Skip to main content

Get started

You will need​

  • Node.js >= 20
  • A Catalyst JSON-RPC URL

Steps​

1) Install the SDK​

npm install @catalyst/sdk

2) Connect to RPC and fetch the tx signing domain​

import { RpcClient, getTxDomain } from '@catalyst/sdk';

const client = new RpcClient('https://testnet-eu-rpc.catalystnet.org');

const domain = await getTxDomain(client);
console.log({
  chainId: `0x${domain.chainId.toString(16)}`,
  networkId: domain.networkId,
  genesisHashLen: domain.genesisHash.length,
});

Verify​

Your domain fetch should succeed and genesisHashLen should be 32.

Troubleshooting​

  • Intermittent signature failures behind a load balancer: ensure you use getTxDomain (single-call domain) rather than fetching chain identity via multiple RPC calls.
  • Wrong network: compare network_id / chain_id against the wallet defaults (testnet) before signing.