Categories
blog Getting started javascript

How to deal with big numbers in Javascript

Most of numeric values in Solidity smart contracts are expressed using uint256, unfortunately Javascript numbers are always 64-bit floating point. Therefore when you call a function that returns an uint256 you’ll receive a string instead of a Javascript number. Moreover Solidity does not handle floating number so Eth and token amounts are expressed as unsigned […]

Categories
blog data analytics

Explore Ethereum Data with SQL queries on Dune Analytics

This tutorial will teach you how to query onchain data using the amazing Dune Analytics platform. Dune Analytics is the all-in-one destination to query, visualise, share and explore human readable smart contract data. It’s trusted by a lot of awesome companies like Gnosis, Compound and Bancor. For using the platform to make your own queries […]

Categories
blog DeFi Getting started Tests

Testing your smart contract with existing protocols: Ganache fork

When you’re developping Ethereum contracts that interact with other Dapps and protocols like DeFi it’s important to be able to test your smart contracts agains the blockchain as you can’t re-deploy every smart contracts that your smart contract depends on. For this we’ll use Ganache from Truffle. Ganache is a program that lets you quickly […]

Categories
blog

Every block explorers Ethereum developers should know about

In this article we’ll cover the most useful block explorers for developers and what we love about them. A block explorer is a user interface that let you explore blocks, transactions, accounts of the blockchain. Some offers useful API and other interesting aggregated data like sourcecode, events… Etherscan Etherscan is definitely the most popular block […]

Categories
blog

Hack Money, a virtual hackathon to build DeFi applications.

A lot of hackers are stuck at home during the COVID-19 epidemy and ETHGlobal will make sure we will not get bored! After organizing 14 in-person hackathons around the world to accelerate the Ethereum ecosystem it’s now time for a hackathon anyone can participate from anywhere! The Hack Money hackathon will be accessible to anyone […]