It is widely known that Ethereum's Layer 2 technology is currently the most successful Layer 2 solution. Compared to the scaling solutions of Polkadot and Cosmos, Layer 2 technology not only effectively inherits the security of Layer 1 but also allows for truly permissionless access to building Layer 2. As the pioneer of the blockchain ecosystem, Bitcoin's scalability has long been criticized, seriously impacting the development of its ecosystem.

As is well known, Bitcoin halving is scheduled in end of April 2024. But most people only are aware of Bitcoin halving every four years. They may not know the reason behind the for-year circle or why new Bitcoin blocks are minted every 10 minutes. The article will delve into the reasons behind the 10-minute interval for new Bitcoin blocks minting and and the occurrence of Bitcoin halving every four years. Bitcoin Github repo: https://github.com/bitcoin/bitcoin

In July 2023, the emergence of EigenLayer opened up a brand new market for re-staking, causing a stir in the industry. From the Total Value Locked (TVL), it is evident that each round of re-staking capacity is quickly filled, indicating a significant demand for re-staking in the market. In this article, we will delve into the principles and strategies of this track to provide a deeper understanding.

The highly anticipated Ethereum Cancun upgrade was finally completed on March 13, 2024, marking a significant hard fork upgrade for Ethereum in 2024. This upgrade primarily helped Ethereum improve network efficiency and reduce transaction fees, further driving the development of Ethereum's Layer 2 solutions.

随着Damus最近的大火，其内置的比特币闪电网络Lightning Network打赏功能也走进了大众的视野。闪电网络的比特币容量也随之猛增到5400枚，创下历史新高。那么下面我们就重点来介绍一下闪电网络的作用和工作原理。

近期damus社交软件大火，作为web3赛道率先上线app store的应用，很快引起了圈内圈外人士的关注。那么不少会有一个疑问，同样作为社交软件，web3赛道的damus相比于web2赛道的twitter和微博有什么优势，用户为什么要迁移到web3社交产品呢？ 首先，看下damus官方给出的web2社交的一些关键问题：

作为开始篇，主要想讲一下开发这款软件的初衷，顺便打个广告，哈哈。后续我会讲解APP开发的具体过程（包括前端、APP和后端），做得不好的地方欢迎大家来指出。

目录contracts/DrawNFT.sol

目录contracts/DrawToken.sol