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Contract

0x08CeE0ab11fe46E29C539509F25BcBDA2F70e2bF
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Contract Source Code Verified (Exact Match)

Contract Name:
BTTSLib
Compiler Version
v0.4.19+commit.c4cbbb05
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion

Contract Source Code (Solidity)

blockscan-logoblockscan-logoIDE
/**
 *Submitted for verification at Etherscan.io on 2018-02-11
*/

pragma solidity ^0.4.18;

// ----------------------------------------------------------------------------
// BokkyPooBah's Token Teleportation Service v1.10
//
// https://github.com/bokkypoobah/BokkyPooBahsTokenTeleportationServiceSmartContract
//
// Enjoy. (c) BokkyPooBah / Bok Consulting Pty Ltd 2018. The MIT Licence.
// ----------------------------------------------------------------------------


// ----------------------------------------------------------------------------
// ERC Token Standard #20 Interface
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md
// ----------------------------------------------------------------------------
contract ERC20Interface {
    function totalSupply() public view returns (uint);
    function balanceOf(address tokenOwner) public view returns (uint balance);
    function allowance(address tokenOwner, address spender) public view 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, uint tokens) public returns (bool success);

    event Transfer(address indexed from, address indexed to, uint tokens);
    event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}


// ----------------------------------------------------------------------------
// Contracts that can have tokens approved, and then a function executed
// ----------------------------------------------------------------------------
contract ApproveAndCallFallBack {
    function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
}


// ----------------------------------------------------------------------------
// BokkyPooBah's Token Teleportation Service Interface v1.10
//
// Enjoy. (c) BokkyPooBah / Bok Consulting Pty Ltd 2018. The MIT Licence.
// ----------------------------------------------------------------------------
contract BTTSTokenInterface is ERC20Interface {
    uint public constant bttsVersion = 110;

    bytes public constant signingPrefix = "\x19Ethereum Signed Message:\n32";
    bytes4 public constant signedTransferSig = "\x75\x32\xea\xac";
    bytes4 public constant signedApproveSig = "\xe9\xaf\xa7\xa1";
    bytes4 public constant signedTransferFromSig = "\x34\x4b\xcc\x7d";
    bytes4 public constant signedApproveAndCallSig = "\xf1\x6f\x9b\x53";

    event OwnershipTransferred(address indexed from, address indexed to);
    event MinterUpdated(address from, address to);
    event Mint(address indexed tokenOwner, uint tokens, bool lockAccount);
    event MintingDisabled();
    event TransfersEnabled();
    event AccountUnlocked(address indexed tokenOwner);

    function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success);

    // ------------------------------------------------------------------------
    // signed{X} functions
    // ------------------------------------------------------------------------
    function signedTransferHash(address tokenOwner, address to, uint tokens, uint fee, uint nonce) public view returns (bytes32 hash);
    function signedTransferCheck(address tokenOwner, address to, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public view returns (CheckResult result);
    function signedTransfer(address tokenOwner, address to, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public returns (bool success);

    function signedApproveHash(address tokenOwner, address spender, uint tokens, uint fee, uint nonce) public view returns (bytes32 hash);
    function signedApproveCheck(address tokenOwner, address spender, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public view returns (CheckResult result);
    function signedApprove(address tokenOwner, address spender, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public returns (bool success);

    function signedTransferFromHash(address spender, address from, address to, uint tokens, uint fee, uint nonce) public view returns (bytes32 hash);
    function signedTransferFromCheck(address spender, address from, address to, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public view returns (CheckResult result);
    function signedTransferFrom(address spender, address from, address to, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public returns (bool success);

    function signedApproveAndCallHash(address tokenOwner, address spender, uint tokens, bytes _data, uint fee, uint nonce) public view returns (bytes32 hash);
    function signedApproveAndCallCheck(address tokenOwner, address spender, uint tokens, bytes _data, uint fee, uint nonce, bytes sig, address feeAccount) public view returns (CheckResult result);
    function signedApproveAndCall(address tokenOwner, address spender, uint tokens, bytes _data, uint fee, uint nonce, bytes sig, address feeAccount) public returns (bool success);

    function mint(address tokenOwner, uint tokens, bool lockAccount) public returns (bool success);
    function unlockAccount(address tokenOwner) public;
    function disableMinting() public;
    function enableTransfers() public;

    // ------------------------------------------------------------------------
    // signed{X}Check return status
    // ------------------------------------------------------------------------
    enum CheckResult {
        Success,                           // 0 Success
        NotTransferable,                   // 1 Tokens not transferable yet
        AccountLocked,                     // 2 Account locked
        SignerMismatch,                    // 3 Mismatch in signing account
        InvalidNonce,                      // 4 Invalid nonce
        InsufficientApprovedTokens,        // 5 Insufficient approved tokens
        InsufficientApprovedTokensForFees, // 6 Insufficient approved tokens for fees
        InsufficientTokens,                // 7 Insufficient tokens
        InsufficientTokensForFees,         // 8 Insufficient tokens for fees
        OverflowError                      // 9 Overflow error
    }
}


// ----------------------------------------------------------------------------
// BokkyPooBah's Token Teleportation Service Library v1.00
//
// Enjoy. (c) BokkyPooBah / Bok Consulting Pty Ltd 2018. The MIT Licence.
// ----------------------------------------------------------------------------
library BTTSLib {
    struct Data {
        bool initialised;

        // Ownership
        address owner;
        address newOwner;

        // Minting and management
        address minter;
        bool mintable;
        bool transferable;
        mapping(address => bool) accountLocked;

        // Token
        string symbol;
        string name;
        uint8 decimals;
        uint totalSupply;
        mapping(address => uint) balances;
        mapping(address => mapping(address => uint)) allowed;
        mapping(address => uint) nextNonce;
    }


    // ------------------------------------------------------------------------
    // Constants
    // ------------------------------------------------------------------------
    uint public constant bttsVersion = 110;
    bytes public constant signingPrefix = "\x19Ethereum Signed Message:\n32";
    bytes4 public constant signedTransferSig = "\x75\x32\xea\xac";
    bytes4 public constant signedApproveSig = "\xe9\xaf\xa7\xa1";
    bytes4 public constant signedTransferFromSig = "\x34\x4b\xcc\x7d";
    bytes4 public constant signedApproveAndCallSig = "\xf1\x6f\x9b\x53";

    // ------------------------------------------------------------------------
    // Event
    // ------------------------------------------------------------------------
    event OwnershipTransferred(address indexed from, address indexed to);
    event MinterUpdated(address from, address to);
    event Mint(address indexed tokenOwner, uint tokens, bool lockAccount);
    event MintingDisabled();
    event TransfersEnabled();
    event AccountUnlocked(address indexed tokenOwner);
    event Transfer(address indexed from, address indexed to, uint tokens);
    event Approval(address indexed tokenOwner, address indexed spender, uint tokens);


    // ------------------------------------------------------------------------
    // Initialisation
    // ------------------------------------------------------------------------
    function init(Data storage self, address owner, string symbol, string name, uint8 decimals, uint initialSupply, bool mintable, bool transferable) public {
        require(!self.initialised);
        self.initialised = true;
        self.owner = owner;
        self.symbol = symbol;
        self.name = name;
        self.decimals = decimals;
        if (initialSupply > 0) {
            self.balances[owner] = initialSupply;
            self.totalSupply = initialSupply;
            Mint(self.owner, initialSupply, false);
            Transfer(address(0), self.owner, initialSupply);
        }
        self.mintable = mintable;
        self.transferable = transferable;
    }

    // ------------------------------------------------------------------------
    // Safe maths, inspired by OpenZeppelin
    // ------------------------------------------------------------------------
    function safeAdd(uint a, uint b) internal pure returns (uint c) {
        c = a + b;
        require(c >= a);
    }
    function safeSub(uint a, uint b) internal pure returns (uint c) {
        require(b <= a);
        c = a - b;
    }
    function safeMul(uint a, uint b) internal pure returns (uint c) {
        c = a * b;
        require(a == 0 || c / a == b);
    }
    function safeDiv(uint a, uint b) internal pure returns (uint c) {
        require(b > 0);
        c = a / b;
    }

    // ------------------------------------------------------------------------
    // Ownership
    // ------------------------------------------------------------------------
    function transferOwnership(Data storage self, address newOwner) public {
        require(msg.sender == self.owner);
        self.newOwner = newOwner;
    }
    function acceptOwnership(Data storage self) public {
        require(msg.sender == self.newOwner);
        OwnershipTransferred(self.owner, self.newOwner);
        self.owner = self.newOwner;
        self.newOwner = address(0);
    }
    function transferOwnershipImmediately(Data storage self, address newOwner) public {
        require(msg.sender == self.owner);
        OwnershipTransferred(self.owner, newOwner);
        self.owner = newOwner;
        self.newOwner = address(0);
    }

    // ------------------------------------------------------------------------
    // Minting and management
    // ------------------------------------------------------------------------
    function setMinter(Data storage self, address minter) public {
        require(msg.sender == self.owner);
        require(self.mintable);
        MinterUpdated(self.minter, minter);
        self.minter = minter;
    }
    function mint(Data storage self, address tokenOwner, uint tokens, bool lockAccount) public returns (bool success) {
        require(self.mintable);
        require(msg.sender == self.minter || msg.sender == self.owner);
        if (lockAccount) {
            self.accountLocked[tokenOwner] = true;
        }
        self.balances[tokenOwner] = safeAdd(self.balances[tokenOwner], tokens);
        self.totalSupply = safeAdd(self.totalSupply, tokens);
        Mint(tokenOwner, tokens, lockAccount);
        Transfer(address(0), tokenOwner, tokens);
        return true;
    }
    function unlockAccount(Data storage self, address tokenOwner) public {
        require(msg.sender == self.owner);
        require(self.accountLocked[tokenOwner]);
        self.accountLocked[tokenOwner] = false;
        AccountUnlocked(tokenOwner);
    }
    function disableMinting(Data storage self) public {
        require(self.mintable);
        require(msg.sender == self.minter || msg.sender == self.owner);
        self.mintable = false;
        if (self.minter != address(0)) {
            MinterUpdated(self.minter, address(0));
            self.minter = address(0);
        }
        MintingDisabled();
    }
    function enableTransfers(Data storage self) public {
        require(msg.sender == self.owner);
        require(!self.transferable);
        self.transferable = true;
        TransfersEnabled();
    }

    // ------------------------------------------------------------------------
    // Other functions
    // ------------------------------------------------------------------------
    function transferAnyERC20Token(Data storage self, address tokenAddress, uint tokens) public returns (bool success) {
        require(msg.sender == self.owner);
        return ERC20Interface(tokenAddress).transfer(self.owner, tokens);
    }

    // ------------------------------------------------------------------------
    // ecrecover from a signature rather than the signature in parts [v, r, s]
    // The signature format is a compact form {bytes32 r}{bytes32 s}{uint8 v}.
    // Compact means, uint8 is not padded to 32 bytes.
    //
    // An invalid signature results in the address(0) being returned, make
    // sure that the returned result is checked to be non-zero for validity
    //
    // Parts from https://gist.github.com/axic/5b33912c6f61ae6fd96d6c4a47afde6d
    // ------------------------------------------------------------------------
    function ecrecoverFromSig(bytes32 hash, bytes sig) public pure returns (address recoveredAddress) {
        bytes32 r;
        bytes32 s;
        uint8 v;
        if (sig.length != 65) return address(0);
        assembly {
            r := mload(add(sig, 32))
            s := mload(add(sig, 64))
            // Here we are loading the last 32 bytes. We exploit the fact that 'mload' will pad with zeroes if we overread.
            // There is no 'mload8' to do this, but that would be nicer.
            v := byte(0, mload(add(sig, 96)))
        }
        // Albeit non-transactional signatures are not specified by the YP, one would expect it to match the YP range of [27, 28]
        // geth uses [0, 1] and some clients have followed. This might change, see https://github.com/ethereum/go-ethereum/issues/2053
        if (v < 27) {
          v += 27;
        }
        if (v != 27 && v != 28) return address(0);
        return ecrecover(hash, v, r, s);
    }

    // ------------------------------------------------------------------------
    // Get CheckResult message
    // ------------------------------------------------------------------------
    function getCheckResultMessage(Data storage /*self*/, BTTSTokenInterface.CheckResult result) public pure returns (string) {
        if (result == BTTSTokenInterface.CheckResult.Success) {
            return "Success";
        } else if (result == BTTSTokenInterface.CheckResult.NotTransferable) {
            return "Tokens not transferable yet";
        } else if (result == BTTSTokenInterface.CheckResult.AccountLocked) {
            return "Account locked";
        } else if (result == BTTSTokenInterface.CheckResult.SignerMismatch) {
            return "Mismatch in signing account";
        } else if (result == BTTSTokenInterface.CheckResult.InvalidNonce) {
            return "Invalid nonce";
        } else if (result == BTTSTokenInterface.CheckResult.InsufficientApprovedTokens) {
            return "Insufficient approved tokens";
        } else if (result == BTTSTokenInterface.CheckResult.InsufficientApprovedTokensForFees) {
            return "Insufficient approved tokens for fees";
        } else if (result == BTTSTokenInterface.CheckResult.InsufficientTokens) {
            return "Insufficient tokens";
        } else if (result == BTTSTokenInterface.CheckResult.InsufficientTokensForFees) {
            return "Insufficient tokens for fees";
        } else if (result == BTTSTokenInterface.CheckResult.OverflowError) {
            return "Overflow error";
        } else {
            return "Unknown error";
        }
    }

    // ------------------------------------------------------------------------
    // Token functions
    // ------------------------------------------------------------------------
    function transfer(Data storage self, address to, uint tokens) public returns (bool success) {
        // Owner and minter can move tokens before the tokens are transferable
        require(self.transferable || (self.mintable && (msg.sender == self.owner  || msg.sender == self.minter)));
        require(!self.accountLocked[msg.sender]);
        self.balances[msg.sender] = safeSub(self.balances[msg.sender], tokens);
        self.balances[to] = safeAdd(self.balances[to], tokens);
        Transfer(msg.sender, to, tokens);
        return true;
    }
    function approve(Data storage self, address spender, uint tokens) public returns (bool success) {
        require(!self.accountLocked[msg.sender]);
        self.allowed[msg.sender][spender] = tokens;
        Approval(msg.sender, spender, tokens);
        return true;
    }
    function transferFrom(Data storage self, address from, address to, uint tokens) public returns (bool success) {
        require(self.transferable);
        require(!self.accountLocked[from]);
        self.balances[from] = safeSub(self.balances[from], tokens);
        self.allowed[from][msg.sender] = safeSub(self.allowed[from][msg.sender], tokens);
        self.balances[to] = safeAdd(self.balances[to], tokens);
        Transfer(from, to, tokens);
        return true;
    }
    function approveAndCall(Data storage self, address spender, uint tokens, bytes data) public returns (bool success) {
        require(!self.accountLocked[msg.sender]);
        self.allowed[msg.sender][spender] = tokens;
        Approval(msg.sender, spender, tokens);
        ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, address(this), data);
        return true;
    }

    // ------------------------------------------------------------------------
    // Signed function
    // ------------------------------------------------------------------------
    function signedTransferHash(Data storage /*self*/, address tokenOwner, address to, uint tokens, uint fee, uint nonce) public view returns (bytes32 hash) {
        hash = keccak256(signedTransferSig, address(this), tokenOwner, to, tokens, fee, nonce);
    }
    function signedTransferCheck(Data storage self, address tokenOwner, address to, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public view returns (BTTSTokenInterface.CheckResult result) {
        if (!self.transferable) return BTTSTokenInterface.CheckResult.NotTransferable;
        bytes32 hash = signedTransferHash(self, tokenOwner, to, tokens, fee, nonce);
        if (tokenOwner == address(0) || tokenOwner != ecrecoverFromSig(keccak256(signingPrefix, hash), sig)) return BTTSTokenInterface.CheckResult.SignerMismatch;
        if (self.accountLocked[tokenOwner]) return BTTSTokenInterface.CheckResult.AccountLocked;
        if (self.nextNonce[tokenOwner] != nonce) return BTTSTokenInterface.CheckResult.InvalidNonce;
        uint total = safeAdd(tokens, fee);
        if (self.balances[tokenOwner] < tokens) return BTTSTokenInterface.CheckResult.InsufficientTokens;
        if (self.balances[tokenOwner] < total) return BTTSTokenInterface.CheckResult.InsufficientTokensForFees;
        if (self.balances[to] + tokens < self.balances[to]) return BTTSTokenInterface.CheckResult.OverflowError;
        if (self.balances[feeAccount] + fee < self.balances[feeAccount]) return BTTSTokenInterface.CheckResult.OverflowError;
        return BTTSTokenInterface.CheckResult.Success;
    }
    function signedTransfer(Data storage self, address tokenOwner, address to, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public returns (bool success) {
        require(self.transferable);
        bytes32 hash = signedTransferHash(self, tokenOwner, to, tokens, fee, nonce);
        require(tokenOwner != address(0) && tokenOwner == ecrecoverFromSig(keccak256(signingPrefix, hash), sig));
        require(!self.accountLocked[tokenOwner]);
        require(self.nextNonce[tokenOwner] == nonce);
        self.nextNonce[tokenOwner] = nonce + 1;
        self.balances[tokenOwner] = safeSub(self.balances[tokenOwner], tokens);
        self.balances[to] = safeAdd(self.balances[to], tokens);
        Transfer(tokenOwner, to, tokens);
        self.balances[tokenOwner] = safeSub(self.balances[tokenOwner], fee);
        self.balances[feeAccount] = safeAdd(self.balances[feeAccount], fee);
        Transfer(tokenOwner, feeAccount, fee);
        return true;
    }
    function signedApproveHash(Data storage /*self*/, address tokenOwner, address spender, uint tokens, uint fee, uint nonce) public view returns (bytes32 hash) {
        hash = keccak256(signedApproveSig, address(this), tokenOwner, spender, tokens, fee, nonce);
    }
    function signedApproveCheck(Data storage self, address tokenOwner, address spender, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public view returns (BTTSTokenInterface.CheckResult result) {
        if (!self.transferable) return BTTSTokenInterface.CheckResult.NotTransferable;
        bytes32 hash = signedApproveHash(self, tokenOwner, spender, tokens, fee, nonce);
        if (tokenOwner == address(0) || tokenOwner != ecrecoverFromSig(keccak256(signingPrefix, hash), sig)) return BTTSTokenInterface.CheckResult.SignerMismatch;
        if (self.accountLocked[tokenOwner]) return BTTSTokenInterface.CheckResult.AccountLocked;
        if (self.nextNonce[tokenOwner] != nonce) return BTTSTokenInterface.CheckResult.InvalidNonce;
        if (self.balances[tokenOwner] < fee) return BTTSTokenInterface.CheckResult.InsufficientTokensForFees;
        if (self.balances[feeAccount] + fee < self.balances[feeAccount]) return BTTSTokenInterface.CheckResult.OverflowError;
        return BTTSTokenInterface.CheckResult.Success;
    }
    function signedApprove(Data storage self, address tokenOwner, address spender, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public returns (bool success) {
        require(self.transferable);
        bytes32 hash = signedApproveHash(self, tokenOwner, spender, tokens, fee, nonce);
        require(tokenOwner != address(0) && tokenOwner == ecrecoverFromSig(keccak256(signingPrefix, hash), sig));
        require(!self.accountLocked[tokenOwner]);
        require(self.nextNonce[tokenOwner] == nonce);
        self.nextNonce[tokenOwner] = nonce + 1;
        self.allowed[tokenOwner][spender] = tokens;
        Approval(tokenOwner, spender, tokens);
        self.balances[tokenOwner] = safeSub(self.balances[tokenOwner], fee);
        self.balances[feeAccount] = safeAdd(self.balances[feeAccount], fee);
        Transfer(tokenOwner, feeAccount, fee);
        return true;
    }
    function signedTransferFromHash(Data storage /*self*/, address spender, address from, address to, uint tokens, uint fee, uint nonce) public view returns (bytes32 hash) {
        hash = keccak256(signedTransferFromSig, address(this), spender, from, to, tokens, fee, nonce);
    }
    function signedTransferFromCheck(Data storage self, address spender, address from, address to, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public view returns (BTTSTokenInterface.CheckResult result) {
        if (!self.transferable) return BTTSTokenInterface.CheckResult.NotTransferable;
        bytes32 hash = signedTransferFromHash(self, spender, from, to, tokens, fee, nonce);
        if (spender == address(0) || spender != ecrecoverFromSig(keccak256(signingPrefix, hash), sig)) return BTTSTokenInterface.CheckResult.SignerMismatch;
        if (self.accountLocked[from]) return BTTSTokenInterface.CheckResult.AccountLocked;
        if (self.nextNonce[spender] != nonce) return BTTSTokenInterface.CheckResult.InvalidNonce;
        uint total = safeAdd(tokens, fee);
        if (self.allowed[from][spender] < tokens) return BTTSTokenInterface.CheckResult.InsufficientApprovedTokens;
        if (self.allowed[from][spender] < total) return BTTSTokenInterface.CheckResult.InsufficientApprovedTokensForFees;
        if (self.balances[from] < tokens) return BTTSTokenInterface.CheckResult.InsufficientTokens;
        if (self.balances[from] < total) return BTTSTokenInterface.CheckResult.InsufficientTokensForFees;
        if (self.balances[to] + tokens < self.balances[to]) return BTTSTokenInterface.CheckResult.OverflowError;
        if (self.balances[feeAccount] + fee < self.balances[feeAccount]) return BTTSTokenInterface.CheckResult.OverflowError;
        return BTTSTokenInterface.CheckResult.Success;
    }
    function signedTransferFrom(Data storage self, address spender, address from, address to, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public returns (bool success) {
        require(self.transferable);
        bytes32 hash = signedTransferFromHash(self, spender, from, to, tokens, fee, nonce);
        require(spender != address(0) && spender == ecrecoverFromSig(keccak256(signingPrefix, hash), sig));
        require(!self.accountLocked[from]);
        require(self.nextNonce[spender] == nonce);
        self.nextNonce[spender] = nonce + 1;
        self.balances[from] = safeSub(self.balances[from], tokens);
        self.allowed[from][spender] = safeSub(self.allowed[from][spender], tokens);
        self.balances[to] = safeAdd(self.balances[to], tokens);
        Transfer(from, to, tokens);
        self.balances[from] = safeSub(self.balances[from], fee);
        self.allowed[from][spender] = safeSub(self.allowed[from][spender], fee);
        self.balances[feeAccount] = safeAdd(self.balances[feeAccount], fee);
        Transfer(from, feeAccount, fee);
        return true;
    }
    function signedApproveAndCallHash(Data storage /*self*/, address tokenOwner, address spender, uint tokens, bytes data, uint fee, uint nonce) public view returns (bytes32 hash) {
        hash = keccak256(signedApproveAndCallSig, address(this), tokenOwner, spender, tokens, data, fee, nonce);
    }
    function signedApproveAndCallCheck(Data storage self, address tokenOwner, address spender, uint tokens, bytes data, uint fee, uint nonce, bytes sig, address feeAccount) public view returns (BTTSTokenInterface.CheckResult result) {
        if (!self.transferable) return BTTSTokenInterface.CheckResult.NotTransferable;
        bytes32 hash = signedApproveAndCallHash(self, tokenOwner, spender, tokens, data, fee, nonce);
        if (tokenOwner == address(0) || tokenOwner != ecrecoverFromSig(keccak256(signingPrefix, hash), sig)) return BTTSTokenInterface.CheckResult.SignerMismatch;
        if (self.accountLocked[tokenOwner]) return BTTSTokenInterface.CheckResult.AccountLocked;
        if (self.nextNonce[tokenOwner] != nonce) return BTTSTokenInterface.CheckResult.InvalidNonce;
        if (self.balances[tokenOwner] < fee) return BTTSTokenInterface.CheckResult.InsufficientTokensForFees;
        if (self.balances[feeAccount] + fee < self.balances[feeAccount]) return BTTSTokenInterface.CheckResult.OverflowError;
        return BTTSTokenInterface.CheckResult.Success;
    }
    function signedApproveAndCall(Data storage self, address tokenOwner, address spender, uint tokens, bytes data, uint fee, uint nonce, bytes sig, address feeAccount) public returns (bool success) {
        require(self.transferable);
        bytes32 hash = signedApproveAndCallHash(self, tokenOwner, spender, tokens, data, fee, nonce);
        require(tokenOwner != address(0) && tokenOwner == ecrecoverFromSig(keccak256(signingPrefix, hash), sig));
        require(!self.accountLocked[tokenOwner]);
        require(self.nextNonce[tokenOwner] == nonce);
        self.nextNonce[tokenOwner] = nonce + 1;
        self.allowed[tokenOwner][spender] = tokens;
        Approval(tokenOwner, spender, tokens);
        self.balances[tokenOwner] = safeSub(self.balances[tokenOwner], fee);
        self.balances[feeAccount] = safeAdd(self.balances[feeAccount], fee);
        Transfer(tokenOwner, feeAccount, fee);
        ApproveAndCallFallBack(spender).receiveApproval(tokenOwner, tokens, address(this), data);
        return true;
    }
}


// ----------------------------------------------------------------------------
// BokkyPooBah's Token Teleportation Service Token v1.10
//
// Enjoy. (c) BokkyPooBah / Bok Consulting Pty Ltd 2018. The MIT Licence.
// ----------------------------------------------------------------------------
contract BTTSToken is BTTSTokenInterface {
    using BTTSLib for BTTSLib.Data;

    BTTSLib.Data data;

    // ------------------------------------------------------------------------
    // Constructor
    // ------------------------------------------------------------------------
    function BTTSToken(address owner, string symbol, string name, uint8 decimals, uint initialSupply, bool mintable, bool transferable) public {
        data.init(owner, symbol, name, decimals, initialSupply, mintable, transferable);
    }

    // ------------------------------------------------------------------------
    // Ownership
    // ------------------------------------------------------------------------
    function owner() public view returns (address) {
        return data.owner;
    }
    function newOwner() public view returns (address) {
        return data.newOwner;
    }
    function transferOwnership(address _newOwner) public {
        data.transferOwnership(_newOwner);
    }
    function acceptOwnership() public {
        data.acceptOwnership();
    }
    function transferOwnershipImmediately(address _newOwner) public {
        data.transferOwnershipImmediately(_newOwner);
    }

    // ------------------------------------------------------------------------
    // Token
    // ------------------------------------------------------------------------
    function symbol() public view returns (string) {
        return data.symbol;
    }
    function name() public view returns (string) {
        return data.name;
    }
    function decimals() public view returns (uint8) {
        return data.decimals;
    }

    // ------------------------------------------------------------------------
    // Minting and management
    // ------------------------------------------------------------------------
    function minter() public view returns (address) {
        return data.minter;
    }
    function setMinter(address _minter) public {
        data.setMinter(_minter);
    }
    function mint(address tokenOwner, uint tokens, bool lockAccount) public returns (bool success) {
        return data.mint(tokenOwner, tokens, lockAccount);
    }
    function accountLocked(address tokenOwner) public view returns (bool) {
        return data.accountLocked[tokenOwner];
    }
    function unlockAccount(address tokenOwner) public {
        data.unlockAccount(tokenOwner);
    }
    function mintable() public view returns (bool) {
        return data.mintable;
    }
    function transferable() public view returns (bool) {
        return data.transferable;
    }
    function disableMinting() public {
        data.disableMinting();
    }
    function enableTransfers() public {
        data.enableTransfers();
    }
    function nextNonce(address spender) public view returns (uint) {
        return data.nextNonce[spender];
    }

    // ------------------------------------------------------------------------
    // Other functions
    // ------------------------------------------------------------------------
    function transferAnyERC20Token(address tokenAddress, uint tokens) public returns (bool success) {
        return data.transferAnyERC20Token(tokenAddress, tokens);
    }

    // ------------------------------------------------------------------------
    // Don't accept ethers
    // ------------------------------------------------------------------------
    function () public payable {
        revert();
    }

    // ------------------------------------------------------------------------
    // Token functions
    // ------------------------------------------------------------------------
    function totalSupply() public view returns (uint) {
        return data.totalSupply - data.balances[address(0)];
    }
    function balanceOf(address tokenOwner) public view returns (uint balance) {
        return data.balances[tokenOwner];
    }
    function allowance(address tokenOwner, address spender) public view returns (uint remaining) {
        return data.allowed[tokenOwner][spender];
    }
    function transfer(address to, uint tokens) public returns (bool success) {
        return data.transfer(to, tokens);
    }
    function approve(address spender, uint tokens) public returns (bool success) {
        return data.approve(spender, tokens);
    }
    function transferFrom(address from, address to, uint tokens) public returns (bool success) {
        return data.transferFrom(from, to, tokens);
    }
    function approveAndCall(address spender, uint tokens, bytes _data) public returns (bool success) {
        return data.approveAndCall(spender, tokens, _data);
    }

    // ------------------------------------------------------------------------
    // Signed function
    // ------------------------------------------------------------------------
    function signedTransferHash(address tokenOwner, address to, uint tokens, uint fee, uint nonce) public view returns (bytes32 hash) {
        return data.signedTransferHash(tokenOwner, to, tokens, fee, nonce);
    }
    function signedTransferCheck(address tokenOwner, address to, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public view returns (CheckResult result) {
        return data.signedTransferCheck(tokenOwner, to, tokens, fee, nonce, sig, feeAccount);
    }
    function signedTransfer(address tokenOwner, address to, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public returns (bool success) {
        return data.signedTransfer(tokenOwner, to, tokens, fee, nonce, sig, feeAccount);
    }
    function signedApproveHash(address tokenOwner, address spender, uint tokens, uint fee, uint nonce) public view returns (bytes32 hash) {
        return data.signedApproveHash(tokenOwner, spender, tokens, fee, nonce);
    }
    function signedApproveCheck(address tokenOwner, address spender, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public view returns (CheckResult result) {
        return data.signedApproveCheck(tokenOwner, spender, tokens, fee, nonce, sig, feeAccount);
    }
    function signedApprove(address tokenOwner, address spender, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public returns (bool success) {
        return data.signedApprove(tokenOwner, spender, tokens, fee, nonce, sig, feeAccount);
    }
    function signedTransferFromHash(address spender, address from, address to, uint tokens, uint fee, uint nonce) public view returns (bytes32 hash) {
        return data.signedTransferFromHash(spender, from, to, tokens, fee, nonce);
    }
    function signedTransferFromCheck(address spender, address from, address to, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public view returns (CheckResult result) {
        return data.signedTransferFromCheck(spender, from, to, tokens, fee, nonce, sig, feeAccount);
    }
    function signedTransferFrom(address spender, address from, address to, uint tokens, uint fee, uint nonce, bytes sig, address feeAccount) public returns (bool success) {
        return data.signedTransferFrom(spender, from, to, tokens, fee, nonce, sig, feeAccount);
    }
    function signedApproveAndCallHash(address tokenOwner, address spender, uint tokens, bytes _data, uint fee, uint nonce) public view returns (bytes32 hash) {
        return data.signedApproveAndCallHash(tokenOwner, spender, tokens, _data, fee, nonce);
    }
    function signedApproveAndCallCheck(address tokenOwner, address spender, uint tokens, bytes _data, uint fee, uint nonce, bytes sig, address feeAccount) public view returns (CheckResult result) {
        return data.signedApproveAndCallCheck(tokenOwner, spender, tokens, _data, fee, nonce, sig, feeAccount);
    }
    function signedApproveAndCall(address tokenOwner, address spender, uint tokens, bytes _data, uint fee, uint nonce, bytes sig, address feeAccount) public returns (bool success) {
        return data.signedApproveAndCall(tokenOwner, spender, tokens, _data, fee, nonce, sig, feeAccount);
    }
}

// ----------------------------------------------------------------------------
// Owned contract
// ----------------------------------------------------------------------------
contract Owned {
    address public owner;
    address public newOwner;
    event OwnershipTransferred(address indexed _from, address indexed _to);

    function Owned() public {
        owner = msg.sender;
    }
    modifier onlyOwner {
        require(msg.sender == owner);
        _;
    }
    function transferOwnership(address _newOwner) public onlyOwner {
        newOwner = _newOwner;
    }
    function acceptOwnership() public {
        require(msg.sender == newOwner);
        OwnershipTransferred(owner, newOwner);
        owner = newOwner;
        newOwner = address(0);
    }
    function transferOwnershipImmediately(address _newOwner) public onlyOwner {
        OwnershipTransferred(owner, _newOwner);
        owner = _newOwner;
        newOwner = address(0);
    }
}


// ----------------------------------------------------------------------------
// BokkyPooBah's Token Teleportation Service Token Factory v1.10
//
// Enjoy. (c) BokkyPooBah / Bok Consulting Pty Ltd 2018. The MIT Licence.
// ----------------------------------------------------------------------------
contract BTTSTokenFactory is Owned {

    // ------------------------------------------------------------------------
    // Internal data
    // ------------------------------------------------------------------------
    mapping(address => bool) _verify;
    address[] public deployedTokens;

    // ------------------------------------------------------------------------
    // Event
    // ------------------------------------------------------------------------
    event BTTSTokenListing(address indexed ownerAddress,
        address indexed bttsTokenAddress,
        string symbol, string name, uint8 decimals,
        uint initialSupply, bool mintable, bool transferable);


    // ------------------------------------------------------------------------
    // Anyone can call this method to verify whether the bttsToken contract at
    // the specified address was deployed using this factory
    //
    // Parameters:
    //   tokenContract  the bttsToken contract address
    //
    // Return values:
    //   valid          did this BTTSTokenFactory create the BTTSToken contract?
    //   decimals       number of decimal places for the token contract
    //   initialSupply  the token initial supply
    //   mintable       is the token mintable after deployment?
    //   transferable   are the tokens transferable after deployment?
    // ------------------------------------------------------------------------
    function verify(address tokenContract) public view returns (
        bool    valid,
        address owner,
        uint    decimals,
        bool    mintable,
        bool    transferable
    ) {
        valid = _verify[tokenContract];
        if (valid) {
            BTTSToken t = BTTSToken(tokenContract);
            owner        = t.owner();
            decimals     = t.decimals();
            mintable     = t.mintable();
            transferable = t.transferable();
        }
    }


    // ------------------------------------------------------------------------
    // Any account can call this method to deploy a new BTTSToken contract.
    // The owner of the BTTSToken contract will be the calling account
    //
    // Parameters:
    //   symbol         symbol
    //   name           name
    //   decimals       number of decimal places for the token contract
    //   initialSupply  the token initial supply
    //   mintable       is the token mintable after deployment?
    //   transferable   are the tokens transferable after deployment?
    //
    // For example, deploying a BTTSToken contract with `initialSupply` of
    // 1,000.000000000000000000 tokens:
    //   symbol         "ME"
    //   name           "My Token"
    //   decimals       18
    //   initialSupply  10000000000000000000000 = 1,000.000000000000000000
    //                  tokens
    //   mintable       can tokens be minted after deployment?
    //   transferable   are the tokens transferable after deployment?
    //
    // The BTTSTokenListing() event is logged with the following parameters
    //   owner          the account that execute this transaction
    //   symbol         symbol
    //   name           name
    //   decimals       number of decimal places for the token contract
    //   initialSupply  the token initial supply
    //   mintable       can tokens be minted after deployment?
    //   transferable   are the tokens transferable after deployment?
    // ------------------------------------------------------------------------
    function deployBTTSTokenContract(
        string symbol,
        string name,
        uint8 decimals,
        uint initialSupply,
        bool mintable,
        bool transferable
    ) public returns (address bttsTokenAddress) {
        bttsTokenAddress = new BTTSToken(
            msg.sender,
            symbol,
            name,
            decimals,
            initialSupply,
            mintable,
            transferable);
        // Record that this factory created the trader
        _verify[bttsTokenAddress] = true;
        deployedTokens.push(bttsTokenAddress);
        BTTSTokenListing(msg.sender, bttsTokenAddress, symbol, name, decimals,
            initialSupply, mintable, transferable);
    }


    // ------------------------------------------------------------------------
    // Number of deployed tokens
    // ------------------------------------------------------------------------
    function numberOfDeployedTokens() public view returns (uint) {
        return deployedTokens.length;
    }

    // ------------------------------------------------------------------------
    // Factory owner can transfer out any accidentally sent ERC20 tokens
    //
    // Parameters:
    //   tokenAddress  contract address of the token contract being withdrawn
    //                 from
    //   tokens        number of tokens
    // ------------------------------------------------------------------------
    function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
        return ERC20Interface(tokenAddress).transfer(owner, tokens);
    }

    // ------------------------------------------------------------------------
    // Don't accept ethers
    // ------------------------------------------------------------------------
    function () public payable {
        revert();
    }
}

Contract Security Audit

Contract ABI

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Contract Creation Code

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bzzr://dbfaee8587da7b0e992e6332a324e4030afb395056213feb9e391cfb4d2104c3

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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.