Build
A builder's manual for the network
Start with one command, send your first transaction in minutes and deploy a program before lunch.
Quickstart · Node 20+
npx create-ostrel-app@latestQuickstart
From zero to testnet in four steps
Scaffold
Create an app with a program, a front end and tests, wired to testnet.
Fund
Get free test tokens from the faucet for your development account.
Deploy
Deploy the program with “ostrel deploy” and open the explorer link it prints.
Ship
Point the same code at mainnet when you are ready, or apply for a grant first.
SDKs
Same concepts in every language
Accounts, programs and transactions look the same whether you write TypeScript for a web app, Rust for a program or Python for data work.
@ostrel/sdk
Web apps, wallets and back ends.
ostrel-sdk
Programs and high-performance services.
ostrel-py
Scripts, bots and analytics.
import { Client, Keypair, osl } from "@ostrel/sdk";
const client = new Client(process.env.OSTREL_RPC_URL ?? "https://rpc.testnet.ostrel.example");
const payer = Keypair.fromEnv();
// Send 1.5 OSL and wait until the block is final.
const receipt = await client.transfer({
from: payer,
to: "mara.osl",
amount: osl("1.5"),
});
console.log(receipt.status, receipt.finalizedInMs); // "final" 412Tooling
Everything around the code
Official
CLI
Create accounts, deploy programs and inspect transactions from the terminal with ostrel.
Official
TypeScript SDK
@ostrel/sdk for web apps, wallets and back ends.
Official
Rust SDK
ostrel-sdk for programs and high-performance services.
Official
Python SDK
ostrel-py for data work, bots and scripts.
Official
Local network
Run a single-node network with instant blocks for tests.
Official
Explorer
Look up any transaction, account, program or block.
Ecosystem
Pilot
Fork mainnet state onto your laptop and replay transactions.
Ecosystem
Cairn
Index program events into Postgres or GraphQL.
Courses
Learn by shipping
Your first program
Write, test and deploy a tip jar to testnet.
Beginner · 45 min
Wallet-light apps
Passkeys and session keys for apps people use daily.
Intermediate · 1 h 20 min
Designing for fee lanes
Keep a busy program fast and inexpensive under load.
Advanced · 1 h
Building something people will use?
Grants of up to 500,000 OSL, paid in milestones, with mentors from the core team.