Get Coupons Status

{
  "name": "get_coupons_status",
  "desc": "Get D-ASA coupons status",
  "readonly": true,
  "args": [],
  "returns": {
    "type": "(uint64,uint64,uint64,(uint64,uint64),bool)",
    "desc": "Total coupons, Due coupons, Next coupon due date, (Day count factor numerator, Day count factor denominator) , All coupons due paid"
  }
}

The next coupon due date value MUST be 0 if all coupons are due.

The day count factor values MUST 0 if the method is called before the issuance date or if all coupons are due.