const sf = new ShadowFeed({
  privateKey: process.env.AGENT_PRIVATE_KEY!,
  network: 'mainnet',
  agentName: 'My Research Agent',
  baseUrl: 'https://api.shadowfeed.app',
  timeoutMs: 30000,
});

// Without 0x prefix
privateKey: 'abc123def456...'

// With 0x prefix
privateKey: '0xabc123def456...'

// Good — environment variable
const sf = new ShadowFeed({
  privateKey: process.env.AGENT_PRIVATE_KEY!,
  network: 'mainnet',
});

// Bad — hardcoded key
const sf = new ShadowFeed({
  privateKey: 'abc123...', // NEVER do this
  network: 'mainnet',
});

const sf = new ShadowFeed({
  privateKey: process.env.AGENT_PRIVATE_KEY!,
  network: 'mainnet',
  agentName: 'Alpha Hunter Bot',
});

sf.address  // → 'SP2PBB...' (derived from private key)
sf.baseUrl  // → 'https://api.shadowfeed.app'
sf.network  // → 'mainnet'