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This Week I Learned (TWIL): Signature Standards in Ethereum and Diamond Proxies Let’s dive into two critical EIPs: EIP-191 and EIP-712. They play a key role in making Ethereum signatures more secure, readable, and versatile. 👇
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Why do we need these standards? ✅ Human-readable messages: EIP-712 shows structured, user-friendly signing prompts. ✅ Security: EIP-712 prevents replay attacks. ✅ Sponsored transactions: EIP-191 enables sending transactions on behalf of users.
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EIP-191: Basic Structure 📜 Format: 0x19<1 byte version><version specific data><data to sign> Examples of <1 byte version>: 🔹 0x00: Data with a validator 🔹 0x01: Structured data (EIP-712-compatible) 🔹 0x45: Personal_sign
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EIP-712: Structured Data Signing EIP-712 improves traditional message signing by: 🖼️ Adding structure for easier message readability. 🛡️ Defining fields explicitly to prevent signing unintended data. Let’s break it down! 👇
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Key Components of EIP-712 1️⃣ Domain Separator: It encodes metadata like app name, version, chain ID, and contract address. It ensures the signature is valid only within its intended domain.
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2️⃣ Hashing the Message: EIP-712 hashes the structured message to ensure integrity and prevent tampering.
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Finally, combine everything: The signature includes: 0x19 0x01 <domainSeparator> <hashStruct(message)> This ensures: 🔒 Security 🔍 Transparency for users EIP-712 = Better UX + Stronger Security 🚀
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Diamond Proxy Architecture Another gem from this week: Diamonds! 💎 They enable modular, upgradeable contracts via EIP-2535. Think of it as: 🏨 A hotel where: • Front desk = Diamond proxy • Services = Facets • Shared resources = Shared storage
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Why Diamonds? 💡 Modular: Break contracts into smaller, manageable parts. 🔄 Upgradeable: Update facets without changing the contract address. 🔗 Shared: Centralized storage for all facets. Smart contract engineering at its best! 🤖
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That’s a wrap for this week! 🛠️ Thanks as always to @cyfrin
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