feat: add configurable transaction amount limit with PAYME_TRANSACTIO…

[ganiyevuz]

Menda yaqinda summa bilan bog'liq quyidagicha hatolik kuzatildi

Request from payme:

{
  "time": "2025-04-21T19:25:32.303Z",
  "body": {
    "data": {
      "method": "CreateTransaction",
      "params": {
        "id": "68069b976111b37899d50215",
        "time": 1745263532241,
        "amount": 140000000,
        "account": {
          "order_id": "217"
        }
      },
      "url": "***************",
      "timeout": 30000
    }
  }
}

Response from server:

{
  "time": "2025-04-21T19:25:32.346Z",
  "body": {
    "data": {
      "error": {
        "code": -32400,
        "message": {
          "uz": "Tizimda xatolik yuzaga keldi.",
          "ru": "Внутренняя ошибка сервиса.",
          "en": "Internal service error."
        },
        "data": "numeric field overflow\nDETAIL:  A field with precision 10, scale 2 must round to an absolute value less than 10^8.\n"
      }
    }
  }
}

numeric field overflow
DETAIL:  A field with precision 10, scale 2 must round to an absolute value less than 10^8.

Men oylik tarif uchun 1400000 (1 million 400 ming) tolov qabul qilishim kerak edi lekin ushbu xatolik yuzaga keldi.
Bunda PaymeTransactions modelida amount = DecimalField(max_digits=10, decimal_places=2) yozilgan va generate_pay_link methodda amount = amount * 100 tolov check yaratish paytida tiyinga otkazish uchun.
Lekin raqamlar soni avval 7 honali edi va *100 sababli 9 honaga kopayib ketadi va bizda max_digits=10 bu bizga maksimal 8 honali butun va 2 honali qoldiq sonni saqlashga imkonini beradi lekin 9 yoki undan katta (10000000) 10 million kabi tolovlar yaratishda yana qoshimcha 2 hona qoshilib limitdan oshib ketadi

bunga quyidagicha yechim qildim:

#settings.py
PAYME_TRANSACTION_AMOUNT_MAX_DIGITS = 10



MAX_DIGITS = getattr(settings, "PAYME_TRANSACTION_AMOUNT_MAX_DIGITS", 10) + 2 # include 2 tiyyin digits


class PaymeTransactions(Model):
    ......
        amount = DecimalField(
        max_digits=MAX_DIGITS,
        decimal_places=2
    )

bu orqali foydalanuvchilar limitni ozlariga kerakli holatda ozgartirib olaveradilar defaul holatda esa 11 (99 999 999 99) to'qson to'qqiz million ....) va 2 honali tiyin gacha qabul qila olishadi va qoshimcha xatoliklarni oldini olish uchun system check va Exeption ham yozib qoydim. qoshimcha malumot uchun readme ni korishingiz mumkin