Best of Smart Contracts — 2024

  1. 1
    Article
    Avatar of aicyberinsightsAI Cyber Insights·1y

    Hacker Wins $47,000 by Outsmarting an AI Chatbot Designed Never to Transfer Money

    A hacker named p0pular.eth won $47,000 by outsmarting an AI chatbot called Freysa, which was designed to never approve money transfers. Despite 481 failed attempts by others, the hacker used social engineering and prompt manipulation to deceive the bot. The competition's fees escalated to $4,500 per message, with the prize pool reaching 13.19 ETH. This incident highlights vulnerabilities in AI systems, especially in financial contexts.

  2. 2
    Article
    Avatar of devtoDEV·2y

    Soroban by Example

    Soroban by Example is a comprehensive resource aimed at helping developers transition to the Soroban smart contract language using a project-based approach. This resource focuses on making familiar concepts from other languages accessible, providing an interactive documentation explorer, and using AI to generate customized contract variants. Despite initial challenges, the team developed several supportive tools, including a custom GPT model and an integrated playground. Future plans include a monorepo, multilingual support, and potential consultation services within the Soroban ecosystem.

  3. 3
    Article
    Avatar of coinsbenchCoins Bench·2y

    Advanced Blockchain: Mastering How Blockchain Works :)

    This post simplifies the complexities of blockchain technology using simple explanations and illustrative diagrams. It debunks common misconceptions such as the confusion between Bitcoin and blockchain. The post explains blockchain fundamentals, including its decentralized nature, the role of nodes, and how transactions are validated and stored. It also covers concepts like smart contracts, the Ethereum Virtual Machine (EVM), gas fees, and the difference between Ethereum and Bitcoin. Additionally, it tackles advanced topics like consensus mechanisms (PoW, PoS), and the importance of maintaining network security against double-spending and 51% attacks.

  4. 4
    Article
    Avatar of javarevisitedJavarevisited·2y

    How to become a Certified Web3 Professional in 2024?

    The post provides a detailed guide on becoming a certified Web3 professional in 2024, including the importance of blockchain fundamentals, smart contracts, and dApps. It emphasizes the growing demand for Web3 expertise and the career advantages of obtaining a Web3 certification. The post also outlines best practices and specific steps for developing a successful Web3 career, recommending reliable certification courses to ensure comprehensive learning and practical application of Web3 concepts.

  5. 5
    Article
    Avatar of coinsbenchCoins Bench·2y

    Smart Contracts: Discover the future of business automation!

    Smart contracts are software codes stored on the blockchain that automatically fulfill the terms of an agreement when executed. They enhance the security, transparency, and reliability of transactions by eliminating intermediaries and reducing fraud risks. Smart contracts reduce documentation costs, expedite transactions, and increase trust between parties. They are the basis for innovative solutions like DAOs and blockchain-based financial services.

  6. 6
    Article
    Avatar of coinsbenchCoins Bench·2y

    Decentralization: The Heart of Blockchain’s Power 🌍 looks at real-world scenarios and potential…

    Decentralization is a transformative feature of blockchain technology, offering security, transparency, and efficiency. This post explores a Solidity-based smart contract for decentralized voting, detailing its structure, functionality, and best practices for deployment and security. It also provides insights into development tools like Foundry, Hardhat, and Truffle, and outlines a process for integrating decentralized systems into various industries, ensuring compliance, efficiency, and user-friendly interaction.

  7. 7
    Article
    Avatar of coinsbenchCoins Bench·2y

    Blockchain

    Blockchain is a distributed immutable ledger that is completely transparent. It is used for various applications such as product tracking, smart contracts, health care, and international wire transfer. Hashing algorithm is important for ensuring the integrity of data in a blockchain.

  8. 8
    Article
    Avatar of coinsbenchCoins Bench·2y

    How to Learn Blockchain Development: A Step-by-Step Guide

    Learn how to effectively master blockchain development through a strategic, project-oriented approach. This guide outlines six essential steps: defining clear project goals, breaking down projects into manageable components, gathering relevant information, conducting thorough research, iterative learning of each component, and teaching what you've learned. These steps will help streamline your learning process and build robust blockchain solutions like an NFT marketplace or a decentralized application.

  9. 9
    Article
    Avatar of coinsbenchCoins Bench·2y

    Insecure Randomness in Smart Contracts

    Smart contracts on blockchain cannot achieve true randomness due to the deterministic nature of blockchains, pushing developers to use pseudo-random number generators (PRNGs). Methods relying on block properties or blockhashes are susceptible to miner tampering and predictability. External solutions like Chainlink VRF and onchain VRFs like Harmony VRF offer more secure random number generation but come with additional costs. The Signidice algorithm and the commit-reveal approach provide additional methodologies, each with their own sets of advantages and limitations. The choice of method depends on the specific requirements and incentives of the contract.

  10. 10
    Article
    Avatar of soliditySolidity·2y

    Solidity 0.8.27 Release Announcement

    The Solidity Compiler v0.8.27 introduces notable features like legacy support for custom errors with the require function, and caching of optimized Intermediate Representation (IR) to improve compilation performance. New support for transient storage variables is added to the parser, though not fully implemented for bytecode generation. The release also includes multiple optimizations and bug fixes. For detailed installation instructions, refer to the official documentation.

  11. 11
    Article
    Avatar of coinsbenchCoins Bench·2y

    🔐 Master Solidity: Must-Know Interview Questions for Ethereum Developers 🛠️ (Practical Only)

    Solidity expertise is critical for Ethereum developers, particularly during interviews that often include practical coding challenges. Key topics include differences between transfer and send functions, gas-efficient for loops, avoiding storage collisions in proxy contracts, and distinguishing between storage and memory in array handling. Other important areas are encoding data with abi.encode and abi.encodePacked, preventing inflation attacks in ERC4626 contracts, using custom errors versus require statements with error strings, and understanding function selector clashes and beacons in proxy contexts. Recognizing common pitfalls and applying best practices is crucial for succeeding in real-world Ethereum development.

  12. 12
    Article
    Avatar of coinsbenchCoins Bench·2y

    Understanding Solidity: A Simple simpleStorage Contract

    Smart contracts are essential for decentralized applications on the blockchain. This post explores a basic Solidity smart contract called `simpleStorage`, detailing how to store and retrieve data. It breaks down key components like the pragma directive, contract definition, state variables, and functions. Deployment tips using tools like Remix or Hardhat are also provided, along with use cases for future expansion.

  13. 13
    Article
    Avatar of coinsbenchCoins Bench·2y

    Solidity Tips and Trick

    Tips and tricks for learning Solidity, including using console.log, locking the pragma version, avoiding the Stack Too Deep error, splitting large contracts, reusing functions and structs, working with percentages, reading state variables, instantiating nested mappings, working with nested arrays, returning all elements in an array, iterating over a mapping, applying the principle of least privilege, validating external values, saving gas with events, using the uncheck keyword, understanding storage vs. stack variables, using keywords, choosing between mappings and arrays, and optimizing variable stacking.

  14. 14
    Article
    Avatar of soliditySolidity·2y

    Solidity 0.8.28 Release Announcement

    The Solidity Compiler v0.8.28 has been released, offering full support for transient storage state variables of value types, reduced memory usage during IR compilation, and faster compilation times. Key improvements include generating JSON representations of Yul ASTs only on demand and enabling per-contract pipeline configuration. Bug fixes and build system tweaks are also included. To upgrade, follow the installation instructions in the official documentation.

  15. 15
    Article
    Avatar of blockchain_squadBlockchain·2y

    Seeking Feedback on my Web3 Raffle Platform with Native Tokens and Charity Integration

    Javier introduces his Web3 project, RafflChain, a raffle platform where users buy tickets using USDC. The system donates 45% of the prize pool to charity, 50% to a winner, and keeps 5% for future raffles. He is seeking feedback on switching from ERC-20 to native tokens to simplify user experience and considering strategies to improve the initial prize pool to make the platform more attractive.

  16. 16
    Article
    Avatar of coinsbenchCoins Bench·2y

    Navigating the World of Smart Contracts: A Developer’s Roadmap

    Smart contracts automate contract execution, ensuring trust, transparency, security, accessibility, and immutability. Developers need skills in languages like Solidity, JavaScript, and Python, knowledge of tools like Truffle and Remix, and adherence to best practices. Smart contracts can be deployed after thorough testing and debugging, and can be maintained and updated using tools like Etherscan.

  17. 17
    Article
    Avatar of blockchain_squadBlockchain·2y

    Gas Fees In Ethereum: How Transactions Are Powered

    Gas is a unit that measures the computational effort needed for operations on the Ethereum network, such as transactions and smart contract execution. Users pay gas fees in Ether (ETH) to incentivize miners or validators. The gas limit is the maximum amount of gas a user will spend, while the gas price is the amount of ETH paid per unit of gas. High gas fees can lead to delays and higher costs during congestion, while Ethereum 2.0's shift to Proof of Stake and sharding aims to make transactions faster and cheaper.

  18. 18
    Article
    Avatar of cybersecurityinsidersCybersecurity Insiders·2y

    Benefits of Using Blockchain in Cybersecurity

    Blockchain technology offers significant benefits for cybersecurity by ensuring data integrity, reducing single points of failure through decentralization, and enhancing authentication with cryptographic keys. Its transparent and traceable transactions improve monitoring and forensic capabilities, while smart contracts automate and enforce security measures. Additionally, blockchain's decentralized nature provides resilience against DDoS attacks and enhances privacy protections through encryption methods.

  19. 19
    Article
    Avatar of coinsbenchCoins Bench·2y

    Automating Inheritance on the Blockchain with Etheritance

    Etheritance is a Solidity-based smart contract on the Ethereum blockchain designed to automate and secure the inheritance process. The contract allows parents or guardians to set conditions under which beneficiaries can withdraw funds, ensuring transparency and security. Key features include automated funds distribution, customizable conditions, and several security measures. While it has limitations such as handling simple inheritance structures and lacking dispute resolution mechanisms, future enhancements aim to address these issues.

  20. 20
    Article
    Avatar of coinsbenchCoins Bench·2y

    Speed Up Your Smart Contract Development in VSCode

    Struggling to remember import paths and boilerplate code when developing Solidity smart contracts? A new Solidity Snippets Extension for VSCode can help. It provides reusable pieces of code for imports and boilerplate from popular smart contract libraries like OpenZeppelin and Chainlink, significantly speeding up development by eliminating repetitive tasks. Contributions to the extension are welcome.

  21. 21
    Article
    Avatar of coinsbenchCoins Bench·2y

    Learning to Call Smart Contract Functions with Web3.js

    This post explains how to use web3.js to interact with smart contracts on the Ethereum blockchain. It covers topics such as integrating web3.js into a project, fetching contract address and ABI, instantiating a contract, reading from a contract, and paying to a contract. It also mentions how to listen to events emitted by a smart contract.

  22. 22
    Article
    Avatar of coinsbenchCoins Bench·2y

    Solidity error handling — notes on require, revert and assert

    Learn about different error handling techniques in Solidity, including 'require', 'revert', and 'assert'. Discover their differences and when to use each one.

  23. 23
    Article
    Avatar of coinsbenchCoins Bench·2y

    Solidity vs Rust vs Go: The Top Programming Language for Blockchain Technology

    Solidity, Rust, and Go are prominent programming languages in blockchain development, each offering unique strengths. Solidity is tailored for Ethereum smart contracts and dApps, Rust excels in performance and security especially in high-throughput systems like Solana and Polkadot, while Go is ideal for scalable blockchain infrastructures and cross-chain communication. The choice of language depends on project requirements, security needs, team expertise, and platform compatibility.

  24. 24
    Article
    Avatar of coinsbenchCoins Bench·2y

    A Basic Guide to Smart Contract Auditing for Beginners

    This guide outlines a systematic approach to auditing Ethereum smart contracts, covering essential steps such as understanding protocol documentation, identifying core contracts, mapping dependencies, focusing on public and external functions, and analyzing high-risk functions. Emphasis is also placed on the importance of testing, securing access controls, and considering upgradability and governance. While audits are crucial, they are not foolproof, and a multi-layered security strategy that includes continuous monitoring and bug bounty programs is recommended.

  25. 25
    Article
    Avatar of coinsbenchCoins Bench·2y

    Smart Contract Dev : Hands-On with Truffle, Ganache and Solidity

    This guide walks you through setting up a local Ethereum test environment using Truffle and Ganache, avoiding traditional testnets. It explains installing necessary tools, creating and compiling a smart contract with Solidity, and deploying and interacting with it using the Truffle console, providing a hands-on experience in smart contract development.

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