Contract Address Details

0xE1A400f340bf4eeDbc4Bbb553f1BFf7Ec4656E3e

ERC677BridgeToken Dai Stablecoin (DAI) Last Balance Update: Block #7008294
Created by 0x2fdf–06a8ff at 0xc699–f25356

Balance

0 Ether

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Contract name:
ERC677BridgeToken




Optimization enabled
true
Compiler version
v0.4.24+commit.e67f0147




Optimization runs
200
EVM Version
byzantium

Constructor Arguments

000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000012000000000000000000000000000000000000000000000000000000000000000e44616920537461626c65636f696e00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000034441490000000000000000000000000000000000000000000000000000000000
              

Contract source code

/**
* Submitted for verification at blockscout.com on 2020-07-08 17:50:29.699795Z
*/
// 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 internal bridgeContractAddr;
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 bridgeContract() external view returns (address) {
return bridgeContractAddr;
}
function setBridgeContract(address _bridgeContract) external onlyOwner {
require(AddressUtils.isContract(_bridgeContract));
bridgeContractAddr = _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(!isBridge(_to));
emit ContractFallbackCallFailed(_from, _to, _value);
}
}
function isBridge(address _address) public view returns (bool) {
return _address == bridgeContractAddr;
}
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 ABI

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           

Contract Byte Code

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