public void CloseAccount(AccountId accountId, Payment payment)
{
var userAccount = UserAccounts.Single(x => x.AccountId == accountId);
if (userAccount.State == UserAccount.UserAccountEnum.Closed)
{
throw new InvalidOperationException("Account is already closed");
}
Apply(new V1.AccountClosed(Id, accountId.Value, payment.Amount, payment.CurrencyCode));
//If all acounts are closed now, we also should finalize the clearance
if (!UserAccounts.Exists(x => x.State == UserAccount.UserAccountEnum.Open))
{
FinalizeClearance();
}
}