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The First Thing I Check When I See Division in Solidity
Integer division in Solidity silently truncates remainders, creating precision bugs that can shift value between users and protocols. When auditing smart contracts, the key questions to ask are: can this division round down, who benefits from rounding, and can it be repeated at scale? Common vulnerable patterns include reward and share calculations. The fix is usually ordering operations to multiply before dividing. A checklist and a simple Foundry test approach are provided to identify and prove precision loss bugs.
Nguồn: https://coinsbench.com/the-first-thing-i-check-when-i-see-division-in-solidity-cb4e19619ebd. 8sync News chỉ tóm tắt và dẫn link; bản quyền nội dung thuộc tác giả và nguồn gốc.
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I Built a Gasless Web3 Escrow Platform on Base Sepolia in 48 Hours Here’s Every Bug That Almost Broke It
A developer built a milestone-based gasless escrow platform for Web3 freelancing on Base Sepolia in roughly 20 hours, combining Solidity smart contracts with Firebase Firestore for real-time UI sync. The architecture uses a dual-write pattern where Firestore handles UI state and the contract holds funds. The post details the tech stack (Next.js, Tailwind, ethers.js v6, Hardhat), key engineering wins like Firestore onSnapshot for sub-200ms real-time updates, and a significant debugging session caused by overly complex Firestore security rules creating an auth race condition. The fix was simplifying rules to a basic auth check for the MVP. Lessons include guarding subscriptions until wallet connection is confirmed, always passing error callbacks to Firestore listeners, and avoiding premature security over-engineering.