Contract Source Code (Vyper language format)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta
• Remix IDE

More Options

• Similar
• Submit Audit
• Compare

# @version ^0.2.0
"""
@title Curve LP Token
@author Curve.Fi
@notice Base implementation for an LP token provided for
        supplying liquidity to `StableSwap`
@dev Follows the ERC-20 token standard as defined at
     https://eips.ethereum.org/EIPS/eip-20
"""

from vyper.interfaces import ERC20

implements: ERC20

interface Curve:
    def owner() -> address: view


event Transfer:
    _from: indexed(address)
    _to: indexed(address)
    _value: uint256

event Approval:
    _owner: indexed(address)
    _spender: indexed(address)
    _value: uint256


name: public(String[64])
symbol: public(String[32])
decimals: public(uint256)

# NOTE: By declaring `balanceOf` as public, vyper automatically generates a 'balanceOf()' getter
#       method to allow access to account balances.
#       The _KeyType will become a required parameter for the getter and it will return _ValueType.
#       See: https://vyper.readthedocs.io/en/v0.1.0-beta.8/types.html?highlight=getter#mappings
balanceOf: public(HashMap[address, uint256])
allowances: HashMap[address, HashMap[address, uint256]]
total_supply: uint256
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)


@external
def set_minter(_minter: address):
    assert msg.sender == self.minter
    self.minter = _minter


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


@view
@external
def totalSupply() -> uint256:
    """
    @dev Total number of tokens in existence.
    """
    return self.total_supply


@view
@external
def allowance(_owner : address, _spender : address) -> uint256:
    """
    @dev Function to check the amount of tokens that an owner allowed to a spender.
    @param _owner The address which owns the funds.
    @param _spender The address which will spend the funds.
    @return An uint256 specifying the amount of tokens still available for the spender.
    """
    return self.allowances[_owner][_spender]


@external
def transfer(_to : address, _value : uint256) -> bool:
    """
    @dev Transfer token for a specified address
    @param _to The address to transfer to.
    @param _value The amount to be transferred.
    """
    # NOTE: vyper does not allow underflows
    #       so the following subtraction would revert on insufficient balance
    self.balanceOf[msg.sender] -= _value
    self.balanceOf[_to] += _value
    log Transfer(msg.sender, _to, _value)
    return True


@external
def transferFrom(_from : address, _to : address, _value : uint256) -> bool:
    """
     @dev Transfer tokens from one address to another.
     @param _from address The address which you want to send tokens from
     @param _to address The address which you want to transfer to
     @param _value uint256 the amount of tokens to be transferred
    """
    # NOTE: vyper does not allow underflows
    #       so the following subtraction would revert on insufficient balance
    self.balanceOf[_from] -= _value
    self.balanceOf[_to] += _value
    if msg.sender != self.minter:  # minter is allowed to transfer anything
        _allowance: uint256 = self.allowances[_from][msg.sender]
        if _allowance != MAX_UINT256:
            # NOTE: vyper does not allow underflows
            # so the following subtraction would revert on insufficient allowance
            self.allowances[_from][msg.sender] = _allowance - _value
    log Transfer(_from, _to, _value)
    return True


@external
def approve(_spender : address, _value : uint256) -> bool:
    """
    @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
         Beware that changing an allowance with this method brings the risk that someone may use both the old
         and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
         race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
         https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
    @param _spender The address which will spend the funds.
    @param _value The amount of tokens to be spent.
    """
    assert _value == 0 or self.allowances[msg.sender][_spender] == 0
    self.allowances[msg.sender][_spender] = _value
    log Approval(msg.sender, _spender, _value)
    return True


@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


@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

• No Contract Security Audit Submitted- Submit Audit Here

[{"name":"Transfer","inputs":[{"type":"address","name":"_from","indexed":true},{"type":"address","name":"_to","indexed":true},{"type":"uint256","name":"_value","indexed":false}],"anonymous":false,"type":"event"},{"name":"Approval","inputs":[{"type":"address","name":"_owner","indexed":true},{"type":"address","name":"_spender","indexed":true},{"type":"uint256","name":"_value","indexed":false}],"anonymous":false,"type":"event"},{"outputs":[],"inputs":[{"type":"string","name":"_name"},{"type":"string","name":"_symbol"},{"type":"uint256","name":"_decimals"},{"type":"uint256","name":"_supply"}],"stateMutability":"nonpayable","type":"constructor"},{"name":"set_minter","outputs":[],"inputs":[{"type":"address","name":"_minter"}],"stateMutability":"nonpayable","type":"function","gas":36218},{"name":"set_name","outputs":[],"inputs":[{"type":"string","name":"_name"},{"type":"string","name":"_symbol"}],"stateMutability":"nonpayable","type":"function","gas":177979},{"name":"totalSupply","outputs":[{"type":"uint256","name":""}],"inputs":[],"stateMutability":"view","type":"function","gas":1121},{"name":"allowance","outputs":[{"type":"uint256","name":""}],"inputs":[{"type":"address","name":"_owner"},{"type":"address","name":"_spender"}],"stateMutability":"view","type":"function","gas":1581},{"name":"transfer","outputs":[{"type":"bool","name":""}],"inputs":[{"type":"address","name":"_to"},{"type":"uint256","name":"_value"}],"stateMutability":"nonpayable","type":"function","gas":74803},{"name":"transferFrom","outputs":[{"type":"bool","name":""}],"inputs":[{"type":"address","name":"_from"},{"type":"address","name":"_to"},{"type":"uint256","name":"_value"}],"stateMutability":"nonpayable","type":"function","gas":112299},{"name":"approve","outputs":[{"type":"bool","name":""}],"inputs":[{"type":"address","name":"_spender"},{"type":"uint256","name":"_value"}],"stateMutability":"nonpayable","type":"function","gas":39049},{"name":"mint","outputs":[{"type":"bool","name":""}],"inputs":[{"type":"address","name":"_to"},{"type":"uint256","name":"_value"}],"stateMutability":"nonpayable","type":"function","gas":75779},{"name":"burnFrom","outputs":[{"type":"bool","name":""}],"inputs":[{"type":"address","name":"_to"},{"type":"uint256","name":"_value"}],"stateMutability":"nonpayable","type":"function","gas":75797},{"name":"name","outputs":[{"type":"string","name":""}],"inputs":[],"stateMutability":"view","type":"function","gas":7733},{"name":"symbol","outputs":[{"type":"string","name":""}],"inputs":[],"stateMutability":"view","type":"function","gas":6786},{"name":"decimals","outputs":[{"type":"uint256","name":""}],"inputs":[],"stateMutability":"view","type":"function","gas":1391},{"name":"balanceOf","outputs":[{"type":"uint256","name":""}],"inputs":[{"type":"address","name":"arg0"}],"stateMutability":"view","type":"function","gas":1636},{"name":"minter","outputs":[{"type":"address","name":""}],"inputs":[],"stateMutability":"view","type":"function","gas":1451}]

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

000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000c000000000000000000000000000000000000000000000000000000000000000120000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001543757276652e666920744254432f736274634372760000000000000000000000000000000000000000000000000000000000000000000000000000000000000c746274632f736274634372760000000000000000000000000000000000000000

-----Decoded View---------------
Arg [0] : _name (string): Curve.fi tBTC/sbtcCrv
Arg [1] : _symbol (string): tbtc/sbtcCrv
Arg [2] : _decimals (uint256): 18
Arg [3] : _supply (uint256): 0

-----Encoded View---------------
8 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000080
Arg [1] : 00000000000000000000000000000000000000000000000000000000000000c0
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000012
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000015
Arg [5] : 43757276652e666920744254432f736274634372760000000000000000000000
Arg [6] : 000000000000000000000000000000000000000000000000000000000000000c
Arg [7] : 746274632f736274634372760000000000000000000000000000000000000000