Production HTTP client

Copy .env.example to .env for application configuration. The

template defaults to local mode without credentials. The SDK does not automatically

load environment files or read these variables; load them in your application and

pass them explicitly to the client. Treat blank optional values as undefined

(for example, process.env.FOURBTD_API_KEY || undefined). The offline examples

need no .env file. The template is included in the repository, not the npm tarball.

const fourBtd = new FourBTDClient({
  apiKey: process.env.FOURBTD_API_KEY,
  network: 'solana-devnet',
  baseUrl: 'https://your-backend.example.com',
  timeoutMs: 15_000,
  retries: 2,
  backoffMs: 100,
  maxBackoffMs: 10_000,
  jitter: 0.2,
});

An explicit baseUrl is required for non-local clients without a custom transport;

the SDK does not guess a production hostname. Base paths are supported. HTTPS is required

except for HTTP loopback development endpoints. URLs with credentials, queries or fragments

are rejected. Redirects are never followed. Supply server credentials only from a trusted server.