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 Latest 25 txns from a total Of 25035 transactions
(+2 PendingTxns)

TxHash Age From To Value [TxFee]
0x4a4915a55450f4ce4c5193c4e381cba0b9ce145fe727952073ab6c6f43fe93b4(pending)0x9b05975a0709e94a7fcde93bcd8c1ca0bc9c2930  IN  0xd0929d411954c47438dc1d871dd6081f5c5e149c0 Ether(pending)
0x846bb6b4eaaf85360efd8f567a86d5f2c7c5a4e9884c80e424d0023c91fc9ee2(pending)0x6c78cce8acba2a792a9e3d11f11e86013f85bec6  IN  0xd0929d411954c47438dc1d871dd6081f5c5e149c0 Ether(pending)
0xf902bf533c3891e8a08d546702a3cdd02cdcf3b8d637589764266ba5bdb95dbb10 mins ago0x158532a62e82effd0492c2064f8fe4cf26909edb  IN   Refereum Token0 Ether0.000206352
0xb1f902ae00f53e62b40cfcb5e5589594f852a0a8f0cd13f3503d7b135ba8021f45 mins ago0x7f3cd5da54b7aaf26fe2eecdbc394bd4d05b5226  IN   Refereum Token0 Ether0.000336996
0x2efaba3d8c0df30501183130d547407930473fe1871678d653b2a50cf90ef1771 hr 19 mins ago0xd7fc5b2dedb528f403975b9d709c6d8721afdd62  IN   Refereum Token0 Ether0.00532704
0xdb53cb7749983ba19b5f1501fd64cb5b3088c25a953ff248f86b99d80c0ef36a1 hr 33 mins ago0xc8eafe7971dde0ed41feb449ed3fc12a8194fba2  IN   Refereum Token0 Ether0.000630927
0xa8dc61e656574ce9d1afa592a4c81414e9ce4770e581e1335289a6f2057f9d392 hrs 41 mins ago0x41ae00cb7084947cc8964d48a882af20ea17bbc1  IN   Refereum Token0 Ether0.00532704
0x1ee645abba204611e7a75571737a399a0ec23d3d10c94de4d9ba4d6409f17d222 hrs 46 mins ago0xce7c48f1e791bcc8f12b443a4e4839624d3c85c9  IN   Refereum Token0 Ether0.00154764
0x214c42739b1388addc99f69d10adf2524ba5a079c6fef22ae27f293d5a30a3214 hrs 6 mins ago0x6bddd1e83bab17f488e34db939cbdc74fb9b2550  IN   Refereum Token0 Ether0.00532704
0x242982a16b6aebf6a2e607c4ece85935946249d89bec6755f387c17a9c1d03344 hrs 25 mins ago0x40a3393ef22da6cceaf777c214176f3336d95a7d  IN   Refereum Token0 Ether0.000336996
0x17f1325ffd17f0dad5a532163bec5b85332746f059aa4441ca7b538fd4f4ac654 hrs 59 mins ago0x2f6d7d5f1919bb3dff26ebe0400e285c058f7a2c  IN   Refereum Token0 Ether0.00066588
0x2e2fb8472667335f9e37f2e050a00abdf91c9e7af11dc0949f11c0caaaf869f25 hrs 29 mins ago0x2c58e80cac929ad6c088c3b801d70d94255ffdfd  IN   Refereum Token0 Ether0.00532704
0x826d37de87976607e74b5a8b804a8d2c8c035b59ed7d797c02da4c2c237ded776 hrs 16 mins ago0x595aa265cf10c4d07b19d3f74f2b05a92739d577  IN   Refereum Token0 Ether0.000449328
0xd1a8baa753b3cdfd815823e738010e60a5d2f9a236be2dd359f382e0fe1540cd6 hrs 52 mins ago0xfc0edb63018e611627b3fe4ae986070146c00abb  IN   Refereum Token0 Ether0.00532704
0x50f91c45c628fd1e5dff22291d6c26016fd3773c45e24ad6e99bf06d6409684c7 hrs 50 mins ago0xc47928c0f1af5cf32488e2ee11f24a62e622df17  IN   Refereum Token0 Ether0.00025794
0x12c2460081e43830d14993547ad99b0e1b6d19c72d91c202dd4a8c91493d59ef7 hrs 51 mins ago0xce666655537b933f406c7a7ffe7a560b008cc801  IN   Refereum Token0 Ether0.00025794
0x3a2722a00b3c9d7d7ea704b243d25e7bd5c4cbc14043e4e29276ea8a246c105a7 hrs 53 mins ago0xfaa246c5bf4062274ad9a3ac1c8e6ab81b5f1ffd  IN   Refereum Token0 Ether0.00025794
0xc2b0074a006a017b038c7bdd5a32e4bf66ac59dfbe2efe5ee67270f80d795ce37 hrs 53 mins ago0x125b9f83d1e32fd794a5cdba4dc813ec2cdb1241  IN   Refereum Token0 Ether0.00025794
0xb5b7fb994936ba0511031159d33aeadec2bfa0c55e2282ad8af8727c34973ad57 hrs 54 mins ago0x0f399085619886b007db7a32ffd907e827d6b53f  IN   Refereum Token0 Ether0.00025794
0x4cf7b24ba139276cbf3a4aa0cf730c4ef66663be69ccf530c292523a6b68dd037 hrs 55 mins ago0x82a4a97addaa319077e0eaeccb001d55ace59a8f  IN   Refereum Token0 Ether0.00025794
0x9f1363e24acb890ac44cbabe17cfbe038b86567b45e619ade0265aa97a9479b57 hrs 55 mins ago0xf523e61464c88c5516b7ddfa2c95c9ee7af7e355  IN   Refereum Token0 Ether0.00025794
0xcfed228d4f989e6260c669b9e908bb342db1302e0ec88280fb2f7d8c79fab7397 hrs 57 mins ago0x7e5742a1c0ec673b0dc9e76adac99fe16decc11a  IN   Refereum Token0 Ether0.00025794
0x8ab14071a6603526b8c3da54b50022cdd1df9fcb37c8c74c65757a57ebc5599e7 hrs 57 mins ago0xb55da181a2393ae20974f5ba2f5c047abd60172d  IN   Refereum Token0 Ether0.00112332
0x5e61082caa05377a8ad1b583c51ecc4cd254653e972febd724a66f981bff872a8 hrs ago0x78d14e3ed7c448a6ee261423a6dcf271d75ab8a7  IN   Refereum Token0 Ether0.00025794
0x140eddab6f295614d93bcc7c6f13ab1dc04ff99b35bacc9c30a851c9593151f98 hrs ago0x3a2470dd7b84db14b6942c4f09556755e95cb38e  IN   Refereum Token0 Ether0.00025794
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 Internal Transactions as a result of Contract Execution
 Latest 9 Internal Transactions

ParentTxHash Block Age From To Value
0xf7b9f2de8ec13cbb9dc791d8b8bc2f7bc8f0a04de0d0d9b211d42ea790665dc3572096745 days 21 hrs ago0xd0929d411954c47438dc1d871dd6081f5c5e149c0xdfb0acd77b0a9538d2d1b05399a1f254a541076f0.005 Ether
0x3faa84dd300ad4fb55c2c6fe32349836e2c26607374e7afa8c0fb32898bdbf375313835116 days 1 hr ago0xd0929d411954c47438dc1d871dd6081f5c5e149c0xdfb0acd77b0a9538d2d1b05399a1f254a541076f0.0005 Ether
0xe621b0462afa94d10ad2652524310a7790b7938c42c5b7b7d95fd8161e0c32005253963126 days 3 hrs ago0xd0929d411954c47438dc1d871dd6081f5c5e149c0xdfb0acd77b0a9538d2d1b05399a1f254a541076f0.089424 Ether
0xb15cf0f18e5b8586439dabbb9a13ad2ed06051a8c5199960fec9f77664460a665253944126 days 3 hrs ago0xd0929d411954c47438dc1d871dd6081f5c5e149c0xdfb0acd77b0a9538d2d1b05399a1f254a541076f0.04555673 Ether
0xed3522837c249a7025249c7a2a4485f7e65b1683d5c84776b6818220889e3cad5174763139 days 14 hrs ago0xd0929d411954c47438dc1d871dd6081f5c5e149c0xdfb0acd77b0a9538d2d1b05399a1f254a541076f0.0001 Ether
0xc38e440ef032eb0ff12a3872f6c687f28ba7b0e44172cc99ef2c778e2828ee195057477159 days 10 hrs ago0xd0929d411954c47438dc1d871dd6081f5c5e149c0xdfb0acd77b0a9538d2d1b05399a1f254a541076f0.441512 Ether
0xa0b8893ecf300aaa207cc8d9e85ac4700d9319fa3a86fe536ff97d7f518f9e725020325165 days 15 hrs ago0xd0929d411954c47438dc1d871dd6081f5c5e149c0xdfb0acd77b0a9538d2d1b05399a1f254a541076f0.088496 Ether
0xa0c459d2260af165cd1a6d3174c6183e6074d5728e455727c34b0e84e649b5b74996078169 days 18 hrs ago0xd0929d411954c47438dc1d871dd6081f5c5e149c0xdfb0acd77b0a9538d2d1b05399a1f254a541076f0.210066974 Ether
0x2a8774717a95383700c231d0ed1b05acd2f5460c0794a34fd1013091f9c29f934977257172 days 22 hrs ago0xd0929d411954c47438dc1d871dd6081f5c5e149c0xdfb0acd77b0a9538d2d1b05399a1f254a541076f0.1 Ether
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Warning: The compiled contract might be susceptible to ZeroFunctionSelector (very low-severity), DelegateCallReturnValue (low-severity), ECRecoverMalformedInput (medium-severity), SkipEmptyStringLiteral (low-severity) Solidity compiler bugs.

Contract Source Code Verified (Exact match)
Contract Name: Refereum
Compiler Version: v0.4.11+commit.68ef5810
Optimization Enabled: Yes
Runs (Optimiser):  10000



  Contract Source Code   Find Similiar Contracts

pragma solidity 0.4.11;

contract RegistryICAPInterface {
    function parse(bytes32 _icap) constant returns(address, bytes32, bool);
    function institutions(bytes32 _institution) constant returns(address);
}

contract EToken2Interface {
    function registryICAP() constant returns(RegistryICAPInterface);
    function baseUnit(bytes32 _symbol) constant returns(uint8);
    function description(bytes32 _symbol) constant returns(string);
    function owner(bytes32 _symbol) constant returns(address);
    function isOwner(address _owner, bytes32 _symbol) constant returns(bool);
    function totalSupply(bytes32 _symbol) constant returns(uint);
    function balanceOf(address _holder, bytes32 _symbol) constant returns(uint);
    function isLocked(bytes32 _symbol) constant returns(bool);
    function issueAsset(bytes32 _symbol, uint _value, string _name, string _description, uint8 _baseUnit, bool _isReissuable) returns(bool);
    function reissueAsset(bytes32 _symbol, uint _value) returns(bool);
    function revokeAsset(bytes32 _symbol, uint _value) returns(bool);
    function setProxy(address _address, bytes32 _symbol) returns(bool);
    function lockAsset(bytes32 _symbol) returns(bool);
    function proxyTransferFromToICAPWithReference(address _from, bytes32 _icap, uint _value, string _reference, address _sender) returns(bool);
    function proxyApprove(address _spender, uint _value, bytes32 _symbol, address _sender) returns(bool);
    function allowance(address _from, address _spender, bytes32 _symbol) constant returns(uint);
    function proxyTransferFromWithReference(address _from, address _to, uint _value, bytes32 _symbol, string _reference, address _sender) returns(bool);
}

contract AssetInterface {
    function _performTransferWithReference(address _to, uint _value, string _reference, address _sender) returns(bool);
    function _performTransferToICAPWithReference(bytes32 _icap, uint _value, string _reference, address _sender) returns(bool);
    function _performApprove(address _spender, uint _value, address _sender) returns(bool);
    function _performTransferFromWithReference(address _from, address _to, uint _value, string _reference, address _sender) returns(bool);
    function _performTransferFromToICAPWithReference(address _from, bytes32 _icap, uint _value, string _reference, address _sender) returns(bool);
    function _performGeneric(bytes _data, address _sender) payable returns(bytes32) {
        throw;
    }
}

contract ERC20Interface {
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed from, address indexed spender, uint256 value);

    function totalSupply() constant returns(uint256 supply);
    function balanceOf(address _owner) constant returns(uint256 balance);
    function transfer(address _to, uint256 _value) returns(bool success);
    function transferFrom(address _from, address _to, uint256 _value) returns(bool success);
    function approve(address _spender, uint256 _value) returns(bool success);
    function allowance(address _owner, address _spender) constant returns(uint256 remaining);

    // function symbol() constant returns(string);
    function decimals() constant returns(uint8);
    // function name() constant returns(string);
}

contract AssetProxyInterface {
    function _forwardApprove(address _spender, uint _value, address _sender) returns(bool);
    function _forwardTransferFromWithReference(address _from, address _to, uint _value, string _reference, address _sender) returns(bool);
    function _forwardTransferFromToICAPWithReference(address _from, bytes32 _icap, uint _value, string _reference, address _sender) returns(bool);
    function balanceOf(address _owner) constant returns(uint);
}

contract Bytes32 {
    function _bytes32(string _input) internal constant returns(bytes32 result) {
        assembly {
            result := mload(add(_input, 32))
        }
    }
}

/**
 * @title EToken2 Asset Proxy.
 *
 * Proxy implements ERC20 interface and acts as a gateway to a single EToken2 asset.
 * Proxy adds etoken2Symbol and caller(sender) when forwarding requests to EToken2.
 * Every request that is made by caller first sent to the specific asset implementation
 * contract, which then calls back to be forwarded onto EToken2.
 *
 * Calls flow: Caller ->
 *             Proxy.func(...) ->
 *             Asset._performFunc(..., Caller.address) ->
 *             Proxy._forwardFunc(..., Caller.address) ->
 *             Platform.proxyFunc(..., symbol, Caller.address)
 *
 * Generic call flow: Caller ->
 *             Proxy.unknownFunc(...) ->
 *             Asset._performGeneric(..., Caller.address) ->
 *             Asset.unknownFunc(...)
 *
 * Asset implementation contract is mutable, but each user have an option to stick with
 * old implementation, through explicit decision made in timely manner, if he doesn't agree
 * with new rules.
 * Each user have a possibility to upgrade to latest asset contract implementation, without the
 * possibility to rollback.
 *
 * Note: all the non constant functions return false instead of throwing in case if state change
 * didn't happen yet.
 */
contract Refereum is ERC20Interface, AssetProxyInterface, Bytes32 {
    // Assigned EToken2, immutable.
    EToken2Interface public etoken2;

    // Assigned symbol, immutable.
    bytes32 public etoken2Symbol;

    // Assigned name, immutable. For UI.
    string public name;
    string public symbol;

    /**
     * Sets EToken2 address, assigns symbol and name.
     *
     * Can be set only once.
     *
     * @param _etoken2 EToken2 contract address.
     * @param _symbol assigned symbol.
     * @param _name assigned name.
     *
     * @return success.
     */
    function init(EToken2Interface _etoken2, string _symbol, string _name) returns(bool) {
        if (address(etoken2) != 0x0) {
            return false;
        }
        etoken2 = _etoken2;
        etoken2Symbol = _bytes32(_symbol);
        name = _name;
        symbol = _symbol;
        return true;
    }

    /**
     * Only EToken2 is allowed to call.
     */
    modifier onlyEToken2() {
        if (msg.sender == address(etoken2)) {
            _;
        }
    }

    /**
     * Only current asset owner is allowed to call.
     */
    modifier onlyAssetOwner() {
        if (etoken2.isOwner(msg.sender, etoken2Symbol)) {
            _;
        }
    }

    /**
     * Returns asset implementation contract for current caller.
     *
     * @return asset implementation contract.
     */
    function _getAsset() internal returns(AssetInterface) {
        return AssetInterface(getVersionFor(msg.sender));
    }

    function recoverTokens(uint _value) onlyAssetOwner() returns(bool) {
        return this.transferWithReference(msg.sender, _value, 'Tokens recovery');
    }

    /**
     * Returns asset total supply.
     *
     * @return asset total supply.
     */
    function totalSupply() constant returns(uint) {
        return etoken2.totalSupply(etoken2Symbol);
    }

    /**
     * Returns asset balance for a particular holder.
     *
     * @param _owner holder address.
     *
     * @return holder balance.
     */
    function balanceOf(address _owner) constant returns(uint) {
        return etoken2.balanceOf(_owner, etoken2Symbol);
    }

    /**
     * Returns asset allowance from one holder to another.
     *
     * @param _from holder that allowed spending.
     * @param _spender holder that is allowed to spend.
     *
     * @return holder to spender allowance.
     */
    function allowance(address _from, address _spender) constant returns(uint) {
        return etoken2.allowance(_from, _spender, etoken2Symbol);
    }

    /**
     * Returns asset decimals.
     *
     * @return asset decimals.
     */
    function decimals() constant returns(uint8) {
        return etoken2.baseUnit(etoken2Symbol);
    }

    /**
     * Transfers asset balance from the caller to specified receiver.
     *
     * @param _to holder address to give to.
     * @param _value amount to transfer.
     *
     * @return success.
     */
    function transfer(address _to, uint _value) returns(bool) {
        return transferWithReference(_to, _value, '');
    }

    /**
     * Transfers asset balance from the caller to specified receiver adding specified comment.
     * Resolves asset implementation contract for the caller and forwards there arguments along with
     * the caller address.
     *
     * @param _to holder address to give to.
     * @param _value amount to transfer.
     * @param _reference transfer comment to be included in a EToken2's Transfer event.
     *
     * @return success.
     */
    function transferWithReference(address _to, uint _value, string _reference) returns(bool) {
        return _getAsset()._performTransferWithReference(_to, _value, _reference, msg.sender);
    }

    /**
     * Transfers asset balance from the caller to specified ICAP.
     *
     * @param _icap recipient ICAP to give to.
     * @param _value amount to transfer.
     *
     * @return success.
     */
    function transferToICAP(bytes32 _icap, uint _value) returns(bool) {
        return transferToICAPWithReference(_icap, _value, '');
    }

    /**
     * Transfers asset balance from the caller to specified ICAP adding specified comment.
     * Resolves asset implementation contract for the caller and forwards there arguments along with
     * the caller address.
     *
     * @param _icap recipient ICAP to give to.
     * @param _value amount to transfer.
     * @param _reference transfer comment to be included in a EToken2's Transfer event.
     *
     * @return success.
     */
    function transferToICAPWithReference(bytes32 _icap, uint _value, string _reference) returns(bool) {
        return _getAsset()._performTransferToICAPWithReference(_icap, _value, _reference, msg.sender);
    }

    /**
     * Prforms allowance transfer of asset balance between holders.
     *
     * @param _from holder address to take from.
     * @param _to holder address to give to.
     * @param _value amount to transfer.
     *
     * @return success.
     */
    function transferFrom(address _from, address _to, uint _value) returns(bool) {
        return transferFromWithReference(_from, _to, _value, '');
    }

    /**
     * Prforms allowance transfer of asset balance between holders adding specified comment.
     * Resolves asset implementation contract for the caller and forwards there arguments along with
     * the caller address.
     *
     * @param _from holder address to take from.
     * @param _to holder address to give to.
     * @param _value amount to transfer.
     * @param _reference transfer comment to be included in a EToken2's Transfer event.
     *
     * @return success.
     */
    function transferFromWithReference(address _from, address _to, uint _value, string _reference) returns(bool) {
        return _getAsset()._performTransferFromWithReference(_from, _to, _value, _reference, msg.sender);
    }

    /**
     * Performs transfer call on the EToken2 by the name of specified sender.
     *
     * Can only be called by asset implementation contract assigned to sender.
     *
     * @param _from holder address to take from.
     * @param _to holder address to give to.
     * @param _value amount to transfer.
     * @param _reference transfer comment to be included in a EToken2's Transfer event.
     * @param _sender initial caller.
     *
     * @return success.
     */
    function _forwardTransferFromWithReference(address _from, address _to, uint _value, string _reference, address _sender) onlyImplementationFor(_sender) returns(bool) {
        return etoken2.proxyTransferFromWithReference(_from, _to, _value, etoken2Symbol, _reference, _sender);
    }

    /**
     * Prforms allowance transfer of asset balance between holders.
     *
     * @param _from holder address to take from.
     * @param _icap recipient ICAP address to give to.
     * @param _value amount to transfer.
     *
     * @return success.
     */
    function transferFromToICAP(address _from, bytes32 _icap, uint _value) returns(bool) {
        return transferFromToICAPWithReference(_from, _icap, _value, '');
    }

    /**
     * Prforms allowance transfer of asset balance between holders adding specified comment.
     * Resolves asset implementation contract for the caller and forwards there arguments along with
     * the caller address.
     *
     * @param _from holder address to take from.
     * @param _icap recipient ICAP address to give to.
     * @param _value amount to transfer.
     * @param _reference transfer comment to be included in a EToken2's Transfer event.
     *
     * @return success.
     */
    function transferFromToICAPWithReference(address _from, bytes32 _icap, uint _value, string _reference) returns(bool) {
        return _getAsset()._performTransferFromToICAPWithReference(_from, _icap, _value, _reference, msg.sender);
    }

    /**
     * Performs allowance transfer to ICAP call on the EToken2 by the name of specified sender.
     *
     * Can only be called by asset implementation contract assigned to sender.
     *
     * @param _from holder address to take from.
     * @param _icap recipient ICAP address to give to.
     * @param _value amount to transfer.
     * @param _reference transfer comment to be included in a EToken2's Transfer event.
     * @param _sender initial caller.
     *
     * @return success.
     */
    function _forwardTransferFromToICAPWithReference(address _from, bytes32 _icap, uint _value, string _reference, address _sender) onlyImplementationFor(_sender) returns(bool) {
        return etoken2.proxyTransferFromToICAPWithReference(_from, _icap, _value, _reference, _sender);
    }

    /**
     * Sets asset spending allowance for a specified spender.
     * Resolves asset implementation contract for the caller and forwards there arguments along with
     * the caller address.
     *
     * @param _spender holder address to set allowance to.
     * @param _value amount to allow.
     *
     * @return success.
     */
    function approve(address _spender, uint _value) returns(bool) {
        return _getAsset()._performApprove(_spender, _value, msg.sender);
    }

    /**
     * Performs allowance setting call on the EToken2 by the name of specified sender.
     *
     * Can only be called by asset implementation contract assigned to sender.
     *
     * @param _spender holder address to set allowance to.
     * @param _value amount to allow.
     * @param _sender initial caller.
     *
     * @return success.
     */
    function _forwardApprove(address _spender, uint _value, address _sender) onlyImplementationFor(_sender) returns(bool) {
        return etoken2.proxyApprove(_spender, _value, etoken2Symbol, _sender);
    }

    /**
     * Emits ERC20 Transfer event on this contract.
     *
     * Can only be, and, called by assigned EToken2 when asset transfer happens.
     */
    function emitTransfer(address _from, address _to, uint _value) onlyEToken2() {
        Transfer(_from, _to, _value);
    }

    /**
     * Emits ERC20 Approval event on this contract.
     *
     * Can only be, and, called by assigned EToken2 when asset allowance set happens.
     */
    function emitApprove(address _from, address _spender, uint _value) onlyEToken2() {
        Approval(_from, _spender, _value);
    }

    /**
     * Resolves asset implementation contract for the caller and forwards there transaction data,
     * along with the value. This allows for proxy interface growth.
     */
    function () payable {
        bytes32 result = _getAsset()._performGeneric.value(msg.value)(msg.data, msg.sender);
        assembly {
            mstore(0, result)
            return(0, 32)
        }
    }

    /**
     * Indicates an upgrade freeze-time start, and the next asset implementation contract.
     */
    event UpgradeProposal(address newVersion);

    // Current asset implementation contract address.
    address latestVersion;

    // Proposed next asset implementation contract address.
    address pendingVersion;

    // Upgrade freeze-time start.
    uint pendingVersionTimestamp;

    // Timespan for users to review the new implementation and make decision.
    uint constant UPGRADE_FREEZE_TIME = 3 days;

    // Asset implementation contract address that user decided to stick with.
    // 0x0 means that user uses latest version.
    mapping(address => address) userOptOutVersion;

    /**
     * Only asset implementation contract assigned to sender is allowed to call.
     */
    modifier onlyImplementationFor(address _sender) {
        if (getVersionFor(_sender) == msg.sender) {
            _;
        }
    }

    /**
     * Returns asset implementation contract address assigned to sender.
     *
     * @param _sender sender address.
     *
     * @return asset implementation contract address.
     */
    function getVersionFor(address _sender) constant returns(address) {
        return userOptOutVersion[_sender] == 0 ? latestVersion : userOptOutVersion[_sender];
    }

    /**
     * Returns current asset implementation contract address.
     *
     * @return asset implementation contract address.
     */
    function getLatestVersion() constant returns(address) {
        return latestVersion;
    }

    /**
     * Returns proposed next asset implementation contract address.
     *
     * @return asset implementation contract address.
     */
    function getPendingVersion() constant returns(address) {
        return pendingVersion;
    }

    /**
     * Returns upgrade freeze-time start.
     *
     * @return freeze-time start.
     */
    function getPendingVersionTimestamp() constant returns(uint) {
        return pendingVersionTimestamp;
    }

    /**
     * Propose next asset implementation contract address.
     *
     * Can only be called by current asset owner.
     *
     * Note: freeze-time should not be applied for the initial setup.
     *
     * @param _newVersion asset implementation contract address.
     *
     * @return success.
     */
    function proposeUpgrade(address _newVersion) onlyAssetOwner() returns(bool) {
        // Should not already be in the upgrading process.
        if (pendingVersion != 0x0) {
            return false;
        }
        // New version address should be other than 0x0.
        if (_newVersion == 0x0) {
            return false;
        }
        // Don't apply freeze-time for the initial setup.
        if (latestVersion == 0x0) {
            latestVersion = _newVersion;
            return true;
        }
        pendingVersion = _newVersion;
        pendingVersionTimestamp = now;
        UpgradeProposal(_newVersion);
        return true;
    }

    /**
     * Cancel the pending upgrade process.
     *
     * Can only be called by current asset owner.
     *
     * @return success.
     */
    function purgeUpgrade() onlyAssetOwner() returns(bool) {
        if (pendingVersion == 0x0) {
            return false;
        }
        delete pendingVersion;
        delete pendingVersionTimestamp;
        return true;
    }

    /**
     * Finalize an upgrade process setting new asset implementation contract address.
     *
     * Can only be called after an upgrade freeze-time.
     *
     * @return success.
     */
    function commitUpgrade() returns(bool) {
        if (pendingVersion == 0x0) {
            return false;
        }
        if (pendingVersionTimestamp + UPGRADE_FREEZE_TIME > now) {
            return false;
        }
        latestVersion = pendingVersion;
        delete pendingVersion;
        delete pendingVersionTimestamp;
        return true;
    }

    /**
     * Disagree with proposed upgrade, and stick with current asset implementation
     * until further explicit agreement to upgrade.
     *
     * @return success.
     */
    function optOut() returns(bool) {
        if (userOptOutVersion[msg.sender] != 0x0) {
            return false;
        }
        userOptOutVersion[msg.sender] = latestVersion;
        return true;
    }

    /**
     * Implicitly agree to upgrade to current and future asset implementation upgrades,
     * until further explicit disagreement.
     *
     * @return success.
     */
    function optIn() returns(bool) {
        delete userOptOutVersion[msg.sender];
        return true;
    }

    // Backwards compatibility.
    function multiAsset() constant returns(EToken2Interface) {
        return etoken2;
    }
}

    Contract ABI  
[{"constant":true,"inputs":[],"name":"multiAsset","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"}],"name":"approve","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":false,"inputs":[],"name":"commitUpgrade","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"getLatestVersion","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"},{"name":"_value","type":"uint256"},{"name":"_reference","type":"string"},{"name":"_sender","type":"address"}],"name":"_forwardTransferFromWithReference","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"}],"name":"emitApprove","outputs":[],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"emitTransfer","outputs":[],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_value","type":"uint256"}],"name":"recoverTokens","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"etoken2","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"getPendingVersionTimestamp","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[],"name":"purgeUpgrade","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":false,"inputs":[],"name":"optIn","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"},{"name":"_value","type":"uint256"},{"name":"_reference","type":"string"}],"name":"transferFromWithReference","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"}],"name":"balanceOf","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_icap","type":"bytes32"},{"name":"_value","type":"uint256"}],"name":"transferToICAP","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_icap","type":"bytes32"},{"name":"_value","type":"uint256"},{"name":"_reference","type":"string"}],"name":"transferToICAPWithReference","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"},{"name":"_sender","type":"address"}],"name":"_forwardApprove","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_icap","type":"bytes32"},{"name":"_value","type":"uint256"},{"name":"_reference","type":"string"},{"name":"_sender","type":"address"}],"name":"_forwardTransferFromToICAPWithReference","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_icap","type":"bytes32"},{"name":"_value","type":"uint256"},{"name":"_reference","type":"string"}],"name":"transferFromToICAPWithReference","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_icap","type":"bytes32"},{"name":"_value","type":"uint256"}],"name":"transferFromToICAP","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"etoken2Symbol","outputs":[{"name":"","type":"bytes32"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"getPendingVersion","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transfer","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"},{"name":"_reference","type":"string"}],"name":"transferWithReference","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_etoken2","type":"address"},{"name":"_symbol","type":"string"},{"name":"_name","type":"string"}],"name":"init","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_newVersion","type":"address"}],"name":"proposeUpgrade","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":false,"inputs":[],"name":"optOut","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_from","type":"address"},{"name":"_spender","type":"address"}],"name":"allowance","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_sender","type":"address"}],"name":"getVersionFor","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"payable":true,"type":"fallback"},{"anonymous":false,"inputs":[{"indexed":false,"name":"newVersion","type":"address"}],"name":"UpgradeProposal","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":true,"name":"spender","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Approval","type":"event"}]

  Contract Creation Code Switch To Opcodes View
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   Swarm Source:
bzzr://98e94b8b6bc6c305ad672235323039c0f64eae1b06a90d411d66a33af7ccf506

 

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