing The Nodejs Backend Step 4: Setup the frontend and…

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November 13, 2017

Calling A Smart Contract Method From Web3 (1.0) | Episode 4

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November 8, 2017

Deploy A Smart Contract With Web3 (1.0) | Episode 3

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