YachtDice/Assets/Scripts/Economy/CurrencyBank.cs

using System;
using UnityEngine;

public sealed class CurrencyBank : MonoBehaviour
{
    [SerializeField] private int startingBalance = 500;

    private int balance;

    public int Balance => balance;

    public event Action<int> OnBalanceChanged;

    private void Awake()
    {
        balance = startingBalance;
    }

    public void Add(int amount)
    {
        if (amount <= 0) return;

        balance += amount;
        OnBalanceChanged?.Invoke(balance);
    }

    public bool Spend(int amount)
    {
        if (amount <= 0) return false;
        if (balance < amount) return false;

        balance -= amount;
        OnBalanceChanged?.Invoke(balance);
        return true;
    }

    public bool CanAfford(int amount) => balance >= amount;

    public void SetBalance(int value)
    {
        balance = Mathf.Max(0, value);
        OnBalanceChanged?.Invoke(balance);
    }
}