Contract 0x0d500B1d8E8eF31E21C99d1Db9A6444d3ADf1270 10


Contract Overview

Polygon: WMATIC Token
314,731,580.325386281664970351 MATIC

MATIC Value:
$505,144,186.42 (@ $1.61/MATIC)

Txn Hash Method
Value [Txn Fee]
0xcfbf62d9d6322144f6658abfd0790043413e57d995cbab3992ecbe8f986a3befWithdraw218784002021-11-27 23:38:121 min ago0x6ce7a191f0179e547227f8634a5bfb3e70a28c10 IN  Polygon: WMATIC Token0 MATIC0.006585475
0x5a2d0e845c83d0828475b52433aebeca751a7ec6572f941f9a53de2a8b86acabApprove218783952021-11-27 23:37:581 min ago0xe0540375d3d9c798e13500938394406c3fbe0bfe IN  Polygon: WMATIC Token0 MATIC0.0046385
0x59f8d04237c29c3b248dd21c42ec59b9ef1b348f85fcef5e1d79d9d3b8fb1622Deposit218783912021-11-27 23:37:501 min ago0x5c1500662d910ff8533c877ae6b90b012ca06d14 IN  Polygon: WMATIC Token3 MATIC0.00135123
0xe777a33c75dc44cdbd51c981d8c89e55d76aa97c91b44f6a08b44c9f3e197a14Withdraw218783742021-11-27 23:37:161 min ago0x052739aad3cdb763b89574025d51d4cd91243de6 IN  Polygon: WMATIC Token0 MATIC0.005994296
0xec70c7bcc8d2c79d093b38b147e89507f35450eac8d0c585ad02140510c38e8eDeposit218783622021-11-27 23:36:522 mins ago0x052739aad3cdb763b89574025d51d4cd91243de6 IN  Polygon: WMATIC Token250 MATIC0.013197013
0x8dd1805b56ff45a25bb201720bfec7d79ef441cd25eb48adefb07ab2dfa63594Deposit218783542021-11-27 23:36:362 mins ago0x605206a3b58346d1714f617e5f8a3a766c638d6e IN  Polygon: WMATIC Token1.5 MATIC0.00083823
0x463a9f91f151fc3e2f846730b0d34061a9f6f23f5b460d063d885ef4afc412c1Withdraw218783542021-11-27 23:36:362 mins ago0x016a6738cdf51365f2f5e30c82931553e0a93262 IN  Polygon: WMATIC Token0 MATIC0.00243156
0x01d0a05f0ae2e9878ea0779b132c4c73af78662c5e7c173d55ff3a75d18c7ac5Withdraw218783482021-11-27 23:36:242 mins ago0x8b26320912935111300ddaeec15ea9a182ff6f1a IN  Polygon: WMATIC Token0 MATIC0.034992327
0xa2b8614bedd0e1a4300092f524dc2305dc519a7cfd1fde563350e2c38a598852Withdraw218783452021-11-27 23:36:182 mins ago0xe4724b6686dc792a816c229deb067e390b006ee2 IN  Polygon: WMATIC Token0 MATIC0.010677417
0xfbbe09eb151bbe2d61e4eec42855ffbcc4a72ec4b484306350d751d4f90a718aWithdraw218783262021-11-27 23:35:363 mins ago0xa359819fe6abed5ffe2bc0a6cfa123f3ea86b849 IN  Polygon: WMATIC Token0 MATIC0.00060789
0x6cd83c16b8f69965e1f0d122a4d4ff1b538cd27a19a6e0baf5fe4462a2f220b8Withdraw218783042021-11-27 23:34:524 mins ago0x32ea0cf7273bcc79a745620f3afda4a9206b6747 IN  Polygon: WMATIC Token0 MATIC0.00060789
0x20b0abcb6ab9e551baf7985962b154689a5909879c8aee669cc6a38752ebcbb6Deposit218783012021-11-27 23:34:464 mins ago0x7cee21fd74cff3b91c1c7251b7a4294349a0da79 IN  Polygon: WMATIC Token20 MATIC0.001576435
0x0b42f1861146ce168abc9a39418a8c5e75a1a64791548cb01afc951c514b8ac2Approve218782792021-11-27 23:34:025 mins ago0x0821bd878d0cb8755c7071560bfb16516618a56b IN  Polygon: WMATIC Token0 MATIC0.01299116
0x4bfe411f1a57d55ac0818d2af6b95d3b598c35f482b8c2bd17a5c195ca29d125Withdraw218782562021-11-27 23:33:126 mins ago0xe898563caf3b8ed945bd23e9f1a5eca1f395180e IN  Polygon: WMATIC Token0 MATIC0.030552213
0xbbc15cfaf29e6bfc08ded77d845cd2f2f2bc0694ceeefe1b8229b05875d15374Approve218782532021-11-27 23:33:066 mins ago0x7cee21fd74cff3b91c1c7251b7a4294349a0da79 IN  Polygon: WMATIC Token0 MATIC0.00046397
0xd350f3e8fff72e12bbb5fcf32d3fd52bff1a11a937c37ee3559f3d7380895bf5Approve218782462021-11-27 23:32:526 mins ago0xbf59a88485ff56fac5cbec5f68d276b0024c8355 IN  Polygon: WMATIC Token0 MATIC0.00025750335
0xa4d5cb154ca9c93fb7c13f0b34cb750e7ec78579281be0e1dee48fa205b56cb6Withdraw218782362021-11-27 23:32:326 mins ago0x268d91caa7b25ec0fe3d84bca24d5230a6aaf1d1 IN  Polygon: WMATIC Token0 MATIC0.00060789
0xf920f91f33fa0150f76dc2f733c1e9a0248f74384e4fb21e8ee6c78730619c2bWithdraw218782302021-11-27 23:32:206 mins ago0xc7f440d4c45c1ce7a295c788d9cbea9ff627cf8a IN  Polygon: WMATIC Token0 MATIC0.00011245965
0x2d9b87bc3fd3e746f7768b90baf09908f32d9b9ce1a748d789941176cd385d77Approve218782072021-11-27 23:31:307 mins ago0x6ca661bbe14d6f05cf7ac122797f2ad577f63fdb IN  Polygon: WMATIC Token0 MATIC0.00278382
0x34e6d14b4c8bcd59c72febc37ee5e784596f6269b5ac366ede32ef62ed0f49a6Approve218782032021-11-27 23:31:227 mins ago0x1e6a793466586d2f181aba13f14d7773f5ab5246 IN  Polygon: WMATIC Token0 MATIC0.00139191
0xe3764c6e99996474482ab9add59d683b1770e17105aeab67810d82b603278593Withdraw218781982021-11-27 23:31:128 mins ago0x518755fddac9d6c364651b1e8f95fc83e2a5d0e1 IN  Polygon: WMATIC Token0 MATIC0.004374216
0x3de358d5f3e880ea6a2eeb87ed6bc235e9849f2fb693c105bd0fb48662f42700Withdraw218781882021-11-27 23:30:528 mins ago0x35510a5a1274181475c3c4c4635299a7044d7c9e IN  Polygon: WMATIC Token0 MATIC0.00060825
0x26a51ed44c3e17041989bbda2932923236352589c101b9725965cccb7ab3ddb7Withdraw218781882021-11-27 23:30:528 mins ago0x82a84378ec7306e134f341b1d77d573a6bc41fff IN  Polygon: WMATIC Token0 MATIC0.00060825
0xa0483c5d5c538f94867b74d80391e8ae99b41912b529100bce2bcd2905ed109cDeposit218781832021-11-27 23:30:428 mins ago0x518755fddac9d6c364651b1e8f95fc83e2a5d0e1 IN  Polygon: WMATIC Token250 MATIC0.010854881
0x6de78029dd21686e321cb3b9ca7faefe2cdda53cac2346c8a744b0cdffad9b4dApprove218781822021-11-27 23:30:408 mins ago0x31ebc2e2986ac2f0080410301f8c952572092b76 IN  Polygon: WMATIC Token0 MATIC0.00368872
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Polygon combines the best of Ethereum and sovereign blockchains into a full-fledged multi-chain system.

Latest 25 internal transaction
Parent Txn Hash Block From To Value
0xd213ca89eee218d5ea2bb99bd172d77e0c9f47a971469e06cacfa8d560702a0d21878422- Polygon: WMATIC Token 0xdb6f1920a889355780af7570773609bd8cb1f4980.489195019398345162 MATIC
0xd213ca89eee218d5ea2bb99bd172d77e0c9f47a971469e06cacfa8d560702a0d21878422- Polygon: WMATIC Token Zapper.Fi: Quickswap Zap Out0.488762977056008115 MATIC
0x1397d0ce5d79ea43f0211ecaeaee4de212ada12134a7b711d3ba0b667c5391b321878422- 0x2bd8bdad05d179bed8048830c10b03eaea6e0e00 Polygon: WMATIC Token5 MATIC
0x4c88de6c84b7a128c9b281598e534a5a5322028edfd0e795b65a6d9bfa5e492121878422- 0xc0788a3ad43d79aa53b09c2eacc313a787d1d607 Polygon: WMATIC Token1.99538075189397794 MATIC
0x587c0a87e5c9df54394073f39eb4dcb6b7a070505d5d128b16ab8375df81cdc121878422- Polygon: WMATIC Token 0xbeadf48d62acc944a06eeae0a9054a90e5a7dc97150.000000183264699525 MATIC
0x433132ee6997691cd13421e6673090c2693cf3e2257b5a98cb0ce4bd4d35e04421878422- 0xbeadf48d62acc944a06eeae0a9054a90e5a7dc97 Polygon: WMATIC Token150 MATIC
0x8eb0c7d3cfdc0ee54d02d34d7f99f9fdc40d2a369f6b828e1ea134fedf35ad0a21878422- 0xbeadf48d62acc944a06eeae0a9054a90e5a7dc97 Polygon: WMATIC Token150 MATIC
0x3797715ad2eff96ebf546572919b476f9a8090f7a7442a99ae09c7858e40f5bf21878422- 0xdb6f1920a889355780af7570773609bd8cb1f498 Polygon: WMATIC Token1 MATIC
0xb8992b9e41245dd29866ea62c4c962bea3d75e8b526953e3974a1b44b4734f1b21878421- Polygon: WMATIC Token 0xb88891076e2d610b8d93cc98f54e30f33577905762.103424954938126637 MATIC
0xdd1f8d9656f631d38408c197096dadae42618e72f8d5ad5bf3a67eeda668838c21878421- Polygon: WMATIC Token 0xf3938337f7294fef84e9b2c6d548a93f956cc28112.61694145140720576 MATIC
0x782bd2af589bdc20e993bd02c9326db07cd7cd4544621b4403e84fe0fdd32a8e21878421- Polygon: WMATIC Token QuickSwap: Router6.883192758944197719 MATIC
0x64fd09c1aa7ea9aa4054a71786b61baaacc8f4c53bfd91936b4f1acdb7caa22621878421- QuickSwap: Router Polygon: WMATIC Token5 MATIC
0x28eb5788b09cc8e307aa587903a1af71d1aca491c6d1cebc6b3fcd563bb7862221878421- Polygon: WMATIC Token SushiSwap: SushiV2Router024.985415377819393606 MATIC
0xffbfd2db3eaac6814cb853c79bc1fa99fd8cdabcc22a4e7ddf446b0e8736385b21878421- 0xbeadf48d62acc944a06eeae0a9054a90e5a7dc97 Polygon: WMATIC Token150 MATIC
0x64ecd22593bbd8227f8b5425bca9c629e53ce7f44048a6e4de5d1ffa8bc2e51a21878421- 0xbeadf48d62acc944a06eeae0a9054a90e5a7dc97 Polygon: WMATIC Token150 MATIC
0xb7319b73b40f3f422bcfeb9da8fe55298427ac90905ebe2b905c821969ea20d721878420- QuickSwap: Router Polygon: WMATIC Token15.5 MATIC
0xba1ed1c8a98b2aa00044142eab3f6dd80568ae1b5fc682600c6969e6caf9a72621878420- Polygon: WMATIC Token 0xbeadf48d62acc944a06eeae0a9054a90e5a7dc97150.000000137448294658 MATIC
0xe301a523cff4932c5973be1f293e81a68ad68412697ad9be648e213e440f243321878420- Polygon: WMATIC Token QuickSwap: Router4.970034689316615571 MATIC
0x3bef07f00db0b3dd05db9e602c258736635578d5a3c01a1c6df343ceb9dd745221878420- QuickSwap: Router Polygon: WMATIC Token6 MATIC
0x8da1dcbbaeb646153f909e69c11c32fb86a09b5b6705d80a58c73cd4c2aec6a521878420- Polygon: WMATIC Token 0xbeadf48d62acc944a06eeae0a9054a90e5a7dc97150.000000183264551983 MATIC
0x61bdc66a0a22e8957b6fdb1b24afa68ce41831719a5830e45c7b75aac6fd45bd21878420- Polygon: WMATIC Token 0xbeadf48d62acc944a06eeae0a9054a90e5a7dc97150.000000160356423346 MATIC
0x5f4ecc0dab39ce92b2790c26a2374cbd844478d7219566541f5f2c75afa1e31221878420- Polygon: WMATIC Token 0xbeadf48d62acc944a06eeae0a9054a90e5a7dc97150.000000183264551983 MATIC
0xb8c7418cc301f56b44507ce3b7cd2b429e0a3d94bf8db769ca23849b3c5fcf1321878420- Polygon: WMATIC Token QuickSwap: Router5.96404074876987593 MATIC
0x7dae8e478a644809e566f809867c3fd6b2c8b1cd7897fae27aab4cd35997e84d21878420- Polygon: WMATIC Token 0xbeadf48d62acc944a06eeae0a9054a90e5a7dc97150.000000183264551983 MATIC
0x14335f31ecfb009222906dd1a68e0b4bac7a909195ed5bd8ca3aa8c96b8a622121878419- 0xbeadf48d62acc944a06eeae0a9054a90e5a7dc97 Polygon: WMATIC Token1 MATIC
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Contract Source Code Verified (Exact Match)

Contract Name:

Compiler Version

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion, MIT license
 *Submitted for verification at on 2021-06-09

// DeFi multi-chain yield farms deployer & DEXs aggregator.

// 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 <>.

pragma solidity ^0.4.18;

contract WMATIC {
    string public name     = "Wrapped Matic";
    string public symbol   = "WMATIC";
    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. <>
 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,
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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
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  Developers that use the GNU GPL protect your rights with two steps:
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    c) You must license the entire work, as a whole, under this
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    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
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    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
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    d) Convey the object code by offering access from a designated
    place (gratis or for a charge), and offer equivalent access to the
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    that supports equivalent copying facilities, provided you maintain
    clear directions next to the object code saying where to find the
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    e) Convey the object code using peer-to-peer transmission, provided
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    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
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is a consumer product regardless of whether the product has substantial
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  "Installation Information" for a User Product means any methods,
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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
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    d) Limiting the use for publicity purposes of names of licensors or
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    e) Declining to grant rights under trademark law for use of some
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    f) Requiring indemnification of licensors and authors of that
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    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 <>.

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 Security Audit

Contract ABI



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