Tutorials

ink! smart contract storage patterns: Mapping, Lazy and enums

Rust Smart Contracts #6: Storage Patterns in ink! You Can Actually Maintain

Stop dumping everything into one big storage struct. Learn the core storage patterns in ink!—single values, mappings, many-to-many relations, and lazy configs—so your contracts stay readable, cheap to run, and easy to extend.

ink! Smart Contract Access Control: from only_owner to Role Permissions #5

Use a kitchen‑door analogy to explain env().caller(), only_owner checks, Result‑based errors, and role mappings in ink!, with minimal runnable examples so beginners can copy, run, and ship safer contracts.

ink! smart contracts testing: unit tests and e2e

Test ink! Contracts the Practical Way: Unit tests and a tiny e2e for beginners #4

Minimal runnable examples to test Rust + ink!: from #[ink::test] off-chain unit tests to a small e2e. Includes setup, full code, typical pitfalls, and fixes.

ink! smart contracts: events and error handling (avoid panic)

Stop Panicking on Failure: Production‑Ready ink! Events & Error Handling

Beginner‑friendly, production‑oriented ink! walkthrough: emit events for observability, return typed errors instead of panics, and ship with a minimal runnable example plus test assertions.

Rust Macros 2.0 starter guide cover illustration

Rust Macros 2.0 Starter Guide: Build Code Like Lego

A panoramic Rust Macros 2.0 guide: unify macro namespaces, master the TokenStream pipeline and macro hygiene, and migrate from macro 1.0 to macro 2.0 metaprogramming with practical examples.

Skill Seeker: Turn Docs Into Claude-Ready Skill Packs (Hands-on Guide)

Stop slogging through docs: convert any framework site into a Claude skill pack in minutes. Practical workflow covering CrewAI, AutoGen, LangGraph and more.

OpenSpec Installation and Project Initialization Guide

How to install and run OpenSpec for this repository and your team: npx (no install), global install, binary/internal distribution, and quick validation steps.

Master OpenSpec in the AI Era: A Practical Guide to SDD (Spec‑Driven Development)

A hands-on, SEO-friendly primer on Spec‑Driven Development with OpenSpec: change proposals, specs, tasks, validation, and release — plus a 10‑minute quickstart and best practices.

Trimming a Docker image from 2GB to 50MB

I Slimmed a Docker Image from 2GB to 50MB: A Hands-on Postmortem

The real steps and trade-offs I took to cut a Docker image from 2GB down to 50MB — pitfalls, decisions, and practical takeaways without the fluff.

Rust + Axum Async Microservice Guide: Job Queue, Retries, and Graceful Shutdown

Build a production-ready async microservice with Rust and Axum: job queue, background workers, exponential backoff retries, and graceful shutdown. Includes full project structure and Docker example.