Helius 给代理商

npm install -g helius-cli    # Install CLI
helius keygen                 # Generate keypair
# Fund wallet with 1 USDC + ~0.001 SOL
helius signup --json          # Get API key (JSON output)

?api-key=YOUR_API_KEY

async function heliusRequest(url: string, data: object, maxRetries = 3) {
  for (let attempt = 0; attempt < maxRetries; attempt++) {
    const response = await fetch(url, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify(data),
    });

    if (response.ok) return response.json();

    if (response.status === 429) {
      const retryAfter = response.headers.get('Retry-After');
      const delay = retryAfter ? parseInt(retryAfter) * 1000 : Math.pow(2, attempt) * 1000;
      await new Promise(resolve => setTimeout(resolve, delay));
      continue;
    }

    if (response.status >= 500) {
      await new Promise(resolve => setTimeout(resolve, Math.pow(2, attempt) * 1000));
      continue;
    }

    throw new Error(`Request failed: ${response.status} ${await response.text()}`);
  }
  throw new Error('Max retries exceeded');
}

helius usage --json