# curve-token-v2

Source: [https://docs.curve.finance/developer/amm/legacy/stableswap/lp-tokens/curve-token-v2](https://docs.curve.finance/developer/amm/legacy/stableswap/lp-tokens/curve-token-v2)

The implementation for a Curve Token V2 may be viewed on [GitHub](https://github.com/curvefi/curve-contract/blob/master/contracts/tokens/CurveTokenV2.vy).

note

Compared to Curve Token v1, the following changes have been made to the API:

-   `minter` attribute is public and therefore a `minter` getter has been generated
-   `name` and `symbol` attributes can be set via `set_name`
-   `mint` method returns `bool`
-   `burnFrom` method returns `bool`
-   `burn` method has been removed

warning

For Curve LP Tokens V1 and V2, non-zero to non-zero approvals are prohibited. Instead, after every non-zero approval, the allowance for the spender must be reset to `0`.

<a id="curvetokenminter"></a>

### `CurveToken.minter`

`CurveToken.minter() → address: view`

Getter for the address of the `minter` of the token.

**<>Source code▼**

```vyper
minter: public(address)

@external
def __init__(_name: String[64], _symbol: String[32], _decimals: uint256, _supply: uint256):
    init_supply: uint256 = _supply * 10 **_decimals
    self.name = _name
    self.symbol = _symbol
    self.decimals = _decimals
    self.balanceOf[msg.sender] = init_supply
    self.total_supply = init_supply
    self.minter = msg.sender
    log Transfer(ZERO_ADDRESS, msg.sender, init_supply)
```

**▶Example▼**

```shell
>>> lp_token.minter()
""
```

<a id="curvetokenset_name"></a>

### `CurveToken.set_name`

`CurveToken.set_name(_name: String[64], _symbol: String[32])`

Set the name and symbol of the token. This method can only be called by minter.

| Input | Type | Description |
| --- | --- | --- |
| `name` | `String[64]` | New name of token |
| `symbol` | `String[32]` | New symbol of token |

**<>Source code▼**

```vyper
@external
def set_name(_name: String[64], _symbol: String[32]):
    assert Curve(self.minter).owner() == msg.sender
    self.name = _name
    self.symbol = _symbol
```

**▶Example▼**

```shell
>>> lp_token.minter()
todo: ""
```

<a id="curvetokenmint"></a>

### `CurveToken.mint`

`CurveToken.mint(_to: address, _value: uint256) → bool`

Mint an amount of the token and assign it to an account. This encapsulates the modification of balances such that the proper events are emitted. Returns `True` if not reverted.

| Input | Type | Description |
| --- | --- | --- |
| `_to` | `address` | Receiver of minted tokens |
| `_value` | `uint256` | Amount of tokens minted |

Emits: Transfer

**<>Source code▼**

```vyper
@external
def mint(_to: address, _value: uint256) -> bool:
    """
    @dev Mint an amount of the token and assigns it to an account.
         This encapsulates the modification of balances such that the
         proper events are emitted.
    @param _to The account that will receive the created tokens.
    @param _value The amount that will be created.
    """
    assert msg.sender == self.minter
    assert _to != ZERO_ADDRESS
    self.total_supply += _value
    self.balanceOf[_to] += _value
    log Transfer(ZERO_ADDRESS, _to, _value)
    return True
```

**▶Example▼**

```shell
>>> lp_token.mint()
todo: ""
```

<a id="curvetokenburnfrom"></a>

### `CurveToken.burnFrom`

`CurveToken.burnFrom(_to: address, _value: uint256) → bool`

Burn an amount of the token from a given account. Returns `True` if not reverted.

| Input | Type | Description |
| --- | --- | --- |
| `_to` | `address` | Account whose tokens will be burned |
| `_value` | `uint256` | Amount that will be burned |

Emits: Transfer

**<>Source code▼**

```vyper
@external
def burnFrom(_to: address, _value: uint256) -> bool:
    """
    @dev Burn an amount of the token from a given account.
    @param _to The account whose tokens will be burned.
    @param _value The amount that will be burned.
    """
    assert msg.sender == self.minter
    assert _to != ZERO_ADDRESS

    self.total_supply -= _value
    self.balanceOf[_to] -= _value
    log Transfer(_to, ZERO_ADDRESS, _value)

    return True
```

**▶Example▼**

```shell
>>> lp_token.burnFrom()
todo: ""
```