> For the complete documentation index, see [llms.txt](https://developers.polymath.network/polymath/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developers.polymath.network/polymath/api/ierc20.md).

# ERC20 interface (IERC20.sol)

View Source: [openzeppelin-solidity/contracts/token/ERC20/IERC20.sol](https://github.com/PolymathNetwork/polymath-core/tree/096ba240a927c98e1f1a182d2efee7c4c4c1dfc5/openzeppelin-solidity/contracts/token/ERC20/IERC20.sol)

**↘ Derived Contracts:** [**ERC20**](https://github.com/PolymathNetwork/polymath-core/tree/096ba240a927c98e1f1a182d2efee7c4c4c1dfc5/docs/api/ERC20.md)

**IERC20**

see <https://eips.ethereum.org/EIPS/eip-20>

**Events**

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

## Functions

* [transfer(address to, uint256 value)](/polymath/api/ierc20.md#transfer)
* [approve(address spender, uint256 value)](/polymath/api/ierc20.md#approve)
* [transferFrom(address from, address to, uint256 value)](/polymath/api/ierc20.md#transferfrom)
* [totalSupply()](/polymath/api/ierc20.md#totalsupply)
* [balanceOf(address who)](/polymath/api/ierc20.md#balanceof)
* [allowance(address owner, address spender)](/polymath/api/ierc20.md#allowance)

### transfer

⤿ Overridden Implementation(s): [ERC20.transfer](https://github.com/PolymathNetwork/polymath-core/tree/096ba240a927c98e1f1a182d2efee7c4c4c1dfc5/docs/api/ERC20.md#transfer),[SecurityToken.transfer](https://github.com/PolymathNetwork/polymath-core/tree/096ba240a927c98e1f1a182d2efee7c4c4c1dfc5/docs/api/SecurityToken.md#transfer)

```javascript
function transfer(address to, uint256 value) external nonpayable
returns(bool)
```

**Arguments**

| Name  | Type    | Description |
| ----- | ------- | ----------- |
| to    | address |             |
| value | uint256 |             |

### approve

⤿ Overridden Implementation(s): [ERC20.approve](https://github.com/PolymathNetwork/polymath-core/tree/096ba240a927c98e1f1a182d2efee7c4c4c1dfc5/docs/api/ERC20.md#approve)

```javascript
function approve(address spender, uint256 value) external nonpayable
returns(bool)
```

**Arguments**

| Name    | Type    | Description |
| ------- | ------- | ----------- |
| spender | address |             |
| value   | uint256 |             |

### transferFrom

⤿ Overridden Implementation(s): [ERC20.transferFrom](https://github.com/PolymathNetwork/polymath-core/tree/096ba240a927c98e1f1a182d2efee7c4c4c1dfc5/docs/api/ERC20.md#transferfrom),[SecurityToken.transferFrom](https://github.com/PolymathNetwork/polymath-core/tree/096ba240a927c98e1f1a182d2efee7c4c4c1dfc5/docs/api/SecurityToken.md#transferfrom)

```javascript
function transferFrom(address from, address to, uint256 value) external nonpayable
returns(bool)
```

**Arguments**

| Name  | Type    | Description |
| ----- | ------- | ----------- |
| from  | address |             |
| to    | address |             |
| value | uint256 |             |

### totalSupply

⤿ Overridden Implementation(s): [ERC20.totalSupply](https://github.com/PolymathNetwork/polymath-core/tree/096ba240a927c98e1f1a182d2efee7c4c4c1dfc5/docs/api/ERC20.md#totalsupply)

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

**Arguments**

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

### balanceOf

⤿ Overridden Implementation(s): [ERC20.balanceOf](https://github.com/PolymathNetwork/polymath-core/tree/096ba240a927c98e1f1a182d2efee7c4c4c1dfc5/docs/api/ERC20.md#balanceof)

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

**Arguments**

| Name | Type    | Description |
| ---- | ------- | ----------- |
| who  | address |             |

### allowance

⤿ Overridden Implementation(s): [ERC20.allowance](https://github.com/PolymathNetwork/polymath-core/tree/096ba240a927c98e1f1a182d2efee7c4c4c1dfc5/docs/api/ERC20.md#allowance)

```javascript
function allowance(address owner, address spender) external view
returns(uint256)
```

**Arguments**

| Name    | Type    | Description |
| ------- | ------- | ----------- |
| owner   | address |             |
| spender | address |             |