POST /v1/pimlico/sponsor

https://builder.prod.bedrock.ostium.io/v1/pimlico/sponsor?chainId=42161

https://builder.prod.bedrock.ostium.io/v1/pimlico/sponsor?chainId=421614

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

const client = await OstiumClient.createSelfAndGasless({
  traderPrivateKey: process.env.TRADER_PRIVATE_KEY as `0x${string}`,
  pimlicoUrl: 'https://your-bundler.example.com',
});