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Private Name Tags
ContractCreator
Latest 25 from a total of 1,570 transactions
Transaction Hash |
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Swap | 8653316 | 1762 days ago | IN | 0 ETH | 0.00004138 | ||||
Swap | 8653141 | 1763 days ago | IN | 0 ETH | 0.00005638 | ||||
Swap | 8650817 | 1763 days ago | IN | 0 ETH | 0.00045107 | ||||
Swap | 8650526 | 1763 days ago | IN | 0 ETH | 0.00062076 | ||||
Swap | 8650446 | 1763 days ago | IN | 0 ETH | 0.00084576 | ||||
Swap | 8650330 | 1763 days ago | IN | 0 ETH | 0.00028192 | ||||
Swap | 8650032 | 1763 days ago | IN | 0 ETH | 0.00028192 | ||||
Swap | 8649069 | 1763 days ago | IN | 0 ETH | 0.00129683 | ||||
Swap | 8648159 | 1763 days ago | IN | 0 ETH | 0.00086906 | ||||
Swap | 8648031 | 1763 days ago | IN | 0 ETH | 0.00118406 | ||||
Swap | 8647834 | 1763 days ago | IN | 0 ETH | 0.00056384 | ||||
Swap | 8647703 | 1763 days ago | IN | 0 ETH | 0.00056384 | ||||
Swap | 8646509 | 1764 days ago | IN | 0 ETH | 0.00056384 | ||||
Swap | 8642934 | 1764 days ago | IN | 0 ETH | 0.00084576 | ||||
Swap | 8641973 | 1764 days ago | IN | 0 ETH | 0.00062022 | ||||
Swap | 8637768 | 1765 days ago | IN | 0 ETH | 0.00095852 | ||||
Swap | 8636372 | 1765 days ago | IN | 0 ETH | 0.00062022 | ||||
Swap | 8628107 | 1766 days ago | IN | 0 ETH | 0.00062076 | ||||
Swap | 8623958 | 1767 days ago | IN | 0 ETH | 0.00062022 | ||||
Swap | 8623819 | 1767 days ago | IN | 0 ETH | 0.00062022 | ||||
Swap | 8623786 | 1767 days ago | IN | 0 ETH | 0.00091044 | ||||
Swap | 8623727 | 1767 days ago | IN | 0 ETH | 0.00062022 | ||||
Swap | 8621747 | 1767 days ago | IN | 0 ETH | 0.00056384 | ||||
Swap | 8615394 | 1768 days ago | IN | 0 ETH | 0.00062076 | ||||
Swap | 8615254 | 1768 days ago | IN | 0 ETH | 0.00082768 |
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Contract Name:
TokenSwap
Compiler Version
v0.5.2+commit.1df8f40c
Optimization Enabled:
No with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity)
/** *Submitted for verification at Etherscan.io on 2019-04-12 */ pragma solidity ^0.5.2; /** * @title SafeMath * @dev Unsigned math operations with safety checks that revert on error */ library SafeMath { /** * @dev Multiplies two unsigned integers, reverts on 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); return c; } /** * @dev Integer division of two unsigned integers truncating the quotient, reverts on division by zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Subtracts two unsigned integers, reverts on overflow (i.e. if subtrahend is greater than minuend). */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { require(b <= a); uint256 c = a - b; return c; } /** * @dev Adds two unsigned integers, reverts on overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a); return c; } /** * @dev Divides two unsigned integers and returns the remainder (unsigned integer modulo), * reverts when dividing by zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { require(b != 0); return a % b; } } /** * @title Ownable * @dev The Ownable contract has an owner address, and provides basic authorization control * functions, this simplifies the implementation of "user permissions". */ contract Ownable { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev The Ownable constructor sets the original `owner` of the contract to the sender * account. */ constructor () internal { _owner = msg.sender; emit OwnershipTransferred(address(0), _owner); } /** * @return the address of the owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(isOwner()); _; } /** * @return true if `msg.sender` is the owner of the contract. */ function isOwner() public view returns (bool) { return msg.sender == _owner; } /** * @dev Allows the current owner to relinquish control of the contract. * It will not be possible to call the functions with the `onlyOwner` * modifier anymore. * @notice Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Allows the current owner to transfer control of the contract to a newOwner. * @param newOwner The address to transfer ownership to. */ function transferOwnership(address newOwner) public onlyOwner { _transferOwnership(newOwner); } /** * @dev Transfers control of the contract to a newOwner. * @param newOwner The address to transfer ownership to. */ function _transferOwnership(address newOwner) internal { require(newOwner != address(0)); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } /** * @title ERC20 interface * @dev see https://eips.ethereum.org/EIPS/eip-20 */ interface IERC20 { function transfer(address to, uint256 value) external returns (bool); function approve(address spender, uint256 value) external returns (bool); function transferFrom(address from, address to, uint256 value) external returns (bool); function totalSupply() external view returns (uint256); function balanceOf(address who) external view returns (uint256); function allowance(address owner, address spender) external view returns (uint256); event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); } contract TokenSwap is Ownable { using SafeMath for uint256; IERC20 private _fromToken; IERC20 private _toToken; uint256 private _rate; event Swap(address indexed sender, uint256 indexed fromTokenAmount, uint256 indexed toTokenAmount); event Deactivate(uint256 indexed amount); constructor( address fromToken, address toToken, uint256 rate ) Ownable() public { require(fromToken != address(0x0) && toToken != address(0x0), "token address can not be 0."); require(rate > 0, "swap rate can not be 0."); _fromToken = IERC20(fromToken); _toToken = IERC20(toToken); _rate = rate; } function swap() external returns (bool) { uint256 allowance = _fromToken.allowance(msg.sender, address(this)); require(allowance > 0, "sender need to approve token to swap contract."); if (_fromToken.transferFrom(msg.sender, address(0x0), allowance)) { // It only works correctly when the rate is 1000. uint256 swappedValue = allowance.add(999); swappedValue = swappedValue.div(_rate); require(_toToken.transferFrom(Ownable.owner(), msg.sender, swappedValue)); emit Swap(msg.sender, allowance, swappedValue); } return true; } function deactivate() external onlyOwner { uint256 reserve = _fromToken.balanceOf(address(this)); require(_fromToken.transfer(address(0x0), reserve)); emit Deactivate(reserve); } }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"constant":false,"inputs":[],"name":"deactivate","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"renounceOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"swap","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"isOwner","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"inputs":[{"name":"fromToken","type":"address"},{"name":"toToken","type":"address"},{"name":"rate","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"name":"sender","type":"address"},{"indexed":true,"name":"fromTokenAmount","type":"uint256"},{"indexed":true,"name":"toTokenAmount","type":"uint256"}],"name":"Swap","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"amount","type":"uint256"}],"name":"Deactivate","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"previousOwner","type":"address"},{"indexed":true,"name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"}]
Contract Creation Code
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Deployed Bytecode
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000bd168cbf9d3a375b38dc51a202b5e8a4e52069ed000000000000000000000000ce5114d7fa8361f0c088ee26fa3a5446c4a1f50b00000000000000000000000000000000000000000000000000000000000003e8
-----Decoded View---------------
Arg [0] : fromToken (address): 0xbD168CbF9d3a375B38dC51A202B5E8a4E52069Ed
Arg [1] : toToken (address): 0xce5114d7fa8361F0c088EE26FA3A5446C4a1f50b
Arg [2] : rate (uint256): 1000
-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 000000000000000000000000bd168cbf9d3a375b38dc51a202b5e8a4e52069ed
Arg [1] : 000000000000000000000000ce5114d7fa8361f0c088ee26fa3a5446c4a1f50b
Arg [2] : 00000000000000000000000000000000000000000000000000000000000003e8
Swarm Source
bzzr://a0ee78a1d6887c253663eaa4c62c53771f62bb1d07eb1db879e7b3158dd54dcc
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Multichain Portfolio | 26 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.