Design (LLD) a cryptocurrency exchange platform - Machine CodingSubhahu Jain·Jul 15, 2023·7 min readTable of contentsIssues in above design🔥 Problem 1: Wallet Uses double for Money (🚨 Critical)❌ What we Did❌ Why This Is a Fatal MistakeSolution🔥 Problem 2: Wallet Mutates State Directly (No Ledger)❌ What we Did❌ Why This Is DangerousSolution🔥 Problem 3: Orders Exist Without an Order Book❌ What we Did❌ What’s MissingSolution🔥 Problem 4: No Order Lifecycle❌ What we Did❌ Real Orders Have StatesSolution🔥 Problem 5: Balance Updates Are Observer-Based (Wrong)❌ What we Did❌ Why This Is UnsafeSolution🔥 Problem 6: Deposit & Withdrawal Are Local Operations❌ What we Did❌ Real Crypto RealitySolution🔥 Problem 7: No Reservation of Funds During Order Placement❌ What we MissedSolution🔥 Problem 8: Security Is Just Mentioned, Not Designed❌ What we Claimed❌ What ExistsSolution🔥 Problem 9: MVC Is a Red Herring❌ Why MVC Is Misused HereSolutionPythonBeginner DevelopersJavaScriptProgramming BlogsNode.js
