ink! Smart Contracts
Welcome to the smart contracts section of the Developer Hub!
Because Substrate supports Wasm smart contracts, it means that any language that can compile to Wasm could be used to write these contracts. ink! is Parity's answer for writing smart contracts using the Rust programming language.
ink!
ink! is a Rust-based embedded domain specific language (eDSL) for writing Wasm smart contracts specifically for the Contracts pallet. The main goals of ink! are user friendliness, conciseness, and efficiency.
Contract Components
ink! should feel familiar to developers who have programmed using other modern smart contract languages. The skeleton of a contract has all of the same components that you might expect:
- Events
- Storage
- Deployment (Constructor) Function
- Public Functions
- Internal functions
In ink!, mutability and visibility are explicitly defined per contract function. In these functions,
you gain access to a number of common Substrate types like AccountId, Balances, Hash, etc.
Additionally, you gain access to commonly used environment variable like the caller, and more!