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ERC-20
Energy Sector
Overview
Max Total Supply
1,165,794.215755392622995656 EWTB
Holders
8,322 (0.00%)
Market
Price
$1.53 @ 0.000572 ETH (+0.66%)
Onchain Market Cap
$1,778,613.71
Circulating Supply Market Cap
$45,864,810.52
Other Info
Token Contract (WITH 18 Decimals)
Balance
0.006819666206761159 EWTBValue
$0.01 ( ~3.749042395758E-06 Eth) [0.0000%]Loading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
ERC677BridgeToken
Compiler Version
v0.4.24+commit.e67f0147
Optimization Enabled:
Yes with 200 runs
Other Settings:
byzantium EvmVersion
Contract Source Code (Solidity)
/** *Submitted for verification at Etherscan.io on 2020-04-06 */ // File: openzeppelin-solidity/contracts/token/ERC20/ERC20Basic.sol pragma solidity ^0.4.24; /** * @title ERC20Basic * @dev Simpler version of ERC20 interface * See https://github.com/ethereum/EIPs/issues/179 */ contract ERC20Basic { function totalSupply() public view returns (uint256); function balanceOf(address _who) public view returns (uint256); function transfer(address _to, uint256 _value) public returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); } // File: openzeppelin-solidity/contracts/math/SafeMath.sol pragma solidity ^0.4.24; /** * @title SafeMath * @dev Math operations with safety checks that throw on error */ library SafeMath { /** * @dev Multiplies two numbers, throws on overflow. */ function mul(uint256 _a, uint256 _b) internal pure returns (uint256 c) { // Gas optimization: this is cheaper than asserting '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; } c = _a * _b; assert(c / _a == _b); return c; } /** * @dev Integer division of two numbers, truncating the quotient. */ function div(uint256 _a, uint256 _b) internal pure returns (uint256) { // assert(_b > 0); // Solidity automatically throws when dividing by 0 // uint256 c = _a / _b; // assert(_a == _b * c + _a % _b); // There is no case in which this doesn't hold return _a / _b; } /** * @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend). */ function sub(uint256 _a, uint256 _b) internal pure returns (uint256) { assert(_b <= _a); return _a - _b; } /** * @dev Adds two numbers, throws on overflow. */ function add(uint256 _a, uint256 _b) internal pure returns (uint256 c) { c = _a + _b; assert(c >= _a); return c; } } // File: openzeppelin-solidity/contracts/token/ERC20/BasicToken.sol pragma solidity ^0.4.24; /** * @title Basic token * @dev Basic version of StandardToken, with no allowances. */ contract BasicToken is ERC20Basic { using SafeMath for uint256; mapping(address => uint256) internal balances; uint256 internal totalSupply_; /** * @dev Total number of tokens in existence */ function totalSupply() public view returns (uint256) { return totalSupply_; } /** * @dev Transfer token for a specified address * @param _to The address to transfer to. * @param _value The amount to be transferred. */ function transfer(address _to, uint256 _value) public returns (bool) { require(_value <= balances[msg.sender]); require(_to != address(0)); balances[msg.sender] = balances[msg.sender].sub(_value); balances[_to] = balances[_to].add(_value); emit Transfer(msg.sender, _to, _value); return true; } /** * @dev Gets the balance of the specified address. * @param _owner The address to query the the balance of. * @return An uint256 representing the amount owned by the passed address. */ function balanceOf(address _owner) public view returns (uint256) { return balances[_owner]; } } // File: openzeppelin-solidity/contracts/token/ERC20/BurnableToken.sol pragma solidity ^0.4.24; /** * @title Burnable Token * @dev Token that can be irreversibly burned (destroyed). */ contract BurnableToken is BasicToken { event Burn(address indexed burner, uint256 value); /** * @dev Burns a specific amount of tokens. * @param _value The amount of token to be burned. */ function burn(uint256 _value) public { _burn(msg.sender, _value); } function _burn(address _who, uint256 _value) internal { require(_value <= balances[_who]); // no need to require value <= totalSupply, since that would imply the // sender's balance is greater than the totalSupply, which *should* be an assertion failure balances[_who] = balances[_who].sub(_value); totalSupply_ = totalSupply_.sub(_value); emit Burn(_who, _value); emit Transfer(_who, address(0), _value); } } // File: openzeppelin-solidity/contracts/token/ERC20/ERC20.sol pragma solidity ^0.4.24; /** * @title ERC20 interface * @dev see https://github.com/ethereum/EIPs/issues/20 */ contract ERC20 is ERC20Basic { function allowance(address _owner, address _spender) public view returns (uint256); function transferFrom(address _from, address _to, uint256 _value) public returns (bool); function approve(address _spender, uint256 _value) public returns (bool); event Approval( address indexed owner, address indexed spender, uint256 value ); } // File: openzeppelin-solidity/contracts/token/ERC20/StandardToken.sol pragma solidity ^0.4.24; /** * @title Standard ERC20 token * * @dev Implementation of the basic standard token. * https://github.com/ethereum/EIPs/issues/20 * Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol */ contract StandardToken is ERC20, BasicToken { mapping (address => mapping (address => uint256)) internal allowed; /** * @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 */ function transferFrom( address _from, address _to, uint256 _value ) public returns (bool) { require(_value <= balances[_from]); require(_value <= allowed[_from][msg.sender]); require(_to != address(0)); balances[_from] = balances[_from].sub(_value); balances[_to] = balances[_to].add(_value); allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value); emit Transfer(_from, _to, _value); return true; } /** * @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. */ function approve(address _spender, uint256 _value) public returns (bool) { allowed[msg.sender][_spender] = _value; emit Approval(msg.sender, _spender, _value); return true; } /** * @dev Function to check the amount of tokens that an owner allowed to a spender. * @param _owner address The address which owns the funds. * @param _spender address The address which will spend the funds. * @return A uint256 specifying the amount of tokens still available for the spender. */ function allowance( address _owner, address _spender ) public view returns (uint256) { return allowed[_owner][_spender]; } /** * @dev Increase the amount of tokens that an owner allowed to a spender. * approve should be called when allowed[_spender] == 0. To increment * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol * @param _spender The address which will spend the funds. * @param _addedValue The amount of tokens to increase the allowance by. */ function increaseApproval( address _spender, uint256 _addedValue ) public returns (bool) { allowed[msg.sender][_spender] = ( allowed[msg.sender][_spender].add(_addedValue)); emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } /** * @dev Decrease the amount of tokens that an owner allowed to a spender. * approve should be called when allowed[_spender] == 0. To decrement * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol * @param _spender The address which will spend the funds. * @param _subtractedValue The amount of tokens to decrease the allowance by. */ function decreaseApproval( address _spender, uint256 _subtractedValue ) public returns (bool) { uint256 oldValue = allowed[msg.sender][_spender]; if (_subtractedValue >= oldValue) { allowed[msg.sender][_spender] = 0; } else { allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue); } emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } } // File: openzeppelin-solidity/contracts/ownership/Ownable.sol pragma solidity ^0.4.24; /** * @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 public owner; event OwnershipRenounced(address indexed previousOwner); event OwnershipTransferred( address indexed previousOwner, address indexed newOwner ); /** * @dev The Ownable constructor sets the original `owner` of the contract to the sender * account. */ constructor() public { owner = msg.sender; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(msg.sender == owner); _; } /** * @dev Allows the current owner to relinquish control of the contract. * @notice Renouncing to ownership will leave the contract without an owner. * It will not be possible to call the functions with the `onlyOwner` * modifier anymore. */ function renounceOwnership() public onlyOwner { emit OwnershipRenounced(owner); 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; } } // File: openzeppelin-solidity/contracts/token/ERC20/MintableToken.sol pragma solidity ^0.4.24; /** * @title Mintable token * @dev Simple ERC20 Token example, with mintable token creation * Based on code by TokenMarketNet: https://github.com/TokenMarketNet/ico/blob/master/contracts/MintableToken.sol */ contract MintableToken is StandardToken, Ownable { event Mint(address indexed to, uint256 amount); event MintFinished(); bool public mintingFinished = false; modifier canMint() { require(!mintingFinished); _; } modifier hasMintPermission() { require(msg.sender == owner); _; } /** * @dev Function to mint tokens * @param _to The address that will receive the minted tokens. * @param _amount The amount of tokens to mint. * @return A boolean that indicates if the operation was successful. */ function mint( address _to, uint256 _amount ) public hasMintPermission canMint returns (bool) { totalSupply_ = totalSupply_.add(_amount); balances[_to] = balances[_to].add(_amount); emit Mint(_to, _amount); emit Transfer(address(0), _to, _amount); return true; } /** * @dev Function to stop minting new tokens. * @return True if the operation was successful. */ function finishMinting() public onlyOwner canMint returns (bool) { mintingFinished = true; emit MintFinished(); return true; } } // File: openzeppelin-solidity/contracts/token/ERC20/DetailedERC20.sol pragma solidity ^0.4.24; /** * @title DetailedERC20 token * @dev The decimals are only for visualization purposes. * All the operations are done using the smallest and indivisible token unit, * just as on Ethereum all the operations are done in wei. */ contract DetailedERC20 is ERC20 { string public name; string public symbol; uint8 public decimals; constructor(string _name, string _symbol, uint8 _decimals) public { name = _name; symbol = _symbol; decimals = _decimals; } } // File: openzeppelin-solidity/contracts/AddressUtils.sol pragma solidity ^0.4.24; /** * Utility library of inline functions on addresses */ library AddressUtils { /** * Returns whether the target address is a contract * @dev This function will return false if invoked during the constructor of a contract, * as the code is not actually created until after the constructor finishes. * @param _addr address to check * @return whether the target address is a contract */ function isContract(address _addr) internal view returns (bool) { uint256 size; // XXX Currently there is no better way to check if there is a contract in an address // than to check the size of the code at that address. // See https://ethereum.stackexchange.com/a/14016/36603 // for more details about how this works. // TODO Check this again before the Serenity release, because all addresses will be // contracts then. // solium-disable-next-line security/no-inline-assembly assembly { size := extcodesize(_addr) } return size > 0; } } // File: contracts/interfaces/ERC677.sol pragma solidity 0.4.24; contract ERC677 is ERC20 { event Transfer(address indexed from, address indexed to, uint256 value, bytes data); function transferAndCall(address, uint256, bytes) external returns (bool); function increaseAllowance(address spender, uint256 addedValue) public returns (bool); function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool); } // File: contracts/interfaces/IBurnableMintableERC677Token.sol pragma solidity 0.4.24; contract IBurnableMintableERC677Token is ERC677 { function mint(address _to, uint256 _amount) public returns (bool); function burn(uint256 _value) public; function claimTokens(address _token, address _to) public; } // File: contracts/upgradeable_contracts/Sacrifice.sol pragma solidity 0.4.24; contract Sacrifice { constructor(address _recipient) public payable { selfdestruct(_recipient); } } // File: contracts/upgradeable_contracts/Claimable.sol pragma solidity 0.4.24; contract Claimable { bytes4 internal constant TRANSFER = 0xa9059cbb; // transfer(address,uint256) modifier validAddress(address _to) { require(_to != address(0)); /* solcov ignore next */ _; } function claimValues(address _token, address _to) internal { if (_token == address(0)) { claimNativeCoins(_to); } else { claimErc20Tokens(_token, _to); } } function claimNativeCoins(address _to) internal { uint256 value = address(this).balance; if (!_to.send(value)) { (new Sacrifice).value(value)(_to); } } function claimErc20Tokens(address _token, address _to) internal { ERC20Basic token = ERC20Basic(_token); uint256 balance = token.balanceOf(this); safeTransfer(_token, _to, balance); } function safeTransfer(address _token, address _to, uint256 _value) internal { bytes memory returnData; bool returnDataResult; bytes memory callData = abi.encodeWithSelector(TRANSFER, _to, _value); assembly { let result := call(gas, _token, 0x0, add(callData, 0x20), mload(callData), 0, 32) returnData := mload(0) returnDataResult := mload(0) switch result case 0 { revert(0, 0) } } // Return data is optional if (returnData.length > 0) { require(returnDataResult); } } } // File: contracts/ERC677BridgeToken.sol pragma solidity 0.4.24; contract ERC677BridgeToken is IBurnableMintableERC677Token, DetailedERC20, BurnableToken, MintableToken, Claimable { address public bridgeContract; event ContractFallbackCallFailed(address from, address to, uint256 value); constructor(string _name, string _symbol, uint8 _decimals) public DetailedERC20(_name, _symbol, _decimals) { // solhint-disable-previous-line no-empty-blocks } function setBridgeContract(address _bridgeContract) external onlyOwner { require(AddressUtils.isContract(_bridgeContract)); bridgeContract = _bridgeContract; } modifier validRecipient(address _recipient) { require(_recipient != address(0) && _recipient != address(this)); /* solcov ignore next */ _; } function transferAndCall(address _to, uint256 _value, bytes _data) external validRecipient(_to) returns (bool) { require(superTransfer(_to, _value)); emit Transfer(msg.sender, _to, _value, _data); if (AddressUtils.isContract(_to)) { require(contractFallback(msg.sender, _to, _value, _data)); } return true; } function getTokenInterfacesVersion() external pure returns (uint64 major, uint64 minor, uint64 patch) { return (2, 2, 0); } function superTransfer(address _to, uint256 _value) internal returns (bool) { return super.transfer(_to, _value); } function transfer(address _to, uint256 _value) public returns (bool) { require(superTransfer(_to, _value)); callAfterTransfer(msg.sender, _to, _value); return true; } function transferFrom(address _from, address _to, uint256 _value) public returns (bool) { require(super.transferFrom(_from, _to, _value)); callAfterTransfer(_from, _to, _value); return true; } function callAfterTransfer(address _from, address _to, uint256 _value) internal { if (AddressUtils.isContract(_to) && !contractFallback(_from, _to, _value, new bytes(0))) { require(_to != bridgeContract); emit ContractFallbackCallFailed(_from, _to, _value); } } function contractFallback(address _from, address _to, uint256 _value, bytes _data) private returns (bool) { return _to.call(abi.encodeWithSignature("onTokenTransfer(address,uint256,bytes)", _from, _value, _data)); } function finishMinting() public returns (bool) { revert(); } function renounceOwnership() public onlyOwner { revert(); } function claimTokens(address _token, address _to) public onlyOwner validAddress(_to) { claimValues(_token, _to); } function increaseAllowance(address spender, uint256 addedValue) public returns (bool) { return super.increaseApproval(spender, addedValue); } function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) { return super.decreaseApproval(spender, subtractedValue); } }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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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)
000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a000000000000000000000000000000000000000000000000000000000000000120000000000000000000000000000000000000000000000000000000000000018456e657267792057656220546f6b656e2042726964676564000000000000000000000000000000000000000000000000000000000000000000000000000000044557544200000000000000000000000000000000000000000000000000000000
-----Decoded View---------------
Arg [0] : _name (string): Energy Web Token Bridged
Arg [1] : _symbol (string): EWTB
Arg [2] : _decimals (uint8): 18
-----Encoded View---------------
7 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000060
Arg [1] : 00000000000000000000000000000000000000000000000000000000000000a0
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000012
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000018
Arg [4] : 456e657267792057656220546f6b656e20427269646765640000000000000000
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000004
Arg [6] : 4557544200000000000000000000000000000000000000000000000000000000
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