Kart Doğrulama

POST /api/v1/validation/card

curl -X POST https://identity.payven.com.tr/api/v1/validation/card \
  -H "Authorization: Bearer $PAYVEN_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{ "number": "4546711234567894" }'

{
  "is_valid":     true,
  "luhn_valid":   true,
  "length_valid": true,
  "length":       16,
  "bin":          "454671",
  "masked_number":"454671******7894",
  "schema_type":  "visa",
  "bank_bin": {
    "id":           "abc-...",
    "bin_start":    "454671",
    "bin_end":      "454671",
    "card_scheme":  "visa",
    "card_type":    "credit",
    "card_program": "bonus",
    "country":      "TR"
  },
  "bank": {
    "id":            "8e3f5c12-...",
    "code":          "GARANTI",
    "name":          "Garanti BBVA",
    "bkm_member_id": "62"
  },
  "error_message": null
}

{
  "is_valid":     false,
  "luhn_valid":   false,
  "length_valid": true,
  "length":       16,
  "bin":          "454671",
  "masked_number":"454671******7895",
  "schema_type":  "visa",
  "bank_bin":     null,
  "bank":         null,
  "error_message":"Kart numarası Luhn checksum'ı geçmiyor."
}

async function validateCardOnBlur(cardNumber) {
  const digits = cardNumber.replace(/\D/g, "");
  if (digits.length < 13) return;

  // Backend BFF üzerinden — frontend Identity'e direkt token taşımayın
  const res = await fetch("/api/validation/card", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({ number: digits }),
  });
  const result = await res.json();

  if (!result.is_valid) {
    showFieldError("card_number", result.error_message);
    return;
  }

  showBankLogo(result.bank?.code);
  showSchemeIcon(result.schema_type);
  if (result.bank_bin?.card_type === "debit") {
    hideInstallmentDropdown();
  }
}