Build

Connect, deploy, bridge

RPC endpoints, chain ID, the canonical bridge, and SDKs. Build government-grade and cross-border apps on the network.

Network params

Network params.

The connection details, in mono with copy buttons. Everything here is testnet pre-mainnet. The chain ID reads // confirm until it is set.

network params · testnet

Network: OpenStateStack Testnet
Chain ID: // confirm — QUESTIONS_FOR_HUMAN.md
RPC URL
Currency: OSS
Explorer: /explorer

Copy-pasteable, and clearly testnet.

The network is EVM-equivalent, so your existing tooling connects unchanged. Point an RPC client at the testnet endpoint and read the chain.

RPC and endpoints

The bridge

The bridge.

A canonical bridge moves assets between Ethereum L1 and the network. Deposits and withdrawals follow the documented flow — the site never connects a wallet or signs on your behalf.

The canonical bridge.

How deposit and withdraw work between Ethereum and the network, the bridge contract address, and why nothing on this site initiates a transaction for you.

Read the bridge →

Deploy

Deploy.

The network is EVM-equivalent: Solidity contracts, bytecode, and tooling work unchanged. Deploy against the testnet RPC, then follow the full guide in the docs.

EVM-equivalent

Contracts that compile and run on Ethereum compile and run here. No rewrites, no custom compiler, no opcode surprises. The example below targets testnet.

# Deploy a contract to the OpenStateStack testnet (testnet)
forge create \
  --rpc-url $OSS_RPC_URL \
  --private-key $DEPLOYER_KEY \
  src/Registry.sol:Registry

Deploy to the networkFull deploy guide

SDKs

SDKs.

Standard Ethereum SDKs connect with no special client. Set OSS_RPC_URL to a testnet endpoint and read the chain.

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider(process.env.OSS_RPC_URL); // testnet
const height = await provider.getBlockNumber();
console.log(height);

SDK reference

Connected. Now build.

Open the explorer to debug against live data, or read the full developer docs.

Run a node Open the explorer