curl --request GET \
  --url https://tonapi.io/v2/rewards/stats

{
  "apy": [
    [
      123
    ]
  ],
  "total_stake": [
    [
      123
    ]
  ]
}

{
  "error": "<string>",
  "error_code": 123,
  "details": {
    "required": 123,
    "available": 123
  }
}