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Latest 25 from a total of 246 transactions
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Swap | 18906996 | 366 days ago | IN | 0 ETH | 0.00278218 | ||||
Swap | 18748495 | 388 days ago | IN | 0 ETH | 0.00564764 | ||||
Swap | 18748489 | 388 days ago | IN | 0 ETH | 0.00520602 | ||||
Swap | 18468687 | 427 days ago | IN | 0 ETH | 0.00256533 | ||||
Swap | 18468675 | 427 days ago | IN | 0 ETH | 0.0028599 | ||||
Swap | 18378811 | 440 days ago | IN | 0 ETH | 0.0024716 | ||||
Swap | 18273778 | 455 days ago | IN | 0 ETH | 0.00119491 | ||||
Swap | 17995236 | 494 days ago | IN | 0 ETH | 0.00268779 | ||||
Swap | 17690288 | 536 days ago | IN | 0 ETH | 0.00371118 | ||||
Swap | 17690283 | 536 days ago | IN | 0 ETH | 0.00366446 | ||||
Swap | 17016334 | 631 days ago | IN | 0 ETH | 0.00340155 | ||||
Swap | 17016305 | 631 days ago | IN | 0 ETH | 0.00337545 | ||||
Swap | 16562525 | 695 days ago | IN | 0 ETH | 0.00188321 | ||||
Swap | 15995375 | 774 days ago | IN | 0 ETH | 0.00238494 | ||||
Swap | 15660768 | 821 days ago | IN | 0 ETH | 0.00065674 | ||||
Swap | 15609010 | 828 days ago | IN | 0 ETH | 0.00062305 | ||||
Swap | 15222533 | 889 days ago | IN | 0 ETH | 0.00170405 | ||||
Swap | 15144264 | 901 days ago | IN | 0 ETH | 0.00667954 | ||||
Swap | 15144233 | 901 days ago | IN | 0 ETH | 0.00505092 | ||||
Swap | 14676654 | 978 days ago | IN | 0 ETH | 0.00759958 | ||||
Swap | 14676627 | 978 days ago | IN | 0 ETH | 0.008821 | ||||
Swap | 14676596 | 978 days ago | IN | 0 ETH | 0.00921382 | ||||
Swap | 14676573 | 978 days ago | IN | 0 ETH | 0.01037001 | ||||
Swap | 14456761 | 1012 days ago | IN | 0 ETH | 0.00965705 | ||||
Swap | 14456756 | 1012 days ago | IN | 0 ETH | 0.01190162 |
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Similar Match Source Code This contract matches the deployed Bytecode of the Source Code for Contract 0x2171cb13...87bC838Bd The constructor portion of the code might be different and could alter the actual behaviour of the contract
Contract Name:
Swapper
Compiler Version
v0.5.16+commit.9c3226ce
Contract Source Code (Solidity)
/** *Submitted for verification at Etherscan.io on 2020-08-11 */ // File: contracts/openzeppelin-solidity/token/ERC20/IERC20.sol pragma solidity ^0.5.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. Does not include * the optional functions; to access them see `ERC20Detailed`. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a `Transfer` event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through `transferFrom`. This is * zero by default. * * This value changes when `approve` or `transferFrom` are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * > 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 * * Emits an `Approval` event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a `Transfer` event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to `approve`. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); } // File: contracts/openzeppelin-solidity/math/SafeMath.sol pragma solidity ^0.5.0; /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { require(b <= a, "SafeMath: subtraction overflow"); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, "SafeMath: division by zero"); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { require(b != 0, "SafeMath: modulo by zero"); return a % b; } } // File: contracts/openzeppelin-solidity/token/ERC20/ERC20.sol pragma solidity ^0.5.0; /** * @dev Implementation of the `IERC20` interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using `_mint`. * For a generic mechanism see `ERC20Mintable`. * * *For a detailed writeup see our guide [How to implement supply * mechanisms](https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226).* * * We have followed general OpenZeppelin guidelines: functions revert instead * of returning `false` on failure. This behavior is nonetheless conventional * and does not conflict with the expectations of ERC20 applications. * * Additionally, an `Approval` event is emitted on calls to `transferFrom`. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard `decreaseAllowance` and `increaseAllowance` * functions have been added to mitigate the well-known issues around setting * allowances. See `IERC20.approve`. */ contract ERC20 is IERC20 { using SafeMath for uint256; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; /** * @dev See `IERC20.totalSupply`. */ function totalSupply() public view returns (uint256) { return _totalSupply; } /** * @dev See `IERC20.balanceOf`. */ function balanceOf(address account) public view returns (uint256) { return _balances[account]; } /** * @dev See `IERC20.transfer`. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public returns (bool) { _transfer(msg.sender, recipient, amount); return true; } /** * @dev See `IERC20.allowance`. */ function allowance(address owner, address spender) public view returns (uint256) { return _allowances[owner][spender]; } /** * @dev See `IERC20.approve`. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 value) public returns (bool) { _approve(msg.sender, spender, value); return true; } /** * @dev See `IERC20.transferFrom`. * * Emits an `Approval` event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of `ERC20`; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `value`. * - the caller must have allowance for `sender`'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) public returns (bool) { _transfer(sender, recipient, amount); _approve(sender, msg.sender, _allowances[sender][msg.sender].sub(amount)); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to `approve` that can be used as a mitigation for * problems described in `IERC20.approve`. * * Emits an `Approval` event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public returns (bool) { _approve(msg.sender, spender, _allowances[msg.sender][spender].add(addedValue)); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to `approve` that can be used as a mitigation for * problems described in `IERC20.approve`. * * Emits an `Approval` event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) { _approve(msg.sender, spender, _allowances[msg.sender][spender].sub(subtractedValue)); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to `transfer`, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a `Transfer` event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _balances[sender] = _balances[sender].sub(amount); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a `Transfer` event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal { require(account != address(0), "ERC20: mint to the zero address"); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } /** * @dev Destoys `amount` tokens from `account`, reducing the * total supply. * * Emits a `Transfer` event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 value) internal { require(account != address(0), "ERC20: burn from the zero address"); _totalSupply = _totalSupply.sub(value); _balances[account] = _balances[account].sub(value); emit Transfer(account, address(0), value); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens. * * This is internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an `Approval` event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 value) internal { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = value; emit Approval(owner, spender, value); } /** * @dev Destoys `amount` tokens from `account`.`amount` is then deducted * from the caller's allowance. * * See `_burn` and `_approve`. */ function _burnFrom(address account, uint256 amount) internal { _burn(account, amount); _approve(account, msg.sender, _allowances[account][msg.sender].sub(amount)); } } // File: contracts/openzeppelin-solidity/access/Roles.sol pragma solidity ^0.5.0; /** * @title Roles * @dev Library for managing addresses assigned to a Role. */ library Roles { struct Role { mapping (address => bool) bearer; } /** * @dev Give an account access to this role. */ function add(Role storage role, address account) internal { require(!has(role, account), "Roles: account already has role"); role.bearer[account] = true; } /** * @dev Remove an account's access to this role. */ function remove(Role storage role, address account) internal { require(has(role, account), "Roles: account does not have role"); role.bearer[account] = false; } /** * @dev Check if an account has this role. * @return bool */ function has(Role storage role, address account) internal view returns (bool) { require(account != address(0), "Roles: account is the zero address"); return role.bearer[account]; } } // File: contracts/openzeppelin-solidity/access/roles/MinterRole.sol pragma solidity ^0.5.0; contract MinterRole { using Roles for Roles.Role; event MinterAdded(address indexed account); event MinterRemoved(address indexed account); Roles.Role private _minters; constructor () internal { _addMinter(msg.sender); } modifier onlyMinter() { require(isMinter(msg.sender), "MinterRole: caller does not have the Minter role"); _; } function isMinter(address account) public view returns (bool) { return _minters.has(account); } function addMinter(address account) public onlyMinter { _addMinter(account); } function renounceMinter() public { _removeMinter(msg.sender); } function _addMinter(address account) internal { _minters.add(account); emit MinterAdded(account); } function _removeMinter(address account) internal { _minters.remove(account); emit MinterRemoved(account); } } // File: contracts/openzeppelin-solidity/token/ERC20/ERC20Mintable.sol pragma solidity ^0.5.0; /** * @dev Extension of `ERC20` that adds a set of accounts with the `MinterRole`, * which have permission to mint (create) new tokens as they see fit. * * At construction, the deployer of the contract is the only minter. */ contract ERC20Mintable is ERC20, MinterRole { /** * @dev See `ERC20._mint`. * * Requirements: * * - the caller must have the `MinterRole`. */ function mint(address account, uint256 amount) public onlyMinter returns (bool) { _mint(account, amount); return true; } } // File: contracts/openzeppelin-solidity/ownership/Secondary.sol pragma solidity ^0.5.0; /** * @dev A Secondary contract can only be used by its primary account (the one that created it). */ contract Secondary { address private _primary; /** * @dev Emitted when the primary contract changes. */ event PrimaryTransferred( address recipient ); /** * @dev Sets the primary account to the one that is creating the Secondary contract. */ constructor () internal { _primary = msg.sender; emit PrimaryTransferred(_primary); } /** * @dev Reverts if called from any account other than the primary. */ modifier onlyPrimary() { require(msg.sender == _primary, "Secondary: caller is not the primary account"); _; } /** * @return the address of the primary. */ function primary() public view returns (address) { return _primary; } /** * @dev Transfers contract to a new primary. * @param recipient The address of new primary. */ function transferPrimary(address recipient) public onlyPrimary { require(recipient != address(0), "Secondary: new primary is the zero address"); _primary = recipient; emit PrimaryTransferred(_primary); } } // File: contracts/minime/Controlled.sol pragma solidity ^0.5.0; contract Controlled { /// @notice The address of the controller is the only address that can call /// a function with this modifier modifier onlyController { require(msg.sender == controller, "Controlled: caller is not the controller"); _; } address payable public controller; constructor () public { controller = msg.sender;} /// @notice Changes the controller of the contract /// @param _newController The new controller of the contract function changeController(address payable _newController) public onlyController { controller = _newController; } } // File: contracts/minime/TokenController.sol pragma solidity ^0.5.0; /// @dev The token controller contract must implement these functions contract TokenController { /// @notice Called when `_owner` sends ether to the MiniMe Token contract /// @param _owner The address that sent the ether to create tokens /// @return True if the ether is accepted, false if it throws function proxyPayment(address _owner) public payable returns(bool); /// @notice Notifies the controller about a token transfer allowing the /// controller to react if desired /// @param _from The origin of the transfer /// @param _to The destination of the transfer /// @param _amount The amount of the transfer /// @return False if the controller does not authorize the transfer function onTransfer(address _from, address _to, uint _amount) public returns(bool); /// @notice Notifies the controller about an approval allowing the /// controller to react if desired /// @param _owner The address that calls `approve()` /// @param _spender The spender in the `approve()` call /// @param _amount The amount in the `approve()` call /// @return False if the controller does not authorize the approval function onApprove(address _owner, address _spender, uint _amount) public returns(bool); } // File: contracts/minime/MiniMeToken.sol pragma solidity ^0.5.0; /* Copyright 2016, Jordi Baylina This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ /// @title MiniMeToken Contract /// @author Jordi Baylina /// @dev This token contract's goal is to make it easy for anyone to clone this /// token using the token distribution at a given block, this will allow DAO's /// and DApps to upgrade their features in a decentralized manner without /// affecting the original token /// @dev It is ERC20 compliant, but still needs to under go further testing. contract ApproveAndCallFallBack { function receiveApproval(address from, uint256 _amount, address _token, bytes memory _data) public; } /// @dev The actual token contract, the default controller is the msg.sender /// that deploys the contract, so usually this token will be deployed by a /// token controller contract, which Giveth will call a "Campaign" contract MiniMeToken is Controlled { string public name; //The Token's name: e.g. DigixDAO Tokens uint8 public decimals; //Number of decimals of the smallest unit string public symbol; //An identifier: e.g. REP string public version = 'MMT_0.2'; //An arbitrary versioning scheme /// @dev `Checkpoint` is the structure that attaches a block number to a /// given value, the block number attached is the one that last changed the /// value struct Checkpoint { // `fromBlock` is the block number that the value was generated from uint128 fromBlock; // `value` is the amount of tokens at a specific block number uint128 value; } // `parentToken` is the Token address that was cloned to produce this token; // it will be 0x0 for a token that was not cloned MiniMeToken public parentToken; // `parentSnapShotBlock` is the block number from the Parent Token that was // used to determine the initial distribution of the Clone Token uint public parentSnapShotBlock; // `creationBlock` is the block number that the Clone Token was created uint public creationBlock; // `balances` is the map that tracks the balance of each address, in this // contract when the balance changes the block number that the change // occurred is also included in the map mapping (address => Checkpoint[]) balances; // `allowed` tracks any extra transfer rights as in all ERC20 tokens mapping (address => mapping (address => uint256)) allowed; // Tracks the history of the `totalSupply` of the token Checkpoint[] totalSupplyHistory; // Flag that determines if the token is transferable or not. bool public transfersEnabled; // The factory used to create new clone tokens MiniMeTokenFactory public tokenFactory; //////////////// // Constructor //////////////// /// @notice Constructor to create a MiniMeToken /// @param _tokenFactory The address of the MiniMeTokenFactory contract that /// will create the Clone token contracts, the token factory needs to be /// deployed first /// @param _parentToken Address of the parent token, set to 0x0 if it is a /// new token /// @param _parentSnapShotBlock Block of the parent token that will /// determine the initial distribution of the clone token, set to 0 if it /// is a new token /// @param _tokenName Name of the new token /// @param _decimalUnits Number of decimals of the new token /// @param _tokenSymbol Token Symbol for the new token /// @param _transfersEnabled If true, tokens will be able to be transferred constructor ( address _tokenFactory, address payable _parentToken, uint _parentSnapShotBlock, string memory _tokenName, uint8 _decimalUnits, string memory _tokenSymbol, bool _transfersEnabled ) public { tokenFactory = MiniMeTokenFactory(_tokenFactory); name = _tokenName; // Set the name decimals = _decimalUnits; // Set the decimals symbol = _tokenSymbol; // Set the symbol parentToken = MiniMeToken(_parentToken); parentSnapShotBlock = _parentSnapShotBlock; transfersEnabled = _transfersEnabled; creationBlock = block.number; } /////////////////// // ERC20 Methods /////////////////// /// @notice Send `_amount` tokens to `_to` from `msg.sender` /// @param _to The address of the recipient /// @param _amount The amount of tokens to be transferred /// @return Whether the transfer was successful or not function transfer(address _to, uint256 _amount) public returns (bool success) { require(transfersEnabled, "MiniMeToken: transfer is not enable"); doTransfer(msg.sender, _to, _amount); return true; } /// @notice Send `_amount` tokens to `_to` from `_from` on the condition it /// is approved by `_from` /// @param _from The address holding the tokens being transferred /// @param _to The address of the recipient /// @param _amount The amount of tokens to be transferred /// @return True if the transfer was successful function transferFrom(address _from, address _to, uint256 _amount ) public returns (bool success) { // The controller of this contract can move tokens around at will, // this is important to recognize! Confirm that you trust the // controller of this contract, which in most situations should be // another open source smart contract or 0x0 if (msg.sender != controller) { require(transfersEnabled, "MiniMeToken: transfer is not enable"); // The standard ERC 20 transferFrom functionality require(allowed[_from][msg.sender] >= _amount); allowed[_from][msg.sender] -= _amount; } doTransfer(_from, _to, _amount); return true; } /// @dev This is the actual transfer function in the token contract, it can /// only be called by other functions in this contract. /// @param _from The address holding the tokens being transferred /// @param _to The address of the recipient /// @param _amount The amount of tokens to be transferred /// @return True if the transfer was successful function doTransfer(address _from, address _to, uint _amount ) internal { if (_amount == 0) { emit Transfer(_from, _to, _amount); // Follow the spec to louch the event when transfer 0 return; } require(parentSnapShotBlock < block.number); // Do not allow transfer to 0x0 or the token contract itself require((_to != address(0)) && (_to != address(this))); // If the amount being transfered is more than the balance of the // account the transfer throws uint previousBalanceFrom = balanceOfAt(_from, block.number); require(previousBalanceFrom >= _amount); // Alerts the token controller of the transfer if (isContract(controller)) { require(TokenController(controller).onTransfer(_from, _to, _amount)); } // First update the balance array with the new value for the address // sending the tokens updateValueAtNow(balances[_from], previousBalanceFrom - _amount); // Then update the balance array with the new value for the address // receiving the tokens uint previousBalanceTo = balanceOfAt(_to, block.number); require(previousBalanceTo + _amount >= previousBalanceTo); // Check for overflow updateValueAtNow(balances[_to], previousBalanceTo + _amount); // An event to make the transfer easy to find on the blockchain emit Transfer(_from, _to, _amount); } /// @param _owner The address that's balance is being requested /// @return The balance of `_owner` at the current block function balanceOf(address _owner) public view returns (uint256 balance) { return balanceOfAt(_owner, block.number); } /// @notice `msg.sender` approves `_spender` to spend `_amount` tokens on /// its behalf. This is a modified version of the ERC20 approve function /// to be a little bit safer /// @param _spender The address of the account able to transfer the tokens /// @param _amount The amount of tokens to be approved for transfer /// @return True if the approval was successful function approve(address _spender, uint256 _amount) public returns (bool success) { require(transfersEnabled, "MiniMeToken: transfer is not enable"); // To change the approve amount you first have to reduce the addresses` // allowance to zero by calling `approve(_spender,0)` if it is not // already 0 to mitigate the race condition described here: // https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 require((_amount == 0) || (allowed[msg.sender][_spender] == 0)); // Alerts the token controller of the approve function call if (isContract(controller)) { require(TokenController(controller).onApprove(msg.sender, _spender, _amount)); } allowed[msg.sender][_spender] = _amount; emit Approval(msg.sender, _spender, _amount); return true; } /// @dev This function makes it easy to read the `allowed[]` map /// @param _owner The address of the account that owns the token /// @param _spender The address of the account able to transfer the tokens /// @return Amount of remaining tokens of _owner that _spender is allowed /// to spend function allowance(address _owner, address _spender ) public view returns (uint256 remaining) { return allowed[_owner][_spender]; } /// @notice `msg.sender` approves `_spender` to send `_amount` tokens on /// its behalf, and then a function is triggered in the contract that is /// being approved, `_spender`. This allows users to use their tokens to /// interact with contracts in one function call instead of two /// @param _spender The address of the contract able to transfer the tokens /// @param _amount The amount of tokens to be approved for transfer /// @return True if the function call was successful function approveAndCall(address _spender, uint256 _amount, bytes memory _extraData ) public returns (bool success) { require(approve(_spender, _amount)); ApproveAndCallFallBack(_spender).receiveApproval( msg.sender, _amount, address(this), _extraData ); return true; } /// @dev This function makes it easy to get the total number of tokens /// @return The total number of tokens function totalSupply() public view returns (uint) { return totalSupplyAt(block.number); } //////////////// // Query balance and totalSupply in History //////////////// /// @dev Queries the balance of `_owner` at a specific `_blockNumber` /// @param _owner The address from which the balance will be retrieved /// @param _blockNumber The block number when the balance is queried /// @return The balance at `_blockNumber` function balanceOfAt(address _owner, uint _blockNumber) public view returns (uint) { // These next few lines are used when the balance of the token is // requested before a check point was ever created for this token, it // requires that the `parentToken.balanceOfAt` be queried at the // genesis block for that token as this contains initial balance of // this token if ((balances[_owner].length == 0) || (balances[_owner][0].fromBlock > _blockNumber)) { if (address(parentToken) != address(0)) { return parentToken.balanceOfAt(_owner, min(_blockNumber, parentSnapShotBlock)); } else { // Has no parent return 0; } // This will return the expected balance during normal situations } else { return getValueAt(balances[_owner], _blockNumber); } } /// @notice Total amount of tokens at a specific `_blockNumber`. /// @param _blockNumber The block number when the totalSupply is queried /// @return The total amount of tokens at `_blockNumber` function totalSupplyAt(uint _blockNumber) public view returns(uint) { // These next few lines are used when the totalSupply of the token is // requested before a check point was ever created for this token, it // requires that the `parentToken.totalSupplyAt` be queried at the // genesis block for this token as that contains totalSupply of this // token at this block number. if ((totalSupplyHistory.length == 0) || (totalSupplyHistory[0].fromBlock > _blockNumber)) { if (address(parentToken) != address(0)) { return parentToken.totalSupplyAt(min(_blockNumber, parentSnapShotBlock)); } else { return 0; } // This will return the expected totalSupply during normal situations } else { return getValueAt(totalSupplyHistory, _blockNumber); } } //////////////// // Clone Token Method //////////////// /// @notice Creates a new clone token with the initial distribution being /// this token at `_snapshotBlock` /// @param _cloneTokenName Name of the clone token /// @param _cloneDecimalUnits Number of decimals of the smallest unit /// @param _cloneTokenSymbol Symbol of the clone token /// @param _snapshotBlock Block when the distribution of the parent token is /// copied to set the initial distribution of the new clone token; /// if the block is zero than the actual block, the current block is used /// @param _transfersEnabled True if transfers are allowed in the clone /// @return The address of the new MiniMeToken Contract function createCloneToken( string memory _cloneTokenName, uint8 _cloneDecimalUnits, string memory _cloneTokenSymbol, uint _snapshotBlock, bool _transfersEnabled ) public returns(address) { if (_snapshotBlock == 0) _snapshotBlock = block.number; MiniMeToken cloneToken = tokenFactory.createCloneToken( address(this), _snapshotBlock, _cloneTokenName, _cloneDecimalUnits, _cloneTokenSymbol, _transfersEnabled ); cloneToken.changeController(msg.sender); // An event to make the token easy to find on the blockchain emit NewCloneToken(address(cloneToken), _snapshotBlock); return address(cloneToken); } //////////////// // Generate and destroy tokens //////////////// /// @notice Generates `_amount` tokens that are assigned to `_owner` /// @param _owner The address that will be assigned the new tokens /// @param _amount The quantity of tokens generated /// @return True if the tokens are generated correctly function generateTokens(address _owner, uint _amount ) public onlyController returns (bool) { uint curTotalSupply = totalSupply(); require(curTotalSupply + _amount >= curTotalSupply); // Check for overflow uint previousBalanceTo = balanceOf(_owner); require(previousBalanceTo + _amount >= previousBalanceTo); // Check for overflow updateValueAtNow(totalSupplyHistory, curTotalSupply + _amount); updateValueAtNow(balances[_owner], previousBalanceTo + _amount); emit Transfer(address(0), _owner, _amount); return true; } /// @notice Burns `_amount` tokens from `_owner` /// @param _owner The address that will lose the tokens /// @param _amount The quantity of tokens to burn /// @return True if the tokens are burned correctly function destroyTokens(address _owner, uint _amount ) onlyController public returns (bool) { uint curTotalSupply = totalSupply(); require(curTotalSupply >= _amount); uint previousBalanceFrom = balanceOf(_owner); require(previousBalanceFrom >= _amount); updateValueAtNow(totalSupplyHistory, curTotalSupply - _amount); updateValueAtNow(balances[_owner], previousBalanceFrom - _amount); emit Transfer(_owner, address(0), _amount); return true; } //////////////// // Enable tokens transfers //////////////// /// @notice Enables token holders to transfer their tokens freely if true /// @param _transfersEnabled True if transfers are allowed in the clone function enableTransfers(bool _transfersEnabled) public onlyController { transfersEnabled = _transfersEnabled; } //////////////// // Internal helper functions to query and set a value in a snapshot array //////////////// /// @dev `getValueAt` retrieves the number of tokens at a given block number /// @param checkpoints The history of values being queried /// @param _block The block number to retrieve the value at /// @return The number of tokens being queried function getValueAt(Checkpoint[] storage checkpoints, uint _block ) view internal returns (uint) { if (checkpoints.length == 0) return 0; // Shortcut for the actual value if (_block >= checkpoints[checkpoints.length-1].fromBlock) return checkpoints[checkpoints.length-1].value; if (_block < checkpoints[0].fromBlock) return 0; // Binary search of the value in the array uint min = 0; uint max = checkpoints.length-1; while (max > min) { uint mid = (max + min + 1)/ 2; if (checkpoints[mid].fromBlock<=_block) { min = mid; } else { max = mid-1; } } return checkpoints[min].value; } /// @dev `updateValueAtNow` used to update the `balances` map and the /// `totalSupplyHistory` /// @param checkpoints The history of data being updated /// @param _value The new number of tokens function updateValueAtNow(Checkpoint[] storage checkpoints, uint _value ) internal { if ((checkpoints.length == 0) || (checkpoints[checkpoints.length -1].fromBlock < block.number)) { Checkpoint storage newCheckPoint = checkpoints[ checkpoints.length++ ]; newCheckPoint.fromBlock = uint128(block.number); newCheckPoint.value = uint128(_value); } else { Checkpoint storage oldCheckPoint = checkpoints[checkpoints.length-1]; oldCheckPoint.value = uint128(_value); } } /// @dev Internal function to determine if an address is a contract /// @param _addr The address being queried /// @return True if `_addr` is a contract function isContract(address _addr) view internal returns(bool) { uint size; if (_addr == address(0)) return false; assembly { size := extcodesize(_addr) } return size>0; } /// @dev Helper function to return a min betwen the two uints function min(uint a, uint b) pure internal returns (uint) { return a < b ? a : b; } /// @notice The fallback function: If the contract's controller has not been /// set to 0, then the `proxyPayment` method is called which relays the /// ether and creates tokens as described in the token controller contract function () external payable { require(isContract(controller)); require(TokenController(controller).proxyPayment.value(msg.value)(msg.sender)); } ////////// // Safety Methods ////////// /// @notice This method can be used by the controller to extract mistakenly /// sent tokens to this contract. /// @param _token The address of the token contract that you want to recover /// set to 0 in case you want to extract ether. function claimTokens(address payable _token) public onlyController { if (_token == address(0)) { controller.transfer(address(this).balance); return; } MiniMeToken token = MiniMeToken(_token); uint balance = token.balanceOf(address(this)); token.transfer(controller, balance); emit ClaimedTokens(_token, controller, balance); } //////////////// // Events //////////////// event ClaimedTokens(address indexed _token, address indexed _controller, uint _amount); event Transfer(address indexed _from, address indexed _to, uint256 _amount); event NewCloneToken(address indexed _cloneToken, uint _snapshotBlock); event Approval( address indexed _owner, address indexed _spender, uint256 _amount ); } //////////////// // MiniMeTokenFactory //////////////// /// @dev This contract is used to generate clone contracts from a contract. /// In solidity this is the way to create a contract from a contract of the /// same class contract MiniMeTokenFactory { /// @notice Update the DApp by creating a new token with new functionalities /// the msg.sender becomes the controller of this clone token /// @param _parentToken Address of the token being cloned /// @param _snapshotBlock Block of the parent token that will /// determine the initial distribution of the clone token /// @param _tokenName Name of the new token /// @param _decimalUnits Number of decimals of the new token /// @param _tokenSymbol Token Symbol for the new token /// @param _transfersEnabled If true, tokens will be able to be transferred /// @return The address of the new token contract function createCloneToken( address payable _parentToken, uint _snapshotBlock, string memory _tokenName, uint8 _decimalUnits, string memory _tokenSymbol, bool _transfersEnabled ) public returns (MiniMeToken) { MiniMeToken newToken = new MiniMeToken( address(this), _parentToken, _snapshotBlock, _tokenName, _decimalUnits, _tokenSymbol, _transfersEnabled ); newToken.changeController(msg.sender); return newToken; } } // File: contracts/VestingTokenStep.sol pragma solidity ^0.5.0; contract VestingTokenStep is MiniMeToken { using SafeMath for uint256; bool public initiated; // Durations and timestamps are expressed in UNIX time, the same units as block.timestamp. uint256 public cliff; uint256 public start; uint256 public duration; uint256 public constant UNIT_IN_SECONDS = 60 * 60 * 24 * 30; mapping (address => uint256) public released; constructor ( address tokenFactory, address payable parentToken, uint parentSnapShotBlock, string memory tokenName, uint8 decimalUnits, string memory tokenSymbol, bool transfersEnabled ) public MiniMeToken(tokenFactory, parentToken, parentSnapShotBlock, tokenName, decimalUnits, tokenSymbol, transfersEnabled) { // solhint-disable-previous-line no-empty-blocks } modifier beforeInitiated() { require(!initiated, "VestingTokenStep: cannot execute after initiation"); _; } modifier afterInitiated() { require(initiated, "VestingTokenStep: cannot execute before initiation"); _; } /** * @notice Makes vested tokens releasable. * @param _start the time (as Unix time) at which point vesting starts * @param cliffDuration duration in unit(30 days) of the cliff in which tokens will begin to vest * @param _duration duration in unit(30 days) of the period in which the tokens will vest(after the cliff period) */ function initiate(uint256 _start, uint256 cliffDuration, uint256 _duration) public beforeInitiated onlyController { initiated = true; enableTransfers(false); // solhint-disable-next-line max-line-length require(cliffDuration <= _duration, "VestingTokenStep: cliff is longer than duration"); require(_duration != 0, "VestingTokenStep: duration is 0"); // solhint-disable-next-line max-line-length require(_start.add(_duration.mul(UNIT_IN_SECONDS)) > block.timestamp, "VestingTokenStep: final time is before current time"); duration = _duration; start = _start; cliff = start.add(cliffDuration.mul(UNIT_IN_SECONDS)); } /** * @dev This is the actual transfer function in the token contract. * @param from The address holding the tokens being transferred * @param to The address of the recipient * @param amount The amount of tokens to be transferred */ function doTransfer(address from, address to, uint amount) internal beforeInitiated { super.doTransfer(from, to, amount); } /** * @notice Destroys releasable tokens. * @param beneficiary the beneficiary of the tokens. */ function destroyReleasableTokens(address beneficiary) public afterInitiated onlyController returns (uint256 unreleased) { unreleased = releasableAmount(beneficiary); require(unreleased != 0, "VestingTokenStep: no tokens are due"); released[beneficiary] = released[beneficiary].add(unreleased); require(destroyTokens(beneficiary, unreleased), "VestingTokenStep: failed to destroy tokens"); } /** * @dev Calculates the amount that has already vested but hasn't been released yet. * @param beneficiary the beneficiary of the tokens. */ function releasableAmount(address beneficiary) public view returns (uint256) { return _vestedAmount(beneficiary).sub(released[beneficiary]); } /** * @dev Calculates the amount that has already vested. * @param beneficiary the beneficiary of the tokens. */ function _vestedAmount(address beneficiary) private view returns (uint256) { if (!initiated) { return 0; } uint256 currentVestedAmount = balanceOf(beneficiary); uint256 totalVestedAmount = currentVestedAmount.add(released[beneficiary]); if (block.timestamp < cliff) { return 0; } else if (block.timestamp >= cliff.add(duration.mul(UNIT_IN_SECONDS))) { return totalVestedAmount; } else { uint256 currenUnit = block.timestamp.sub(cliff).div(UNIT_IN_SECONDS).add(1); return totalVestedAmount.mul(currenUnit).div(duration); } } } // File: contracts/TONVault.sol pragma solidity ^0.5.0; contract TONVault is Secondary { using SafeMath for uint256; ERC20Mintable public ton; constructor (ERC20Mintable tonToken) public { ton = tonToken; } function setApprovalAmount(address approval, uint256 amount) public onlyPrimary { ton.approve(approval, amount); } function withdraw(uint256 amount, address recipient) public onlyPrimary { ton.transfer(recipient, amount); } } // File: contracts/Burner.sol pragma solidity ^0.5.0; contract Burner { constructor () public { } } // File: contracts/Swapper.sol pragma solidity ^0.5.0; contract Swapper is Secondary { using SafeMath for uint256; mapping(address => uint256) public ratio; ERC20Mintable public _token; IERC20 public mton; TONVault public vault; address public constant burner = 0x0000000000000000000000000000000000000001; uint256 public startTimestamp; event Swapped(address account, uint256 unreleased, uint256 transferred); event Withdrew(address recipient, uint256 amount); event UpdateRatio(address vestingToken, uint256 tokenRatio); event SetVault(address vaultAddress); modifier onlyBeforeStart() { require(block.timestamp < startTimestamp || startTimestamp == 0, "Swapper: cannot execute after start"); _; } constructor (ERC20Mintable token, address mtonAddress) public { _token = token; mton = IERC20(mtonAddress); } function updateRatio(address vestingToken, uint256 tokenRatio) external onlyPrimary onlyBeforeStart { ratio[vestingToken] = tokenRatio; emit UpdateRatio(vestingToken, tokenRatio); } function setStart(uint256 _startTimestamp) external onlyPrimary { require(startTimestamp == 0, "Swapper: the starttime is already set"); startTimestamp = _startTimestamp; } function swap(address payable vestingToken) external returns (bool) { uint256 tokenRatio = ratio[vestingToken]; require(tokenRatio != 0, "VestingSwapper: not valid sale token address"); uint256 unreleased = releasableAmount(vestingToken, msg.sender); if (unreleased == 0) { return true; } if (vestingToken == address(mton)) { mton.transferFrom(msg.sender, address(this), unreleased); mton.transfer(burner, unreleased); } else { unreleased = VestingTokenStep(vestingToken).destroyReleasableTokens(msg.sender); } uint256 ton_amount = unreleased.mul(tokenRatio); _token.transferFrom(address(vault), address(this), ton_amount); _token.transfer(msg.sender, ton_amount); emit Swapped(msg.sender, unreleased, ton_amount); return true; } // TokenController /// @notice Called when `_owner` sends ether to the MiniMe Token contract /// @param _owner The address that sent the ether to create tokens /// @return True if the ether is accepted, false if it throws function proxyPayment(address _owner) public payable returns(bool) { return true; } /// @notice Notifies the controller about a token transfer allowing the /// controller to react if desired /// @param _from The origin of the transfer /// @param _to The destination of the transfer /// @param _amount The amount of the transfer /// @return False if the controller does not authorize the transfer function onTransfer(address _from, address _to, uint _amount) public returns(bool) { return true; } /// @notice Notifies the controller about an approval allowing the /// controller to react if desired /// @param _owner The address that calls `approve()` /// @param _spender The spender in the `approve()` call /// @param _amount The amount in the `approve()` call /// @return False if the controller does not authorize the approval function onApprove(address _owner, address _spender, uint _amount) public returns(bool) { return true; } function releasableAmount(address payable vestingToken, address beneficiary) public view returns (uint256) { if (vestingToken == address(mton)) { return mton.balanceOf(beneficiary); } else { return VestingTokenStep(vestingToken).releasableAmount(beneficiary); } } function changeController(VestingTokenStep vestingToken, address payable newController) external onlyPrimary { vestingToken.changeController(newController); } function setVault(TONVault vaultAddress) external onlyPrimary { vault = vaultAddress; emit SetVault(address(vaultAddress)); } }
Contract Security Audit
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Swarm Source
bzzr://19e4079c74208f12e8dd48bc05014cca1ae26def02919c95d5c796a907b24e59
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Multichain Portfolio | 30 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.