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pragma solidity ^0.4.22;
contract ERC20Interface {
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address _owner, address _spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint256 _value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint value);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
contract ERC223Interface {
uint public totalSupply;
function transfer(address to, uint value, bytes data) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint value, bytes data);
}
contract owned {
address public owner;
constructor() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
}
contract ContractReceiver {
struct TKN {
address sender;
uint value;
bytes data;
bytes4 sig;
}
function tokenFallback(address _from, uint _value, bytes _data) public pure {
TKN memory tkn;
tkn.sender = _from;
tkn.value = _value;
tkn.data = _data;
uint32 u = uint32(_data[3]) + (uint32(_data[2]) << 8) + (uint32(_data[1]) << 16) + (uint32(_data[0]) << 24);
tkn.sig = bytes4(u);
}
}
library SafeMath {
function mul(uint a, uint b) internal pure returns (uint) {
uint c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint a, uint b) internal pure returns (uint) {
uint c = a / b;
return c;
}
function sub(uint a, uint b) internal pure returns (uint) {
assert(b <= a);
return a - b;
}
function add(uint a, uint b) internal pure returns (uint) {
uint c = a + b;
assert(c >= a);
return c;
}
}
contract TimeVaultInterface is ERC20Interface, ERC223Interface {
function timeVault(address who) public constant returns (uint);
function getNow() public constant returns (uint);
function transferByOwner(address to, uint _value, uint timevault) public returns (bool);
}
contract SPFCTokenType {
uint public decimals;
uint public totalSupply;
mapping(address => uint) balances;
mapping(address => uint) timevault;
mapping(address => mapping(address => uint)) allowed;
bool public released;
uint public globalTimeVault;
event Transfer(address indexed from, address indexed to, uint tokens);
}
contract ERC20Token is ERC20Interface, ERC223Interface, SPFCTokenType {
using SafeMath for uint;
function transfer(address _to, uint _value) public returns (bool success) {
bytes memory empty;
return transfer(_to, _value, empty);
}
function transfer(address _to, uint _value, bytes _data) public returns (bool success) {
if (isContract(_to)) {
return transferToContract(_to, _value, _data, false);
}
else {
return transferToAddress(_to, _value, false);
}
}
function approve(address _spender, uint _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) public constant returns (uint remaining) {
return allowed[_owner][_spender];
}
function balanceOf(address _owner) public constant returns (uint balance) {
return balances[_owner];
}
function isContract(address _addr) private view returns (bool is_contract) {
uint length;
assembly
{
length := extcodesize(_addr)
}
return (length > 0);
}
function transferToAddress(address _to, uint _value, bool withAllowance) private returns (bool success) {
transferIfRequirementsMet(msg.sender, _to, _value, withAllowance);
emit Transfer(msg.sender, _to, _value);
return true;
}
function transferToContract(address _to, uint _value, bytes _data, bool withAllowance) private returns (bool success) {
transferIfRequirementsMet(msg.sender, _to, _value, withAllowance);
ContractReceiver receiver = ContractReceiver(_to);
receiver.tokenFallback(msg.sender, _value, _data);
emit Transfer(msg.sender, _to, _value, _data);
return true;
}
function checkTransferRequirements(address _to, uint _value) private view {
require(_to != address(0));
require(released == true);
require(now > globalTimeVault);
if (timevault[msg.sender] != 0)
{
require(now > timevault[msg.sender]);
}
require(balanceOf(msg.sender) >= _value);
}
function transferIfRequirementsMet(address _from, address _to, uint _value, bool withAllowances) private {
checkTransferRequirements(_to, _value);
if ( withAllowances)
{
require (_value <= allowed[_from][msg.sender]);
}
balances[_from] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
}
function transferFrom(address from, address to, uint value) public returns (bool) {
bytes memory empty;
if (isContract(to)) {
return transferToContract(to, value, empty, true);
}
else {
return transferToAddress(to, value, true);
}
allowed[from][msg.sender] = allowed[from][msg.sender].sub(value);
return true;
}
}
contract TimeVaultToken is owned, TimeVaultInterface, ERC20Token {
function transferByOwner(address to, uint value, uint earliestReTransferTime) onlyOwner public returns (bool) {
transfer(to, value);
timevault[to] = earliestReTransferTime;
return true;
}
function timeVault(address owner) public constant returns (uint earliestTransferTime) {
return timevault[owner];
}
function getNow() public constant returns (uint blockchainTimeNow) {
return now;
}
}
contract StandardToken is TimeVaultToken {
function increaseApproval(address _spender, uint _addedValue) public returns (bool success) {
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, uint _subtractedValue) public returns (bool success) {
uint 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;
}
}
contract StandardTokenExt is StandardToken {
function isToken() public pure returns (bool weAre) {
return true;
}
}
contract OwnershipTransferrable is TimeVaultToken {
event OwnershipTransferred(address indexed _from, address indexed _to);
function transferOwnership(address newOwner) onlyOwner public {
transferByOwner(newOwner, balanceOf(owner), 0);
owner = newOwner;
emit OwnershipTransferred(msg.sender, newOwner);
}
}
contract VersionedToken is owned {
address public upgradableContractAddress;
constructor(address initialImplementation) public {
upgradableContractAddress = initialImplementation;
}
function upgradeToken(address newImplementation) onlyOwner public {
upgradableContractAddress = newImplementation;
}
function() public {
address upgradableContractMem = upgradableContractAddress;
bytes memory functionCall = msg.data;
assembly {
let functionCallSize := mload(functionCall)
let functionCallDataAddress := add(functionCall, 0x20)
let functionCallResult := delegatecall(gas, upgradableContractMem, functionCallDataAddress, functionCallSize, 0, 0)
let freeMemAddress := mload(0x40)
switch functionCallResult
case 0 {
revert(freeMemAddress, 0)
}
default {
returndatacopy(freeMemAddress, 0x0, returndatasize)
return (freeMemAddress, returndatasize)
}
}
}
}
contract SPFCToken is VersionedToken, SPFCTokenType {
string public name;
string public symbol;
constructor(address _tokenOwner, string _tokenName, string _tokenSymbol, uint _totalSupply, uint _decimals, uint _globalTimeVaultOpeningTime, address _initialImplementation) VersionedToken(_initialImplementation) public {
name = _tokenName;
symbol = _tokenSymbol;
decimals = _decimals;
totalSupply = _totalSupply * 10 ** uint(decimals);
balances[_tokenOwner] = totalSupply;
emit Transfer(address(0), owner, totalSupply);
globalTimeVault = _globalTimeVaultOpeningTime;
released = false;
}
}
contract SPFCTokenImpl is StandardTokenExt {
event UpdatedTokenInformation(string newName, string newSymbol);
string public name;
string public symbol;
function releaseTokenTransfer(bool _value) onlyOwner public {
released = _value;
}
function setGlobalTimeVault(uint _globalTimeVaultOpeningTime) onlyOwner public {
globalTimeVault = _globalTimeVaultOpeningTime;
}
function setTokenInformation(string _tokenName, string _tokenSymbol) onlyOwner public {
name = _tokenName;
symbol = _tokenSymbol;
emit UpdatedTokenInformation(name, symbol);
}
} |