Ink! Whitelist Access - Ink Typing CST Test

Ink! Whitelist Access — Ink Code

Only whitelisted users can perform a restricted action.

#[ink::contract]
mod whitelist {
	#[ink(storage)]
	pub struct Whitelist {
		owner: AccountId,
		allowed: ink::storage::Mapping<AccountId, bool>,
	}

	impl Whitelist {
		#[ink(constructor)]
		pub fn new() -> Self {
		Self { owner: Self::env().caller(), allowed: ink::storage::Mapping::new() }
		}

		#[ink(message)]
		pub fn add(&mut self, user: AccountId) {
		assert!(self.env().caller() == self.owner);
		self.allowed.insert(user, &true);
		}

		#[ink(message)]
		pub fn restricted(&self) {
		assert!(self.allowed.get(self.env().caller()).unwrap_or(false));
		}
	}
}

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.

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