カード決済

// 1. APIで決済を作成
const response = await fetch('https://api.sandbox.zafapay.com/v1/payments', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer YOUR_ACCESS_TOKEN',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    amount: 100,
    currency: 'usd'
  })
});

const payment = await response.json();

// 2. ホスト型チェックアウトにリダイレクト
window.location.href = payment.payment_url;

// 3. ユーザーはホストページで決済を完了
// 4. success_redirect_url または failure_redirect_url にリダイレクト

{
  "amount": 1000,
  "currency": "jpy",
  "external_id": "order_12345",
  "success_url": "https://your-site.com/orders/12345/thanks",
  "failure_url": "https://your-site.com/orders/12345/failed",
  "cancel_url": "https://your-site.com/orders/12345/cancelled"
}

https://your-site.com/orders/12345/thanks?request_id=req_xxx&transaction_id=txn_xxx&status=succeeded

// ステップ1: オーソリ
const payment = await createPayment({
  amount: 100,
  currency: 'usd',
  capture_method: 'manual'  // オーソリのみ
});

// ステップ2: キャプチャ（課金準備完了時）
await fetch(`https://api.sandbox.zafapay.com/v1/payments/${payment.transaction_id}/capture`, {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer YOUR_ACCESS_TOKEN'
  }
});