# read\_only\_call\_function

通过传入函数名称及参数来调用该合约内的只读函数。

## 方法定义

```python
def read_only_call_function(self, function_name: str, *args: Optional[Any]) -> Optional[Any]
```

## 参数说明

| 参数             | 类型             | 说明   |
| -------------- | -------------- | ---- |
| function\_name | str            | 函数名称 |
| \*args         | Optional\[Any] | 函数参数 |

## 返回值

| 类型             | 说明      |
| -------------- | ------- |
| Optional\[Any] | 只读函数返回值 |

## 示例代码

```python
# 调用只读函数
balance = contract.read_only_call_function(
    "balanceOf",    # 函数名
    "0x..."        # 账户地址
)
if balance is not None:
    print(f"Balance: {balance}")

# 调用多参数的只读函数
result = contract.read_only_call_function(
    "allowance",    # 函数名
    "0x...",       # owner 地址
    "0x..."        # spender 地址
)
```


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