> For the complete documentation index, see [llms.txt](https://docs.fringe.fi/v2-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/v2-smart-contract-documentation/interfaces/eip20nonstandardinterface.md).

# EIP20NonStandardInterface

## Overview

#### License: MIT

```solidity
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>

## Events info

### Transfer

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

### Approval

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

## Functions info

### totalSupply (0x18160ddd)

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

Get the total number of tokens in circulation

Return values:

| Name | Type    | Description          |
| ---- | ------- | -------------------- |
| \[0] | uint256 | The supply of tokens |

### balanceOf (0x70a08231)

```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 |

### transfer (0xa9059cbb)

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

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 (0x23b872dd)

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

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       |

### approve (0x095ea7b3)

```solidity
function approve(
    address spender,
    uint256 amount
) external 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 |         |                                                      |

### allowance (0xdd62ed3e)

```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 |         |                                                              |