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Ink! Immutable Config Example - Ink Typing CST Test

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Ink! Immutable Config Example — Ink Code

Shows how to use immutable data in Ink!.

#[ink::contract]
mod config {
	#[ink(storage)]
	pub struct Config {
		config: u64,
	}

	impl Config {
		#[ink(constructor)]
		pub fn new(num: u64) -> Self {
		Self { config: num }
		}

		#[ink(message)]
		pub fn get(&self) -> u64 { self.config }
	}
}

Ink Language Guide

Ink! is a Rust-based eDSL (embedded domain-specific language) for writing smart contracts on the Substrate blockchain framework. It emphasizes safety, efficiency, and tight integration with Polkadot and Substrate ecosystems.

Primary Use Cases

  • ▸High-security smart contracts
  • ▸DeFi protocols on Substrate
  • ▸NFT minting and marketplaces
  • ▸On-chain governance modules
  • ▸Wasm-based blockchain apps

Notable Features

  • ▸Rust-based syntax
  • ▸Compile-time type safety
  • ▸Wasm target for Substrate
  • ▸Macros for contract boilerplate
  • ▸Support for storage, events, and messages

Origin & Creator

Ink! was created by Parity Technologies, the team behind Substrate and Polkadot, to provide a safe Rust-based smart contract language for WebAssembly chains. Initial development started around 2018.

Industrial Note

Ink! is primarily used in Substrate-based chains and Polkadot parachains, for high-assurance contracts in DeFi, on-chain governance, NFT minting, and other blockchain-native applications.

More Ink Typing Exercises

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Practice Other Languages

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