Design (LLD) Blockchain - Machine CodingSubhahu Jain·Dec 30, 2022·8 min readTable of contentsCodeIssues in Above Design1️⃣ Block Creation Is Not Thread-Safe (Critical)ProblemRace ConditionImpactSolution2️⃣ No Transaction Pool (Mempool) SemanticsCurrentMissingReal BlockchainSolution3️⃣ Proof of Work Is Incomplete (Major Design Gap)ProblemMissingCorrect PoW FlowSolution4️⃣ No Fork Handling (Critical Blockchain Concept)CurrentMissingReal ScenarioSolution5️⃣ Consensus Is Global, Not Per Node (Design Flaw)ProblemIssueSolution6️⃣ Node Synchronization Is Synchronous & BlockingProblemIssuesReal BlockchainsSolution7️⃣ No Digital Signatures (Security Hole)Missing EntirelyCurrentImpactSolution8️⃣ No Double-Spend PreventionMissingExample FailureSolution9️⃣ No Block Size or Gas LimitProblemMissingSolution🔟 Chain Validation Is O(N) Every TimeProblemImpactExpectedSolution11️⃣ Genesis Block Is Hardcoded IncorrectlyProblemIssuesSolution12️⃣ P2P Network Is Conceptual OnlyMissingSolutionJavaScriptPythonGeneral ProgrammingProgramming BlogsGo Language
