Create EIP223.sol

ERC223Basic additions to ERC20Basic

contracts/eip20/EIP223.sol

@@ -0,0 +1,329 @@
+pragma solidity 0.4.24;
+
+interface ERC20 {
+
+    event Transfer(address indexed from, address indexed to, uint256 value);
+    event Approval(address indexed owner, address indexed spender, uint256 value);
+
+    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);
+}
+
+/**
+ * @title ERC223Basic additions to ERC20Basic
+ * @dev see also: https://github.com/ethereum/EIPs/issues/223               
+ *
+*/
+contract ERC223 is ERC20 {
+
+    event Transfer(address indexed _from, address indexed _to, uint256 _value, bytes indexed _data);
+
+    function transfer(address _to, uint256 _value, bytes _data) public returns (bool success);
+    function contractFallback(address _to, uint _value, bytes _data) internal returns (bool success);
+    function isContract(address _addr) internal view returns (bool);
+}
+
+/**
+ * @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 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;
+    }
+
+    /**
+    * @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(msg.sender == owner_, "Only the owner can call this function.");
+        _;
+    }
+
+    /**
+    * @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), "Cannot transfer ownership to zero address.");
+        emit OwnershipTransferred(owner_, _newOwner);
+        owner_ = _newOwner;
+    }
+}
+
+/**
+ * @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;
+    }
+}
+
+contract Generic223Receiver {
+    uint public sentValue;
+    address public tokenAddr;
+    address public tokenSender;
+    bool public calledFoo;
+
+    bytes public tokenData;
+    bytes4 public tokenSig;
+
+    Tkn private tkn;
+
+    bool private __isTokenFallback;
+
+    struct Tkn {
+        address addr;
+        address sender;
+        uint256 value;
+        bytes data;
+        bytes4 sig;
+    }
+
+    modifier tokenPayable {
+        assert(__isTokenFallback);
+        _;
+    }
+
+    function tokenFallback(address _sender, uint _value, bytes _data) public returns (bool success) {
+
+        tkn = Tkn(msg.sender, _sender, _value, _data, getSig(_data));
+        __isTokenFallback = true;
+        address(this).delegatecall(_data);
+        __isTokenFallback = false;
+        return true;
+    }
+
+    function foo() public tokenPayable {
+        saveTokenValues();
+        calledFoo = true;
+    }
+
+    function getSig(bytes _data) private pure returns (bytes4 sig) {
+        uint lngth = _data.length < 4 ? _data.length : 4;
+        for (uint i = 0; i < lngth; i++) {
+            sig = bytes4(uint(sig) + uint(_data[i]) * (2 ** (8 * (lngth - 1 - i))));
+        }
+    }
+
+    function saveTokenValues() private {
+        tokenAddr = tkn.addr;
+        tokenSender = tkn.sender;
+        sentValue = tkn.value;
+        tokenSig = tkn.sig;
+        tokenData = tkn.data;
+    }
+}
+
+contract Regium is ERC223, Ownable {
+
+    using SafeMath for uint256;
+
+    string private name_ = "Regium";
+    string private symbol_ = "REGI";
+    uint256 private decimals_ = 18;
+    uint256 public totalSupply = 7200000 * (10 ** decimals_);
+
+    event Transfer(address indexed from, address indexed to, uint256 value);
+    event Approval(address indexed owner, address indexed spender, uint256 value);
+
+    mapping (address => uint256) internal balances_;
+    mapping (address => mapping (address => uint256)) private allowed_;
+
+    constructor() public {
+        balances_[msg.sender] = balances_[msg.sender].add(totalSupply);
+        emit Transfer(address(0), msg.sender, totalSupply);
+    }
+
+    function() public payable { revert("Cannot send ETH to this address."); }
+
+    function name() public view returns(string) {
+        return name_;
+    }
+
+    function symbol() public view returns(string) {
+        return symbol_;
+    }
+
+    function decimals() public view returns(uint256) {
+        return decimals_;
+    }
+
+    function totalSupply() public view returns (uint256) {
+        return totalSupply;
+    }
+
+    function safeTransfer(address _to, uint256 _value) public {
+        require(transfer(_to, _value), "Transfer failed.");
+    }
+
+    function safeTransferFrom(address _from, address _to, uint256 _value) public {
+        require(transferFrom(_from, _to, _value), "Transfer failed.");
+    }
+
+    function safeApprove( address _spender, uint256 _currentValue, uint256 _value ) public {
+        require(allowed_[msg.sender][_spender] == _currentValue, "Current allowance value does not match.");
+        approve(_spender, _value);
+    }
+
+    // ERC20
+    function balanceOf(address _owner) public view returns (uint256) {
+        return balances_[_owner];
+    }
+
+    function allowance(address _owner, address _spender) public view returns (uint256) {
+        return allowed_[_owner][_spender];
+    }
+
+    function transfer(address _to, uint256 _value) public returns (bool) {
+        require(_value <= balances_[msg.sender], "Value exceeds balance of msg.sender.");
+        require(_to != address(0), "Cannot send tokens to zero address.");
+
+        balances_[msg.sender] = balances_[msg.sender].sub(_value);
+        balances_[_to] = balances_[_to].add(_value);
+        emit Transfer(msg.sender, _to, _value);
+        return true;
+    }
+
+    function approve(address _spender, uint256 _value) public returns (bool) {
+        allowed_[msg.sender][_spender] = _value;
+        emit Approval(msg.sender, _spender, _value);
+        return true;
+    }
+
+    function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
+        require(_value <= balances_[_from], "Value exceeds balance of msg.sender.");
+        require(_value <= allowed_[_from][msg.sender], "Value exceeds allowance of msg.sender for this owner.");
+        require(_to != address(0), "Cannot send tokens to zero address.");
+
+        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;
+    }
+
+    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;
+    }
+
+    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;
+    }
+
+    // ERC223
+    function transfer(address _to, uint _value, bytes _data) public returns (bool success) {
+        require(_to != address(0), "Cannot transfer token to zero address.");
+        require(_value <= balanceOf(msg.sender), "Value exceeds balance of msg.sender.");
+
+        transfer(_to, _value);
+
+        if (isContract(_to)) {
+            return contractFallback(_to, _value, _data);
+        }
+        return true;
+    }
+
+    function contractFallback(address _to, uint _value, bytes _data) internal returns (bool success) {
+        Generic223Receiver receiver = Generic223Receiver(_to);
+        return receiver.tokenFallback(msg.sender, _value, _data);
+    }
+
+    // Assemble the given address bytecode. If bytecode exists then the _addr is a contract.
+    function isContract(address _addr) internal view returns (bool) {
+        // retrieve the size of the code on target address, this needs assembly
+        uint length;
+        assembly { length := extcodesize(_addr) }
+        return length > 0;
+    }
+}