# ERC20 interface (IPoly.sol)

View Source: [contracts/interfaces/IPoly.sol](https://github.com/PolymathNetwork/polymath-core/tree/096ba240a927c98e1f1a182d2efee7c4c4c1dfc5/contracts/interfaces/IPoly.sol)

**IPoly**

see <https://github.com/ethereum/EIPs/issues/20>

**Events**

```javascript
event Transfer(address indexed from, address indexed to, uint256  value);
event Approval(address indexed owner, address indexed spender, uint256  value);
```

## Functions

* [decimals()](/polymath/api/ipoly.md#decimals)
* [totalSupply()](/polymath/api/ipoly.md#totalsupply)
* [balanceOf(address \_owner)](/polymath/api/ipoly.md#balanceof)
* [allowance(address \_owner, address \_spender)](/polymath/api/ipoly.md#allowance)
* [transfer(address \_to, uint256 \_value)](/polymath/api/ipoly.md#transfer)
* [transferFrom(address \_from, address \_to, uint256 \_value)](/polymath/api/ipoly.md#transferfrom)
* [approve(address \_spender, uint256 \_value)](/polymath/api/ipoly.md#approve)
* [decreaseApproval(address \_spender, uint256 \_subtractedValue)](/polymath/api/ipoly.md#decreaseapproval)
* [increaseApproval(address \_spender, uint256 \_addedValue)](/polymath/api/ipoly.md#increaseapproval)

### decimals

```javascript
function decimals() external view
returns(uint8)
```

**Arguments**

| Name | Type | Description |
| ---- | ---- | ----------- |

### totalSupply

```javascript
function totalSupply() external view
returns(uint256)
```

**Arguments**

| Name | Type | Description |
| ---- | ---- | ----------- |

### balanceOf

```javascript
function balanceOf(address _owner) external view
returns(uint256)
```

**Arguments**

| Name    | Type    | Description |
| ------- | ------- | ----------- |
| \_owner | address |             |

### allowance

```javascript
function allowance(address _owner, address _spender) external view
returns(uint256)
```

**Arguments**

| Name      | Type    | Description |
| --------- | ------- | ----------- |
| \_owner   | address |             |
| \_spender | address |             |

### transfer

```javascript
function transfer(address _to, uint256 _value) external nonpayable
returns(bool)
```

**Arguments**

| Name    | Type    | Description |
| ------- | ------- | ----------- |
| \_to    | address |             |
| \_value | uint256 |             |

### transferFrom

```javascript
function transferFrom(address _from, address _to, uint256 _value) external nonpayable
returns(bool)
```

**Arguments**

| Name    | Type    | Description |
| ------- | ------- | ----------- |
| \_from  | address |             |
| \_to    | address |             |
| \_value | uint256 |             |

### approve

```javascript
function approve(address _spender, uint256 _value) external nonpayable
returns(bool)
```

**Arguments**

| Name      | Type    | Description |
| --------- | ------- | ----------- |
| \_spender | address |             |
| \_value   | uint256 |             |

### decreaseApproval

```javascript
function decreaseApproval(address _spender, uint256 _subtractedValue) external nonpayable
returns(bool)
```

**Arguments**

| Name              | Type    | Description |
| ----------------- | ------- | ----------- |
| \_spender         | address |             |
| \_subtractedValue | uint256 |             |

### increaseApproval

```javascript
function increaseApproval(address _spender, uint256 _addedValue) external nonpayable
returns(bool)
```

**Arguments**

| Name         | Type    | Description |
| ------------ | ------- | ----------- |
| \_spender    | address |             |
| \_addedValue | uint256 |             |


---

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