Login
Discover
Waves
Communities
Write
Login
Signup
Topics
#
solidity
Explore topics
#solidity
Global
Trending
Hot
New
Payout
Muted
Promoted
#solidity
New
#solidity
Follow to get notified about new posts with this tag
Get #solidity by email
Follow
cklai
teammalaysia
4y
My Crypto Journey -22, Here is the reason why Im going learn RUST programing language
Explore the benefits and drawbacks of Solidity and Rust for blockchain development, and why Rust is ideal for flashloans
$ 2.633
378
1
2
edb
DBuzz
4y
Innovations in Ethereum smart contract exploits in 2022: Phantom Funct ...
Innovations in Ethereum smart contract exploits in 2022: Phantom Functions, Double-Entry Point Tokens, Fancy Native Tokens, NFT Flashloan Attacks, Read-Only Reentrancy, Cross-Protocol Reentrancy. #ethereum
$ 0.995
13
4
param1252
blockchain
4y
!
Low reputation account with an unverified outbound link, Reveal content
Writing Your First Contract In Solidity
Writing Your First Contract In Solidity Using Remix IDE
lemooljiang
HIVE CN 中文社区
4y
merkleTree验证白名单 / 学习智能合约#64
最近FTX爆了,据称是挪用了用户资金!不管是什么技术,最后还是回到了灵魂拷问:利和义,你取哪样?!吃瓜群众们又在那想验证资金的办法,怎么自证清白之类的。其实我想说,这只关乎人性,无关技术。如果真的关乎技术,那应该有N种办法。
lemooljiang
HIVE CN 中文社区
4y
节约gas小妙招 / 学习智能合约#63
把节约gas的几个方法测试了下,蛮有效的。以前看起来有些多余的操作其实是另有深意啊。比如常见的语句uint _arr = arr[i],直接写arr[i]不是更直观么,为什么非要定义一个变量呢?!现在终于揭晓了谜团:原来是为了节约gas啊! 案例集 中把这些方法都总结了,我也测试了下,还是很实用嘀! // SPDX-License-Identifier: MIT pragma solidity ^0.8.0;
lemooljiang
HIVE CN 中文社区
4y
multicall一次获取多条数据 / 学习智能合约#62
智能合约中的数据获取一般都有点难度,不是速度慢,就是节点限速等。对于要求速度快且准确的应用来讲,如何快速地获取数据就是一个值得重视的问题。 对于我来讲,我也遇到了相似的问题:在NFT合约中如何快速读取全部或是多数的NFT数据。大家都知道,一个NFT合约都是几百上千,很多是一万个数量,如何一次性读取多个,也尝试过不少方法。当然,现在推荐的方法是multicall。
lemooljiang
HIVE CN 中文社区
4y
代理升级模式 / 学习智能合约#61
前不久研究了下重入攻击的玩法,里面有个重要的特性:合约的fallback()函数。 fallback是合约的底层函数,在没有其它函数匹配的情况下会执行。这个特性导致了重入的风险性,但在另一方面,合约的升级性也会用到这一特性。这充分体现了一物的两面性:是好是坏取决于你!
lemooljiang
HIVE CN 中文社区
4y
call和delegatecall合约调用 / 学习智能合约#60
昨天研究了下重入攻击,有查到call这个函数,感觉它很万能--几乎能干所有的事情!既能转帐以太,又能调用合约,也就无怪乎有重入风险。现在solidity早就建议用transfer来转帐以太,调用合约用接口(interface)。其实用call来调用合约也是很方便的,同时还有个类似的函数delegatecall。 调用另一个合约中的函数,主要是两个方法:call 和 delegatecall。但推荐用接口调用!
lemooljiang
HIVE CN 中文社区
4y
研究尝试重入攻击 / 学习智能合约#59
这段时间听到很多黑客攻击事件,不免让人惴惴不安。虽然大多发生在一些新的项目,但金额都挺大,而且一般都是审计过的知名项目。所以,还是安全为上,自己多看多想,自己做判断,一些风险大的项目就不要参与了,特别是跨链桥! 重翻了下以太坊的安全问题,里面着重强调了重入攻击。以前也曾了解些,没有深入,现在刚好趁着空闲,来尝试下重入攻击。
hotsauceislethal
LeoFinance
4y
Shardeum Is A Brand New Layer1 Coming 2023! How To Get Your Airdrop
Who doesn't love a good airdrop? Well this year they are launching a brand new layer 1 called Shardeum, brought to us by the creator of WazirX, and it will be airdropping a portion of their total supply
wose
web3
4y
!
Low reputation account with an unverified outbound link, Reveal content
ElWose | VLOG001
ElWose | VLOG001 - The dev diary / august 2022 Quería iniciar una serie de posts orientados a la investigación de todo tipo de redes blockchain y proyectos DeFi en los que me gusta investigar, crear
jfdesousa7
GEMS
4y
Aprende a usar la libreria ethers una alternativa a web3
Por mucho tiempo web3.js ha sido la libreria mas popular para interactuar con la blockchain, ahora ethers va aumentando su populariadad entre los desarrolladores y comparado con web3 ofrece numerosas ventajas
jfdesousa7
GEMS
4y
Firma y verifica mensajes con React.js, Ethers y MetaMask - parte 1
Aprenda a generar y verificar firmas usando React.js y la billetera MetaMask. #solidity #reactjs #ethers #metamask ▶️ 3Speak
jfdesousa7
EspaVlog
4y
Propiedad en los contratos (Owner)
La propiedad del contrato es una parte común de los contratos inteligentes en la red principal. Este video muestra cómo crear un contrato simple que permita al propietario actual transferir la propiedad.
jfdesousa7
EspaVlog
4y
Aprende Solidity creando una lista de tareas
La mejor manera para aprender un nuevo lenguaje es creando un simple TodoList(Lista de tareas). para ello vamos a crear una simple lista de tareas en nuestro lenguaje favorito para crear contratos inteligentes
marilynjsteed
LeoFinance
4y
Published via Ecency
NFT : Create a good NFT
If u want to create a good nft, don't need to learn solidity. U must only have a good idea
tommycordero
Blockchain Jobs
4y
[JOBS] Blockchain Security Engineer | Polygon
Blockchain is always hiring! This is a placeholder listing for all Security team positions.
tomizha
LeoFinance
4y
What are the steps of becoming a blockchain developer?
In order to become a blockchain developer, one needs to be innovative, one needs to discover opportunities while the sun shines. In this day and age, if one attempts to develop ios apps, they will discover
life-hacker
Programming & Dev
5y
Published via Ecency
Solidity practice. Simple CRUD of Data
Source I recently started learning Solidity and hope to become a smart contract engineer one day, so I decided to start with some small functional contracts and progress slowly. I decided that the topic
brycelanders.eth
LeoFinance
5y
Learn to code smart contracts
To anyone looking to get into tech/ learn coding heres what ive learned to date. I am only 2 months in my journey so far but have picked it up quicker than i ever imagined. I always wondered why they were
← Latest
Older →
Discover communities
Explore communities
Create your community