Too Long; Didn't Read
How To Build a Smart Blockchain That Prevents Double Spending: A Step-by-Step Guide. The present article was written in February 2021 by Somayeh Gholami and Mehran Kazeminia in two versions in English and Persian. Verification of all transactions is possible with just a few lines of code with a Solidity language, and we will explain all the necessary details for the first time in this article. We will show once again that the task of verifying tokens and cryptocurrency transactions can be entrusted to smart contracts with confidence, and there is no need for all sorts of consensus mechanisms.