Learn INK with Real Code Examples
Updated Nov 25, 2025
Architecture
Rust compiler -> Wasm bytecode
Storage structs define state
Messages as external callable functions
Event logging integrated in Wasm
Metadata defines contract ABI for frontends
Rendering Model
Rust code -> ink! macros -> Wasm bytecode
Contract metadata for ABI
Storage struct layout
Event emission model
Cross-contract call ABI
Architectural Patterns
Storage struct for state
Messages as public API
Events for logging
Traits for modular calls
Composable multi-contract logic
Real World Architectures
DeFi lending & staking
NFT marketplaces
On-chain governance modules
Cross-contract DeFi protocols
Parachain-specific applications
Design Principles
Safety and type guarantees
Wasm-native execution
Rust ecosystem leverage
Predictable gas and storage
Composable contracts
Scalability Guide
Use traits for modularity
Keep Wasm size manageable
Optimize storage layout
Split contracts logically
Use metadata efficiently
Migration Guide
Rewrite Solidity/Vyper contracts in Rust + Ink!
Replace storage variables with #[ink(storage)]
Rewrite public functions as #[ink(message)]
Map events using #[ink(event)]
Deploy on Substrate instead of EVM