Category：Blockchain
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BTCs create blockchain plus
Business has its standpoint, and the economy is divided into regions, so advertising and marketing also have hosts and guests, and different home games play different ways. In the past, the home field of advertising marketing has undergone a transformation from the real economy to the online economy and then to the Internet platform. The […]
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NFTRainbow API User Guide
NFTRainbow API User Guide NFTRainbow API provides convenience for web2 users without web3 technology stack to publish their own NFT on the conflux platform. This article will describe in detail how to use NFTRainbow API from the perspective of web2 users. Preparation user registration Enter the NFTRinbow API service page for user registrationAfter the user […]
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Contract language framework of Substrate contract
foreword “Substrate Contract” is used to introduce a series of knowledge related to the Wasm contract system in Substrate. This book is sponsored by Patract (https://patract.io/) led the writing and Aten was in charge. The repository for this book is located athttps://github.com/patractlab…, People with lofty ideals are welcome to contribute to this book together. This […]
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The Open Atom Open Source Summit ended, and Baidu Superchain led the establishment of the XuperCore Open Source Working Group
On the morning of July 29, 2022, the blockchain sub-forum of the 2022 Open Atom Global Open Source Summit was successfully held in Beijing Yichuang International Convention and Exhibition Center. The event was hosted by Baidu Superchain, co-organized by China Unicom Digital Technology, Qulian, Treemap Chain, etc. Li Ming, Director of the Blockchain Research Office […]
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10 GitHub repositories every developer should know
author:Paweltranslate:LeanCloud Not only is GitHub home to the most interesting open source projects on the internet, but it’s also a great place to share everything from free books to APIs, product roadmaps to project ideas to project proposals. However, due to the sheer volume, you might have a hard time finding repositories that are actually […]
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Baidu Blockchain Xiao Wei: Web 3.0 brings at least 10 years of sustainable development opportunities to the blockchain
On July 29, at the blockchain sub-forum of the 2022 Open Atom Global Open Source Summit, Baidu Superchain and its partners jointly established the XuperCore open source working group, which will help more professional developers and enterprises make good use of the blockchain and prosper the blockchain Open source ecology. At present, blockchain manufacturers are […]
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Record a virus cleanup in operation and maintenance
background The server cpu of a project server is overloaded, and the top command shows that there is a wave of high-consumption cpu processes running, and the execution programs are all linux commands, as shown in the figure It can basically be confirmed that it is a mining virus. Unlike previous mining viruses, the names […]
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Smart contract security – delegatecall (1)
In the previous content, I learned that storage uses slots to store data. The delegatecall function has an interesting feature: when the external call using the delegatecall function involves the modification of the storage variable, it is modified according to the slot position instead of the variable name.for example:Contract AContract BWhen contract B calls the […]
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As the hottest distributed storage project on the blockchain – what is the difference between Swarm and IPFS?
What are Swarms? Brief description: Swarm is an official part of the Ethereum project. It is mainly invested and developed by the Ethereum Foundation, allowing mining pool storage, bandwidth and computing resources to support enterprise applications based on an Ethereum network. Wei Yi’s national governance token is BZZ, which is used to analyze data information […]
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Smart contract security – delegatecall (2)
This time, we will talk about a more complex contract vulnerability case when using the delegatecall function. target contractVulnerability Analysis The target of this attack is still to obtain the owner permission in the HackMe contract. We can see that in the two contracts, except for the constructor in the HackMe contract, which can modify […]
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Swarm, epns, mask and other lesser-known alternative ecological projects on Ethereum
The lesser-known alternative ecological projects of Ethereum do not belong to traditional tracks such as transactions, lending, games, NFTs, and expansion, and are even difficult to classify according to traditional classification methods, but many of them have the potential to become an important part of the Ethereum ecosystem. Infrastructure becomes a middleware-like existence and meets […]