# IERC20Minimal

## IERC20Minimal

Contains a subset of the full ERC20 interface that is used in DragonswapV2

### Functions[​](https://docs.uniswap.org/contracts/v3/reference/core/interfaces/IERC20Minimal#functions) <a href="#functions" id="functions"></a>

#### balanceOf[​](https://docs.uniswap.org/contracts/v3/reference/core/interfaces/IERC20Minimal#balanceof) <a href="#balanceof" id="balanceof"></a>

```solidity
  function balanceOf(
    address account
  ) external view returns (uint256)
```

Returns the balance of a token

**Parameters:**[**​**](https://docs.uniswap.org/contracts/v3/reference/core/interfaces/IERC20Minimal#parameters)

| Name      | Type    | Description                                                                    |
| --------- | ------- | ------------------------------------------------------------------------------ |
| `account` | address | The account for which to look up the number of tokens it has, i.e. its balance |

**Return Values:**[**​**](https://docs.uniswap.org/contracts/v3/reference/core/interfaces/IERC20Minimal#return-values)

| Type    | Description                          |
| ------- | ------------------------------------ |
| uint256 | number of tokens held by the account |

#### transfer[​](https://docs.uniswap.org/contracts/v3/reference/core/interfaces/IERC20Minimal#transfer) <a href="#transfer" id="transfer"></a>

```solidity
  function transfer(
    address recipient,
    uint256 amount
  ) external returns (bool)
```

Transfers the amount of token from the `msg.sender` to the recipient

**Parameters:**[**​**](https://docs.uniswap.org/contracts/v3/reference/core/interfaces/IERC20Minimal#parameters-1)

| Name        | Type    | Description                                                   |
| ----------- | ------- | ------------------------------------------------------------- |
| `recipient` | address | The account that will receive the amount transferred          |
| `amount`    | uint256 | The number of tokens to send from the sender to the recipient |

**Return Values:**[**​**](https://docs.uniswap.org/contracts/v3/reference/core/interfaces/IERC20Minimal#return-values-1)

| Type | Description                                                        |
| ---- | ------------------------------------------------------------------ |
| bool | true for a successful transfer, false for an unsuccessful transfer |

#### allowance[​](https://docs.uniswap.org/contracts/v3/reference/core/interfaces/IERC20Minimal#allowance) <a href="#allowance" id="allowance"></a>

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

Returns the current allowance given to a spender by an owner

**Parameters:**[**​**](https://docs.uniswap.org/contracts/v3/reference/core/interfaces/IERC20Minimal#parameters-2)

| Name      | Type    | Description                      |
| --------- | ------- | -------------------------------- |
| `owner`   | address | The account of the token owner   |
| `spender` | address | The account of the token spender |

**Return Values:**[**​**](https://docs.uniswap.org/contracts/v3/reference/core/interfaces/IERC20Minimal#return-values-2)

| Type    | Description                                       |
| ------- | ------------------------------------------------- |
| uint256 | current allowance granted by `owner` to `spender` |

#### approve[​](https://docs.uniswap.org/contracts/v3/reference/core/interfaces/IERC20Minimal#approve) <a href="#approve" id="approve"></a>

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

Sets the allowance of a spender from the `msg.sender` to the value `amount`

**Parameters:**[**​**](https://docs.uniswap.org/contracts/v3/reference/core/interfaces/IERC20Minimal#parameters-3)

| Name      | Type    | Description                                                                    |
| --------- | ------- | ------------------------------------------------------------------------------ |
| `spender` | address | The account which will be allowed to spend a given amount of the owners tokens |
| `amount`  | uint256 | The amount of tokens allowed to be used by `spender`                           |

**Return Values:**[**​**](https://docs.uniswap.org/contracts/v3/reference/core/interfaces/IERC20Minimal#return-values-3)

| Type | Description                                            |
| ---- | ------------------------------------------------------ |
| bool | true for a successful approval, false for unsuccessful |

#### transferFrom[​](https://docs.uniswap.org/contracts/v3/reference/core/interfaces/IERC20Minimal#transferfrom) <a href="#transferfrom" id="transferfrom"></a>

```solidity
  function transferFrom(
    address sender,
    address recipient,
    uint256 amount
  ) external returns (bool)
```

Transfers `amount` tokens from `sender` to `recipient` up to the allowance given to the `msg.sender`

**Parameters:**[**​**](https://docs.uniswap.org/contracts/v3/reference/core/interfaces/IERC20Minimal#parameters-4)

| Name        | Type    | Description                                           |
| ----------- | ------- | ----------------------------------------------------- |
| `sender`    | address | The account from which the transfer will be initiated |
| `recipient` | address | The recipient of the transfer                         |
| `amount`    | uint256 | The amount of the transfer                            |

**Return Values:**[**​**](https://docs.uniswap.org/contracts/v3/reference/core/interfaces/IERC20Minimal#return-values-4)

| Type | Description                                            |
| ---- | ------------------------------------------------------ |
| bool | true for a successful transfer, false for unsuccessful |

### Events[​](https://docs.uniswap.org/contracts/v3/reference/core/interfaces/IERC20Minimal#events) <a href="#events" id="events"></a>

#### Transfer[​](https://docs.uniswap.org/contracts/v3/reference/core/interfaces/IERC20Minimal#transfer-1) <a href="#transfer-1" id="transfer-1"></a>

```solidity
  event Transfer(
    address from,
    address to,
    uint256 value
  )
```

Event emitted when tokens are transferred from one address to another, either via `#transfer` or `#transferFrom`.

**Parameters:**[**​**](https://docs.uniswap.org/contracts/v3/reference/core/interfaces/IERC20Minimal#parameters-5)

| Name    | Type    | Description                                                             |
| ------- | ------- | ----------------------------------------------------------------------- |
| `from`  | address | The account from which the tokens were sent, i.e. the balance decreased |
| `to`    | address | The account to which the tokens were sent, i.e. the balance increased   |
| `value` | uint256 | The amount of tokens that were transferred                              |

#### Approval[​](https://docs.uniswap.org/contracts/v3/reference/core/interfaces/IERC20Minimal#approval) <a href="#approval" id="approval"></a>

```solidity
  event Approval(
    address owner,
    address spender,
    uint256 value
  )
```

Event emitted when the approval amount for the spender of a given owner's tokens changes.

**Parameters:**[**​**](https://docs.uniswap.org/contracts/v3/reference/core/interfaces/IERC20Minimal#parameters-6)

| Name      | Type    | Description                                               |
| --------- | ------- | --------------------------------------------------------- |
| `owner`   | address | The account that approved spending of its tokens          |
| `spender` | address | The account for which the spending allowance was modified |
| `value`   | uint256 | The new allowance from the owner to the spender           |