ERC-20
Prediction Market
Overview
Max Total Supply
55,026,628.963156977480655168 STX
Holders
18,912 (0.00%)
Total Transfers
-
Market
Price
$0.00 @ 0.000002 ETH (-4.23%)
Onchain Market Cap
$236,678.89
Circulating Supply Market Cap
$222,079.00
Other Info
Token Contract (WITH 18 Decimals)
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
StoxSmartToken
Compiler Version
v0.4.11+commit.68ef5810
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity)
/** *Submitted for verification at Etherscan.io on 2017-08-01 */ pragma solidity ^0.4.11; /* Owned contract interface */ contract IOwned { // this function isn't abstract since the compiler emits automatically generated getter functions as external function owner() public constant returns (address owner) { owner; } function transferOwnership(address _newOwner) public; function acceptOwnership() public; } /* ERC20 Standard Token interface */ contract IERC20Token { // these functions aren't abstract since the compiler emits automatically generated getter functions as external function name() public constant returns (string name) { name; } function symbol() public constant returns (string symbol) { symbol; } function decimals() public constant returns (uint8 decimals) { decimals; } function totalSupply() public constant returns (uint256 totalSupply) { totalSupply; } function balanceOf(address _owner) public constant returns (uint256 balance) { _owner; balance; } function allowance(address _owner, address _spender) public constant returns (uint256 remaining) { _owner; _spender; remaining; } function transfer(address _to, uint256 _value) public returns (bool success); function transferFrom(address _from, address _to, uint256 _value) public returns (bool success); function approve(address _spender, uint256 _value) public returns (bool success); } /* Token Holder interface */ contract ITokenHolder is IOwned { function withdrawTokens(IERC20Token _token, address _to, uint256 _amount) public; } /* Smart Token interface */ contract ISmartToken is ITokenHolder, IERC20Token { function disableTransfers(bool _disable) public; function issue(address _to, uint256 _amount) public; function destroy(address _from, uint256 _amount) public; } /* Overflow protected math functions */ contract SafeMath { /** constructor */ function SafeMath() { } /** @dev returns the sum of _x and _y, asserts if the calculation overflows @param _x value 1 @param _y value 2 @return sum */ function safeAdd(uint256 _x, uint256 _y) internal returns (uint256) { uint256 z = _x + _y; assert(z >= _x); return z; } /** @dev returns the difference of _x minus _y, asserts if the subtraction results in a negative number @param _x minuend @param _y subtrahend @return difference */ function safeSub(uint256 _x, uint256 _y) internal returns (uint256) { assert(_x >= _y); return _x - _y; } /** @dev returns the product of multiplying _x by _y, asserts if the calculation overflows @param _x factor 1 @param _y factor 2 @return product */ function safeMul(uint256 _x, uint256 _y) internal returns (uint256) { uint256 z = _x * _y; assert(_x == 0 || z / _x == _y); return z; } } /** ERC20 Standard Token implementation */ contract ERC20Token is IERC20Token, SafeMath { string public standard = 'Token 0.1'; string public name = ''; string public symbol = ''; uint8 public decimals = 0; uint256 public totalSupply = 0; mapping (address => uint256) public balanceOf; mapping (address => mapping (address => uint256)) public allowance; event Transfer(address indexed _from, address indexed _to, uint256 _value); event Approval(address indexed _owner, address indexed _spender, uint256 _value); /** @dev constructor @param _name token name @param _symbol token symbol @param _decimals decimal points, for display purposes */ function ERC20Token(string _name, string _symbol, uint8 _decimals) { require(bytes(_name).length > 0 && bytes(_symbol).length > 0); // validate input name = _name; symbol = _symbol; decimals = _decimals; } // validates an address - currently only checks that it isn't null modifier validAddress(address _address) { require(_address != 0x0); _; } /** @dev send coins throws on any error rather then return a false flag to minimize user errors @param _to target address @param _value transfer amount @return true if the transfer was successful, false if it wasn't */ function transfer(address _to, uint256 _value) public validAddress(_to) returns (bool success) { balanceOf[msg.sender] = safeSub(balanceOf[msg.sender], _value); balanceOf[_to] = safeAdd(balanceOf[_to], _value); Transfer(msg.sender, _to, _value); return true; } /** @dev an account/contract attempts to get the coins throws on any error rather then return a false flag to minimize user errors @param _from source address @param _to target address @param _value transfer amount @return true if the transfer was successful, false if it wasn't */ function transferFrom(address _from, address _to, uint256 _value) public validAddress(_from) validAddress(_to) returns (bool success) { allowance[_from][msg.sender] = safeSub(allowance[_from][msg.sender], _value); balanceOf[_from] = safeSub(balanceOf[_from], _value); balanceOf[_to] = safeAdd(balanceOf[_to], _value); Transfer(_from, _to, _value); return true; } /** @dev allow another account/contract to spend some tokens on your behalf throws on any error rather then return a false flag to minimize user errors also, to minimize the risk of the approve/transferFrom attack vector (see https://docs.google.com/document/d/1YLPtQxZu1UAvO9cZ1O2RPXBbT0mooh4DYKjA_jp-RLM/), approve has to be called twice in 2 separate transactions - once to change the allowance to 0 and secondly to change it to the new allowance value @param _spender approved address @param _value allowance amount @return true if the approval was successful, false if it wasn't */ function approve(address _spender, uint256 _value) public validAddress(_spender) returns (bool success) { // if the allowance isn't 0, it can only be updated to 0 to prevent an allowance change immediately after withdrawal require(_value == 0 || allowance[msg.sender][_spender] == 0); allowance[msg.sender][_spender] = _value; Approval(msg.sender, _spender, _value); return true; } } /* Provides support and utilities for contract ownership */ contract Owned is IOwned { address public owner; address public newOwner; event OwnerUpdate(address _prevOwner, address _newOwner); /** @dev constructor */ function Owned() { owner = msg.sender; } // allows execution by the owner only modifier ownerOnly { assert(msg.sender == owner); _; } /** @dev allows transferring the contract ownership the new owner still need to accept the transfer can only be called by the contract owner @param _newOwner new contract owner */ function transferOwnership(address _newOwner) public ownerOnly { require(_newOwner != owner); newOwner = _newOwner; } /** @dev used by a new owner to accept an ownership transfer */ function acceptOwnership() public { require(msg.sender == newOwner); OwnerUpdate(owner, newOwner); owner = newOwner; newOwner = 0x0; } } /* We consider every contract to be a 'token holder' since it's currently not possible for a contract to deny receiving tokens. The TokenHolder's contract sole purpose is to provide a safety mechanism that allows the owner to send tokens that were sent to the contract by mistake back to their sender. */ contract TokenHolder is ITokenHolder, Owned { /** @dev constructor */ function TokenHolder() { } // validates an address - currently only checks that it isn't null modifier validAddress(address _address) { require(_address != 0x0); _; } // verifies that the address is different than this contract address modifier notThis(address _address) { require(_address != address(this)); _; } /** @dev withdraws tokens held by the contract and sends them to an account can only be called by the owner @param _token ERC20 token contract address @param _to account to receive the new amount @param _amount amount to withdraw */ function withdrawTokens(IERC20Token _token, address _to, uint256 _amount) public ownerOnly validAddress(_token) validAddress(_to) notThis(_to) { assert(_token.transfer(_to, _amount)); } } /* Smart Token v0.2 'Owned' is specified here for readability reasons */ contract SmartToken is ISmartToken, ERC20Token, Owned, TokenHolder { string public version = '0.2'; bool public transfersEnabled = true; // true if transfer/transferFrom are enabled, false if not // triggered when a smart token is deployed - the _token address is defined for forward compatibility, in case we want to trigger the event from a factory event NewSmartToken(address _token); // triggered when the total supply is increased event Issuance(uint256 _amount); // triggered when the total supply is decreased event Destruction(uint256 _amount); /** @dev constructor @param _name token name @param _symbol token short symbol, 1-6 characters @param _decimals for display purposes only */ function SmartToken(string _name, string _symbol, uint8 _decimals) ERC20Token(_name, _symbol, _decimals) { require(bytes(_symbol).length <= 6); // validate input NewSmartToken(address(this)); } // allows execution only when transfers aren't disabled modifier transfersAllowed { assert(transfersEnabled); _; } /** @dev disables/enables transfers can only be called by the contract owner @param _disable true to disable transfers, false to enable them */ function disableTransfers(bool _disable) public ownerOnly { transfersEnabled = !_disable; } /** @dev increases the token supply and sends the new tokens to an account can only be called by the contract owner @param _to account to receive the new amount @param _amount amount to increase the supply by */ function issue(address _to, uint256 _amount) public ownerOnly validAddress(_to) notThis(_to) { totalSupply = safeAdd(totalSupply, _amount); balanceOf[_to] = safeAdd(balanceOf[_to], _amount); Issuance(_amount); Transfer(this, _to, _amount); } /** @dev removes tokens from an account and decreases the token supply can only be called by the contract owner @param _from account to remove the amount from @param _amount amount to decrease the supply by */ function destroy(address _from, uint256 _amount) public ownerOnly { balanceOf[_from] = safeSub(balanceOf[_from], _amount); totalSupply = safeSub(totalSupply, _amount); Transfer(_from, this, _amount); Destruction(_amount); } // ERC20 standard method overrides with some extra functionality /** @dev send coins throws on any error rather then return a false flag to minimize user errors note that when transferring to the smart token's address, the coins are actually destroyed @param _to target address @param _value transfer amount @return true if the transfer was successful, false if it wasn't */ function transfer(address _to, uint256 _value) public transfersAllowed returns (bool success) { assert(super.transfer(_to, _value)); // transferring to the contract address destroys tokens if (_to == address(this)) { balanceOf[_to] -= _value; totalSupply -= _value; Destruction(_value); } return true; } /** @dev an account/contract attempts to get the coins throws on any error rather then return a false flag to minimize user errors note that when transferring to the smart token's address, the coins are actually destroyed @param _from source address @param _to target address @param _value transfer amount @return true if the transfer was successful, false if it wasn't */ function transferFrom(address _from, address _to, uint256 _value) public transfersAllowed returns (bool success) { assert(super.transferFrom(_from, _to, _value)); // transferring to the contract address destroys tokens if (_to == address(this)) { balanceOf[_to] -= _value; totalSupply -= _value; Destruction(_value); } return true; } } /// @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; address public newOwnerCandidate; event OwnershipRequested(address indexed _by, address indexed _to); event OwnershipTransferred(address indexed _from, address indexed _to); /// @dev The Ownable constructor sets the original `owner` of the contract to the sender account. function Ownable() { owner = msg.sender; } /// @dev Throws if called by any account other than the owner. modifier onlyOwner() { if (msg.sender != owner) { throw; } _; } /// @dev Proposes to transfer control of the contract to a newOwnerCandidate. /// @param _newOwnerCandidate address The address to transfer ownership to. function transferOwnership(address _newOwnerCandidate) onlyOwner { require(_newOwnerCandidate != address(0)); newOwnerCandidate = _newOwnerCandidate; OwnershipRequested(msg.sender, newOwnerCandidate); } /// @dev Accept ownership transfer. This method needs to be called by the perviously proposed owner. function acceptOwnership() { if (msg.sender == newOwnerCandidate) { owner = newOwnerCandidate; newOwnerCandidate = address(0); OwnershipTransferred(owner, newOwnerCandidate); } } } /// @title Math operations with safety checks library SaferMath { function mul(uint256 a, uint256 b) internal returns (uint256) { uint256 c = a * b; assert(a == 0 || c / a == b); return c; } function div(uint256 a, uint256 b) internal 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 c; } function sub(uint256 a, uint256 b) internal returns (uint256) { assert(b <= a); return a - b; } function add(uint256 a, uint256 b) internal returns (uint256) { uint256 c = a + b; assert(c >= a); return c; } function max64(uint64 a, uint64 b) internal constant returns (uint64) { return a >= b ? a : b; } function min64(uint64 a, uint64 b) internal constant returns (uint64) { return a < b ? a : b; } function max256(uint256 a, uint256 b) internal constant returns (uint256) { return a >= b ? a : b; } function min256(uint256 a, uint256 b) internal constant returns (uint256) { return a < b ? a : b; } } /// @title Stox Smart Token contract StoxSmartToken is SmartToken { function StoxSmartToken() SmartToken('Stox', 'STX', 18) { disableTransfers(true); } } /// @title Vesting trustee contract Trustee is Ownable { using SaferMath for uint256; // The address of the STX ERC20 token. StoxSmartToken public stox; struct Grant { uint256 value; uint256 start; uint256 cliff; uint256 end; uint256 transferred; bool revokable; } // Grants holder. mapping (address => Grant) public grants; // Total tokens available for vesting. uint256 public totalVesting; event NewGrant(address indexed _from, address indexed _to, uint256 _value); event UnlockGrant(address indexed _holder, uint256 _value); event RevokeGrant(address indexed _holder, uint256 _refund); /// @dev Constructor that initializes the address of the StoxSmartToken contract. /// @param _stox StoxSmartToken The address of the previously deployed StoxSmartToken smart contract. function Trustee(StoxSmartToken _stox) { require(_stox != address(0)); stox = _stox; } /// @dev Grant tokens to a specified address. /// @param _to address The address to grant tokens to. /// @param _value uint256 The amount of tokens to be granted. /// @param _start uint256 The beginning of the vesting period. /// @param _cliff uint256 Duration of the cliff period. /// @param _end uint256 The end of the vesting period. /// @param _revokable bool Whether the grant is revokable or not. function grant(address _to, uint256 _value, uint256 _start, uint256 _cliff, uint256 _end, bool _revokable) public onlyOwner { require(_to != address(0)); require(_value > 0); // Make sure that a single address can be granted tokens only once. require(grants[_to].value == 0); // Check for date inconsistencies that may cause unexpected behavior. require(_start <= _cliff && _cliff <= _end); // Check that this grant doesn't exceed the total amount of tokens currently available for vesting. require(totalVesting.add(_value) <= stox.balanceOf(address(this))); // Assign a new grant. grants[_to] = Grant({ value: _value, start: _start, cliff: _cliff, end: _end, transferred: 0, revokable: _revokable }); // Tokens granted, reduce the total amount available for vesting. totalVesting = totalVesting.add(_value); NewGrant(msg.sender, _to, _value); } /// @dev Revoke the grant of tokens of a specifed address. /// @param _holder The address which will have its tokens revoked. function revoke(address _holder) public onlyOwner { Grant grant = grants[_holder]; require(grant.revokable); // Send the remaining STX back to the owner. uint256 refund = grant.value.sub(grant.transferred); // Remove the grant. delete grants[_holder]; totalVesting = totalVesting.sub(refund); stox.transfer(msg.sender, refund); RevokeGrant(_holder, refund); } /// @dev Calculate the total amount of vested tokens of a holder at a given time. /// @param _holder address The address of the holder. /// @param _time uint256 The specific time. /// @return a uint256 representing a holder's total amount of vested tokens. function vestedTokens(address _holder, uint256 _time) public constant returns (uint256) { Grant grant = grants[_holder]; if (grant.value == 0) { return 0; } return calculateVestedTokens(grant, _time); } /// @dev Calculate amount of vested tokens at a specifc time. /// @param _grant Grant The vesting grant. /// @param _time uint256 The time to be checked /// @return An uint256 representing the amount of vested tokens of a specific grant. /// | _/-------- vestedTokens rect /// | _/ /// | _/ /// | _/ /// | _/ /// | / /// | .| /// | . | /// | . | /// | . | /// | . | /// | . | /// +===+===========+---------+----------> time /// Start Cliff End function calculateVestedTokens(Grant _grant, uint256 _time) private constant returns (uint256) { // If we're before the cliff, then nothing is vested. if (_time < _grant.cliff) { return 0; } // If we're after the end of the vesting period - everything is vested; if (_time >= _grant.end) { return _grant.value; } // Interpolate all vested tokens: vestedTokens = tokens/// (time - start) / (end - start) return _grant.value.mul(_time.sub(_grant.start)).div(_grant.end.sub(_grant.start)); } /// @dev Unlock vested tokens and transfer them to their holder. /// @return a uint256 representing the amount of vested tokens transferred to their holder. function unlockVestedTokens() public { Grant grant = grants[msg.sender]; require(grant.value != 0); // Get the total amount of vested tokens, acccording to grant. uint256 vested = calculateVestedTokens(grant, now); if (vested == 0) { return; } // Make sure the holder doesn't transfer more than what he already has. uint256 transferable = vested.sub(grant.transferred); if (transferable == 0) { return; } grant.transferred = grant.transferred.add(transferable); totalVesting = totalVesting.sub(transferable); stox.transfer(msg.sender, transferable); UnlockGrant(msg.sender, transferable); } } /// @title Stox Smart Token sale contract StoxSmartTokenSale is Ownable { using SaferMath for uint256; uint256 public constant DURATION = 14 days; bool public isFinalized = false; bool public isDistributed = false; // The address of the STX ERC20 token. StoxSmartToken public stox; // The address of the token allocation trustee; Trustee public trustee; uint256 public startTime = 0; uint256 public endTime = 0; address public fundingRecipient; uint256 public tokensSold = 0; // TODO: update to the correct values. uint256 public constant ETH_CAP = 148000; uint256 public constant EXCHANGE_RATE = 200; // 200 STX for ETH uint256 public constant TOKEN_SALE_CAP = ETH_CAP * EXCHANGE_RATE * 10 ** 18; event TokensIssued(address indexed _to, uint256 _tokens); /// @dev Throws if called when not during sale. modifier onlyDuringSale() { if (tokensSold >= TOKEN_SALE_CAP || now < startTime || now >= endTime) { throw; } _; } /// @dev Throws if called before sale ends. modifier onlyAfterSale() { if (!(tokensSold >= TOKEN_SALE_CAP || now >= endTime)) { throw; } _; } /// @dev Constructor that initializes the sale conditions. /// @param _fundingRecipient address The address of the funding recipient. /// @param _startTime uint256 The start time of the token sale. function StoxSmartTokenSale(address _stox, address _fundingRecipient, uint256 _startTime) { require(_stox != address(0)); require(_fundingRecipient != address(0)); require(_startTime > now); stox = StoxSmartToken(_stox); fundingRecipient = _fundingRecipient; startTime = _startTime; endTime = startTime + DURATION; } /// @dev Distributed tokens to the partners who have participated during the pre-sale. function distributePartnerTokens() external onlyOwner { require(!isDistributed); assert(tokensSold == 0); assert(stox.totalSupply() == 0); // Distribute strategic tokens to partners. Please note, that this address doesn't represent a single entity or // person and will be only used to distribute tokens to 30~ partners. // // Please expect to see token transfers from this address in the first 24 hours after the token sale ends. issueTokens(0x9065260ef6830f6372F1Bde408DeC57Fe3150530, 14800000 * 10 ** 18); isDistributed = true; } /// @dev Finalizes the token sale event. function finalize() external onlyAfterSale { if (isFinalized) { throw; } // Grant vesting grants. // // TODO: use real addresses. trustee = new Trustee(stox); // Since only 50% of the tokens will be sold, we will automatically issue the same amount of sold STX to the // trustee. uint256 unsoldTokens = tokensSold; // Issue 55% of the remaining tokens (== 27.5%) go to strategic parternships. uint256 strategicPartnershipTokens = unsoldTokens.mul(55).div(100); // Note: we will substract the bonus tokens from this grant, since they were already issued for the pre-sale // strategic partners and should've been taken from this allocation. stox.issue(0xbC14105ccDdeAadB96Ba8dCE18b40C45b6bACf58, strategicPartnershipTokens); // Issue the remaining tokens as vesting grants: stox.issue(trustee, unsoldTokens.sub(strategicPartnershipTokens)); // 25% of the remaining tokens (== 12.5%) go to Invest.com, at uniform 12 months vesting schedule. trustee.grant(0xb54c6a870d4aD65e23d471Fb7941aD271D323f5E, unsoldTokens.mul(25).div(100), now, now, now.add(1 years), true); // 20% of the remaining tokens (== 10%) go to Stox team, at uniform 24 months vesting schedule. trustee.grant(0x4eB4Cd1D125d9d281709Ff38d65b99a6927b46c1, unsoldTokens.mul(20).div(100), now, now, now.add(2 years), true); // Re-enable transfers after the token sale. stox.disableTransfers(false); isFinalized = true; } /// @dev Create and sell tokens to the caller. /// @param _recipient address The address of the recipient. function create(address _recipient) public payable onlyDuringSale { require(_recipient != address(0)); require(msg.value > 0); assert(isDistributed); uint256 tokens = SaferMath.min256(msg.value.mul(EXCHANGE_RATE), TOKEN_SALE_CAP.sub(tokensSold)); uint256 contribution = tokens.div(EXCHANGE_RATE); issueTokens(_recipient, tokens); // Transfer the funds to the funding recipient. fundingRecipient.transfer(contribution); // Refund the msg.sender, in the case that not all of its ETH was used. This can happen only when selling the // last chunk of STX. uint256 refund = msg.value.sub(contribution); if (refund > 0) { msg.sender.transfer(refund); } } /// @dev Issues tokens for the recipient. /// @param _recipient address The address of the recipient. /// @param _tokens uint256 The amount of tokens to issue. function issueTokens(address _recipient, uint256 _tokens) private { // Update total sold tokens. tokensSold = tokensSold.add(_tokens); stox.issue(_recipient, _tokens); TokensIssued(_recipient, _tokens); } /// @dev Fallback function that will delegate the request to create. function () external payable onlyDuringSale { create(msg.sender); } /// @dev Proposes to transfer control of the StoxSmartToken contract to a new owner. /// @param _newOwnerCandidate address The address to transfer ownership to. /// /// Note that: /// 1. The new owner will need to call StoxSmartToken's acceptOwnership directly in order to accept the ownership. /// 2. Calling this method during the token sale will prevent the token sale to continue, since only the owner of /// the StoxSmartToken contract can issue new tokens. function transferSmartTokenOwnership(address _newOwnerCandidate) external onlyOwner { stox.transferOwnership(_newOwnerCandidate); } /// @dev Accepts new ownership on behalf of the StoxSmartToken contract. This can be used, by the token sale /// contract itself to claim back ownership of the StoxSmartToken contract. function acceptSmartTokenOwnership() external onlyOwner { stox.acceptOwnership(); } /// @dev Proposes to transfer control of the Trustee contract to a new owner. /// @param _newOwnerCandidate address The address to transfer ownership to. /// /// Note that: /// 1. The new owner will need to call Trustee's acceptOwnership directly in order to accept the ownership. /// 2. Calling this method during the token sale won't be possible, as the Trustee is only created after its /// finalization. function transferTrusteeOwnership(address _newOwnerCandidate) external onlyOwner { trustee.transferOwnership(_newOwnerCandidate); } /// @dev Accepts new ownership on behalf of the Trustee contract. This can be used, by the token sale /// contract itself to claim back ownership of the Trustee contract. function acceptTrusteeOwnership() external onlyOwner { trustee.acceptOwnership(); } }
Contract Security Audit
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Contract Creation Code
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Deployed Bytecode
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Swarm Source
bzzr://7005dfc56dca66631199f0571f344e340c32495dc02b7aa85d189a081bc3d609
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