Solana Calculator Program #4 | Anchor Framework, Enums & Custom Errors 🚀

Let's build a real Solana program! In this episode, we build a fully functional Calculator program using the Anchor framework — implementing addition, subtraction, multiplication, division, square root, and modulus operations with custom error handling and enum-based operation routing. 🎯 *What You'll Learn in This Video:* ✅ Building a Complete Solana Program from Scratch ✅ Calculator Operations — Add, Subtract, Multiply, Divide, Sqrt, Modulus ✅ Enums in Anchor — CalculatorOperations with AnchorSerialize & AnchorDeserialize ✅ Pattern Matching — Using match for Operation Routing ✅ Custom Error Codes — #[error_code] and require! Macro ✅ Rust Traits in Solana — Add, Sub, Mul, Div, Rem from std::ops ✅ Account Validation — Signer & #[account(mut)] ✅ Integer Square Root — Using Rust's isqrt() ✅ Testing the Calculator Program 🔥 *Core Concepts You'll Master:* - *Enum-Based Routing:* Using AnchorSerialize/AnchorDeserialize enums to handle multiple operations in a single instruction - *Pattern Matching:* Rust's match expression to route calculator operations cleanly - *Custom Errors:* Defining error codes with #[error_code] and enforcing constraints with require! - *Rust std::ops Traits:* Leveraging Add, Sub, Mul, Div, Rem traits for arithmetic operations - *Account Structs:* Understanding Signer validation and mutable account references - *msg! Macro:* Logging computation results on-chain for debugging and verification - *declare_id!:* Linking your program to its on-chain address ⏰ *Timestamps:* 00:00 - Introduction 00:51 - Development on Solana Playground 02:09 - Defining Calculator Operations Enum 04:52 - Functionalities Implementation 16:42 - Program Deployment 19:27 - Custom Error Handling (require! macro) 25:22 - Account Struct & Signers 30:05 - PDA and CPI 34:51 - Wrap Up & Next Steps 💻 *Source Code & Resources:* - GitHub: https://github.com/hadihaider055/YT-Solana-Blockchain - Anchor Docs: https://www.anchor-lang.com/docs - Solana Docs: https://solana.com/docs - Rust std::ops: https://doc.rust-lang.org/std/ops/index.html 🔔 Subscribe for more blockchain and Web3 tutorials! 💬 Questions about the calculator, custom errors, or enums in Anchor? Drop them below! *Tags:* #Solana #AnchorFramework #SolanaDev #SolanaCalculator #RustSolana #BlockchainDevelopment #Web3 #CustomErrors #SolanaTutorial #AnchorProject #SmartContracts #BlockDevHadi --- 👨‍💻 *About This Tutorial:* This is Episode 4 of our complete Blockchain Development Series. We build a real Solana program — a Calculator program that demonstrates enums, pattern matching, custom errors, and arithmetic operations using the Anchor framework. 🔗 *Connect with me:* - GitHub → https://github.com/hadihaider055 - LinkedIn → https://linkedin.com/in/hadi-haider - Twitter → https://twitter.com/hadihaider15 - Facebook → https://www.facebook.com/hadihaider055/ - Instagram → https://www.instagram.com/hadi_.haider/ - Discord → https://discord.gg/MP4xtFhwun - Follow for more programming tutorials → https://www.youtube.com/@blockdev-hadi 📧 Business Inquiries → [email protected] ⭐ _If this helped you build your first Solana program, please give it a thumbs up and share!_