August 2018
Intermediate to advanced
404 pages
11h 19m
English
Content preview from Ethereum Cookbook
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How to do it…
- It is not possible to fix the bug by updating the code in the smart contract due to the immutable nature of Ethereum smart contracts. Upgradable smart contracts are a way to overcome this issue for a certain limit. But, it reduces the user's trust in the smart contracts.
- There are several design techniques that can be considered while writing smart contracts to minimize the effect of a potential bug.
- Let's consider a simple contract that allows the deposit and withdrawal of Ether from a contract. We can try implementing various design techniques to avoid the loss of funds up to a certain limit:
pragma solidity ^0.4.24;contract VulnerableContract { function deposit() public { // Code to accept Ether } function withdraw() public ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.