Sponsored Link:   TOKENLEND - the best P2P lending platform ICO is LIVE! - JOIN NOW AND GET BONUS!
Contract Overview
ETH Balance: 123,789.358637340613209943 Ether
ETH USD Value: $66,956,426.19 (@ $540.89/ETH)
No Of Transactions: 29638 txns
Token Contract (ERC20): Wrapped Ether (WETH)
  Latest 25 txns from a total Of 29638 transactions (+1 PendingTxn) View All

TxHash Age From To Value [TxFee]
0xaddb8d6308cdb90492871509158db5e27d50b86efea3c15b7b1107df30e890a2(pending)17 mins ago0x1a40ca0774518d8f7f41df7da070a4aae08184f1  IN  0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20 Ether(pending)
0x9df52381978956f65a8478a7658db0bc2351043b23658a7376185c6f2c30d0872 mins ago0x0f657a7c0247444e57dc1c97edde85dccb3c0cc0  IN   0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc21.3 Ether0.00028346
0xacb3ee0882f2bc876044595433cf93125b1caeeec131d90fcc80a05f786f84ba4 mins ago0x1114fa65a2f3d01b045dc2c22cfb224af4f16198  IN   0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20.14 Ether0.000056692
0xbcac4ead2417b97c9a164a11af7033ff08f942a55a3551eaeadcb9a9be8ba7119 mins ago0x74da690c098d612752d938323a5dfe42a1eab792  IN   0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20 Ether0.000055032
0x20c0d31c32ca60ae59a88f1264865f3754f6fcc04ae9eb97d4e49ef5e9bcb61c18 mins ago0x1114fa65a2f3d01b045dc2c22cfb224af4f16198  IN   0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20.45 Ether0.0000595266
0x05fc5c772c45956590547d363d491a532f9738ccb92639bd804cfcb2f32795e627 mins ago0x8228fd8c24aba0b3d9ee44fa1bc1b95deeed32df  IN   0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20 Ether0.000141528
0xb3b1c7710f858c6f506ba8b7eed56699063605ddcf1345c13a3bcaad20a3a0d630 mins ago0x74da690c098d612752d938323a5dfe42a1eab792  IN   0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20.52 Ether0.000086692
0xb1e3a1038adbc08a06d47dfdaa2a8034558724c36c63cb8f0c4cf790ec40c10f30 mins ago0x8228fd8c24aba0b3d9ee44fa1bc1b95deeed32df  IN   0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20.0003 Ether0.000130038
0xa18f7f065503cbc3d9b17833927e706d712e37a4427c72d2b0790924ddab3fc146 mins ago0x65d25e3f2696b73b850daa07dd1e267dcfa67f2d  IN   0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20 Ether0.00009128
0xe00344c8494f5847e837569e615a1d4d04880e79bad0b2c223727eababb90a3c50 mins ago0x195a0bf07d14148593d55bcd16521b3f9adcb73e  IN   0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20 Ether0.000064872
0xcef6c435549e953db6e5e653e01cd7d709eb8faef3811bb32aeab91d0b40f86d55 mins ago0xbe81cca2fc9f28e24ede0363ddfcdcba31ab1e3f  IN   0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20 Ether0.000188704
0x13d05bde6d1ddac9a967e064b0d349ac77e6c90f6ff9fe15bb6b63160deb39df1 hr 7 mins ago0xbe81cca2fc9f28e24ede0363ddfcdcba31ab1e3f  IN   0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20.01 Ether0.000086692
0xda6b3574d155d6b942306f1dd262820931ddef0a1c8aa182cbd579c2006ff94c1 hr 14 mins ago0x9b0e2c74b402b76bb82000ad7e1acdb2ced1bcae  IN   0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20.21 Ether0.000056692
0xc9a25402bbf98b59578e849e2bf116077090728c01f650aefb24e80f8c96883b1 hr 17 mins ago0x4b6cdf9ec91119226dececea09c19034b5368520  IN   0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20 Ether0.00047176
0x2b602eea0a370972da2f795fd8f711afa67392b069fa60cbc299a2f19eb441761 hr 18 mins ago0xda03833f99e2bd2435af3e7c6be6c6319a52c622  IN   0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20.012 Ether0.000056692
0x8b805a5d438b82da1152797452fcd67a71d4d7832ad8acf139c5f5f360e180ac1 hr 20 mins ago0x4b6cdf9ec91119226dececea09c19034b5368520  IN   0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20.8577 Ether0.00043346
0xb01f7150e6b88201477ac073fe0667301922f1e6f3da251dcd9d5c453446ef491 hr 26 mins ago0xda03833f99e2bd2435af3e7c6be6c6319a52c622  IN   0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20 Ether0.000842352
0x3e0b428d31bbf1635576204a3005bf3e3306b9e8116e67d4764ec9666d32f9f71 hr 29 mins ago0xda03833f99e2bd2435af3e7c6be6c6319a52c622  IN   0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20.00266345 Ether0.000996958
0x070e30a1525d1e0466ed0b4785f229a722fe5aaeb2af9b5772e41398f90c8e4e1 hr 29 mins ago0xda03833f99e2bd2435af3e7c6be6c6319a52c622  IN   0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20 Ether0.001052664
0x952ea3edaad683bd569a6b90af586249b3b695f79fa8f78fe721728ca983b4a82 hrs 2 mins ago0xdda6b4f2e143525b3b0b9aa785761bbae400b822  IN   0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc22 Ether0.000113384
0x8acc565c98d08d72c27f3885cf5a2eab1f3e4e02682c67118e5763b72554477a2 hrs 2 mins ago0x2c4268a8845451544b5e1285b683792a05cc3206  IN   0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20.01 Ether0.000210973109
0x9e869879da4814360a0ef05e28e58c9570033a4aece1698b56e1f85bb0686ef32 hrs 21 mins ago0x4969358e80cdc3d74477d7447bffa3b2e2acbe92  IN   0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20 Ether0.000109662
0x228220d06d86c9c2823c86bca707eee949ea3b90e9e4d3d677b266c7cdbf8f602 hrs 22 mins ago0xdda6b4f2e143525b3b0b9aa785761bbae400b822  IN   0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20 Ether0.000146496
0xaa213c6d329a741bab721b1226477b45c245365ce0454cba519a866d4880d3752 hrs 28 mins ago0xd63a22663d7e668f038af0d382a4e050658b5a37  IN   0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20 Ether0.00047176
0x726a23d80b039a39f6e8d5552b4156ba8f01d891cbeb613a2b55f3c6ca1d7ccd2 hrs 28 mins ago0xd63a22663d7e668f038af0d382a4e050658b5a37  IN   0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20.14075 Ether0.00043346
[ Download CSV Export  ] 
 Internal Transactions as a result of Contract Execution
  Latest 25 Internal Txns, Click here to View More View All
ParentTxHash Block Age From To Value
0xbcac4ead2417b97c9a164a11af7033ff08f942a55a3551eaeadcb9a9be8ba71153119519 mins ago0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20x74da690c098d612752d938323a5dfe42a1eab7920.2020053 Ether
0xe00344c8494f5847e837569e615a1d4d04880e79bad0b2c223727eababb90a3c531178150 mins ago0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20x195a0bf07d14148593d55bcd16521b3f9adcb73e0.25 Ether
0x948f3d2fb8e5c06a51ebab911ea1139f7b7c903306fe48af675b88f88313da5c53116881 hr 13 mins ago0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20x980cae4f2c7301d1d23fc709c379657c90d27d520.33 Ether
0x948f3d2fb8e5c06a51ebab911ea1139f7b7c903306fe48af675b88f88313da5c53116881 hr 13 mins ago0x980cae4f2c7301d1d23fc709c379657c90d27d520xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20.315000000000000001 Ether
0xb01f7150e6b88201477ac073fe0667301922f1e6f3da251dcd9d5c453446ef4953116231 hr 26 mins ago0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20xda03833f99e2bd2435af3e7c6be6c6319a52c6220.0026634 Ether
0x228220d06d86c9c2823c86bca707eee949ea3b90e9e4d3d677b266c7cdbf8f6053113862 hrs 22 mins ago0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20xdda6b4f2e143525b3b0b9aa785761bbae400b8221.2 Ether
0xd0f68c1ffb8520340cfb751b9f75d0884f2063fbc0f69755f46748a8ad3a76de53112522 hrs 56 mins ago0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20xb2ebb7d1ca5a83755ffe3ce97b0c867ab1a7e6a80.5 Ether
0xffb42ad2e8e91544c2ade8dbb350d98b38b050bade725c19bfb3e12f500b915e53111203 hrs 28 mins ago0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20x1617b4c6fd8befee9a42d24a9ab0a56abf517efe0.03 Ether
0x12cd29889633e1e3e2f158bbfb43fc6d5f0ed89331b63097fb5a533be99c06ad53111003 hrs 33 mins ago0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20x5c1399d58819661ccbcf456b401f0e685f3d89980.02 Ether
0x8ca9e7d8406d46b559ae7e0dbd8441bec516eea34bdf22ebc705c54b1d9d7f3153109654 hrs 10 mins ago0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20xd01af191c9143e26e7103d6fe41412b894b25e9721.290688 Ether
0x29f97361dcc53637ed60e0a5611e6034206a6d103d30d275d2df1b493967028353108824 hrs 31 mins ago0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20x553a9cc2166de7cf14da68a9f986155c67d2966e2.715 Ether
0xd9ea66ce21627ffaac8ec081f5412f931b2a6a16b3a64682db7958f6c31abe4d53108524 hrs 39 mins ago0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20xd01af191c9143e26e7103d6fe41412b894b25e9727.6501614 Ether
0x580200fe881dd7f6367bdddb353bfbff81f24492e5d8ed1737ef28c4f02fd7e153108314 hrs 45 mins ago0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20x17a7f0e2dd5f69e6e8229c3c12b14e5d2a5a55250.061 Ether
0xa5e684f398947cc26d0d091bf554b036270e41407dd56f5f9473a2bfc5dd0b3d53105176 hrs 1 min ago0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20xa9c11cf36d2e127e0c8c24a4db96904286d7489b0.098635181001658634 Ether
0xe3f2ff9dafb17cd8cd63135d5b9c4f0dfda937b81361b92a9b5cc1cd8d0f05f453105086 hrs 3 mins ago0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20xfe10f78482236b6fc2346784cc78a5e91a4440f90.0027 Ether
0x67c608d1cf68d80e6bd8d560dd8e25573a20e4850c34cbbf642f7bae91c8694d53104246 hrs 22 mins ago0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20xa9c11cf36d2e127e0c8c24a4db96904286d7489b29.919868961686101866 Ether
0xa5959ca1e7a99a99fe4bc66373afa13cdbf34341fce6364964caad5c79724a5c53102167 hrs 13 mins ago0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20xbdfd4f31c55ccb866ab6ff9ed2863f1a4ceac8d60.0772 Ether
0x7c349b7f92bb6cdce23e844cda8dbbd6f0fa672a990f8cc319d250775c1af5b853100217 hrs 57 mins ago0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20x5ff2ade59322e60b7dbc2a0846fcefa60bdea5310.2853276 Ether
0xd61a004fd41652d83cbd2b80c8edc6f0847314364e266d4b596ea8534bc71c1f53099688 hrs 11 mins ago0x980cae4f2c7301d1d23fc709c379657c90d27d520xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc21.952259278529838338 Ether
0x9c972e614eba38bbf15583b728cc53398cb868e262da314e0010f9a134120cc553099588 hrs 16 mins ago0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20x4ae44ad16ab618b7f4db41474970c37d38c44fd736.8582989 Ether
0x6a984b6820328c4bde8929146f477f8006e4f4f755eab16579c8380ca41bd49653099498 hrs 18 mins ago0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20xcc3e1e9703ca6e5e0ae297f364de049fcbf6c98c3 Ether
0xa045afc15274232908d057ba4af17ce3f660b7052005e7a4cd6e55e9a7ba51ff53099338 hrs 23 mins ago0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20x85fef2130b4afc7493ff12c2a890ecab641c8d280.2342 Ether
0xcdf7d39338263c51f5bf937182b0274a44b0e2692cb3b2953c6ebbd90e3121d753097369 hrs 16 mins ago0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20x98de69fc87790bf9679e5b781a03e6821f3d2f7530.354819 Ether
0x5bcf48aae7ebd768de86ec3bbb831a7c058222a7a6d7bc163a62432bf72e59c153097129 hrs 23 mins ago0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20x0ec8c947d74ef2f0e100216c5919e855cdbeee760.018737846384909618 Ether
0x2b98e09dcd5e5eb8ca4db282004e73c06d798901e2ce9af7937e7b2a3c0c7c6b53097039 hrs 24 mins ago0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc20x85fef2130b4afc7493ff12c2a890ecab641c8d280.25 Ether
[ Download CSV Export  ] 
Contract Source Code Verified
Contract Name: WETH9
Compiler Version: v0.4.19+commit.c4cbbb05
Optimization Enabled: No
Runs (Optimiser):  200

  Contract Source Code   Find Similiar Contracts
// Copyright (C) 2015, 2016, 2017 Dapphub

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.4.18;

contract WETH9 {
    string public name     = "Wrapped Ether";
    string public symbol   = "WETH";
    uint8  public decimals = 18;

    event  Approval(address indexed src, address indexed guy, uint wad);
    event  Transfer(address indexed src, address indexed dst, uint wad);
    event  Deposit(address indexed dst, uint wad);
    event  Withdrawal(address indexed src, uint wad);

    mapping (address => uint)                       public  balanceOf;
    mapping (address => mapping (address => uint))  public  allowance;

    function() public payable {
    function deposit() public payable {
        balanceOf[msg.sender] += msg.value;
        Deposit(msg.sender, msg.value);
    function withdraw(uint wad) public {
        require(balanceOf[msg.sender] >= wad);
        balanceOf[msg.sender] -= wad;
        Withdrawal(msg.sender, wad);

    function totalSupply() public view returns (uint) {
        return this.balance;

    function approve(address guy, uint wad) public returns (bool) {
        allowance[msg.sender][guy] = wad;
        Approval(msg.sender, guy, wad);
        return true;

    function transfer(address dst, uint wad) public returns (bool) {
        return transferFrom(msg.sender, dst, wad);

    function transferFrom(address src, address dst, uint wad)
        returns (bool)
        require(balanceOf[src] >= wad);

        if (src != msg.sender && allowance[src][msg.sender] != uint(-1)) {
            require(allowance[src][msg.sender] >= wad);
            allowance[src][msg.sender] -= wad;

        balanceOf[src] -= wad;
        balanceOf[dst] += wad;

        Transfer(src, dst, wad);

        return true;

                    GNU GENERAL PUBLIC LICENSE
                       Version 3, 29 June 2007

 Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.


  The GNU General Public License is a free, copyleft license for
software and other kinds of works.

  The licenses for most software and other practical works are designed
to take away your freedom to share and change the works.  By contrast,
the GNU General Public License is intended to guarantee your freedom to
share and change all versions of a program--to make sure it remains free
software for all its users.  We, the Free Software Foundation, use the
GNU General Public License for most of our software; it applies also to
any other work released this way by its authors.  You can apply it to
your programs, too.

  When we speak of free software, we are referring to freedom, not
price.  Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
them if you wish), that you receive source code or can get it if you
want it, that you can change the software or use pieces of it in new
free programs, and that you know you can do these things.

  To protect your rights, we need to prevent others from denying you
these rights or asking you to surrender the rights.  Therefore, you have
certain responsibilities if you distribute copies of the software, or if
you modify it: responsibilities to respect the freedom of others.

  For example, if you distribute copies of such a program, whether
gratis or for a fee, you must pass on to the recipients the same
freedoms that you received.  You must make sure that they, too, receive
or can get the source code.  And you must show them these terms so they
know their rights.

  Developers that use the GNU GPL protect your rights with two steps:
(1) assert copyright on the software, and (2) offer you this License
giving you legal permission to copy, distribute and/or modify it.

  For the developers' and authors' protection, the GPL clearly explains
that there is no warranty for this free software.  For both users' and
authors' sake, the GPL requires that modified versions be marked as
changed, so that their problems will not be attributed erroneously to
authors of previous versions.

  Some devices are designed to deny users access to install or run
modified versions of the software inside them, although the manufacturer
can do so.  This is fundamentally incompatible with the aim of
protecting users' freedom to change the software.  The systematic
pattern of such abuse occurs in the area of products for individuals to
use, which is precisely where it is most unacceptable.  Therefore, we
have designed this version of the GPL to prohibit the practice for those
products.  If such problems arise substantially in other domains, we
stand ready to extend this provision to those domains in future versions
of the GPL, as needed to protect the freedom of users.

  Finally, every program is threatened constantly by software patents.
States should not allow patents to restrict development and use of
software on general-purpose computers, but in those that do, we wish to
avoid the special danger that patents applied to a free program could
make it effectively proprietary.  To prevent this, the GPL assures that
patents cannot be used to render the program non-free.

  The precise terms and conditions for copying, distribution and
modification follow.

                       TERMS AND CONDITIONS

  0. Definitions.

  "This License" refers to version 3 of the GNU General Public License.

  "Copyright" also means copyright-like laws that apply to other kinds of
works, such as semiconductor masks.

  "The Program" refers to any copyrightable work licensed under this
License.  Each licensee is addressed as "you".  "Licensees" and
"recipients" may be individuals or organizations.

  To "modify" a work means to copy from or adapt all or part of the work
in a fashion requiring copyright permission, other than the making of an
exact copy.  The resulting work is called a "modified version" of the
earlier work or a work "based on" the earlier work.

  A "covered work" means either the unmodified Program or a work based
on the Program.

  To "propagate" a work means to do anything with it that, without
permission, would make you directly or secondarily liable for
infringement under applicable copyright law, except executing it on a
computer or modifying a private copy.  Propagation includes copying,
distribution (with or without modification), making available to the
public, and in some countries other activities as well.

  To "convey" a work means any kind of propagation that enables other
parties to make or receive copies.  Mere interaction with a user through
a computer network, with no transfer of a copy, is not conveying.

  An interactive user interface displays "Appropriate Legal Notices"
to the extent that it includes a convenient and prominently visible
feature that (1) displays an appropriate copyright notice, and (2)
tells the user that there is no warranty for the work (except to the
extent that warranties are provided), that licensees may convey the
work under this License, and how to view a copy of this License.  If
the interface presents a list of user commands or options, such as a
menu, a prominent item in the list meets this criterion.

  1. Source Code.

  The "source code" for a work means the preferred form of the work
for making modifications to it.  "Object code" means any non-source
form of a work.

  A "Standard Interface" means an interface that either is an official
standard defined by a recognized standards body, or, in the case of
interfaces specified for a particular programming language, one that
is widely used among developers working in that language.

  The "System Libraries" of an executable work include anything, other
than the work as a whole, that (a) is included in the normal form of
packaging a Major Component, but which is not part of that Major
Component, and (b) serves only to enable use of the work with that
Major Component, or to implement a Standard Interface for which an
implementation is available to the public in source code form.  A
"Major Component", in this context, means a major essential component
(kernel, window system, and so on) of the specific operating system
(if any) on which the executable work runs, or a compiler used to
produce the work, or an object code interpreter used to run it.

  The "Corresponding Source" for a work in object code form means all
the source code needed to generate, install, and (for an executable
work) run the object code and to modify the work, including scripts to
control those activities.  However, it does not include the work's
System Libraries, or general-purpose tools or generally available free
programs which are used unmodified in performing those activities but
which are not part of the work.  For example, Corresponding Source
includes interface definition files associated with source files for
the work, and the source code for shared libraries and dynamically
linked subprograms that the work is specifically designed to require,
such as by intimate data communication or control flow between those
subprograms and other parts of the work.

  The Corresponding Source need not include anything that users
can regenerate automatically from other parts of the Corresponding

  The Corresponding Source for a work in source code form is that
same work.

  2. Basic Permissions.

  All rights granted under this License are granted for the term of
copyright on the Program, and are irrevocable provided the stated
conditions are met.  This License explicitly affirms your unlimited
permission to run the unmodified Program.  The output from running a
covered work is covered by this License only if the output, given its
content, constitutes a covered work.  This License acknowledges your
rights of fair use or other equivalent, as provided by copyright law.

  You may make, run and propagate covered works that you do not
convey, without conditions so long as your license otherwise remains
in force.  You may convey covered works to others for the sole purpose
of having them make modifications exclusively for you, or provide you
with facilities for running those works, provided that you comply with
the terms of this License in conveying all material for which you do
not control copyright.  Those thus making or running the covered works
for you must do so exclusively on your behalf, under your direction
and control, on terms that prohibit them from making any copies of
your copyrighted material outside their relationship with you.

  Conveying under any other circumstances is permitted solely under
the conditions stated below.  Sublicensing is not allowed; section 10
makes it unnecessary.

  3. Protecting Users' Legal Rights From Anti-Circumvention Law.

  No covered work shall be deemed part of an effective technological
measure under any applicable law fulfilling obligations under article
11 of the WIPO copyright treaty adopted on 20 December 1996, or
similar laws prohibiting or restricting circumvention of such

  When you convey a covered work, you waive any legal power to forbid
circumvention of technological measures to the extent such circumvention
is effected by exercising rights under this License with respect to
the covered work, and you disclaim any intention to limit operation or
modification of the work as a means of enforcing, against the work's
users, your or third parties' legal rights to forbid circumvention of
technological measures.

  4. Conveying Verbatim Copies.

  You may convey verbatim copies of the Program's source code as you
receive it, in any medium, provided that you conspicuously and
appropriately publish on each copy an appropriate copyright notice;
keep intact all notices stating that this License and any
non-permissive terms added in accord with section 7 apply to the code;
keep intact all notices of the absence of any warranty; and give all
recipients a copy of this License along with the Program.

  You may charge any price or no price for each copy that you convey,
and you may offer support or warranty protection for a fee.

  5. Conveying Modified Source Versions.

  You may convey a work based on the Program, or the modifications to
produce it from the Program, in the form of source code under the
terms of section 4, provided that you also meet all of these conditions:

    a) The work must carry prominent notices stating that you modified
    it, and giving a relevant date.

    b) The work must carry prominent notices stating that it is
    released under this License and any conditions added under section
    7.  This requirement modifies the requirement in section 4 to
    "keep intact all notices".

    c) You must license the entire work, as a whole, under this
    License to anyone who comes into possession of a copy.  This
    License will therefore apply, along with any applicable section 7
    additional terms, to the whole of the work, and all its parts,
    regardless of how they are packaged.  This License gives no
    permission to license the work in any other way, but it does not
    invalidate such permission if you have separately received it.

    d) If the work has interactive user interfaces, each must display
    Appropriate Legal Notices; however, if the Program has interactive
    interfaces that do not display Appropriate Legal Notices, your
    work need not make them do so.

  A compilation of a covered work with other separate and independent
works, which are not by their nature extensions of the covered work,
and which are not combined with it such as to form a larger program,
in or on a volume of a storage or distribution medium, is called an
"aggregate" if the compilation and its resulting copyright are not
used to limit the access or legal rights of the compilation's users
beyond what the individual works permit.  Inclusion of a covered work
in an aggregate does not cause this License to apply to the other
parts of the aggregate.

  6. Conveying Non-Source Forms.

  You may convey a covered work in object code form under the terms
of sections 4 and 5, provided that you also convey the
machine-readable Corresponding Source under the terms of this License,
in one of these ways:

    a) Convey the object code in, or embodied in, a physical product
    (including a physical distribution medium), accompanied by the
    Corresponding Source fixed on a durable physical medium
    customarily used for software interchange.

    b) Convey the object code in, or embodied in, a physical product
    (including a physical distribution medium), accompanied by a
    written offer, valid for at least three years and valid for as
    long as you offer spare parts or customer support for that product
    model, to give anyone who possesses the object code either (1) a
    copy of the Corresponding Source for all the software in the
    product that is covered by this License, on a durable physical
    medium customarily used for software interchange, for a price no
    more than your reasonable cost of physically performing this
    conveying of source, or (2) access to copy the
    Corresponding Source from a network server at no charge.

    c) Convey individual copies of the object code with a copy of the
    written offer to provide the Corresponding Source.  This
    alternative is allowed only occasionally and noncommercially, and
    only if you received the object code with such an offer, in accord
    with subsection 6b.

    d) Convey the object code by offering access from a designated
    place (gratis or for a charge), and offer equivalent access to the
    Corresponding Source in the same way through the same place at no
    further charge.  You need not require recipients to copy the
    Corresponding Source along with the object code.  If the place to
    copy the object code is a network server, the Corresponding Source
    may be on a different server (operated by you or a third party)
    that supports equivalent copying facilities, provided you maintain
    clear directions next to the object code saying where to find the
    Corresponding Source.  Regardless of what server hosts the
    Corresponding Source, you remain obligated to ensure that it is
    available for as long as needed to satisfy these requirements.

    e) Convey the object code using peer-to-peer transmission, provided
    you inform other peers where the object code and Corresponding
    Source of the work are being offered to the general public at no
    charge under subsection 6d.

  A separable portion of the object code, whose source code is excluded
from the Corresponding Source as a System Library, need not be
included in conveying the object code work.

  A "User Product" is either (1) a "consumer product", which means any
tangible personal property which is normally used for personal, family,
or household purposes, or (2) anything designed or sold for incorporation
into a dwelling.  In determining whether a product is a consumer product,
doubtful cases shall be resolved in favor of coverage.  For a particular
product received by a particular user, "normally used" refers to a
typical or common use of that class of product, regardless of the status
of the particular user or of the way in which the particular user
actually uses, or expects or is expected to use, the product.  A product
is a consumer product regardless of whether the product has substantial
commercial, industrial or non-consumer uses, unless such uses represent
the only significant mode of use of the product.

  "Installation Information" for a User Product means any methods,
procedures, authorization keys, or other information required to install
and execute modified versions of a covered work in that User Product from
a modified version of its Corresponding Source.  The information must
suffice to ensure that the continued functioning of the modified object
code is in no case prevented or interfered with solely because
modification has been made.

  If you convey an object code work under this section in, or with, or
specifically for use in, a User Product, and the conveying occurs as
part of a transaction in which the right of possession and use of the
User Product is transferred to the recipient in perpetuity or for a
fixed term (regardless of how the transaction is characterized), the
Corresponding Source conveyed under this section must be accompanied
by the Installation Information.  But this requirement does not apply
if neither you nor any third party retains the ability to install
modified object code on the User Product (for example, the work has
been installed in ROM).

  The requirement to provide Installation Information does not include a
requirement to continue to provide support service, warranty, or updates
for a work that has been modified or installed by the recipient, or for
the User Product in which it has been modified or installed.  Access to a
network may be denied when the modification itself materially and
adversely affects the operation of the network or violates the rules and
protocols for communication across the network.

  Corresponding Source conveyed, and Installation Information provided,
in accord with this section must be in a format that is publicly
documented (and with an implementation available to the public in
source code form), and must require no special password or key for
unpacking, reading or copying.

  7. Additional Terms.

  "Additional permissions" are terms that supplement the terms of this
License by making exceptions from one or more of its conditions.
Additional permissions that are applicable to the entire Program shall
be treated as though they were included in this License, to the extent
that they are valid under applicable law.  If additional permissions
apply only to part of the Program, that part may be used separately
under those permissions, but the entire Program remains governed by
this License without regard to the additional permissions.

  When you convey a copy of a covered work, you may at your option
remove any additional permissions from that copy, or from any part of
it.  (Additional permissions may be written to require their own
removal in certain cases when you modify the work.)  You may place
additional permissions on material, added by you to a covered work,
for which you have or can give appropriate copyright permission.

  Notwithstanding any other provision of this License, for material you
add to a covered work, you may (if authorized by the copyright holders of
that material) supplement the terms of this License with terms:

    a) Disclaiming warranty or limiting liability differently from the
    terms of sections 15 and 16 of this License; or

    b) Requiring preservation of specified reasonable legal notices or
    author attributions in that material or in the Appropriate Legal
    Notices displayed by works containing it; or

    c) Prohibiting misrepresentation of the origin of that material, or
    requiring that modified versions of such material be marked in
    reasonable ways as different from the original version; or

    d) Limiting the use for publicity purposes of names of licensors or
    authors of the material; or

    e) Declining to grant rights under trademark law for use of some
    trade names, trademarks, or service marks; or

    f) Requiring indemnification of licensors and authors of that
    material by anyone who conveys the material (or modified versions of
    it) with contractual assumptions of liability to the recipient, for
    any liability that these contractual assumptions directly impose on
    those licensors and authors.

  All other non-permissive additional terms are considered "further
restrictions" within the meaning of section 10.  If the Program as you
received it, or any part of it, contains a notice stating that it is
governed by this License along with a term that is a further
restriction, you may remove that term.  If a license document contains
a further restriction but permits relicensing or conveying under this
License, you may add to a covered work material governed by the terms
of that license document, provided that the further restriction does
not survive such relicensing or conveying.

  If you add terms to a covered work in accord with this section, you
must place, in the relevant source files, a statement of the
additional terms that apply to those files, or a notice indicating
where to find the applicable terms.

  Additional terms, permissive or non-permissive, may be stated in the
form of a separately written license, or stated as exceptions;
the above requirements apply either way.

  8. Termination.

  You may not propagate or modify a covered work except as expressly
provided under this License.  Any attempt otherwise to propagate or
modify it is void, and will automatically terminate your rights under
this License (including any patent licenses granted under the third
paragraph of section 11).

  However, if you cease all violation of this License, then your
license from a particular copyright holder is reinstated (a)
provisionally, unless and until the copyright holder explicitly and
finally terminates your license, and (b) permanently, if the copyright
holder fails to notify you of the violation by some reasonable means
prior to 60 days after the cessation.

  Moreover, your license from a particular copyright holder is
reinstated permanently if the copyright holder notifies you of the
violation by some reasonable means, this is the first time you have
received notice of violation of this License (for any work) from that
copyright holder, and you cure the violation prior to 30 days after
your receipt of the notice.

  Termination of your rights under this section does not terminate the
licenses of parties who have received copies or rights from you under
this License.  If your rights have been terminated and not permanently
reinstated, you do not qualify to receive new licenses for the same
material under section 10.

  9. Acceptance Not Required for Having Copies.

  You are not required to accept this License in order to receive or
run a copy of the Program.  Ancillary propagation of a covered work
occurring solely as a consequence of using peer-to-peer transmission
to receive a copy likewise does not require acceptance.  However,
nothing other than this License grants you permission to propagate or
modify any covered work.  These actions infringe copyright if you do
not accept this License.  Therefore, by modifying or propagating a
covered work, you indicate your acceptance of this License to do so.

  10. Automatic Licensing of Downstream Recipients.

  Each time you convey a covered work, the recipient automatically
receives a license from the original licensors, to run, modify and
propagate that work, subject to this License.  You are not responsible
for enforcing compliance by third parties with this License.

  An "entity transaction" is a transaction transferring control of an
organization, or substantially all assets of one, or subdividing an
organization, or merging organizations.  If propagation of a covered
work results from an entity transaction, each party to that
transaction who receives a copy of the work also receives whatever
licenses to the work the party's predecessor in interest had or could
give under the previous paragraph, plus a right to possession of the
Corresponding Source of the work from the predecessor in interest, if
the predecessor has it or can get it with reasonable efforts.

  You may not impose any further restrictions on the exercise of the
rights granted or affirmed under this License.  For example, you may
not impose a license fee, royalty, or other charge for exercise of
rights granted under this License, and you may not initiate litigation
(including a cross-claim or counterclaim in a lawsuit) alleging that
any patent claim is infringed by making, using, selling, offering for
sale, or importing the Program or any portion of it.

  11. Patents.

  A "contributor" is a copyright holder who authorizes use under this
License of the Program or a work on which the Program is based.  The
work thus licensed is called the contributor's "contributor version".

  A contributor's "essential patent claims" are all patent claims
owned or controlled by the contributor, whether already acquired or
hereafter acquired, that would be infringed by some manner, permitted
by this License, of making, using, or selling its contributor version,
but do not include claims that would be infringed only as a
consequence of further modification of the contributor version.  For
purposes of this definition, "control" includes the right to grant
patent sublicenses in a manner consistent with the requirements of
this License.

  Each contributor grants you a non-exclusive, worldwide, royalty-free
patent license under the contributor's essential patent claims, to
make, use, sell, offer for sale, import and otherwise run, modify and
propagate the contents of its contributor version.

  In the following three paragraphs, a "patent license" is any express
agreement or commitment, however denominated, not to enforce a patent
(such as an express permission to practice a patent or covenant not to
sue for patent infringement).  To "grant" such a patent license to a
party means to make such an agreement or commitment not to enforce a
patent against the party.

  If you convey a covered work, knowingly relying on a patent license,
and the Corresponding Source of the work is not available for anyone
to copy, free of charge and under the terms of this License, through a
publicly available network server or other readily accessible means,
then you must either (1) cause the Corresponding Source to be so
available, or (2) arrange to deprive yourself of the benefit of the
patent license for this particular work, or (3) arrange, in a manner
consistent with the requirements of this License, to extend the patent
license to downstream recipients.  "Knowingly relying" means you have
actual knowledge that, but for the patent license, your conveying the
covered work in a country, or your recipient's use of the covered work
in a country, would infringe one or more identifiable patents in that
country that you have reason to believe are valid.

  If, pursuant to or in connection with a single transaction or
arrangement, you convey, or propagate by procuring conveyance of, a
covered work, and grant a patent license to some of the parties
receiving the covered work authorizing them to use, propagate, modify
or convey a specific copy of the covered work, then the patent license
you grant is automatically extended to all recipients of the covered
work and works based on it.

  A patent license is "discriminatory" if it does not include within
the scope of its coverage, prohibits the exercise of, or is
conditioned on the non-exercise of one or more of the rights that are
specifically granted under this License.  You may not convey a covered
work if you are a party to an arrangement with a third party that is
in the business of distributing software, under which you make payment
to the third party based on the extent of your activity of conveying
the work, and under which the third party grants, to any of the
parties who would receive the covered work from you, a discriminatory
patent license (a) in connection with copies of the covered work
conveyed by you (or copies made from those copies), or (b) primarily
for and in connection with specific products or compilations that
contain the covered work, unless you entered into that arrangement,
or that patent license was granted, prior to 28 March 2007.

  Nothing in this License shall be construed as excluding or limiting
any implied license or other defenses to infringement that may
otherwise be available to you under applicable patent law.

  12. No Surrender of Others' Freedom.

  If conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License.  If you cannot convey a
covered work so as to satisfy simultaneously your obligations under this
License and any other pertinent obligations, then as a consequence you may
not convey it at all.  For example, if you agree to terms that obligate you
to collect a royalty for further conveying from those to whom you convey
the Program, the only way you could satisfy both those terms and this
License would be to refrain entirely from conveying the Program.

  13. Use with the GNU Affero General Public License.

  Notwithstanding any other provision of this License, you have
permission to link or combine any covered work with a work licensed
under version 3 of the GNU Affero General Public License into a single
combined work, and to convey the resulting work.  The terms of this
License will continue to apply to the part which is the covered work,
but the special requirements of the GNU Affero General Public License,
section 13, concerning interaction through a network will apply to the
combination as such.

  14. Revised Versions of this License.

  The Free Software Foundation may publish revised and/or new versions of
the GNU General Public License from time to time.  Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.

  Each version is given a distinguishing version number.  If the
Program specifies that a certain numbered version of the GNU General
Public License "or any later version" applies to it, you have the
option of following the terms and conditions either of that numbered
version or of any later version published by the Free Software
Foundation.  If the Program does not specify a version number of the
GNU General Public License, you may choose any version ever published
by the Free Software Foundation.

  If the Program specifies that a proxy can decide which future
versions of the GNU General Public License can be used, that proxy's
public statement of acceptance of a version permanently authorizes you
to choose that version for the Program.

  Later license versions may give you additional or different
permissions.  However, no additional obligations are imposed on any
author or copyright holder as a result of your choosing to follow a
later version.

  15. Disclaimer of Warranty.


  16. Limitation of Liability.


  17. Interpretation of Sections 15 and 16.

  If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.

                     END OF TERMS AND CONDITIONS

            How to Apply These Terms to Your New Programs

  If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.

  To do so, attach the following notices to the program.  It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.

    <one line to give the program's name and a brief idea of what it does.>
    Copyright (C) <year>  <name of author>

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.

Also add information on how to contact you by electronic and paper mail.

  If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:

    <program>  Copyright (C) <year>  <name of author>
    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
    This is free software, and you are welcome to redistribute it
    under certain conditions; type `show c' for details.

The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License.  Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".

  You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see

  The GNU General Public License does not permit incorporating your program
into proprietary programs.  If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library.  If this is what you want to do, use the GNU Lesser General
Public License instead of this License.  But first, please read


    Contract ABI  

  Contract Creation Code Switch To Opcodes View

   Swarm Source:


View All
Block Age txn Difficulty GasUsed Reward
View All
Block Age UncleNumber Difficulty GasUsed Reward
Make sure to use the "downvote" button for any spammy posts, and the "upvote" for interesting conversations.