Testnet

• contracts
• subgraph endpoint
• builder API endpoint
• default Pimlico sponsor URL

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Example

const client = await OstiumClient.createDelegatedAndGasless({
  delegatePrivateKey: process.env.DELEGATE_PRIVATE_KEY as `0x${string}`,
  traderAddress: '0xTraderAddress',
  testnet: true,
});

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Notes

• the default testnet subgraph endpoint is https://builder.prod.bedrock.ostium.io/v1/subgraph/gn?chainId=421614, the same builder API as mainnet with the Sepolia chain id
• if you omit pimlicoUrl in gasless modes, the SDK uses the default Sepolia sponsor URL when testnet: true
• you can still override rpcUrl, subgraphUrl, builderApiUrl, or pimlicoUrl manually
• make sure the trader account, approvals, and delegation setup all happen on the same network