START HERE · 15 MINUTES
Build your first hosted ITZApp
Understand the shape of an ITZApp, prepare its web files, package it, and learn how an application asset becomes a network-served experience.
Start the interactive tutorial →HTML
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ITZA
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ITZA
03 / TUTORIALS
Learn by building something real.
Each tutorial will eventually be a two-pane workspace: code on one side, a running result on the other. On mobile, the panes become two simple tabs. For now, choose the path that matches what you want to make.
THE BASICS
Get a complete app moving.
Your first contract
Write a WASM contract that accepts JSON input, applies simple logic, and returns a useful result. Think of it as your server-side application, running deterministically on ITZA.
Open tutorial →Connect them!!
Call the contract from your ITZApp, pass required wallets and parameters, and render the result in the browser.
Open tutorial →Network-wide simplified login
Give users a consistent sign-in flow instead of asking ordinary people to understand unfriendly keys on their first visit.
Open tutorial →Find a wallet by username
Register a friendly username across the network, look it up when someone needs to be found, and keep the wallet address underneath the experience.
Open tutorial →DATA & STORAGE
Make state useful.
Store app-data on-chain
Use contract-owned state for records your application needs to verify, retrieve, and update through its rules.
Open tutorial →Store customer data in their wallets
Design data that belongs to the customer, not just to the app, and make permissions and ownership visible.
Open tutorial →Store files
Create an asset, track its ownership and rent, then upload the file data as a verifiable application object.
Open tutorial →Use native SQL
Build relational features in a WASM contract with SQL-backed state, while keeping contract execution and access rules explicit.
Open tutorial →LIVE EXPERIENCES
Make the app feel alive.
Direct communication in real time
Connect users directly in a few lines of code, then add end-to-end encryption when messages should be readable only by participants.
Open tutorial →Realtime event notifications
React to network and contract events as they happen, without building a polling loop.
Open tutorial →Web app push notifications
Walk through browser notification permission, FCM setup, and a user-friendly event-to-notification path.
Open tutorial →VALUE & TRUST
Build financial features carefully.
Transfer funds to someone
Create a clear person-to-person transfer, estimate it, show the recipient and currency, then submit and monitor the result.
Open tutorial →Fund an app or contract
Transfer value to an application or contract wallet now, then retrieve and use it later through contract rules.
Open tutorial →Handle currencies
Keep balances, transfer quantities, permitted rent currencies, and fee behavior explicit in both UI and contract logic.
Open tutorial →Use Proof-of-Work
Request, complete, and claim a PoW token when an application needs a lightweight proof that work was performed.
Open tutorial →The shape of an app
Keep the first version small.
A useful first milestone is a web page that can identify a user, read a wallet, call one contract function, and show the result.
A simple client-side direction
const wallet = await itza.network_login(username, password, clusterId);
const result = await itza.estimate_tx(contractCall);
render(result);