Dekont (Makbuz) İndirme

GET /api/v1/transfers/{id}/receipt/download   # PDF dosyası (binary)
GET /api/v1/transfers/{id}/receipt/base-64    # Base64-encoded string

curl https://transfer.payven.com.tr/api/v1/transfers/8e3f5c12-9a7b-4c8d-bc4e-2c963f66afa6/receipt/download \
  -H "Authorization: Bearer $PAYVEN_TOKEN" \
  -H "X-Tenant-Id: $TENANT_ID" \
  -o makbuz.pdf

HTTP/1.1 200 OK
Content-Type: application/pdf
Content-Disposition: attachment; filename="TRF-20260503-0001.pdf"
Content-Length: 47823

curl https://transfer.payven.com.tr/api/v1/transfers/8e3f5c12-9a7b-4c8d-bc4e-2c963f66afa6/receipt/base-64 \
  -H "Authorization: Bearer $PAYVEN_TOKEN" \
  -H "X-Tenant-Id: $TENANT_ID"

{
  "transfer_id":  "8e3f5c12-9a7b-4c8d-bc4e-2c963f66afa6",
  "receipt_no":   "TRF-20260503-0001",
  "filename":     "TRF-20260503-0001.pdf",
  "content_type": "application/pdf",
  "content":      "JVBERi0xLjQKJYCBgoMKMSAwIG9iago8PA..."
}

const res = await fetch(
  `https://transfer.payven.com.tr/api/v1/transfers/${transferId}/receipt/base-64`,
  { headers: { Authorization: `Bearer ${token}`, "X-Tenant-Id": tenantId } }
);
const { content, filename } = await res.json();

await mailer.send({
  to: customer.email,
  subject: "Transfer dekontunuz",
  attachments: [{ filename, content, encoding: "base64" }],
});