Lessons

NEAR Smart Contracts

NEAR Smart Contracts

NEAR Smart Contracts · 6 questions

NEAR Smart Contracts quiz

Answer every question, then score the quiz. The result is saved in this browser.

1. Which tools do current NEAR docs recommend for building and deploying a Rust contract?

Truffle and Hardhat onlycargo-near and near-cli-rs (`near`)The deprecated Node near-cli plus RemixMetamask

2. Why is get_greeting a view method in near-sdk?

It is marked payableIt only takes &self and does not write stateIt attaches 1 yoctoNEARView methods cannot exist in Rust

3. Why does every near_sdk::store collection need a unique prefix?

To look pretty in the explorerTo namespace its storage keys so two collections cannot collidePrefixes are optionalThe prefix is the account name

4. If a cross-contract call fails, what happens to state writes you already made in the calling method?

They always roll back automaticallyThey are not rolled back; you must undo them in the callback if neededThe whole chain haltsThe deposit is doubled

5. Which kind of access key can transfer NEAR and attach deposits?

A full-access keyA function-call keyA view keyA storage key

6. How do you create a faucet-funded testnet account with near-cli-rs?

near mine --mainnetnear create-account <id> --useFaucet --networkId testnetSend real NEAR firstnear login is the only way

Retr0 Academy

A Web3 developer school on NEAR, built at NEAR HACKATHON. Designed by Sina Jalilian. Progress stays in this browser.