Lessons

Build a NEAR dApp

Learn

Build a NEAR dApp

Overview

01View vs Change Calls
02Connect a Wallet
03Calling Contract Methods
04Mini Project: Diploma Checker
05Final Project: Ship to Chain

Quiz

Build a NEAR dApp · 5 questions

Build a NEAR dApp quiz

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

1. What is the difference between a view call and a change call?

View calls need a wallet; change calls do notA view call reads state for free with no signature; a change call is a signed transaction that costs gasThere is no differenceView calls can only be made by the contract owner

2. What do official NEAR docs recommend for new wallet integrations?

Paste a private key into the page@hot-labs/near-connect with near-api-jsOnly Wallet Selector, which they still recommend for new appsA custom RPC you host in the browser with a seed phrase

3. What does NEAR Wallet Selector (the older stack this site still mints with) do for a dApp?

It gives one API and modal to sign in and sign transactions with many wallets, like MyNearWallet and MeteorIt mines blocksIt deploys contractsIt stores your seed phrase on the server

4. In a FunctionCall, deposit is measured in...

US dollarsTgas onlyyoctoNEAR, as a stringMegabytes

5. After a successful change call you should...

Assume the UI is right and close the laptopRe-read state with a view callDelete the contractSwitch to mainnet immediately

Final Project: Ship to Chain

That was the last track. Keep going in the Playground, or take the NEAR diploma quiz.

Retr0 Academy

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

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