> For the complete documentation index, see [llms.txt](https://docs.fringe.fi/smart-contract-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.fringe.fi/smart-contract-documentation/interfaces/eip20nonstandardinterface.md).

# EIP 20 Non Standard Interface

> EIP20NonStandardInterface

*Version of ERC20 with no return values for `transfer` and `transferFrom` See <https://medium.com/coinmonks/missing-return-value-bug-at-least-130-tokens-affected-d67bf08521ca>*

## Methods

### allowance

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

Get the current allowance from `owner` for `spender`

#### Parameters

| Name    | Type    | Description                                                                                          |
| ------- | ------- | ---------------------------------------------------------------------------------------------------- |
| owner   | address | The address of the account which owns the tokens to be spent                                         |
| spender | address | The address of the account which may transfer tokens return The number of tokens allowed to be spent |

#### Returns

| Name      | Type    | Description |
| --------- | ------- | ----------- |
| remaining | uint256 | undefined   |

### approve

```solidity
function approve(address spender, uint256 amount) external nonpayable returns (bool success)
```

Approve `spender` to transfer up to `amount` from `src`

*This will overwrite the approval amount for `spender` and is subject to issues noted* [*here*](https://eips.ethereum.org/EIPS/eip-20#approve)

#### Parameters

| Name    | Type    | Description                                                                         |
| ------- | ------- | ----------------------------------------------------------------------------------- |
| spender | address | The address of the account which may transfer tokens                                |
| amount  | uint256 | The number of tokens that are approved return Whether or not the approval succeeded |

#### Returns

| Name    | Type | Description |
| ------- | ---- | ----------- |
| success | bool | undefined   |

### balanceOf

```solidity
function balanceOf(address owner) external view returns (uint256 balance)
```

Gets the balance of the specified address

#### Parameters

| Name  | Type    | Description                                          |
| ----- | ------- | ---------------------------------------------------- |
| owner | address | The address from which the balance will be retrieved |

#### Returns

| Name    | Type    | Description |
| ------- | ------- | ----------- |
| balance | uint256 | undefined   |

### totalSupply

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

Get the total number of tokens in circulation

#### Returns

| Name | Type    | Description          |
| ---- | ------- | -------------------- |
| \_0  | uint256 | The supply of tokens |

### transfer

```solidity
function transfer(address dst, uint256 amount) external nonpayable
```

Transfer `amount` tokens from `msg.sender` to `dst`

#### Parameters

| Name   | Type    | Description                            |
| ------ | ------- | -------------------------------------- |
| dst    | address | The address of the destination account |
| amount | uint256 | The number of tokens to transfer       |

### transferFrom

```solidity
function transferFrom(address src, address dst, uint256 amount) external nonpayable
```

Transfer `amount` tokens from `src` to `dst`

#### Parameters

| Name   | Type    | Description                            |
| ------ | ------- | -------------------------------------- |
| src    | address | The address of the source account      |
| dst    | address | The address of the destination account |
| amount | uint256 | The number of tokens to transfer       |

## Events

### Approval

```solidity
event Approval(address indexed owner, address indexed spender, uint256 amount)
```

#### Parameters

| Name              | Type    | Description |
| ----------------- | ------- | ----------- |
| owner `indexed`   | address | undefined   |
| spender `indexed` | address | undefined   |
| amount            | uint256 | undefined   |

### Transfer

```solidity
event Transfer(address indexed from, address indexed to, uint256 amount)
```

#### Parameters

| Name           | Type    | Description |
| -------------- | ------- | ----------- |
| from `indexed` | address | undefined   |
| to `indexed`   | address | undefined   |
| amount         | uint256 | undefined   |