محرك الحالة غير القابل للتغيير

# Create a multi-currency wallet
curl -X POST https://connect.fernel.io/v1/wallets \
  -H "Authorization: Bearer <token>" \
  -H "Content-Type: application/json" \
  -d '{
    "customer_id": "cust_8f3a2b",
    "currencies": ["EUR", "USD", "GBP"],
    "type": "customer_emoney"
  }'

# Response
{
  "id": "w_a1b2c3d4",
  "accounts": [
    { "currency": "EUR", "iban": "DE89...", "balance": "0.00" },
    { "currency": "USD", "account_number": "...", "balance": "0.00" },
    { "currency": "GBP", "sort_code": "...", "balance": "0.00" }
  ],
  "status": "active",
  "created_at": "2026-02-21T09:00:00Z"
}