In this tutorial we will explain how to use Optimistic Ethereum layer 2 Mainnet and Testnet. We will review how…
Multiple ways to upgrade a Solidity smart contract
There are situations when you want to upgrade a Solidity smart contract. You might want to fix a software vulnerability,…
Ether balance in MicroPython on an ESP32 board
In this tutorial we will capture an Ether balance in MicroPython on an ESP32 board. We will write Python code…
Hide Solidity code with an external contract
How to hide Solidity code with an external contract. In Solidity a contract can reference the code of another contract.…
Crypto prices in MicroPython on an ESP32 board
The objective of this tutorial is to capture real time crypto prices in MicroPython running on an ESP32 board. We…
How to use MicroPython with a ESP32 board
In this tutorial you will learn how to use MicroPython with a ESP32 microcontroller development board. These instructions will help…
How to fork the SafeMoon token smart contract
Fork the SafeMoon token smart contract. SafeMoon is a crypto currency token on the Binance Smart Chain. The token got…
Use a signature to generate a public key
In Ethereum one can use the v, r and s parameters of a signature to generate a public key. In…